This standard applies to the safety of battery chargers with a safety extra-low voltage output and a rated voltage not exceeding 250V for household and similar purposes. Battery chargers that are not intended for general household use but are still dangerous to the public, such as battery chargers intended for use in garages, shops, light industrial sectors and farms, also fall within the scope of this standard. As far as practical, this standard deals with public hazards generated by appliances encountered by all people in and around the home. GB 4706.18-1999 Particular requirements for safety battery chargers for household and similar electrical appliances GB4706.18-1999 Standard download decompression password: www.bzxz.net

GB4706.18-1999
This standard is equivalent to IEC335-2-29:1994 "Safety of Household and Similar Electrical Appliances Part 2: Particular Requirements for Battery Chargers", and is the first revision of GB4706.18-1988 "Particular Requirements for Safety of Battery Chargers for Household and Similar Electrical Appliances". This standard should be used in conjunction with GB4706.1-1998 "General Safety Requirements for Household and Similar Electrical Appliances". The part of this standard marked with "applicable" indicates that the corresponding provisions in GB4706.1-1998 are applicable to this standard; the part of this standard marked with "replace" or "modify" shall be subject to this standard; the part of this standard marked with "addition" indicates that in addition to complying with the corresponding provisions in GB4706.1-1998, it shall also comply with the provisions added by this standard. From the date of implementation of this standard, it will also replace GB4706.18-1988. This standard is proposed and managed by the National Technical Committee for Standardization of Household Electrical Appliances. The main drafting unit of this standard is Guangzhou Electric Science Research Institute. The main drafter of this standard is Huang Wenxiu.
This standard is entrusted to the National Technical Committee for Standardization of Household Electrical Appliances for interpretation.403
GB4706.18- 1999
IEC Foreword
1) IEC (International Electrotechnical Commission) is a worldwide standardization organization composed of national electrotechnical committees (IEC National Committees). The purpose of IEC is to promote international cooperation on issues related to standardization in the electrical and electronic fields. To this end, IEC, in addition to other activities, also publishes international standards. The formulation of these standards is entrusted to technical committees. The member national committees of IEC can participate in the formulation of the standards as long as they are interested in the standards. International, governmental and non-governmental organizations in liaison with IEC can also participate in the formulation of standards. IEC and the International Organization for Standardization (ISO) cooperate closely under the terms of the agreement between the two parties. 2) Formal resolutions or agreements of IEC on technical issues, formulated by technical committees in which all national committees with special concerns about the issue participate, express the international consensus on the issues involved as much as possible. 3) These formal resolutions or agreements are published in the form of standards, technical reports or guidelines and recommended for international use, and in this sense are accepted by the national committees.
4) For In order to promote international unification, IEC National Committees should clearly and to the greatest extent possible convert IEC international standards into national or regional standards. Any differences between IEC standards and corresponding national or regional standards should be clearly indicated in the national or regional standards.
5) IEC has not established any procedures for recognition marks. IEC is not responsible for any claim that a device complies with an IEC standard.
This standard was developed by IECTC61 (Safety Technical Committee for Household and Similar Electrical Appliances). This standard forms the third edition of IEC335-2-29 and replaces the second edition and its amendments. The text of this standard is based on the following documents: Final Draft International Standard
61(CO)793
Voting Report
61/867/RVD
For details on the voting of this standard, please see the voting reports listed in the table above. This standard is used in conjunction with the latest version of IEC335-1 and its amendments. It is based on the third edition of IEC335-1 (1991).
This standard supplements or modifies the corresponding clauses of IEC335-1 to transform it into an IEC standard: Annex A "Safety Requirements for Battery Chargers" is an integral part of this standard. All clauses in IEC335-1 that are not specifically mentioned in this standard shall be adopted as long as it is reasonable. For the parts of this standard that are written as "added", "modified" or "replaced", the relevant contents in IEC335-1 shall be modified accordingly. NOTE
1 The following fonts are used:
Requirements text: Roman font;
Test specifications: Italic font;
-Notes: Small Roman font.
Words printed in bold in the text are defined in Chapter 2. When a definition in Part 1 refers to an adjective, the adjective and the associated noun are also in bold.
2 The clauses and figures added to IEC 335-1 are numbered starting with 101. The following differences exist in some countries:
-2.2.9 In the United States, simulated loads may not be used. …3 In Australia, the dc component on the neutral conductor of the appliance is limited. 404
GB4706.18-1999
-10.101 In the United States, the dc output voltage shall not exceed 30 V. 11.2 In the United States, the appliance is not placed in the test corner. -21.101 In the United States, the form of the drop test is different for battery chargers with a mass of less than 18 kg. 21.102 In the United States, the test is different. 22.26 In the United States, basic insulation is allowed between live parts and safety extra-low voltage. ---25.7 In Finland, special rubber-insulated and armored flexible cords are required for certain types of battery chargers. 405
1 Scope
National Standard of the People's Republic of China
Safety of household and similar electrical appliances
Particular requirements for battery chargers
Safety of household and similar electrical appliancesParticular requirements for battery chargersGB4706.1--1998 This chapter is replaced by the following. 3—1999
GB 4706.18-
idt IEC 335-2-29:1994
Replaces GB4706.18—1988
This standard applies to the safety of battery chargers for household and similar purposes, with an output voltage of safety extra-low voltage and a rated voltage not exceeding 250V. Battery chargers that are not intended for general household use but are still dangerous to the public, such as battery chargers intended for use in garages, shops, light industrial sectors and farms, are also within the scope of this standard. As far as practicable, this standard deals with public hazards arising from appliances encountered by all persons in and around the home. This standard does not generally consider:
Appliances used by unattended children or disabled persons; appliances that are played with by children.
1 Attention should be paid to the following facts:
Battery chargers intended for use in vehicles, ships or aircraft may require additional requirements; appliances intended for use in tropical countries may require special requirements; - In many countries, some additional requirements are established by their public health and labor protection departments. 2 This standard does not apply to:
Built-in battery chargers, except battery chargers installed in caravans and similar vehicles; - Battery chargers that form an integral part of an appliance and the battery of the appliance is not accessible to the user; Battery chargers specially designed for industrial use; - Battery chargers intended for use in corrosive or explosive atmospheres (dust, vapor or gas); Rechargeable battery-driven appliances (GB4706.1-1998, Appendix B); Battery chargers consisting of more than one unit; - Battery chargers for toys;
Power supply units for electronic equipment;
·Battery chargers and power supply units for electronic flash devices for photography (IEC491); - Battery chargers intended for use in electric vehicles (IEC718). 2 Definitions
This chapter in GB 4706.1-1998 is applicable except for the following. 2.2.1 Added:
Rated voltage refers to the rated input voltage.
2.2.6 Added:
Approved by the State Administration of Quality and Technical Supervision on November 11, 1999. 406
Implementation on May 1, 2000
Rated current refers to the rated input current.
2.2.9 Replaced:
Normal operation
The battery charger operates as follows:
GB 4706.18—1999
Battery chargers for charging lead-acid batteries and battery chargers for charging other batteries with a rated dc output current not exceeding 20 A are connected to the circuit of Figure 101. The variable resistor is adjusted so that the current in the circuit is the rated dc output current when the battery charger is supplied with the rated voltage.
When the charging current is controlled by the state of charge of the battery, a discharged battery of the type having the maximum capacity specified in the instructions for use is substituted for the variable resistor and the capacitor. Other battery chargers are connected to a discharged battery of the type having the maximum capacity specified in the instructions for use. NOTE: A battery is considered to be discharged if: - for lead-acid batteries, the specific gravity of the electrolyte is less than 1.16; - for nickel batteries, the voltage of a single cell is less than 0.9 V. 2.101 Rated dc output voltage rated dc output voltage The dc output voltage specified by the manufacturer for the battery charger. NOTE: The rated dc output voltage of a battery charger is equal to the product of the number of batteries to be charged in series and the nominal voltage of the single cell. 2.102 Rated dc output current rated dc output current specified by the manufacturer for the battery charger. 2.103 dc distribution board dc distribution board A panel in a caravan containing circuits for distributing dc power to sockets or terminals. 3 General requirements
This chapter in GB4706.1-1998 applies. 4 General conditions for testing
This chapter in GB4706.1-1998 applies except as follows. 4.2 Addition:
If the test of 21.101 is to be performed, two additional battery chargers are required. 4.10 Unless otherwise specified, the battery charger is tested as an electric appliance. 5 Blank
6 Classification
This chapter in GB4706.1-1998 applies.
Marking and instructions
This chapter in GB4706.1—1998 is applicable except for the following contents. 7.1 Addition:
The battery charger shall be marked with the following contents:
Rated DC output voltage, V;
Rated DC output current, A;
Note 1: Other output currents shall not be marked.
Rated current of the protective device installed on the DC distribution board, A; 407
GB 4706.18—1999
——Polarity of output terminals. The positive terminal shall be marked with red or a "+" and the negative terminal shall be marked with black or a "-". Note 2: For battery chargers that can avoid incorrect polarity connection, polarity marking is not required. Time-current characteristics of time-delay fuses; if the output is not less than 20VA, the following content shall also be included: · Read the instructions before charging;
· For indoor use or beware of rain (unless the enclosure protection level of the battery charger is at least IPX4). If the output is not less than 20VA and the battery charger is used to charge lead-acid batteries, the following content shall also be marked: · Disconnect the power supply before connecting or disconnecting the battery charger from the battery; · Warning: Explosive gas, beware of flames or sparks, and provide adequate ventilation during charging. The DC distribution board shall be marked with the following Contents:
The maximum output current of each output circuit, A; the type of any additional power source that can be connected. Battery chargers equipped with an engine crank switch (which allows the battery charger to provide supplemental starting current to the engine) should be marked with the following:
- Maximum "on" time;
- Minimum "off" time or the maximum ratio between the "on" time and the "off" time. 7.4 Added:
If the battery charger can be adjusted to different rated DC output voltage values, the output voltage values ​​to which the battery charger can be adjusted should be clearly visible.
7.12 Added:
The instruction manual should:
- Specify the battery types suitable for the battery charger, quantity and rated capacity (A·h); include a warning: it is forbidden to charge non-rechargeable batteries; - For battery chargers that charge lead-acid batteries, indicate that the batteries must be placed in a well-ventilated area during the charging process; - For portable Class I battery chargers used outdoors, indicate that they must be plugged into a grounded socket; For automatic battery chargers, explain their automatic functions and adjustment range; For battery chargers that charge automotive batteries, the following content should be included: · One end of the battery that is not connected to the chassis must be connected first. Then connect the other end of the battery charger to the chassis, with the connection point away from the battery and fuel lines. Finally, connect the battery charger to the power grid; · After charging is completed, disconnect from the power grid Open the battery charger. Then disconnect the connection to the chassis and then disconnect the connection to the battery. 7.12.4 Added:
The instructions for the battery charger installed in the caravan should state that the connection between the battery charger and the power supply network should comply with the national wiring regulations.
8 Protection against contact with live parts
This chapter in GB4706.1-1998 is applicable.
9 Starting of electric appliances
This chapter in GB4706.1--1998 is not applicable. 10 Input power and current
This chapter in GB4706.1--1998 is applicable except for the following. 10.101 The no-load DC output voltage should not exceed 42.4V. 408
GB 4706.18-1999
Whether the requirements are met can be determined by measuring the no-load DC output voltage when the battery charger is powered at the rated voltage. 10.102 The arithmetic mean of the output current shall not deviate from the rated DC output current by more than 10%. Compliance may be determined by connecting the battery charger to the circuit of Figure 101. Supply power to the battery charger at the rated voltage, adjust the variable resistor to bring the output voltage to the rated value, and then measure the output current. 11 Heating
This chapter in GB4706.1-1998 is applicable except for the following. 11.2 Modification:
Place the battery charger in the test angle specified for electric heating appliances. 11.5 Modification:
The battery charger is supplied with power only at 1.06 times the rated voltage. 11.7 Replacement:
The battery charger is operated until a steady state is reached. 12 Blank
13 Leakage current and electrical strength at operating temperature This chapter in GB4706.1-1998 is applicable. 14 Blank
15 Moisture resistance
This chapter in B4706.1-1998 is applicable.
16 Leakage current and electric strength
This chapter in GB4706.1-1998 is applicable. Overload protection of transformers and related circuits
This chapter in GB 4706.1-1998 is applicable except for the following contents. Added:
The output terminals of the battery charger are short-circuited.
18 Durability
This chapter in GB4706.1-1998 is not applicable. 19 Abnormal operation
This chapter in GB4706.1--1998 is applicable except for the following contents. 19.1 Added:
Whether the requirements are met shall also be determined by the tests of 19.101 to 19.103. 19.13 Added:
During the test, the values ​​of Table 6 apply.
19.101 The battery charger is supplied with power at rated voltage and operated in normal operating conditions, and any controls that are activated during the test in Chapter 11 are short-circuited.
GB 4706. 18—1999
19.102 The battery charger is connected to a charged battery, with the wiring reversed from that in normal use. The type of battery and its maximum capacity are as specified in the instruction manual; however, the capacity of lead-acid batteries is 70A·h. When the battery charger is in operation, it is supplied with power at rated voltage. 19.103 The battery charger, which is integral to the DC switchboard, is supplied with power at rated voltage and operated in normal operating conditions until a steady state is established. Increase the load to increase the output current by 10% until a steady state is established again. Repeat this procedure until the protective device operates. 20 Stability and mechanical hazards
This clause in GB4706.1—1998 applies. 21 Mechanical Strength
This chapter in GB4706.11998 is applicable except for the following contents. Modification:
The impact energy is replaced by 1.0J±0.05J instead of the specified value. Addition:
Whether it meets the requirements shall also be checked by the test in 21.101. 21.101 Battery chargers other than built-in battery chargers, with a mass not exceeding 5 kg, are subjected to the following test on three specimens: The battery charger is dropped from a height of 1 m onto a concrete floor, with each specimen striking the floor in a different position. The battery charger shall not have damage that would affect compliance with 8.1, 15.1.1, 16.3 and 29.1. 21.102 Battery chargers installed in caravans shall withstand the vibrations to which they may be subjected. Compliance may be determined by carrying out the vibration test specified in GB/T 2423.10, under the following conditions: The battery charger is built-in into a housing made of plywood approximately 20 mm thick, the internal dimensions of the housing being the minimum dimensions specified in the installation instructions;
--- the housing is fixed to a vibration generator and the battery charger is in its normal position of use; the direction of vibration is vertical, the amplitude is 0.35 mm:
--- the sweep frequency range is 10 Hz to 55 Hz; - the test duration is 30 min.
The battery charger shall not have damage that would affect compliance with 8.1, 15.1.1, 16.3 and 29.1, and the connections shall not become loose. 22 Construction
This chapter in GB 4706.1-1998 applies except as follows. 22.26 Replacement:
The output circuit shall be supplied with power through a safety isolating transformer. There shall be no connection between the output circuit and other accessible metal parts or earthing terminals. The insulation between parts operating at safety extra-low voltage and live parts shall comply with the requirements for double insulation or reinforced insulation. Compliance may be determined by observation and the tests specified for double insulation and reinforced insulation. 22.101 The wire connected to the positive terminal of the battery shall be red and the wire connected to the negative terminal of the battery shall be black. This requirement does not apply to the following:
Output conductors are provided with polarized connectors;
The polarity of the connecting wire is automatically determined by the battery charger; The insulation of a conductor or the terminal of a conductor connected to the positive terminal of the battery is permanently marked by a mark visible when the battery charger is connected to the battery.
Compliance may be checked by inspection. 22.102 Each circuit supplied by a d.c. distribution board shall be equipped with an overload protection device. 410
Compliance may be checked by inspection. GB4706.18—1999
22.103 Battery chargers installed in caravans are so constructed that they can be securely fixed to a support. Compliance may be checked by inspection. NOTE Keyhole slots, hooks and similar devices are not considered to be sufficient to secure the battery charger securely if there are no further means to prevent the battery charger from being accidentally pulled out of the support. 23 Internal wiring
This chapter in GB4706.1-1998 is applicable. 24 Components
This chapter in GB4706.1-1998 is applicable except for the following contents. 24.5 Added:
This requirement applies to sockets in output circuits. 25 Power supply connection and external flexible cord
This chapter in GB4706.1-1998 is applicable except for the following contents. 25.7 Added:
Natural rubber flexible cords are not allowed to be used for battery chargers for charging vehicle batteries. 26 Terminals for external wires
This chapter in GB4706.1--1998 is applicable except for the following contents. 26.10 Added:
This requirement does not apply to terminals in output circuits. Grounding measures
This chapter in GB4706.1-1998 is applicable.
Screws and connections
This chapter in GB4706.1-1998 is applicable. 29 Creepage distances, clearances and through insulation distances This chapter in GB4706.1-1998 is applicable.
30 Resistance to heat, flame and tracking resistance
This chapter in GB4706.1-1998 is applicable except for the following. 30.2.2 is not applicable.
31 Rust prevention
This chapter in GB4706.1--1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1--1998 is applicable. 411
Charger
GB4706.18—1999
U,--power supply voltage; U--output voltage; l2-output current, A-average current ammeter V-average voltage voltmeter; R-variable resistor; T, and T,-terminals of the battery charger output circuit; C-capacitor, F. Its capacity is calculated by the following formula: Cm12.5 × p..U.
Where: I.--rated DC current, A; p1, half-wave rectification, 2, full-wave rectification,
f--power supply frequency, Hz;
U,-rated DC output voltage, V.
The capacitance value of the capacitor used is allowed to differ by ±20% from the value obtained by the same formula; the capacitor should be pre-charged before the battery charger can work. 2
Figure 101
Test circuit for battery charger
GB 4706.18—1999
All the appendices of GB4706.1-1998 except the following are applicable: Appendix A
(Appendix to the standard)
Cited standards
Addition:
GB/T 2423.10—1995
IEC 491:1984
Environmental testing for electric and electronic products
Part 2: Test methods
Test Fc and guidance: Vibration (sinusoidal) (idtIEC68-2-6:1982)
Safety requirements for electronic flash equipment for photographic use Electrical equipment for supplying battery-driven road vehicles IEC718:19927 Added:
Natural rubber cords are not allowed to be used for battery chargers for charging automotive batteries. 26 Terminals for external conductors
This chapter in GB4706.1-1998 is applicable except for the following contents. 26.10 Added:
This requirement does not apply to terminals in output circuits. Grounding measures
This chapter in GB4706.1-1998 is applicable.
Screws and connections
This chapter in GB4706.1-1998 is applicable. 29 Creepage distance, electrical clearance and through insulation distance GB4706.11998 is applicable.
30 Heat resistance, flame resistance and tracking resistance
This chapter in GB4706.1-1998 is applicable except for the following contents. 30.2.2 Not applicable.
31 Rust prevention
This chapter in GB4706.1--1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1--1998 is applicable. 411
Charger
GB4706.18-1999
U,--power supply voltage; U--output voltage; l2-output current, A-average current ammeter V-average voltage voltmeter; R-variable resistor; T, and T,-terminals of the battery charger output circuit; C-capacitor, F. Its capacity is calculated by the following formula: Cm12.5 × p..U.
Where: I.--rated DC current, A; p1, half-wave rectification, 2, full-wave rectification,
f--power supply frequency, Hz;
U,--rated DC output voltage, V.
The capacitance value of the capacitor used is allowed to differ by ±20% from the value obtained by the same formula; the capacitor should be pre-charged before the battery charger can work. 2
Figure 101
Test circuit for battery charger
GB 4706.18—1999
All the appendices of GB4706.1-1998 except the following are applicable: Appendix A
(Appendix to the standard)
Cited standards
Addition:
GB/T 2423.10—1995
IEC 491:1984
Environmental testing for electric and electronic products
Part 2: Test methods
Test Fc and guidance: Vibration (sinusoidal) (idtIEC68-2-6:1982)
Safety requirements for electronic flash equipment for photographic use Electrical equipment for supplying battery-driven road vehicles IEC718:19927 Added:
Natural rubber cords are not allowed to be used for battery chargers for charging automotive batteries. 26 Terminals for external conductors
This chapter in GB4706.1-1998 is applicable except for the following contents. 26.10 Added:
This requirement does not apply to terminals in output circuits. Grounding measures
This chapter in GB4706.1-1998 is applicable.
Screws and connections
This chapter in GB4706.1-1998 is applicable. 29 Creepage distance, electrical clearance and through insulation distance GB4706.11998 is applicable.
30 Heat resistance, flame resistance and tracking resistance
This chapter in GB4706.1-1998 is applicable except for the following contents. 30.2.2 Not applicable.
31 Rust prevention
This chapter in GB4706.1--1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1--1998 is applicable. 411
Charger
GB4706.18-1999
U,--power supply voltage; U--output voltage; l2-output current, A-average current ammeter V-average voltage voltmeter; R-variable resistor; T, and T,-terminals of the battery charger output circuit; C-capacitor, F. Its capacity is calculated by the following formula: Cm12.5 × p..U.
Where: I.--rated DC current, A; p1, half-wave rectification, 2, full-wave rectification,
f--power supply frequency, Hz;
U,--rated DC output voltage, V.
The capacitance value of the capacitor used is allowed to differ by ±20% from the value obtained by the same formula; the capacitor should be pre-charged before the battery charger can work. 2
Figure 101
Test circuit for battery charger
GB 4706.18—1999
All the appendices of GB4706.1-1998 except the following are applicable: Appendix A
(Appendix to the standard)
Cited standards
Addition:
GB/T 2423.10—1995
IEC 491:1984bzxZ.net
Environmental testing for electric and electronic products
Part 2: Test methods
Test Fc and guidance: Vibration (sinusoidal) (idtIEC68-2-6:1982)
Safety requirements for electronic flash equipment for photographic use Electrical equipment for supplying battery-driven road vehicles IEC718:1992
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