What Should I Consider When Buying a Battery Charger?

Battery chargers are electronic devices for charging rechargeable batteries used in electric vehicles, electric tools, video games, notebooks, photovoltaics, digital and small portable electronic devices and electronic appliances. They are generally composed of a casing, a power conversion section, a charging detection section, and a charging protection section composition. Its output type is pure DC or pulsating DC. According to the connection method, it can be divided into wall-insertion type and desktop type. According to the type of battery charged, it can be divided into nickel-cadmium battery charger, nickel-hydrogen battery charger, nickel-zinc battery charger, lead-acid battery charger, lithium battery charger, and lithium iron phosphate charger.

Battery charger (also known as battery charger). The battery charger is an electric vehicle,

Generally consists of a housing, a power conversion section, a charge detection section, a charge protection section, and the like. Its output type is pure DC or pulsating DC.

According to the connection method, it can be divided into wall-insertion type and desktop type.

Usually you have to press yourself first

There are many types of battery chargers on the market: rechargeable alkaline battery chargers, nickel-metal hydride battery chargers, and nickel-cadmium battery chargers. When buying a battery charger, it is recommended that you can buy a multi-function battery charger, which can reduce some costs.

Battery charger CE certification standard

Charger CE Regulation Directive 2006/95 / EC, 2004/108 / EC

EN60335-1

EN60335-2-29

EN61000-3-2

EN61000-3-3

EN55014-1

EN55014-2

Battery Charger GS Certification Standard

EN60335-1

EN60335-2-29

Battery charger CB certification standard

IEC60335-1

IEC 60335-2-29

Battery Charger PSE Certification Standard

J60335-1

J60335-2-29

Battery charger SAA certification standard

AS / NZS 60335.2.29

AS / NZS 60335.2.29

Battery charger CC C certification standard

GB4706.1

GB4706.18

GB17625.1-1998

GB17625.2-1998

GB4343-1995 ^[1]

Battery charging control method

In order to prevent the battery from being overcharged, it is necessary to control the charging end point. When the battery is fully charged, there will be some special information available to determine whether the charging has reached the end point. There are six ways to prevent the battery from being overcharged:

1. Peak voltage control: Determine the end of charging by detecting the peak voltage of the battery;

2. dT / dt control: Judging the end point of charging by detecting the rate of change of the battery peak temperature;

3. T control: When the battery is fully charged, the difference between the temperature and the ambient temperature will reach the maximum;

4. -V control: When the battery is fully charged and reaches a peak voltage, the voltage will drop by a certain value

5. Timing control: Control the charging end point by setting a certain charging time, generally set the time required to charge 130% of the nominal capacity to control;

6. TCO control: Considering the safety and characteristics of the battery, charging at high temperature (except for high temperature batteries) should be avoided, so charging should be stopped when the battery temperature rises to 60 OC.

Performance characteristics

Charger technical parameter table

Input voltage:

AC: 100-240V

Output voltage: 4.2-60V

Input current: 0.3-9.9 A

Input power: 0.5W max at no load, at input voltage 100-240VAC50 / 60Hz. Load (I l) 220W max

EFFICIENCY efficiency:

80% MIN. AT RATED INPUT AND OUTPUT

TEMPERATURE RISING: CASE75 MAX .FOR RATED OUTPUT

INSULATION RESISTANCE: 500VDC 100M MIN.

Pressure test:

5mA 3000VAC time is 1 minute, between input and output, input and shell, time is one minute, when choosing to increase the withstand voltage by 5%, the application time is 1 second.

INRUSH CURRENT:

PEAK INRUSH CURRENT SHALL BE LIMITED 30A FOR A COLD START

ENVIRONMENTAL environment:

Working environment temperature range: -29 TO + 45.5

Storage ambient temperature range: -40 TO + 75

Heat resistance: The tested product is placed in a 105 ± 3 high temperature box. After 16 hours, the test is performed. The product must meet the requirements of 4.7 withstand voltage test. Insulation resistance: 500VDC not less than 10 M ohms. Between input and output, input and enclosure ...

Humidity resistance: Leave it for 6 hours at an ambient temperature of 40 ± 2 and a relative humidity of 90% to 95%. Take it out for 10 minutes and test it.

reliability:

Full load rating, operating temperature 25 . Product life is within 30,000 hours.

PROTECTION protection:

Current protection: The product has a built-in current fuse, type 250V 3A, which is fixed in the input circuit.

Short circuit protection: Capable of continuous short circuit resistance and automatic recovery.

Additional requirements: Charging mode: anti-reverse current, anti-reverse connection, anti-short circuit, anti-overvoltage, anti-overcurrent.

INSPECTION check:

100% inspection items: no-load voltage, load voltage, ripple voltage, primary current, withstand voltage test and general appearance inspection.

In addition to 100% inspection items, sampling inspections also include insulation resistance and audible sound inspections.

Submit a sampling inspection report and a 100% pressure test report for each batch.

Level of sampling inspection items: MIL-STD-105E Fatal fault 0, major fault 0.25, minor fault 1.0.

Operating mode:

Constant current-constant voltage-trickle, three-stage intelligent turn light.

Association certification:

UL, CUL, FCC, NRcan, TUV / GS, CE, SAA, C-tick, MEPS, KC, PSE, CCC, ErP ^[2]