Charging circuit capable of choosing maximum current
A charging circuit and maximum current technology, applied in battery circuit devices, circuit devices, charging/discharging current/voltage regulation, etc., can solve problems such as prolonged charging time, troublesome use, shortened battery life, etc., to increase capacity and facilitate use Effect
Pending Publication Date: 2018-02-23
东莞启益电器机械有限公司
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Problems solved by technology
[0002] The traditional single-capacity lithium battery pack needs to be matched with a special lithium battery charger, which will prolong the overall life of the lithium battery pack and the optimal charging time
According to the needs of various occasions, battery packs of different sizes and capacities will be developed. In the battery packs of various capacities, there will be dedicated chargers for each capacity, which will cause trouble in use.
For example, a large-capacity battery pack is placed in a small-capacity battery pack with a charger. If the charging current is too small, it will prolong the charging time and cause inconvenience to users; or a small-capacity battery pack is placed in a charger with a large-capacity battery pack. Its battery life is shortened because the charging current is too large
Method used
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[0014] like Figure 2 to Figure 4 As shown, the optional maximum current charging circuit of the present invention includes a power supply circuit unit 100, an auxiliary power supply unit 200, a current control unit 300, and a capacity identification unit 400. The power supply circuit unit 100 is electrically connected to the auxiliary power supply unit 200, and the power supply The circuit unit 100 is used to provide the voltage and current required for the operation of the auxiliary power unit 200 and the current control unit 300. The auxiliary power unit 200 is electrically connected to the current control unit 300. The auxiliary power unit 200 is a traditional primary constant current constant voltage control circuit, the auxiliary power supply unit 200 is provided with a primary power supply unit 210, a secondary power supply unit 220 and a transformer unit 230, the current control unit 300 is electrically connected to the primary power supply unit 210, and the secondary p...
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The invention discloses a charging circuit capable of choosing a maximum current. The charging circuit capable of choosing the maximum current comprises a power supply circuit unit, an auxiliary powersupply unit, a current control unit and a capacity identification unit. The power supply circuit unit is electrically connected to the auxiliary power supply unit. The auxiliary power supply unit iselectrically connected to the current control unit. The capacity identification unit is electrically connected to the current control unit. The capacity identification unit is electrically connected to a lithium battery pack and the lithium battery pack is provided with an ID interface. A first photoelectric coupler, a second photoelectric coupler and a third photoelectric coupler are arranged. Afirst resistor, a second resistor and a third resistor are electrically connected to a collectors of the photoelectric couplers. The capacity identification unit is electrically connected to the lithium battery pack. Comparison is made on voltage of an inverted input end of a comparator and voltage of the ID interface to control the photoelectric couplers to move or not to move, so that matched charging current is chosen to charge the lithium battery pack. The charging circuit capable of choosing the maximum current is easy to use and has a capability of being compatible with lithium batteriesof various capacities by increasing lithium battery charging circuits.
Description
technical field [0001] The invention relates to the technical field of consumer electronics, in particular to a charging circuit with selectable maximum current. Background technique [0002] The traditional single-capacity lithium battery pack needs to be matched with a dedicated lithium battery charger, which will prolong the overall life of the lithium battery pack and the optimal charging time. According to the needs of various occasions, battery packs of different sizes and capacities will be developed, and the battery packs of various capacities will be equipped with special chargers for each capacity, which will cause trouble in use. For example, a large-capacity battery pack is placed in a small-capacity battery pack with a charger. If the charging current is too small, it will prolong the charging time and cause inconvenience to users; or a small-capacity battery pack is placed in a charger with a large-capacity battery pack. Its battery life is shortened because t...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0072H02J7/007H02J2207/20H02J7/00
Inventor 王定国
Owner 东莞启益电器机械有限公司