Multi-string high-power lithium battery control board

Abstract

The invention discloses a multi-string high-power lithium battery control board comprising a single chip computer control module, an equalization circuit, a battery management module and an LCD (Liquid Crystal Display) module; the single chip computer control module is used for detecting the voltage of a battery pack, and the battery management module is used for transmitting signals to the single chip computer control module; an end of the battery management module is used for detecting the temperature of the battery pack and the current flowing by a resistor via a first thermal resistor and a second thermal resistor; the positive pole of the battery pack is connected with a charge / discharge shared positive pole connection end, and the negative pole of the battery pack is connected with a discharge negative pole connection end sequentially via a resistor and a first field-effect tube and then connected with a charge negative pole connection end via a second field-effect tube; the charge and discharge of the battery pack is controlled by the single chip computer control module through the control over the connection and disconnection of the first and the second field-effect tubes; and the LCD module is also controlled by the single chip computer control module. With the adoption of the battery management module, the current, the temperature and the capacity are more accurately detected; and with the adoption of the single chip computer control module as a core, high accuracy and high efficiency are achieved, the balance of batteries is improved and the cycle lives of the batteries are prolonged.

Description

technical field [0001] The invention relates to a battery control board, in particular to a multi-string high-power lithium battery control board. Background technique [0002] Lithium-ion batteries are prone to some abnormalities during use, such as overcharge and overdischarge; if overcharge occurs, the battery will swell, and may catch fire or explode in severe cases; Then the charging and discharging function is completely lost and the battery is permanently invalid. The current lithium-ion battery is equipped with overcharge and overdischarge protection circuits, which only cut off the power supply from the battery to the load after overdischarge, but there is no warning when other problems occur during use, which is not conducive to the improvement of battery quality. SUMMARY OF THE INVENTION [0003] In order to overcome the above defects, the present invention provides a multi-string high-power lithium battery control board, which can be applied to high-power lith...

AI Technical Summary

Problems solved by technology

[0002] Lithium-ion batteries are prone to some abnormalities during use, such as overcharge and overdischarge; if overcharge occurs, the battery will swell, and in severe cases it may catch fire or explode; Then completely lose the charging and discharging function and make the battery permanently invalid

The current lithium-ion batteries are equipped with overcharge and overdischarge protection circuits, which only cut off the power supply from the battery to the load after overdischarge, but there is no warning when other problems occur during use, which is not conducive to the improvement of battery quality.

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