Battery pack power supply circuit capable of achieving over-temperature protection

Abstract

An uninterruptable battery pack power supply device capable of achieving over-temperature protection comprises a control circuit, a plurality of battery packs in parallel connection, a plurality of over-temperature detection circuits and a plurality of charge-discharge driving circuits. Each battery pack comprises cells in series connection, the anode end of each battery pack is connected with the positive output end of the device, and the cathode end of each battery pack is connected with the negative output end of the device through the corresponding charge-discharge driving circuit. Each over-temperature detection circuit is used for detecting temperatures of the cells of the corresponding battery pack and comparing temperature values of the cells with a preset safety temperature threshold value; when the temperature values of the cells are smaller than the preset temperature threshold value, the over-temperature detection circuit outputs normal temperature signals to the control circuit so as to drive the corresponding charge-discharge driving circuit to be conducted; when the temperature value of at least one of the cells is larger than the preset safety temperature threshold value, the over-temperature detection circuit outputs over-temperature signals to the control circuit so as to control the corresponding charge-discharge driving circuit to be cut off. The uninterruptable battery pack power supply device capable of achieving over-temperature protection is capable of providing stable and safe power supply.

Description

technical field [0001] The invention relates to a battery pack over-temperature protection power supply circuit. Background technique [0002] With the development of society, the market demand for new energy battery packs is increasing, especially for high-end vehicles such as electric vehicles and scooters. When the temperature of the battery pack is too high, if it continues to be used (that is, charging or discharging), it will cause great damage to the battery pack, and even cause safety accidents such as fire and explosion. [0003] Such as figure 1 As shown, the existing over-temperature protection circuit of the battery pack uses a mechanical temperature switch or a resistive temperature switch installed near the battery pack to detect the ambient temperature of the battery pack, and the system performs power-off processing when over-temperature is detected. The battery pack is generally composed of several battery cells in series, and the temperature switch detect...

AI Technical Summary

Problems solved by technology

The battery pack is generally composed of several battery cells in series, and the temperature switch detects the ambient temperature near it. If the battery core with severe heat is far away from the temperature switch, then when the temperature switch detects overheating, the battery with severe heat will The core may be damaged, especially when the temperature rises rapidly and the temperature switch has not responded, the temperature of the entire battery pack may have been out of control

In addition, the above-mentioned battery pack will directly cut off the power supply circuit after detecting overheating without sending an early warning signal, which is quite dangerous for high-speed vehicles and may easily cause serious traffic accidents

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