Charging tube safety protection system and method and battery management system
A technology of safety protection and charging tube, applied in the direction of safety/protection circuit, battery overvoltage protection, battery overdischarge protection, etc.
Pending Publication Date: 2021-07-06
深圳芯典半导体科技有限公司
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Problems solved by technology
[0005] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a charging tube safety protection system, method and battery management system to solve the problems in the prior art when the constant voltage charging tube is driven to load and connect to the charger after over-discharging. After that, the grid source of the charging tube exceeds the withstand voltage value and is damaged
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0031] Furthermore, in the following detailed description of the present invention, numerous specific details of the present invention are provided, and it will be apparent to those of ordinary skill in the art that the present invention may be practiced without these specific details. In addition, well-known schemes, processes, components and circuits are not described in detail in order to highlight the idea of the present invention.
[0032] Such as Figure 8 as shown, Figure 8 It is an exemplary method flow chart of the charging tube safety protection circuit system according to an embodiment of the present invention. After the discharge tube safety protection circuit system works, the voltage sampling of the battery pack is first performed to determine whether there is over-discharge in one or more cells of the battery pack. If there is an over-...
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The invention discloses a charging tube safety protection system, a charging tube safety protection method and a battery management system, which are applied to a battery management chip, and compared with a traditional management system, the management system is additionally provided with a charger detection circuit, a current sampling circuit and an internal linear voltage stabilizing circuit for power supply adjustment, so that the over-discharge of a battery pack is ensured, the output power supply voltage of the linear voltage stabilizing circuit for driving and supplying power to the charging tube is reduced, namely, the gate-source voltage of the charging tube NM2 is reduced, and after the charger is connected and charging current exists, the output power supply voltage of the linear voltage stabilizing circuit for driving and supplying power to the charging tube is recovered to be normal, namely, the gate-source voltage of the charging tube NM2 is recovered, and the safety of the charging tube NM2 is protected.
Description
technical field [0001] The invention belongs to the technical field of battery protection, and relates to a charging tube safety protection system, method and battery management system. Background technique [0002] Lithium power battery, as one of the new energy sources, is now a mature technology and has applications in many directions. At the same time, multi-cell lithium batteries can be connected in series to form battery packs with different voltages and different capacities, which can supply power for high-power consumption electrical equipment, which is very convenient. . [0003] At the same time, with the demand for battery capacity, large-capacity lithium batteries appear, and at the same time, the charging technology is also being upgraded. The pressure-type PMOS drain open-drain output charging tube drive technology can quickly turn on the charging tube and improve charging efficiency. At this time, a safer battery management system is required. [0004] Such ...
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CPCH02J7/0013H02J7/00306H02J7/00308H02J7/007182
Inventor 王飞张豪曹灿刘雨鑫
Owner 深圳芯典半导体科技有限公司