Battery protection system and mobile terminal

Abstract

The invention discloses a battery protection system and a mobile terminal. The battery protection system comprises a battery module and a load detection unit. The battery module comprises a battery unit and a battery protection unit; a first end of the load detection unit is connected with the battery protection unit; a second end of the load detection unit is connected with a battery voltage endof a load module of the battery module; the load detection unit is used for determining a target voltage according to the battery voltage of the load module; the target voltage is the voltage of the connecting end of the battery protection unit and the load detection unit; and the battery protection unit is used for determining the load connection state of the battery module according to the target voltage and controlling the external power supply state of the battery unit according to the load connection state. According to the invention, potential safety hazards caused by the fact that the battery unit is always in an external power supply state can be eliminated, and safety is improved.

Description

technical field [0001] The invention relates to the field of terminals, in particular to a battery protection system and a mobile terminal. Background technique [0002] At present, all mobile terminals use a built-in battery (such as a lithium ion battery) to provide power to themselves. And in order to ensure the safety and stability of the built-in battery, a special protection circuit will be set inside the battery module to prevent the battery from overcharging, overdischarging, short circuit, overcurrent and overtemperature risks. [0003] Such as figure 1 The shown existing battery protection system includes a battery module 1 and a load module 2, wherein the battery module 1 includes a battery unit 11, a battery protection unit 12, a current detection unit 13 and a switch unit 14, wherein the battery The positive pole of the cell 11 is denoted by P+, and the negative pole of the battery cell is denoted by P-. When the current detection unit 13 detects that the out...

AI Technical Summary

Problems solved by technology

In the production and after-sales maintenance process of the mobile terminal, before the load circuit 21 on the load module (main board) 2 of the battery module 1 and the mobile terminal is not assembled, because the positive pole and the negative pole of the battery unit 11 are always in the state of external power supply, so There may be many security risks

For example, during the assembly process, the positive pole and the negative pole of the battery unit 11 contact other metal conductors, causing the positive pole and the negative pole of the battery unit 11 to short circuit, so that the battery unit 11 closes the current output due to short-circuit protection; or such as, the positive pole and the negative pole of the battery unit 11 The negative electrode mistakenly contacts the circuit on the load module 2 of the mobile terminal, causing damage to the components in the load module 2 of the mobile terminal, etc.

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