CN-121983920-A - Fault battery isolation circuit, battery pack, control method and computer equipment

CN121983920ACN 121983920 ACN121983920 ACN 121983920ACN-121983920-A

Abstract

The application is applicable to the technical field of battery management, and provides a fault battery isolation circuit, a battery pack, a control method and computer equipment, which realize physical and effective isolation of any fault battery from a battery pack formed by serially connected batteries. The fault battery isolation circuit comprises a battery anode connection end and a battery cathode connection end which are communicated through one communication line of a circuit breaking isolation module, wherein the battery cathode connection end and the battery anode connection end are communicated through the other communication line of the circuit breaking isolation module, an energizing access end of the circuit breaking isolation module is connected with the anode connection end, an energizing output end of the circuit breaking isolation module is controlled by one path of a switch module and then is connected with the anode connection end, the other path of an input end of the switch module is also independently connected with the anode connection end, the circuit breaking isolation module can disconnect an own energizing circuit and two independent communication lines after being energized, and when the switch module receives a closing instruction, the circuit breaking isolation module is energized and the anode connection end is connected with the anode connection end.

Inventors

CHAO JIAN
LIANG YONGZHI

Assignees

深圳市奋达科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260112

Claims (10)

1. The fault battery isolation circuit is applied to connection between series batteries and is characterized by comprising a battery positive electrode connection end b+, a battery negative electrode connection end B-, a disconnection isolation module F, a switch module K in an off state, a negative electrode connection end B+ of a first adjacent battery in a series circuit of the series batteries and a positive electrode connection end B+ of a second adjacent battery in the series circuit of the series batteries; the positive electrode connecting end b+ and the negative electrode connecting end B-of the battery are communicated through a one-way communication line of the circuit breaking isolation module F; The battery negative electrode connecting end B-is communicated with the positive electrode connecting end B+ through another communication line of the circuit breaking isolation module F; The power-on access end of the break isolation module F is connected with the negative electrode connection end B-, and the power-on output end of the break isolation module F is connected with the positive electrode connection end B+ after being controlled by one path of the switch module K; The other path of the input end of the switch module K is also independently connected with the negative electrode connecting end B; The circuit breaking isolation module F is provided with at least two independent communication lines, and the circuit breaking isolation module F can disconnect a self-energizing circuit and the two independent communication lines after being energized; The switch module K is provided with at least two paths of independent input ends, and when the switch module K receives a preset closing instruction, the break isolation module F can be electrified and connected with the negative electrode connecting end B-and the positive electrode connecting end B+.
2. The fault battery isolation circuit of claim 1, wherein the break isolation module F is a multi-way fuse or a multi-way circuit breaker, and the switch module K is an intelligent multi-way switch; the multi-path fuse comprises a fuse with at least three independent input/output communication paths, wherein one independent input/output communication path is used for electrifying the fuse, or, The multi-path circuit breaker comprises at least three independent input/output communication lines, wherein one independent input/output communication line is used for electrifying the circuit breaker; the intelligent multi-way switch comprises at least two paths of normally-closed switches which are independently input.
3. The fault battery isolation circuit of claim 1, further comprising a choke resistor R; the input end of the switch module K is connected with the negative electrode connecting end B-through the choke resistor R.
4. The fault battery isolation circuit according to any one of claims 1 to 3, further comprising an isolation battery B; The battery anode of the isolation battery B is communicated with the battery anode connecting end b+; and the battery cathode of the isolation battery B is communicated with the battery cathode connecting end B-.
5. A battery pack, comprising n faulty battery isolation circuits according to claim 4, an output controller, n being an integer greater than 1; Negative electrode connection end of 1 st fault battery isolation circuit Positive electrode connection end of isolation circuit with 2 nd fault battery Connect, the n-1 th negative connection terminal of the fault battery isolation circuit Positive electrode connection end of isolation circuit with nth fault battery The 1 st positive electrode connecting end of the fault battery isolation circuit is connected Negative electrode connection terminal of isolation circuit with nth fault battery And the power of the isolated batteries of the n fault battery isolation circuits is output through the output interfaces of the output controller.
6. The battery pack of claim 5, further comprising a fault detection module; The output controller is also connected with a switch module of each fault battery isolation circuit through a communication line; the fault detection module monitors the state parameters of the isolated battery of each fault battery isolation circuit and uploads the state parameters to the output controller through a communication cable.
7. The battery pack of claim 6, further comprising a DCDC module; The DCDC module is connected before the output interface of the output controller, And an output interface of the output controller processes the total voltage of the isolated batteries of all the fault battery isolation circuits which are connected in series through the DCDC module and outputs the processed total voltage.
8. A control method, applied to the battery pack according to claim 6 or 7, comprising: When an output controller of the battery pack receives a target state parameter of a target isolation battery of a target fault battery isolation circuit which does not fall into a preset state parameter range and is uploaded by a fault detection module, the output controller sends a preset closing instruction to a target switch module of the target fault battery isolation circuit, wherein the target fault battery isolation circuit is one of n fault battery isolation circuits of the battery pack, and n is an integer greater than 1; The target switch module enables the target break isolation module of the target fault battery isolation circuit to be electrified according to the preset closing instruction, so that the target break isolation module self-electrified circuit, the target battery positive electrode connecting end and the target negative electrode connecting end of the target fault battery isolation circuit, and the communication line between the target battery negative electrode connecting end and the target positive electrode connecting end of the target fault battery isolation circuit are disconnected, and the target negative electrode connecting end and the target positive electrode connecting end of the target fault battery isolation circuit are connected.
9. The control method according to claim 8, characterized in that the method further comprises: when the output controller of the battery pack determines that the total voltage of the n series-connected fault battery isolation circuits of the battery pack does not fall into a target voltage numerical range set by an output interface of the output controller, the output controller sends a target voltage regulation request to a DCDC module of the battery pack, wherein the target voltage regulation request comprises the target voltage numerical range; and the DCDC module processes the total voltage according to the target voltage numerical range so that the total voltage falls into the target voltage numerical range.
10. A computer device is characterized by comprising a processor, a memory and a bus; The processor is connected with the memory through a bus, and the memory stores programs; The control method of claim 8 or 9 is implemented when the processor executes the program stored in the memory.

Description

Fault battery isolation circuit, battery pack, control method and computer equipment Technical Field The application belongs to the technical field of battery management, and particularly relates to a fault battery isolation circuit, a battery pack, a control method and computer equipment. Background Currently, many energy storage devices (e.g., energy storage power stations, home energy storage devices, industrial backup power sources, etc.) and power battery packs for electric vehicles typically form a battery pack from tens, hundreds, and even thousands of individual cells in series in order to achieve the desired voltage and capacity. The series-formed battery pack has a remarkable defect that when any battery in the battery pack is damaged due to internal short circuit, open circuit, serious aging and the like, current interruption or voltage abnormality of the whole circuit can be caused in the series circuit, so that the whole battery pack is invalid and cannot work normally. Disclosure of Invention The application aims to provide a fault battery isolation circuit, a battery pack, a control method and computer equipment, which realize physical and effective isolation of any fault battery in a battery pack formed by serially connected batteries and ensure that the normal operation of the whole battery pack is not influenced even if any battery breaks down. In a first aspect, the application provides a fault battery isolation circuit applied to connection between series batteries, comprising a battery positive electrode connection end b+, a battery negative electrode connection end B-, a disconnection isolation module F, a switch module K in an off state, and a negative electrode connection end B+ of a first adjacent battery in a series circuit of the series batteries, and a positive electrode connection end B+ of a second adjacent battery in the series circuit of the series batteries; the positive electrode connecting end b+ and the negative electrode connecting end B-of the battery are communicated through a one-way communication line of the circuit breaking isolation module F; The battery negative electrode connecting end B-is communicated with the positive electrode connecting end B+ through another communication line of the circuit breaking isolation module F; The power-on access end of the break isolation module F is connected with the negative electrode connection end B-, and the power-on output end of the break isolation module F is connected with the positive electrode connection end B+ after being controlled by one path of the switch module K; The other path of the input end of the switch module K is also independently connected with the negative electrode connecting end B; The circuit breaking isolation module F is provided with at least two independent communication lines, and the circuit breaking isolation module F can disconnect a self-energizing circuit and the two independent communication lines after being energized; The switch module K is provided with at least two paths of independent input ends, and when the switch module K receives a preset closing instruction, the break isolation module F can be electrified and connected with the negative electrode connecting end B-and the positive electrode connecting end B+. Optionally, the circuit breaking isolation module F is a multi-path fuse or a multi-path circuit breaker, and the switch module K is an intelligent multi-path switch; the multi-path fuse comprises a fuse with at least three independent input/output communication paths, wherein one independent input/output communication path is used for electrifying the fuse, or, The multi-path circuit breaker comprises at least three independent input/output communication lines, wherein one independent input/output communication line is used for electrifying the circuit breaker; the intelligent multi-way switch comprises at least two paths of normally-closed switches which are independently input. Optionally, the device also comprises a choke resistor R; the input end of the switch module K is connected with the negative electrode connecting end B-through the choke resistor R. Optionally, the battery B is isolated; The battery anode of the isolation battery B is communicated with the battery anode connecting end b+; and the battery cathode of the isolation battery B is communicated with the battery cathode connecting end B-. In a second aspect, the application provides a battery pack comprising n faulty battery isolation circuits according to the first aspect, an output controller, n being an integer greater than 1; Negative electrode connection end of 1 st fault battery isolation circuit Positive electrode connection end of isolation circuit with 2 nd fault batteryConnect, the n-1 th negative connection terminal of the fault battery isolation circuitPositive electrode connection end of isolation circuit with nth fault batteryThe 1 st positive electrode connecting end of the fault battery is