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CN-224233381-U - High-voltage energy storage battery system protection circuit and battery system

CN224233381UCN 224233381 UCN224233381 UCN 224233381UCN-224233381-U

Abstract

The utility model discloses a high-voltage energy storage battery system protection circuit and a battery system, wherein the circuit comprises a controller, a plurality of charging modules and a plurality of discharging modules, wherein the controller is connected with the plurality of charging modules and the plurality of discharging modules, the charging modules are connected with a battery and a peripheral port, the discharging modules are connected with the battery and the peripheral port, the discharging modules are connected with the charging modules in parallel, the number of the charging modules and the discharging modules is equal to that of the battery, the peripheral port is connected with a power supply or a load, and the controller is used for detecting the residual electric quantity of the battery and controlling the charging modules connected with the battery to be disconnected when the residual electric quantity is detected to be larger than the preset electric quantity. When the battery is fully charged or the load is not controlled, the controller can control the charging module to be disconnected, so that the safety risk of the system caused by overcharging is avoided, and when the discharging is required to be immediately converted, the discharging is directly output through the discharging module, thereby ensuring the safety and avoiding downtime of the system.

Inventors

  • HUANG JINGYA
  • ZHANG QIANGWEI
  • ZHONG LEI

Assignees

  • 杭州微慕科技有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (10)

  1. 1. The high-voltage energy storage battery system protection circuit is characterized by comprising a controller, a plurality of charging modules and a plurality of discharging modules; The controller is connected with a plurality of charging modules and a plurality of discharging modules, the charging modules are connected with a battery and peripheral ports, the discharging modules are connected with the battery and the peripheral ports, the discharging modules are connected with the charging modules in parallel, the number of the charging modules and the discharging modules is equal to that of the battery, and the peripheral ports are connected with a power supply or a load; the charging module is used for controlling the power supply to charge the battery when the peripheral port is connected with the power supply; The controller is used for detecting the residual electric quantity of the battery, and controlling the charging module connected with the battery to be disconnected when the residual electric quantity is detected to be larger than the preset electric quantity; and the discharging module is used for controlling the battery to supply power to the load when the peripheral port is connected to the load.
  2. 2. The high voltage energy storage battery system protection circuit of claim 1, further comprising a protection module and a shunt module; The protection module is connected with the peripheral interface, the charging module, the discharging module and the battery, and the shunt module is connected with the peripheral interface and the battery; The protection module is used for disconnecting the connection between the battery and the peripheral port when overcurrent is detected; The shunt module is used for controlling the charging current of the charging module.
  3. 3. The high voltage energy storage battery system protection circuit of claim 1, wherein the controller is further configured to control the discharge module to open when the load fault is detected.
  4. 4. The high voltage energy storage battery system protection circuit of claim 1, wherein the controller is configured to request a preset voltage to the power supply for charging and reduce a charging current by a preset number of times, so that the battery is charged with the preset current; The controller is also used for eliminating the pressure difference between the high-voltage battery and the residual battery through discharging balance when the battery is charged with preset current.
  5. 5. The high-voltage storage battery system protection circuit of claim 1, wherein, And the controller is used for reducing the charging current of the power supply when the charging module of one battery is disconnected, and continuously charging the rest batteries until the rest electric quantity of all the batteries is larger than the preset electric quantity.
  6. 6. The high voltage energy storage battery system protection circuit of claim 2, wherein the discharging module comprises a first diode and a first contactor; The anode of the first diode is connected with the anode of the battery and the discharging module, the cathode of the first diode is connected with the first port of the first contactor and the discharging module, and the second port of the first contactor is connected with the anode of the peripheral port and the discharging module.
  7. 7. The high voltage energy storage battery system protection circuit of claim 6, wherein said charging module comprises a second diode and a second contactor; The first end of the second contactor is connected with the anode of the first diode and the anode of the battery, the second end of the second contactor is connected with the cathode of the first diode, the cathode of the second diode and the first end of the first contactor, and the anode of the second diode is connected with the second end of the first contactor and the anode of the peripheral port.
  8. 8. The high voltage energy storage battery system protection circuit of claim 7, wherein the protection module comprises a fuse, a first resistor, a third contactor, and a circuit breaker; The positive pole of battery is connected to the one end of fuse, the other end of fuse is connected the positive pole of first diode the first end of second contactor, the one end of first resistance, the other end of first resistance is connected the first end of third contactor, the second end of third contactor is connected the second end of first contactor the positive pole of second diode with the first incoming line end of circuit breaker, the first outgoing line end of circuit breaker is connected the second outgoing line end of circuit breaker, the second incoming line end of circuit breaker is connected the third incoming line end of circuit breaker, the third outgoing line end of circuit breaker is connected the positive pole of peripheral hardware port, the fourth incoming line end of circuit breaker is connected the reposition of redundant personnel module, the fourth outgoing line end of circuit breaker is connected the negative pole of peripheral hardware port.
  9. 9. The high voltage energy storage battery system protection circuit of claim 8, wherein the shunt module comprises a shunt and a fourth contactor; One end of the current divider is connected with the cathode of the battery, the other end of the current divider is connected with the first port of the fourth contactor, and the second port of the fourth contactor is connected with the fourth wire inlet end of the circuit breaker.
  10. 10. A battery system comprising the high voltage energy storage battery system protection circuit of any one of claims 1-9.

Description

High-voltage energy storage battery system protection circuit and battery system Technical Field The utility model relates to the technical field of battery control, in particular to a high-voltage energy storage battery system protection circuit and a battery system. Background The current control of the charge and discharge loops is single, for single-cluster batteries, a contactor is arranged in each of the positive loop and the negative loop, the protection function of the charge and discharge modes cannot be distinguished in the normal operation process, so that the system is down caused once one contactor is disconnected, the stability of the system is very serious, the floating charge balance logic of the charge end of the single-cluster battery is not friendly, the scheme needs to reduce the whole charge voltage, so that the consistency of the charge end of the system and the control logic of charge current limitation are ensured, and for a multi-cluster battery cascading system, the problem of reduced precision is caused for SOC uploading of a stack-level system and the problem of reduction in charge and discharge capacity is solved by adopting the method. Disclosure of utility model The utility model mainly aims to provide a high-voltage energy storage battery system protection circuit and a battery system, and aims to solve the problem that the existing charging circuit is single and the charging and discharging modes cannot be distinguished. In order to achieve the above purpose, the high-voltage energy storage battery system protection circuit provided by the utility model comprises a controller, a plurality of charging modules and a plurality of discharging modules; The controller is connected with a plurality of charging modules and a plurality of discharging modules, the charging modules are connected with a battery and peripheral ports, the discharging modules are connected with the battery and the peripheral ports, the discharging modules are connected with the charging modules in parallel, the number of the charging modules and the discharging modules is equal to that of the battery, and the peripheral ports are connected with a power supply or a load; the charging module is used for controlling the power supply to charge the battery when the peripheral port is connected with the power supply; The controller is used for detecting the residual electric quantity of the battery, and controlling the charging module connected with the battery to be disconnected when the residual electric quantity is detected to be larger than the preset electric quantity; and the discharging module is used for controlling the battery to supply power to the load when the peripheral port is connected to the load. In one embodiment, the circuit further comprises a protection module and a shunt module; The protection module is connected with the peripheral interface, the charging module, the discharging module and the battery, and the shunt module is connected with the peripheral interface and the battery; The protection module is used for disconnecting the connection between the battery and the peripheral port when overcurrent is detected; The shunt module is used for controlling the charging current of the charging module. In an embodiment, the controller is further configured to control the discharge module to be turned off when the load fault is detected. In an embodiment, the controller is configured to request a preset voltage to the power supply to perform charging, and reduce the charging current by a preset number of times, so that the battery is charged with the preset current; The controller is also used for eliminating the pressure difference between the high-voltage battery and the residual battery through discharging balance when the battery is charged with preset current. In an embodiment, the controller is configured to reduce the charging current of the power supply when the charging module of one of the batteries is disconnected, and continue to charge the remaining batteries until the remaining power of all the batteries is greater than the preset power. In one embodiment, the discharge module comprises a first diode and a first contactor; The anode of the first diode is connected with the anode of the battery and the discharging module, the cathode of the first diode is connected with the first port of the first contactor and the discharging module, and the second port of the first contactor is connected with the anode of the peripheral port and the discharging module. In one embodiment, the charging module comprises a second diode and a second contactor; The first end of the second contactor is connected with the anode of the first diode and the anode of the battery, the second end of the second contactor is connected with the cathode of the first diode, the cathode of the second diode and the first end of the first contactor, and the anode of the second diode is connected with the second end