Ex-service power battery echelon utilization control system

Abstract

The utility model provides an ex-service power battery echelon utilization control system. The ex-service power battery echelon utilization control system comprises a control input module, a control module, a BMS management controller, a detection module, a charging module and a discharging module. The output end of the control input module is connected to the control module; the control module is in communication connection with the BMS management controller; the output end of the detection module is connected to the BMS management controller; the BMS management controller is used for receiving the state information output by the detection module after being awakened and executing an execution instruction output by the control module according to the state information, and the execution instruction comprises a charging operation instruction and a discharging operation instruction; the output end of the charging module is connected to the retired power battery through a charging control switch, and the control end of the charging control switch is connected to the BMS management controller; the input end of the discharging module is connected to the retired power battery through a discharging control switch; and echelon utilization of the retired power battery is facilitated.

Description

Technical Field

[0001] The utility model relates to a battery control system, in particular to a retired power battery recycling control system. Background Art

[0002] As the use of new energy vehicles becomes more and more common, the use of power batteries in new energy vehicles is increasing, and as a result, more retired power batteries are being updated. Although retired power batteries cannot meet the needs of automobiles, they can still be used in other scenarios as energy storage power sources.

[0003] However, in the prior art, it is difficult to obtain accurate information about retired power batteries during their cascade utilization. This is because retired power batteries are easily left alone after being replaced, and due to the influence of the battery's self-discharge factor, the power in the battery is gradually consumed. If its information needs to be understood, charging monitoring must be performed again. However, retired power batteries often do not have corresponding charging interfaces, which results in inaccurate information being obtained. The existing processing method generally involves returning the batteries to the factory, which is costly and extremely inconvenient to use.

[0004] Therefore, in order to solve this technical problem, it is urgent to propose a new technical means. Utility Model Content

[0005] In view of this, an object of the present invention is to provide a control system for the cascade utilization of retired power batteries, which can accurately detect the information of retired power batteries and perform corresponding charging and discharging operations according to the detection results, so as to facilitate the cascade utilization of retired power batteries and give full play to the value of retired power batteries. Moreover, the entire system has a simple structure and is easy to operate. It does not need to be returned to the factory for processing, so the use cost is low, and the retired power batteries can be adapted to different load requirements.

[0006] The utility model provides a retired power battery cascade utilization control system, including a control input module, a control module, a BMS management controller, a detection module, a charging module and a discharging module;

[0007] The control input module, whose output end is connected to the control module, is used to receive input instructions and transmit them to the control module;

[0008] The control module is connected to the BMS management controller for receiving input instructions from the control input module and providing wake-up power and execution instructions to the BMS management controller;

[0009] The detection module, whose output end is connected to the BMS management controller, is used to detect the status information of the retired power battery and output it to the BMS management controller;

[0010] The BMS management controller is used to receive the status information output by the detection module after being awakened and execute the execution instructions output by the control module according to the status information, and the execution instructions include charging operation instructions and discharging operation instructions;

[0011] The charging module, whose output end is connected to the retired power battery through a charging control switch, is used to input charging current to the retired power battery; the control end of the charging control switch is connected to the BMS management controller;

[0012] The discharge module has an input end connected to the retired power battery through a discharge control switch, and is used to input the current of the retired power battery to the load.

[0013] Furthermore, the control input module is a touch interface.

[0014] Further, the control module includes a controller, a battery, a DC-DC conversion circuit and an electronic switch;

[0015] The input end of the controller is connected to the control input module, the controller is in communication with the BMS management controller, the output end of the battery is connected to the input end of the DC-DC conversion circuit through an electronic switch, the output end of the DC-DC conversion circuit is connected to the BMS management controller, and the control input end of the electronic switch is connected to the controller.

[0016] Furthermore, the detection module includes a voltage detection circuit and a temperature sensor. The voltage detection circuit is used to detect the open circuit voltage of the retired power battery and output it to the BMS management controller. The temperature sensor is used to detect the temperature of the retired power battery and output it to the BMS management controller.

[0017] Furthermore, the charging module includes a rectifier circuit, a filter circuit and a charging DC conversion circuit;

[0018] The input end of the rectifier circuit is connected to the power grid, the output end of the rectifier circuit is connected to the input end of the filter circuit, the output end of the filter circuit is connected to the output end of the charging DC conversion circuit, and the output end of the charging DC conversion circuit is connected to the retired power battery through the charging control switch.

[0019] Furthermore, the charging control switch is a DC contactor or a DC relay.

[0020] Furthermore, the discharge module includes a discharge DC conversion circuit, an inverter, and an inverter controller;

[0021] The input end of the discharge DC conversion circuit is connected to the retired power battery through a discharge control switch, the output end of the discharge DC conversion circuit is connected to the input end of the inverter, the output end of the inverter supplies power to the AC load, the control output end of the inverter controller outputs a control instruction to the control input end of the inverter, and the inverter controller is communicatively connected to the controller.

[0022] Furthermore, the discharge control switch is a DC contactor or a DC relay.

[0023] The beneficial effects of the utility model are as follows: through the utility model, the information of retired power batteries can be accurately detected and corresponding charging and discharging operations can be performed according to the detection results, which is conducive to the cascade utilization of retired power batteries and gives full play to the value of retired power batteries. Moreover, the whole system has a simple structure and is easy to operate. There is no need to return the batteries to the factory for processing, so the use cost is low, and the retired power batteries can be adapted to different load requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 It is a schematic structural diagram of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below:

[0028] The utility model provides a retired power battery cascade utilization control system, including a control input module, a control module, a BMS management controller, a detection module, a charging module and a discharging module;

[0029] The control input module, whose output end is connected to the control module, is used to receive input instructions and transmit them to the control module;

[0030] The control module is connected to the BMS management controller for receiving input instructions from the control input module and providing wake-up power and execution instructions to the BMS management controller;

[0031] The detection module, whose output end is connected to the BMS management controller, is used to detect the status information of the retired power battery and output it to the BMS management controller;

[0032] The BMS management controller is used to receive the status information output by the detection module after being awakened and execute the execution instructions output by the control module according to the status information, and the execution instructions include charging operation instructions and discharging operation instructions;

[0033] The charging module, whose output end is connected to the retired power battery through a charging control switch, is used to input charging current to the retired power battery; the control end of the charging control switch is connected to the BMS management controller;

[0034] The discharge module, whose input end is connected to the retired power battery through a discharge control switch, is used to input the current of the retired power battery to the load; through the above structure, the information of the retired power battery can be accurately detected and corresponding charging and discharging operations can be performed according to the detection results, so as to facilitate the cascade utilization of the retired power batteries and give full play to the value of the retired power batteries. In addition, the entire system has a simple structure and is easy to operate. It does not need to be returned to the factory for processing, so the use cost is low, and the retired power batteries can be adapted to different load requirements.

[0035] In this embodiment, the control input module is a touch interface. This structure is convenient for inputting commands on the one hand, and for displaying the status information of retired power batteries fed back by the BMS management controller received by the controller on the other hand, thereby facilitating cascade utilization configuration according to the status information. Of course, a combination of an existing display and a keyboard can also be used as an input control module, and an existing mobile terminal, such as a tablet computer or a smart phone, can also be used to input commands to the control module and receive information fed back by the control module through a Bluetooth module or a WiFi module.

[0036] In this embodiment, the control module includes a controller, a battery, a DC-DC conversion circuit and an electronic switch;

[0037] The input end of the controller is connected to the control input module, the controller is communicatively connected to the BMS management controller, the output end of the battery is connected to the input end of the DC-DC conversion circuit through an electronic switch, the output end of the DC-DC conversion circuit is connected to the BMS management controller, and the control input end of the electronic switch is connected to the controller, wherein the controller can adopt an existing single-chip microcomputer, such as an STM32 series single-chip microcomputer, the battery adopts an existing lithium battery, and the DC-DC conversion circuit is used to boost or buck the voltage output by the lithium battery to meet the voltage requirements of the BMS management controller and the detection module. Its circuit structure adopts the existing circuit, which will not be repeated here, and the electronic switch is implemented by an existing triode or MOS tube.

[0038] In this embodiment, the detection module includes a voltage detection circuit and a temperature sensor. The voltage detection circuit is used to detect the open circuit voltage of the retired power battery and output it to the BMS management controller. The temperature sensor is used to detect the temperature of the retired power battery and output it to the BMS management controller. The voltage monitoring circuit adopts the existing battery open circuit voltage monitoring circuit. The charge state and the charge and discharge state of the battery can be judged according to the voltage information. The temperature sensor is used to obtain the real-time temperature information of the retired power battery. The voltage and temperature of the power battery can also be used for charging and discharging control. For example, if the voltage is lower than the set value or the temperature is higher than the set value, the charging or discharging of the retired power battery is stopped.

[0039] In this embodiment, the charging module includes a rectifier circuit, a filter circuit and a charging DC conversion circuit;

[0040] The input end of the rectifier circuit is connected to the power grid, the output end of the rectifier circuit is connected to the input end of the filter circuit, the output end of the filter circuit is connected to the output end of the charging DC conversion circuit, and the output end of the charging DC conversion circuit is connected to the retired power battery through the charging control switch, wherein the rectifier circuit adopts an existing full-bridge rectifier circuit composed of diodes or a full-bridge controllable rectifier circuit composed of thyristors, the filter circuit adopts an existing passive filter circuit, and the charging DC conversion circuit adopts an existing DC-DC conversion circuit.

[0041] Wherein: the charging control switch is a DC contactor or a DC relay, which is easy to control and has a fast response speed.

[0042] In this embodiment, the discharge module includes a discharge DC conversion circuit, an inverter, and an inverter controller;

[0043] The input end of the discharge DC conversion circuit is connected to the retired power battery through a discharge control switch, the output end of the discharge DC conversion circuit is connected to the input end of the inverter, the output end of the inverter supplies power to the AC load, the control output end of the inverter controller outputs a control instruction to the control input end of the inverter, the inverter controller is communicatively connected to the controller, the discharge DC conversion circuit adopts an existing DC-DC conversion circuit, and the corresponding circuit can be selected according to actual needs. The inverter controller is used to output PWM signals with different duty cycles to the inverter, thereby realizing inversion of different voltages. Of course, for DC loads, a rectifier circuit and a corresponding DC-DC conversion circuit can be added after the inverter.

[0044] Wherein: the discharge control switch is a DC contactor or a DC relay, which is easy to control and has a fast response speed.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A control system for the recycling of retired power batteries, characterized in that: It includes a control input module, a control module, a BMS management controller, a detection module, a charging module and a discharging module; The control input module, whose output end is connected to the control module, is used to receive input instructions and transmit them to the control module; The control module is connected to the BMS management controller for receiving input instructions from the control input module and providing wake-up power and execution instructions to the BMS management controller; The detection module, whose output end is connected to the BMS management controller, is used to detect the status information of the retired power battery and output it to the BMS management controller; The BMS management controller is used to receive the status information output by the detection module after being awakened and execute the execution instructions output by the control module according to the status information, and the execution instructions include charging operation instructions and discharging operation instructions; The charging module, whose output end is connected to the retired power battery through a charging control switch, is used to input charging current to the retired power battery; the control end of the charging control switch is connected to the BMS management controller; The discharge module has an input end connected to the retired power battery through a discharge control switch, and is used to input the current of the retired power battery to the load.

2. The retired power battery recycling control system according to claim 1 is characterized in that: The control input module is a touch interface.

3. The retired power battery recycling control system according to claim 1 is characterized in that: The control module includes a controller, a battery, a DC-DC conversion circuit and an electronic switch; The input end of the controller is connected to the control input module, the controller is in communication with the BMS management controller, the output end of the battery is connected to the input end of the DC-DC conversion circuit through an electronic switch, the output end of the DC-DC conversion circuit is connected to the BMS management controller, and the control input end of the electronic switch is connected to the controller.

4. The retired power battery recycling control system according to claim 1 is characterized in that: The detection module includes a voltage detection circuit and a temperature sensor. The voltage detection circuit is used to detect the open circuit voltage of the retired power battery and output it to the BMS management controller. The temperature sensor is used to detect the temperature of the retired power battery and output it to the BMS management controller.

5. The retired power battery recycling control system according to claim 1 is characterized in that: The charging module includes a rectifier circuit, a filter circuit and a charging DC conversion circuit; The input end of the rectifier circuit is connected to the power grid, the output end of the rectifier circuit is connected to the input end of the filter circuit, the output end of the filter circuit is connected to the output end of the charging DC conversion circuit, and the output end of the charging DC conversion circuit is connected to the retired power battery through the charging control switch.

6. The retired power battery recycling control system according to claim 1 or 5, characterized in that: The charging control switch is a DC contactor or a DC relay.

7. The retired power battery recycling control system according to claim 1, characterized in that: The discharge module includes a discharge DC conversion circuit, an inverter, and an inverter controller; The input end of the discharge DC conversion circuit is connected to the retired power battery through a discharge control switch, the output end of the discharge DC conversion circuit is connected to the input end of the inverter, the output end of the inverter supplies power to the AC load, the control output end of the inverter controller outputs a control instruction to the control input end of the inverter, and the inverter controller is communicatively connected to the controller.

8. The retired power battery recycling control system according to claim 1 or 7, characterized in that: The discharge control switch is a DC contactor or a DC relay.

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