Control circuit of high-voltage battery pack and electronic equipment

Abstract

The utility model belongs to the technical field of energy storage, and discloses a control circuit of a high-voltage battery pack and electronic equipment, the circuit comprises a power supply module, a power supply module, an acquisition module, a control module and a charging and discharging module; the power supply module is used for providing a first voltage signal for a control circuit of the high-voltage battery pack and outputting the first voltage signal to the power supply module; the power supply module is used for converting the first voltage signal into a second voltage signal and outputting the second voltage signal to the acquisition module; the acquisition module is used for acquiring various parameter information of the battery pack and outputting the acquired parameter information to the control module; the control module detects the collected parameter information and outputs a detection result to the charging and discharging module; and the charging and discharging module charges and discharges the battery pack according to the received detection result. The circuit provided by the utility model ensures safe and stable operation of the high-voltage battery pack, and prolongs the service life of the battery pack.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and particularly relates to a control circuit and an electronic device for a high-voltage battery pack. Background Art

[0002] Most of the existing three-phase photovoltaic and energy storage hybrid inverters use high-voltage battery packs for energy storage. However, the existing high-voltage battery packs have too high voltage and temperature, which are prone to safety accidents. And when the insulation of the circuit of the high-voltage battery pack fails, if the output of the high-voltage control box is not disconnected in time, it will even affect personal safety.

[0003] In view of this, how to effectively control the safe operation of the high-voltage battery pack is a technical problem to be solved urgently. Summary of the Utility Model

[0004] In order to solve the above technical problem that the voltage and temperature of the high-voltage battery pack are too high and prone to safety accidents, the utility model provides a control circuit and an electronic device for a high-voltage battery pack.

[0005] In the first aspect, the utility model provides a control circuit for a high-voltage battery pack, including a power supply module, a power module, a collection module, a control module, and a charge and discharge module;

[0006] The power supply module is connected to the power module. The power supply module is used to provide a first voltage signal for the control circuit of the high-voltage battery pack and output the first voltage signal to the power module;

[0007] The power module is connected to the collection module. The power module is used to convert the first voltage signal into a second voltage signal and output the second voltage signal to the collection module;

[0008] The collection module is connected to the control module. The collection module is used to collect various parameter information of the battery pack and output the collected various parameter information to the control module;

[0009] The control module is connected to the charge and discharge module. The control module detects the various parameter information collected and outputs the detection result to the charge and discharge module;

[0010] The charge and discharge module charges and discharges the battery pack according to the received detection result.

[0011] Further, the power supply module includes a battery pack, the power module includes a power converter, and the charge and discharge module includes a first contactor, a second contactor, and a third contactor;

[0012] The positive electrode of the battery pack is respectively connected to the first contactor, the second contactor and the third contactor, and the negative electrode of the battery pack is respectively connected to the negative terminal of the high-voltage control box and the negative input terminal of the power converter.

[0013] Further, the power supply module further includes a fourth contactor and a reset switch, and the control module includes a battery main control board;

[0014] The fourth contactor is respectively connected to the positive electrode of the battery pack, the reset switch and the positive input terminal of the power converter, and the output terminal of the power converter is connected to the battery main control board.

[0015] Further, the charge and discharge module further includes a first anti-reverse diode, and the control module further includes a fuse;

[0016] One end of the fuse is connected to the positive electrode of the battery pack, the other end of the fuse is connected to the first contact point of the first contactor, and the first contact point of the first contactor is connected to the positive electrode of the first anti-reverse diode;

[0017] The first contact point of the second contactor is connected to the negative electrode of the first anti-reverse diode, and the second contact point of the second contactor is connected to the positive electrode of the high-voltage control box.

[0018] Further, the charge and discharge module further includes a second anti-reverse diode;

[0019] The positive electrode of the high-voltage control box is connected to the second contact point of the second contactor, and the second contact point of the second contactor is connected to the positive electrode of the second anti-reverse diode, and the negative electrode of the second anti-reverse diode is connected to the second contact point of the first contactor;

[0020] The first contact point of the first contactor is connected to one end of the fuse, and the other end of the fuse is connected to the positive electrode of the battery pack.

[0021] Further, the control circuit of the high-voltage battery pack further includes a current monitoring module, and the current monitoring module is respectively connected to the power supply module and the control module;

[0022] The current monitoring module is used to detect the current signal during the charge and discharge of the battery pack, and output the detected current signal to the control module;

[0023] The control module controls the charge and discharge of the battery pack according to the detected current signal.

[0024] Further, the current monitoring module includes a high-voltage monitoring board and a shunt, and the control module further includes a circuit breaker;

[0025] One end of the high-voltage monitoring board is connected to the negative electrode of the battery pack, and the other end of the high-voltage monitoring board is connected to the battery main control board;

[0026] One end of the shunt is respectively connected to the negative electrode input ends of the circuit breaker and the power converter, and the other end of the shunt is respectively connected to the negative electrodes of the high-voltage monitoring board and the high-voltage control box.

[0027] Further, the control circuit of the high-voltage battery pack further includes an insulation detection module, and the insulation detection module is respectively connected to the power module and the control module;

[0028] The insulation detection module is used to detect the insulation of the control circuit of the high-voltage battery pack and output the detected insulation to the control module;

[0029] The control module controls the on-off of the fourth contactor in the power module according to the detected insulation.

[0030] Further, the battery main control board includes a daisy-chain communication interface, an RS485 communication interface, and a CAN communication interface;

[0031] The daisy-chain communication interface is communicatively connected to the battery pack, and the RS485 communication interface and the CAN communication interface are respectively connected to the external load of the high-voltage control box.

[0032] In a second aspect, the present invention provides an electronic device, including a device main body and a control circuit of a high-voltage battery pack as described in any one of the above first aspects provided on the device main body.

[0033] Compared with the prior art, the control circuit of the high-voltage battery pack provided by the present invention detects various parameter information collected by the control module and outputs the detection result to the charge and discharge module; the charge and discharge module charges and discharges the battery pack according to the received detection result, ensuring the safe and stable operation of the high-voltage battery pack and improving the service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the frame structure of a control circuit of a high-voltage battery pack provided by an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of an operating circuit of a high-voltage battery pack provided by an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of a control circuit of a high-voltage battery pack provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0038] To make the description of the present disclosure more detailed and complete, the following provides an illustrative description of the implementation modes and specific embodiments of the present utility model; however, this is not the only form for implementing or applying the specific embodiments of the present utility model. The implementation modes cover the features of multiple specific embodiments and the method steps and their sequences for constructing and operating these specific embodiments. However, other specific embodiments can also be used to achieve the same or equivalent functions and step sequences. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0039] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0040] In the description of the embodiments of the present utility model, unless otherwise specified, " / " means "or". For example, A / B can represent A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more, and other quantifiers are similar. It should be understood that the preferred embodiments described herein are only used to explain and illustrate the present utility model and are not used to limit the present utility model, and in the case of no conflict, the embodiments of this application and the features in the embodiments can be combined with each other.

[0041] To solve the technical problem that the voltage and temperature of the existing high-voltage battery pack are too high and safety accidents are likely to occur, the present utility model provides a control circuit for a high-voltage battery pack. Please refer to Figures 1-3 , Figure 1 which is a schematic diagram of the framework structure of a control circuit for a high-voltage battery pack provided by an embodiment of the present utility model, Figure 2 and which is a schematic diagram of the structure of an operating circuit for a high-voltage battery pack provided by an embodiment of the present utility model; Figure 3The figure is a schematic structural diagram of a control circuit for a high-voltage battery pack provided by an embodiment of the present utility model. The control circuit of the high-voltage battery pack includes a power supply module, a power module, a collection module, a control module, and a charge and discharge module. The power supply module is connected to the power module. The power supply module is used to provide a first voltage signal for the control circuit of the high-voltage battery pack and output the first voltage signal to the power module. The power module is connected to the collection module. The power module is used to convert the first voltage signal into a second voltage signal and output the second voltage signal to the collection module. The collection module is connected to the control module. The collection module is used to collect various parameter information of the battery pack and output the collected various parameter information to the control module. The control module is connected to the charge and discharge module. The control module detects the various parameter information collected and outputs the detection result to the charge and discharge module. The charge and discharge module charges and discharges the battery pack according to the received detection result. The circuit provided by the embodiment of the present utility model enables the high-voltage battery pack to operate safely and stably, and improves the service life of the battery pack.

[0042] As a further preference, the power supply module includes a battery pack, the power module includes a power converter, and the charge and discharge module includes a first contactor KM1, a second contactor KM2, and a third contactor KM3. The positive electrode BAT+ of the battery pack is respectively connected to the first contactor KM1, the second contactor KM2, and the third contactor KM3. The negative electrode BAT- of the battery pack is respectively connected to the negative terminal P- of the high-voltage control box and the negative input terminal VIN- of the power converter. Among them, the first contactor KM1 is a charging contactor, the second contactor KM2 is a discharging contactor, the third contactor KM3 is a pre-charging contactor, and the power converter is a DC-DC power converter.

[0043] Specifically, in the start-up stage of the control circuit of the high-voltage battery pack in the embodiment of the present utility model, first, the circuit breaker QF and the shunt trip MX are closed. The negative electrode BAT- of the battery pack is connected to the negative terminal P- of the high-voltage control box and the negative input terminal Vin- of the DC-DC power supply. The positive electrode BAT+ of the battery pack is connected to the first contact point A1 of the first contactor KM1, the first contact point A1 of the second contactor KM2, and the first contact point A1 of the third contactor KM3.

[0044] As a further preference, the power module further includes a fourth contactor KM4 and a reset switch SB, and the control module includes a battery main control board BCU. The fourth contactor KM4 is respectively connected to the positive electrode BAT+ of the battery pack, the reset switch SB, and the positive input terminal VIN+ of the power converter. The output terminal VOUT of the power converter is connected to the battery main control board BCU.

[0045] Specifically, in the embodiment of the present utility model, after pressing the self - reset button SB for 5 s during the startup phase of the control circuit of the high - voltage battery pack, the main contacts (A1, A2) of the fourth contactor KM4 are conducted, and the positive pole BAT+ of the battery pack is connected to the positive - pole input terminal VIN+ of the power converter for power supply. The power converter converts the voltage signal of 150 - 1500 VDC into a voltage signal of 24 VDC and outputs the 24 - VDC voltage signal to the battery main control board BCU. The battery main control board BCU performs voltage detection, insulation detection, and temperature detection between the positive and negative poles of the battery, and communicates with the battery - group voltage and temperature acquisition module BMU to obtain the number of battery groups and the voltage and temperature data of each battery cell. If the insulation detection is normal and the voltage does not exceed the upper - limit voltage, the battery main control board BCU controls the electromagnetic coil of the fourth contactor KM4 to be powered, the main contacts (A1, A2) of the fourth contactor KM4 close, the battery main control board BCU powers the indicator light of the reset switch SB, and the LED light is lit. At this time, the startup of the high - voltage box is completed. If it is detected that the insulation detection is abnormal or the voltage value of the detected voltage signal exceeds the upper - limit voltage value, the battery main control board BCU energizes the terminal of the release MX. At this time, the release MX trips and drives the circuit breaker QF to trip together to cut off the power supply. It needs to be detected by professionals before it can be started again. The charge - discharge control after startup is controlled according to specific control requirements.

[0046] After the control circuit of the high - voltage battery pack starts up normally, it constantly collects the voltage at the positive and negative poles of the battery, the temperature at the positive and negative poles of the battery and the wiring terminals of the high - voltage control box, and the current on the shunt. When the collected voltage and temperature are both within the configured range, first, the battery main control board BCU controls the first contactor KM1 and the third contactor KM3 to be powered on. The main contacts of the first contactor KM1 and the third contactor KM3 are connected, and the pre - charge resistor R is conducted. After reaching the pre - charge set time, it then controls the second contactor KM2 to be powered on, and the entire main circuit is conducted. If it is detected that the voltage is lower than the discharge cut - off voltage value of the battery pack, the battery main control board BCU controls the second contactor KM2 to be powered off to stop discharging, and it is necessary to charge or wait until the voltage recovers to the discharge - protection recovery voltage value before the second contactor KM2 can be restarted. If it is detected that the voltage is higher than the charge cut - off voltage value of the battery pack, the battery main control board BCU controls the first contactor KM1 to be disconnected to stop charging, and it is necessary to discharge or wait until the voltage recovers to the charge - protection recovery voltage value before the first contactor KM1 can be restarted.

[0047] When the battery charge and discharge module needs to stop charging and discharging, press and release the reset switch SB. When the battery main control board BCU detects a closure of the auxiliary contact (3, 4) of the reset switch SB once, it controls the first contactor KM1, the second contactor KM2, and the third contactor KM3 to cut off the power supply. When the battery main control board BCU detects that the auxiliary contacts (1, 2) of the first contactor KM1, the second contactor KM2, and the third contactor KM3 are all in the off state, the battery main control board BCU controls the electromagnetic coil (3, 4) of the fourth contactor KM4 to cut off the power supply, and the main contacts (A1, A2) of the fourth contactor KM4 are disconnected. The reset switch SB goes out naturally after power-off, trips the shunt trip MX, and manually operates the circuit breaker QF.

[0048] As a further preference, the charge and discharge module further includes a first anti-reverse diode D1, and the control module further includes a fuse FU; one end of the fuse FU is connected to the positive pole BAT+ of the battery pack, the other end of the fuse FU is connected to the first contact point A1 of the first contactor KM1, and the first contact point A1 of the first contactor KM1 is connected to the positive pole of the first anti-reverse diode D1; the first contact point A1 of the second contactor KM2 is connected to the negative pole of the first anti-reverse diode D1, and the second contact point A2 of the second contactor KM2 is connected to the positive pole P+ of the high-voltage control box. Specifically, in the embodiment of the present invention, during the normal charging process, if the voltage between the battery packs is higher than the charging cut-off voltage, the battery main control board BCU controls the electromagnetic coil (X1, X2) of the first contactor KM1 to disconnect, and the main contacts (A1, A2) of the first contactor KM1 are disconnected. When the first contactor KM1 needs to be restarted after disconnection, if the high-voltage monitoring board HVM detects that the discharge current of the shunt FL exceeds 1 A, at this time, the current of the positive pole BAT+ of the battery pack passes through the fuse FU, flows from the first contact point A1 end of the first contactor KM1 through the anti-reverse diode D1 to the main contacts (A1, A2) of the second contactor KM2, and finally reaches the positive pole P+ of the output high-voltage control box, then the battery main control board BCU controls the electromagnetic coil (X1, X2) of the first contactor KM1 to be energized, and the main contacts (A1, A2) of the first contactor (KM1) are connected, restoring the normal circuit connection.

[0049] As a further preference, the charge and discharge module further includes a second anti-reverse diode D2; the positive pole P+ of the high-voltage control box is connected to the second contact point A2 of the second contactor KM2, and the second contact point A2 of the second contactor KM2 is connected to the positive pole of the second anti-reverse diode D2, and the negative pole of the second anti-reverse diode D2 is connected to the second contact point A2 of the first contactor KM2; the first contact point A1 of the first contactor KM1 is connected to the fuse FU, and the fuse FU is connected to the positive pole BAT+ of the battery pack. Specifically, in the embodiment of the present invention, during the normal discharge process, if the voltage between the battery packs is lower than the discharge cut-off voltage, the battery main control board BCU controls the electromagnetic coil (X1, X2) of the second contactor KM2 to be powered off, and the main contacts (A1, A2) of the second contactor KM2 are disconnected. If the high-voltage monitoring board HVM detects that the charging current of the shunt FL exceeds 1A, when the second contactor KM2 needs to be restarted after being disconnected, the current input from the positive pole P+ of the high-voltage control box flows from the second contact point A2 end of the second contactor KM2 through the anti-reverse diode D2 to the main contacts (A2, A1) of the first contactor KM1, and finally flows through the fuse FU to the positive pole BAT+ of the battery pack, then the battery main control board BCU controls the electromagnetic coil (X1, X2) of the second contactor KM2 to be powered on, and the main contacts (A1, A2) of the second contactor KM2 are connected to restore the normal circuit.

[0050] As a further preference, the control circuit of the high-voltage battery pack further includes a current monitoring module, and the current monitoring module is respectively connected to the power supply module and the control module; the current monitoring module is used to detect the current signal during the charge and discharge of the battery pack, and output the detected current signal to the control module; the control module controls the charge and discharge of the battery pack according to the detected current signal. Specifically, in the embodiment of the present invention, during the normal charge and discharge process of the battery pack, if the current monitoring module monitors that the current exceeds the protection value, the control module controls the charge and discharge module of the battery pack to be disconnected.

[0051] As a further preference, the current monitoring module includes a high-voltage monitoring board HVM and a shunt FL, and the control module further includes a circuit breaker QF; one end of the high-voltage monitoring board HVM is connected to the negative pole BAT- of the battery pack, and the other end of the high-voltage monitoring board HVM is connected to the battery main control board BCU; one end of the shunt FL is respectively connected to the circuit breaker QF and the negative input terminal VIN- of the power converter, and the other end of the shunt FL is respectively connected to the high-voltage monitoring board HVM and the negative pole P- of the high-voltage control box. Specifically, in the embodiment of the present invention, during the normal charge and discharge process of the battery pack, if the high-voltage monitoring board HVM monitors that the current of the shunt FL exceeds the protection value, the battery main control board BCU controls the electromagnetic coils and main contacts of the first contactor KM1 and the second contactor KM2 to disconnect, and controls the display screen to display overcurrent protection.

[0052] In addition, during the normal charge and discharge process of the battery pack, if the high-voltage monitoring board HVM monitors that the ambient temperature of the positive and negative poles of the battery or the high-voltage control box is higher than the upper limit value of the protection temperature or lower than the lower limit value of the protection temperature, the battery main control board BCU disconnects the electromagnetic coils and main contacts of the first contactor KM1 and the second contactor KM2. When the ambient temperature of the positive and negative poles of the battery pack and the high-voltage control box returns to below the upper recovery value of the protection temperature or above the lower protection value of the protection temperature, the battery main control board BCU controls the electromagnetic coils and main contacts of the first contactor KM1 and the second contactor KM2 to connect and resume the normal charge and discharge process.

[0053] As a further preference, the control circuit of the high-voltage battery pack further includes an insulation detection module, and the insulation detection module is respectively connected to the power module and the control module; the insulation detection module is used to detect the insulation of the control circuit of the high-voltage battery pack and output the detected insulation to the control module; the control module controls the on-off of the fourth contactor KM4 in the power module according to the detected insulation. Specifically, in the embodiment of the present invention, an insulation detection module is configured to perform insulation detection on the control circuit of the entire high-voltage battery pack. When insulation failure occurs, the fourth contactor KM4 is promptly disconnected to ensure personal safety.

[0054] As a further preference, the battery main control board includes a daisy chain communication interface, an RS485 communication interface, and a CAN communication interface; the daisy chain communication interface is communicatively connected to the battery pack, and the RS485 communication interface and the CAN communication interface are respectively connected to external loads of the high-voltage control box. Specifically, in the embodiment of the present invention, the high-voltage control box supports communication with a lithium battery pack with the function of a battery voltage and temperature acquisition board, and can communicate with the battery pack through the daisy chain interface to obtain the cell voltage and temperature of a single lithium battery pack in real time, so as to achieve the protection of a single lithium battery pack. In addition, the high-voltage control box in the embodiment of the present invention supports communication with an inverter, and communicates with the inverter through the RS485 / CAN communication interface to share the operating state, power state, and voltage and current data of the charge and discharge requests of the high-voltage control box, so as to better achieve the battery pack charge and discharge protection function.

[0055] Based on the above control circuit of the high-voltage battery pack, an embodiment of the present application further provides an electronic device, which includes a device main body and the control circuit of the high-voltage battery pack as described above provided in the device main body.

[0056] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0057] The above embodiments only express the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A control circuit for a high-voltage battery pack, characterized in that, It includes a power supply module, a power module, a collection module, a control module, and a charge and discharge module; The power supply module is connected to the power module. The power supply module is used to provide a first voltage signal to the control circuit of the high-voltage battery pack and output the first voltage signal to the power module; The power module is connected to the collection module. The power module is used to convert the first voltage signal into a second voltage signal and output the second voltage signal to the collection module; The collection module is connected to the control module. The collection module is used to collect various parameter information of the battery pack and output the collected various parameter information to the control module; The control module is connected to the charge and discharge module. The control module detects the various parameter information collected and outputs the detection result to the charge and discharge module; The charge and discharge module charges and discharges the battery pack according to the received detection result.

2. The control circuit of the high-voltage battery pack according to claim 1, wherein The power supply module includes a battery pack, the power module includes a power converter, and the charge and discharge module includes a first contactor, a second contactor, and a third contactor; The positive pole of the battery pack is respectively connected to the first contactor, the second contactor, and the third contactor. The negative pole of the battery pack is respectively connected to the negative terminal of the high-voltage control box and the negative input terminal of the power converter.

3. The control circuit of the high-voltage battery pack according to claim 2, wherein The power module further includes a fourth contactor and a reset switch, and the control module includes a battery main control board; The fourth contactor is respectively connected to the positive pole of the battery pack, the reset switch, and the positive input terminal of the power converter. The output terminal of the power converter is connected to the battery main control board.

4. The control circuit of the high-voltage battery pack according to claim 3, wherein The charge and discharge module further includes a first anti-reverse diode, and the control module further includes a fuse; One end of the fuse is connected to the positive pole of the battery pack, the other end of the fuse is connected to the first contact point of the first contactor, and the first contact point of the first contactor is connected to the positive pole of the first anti-reverse diode; The first contact point of the second contactor is connected to the negative pole of the first anti-reverse diode, and the second contact point of the second contactor is connected to the positive pole of the high-voltage control box.

5. The control circuit of the high-voltage battery pack according to claim 3, characterized in that, The charge and discharge module further includes a second anti-reverse diode; The positive pole of the high-voltage control box is connected to the second contact point of the second contactor, and the second contact point of the second contactor is connected to the positive pole of the second anti-reverse diode. The negative pole of the second anti-reverse diode is connected to the second contact point of the first contactor; The first contact point of the first contactor is connected to one end of the fuse, and the other end of the fuse is connected to the positive pole of the battery pack.

6. The control circuit of the high-voltage battery pack according to claim 5, wherein, The control circuit of the high-voltage battery pack further includes a current monitoring module, and the current monitoring module is respectively connected to the power supply module and the control module; The current monitoring module is used to detect the current signal during the charge and discharge of the battery pack and output the detected current signal to the control module; The control module controls the charge and discharge of the battery pack according to the detected current signal.

7. The control circuit of the high-voltage battery pack according to claim 6, characterized in that, The current monitoring module includes a high-voltage monitoring board and a shunt, and the control module further includes a circuit breaker; One end of the high-voltage monitoring board is connected to the negative electrode of the battery pack, and the other end of the high-voltage monitoring board is connected to the battery main control board; One end of the shunt is respectively connected to the negative electrode input ends of the circuit breaker and the power converter, and the other end of the shunt is respectively connected to the negative electrode of the high-voltage monitoring board and the high-voltage control box.

8. The control circuit of the high-voltage battery pack according to claim 7, wherein The control circuit of the high-voltage battery pack further includes an insulation detection module, and the insulation detection module is respectively connected to the power supply module and the control module; The insulation detection module is used to detect the insulation of the control circuit of the high-voltage battery pack and output the detected insulation to the control module; The control module controls the on-off of the fourth contactor in the power supply module according to the detected insulation.

9. The control circuit of the high-voltage battery pack according to claim 8, characterized in that The battery main control board includes a daisy chain communication interface, an RS485 communication interface, and a CAN communication interface; The daisy chain communication interface is communicatively connected to the battery pack, and the RS485 communication interface and the CAN communication interface are respectively connected to the external load of the high-voltage control box.

10. An electronic device, characterized in that, It includes a device body and the control circuit of the high-voltage battery pack as described in any one of the above claims 1 to 9 provided on the device body.

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