A hot-swap protection circuit and electronic device for an energy storage battery pack

Abstract

This application relates to the field of circuit protection technology, specifically to a hot-swap protection circuit and electronic device for an energy storage battery pack. The hot-swap protection circuit includes an access detection module and a switch signal module. The energy storage battery pack is connected to a wiring harness connector, which has a first signal pin and a second signal pin. A switch assembly is used to disconnect when the external wiring harness connector is pulled out, thereby disconnecting the first and second signal pins. When the user directly pulls out the wiring harness connector, the first and second signal pins immediately disconnect. The access detection module controls the switch signal module to provide a disconnection signal, causing the switch signal module to provide a pull-out signal to the controller based on the disconnection signal, thus triggering the protection action and promptly controlling the disconnection of the main circuit of the energy storage battery pack. This avoids device damage and electric shock risks caused by circuit leakage, greatly improving safety and equipment reliability.

Description

Technical Field

[0001] This application relates to the field of circuit protection technology, specifically to a hot-swap protection circuit and electronic device for an energy storage battery pack. Background Technology

[0002] Power harness connectors are critical components for connecting energy storage battery packs and other devices to external systems. In related technologies, the plug-in terminals of power harness connectors typically lack connection protection for hot-plugging. In actual use, users may directly plug and unplug the harness connectors while the main circuit of the energy storage battery pack is energized and powered. If users plug and unplug the harness connectors while they are powered on, especially with high current, this operation can easily trigger an electric arc. The high temperature generated by the arc can burn out the connector terminals and surrounding components, and may also cause strong electromagnetic interference, affecting the operation of other equipment. Furthermore, the risk of short circuits increases significantly; the large current during a short circuit could potentially cause fires, explosions, and other safety accidents, negatively impacting user safety and the safety of the system equipment. Summary of the Invention

[0003] The embodiments of this application mainly address the technical problem of low safety when power harness connectors are plugged in and out while powered on in related technologies.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a hot-swap protection circuit for an energy storage battery pack, wherein the energy storage battery pack is connected to a wiring harness connector, and a switch assembly is provided at the connection end of the wiring harness connector. The switch assembly includes a first signal pin and a second signal pin. The switch assembly is used to close when the external wiring harness connector is plugged in, so as to connect the first signal pin and the second signal pin, and to open when the external wiring harness connector is unplugged, so as to disconnect the first signal pin and the second signal pin. The hot-swap protection circuit includes an access detection module and a switch signal module. The first end of the access detection module is connected to the first signal pin. The second terminal is connected to the second signal pin, the third terminal of the access detection module is grounded, the first terminal of the switch signal module is used to connect to the power supply, the second terminal of the switch signal module is grounded, the control terminal of the switch signal module is connected to the first signal pin, and the third terminal of the switch signal module is used to connect to the controller; the access detection module is used to provide a disconnect signal to the switch signal module when the first signal pin and the second signal pin are disconnected, and to stop providing the disconnect signal when the first signal pin and the second signal pin are connected; the switch signal module is used to provide a pull-out signal to the controller according to the disconnect signal, so that the controller triggers a protection action according to the pull-out signal.

[0005] In some embodiments, the access detection module includes resistor R4, resistor R7 and capacitor C1. The first end of capacitor C1 is connected to the first signal pin and the control terminal of the switch signal module. The second end of capacitor C1 is connected to the second signal pin. The second end of capacitor C1 is grounded through resistor R7. Resistor R4 is connected in parallel with capacitor C1.

[0006] In some embodiments, the switch signal module includes a switch unit, which includes resistors R1 and R2, a switch transistor Q1, resistors R5 and R8; the first terminal of the switch transistor Q1 is connected to a power supply; the second terminal of the switch transistor Q1 is connected to the first terminal of resistor R5, the second terminal of resistor R5 is connected to the first terminal of resistor R8, the second terminal of resistor R8 is grounded, and the first terminal of resistor R8 is connected to a controller; the control terminal of the switch transistor Q1 is connected to the first signal pin through resistor R2, and the control terminal of the switch transistor Q1 is connected to the power supply through resistor R1.

[0007] In some embodiments, the switching unit further includes a diode DS1, and the resistor R2 is connected to the first signal pin through the diode DS1, wherein the anode of the diode DS1 is connected to the resistor R2, and the cathode of the diode DS1 is connected to the first signal pin.

[0008] In some embodiments, the switch signal module further includes a filtering unit, the first end of which is connected to the first end of the resistor R8, the second end of which is grounded, and the third end of which is connected to the controller.

[0009] In some embodiments, the filter unit includes a resistor R6 and a capacitor C2. The first end of the resistor R8 is connected to the controller through the resistor R6, the first end of the capacitor C2 is connected to the controller, and the second end of the capacitor C2 is connected to the second end of the resistor R8.

[0010] In some embodiments, the switching signal module further includes a clamping unit, a first end of which is connected to a reference power supply, a second end of which is grounded, and a control terminal of which is connected to the first end of the resistor R8; the clamping unit is used to limit the voltage output by the switching unit within a preset range.

[0011] In some embodiments, the clamping unit includes a Schottky diode D1 and a Schottky diode D2. The anode of the Schottky diode D1 is connected to a reference power supply, the cathode of the Schottky diode D1 is connected to the first terminal of the resistor R8, the anode of the Schottky diode D2 is connected to the cathode of the Schottky diode D1, and the cathode of the Schottky diode D2 is grounded.

[0012] In some embodiments, the switch assembly further includes a contact and a spring, the spring being fixedly connected to the first signal pin and the contact being fixedly connected to the second signal pin. The spring is designed to be pressed down to elastically deform and contact the contact after the external wiring harness connector is plugged in, so that the first signal pin and the second signal pin are connected.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is to provide an electronic device, including the hot-swap protection circuit of the energy storage battery pack as described above.

[0014] Unlike related technologies, this application provides a hot-swap protection circuit and electronic device for an energy storage battery pack. The energy storage battery pack is connected to a wiring harness connector, and a switch assembly is provided at the connection end. The switch assembly includes a first signal pin and a second signal pin, which disconnect when the external wiring harness connector is pulled out, thus disconnecting the first and second signal pins. The hot-swap protection circuit includes an access detection module and a switch signal module. Through the elastic contact mechanism between the spring and the contact in the switch assembly of the wiring harness connector, the first and second signal pins are connected when the external connector is normally inserted, allowing the switch signal module to provide a high-level signal to the controller, ensuring the normal operation of the main circuit of the energy storage battery pack. When the user directly pulls out the wiring harness connector, the spring and contact instantly separate, immediately disconnecting the first and second signal pins. The access detection module then controls the switch signal module to provide a disconnect signal, causing the switch signal module to provide a pull-out signal (i.e., a low-level signal) to the controller, thereby triggering a protective action and promptly disconnecting the main circuit of the energy storage battery pack. This avoids device damage and electric shock risks caused by circuit leakage, greatly improving safety and equipment reliability. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a schematic diagram illustrating an application scenario of a hot-swap protection circuit provided in an embodiment of this application; Figure 2 This is a schematic block diagram of a hot-swap protection circuit provided in an embodiment of this application; Figure 3 This is a schematic diagram of the circuit structure of a hot-swap protection circuit provided in an embodiment of this application; Figure 4This is a schematic block diagram of a hot-swap protection circuit provided in another embodiment of this application; Figure 5 This is a schematic diagram of the switching assembly structure of a wire harness connector provided in an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] It should be noted that, unless there is a conflict, the various features in the embodiments of this application can be combined with each other, and all are within the protection scope of this application. Furthermore, although functional modules are divided in the device schematic diagram, in some cases, the steps shown or described can be performed in a different module division or in a different order than that shown in the flowchart.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] During use, energy storage battery packs are often connected to external devices via power harness connectors (or similar power line plug-in terminals), such as connecting to a load to charge it or connecting to a power supply to draw power. However, the plug-in terminals of the harness connectors lack protection, and if a user plugs or unplugs the device while it is energized, it can easily lead to safety accidents, especially under high current conditions. To address this, this application provides a hot-swap protection circuit for energy storage battery packs, wherein the energy storage battery pack is connected to a harness connector and is connected to a load or power supply through the harness connector.

[0021] like Figure 1 As shown in the figure, wire harness connector a represents the wire harness connector that connects to the energy storage battery pack, wire harness connector b represents the wire harness connector that connects to the load, and wire harness connector c represents the wire harness connector that connects to the power supply. For wire harness connector a, wire harness connector b and wire harness connector c are both external wire harness connectors. Figure 1 (a) illustrates that the energy storage battery pack forms a power supply circuit to supply power to the load through wiring harness connectors a and b. Figure 1 (b) illustrates that the energy storage battery pack forms a charging circuit for obtaining electrical energy from the power source through wiring harness connectors a and b.

[0022] The connection end of the wire harness connector is provided with a switching assembly, which includes a first signal pin and a second signal pin. The switching assembly is used to close when the external wire harness connector is plugged in, so as to connect the first signal pin and the second signal pin, and to open when the external wire harness connector is unplugged, so as to disconnect the first signal pin and the second signal pin. Figure 1 Taking connectors a and b as examples, the connection end of connector a of the energy storage battery pack is provided with a first signal pin and a second signal pin. Connector b, which connects to the load, serves as an external connector to connector a. When the connection end of connector b is connected to the connection end of connector a of the energy storage battery pack, the energy storage battery pack can supply power to the load, and the first signal pin and the second signal pin on connector a are connected. When the connection end of connector b is disconnected from the connection end of connector a, the first signal pin and the second signal pin on connector a are disconnected.

[0023] Please combine Figure 2 , Figure 2 This application provides a schematic diagram of a hot-swap protection circuit 100, including an access detection module 13 and a switch signal module 14. The first end of the access detection module 13 is connected to a first signal pin 11, the second end is connected to a second signal pin 12, and the third end is grounded. The first end of the switch signal module 14 is connected to the power supply VCC, the second end is grounded, the control terminal of the switch signal module 14 is connected to the first signal pin 11, and the third end is connected to a controller (not shown) to provide a signal to the controller. This hot-swap protection circuit 100 can output a corresponding signal to the controller based on the connection status of the first signal pin 11 and the second signal pin 12, so that the controller triggers a protection action when the first signal pin 11 and the second signal pin 12 are disconnected.

[0024] The access detection module 13 provides a disconnect signal to the switch signal module 14 when the first signal pin 11 and the second signal pin 12 are disconnected, and stops providing the disconnect signal when the first signal pin 11 and the second signal pin 12 are connected. The switch signal module 14 provides a pull-out signal $N_LOCK to the controller based on the disconnect signal, so that the controller triggers a protection action based on the pull-out signal $N_LOCK. In this embodiment, the controller can be a microcontroller (MCU), a single-chip microcomputer, a battery management system (BMS) of the energy storage battery pack, or other electronic devices or chips with signal processing, logic judgment, and control output functions. This is not limited in this application. The protection action triggered by the controller based on the pull-out signal $N_LOCK can be that the main circuit of the energy storage battery pack stops working, for example, by controlling the switch transistor of the main circuit of the energy storage battery pack to disconnect.

[0025] For specific details, please refer to... Figure 3 The access detection module 13 includes resistors R4 and R7 and capacitor C1. The first end of capacitor C1 is connected to the first signal pin 11 and the control terminal of the switch signal module 14. The second end of capacitor C1 is connected to the second signal pin 12. The second end of capacitor C1 is grounded through resistor R7. Resistor R4 is connected in parallel with capacitor C1. Typically, resistor R4 has a larger resistance and resistor R7 has a smaller resistance. Therefore, when the first signal pin 11 and the second signal pin 12 are connected, the control terminal of the switch signal module 14 is grounded through resistor R7. When the first signal pin 11 and the second signal pin 12 are disconnected, the control terminal of the switch signal module 14 is grounded through resistors R4 and R7. Combined with the power supply VCC pulling up the voltage at the control terminal of the switch signal module 14, a disconnect signal is provided to the switch signal module 14, causing the switch signal module 14 to provide a pull-out signal to the controller, thereby triggering a protection action, such as disconnecting the main circuit of the energy storage battery pack.

[0026] Please see Figure 3 The switching signal module 14 includes a switching unit 141. Specifically, the switching unit 141 includes resistors R1 and R2, a switching transistor Q1, resistors R5 and R8. Figure 3 As shown, the first terminal of the switching transistor Q1 is connected to the power supply VCC, that is... Figure 3 The diagram shows +5V; the second terminal of switch Q1 is connected to the first terminal of resistor R5, the second terminal of resistor R5 is connected to the first terminal of resistor R8, the second terminal of resistor R8 is grounded (GND), and the first terminal of resistor R8 is connected to the controller (not shown) to provide the disconnect signal $N_LOCK to the controller; the control terminal of switch Q1 is connected to the first signal pin 11 through resistor R2, and the control terminal of switch Q1 is connected to the power supply VCC through resistor R1, i.e. Figure 3 The diagram shows +5V.

[0027] Based on this, when an external wiring harness connector is connected to the wiring harness connector corresponding to the energy storage battery pack, the first signal pin 11 and the second signal pin 12 on the wiring harness connector corresponding to the energy storage battery pack are connected. The voltage of the power supply VCC is divided by resistors R1 and R2, making the voltage difference across resistor R1 sufficient to control the switching transistor Q1 to conduct. Through the switching transistor Q1, the power supply VCC is divided by resistors R5 and R8, making the first end of resistor R8 provide a high level to the controller.

[0028] When the external wiring harness connector connected to the corresponding wiring harness connector of the energy storage battery pack is unplugged, the first signal pin 11 and the second signal pin 12 on the corresponding wiring harness connector of the energy storage battery pack are disconnected. Resistor R4, resistors R2 and R1 are connected in series to divide the voltage, raising the voltage to ground at the control terminal of switch Q1. This makes the voltage difference across resistor R1 insufficient to turn on switch Q1, thus causing switch Q1 to turn off. At this time, resistors R5 and R8 are grounded, lowering the voltage at the first terminal of resistor R8, causing the first terminal of resistor R8 to provide a low level to the controller. This low level is the unplug signal mentioned in this scheme. If the controller detects this unplug signal (i.e., the low level at the first terminal of resistor R8), it indicates that the connected external wiring harness connector has been unplugged. The controller will trigger a protective action to protect the circuit safety and potential personnel safety.

[0029] In some embodiments, the switching unit 141 further includes a diode DS1. See also... Figure 3 Resistor R2 is connected to the first signal pin 11 through diode DS1, wherein the anode of diode DS1 is connected to resistor R2, and the cathode of diode DS1 is connected to the first signal pin 11. Diode DS1 can be a low-dropout Schottky diode, which, by utilizing its low forward voltage drop and short reverse recovery time, can reduce conduction losses and provide a faster conduction speed compared to ordinary diodes.

[0030] Please see Figure 4 In some embodiments, the switch signal module 14 further includes a filter unit 142, wherein the first terminal of the filter unit 142 is connected to the first terminal of the resistor R8, the second terminal of the filter unit is grounded, and the third terminal of the filter unit is connected to the controller. Specifically, please refer to... Figure 3 The filter unit 142 includes a resistor R6 and a capacitor C2. The first end of the resistor R8 is connected to the controller through the resistor R6, the first end of the capacitor C2 is connected to the controller, and the second end of the capacitor C2 is connected to the second end of the resistor R8. This design uses a filter unit to remove noise and interference from the signal generated during the switching process of the switching transistor Q1, making the signal transmitted to the controller relatively stable. This improves the accuracy of the controller's signal response and reduces the possibility of false triggering of protection operations.

[0031] Please see Figure 4 In some embodiments, the switch signal module 14 further includes a clamping unit 143, wherein a first terminal of the clamping unit 143 is connected to a reference power supply (shown as 3.3V in the figure), a second terminal of the clamping unit 143 is grounded, and a control terminal of the clamping unit 143 is connected to the first terminal of resistor R8. Specifically, please refer to... Figure 3 The clamping unit 143 includes Schottky diode D1 and Schottky diode D2. For example... Figure 3 As shown, the cathode of the Schottky diode D1 is connected to the reference power supply +3V3 (i.e., Figure 3 (3.3V in the middle), the anode of Schottky diode D1 is connected to the first end of resistor R8, the cathode of Schottky diode D2 is connected to the anode of Schottky diode D1, and the anode of Schottky diode D2 is grounded to GND.

[0032] Based on this, the clamping unit 143 is used to limit the voltage output by the switching unit 141 within a preset range. In this embodiment, the reference voltage is 3.3V, and the corresponding preset range is specifically the range of 0-3.3V. When the switching transistor Q1 is turned on, the power supply VCC is divided by resistors R5 and R8, and a high level is provided to the controller through the first terminal of resistor R8. If the voltage of this high-level electrical signal is between 0-3.3V, then both Schottky diodes D1 and D2 are not turned on. If the voltage of this high-level signal is greater than 3.3V (for example, it may be affected by other nearby devices, causing voltage fluctuations to be greater than 3.3V), then Schottky diode D1 is turned on, clamping its voltage at 3.3V. When the switching transistor Q1 is turned off, the first terminal of resistor R8 provides a low level (pull-out signal) to the controller based on GND. Similarly, if there is some interference that causes the voltage of this low level to be lower than GND, Schottky diode D2 will also clamp it in reverse at the GND voltage.

[0033] In some embodiments, please combine Figure 5 In the above scheme (wire harness connector a of the energy storage battery pack), the switching assembly also includes a contact 22 and a spring 21. The spring 21 is fixedly connected to the first signal pin 11, and the contact 22 is fixedly connected to the second signal pin 12. The spring 21 supports being pressed until it undergoes elastic deformation to contact the contact 22 after the external wire harness connector (wire harness connector b in the figure) is plugged in, so that the first signal pin 11 and the second signal pin 12 are connected.

[0034] In this scenario, assuming the energy storage battery pack is connected to the load via a wiring harness connector, and the main circuit of the energy storage battery pack is supplying power to the load, the spring 21 contacts the contact 22 under pressure. The first signal pin 11 and the second signal pin 12 are connected, and the connected hot-swap protection circuit provides a high-level signal to the controller. The main circuit of the energy storage battery pack then normally supplies power to the load. In this situation, if the user does not notice the power supply status and directly unplugs the wiring harness connector b, the spring 21 and contact 22 will instantly separate, the first signal pin 11 and the second signal pin 12 will disconnect, and the connected hot-swap protection circuit will then provide a low-level signal (unplug signal) to the controller. This causes the controller to trigger a protective action in response to the unplug signal, controlling the main circuit of the energy storage battery pack to disconnect, preventing circuit leakage that could damage devices or cause injury.

[0035] This application provides a hot-swap protection circuit for an energy storage battery pack, including an access detection module and a switch signal module. Combined with the wiring harness connector connected to the energy storage battery pack, the circuit utilizes the elastic contact mechanism between the spring and the contact in the switch assembly of the wiring harness connector to ensure that the first and second signal pins are connected when the external connector is normally inserted. This allows the switch signal module to provide a high-level signal to the controller, ensuring the normal operation of the main circuit of the energy storage battery pack. When the user directly pulls out the wiring harness connector, the spring and contact instantly separate, and the first and second signal pins immediately disconnect. The access detection module then controls the switch signal module to provide a disconnect signal, causing the switch signal module to provide a pull-out signal (i.e., a low-level signal) to the controller based on the disconnect signal, thereby triggering a protective action. This promptly controls the disconnection of the main circuit of the energy storage battery pack, thus avoiding device damage and electric shock risks caused by circuit leakage, greatly improving safety and equipment reliability.

[0036] This application provides a PCB board that integrates the hot-swap protection circuit described in the above embodiments. Based on this, the PCB board possesses the technical features and beneficial effects of the aforementioned hot-swap protection circuit. Technical details not described in the PCB board embodiments can be found in the above-described hot-swap protection circuit embodiments.

[0037] This application provides an electronic device that includes the hot-swap protection circuit described in the above embodiments. Based on this, the electronic device possesses the technical features and beneficial effects of the hot-swap protection circuit described above. Technical details not described in the electronic device embodiments can be found in the above-described hot-swap protection circuit embodiments.

[0038] The device described above is merely illustrative. The units / modules described as separate components may or may not be physically separate. The components shown as modules / units may or may not be physical units; that is, they may be located in one place or distributed across multiple modules / units. Some or all of the modules / units can be selected to achieve the purpose of this embodiment according to actual needs.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hot-swap protection circuit for an energy storage battery pack, wherein the energy storage battery pack supports electrical connection to an external wiring harness connector via a wiring harness connector, characterized in that, The connection end of the wire harness connector is provided with a switch assembly, which includes a first signal pin and a second signal pin. The switch assembly is used to close when the external wire harness connector is plugged in, so as to connect the first signal pin and the second signal pin, and to open when the external wire harness connector is unplugged, so as to disconnect the first signal pin and the second signal pin. The hot-swap protection circuit includes an access detection module and a switch signal module. The first end of the access detection module is connected to the first signal pin, the second end of the access detection module is connected to the second signal pin, and the third end of the access detection module is grounded. The first end of the switch signal module is used to connect to the power supply, the second end of the switch signal module is grounded, the control end of the switch signal module is connected to the first signal pin, and the third end of the switch signal module is used to connect to the controller. The access detection module is configured to provide a disconnect signal to the switch signal module when the first signal pin and the second signal pin are disconnected, and to stop providing the disconnect signal when the first signal pin and the second signal pin are connected. The switch signal module is used to provide a pull-out signal to the controller according to the disconnect signal, so that the controller triggers a protection action according to the pull-out signal.

2. The hot-swap protection circuit according to claim 1, characterized in that, The access detection module includes resistor R4, resistor R7 and capacitor C1. The first end of capacitor C1 is connected to the first signal pin and the control terminal of the switch signal module. The second end of capacitor C1 is connected to the second signal pin. The second end of capacitor C1 is grounded through resistor R7. Resistor R4 is connected in parallel with capacitor C1.

3. The hot-swap protection circuit according to claim 1, characterized in that, The switching signal module includes a switching unit, which includes resistors R1 and R2, a switching transistor Q1, resistors R5 and R8. The first terminal of the switching transistor Q1 is connected to the power supply; the second terminal of the switching transistor Q1 is connected to the first terminal of the resistor R5, the second terminal of the resistor R5 is connected to the first terminal of the resistor R8, the second terminal of the resistor R8 is grounded, and the first terminal of the resistor R8 is connected to the controller; the control terminal of the switching transistor Q1 is connected to the first signal pin through the resistor R2, and the control terminal of the switching transistor Q1 is connected to the power supply through the resistor R1.

4. The hot-swap protection circuit according to claim 3, characterized in that, The switching unit further includes a diode DS1, and the resistor R2 is connected to the first signal pin through the diode DS1, wherein the anode of the diode DS1 is connected to the resistor R2, and the cathode of the diode DS1 is connected to the first signal pin.

5. The hot-swap protection circuit according to claim 3, characterized in that, The switch signal module further includes a filtering unit. The first end of the filtering unit is connected to the first end of the resistor R8, the second end of the filtering unit is grounded, and the third end of the filtering unit is connected to the controller.

6. The hot-swap protection circuit according to claim 5, characterized in that, The filtering unit includes a resistor R6 and a capacitor C2. The first end of the resistor R8 is connected to the controller through the resistor R6. The first end of the capacitor C2 is connected to the controller. The second end of the capacitor C2 is connected to the second end of the resistor R8.

7. The hot-swap protection circuit according to claim 3, characterized in that, The switch signal module also includes a clamping unit. The first end of the clamping unit is used to connect to the reference power supply, the second end of the clamping unit is grounded, and the control end of the clamping unit is connected to the first end of the resistor R8. The clamping unit is used to limit the voltage output by the switching unit within a preset range.

8. The hot-swap protection circuit according to claim 7, characterized in that, The clamping unit includes a Schottky diode D1 and a Schottky diode D2. The cathode of the Schottky diode D1 is connected to a reference power supply, the anode of the Schottky diode D1 is connected to the first terminal of the resistor R8, the cathode of the Schottky diode D2 is connected to the anode of the Schottky diode D1, and the anode of the Schottky diode D2 is grounded.

9. The hot-swap protection circuit according to claim 1, characterized in that, The switch assembly further includes a contact and a spring. The spring is fixedly connected to the first signal pin, and the contact is fixedly connected to the second signal pin. The spring supports being pressed until it undergoes elastic deformation to contact the contact after the external wiring harness connector is plugged in, so that the first signal pin and the second signal pin are connected.

10. An electronic device, characterized in that, Includes the hot-swap protection circuit for the energy storage battery pack as described in any one of claims 1-9.

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