Energy storage battery pack and energy storage system

Abstract

The invention discloses an energy storage battery pack and an energy storage system, the energy storage battery pack comprises a switch detection circuit, the switch detection circuit is used for being electrically connected with a switch assembly, the switch detection circuit is used for outputting a detection signal when the switch assembly is conducted, and the switch assembly is arranged on the energy storage battery pack or an external device electrically connected with the energy storage battery pack; the signal receiving circuit is used for receiving a signal sent by the main battery pack; the first control circuit is electrically connected to the switch detection circuit and the signal receiving circuit and is used for judging whether the signal receiving circuit receives a preset signal sent by the main battery pack within first preset time when receiving the detection signal; and when the preset signal is not received within the first preset time, charging and discharging of the energy storage battery pack are forbidden. The charging and discharging of the energy storage battery pack can be forbidden in time, so that the terminal sparking phenomenon is reduced when the energy storage battery pack and the main battery pack are reconnected, the service life of the energy storage battery pack and the main battery pack is prolonged, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage battery pack and an energy storage system. Background Art

[0002] In energy storage systems, in order to increase the total capacity and voltage of the battery, it is common to use the main battery pack and the slave battery pack in parallel. This approach is also called the power pack combination battery solution, which is achieved by connecting the battery packs in parallel. This solution has some technical challenges, especially when there is a voltage difference between the main battery pack and the slave battery pack, the parallel operation may cause circulating current.

[0003] The existing Battery Management System (BMS) may fail to respond promptly to the voltage difference between the master battery pack and the slave battery pack when processing parallel battery packs. When disconnecting the parallel line, it may cause a delay in cutting off the charging and discharging circuits of the slave battery pack, which may cause terminal sparking when the parallel line is reconnected. Summary of the invention

[0004] The present application mainly provides an energy storage battery pack and an energy storage system to solve the problem of terminal sparking in the prior art.

[0005] The present application provides an energy storage battery pack, which is applied to an energy storage system. The energy storage system includes the energy storage battery pack and a main battery pack. When the energy storage battery pack is installed in the energy storage system, it is electrically connected to the main battery pack, including:

[0006] A switch detection circuit, the switch detection circuit is used to be electrically connected to the switch component, and the switch detection circuit is used to output a detection signal when the switch component is turned on, wherein the switch component is provided on the energy storage battery pack or an external device electrically connected to the energy storage battery pack;

[0007] A signal receiving circuit, used for receiving a signal sent by the main battery pack;

[0008] A first control circuit, electrically connected to the switch detection circuit and the signal receiving circuit, for determining, upon receiving the detection signal, whether the signal receiving circuit has received a preset signal sent by the main battery pack within a first preset time;

[0009] When the preset signal is not received within the first preset time, charging and discharging of the energy storage battery pack are prohibited.

[0010] The present application also provides an energy storage battery pack, which is applied to an energy storage system. The energy storage system includes the energy storage battery pack, a peripheral component, and a main battery pack. When the energy storage battery pack is installed in the energy storage system, the peripheral component is electrically connected to the energy storage battery pack and the main battery pack, including:

[0011] The input interface is electrically connected to the peripheral component;

[0012] A signal receiving circuit, used for receiving a signal sent by the main battery pack;

[0013] a first control circuit, electrically connected to the input interface and the signal receiving circuit, for receiving a detection signal output by the peripheral component / the main battery pack, and upon receiving the detection signal, determining whether the signal receiving circuit has received a preset signal sent by the main battery pack within a first preset time;

[0014] When the preset signal is not received within the first preset time, charging and discharging of the energy storage battery pack are prohibited.

[0015] The present application also provides an energy storage system, comprising the above-mentioned energy storage battery pack and a main battery pack, wherein the energy storage battery pack is electrically connected to the main battery pack when installed in the energy storage system.

[0016] The beneficial effects of the present application are as follows: the energy storage battery pack of the present application is applied to an energy storage system, the energy storage system comprises an energy storage battery pack and a main battery pack, the energy storage battery pack is electrically connected to the main battery pack when installed in the energy storage system; the switch detection circuit is used to be electrically connected to the switch component, and the switch detection circuit is used to output a detection signal when the switch component is turned on, wherein the switch component is arranged on the energy storage battery pack or an external device electrically connected to the energy storage battery pack; the signal receiving circuit is used to receive a signal sent by the main battery pack; the first control circuit is electrically connected to the switch detection circuit and the signal receiving circuit, and is used to determine whether the signal receiving circuit receives a preset signal sent by the main battery pack within a first preset time when receiving the detection signal; when the preset signal is not received within the first preset time, the charging and discharging of the energy storage battery pack is prohibited. The switch detection circuit outputs a detection signal when the switch component is pressed to turn on, and the first control circuit confirms that the energy storage battery pack and the main battery pack are electrically disconnected when the preset signal is not received within the first preset time, so that the charging and discharging of the energy storage battery pack can be prohibited in time, thereby reducing the terminal sparking phenomenon when the energy storage battery pack and the main battery pack are reconnected, thereby increasing the life of the energy storage battery pack and the main battery pack and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 is a structural schematic diagram of an embodiment of an energy storage system provided by the present application;

[0019] Figure 2 is a structural schematic diagram of another embodiment of the energy storage system provided by the present application;

[0020] Figure 3 is a structural schematic diagram of another embodiment of the energy storage system provided by the present application;

[0021] Figure 4 This is a structural diagram of another embodiment of the energy storage system provided by the present application.

[0022] Figure 5 yes Figure 4 A schematic structural diagram of an embodiment of a switch assembly;

[0023] Figure 6 yes Figure 4 A circuit diagram of an embodiment of a signal receiving circuit;

[0024] Figure 7 yes Figure 4 A circuit diagram of an embodiment of a signal output circuit;

[0025] Figure 8 yes Figure 4 A circuit diagram of an embodiment of a switch detection circuit in FIG. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0028] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be connected between, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] This application provides an energy storage battery pack, see Figure 1 As shown, Figure 11 is a schematic diagram of the structure of an embodiment of the energy storage system provided in the present application. The energy storage battery pack 20 of the present embodiment is applied to the energy storage system 100, and the energy storage system 100 includes a main battery pack 10 and an energy storage battery pack 20. Among them, the main battery pack 10 and the energy storage battery pack 20 both include but are not limited to battery packs, energy storage boxes or outdoor power supplies.

[0035] When the energy storage battery pack 20 is installed in the energy storage system 100, it is electrically connected to the main battery pack 10. For example, when the total capacity of the energy storage system 100 needs to be increased, the energy storage battery pack 20 is installed in the energy storage system 100, and the main battery pack 10 and the energy storage battery pack 20 are electrically connected to achieve parallel use; when the total capacity of the energy storage system 100 does not need to be increased, the energy storage battery pack 20 and the main battery pack 10 are electrically disconnected.

[0036] The electrical connection between the main battery pack 10 and the energy storage battery pack 20 can generally be achieved through an electrical connection line, or the main battery pack 10 and the energy storage battery pack 20 can be electrically connected to an external parallel device to achieve electrical connection.

[0037] The energy storage battery pack 20 includes a switch detection circuit 40 , a first control circuit 21 and a signal receiving circuit 22 , that is, the switch detection circuit 40 , the first control circuit 21 and the signal receiving circuit 22 are disposed on the energy storage battery pack 20 .

[0038] The switch detection circuit 40 is electrically connected to the switch component 30, and is used to output a detection signal when the switch component 30 is turned on. For example, the switch component 30 is used to disconnect when it is not pressed, and to conduct when it is pressed. Specifically, the switch component 30 can be turned on when an external pressing force is applied, and not turned on when there is no external pressing force (under normal conditions), and the normal non-conducting state is restored after the external pressing force is removed. The switch component 30 is connected to the switch detection circuit 40, and when the switch component 30 is turned on when it is pressed, the switch detection circuit 40 can detect that the switch component 30 is turned on and output a detection signal. Among them, the switch detection circuit 30 can be a detection circuit formed by a chip for detection and a chip peripheral circuit, or a detection circuit formed by a comparator and other circuits, or a detection circuit formed by a current or voltage sensor. It can be understood that those skilled in the art can design a reasonable circuit based on the functions of the above-mentioned switch component 30 and the switch detection circuit 40, which will not be repeated here.

[0039] The switch assembly 30 is disposed on the energy storage battery pack 20 or an external device electrically connected to the energy storage battery pack 20. Figure 1As shown, the switch assembly 30 is disposed on the energy storage battery pack 20, and the switch assembly 30 is electrically connected to the switch detection circuit 40. In other embodiments, the switch assembly 30 is disposed on an external device electrically connected to the energy storage battery pack 20, for example, the switch assembly 30 is disposed on the main battery pack 10.

[0040] In some embodiments, Figure 1 As shown, the switch assembly 30 is connected to the main battery pack 10 and the energy storage battery pack 20. In other embodiments, the switch assembly 30 is connected to the main battery pack 10, or the switch assembly 30 is connected to the energy storage battery pack 20.

[0041] The signal receiving circuit 22 is used to receive the signal sent by the main battery pack 10, and the signal sent by the main battery pack 10 includes a preset signal. The first control circuit 21 is electrically connected to the switch detection circuit 40 and the signal receiving circuit 22, such as Figure 1 shown.

[0042] The first control circuit 21 is used to receive a detection signal from the switch detection circuit 40. The first control circuit 21 is used to determine whether the signal receiving circuit 22 receives a preset signal sent by the main battery pack 10 within a first preset time when receiving the detection signal; if the preset signal is not received within the first preset time, the charging and discharging of the energy storage battery pack 20 is prohibited.

[0043] Specifically, the first control circuit 21 is used to determine whether the signal receiving circuit 22 receives a preset signal sent by the main battery pack 10 within the first preset time when receiving the detection signal; if the preset signal is not received within the first preset time, it is confirmed that the energy storage battery pack 20 and the main battery pack are disconnected electrically, and the charging and discharging of the energy storage battery pack 20 is prohibited. The first control circuit 21 is used to prohibit the charging and discharging of the energy storage battery pack 20, including but not limited to controlling the charging and discharging circuit of the energy storage battery pack 20 to be disconnected.

[0044] For example, the first preset time is 3 minutes. When the first control circuit 21 receives the detection signal, it determines whether the signal receiving circuit 22 receives the preset signal within 3 minutes; when the preset signal is not received within 3 minutes, the charging and discharging of the energy storage battery pack 20 is prohibited.

[0045] In the prior art, when the master battery pack and the slave battery pack are disconnected, the charging and discharging circuit of the slave battery pack is not cut off. When the master battery pack and the slave battery pack are reconnected, the charging and discharging circuit of the slave battery pack is not cut off, which may cause terminal sparking. The energy storage battery pack 20 of this embodiment is applied to the energy storage system 100. The energy storage system 100 includes the energy storage battery pack 20 and the main battery pack 10. When the energy storage battery pack 20 is installed in the energy storage system 100, it is electrically connected to the main battery pack 10. The switch detection circuit 40 is used to be electrically connected to the switch assembly 30, and the switch detection circuit 40 is used to output a detection signal when the switch assembly 30 is turned on, wherein the switch assembly 30 is arranged on the energy storage battery pack 20 or an external device electrically connected to the energy storage battery pack 20. The signal receiving circuit 22 is used to receive a signal sent by the main battery pack 10. The first control circuit 21 is electrically connected to the switch detection circuit 40 and the signal receiving circuit 22, and is used to determine whether the signal receiving circuit 22 receives a preset signal sent by the main battery pack 10 within a first preset time when receiving the detection signal; when the preset signal is not received within the first preset time, the charging and discharging of the energy storage battery pack 20 is prohibited. The switch detection circuit 40 outputs a detection signal when the switch assembly 30 is pressed to turn on, and the first control circuit 21 confirms that the energy storage battery pack 20 and the main battery pack 10 are electrically disconnected when the preset signal is not received within the first preset time, so that the charging and discharging of the energy storage battery pack 20 can be prohibited in time, thereby reducing the terminal sparking phenomenon when the energy storage battery pack 20 and the main battery pack 10 are reconnected, thereby increasing the life of the energy storage battery pack 20 and the main battery pack 10 and improving the user experience.

[0046] According to some embodiments of the present application, the external device of this embodiment includes a main battery pack 10 or a peripheral component.

[0047] When the external device includes a main battery pack 10, the switch assembly 30 is disposed on the main battery pack 10. When the external device includes an external component, the external component is used to electrically connect the energy storage battery pack 20 to the main battery pack 10, and the switch assembly 30 is disposed on the external component.

[0048] The switch assembly 30 may be disposed outside the main battery pack 10 and the energy storage battery pack 20, and may be disposed independently of the main battery pack 10 and the energy storage battery pack 20. For example, the switch assembly 30 may be disposed on an external component, a parallel control device, an electrical connection line (parallel line), or other control devices electrically connected to the main battery pack 10 and the energy storage battery pack 20, which are not limited here.

[0049] In other embodiments, the switch detection circuit 40 may also be arranged outside the main battery pack 10 and the energy storage battery pack 20, and be arranged independently of the main battery pack 10 and the energy storage battery pack 20. For example, the switch detection circuit 40 may be arranged on an external component, a parallel control device, an electrical connection line (parallel line), or other control devices electrically connected to the main battery pack 10 and the energy storage battery pack 20, which are not limited here. It can be understood that no matter whether the switch component 30 and the switch detection circuit 40 are arranged at any of the above positions, as long as the electrical connection between the two can be satisfied, and the switch detection circuit 40 can detect and output the detection signal when the switch component 30 is turned on.

[0050] The external device of this embodiment also includes an external component, which is used to electrically connect the energy storage battery pack 20 and the main battery pack 10. The switch assembly 30 is arranged on the external component to improve the application scenario of the energy storage system 100 and improve the user experience.

[0051] The present application also provides an energy storage battery pack 20, see Figure 2 As shown, Figure 2 1 is a schematic diagram of another embodiment of the energy storage system provided by the present application. The energy storage battery pack 20 of this embodiment is applied to the energy storage system 100, and the energy storage system 100 includes a main battery pack 10, a peripheral component 60 and the energy storage battery pack 20, and the peripheral component 60 is electrically connected to the energy storage battery pack 20 and the main battery pack 10.

[0052] The energy storage battery pack 20 of this embodiment includes an input interface 23 , a first control circuit 21 and a signal receiving circuit 22 . The input interface 23 is electrically connected to the peripheral component 60 , that is, the input interface 23 is electrically connected to the main battery pack 10 through the peripheral component 60 .

[0053] The signal receiving circuit 22 is used to receive a signal sent by the main battery pack 10 , where the signal sent by the main battery pack 10 includes a preset signal. The first control circuit 21 is electrically connected to the input interface 23 and the signal receiving circuit 22 .

[0054] The first control circuit 21 is used to receive a detection signal from the input interface 23, that is, to receive a detection signal output by the peripheral component 60 / the main battery pack 10; for example, the first control circuit 21 is used to receive a detection signal output by the peripheral component 60; or, the first control circuit 21 is used to receive a detection signal output by the main battery pack 10. The first control circuit 21 is used to determine whether the signal receiving circuit 22 receives a preset signal sent by the main battery pack 10 within a first preset time when receiving the detection signal; if the preset signal is not received within the first preset time, the energy storage battery pack 20 is prohibited from charging and discharging.

[0055] The energy storage battery pack 20 of this embodiment includes an input interface 23, a first control circuit 21 and a signal receiving circuit 22. The input interface 23 is electrically connected to the peripheral component 60. The first control circuit 21 is used to receive a detection signal output by the peripheral component 60 / the main battery pack 10. The first control circuit 21 is used to determine whether the signal receiving circuit 22 receives a preset signal sent by the main battery pack 10 within a first preset time when receiving the detection signal. If the preset signal is not received within the first preset time, the charging and discharging of the energy storage battery pack 20 is prohibited. The first control circuit 21 receives a detection signal from the peripheral component 60 or the main battery pack 10, and if the first control circuit 21 does not receive the preset signal within the first preset time, it is confirmed that the energy storage battery pack 20 and the main battery pack 10 are disconnected electrically, so that the charging and discharging of the energy storage battery pack 20 can be prohibited in time, thereby reducing the terminal sparking phenomenon when the energy storage battery pack 20 and the main battery pack 10 are reconnected, thereby increasing the life of the energy storage battery pack 20 and the main battery pack 10, and improving the user experience.

[0056] According to some embodiments of the present application, the peripheral component 60 of the present embodiment includes a parallel line 50, and the main battery pack 10 and the energy storage battery pack 20 are electrically connected through the parallel line 50, such as Figure 2 In other embodiments, as shown in Figure 1 As shown, the main battery pack 10 and the energy storage battery pack 20 are electrically connected via a parallel line 50 .

[0057] like Figure 2 As shown, a switch assembly 30 and a switch detection circuit 40 are provided on the parallel line 50. The switch assembly 30 is used to be disconnected when not pressed and turned on when pressed, and the switch detection circuit 40 is electrically connected to the switch assembly 30, and the switch detection circuit 40 is used to output a detection signal when the switch assembly 30 is turned on. For example, the switch detection circuit 40 is provided on the switch assembly 30; or, the switch assembly 30 and the switch detection circuit 40 are provided at the parallel port of the parallel line 50.

[0058] In some embodiments, the parallel line 50 is electrically connected to the input interface 23 through the switch component 30 and the switch detection circuit 40, the first control circuit 21 is electrically connected to the switch detection circuit 40 through the input interface 23, the switch detection circuit 40 is used to output a detection signal when the switch component 30 is turned on, and the first control circuit 21 receives the detection signal from the switch detection circuit 40 through the input interface 23, that is, the first control circuit 21 is used to receive the detection signal output by the peripheral component 60.

[0059] The peripheral component 60 of this embodiment includes a parallel line 50 , and the main battery pack 10 and the energy storage battery pack 20 are electrically connected via the parallel line 50 . The main battery pack 10 and the energy storage battery pack 20 can be connected in parallel via the parallel line 50 .

[0060] According to some embodiments of the present application, the peripheral component 60 of the present embodiment includes a control device, which refers to an electronic device independent of the main battery pack 10 and the energy storage battery pack 20. The control device is connected to at least one of the main battery pack 10 and the energy storage battery pack 20 for communication; for example, the control device can be connected to the main battery pack 10 for communication, or to the energy storage battery pack 20 for communication, or to the main battery pack 10 and the energy storage battery pack 20 for communication. Among them, the switch assembly 30 and the switch detection circuit 40 can be arranged on the control device.

[0061] The control device of this embodiment is in communication connection with at least one of the main battery pack 10 and the energy storage battery pack 20, and can control the main battery pack 10 or the energy storage battery pack 20 through the control device. In addition, the switch assembly 30 and the switch detection circuit 40 can be arranged on the control device, and do not need to be arranged on the main battery pack 10 and the energy storage battery pack 20, thereby reducing the space occupied by the switch assembly 30 and the switch detection circuit 40 in the main battery pack 10 or the energy storage battery pack 20.

[0062] According to some embodiments of the present application, the peripheral component 60 of the present embodiment includes a parallel control device, the two parallel ports of the parallel control device are electrically connected to the main battery pack 10 and the energy storage battery pack 20 respectively, and the output port of the parallel control device is used to supply power to the outside, and the parallel control device is provided with a switch component 30 and a switch detection circuit 40. Among them, the switch component 30 is connected to the switch detection circuit 40 through the electrical connection loop between the parallel control device and the main battery pack 10 and the energy storage battery pack 20. That is, the switch component 30 forms a connection loop through the electrical connection between the parallel control device and the main battery pack 10 and the energy storage battery pack 20, and the switch detection circuit 40 is connected to the connection loop.

[0063] The switch assembly 30 of this embodiment is connected to the switch detection circuit 40 through the electrical connection loop of the parallel control device and the main battery pack 10 and the energy storage battery pack 20, and can electrically connect the main battery pack 10 and the energy storage battery pack 20 through the parallel control device.

[0064] According to some embodiments of the present application, Figure 3 As shown, the energy storage system 100 of this embodiment is Figure 2 The difference of the energy storage system 100 shown is that: when the peripheral component 60 is electrically connected to the main battery pack 10 and the energy storage battery pack 20, the main battery pack 10 may include a switch assembly 30 and a switch detection circuit 40, and the switch assembly 30 is used to be disconnected when not pressed, and the main battery pack 10 is electrically connected to the energy storage battery pack 20 through the peripheral component 60; the switch assembly 30 is turned on when pressed, and the main battery pack 10 and the energy storage battery pack 20 are electrically disconnected, and the switch detection circuit 40 is used to output a detection signal when the switch assembly 20 is turned on.

[0065] In some embodiments, the first control circuit 21 is electrically connected to the main battery pack 10 through the input interface 23 and the external component 60, that is, the first control circuit 21 is connected to the switch detection circuit 40 through the input interface 23 and the external component 60; the switch assembly 30 is turned on when pressed, and at this time the first control circuit 21 receives a detection signal from the switch detection circuit 40 through the input interface 23 and the external component 60, so that the first control circuit 21 is used to receive the detection signal output by the main battery pack 10.

[0066] According to some embodiments of the present application, Figure 4 As shown, the parallel line 50 of this embodiment is arranged between the main battery pack 10 and the energy storage battery pack 20, and the main battery pack 10 and the energy storage battery pack 20 are electrically connected through the parallel line 50. When the parallel line 50 is electrically disconnected from the main battery pack 10 and / or the energy storage battery pack 20, the main battery pack 10 is electrically disconnected from the energy storage battery pack 20. For example, the parallel line 50 is electrically disconnected from the main battery pack 10; or, the parallel line 50 is electrically disconnected from the energy storage battery pack 20; or, the parallel line 50 is electrically disconnected from both the main battery pack 10 and the energy storage battery pack 20; then the main battery pack 10 is electrically disconnected from the energy storage battery pack 20.

[0067] The switch assembly 30 is located on the parallel line 50, that is, the switch assembly 30 is arranged at the end of the parallel line 50, and the parallel line 50 is connected to the main battery pack 10 and / or the energy storage battery pack 20 through the switch assembly 30. For example, the energy storage system 100 includes two switch assemblies 30, and the switch assemblies 30 are respectively arranged at both ends of the parallel line 50, and the parallel line 50 is respectively connected to the main battery pack 10 and the energy storage battery pack 20 through the two switch assemblies 30.

[0068] In other embodiments, a switch assembly 30 is provided at one end of the parallel line 50 close to the main battery pack 10, and the parallel line 50 is connected to the main battery pack 10 through the switch assembly 30; or, a switch assembly 30 is provided at one end of the parallel line 50 close to the energy storage battery pack 20, and the parallel line 50 is connected to the energy storage battery pack 20 through the switch assembly 30.

[0069] According to some embodiments of the present application, Figure 4 As shown, the parallel cable 50 includes a connecting terminal and a wire body, the wire body is connected to the connecting terminal, and the connecting terminal is used to connect to the main battery pack 10 or the energy storage battery pack 20.

[0070] Among them, the connecting terminal is used to connect with the main battery pack 10 or the energy storage battery pack 20, which means that the connecting terminal and the main battery pack 10 or the energy storage battery pack 20 are mechanically detachably connected; when the connecting terminal is used to connect with the main battery pack 10 or the energy storage battery pack 20, the wire body is electrically connected to the main battery pack 10 or the energy storage battery pack 20.

[0071] In some embodiments, the wire body includes at least one connecting wire, for example, the wire body includes multiple connecting wires, and the main battery pack 10 is electrically connected to the energy storage battery pack 20 through the multiple connecting wires.

[0072] In some embodiments, connection terminals are disposed at both ends of the wire body, and the wire body is connected to the main battery pack 10 or the energy storage battery pack 20 respectively through the connection terminals.

[0073] like Figure 5 As shown, the switch assembly 30 of this embodiment includes a switch element 31 and a button 32. The switch element 31 has a first end 33 and a second end 34. The first end 33 and the second end 34 of the switch element 31 are both connected to the switch detection circuit 40. The button 32 is connected to the switch element 31, and the button 32 is protruding on the connection end of the parallel line 50.

[0074] The key 32 is used to drive the switch element 31 to conduct the detection loop formed with the switch detection circuit 40 when it is pressed, so that the switch detection circuit 40 outputs a detection signal. For example, when the key is pressed, the first end 33 and the second end 34 of the switch element 31 are connected, thereby driving the switch element 31 to conduct the detection loop formed with the switch detection circuit 40, so that the switch detection circuit 40 outputs a detection signal.

[0075] In some embodiments, the switch element 31 may include a micro switch.

[0076] The switch assembly 30 of this embodiment includes a switch element 31 and a button 32. The switch element 31 has a first end 33 and a second end 34. When the button 32 is pressed, the first end 33 and the second end 34 of the switch element 31 are connected, thereby driving the switch element 31 to conduct the detection loop formed with the switch detection circuit 40, so that the switch detection circuit 40 outputs a detection signal. The structure is simple, easy to implement, and reduces costs.

[0077] According to some embodiments of the present application, Figure 4 As shown, the energy storage system 100 of this embodiment includes two switch assemblies 30 , and the two switch assemblies 30 are respectively arranged on two connecting terminals of the parallel line 50 , for example, the two switch assemblies 30 are respectively arranged at two ends of the parallel line 50 .

[0078] The main battery pack 10 of this embodiment includes a switch detection circuit 40, a second control circuit 12 and a signal output circuit 11, and the second control circuit 12 of the main battery pack 10 is electrically connected to the switch detection circuit 40 and the signal output circuit 11. The energy storage battery pack 20 of this embodiment includes a switch detection circuit 40, a first control circuit 21 and a signal receiving circuit 22, and the first control circuit 21 is electrically connected to the signal receiving circuit 22 and the switch detection circuit 40.

[0079] The switch detection circuit 40 of the main battery pack 10 is electrically connected to the switch detection circuit 40 of the energy storage battery pack 20 through two switch components 30 and a parallel line, and the signal output circuit 11 is electrically connected to the signal receiving circuit 22 through two switch components 30 and a parallel line.

[0080] In some embodiments, the two buttons 32 in the two switch assemblies 30 are respectively protruded on the side walls of the two connecting terminals of the parallel line 50 to facilitate the two buttons 32 to be pressed.

[0081] Each parallel line 50 includes a first connection line 51, a second connection line 52, and a third connection line 53. The first end 33 of the switch element 31 includes a first pin, and the second end 34 of the switch element 31 includes a second pin. The first connection line 51 is used to connect the first pins of the two switch elements 31 to each other, and the second connection line 52 is used to connect the second pins of the two switch elements 31 to each other. That is, the first pins of the two corresponding switch elements 31 are connected through the first connection line 51, and the second pins of the two corresponding switch elements 31 are connected through the second connection line 52.

[0082] The third connection line 53 is used to transmit a preset signal. For example, the switch 31 includes a third terminal 35, the third terminal of the switch 31 includes a third pin, and the third pins of two corresponding switch components 31 are connected through the third connection line 53 to transmit a preset signal. The preset signal includes but is not limited to a PWM (Pulse Width Modulation) wake-up signal.

[0083] The energy storage system 100 of this embodiment includes two switch components 30, which are respectively arranged on two connecting terminals of the parallel line 50. When the two connecting terminals of the parallel line 50 are electrically disconnected from the corresponding main battery pack 10 or the energy storage battery pack 20, the switch detection circuit 40 is prevented from being unable to form a detection loop with the corresponding switch element 31, so that the switch detection circuit 40 outputs a detection signal.

[0084] According to some embodiments of the present application, the energy storage battery pack 20 of this embodiment further includes a charging MOS tube and a discharging MOS tube connected in sequence, and the energy storage battery pack 20 is charged through the charging MOS tube or discharged through the discharging MOS tube.

[0085] The first control circuit 21 is used to control the charging MOS tube and the discharging MOS tube to be disconnected when it is determined that the preset signal is not received within the first preset time, so as to prohibit the charging and discharging of the energy storage battery pack 20 .

[0086] The first control circuit 21 of this embodiment is used to control the charging MOS tube and the discharging MOS tube to be disconnected when determining that a preset signal has not been received within the first preset time, so as to prohibit the charging and discharging of the energy storage battery pack 20, thereby reducing the terminal sparking phenomenon when the main battery pack 10 and the energy storage battery pack 20 are reconnected, thereby increasing the life of the main battery pack 10 and the energy storage battery pack 20 and improving the user experience.

[0087] According to some embodiments of the present application, Figure 4 As shown, the main battery pack 10 of this embodiment further includes a signal output circuit 11, and the signal output circuit 11 is used to output a preset signal.

[0088] For example, the third pins of two corresponding switch elements 31 are connected through the third connection line 53 , so that the signal output circuit 11 transmits the preset signal to the signal receiving circuit 22 through the third connection line 53 .

[0089] According to some embodiments of the present application, Figure 6 and Figure 7 As shown, the signal receiving circuit 22 of this embodiment includes a photoelectric coupling circuit 221, a first switch circuit 222 and a second switch circuit 223. The input end of the photoelectric coupling circuit 221 receives a preset signal, and the output end of the photoelectric coupling circuit 221 is connected to the first control circuit 21 through the first switch circuit 222 and the second switch circuit 223.

[0090] The signal output circuit 11 of this embodiment includes a third switch circuit 111, and the input end of the third switch circuit 111 is connected to the second control circuit 12 of the main battery pack 10, wherein when the main battery pack 10 is electrically connected to the energy storage battery pack 20, the output end of the third switch circuit 111 is connected to the input end of the photoelectric coupling circuit 221.

[0091] In some embodiments, the main battery pack 10 is electrically connected to the energy storage battery pack 20 via a parallel line 50 and a switch assembly 30, and the output end of the third switch circuit 111 is connected to the input end of the photoelectric coupling circuit 221; wherein, the second control circuit 12 of the main battery pack 10 outputs a preset signal via the third switch circuit 111 so that the input end of the photoelectric coupling circuit 221 receives the preset signal.

[0092] According to some embodiments of the present application, Figure 6 and Figure 7 As shown, the photoelectric coupling circuit 221 of this embodiment includes a photoelectric coupler OC, a first diode D1, a second diode D2, a first capacitor C1, a first resistor R1, a second resistor R2 and a third resistor R3.

[0093] The first end of the photocoupler OC, one end of the first capacitor C1, and one end of the first resistor R1 are connected to the cathode of the first diode D1, and the anode of the first diode D2 receives a preset signal; wherein the anode of the first diode D2 serves as the input end of the photoelectric coupling circuit 221. The second end of the photocoupler OC, the other end of the first capacitor C1, and the other end of the first resistor R1 are grounded through the second resistor R2, the third end of the photocoupler OC is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to one end of the third resistor R3, the fourth end of the photocoupler OC is grounded, and the other end of the third resistor R3 serves as the output end of the photoelectric coupling circuit 221.

[0094] The first switch circuit 222 includes a first transistor Q1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a second capacitor C2. The base of the first transistor Q1 is connected to the other end of the third resistor R3 through the fourth resistor R4, the emitter of the first transistor Q1 is connected to the other end of the third resistor R3 through the fifth resistor R5, the collector of the first transistor Q1 is connected to one end of the sixth resistor R6, and one end of the second capacitor C2 is grounded. The emitter of the first transistor Q1 further receives a first voltage, which includes but is not limited to 3V.

[0095] The second switch circuit 223 includes a second triode Q2, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and a third capacitor C3. The base of the second triode Q2 is connected to the other end of the sixth resistor R6, the emitter of the second triode Q2 is grounded, the seventh resistor R7 is connected between the base and the emitter of the second triode Q2, the collector of the second triode Q2 is connected to the first control circuit 21 through the eighth resistor R8 and the tenth resistor R10, one end of the ninth resistor R9 receives the first voltage, the other end of the ninth resistor R9 is connected between the eighth resistor R8 and the tenth resistor R10, one end of the third capacitor C3 is connected between the eighth resistor R8 and the tenth resistor R10, and the other end of the third capacitor C3 is grounded.

[0096] The third switch circuit 111 includes a first MOS transistor M1, a second MOS transistor M2, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a third diode D3, a fourth diode D4, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18 and a nineteenth resistor R19.

[0097] One end of the sixteenth resistor R16 and one end of the eighteenth resistor R18 are connected to the anode of the first diode D1, the other end of the sixteenth resistor R16 is connected to the cathode of the fourth diode D4 through the seventeenth resistor R17, and the other end of the eighteenth resistor R18 is connected to the cathode of the fourth diode D4 through the nineteenth resistor R19. The drain of the first MOS tube M1 is connected to the anode of the fourth diode D4, the fourteenth resistor R14 is connected between the source and the gate of the first MOS tube M1, the cathode of the third diode D3 is connected to the source of the first MOS tube M1, the anode of the third diode D3 is connected to the gate of the first MOS tube M1, and the source of the first MOS tube M1 further receives a second voltage, which includes but is not limited to 5V. The gate of the first MOS tube M1 is connected to the drain of the second MOS tube M2 through the thirteenth resistor R13, the gate of the second MOS tube M2 is connected to the second control circuit 12 of the main battery pack 10 through the eleventh resistor R11, the source of the second MOS tube M2 is grounded, and the twelfth resistor R12 is connected between the source and the gate of the second MOS tube M2.

[0098] According to some embodiments of the present application, Figure 8 As shown, the switch detection circuit 40 of this embodiment includes a fourth switch circuit 41 and a ground circuit 42. The first end 33 of the switch element 31 is connected to the fourth switch circuit 41, and the second end 34 of the switch element 31 is connected to the ground circuit 42. When the button 32 is pressed, the fourth switch circuit 41, the switch element 31 and the ground circuit 42 form a detection loop.

[0099] In some embodiments, the first control circuit 21 is connected to the first end 33 of the switch element 31 through the fourth switch circuit 41, and the ground circuit 42 is connected to the second end 34 of the switch element 31. When the button 32 is pressed, the first end 33 and the second end 34 of the switch element 31 are connected, and at this time, the fourth switch circuit 41, the switch element 31 and the ground circuit 42 form a detection loop. For example, when the energy storage battery pack 20 is electrically disconnected from the parallel line 50, the button 32 is pressed, the first end 33 and the second end 34 of the switch element 31 are connected, the fourth switch circuit 41, the switch element 31 and the ground circuit 42 form a detection loop, and the first control circuit 21 receives a low level through the fourth switch circuit 41 and the ground circuit 42, that is, the first control circuit 21 receives a detection signal of a low level.

[0100] The switch detection circuit 40 of this embodiment includes a fourth switch circuit 41 and a ground circuit 42. The first end 33 of the switch element 31 is connected to the fourth switch circuit 41, and the second end 34 of the switch element 31 is connected to the ground circuit 42. When the button 32 is pressed, the fourth switch circuit 41, the switch element 31 and the ground circuit 42 form a detection loop, so that the first control circuit 21 can receive the detection signal and confirm that the main battery pack 10 and the energy storage battery pack 20 are disconnected through the detection signal.

[0101] According to some embodiments of the present application, Figure 8 As shown, the fourth switch circuit 41 of this embodiment includes a fifth diode D5, a twentieth resistor R20, a twenty-first resistor R21, a fourth capacitor C4, a twenty-second resistor R22, a third transistor Q3, a twenty-third resistor R23, a fifth capacitor C5, a twenty-fourth resistor R24, a fourth transistor Q4, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27 and a sixth capacitor C6.

[0102] Among them, the cathode of the fifth diode D5 is connected to the first end 33 of the switch element 31, the anode of the fifth diode D5 is connected to the base of the third triode Q3 through the twentieth resistor R20 and the twenty-first resistor R21, one end of the twenty-second resistor R22 is connected to the emitter of the third triode Q3, the other end of the twenty-second resistor R22 and one end of the fourth capacitor C4 are connected between the twentieth resistor R20 and the twenty-first resistor R21, the other end of the fourth capacitor C4 is grounded, and the emitter of the third triode Q3 further receives the first voltage. The collector of the third triode Q3 is connected to the base of the fourth triode Q4 through the twenty-third resistor R23, one end of the fifth capacitor C5 and one end of the twenty-fourth resistor R24 ​​are connected to the base of the fourth triode Q4, the other end of the fifth capacitor C5 and the other end of the twenty-fourth resistor R24 ​​are grounded, the collector of the fourth triode Q4 is connected to the first control circuit 21 through the twenty-fifth resistor R25 and the twenty-sixth resistor R26, one end of the twenty-seventh resistor R27 receives the first voltage, the other end of the twenty-seventh resistor R27 and one end of the sixth capacitor C6 are connected between the twenty-fifth resistor R25 and the twenty-sixth resistor R26, and the other end of the sixth capacitor C6 and the emitter of the fourth triode Q4 are grounded.

[0103] The grounding circuit 42 includes a twenty-eighth resistor R28 and a sixth diode D6 . The anode of the sixth diode D6 is connected to the second end 34 of the switch element 31 through the twenty-eighth resistor R28 , and the cathode of the sixth diode D6 is grounded.

[0104] According to some embodiments of the present application, the first control circuit 21 of this embodiment is further configured to not execute the step of detecting whether a preset signal is received within a first preset time in response to the detection signal when the detection signal is continuously detected within a second preset time. The first preset time includes but is not limited to 2 minutes, 3 minutes, or 4 minutes.

[0105] In some implementations, the first control circuit 21 is further configured to determine that the switch assembly 30 corresponding to the energy storage battery pack 20 is failed and remind the user to replace it when the detection signal is continuously detected within the second preset time. And / or, the second control circuit 12 of the main battery pack 10 is configured to determine that the switch assembly 30 corresponding to the main battery pack 10 is failed and remind the user to replace it when the detection signal is continuously detected within the second preset time.

[0106] The first control circuit 21 of this embodiment is also used for not executing the step of responding to the detection signal and detecting whether the preset signal is received within the first preset time when the detection signal is continuously detected within the second preset time. It can determine that the switch assembly 30 corresponding to the energy storage battery pack 20 has failed, remind the user to replace it, and improve the user's experience.

[0107] This application provides an energy storage system, see Figure 1 As shown, the energy storage system 100 of this embodiment includes a main battery pack 10 and an energy storage battery pack 20. When the energy storage battery pack 20 is installed in the energy storage system 100, it is electrically connected to the main battery pack 10. The energy storage battery pack 20 is the energy storage battery pack 20 disclosed in the above embodiment, and will not be described in detail here.

[0108] In some embodiments, Figure 2 As shown, the energy storage system 100 of this embodiment includes a main battery pack 10, a peripheral component 60 and an energy storage battery pack 20. When the energy storage battery pack 20 is installed in the energy storage system 100, the peripheral component 60 is electrically connected to the energy storage battery pack 20 and the main battery pack 10.

[0109] In summary, when the first control circuit 21 of the present application does not receive a preset signal within the first preset time, it confirms that the energy storage battery pack 20 and the main battery pack 10 are electrically disconnected, and can promptly prohibit the charging and discharging of the energy storage battery pack 20, thereby reducing the terminal sparking phenomenon when the energy storage battery pack 20 and the main battery pack 10 are reconnected, thereby increasing the life of the energy storage battery pack 20 and the main battery pack 10 and improving the user experience.

[0110] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An energy storage battery pack, applied to an energy storage system, the energy storage system comprising the energy storage battery pack and a main battery pack, the energy storage battery pack being electrically connected to the main battery pack when installed in the energy storage system, characterized in that: include: A switch detection circuit, the switch detection circuit is used to be electrically connected to the switch component, and the switch detection circuit is used to output a detection signal when the switch component is turned on, wherein the switch component is provided on the energy storage battery pack or an external device electrically connected to the energy storage battery pack; A signal receiving circuit, used for receiving a signal sent by the main battery pack; A first control circuit, electrically connected to the switch detection circuit and the signal receiving circuit, for determining, upon receiving the detection signal, whether the signal receiving circuit has received a preset signal sent by the main battery pack within a first preset time; When the preset signal is not received within the first preset time, charging and discharging of the energy storage battery pack are prohibited.

2. The energy storage battery pack according to claim 1, characterized in that: The external device includes the main battery pack or a peripheral component, and the peripheral component is used to electrically connect the energy storage battery pack and the main battery pack.

3. The energy storage battery pack according to claim 2, characterized in that: The peripheral component includes a parallel cable, the main battery pack and the energy storage battery pack are electrically connected through the parallel cable, the parallel cable includes a connecting terminal and a wire body, the wire body is connected to the connecting terminal, the connecting terminal is used to connect to the main battery pack and the energy storage battery pack, the switch assembly includes a switch element and a button, the first end and the second end of the switch element are both connected to the switch detection circuit, the button is connected to the switch element, and the button is protruding on the connecting end of the parallel cable, and the button is used to drive the switch element to conduct the detection loop formed with the switch detection circuit when being pressed, so that the switch detection circuit outputs the detection signal.

4. The energy storage battery pack according to claim 3, characterized in that: It includes two switch components, which are respectively arranged on the two connecting terminals of the parallel line, and the two buttons are respectively protruded on the side walls of the two connecting terminals of the parallel line. The wire body includes a first connecting wire and a second connecting wire. The first end of the switch component includes a first pin, and the second end of the switch component includes a second pin. The first connecting wire is used to connect the first pins of the two switch components accordingly, and the second connecting wire is used to connect the second pins of the two switch components accordingly.

5. An energy storage battery pack, applied to an energy storage system, the energy storage system comprising the energy storage battery pack, a peripheral component and a main battery pack, when the energy storage battery pack is installed in the energy storage system, the peripheral component is electrically connected to the energy storage battery pack and the main battery pack, characterized in that: include: The input interface is electrically connected to the peripheral component; A signal receiving circuit, used for receiving a signal sent by the main battery pack; a first control circuit, electrically connected to the input interface and the signal receiving circuit, for receiving a detection signal output by the peripheral component / the main battery pack, and upon receiving the detection signal, determining whether the signal receiving circuit has received a preset signal sent by the main battery pack within a first preset time; When the preset signal is not received within the first preset time, charging and discharging of the energy storage battery pack are prohibited.

6. The energy storage battery pack according to claim 5, characterized in that: The peripheral component includes a parallel line, the main battery pack and the energy storage battery pack are electrically connected through the parallel line, and a switch component and a switch detection circuit are arranged on the parallel line; the switch component is used to be disconnected when not pressed and to be turned on when pressed, the switch detection circuit is used to be electrically connected to the switch component, and the switch detection circuit is used to output the detection signal when the switch component is turned on.

7. The energy storage battery pack according to claim 5, characterized in that: The peripheral components include a parallel control device, the two parallel ports of the parallel control device are electrically connected to the main battery pack and the energy storage battery pack respectively, the output port of the parallel control device is used to supply power to the outside, and the parallel control device is provided with a switch component and a switch detection circuit; the switch component is used to disconnect when not pressed and to turn on when pressed, the switch detection circuit is used to be electrically connected to the switch component, and the switch detection circuit is used to output the detection signal when the switch component is turned on.

8. The energy storage battery pack according to claim 5, characterized in that: When the peripheral component is electrically connected to the main battery pack and the energy storage battery pack, the main battery pack includes: a switch assembly and a switch detection circuit; the switch assembly is used to be disconnected when not pressed and to be turned on when pressed, the switch detection circuit is used to be electrically connected to the switch assembly, and the switch detection circuit is used to output the detection signal when the switch assembly is turned on.

9. The energy storage battery pack according to any one of claims 6 to 8, characterized in that: The switch assembly includes a switch element and a button, wherein the first end and the second end of the switch element are both connected to the switch detection circuit, and the button is connected to the switch element. When the button is pressed, the switch element is driven to conduct a detection loop formed with the switch detection circuit so that the switch detection circuit outputs the detection signal.

10. The energy storage battery pack according to claim 3 or 9, characterized in that: The switch element comprises a micro switch.

11. The energy storage battery pack according to claim 1 or 5, characterized in that: The energy storage battery pack also includes a charging MOS tube and a discharging MOS tube connected in sequence. The first control circuit is used to control the charging MOS tube and the discharging MOS tube to be disconnected when it is determined that the preset signal is not received within the first preset time.

12. The energy storage battery pack according to claim 1 or 5, characterized in that: The signal receiving circuit includes a photoelectric coupling circuit, a first switching circuit and a second switching circuit. The input end of the photoelectric coupling circuit receives the preset signal, and the output end of the photoelectric coupling circuit is connected to the first control circuit of the energy storage battery pack through the first switching circuit and the second switching circuit.

13. The energy storage battery pack according to claim 12, characterized in that: The main battery pack further includes a signal output circuit and a second control circuit, the second control circuit is electrically connected to the signal output circuit, and the signal output circuit is used to output the preset signal according to the control of the second control circuit; The signal output circuit includes a third switch circuit, an input end of the third switch circuit is connected to the second control circuit, wherein when the main battery pack is electrically connected to the energy storage battery pack, the output end of the third switch circuit is connected to the input end of the photoelectric coupling circuit.

14. The energy storage battery pack according to claim 13, characterized in that: The photoelectric coupling circuit includes a photoelectric coupler, a first diode, a second diode and a first capacitor, the first end of the photoelectric coupler and one end of the first capacitor are connected to the cathode of the first diode, the anode of the first diode receives the preset signal, the second end of the photoelectric coupler and the other end of the first capacitor are both grounded, the third end of the photoelectric coupler is connected to the cathode of the second diode, the anode of the second diode is connected to the output end of the photoelectric coupling circuit, and the fourth end of the photoelectric coupler is grounded; The first switch circuit includes a first transistor and a second capacitor, the base of the first transistor and the emitter of the first transistor are both connected to the output end of the photoelectric coupling circuit, and the emitter of the first transistor is also used to receive a first voltage, the collector of the first transistor is connected to the second switch circuit, and one end of the second capacitor is grounded; The second switching circuit includes a second transistor and a third capacitor, the base of the second transistor is connected to the collector of the first transistor, the emitter of the second transistor is grounded, the collector of the second transistor is connected to the first control circuit, the collector of the second transistor is also used to receive a second voltage, one end of the third capacitor is connected to the collector of the second transistor, and the other end of the third capacitor is grounded.

15. The energy storage battery pack according to claim 14, characterized in that: The third switch circuit includes a first MOS tube, a second MOS tube, a third diode and a fourth diode, the fourth diode is connected to the anode of the first diode, the drain of the first MOS tube is connected to the anode of the fourth diode, the cathode of the third diode is connected to the source of the first MOS tube, the anode of the third diode is connected to the gate of the first MOS tube, the gate of the first MOS tube is connected to the drain of the second MOS tube, the gate of the second MOS tube is connected to the second control circuit, and the source of the second MOS tube is grounded.

16. The energy storage battery pack according to claim 1 or 5, characterized in that: The switch detection circuit includes a fourth switch circuit and a ground circuit. The first end of the switch element is connected to the fourth switch circuit, and the second end of the switch element is connected to the ground circuit. When the button is pressed, the fourth switch circuit, the switch element and the ground circuit form the detection loop.

17. The energy storage battery pack according to claim 16, characterized in that: The fourth switch circuit includes a fifth diode, a fourth capacitor, a third transistor, a fifth capacitor, a fourth transistor and a sixth capacitor, the cathode of the fifth diode is connected to the first end of the switch element, the anode of the fifth diode is connected to the base of the third transistor, the emitter of the third transistor is connected to the anode of the fifth diode, and the emitter of the third transistor is also used to receive a third voltage, one end of the fourth capacitor is connected to the anode of the fifth diode, the other end of the fourth capacitor is grounded, the collector of the third transistor is connected to the base of the fourth transistor, one end of the fifth capacitor is connected to the base of the fourth transistor, the other end of the fifth capacitor is grounded, the collector of the fourth transistor is connected to the first control circuit, and the collector of the fourth transistor also receives the first voltage, one end of the sixth capacitor is connected to the collector of the fourth transistor, and the other end of the sixth capacitor and the emitter of the fourth transistor are grounded; The grounding circuit includes a sixth diode, an anode of the sixth diode is connected to the second end of the switch element, and a cathode of the sixth diode is grounded.

18. The energy storage battery pack according to claim 1 or 5, characterized in that: The first control circuit is further configured to not execute the step of detecting whether a preset signal is received within a first preset time in response to the detection signal when the detection signal is continuously detected within a second preset time.

19. An energy storage system, characterized in that: It comprises an energy storage battery pack and a main battery pack as described in any one of claims 1 to 18, and the energy storage battery pack is electrically connected to the main battery pack when installed in the energy storage system.

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