Battery pack and energy storage device

Abstract

The utility model provides a battery pack with a compact structure and an energy storage device. The battery pack comprises a shell, a panel, a battery module, a battery management module, a fuse module and a leakage current detection module, the shell is provided with an opening, the battery module, the fuse module and the leakage current detection module are all contained in the shell, the panel covers the opening, the battery module and the panel are arranged in the first direction, and the battery management module is arranged in the second direction. The panel extends along a second direction perpendicular to the first direction; the leakage current detection module comprises a first circuit board and a leakage current detection device, the first circuit board is located between the battery module and the panel, the leakage current detection device is arranged on the side, facing the panel, of the first circuit board in a protruding mode, the fuse module is arranged on the first circuit board, and the battery management module, the fuse module and the leakage current detection device are sequentially arranged in the second direction. Fusion of multifunctional modules and a high volume utilization rate are realized through a compact structural layout.

Description

Technical Field

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

[0002] Considering the product safety performance, a safety detection module needs to be set up inside the battery pack to monitor and protect the battery pack in a timely manner, such as a battery management module. With higher requirements for battery safety, the battery pack needs to integrate more safety detection modules. However, the internal space of the battery pack is limited. How to integrate more safety detection modules in the same internal space without affecting the energy density of the battery pack has become a relatively large challenge. Utility Model Content

[0003] The embodiments of the present application provide a battery pack and an energy storage device, which can improve the utilization rate of internal space.

[0004] In the first aspect, an embodiment of the present application provides a battery pack, which includes a shell, a panel, a battery module, a battery management module, a fuse module and a leakage current detection module, the shell has an opening, the battery module, the fuse module and the leakage current detection module are all accommodated in the shell, the panel cover is arranged in the opening, the battery module and the panel are arranged along a first direction, and the panel extends along a second direction perpendicular to the first direction; the leakage current detection module includes a first circuit board and a leakage current detection device, the first circuit board is located between the battery module and the panel, the leakage current detection device is protruding on the side of the first circuit board facing the panel, the fuse module is arranged on the first circuit board, and the battery management module, the fuse module and the leakage current detection device are arranged in sequence along the second direction.

[0005] The battery pack provided by the present application integrates more safety detection modules for monitoring and protecting the battery pack, such as a battery management module, a leakage current detection module, and a fuse module, thereby improving the safety and reliability of the battery pack. The fuse module is arranged on the first circuit board, and the battery management module, the fuse module, and the leakage current detection device are arranged in sequence along the second direction, which is conducive to improving the compactness of the structure in the battery pack and improving the internal space utilization of the battery pack, so as not to affect the energy density of the battery pack when integrating multiple safety detection modules. The integration of multifunctional modules and high volume utilization are achieved through a compact structural layout.

[0006] According to the first aspect, in a possible implementation of the present application, the battery pack also includes an insulating bracket accommodated in the shell, the insulating bracket is located between the battery module and the panel in the first direction, the insulating bracket is connected to the inner wall of the shell to form a first accommodation cavity and a second accommodation cavity arranged along the first direction, the battery management module, the leakage current detection module, and the fuse module are all accommodated in the first accommodation cavity, the battery module is accommodated in the second accommodation cavity, and the battery management module and the first circuit board are both fixed to the insulating bracket.

[0007] In this possible implementation, the battery management module, fuse module and leakage current detection module are all fixed on the insulating bracket. During assembly, the battery management module, fuse module and leakage current detection module can be first arranged on the insulating bracket to form a whole to facilitate installation and disassembly.

[0008] Since the battery management module, the leakage current detection module, the fuse module and other functional modules are arranged in the first receiving cavity, and the battery module is arranged in the second receiving cavity, in other words, the battery module and other non-battery module functional modules are arranged in separate cavities. On the one hand, the separate cavity setting is conducive to reducing the heat transfer between the battery module and other functional modules. On the other hand, when condensation occurs in the battery module due to environmental factors, the possibility of short circuit, failure and other faults of the components in the functional module is reduced, which is conducive to improving the safety and reliability of the battery pack.

[0009] According to the first aspect, in a possible implementation of the present application, the insulating bracket includes a mounting portion and a supporting portion, the supporting portion is located between the battery module and the panel, the supporting portion and the inner wall of the shell form the first accommodating cavity and the second accommodating cavity, the battery management module and the first circuit board are arranged on the supporting portion, the mounting portion and the supporting portion are fixedly connected on one side of a third direction and extend toward the panel, the mounting portion is in contact with the inner wall of the shell, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

[0010] In this possible implementation, the mounting portion fits against the inner wall of the shell, thereby increasing the contact area between the insulating bracket and the shell and improving the position stability of the insulating bracket in the shell.

[0011] According to the first aspect, in a possible implementation of the present application, a first mounting boss is protruding from the side of the support portion facing the panel, and the first mounting boss is located between the battery management module and the first circuit board in the second direction; a second mounting boss is protruding from the side of the first circuit board facing the panel, and the fuse module is fixed on the first mounting boss and the second mounting boss.

[0012] In this possible implementation, the fuse module is fixed to the first mounting boss and the second mounting boss, that is, the fuse module is fixed to the insulating bracket and the first circuit board, which is beneficial to improving the stability of the fuse module on the insulating bracket.

[0013] According to the first aspect, in a possible implementation of the present application, the support portion protrudes toward one side of the panel and forms a first wire threading groove, the opening of the first wire threading groove faces the battery module, and the side of the mounting portion away from the inner wall of the first accommodating cavity forms a second wire threading groove extending along the second direction, and the first mounting boss is provided with an accommodating space, and the first wire threading groove and the second wire threading groove are connected to the accommodating space; the battery pack also includes a power row, and the power row is arranged through the first wire threading groove, the second wire threading groove and the accommodating space, and the power row is used to electrically connect the battery module and the fuse module.

[0014] In this possible implementation, the power row used to electrically connect the battery module and the fuse module is insulated and isolated from the functional module in the first receiving cavity by an insulating bracket, thereby reducing the contact risk between the power row and the functional module in the first receiving cavity, which is beneficial to improving the safety and reliability of the battery pack.

[0015] According to the first aspect, in a possible implementation of the present application, a power output hole is provided on the panel; the battery pack also includes a power terminal assembly, the power terminal assembly includes a protective cover and a power terminal, the protective cover is fixedly connected to the first circuit board, the leakage current detection device is accommodated in the protective cover, the protective cover is located between the first circuit board and the panel in the first direction, the power terminal is protruded on the side of the protective cover facing the panel, the power terminal is passed through the power output hole and connected to the fuse module, and the power terminal is used to output electrical energy.

[0016] In this possible implementation, the protective cover is fixedly connected to the first circuit board, the leakage current detection device is accommodated in the protective cover, and the protective cover is located between the first circuit board and the panel in the first direction, which is beneficial to improving the structural compactness of the battery pack in the first direction.

[0017] According to the first aspect, in a possible implementation of the present application, the panel includes a plate body and a first protrusion, the plate body is fixedly connected to the shell and covers the opening, the first protrusion is protruding on the side of the plate body facing the battery module; the battery pack also includes an active balancing module, the active balancing module and the power terminal assembly are arranged along the second direction, the active balancing module includes an active balancing circuit board and an active balancing terminal, the active balancing circuit board is connected to the side of the first protrusion away from the plate body, the active balancing terminal is arranged on the side of the active balancing circuit board facing the plate body, and the active balancing circuit board is located between the battery management module and the plate body in the first direction; the plate body is provided with a connecting port, and the active balancing terminal is passed through the connecting port for connecting with an active balancing module of another battery pack.

[0018] In this possible implementation, an active balancing module is added to the battery pack, and the active balancing module is used to balance the voltage and power balance between the battery packs in the battery pack cluster. The active balancing module is arranged on the panel, and the active balancing module and the power terminal assembly are arranged along the second direction, which is conducive to improving the internal space utilization of the battery pack. In addition, the active balancing module is arranged on the panel. During assembly, the active balancing module can be assembled on the panel first, and then the panel and the active balancing module can be assembled in the shell, which improves the assembly convenience of the battery pack.

[0019] According to the first aspect, in a possible implementation of the present application, the first protrusion and the plate body form a storage space, the panel further includes a second protrusion, the second protrusion is protruding from the side of the plate body facing the battery module and is accommodated in the storage space, the second protrusion forms the connection port, the active balancing terminal is passed through an end of the second protrusion away from the plate body, and the opening of the connection port is located on a side of the plate body away from the insulating bracket.

[0020] In this possible implementation, the first convex portion and the plate body together form a receiving space for receiving the active balancing module and the second convex portion. Since the active balancing module and the second convex portion are received in the receiving space formed by the first convex portion, interference between the active balancing module and other functional modules is reduced.

[0021] According to the first aspect, in a possible implementation of the present application, the side wall of the connection port includes a first connection hole, a second connection hole, a third connection hole and a fourth connection hole; the active balancing terminal includes an input positive terminal, an input negative terminal, an output positive terminal, and an output negative terminal, the input positive terminal is passed through the first connection hole, the input negative terminal is passed through the second connection hole, the output positive terminal is passed through the third connection hole, and the output negative terminal is passed through the fourth connection hole.

[0022] In this possible implementation, the input and output positive and negative terminals of the active balancing module are both arranged at the same connection port, which improves the simplicity of the panel interface and facilitates the wiring between the battery packs of the battery pack cluster.

[0023] According to the first aspect, in a possible implementation manner of the present application, the connection port and the power output hole are respectively located at two ends of the panel in the second direction.

[0024] In this possible implementation, the connection port and the power output hole are respectively located at two ends of the panel in the second direction, thereby improving the simplicity of the interface of the panel.

[0025] According to the first aspect, in a possible implementation of the present application, the board body also includes a communication terminal mounting hole, and the battery pack also includes a communication terminal, the communication terminal is arranged on a side of the active balancing circuit board facing the board body and is passed through the communication terminal mounting hole, and the communication terminal is used for terminal docking of a cable or an external device to achieve a communication connection between the battery pack and the external device.

[0026] In this possible implementation, the communication terminal is provided to achieve a communication connection between the battery pack and an external device.

[0027] According to the first aspect, in a possible implementation of the present application, the board body further includes a fire module mounting hole, the battery pack further includes a fire module, and the fire module is disposed on the board body and penetrates the fire module mounting hole.

[0028] In this possible implementation, the fire protection module is provided to sense whether a fire occurs in the battery pack, which is beneficial to improving the safety and reliability of the battery pack.

[0029] According to the first aspect, in a possible implementation of the present application, the communication terminal mounting hole, the connection port, the fire module mounting hole, and the power output hole are arranged along the second direction, or the connection port, the communication terminal mounting hole, the power output hole, and the fire module mounting hole are arranged along the second direction.

[0030] In this possible implementation, each interface or hole connected to an external cable or device is arranged along the second direction, which further improves the simplicity of the panel interface and improves the regularity of the wiring harness when the wiring harness is connected to each interface.

[0031] According to the first aspect, in a possible implementation of the present application, the battery pack further includes a seal, the seal is located between an end surface of the shell facing the panel and the panel, and the seal is arranged around the opening.

[0032] In this possible implementation, the seal is used to achieve a sealed connection between the shell and the panel to improve the sealing of the battery pack and reduce the entry of water vapor into the shell.

[0033] In a second aspect, an embodiment of the present application provides a battery pack, comprising a shell, an active balancing module, a power terminal assembly and a panel, wherein the shell has an opening, the panel covers the opening, the active balancing module and the power terminal assembly are both accommodated in the shell, the panel comprises a connection port and a power output hole, the active balancing terminal of the active balancing module is passed through the connection port, the active balancing terminal is used to be electrically connected to another battery pack, and the power terminal of the power terminal assembly is passed through the power output hole for outputting electrical energy.

[0034] In a battery cluster including multiple battery packs, the voltage and power of the multiple battery packs are not balanced, which will cause the overall charge and discharge capacity of the battery cluster to decrease. The battery pack provided in the present application is provided with an active balancing module that can be electrically connected to other battery packs. The active balancing module is used to balance the voltage and power between the battery packs, which can improve the charge and discharge capacity of the battery cluster.

[0035] According to the second aspect, in a possible implementation of the present application, in the length extension direction of the panel, the power output hole is located at a first end of the panel, and the connection port is located at a second end of the panel.

[0036] In this possible implementation, the connection port and the power output hole are respectively located at two ends of the panel in the length direction of the panel, thereby improving the simplicity of the panel interface.

[0037] According to the second aspect, in a possible implementation of the present application, the panel is further provided with a communication terminal mounting hole, and the battery pack further includes a communication terminal, and the communication terminal is inserted into the communication terminal mounting hole.

[0038] In this possible implementation, the communication terminal is provided to achieve a communication connection between the battery pack and an external device.

[0039] According to the second aspect, in a possible implementation of the present application, the panel further includes a fire module mounting hole, the battery pack further includes a fire module, and the fire module is disposed on the plate body and penetrates the fire module mounting hole.

[0040] In this possible implementation, the fire protection module is provided to sense whether a fire occurs in the battery pack, which is beneficial to improving the safety and reliability of the battery pack.

[0041] According to the second aspect, in a possible implementation of the present application, the communication terminal mounting hole, the connection port, the fire module mounting hole, and the power output hole are arranged along the length direction of the panel, or the connection port, the communication terminal mounting hole, the power output hole, and the fire module mounting hole are arranged along the length direction.

[0042] In this possible implementation, each interface or hole connected to an external cable or device is arranged along the second direction, which further improves the simplicity of the panel interface and improves the regularity of the wiring harness when the wiring harness is connected to each interface.

[0043] According to the second aspect, in a possible implementation of the present application, the side wall of the connection port includes a first connection hole, a second connection hole, a third connection hole and a fourth connection hole; the active balancing terminal includes an input positive terminal, an input negative terminal, an output positive terminal, and an output negative terminal, the input positive terminal is passed through the first connection hole, the input negative terminal is passed through the second connection hole, the output positive terminal is passed through the third connection hole, and the output negative terminal is passed through the fourth connection hole.

[0044] In this possible implementation, the input and output positive and negative terminals of the active balancing module are both arranged at the same connection port, which improves the simplicity of the panel interface and facilitates the wiring between the battery packs of the battery pack cluster.

[0045] According to the second aspect, in a possible implementation of the present application, the first connection hole and the second connection hole are arranged in a row along the length direction, the third connection hole and the fourth connection hole are arranged in a row along the length direction, the first connection hole and the third connection hole are arranged in a column along the height direction of the panel, and the second connection hole and the fourth connection hole are arranged in a column along the height direction of the panel.

[0046] In this possible implementation, the first connection hole, the second connection hole, the third connection hole, and the fourth connection hole are arranged in a square matrix, which is beneficial to further improve the regularity of the wiring harness when the terminals are connected.

[0047] According to the second aspect, in a possible implementation of the present application, the power output hole includes a first power output hole and a second power output hole arranged along the height direction, the power terminal includes a positive power terminal and a negative power terminal, the positive power terminal is passed through the first power output hole, and the negative power terminal is passed through the second power output hole.

[0048] In this possible implementation, the first power output hole and the second power output hole are arranged along the height direction of the panel, which is beneficial to further improve the regularity of the wiring harness when the terminals are connected.

[0049] According to the second aspect, in a possible implementation of the present application, the panel includes a plate body and a first protrusion, the plate body is fixedly connected to the shell and covers the opening; the active balancing module also includes an active balancing circuit board, the active balancing circuit board is connected to a side of the first protrusion away from the plate body, and the active balancing terminal is arranged on a side of the active balancing circuit board facing the plate body; the connection port and the power output hole are arranged on the plate body.

[0050] In this possible implementation, the active balancing module is arranged on the panel, and the active balancing module and the power terminal assembly are arranged along the second direction, which is conducive to improving the internal space utilization of the battery pack. In addition, the active balancing module is arranged on the panel, and during assembly, the active balancing module can be assembled on the panel first, and then the panel and the active balancing module are assembled in the shell, which improves the convenience of assembling the battery pack.

[0051] According to the second aspect, in a possible implementation of the present application, the battery pack also includes a battery management module, a fuse module and a leakage current detection module, and the battery management module, the fuse module and the leakage current detection module are all accommodated in the shell, and the leakage current detection devices of the battery management module, the fuse module and the leakage current detection module are arranged in sequence along the length direction of the panel, the active balancing circuit board is located between the battery management module and the panel, and part of the power terminal assembly is located between the leakage current detection module and the panel.

[0052] In this possible implementation, more safety detection modules for monitoring and protecting the battery pack are integrated, such as a battery management module, a leakage current detection module, and a fuse module, thereby improving the safety and reliability of the battery pack. The fuse module is arranged on the first circuit board, and the battery management module, the fuse module, and the leakage current detection device are arranged in sequence along the second direction, which is conducive to improving the compactness of the structure in the battery pack and improving the internal space utilization of the battery pack, so as not to affect the energy density of the battery pack when integrating multiple safety detection modules.

[0053] In a third aspect, the present application provides an energy storage device, comprising at least two battery packs according to the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of the framework structure of a photovoltaic system is shown;

[0055] Figure 2 is a three-dimensional schematic diagram of a battery pack provided in one embodiment of the present application;

[0056] Figure 3 is a three-dimensional exploded schematic diagram of a battery pack provided in one embodiment of the present application;

[0057] Figure 4 is an exploded schematic diagram of a partial structure of a battery pack provided in one embodiment of the present application;

[0058] Figure 5 is along Figure 2 The cross-sectional view obtained by the line AA;

[0059] Figure 6 It is a three-dimensional schematic diagram of the battery management module, leakage current detection module, power terminal assembly, and battery module assembled together;

[0060] Figure 7 It is a three-dimensional schematic diagram of a battery pack provided by an embodiment of the present application, omitting the housing, panel, and power row;

[0061] Figure 8 is an exploded schematic diagram of a partial structure of a battery pack provided in one embodiment of the present application;

[0062] Fig. 9 is a front view of a panel of a battery pack provided in one embodiment of the present application;

[0063] Fig.10 is a three-dimensional schematic diagram of a communication terminal provided in one embodiment of the present application;

[0064] Fig.11 It is a three-dimensional exploded schematic diagram of a panel, an active balancing module, and a seal of a battery pack provided in one embodiment of the present application;

[0065] Fig.12 is a front view of a panel of a battery pack provided by some possible implementations of the present application;

[0066] Fig.13 is a front view of a panel of a battery pack provided by some possible implementations of the present application;

[0067] Fig.14 1 is a front view of a panel of a battery pack provided by some possible implementations of the present application. DETAILED DESCRIPTION

[0068] Figure 1 A schematic diagram of the framework structure of a photovoltaic system is shown. Figure 1As shown, the photovoltaic system includes a photovoltaic array 110, a power converter 120, an energy storage device 150, and a power grid 130 / external load 140. Among them, the power converter 120 can integrate a DC / DC conversion circuit and a DC / AC conversion circuit, and the energy storage device 150 can be located between the DC / DC conversion circuit and the DC / AC conversion circuit. The electric energy generated by the photovoltaic array 110 can be charged to the energy storage device 150 after being stepped up or stepped down by the DC / DC conversion circuit. When the electric energy generated by the photovoltaic array 110 is not enough to power the power grid 130 / external load 140, the electric energy stored in the energy storage device 150 can be transmitted to the power grid 130 / external load 140 through the DC / AC conversion circuit in the power converter 120. On the other hand, the energy storage device 150 can also receive power from the power grid 130. The alternating current output by the power grid 130 is converted into direct current after passing through the DC / AC conversion circuit and transmitted to the energy storage device 150, so as to charge the energy storage device 150. Alternatively, the power converter 120 only includes a DC / AC conversion circuit, the energy storage device 150 has a built-in DC / DC conversion circuit, and the energy storage device 150 directly receives the DC power generated by the photovoltaic array 110. It can be understood that the energy storage device 150 can also be used in application scenarios such as wind power systems, and the application scenario of the energy storage device 150 is not limited in this application.

[0069] The energy storage device 150 includes a plurality of battery packs 100 , which are stacked and arranged so that the number of the battery packs 100 can be increased or decreased arbitrarily to adaptively adjust the capacity of the energy storage device 150 .

[0070] Considering the product safety performance, a safety detection module needs to be set up inside the battery pack to monitor and protect the battery pack in a timely manner, such as a battery management module. With higher requirements for battery safety, the battery pack needs to integrate more safety detection modules. However, the internal space of the battery pack is limited. How to integrate more safety detection modules in the same internal space without affecting the energy density of the battery pack has become a relatively large challenge.

[0071] Based on this, see Figure 2 and Figure 3 The battery pack 100 provided in some embodiments of the present application includes a housing 21, a panel 23, a battery module 27 and a functional module 30. Figure 3 and Figure 4The housing 21 has an opening 210, and the panel 23 is covered on the opening 210 and fixedly connected to the housing 21. The functional module 30 includes a battery management module 32, a leakage current detection module 33 and a fuse module 34. The battery module 27, the fuse module 34 and the leakage current detection module 33 are all accommodated in the housing 21. The battery module 27 and the panel 23 are arranged along the first direction Y. The leakage current detection module 33 includes a first circuit board 331 and a leakage current detection device 333, the first circuit board 331 is located between the battery module 27 and the panel 23, the leakage current detection device 333 is convexly arranged on the side of the first circuit board 331 facing the panel 23, and the fuse module 34 is arranged on the first circuit board 331. In some embodiments of the present application, the fuse module 34 is fixedly connected to the first circuit board 331 by screws. It can be understood that the present application does not limit the fixed connection method between the fuse module 34 and the leakage current detection module 33. The battery management module 32, the fuse module 34 and the leakage current detection device 333 are arranged in sequence along the second direction X. The length of the panel 23 may extend along the second direction X. In other words, the length direction of the panel 23 is the second direction X. The height of the panel 23 may extend along the third direction Z. In other words, the height direction of the panel 23 is the third direction Z. The third direction Z is perpendicular to the first direction Y, and the third direction Z is perpendicular to the second direction X.

[0072] The battery management module 32 (Battery Management Unit, BMU) can monitor the operating status of the battery module 27, thereby ensuring the safe and reliable operation of the battery module 27, intelligently manage and maintain each battery cell in the battery module 27, and can monitor and collect the state parameters of the battery module 27 in real time. The state parameters include but are not limited to the voltage, temperature, current, SOC, SOH, etc. of the battery cell, and perform necessary analysis and calculation on the parameters of the relevant state to obtain more system state evaluation parameters, and realize effective management of the battery module 27 according to a specific protection control strategy to ensure the safe and reliable operation of the battery module 27. The leakage current detection module 33 is used to detect the leakage current in the battery pack 100, and can detect the safety problems caused by the ground short circuit between the battery packs 100. The fuse module 34 is used to prevent the current in the battery pack 100 from being too large and protect the safety of the battery pack 100. When an overload, short circuit or other fault occurs in the circuit of the battery pack 100, the fuse module 34 can quickly cut off the current to avoid the expansion of the fault and damage to the battery pack 100.

[0073] The battery pack 100 provided in the present application integrates a variety of safety detection modules for monitoring and protecting the battery pack 100, such as a battery management module 32, a leakage current detection module 33, and a fuse module 34, thereby improving the safety and reliability of the battery pack 100. The fuse module 34 is arranged on the first circuit board 331, and the battery management module 32, the fuse module 34, and the leakage current detection device 333 are arranged in sequence along the second direction X, which is conducive to improving the compactness of the structure in the battery pack 100 and improving the internal space utilization of the battery pack 100, so as not to affect the energy density of the battery pack 100 when integrating a variety of safety detection modules.

[0074] Please refer to Figure 4 , Figure 5 and Figure 6 The battery pack 100 also includes an insulating bracket 26 accommodated in the shell 21. The insulating bracket 26 is located between the battery module 27 and the panel 23 in the first direction Y. The insulating bracket 26 is connected to the inner wall of the shell 21 to form a first accommodating cavity 212 and a second accommodating cavity 214 arranged along the first direction Y. The opening 210 is connected to the first accommodating cavity 212 to facilitate the insulating bracket 26 to enter or exit the shell 21. The first accommodating cavity 212 and the second accommodating cavity 214 are separated. The first accommodating cavity 212 is used to accommodate the functional module 30. The second accommodating cavity 214 is used to accommodate the battery module 27. The functional modules 30 such as the battery management module 32, the leakage current detection module 33, and the fuse module 34 are all accommodated in the first accommodating cavity 212, the battery module 27 is accommodated in the second accommodating cavity 214, and the battery management module 32 and the first circuit board 331 are both fixed to the insulating bracket 26.

[0075] The battery management module 32, the leakage current detection module 33 and the fuse module 34 are all fixed on the insulating bracket 26. When assembling, the battery management module 32, the fuse module 34 and the leakage current detection module 33 can be first arranged on the insulating bracket 26 to form a whole for easy installation and removal. The fuse module 34 can be connected in series to the leakage current detection module 33 and the negative electrode of the battery module 27.

[0076] Since the functional module 30 is arranged in the first receiving cavity 212, and the battery module 27 is arranged in the second receiving cavity 214, in other words, the battery module 27 and other non-battery functional modules 30 are arranged in separate cavities. On the one hand, the separate cavity arrangement is conducive to reducing the heat transfer between the battery module 27 and other functional modules 30. On the other hand, when condensation occurs in the battery module 27 due to environmental factors, the possibility of short circuit, failure and other faults of the components in the functional module 30 is reduced, which is conducive to improving the safety and reliability of the battery pack 100.

[0077] The insulating bracket 26 includes a mounting portion 262 and a supporting portion 264, and the supporting portion 264 is located between the battery module 27 and the panel 23. The supporting portion 264 and the inner wall of the housing 21 enclose a first receiving cavity 212 and a second receiving cavity 214. The battery management module 32 and the first circuit board 331 are arranged on the supporting portion 264. In some embodiments of the present application, the first circuit board 331 can be arranged on the supporting portion 264 by means of screws or the like. The supporting portion 264 is also provided with a first mounting boss 2642 on one side facing the panel 23, and the first mounting boss 2642 is located between the battery management module 32 and the first circuit board 331 in the second direction, and the first circuit board 331 is provided with a second mounting boss 3313 on one side facing the panel 23, and the fuse module 34 is fixed on the first mounting boss 2642 and the second mounting boss 3313. The fuse module 34 is fixed to the first mounting boss 2642 and the second mounting boss 3313, that is, the fuse module 34 is fixed to the insulating bracket 26 and the first circuit board 331, which is conducive to improving the position stability of the fuse module 34 in the housing 21. The present application does not limit the structure of the insulating bracket 26. For example, the insulating bracket 26 can omit the mounting portion 262, and the support portion 264 is connected to the inner wall of the housing 21.

[0078] The mounting portion 262 is fixedly connected to the support portion 264 on one side of the third direction Z and extends toward the panel 23, and the mounting portion 262 is in contact with the inner wall of the housing 21. The mounting portion 262 is in contact with the inner wall of the housing 21, which increases the contact area between the insulating bracket 26 and the housing 21 and improves the position stability of the insulating bracket 26 in the housing 21.

[0079] The battery pack 100 also includes a power row 28, which is used to electrically connect the fuse module 34 and the battery module 27. The support portion 264 protrudes toward one side of the panel 23 and surrounds a first threading groove 2646 for inserting the power row 28. The opening of the first threading groove 2646 faces the battery module 27, and the side of the mounting portion 262 away from the inner wall of the first receiving cavity 212 forms a second threading groove 2647 extending along the second direction for inserting the power row 28. The first mounting boss 2642 is provided with an accommodating space 2645, and the first threading groove 2646 and the second threading groove 2647 are connected to the accommodating space 2645. The power row 28 can be a curved structure. The power row 28 is inserted in the first threading groove 2646, the second threading groove 2647 and the accommodating space 2645, and the power row 28 electrically connects the battery module 27 and the fuse module 34. The power row 28 can be a copper row or a conductive row made of other conductive materials. The power row 28 for electrically connecting the battery module 27 and the fuse module 34 is insulated and isolated from the first receiving cavity 212 by the insulating bracket 26, thereby reducing the risk of contact between the power row 28 and the functional module 30 in the first receiving cavity 212, which is beneficial to improving the safety and reliability of the battery pack 100. The power row 28 can be fixed to the fuse module 34 by screws.

[0080] Please refer to Figure 4 , Figure 7 and Figure 8 , the functional module 30 also includes a power terminal assembly 36. The power terminal assembly 36 includes a protective cover 361 and a power terminal 363. The protective cover 361 is fixedly connected to the first circuit board 331. The leakage current detection device 333 is accommodated in the protective cover 361. The protective cover 361 is located between the first circuit board 331 and the panel 23 in the first direction Y. The power terminal 363 is convexly arranged on the side of the protective cover 361 facing the panel 23. The power terminal 363 is penetrated through the power output hole 2324. The power terminal 363 can be connected to the leakage current detection module 33 through the power row 28. The power terminal 363 is used to output electric energy. The protective cover 361 is fixedly connected to the first circuit board 331. The leakage current detection device 333 is accommodated in the protective cover 361. The protective cover 361 is located between the first circuit board 331 and the panel 23 in the first direction Y, which is conducive to improving the structural compactness of the battery pack in the first direction Y.

[0081] In a battery cluster consisting of multiple battery packs, the voltage and charge of the multiple battery packs are not balanced, which will cause the overall charge and discharge capacity of the battery cluster to decrease. Figure 4 The functional module 30 further includes an active balancing module 37, which is arranged with the power terminal assembly 36 along the second direction X and penetrates the panel 23. The active balancing module 37 is used to connect with another battery pack 100 to balance the voltage and power between the battery packs 100 of the battery cluster. For example, after a battery cluster including multiple battery packs 100 is charged for a period of time, the power of some battery packs 100 has reached 100%, and the power of the remaining battery packs 100 is not fully charged. Under the action of the active balancing modules 37 of each battery pack 100, the power of each battery pack 100 can be balanced.

[0082] The battery pack 100 provided in the present application is further provided with an active balancing module 37 , which is used to balance the voltage and power between the battery packs 100 , thereby improving the overall charge and discharge capacity of the battery cluster including multiple battery packs 100 .

[0083] In some embodiments of the present application, the panel 23 can be formed by die casting, sheet metal and other processes. The panel 23 includes a plate body 232 and a first protrusion 234. The plate body 232 is fixedly connected to the housing 21 and covers the opening 210. The plate body 232 can be connected to the housing 21 by screws, clamping and other means. The first protrusion 234 is protruding on the side of the plate body 232 facing the battery module 27. The first protrusion 234 and the plate body 232 enclose a storage space. The active balancing module 37 includes an active balancing circuit board 372 and an active balancing terminal 374. The active balancing circuit board 372 is connected to the side of the first protrusion 234 away from the plate body 232. The active balancing terminal 374 is provided on the side of the active balancing circuit board 372 facing the plate body 232 and is partially accommodated in the storage space. The active balancing circuit board 372 is located between the battery management module 32 and the plate body 232 in the first direction. The plate body 232 is provided with a connection port 2322 and a power output hole 2324, and the active balancing terminal 374 is provided through the connection port 2322 for connecting with the active balancing module of another battery pack. The active balancing module 37 is provided on the panel 23, and the active balancing module 37 and the power terminal assembly 36 are arranged along the second direction, which is conducive to improving the internal space utilization of the battery pack 100. In addition, the active balancing module 37 is provided on the panel 23. During assembly, the active balancing module 37 can be assembled on the panel 23 first, and then the panel 23 and the active balancing module 37 can be assembled in the housing 21, which improves the assembly convenience of the battery pack 100.

[0084] The panel 23 further includes a second protrusion 236, which is protruding from the side of the plate body 232 facing the insulating bracket 26 and is accommodated in the accommodation space. The second protrusion 236 surrounds a connection port 2322. The active balancing terminal 374 is penetrated at one end of the second protrusion 236 away from the plate body 232. The opening of the connection port 2322 is located on the side of the plate body 232 away from the insulating bracket 26. The first protrusion 234 and the plate body 232 together surround an accommodation space for accommodating the active balancing module 37 and the second protrusion 236. Since the active balancing module 37 and the second protrusion 236 are accommodated in the accommodation space surrounded by the first protrusion 234, the interference between the active balancing module 37 and other functional modules 30 is reduced.

[0085] See also Fig. 9 The connection port 2322 and the power output hole 2324 are respectively located at two ends of the panel 23 in the second direction X, which is conducive to improving the simplicity of the interface of the panel 23. Each terminal passes through the corresponding hole of the panel 23 to form an interface connected to an external cable or device.

[0086] In some embodiments of the present application, the side wall of the connection port 2322 includes a first connection hole 2331, a second connection hole 2332, a third connection hole 2333 and a fourth connection hole 2334. The active equalization terminal 374 (eg Figure 4The active balancing module 37 includes an input positive terminal 3741, an input negative terminal 3742, an output positive terminal 3743, and an output negative terminal 3744. The input positive terminal 3741 is inserted into the first connection hole 2331, the input negative terminal 3742 is inserted into the second connection hole 2332, the output positive terminal 3743 is inserted into the third connection hole 2333, and the output negative terminal 3744 is inserted into the fourth connection hole 2334. The input and output positive and negative terminals of the active balancing module 37 are both arranged at the same connection port 2322, which improves the simplicity of the interface of the panel and facilitates the wiring between the active balancing modules 37 of the battery packs of the battery cluster. The first connection hole 2331 and the second connection hole 2332 may be arranged in a row along the second direction X, the third connection hole 2333 and the fourth connection hole 2334 may be arranged in a row along the second direction X, the first connection hole 2331 and the third connection hole 2333 may be arranged in a row along the third direction Z, and the second connection hole 2332 and the fourth connection hole 2334 may be arranged in a row along the third direction Z. It can be understood that the present application does not limit the arrangement of the first connection hole 2331, the second connection hole 2332, the third connection hole 2333 and the fourth connection hole 2334.

[0087] The power output hole 2324 includes a first power output hole 2335 and a second power output hole 2336 arranged in the height direction of the panel 23, and the power terminal 363 includes a positive power terminal 3631 and a negative power terminal 3633, the positive power terminal 3631 is passed through the first power output hole 2335, and the negative power terminal 3633 is passed through the second power output hole 2336. The present application does not limit the first power output hole 2335 and the second power output hole 2336 to be arranged in the height direction, and the power terminal 363 can pass through the panel 23.

[0088] The plate body 232 further includes a communication terminal mounting hole 2326. The communication terminal mounting hole 2326, the connection port 2322 and the power output hole 2324 are arranged along the second direction X. The battery pack 100 further includes a communication terminal 381, such as Fig. 9 and Fig.10 As shown, the communication terminal 381 is arranged on the side of the active balancing circuit board 372 facing the board body 232 and is penetrated through the communication terminal mounting hole 2326. Exemplarily, the number of the communication terminals 381 can be two, the number of the communication terminal mounting holes 2326 is two, and the two communication terminal mounting holes 2326 are arranged in a row along the third direction Z. The present application does not limit the number and arrangement of the communication terminals 381, and the present application does not limit the number and arrangement of the communication terminal mounting holes 2326.

[0089] In some implementations of this application, please refer to Figure 4 and Fig.11The battery pack 100 further includes a seal 25, which is located between the end surface of the housing 21 facing the panel 23 and the panel 23, and is disposed around the opening 210. The seal 25 is used to achieve a sealed connection between the housing 21 and the panel 23, so as to improve the sealing of the battery pack 100 and reduce the entry of water vapor into the housing 21. The seal 25 may be a colloid, which is bonded between the end surface of the housing 21 facing the panel 23 and the panel 23, thereby achieving a sealed connection between the panel 23 and the housing 21. The seal 25 may also be a sealing structure such as a sealing ring.

[0090] It is understandable that the insulating bracket 26 can be omitted, and the battery module 27 and the multiple functional modules 30 can be directly set in the shell 21.

[0091] For some possible implementations, see Fig.12 and Fig.13 , the battery pack 100 also includes a fire protection module 39, which is used to detect whether a fire occurs in the battery pack 100. The plate body of the panel 23 also includes a fire protection module mounting hole 2328, and the fire protection module 39 is arranged on the plate body 232 and penetrates the fire protection module mounting hole 2328. The fire protection module 39 of the battery pack 100 is a device for safety protection of the battery pack 100. It mainly detects and responds to abnormal conditions that may occur in the battery pack 100 during the charging and discharging process, such as overheating, short circuit, overcharging, etc., in a timely manner to prevent the occurrence of dangerous situations such as fire. The fire protection module 39 of the battery pack 100 usually includes multiple sensors. Among them, the sensor is used to monitor parameters such as temperature, voltage, current, and smoke concentration of the battery pack 100.

[0092] The communication terminal installation hole 2326 , the connection port 2322 , the fire module installation hole 2328 , and the power output hole 2324 are arranged along the second direction X.

[0093] The present application does not limit the arrangement of the active balancing module 37, the power terminal assembly 36, the communication terminal 381, and the fire module 39 in the housing 21. The present application does not limit the arrangement of the communication terminal mounting hole 2326, the connection port 2322, the fire module mounting hole 2328, and the power output hole 2324 of the panel 23. In some possible implementations, please refer to Fig.14 The connection port 2322, the communication terminal mounting hole 2326, the power output hole 2324, and the fire module mounting hole 2328 are arranged along the second direction X to further improve the simplicity of the interface of the panel 23 and improve the regularity of the wiring harness when the wiring harness is connected to each interface.

[0094] It should be understood that expressions such as "including" and "may include" that may be used in the present application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In the present application, terms such as "including" and / or "having" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components, or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0095] In addition, in the present application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0096] In the present application, expressions including ordinal numbers such as "first" and "second" may modify various elements. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements. For example, a first user device and a second user device indicate different user devices, although the first user device and the second user device are both user devices. Similarly, without departing from the scope of the present application, a first element may be referred to as a second element, and similarly, a second element may also be referred to as a first element.

[0097] When a component is referred to as being "connected" or "accessed" to another component, it should be understood that the component is not only directly connected to or accessed to the other component, but also another component may exist between the component and the other component. On the other hand, when a component is referred to as being "directly connected" or "directly accessed" to another component, it should be understood that there is no component between them.

[0098] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery pack, characterized in that: The battery pack comprises a shell, a panel, a battery module, a battery management module, a fuse module and a leakage current detection module, the shell has an opening, the battery module, the fuse module and the leakage current detection module are all accommodated in the shell, the panel cover is arranged at the opening, the battery module and the panel are arranged in a first direction, and the panel extends in a second direction perpendicular to the first direction; The leakage current detection module includes a first circuit board and a leakage current detection device, the first circuit board is located between the battery module and the panel, the leakage current detection device is protruded on the side of the first circuit board facing the panel, the fuse module is arranged on the first circuit board, and the battery management module, the fuse module and the leakage current detection device are arranged in sequence along the second direction.

2. The battery pack according to claim 1, characterized in that: The battery pack also includes an insulating bracket accommodated in the shell, the insulating bracket is located between the battery module and the panel in the first direction, the insulating bracket is connected to the inner wall of the shell and encloses a first receiving cavity and a second receiving cavity arranged along the first direction, the battery management module, the leakage current detection module, and the fuse module are all accommodated in the first receiving cavity, the battery module is accommodated in the second receiving cavity, and the battery management module and the first circuit board are both fixed to the insulating bracket.

3. The battery pack according to claim 2, characterized in that: The insulating bracket includes a mounting portion and a supporting portion, the supporting portion is located between the battery module and the panel, the supporting portion and the inner wall of the shell form the first accommodating cavity and the second accommodating cavity, the battery management module and the first circuit board are arranged on the supporting portion, the mounting portion and the supporting portion are fixedly connected on one side of a third direction and extend toward the panel, the mounting portion is in contact with the inner wall of the shell, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

4. The battery pack according to claim 3, characterized in that: A first mounting boss is also protruded from one side of the support portion facing the panel, and the first mounting boss is located between the battery management module and the first circuit board in the second direction; A second mounting boss is protruding from one side of the first circuit board facing the panel, and the fuse module is fixed on the first mounting boss and the second mounting boss.

5. The battery pack according to claim 4, characterized in that: The support portion protrudes toward one side of the panel and forms a first threading groove, the opening of the first threading groove faces the battery module, the side of the mounting portion away from the inner wall of the first receiving cavity forms a second threading groove extending along the second direction, the first mounting boss is provided with an accommodating space, and the first threading groove and the second threading groove are connected to the accommodating space; The battery pack further includes a power row, wherein the power row is passed through the first wire threading groove, the second wire threading groove and the accommodating space, and the power row is used for electrically connecting the battery module and the fuse module.

6. The battery pack according to claim 1, characterized in that: The panel is provided with a power output hole; The battery pack also includes a power terminal assembly, which includes a protective cover and a power terminal. The protective cover is fixedly connected to the first circuit board, and the leakage current detection device is accommodated in the protective cover. The protective cover is located between the first circuit board and the panel in the first direction. The power terminal is protruding on the side of the protective cover facing the panel, and the power terminal is penetrated through the power output hole. The power terminal is used to output electrical energy.

7. The battery pack according to claim 6, characterized in that: The panel includes a plate body and a first convex portion, the plate body is fixedly connected to the shell and covers the opening, and the first convex portion is convexly arranged on a side of the plate body facing the battery module; The battery pack further comprises an active balancing module, wherein the active balancing module and the power terminal assembly are arranged along the second direction, wherein the active balancing module comprises an active balancing circuit board and an active balancing terminal, wherein the active balancing circuit board is connected to a side of the first protrusion away from the board body, wherein the active balancing terminal is arranged on a side of the active balancing circuit board facing the board body, and wherein the active balancing circuit board is located between the battery management module and the board body in the first direction; The plate body is provided with a connection port, and the active equalization terminal is passed through the connection port for connecting with an active equalization module of another battery pack.

8. The battery pack according to claim 7, characterized in that: The first convex portion and the plate body form a receiving space, the panel further includes a second convex portion, the second convex portion is protrudingly arranged on a side of the plate body facing the battery module and is received in the receiving space, the second convex portion forms the connecting port, the active balancing terminal is passed through an end of the second convex portion away from the plate body, and the opening of the connecting port is located on a side of the plate body away from the battery module.

9. The battery pack according to claim 7, characterized in that: The side wall of the connection port includes a first connection hole, a second connection hole, a third connection hole and a fourth connection hole; The active balancing terminal includes an input positive terminal, an input negative terminal, an output positive terminal, and an output negative terminal. The input positive terminal is inserted through the first connection hole, the input negative terminal is inserted through the second connection hole, the output positive terminal is inserted through the third connection hole, and the output negative terminal is inserted through the fourth connection hole.

10. The battery pack according to claim 9, characterized in that: The connection port and the power output hole are respectively located at two ends of the panel in the second direction.

11. The battery pack according to claim 7, characterized in that: The board body further includes a communication terminal mounting hole, and the battery pack further includes a communication terminal, which is arranged on a side of the active balancing circuit board facing the board body and penetrates the communication terminal mounting hole.

12. The battery pack according to claim 11, characterized in that: The plate body also includes a fire module mounting hole, and the battery pack also includes a fire module. The fire module is arranged on the plate body and penetrates the fire module mounting hole. The fire module is used to sense whether a fire occurs in the battery pack.

13. The battery pack according to claim 12, characterized in that: The communication terminal installation hole, the connection port, the fire module installation hole, and the power output hole are arranged in an array along the second direction, or, The connection port, the communication terminal mounting hole, the power output hole, and the fire module mounting hole are arranged along the second direction.

14. The battery pack according to claim 1, characterized in that: The battery pack further includes a sealing member, wherein the sealing member is located between an end surface of the shell facing the panel and the panel, and the sealing member is disposed around the opening.

15. A battery pack, characterized in that: The battery pack includes a shell, an active balancing module, a power terminal assembly and a panel. The shell has an opening, and the panel covers the opening. The active balancing module and the power terminal assembly are both accommodated in the shell. The panel includes a connection port and a power output hole. The active balancing terminal of the active balancing module is passed through the connection port. The active balancing terminal is used to be electrically connected to another battery pack. The power terminal of the power terminal assembly is passed through the power output hole to output electrical energy.

16. The battery pack according to claim 15, characterized in that: In the length extension direction of the panel, the power output hole is located at the first end of the panel, and the connection port is located at the second end of the panel.

17. The battery pack according to claim 16, characterized in that: The panel is also provided with a communication terminal mounting hole, and the battery pack also includes a communication terminal, and the communication terminal is inserted into the communication terminal mounting hole.

18. The battery pack according to claim 17, characterized in that: The panel also includes a fire module installation hole, and the battery pack also includes a fire module. The fire module is arranged on the panel and penetrates the fire module installation hole. The fire module is used to sense whether a fire occurs in the battery pack.

19. The battery pack according to claim 18, characterized in that: The communication terminal mounting hole, the connection port, the fire module mounting hole, and the power output hole are arranged in a row along the length direction of the panel, or, The connection port, the communication terminal mounting hole, the power output hole, and the fire module mounting hole are arranged along the length direction.

20. The battery pack according to claim 15, characterized in that: The side wall of the connection port includes a first connection hole, a second connection hole, a third connection hole and a fourth connection hole; The active balancing terminal includes an input positive terminal, an input negative terminal, an output positive terminal, and an output negative terminal. The input positive terminal is inserted through the first connection hole, the input negative terminal is inserted through the second connection hole, the output positive terminal is inserted through the third connection hole, and the output negative terminal is inserted through the fourth connection hole.

21. The battery pack according to claim 20, characterized in that: The first connection hole and the second connection hole are arranged in a row along the length direction of the panel, the third connection hole and the fourth connection hole are arranged in a row along the length direction, the first connection hole and the third connection hole are arranged in a column along the height direction of the panel, and the second connection hole and the fourth connection hole are arranged in a column along the height direction of the panel.

22. The battery pack according to claim 15, characterized in that: The power output hole includes a first power output hole and a second power output hole arranged along the height direction of the panel, and the power terminal includes a positive power terminal and a negative power terminal. The positive power terminal is inserted into the first power output hole, and the negative power terminal is inserted into the second power output hole.

23. The battery pack according to claim 15, characterized in that: The panel includes a plate body and a first protrusion, wherein the plate body is fixedly connected to the shell and covers the opening; The active balancing module further includes an active balancing circuit board, the active balancing circuit board is connected to a side of the first protrusion away from the board body, and the active balancing terminal is arranged on a side of the active balancing circuit board facing the board body; The connection port and the power output hole are arranged on the plate body.

24. The battery pack according to claim 23, characterized in that: The battery pack also includes a battery management module, a fuse module and a leakage current detection module, wherein the battery management module, the fuse module and the leakage current detection module are all accommodated in the shell, and the leakage current detection devices of the battery management module, the fuse module and the leakage current detection module are arranged in sequence along the length direction of the panel, the active balancing circuit board is located between the battery management module and the panel, and part of the power terminal assembly is located between the leakage current detection module and the panel.

25. An energy storage device, characterized in that: The energy storage device comprises at least two battery packs according to any one of claims 1-24.

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