A circuit connection device, a battery module and an electrical device

Abstract

The present application relates to the field of battery protection technology, and in particular to a circuit connection device, a battery module and an electrical device; the circuit connection device comprises a first component and a second component which are sequentially stacked along a first direction, the first component is conductive, the first component comprises a first section, a second section and a third section, the first section and the second section are spaced apart from each other on the first component, and the third section is connected to the first section and the second section respectively; the second component is provided with a boss extending toward the first component, and when observed along the first direction, the boss and the third section at least partially overlap; along the first direction, there is a gap between the boss and the third section, the first component and the second component can approach each other, and the boss is configured to be able to squeeze each other with the third section to break the third section, thereby disconnecting the electrical connection between the first section and the second section, thereby disconnecting the charging circuit.

Description

Technical Field

[0001] The present application relates to the field of battery protection technology, and in particular to a circuit connection device, a battery module and an electrical device. Background Art

[0002] Soft-pack power batteries are prone to thermal runaway after being overcharged, posing a safety hazard. The existing technology mainly uses BMS to detect voltage, temperature, gas, etc. After detecting an abnormality, the BMS controls the charging circuit to disconnect, thereby achieving the purpose of preventing overcharging. However, this solution relies on BMS hardware for detection and control. If the detection hardware or control hardware fails, the overcharge prevention function will directly fail. In particular, when users use non-standard chargers, it is easy for the control hardware to be broken down, resulting in the inability to disconnect the charging circuit, thereby causing a safety accident. Summary of the invention

[0003] The main technical problem solved by the embodiments of the present application is to provide a circuit connection device that can disconnect the charging circuit after an abnormality occurs in the battery, thereby extending the working life of the disconnection function.

[0004] In order to solve the above technical problems, a technical solution adopted by the embodiment of the present application is: to provide a circuit connection device, the circuit connection device includes a first member and a second member stacked in sequence along a first direction, the first member is conductive, the first member includes a first section, a second section and a third section, the first section and the second section are arranged at intervals, and the third section is connected to the first section and the second section respectively; the second member is provided with a boss extending toward the first member, and the boss and the third section at least partially overlap when viewed along the first direction; along the first direction, there is a gap between the boss and the third section, the first member and the second member can approach each other, and the boss is configured to be able to press against the third section to break the third section, thereby disconnecting the electrical connection between the first section and the second section. By setting the boss and the third section, they can press against each other and break the third section, thereby disconnecting the electrical connection between the first section and the second section, and realizing circuit disconnection; if it is set in a battery module and electrically connected to the charging circuit of the battery module, it can realize the disconnection of the charging circuit, and reduce battery overcharging and other situations.

[0005] In some examples, the circuit connection device further includes a third member, and the third member is disposed between the first member and the second member along the first direction. By providing the third member, it is possible to reduce the situation where the first member and the second member approach each other under slight force, causing the boss to contact the third section and break the third section, thereby reducing the frequent occurrence of unnecessary circuit breaks and improving the reliability of the circuit connection device.

[0006] In some examples, a first hole is formed on the third member; when viewed along the first direction, the boss is at least partially located in the first hole, and the first hole is used for allowing the boss to pass through and contact the third section when the first member is subjected to a force acting toward the second member, and / or when the second member is subjected to a force acting toward the first member. The first hole is provided to allow the boss to contact the third section.

[0007] In some examples, the first component also includes a first insulating portion, the third section is disposed on the first insulating portion, the first section includes a first connecting portion disposed on the first insulating portion and a first extending portion extending from the first insulating portion, and the second section includes a second connecting portion disposed on the first insulating portion and a second extending portion extending from the first insulating portion.

[0008] In some examples, the first member further includes a second insulating portion, the first insulating portion and the second insulating portion are overlapped along the first direction and jointly clamp the first connecting portion, the second connecting portion and the third segment. By providing the first insulating portion and the second insulating portion, the first segment, the second segment and the third segment can be clamped and fixed, and the first through hole is provided, the first through hole is used to expose the third segment so that the boss can contact the third segment.

[0009] In some examples, the first insulating portion and the second insulating portion include insulating materials. By providing the insulating materials, the insulating effect between the first segment, the second segment, and the third segment can be enhanced.

[0010] In some examples, a spike portion is provided at one end of the boss facing the first member. By providing the spike portion, the pressure of the boss on the third section can be more concentrated, so that the third section can be more easily broken, and the situation where the third section cannot be broken due to excessive expansion of the battery cell is reduced, that is, the situation where the circuit cannot be disconnected is reduced, thereby increasing the reliability of the circuit connection device.

[0011] In some examples, the third member is elastic. By providing the third member with elasticity, elastic support for the first member and the second member can be achieved.

[0012] In some examples, the third member includes foam. By providing the third member including foam material, the first member and the second member can be elastically supported, and the first member and the second member can be prevented from squeezing the third section and breaking the third section when subjected to slight pressure, thereby reducing unnecessary circuit breakage and improving the reliability of the circuit connection device.

[0013] In some examples, the third member includes a spring, and the spring is supported between the first member and the second member. The spring can realize elastic support for the first member and the second member.

[0014] In some examples, an insulating material is disposed on a side of the third component close to the first component. By disposing the insulating material, the insulation effect between the third component and the first component can be enhanced.

[0015] In some examples, the third component is made of insulating material. By making it of insulating material, the insulation effect between the third component and the first component can be enhanced.

[0016] In some examples, the third member includes a first portion and a second portion that are separated from each other, and when viewed along the first direction, the first portion and the second portion are located on both sides of the boss, respectively. By dividing the third member into the first portion and the second portion, and providing a gap between the first portion and the second portion, the boss can pass through, so that the boss can contact the third section.

[0017] Another technical solution adopted in the embodiment of the present application is: providing a battery module, the battery module includes a shell and a battery cell assembly, the battery cell assembly is accommodated in the shell, the battery module also includes the circuit connection device as described above, the circuit connection device is electrically connected to the battery cell assembly. The battery module is provided with the circuit connection device, and when the battery cell assembly expands to a certain extent, the boss and the third section can be thinned and squeezed, and the third section can be broken, thereby reducing the overcharging of the battery cell and protecting the battery module.

[0018] In some examples, the battery cell assembly includes a plurality of battery cells, the plurality of battery cells are stacked in sequence along the first direction, the circuit connection device is disposed between two adjacent battery cells, and when the battery cell expands, the battery cell presses the circuit connection device, the boss presses the third section, and the third section is broken, thereby disconnecting the battery cell assembly.

[0019] In some examples, the battery cell assembly includes a plurality of battery cells, and the plurality of battery cells are stacked in sequence along the first direction. Along the first direction, the circuit connection device is disposed between the inner wall of the shell and the battery cell assembly, and the circuit connection device is electrically connected to the battery cell assembly through the first section and the second section. By disposing the circuit connection device between the battery cell and the inner wall of the shell, the battery cell cooperates with the shell to squeeze the circuit connection device, and the first component and the second component are brought close to each other, the boss on the second component will break the third section on the first component, so that the electrical connection between the first section and the second section is disconnected.

[0020] In order to solve the above technical problems, another technical solution adopted in the implementation mode of the present application is: to provide an electrical device, wherein the electrical device includes the battery module as described above.

[0021] The circuit connection device, battery module and electrical equipment of the present application are provided with a first component and a second component, and the first component includes a third section electrically connected to the first section and the second section, and the second component is provided with a boss, and the first component and the second component can move close to each other, and drive the boss and the third section to be squeezed against each other, so that the third section breaks, thereby disconnecting the electrical connection between the first section and the second section; when the circuit connection device is electrically connected to the battery cells of the battery module through the first section and the second section, and the circuit connection device is provided between the battery cells or between the battery cells and the shell wall of the battery module, the expansion of the battery can squeeze the circuit connection device, thereby breaking the third section, realizing the disconnection of the charging circuit, and improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0023] Figure 1 is a schematic structural diagram of a circuit connection device according to an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the circuit connection device of the embodiment of the present application:

[0025] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the first component;

[0026] Figure 4 yes Figure 3 A schematic diagram of the structure of the first section, the second section and the third section;

[0027] Figure 5 yes Figure 2 A partially enlarged structural diagram of the second component;

[0028] Figure 6 is a schematic structural diagram of a third component in another embodiment of the present application;

[0029] Figure 7 It is a structural schematic diagram of the cooperation between the battery cell assembly and the circuit connection device of the embodiment of the present application;

[0030] Figure 8 is a partial cross-sectional schematic diagram of a battery module according to an embodiment of the present application;

[0031] Fig. 9 It is a partial cross-sectional schematic diagram of a battery module according to another embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that, if there is no conflict, the various features in the embodiments of the present application can be combined with each other, all within the scope of protection of the present application. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order than the module division in the device schematic diagram or the order in the flow chart.

[0034] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0035] like Figures 1 to 3As shown, the embodiment of the present application provides a circuit connection device 100, which includes a first component 1 and a second component 2 stacked in sequence along a first direction X. The first component 1 and the second component 2 are connected to each other, and the first component 1 and the second component 2 can be close to or away from each other along the first direction X; when the circuit connection device 100 is placed in a battery module, the battery cells of the battery module expand and squeeze the circuit connection device 100, so that the first component 1 and the second component 2 are close to each other.

[0036] In some embodiments, the first component 1 and the second component 2 are both in sheet shape.

[0037] In some embodiments, the first member 1 and the second member 2 are connected by a snap-fit, and the snap-fit ​​limits the distance between the first member 1 and the second member 2, and the first member 1 and the second member 2 can move closer to or away from each other within the limited distance.

[0038] like Figure 3 As shown, for the first component 1, the first component 1 is conductive, and includes a first section 11, a second section 12, and a third section 13. The first section 11 and the second section 12 are arranged at intervals, and the third section 13 is connected to the first section 11 and the second section 12, respectively. The first section 11, the second section 12, and the third section 13 are all conductors, which are used to be electrically connected to the battery cells of the battery module. When the third section 13 is broken, the charging circuit of the battery cell can be disconnected, thereby reducing the thermal runaway of the battery cell and ensuring the safety of the battery module and the people around it.

[0039] In some embodiments, the third section 13 is made of fragile material.

[0040] In some embodiments, the first segment 11, the second segment 12 and the third segment 13 are in strip shape, the first segment 11 and the second segment 12 are arranged in parallel, and two ends of the third segment 13 are vertically connected to the first segment 11 and the second segment 12 respectively.

[0041] In some embodiments, two ends of the third segment 13 are connected to one end of the first segment 11 and one end of the second segment 12 respectively.

[0042] In some embodiments, two ends of the third section 13 are connected to the middle of the first section 11 and the second section 12 respectively.

[0043] like Figure 2 and Figure 3As shown, for the second member 2, the second member 2 is provided with a boss 21 extending toward the first member 1, and the boss 21 and the third section 13 at least partially overlap when viewed along the first direction X. There is a gap between the boss 21 and the third section 13 along the first direction X. Along the first direction X, the first member 1 and the second member 2 can move closer to each other, and the boss 21 is configured to be able to press against the third section 13 to break the third section 13, thereby disconnecting the electrical connection between the first section 11 and the second section 12.

[0044] When viewed along the first direction X, the boss 21 and the third section 13 at least partially overlap, so that when the boss 21 moves relative to the third section 13 along the first direction X and approaches the third section 13, it can contact the third section 13, thereby breaking the third section 13. When the first component 1 and the second component 2 are not subjected to external force, a gap may be provided between the boss 21 and the third section 13 to reduce the possibility of the boss 21 squeezing the third section 13 due to vibration or thermal expansion reaction, thereby reducing the probability of unnecessary erroneous circuit breaking and increasing reliability.

[0045] In some embodiments, the first member 1 includes the first insulating portion 14, and the first section 11, the second section 12 and the third section 13 are arranged on the first insulating portion 14. Optionally, the first member 1 includes the second insulating portion 15, and the first section 11, the second section 12 and the third section 13 are arranged on the second insulating portion 15. Optionally, the first member 1 includes the first insulating portion 14 and the second insulating portion 15, the first insulating portion 14 and the second insulating portion 15 are overlapped along the first direction X and jointly clamp the first section 11, the second section 12 and the third section 13, one end of the first section 11 extends out of the first member 1, and one end of the second section 12 extends out of the first member 1. The first insulating portion 14 and the second insulating portion 15 are used to clamp and fix the first section 11, the second section 12 and the third section 13, and the first insulating portion 14 and the second insulating portion 15 are arranged along the first direction X. Along a direction perpendicular to the first direction X, one end of each of the first section 11 and the second section 12 extends out of the first insulating portion 14 and the second insulating portion 15 , so as to facilitate connection with the connection bus of the battery cell.

[0046] like Figure 4As shown, in some embodiments, the first segment 11 includes a first connecting portion 111 provided on the first insulating portion 14 and a first extending portion 112 extending from the first insulating portion 14 , and the second segment 12 includes a second connecting portion 121 provided on the first insulating portion 14 and a second extending portion 122 extending from the first insulating portion 14 .

[0047] In some embodiments, the first insulating portion 14 and the second insulating portion 15 include insulating materials to insulate the first segment 11, the second segment 12, and the third segment 13. By providing the insulating materials, the insulating effect 13 between the first segment 11, the second segment 12, and the third segment can be enhanced.

[0048] In some embodiments, the first insulating portion 14 and the second insulating portion 15 are made by injection molding, and during the injection molding process, the first section 11 and the second section 12 are partially located in the injection mold cavity, and the third section 13 is located in the injection mold cavity.

[0049] like Figure 3 As shown, in some embodiments, at least one of the first insulating portion 14 and the second insulating portion 15 is provided with a first through hole 141 / 151 along the first direction X, and the third section 13 is at least partially exposed to the first through hole 141 / 151. When both the first insulating portion 14 and the second insulating portion 15 are provided with the first through hole 141 / 151, along the first direction X, the first through hole 141 and the first through hole 151 overlap, and when the first insulating portion 14 and the second insulating portion 15 are attached along the first direction X, the first through hole 141 can be connected to the first through hole 151. The third section 13 is at least partially exposed in the first through hole 141 / 151. When viewed along the first direction X, the boss 21 is located in the first through hole 141 / 151, and the first through hole 141 / 151 is used for the boss 21 to pass through and contact the third section 13 when the first member 1 is subjected to a force acting toward the second member 2, and / or when the second member 2 is subjected to a force acting toward the first member 1. Optionally, the inner diameter of the first through hole 141 / 151 is greater than or equal to the width of the third section 13. In this way, when the boss 21 squeezes the third section 13, the third section 13 can be broken from the middle. Optionally, the first insulating portion 14 and the second insulating portion 15 do not have the first through hole 141 / 151, and the boss 21 can directly pierce the first insulating portion 14 and / or the second insulating portion 15.

[0050] In some embodiments, the third segment 13 is completely exposed in the first through hole 141 / 151, and one end of the first segment 11 and the second segment 12 extends into the first through hole 141 / 151 and is electrically connected to the third segment 13, so that when the boss 21 squeezes the third segment 13, the third segment 13 can be broken or separated from at least one of the first segment 11 and the second segment 12.

[0051] In some embodiments, the rated pressure for breaking the third section 13 can be adjusted by adjusting the inner diameter of the first through hole 141 / 151; or the rated pressure for breaking the third section 13 can be adjusted by adjusting the material, thickness and width of the third section 13, which can be applied to different battery modules or other various application scenarios.

[0052] like Figure 5 As shown, in some embodiments, a spike portion 211 is provided at one end of the boss 21 facing the first member 1. By providing the spike portion 211, the stress can be more concentrated when the boss 21 squeezes the third section 13, so that the third section 13 can be broken more easily, thereby increasing reliability. It can be understood that the rated pressure for breaking the third section 13 can be adjusted by adjusting the shape of the spike portion 211, such as the extension length of the spike portion 211 and the tapered angle of the tip of the spike portion 211, and can be applied to different battery modules or other various application scenarios.

[0053] In some embodiments, the spike portion 211 is a plurality of needle-like protrusions arranged at intervals; or, the spike portion 211 is blade-shaped; or, the spike portion 211 is frustum-shaped.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the circuit connection device 100 further includes a third member 3, and the third member 3 is disposed between the first member 1 and the second member 2 along the first direction X. In some embodiments, along the first direction X, the first member 1 and the second member 2 are respectively adhered to two sides of the third member 3, thereby achieving connection between the first member 1 and the second member 2.

[0055] In some embodiments, the third component 3 is elastic, so that the first component 1 and the second component 2 can be moved closer to or farther from each other.

[0056] In some embodiments, an insulating material is disposed on a side of the third member 3 close to the first member 1. By disposing the insulating material, the insulation effect between the third member 3 and the first member 1 can be enhanced.

[0057] In some embodiments, the third member 3 is made of insulating material. In some embodiments, when the third member 3 is pressed by the boss 21 , the boss 21 can pierce through the third member 3 .

[0058] like Figure 2 As shown, in some embodiments, the third member 3 is provided with a first hole 31; along the first direction X, the boss 21 is at least partially located in the first hole 31, that is, the boss 21 overlaps with the first hole 31, and the first hole 31 is used for the boss 21 to pass through and contact the third section 13 when the first member 1 is subjected to a force acting toward the second member 2, and / or when the second member 2 is subjected to a force acting toward the first member 1. Optionally, when viewed along the first direction X, the boss 21 is located in the first hole 31, and along the first direction X, the profile of the first hole 31 is larger than the profile of the boss 21, and the positions of the first hole 31 and the boss 21 correspond, so that the boss 21 can pass through the first hole 31 to contact and break the third section 13. Optionally, the first hole 31 penetrates the third member 3 along the first direction. Optionally, the first hole 31 does not penetrate the third member 3 along the first direction.

[0059] like Figure 6 As shown, in some embodiments, the third member 3 includes a first portion 32 and a second portion 33 that are separated from each other, and the first portion 32 and the second portion 33 are respectively located on both sides of the boss 21 when viewed along the first direction X. The boss 21 passes through the gap between the first portion 32 and the second portion 33, thereby contacting and breaking the third section 13.

[0060] In some embodiments, the third member 3 comprises foam.

[0061] In some embodiments, the third member 3 includes a spring, and the spring is supported between the first member 1 and the second member 2. By changing the number and specifications of the springs, the external rated extrusion force that causes the third section 13 to break can be adjusted, which can be applied to different battery modules or other various application scenarios.

[0062] like Figures 7 to 9As shown, the embodiment of the present application further provides a battery module 200, the battery module 200 includes a shell 201, a battery cell assembly 202 and the circuit connection device 100 as described above, the battery cell assembly 202 is accommodated in the shell 201, and the circuit connection device 100 is electrically connected to the battery cell assembly 202.

[0063] In some embodiments, the circuit connection device 100 is in direct contact with the battery cell assembly 202 .

[0064] like Figure 7 and Figure 8 As shown, in some embodiments, the battery cell assembly 202 includes a plurality of battery cells 2021, and the plurality of battery cells 2021 are stacked in sequence along the first direction X. The circuit connection device 100 is disposed between two adjacent battery cells 2021 ( Figure 7 The outermost battery cell 2021 is not shown in the figure, the first component 1 of the circuit connection device 100 is connected to one of the two adjacent battery cells 2021, and the second component 2 of the circuit connection device 100 is connected to the other of the two adjacent battery cells 2021. The circuit connection device 100 is electrically connected to the battery cell assembly 202 through the first section 11 and the second section 12. When the battery cell 2021 expands, the battery cell 2021 presses the circuit connection device 100, and the boss 21 presses the third section 13 and breaks the third section 13, thereby disconnecting the battery cell assembly 202.

[0065] In some embodiments, the first component 1 of the circuit connection device 100 is in direct contact with one of the two adjacent battery cells 2021 , and the second component 2 of the circuit connection device 100 is in direct contact with the other of the two adjacent battery cells 2021 .

[0066] like Figure 7 and Fig. 9As shown, in some embodiments, the circuit connection device 100 is disposed between the inner wall of the housing 201 and the battery cell assembly 202, and the circuit connection device 100 is electrically connected to the battery cell assembly 202 through the first section 11 and the second section 12; when the battery cell 2021 expands, the battery cell 2021 cooperates with the housing 201 to squeeze the circuit connection device 100, and the first component 1 and the second component 2 are close to each other, and the boss 21 on the second component 2 will break the third section 13 on the first component 1, so that the electrical connection between the first section 11 and the second section 12 is disconnected, reducing further battery damage and even causing safety accidents. In some embodiments, the first component 1 of the circuit connection device 100 is in direct contact with the inner wall of the housing 201 and one of the battery cell assembly 202, and the second component 2 of the circuit connection device 100 is in direct contact with the inner wall of the housing 201 and the other of the battery cell assembly 202.

[0067] In some embodiments, the battery cell 2021 includes a soft-pack battery cell, the battery cell 2021 includes a pole tab, and the first section 11 and the second section 12 are electrically connected to the pole tabs of the two battery cells 2021 respectively; or, one of the first section 11 and the second section 12 is electrically connected to the pole tab, and the other is electrically connected to the charging circuit of the battery cell 2021.

[0068] The present application also provides an electric device, which includes the battery module 200 as described above. The electric device has the circuit connection device 100 as described above, thereby having the function of reducing battery thermal runaway, reducing the risk of thermal runaway of the battery module 200, and improving the safety of the electric device.

[0069] The circuit connection device 100, battery module 200 and electrical equipment of the present application are provided with a first component 1 and a second component 2, and the first component 1 includes a third section 13 electrically connected to the first section 11 and the second section 12, and the second component 2 is provided with a boss 21, the first component 1 and the second component 2 can move close to each other, and drive the boss 21 and the third section 13 to squeeze each other, so that the third section 13 is broken, thereby disconnecting the electrical connection between the first section 11 and the second section 12; when the circuit connection device 100 is electrically connected to the battery cell 2021 of the battery module 200 through the first section 11 and the second section 12, and the circuit connection device 100 is arranged between the battery cells 2021 or between the battery cells 2021 and the shell wall of the battery module 200, the battery expansion can squeeze the circuit connection device 100, thereby breaking the third section 13 and disconnecting the charging circuit.

[0070] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, comprising a housing and a cell assembly, wherein the cell assembly is accommodated in the housing, a circuit connection device is electrically connected to the cell assembly, and the circuit connection device comprises: A first component, a third component and a second component are sequentially stacked along a first direction, wherein the first component is conductive, and characterized in that: The first component includes a first section, a second section and a third section, the first section and the second section are spaced apart, the third section is connected to the first section and the second section respectively, and the first section, the second section and the third section are electrically connected; The second member is provided with a boss extending toward the first member, and when viewed along the first direction, the boss and the third section at least partially overlap; Along the first direction, there is a gap between the boss and the third section, the first member and the second member can be close to each other, and the boss is configured to be pressed against the third section to break the third section; The first member further includes a first insulating portion, the third section is provided at the first insulating portion, the first section includes a first connecting portion provided at the first insulating portion and a first extending portion extending from the first insulating portion, and the second section includes a second connecting portion provided at the first insulating portion and a second extending portion extending from the first insulating portion; The first component further includes a second insulating portion, the first insulating portion and the second insulating portion are overlapped along the first direction and jointly clamp the first connecting portion, the second connecting portion and the third section; the first section, the second section, the first insulating portion and the second insulating portion are made by injection molding; At least one of the first insulating portion and the second insulating portion is provided with a first through hole along the first direction, and the third section is at least partially exposed to the first through hole; when viewed along the first direction, the boss is located in the first through hole; the first through hole is used for allowing the boss to pass through and contact the third section when the first member is subjected to a force acting toward the second member, and / or when the second member is subjected to a force acting toward the first member; The third component is made of insulating material, and along the first direction, the first component and the second component are respectively adhered to two sides of the third component; A first hole is provided on the third component; when viewed along the first direction, the boss is at least partially located in the first hole, and the first hole is used for allowing the boss to pass through and contact the third section when the first component is subjected to a force toward the second component, and / or when the second component is subjected to a force toward the first component.

2. The battery module according to claim 1, characterized in that: A spike portion is disposed on one end of the boss facing the first member.

3. The battery module according to claim 1, characterized in that: The third member has elasticity.

4. The battery module according to claim 1, characterized in that: An insulating material is disposed on a side of the third component close to the first component.

5. The battery module according to any one of claims 1 to 2, characterized in that: The battery cell assembly includes a plurality of battery cells, the plurality of battery cells are stacked in sequence along the first direction, and the circuit connection device is arranged between two adjacent battery cells.

6. The battery module according to any one of claims 1-2, characterized in that: The battery cell assembly includes a plurality of battery cells, and the plurality of battery cells are stacked in sequence along the first direction. Along the first direction, the circuit connection device is arranged between the inner wall of the shell and the battery cell assembly.

7. The battery module according to claim 1 or 2, characterized in that: The battery cells in the battery cell assembly are soft-pack battery cells.

8. An electrical device, characterized in that: Comprising a battery module as described in any one of claims 1-7.

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