Adapter, energy storage device and electric equipment

Abstract

The utility model discloses an adapter, an energy storage device and electric equipment, the adapter comprises a body, a first adapter body and a second adapter body, the first adapter body and the second adapter body are located on the two opposite sides of the body in the width direction, and the first adapter body and the second adapter body are arranged at intervals with the body; a first fusing part is connected between the first switching body and the body, a second fusing part is connected between the second switching body and the body, and the first fusing part and the second fusing part are oppositely arranged in the width direction of the body; in the length direction of the adapter, the first fusing part divides a gap between the first adapter body and the body into a first gap and a second gap, and the second fusing part divides a gap between the second adapter body and the body into a third gap and a fourth gap; in the length direction of the adapter, the first gap and the second gap are arranged in a staggered mode, and the third gap and the fourth gap are arranged in a staggered mode.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage device and electrical equipment. Background Technology

[0002] Rechargeable batteries, also known as secondary batteries or storage batteries, are batteries that can be recharged after discharge to reactivate their active materials and continue to be used. Their recyclable nature has made them a primary power source for electrical devices. As the demand for rechargeable batteries increases, higher requirements are being placed on their energy density and safety. Among these components, the adapter plate, which connects the battery cell and the terminals, is a key element. Ensuring both energy density and safety through the adapter plate is a pressing issue for the industry. Utility Model Content

[0003] This application provides an adapter, an energy storage device, and an electrical device. The adapter has sufficient overcurrent capacity and can ensure the safety performance of the battery cell.

[0004] This embodiment provides an adapter, which includes a body, a first adapter body, and a second adapter body. The first adapter body and the second adapter body are located on opposite sides of the body in the width direction and are spaced apart from the body.

[0005] A first fuse is connected between the first adapter and the main body, and two fuses are connected between the second adapter and the main body. The first fuse and the second fuse are arranged opposite to each other in the width direction of the main body.

[0006] Along the length of the adapter, the first fusible part divides the gap between the first adapter and the main body into a first gap and a second gap, and the second fusible part divides the gap between the second adapter and the main body into a third gap and a fourth gap.

[0007] Along the length of the adapter, the first gap and the second gap are offset, and the third gap and the fourth gap are offset.

[0008] In this embodiment, the first gap and the second gap are located on opposite sides of the first fusion segment and are offset. That is, in the width direction of the connector, the width of the overlapping portion between the first gap and the second gap is the width of the first fusion segment. Compared to the width of the first fusion segment when the first gap and the second gap completely overlap, and in the case of no first gap or second gap, the width of the first fusion segment in this embodiment is smaller, meaning the flow area is smaller. Reducing the flow area of ​​the first fusion segment while ensuring connection strength and processing technology allows the first fusion segment to fuse more quickly, improving the fusing rate of the first adapter and enhancing safety performance. Similarly, the third gap and the fourth gap are located on opposite sides of the second fusion segment and are offset. The width of the second fusion segment in this embodiment is smaller, allowing for faster fusing while ensuring connection strength, improving the fusing rate of the second adapter and enhancing safety performance.

[0009] Moreover, the staggered arrangement of the first and second gaps, as well as the staggered arrangement of the third and fourth gaps, is equivalent to increasing the area of ​​the first and second adapters, giving them sufficient area to improve current flow and thus enhancing the current flow capacity of the adapter.

[0010] In one embodiment, the first gap and the second gap are partially offset along the length of the adapter, and the third gap and the fourth gap are partially offset.

[0011] In one embodiment, the body is provided with a welding part, which is located between the first gap and the third gap, and the thickness of the welding part is greater than the thickness of other parts of the body.

[0012] In one embodiment, the body further includes a clearance opening that extends through the surface of the body in the thickness direction and to one end away from the welded portion, and the clearance opening is located between the second gap and the fourth gap.

[0013] In one embodiment, the body includes a first segment and a second segment, the first segment and the second segment are connected along the length direction of the body, the width of the first segment is greater than the width of the second segment, a first gap is formed between the first segment and the first adapter, and a third gap is formed between the first segment and the second adapter.

[0014] In one embodiment, the first adapter includes a first part and a second part connected to the first part, the second part extending toward one side of the first segment of the body having a first extension, and the first fusible part being connected to the first extension and the first segment.

[0015] The second adapter includes a third part and a fourth part connected to the third part. The fourth part extends a second extension toward the first segment of the main body. The second fusible part is connected to the second extension and the first segment. A second gap is formed between the second segment and the second part, and a fourth gap is formed between the second segment and the fourth part.

[0016] This application provides an adapter, which includes a body, a first adapter body and a second adapter body, wherein the first adapter body and the second adapter body are located on opposite sides of the body in the width direction and are spaced apart from the body.

[0017] The first adapter includes a first portion and a second portion connected to the first portion, the second portion extending towards one side of the main body with a first extension portion. The second adapter also includes a third portion and a fourth portion connected to the third portion, the fourth portion extending towards one side of the main body with a second extension portion.

[0018] A first fusible link is connected between the first extension and the body, and a first gap is formed between the first extension and the body; a second fusible link is connected between the second extension and the body, and a third gap is formed between the body and the third extension.

[0019] The second part and the fourth part are spaced apart and opposite each other in the width direction of the adapter. The second part, the fourth part, the first welded part and the second welded part together with one end of the body form a clearance opening. In the length direction of the adapter, the clearance opening is opposite to part of the first gap and part of the third gap, and the orthographic projections of the first fused part and the second fused part in the length direction of the adapter are completely located within the clearance opening.

[0020] In one embodiment, the body is provided with a welding part, which is located between the first gap and the third gap, and the thickness of the welding part is greater than the thickness of other parts of the body.

[0021] In one embodiment, the body includes a first end and a second end, the first end and the second end are disposed opposite to each other along the length direction of the body, and the outline of the second end is an arc shape protruding towards the first end;

[0022] The end of the first fused portion facing away from the first gap is connected to the side of the second portion and the second end, and the end of the second fused portion facing away from the third gap is connected to the side of the fourth portion and the second end.

[0023] This application provides an energy storage device, which includes an end cap assembly, an electrode assembly, and the aforementioned adapter. The end cap assembly includes a pole post, and the battery cell assembly includes two tabs. The adapter is connected to the side of the end cap assembly facing the battery cell assembly. The pole post is welded to the body and is electrically connected. The first adapter and the second adapter are respectively connected to the tabs and are electrically connected.

[0024] This application provides an electrical device, wherein the energy storage device is used to store electrical energy. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the energy storage device provided in the embodiments of this application;

[0027] Figure 2 for Figure 1 A partially exploded structural diagram of the energy storage device shown.

[0028] Figure 3 for Figure 1 The diagram shows a structural schematic of the end cap assembly of the energy storage device, which illustrates a first-implemented adapter.

[0029] Figure 4 for Figure 3 The diagram shows the structure of the adapter.

[0030] Figure 5 for Figure 4 A schematic diagram of the adapter from another angle is shown;

[0031] Figure 6 for Figure 4 A plan view of the adapter shown;

[0032] Figure 7 for Figure 1 A simulation diagram of the heat distribution of the adapter in the first embodiment when the energy storage device is short-circuited;

[0033] Figure 8 for Figure 1 A schematic plan view of another embodiment of the adapter for the energy storage device shown;

[0034] Figure 9 for Figure 1The diagram shows a simulation of the heat distribution of the adapter in the second embodiment when the energy storage device experiences a short circuit.

[0035] The terms corresponding to the numbers in the attached figures are as follows: Energy storage device 1000, end cap assembly 100, housing 400, adapter 10, first pole post 50, second pole post 60, pole core 210, first pole tab 220, second pole tab 230, first adapter 10a, body 11, first adapter body 12, second adapter body 13, first fuse part 14, second fuse part 15, first gap 16, second gap 17, third gap 18, fourth gap 19, front 111, back 112, first end 113, second end 114, first side 115, second side 116, first section 11a, second section 11b, welding part 117, clearance opening 118, first connecting side 121, second connecting side 131, first part 123, second part 124, third part 133, fourth part 134, first extension A, second extension B. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] This application provides a residential energy storage system, which includes a power conversion device (photovoltaic panel), a wind power conversion device (windmill), a first user load (base station), a second user load (not shown) (commercial / industrial side), and an energy storage device. The system also includes an energy storage cabinet in which the energy storage device is installed for easy outdoor installation. Specifically, the power conversion device can convert solar energy into electricity during periods of low electricity prices. The energy storage device stores this electricity and supplies it to the base station and commercial / industrial side during peak electricity prices, or provides power during power outages. The wind power conversion device (windmill) can convert wind energy into electricity. The energy storage device stores this electricity and supplies it to the base station and commercial / industrial side during peak electricity prices, or provides power during power outages. The electricity can be transmitted via high-voltage cables. The energy storage device provided in this application is based on a residential energy storage scenario in user-side energy storage, but is not limited to residential energy storage scenarios.

[0038] It is understood that energy storage devices may include, but are not limited to, single cells, battery modules, battery packs, and battery systems. The actual application form of the energy storage devices provided in this application embodiment may be, but is not limited to, the listed products, and may also be other application forms. This application embodiment does not strictly limit the application form of the energy storage devices. There may be multiple energy storage devices, which may be connected in series or parallel. Multiple energy storage devices are supported and electrically connected by an isolation plate (not shown). In this embodiment, "multiple" refers to two or more.

[0039] This application uses the energy storage device 1000 as an example of a multi-cell battery for illustration.

[0040] Please see Figure 1 and Figure 2 , Figure 1 This is a three-dimensional structural diagram of the energy storage device provided in the embodiments of this application; Figure 2 for Figure 1 The diagram shows a partial exploded view of the energy storage device. For ease of description, definitions are used. Figure 1 The length direction of the end cap assembly 100 shown is the Y-axis direction, the width direction is the X-axis direction, and the thickness direction is the Z-axis direction. The X-axis, Y-axis, and Z-axis directions are mutually perpendicular. The directional terms such as "upper" and "lower" mentioned in the description of the embodiments in this application are based on the appendix to the specification. Figure 2 The orientation described herein, with "up" referring to the positive Z-axis direction and "down" referring to the negative Z-axis direction, does not constitute a limitation on the energy storage device 1000 in actual application scenarios. The terms "same," "equal," or "parallel" used below are all subject to tolerance.

[0041] The energy storage device 1000 includes a housing 400, an end cap assembly 100, an electrode assembly, and two adapters 10. The end cap assembly 100 is mounted on one end of the electrode assembly. The housing 400 has an opening and a receiving cavity; the electrode assembly is received in the receiving cavity, and the end cap assembly 100 is sealed to the opening. One adapter connects the electrode assembly and the first electrode post 50 of the end cap assembly 100, and the other adapter connects the electrode assembly and the second electrode post 60 of the end cap assembly 100.

[0042] In this embodiment, the electrode assembly includes two electrode cores 210. The two electrode cores 210 are arranged side-by-side along the width direction (X-axis direction) of the energy storage device 1000. Each electrode core 210 includes two tabs. Specifically, each electrode core 210 includes a first tab 220 and a second tab 230. Along the width direction (X-axis direction) of the energy storage device 1000, the first tabs of the two electrode cores are positioned opposite each other, and the second tabs of the two electrode cores are positioned opposite each other.

[0043] like Figure 3 As shown, Figure 3 for Figure 1 The diagram shows a structural schematic of the end cap assembly of the energy storage device, illustrating an adapter component of the first embodiment. Two adapter components 10 are designated as a first adapter component 10a and a second adapter component (not shown). The first adapter component 10a and the second adapter component are located on the side of the end cap assembly 100 facing the housing 400. The first adapter component 10a and the second adapter component are welded and connected to the first pole post 50 and the second pole post 60, respectively. The first tabs 220 of the two pole cores 210 are connected to the first pole post 50 via the first adapter component 10a, and the second tabs 230 of the two pole cores are connected to the second pole post 60 via the second adapter component.

[0044] In this embodiment, the electrode assembly is also covered with an insulating film (not shown) to protect the electrode core 210 and prevent it from being scratched. The insulating film covers the outer surface of the electrode assembly, and the sides of the insulating film are thermally bonded to the end cap assembly 100.

[0045] Please refer to the following: Figure 4 and Figure 5 , Figure 4 for Figure 3 The diagram shows the structure of the adapter. Figure 5 for Figure 4 The diagram shows the structural design of the adapter from another angle. In this embodiment, the two adapters have identical structures; however, only one adapter will be used as an example for explanation.

[0046] The first adapter 10a is a conductive sheet, which can be integrally stamped and cut from a conductive metal material. The first adapter 10a includes a body 11, a first adapter body 12, and a second adapter body 13. The first adapter body 12 and the second adapter body 13 are connected to opposite sides in the width direction of the body 11. A first fusible portion 14 connects the first adapter body 12 to the body 11, and a second fusible portion 15 connects the second adapter body 13 to the body 11. Both the first adapter body 12 and the second adapter body 13 have gaps with the body 11. The first fusible portion 14 divides one gap into a first gap 16 and a second gap 17; the second fusible portion 15 divides the other gap into a third gap 18 and a fourth gap 19.

[0047] The main body 11 is generally rectangular and includes a front side 111, a back side 112, a first end 113, a second end 114, a first side 115, and a second side 116. The front side 111 and the back side 112 are arranged opposite to each other along the thickness direction of the main body 11. The first end 113 and the second end 114 are arranged opposite to each other along the length direction of the main body 11, that is, located at both ends of the length direction of the main body 11. The first side 115 and the second side 116 are arranged opposite to each other along the width direction of the main body 11. The front side 111 and the back side 112 connect the first end 113, the second end 114, the first side 115, and the second side 116, and the first end 113 and the second end 114 connect the first side 115 and the second side 116, respectively.

[0048] The body 11 includes a first segment 11a and a second segment 11b, which are connected along the length of the body 11. The width of the first segment 11a is greater than the width of the second segment 11b. The first end 113 is located in the first segment 11a, and the second end 114 is located in the second segment 11b.

[0049] The body 11 also includes a welding portion 117, which is used for welding with the first pole post. In this embodiment, the welding portion 117 is located in the first segment 11a, and the welding portion 117 is formed directly during the molding of the body 11; the thickness of the welding portion 117 is less than the thickness of other parts of the body 11, which facilitates welding with the pole post and ensures welding stability.

[0050] The first adapter 10a also includes a clearance opening 118, which is recessed from the second end 114 of the second segment 11b of the body 11 towards the first end 113 and extends through the front side 111 and the back side 112. The clearance opening 118 has a generally arc-shaped outline and an arc-shaped inner wall facing the second end 114. After the first adapter 10a is connected to the first electrode tab and the first electrode post, it will be encapsulated by the end cap assembly. The clearance opening 118 is used to avoid the liquid injection hole of the end cap assembly to prevent interference.

[0051] The first adapter 12 includes a first connecting side 121, which is spaced apart from the first side 115. A first fused portion 14 connects the first connecting side 121 and the first side 115 of the body 11. The first adapter 12 extends away from the body 11, and a first gap 16 and a second gap 17 are formed between the first connecting side 121 and the first side 115. In the length direction of the first adapter 12, the first gap 16 and the second gap 17 are located on opposite sides of the length direction of the first fused portion 14, that is, separated by the first fused portion. It can be understood that during the punching and forming of the first adapter 10a, the first gap 16 and the second gap 17 are formed between the first adapter 12 and the body 11, thereby forming the first fused portion 14.

[0052] The second adapter 13 includes a second connecting side 131, which is spaced apart from a second side 116. A second fusion portion 15 connects the second connecting side 131 and the second side 116 of the body 11. The second adapter 13 extends away from the body 11, and a third gap 18 and a fourth gap 19 are formed between the second connecting side 131 and the second side 116. Along the length of the second adapter 13, the third gap 18 and the fourth gap 19 are located on opposite sides of the length of the first fusion portion 14. It can be understood that during the punching and forming of the first adapter 10a, the third gap 18 and the fourth gap 19 are formed between the second adapter 13 and the body 11, thereby forming the second fusion portion 15.

[0053] Please see Figure 6 , Figure 6 for Figure 4 The diagram shows a plan view of the adapter. Specifically, the first adapter 12 includes a first part 123 and a second part 124, which are connected along the length of the first adapter 12. The width of the first part 123 is smaller than the width of the second part 124. The second adapter 13 includes a third part 133 and a fourth part 134, which are connected along the length of the second adapter 13. The width of the third part 133 is smaller than the width of the fourth part 134. In effect, the second part 124 protrudes from the first part 123 on the side connected to the first fusible part 14; this part can be called the first extension A. The fourth part 134 protrudes from the third part 133 on the side connected to the second fusible part 15; this part can be called the second extension B. This is equivalent to the first fusible part connecting to the first extension A, and the second fusible part connecting to the second extension B.

[0054] The first fusible link 14 is located on the first side 115 of the body 11, connecting the first extension A of the first adapter 12 and the portion of the first segment 11a of the body 11 near the second segment 11b, so that the first portion 123 of the first adapter 12 and the first segment 11a of the body 11 are spaced apart and form a first gap 16, and a second gap 17 is formed between the second segment 11b and the second portion 124. The second fusible link 15 is located on the second side 116 of the body 11, connecting the second extension B of the second adapter 13 and the portion of the first segment 11a of the body 11 near the second segment 11b, so that the third portion 133 of the second adapter 13 and the body 11 are spaced apart and form a third gap 18, and a fourth gap 19 is formed between the fourth portion 134 of the second adapter 13 and the second segment 11b.

[0055] In this embodiment, the first gap 16 and the third gap 18 are located on opposite sides of the welding part 117. The first melting part 14 and the second melting part 15 are closer to the clearance opening 118 than the welding part 117. In the width direction, the first melting part 14 and the second melting part 15 are completely offset from the welding part 117. When the first melting part 14 and the second melting part 15 heat up and melt, the heating rate of the welding part 117 and the electrode can be reduced, so as to avoid the electrode temperature rising too high and thus avoid problems such as cell leakage after the plastic or sealing ring of the end cap assembly is damaged.

[0056] In this embodiment, the first adapter 10a has a symmetrical structure. The first adapter body 12 and the second adapter body 13 are symmetrical along the centerline of the length direction of the first adapter 10a, and the first fuse part 14 and the second fuse part 15 are symmetrical along the centerline of the length direction of the first adapter 10a. The first adapter body 12 and the second adapter body 13 are connected to the main body 11 through the first fuse part 14 and the second fuse part 15, respectively. This is equivalent to a reduction in the size of the part where the first adapter body 12 and the second adapter body 13 are connected to the main body 11. That is, the first fuse part 14 and the second fuse part 15 are smaller than the overcurrent area of ​​the adjacent area. During the battery short circuit test, the first fuse part 14 and the second fuse part 15 can quickly melt and break. In other words, when the battery generates excessively high temperature, the first fuse part 14 and the second fuse part 15 can quickly melt and break, disconnecting the cell and the terminal, which can ensure the safety of the cell and prevent the battery from experiencing greater failure.

[0057] In this embodiment, the first gap 16 and the second gap 17 are offset along the length of the first adapter 10a. That is, the orthographic projections of the first gap 16 and the second gap 17 in the length direction overlap. This can be understood as the first gap 16 and the second gap 17 being partially offset. In other embodiments, the first gap 16 and the second gap 17 are completely offset along the length of the first adapter 10a. In the length direction of the second adapter, the third gap 18 and the fourth gap 19 are offset. That is, the orthographic projections of the third gap 18 and the fourth gap 19 overlap along the length direction. The first gap 16 and the second gap 17 are located on opposite sides of the first fused portion 14 and are offset, meaning that the width of the overlapping portion between the first gap 16 and the second gap 17 in the width direction of the first connector is the width of the first fused portion 14. Compared to the width of the first fusing portion 14 when the first gap 16 and the second gap 17 are completely overlapped, and the width of the first fusing portion 14 in this embodiment is smaller, meaning the flow area is smaller. This reduces the flow area of ​​the first fusing portion 14 while maintaining connection strength and processing capabilities, allowing it to fuse more quickly, thus increasing the fusing rate of the first adapter and improving safety performance. Similarly, the third gap 18 and the fourth gap 19 are located on opposite sides of the second fusing portion 15 and are offset. That is, in the width direction of the second connector, the width of the overlapping portion between the third gap 18 and the fourth gap 19 is the width of the second fusing portion 15. Compared to the width of the first fusing portion 14 when the third gap 18 and the fourth gap 19 are completely overlapped, and the width of the second fusing portion 15 in this embodiment is smaller, allowing for faster fusing while maintaining connection strength, thus increasing the fusing rate of the second adapter and improving safety performance.

[0058] By staggering the first gap 16 and the second gap 17, as well as the third gap 18 and the fourth gap 19, the first adapter 12 and the second adapter 13 have sufficient area to improve current flow. This ensures the current flow capacity of the second portion 124 of the first adapter 12 and the fourth portion 134 of the second adapter 13, thus guaranteeing the current flow performance of the first adapter 10a. It can be understood that the increased area of ​​the second portion 124 and the fourth portion 134 compensates for the impact of the first fuse portion 14 and the second fuse portion 15 on current flow.

[0059] In this embodiment, the width of the first segment 11a of the body 11 is greater than the width of the second segment 11b. That is, the width of the body 11 between the first gap 16 and the third gap 18 is greater than the width of the body 11 between the second gap 17 and the fourth gap 19. The current of the first adapter 12 and the adapter flows to the electrode and is distributed around the electrode. Due to the increased area of ​​the first segment 11a, the heat generation is small and the heat dissipation is good, and the current carrying area is increased; therefore, the area of ​​the welding part 117 is larger, which can increase the heat dissipation area at the electrode and reduce the electrode temperature; it also meets the area requirements for high current carrying capacity.

[0060] Please see Figure 7 , Figure 7 for Figure 1 The diagram shows a simulation of the heat distribution of the adapter in the first embodiment when a short circuit occurs in the energy storage device. It can be seen that when a short circuit occurs in the battery, the temperature of the first adapter body 12 and the second adapter body 13 of the first adapter 10a rises. Due to the small overcurrent area of ​​the first fuse part 14 and the second fuse part 15, the temperature of the first fuse part 14 and the second fuse part 15 rises rapidly and reaches its maximum. Meanwhile, the temperature of the body 11 of other parts except for the location of the welding part 117 remains in a normal state compared to other locations. In this way, the first fuse part 14 and the second fuse part 15 can melt quickly, timely isolate the terminal post and the high-temperature tab, and quickly disconnect the tab and the terminal post to ensure the safety performance of the battery.

[0061] The structure of the second adapter is the same as that of the first adapter 10a. For details, please refer to the description of the first adapter 10a above. It will not be repeated here.

[0062] Please see Figure 8 , Figure 8 for Figure 1 A schematic diagram of the planar structure of another embodiment of the adapter of the energy storage device shown.

[0063] In this embodiment, the first adapter 10a is still used as an example for description. Compared with the first embodiment, the second gap 17 and the fourth gap 19 are omitted in this embodiment. The same structure and effects as in the first embodiment will not be described again here.

[0064] The first adapter 10a in this embodiment includes a body 11, a first adapter 12, and a second adapter 13. The first adapter 12 and the second adapter 13 are connected to opposite sides of the body 11 in the width direction. A first fusible link 14 connects the first adapter 12 to the body 11, and a second fusible link 15 connects the second adapter 13 to the body 11. A first gap 16 exists between the first adapter 12 and the body 11, and a third gap 18 exists between the second adapter 13 and the body 11. Unlike the previous embodiment, the second segment of the body 11 is omitted, and the first segment 11a, the first adapter 12, and the second adapter 13 directly form a clearance opening 118.

[0065] Please refer to Figure 4 The first adapter 12 includes a first part 123 and a second part 124, which are connected along the length of the first adapter 12. The width of the first part 123 is smaller than the width of the second part 124. The second part 124 includes a first connecting side 121. The second adapter 13 includes a third part 133 and a fourth part 134, which are connected along the length of the second adapter 13. The width of the third part 133 is smaller than the width of the fourth part 134. The fourth part 134 includes a second connecting side 131. In fact, the second part 124 protrudes from the side connected to the first fuse 14; this part can be called the first extension A. The fourth part 134 protrudes from the side connected to the second fuse 15; this part can be called the second extension B.

[0066] The first fusion portion 14 connects the first segment 11a of the body 11 to the first extension A of the first adapter 12, thereby creating a first gap 16 between the first portion 123 of the first adapter 12 and the body 11. The second fusion portion 15 connects the first segment 11a of the body 11 to the second extension B of the fourth portion 134 of the second adapter 13, thereby creating a third gap 18 between the third portion 133 of the second adapter 13 and the body 11. The first gap 16 and the third gap 18 are located on opposite sides of the welded portion 117, as in the first embodiment, and will not be described again here. The first fusion portion 14 is located at one end of the first segment 11a of the body 11, and the second fusion portion 15 is located at one end of the first segment 11a of the body 11. Both the second fusion portion 15 and the first fusion portion 14 are adjacent to the clearance opening 118.

[0067] In this embodiment, the second end 114 is an arc-shaped end face that protrudes towards the first end 113. The end of the first fusible link 14 facing away from the first gap 16 is connected to the second end 114 and to the first connecting side 121; the end of the second fusible link 15 facing away from the second gap 17 is connected to the second end 114 and to the second connecting side 131. That is, a portion of the first connecting side 121 of the first adapter 12 and a portion of the second connecting side 131 of the second adapter 13 are both connected to the second end 114, forming a clearance opening 118. Along the length of the first adapter 10a, the orthographic projection of the first gap 16 coincides with the orthographic projection of the clearance opening 118 and the first fusible link 14. The orthographic projection of the second gap 17 coincides with the orthographic projection of the clearance opening 118 and the second fusible link 15. It is understood that the first gap 16 and the second gap 17 are misaligned with the clearance opening 118. The orthogonal projections of the first fuse portion 14 and the second fuse portion 15 are completely located within the clearance opening.

[0068] In this embodiment, the first adapter 10a is a stamped part. After being punched to form the first gap 16, the third gap 18, and the clearance opening 118, the first fuse portion 14 and the second fuse portion 15 are then formed. In this embodiment, the width of the clearance opening 118 is greater than five times the thickness of the body 11, which can save materials, reduce costs, and improve material utilization during the processing.

[0069] In this embodiment, since the flow area of ​​the first fuse portion 14 and the second fuse portion 15 is small, and in order to ensure the strength of the first fuse portion 14 and the second fuse portion 15 during the processing, the width of the first fuse portion 14 and the second fuse portion 15 is about 2.5 times the thickness of the material of the first adapter 10a, which will cause a large flow bottleneck problem. Therefore, the first gap 16 and the second gap 17 are staggered with the clearance opening 118 to reduce the width of the first fuse portion 14 and the second fuse portion 15. This width is used to form the first extension A of the second part 124 of the first adapter body 12 and the fourth part 134 and the second extension B of the second adapter body 13. The first adapter body 12 and the second adapter body 13 have sufficient area to improve the flow. In other words, it ensures the current-carrying capacity of the second part 124 of the first adapter 12 and the fourth part 134 of the second adapter 13, thus guaranteeing the performance of the first adapter 10a. Simultaneously, it reduces the width of the first fuse portion 14 and the second fuse portion 15, thereby lowering the current-carrying area. It can be understood that the increased area of ​​the second part 124 and the fourth part 134 can compensate for the impact of the first fuse portion 14 and the second fuse portion 15 on the current flow.

[0070] In this embodiment, the second end 114 of the clearance opening 118 is an arc-shaped structure. Current flows towards the pole through the first adapter 12 and the second adapter 13. With the presence of the clearance opening 118, the current will pass through the part of the body 11 between the first fuse part 14 and the second fuse part 15. Heat accumulates on the part of the body 11 between the first fuse part 14 and the second fuse part 15, so that the first fuse part 14 and the second fuse part 15 of the first adapter 10a can melt under high current conditions.

[0071] Furthermore, the presence of the clearance opening 118 reduces the area adjacent to the first fuse portion 14 and the second fuse portion 15, thus improving heat dissipation and enhancing the heat collection efficiency of the first fuse portion 14 and the second fuse portion 15 for faster melting. The clearance opening 118 is designed as an arc-shaped surface, which, compared to a straight edge, ensures sufficient area for both the first fuse portion 14 and the second fuse portion 15, while also providing ample area for the clearance opening 118.

[0072] See Figure 9 , Figure 9 for Figure 1 The diagram shows a simulation of the heat distribution of the adapter in the second embodiment when a short circuit occurs in the energy storage device. It can be seen that when a short circuit occurs in the battery, the temperature is concentrated in the first fuse part 14 and the second fuse part 15. Furthermore, between the welded part 117 and the arc-shaped end face, the first fuse part 14 and the second fuse part 15 can be quickly melted, isolating the terminal post from the high-temperature tab, ensuring battery safety performance, and improving reliability.

[0073] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An adapter, characterized in that, The adapter includes a body, a first adapter body, and a second adapter body. The first adapter body and the second adapter body are located on opposite sides of the body in the width direction and are spaced apart from the body. A first fuse is connected between the first adapter and the main body, and a second fuse is connected between the second adapter and the main body. The first fuse and the second fuse are arranged opposite to each other in the width direction of the main body. Along the length of the adapter, the first fusible part divides the gap between the first adapter and the main body into a first gap and a second gap, and the second fusible part divides the gap between the second adapter and the main body into a third gap and a fourth gap. Along the length of the adapter, the first gap and the second gap are offset, and the third gap and the fourth gap are offset.

2. The adapter according to claim 1, characterized in that, Along the length of the adapter, the first gap and the second gap are partially offset, and the third gap and the fourth gap are partially offset.

3. The adapter according to claim 1, characterized in that, The body is provided with a welding part, which is located between the first gap and the third gap, and the thickness of the welding part is less than the thickness of other parts of the body.

4. The adapter according to claim 3, characterized in that, The body also has a clearance opening that extends through the surface of the body in the thickness direction and to one end away from the welded part. The clearance opening is located between the second gap and the fourth gap.

5. The adapter according to any one of claims 1-4, characterized in that, The body includes a first segment and a second segment, which are connected along the length of the body. The width of the first segment is greater than the width of the second segment. A first gap is formed between the first segment and the first adapter, and a third gap is formed between the first segment and the second adapter.

6. The adapter according to claim 5, characterized in that, The first adapter includes a first part and a second part connected to the first part. The second part extends a first extension portion toward the first segment of the main body. The first fusible part is connected to the first extension portion and the first segment. The second adapter includes a third part and a fourth part connected to the third part. The fourth part extends a second extension toward the first segment of the main body. The second fusible part is connected to the second extension and the first segment. The second gap is formed between the second segment and the second part, and the fourth gap is formed between the second segment and the fourth part.

7. An adapter, characterized in that, The adapter includes a body, a first adapter body, and a second adapter body. The first adapter body and the second adapter body are located on opposite sides of the body in the width direction and are spaced apart from the body. The first adapter includes a first portion and a second portion connected to the first portion, the second portion extending towards one side of the main body with a first extension portion. The second adapter also includes a third portion and a fourth portion connected to the third portion, the fourth portion extending towards one side of the main body with a second extension portion. A first fusible link is connected between the first extension and the body, and a first gap is formed between the first extension and the body; a second fusible link is connected between the second extension and the body, and a third gap is formed between the body and the third extension. The second part and the fourth part are spaced apart and opposite each other in the width direction of the adapter. The second part, the fourth part, the first extension and the second extension together with one end of the body form a clearance opening. In the length direction of the adapter, the clearance opening is opposite to part of the first gap and part of the third gap, and the orthographic projections of the first fused part and the second fused part in the length direction of the adapter are completely located within the clearance opening.

8. The adapter according to claim 7, characterized in that, The body is provided with a welding part, which is located between the first gap and the third gap, and the thickness of the welding part is less than the thickness of other parts of the body.

9. The adapter according to claim 7, characterized in that, The body includes a first end and a second end, the first end and the second end are arranged opposite to each other along the length direction of the body, and the outline of the second end is an arc shape that protrudes towards the first end; The end of the first fused portion facing away from the first gap is connected to the side of the second portion and the second end, and the end of the second fused portion facing away from the third gap is connected to the side of the fourth portion and the second end.

10. An energy storage device, characterized in that, The device includes an end cap assembly, an electrode assembly, and an adapter as described in any one of claims 1-9. The end cap assembly includes a pole post, the electrode assembly includes two tabs, the adapter is connected to the side of the end cap assembly facing the electrode assembly, the pole post is welded to the body and is electrically connected, and the first adapter and the second adapter are respectively connected to the tabs and are electrically connected.

11. An electrical appliance, characterized in that, Includes the energy storage device of claim 10, wherein the energy storage device is used to store electrical energy.

Images