Battery, battery pack and electric device
By adding protrusions and flanges to the casing wall, the welding defects caused by misaligned tabs were resolved, improving the battery's overcurrent capacity and safety, and reducing the risk of thermal runaway.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CALB GROUP CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-12
Smart Images
Figure CN224355306U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and more particularly to a battery, battery pack, and electrical device. Background Technology
[0002] In traditional battery designs, the tabs are typically connected directly to the lower surface of the lead plate to ensure good electrical connection and mechanical strength. However, to further improve battery energy density and reduce size, a design where the tabs wrap around to the upper surface of the lead plate and connect to it has become increasingly common. This design effectively reduces battery thickness, making it more suitable for portable electronic devices and other applications with strict space requirements.
[0003] However, batteries are usually made of multiple positive and negative electrode plates stacked or wound alternately, which also results in multi-layered tabs. When the tabs are wound to the upper surface of the lead plate, the multi-layered tabs are prone to mis-layering, which makes it easy for some tab ends to be inserted into the gap between the adapter plate and the terminal post, affecting the welding effect between the adapter plate and the terminal post, thus causing a current difference between the adapter plate and the terminal post. Utility Model Content
[0004] This application provides a battery, battery pack, and electrical device to address the problem that the end of the tab can easily be inserted into the gap between the adapter and the terminal, affecting the welding effect between the adapter and the terminal.
[0005] On one hand, this application provides a battery, comprising:
[0006] A housing having a first wall;
[0007] A battery cell, the battery cell being located within the housing, the battery cell including a tab portion, the thickness of the tab portion being m;
[0008] An adapter is located on the side of the first wall adjacent to the battery cell;
[0009] A pole post, which penetrates the first wall and is welded to the adapter;
[0010] The first wall has a first protrusion that protrudes away from the adapter to form a first receiving cavity on the side of the first wall adjacent to the adapter. The electrode lug extends into the first receiving cavity and is welded to the adapter. A first flange is also provided on the side of the first wall away from the adapter. The first flange wraps around the periphery of the electrode post, and its end is bent to form a riveting portion for riveting to the electrode post. The minimum distance between the edge of the first protrusion and the edge of the first flange is d, where d × m is 0.4 mm. 2 -2.2mm 2 .
[0011] In some possible implementations, the welding area between the electrode tab and the adapter is at least partially located within the first receiving cavity.
[0012] In some possible implementations, the first protrusion has an inclined first surface on the side adjacent to the first flange, and the minimum distance between the first surface and the first flange gradually increases from the adapter to the first wall.
[0013] In some possible implementations, the first protrusion is partially surrounded on the side adjacent to the pole post on the outside of the first flange, and the portion of the first protrusion surrounding the outside of the first flange matches the shape of the first flange.
[0014] In some possible implementations, along the direction from the adapter to the first wall, the first protrusion faces away from the surface of the adapter, and the maximum distance between the first wall and the surface of the adapter facing away from the first wall is 0.5mm-1.5mm.
[0015] In some possible implementations, along the direction from the adapter to the first wall, the riveting portion is away from the surface of the adapter, and the distance between the riveting portion and the first wall away from the surface of the adapter is 1.5mm-3.5mm.
[0016] In some possible implementations, a first insulating member is also included, located between the adapter and the first wall. The first insulating member has a second protrusion located within the first receiving cavity. The second protrusion and the first protrusion protrude in the same direction to form a second receiving cavity by isolating a portion of the first receiving cavity on the side adjacent to the first insulating member and the adapter. The tab portion extends into the second receiving cavity.
[0017] In some possible implementations, d is 1mm-12mm.
[0018] In some possible implementations, m is 0.15mm-1.6mm.
[0019] In some possible implementations, the first wall has a mounting portion, the mounting portion is provided with a first connecting hole, one end of the pole passes through the first connecting hole and is welded to the adapter, the other end of the pole extends to the outside of the first connecting hole, and the first flange is wrapped around the periphery of the mounting portion.
[0020] A limiting platform is provided on the pole post. The limiting platform is located at the end of the first connecting hole away from the adapter. The riveting part is located on the side of the limiting platform away from the adapter, so as to press the limiting platform tightly onto the mounting part.
[0021] In some possible implementations, the electrode post includes a positive electrode post and a negative electrode post, which are respectively disposed at both ends of the first protrusion;
[0022] The adapter includes a positive electrode adapter piece and a negative electrode adapter piece, which are connected to the positive electrode post and the negative electrode post respectively.
[0023] Secondly, this application provides a battery pack including the battery described in any of the first aspects.
[0024] Thirdly, this application provides an electrical device, including an electrical appliance and a battery as described in any of the first aspects or a battery pack as described in the second aspect, wherein the battery or the battery pack is used to supply power to the electrical appliance.
[0025] In the battery, battery pack, and electrical device provided in this application, the battery comprises a casing, a cell, an adapter, and terminals. The adapter is located inside a first wall, and the terminals penetrate the first wall and are welded to the adapter. The first wall has a first protrusion that protrudes away from the adapter, forming a first receiving cavity on the side of the first wall adjacent to the adapter. The tab portion of the cell extends into the first receiving cavity and is welded to the adapter, allowing the terminals and tabs to be electrically connected via the adapter. A first flange is wrapped around the periphery of the terminals and forms a riveting part at its end for riveting with the terminals. This allows the adapter and tabs to be connected first, followed by riveting the riveting part to the terminals, improving assembly convenience. Furthermore, the relationship between the thickness m of the tab and the minimum distance d between the edge of the first protrusion and the edge of the first flange satisfies d × m = 0.4 mm. 2 -2.2mm 2 On the one hand, it can prevent the tabs from being too thick or too thin, so that while maintaining good current flow capacity, the tabs can be better accommodated in the receiving cavity, preventing the tabs from being subjected to strong compression and avoiding multi-layer tab misalignment. This increases the distance between the end of the tab and the edge of the pole, reducing the probability of the tab being inserted into the gap between the pole and the adapter, which helps to improve the welding quality between the pole and the adapter, ensure current flow capacity, and reduce the probability of thermal runaway. On the other hand, it can ensure that the d value is appropriate, leaving suitable riveting processing space for the first flange, so that the first flange can be effectively riveted to the pole, reducing the probability of riveting failure between the first wall and the pole. Attached Figure Description
[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0027] Figure 1 A perspective view of the battery provided in an embodiment of this application;
[0028] Figure 2 A top view of a battery provided in an embodiment of this application;
[0029] Figure 3 for Figure 2 AA section view in the middle;
[0030] Figure 4 This is a schematic diagram of the structure of the first wall in the battery provided in an embodiment of this application;
[0031] Figure 5 This is a schematic diagram of the structure of the adapter in the battery provided in the embodiment of this application.
[0032] Explanation of reference numerals in the attached figures:
[0033] 100-Housing, 110-First wall, 111-First protrusion, 1111-First surface, 112-First flange, 1121-Riveting part, 113-First receiving cavity, 114-Mounting part, 200-Pole post, 210-Limiting platform, 300-Adapter, 310-First connecting part, 320-Adapter, 330-Second connecting part, 400-Cell, 410-Electrode tab, 420-Electrode core, 500-First insulating component, 510-Second protrusion, 520-Second receiving cavity, 600-Second insulating component.
[0034] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0036] As described in the background section, welding the tabs to the upper surface of the adapter plate can improve the space utilization of the battery.
[0037] However, the tabs of a battery cell are typically stacked in multiple layers. When folded and welded to the adapter plate, they are squeezed by the cover plate, resulting in severe misalignment. The closer the tab is to the adapter plate, the longer the misaligned tab becomes, and the closer it is to the terminal post. This makes it extremely easy for the end of the tab near the adapter plate to insert into the gap between the adapter plate and the terminal post, creating a gap between them. This leads to poor solder joints when welding the terminal post and adapter plate, resulting in poor welding quality between the tab and the adapter plate. Ultimately, this leads to a large current difference and heat generation between the adapter plate and the terminal post, making the battery prone to thermal runaway.
[0038] To address the aforementioned technical problems, this application provides a battery in which a first protrusion is added to the first wall of the casing to form a first receiving cavity between the first wall and the adapter. The tab portion of the battery cell extends into the first receiving cavity and is welded to the adapter. A first flange is added to the first wall and riveted to the terminal post. The riveting of the first flange, after the tab portion is connected to the adapter, improves assembly convenience. The thickness m of the tab portion of the battery cell and the minimum distance d between the edge of the first protrusion and the first flange satisfy d × m = 0.4 mm. 2 -2.2mm 2 This design prevents the tabs from being too thin, which would affect the flow capacity, and also prevents the tabs from being too thick, allowing the first receiving cavity to effectively accommodate the tabs. This reduces the probability of tab misalignment in the stacked tab configuration, increases the distance between the end of the tab and the edge of the pole post, and prevents the tab from being inserted between the pole post and the adapter. It also ensures that there is an appropriate gap between the edge of the first protrusion and the first flange, so as not to affect the riveting of the first flange, thereby ensuring the assembly strength between the pole post and the first wall.
[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0040] This application provides a battery; please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 As shown, similar to existing batteries, it includes a housing 100, a cell 400, an adapter 300, and terminals 200. The housing 100 has a cavity inside, and the cell 400 is located in the cavity. The cell 400 includes an electrode core 420 and a tab 410. The tab 410 is a conductive part led out from the electrode core 420 and is usually made of a conductive metal material. The tab 410 is electrically connected to the terminal 200 through the adapter 300.
[0041] Specifically, the electrode core 420 is typically composed of multiple positive and negative electrode sheets stacked or wound alternately. Adjacent positive and negative electrode sheets are separated by a separator. Active materials are coated on both the positive and negative electrode sheets, and these active materials undergo ion exchange through an electrolyte, thereby achieving the storage and release of electrical energy. Both the positive and negative electrode sheets have tabs extending from their ends; that is, the tab portion 410 consists of multiple stacked tabs. The tab portion 410 can be divided into a positive tab portion and a negative tab portion. The positive tab portion extends from the stacked positive electrode sheets, and the positive tabs are also stacked in multiple layers. The negative tab portion extends from the stacked negative electrode sheets, and the negative tabs are also stacked in multiple layers.
[0042] The biggest difference in this embodiment is that the housing 100 has a first wall 110, and the adapter 300 is located between the first wall 110 and the battery cell 400. It can also be understood that the first wall 110, the adapter 300 and the battery cell 400 are arranged sequentially along the Z direction. The first wall 110 has a first protrusion 111, which protrudes away from the adapter 300 to form a first receiving cavity 113 on the side of the first wall 110 adjacent to the adapter 300. The electrode tab 410 extends into the first receiving cavity 113 and is welded to the adapter 300. That is, the electrode tab 410 bends around the gap between the lead-out piece and the housing 100 and enters the first receiving cavity 113. At this time, the multiple layers of electrode tabs of the electrode tab 410 are stacked along the Z direction. A first connecting hole extending in the Z direction is provided on the first wall 110. One end of the pole post 200 passes through the first connecting hole and is welded to the adapter 300, while the other end is located inside the first connecting hole or extends outside the first connecting hole.
[0043] It should be noted that the housing 100 may include a main body and a first wall 110. The first wall 110 is connected to the main body by common methods such as welding. After the battery cell 400 is installed in the cavity inside the housing 100, the opening on the cavity through which the battery cell 400 enters and exits is sealed by the first wall 110.
[0044] The first wall 110 is also provided with a first flange 112 on the side opposite to the adapter 300. The first flange 112 is wrapped around the periphery of the terminal post 200. Before battery assembly, the first flange 112 extends along the Z direction. After the electrode tab 410 is welded to the adapter 300 and the terminal post 200 is welded to the adapter 300, the end of the first flange 112 is riveted with a tool to form a riveted part 1121 riveted on the terminal post 200. At this time, by setting the cooperation structure between the first wall 110 and the terminal post 200, or by using the limiting of the electrode core 420, the relative position between the terminal post 200, the adapter 300 and the first wall 110 can be restricted together, which can greatly improve the convenience of assembly. In addition, if the end of the pole post 200 away from the adapter 300 is located inside the first connecting hole, the riveting part 1121 can be directly pressed against the top of the pole post 200; if the end of the pole post 200 away from the adapter 300 extends outside the first connecting hole, a limiting platform 210 can be added to the pole post 200, and the riveting part 1121 can be pressed against the limiting platform 210, or the riveting part 1121 can be riveted to the end of the pole post 200.
[0045] It should be noted that the first wall 110 is usually made of metal, which can provide electromagnetic shielding and has high strength. When the first wall 110 is made of metal, the first wall 110 and the pole post 200 are generally separated by a second insulating member 600. That is, the connection hole and the pole post 200 are insulated by the second insulating member 600, and the first flange 112 and the pole post 200 are also insulated by the second insulating member 600 to prevent direct contact between the first wall 110 and the pole post 200.
[0046] Let m be the thickness of the tab 410, and d be the minimum distance between the edge of the first protrusion 111 and the first flange 112. Then d × m is 0.4 mm. 2 -2.2mm 2 It should be noted that the product of d and m is only to restrict the relationship between d and m, and the unit has no special meaning.
[0047] Specifically, during battery assembly, the tab 410 can be folded from one side of the adapter 300, partially wrapping around between the adapter 300 and the first wall 110, and welded to the adapter 300. At this time, this portion of the tab 410 can be located within the first receiving cavity 113, which provides space in the Z direction to accommodate the tab 410. Compared to the traditional battery where the cover plate is directly pressed onto the tab, this reduces the amount of tab material. The staggered arrangement of the tabs 410 increases the distance between the end of the tab 410 and the edge of the terminal 200, making it less likely for the end of the tab 410 to be inserted into the gap between the terminal 200 and the adapter 300. This prevents the tab 410 from affecting the welding between the terminal 200 and the adapter 300, improves the welding quality between the terminal 200 and the adapter 300, ensures the overcurrent capacity between the terminal 200 and the adapter 300, and reduces the probability of battery thermal runaway.
[0048] In practical applications, it has been found that if the thickness m of the tab 410 is too thick, although the current carrying capacity of the tab 410 can be guaranteed, it will cause serious misalignment of the multiple tabs of the tab 410. In this case, the first receiving cavity 113 is unable to effectively prevent the end of the tab 410 from being inserted between the pole post 200 and the adapter 300. On the other hand, if the thickness m of the tab 410 is too thin, although the end of the tab 410 can be effectively prevented from being inserted between the pole post 200 and the adapter 300, it will result in poor current carrying capacity of the tab 410.
[0049] The smaller the value of d, the larger the size of the first protrusion 111, which allows the electrode lug 410 to be better accommodated in the first receiving cavity 113, making it less likely for the electrode lug 410 to be inserted between the pole post 200 and the adapter 300. However, if the value of d is too small, the first protrusion 111 will obstruct the tool used to rivet the first flange 112, making it more difficult to rivet the first flange 112 onto the pole post 200, affecting the rivet strength of the first flange 112 onto the pole post 200, and making the assembly between the pole post 200 and the first flange 112 prone to failure.
[0050] In actual use, after multiple tests, it was found that when d×m is 0.4mm 2 -2.2mm 2This design not only prevents the tab 410 from being too thin, which would affect the flow capacity, but also prevents the tab 410 from being too thick, allowing the first receiving cavity 113 to effectively accommodate the tab 410. This reduces the probability of misalignment of the tabs in the stacked arrangement of the tabs 410, and makes the distance between the end of the tab 410 and the edge of the pole post 200 greater, preventing the tab 410 from being inserted between the pole post 200 and the adapter 300. It also ensures that there is an appropriate gap between the edge of the first protrusion 111 and the first flange 112, so as not to affect the riveting of the first flange 112, thereby ensuring the assembly strength between the pole post 200 and the first wall 110.
[0051] When d×m is less than 0.4mm 2 When the value of d is extremely small, the riveting quality of the first flange 112 to the pole post 200 is poor, resulting in poor assembly strength between the first wall 110 and the pole post 200, which can easily lead to assembly failure.
[0052] When d×m is greater than 2.2mm 2 If the value of d is large, it means that the size of the first protrusion 111 is small. Therefore, whether the value of d or the value of m is large, it will make it very easy for the end of the tab 410 to be inserted into the gap between the adapter 300 and the terminal 200, affecting the welding quality between the terminal 200 and the adapter 300, resulting in a large current difference and heat generation between the terminal 200 and the adapter 300, which can easily cause battery thermal runaway.
[0053] In some embodiments of this application, the first wall 110 also has a mounting portion 114, the mounting portion 114 is provided with a first connecting hole, one end of the pole post 200 passes through the first connecting hole and is welded to the adapter 300, the other end of the pole post 200 extends to the outside of the first connecting hole, the first flange 112 is wrapped around the periphery of the mounting portion 114 and along the X direction, there is a gap between the mounting portion 114 and the first flange 112.
[0054] A limiting platform 210 is provided on the pole post 200. The limiting platform 210 protrudes outward from the side of the pole post 200. The limiting platform 210 is located at the end of the first connecting hole opposite to the adapter 300. The riveting part 1121 is located on the side of the limiting platform 210 opposite to the adapter 300, so as to press the limiting platform 210 onto the mounting part 114, thereby effectively limiting the relative position between the pole post 200, the adapter 300 and the first wall 110.
[0055] At this time, if the pole post 200 and the first wall 110 are separated by the second insulating member 600, the second insulating member 600 can be divided into a first insulating ring and a second insulating ring made of insulating material. The first insulating ring is fitted onto the limiting platform 210 and the pole post 200 on the outside of the remaining part of the limiting platform 210 away from the adapter 300, separating the first flange 112 and the pole post 200. The second insulating ring is partially overlapped on the mounting part 114 and partially located in the first connecting hole, separating the mounting part 114 and the pole post 200 to facilitate assembly.
[0056] It should be noted that the electrode post 200 in the above embodiments typically includes a positive electrode post and a negative electrode post. When only one first protrusion 111 is provided, the positive electrode post and the negative electrode post can be respectively provided at both ends of the first protrusion 111, or separate first protrusions 111 can be provided corresponding to the positive electrode post and the negative electrode post. The adapter 300 includes a positive electrode adapter piece and a negative electrode adapter piece, which are provided at the corresponding positions of the positive electrode post and the negative electrode post. Two mounting parts 114 are also provided, with positions corresponding to the positive electrode post and the negative electrode post. The electrode tab 410 bends along the X direction from the opposite sides of the positive electrode adapter piece or the negative electrode adapter piece and extends into the first receiving cavity 113.
[0057] Further, please see Figure 3 and Figure 5 As shown, for ease of assembly, both the positive and negative electrode adapters include a first connecting portion 310 and a second connecting portion 330 disposed on both sides of the first connecting portion 310. The first connecting portion 310 and the second connecting portion 330 are connected by an inclined adapter portion 320. The electrode post 200 is connected to the first connecting portion 310, and the electrode tab 410 is connected to the second connecting portion 330.
[0058] The height of the second connecting part 330 in the Z direction is less than the height of the first connecting part 310. During assembly, the battery cell 400 can push the second connecting part 330 to rotate and deform through the adapter part 320, thereby reducing the distance between the second connecting part 330 and the first wall 110 to save space.
[0059] Furthermore, in order to save materials and reduce the weight of the lead sheet, the first connecting part 310 can be provided only in the area corresponding to the pole 200, that is, the length of the second connecting part 330 along the Y direction is greater than the length of the first connecting part 310, forming a U-shaped structure, which does not affect the connection effect between the second connecting part 330 and the pole tab, and can reduce the amount of material used in the lead sheet.
[0060] In some embodiments of this application, after the tab 410 is welded to the adapter 300, the thickest area in the Z direction is the welding area of the tab 410 and the adapter 300, that is, the area where the solder mark is located. At this time, the welding area of the tab 410 and the adapter 300 can be located at least partially within the first receiving cavity 113, so that the first receiving cavity 113 can better accommodate the tab 410.
[0061] For some embodiments of this application, please refer to Figure 3 and Figure 4 As shown, the first protrusion 111 and the first flange 112 have an inclined first surface 1111 on the side adjacent to each other, and the minimum distance between the first surface 1111 and the first flange 112 gradually increases from the adapter 300 to the first wall 110.
[0062] Specifically, the first surface 1111 is inclined, that is, the first protrusion 111 is inclined near the wall of the first flange 112. When riveting the first flange 112, this method makes the d value of the area near the end of the first flange 112 away from the adapter 300 larger, which can maximize the space of the first receiving cavity 113 while leaving sufficient riveting processing space for the first flange 112.
[0063] In some embodiments of this application, the first protrusion 111 is located on the side adjacent to the pole post 200 and surrounds the outside of the first flange 112, and the portion of the first protrusion 111 surrounding the outside of the first flange 112 matches the shape of the first flange 112.
[0064] Taking the pole post 200 as a cylindrical shape as an example, the mounting part 114 is also circular. The first flange 112 is a ring structure surrounding the outside of the mounting part 114. The first protrusion 111 has an arc-shaped groove on the side adjacent to the pole post 200. The arc-shaped groove surrounds the outside of the first flange 112 and is coaxial with the first flange 112. This makes the distance between the arc-shaped groove and the first flange 112 uniform, which is convenient for riveting the end of the first flange 112 onto the pole post 200.
[0065] In some embodiments of this application, along the direction from the adapter 300 to the first wall 110, i.e., the Z direction, the maximum height h of the first protrusion 111 protruding from the surface of the first wall 110 is 0.5mm-1.5mm. That is, the maximum distance h between the first protrusion 111 and the surface of the first wall 110 facing away from the adapter 300 is 0.5mm-1.5mm. Here, the first wall facing away from the surface of the adapter 110 generally refers to the area of the first wall 110 that is not the mounting portion 114.
[0066] Specifically, if the first protrusion 111 protrudes too high from the surface of the first wall 110, it will reduce the battery's heat dissipation capacity and may also affect the processing of the first flange 112. Conversely, if the first protrusion 111 protrudes too low from the surface of the first wall 110, the first receiving cavity 113 will have difficulty effectively accommodating the tab 410, thus failing to effectively prevent the end of the tab 410 from being inserted between the terminal post 200 and the adapter 300.
[0067] After multiple tests, it was found that, combined with the common thickness of the tab 410, when the maximum height of the first protrusion 111 protruding from the surface of the first wall 110 is 0.5mm-1.5mm, the first receiving cavity 113 can effectively accommodate the tab 410 without affecting the heat dissipation capacity of the battery.
[0068] In some embodiments of this application, the height of the first flange 112 along the direction from the adapter 300 to the first wall 110 is 1.5mm-3.5mm.
[0069] It should be noted that the height of the first flange 112 here refers to the distance between the surface of the first wall 110 away from the adapter 300 (usually the area of the first wall 110 that is not mounted on the mounting part 114) and the surface of the riveting part 1121 away from the adapter 300, that is, the final height of the first flange 112 after riveting.
[0070] Specifically, h is 0.5mm-1.5mm, and the height of the first flange 112 is 1.5mm-3.5mm. In the Z direction, after the riveting part 1121 is processed, the position of its upper surface is flush with or higher than the upper surface of the first protrusion 111. This can reduce the influence of the first protrusion 111 on the area of the first flange 112 used to bend and form the riveting part 1121 during the riveting process, thereby helping to improve the riveting strength between the first flange 112 and the pole post 200.
[0071] In some embodiments of this application, the battery further includes a first insulating member 500 located between the adapter 300 and the first wall 110. The first insulating member 500 has a second protrusion 510 located within the first receiving cavity 113. The second protrusion 510 and the first protrusion 111 protrude in the same direction to form a second receiving cavity 520 by isolating a portion of the first receiving cavity 113 on the side adjacent to the first insulating member 500 and the adapter 300. The tab portion 410 extends into the second receiving cavity 520 for welding to the adapter 300.
[0072] The first insulating member 500 is made of insulating material. When the first wall 110 is made of metal material, the first insulating member 500 can separate the first wall 110 and the adapter 300, and the first wall 110 and the electrode lug 410. After the second protrusion 510 adapted to the shape of the first protrusion 111 is provided on the first insulating member 500, the electrode lug 410 can be accommodated through the second receiving cavity 520. This can not only play a good role in insulation and separation, but also prevent the end of the electrode lug 410 from being inserted between the pole post 200 and the adapter 300.
[0073] In some embodiments of this application, the value of d ranges from 1mm to 12mm. Within this range, the size of the first protrusion 111 can be used to accommodate the tab 410 of most commonly used battery sizes, reducing the probability that the end of the tab 410 is inserted into the gap between the terminal post 200 and the adapter 300. Furthermore, this value of d can also be used to rivet the first flange 112 of most commonly used battery sizes to the terminal post 200, which helps to reduce the impact of the first protrusion 111 on the riveting process of the first flange 112.
[0074] In some embodiments of this application, the value of m ranges from 0.15mm to 1.6mm. Within this range, the tab thickness requirements of most commonly used battery sizes can be met. It has good current carrying capacity and suitable thickness, which can be well accommodated in the first receiving cavity 113 without causing the height of the first protrusion 111 to be too high.
[0075] It should be noted that m represents the total thickness of all the stacked tabs. For example, the positive tab portion of a certain battery cell 400 consists of 51 positive tabs, and the thickness of a single positive tab is 0.013 mm. Therefore, the total thickness of the positive tab portion is the product of 0.013 mm and 51, which is 0.66 mm. Similarly, the negative tab portion of a certain battery cell 400 consists of 52 negative tabs, and the thickness of a single negative tab is 0.0045 mm. Therefore, the total thickness of the negative tab portion is the product of 0.0045 mm and 52, which is 0.23 mm.
[0076] This application also provides a battery pack, including the battery described in the above embodiments.
[0077] It should be noted that the battery pack also includes components such as a thermal management system for controlling battery temperature, and it may include one or more batteries, with multiple batteries connected in series or parallel.
[0078] This application also provides an electrical device, including an electrical device and a battery or battery pack as described in the above embodiments, wherein the battery or battery pack is used to supply power to the electrical device.
[0079] It should be noted that electrical equipment includes, but is not limited to, electric vehicles, hybrid vehicles, medical equipment, aerospace equipment, energy storage systems, and home electronic products that require power from batteries or battery packs.
[0080] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0081] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A battery, characterized in that, include: A housing (100) having a first wall (110); A battery cell (400) is located inside the housing (100). The battery cell (400) includes a tab (410) with a thickness of m. An adapter (300) is located between the battery cell (400) and the first wall (110); A pole post (200) is welded to the adapter (300) by passing through the first wall (110) along a first direction; The first wall (110) has a first protrusion (111) that protrudes away from the adapter (300) to form a first receiving cavity (113) on the side of the first wall (110) adjacent to the adapter (300). The electrode lug (410) extends into the first receiving cavity (113) and is welded to the adapter (300). The side of the first wall (110) away from the adapter (300) also has a first flange (112) that wraps around the outside of the pole post (200). The end of the first flange (112) is bent to form a riveting part (1121) that is riveted to the end of the pole post (200) away from the adapter (300). The minimum distance between the edge of the first protrusion (111) and the first flange (112) is d, where d×m is 0.4mm. 2 -2.2mm 2 .
2. The battery according to claim 1, characterized in that, The welding area between the tab (410) and the adapter (300) is at least partially located within the first receiving cavity (113).
3. The battery according to claim 1, characterized in that, The first protrusion (111) has an inclined first surface (1111) on the side adjacent to the first flange (112), and the minimum distance between the first surface (1111) and the first flange (112) gradually increases from the adapter (300) to the first wall (110).
4. The battery according to claim 1, characterized in that, The first protrusion (111) is located on the side adjacent to the pole post (200) and surrounds the outside of the first flange (112), and the part of the first protrusion (111) surrounding the outside of the first flange (112) matches the shape of the first flange (112).
5. The battery according to claim 1, characterized in that, Along the direction from the adapter (300) to the first wall (110), the first protrusion (111) is away from the surface of the adapter (300), and the maximum distance between the first wall (110) and the surface of the adapter (300) is away from the surface of the first wall (110) is 0.5mm-1.5mm.
6. The battery according to claim 5, characterized in that, Along the direction from the adapter (300) to the first wall (110), the surface of the riveting part (1121) facing away from the adapter (300) is 1.5mm-3.5mm away from the surface of the first wall (110) facing away from the adapter (300).
7. The battery according to claim 1, characterized in that, It also includes a first insulating member (500) located between the adapter (300) and the first wall (110). The first insulating member (500) has a second protrusion (510) located within the first receiving cavity (113). The second protrusion (510) and the first protrusion (111) protrude in the same direction to divide the first receiving cavity (113) on the side adjacent to the first insulating member (500) and the adapter (300) to form a second receiving cavity (520). The tab (410) extends into the second receiving cavity (520).
8. The battery according to any one of claims 1-7, characterized in that, d is 1mm-12mm.
9. The battery according to claim 8, characterized in that, m is 0.15mm-1.6mm.
10. The battery according to any one of claims 1-7, characterized in that, The electrode post (200) includes a positive electrode post and a negative electrode post, which are respectively disposed at both ends of the first protrusion (111); The adapter (300) includes a positive adapter piece and a negative adapter piece, which are connected to the positive terminal and the negative terminal respectively.
11. The battery according to claim 10, characterized in that, Both the positive electrode adapter and the negative electrode adapter include a first connecting part (310) and a second connecting part (330) disposed on both sides of the first connecting part (310). The first connecting part (310) and the second connecting part (330) are connected by an inclined connecting part (320). The pole post (200) is connected to the first connecting part (310), and the tab part (410) is connected to the second connecting part (330).
12. A battery pack, characterized in that, Includes the battery as described in any one of claims 1-11.
13. An electrical appliance, characterized in that, It includes an electrical device, and a battery as described in any one of claims 1-11 or a battery pack as described in claim 12, wherein the battery or the battery pack is used to supply power to the electrical device.