Welding protection assembly, battery and electric device

Abstract

The application relates to the technical field of batteries, and provides a welding protection assembly, a battery and a power utilization device. The welding protection assembly comprises a connecting piece and a light-transmitting piece. The connecting piece is connected with a cover plate and / or a tab of the battery, so that the connecting piece can be fixed with the cover plate and the tab. A light-transmiting opening of the connecting piece is a through groove structure on the connecting piece, so that light can pass through the light-transmitting opening. The light-transmitting opening is opposite to a welding position of the tab and a lead-out piece, and the light-transmitting piece covers the light-transmitting opening, so that the light can pass through the light-transmitting piece and the mounting opening to reach the welding position of the tab and the lead-out piece. In this way, when the tab and the lead-out piece are welded through a laser welding process, the welding laser can pass through the light-transmitting piece and the light-transmitting opening to weld the tab and the lead-out piece, and foreign matters generated in the welding process of the tab and the lead-out piece are enclosed in the connecting piece and the light-transmitting piece, so that the foreign matters are prevented from splashing into the environment, foreign matters are prevented from entering the battery, and the safety and reliability of the battery are better.

Description

Technical Field

[0001] This application relates to a welding protection component, a battery, and an electrical device, belonging to the field of battery technology. Background Technology

[0002] During battery assembly, the tabs of the battery cells need to be electrically connected to the connecting components of the cover plate, such as the leads. Welding can reliably connect the tabs and leads, but it generates a large amount of metal slag, which splashes into the ambient air. This slag can then re-coat the battery cover plate surface. As the battery manufacturing process progresses, some of this slag may migrate into the battery's interior and even into the battery cells, leading to physical discharge and internal short circuits, ultimately affecting the battery's safety and reliability. Utility Model Content

[0003] This application provides a welding protection component, a battery, and an electrical device to solve the problem in the related art where metal welding slag generated during the welding process of the battery's tabs and leads affects the safety and reliability of the battery.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] In a first aspect, this application provides a welding protection assembly for covering the weld between the battery's tabs and the lead-out members on a cover plate, the welding protection assembly comprising:

[0006] A connector has a light-transmitting opening that passes through the connector. The connector is connected to a cover plate and / or an electrode lug. At least a portion of the light-transmitting opening is opposite to the welding joint of the electrode lug and the lead-out member.

[0007] A light-transmitting element is disposed on the connector, and the light-transmitting element covers the light-transmitting opening.

[0008] In some embodiments, the orthographic projection of the connector on the preset plane is a first projection, and the orthographic projection of the light-transmitting component on the preset plane is a second projection. The second projection is located within the first projection, and the preset plane is perpendicular to the orientation of the light-transmitting opening.

[0009] In some implementations, the length of the first projection is greater than the length of the second projection, and the width of the first projection is greater than the width of the second projection.

[0010] In some embodiments, the orthographic projection of the light-transmitting opening onto the preset plane is a third projection, and the area of ​​the third projection is smaller than the area of ​​the second projection.

[0011] In some embodiments, the length of the second projection is greater than the length of the third projection, and the width of the second projection is greater than the width of the third projection.

[0012] In some embodiments, at least one corner of the light-transmitting opening is rounded.

[0013] In some embodiments, the connector includes a connecting body and an adhesive layer, the light-transmitting opening is formed in the connecting body, the adhesive layer is stacked on the connecting body, and the connector is connected to the tab and / or cover plate through the adhesive layer.

[0014] In some embodiments, the light-transmitting element is stacked on the side of the adhesive layer facing away from the connecting body, and the light-transmitting element is bonded to the adhesive layer.

[0015] In some embodiments, the connector is a flexible structural component.

[0016] In some embodiments, the material of the connecting body is polyolefin, polyester or polyether, and the material of the adhesive layer is polyacrylic acid, polyimide or polyvinylidene fluoride.

[0017] In some embodiments, the light-transmitting element is made of calcium fluoride, quartz, sapphire, barium fluoride, zinc selenide, or germanium.

[0018] In some embodiments, the thickness of the connector in the direction of the light-transmitting opening is 0.01mm-2mm, and the thickness of the light-transmitting element in the direction of the light-transmitting opening is 0.05mm-5mm.

[0019] Secondly, based on the welding protection assembly described above, this application also provides a battery, including a housing, a cover plate, a lead-out component, a battery cell, and the welding protection assembly described above. The housing has a cavity and an installation port, the cavity is connected to the installation port, the battery cell is disposed in the cavity, the cover plate blocks the installation port, the lead-out component is disposed on the cover plate, the battery cell includes a tab, the tab is welded to the lead-out component, the connector is connected to the cover plate and / or the tab, and at least a portion of the light-transmitting component is opposite to the weld joint between the tab and the lead-out component.

[0020] In some embodiments, the connector surrounds the weld between the electrode lug and the lead-out member.

[0021] In some embodiments, the light-transmitting element is located on the side of the connector facing the cover plate.

[0022] Thirdly, based on the battery described above, this application also provides an electrical device that includes the battery described above.

[0023] The welding protection assembly provided in this application connects the connector to the battery cover and / or tabs, allowing the connector to be fixed to the cover and tabs. The connector has a through-slot structure, allowing light to pass through. This through-slot faces the welding point between the tab and the lead-out component, and the light-transmitting component covers it, allowing light to pass through the component and the mounting opening to reach the welding point. Thus, when the tab and lead-out component are welded using laser welding, the welding laser passes through the component and the through-slot to weld them. Foreign matter generated during the welding process is contained within the connector and the component, preventing it from splashing into the environment and thus preventing it from entering the battery, resulting in improved battery safety and reliability.

[0024] The battery provided in this application includes the aforementioned welding protection components, which enhances the safety and reliability of the battery.

[0025] The electrical equipment provided in this application includes the aforementioned battery, which improves the safety and reliability of the electrical equipment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the welding protection assembly provided in an embodiment of this application;

[0028] Figure 2 A schematic diagram showing the welding protection assembly provided in this application covering the welding joint between the electrode tab and the lead-out member;

[0029] Figure 3 A schematic diagram of the connector of the welding protection assembly provided in the embodiments of this application;

[0030] Figure 4 A schematic diagram of the light-transmitting element of the welding protection assembly provided in the embodiments of this application;

[0031] Figure 5 This is a schematic diagram of the internal structure of the welding protection assembly provided in the embodiment of this application in the thickness direction;

[0032] Figure 6 A schematic diagram of a battery provided in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the battery cover provided in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100 - Connector; 110 - Connector body; 111 - Light-transmitting opening; 112 - Corner; 120 - Adhesive layer;

[0036] 200 - Light-transmitting component;

[0037] 300 - Housing;

[0038] 400 - Cover plate; 410 - Lead-out part;

[0039] 500-pole ear. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] During battery assembly, the tabs of the battery cells need to be electrically connected to the connecting components of the cover plate, such as the leads. Welding can reliably connect the tabs and leads, but it generates a large amount of metal slag, which splashes into the ambient air. This slag can then re-coat the battery cover plate surface. As the battery manufacturing process progresses, some of this slag may migrate into the battery's interior and even into the battery cells, leading to physical discharge and internal short circuits, ultimately affecting the battery's safety and reliability.

[0042] Specifically, currently, when welding battery tabs to leads, the weld joint is covered after welding to prevent foreign objects from entering the battery through the weld. However, this method does not solve the problem of metal slag spatter generated during the welding process.

[0043] This application proposes a welding protection component. A connector is attached to the battery cover and / or tabs, allowing the connector to be fixed to the cover and tabs. The connector has a through-slot structure, allowing light to pass through. The through-slot is opposite the welding point between the tab and the lead-out component. The light-transmitting component covers the through-slot, allowing light to pass through the component and the mounting opening to reach the welding point. When the tab and lead-out component are welded using laser welding, the welding laser passes through the component and through the through-slot to weld them. Foreign matter generated during the welding process is contained within the connector and the component, preventing it from splashing into the environment and thus preventing it from entering the battery, resulting in improved battery safety and reliability.

[0044] The battery proposed in this application includes the aforementioned welding protection components, which improves the safety and reliability of the battery.

[0045] The electrical equipment proposed in this application includes the aforementioned battery, which improves the safety and reliability of the electrical equipment.

[0046] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0047] This application discloses a welding protection assembly, with reference to... Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, it includes a connector 100 and a light-transmitting element 200. The welding protection assembly is disposed at the welding point between the battery tab 500 and the lead-out element 410 on the cover plate 400 to cover the welding point between the tab 500 and the lead-out element 410.

[0048] The connector 100 is the basic component of the welding protection assembly of this application, and it can provide an installation base for at least some other components of the welding protection assembly. The connector 100 is connected to at least one of the battery's tabs 500 and cover plate 400. When the connector 100 is connected to the tab 500, since the tab 500 and the lead-out member 410 will eventually be welded together, the connector 100 is also fixed to the cover plate 400. When the connector 100 is connected to the cover plate 400, since the tab 500 and the lead-out member 410 will eventually be welded together, the connector 100 is also fixed to the tab 500. When the connector 100 is connected to both the tab 500 and the cover plate 400 simultaneously, the connection between the connector 100 and both the tab 500 and the cover plate 400 is more stable and reliable.

[0049] The connector 100 has a light-transmitting opening 111 that extends through the connector 100. Specifically, the light-transmitting opening 111 extends through the connector 100 along its thickness direction, making it a through-groove structure. When the welding protection assembly of this application is applied to a battery, the light-transmitting opening 111 is opposite to the welding joint of the battery's tab 500 and lead-out member 410, allowing the welding joint of the tab 500 and lead-out member 410 to be exposed through the light-transmitting opening 111.

[0050] Specifically, the connector 100 can be connected to the portion around the welded joint of the lead-out member 410 and the tab 500, so that the connector 100 can surround the welded joint of the lead-out member 410 and the tab 500, and the welded joint of the lead-out member 410 and the tab 500 can be opposite to the light-transmitting opening 111.

[0051] The light-transmitting element 200 can transmit light, specifically laser light. The light-transmitting element 200 is disposed on the connector 100, and covers the light-transmitting opening 111 of the connector 100, such that at least a portion of the light-transmitting element 200 can be aligned with the solder joint of the lead-out element 410 and the tab 500. Furthermore, it should be understood that since the light-transmitting element 200 covers the light-transmitting opening 111, it also covers the solder joint of the lead-out element 410 and the tab 500.

[0052] Since the light-transmitting element 200 covers the light-transmitting opening 111 of the connector 100, the light-transmitting element 200 can block the light-transmitting opening 111. In this way, the welding protection assembly formed by the connector 100 and the light-transmitting element 200 can completely cover the welding joint of the lead-out element 410 and the electrode 500, so that the welding joint of the lead-out element 410 and the electrode 500 is not connected to the external space.

[0053] The lead-out component 410 and the tab 500 can be welded by laser welding. The welding laser can pass through the light-transmitting component 200 and the light-transmitting opening 111 to weld the tab 500 to the lead-out component 410. Foreign objects generated during the welding process between the tab 500 and the lead-out component 410 will be sealed inside by the connector 100 and the light-transmitting component 200 to prevent foreign objects from splashing into the environment, thereby preventing foreign objects from entering the battery and making the battery safer and more reliable.

[0054] In some implementations, reference Figure 1 As shown, a virtual preset plane is defined, which is opposite to the connector 100 and perpendicular to the orientation of the light-transmitting opening 111. The orthographic projection of the connector 100 onto the preset plane in the direction toward the preset plane is the first projection, and the orthographic projection of the light-transmitting component 200 onto the preset plane in the direction toward the preset plane is the second projection, which is located within the first projection.

[0055] Specifically, the area of ​​the second projection is not greater than the area of ​​the first projection, so that when the light-transmitting element 200 is disposed on the connector 100, the edge of the light-transmitting element 200 will not exceed the edge of the connector 100. This can save the material used for the light-transmitting element 200, making the manufacturing cost of the welding protection component of this application lower.

[0056] In some implementations, reference Figure 1 As shown, the length of the first projection in this application is greater than the length of the second projection, and the width of the first projection is also greater than the width of the second projection. Thus, both the length and width of the first projection are greater than those of the second projection. This ensures that no part of the circumferential edge of the light-transmitting element 200 exceeds the edge of the connecting element 100, thereby further reducing the material used in the light-transmitting element 200 and lowering the manufacturing cost of the welding protection assembly in this application.

[0057] Furthermore, by ensuring that none of the portions of the circumferential edge of the light-transmitting element 200 exceed the edge of the connector 100, the connector 100 can better support the light-transmitting element 200, making the structure of the welding protection assembly of this application more stable and reliable.

[0058] In some implementations, reference Figure 1 As shown, the orthographic projection of the light-transmitting opening 111 of the connector 100 in this application onto the preset plane in the direction facing the preset plane is a third projection. The area of ​​the third projection is smaller than the area of ​​the second projection. In this way, the light-transmitting member 200 can not only cover the light-transmitting opening 111 of the connector 100, but also allows a portion of the light-transmitting member 200 to be opposite to the area on the connector 100 other than the light-transmitting opening 111. This allows the light-transmitting member 200 to be connected to the surface of the connector 100 on one side in the thickness direction of the connector 100, ultimately making the connection between the light-transmitting member 200 and the connector 100 more stable and reliable.

[0059] Specifically, the light-transmitting element 200 can be stacked on the connector 100, which can increase the contact area between the light-transmitting element 200 and the connector 100, making the connection between the light-transmitting element 200 and the connector 100 stable.

[0060] In some implementations, reference Figure 1 As shown, the length of the second projection is greater than the length of the third projection, and the width of the second projection is also greater than the width of the third projection. Thus, both the length and width of the second projection are greater than those of the third projection. Each part of the circumferential edge of the light-transmitting element 200 extends beyond the edge of the light-transmitting opening 111, ensuring that each part of the circumferential edge of the light-transmitting element 200 is opposite to the connecting element 100. This allows each part of the circumferential edge of the light-transmitting element 200 to be connected to the connecting element 100. This further increases the contact area between the light-transmitting element 200 and the connecting element 100, thereby further improving the connection stability between the connecting element 100 and the light-transmitting element 200.

[0061] In some embodiments, the light-transmitting element 200 of this application may further include a first portion and a second portion, wherein the first portion is superimposed on the second portion. The orthographic projection of the first portion on a preset plane is smaller than the orthographic projection of the second portion on the preset plane. The first portion may be embedded in the light-transmitting opening 111 of the connector 100, and the inner wall of the light-transmitting opening 111 may serve to limit the first portion, thereby ensuring a stable connection between the first portion and the connector 100. The second portion may be superimposed on the connector 100, thereby connecting the connector 100 and the second portion. In this way, both the first and second portions of the light-transmitting element 200 can be connected to the connector 100, further enhancing the connection stability between the light-transmitting element 200 and the connector 100.

[0062] Furthermore, by embedding the second part into the light-transmitting opening 111 of the connector 100, the second part can be snapped into the light-transmitting opening 111, and the inner wall of the light-transmitting opening 111 can limit the light-transmitting element 200 in a direction perpendicular to the thickness direction of the connector 100, so that the light-transmitting element 200 remains stable.

[0063] In some implementations, reference Figure 3 As shown, in this application, at least one corner 112 of the light-transmitting opening 111 of the connector 100 is rounded, which can reduce the internal stress of the connector 100 and reduce the risk of the connector 100 breaking. Specifically, the light-transmitting opening 111 may be provided with four corners 112, and all four corners 112 of the light-transmitting opening 111 may be rounded, which can further reduce the internal stress of the connector 100 and further reduce the risk of the connector 100 breaking.

[0064] In addition, the light-transmitting opening 111 has four corners 112 and a rectangular structure. This makes the area of ​​the light-transmitting opening 111 relatively large, allowing it to be more fully aligned with the welding joint of the tab 500 and the lead-out piece 410, thus fully protecting the welding joint of the tab 500 and the lead-out piece 410 and making the welding of the tab 500 and the lead-out piece 410 more convenient.

[0065] In other embodiments, the light-transmitting opening 111 of the connector 100 can also be set as a circle, so that the light-transmitting opening 111 has no corner 112 structure, which can further reduce the internal stress of the connector 100 and make the structure of the connector 100 more stable.

[0066] In addition, the corners of the light-transmitting element 200 can also be rounded to make the structure of the light-transmitting element 200 more stable.

[0067] In some implementations, reference Figure 5As shown, to enable the light-transmitting element 200 to connect with the connector 100, the connector 100 may include a connecting body 110 and an adhesive layer 120. A light-transmitting opening 111 is formed in the connecting body 110, and the adhesive layer 120 is stacked on the connecting body 110, specifically on one side of the connecting body 110 in its thickness direction. The adhesive layer 120 avoids the light-transmitting opening 111 to prevent it from obstructing it. The light-transmitting element 200 is stacked on the side of the adhesive layer 120 facing away from the connecting body 110, and is bonded to the adhesive layer 120. This allows the light-transmitting element 200 to be fixed to the connecting body 110, thereby securing the light-transmitting element 200 to the connector 100.

[0068] In other embodiments, the light-transmitting element 200 can also be connected to the connecting element 100 via snap-fit ​​connections. This ensures a stable connection between the light-transmitting element 200 and the connecting element 100, and facilitates easy assembly and disassembly. Specifically, snap-fit ​​structures can be provided at multiple corners 112 of the light-transmitting element 200, and the connecting element 100 can have multiple snap-fit ​​structures corresponding to the snap-fit ​​structures of the light-transmitting element 200. The snap-fit ​​structures of the connecting element 100 engage with the snap-fit ​​structures of the light-transmitting element 200 to ensure a stable connection between the light-transmitting element 200 and the connecting element 100.

[0069] In some implementations, reference Figure 1 and Figure 5 As shown, the connector 100 of this application is connected to at least one of the battery tab 500 and cover plate 400 through the adhesive layer 120. This eliminates the need for separate connection structures to connect the connector 100 to the tab 500 and / or cover plate 400, thus simplifying the welding protection assembly of this application.

[0070] Specifically, the light-transmitting element 200 is bonded to the adhesive layer 120 on the connector 100 near the light-transmitting opening 111. The adhesive layer 120 on the connector 100, which is relatively far from the light-transmitting opening 111 and is not blocked by the light-transmitting element 200, can be connected to the tab 500 and / or the cover plate 400. In this way, the light-transmitting element 200 can be sealed within the space formed by the connector 100 and the tab 500 and / or the cover plate 400, to further prevent the light-transmitting element 200 from detaching from the connector 100.

[0071] In other embodiments, adhesive layers 120 can be provided on opposite sides of the connecting body 110 in its thickness direction. The light-transmitting element 200 can be bonded to the adhesive layer 120 on one side of the connecting body 110, and the adhesive layer 120 on the other side of the connecting body 110 can be bonded to the tab 500 and / or the cover plate 400. In this way, the space between the connecting body 110 and the tab 500 and the cover plate 400 can be made smaller, and the connecting body 110 can be closer to the cover plate 400 and / or the tab 500, making the connection between the connector 100 and the cover plate 400 and / or the tab 500 more stable.

[0072] In some embodiments, the connector 100 of this application is a flexible structural component, allowing it to deform under external force. This allows the connector 100 to fit more fully against the tab 500 and / or the cover plate 400, reducing the gap between the connector 100 and the tab 500 and / or the cover plate 400, resulting in a more stable connection between the connector 100 and the tab 500 and / or the cover plate 400.

[0073] In some embodiments, the connecting body 110 of this application may be made of polyolefin, polyester, or polyether, making the connecting body 110 a flexible structural component. The connecting body 110 can deform to better fit the tab 500 and / or cover plate 400. Furthermore, using the aforementioned materials for the connecting body 110 can reduce its manufacturing cost, thereby lowering the manufacturing cost of the welding protection assembly of this application.

[0074] The adhesive layer 120 can be made of polyacrylic acid, polyimide or polyvinylidene fluoride, which makes the adhesive layer 120 adhesive. The use of the above materials can make the preparation cost of the adhesive layer 120 relatively low, thereby reducing the preparation cost of the welding protection component of this application.

[0075] In some embodiments, the light-transmitting element 200 of this application may be made of calcium fluoride, quartz, sapphire, barium fluoride, zinc selenide, or germanium. When the light-transmitting element 200 is made of calcium fluoride, quartz, sapphire, barium fluoride, zinc selenide, or germanium, it exhibits good light transmittance to lasers of different wavelengths.

[0076] Specifically, when the light-transmitting element 200 is made of calcium fluoride, it exhibits excellent light transmittance for lasers with wavelengths between 130nm and 7000nm. Therefore, when the light-transmitting element 200 is made of calcium fluoride, lasers with wavelengths between 130nm and 7000nm can be used to weld the battery's tabs 500 and leads 410, resulting in higher welding efficiency and better welding quality. Calcium fluoride material has a heat resistance exceeding 1250°C and a low coefficient of thermal expansion, approximately 18.9 × 10⁻⁻⁻⁶. 6 / K can maintain stability during welding, thereby preventing the light-transmitting part 200 from deforming during welding.

[0077] When the light-transmitting element 200 is made of quartz, i.e., silicon dioxide, it exhibits excellent light transmittance for lasers with wavelengths between 160nm and 3500nm. Therefore, when the light-transmitting element 200 is made of quartz, lasers with wavelengths between 160nm and 3500nm can be used to weld the battery's tabs 500 and leads 410, resulting in higher welding efficiency and better welding quality.

[0078] When the light-transmitting element 200 is made of sapphire (i.e., aluminum oxide), it exhibits excellent light transmittance for lasers with wavelengths between 200nm and 5500nm. Therefore, when the light-transmitting element 200 is made of sapphire, lasers with wavelengths between 200nm and 5500nm can be used to weld the battery's tabs 500 and leads 410, resulting in higher welding efficiency and better welding quality.

[0079] When the light-transmitting element 200 is made of barium fluoride, it exhibits excellent light transmittance for lasers with wavelengths between 150nm and 15000nm. Therefore, when the light-transmitting element 200 is made of barium fluoride, lasers with wavelengths between 150nm and 15000nm can be used to weld the battery's tabs 500 and leads 410, resulting in higher welding efficiency and better welding quality.

[0080] When the light-transmitting element 200 is made of zinc selenide, it exhibits excellent light transmittance for lasers with wavelengths between 500nm and 22000nm. Therefore, when the light-transmitting element 200 is made of zinc selenide, lasers with wavelengths between 500nm and 22000nm can be used to weld the battery's tab 500 and lead-out element 410, resulting in higher welding efficiency and better welding quality.

[0081] When the light-transmitting element 200 is made of germanium, it exhibits excellent light transmittance for lasers with wavelengths between 2000nm and 20000nm. Therefore, when the light-transmitting element 200 is made of germanium, lasers with wavelengths between 2000nm and 20000nm can be used to weld the battery's tabs 500 and leads 410, resulting in higher welding efficiency and better welding performance.

[0082] In some embodiments, the thickness of the connector 100 in the direction of the light-transmitting opening 111 is 0.01mm-2mm, and the thickness of the light-transmitting element 200 in the direction of the light-transmitting opening 111 is 0.05mm-5mm.

[0083] By setting the thickness of the connector 100 within the aforementioned range, the connector 100 can be made more compact while maintaining a certain structural strength, making it easier for the connector 100 to deform and fit more fully with the tab 500 and / or cover plate 400.

[0084] By setting the thickness of the light-transmitting element 200 within the aforementioned range, the light-transmitting element 200 can be made more compact while maintaining a certain structural strength, and the light-transmitting effect of the light-transmitting element 200 on laser light can be improved.

[0085] Based on the welding protection components described above, this application also proposes a battery, with reference to... Figure 6 As shown, it includes a housing 300, a cover plate 400, a lead-out member 410, a battery cell, and the welding protection assembly described above. This battery can be used in battery packs or in electrical appliances.

[0086] The casing 300 is the basic component of the battery in this application. The casing 300 can provide a mounting base for at least some of the other components of the battery and serves to protect them. The casing 300 can be made of metal, which gives it better structural strength, thereby improving its durability and reliability.

[0087] The housing 300 has a cavity, which is a hollow structure within the housing 300. The housing 300 also has a mounting port, which is an opening on the surface of the housing 300 and communicates with the mounting cavity. When manufacturing the battery of this application, other components of the battery can be mounted into the cavity of the housing 300 through the mounting port.

[0088] A cover plate 400 is disposed at the mounting opening to seal at least part of the mounting opening, thereby sealing the cavity. A lead-out member 410 is disposed at the cover plate 400.

[0089] The battery cell is housed within the cavity of the housing 300. The battery cell includes a tab 500, one end of which is connected to the core of the battery cell, and the other end of which can overlap with a lead-out piece 410 on the cover plate 400. The cover plate 400 has an overlapping surface, and the lead-out piece 410 is disposed on this surface. The tab 500 overlaps with the lead-out piece 410 on the cover plate 400. A connector 100 is disposed on the overlapping surface of the cover plate 400, such that a portion of the connector 100 is also disposed on the tab 500. The light-transmitting opening 111 of the connector 100 is opposite to the overlapping portion of the tab 500 and the lead-out piece 410. This allows the overlapping portion of the tab 500 and the lead-out piece 410 to be welded using laser welding, thereby ensuring a stable and reliable electrical connection between the tab 500 and the cover plate 400.

[0090] In some implementations, reference Figure 1 As shown, the light-transmitting element 200 of this application is located on the side of the connector 100 facing the cover plate 400. In this way, the connector 100 and the cover plate 400 can enclose the light-transmitting element 200 between the connector 100 and the cover plate 400, further preventing the light-transmitting element 200 from separating from the connector 100 and improving the connection stability between the light-transmitting element 200 and the connector 100.

[0091] Based on the welding protection components or batteries described above, this application also proposes an electrical device that includes the welding protection components or batteries described above.

[0092] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0093] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0094] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0095] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A welding protection assembly for covering the weld joint between a battery tab (500) and a lead-out (410) on a cover plate (400), characterized in that, The welding protection assembly includes: The connector (100) has a light-transmitting opening (111) that passes through the connector (100). The connector (100) is connected to the cover plate (400) and / or the electrode (500). At least part of the light-transmitting opening (111) is opposite to the welding joint of the electrode (500) and the lead-out member (410). A light-transmitting element (200) is disposed on the connector (100), and the light-transmitting element (200) covers the light-transmitting opening (111).

2. The welding protection assembly according to claim 1, characterized in that, The orthographic projection of the connector (100) on the preset plane is the first projection, and the orthographic projection of the light-transmitting component (200) on the preset plane is the second projection. The second projection is located within the first projection, and the preset plane is perpendicular to the orientation of the light-transmitting opening (111).

3. The welding protection assembly according to claim 2, characterized in that, The length of the first projection is greater than the length of the second projection, and the width of the first projection is greater than the width of the second projection.

4. The welding protection assembly according to claim 2, characterized in that, The orthographic projection of the light-transmitting opening (111) onto the preset plane is a third projection, and the area of ​​the third projection is smaller than the area of ​​the second projection.

5. The welding protection assembly according to claim 4, characterized in that, The length of the second projection is greater than the length of the third projection, and the width of the second projection is greater than the width of the third projection.

6. The welding protection assembly according to any one of claims 1-5, characterized in that, At least one corner (112) of the light-transmitting opening (111) is rounded.

7. The welding protection assembly according to any one of claims 1-5, characterized in that, The connector (100) includes a connecting body (110) and an adhesive layer (120). The light-transmitting opening (111) is opened on the connecting body (110). The adhesive layer (120) is stacked on the connecting body (110). The connector (100) is connected to the tab (500) and / or the cover plate (400) through the adhesive layer (120).

8. The welding protection assembly according to claim 7, characterized in that, The light-transmitting element (200) is stacked on the side of the adhesive layer (120) facing away from the connecting body (110), and the light-transmitting element (200) is bonded to the adhesive layer (120).

9. The welding protection assembly according to claim 7, characterized in that, The connector (100) is a flexible structural component.

10. The welding protection assembly according to claim 7, characterized in that, The connecting body (110) is made of polyolefin, polyester or polyether, and the adhesive layer (120) is made of polyacrylic acid, polyimide or polyvinylidene fluoride.

11. The welding protection assembly according to any one of claims 1-5, characterized in that, The material of the light-transmitting element (200) is calcium fluoride, quartz, sapphire, barium fluoride, zinc selenide or germanium.

12. The welding protection assembly according to any one of claims 1-5, characterized in that, The thickness of the connector (100) in the direction of the light-transmitting opening (111) is 0.01mm-2mm, and the thickness of the light-transmitting component (200) in the direction of the light-transmitting opening (111) is 0.05mm-5mm.

13. A battery, characterized in that, The device includes a housing (300), a cover plate (400), a lead-out member (410), a battery cell, and a welding protection assembly as described in any one of claims 1-12. The housing (300) has a cavity and a mounting port, the cavity being in communication with the mounting port, the battery cell being disposed within the cavity, the cover plate (400) sealing the mounting port, the lead-out member (410) being disposed on the cover plate (400), the battery cell including a tab (500), the tab (500) being welded to the lead-out member (410), the connector (100) being connected to the cover plate (400) and / or the tab (500), and at least a portion of the light-transmitting element (200) being opposite to the welded joint of the tab (500) and the lead-out member (410).

14. The battery according to claim 13, characterized in that, The connector (100) surrounds the weld between the tab (500) and the lead-out member (410).

15. The battery according to claim 13, characterized in that, The light-transmitting element (200) is located on the side of the connector (100) facing the cover plate (400).

16. An electrical appliance, characterized in that, It includes the welding protection component as described in any one of claims 1-12, or the battery as described in any one of claims 13-15.

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