Secondary battery processing technology, battery pack and electric equipment

Abstract

The invention discloses a processing technology of a secondary battery, a battery pack and electric equipment, and relates to the technical field of batteries, the secondary battery comprises a first battery cell, a second battery cell, an adapter plate and a top cover, the processing technology comprises the following steps: respectively welding the battery cell tabs on the first battery cell and the second battery cell to the corresponding adapter plates. The first battery cell and the second battery cell are arranged at an angle, and the included angle is smaller than 180 degrees. And maintaining the first battery cell and the second battery cell in a placement state through a jig. And welding the adapter plate on a corresponding pole on the top cover. The jig is dismounted, the top cover limits the first battery cell and the second battery cell, and the state that the included angle is smaller than 180 degrees is maintained. And combining and packaging the first battery cell and the second battery cell. According to the invention, the requirement on the height of the tab can be reduced, the purpose of reducing the height of the tab is achieved, and the use amount of the tab material is effectively reduced, so that the purpose of reducing the cost is achieved.

Description

Technical Field

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

[0002] Refer to 1 to Figure 7 , the existing secondary battery cells (such as square secondary battery cells) mostly have two bare cells, which can be called bare cell A and bare cell B; after the adapter and the bare cell pole ears are welded, and the adapter and the pole are welded, when the bare cell A and the bare cell B are flat at about 180° relative to the appearance of the top cover, there is no interference between the bare cell and the top cover, and there is no interference between the pole ears and the top cover; when the bare cell is a winding structure and is divided into a pole ear area and a pole ear area in the thickness direction, after the bare cell A and the bare cell B are combined, the bare cell A without pole ear area and the bare cell B without pole ear area are arranged opposite to each other.

[0003] However, for secondary batteries processed in the above manner, under the requirements of safe and reliable tab folding welding and core assembly, the lateral folding position of the bare cell tabs is offset and the folding height is too low, resulting in excessive tab height, which in turn leads to high cost of tab materials. Summary of the invention

[0004] The present application provides a secondary battery processing technology, a battery pack and an electrical device, which can reduce the requirement for the height of the pole tab, achieve the purpose of reducing the height of the pole tab, effectively reduce the amount of pole tab material used, and thus achieve the purpose of reducing costs.

[0005] In a first aspect, the present application provides a processing technology for a secondary battery, wherein the secondary battery comprises a first battery cell, a second battery cell, a switching sheet, and a top cover, and the processing technology comprises the following steps:

[0006] Step S100: welding the cell tabs on the first cell and the second cell to corresponding adapter sheets respectively.

[0007] During the specific welding process of the above steps, the first battery cell and the second battery cell need to be carefully inspected to ensure that the performance and appearance meet the standards. Then, the positive and negative ears on the first battery cell, as well as the positive and negative ears on the second battery cell, are welded to the corresponding adapters using precise welding technology. During the welding process, the firmness and conductivity of the welding points must be ensured to ensure the performance and safety of the battery pack. After welding is completed, the welding points need to be carefully inspected to ensure that there are no adverse phenomena such as cold welding, leaking welding or short circuit, so as to ensure that the welding quality meets the design requirements.

[0008] Step S200: Arrange the first battery cell and the second battery cell at an angle, and the angle is less than 180°.

[0009] In the above steps, the first battery cell and the second battery cell can be arranged at a specific angle as required, ensuring that the angle is less than 180 degrees. Through this carefully designed layout, the height of the tab can be effectively reduced. Specifically, the height of the tab can be reduced by about 20% to 40%. In turn, the amount of tab material used can be reduced, thereby reducing the manufacturing cost overall.

[0010] Step S300: maintaining the first battery cell and the second battery cell in a placed state by using a fixture.

[0011] At this stage, a specific jig can be used to ensure that the first battery cell and the second battery cell can be stably maintained in the predetermined placement state. In this way, the stability of subsequent welding operations can be significantly improved, ensuring the accuracy and reliability of the battery assembly process.

[0012] Step S400: welding the adapter to the corresponding pole on the top cover.

[0013] The above steps ensure that the adapter is ready and the corresponding pole position on the top cover is clear. Next, use appropriate welding tools and materials to accurately weld the adapter to the corresponding pole on the top cover. During the welding process, it is necessary to ensure that the connection between the adapter and the pole is firm and reliable, and also be careful not to cause unnecessary heat damage to other parts of the top cover.

[0014] Step S500: Remove the fixture, limit the first battery cell and the second battery cell with the top cover, and maintain the angle less than 180°. At least one of the first battery cell and the second battery cell cannot be adjusted to a state greater than or equal to 180° without being damaged.

[0015] In the above steps, the jig needs to be removed. After removing the jig, the top cover will limit the first battery cell and the second battery cell to ensure that the first battery cell and the second battery cell maintain a specific angle, and this angle is maintained at a state less than 180°. Through the above steps, the demand for the height of the pole ear can be reduced, and the purpose of reducing the height of the pole ear can be achieved. Specifically, the height of the pole ear needs to be reduced by about 20% to 40%. Through this reduction in height, the amount of pole ear material can be effectively reduced, thereby achieving the purpose of reducing costs. During this operation, at least one battery cell, whether it is the first battery cell or the second battery cell, cannot adjust the angle to a state greater than or equal to 180 degrees without causing damage due to the limitation of the top cover in the above structure. Therefore, the operator must be extremely careful when performing the limiting operation to avoid unnecessary damage to the battery cell.

[0016] Step S600: combining and packaging the first battery cell and the second battery cell.

[0017] The above steps can combine the first battery cell and the second battery cell, that is, combine the two battery cells tightly together. Then, the combined battery cells are packaged to ensure the structural stability and safety of the battery cells. This process is a key step in battery manufacturing, and it is necessary to accurately control the strength of the combination and the tightness of the packaging to ensure the performance and reliability of the final product.

[0018] In some examples, the first battery cell and the second battery cell are both of a rolled core structure or a laminated structure, including a pole ear portion and a main body portion, and the pole ear portion is a flexible structure formed by stacking a plurality of pole sheets.

[0019] This design allows the battery cells to maintain good flexibility and adaptability during the assembly process, which helps to improve the overall performance of the battery pack. The flexible structure of the pole ear not only enhances the connection reliability between the battery cells, but also alleviates the stress concentration caused by battery charging and discharging to a certain extent, extending the battery life. In addition, the compactness of the core structure optimizes the internal space layout of the battery pack, further improving the energy density and meeting the needs of modern electronic devices for high-energy, miniaturized battery packs.

[0020] In some examples, the end of the main body where the lug portion is disposed includes a lug region connected to the lug portion and a lug-free region not connected to the lug portion.

[0021] During the process of placing the first battery cell and the second battery cell at an angle, the pole lug area on the first battery cell is arranged adjacent to the pole lug area on the second battery cell, the pole lug area on the first battery cell is arranged opposite to the pole lug area on the second battery cell, and the two pole lug areas are arranged between the two pole lug areas.

[0022] Alternatively, when the first battery cell and the second battery cell are placed at an angle, the pole lug area on the first battery cell is arranged back to back with the pole lug area on the second battery cell, the pole lug area on the first battery cell is arranged adjacent to the pole lug area on the second battery cell, and the two pole lug areas are arranged between the two pole lug areas.

[0023] Alternatively, during the process of placing the first battery cell and the second battery cell at an angle, the non-polar lug area on the first battery cell is arranged adjacent to the polar lug area on the second battery cell, the polar lug area on the first battery cell is arranged back to back with the non-polar lug area on the second battery cell, and the two polar lug areas and the two non-polar lug areas are arranged alternately.

[0024] Alternatively, when the first battery cell and the second battery cell are placed at an angle, the non-polar lug area on the first battery cell is arranged back to back with the polar lug area on the second battery cell, the polar lug area on the first battery cell is arranged adjacent to the non-polar lug area on the second battery cell, and the two polar lug areas and the two non-polar lug areas are arranged alternately.

[0025] In the process of combining the first battery cell and the second battery cell, the pole ear portion is bent and at least partially covers the welding area on the pole ear area.

[0026] The above-mentioned layout design of the pole ear further optimizes the space utilization between the cells, so that during the core joining process, the pole ear can accurately cover the welding area to ensure the reliability and stability of welding. At the same time, the back-to-back arrangement of the non-pole ear area effectively avoids possible interference and damage during the cell joining process, improving the smoothness of the processing process and the yield rate.

[0027] In addition, the bare cell (first cell or second cell) has the tab-free area facing away from the adapter welding area, further enhancing the safety of the battery pack. This design reduces the risk of metal shavings falling into the bare cell during welding, thereby avoiding short circuits or internal damage that may be caused by metal shavings, extending the battery pack's service life, and improving its overall reliability.

[0028] In some examples, the folded position of the pole ear portion is set at the edge of the main body portion. Alternatively, the folded position of the pole ear portion is set at a position close to the center plane of the main body portion. Alternatively, the folded position of the pole ear portion is set at the middle position of the pole ear portion itself.

[0029] The above-mentioned flexible design of the folding position of the pole ear portion can adjust the layout of the pole ear portion in the main body according to actual needs. When the folding position of the pole ear portion is set at the edge of the main body, the internal space of the battery pack can be maximized, space waste can be reduced, and connection with other battery cells or components can be facilitated. When the folding position of the pole ear portion is set at a position close to the center plane of the main body, the weight distribution of the battery pack can be more effectively balanced and the stability of the overall structure can be improved. In addition, setting the folding position of the pole ear portion in the middle position of the pole ear portion itself can shorten the length of the pole ear portion to a certain extent, reduce material consumption, and maintain sufficient connection strength and electrical performance. These different designs of the folding position of the pole ear portion provide more choices and flexibility for the manufacture and application of battery packs to meet the needs of different scenarios.

[0030] In some examples, the first battery cell includes a first pole ear portion and a first main body portion, the second battery cell includes a second pole ear portion and a second main body portion, the first pole ear portion and the second pole ear portion are respectively welded to corresponding adapter plates, and the first main body portion and the second main body portion are arranged at an angle.

[0031] This cell layout design makes the battery pack more compact and flexible in structure. By arranging the first main body and the second main body at an angle, the internal space of the battery pack can be used more effectively and the space utilization rate can be improved. At the same time, this design also helps to optimize the heat dissipation performance of the battery pack, reduce heat accumulation, and extend the service life of the battery. In addition, the first pole ear part and the second pole ear part are respectively welded to the corresponding adapter, which ensures the stable connection between the battery cell and other parts of the battery pack, and improves the electrical performance and safety of the battery pack.

[0032] In some examples, after the first battery cell and the second battery cell are connected to the top cover, two sides of the top cover respectively limit the first main body and the second main body.

[0033] The above design not only optimizes the layout of the battery cells, but also further improves the overall performance of the battery pack. The stability and reliability of the battery cells in the battery pack are ensured by the limiting effect of the top cover on the first main body and the second main body. At the same time, this design significantly reduces the height of the tabs and reduces the amount of tab materials, thereby effectively controlling costs. The height is reduced by about 20% to 40%, and the specific reduction is selected according to actual needs. For example, it can be reduced by 25%, 30%, 35%, etc., so that the battery pack can maintain high performance while being more economical and practical. This innovative design idea has brought new breakthroughs to the manufacture and application of battery packs, and met the market demand for high-performance, low-cost battery packs.

[0034] In some examples, the angle between the first battery cell and the second battery cell is a, and 45°≤a≤175°. The above arrangement can place the first battery cell and the second battery cell in a "V" shape.

[0035] The above design enables the battery pack to flexibly adapt to the needs of different installation spaces and electrical equipment. By adjusting the angle between the battery cells, the volume and shape of the battery pack can be optimized to make it more compact and efficient. At the same time, this angle design also helps to improve the heat dissipation performance of the battery pack, ensuring that the battery cells can effectively dissipate heat during operation and extend the service life of the battery. In addition, the adjustment of the angle between the battery cells can also facilitate the maintenance and replacement of the battery pack, reducing the difficulty and cost of operation. The angle a is not limited to the above parameters, and can also be 30°, 50°, 60°, 75°, 90°, 125°, 135°, etc.

[0036] In some examples, both the first battery cell and the second battery cell are provided with an anode tab and a cathode tab, the adapter includes an anode adapter and a cathode adapter, the anode tabs are welded to the anode adapter, and the cathode tabs are welded to the cathode adapter.

[0037] The poles include an anode pole and a cathode pole. The anode pole is welded to the anode adapter plate, and the cathode pole is welded to the cathode adapter plate.

[0038] The above design not only ensures a stable connection between the battery cell and the pole, but also improves the overall electrical performance of the battery pack. The precise welding of the anode tab and the anode adapter, and the cathode tab and the cathode adapter, ensures the smooth transmission of current and reduces energy loss. At the same time, the welding connection between the anode pole and the anode adapter, and the cathode pole and the cathode adapter, further enhances the reliability and safety of the battery pack. This sophisticated connection method between the battery cell and the pole enables the battery pack to maintain excellent performance in various usage environments, providing stable and efficient energy support for electrical equipment.

[0039] In a second aspect, the present application provides a battery pack, including a secondary battery manufactured by the above-mentioned secondary battery processing technology and a box body, the box body having a receiving cavity, and at least one secondary battery is arranged in the receiving cavity.

[0040] The battery pack with the above secondary battery can reduce the overall cost. Specifically, the processing technology of the secondary battery in the present application can reduce the requirement for the height of the tab, thereby achieving the purpose of reducing the height of the tab. By reducing the height, the amount of tab material can be effectively reduced, thereby achieving the purpose of reducing costs.

[0041] In a third aspect, the present application provides an electrical device, including a secondary battery manufactured by the above-mentioned secondary battery processing technology and a shell, wherein the secondary battery is arranged in the shell.

[0042] The electrical equipment with the secondary battery can reduce the cost of the overall electrical equipment. Specifically, the processing technology of the secondary battery in the present application can reduce the requirement for the height of the tab, thereby achieving the purpose of reducing the height of the tab. By reducing the height, the amount of tab material can be effectively reduced, thereby achieving the purpose of reducing costs.

[0043] The design of the above-mentioned electrical equipment fully integrates the advantages of the above-mentioned secondary battery processing technology, and creates a safe and efficient operating environment for the secondary battery through the shell. The internal space of the shell is optimized according to the specific specifications of the secondary battery to ensure that the battery can be firmly embedded in it, effectively preventing performance degradation or safety hazards that may be caused by loose or misaligned batteries. In addition, the material selection of the shell has also been strictly considered. It not only has excellent strength and toughness, but also has good heat dissipation performance, which can promptly dissipate the heat generated during the operation of the battery, thereby ensuring the stable operation of the battery and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the examples or prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 Schematic diagram of the explosion structure of a secondary battery.

[0046] Figure 2 The figure is a schematic diagram of the structure of two battery cells of a secondary battery and a switching plate when they are welded in the prior art.

[0047] Figure 3 The present invention is a schematic cross-sectional view of the structure of two battery cells of a secondary battery and a switching plate when they are welded in the prior art.

[0048] Figure 4 It is a schematic diagram of the structure when the adapter plate of the secondary battery is welded to the pole on the top cover in the prior art.

[0049] Figure 5 It is a schematic cross-sectional view of the structure when the adapter plate of the secondary battery is welded to the pole on the top cover in the prior art.

[0050] Figure 6 It is a cross-sectional enlarged structural schematic diagram of the adapter plate of the secondary battery in the prior art when it is welded to the pole on the top cover.

[0051] Figure 7 It is a schematic cross-sectional view of the structure of a secondary battery in the prior art.

[0052] Figure 8 It is a schematic diagram of the process flow of a secondary battery manufacturing process in an example of the present application.

[0053] Fig. 9 It is a structural schematic diagram of two battery cells of a secondary battery and a switching plate when they are welded in one embodiment of the present application.

[0054] Fig.10 It is a schematic cross-sectional view of the structure of two battery cells of a secondary battery and a switching plate when they are welded in one embodiment of the present application.

[0055] Fig.11 It is a schematic diagram of the structure when the adapter plate of the secondary battery is welded to the pole on the top cover in one embodiment of the present application.

[0056] Fig.12 It is a schematic cross-sectional view of the structure when the adapter plate of the secondary battery is welded to the pole on the top cover in one embodiment of the present application.

[0057] Fig.13It is a schematic cross-sectional view of the structure of the interference between the battery cell and the top cover when the adapter of the secondary battery is welded to the upper pole of the top cover in one embodiment of the present application.

[0058] Fig.14 It is a schematic cross-sectional view of the structure of a secondary battery in one embodiment of the present application.

[0059] Reference numerals:

[0060] 100. winding core structure; 110. first battery cell; 120. second battery cell; 130. pole ear portion; 131. anode pole ear; 132. cathode pole ear; 140. main body portion; 141. pole ear area; 142. non-pole ear area; 200. adapter plate; 210. anode adapter plate; 220. cathode adapter plate; 300. top cover; 400. pole; 410. anode pole; 420. cathode pole. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0062] To solve the above technical problems, please refer to Figure 8-Figure 14 As shown, the first aspect of the present application proposes a processing technology for a secondary battery, which can reduce the requirement for the height of the tab, achieve the purpose of reducing the tab height H, and effectively reduce the amount of tab material used, thereby achieving the purpose of reducing costs.

[0063] Reference Figure 8 In some examples, the present application provides a processing technology for a secondary battery, the secondary battery comprising a first battery cell 110, a second battery cell 120, a transfer sheet 200 and a top cover 300, and the processing steps include:

[0064] Reference Fig. 9 and Fig.10 , step S100: welding the cell tabs on the first cell 110 and the second cell 120 to the corresponding adapter sheet 200 respectively.

[0065] During the specific welding process of the above steps, the first battery cell 110 and the second battery cell 120 need to be carefully inspected to ensure that the performance and appearance meet the standards. Next, the positive and negative ears on the first battery cell 110, as well as the positive and negative ears on the second battery cell 120, are welded to the corresponding adapter 200 by precise welding technology. During the welding process, the firmness and conductivity of the welding points must be ensured to ensure the performance and safety of the battery pack. After welding is completed, the welding points need to be carefully inspected to ensure that there are no defects such as cold welding, leaking welding or short circuit, so as to ensure that the welding quality meets the design requirements.

[0066] Reference Fig.11 and Fig.12 , step S200: setting the first battery cell 110 and the second battery cell 120 at an angle, and the angle is less than 180°.

[0067] In the above steps, the first battery cell 110 and the second battery cell 120 can be arranged at a specific angle as required, ensuring that the angle is less than 180 degrees. Through this carefully designed layout, the height of the tab can be effectively reduced. Specifically, the height of the tab can be reduced by about 20% to 40%. In turn, the amount of tab material used can be reduced, thereby reducing the manufacturing cost overall.

[0068] Reference Fig.13 , step S300: maintaining the first battery cell 110 and the second battery cell 120 in a placed state by a fixture.

[0069] At this stage, a specific jig can be used to ensure that the first battery cell 110 and the second battery cell 120 can be stably maintained in a predetermined placement state. In this way, the stability of subsequent welding operations can be significantly improved, ensuring the accuracy and reliability of the battery assembly process.

[0070] Step S400 : welding the adapter to the corresponding pole 400 on the top cover 300 .

[0071] The above steps can ensure that the adapter is ready and the position of the corresponding pole 400 on the top cover 300 is also clear. Then, use appropriate welding tools and materials to accurately weld the adapter to the corresponding pole 400 on the top cover 300. During the welding process, it is necessary to ensure that the connection between the adapter and the pole 400 is firm and reliable, and also be careful not to cause unnecessary thermal damage to other parts of the top cover 300.

[0072] Step S500: Remove the jig, and use the top cover 300 to limit the first battery cell 110 and the second battery cell 120, and maintain the angle less than 180°. At least one of the first battery cell and the second battery cell cannot be adjusted to a state greater than or equal to 180° without being damaged.

[0073] In the above steps, the jig needs to be removed. After removing the jig, the top cover 300 will limit the first battery cell 110 and the second battery cell 120 to ensure that the first battery cell 110 and the second battery cell 120 maintain a specific angle, which is maintained at a state less than 180°. Through the above steps, the demand for the height of the tab can be reduced, and the purpose of reducing the tab height H can be achieved. Specifically, the tab height H needs to be reduced by about 20% to 40%. Through this height reduction, the amount of tab material can be effectively reduced, thereby achieving the purpose of reducing costs. During this operation, at least one battery cell, whether it is the first battery cell or the second battery cell, cannot adjust the angle to a state greater than or equal to 180 degrees without causing damage due to the limitation of the top cover in the above structure. Therefore, the operator must be extremely careful when performing the limit operation to avoid unnecessary damage to the battery cell.

[0074] Step S600: combining and packaging the first battery cell 110 and the second battery cell 120 .

[0075] The above steps can combine the first battery cell 110 and the second battery cell 120, that is, combine the two battery cells tightly together. Then, the combined battery cells are packaged to ensure the structural stability and safety of the battery cells. This process is a key step in battery manufacturing, and it is necessary to accurately control the strength of the combination and the tightness of the packaging to ensure the performance and reliability of the final product.

[0076] In these steps, each step plays a crucial role in ensuring the efficient and safe manufacturing of secondary batteries. Step S100 realizes the electrical connection between the battery cell tab and the adapter plate by welding the battery cell tab to the adapter plate, providing a basis for the subsequent operation of the battery. Step S200 optimizes the internal space layout of the battery by adjusting the included angle between the first battery cell 110 and the second battery cell 120, which may contribute to improving the energy density or heat dissipation performance of the battery. Step S300 uses a jig to fix the battery cell, ensuring the stability and accuracy of the battery cell during the subsequent processing. Step S400 welds the adapter plate to the corresponding pole column 400 of the top cover 300, further completing the electrical connection of the battery and providing structural support for the protection and encapsulation of the battery. After removing the jig in step S500, the top cover 300 is used to limit the battery cell, maintaining the included angle state of the battery cell and ensuring the stability and reliability of the battery structure. Finally, in step S600, the battery cells are combined and encapsulated, completing the overall manufacturing process of the battery and providing safety guarantee for the use of the battery.

[0077] The above steps of this application can provide a processing technological process for secondary batteries (rechargeable batteries). Secondary batteries are usually used in electronic devices such as mobile phones, laptops, household appliances, automobiles, etc., and secondary batteries can be charged repeatedly. This processing technology includes multiple steps, aiming to assemble two battery cells and some other components into a complete battery. This process involves welding, positioning, fixing, and final encapsulation steps. The processing technology of the secondary battery in this application can reduce the requirement for the height of the tab, achieve the purpose of reducing the tab height H. Through this reduction in height, the amount of tab material can be effectively reduced, thereby achieving the purpose of cost reduction.

[0078] The above steps may further include:

[0079] Step S700: After encapsulation, perform performance tests on the battery, including detection of indicators such as voltage, capacity, and internal resistance, to ensure that the performance of the battery meets the design requirements.

[0080] Step S800: After the performance test is qualified, conduct an appearance inspection on the battery to ensure that there are no scratches, no contamination on the battery surface, and the markings are clear and complete.

[0081] Step S900: Finally, package the processed secondary battery, attach a product manual and a quality assurance card, and prepare for storage and sale.

[0082] In the whole processing technology, by precisely controlling the welding, placement, and encapsulation processes of the battery cells, the energy density and safety of the battery are effectively improved, and at the same time, the production cost is reduced, providing high-performance and cost-effective secondary battery products for the market.

[0083] In some examples, the first battery cell 110 and the second battery cell 120 are both a roll structure 100 or a laminate structure. The roll structure 100 includes a pole ear portion 130 and a main body portion 140 . The pole ear portion 130 is a flexible structure formed by stacking a plurality of pole sheets.

[0084] This design enables the battery cells to maintain good flexibility and adaptability during the assembly process, which helps to improve the overall performance of the battery pack. The flexible structure of the ear portion 130 not only enhances the connection reliability between the battery cells, but also alleviates the stress concentration caused by battery charging and discharging to a certain extent, thereby extending the battery life. In addition, the compactness of the core structure 100 optimizes the internal space layout of the battery pack, further improving the energy density and meeting the needs of modern electronic devices for high-energy, miniaturized battery packs.

[0085] Reference Fig.14 In some examples, the end of the main body 140 where the pole ear portion 130 is disposed includes a pole ear region 141 connected to the pole ear portion, and a pole ear-free region 142 not connected to the pole ear portion.

[0086] When the first battery cell 110 and the second battery cell 120 are placed at an angle, the pole lug area 141 on the first battery cell 110 is adjacent to the pole lug area 141 on the second battery cell 120, the pole lug area 142 on the first battery cell 110 is opposite to the pole lug area 142 on the second battery cell 120, and the two pole lug areas 141 are arranged between the two pole lug areas 142.

[0087] Alternatively, when the first battery cell 110 and the second battery cell 120 are placed at an angle, the pole lug area 141 on the first battery cell 110 is arranged back to back with the pole lug area 141 on the second battery cell 120, the pole lug-free area 142 on the first battery cell 110 is arranged adjacent to the pole lug-free area 142 on the second battery cell 120, and the two pole lug-free areas 142 are arranged between the two pole lug areas 141.

[0088] Alternatively, during the process of placing the first battery cell 110 and the second battery cell 120 at an angle, the non-polar lug area 142 on the first battery cell 110 is adjacent to the polar lug area 141 on the second battery cell 120, the polar lug area 141 on the first battery cell 110 and the non-polar lug area 142 on the second battery cell 120 are arranged back to back, and the two polar lug areas 141 and the two non-polar lug areas 142 are alternately arranged.

[0089] Alternatively, during the process of placing the first battery cell 110 and the second battery cell 120 at an angle, the non-polar lug area 142 on the first battery cell 110 and the polar lug area 141 on the second battery cell 120 are arranged back to back, the polar lug area 141 on the first battery cell 110 and the non-polar lug area 142 on the second battery cell 120 are arranged adjacent to each other, and the two polar lug areas 141 and the two non-polar lug areas 142 are arranged alternately.

[0090] During the process of combining the first battery cell 110 and the second battery cell 120 , the pole ear portion 130 is bent and at least partially covers the welding area on the pole ear region 141 .

[0091] The above structure lists four matching modes of the first battery cell 110 and the second battery cell 120 , which can be selected according to time requirements.

[0092] In practical applications, the appropriate cell matching method can be selected according to the arrangement of the cells, the size of the battery pack, and the current output requirements. For example, in situations where higher current output is required, the tab areas of two cells can be set adjacent to each other for better parallel connection and improved current output capacity. In situations where the volume of the battery pack needs to be reduced, the tab-free areas of two cells can be set adjacent to each other to reduce the gap between the cells and improve the compactness of the battery pack.

[0093] In addition, during the process of cell assembly, the bending design of the pole ear can not only ensure that the welding area is completely covered, but also increase the connection strength between the cells, improving the stability and safety of the battery pack. At the same time, the bent pole ear can also play a certain buffering role, reducing the risk of damage to the cell when it is impacted by external forces.

[0094] In summary, by rationally designing the matching mode of the battery cells and the bending structure of the tabs, the performance of the battery pack can be optimized to meet different application requirements.

[0095] Specifically, the layout design of the above-mentioned pole ear portion 130 further optimizes the space utilization between the battery cells, so that during the core joining process, the pole ear portion can accurately cover the welding area to ensure the reliability and stability of welding. At the same time, the back-to-back arrangement of the non-pole ear area 142 effectively avoids interference and damage that may occur during the battery cell joining process, thereby improving the smoothness of the processing process and the yield rate.

[0096] In addition, the arrangement of the tab-free area 142 of the bare cell (the first cell 110 or the second cell 120) facing away from the adapter welding area further enhances the safety performance of the battery pack. This design reduces the risk of metal shavings falling into the bare cell during welding, thereby avoiding short circuits or internal damage that may be caused by metal shavings, extending the service life of the battery pack, and improving its overall reliability.

[0097] In summary, the battery pack and its processing technology provided in this application, through sophisticated battery cell design and optimized processing steps, not only improve the performance of the battery pack, but also ensure its structural strength, electrical performance and safety, meeting the needs of modern electronic devices for high-performance and high-safety battery packs.

[0098] In some examples, the stowed position of the pole ear portion 130 is set at the edge of the main body portion 140. Alternatively, the stowed position of the pole ear portion 130 is set at a position close to the center plane of the main body portion 140. Alternatively, the stowed position of the pole ear portion 130 is set at the middle position of the pole ear portion 130 itself.

[0099] The above-mentioned flexible design of the folding position of the pole ear portion can adjust the layout of the pole ear portion in the main body 140 according to actual needs. When the folding position of the pole ear portion is set at the edge of the main body 140, the internal space of the battery pack can be maximized, space waste can be reduced, and it is convenient to connect with other battery cells or components. When the folding position of the pole ear portion is set at a position close to the center plane of the main body 140, the weight distribution of the battery pack can be more effectively balanced and the stability of the overall structure can be improved. In addition, setting the folding position of the pole ear portion in the middle position of the pole ear portion itself can shorten the length of the pole ear portion to a certain extent, reduce material consumption, and maintain sufficient connection strength and electrical performance. These different designs of the folding position of the pole ear portion provide more choices and flexibility for the manufacture and application of battery packs to meet the needs of different scenarios.

[0100] In some examples, the first battery cell 110 includes a first pole ear portion and a first main body portion, and the second battery cell 120 includes a second pole ear portion and a second main body portion, the first pole ear portion and the second pole ear portion are respectively welded to corresponding adapter plates, and the first main body portion and the second main body portion are arranged at an angle.

[0101] This cell layout design makes the battery pack more compact and flexible in structure. By arranging the first main body and the second main body at an angle, the internal space of the battery pack can be used more effectively and the space utilization rate can be improved. At the same time, this design also helps to optimize the heat dissipation performance of the battery pack, reduce heat accumulation, and extend the service life of the battery. In addition, the first pole ear part and the second pole ear part are respectively welded to the corresponding adapter, which ensures the stable connection between the battery cell and other parts of the battery pack, and improves the electrical performance and safety of the battery pack.

[0102] In some examples, after the first battery cell 110 and the second battery cell 120 are both connected to the top cover 300 , the first main body and the second main body are respectively limited on two sides of the top cover 300 .

[0103] The above design not only optimizes the layout of the battery cells, but also further improves the overall performance of the battery pack. The top cover 300 limits the first main body and the second main body, ensuring the stability and reliability of the battery cells in the battery pack. At the same time, this design significantly reduces the height of the tabs and reduces the amount of tab material, thereby effectively controlling costs. The height is reduced by about 20% to 40%, and the specific reduction is selected according to actual needs. For example, it can be reduced by 25%, 30%, 35%, etc., so that the battery pack can maintain high performance while being more economical and practical. This innovative design idea has brought new breakthroughs to the manufacture and application of battery packs, and met the market demand for high-performance, low-cost battery packs.

[0104] In some examples, the angle between the first battery cell 110 and the second battery cell 120 is a, and 45°≤a≤175°. The above arrangement can place the first battery cell 110 and the second battery cell 120 in a "V" shape.

[0105] The above design enables the battery pack to flexibly adapt to the needs of different installation spaces and electrical equipment. By adjusting the angle between the battery cells, the volume and shape of the battery pack can be optimized to make it more compact and efficient. At the same time, this angle design also helps to improve the heat dissipation performance of the battery pack, ensuring that the battery cells can effectively dissipate heat during operation and extend the service life of the battery. In addition, the adjustment of the angle between the battery cells can also facilitate the maintenance and replacement of the battery pack, reducing the difficulty and cost of operation. The angle a is not limited to the above parameters, and can also be 30°, 50°, 60°, 75°, 90°, 125°, 135°, etc.

[0106] In some examples, the first battery cell 110 and the second battery cell 120 are both provided with an anode tab 131 and a cathode tab 132 , the adapter plate includes an anode adapter plate 210 and a cathode adapter plate 220 , the anode tab 131 is welded to the anode adapter plate 210 , and the cathode tab 132 is welded to the cathode adapter plate 220 .

[0107] The pole 400 includes an anode pole 410 and a cathode pole 420 . The anode pole 410 is welded to the anode adapter plate 210 , and the cathode pole 420 is welded to the cathode adapter plate 220 .

[0108] The above design not only ensures a stable connection between the battery cell and the pole, but also improves the overall electrical performance of the battery pack. The precise welding of the anode tab 131 and the anode adapter 210, and the cathode tab 132 and the cathode adapter 220 ensures smooth current transmission and reduces energy loss. At the same time, the welding connection between the anode pole 410 and the anode adapter 210, and the cathode pole 420 and the cathode adapter 220 further enhances the reliability and safety of the battery pack. This sophisticated connection between the battery cell and the pole enables the battery pack to maintain excellent performance in various usage environments, providing stable and efficient energy support for electrical equipment.

[0109] The welding methods of the present application include but are not limited to ultrasonic welding, laser welding and other welding methods. These welding methods have their own advantages and are suitable for different processing scenarios. Ultrasonic welding uses the heat energy generated by high-frequency vibration to quickly melt the welding materials on the contact surface and tightly combine them. It is suitable for scenarios with high requirements for welding strength and wide material adaptability. Laser welding uses the high energy density of the laser beam to accurately control the heating and melting of the welding area, and can achieve high-precision welding operations. It is especially suitable for occasions with high requirements for welding accuracy and aesthetics. The welding method of the present application is flexible to choose, and the most suitable welding process can be selected according to specific needs and material characteristics to ensure the processing quality and electrical performance of the battery pack.

[0110] In a second aspect, the present application provides a battery pack, including a secondary battery manufactured by the above-mentioned secondary battery processing technology and a box body, the box body having a receiving cavity, and at least one secondary battery is arranged in the receiving cavity.

[0111] The battery pack with the above secondary battery can reduce the overall cost. Specifically, the processing technology of the secondary battery in the present application can reduce the requirement for the height of the tab, thereby achieving the purpose of reducing the tab height H. By reducing this height, the amount of tab material can be effectively reduced, thereby achieving the purpose of reducing costs.

[0112] The above design can not only optimize the internal structure of the battery pack, but also improve the overall strength and durability of the battery pack. The corresponding box can be made of high-strength, corrosion-resistant materials, which can effectively protect the internal secondary batteries from interference and damage from the external environment. At the same time, the design of the box also takes into account the heat dissipation performance. Through reasonable heat dissipation channels and heat dissipation materials, it ensures that the battery pack can effectively dissipate heat during operation to avoid overheating and affecting the performance and life of the battery. In addition, the battery pack is also easy to install and maintain, which is convenient for users to flexibly configure and operate according to actual conditions.

[0113] In a third aspect, the present application provides an electrical device, including a secondary battery manufactured by the above-mentioned secondary battery processing technology and a shell, wherein the secondary battery is arranged in the shell.

[0114] The electrical equipment with the secondary battery can reduce the cost of the overall electrical equipment. Specifically, the processing technology of the secondary battery in the present application can reduce the requirement for the height of the tab, thereby achieving the purpose of reducing the tab height H. By reducing this height, the amount of tab material can be effectively reduced, thereby achieving the purpose of reducing costs.

[0115] The design of the above-mentioned electrical equipment fully integrates the advantages of the above-mentioned secondary battery processing technology, and creates a safe and efficient operating environment for the secondary battery through the shell. The internal space of the shell is optimized according to the specific specifications of the secondary battery to ensure that the battery can be firmly embedded in it, effectively preventing performance degradation or safety hazards that may be caused by loose or misaligned batteries. In addition, the material selection of the shell has also been strictly considered. It not only has excellent strength and toughness, but also has good heat dissipation performance, which can promptly dissipate the heat generated during the operation of the battery, thereby ensuring the stable operation of the battery and extending its service life.

[0116] The design of this type of electrical equipment not only gives full play to the high performance advantages of secondary batteries, but also improves the overall reliability and durability through the comprehensive protection of the shell. Whether it is for electronic devices used in daily home use or for large-scale electrical equipment in the industrial field, this design can provide stable and lasting energy support to meet the needs of various complex application scenarios. At the same time, the electrical equipment is also easy to install and maintain, which brings great convenience to users.

[0117] The electrical equipment of the present application may include but is not limited to mobile phones, laptop computers, household appliances, cars, etc.

[0118] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0119] The above are only preferred examples of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A secondary battery processing technology, characterized in that: The secondary battery comprises a first battery cell, a second battery cell, a switching sheet and a top cover, and the processing steps comprise: Welding the cell tabs on the first cell and the second cell to the corresponding adapter sheets respectively; The first battery cell and the second battery cell are arranged at an angle, and the angle is less than 180°; Maintaining the first battery cell and the second battery cell in a placed state by using a jig; Welding the adapter to the corresponding pole on the top cover; The jig is removed, and the top cover limits the first battery cell and the second battery cell, and maintains a state where the angle is less than 180°; The first battery cell and the second battery cell are combined and packaged.

2. The processing technology of the secondary battery according to claim 1, characterized in that: The first battery cell and the second battery cell are both of a rolled core structure or a laminated structure, including a pole ear portion and a main body portion, and the pole ear portion is a flexible structure formed by stacking a plurality of pole sheets.

3. The processing technology of the secondary battery according to claim 2, characterized in that: The end of the main body where the pole ear portion is arranged includes a pole ear region connected to the pole ear portion and a pole ear-free region not connected to the pole ear portion; During the process of the first battery cell and the second battery cell being placed at an angle, the tab area on the first battery cell is arranged adjacent to the tab area on the second battery cell, the non-tab area on the first battery cell is arranged opposite to the non-tab area on the second battery cell, and the two tab areas are arranged between the two non-tab areas; Alternatively, during the process of the first battery cell and the second battery cell being placed at an angle, the tab area on the first battery cell is arranged opposite to the tab area on the second battery cell, the tab-free area on the first battery cell is arranged adjacent to the tab-free area on the second battery cell, and the two tab-free areas are arranged between the two tab areas; Alternatively, during the process of the first battery cell and the second battery cell being placed at an angle, the non-polar lug area on the first battery cell is arranged adjacent to the polar lug area on the second battery cell, the polar lug area on the first battery cell is arranged opposite to the non-polar lug area on the second battery cell, and the two polar lug areas and the two non-polar lug areas are arranged alternately; Alternatively, during the process of the first battery cell and the second battery cell being placed at an angle, the non-polar lug area on the first battery cell is arranged opposite to the polar lug area on the second battery cell, the polar lug area on the first battery cell is arranged adjacent to the non-polar lug area on the second battery cell, and the two polar lug areas and the two non-polar lug areas are arranged alternately; Wherein, during the process of combining the first battery cell and the second battery cell, the pole ear portion is bent and at least partially covers the welding area on the pole ear area.

4. The processing technology of the secondary battery according to claim 2, characterized in that: The folded position of the pole ear portion is set at the edge of the main body; or, the folded position of the pole ear portion is set at a position close to the center plane of the main body; or, the folded position of the pole ear portion is set at the middle position of the pole ear portion itself.

5. The processing technology of the secondary battery according to claim 1, characterized in that: The first battery cell includes a first pole ear portion and a first main body portion, the second battery cell includes a second pole ear portion and a second main body portion, the first pole ear portion and the second pole ear portion are respectively welded to the corresponding adapter sheet, and the first main body portion and the second main body portion are arranged at an angle.

6. The processing technology of the secondary battery according to claim 5, characterized in that: After the first battery cell and the second battery cell are both connected to the top cover, two sides of the top cover respectively limit the first main body and the second main body.

7. The processing technology for a secondary battery according to any one of claims 1 to 6, characterized in that: The angle between the first battery cell and the second battery cell is a, and 45°≤a≤175°.

8. The processing technology of a secondary battery according to any one of claims 1 to 6, characterized in that: The first battery cell and the second battery cell are both provided with an anode tab and a cathode tab, the adapter plate includes an anode adapter plate and a cathode adapter plate, the anode tab is welded to the anode adapter plate, and the cathode tab is welded to the cathode adapter plate; The poles include an anode pole and a cathode pole, the anode pole is welded to the anode adapter plate, and the cathode pole is welded to the cathode adapter plate.

9. A battery pack, characterized in that: include: A secondary battery manufactured by the processing process for a secondary battery according to any one of claims 1 to 8; and, The box body has a receiving cavity, and at least one secondary battery is arranged in the receiving cavity.

10. An electrical device, characterized in that: include: A secondary battery manufactured by the processing process for a secondary battery according to any one of claims 1 to 8; and, A housing is provided inside which the secondary battery is disposed.

Images