Cover body press-fitting device of single battery and battery production system

Abstract

The utility model provides a cover body press-fitting device of a battery monomer and a battery production system, and the cover body press-fitting device of the battery monomer comprises a clamping mechanism and a pressure head mechanism, the first cover body clamping block of at least one of the two first clamping assemblies close to each other in the first direction in the clamping mechanism is movably connected to the first support in the first direction, and the first elastic piece is clamped between the first cover body clamping block and the first support, so that the first cover body clamping block can float in the first direction relative to the first support; the first cover body clamping block can adapt to the cover body with the size fluctuating, stable clamping force can be applied to the cover body with the size fluctuating within a certain range, the cover body is not prone to being clamped too tightly or too loosely, the cover body can be stably pushed into the opening of the shell, the yield of pressing the cover body into the opening is increased, product scrapping is reduced, and the product quality is improved. And the production cost of the battery monomer is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a battery cell cover pressing device and a battery production system. Background Art

[0002] Battery devices have the advantages of high specific energy and high power density, and are widely used in electronic devices and transportation vehicles, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, and electric tools.

[0003] As the application fields of battery devices continue to expand, the market demand for battery devices is also increasing. How to improve the yield rate in the battery production process and reduce the production cost of battery devices has attracted more and more attention from technicians in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery cell cover pressing device and a battery production system. The battery cell cover pressing device can improve the yield rate of the battery cell and is conducive to reducing the production cost of the battery cell.

[0005] In a first aspect, some embodiments of the present application provide a battery cell cover press-fitting device, which includes a clamping mechanism and a pressing head mechanism, the clamping mechanism includes two first clamping components arranged opposite to each other along a first direction, the first clamping component includes a first support, a first cover clamp and a first shell clamp, the first cover clamp and the first shell clamp are both connected to the first support; the two first clamping components are configured to be able to approach each other along the first direction, so that the first cover clamps in the two first clamping components clamp the cover of the battery cell, and the first shell clamp clamps clamp the shell of the battery cell; the first cover clamp of at least one of the two first clamping components is movably connected to the first support along the first direction, and a first elastic member is clamped between the first cover clamp and the first support; the pressing head mechanism is used to push the cover into the opening of the shell along the direction of the opening, and the first direction is perpendicular to the direction of the opening.

[0006] In the above structure, since the first cover body clamp of at least one of the two first clamping assemblies that can approach each other along the first direction is movably connected to the first support along the first direction, and a first elastic member is clamped between the first support, the first cover body clamp can float in the first direction relative to the first support, so that the first cover body clamp can adapt to the cover body with size fluctuations, and can apply a stable clamping force to the cover body with size fluctuations within a certain range, and it is not easy to cause the clamping of the cover body to be too tight or too loose, so that the cover body can be stably pushed into the opening of the shell, thereby improving the yield rate of the cover body being pressed into the opening, reducing product scrapping, and helping to reduce the production cost of battery cells.

[0007] According to the battery cell cover pressing device provided in some embodiments of the present application, in the direction of the opening, the length of the first shell clamp is set to A, and the length of the shell is set to B, 1 / 3≤A / B≤2 / 3. This not only enables the first shell clamp to have a sufficiently long contact dimension with the shell in the direction of the opening, which is beneficial for the first shell clamp to keep the aluminum shell vertical and improve the positioning stability of the shell, but also reduces material waste caused by the excessive size of the first shell clamp.

[0008] According to the battery cell cover pressing device provided in some embodiments of the present application, along the first direction, the movable dimension of the first cover clamp is set to E, 1mm≤E≤3mm, so that the first cover clamp has a suitable floating distance in the first direction, so that the first cover clamp can adapt to the fluctuation of the incoming material size of the cover and apply a clamping force to the cover that is neither tight nor loose.

[0009] According to the battery cell cover press-fitting device provided in some embodiments of the present application, the shell includes two first walls arranged opposite to each other along a first direction and two second walls arranged opposite to each other along a second direction, the second direction is perpendicular to the direction of the opening and the first direction, and the second walls are connected between the two first walls; the first shell clamp extends to the connection between the first wall and the second wall. Since the connection between the first wall and the second wall has a large rigidity, the first shell clamp clamps the connection between the first wall and the second wall, which can reduce the deformation of the first wall and the second wall caused by the clamping of the first shell clamp, so that the first shell clamp can well position the shell.

[0010] According to the battery cell cover pressing device provided in some embodiments of the present application, at least two first shell clamps are connected to the first support, and the at least two first shell clamps are arranged along the second direction. The first shell clamps at both ends of the at least two first shell clamps in the second direction extend to the connection, so that the first shell clamps at both ends of the at least two first shell clamps in the second direction act on the connection with better rigidity, which can reduce the deformation of the first wall and the second wall caused by the clamping of the first shell clamps, so that the first shell clamps can well position the shell.

[0011] According to the battery cell cover press-fitting device provided in some embodiments of the present application, the Brinell hardness of the first shell clamp is set to be smaller than the Brinell hardness of the shell, so that the first shell clamp is not easy to cause knocks or scratches to the shell when it abuts against the shell, which is beneficial to improving the aesthetics of the battery cell.

[0012] According to the battery cell cover pressing device provided in some embodiments of the present application, the pressing head mechanism is supported at a position corresponding to the cover and the connection, and the first cover clamp is spaced apart from the connection, so that the first cover clamp is not easy to interfere with the pressing head mechanism, thereby reducing the possibility of collision between the pressing head mechanism and the first cover clamp.

[0013] According to the battery cell cover press-fitting device provided in some embodiments of the present application, a gap is formed between the first cover clamp and the first shell clamp in the direction of the opening, and the gap is used to accommodate the opening of the shell. Since the cover is easily enlarged during the process of being fitted into the shell, causing the shell at the opening to deform, the gap is provided to accommodate the opening of the shell, which can provide deformation space for the shell at the opening.

[0014] According to the battery cell cover pressing device provided in some embodiments of the present application, the thickness of the shell is set to H, and the size of the gap is set to D along the direction of the opening, 1.05H≤D≤1.2H. This not only allows the gap to have enough space to accommodate the deformation of the shell at the opening, but also makes it less likely that the gap will affect the opening of the shell when the cover is installed into the shell due to its excessive size.

[0015] According to the battery cell cover pressing device provided in some embodiments of the present application, the surface roughness of the surface where the first cover clamp contacts the cover is Ra, Ra≤0.8μm, so that the surface where the first cover clamp contacts the cover is smooth enough, which helps to reduce the possibility of debris being scraped on the first cover clamp when the cover is pressed into the opening of the shell, thereby reducing the possibility of debris falling into the battery cell, which helps to improve the quality of the battery cell.

[0016] According to the battery cell cover press-fitting device provided in some embodiments of the present application, the first support is provided with a first guide shaft, the first guide shaft extends along a first direction, and the first cover clamp is slidably connected to the first guide shaft. By extending the first guide shaft provided on the first support along the first direction and making the first cover clamp slidably connected to the first guide shaft, the first cover clamp can move along the first direction, so that the floating direction of the first cover clamp is more accurate.

[0017] According to the battery cell cover press-fitting device provided in some embodiments of the present application, a plurality of first guide shafts are provided, and the plurality of first guide shafts are spaced apart on the first support, so that the first cover clamp is not easily deflected during its movement.

[0018] According to the battery cell cover pressing device provided in some embodiments of the present application, the clamping mechanism also includes two second clamping components arranged relatively to each other along a second direction, the second clamping components include a second support, a second cover clamp block and a second shell clamp block, the second cover clamp block and the second shell clamp block are both connected to the second support; the two second clamping components are configured to be able to approach each other along the second direction, so that the second cover clamp blocks in the two second clamping components clamp the cover body, and the second shell clamp blocks clamp the shell body; the second cover clamp block of at least one of the two second clamping components is movably connected to the second support along the second direction, and a second elastic member is clamped between the second cover clamp block and the second support; the second direction is perpendicular to the direction of the opening and the first direction. By movably connecting the second cover body clamping block of at least one of the two second clamping assemblies to the second support along the second direction, at least one of the two second cover bodies can float in the second direction, so that the distance between the two second cover bodies can fluctuate with the size fluctuation of the clamped cover body, so that the clamping mechanism can adapt to the fluctuation of the size of the cover body in the second direction and can apply a stable clamping force to the cover body with size fluctuation within a certain range, and it is not easy to cause the cover body to be clamped too tightly or too loosely.

[0019] According to the battery cell cover press-fitting device provided in some embodiments of the present application, the clamping mechanism also includes a first driver and a second driver, the output end of the first driver is connected to the first support, and the output end of the second driver is connected to the second support.

[0020] In a second aspect, some embodiments of the present application provide a battery cell cover pressing device, which includes the battery cell cover pressing device provided by any of the above-mentioned technical solutions, and the battery cell cover pressing device is used to press the battery cell cover into the opening of the shell in the battery cell.

[0021] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects:

[0022] Some embodiments of the present application provide a battery cell cover press-fitting device, which includes a clamping mechanism and a pressing head mechanism, the clamping mechanism includes two first clamping components arranged relatively to each other along a first direction, the first clamping component includes a first support, a first cover clamp and a first shell clamp, the first cover clamp and the first shell clamp are both connected to the first support; the two first clamping components are configured to be able to approach each other along the first direction, so that the first cover clamps in the two first clamping components clamp the cover of the battery cell, and the first shell clamp clamps clamp the shell of the battery cell; the first cover clamp of at least one of the two first clamping components is movably connected to the first support along the first direction, and a first elastic member is clamped between the first cover clamp and the first support; the pressing head mechanism is used to push the cover into the opening of the shell along the direction of the opening, and the first direction is perpendicular to the direction of the opening.

[0023] In the above structure, since the first cover body clamp of at least one of the two first clamping assemblies that can approach each other along the first direction is movably connected to the first support along the first direction, and a first elastic member is clamped between the first support, the first cover body clamp can float in the first direction relative to the first support, so that the first cover body clamp can adapt to the cover body with size fluctuations, and can apply a stable clamping force to the cover body with size fluctuations within a certain range, and it is not easy to cause the clamping of the cover body to be too tight or too loose, so that the cover body can be stably pushed into the opening of the shell, thereby improving the yield rate of the cover body being pressed into the opening, reducing product scrapping, and helping to reduce the production cost of battery cells.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0026] Figure 1 A disassembled diagram of a battery cell provided in some embodiments of the present application;

[0027] Figure 2 A schematic diagram of the structure of a cover press-fitting device for a battery cell provided in some embodiments of the present application;

[0028] Figure 3 A schematic diagram of a clamping mechanism clamping a battery cell provided in some embodiments of the present application;

[0029] Figure 4 A partially disassembled schematic diagram of a first clamping assembly provided in some embodiments of the present application;

[0030] Figure 5 A schematic diagram of a housing of a battery cell provided in some embodiments of the present application;

[0031] Figure 6 A schematic diagram of a first clamping assembly clamping a battery cell provided in some embodiments of the present application;

[0032] Figure 7 for Figure 6 The enlarged view of F in the middle;

[0033] Figure 8 A partially disassembled schematic diagram of a second clamping assembly provided in some embodiments of the present application.

[0034] In the attached picture:

[0035] 1. Clamping mechanism; 11. First clamping assembly; 111. First support; 1111. First guide shaft; 1112. First elastic member; 112. First cover clamping block; 113. First housing clamping block;

[0036] 12, second clamping assembly; 121, second support; 1211, second guide shaft; 1212, second elastic member; 122, second cover clamping block; 123, second housing clamping block;

[0037] 13. Clearance;

[0038] 2. Press head mechanism;

[0039] 3. Battery cell; 31. Shell; 311. First wall; 312. Second wall; 313. Third wall; 32. Cover; 33. Connection;

[0040] X, first direction; Y, second direction; Z, direction of the opening. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0043] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0044] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0048] The battery apparatus mentioned in the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, which are connected in series, in parallel or in mixed connection through a busbar. As an example, the battery cell assembly may also be accommodated in a box by directly fixing a plurality of battery cells to the box.

[0049] A battery cell generally includes a housing and an electrode assembly contained in the housing. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), or a composite metal housing (such as a copper-aluminum composite housing). In some embodiments, the housing may be a sealed structure or a non-sealed structure.

[0050] In some embodiments, the housing includes a cover and a shell, the shell is provided with an opening, and the cover is provided to cover the opening. The shell may be provided with one or more openings. The cover may also be provided with one or more openings.

[0051] Usually, reference Figure 1 , the electrode assembly and other components of the battery cell 3 are installed in the shell through the opening of the shell 31. In the prior art, in order to form a sealed space structure of the shell, the cover 32 that matches the opening of the shell 31 is usually pressed into the opening of the shell 31 by a press-fitting device. However, due to the fluctuation of the size of the incoming cover 32, the cover 32 is easily deflected due to unstable force during the process of being pressed into the opening of the shell 31, making the battery cell 3 scrapped, which is not conducive to controlling the production cost of the battery cell 3.

[0052] In order to improve the yield rate of battery cells and reduce the production cost of battery cells, some embodiments of the present application provide a battery cell cover pressing device, which includes a clamping mechanism and a pressing head mechanism, the clamping mechanism includes two first clamping components arranged relatively to each other along a first direction, the first clamping component includes a first support, a first cover clamp and a first shell clamp, the first cover clamp and the first shell clamp are both connected to the first support; the two first clamping components are configured to be able to approach each other along the first direction, so that the first cover clamps in the two first clamping components clamp the cover of the battery cell, and the first shell clamp clamps the shell of the battery cell; the first cover clamp of at least one of the two first clamping components is movably connected to the first support along the first direction, and a first elastic member is clamped between the first cover clamp and the first support; the pressing head mechanism is used to push the cover into the opening of the shell along the direction of the opening. In the above structure, since the first cover body clamp of at least one of the two first clamping assemblies that can approach each other along the first direction is movably connected to the first support along the first direction, and a first elastic member is clamped between the first support, the first cover body clamp can float in the first direction relative to the first support, so that the first cover body clamp can adapt to the cover body with size fluctuations, and can apply a stable clamping force to the cover body with size fluctuations within a certain range, and it is not easy to cause the clamping of the cover body to be too tight or too loose, so that the cover body can be stably pushed into the opening of the shell, thereby improving the yield rate of the cover body being pressed into the opening, reducing product scrapping, and helping to reduce the production cost of battery cells.

[0053] The technical solutions of the battery cell cover pressing device and the battery production system provided in the specific implementation manner of the present application will be further described below in conjunction with the accompanying drawings.

[0054] The embodiment of the present application provides a battery cell cover press-fitting device, referring to Figure 2 The battery cell cover pressing device comprises a clamping mechanism 1 and a pressing head mechanism 2, referring to Figure 3The clamping mechanism 1 includes two first clamping assemblies 11 arranged opposite to each other along a first direction X, referring to Figure 4 The first clamping assembly 11 includes a first support 111, a first cover clamp 112 and a first shell clamp 113, and the first cover clamp 112 and the first shell clamp 113 are both connected to the first support 111; the two first clamping assemblies 11 are configured to be able to approach each other along the first direction X, so that the first cover clamp 112 in the two first clamping assemblies 11 clamp the cover 32 of the battery cell 3, and the first shell clamp 113 clamps the shell 31 of the battery cell 3; the first cover clamp 112 of at least one of the two first clamping assemblies 11 is movably connected to the first support 111 along the first direction X, and a first elastic member 1112 is sandwiched between the first cover clamp 112 and the first support 111; the pressing head mechanism 2 is used to push the cover 32 into the opening of the shell 31 along the direction Z of the opening, and the first direction X is perpendicular to the direction of the opening.

[0055] The clamping mechanism 1 may be a mechanism for clamping the housing 31 and the cover 32 of the battery cell 3 , and is used to keep the housing 31 and the cover 32 stable during the process of press-fitting the cover 32 into the opening of the housing 31 .

[0056] The first clamping assembly 11 may be an assembly for abutting against the housing 31 and the cover 32 of the battery cell 3 to clamp the housing 31 and the cover 32. By arranging two first clamping assemblies 11 relatively spaced apart in the first direction X, the two first clamping assemblies 11 can clamp the battery cell 3 located between the two first clamping assemblies 11.

[0057] The first support 111 may be a seat body component in the first clamping assembly 11, which may be used as a seat body component for setting other components in the first clamping assembly 11, and play a supporting or bearing role. The first cover body clamping block 112 may be a component in the first clamping assembly 11 used to abut against the cover body 32 to achieve clamping of the cover body 32. The first shell body clamping block 113 may be a component in the first clamping assembly 11 used to abut against the shell body 31 to achieve clamping of the shell body 31.

[0058] By connecting the first cover body clamp 112 and the first shell clamp 113 to the first support 111, the first support 111 can drive the first cover body clamp 112 and the first shell clamp 113 to move along the first direction X, so that the two first clamping assemblies 11 are configured to be able to approach each other along the first direction X, so that the first cover body clamp 112 in the two first clamping assemblies 11 can clamp the cover body 32 of the battery cell 3, and the first shell clamp 113 can clamp the shell 31 of the battery cell 3, so that the shell 31 and the cover body 32 remain aligned, which is convenient for subsequent installation.

[0059] The first cover body clamp 112 of at least one of the two first clamping assemblies 11 is movably connected to the first support 111 along the first direction X, which may mean that the first cover body clamp 112 of one of the two first clamping assemblies 11 is movably connected to the first support 111 along the first direction X, and the first cover body clamp 112 of the other one is fixedly connected to the first support 111; it may also mean that the first cover body clamp 112 of both first clamping assemblies 11 are movably connected to the first support 111 along the first direction X.

[0060] The first elastic member 1112 may be a component capable of elastic deformation. By sandwiching the first elastic member 1112 between the first cover clamping block 112 movably connected to the first support 111 along the first direction X and the first support 111, the first elastic member 1112 can use its own elastic restoring force to drive the first cover clamping block 112 to move along the first direction X.

[0061] Exemplarily, the first elastic member 1112 may be a spring extending along the first direction X. The spring may be configured to withstand a maximum pressure of 3.7 kg within an elastic limit, so that the first elastic member 1112 can provide a stable and sufficient clamping force for the first cover clamping block 112 .

[0062] By movably connecting the first cover body clamping block 112 of at least one of the two first clamping assemblies 11 to the first support 111 along the first direction X, at least one of the two first cover bodies 32 can float in the first direction X, so that the distance between the two first cover bodies 32 can fluctuate with the size fluctuation of the clamped cover body 32, so that the clamping mechanism 1 can adapt to the fluctuation of the size of the cover body 32 in the first direction X and can apply a stable clamping force to the cover body 32 with size fluctuation within a certain range, and it is not easy to cause the cover body 32 to be clamped too tight or too loose.

[0063] The pressing head mechanism 2 may be a mechanism for pushing the cover 32 into the opening of the shell 31. By arranging the first direction X perpendicularly to the direction Z of the opening, the clamping mechanism 1 clamping the battery cell 3 along the first direction X is unlikely to interfere with the pressing head mechanism 2 pushing the cover 32 into the opening of the shell 31.

[0064] In the above structure, since the first cover body clamp 112 of at least one of the two first clamping assemblies 11 that can approach each other along the first direction X is movably connected to the first support 111 along the first direction X, and a first elastic member 1112 is sandwiched between the first support 111, the first cover body clamp 112 can float in the first direction X relative to the first support 111, so that the first cover body clamp 112 can adapt to the cover body 32 with size fluctuations, and can apply a stable clamping force to the cover body 32 with size fluctuations within a certain range, and it is not easy to cause the clamping of the cover body 32 to be too tight or too loose, so that the cover body 32 can be stably pushed into the opening of the shell 31, thereby improving the yield rate of the cover body 32 being pressed into the opening, reducing product scrapping, and helping to reduce the production cost of the battery cell 3.

[0065] In some embodiments, in the direction Z of the opening, the length of the first shell clamp 113 is set to A, the length of the shell 31 is set to B, and 1 / 3≤A / B≤1 / 2.

[0066] By setting the length of the first shell clamp 113 in the opening direction Z to A, the length of the shell 31 in the opening direction Z to B, and setting the relationship between the two to 1 / 3≤A / B≤2 / 3, not only can the first shell clamp 113 have a sufficiently long contact dimension with the shell 31 in the opening direction Z, which is beneficial for the first shell clamp 113 to maintain the aluminum shell vertically and improve the positioning stability of the shell 31, but also reduces the material waste caused by the excessive size of the first shell clamp 113.

[0067] The relationship between the length A of the first shell clamp 113 in the opening direction Z and the length B of the shell 31 in the opening direction Z is set to 1 / 3≤A / B≤1 / 2. Exemplarily, A / B can be set to 1 / 3 or 1 / 2, so that the first shell clamp 113 can have a sufficiently long contact dimension with the shell 31 in the opening direction Z while reducing material waste caused by the excessive size of the first shell clamp 113.

[0068] In some embodiments, along the first direction X, the movable dimension of the first cover clamping block 112 is set to E, 1 mm ≤ E ≤ 3 mm.

[0069] By setting the range of the movable dimension E of the first cover body clamp 112 along the first direction X to 1mm≤E≤3mm, the first cover body clamp 112 has a suitable floating distance in the first direction X, so that the first cover body clamp 112 can adapt to the size fluctuation of the incoming material of the cover body 32 and apply a clamping force that is neither tight nor loose to the cover body 32.

[0070] The movable dimension E of the first cover body clamp 112 along the first direction X can be set to 1mm, 2mm or 3mm, so that the first cover body clamp 112 has a suitable floating distance in the first direction X, so that the first cover body clamp 112 can adapt to the size fluctuation of the incoming material of the cover body 32 and apply a clamping force that is neither tight nor loose to the cover body 32.

[0071] In some embodiments, reference Figure 5 The shell 31 includes two first walls 311 arranged opposite to each other along a first direction X and two second walls 312 arranged opposite to each other along a second direction Y. The second direction Y is perpendicular to the direction Z of the opening and the first direction X. The second wall 312 is connected between the two first walls 311. The first shell clamp 113 extends to the connection 33 between the first wall 311 and the second wall 312.

[0072] The first wall 311 and the second wall 312 are two wall structures connected to each other in the housing 31. The first wall 311 is provided with two walls arranged opposite to each other along the first direction X, and the second wall 312 is provided with two walls arranged opposite to each other along the first direction X. By connecting the two second walls 312 between the two first walls 311, the first wall 311 and the second wall 312 form a peripheral wall structure of the housing 31. By arranging the second direction Y perpendicularly to the opening direction Z and the first direction X, the second direction Y, the opening direction Z and the first direction X are perpendicular to each other, so that the battery cell cover pressing device and the battery cell 3 are arranged conveniently.

[0073] The first housing clamp 113 extends to the connection 33 between the first wall 311 and the second wall 312. The first housing clamp 113 can be pressed against the connection 33 between the first wall 311 and the second wall 312, and can apply a force to the connection 33 between the first wall 311 and the second wall 312. Since the connection 33 between the first wall 311 and the second wall 312 has a large rigidity, the first housing clamp 113 clamps the connection 33 between the first wall 311 and the second wall 312, which can reduce the deformation of the first wall 311 and the second wall 312 caused by the clamping of the first housing clamp 113, so that the first housing clamp 113 can well position the housing 31.

[0074] Exemplarily, the shell 31 further includes a third wall 313 , the first wall 311 and the second wall 312 are arranged around the outer periphery of the third wall 313 , and the third wall 313 is arranged opposite to the opening along the direction Z of the opening.

[0075] In some embodiments, at least two first shell clamps 113 are connected to the first support 111 , and the at least two first shell clamps 113 are arranged along the second direction Y. The first shell clamp 113 at the end of the at least two first shell clamps 113 in the second direction Y extends to the connection point 33 .

[0076] At least two first shell clamps 113 are connected to the first support 111 , which may mean that two, three or more first shell clamps 113 are connected to the first support 111 , so that the first shell clamps 113 can firmly clamp the shell 31 .

[0077] By arranging at least two first shell clamping blocks 113 at equal intervals along the second direction Y, the at least two first shell clamping blocks 113 can evenly apply force to the shell 31 , which helps to improve the stability of the shell 31 being clamped.

[0078] By extending the first shell clamps 113 at both ends of the second direction Y among the at least two first shell clamps 113 to the connection 33, the first shell clamps 113 at both ends of the second direction Y among the at least two first shell clamps 113 act on the connection 33 with better rigidity, thereby reducing the deformation of the first wall 311 and the second wall 312 caused by the clamping of the first shell clamps 113, so that the first shell clamps 113 can well position the shell 31.

[0079] Preferably, two first shell clamps 113 spaced apart along the second direction Y are connected to the first support 111 , and the two first shell clamps 113 act on the connection 33 to reduce the deformation of the shell 31 , so that the first shell clamps 113 can well position the shell 31 .

[0080] In some embodiments, the Brinell hardness of the first housing clamp 113 is set to be smaller than the Brinell hardness of the housing 31 .

[0081] By setting the Brinell hardness of the first shell clamp 113 to be smaller than the Brinell hardness of the shell 31 , the first shell clamp 113 is less likely to cause scratches or dents to the shell 31 when abutting against the shell 31 , which is beneficial to improving the aesthetics of the battery cell 3 .

[0082] Exemplarily, the Brinell hardness of the first shell clamp 113 and the Brinell hardness of the shell 31 can be measured according to the national standard GB / T 231-2002. The specific measurement method can refer to the national standard GB / T 231-2002 and will not be repeated here.

[0083] In some embodiments, the outer shell of the battery cell 3 is an aluminum shell, the first shell clamp 113 is a polyetheretherketone structure, and the first cover clamp 112 is a stainless steel structure.

[0084] In some embodiments, the pressing head mechanism 2 is pressed against a position corresponding to the cover 32 and the connection 33 , and the first cover clamping block 112 is spaced apart from the connection 33 .

[0085] By holding the pressing head mechanism 2 against the corresponding position of the cover body 32 and the connection 33, when the cover body 32 is pressed into the opening, the force-bearing part of the cover body 32 contacts the connection 33, which is beneficial to reducing the possibility of deformation of the shell 31 caused by the cover body 32.

[0086] By arranging the first cover body clamping block 112 and the connection portion 33 at a distance, the first cover body clamping block 112 is not likely to interfere with the pressing head mechanism 2 , thereby reducing the possibility of collision between the pressing head mechanism 2 and the first cover body clamping block 112 .

[0087] Exemplarily, the outer surface of the connection 33 is provided with rounded corners, so that the first wall 311 and the second wall 312 can be smoothly transitioned, thereby reducing the possibility of the battery cell 3 scratching external devices.

[0088] In some embodiments, reference Figure 6 and Figure 7 In the direction Z of the opening, a gap 13 is formed between the first cover clamping block 112 and the first shell clamping block 113 , and the gap 13 is used to accommodate the opening of the shell 31 .

[0089] The gap 13 may be a gap 13 formed by the first cover body clamp 112 and the first shell body clamp 113 in the direction Z of the opening, and is used to accommodate the opening of the shell 31. Since the cover body 32 is easy to expand the opening during the process of being fitted into the shell 31, causing the shell 31 at the opening to deform, the gap 13 is provided to accommodate the opening of the shell 31, which can provide deformation space for the shell 31 at the opening.

[0090] In some embodiments, the thickness of the shell 31 is set to H, and along the direction Z of the opening, the size of the gap 13 is set to D, and 1.05H≤D≤1.2H.

[0091] By setting the thickness of the shell 31 to H, setting the dimension of the gap 13 along the opening direction Z to D, and setting the relationship between the two to 1.05H≤D≤1.2H, not only is there enough space for the gap 13 to accommodate the deformation of the shell 31 at the opening, but it is also less likely for the gap 13 to be too large to affect the insertion of the cover 32 into the opening of the shell 31.

[0092] In some embodiments, the relationship between the thickness H of the shell 31 and the dimension D of the gap 13 along the opening direction Z can be set to D=1.05H, D=1.1H or D=1.2H, so that the gap 13 has sufficient space to accommodate the deformation of the shell 31 at the opening while not easily affecting the opening of the cover 32 to be installed into the shell 31.

[0093] In some embodiments, the surface roughness of the first cover clamp 112 contacting the cover 32 is Ra, and Ra≤0.8 μm.

[0094] By setting the range of the surface roughness Ra of the surface where the first cover body clamp 112 contacts the cover body 32 to Ra≤0.8μm, the surface where the first cover body clamp 112 contacts the cover body 32 is sufficiently smooth, which helps to reduce the possibility of debris being scratched on the first cover body clamp 112 when the cover body 32 is pressed into the opening of the shell 31, thereby reducing the possibility of debris falling into the battery cell 3, which helps to improve the quality of the battery cell 3.

[0095] In some embodiments, the first support 111 is provided with a first guide shaft 1111 , the first guide shaft 1111 extends along the first direction X, and the first cover clamping block 112 is slidably connected to the first guide shaft 1111 .

[0096] The first guide shaft 1111 may be a shaft-like component for guiding the movement of the first cover body clamping block 112. By extending the first guide shaft 1111 provided on the first support 111 along the first direction X and making the first cover body clamping block 112 slidably connected to the first guide shaft 1111, the first cover body clamping block 112 can move along the first direction X, so that the floating direction of the first cover body clamping block 112 is more accurate.

[0097] In some embodiments, a plurality of first guide shafts 1111 are provided, and the plurality of first guide shafts 1111 are spaced apart from each other on the first support 111 .

[0098] By arranging a plurality of first guide shafts 1111 at intervals on the first support 111 , the first cover clamping block 112 is slidably connected to the plurality of first guide shafts 1111 , so that the first cover clamping block 112 is not prone to deflection during movement.

[0099] In some embodiments, the clamping mechanism 1 further includes two second clamping assemblies 12 arranged opposite to each other along the second direction Y. Figure 8 The second clamping assembly 12 includes a second support 121, a second cover body clamp block 122 and a second shell body clamp block 123, and the second cover body clamp block 122 and the second shell body clamp block 123 are both connected to the second support 121; the two second clamping assemblies 12 are configured to be able to approach each other along the second direction Y, so that the second cover body clamp block 122 in the two second clamping assemblies 12 clamps the cover body 32, and the second shell body clamp block 123 clamps the shell 31; the second cover body clamp block 122 of at least one of the two second clamping assemblies 12 is movably connected to the second support 121 along the second direction Y, and a second elastic member 1212 is clamped between the second cover body clamp block 122 and the second support 121; the second direction Y is perpendicular to the direction Z of the opening and the first direction X.

[0100] The second support 121 may be a seat body component in the second clamping assembly 12, which may be used as a seat body component for setting other components in the second clamping assembly 12, and play a supporting or bearing role. The second cover body clamping block 122 may be a component in the second clamping assembly 12 used to abut against the cover body 32 to achieve clamping of the cover body 32. The second shell body clamping block 123 may be a component in the second clamping assembly 12 used to abut against the shell body 31 to achieve clamping of the shell body 31.

[0101] By connecting both the second cover body clamp 122 and the second shell clamp 123 to the second support 121, the second support 121 can drive the second cover body clamp 122 and the second shell clamp 123 to move along the second direction Y, so that the two second clamping assemblies 12 are configured to be able to approach each other along the second direction Y, so that the second cover body clamp 122 in the two second clamping assemblies 12 can clamp the cover body 32 of the battery cell 3, and the second shell clamp 123 can clamp the shell 31 of the battery cell 3, thereby making the cover body 32 clamped by both the first cover body clamp 112 and the second cover body clamp 122, and making the shell 31 clamped by both the first shell clamp 113 and the second shell clamp 123, thereby improving the stability of the position of the shell 31 and the cover body 32, and making the shell 31 and the cover body 32 stably installed.

[0102] The second cover body clamp block 122 of at least one of the two shell body 31 and cover body 32 clamping assemblies is movably connected to the second support 121 along the second direction Y. It can mean that the second cover body clamp block 122 of one of the two second clamping assemblies 12 is movably connected to the second support 121 along the second direction Y, and the second cover body clamp block 122 of the other one is fixedly connected to the second support 121; it can also be that the second cover body clamp blocks 122 of both second clamping assemblies 12 are movably connected to the second support 121 along the second direction Y.

[0103] The second elastic member 1212 may be a component that can be elastically deformed. By sandwiching the second elastic member 1212 between the second cover clamping block 122 movably connected to the second support 121 along the second direction Y and the second support 121, the second elastic member 1212 can use its own elastic restoring force to drive the second cover clamping block 122 to move along the second direction Y.

[0104] Exemplarily, the second elastic member 1212 may be a spring extending along the second direction Y. The spring may be configured to withstand a maximum pressure of 3.7 kg within an elastic limit, so that the second elastic member 1212 can provide a stable and sufficient clamping force for the second cover clamping block 122 .

[0105] By movably connecting the second cover body clamp 122 of at least one of the two second clamping assemblies 12 to the second support 121 along the second direction Y, at least one of the two second cover bodies 32 can float in the second direction Y, so that the distance between the two second cover bodies 32 can fluctuate with the size fluctuation of the clamped cover body 32, so that the clamping mechanism 1 can adapt to the fluctuation of the size of the cover body 32 in the second direction Y and can apply a stable clamping force to the cover body 32 with size fluctuation within a certain range, and it is not easy to cause the cover body 32 to be clamped too tightly or too loosely.

[0106] The second housing clamping block 123 may be pressed against the second wall 312 to clamp the cover 32 .

[0107] In some embodiments, the clamping mechanism 1 further includes a first driver and a second driver, wherein the output end of the first driver is connected to the first support 111 , and the output end of the second driver is connected to the second support 121 .

[0108] The first driver may be a driver for driving the first clamping assembly 11 to move along the first direction X. Under the action of the first driver, the two first clamping assemblies 11 can move closer to each other along the first direction X to clamp the battery cell 3, and can also move away from each other along the first direction X to release the battery cell 3.

[0109] The second driver can be a driver for driving the second clamping assembly 12 to move along the second direction Y. Under the action of the second driver, the two second clamping assemblies 12 can move closer to each other along the second direction Y to clamp the battery cell 3, and can also move away from each other along the second direction Y to release the battery cell 3.

[0110] Some embodiments of the present application also provide a battery production system, which includes a battery cell cover pressing device provided by any of the above technical solutions, and the battery cell cover pressing device is used to press the cover 32 of the battery cell 3 into the opening of the shell 31 in the battery cell 3.

[0111] The embodiment of the present application provides a battery cell cover pressing device, which includes a clamping mechanism 1 and a pressing head mechanism 2, wherein the pressing head mechanism 2 is used to push the cover 32 into the opening of the shell 31 along the opening direction Z. The clamping mechanism 1 includes two first clamping assemblies 11 arranged opposite to each other along a first direction X and two second clamping assemblies 12 arranged opposite to each other along a second direction Y. The two first clamping assemblies 11 are configured to be able to approach each other along the first direction X, so that the first cover clamping blocks 112 in the two first clamping assemblies 11 clamp the cover 32 of the battery cell 3, and the first shell clamping blocks 113 clamp the shell 31 of the battery cell 3. The two second clamping assemblies 12 are configured to be able to approach each other along the second direction Y, so that the second cover clamping blocks 122 in the two second clamping assemblies 12 clamp the cover 32 of the battery cell 3, and the second shell clamping blocks 123 clamp the shell 31 of the battery cell 3. The first cover clamping block 112 of at least one of the two first clamping assemblies 11 is movably connected to the first support 111 along the first direction X, and a first elastic member 1112 is sandwiched between the first cover clamping block 112 and the first support 111. The second cover clamping block 122 of at least one of the two second clamping assemblies 12 is movably connected to the second support 121 along the second direction Y, and a second elastic member 1212 is sandwiched between the second cover clamping block 122 and the second support 121.

[0112] In the above structure, since the first cover body clamp 112 of at least one of the two first clamping assemblies 11 that can approach each other along the first direction X is movably connected to the first support 111 along the first direction X, and a first elastic member 1112 is sandwiched between the first support 111, the first cover body clamp 112 can float in the first direction X relative to the first support 111, so that the first cover body clamp 112 can adapt to the cover body 32 with size fluctuations, and can apply a stable clamping force to the cover body 32 with size fluctuations within a certain range, and it is not easy to cause the clamping of the cover body 32 to be too tight or too loose, so that the cover body 32 can be stably pushed into the opening of the shell 31, thereby improving the yield rate of the cover body 32 being pressed into the opening, reducing product scrapping, and helping to reduce the production cost of the battery cell 3.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell cover press-fitting device, characterized in that: include: The clamping mechanism comprises two first clamping assemblies arranged opposite to each other along a first direction, the first clamping assemblies comprising a first support, a first cover clamping block and a first shell clamping block, the first cover clamping block and the first shell clamping block are both connected to the first support; the two first clamping assemblies are configured to be able to approach each other along the first direction, so that the first cover clamping blocks in the two first clamping assemblies clamp the cover of the battery cell, and the first shell clamping blocks clamp the shell of the battery cell; the first cover clamping block of at least one of the two first clamping assemblies is movably connected to the first support along the first direction, and a first elastic member is sandwiched between the first cover clamping block and the first support; The pressure head mechanism is used to push the cover body into the opening of the shell, and the first direction is perpendicular to the direction of the opening.

2. The battery cell cover press-fitting device according to claim 1, characterized in that: In the direction of the opening, the length of the first shell clamp is set to A, the length of the shell is set to B, and 1 / 3≤A / B≤2 / 3.

3. The battery cell cover press-fitting device according to claim 1, characterized in that: Along the first direction, the movable dimension of the first cover clamping block is set to E, 1mm≤E≤3mm.

4. The battery cell cover press-fitting device according to claim 1, characterized in that: The shell includes two first walls arranged opposite to each other along the first direction and two second walls arranged opposite to each other along the second direction, the second direction is perpendicular to the direction of the opening and the first direction, and the second wall is connected between the two first walls; the first shell clamp extends to the connection between the first wall and the second wall.

5. The battery cell cover press-fitting device according to claim 4, characterized in that: At least two of the first shell clamps are connected to the first support, and the at least two of the first shell clamps are arranged along the second direction. The first shell clamps at both ends of the at least two first shell clamps in the second direction extend to the connection point.

6. The battery cell cover press-fitting device according to claim 4, characterized in that: The Brinell hardness of the first housing clamp is set to be smaller than the Brinell hardness of the housing.

7. The battery cell cover press-fitting device according to claim 4, characterized in that: The pressing head mechanism is pressed against a position corresponding to the cover body and the connection point, and the first cover body clamping block is spaced apart from the connection point.

8. The battery cell cover press-fitting device according to claim 1, characterized in that: In the direction of the opening, a gap is formed between the first cover clamping block and the first shell clamping block, and the gap is used to accommodate the opening of the shell.

9. The battery cell cover press-fitting device according to claim 8, characterized in that: The thickness of the shell is set to H, and along the direction of the opening, the size of the gap is set to D, 1.05H≤D≤1.2H.

10. The battery cell cover press-fitting device according to claim 1, characterized in that: The surface roughness of the surface of the first cover body clamping block in contact with the cover body is Ra, and Ra≤0.8 μm.

11. The battery cell cover press-fitting device according to claim 1, characterized in that: The first support is provided with a first guide shaft, the first guide shaft extends along the first direction, and the first cover clamping block is slidably connected to the first guide shaft.

12. The battery cell cover press-fitting device according to claim 11, characterized in that: A plurality of the first guide shafts are provided, and the plurality of the first guide shafts are arranged at intervals on the first support.

13. The battery cell cover press-fitting device according to claim 1, characterized in that: The clamping mechanism also includes two second clamping assemblies arranged relatively to each other along a second direction, the second clamping assemblies including a second support, a second cover body clamp block and a second shell body clamp block, the second cover body clamp block and the second shell body clamp block are both connected to the second support; the two second clamping assemblies are configured to be able to approach each other along the second direction, so that the second cover body clamp blocks in the two second clamping assemblies clamp the cover body, and the second shell body clamp blocks clamp the shell; the second cover body clamp block of at least one of the two second clamping assemblies is movably connected to the second support along the second direction, and a second elastic member is clamped between the second cover body clamp block and the second support; the second direction is perpendicular to the direction of the opening and the first direction.

14. The battery cell cover press-fitting device according to claim 13, characterized in that: The clamping mechanism further includes a first driver and a second driver, wherein an output end of the first driver is connected to the first support, and an output end of the second driver is connected to the second support.

15. A battery production system, characterized in that: The invention comprises a battery cell cover pressing device as claimed in any one of claims 1 to 14, wherein the battery cell cover pressing device is used to press the battery cell cover into the opening of the shell of the battery cell.

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