Tab clip type battery cell

Abstract

The utility model relates to the technical field of batteries, in particular to a tab clamp type battery cell which comprises a cover plate, a pole and a connecting component, the pole is mounted on the cover plate, and a mounting groove and a mounting through hole are formed in the pole; the connecting component comprises a first connecting part, a second connecting part and a mounting lug boss, and the mounting lug boss is arranged on the second connecting part; an accommodating cavity and an inlet are formed in the first connecting part, and a tab cluster of the pole group can be inserted into the accommodating cavity through the inlet; the accommodating cavity is provided with a first limiting wall and a second limiting wall and is used for limiting the tab cluster inserted into the accommodating cavity; the second connecting part is installed in the installation groove, the installation protruding part is installed in the installation through hole, and a welding area located on the outer side of the projection of the installation protruding part is formed on the second connecting part in the first preset direction. It can be seen that by redesigning the structures of the connecting piece and the pole, whether the connecting piece and the pole are installed in place or not can be observed conveniently, and the mounting cavity is formed in the connecting component and used for inserting the tab cluster, so that the tab cluster is protected.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of batteries, in particular to a tab clamping type battery cell. BACKGROUND

[0002] At present, a battery cell comprises a pole group, a connecting sheet and a cover plate assembly; the connecting sheet is welded together with a tab cluster of the pole group and a pole post on the cover plate assembly; at present, the following two assembly structures are used for some pole posts and connecting sheets, first, a blind hole is formed on the pole post, the upper structure of the connecting sheet is inserted into the blind hole, and the connecting sheet is welded together with the pole post through penetration welding; since it is a blind hole, the connecting sheet cannot be observed to be inserted in place on the outside of the cover plate, that is, the outside of the pole post, which may cause problems such as false welding; second, a through hole is formed on the pole post, the upper structure of the connecting sheet is inserted into the through hole; this structure can observe whether the connecting sheet is inserted in place, but welding is difficult, and false welding is prone to occur, and even welding spatter may fall into the through hole. It can be seen that the two assembly structures have great problems, and therefore, a new type of assembly structure of the connecting sheet and the pole post needs to be developed at present, which is convenient for observing whether installation is in place and convenient for welding operation, and false welding is not prone to occur. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a tab clamping type battery cell, which solves the technical problem in the prior art that a new type of assembly structure of the connecting sheet and the pole post needs to be developed at present, which is convenient for observing whether installation is in place and convenient for welding operation, and false welding is not prone to occur.

[0004] The application provides a tab clamping type battery cell, which comprises a cover plate, a pole post and a connecting member; the pole post is installed on the cover plate, the pole post is formed with an installation groove and an installation through hole which are sequentially arranged and connected along a first preset direction, the installation groove penetrates the inside of the pole post close to the pole group, and the installation through hole penetrates the outside of the pole post away from the pole group;

[0005] The connecting member comprises a first connecting part, a second connecting part and an installation protruding part which are sequentially connected, and along the first preset direction, the installation protruding part is arranged on the outside of the second connecting part away from the pole group; the first connecting part is located on the inside of the cover plate close to the pole group, the first connecting part is formed with an accommodation cavity and an inlet which extend along a second preset direction, and the tab cluster of the pole group can be inserted into the accommodation cavity through the inlet;

[0006] Along the first preset direction, the accommodating cavity has a first limiting wall and a second limiting wall, and is used for limiting the tab cluster; the second connecting part is installed in the installation groove, the installation protruding part is installed in the installation through hole, and along the first preset direction, the second connecting part is formed with a welding area located outside the projection of the installation protruding part.

[0007] In the above technical solution, further, the first connecting part is formed with a guide groove penetrating along the first preset direction and along the second preset direction perpendicular to the first preset direction, and along the second preset direction, the guide groove is arranged at the side of the accommodating cavity and is connected in communication;

[0008] The guide groove is formed with an arc-shaped guide wall and a horizontal guide wall arranged in sequence along the first preset direction, and the horizontal guide wall is arranged close to the accommodating cavity, and the center of the arc-shaped guide wall is arranged away from the accommodating cavity; along the first preset direction, the second limiting wall is arranged close to the pole group side relative to the first limiting wall, and the horizontal guide wall is arranged in abutment and flush with the second limiting wall.

[0009] In any of the above technical solutions, further, along the first preset direction, the tangent line of the arc-shaped guide wall at the intermediate height position forms an angle α with the horizontal guide wall, and 130° < α < 145°.

[0010] In any of the above technical solutions, further, along the first preset direction, the first limiting wall is arranged close to the cover plate side relative to the second limiting wall, and the first limiting wall is formed with an observation hole in communication with the outside and the accommodating cavity.

[0011] In any of the above technical solutions, further, the number of observation holes is multiple, and the observation holes are arranged in sequence and at intervals along a third preset direction perpendicular to the first preset direction.

[0012] In any of the above technical solutions, further, along the second preset direction, the length of the observation hole is Y1, and 6mm < Y1 < 12mm.

[0013] In any of the above technical solutions, further, along the first preset direction, the side of the accommodating cavity close to the second connecting part is formed with an outlet; the observation hole is a waist-shaped hole arranged along the second preset direction, and along the first preset direction, the minimum distance between the center of the end of the observation hole close to the outlet and the edge of the outlet is Y2, and 2mm < Y2 < 3mm.

[0014] In any of the above technical solutions, further, the second connecting part comprises a plug-in part and a welding part connected with each other; wherein, along a second preset direction perpendicular to the first preset direction, the welding part is arranged at a side of the plug-in part; along the first preset direction, the mounting protruding part is arranged at an end of the welding part away from the pole group.

[0015] In any of the above technical solutions, further, along a third preset direction perpendicular to the first preset direction, at least one side of the plug-in part is formed with an auxiliary heat dissipation part exceeding the welding part.

[0016] In any of the above technical solutions, further, the plug-in part and the first connecting part are combined into a plate-shaped structure in L shape.

[0017] In any of the above technical solutions, further, the mounting protruding part, the plug-in part, the welding part and the first connecting part are in an integral structure.

[0018] In any of the above technical solutions, further, the number of the pole groups is two, and the number of the first connecting parts and the plug-in parts is also two, and each of the first connecting parts and the plug-in parts corresponds to one of the pole groups, and along the second preset direction, the two plug-in parts and the two first connecting parts are symmetrically arranged at opposite sides of the welding part.

[0019] In any of the above technical solutions, further, along the first preset direction, a side of the pole post away from the pole group is formed with a welding thinning area outside a periphery of the mounting through hole, and the welding thinning area is arranged corresponding to the welding area.

[0020] In any of the above technical solutions, further, along the first preset direction, the depth of the welding thinning area is L1, and 0.5mm < L1 < 0.7mm.

[0021] In any of the above technical solutions, further, along a direction perpendicular to the first preset direction, the width of the welding thinning area is L0, and 2mm < L0 < 3mm.

[0022] In any of the above technical solutions, further, the welding thinning area and the welding area are ring-shaped areas matched with each other.

[0023] In any of the above technical solutions, further, along a direction perpendicular to the first preset direction, the width of the welding thinning area is L0, along the first preset direction, the projection of the mounting protrusion falls within the projection of the second connecting part, and the gap between the two projections along a second preset direction perpendicular to the first preset direction is L2, the gap between the two projections along a third preset direction perpendicular to the first preset direction is L3, and L2>L0, L3>L0.

[0024] In any of the above technical solutions, further, along the first preset direction, the mounting protrusion does not protrude from the pole column, and the height difference between the two is S, and 0.1mm<S<0.2mm.

[0025] In any of the above technical solutions, further, along the first preset direction, the height of the mounting protrusion is h, and 0.6mm<h<1.2mm.

[0026] In any of the above technical solutions, further, along the first preset direction, the projection of the mounting protrusion falls within the projection of the second connecting part, and the gap between the two projections along the length direction of the tab cluster is L2, the gap between the two projections along the width direction of the tab cluster is L3, and L2>L3.

[0027] In any of the above technical solutions, further, along the first preset direction, the depth of the mounting groove is H, and 4mm<H<5mm.

[0028] In any of the above technical solutions, further, the welding area is an annular area around the projection of the mounting protrusion along the first preset direction.

[0029] In any of the above technical solutions, further, the mounting through hole is matched with the mounting protrusion, and the mounting groove is matched with the second connecting part.

[0030] In any of the above technical solutions, further, along the first preset direction, the first connecting part and the tab cluster are welded from the outside of the side wall of the accommodating cavity.

[0031] In any of the above technical solutions, further, the tab clamping type battery cell further comprises a lower plastic, an upper plastic, a welding ring and a sealing ring; wherein the cover plate is formed with a first through hole penetrating through both sides thereof along the first preset direction, the pole post is installed in the first through hole, the sealing ring is compressed between the outer sidewall of the pole post and the hole wall of the first through hole; the lower plastic is arranged on the inner side of the cover plate close to the pole group, and along the first preset direction, the lower plastic is formed with a second through hole corresponding to the first through hole; the welding ring is sleeved outside the pole post and connected with the pole post by welding; and the upper plastic is wrapped outside the welding ring by injection molding.

[0032] Compared with the prior art, the application has the following beneficial effects:

[0033] In the tab clamping type battery cell provided by the application, the structure of the connecting piece and the pole post is redesigned, the mounting protrusion is arranged on the connecting member, the mounting protrusion can be installed in the mounting through hole of the pole post, the structure is exposed, and thus it is convenient to observe whether the assembly is in place, the side portion of the connecting member below the mounting protrusion is provided with a welding area, so that the pole post structure outside the mounting protrusion and the welding area can be penetrated and welded, the operation is simple and convenient, the requirement for personnel is low, that is, the fault tolerance rate is improved, and the situation that the virtual welding and welding spatter fall into the through hole does not occur, so that the welding quality is greatly improved, in addition, part of the structure of the connecting member is directly inserted into the mounting groove and the mounting through hole of the pole post, so that the space is greatly saved, the occupied space of the connecting piece in the battery cell is effectively reduced, and the space utilization rate is improved.

[0034] In addition, the part of the connecting member matched with the pole post in the application is the second connecting portion and the mounting protrusion, compared with the sheet structure, the matching area with the pole post is increased, so that the heat dissipation is improved, especially the exposure of the mounting protrusion further improves the heat dissipation effect, and the use performance of the battery cell is ensured.

[0035] In addition, in the prior art, the protection piece is usually installed on the side of the pole group cluster away from the connecting piece, and the protection piece and the connecting piece are welded together, so that the protection piece and the connecting piece clamp the tab cluster, and the protection piece plays a role in protecting the tab cluster, but this structure occupies a large space and has a low space utilization rate, and in the application, the part assembled with the tab cluster of the pole group is redesigned, the tab cluster can be directly inserted into the accommodating cavity in the first connecting portion through the opening at the end, so that the first limiting wall above the tab cluster plays a role in protecting the tab cluster during welding, and the structure of the protection piece is saved, the space utilization rate is improved, and the material cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 The structural schematic diagram of the connecting member provided for the embodiment of the present application is shown in the figure.

[0038] Figure 2 Another structural schematic diagram of the connecting member provided for the embodiment of the present application is shown in the figure.

[0039] Figure 3 The sectional view of the connecting member provided for the embodiment of the present application is shown in the figure.

[0040] Figure 4 The structural schematic diagram of the pole provided for the embodiment of the present application is shown in the figure.

[0041] Figure 5 Another structural schematic diagram of the pole provided for the embodiment of the present application is shown in the figure.

[0042] Figure 6 The sectional view of the pole provided for the embodiment of the present application is shown in the figure.

[0043] Figure 7 The exploded view of the cover plate part provided for the embodiment of the present application is shown in the figure.

[0044] Figure 8 The sectional view of the tab-clip type battery cell provided for the embodiment of the present application is shown in the figure.

[0045] Figure 9 The partial enlarged schematic diagram of Figure 8

[0046] Figure 10 The enlarged structural schematic diagram of Figure 9 at A.

[0047] Reference signs:

[0048] ​1-cover plate, 2-pole, 21-mounting groove, 22-mounting through hole, 23-welding thin area, 24-stop step, 3-connecting member, 31-first connecting part, 311-receiving cavity, 312-first limiting wall, 313-second limiting wall, 314-inlet, 315-outlet, 316-guiding groove, 317-arc-shaped guiding wall, 318-horizontal guiding wall, 319-viewing hole, 32-second connecting part, 321-plug-in part, 322-welding part, 3221-welding area, 323-assistant heat dissipation part, 33-mounting protrusion, 4-pole group, 41-tab cluster, 5-lower plastic, 6-sealing ring, 7-pressing insulation structure. DETAILED DESCRIPTION

[0049] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments.

[0050] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0051] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0052] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The following will be described with reference to Figures 1 to 10To describe the tab clamping type battery cell according to some embodiments of the present application.

[0055] Referring to Figures 1 to 10 As shown in the drawings, the embodiments of the present application provide a tab clamping type battery cell, comprising: comprising: a cover plate 1, a pole 2 and a connecting member 3; wherein the pole 2 is installed on the cover plate 1, and the pole 2 is formed with an installation groove 21 and an installation through hole 22 which are sequentially arranged and connected along a first preset direction a, and the installation groove 21 penetrates the inside of the pole 2 close to the pole group 4, and the installation through hole 22 penetrates the outside of the pole 2 away from the pole group 4, that is, a stop step 24 is formed between the installation through hole 22 and the installation groove 21;

[0056] The connecting member 3 comprises a first connecting part 31, a second connecting part 32 and an installation protruding part 33 which are sequentially connected, and along the first preset direction a, the installation protruding part 33 is arranged on the outside of the second connecting part 32 away from the pole group 4; the first connecting part 31 is located on the inside of the cover plate 1 close to the pole group 4, and the first connecting part 31 is formed with a containing cavity 311 extending along a second preset direction b and an inlet 314 connected with the outside and the containing cavity 311, and the tab cluster 41 of the pole group 4 can be inserted into the containing cavity 311 through the inlet 314;

[0057] Along the first preset direction a, the containing cavity 311 has a first limiting wall 312 and a second limiting wall 313, and is used for limiting the tab cluster 41 inserted into the containing cavity 311; the second connecting part 32 is installed in the installation groove 21, the stop step 24 described above can limit the second connecting part 32, the installation protruding part 33 is installed in the installation through hole 22, and along the first preset direction a, the second connecting part 32 is formed with a welding area 3221 located on the projection outside of the installation protruding part 33.

[0058] According to the above described structure, it can be known that in the tab clamping type battery cell provided by the present application, the structure of the connecting sheet and the pole 2 is redesigned, the installation protruding part 33 is arranged on the connecting member 3, the installation protruding part 33 can be installed in the installation through hole 22 of the pole 2, due to the structure exposed, it is further convenient to observe whether the assembly is in place, and the side part of the connecting member 3 below the installation protruding part 33 is provided with the welding area 3221, so that the pole 2 structure outside the installation protruding part 33 and the welding area 3221 can be penetrated and welded, which is simple and convenient to operate, and the requirement for personnel is low, that is, it is helpful to improve the fault tolerance rate, and the conditions of virtual welding and welding spatter falling into the through hole do not occur, which greatly improves the welding quality, in addition, the part of the connecting member 3 is directly inserted into the installation groove 21 and the installation through hole 22 of the pole 2, which greatly saves the space, effectively reduces the occupied space of the connecting sheet in the battery cell, and improves the space utilization.

[0059] In addition, the part of the connecting member 3 in the application that cooperates with the pole post 2 is the second connecting part 32 and the mounting protruding part 33, compared with the sheet-like structure, the cooperation area with the pole post 2 is increased, which further helps to improve the heat dissipation, especially the exposure of the mounting protruding part 33, which further improves the heat dissipation effect, and helps to ensure the use performance of the battery cell.

[0060] In addition, the protection sheet is usually mounted on the side of the pole group 4 away from the connecting sheet in the prior art, and the protection sheet is welded together with the connecting sheet, so that the protection sheet and the connecting sheet clamp the tab cluster 41, avoiding the welding head directly contacting the tab cluster 41, and the protection sheet plays a role in protecting the tab cluster 41. However, such a structure occupies a large space and has a low space utilization rate. In the application, the structure of the connecting sheet assembled with the tab cluster 41 of the pole group 4 is redesigned. The accommodating cavity 311 is formed on the first connecting part 31 of the connecting member 3. The tab cluster 41 can be directly inserted into the accommodating cavity 311 in the first connecting part 31 through the inlet 314 at the end. Then, the first limiting wall 312 above the tab cluster 41 plays a role in protecting the tab cluster 41 during welding. In addition, the structure of the protection sheet is saved, the space utilization rate is improved, and the material cost is reduced.

[0061] Further, preferably, the first preset direction a described above can be the thickness direction of the cover plate 1, which can also be understood as the height direction of the pole group 4. Of course, it is not limited to this.

[0062] Further, preferably, the second preset direction b is the width direction of the cover plate 1, which can also be understood as the width direction of the pole group 4, i.e., the thickness direction. At the same time, the width direction of the tab cluster 41 of the pole group 4 is also the same as the width direction of the cover plate 1. Of course, it is not limited to this.

[0063] Further, preferably, along the second preset direction b, the side of the accommodating cavity 311 away from the second connecting part 32 is formed with the inlet 314 described above.

[0064] In this embodiment, preferably, as shown in Figure 1 and Figure 3 The first connecting part 31 is formed with a guide groove 316 penetrating along the first preset direction a and along the second preset direction b perpendicular to the first preset direction a, that is, the guide groove 316 has a first opening along the first preset direction a. The guide groove 316 along the second preset direction b is formed with a second opening, and along the second preset direction b, the guide groove 316 is arranged at the side of the accommodating cavity 311 and is in communication;

[0065] The guide groove 316 is formed with arc-shaped guide walls 317 and horizontal guide walls 318 arranged in sequence along the first preset direction a, and the horizontal guide walls 318 are arranged close to the accommodating cavity 311, and the centers of the arc-shaped guide walls 317 are arranged away from the accommodating cavity 311; along the first preset direction a, the second limiting wall 313 is arranged close to the pole group 4 side relative to the first limiting wall 312, and the horizontal guide wall 318 is arranged in abutment and flush with the second limiting wall 313.

[0066] According to the above-described structure, the inclined guide walls and the horizontal guide walls 318 arranged in sequence along the first preset direction a in the guide groove 316 play a guiding role for the lug cluster 41 during installation, so that the lug cluster 41 can be quickly slid into the accommodating cavity 311 along the inclined guide walls and the horizontal guide walls 318 in sequence, improving assembly efficiency.

[0067] Further, preferably, the opening of the guide groove 316 is arranged towards the cover plate 1 side, and along the first preset direction a, the arc-shaped guide wall 317 is located obliquely above the horizontal guide wall 318, and the tangent line of the arc-shaped guide wall 317 is arranged obliquely towards the horizontal guide wall 318. Of course, it is not limited to this, the arc-shaped guide wall 317 can also be located obliquely below the horizontal guide wall 318, and the specific design is according to actual needs.

[0068] It should be noted that the above-mentioned guide groove 316 can also not be provided, and the specific selection is according to actual needs.

[0069] In this embodiment, preferably, as shown in Figure 3 along the first preset direction a, the tangent line of the arc-shaped guide wall 317 at the middle height position forms an angle α with the horizontal guide wall 318, and 130°<α<145°.

[0070] According to the above-described structure, if α is too small, it cannot play a good guiding role, and if α is too large, the length of the horizontal guide wall 318 becomes small, cannot be well connected with the second limiting wall 313, and can cause the lug cluster 41 to be stuck and the like, and cannot be quickly slid into the accommodating cavity 311, because α is taken to be between 130° and 145°.

[0071] Of course, the range of values of α is not limited to the above, and α can also be taken to be ≤130°, or α can be taken to be ≥145°, and the specific selection is according to actual needs.

[0072] In this embodiment, preferably, as shown in Figure 1 along the first preset direction a, the first limiting wall 312 is arranged close to the cover plate 1 side relative to the second limiting wall 313, and the first limiting wall 312 is formed with an observation hole 319 in communication with the outside and the accommodating cavity 311.

[0073] According to the above structure, the dynamic insertion process of the tab cluster 41 can be detected through the observation hole 319, for example, whether there is a problem such as a wrinkle.

[0074] In this embodiment, as shown in the figure, along the second preset direction b, the length of the observation hole 319 is Y1, and 6mm < Y1 < 12mm. Figure 3

[0075] According to the above structure, if the length Y1 of the observation hole 319 is too small, it is inconvenient to observe, and if the length Y1 of the observation hole 319 is too large, it has an impact on the strength of the first limiting wall 312, and makes the processing more complicated, so Y1 is taken between 6mm-12mm.

[0076] Of course, the value range of Y1 is not limited to the above, Y1 can also be ≤6mm, or Y1 ≥12mm, which is selected according to actual needs.

[0077] In this embodiment, as shown in the figure, Figure 3 along the first preset direction a, the side of the accommodating cavity 311 close to the second connecting part 32 is formed with an outlet 315; the observation hole 319 is a waist-shaped hole arranged along the first preset direction a, and along the first preset direction a, the minimum distance between the center of the end of the observation hole 319 close to the outlet 315 and the edge of the outlet 315 is Y2, and 2mm < Y2 < 3mm.

[0078] According to the above structure, if Y2 is too large, the tab cluster 41 cannot be observed when it moves to the tail end of the accommodating cavity 311, and if Y2 is too small, the structure between the observation hole 319 and the outlet 315 is thinned, which is relatively weak at this position and is easy to damage, so Y2 is taken between 2mm-3mm. Of course, the value range of Y2 is not limited to the above, Y2 can also be ≤2mm, or Y2 ≥3mm, which is selected according to actual needs.

[0079] In this embodiment, as shown in the figure, Figure 1 and Figure 3 the second connecting part 32 includes a plug-in part 321 and a welding part 322 connected; along the second preset direction b perpendicular to the first preset direction a, the welding part 322 is arranged on the side of the plug-in part 321; along the first preset direction a, the mounting protrusion 33 is arranged at the end of the welding part 322 away from the pole group 4.

[0080] ​According to the above-described structure, the welding portion 322 not only supports and connects the first connecting portion 31 and the mounting protruding portion 33, but also penetrates and is welded with the structure of the pole piece 2 outside the mounting protruding portion 33; the insertion portion 321 connects the first connecting portion 31, supports the welding portion 322, and cooperates with the pole piece 2.

[0081] In this embodiment, preferably, as shown in Figure 1 the two sides of the insertion portion 321 are formed with auxiliary heat dissipation portions 323 beyond the welding portion 322 along a third preset direction c perpendicular to the first preset direction a.

[0082] According to the above-described structure, the auxiliary heat dissipation portions 323 are arranged at the two ends of the insertion portion 321, which increases the heat dissipation area and improves the heat dissipation effect, thereby helping to improve the performance of the battery cell.

[0083] Further, preferably, the third preset direction c is the length direction of the cover plate 1, and the length direction of the cover plate 1 is the same as the length direction of the pole group 4, and the length direction of the tab cluster 41 of the pole group 4 is the same as the length direction of the cover plate 1 as described above, that is, any two of the first preset direction a, the second preset direction b, and the third preset direction c are arranged perpendicularly. Of course, the third preset direction c is not limited to the above definition, but can be selected according to actual needs. In addition, it should be noted that preferably, the length direction of the tab cluster 41 of the pole group 4 is the same as the length direction of the pole group 4, and the width direction of the tab cluster 41 of the tab cluster 41 is the same as the width direction of the pole group 4.

[0084] It should be noted that the structure of arranging the auxiliary heat dissipation portions 323 on both sides of the insertion portion 321 is not limited to the above, but the auxiliary heat dissipation portions 323 can also be arranged on only one side of the insertion portion 321, and the auxiliary heat dissipation portions 323 can also be arranged in other directions, and the like. It should be noted that the auxiliary heat dissipation portions 323 can also not be arranged, and the specific arrangement can be selected according to actual needs.

[0085] In this embodiment, preferably, as shown in Figure 1 and Figure 3 the insertion portion 321 and the first connecting portion 31 are combined into an L-shaped plate structure, and preferably, the bending portion of the L-shaped plate structure is arc-shaped to avoid sharp corners.

[0086] According to the structure described above, the plug-in part 321 and the first connecting part 31 combine to form a simple L-shaped structure, wherein the first connecting part 31 is arranged parallel to the cover plate 1, facilitating cooperation with the tab cluster 41 after flattening, and helping to save space and improve space utilization; the plug-in part 321 is preferably arranged along the first preset direction a, such as the vertical direction, thereby facilitating insertion into the mounting groove 21 arranged along the first preset direction a, such as the vertical direction. It should be noted that the plug-in part 321 is not limited to being arranged along the first preset direction a, but can also be arranged obliquely along a direction forming an acute or obtuse angle with the first preset direction a.

[0087] Further, preferably, the first connecting part 31 is a rectangular plate, and the plug-in part 321 is a rectangular plate. Of course, the shapes of the first connecting part 31 and the second connecting part 32 are not limited to the above, but can be designed according to actual needs.

[0088] In this embodiment, as shown in Figure 1 the mounting protrusion 33, the plug-in part 321, the welding part 322, and the first connecting part 31 are of an integrated structure.

[0089] According to the structure described above, the second connecting member 3 is of an integrated structure, has high overall strength, is not easy to damage, and has a long service life. Of course, it is not limited to this, but can also be of a split structure and connected by welding or the like during assembly.

[0090] In addition, it should be noted that when the connecting member 3 of the present application is used as a connecting structure cooperating with the positive pole of the pole 2, i.e., the positive pole 2 and the positive tab cluster 41 of the pole group 4, the mounting protrusion 33, the welding part 322, the plug-in part 321, and the first connecting part 31 are of the same material. When the connecting member 3 of the present application is used as a connecting structure cooperating with the negative pole of the pole 2, i.e., the negative pole 2 and the negative tab cluster 41 of the pole group 4, the mounting protrusion 33 and the plug-in part 321 are of the same material, the mounting protrusion 33 and the welding part 322 are of the same material, for example, both can be copper, and the plug-in part 321 and the first connecting part 31 are of the same material, for example, can be aluminum. Whether the parts of the connecting member 3 are of the same material or not, they can be formed into an integrated structure by rolling or the like.

[0091] In this embodiment, as shown in Figure 6 the welding part 322 and the plug-in part 321 combine to form a rectangular or square structure, which is regular in shape, facilitating processing and manufacturing and later assembly with the pole 2. Of course, it is not limited to this, and the welding part 322 and the plug-in part 321 can also combine to form structures of other shapes, such as cylindrical or prismatic shapes, for example, four-prismatic, five-prismatic, or six-prismatic, etc. Of course, it is not limited to this, but can also be of other shapes, etc., and the specific design can be made according to actual needs.

[0092] In this embodiment, preferably, as follows: Figure 6 As shown, the mounting protrusion 33 is a cuboid or cube, that is, it is a relatively short square block with a regular shape, which facilitates processing and manufacturing as well as subsequent assembly with the pole post 2. Of course, it is not limited to this. The mounting protrusion 33 can also adopt other shapes. For example, the mounting protrusion 33 can also be cylindrical or prismatic, such as a square prism, pentagonal prism, or hexagonal prism, etc. Of course, it is not limited to this. It can also be other structural shapes, etc., depending on the actual needs of the design.

[0093] In this embodiment, preferably, as follows: Figures 7 to 9 As shown, there are two pole groups 4, and the two pole groups 4 share two pole posts 2, one positive pole post 2 and one negative pole post 2. Since the assembly structure of the two pole posts 2 is the same, only one is used as an example. For a single pole post 2, there are two first connecting parts 31 and two plug-in parts 321, which correspond one-to-one with the two pole groups 4. Along the second preset direction b, the two plug-in parts 321 and the two first connecting parts 31 are symmetrically arranged on opposite sides of the welding part 322.

[0094] As can be seen from the structure described above, for the structure of two pole groups 4 and one pole post 2, one of the first connecting parts 31 is welded to the pole lugs 41 of one of the pole groups 4, and the other first connecting part 31 is welded to the pole lugs 41 of the other pole group 4. Each first connecting part 31 is equipped with a plug-in part 321, and a welding part 322 is provided between the two plug-in parts 321, that is, they share a welding part 322. It can be seen that the connection structure on both sides shares a welding part 322, which saves space and materials, greatly improves space utilization, and reduces costs.

[0095] Furthermore, preferably, the two auxiliary heat dissipation parts 323, the two plug-in parts 321 and the welding part 322 form an I-shaped structure. Correspondingly, the mounting groove 21 is also an I-shaped groove adapted to the aforementioned structure. Of course, it is not limited to this.

[0096] It should be noted that: not only limited to the structure of two pole groups 4 in the application, the number of pole groups 4 can also be one or more than two, then when the number of pole groups 4 is one, only one plug-in part 321 and one first connecting part 31 need to be provided for a single pole 2, when the number of pole groups 4 is more than two, such as three, four, five or eight and so on, and among them, for even number of pole groups 4, every two pole groups 4 as a group, can be arranged according to the structure of the connecting member 3 used by the aforementioned two pole groups 4, and for odd number of pole groups 4, along the arrangement order of pole groups 4, every two pole groups 4 as a group, can be arranged according to the structure of the connecting member 3 used by the aforementioned two pole groups 4, and for the extra single pole group 4, the structure of the connecting piece of the aforementioned one pole group 4 is used, that is, for the extra pole group 4 and the single pole 2, only one plug-in part 321 and one first connecting part 31 are provided, or other types of connecting piece structure, of course, not only limited to this, the two pole groups 4 or more than two pole groups 4 in the application can also not be divided into a group, share the welding part 322 structure, and each pole group 4 and the single pole 2 can also be separately provided with a connecting member 3, and each pole group 4 does not interfere with each other.

[0097] In addition, it should be noted that: in the embodiment, the number of poles 2 installed on the same cover plate 1 is not limited to the above two, but can also be one, which is selected according to actual needs.

[0098] In this embodiment, preferably, as shown in Figure 5 and Figure 6 , along the first preset direction a, the side of the pole 2 away from the pole group 4, that is, the outer side, is formed with a welding thinning area 23 located outside the peripheral hole 22, and the welding thinning area 23 is arranged corresponding to the welding area 3221.

[0099] According to the structure described above, a groove is provided on the pole 2 above the welding area 3221 of the connecting member 3, that is, a groove penetrating the side and top of the pole 2 is provided on the outer periphery of the mounting protrusion 33, which can thin the pole 2 on the outer periphery of the mounting protrusion 33, facilitate penetration welding, improve the effect of penetration welding, and also block welding spatter, and protect other structures outside the welding area 3221.

[0100] It should be noted that: this welding thinning area 23 can also not be provided, that is, no groove is provided on the outer side of the pole 2, which is selected according to actual needs.

[0101] In this embodiment, preferably, as shown in Figure 6 , along the first preset direction a, the depth of the welding thinning area 23 is L1, and 0.5mm<L1<0.7mm.

[0102] According to the above description, if the depth of the welding thinning area 23 is too small, it is not conducive to welding and shielding splashes, and if the depth of the welding thinning area 23 is too large, it causes the part of the pole 2 below the welding thinning area 23 to be too thin, and the structure after penetration welding is unstable, thereby making the depth L1 of the welding thinning area 23 take a value in the range of 0.5mm-0.7mm. Of course, the value range of L1 is not limited to the above, and L1 can also be ≤0.5mm or ≥0.7mm, which is selected according to actual needs.

[0103] In this embodiment, preferably, as shown in Figure 5 , along a direction perpendicular to the first preset direction a, the width of the welding thinning area 23 is L0, and 2mm

[0104] According to the above description, if the width of the welding thinning area 23 is too small, it causes the width of the welding area 3221 to be small, thereby causing the welding area to be small, resulting in an unstable and unreliable structure after welding, and if the width of the welding thinning area 23 is too large, it causes the width of the welding area 3221 to be large, resulting in more welding splashes, which has a large impact on other parts and is prone to interference, thereby making the width L0 of the welding thinning area 23 take a value in the range of 2mm-3mm. Of course, the value range of L0 is not limited to the above, and L0 can also be ≤2mm or ≥3mm, which is selected according to actual needs.

[0105] In this embodiment, preferably, as shown in Figure 1 and Figure 5 , the welding thinning area 23 and the welding area 3221 are annular regions.

[0106] According to the above description, the annular welding thinning area 23 and the annular welding area 3221 are used, the welding area is larger, the welding area 3221 is more uniformly distributed, the structure after welding is more firm and stable, and the welding effect is better.

[0107] It should be noted that the welding thinning area 23 and the welding area 3221 are not limited to the above-mentioned annular regions, but can also be fan-shaped annular regions, i.e., part of the annular region, or other shaped regions, which are designed according to actual needs.

[0108] In this embodiment, preferably, as shown in Figure 2 and Figure 5 , along a direction perpendicular to the first preset direction a, the width of the welding thinning area 23 is L0, along the first preset direction a, the projection of the mounting protrusion 33 falls within the projection of the second connecting part 32, and the gap between the two projections along the length direction of the tab cluster 41 is L2, and the gap between the two projections along the width direction of the tab cluster 41 is L3, and L2

[0109] According to the above description, only when L2 < L0 and L3 < L0, the welding thinning area 23 below can be completely covered by the welding area 3221, and the welding area is ensured. Of course, it is not limited to this, but can also be designed according to actual needs.

[0110] In this embodiment, preferably, as shown in the figure, along the first preset direction a, the mounting protrusion 33 does not protrude from the pole 2, and the height difference between the two is S, and 0.1mm < S < 0.2mm. Figure 9

[0111] According to the above description, after installation, an aluminum sheet, that is, a conductive sheet, needs to be installed on the top of the pole 2, and then the pole 2 and the aluminum sheet, that is, the conductive sheet, are welded together. If S is too small, the mounting protrusion 33 may protrude from the pole 2 due to processing errors, thereby lifting the aluminum sheet, that is, the conductive sheet, which is not conducive to the welding of the two. If S is too large, the depth of the mounting groove 21 is small, which makes the connecting member 3 unable to be inserted into place when assembled with the pole 2, so that S is between 0.1mm and 0.2mm. Of course, the range of S is not limited to the above, but S can also be ≤0.1mm or ≥0.2mm, which is selected according to actual needs.

[0112] In this embodiment, preferably, as shown in the figure, along the first preset direction a, the height of the mounting protrusion 33 is h, and 0.6mm < h < 1.2mm. Figure 3

[0113] According to the above description, the height h of the mounting protrusion 33 is in the range of 0.6mm-1.2mm, which not only meets the observation and positioning effect, but also avoids design allowance to avoid increasing material consumption and helps to improve space utilization, and also avoids interference with other structures.

[0114] Of course, the range of h is not limited to the above, but h can also be ≤0.6mm or ≥1.2mm, which is selected according to actual needs.

[0115] In this embodiment, preferably, as shown in the figure, along the first preset direction aa, the depth of the mounting groove 21 is H, and 4mm < H < 5mm. Figure 6

[0116] ​​​According to the structure described above, the depth H of the mounting groove 21 is too small, and the connecting member 3 cannot be inserted into place when assembled with the pole column 2. If the depth H of the mounting groove 21 is too large, the part of the pole column 2 and the connecting member 3 penetrated by welding is too thin, resulting in low welding strength. Therefore, the depth H of the mounting groove 21 is preferably in the range of 4mm-5mm. Of course, the range of H is not limited to the above, and H can be less than or equal to 4mm, or greater than or equal to 5mm, which can be selected according to actual needs.

[0117] In this embodiment, as shown in Figure 1 and Figure 5 , the welding area 3221 is an annular area around the projection of the mounting protrusion 33 along the first predetermined direction a.

[0118] According to the structure described above, the annular welding area 3221 is arranged around the entire outer periphery of the mounting protrusion 33, the welding area is larger, the welding area 3221 is more uniformly distributed, the structure after welding is more firm and stable, and the welding effect is better.

[0119] It should be noted that the welding area 3221 is not limited to the above-mentioned annular area, but can also be a sector-shaped area, i.e., a part of the annular area, or other shaped areas, which can be designed according to actual needs.

[0120] In this embodiment, as shown in Figure 9 , the mounting through hole 22 is adapted to the mounting protrusion 33, and the mounting groove 21 is adapted to the second connecting part 32, which ensures the assembly precision. Of course, it is not limited to this, but can also be a clearance fit or an interference fit, etc., which can be selected according to actual needs.

[0121] In this embodiment, as shown in Figure 9 , the tab-clamped battery cell further comprises a lower plastic 5, an upper plastic, a welding ring, and a sealing ring 6. The cover plate 1 is formed with a first through hole penetrating through both sides thereof along the first predetermined direction a, and the pole column 2 is installed in the first through hole. The sealing ring 6 is compressed between the outer side wall of the pole column 2 and the hole wall of the first through hole. The lower plastic 5 is arranged on the inner side of the cover plate 1 close to the pole group 4, and along the first predetermined direction a, the lower plastic 5 is formed with a second through hole corresponding to the first through hole. The welding ring is sleeved outside the pole column 2 and connected with the pole column 2 by welding. The upper plastic is wrapped outside the welding ring by injection molding, which plays a role of insulation protection. It can be seen that the upper plastic and the welding ring form an integrated compression insulation structure 7, which is more stable and reliable in structure, and the production efficiency is greatly improved.

[0122] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; 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.

Claims

1. A clip-on battery cell, characterized in that, The utility model relates to a cover plate, pole post and connecting component, wherein the pole post is installed on the cover plate, and the pole post is formed with installation slot and installation through hole which are sequentially arranged and connected along a first preset direction, the installation slot penetrates the inner side of the pole post close to the pole group, and the installation through hole penetrates the outer side of the pole post away from the pole group. The connecting component comprises first connecting part, second connecting part and installation protruding part which are sequentially connected, and along the first preset direction, the installation protruding part is arranged on the outer side of the second connecting part away from the pole group; the first connecting part is located on the inner side of the cover plate close to the pole group, and the first connecting part is formed with containing cavity and inlet which extend along a second preset direction, and the lug cluster of the pole group can be inserted into the containing cavity through the inlet; Along the first preset direction, the containing cavity is provided with first limiting wall and second limiting wall for limiting the lug cluster; the second connecting part is installed in the installation slot, the installation protruding part is installed in the installation through hole, and along the first preset direction, the second connecting part is formed with welding area which is located on the projection outer side of the installation protruding part. The first connecting part is formed with guide slot which penetrates along the first preset direction and along the second preset direction perpendicular to the first preset direction, and along the second preset direction, the guide slot is arranged on the side of the containing cavity and is connected; 2. The tabbed cell of claim 1, wherein, The guide slot is formed with arc-shaped guide wall and horizontal guide wall which are sequentially arranged along the first preset direction, and the horizontal guide wall is arranged close to the containing cavity, and the center of the arc-shaped guide wall is arranged away from the containing cavity; along the first preset direction, the second limiting wall is arranged close to the pole group side relative to the first limiting wall, and the horizontal guide wall is arranged in abutment and flush with the second limiting wall. Along the first preset direction, the tangent line of the arc-shaped guide wall at the intermediate height position and the horizontal guide wall form an angle alpha, and 130 DEG < alpha < 145 DEG.

3. The tabbed cell of claim 2, wherein, Along the first preset direction, the first limiting wall is arranged close to the cover plate side relative to the second limiting wall, and the first limiting wall is formed with observation hole which is connected with the outside and the containing cavity.

4. The tabbed cell of claim 1, wherein, The number of the observation holes is multiple, and the observation holes are sequentially and spacedly arranged along a third preset direction perpendicular to the first preset direction; and / or 5. The tabbed cell of claim 4, wherein, Along the second preset direction, the length of the observation hole is Y1, and 6mm < Y1 < 12mm; and / or Along the first preset direction, the side of the containing cavity close to the second connecting part is formed with outlet; the observation hole is waist-shaped hole arranged along the second preset direction, and along the first preset direction, the minimum distance between the center of the end of the observation hole close to the outlet and the edge of the outlet is Y2, and 2mm < Y2 < 3mm. ​ 6. The tabbed cell of claim 1, wherein, The second connecting part comprises a plug-in part and a welding part connected with each other; wherein, along a second preset direction perpendicular to the first preset direction, the welding part is arranged at a side of the plug-in part; along the first preset direction, the mounting protruding part is arranged at an end of the welding part away from the pole group.

7. The tabbed cell of claim 6, wherein, Along a third preset direction perpendicular to the first preset direction, at least one side of the plug-in part is formed with an auxiliary heat dissipation part exceeding the welding part; and / or The plug-in part and the first connecting part are combined into an L-shaped plate structure; and / or The mounting protruding part, the plug-in part, the welding part and the first connecting part are integrated; and / or The number of the pole groups is two, and the number of the first connecting parts and the plug-in parts is also two, and each corresponds to one of the pole groups, and along the second preset direction, the two plug-in parts and the two first connecting parts are symmetrically arranged at opposite sides of the welding part.

8. The tabbed cell of claim 1, wherein, Along the first preset direction, a side of the pole post away from the pole group is formed with a welding thinning area at the outer periphery of the mounting through hole, and the welding thinning area is arranged corresponding to the welding area.

9. The tabbed cell of claim 8, wherein, Along the first preset direction, the depth of the welding thinning area is L1, and 0.5mm Along a direction perpendicular to the first preset direction, the width of the welding thinning area is L0, and 2mm The welding thinning area and the welding area are matching annular areas; and / or Along a direction perpendicular to the first preset direction, the width of the welding thinning area is L0, along the first preset direction, the projection of the mounting protruding part falls within the projection of the second connecting part, and the gap between the two projections along a second preset direction perpendicular to the first preset direction is L2, the gap between the two projections along a third preset direction perpendicular to the first preset direction is L3, and L2>L0, L3>L0.

10. The tabbed cell of any one of claims 1-9, wherein, Along the first preset direction, the mounting protrusion does not protrude from the pole post, and the height difference between the two is S, and 0.1mm Along the first preset direction, the height of the mounting protruding part is h, and 0.6mm Along the first preset direction, the projection of the mounting protruding part falls within the projection of the second connecting part, and the gap between the two projections along the length direction of the tab cluster is L2, the gap between the two projections along the width direction of the tab cluster is L3, and L2>L3; and / or Along the first preset direction, the depth of the mounting groove is H, and 4mm The welding area is an annular area around the projection of the mounting protruding part along the first preset direction; and / or The mounting through hole is matched with the mounting protruding part, and the mounting groove is matched with the second connecting part; and / or Along the first preset direction, the first connecting part and the tab cluster are welded from the outside of the side wall of the accommodating cavity; and / or The tab-clamping battery cell further comprises a lower plastic, an upper plastic, a welding ring and a sealing ring; wherein the cover plate is formed with a first through hole penetrating through both sides thereof along the first preset direction, the pole post is installed in the first through hole, and the sealing ring is compressed between the outer sidewall of the pole post and the hole wall of the first through hole; the lower plastic is arranged on the inner side of the cover plate close to the pole group and along the first preset direction, and the lower plastic is formed with a second through hole corresponding to the first through hole; the welding ring is sleeved outside the pole post and connected with the pole post by welding; and the upper plastic is wrapped outside the welding ring by injection molding.

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