Split plug-in type battery cell
By using a split plug-in battery cell design, the problems of difficulty in observing the connection piece and electrode assembly and welding difficulties have been solved, achieving efficient and stable welding quality and space utilization, and improving the performance and transportation efficiency of the battery cell.
Patent Information
- Application Number
- CN202520009231.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-02
AI Technical Summary
The assembly structure of the connecting piece and the terminal in the existing battery cell is difficult to observe, and the welding operation is difficult and prone to cold solder joints.
The design features a split plug-in battery cell with mounting slots and through holes on the terminals. The connecting piece is divided into first and second connecting components, with mounting protrusions exposed inside and outside the through holes for easy observation of the assembly. A welding area is provided on the outer side for through welding.
It improves the observability of assembly and welding quality, reduces the risk of incomplete welding, saves space, enhances heat dissipation and space utilization, reduces transportation costs, and simplifies the assembly process.
Smart Images
Figure CN223728967U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of batteries, in particular to a split plug-in 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 with a pole lug cluster of the pole group and a pole post on the cover plate assembly respectively; 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 with the pole post by penetration welding; since it is a blind hole, the connecting sheet cannot be observed whether it is 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, at present, a new type of assembly structure of the connecting sheet and the pole post needs to be developed, which is convenient for observing whether the 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 split plug-in 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, which is convenient for observing whether the installation is in place and convenient for welding operation, and false welding is not prone to occur.
[0004] The application provides a split plug-in type battery cell, which comprises a cover plate, a pole post, a first connecting member and a second connecting member; wherein 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 first connecting member comprises a first connecting part and a second connecting part which are connected, and the first connecting part is connected with a pole lug cluster of the pole group; the second connecting member comprises a body and an installation protruding part which are connected, and along the first preset direction, the installation protruding part is arranged on the side of the body away from the pole group; the second connecting member has no connection relationship with the first connecting member when it is initially delivered and can be independently placed, and when assembled, the body of the second connecting member is installed on one side of the second connecting part of the first connecting member along a second preset direction, and the two are fixedly connected together;
[0006] The second connecting part and the body are installed in the installation slot, the installation protruding part is installed in the installation through hole, and along the first preset direction, the body and the second connecting part are formed with welding areas outside the projection of the installation protruding part.
[0007] In the above technical solution, further, one of the second connecting part and the body is formed with a plug-in protruding part arranged along the second preset direction, and the other is formed with a plug-in hole, and the plug-in protruding part is detachably plugged into the plug-in hole.
[0008] In any of the above technical solutions, further, the structure of the plug-in protruding part and the plug-in hole periphery is fixedly connected by riveting.
[0009] In any of the above technical solutions, further, along the first preset direction, the side of the pole column away from the pole group is formed with a welding thinning area outside the periphery of the installation through hole.
[0010] 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
[0011] In any of the above technical solutions, further, along the direction perpendicular to the first preset direction, the width of the welding thinning area is L0, and 2mm
[0012] In any of the above technical solutions, further, the welding thinning area and the welding area are matching annular areas.
[0013] In any of the above technical solutions, further, along the first preset direction, the projection of the installation protruding part falls into the body, and the edge of the projection of the installation protruding part abuts against the edge of the projection of the body.
[0014] In any of the above technical solutions, further, along the second preset direction, the thickness of the second connecting part is L2; along the third preset direction, the minimum distance between the edge of the installation protruding part and the edge of the body is L3; along the direction perpendicular to the first preset direction, the width of the welding thinning area is L0, and L0>L2, L0>L3; wherein, the third preset direction is perpendicular to the first preset direction and the second preset direction.
[0015] In any of the above technical solutions, further, along the first preset direction, the projection of the mounting protrusion is an oval shape, the projection of the body is a rectangle shape, and the long axis direction of the projection of the mounting protrusion is the same as the length direction of the body, and the short axis direction of the projection of the mounting protrusion is the same as the width direction of the body.
[0016] In any of the above technical solutions, further, the number of the pole groups is two, and the two pole groups are sequentially stacked along the second preset direction and share a pole post; the number of the first connecting members is two, and the two first connecting members are respectively arranged on opposite sides of the second connecting member along the second preset direction, and the two first connecting members respectively correspond to and are connected with the two pole groups.
[0017] In any of the above technical solutions, further, the second connecting part and the body are assembled to fit the mounting slot.
[0018] In any of the above technical solutions, further, the mounting protrusion fits the mounting through hole.
[0019] In any of the above technical solutions, further, along the first preset direction, the depth of the mounting slot is H, and 4mm<H<5mm.
[0020] 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.
[0021] In any of the above technical solutions, further, 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<S<0.2mm.
[0022] In any of the above technical solutions, further, the first connecting part and the second connecting part form an L-shaped structure.
[0023] In any of the above technical solutions, further, the split plug-in 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 mounted 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, 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.
[0024] Compared with the prior art, the application has the following beneficial effects:
[0025] The split plug-in type battery cell provided by the application has the following beneficial effects. The structure of the connecting piece and the pole post is redesigned, a mounting protrusion is arranged on the second connecting member, the mounting protrusion can be mounted in the mounting through hole of the pole post, the structure is exposed, and therefore it is convenient to observe whether the assembly is in place. In addition, the side portion of the second connecting member below the mounting protrusion is provided with a welding area. Therefore, 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 virtual welding and welding splashes fall into the through hole does not occur, so that the welding quality is greatly improved. In addition, part of the structure of the first connecting member and the second connecting member is directly plugged 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.
[0026] In addition, the connecting piece is designed as a split structure, that is, the first connecting member and the second connecting member, which belong to a split structure. Therefore, when the material is delivered, the L-shaped first connecting member and the block-shaped second connecting member are separately stacked and placed. Compared with the integral connecting piece structure, more connecting members can be stacked in a limited space, so that the transportation cost can be reduced. In addition, the assembly and feeding are more convenient, the assembly is simple, and the connecting piece is assembled separately. Compared with integral molding, the stress generated by ultrasonic welding of the tab cluster and the connecting piece does not affect the second connecting member, so that the assembly and welding of the second connecting member and the pole post are ensured.
[0027] In addition, the connecting structure composed of the first connecting member and the second connecting member in the application increases the heat dissipation area compared with the connecting piece in the prior art, improves the heat dissipation effect, and further helps to improve the performance of the battery cell. BRIEF DESCRIPTION OF DRAWINGS
[0028] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.
[0029] Figure 1 The first connecting member and the second connecting member provided by the embodiment of the application are provided in an exploded view.
[0030] Figure 2 The first connecting member and the second connecting member provided by the embodiment of the application are provided in an assembly view.
[0031] Figure 3 A structure schematic diagram of a pole provided by an embodiment of the present application is shown in the figure.
[0032] Figure 4 Another structure schematic diagram of a pole provided by an embodiment of the present application is shown in the figure.
[0033] Figure 5 A sectional view of a pole provided by an embodiment of the present application is shown in the figure.
[0034] Figure 6 Still another structure schematic diagram of a pole provided by an embodiment of the present application is shown in the figure.
[0035] Figure 7 Another assembly diagram of a first connecting member and a second connecting member provided by an embodiment of the present application is shown in the figure.
[0036] Figure 8 Still another assembly diagram of a first connecting member and a second connecting member provided by an embodiment of the present application is shown in the figure.
[0037] Figure 9 A sectional view of a split plug-in type battery cell provided by an embodiment of the present application is shown in the figure.
[0038] Figure 10 A structure schematic diagram of a split plug-in type battery cell provided by an embodiment of the present application is shown in the figure. Figure 9 An enlarged structure schematic diagram at A is shown in the figure.
[0039] Figure 11 An assembly diagram of a cover plate part provided by an embodiment of the present application is shown in the figure.
[0040] Figure 12 Another assembly diagram of a cover plate part provided by an embodiment of the present application is shown in the figure.
[0041] Reference signs:
[0042] 1-cover plate, 2-pole, 21-mounting groove, 22-mounting through hole, 23-welding thinning area, 24-stop step, 3-first connecting member, 31-first connecting part, 32-second connecting part, 321-plug-in hole, 4-second connecting member, 41-body, 42-mounting protruding part, 43-plug-in protruding part, 44-welding area, 5-pole group, 51-pole lug cluster, 6-lower plastic, 7-sealing ring, 8-pressing insulation structure. DETAILED DESCRIPTION
[0043] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.
[0044] The components of the application embodiments described and illustrated herein can be arranged and designed in a wide variety of different configurations. Therefore, the following detailed description of the application, read with reference to the accompanying drawings, is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application.
[0045] All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative labor shall fall within the scope of protection of the present application.
[0046] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to 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.
[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" 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.
[0048] The following refers to Figures 1 to 12 A split plug-in type battery cell according to some embodiments of the present application is described.
[0049] Referring to Figures 1 to 12 As shown in the drawings, the embodiments of the present application provide a split plug-in type battery cell, comprising: a cover plate 1, a pole 2, a first connecting member 3 and a second connecting member 4; wherein the pole 2 is mounted on the cover plate 1, and the pole 2 is formed with mounting grooves 21 and mounting through holes 22 which are sequentially arranged along a first predetermined direction a and are connected in communication, and the mounting grooves 21 penetrate the inner side of the pole 2 close to the pole group 5, and the mounting through holes 22 penetrate the outer side of the pole 2 away from the pole group 5, that is, the mounting through holes 22 and the mounting grooves 21 form a stop step 24 therebetween;
[0050] The first connecting member 3 comprises a first connecting part 31 and a second connecting part 32 connected with each other, the first connecting part 31 is located on the inner side of the cover plate 1 close to the pole group 5, and the first connecting part 31 connects the tab cluster 51 of the pole group 5; the second connecting member 4 comprises a body 41 and a mounting protrusion 42 connected with each other, and along the first preset direction a, the mounting protrusion 42 is arranged on the side of the body 41 away from the pole group 5, the second connecting member 4 has no connection relationship with the first connecting member 3 when the initial material is delivered and can be placed independently, and when assembled, the body 41 of the second connecting member 4 is mounted on one side of the second connecting part 32 of the first connecting member 3 along the second preset direction b, and the two are fixedly connected together.
[0051] The second connecting part 32 and the body 41 are both mounted in the mounting groove 21, the aforementioned stop step 24 limits the second connecting part 32 and the body 41, the mounting protrusion 42 is mounted in the mounting through hole 22, and along the first preset direction a, the body 41 and the second connecting part 32 are both formed with a welding area 44 located on the projection outer side of the mounting protrusion 42.
[0052] According to the structure described above, it can be known that the split plug-in type battery cell provided by the application, by redesigning the structure of the connecting sheet and the pole 2, the mounting protrusion 42 is arranged on the second connecting member 4, the mounting protrusion 42 can be mounted in the mounting 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 second connecting member 4 below the mounting protrusion 42 is provided with a welding area 44, so that the structure of the pole 2 located on the outer side of the mounting protrusion 42 and the welding area 44 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 situation that virtual welding and welding spatter fall into the through hole will not occur, which greatly improves the welding quality, in addition, the part structure of the first connecting member 3 and the second connecting member 4 is directly plugged into the mounting groove 21 and the mounting 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.
[0053] In addition, the connecting sheet is designed as a split structure in the application, that is, the aforementioned first connecting member 3 and the second connecting member 4, both belong to a split structure, so that when the material is delivered, the first connecting member 3 and the second connecting member 4 can be placed independently, compared with the integrated connecting sheet structure, more structure pieces can be stacked in the limited space, so that the transportation cost can be reduced, in addition, the assembly feeding is more convenient, and the assembly is convenient, and since the connecting sheet belongs to a split structure, compared with the integral forming, the stress generated by the ultrasonic welding of the tab cluster 51 and the first connecting member 3 will not affect the second connecting member 4, thereby ensuring the assembly and welding of the second connecting member 4 and the pole 2.
[0054] In addition, the connection structure composed of the first connecting member 3 and the second connecting member 4 in the present application increases the heat dissipation area compared with the connecting sheet in the prior art, improves the heat dissipation effect, and thus helps to improve the performance of the battery cell.
[0055] Further, preferably, the first preset direction a is the height direction of the split plug-in battery cell, the second preset direction b is the width direction of the pole group 5, i.e. the split plug-in battery cell, and can also be understood as the width direction of the cover plate 1, and the third preset direction c described below is the length direction of the pole group 5, i.e. the split plug-in battery cell, and can also be understood as the length direction of the cover plate 1, wherein any two of the first preset direction a, the second preset direction b and the third preset direction c are arranged perpendicular to each other. Of course, it is not limited to the above, but can also be designed according to actual needs. In addition, it should be noted that: preferably, the length direction of the tab cluster 51 of the pole group 5 is preferably the same as the length direction of the pole group 5, and the width direction of the tab cluster 51 of the pole group 5 is preferably the same as the width direction of the pole group 5.
[0056] Further, preferably, the cover plate 1 is formed with a first through hole penetrating through both sides thereof along the first preset direction a, and the pole post 2 is installed in the first through hole.
[0057] Further, preferably, the first connecting part 31 and the second connecting part 32 are arc-shaped transitionally connected to avoid sharp corners.
[0058] In this embodiment, preferably, as shown in Figure 1 、 Figure 2 、 Figure 7 and Figure 8 , the body 41 is formed with a plug-in protruding part 43 arranged along the second preset direction b, the second connecting part 32 is formed with a plug-in hole 321, and the plug-in protruding part 43 is detachably plugged into the plug-in hole 321.
[0059] According to the structure described above, the plug-in protruding part 43 cooperates with the plug-in hole 321 to achieve a detachable connection between the second connecting member 4 and the first connecting member 3. Especially in the early incoming material process, the plug-in protruding part 43 and the plug-in hole 321 can be kept in a separated state, that is, the first connecting member 3 and the second connecting member 4 are not assembled together, and the two can be placed separately for stacking, which is convenient for transportation. In the later assembly process, the plug-in protruding part 43 and the plug-in hole 321 are cooperated to achieve preliminary positioning, which improves the assembly efficiency and assembly accuracy, and also allows for proper debugging before final fixation.
[0060] It should be noted that: of course, it is not limited to this, but the second connecting part 32 can also be formed with a plug-in protruding part 43 arranged along the second preset direction b, the body 41 can be formed with a plug-in hole 321, and the plug-in protruding part 43 can be detachably plugged into the plug-in hole 321, which can be selected according to actual needs.
[0061] In addition, it should be noted that the assembly structure of the first connecting part 31 and the second connecting part 32 is not limited to the above, and the two can be connected by a buckle or the like.
[0062] In this embodiment, preferably, as shown in Figure 8 The structure of the plug-in protrusion 43 and the outer periphery of the plug-in hole 321 is fixedly connected by riveting.
[0063] According to the above-described structure, when the second connecting member 4 is assembled with the first connecting member 3, the plug-in protrusion 43 on the second connecting member 4 can be inserted into the plug-in hole 321 of the first connecting member 3, and the plug-in protrusion 43 exposed to the plug-in hole 321 can be riveted, thereby fixing the first connecting member 3 and the second connecting member 4 together, the structure is more firm, and the operation is relatively simple.
[0064] It should be noted that the structure of the plug-in protrusion 43 and the outer periphery of the plug-in hole 321 is not limited to being fixedly connected by riveting, but can also be connected by welding or the like.
[0065] In this embodiment, preferably, as shown in Figure 9 and Figure 10 In this embodiment, preferably, as shown in
[0066] Since the structures at the positive pole and the negative pole are the same, only one of the pole posts 2 is taken as an example. For a single pole post 2 and two pole groups 5, two first connecting members 3 and one second connecting member 4 are provided, the number of first connecting members 3 is two, and the two first connecting members 3 are respectively arranged on opposite sides of the second connecting member 4 along the second predetermined direction b, and the two first connecting members 3 are respectively corresponding to and connected with the two pole groups 5.
[0067] Further, preferably, the opposite sides of the body 41 of the second connecting member 4 are formed with plug-in protrusions 43, and the plug-in protrusions 43 are corresponding to the two first connecting members 3, that is, the plug-in protrusions 43 on the two sides are respectively matched with the plug-in holes 321 of the first connecting members 3 on the two sides, thereby realizing the assembly of one second connecting member 4 with two first connecting members 3 on the two sides.
[0068] It should be noted that: not only limited to the structure of the two pole groups 5, the number of pole groups 5 can be one or more than two, then the following will be described in detail: then when the number of pole groups 5 is one, only one first connecting member 3 needs to be provided for a single pole 2, when the number of pole groups 5 is more than two, for example, three, four, five or eight and so on, and among them, for even number of pole groups 5, every two pole groups 5 as a group, and for a single pole 2 common to a group of pole groups, a second connecting member 4 and two first connecting members 3 are needed, and for odd number of pole groups 5, every two pole groups 5 as a group along the arrangement order of the pole groups 5, the connecting member structure used by the preceding two pole groups 5 can be used, and for the extra single pole group 5, the connecting piece structure of the preceding one pole group 5 can be used, that is, for the extra pole group 5 and the single pole 2, a first connecting member 3 and a second connecting member 4 can be provided, or other types of connecting piece structures, of course, not only limited to this, in the case of two or more than two pole groups 5 in the present application, the two pole groups 5 can also not be divided into a group, and a connecting member and a second connecting member 4 can be separately provided between each pole group 5 and the single pole 2, and each pole group 5 does not interfere with each other.
[0069] In addition, it should be noted that: in the present 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.
[0070] In this embodiment, preferably, as shown in Figure 2 along the first predetermined direction a, the projection of the mounting protrusion 42 falls into the body 41, and the edge of the projection of the mounting protrusion 42 abuts against the edge of the projection of the body 41, increasing the area of the mounting protrusion 42 in a limited space, and further increasing the mating area of the mounting protrusion 42 with the mounting through hole 22 of the pole 2, improving the stability and firmness after assembly. Further, preferably, as shown in Figure 2 along the second predetermined direction b, the thickness of the second connecting portion 32 is L2; along the third predetermined direction c, the minimum distance between the edge of the mounting protrusion 42 and the edge of the body 41 is L3; along the direction perpendicular to the first predetermined direction, the width of the welding thinning area 23 is L0, and L0
[0071] It can be seen that only L0
[0072] In this embodiment, preferably, as shown inFigure 1 and Figure 2 As shown in the figure, along the first preset direction a, the projection of the mounting protrusion 42 is an ellipse, the projection of the body 41 is a rectangle, and the long axis direction of the projection of the mounting protrusion 42 is the same as the length direction of the body 41, and the short axis direction of the projection of the mounting protrusion 42 is the same as the width direction of the body 41.
[0073] According to the above-described structure, the length of the mounting protrusion 42 is increased to improve the area of the mounting protrusion 42 fitting with the mounting through hole 22 of the cover plate 1, and the stability after assembly is improved.
[0074] In this embodiment, preferably, as shown in the figure, Figure 5 and Figure 6 As shown in the figure, along the first preset direction a, the side of the pole column 2 away from the pole group 5 is formed with a welding thinning area 23 located at the outer periphery of the mounting through hole 22.
[0075] According to the above-described structure, the groove penetrating the side and the top of the pole column 2 at the outer periphery of the mounting protrusion 42 is provided, and the inner side of the groove close to the mounting through hole 22 is in a penetrating state. This groove is the thinning area, which facilitates penetration welding and improves the effect of penetration welding, and also blocks welding spatters to protect other structures outside the welding area 44.
[0076] It should be noted that the welding thinning area 23 can also not be provided, that is, no groove is provided at the outer side of the pole column 2, which is selected according to actual needs.
[0077] In this embodiment, preferably, as shown in the figure, Figure 5 As shown in the figure, along the first preset direction, the depth of the welding thinning area 23 is L1, and 0.5mm
[0078] According to the above-described structure, if the depth of the welding thinning area 23 is too small, it is not conducive to welding and shielding spatters, and if the depth of the welding thinning area 23 is too large, the part of the pole column 2 below the welding thinning area 23 is too thin, the structure is unstable after penetration welding, and the depth L1 of the welding thinning area 23 is taken as a value between 0.5mm and 0.7mm. Of course, the value range of L1 is not limited to the above, L1 can also be taken as ≤0.5mm, or L1 can also be taken as ≥0.7mm, which is selected according to actual needs.
[0079] In this embodiment, preferably, as shown in the figure, Figure 6 As shown in the figure, along the direction perpendicular to the first preset direction, the width of the welding thinning area 23 is L0, and 2mm
[0080] According to the structure described above, if the width of the welding thinning area 23 is too small, the width of the welding area 44 is small, and the welding area is small, which leads to an unstable and unreliable structure after welding. If the width of the welding thinning area 23 is too large, the width of the welding area 44 is large, and there are more welding spatters, which greatly affects other parts and is prone to interference. Therefore, the width L0 of the welding thinning area 23 is preferably between 2 mm and 3 mm. Of course, the range of L0 is not limited to the above, and L0 can be less than or equal to 2 mm, or greater than or equal to 3 mm, which is selected according to actual needs.
[0081] In this embodiment, as shown in Figure 1 、 Figure 2 and Figure 6 , the welding thinning area 23 and the welding area 44 are annular areas.
[0082] According to the structure described above, the welding thinning area 23 and the welding area 44 are annular, the welding area is larger, the welding area is more evenly distributed, the structure after welding is more stable and reliable, and the welding effect is better.
[0083] It should be noted that the welding thinning area 23 and the welding area 44 are not limited to the above-mentioned annular area, but can also be a fan-shaped annular area, that is, a part of the annular area, or other shapes, which is designed according to actual needs.
[0084] In this embodiment, as shown in Figure 5 , along the first preset direction a, the depth of the mounting groove 21 is H, and 4 mm < H < 5 mm.
[0085] According to the structure described above, if the depth H of the mounting groove 21 is too small, the second connecting member 4 and part of the structure of the first connecting member 3 cannot be inserted into place when assembled with the pole 2. If the depth H of the mounting groove 21 is too large, the part of the pole 2 and the second connecting member 4 and the second connecting member 4 penetrates the thin part of the welding position, which leads to low welding strength, and the depth H of the mounting groove 21 is preferably in the range of 4 mm to 5 mm. Of course, the range of H is not limited to the above, and H can be less than or equal to 4 mm, or greater than or equal to 5 mm, which is selected according to actual needs.
[0086] In this embodiment, as shown in Figure 7 , along the first preset direction a, the height of the mounting protrusion 42 is h, and 0.6 mm < h < 1.2 mm.
[0087] According to the above-described structure, the height h of the mounting protrusion 42 is in the range of 0.6mm-1.2mm, which not only meets the observation and positioning effect, but also avoids the design allowance to avoid increasing the material consumption and improve the space utilization, and also avoids interference with other structures. Of course, the range of h is not limited to the above, but also h≤0.6mm, or h≥1.2mm, which is selected according to actual needs.
[0088] In this embodiment, preferably, as shown in Figures 1 to 3 along the first preset direction a, the mounting protrusion 42 does not protrude from the pole 2, and the height difference between the two is S, and 0.1mm<S<0.2mm.
[0089] According to the above-described structure, after installation, an aluminum sheet, i.e. a conductive sheet, needs to be installed on the top of the pole 2, and then the pole 2 and the aluminum sheet, i.e. the conductive sheet, are welded together. If S is too small, the mounting protrusion 42 may protrude from the pole 2 due to processing errors, thereby lifting the aluminum sheet, i.e. 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 further causes the second connecting member 4 and part of the structure of the first connecting member 3 to be unable to be inserted into place when assembled with the pole, thereby making S in the range of 0.1mm-0.2mm. Of course, the range of S is not limited to the above, but also S≤0.1mm, or S≥0.2mm, which is selected according to actual needs.
[0090] In this embodiment, preferably, as shown in Figures 1 to 3 the second connecting portion 32 and the body 41 are assembled to fit the mounting groove 21, which ensures the assembly accuracy and the stability of the structure after assembly. Of course, it is not limited to this, but also can be clearance fit or interference fit, etc., which is selected according to actual needs.
[0091] In this embodiment, preferably, as shown in Figures 1 to 4 , Figure 10 the mounting protrusion 42 and the mounting through hole 22 are fitted, which ensures the assembly accuracy and the stability of the structure after assembly. Of course, it is not limited to this, but also can be clearance fit or interference fit, etc., which is selected according to actual needs.
[0092] In this embodiment, preferably, as shown in Figure 1 the first connecting portion 31 and the second connecting portion 32 form an L-shaped structure, which not only ensures the cooperation with the tab cluster 51 after flattening in the horizontal direction, but also ensures the cooperation with the pole 2 in the vertical direction, which meets the assembly requirements and has a simple structure and is convenient for processing and manufacturing. Of course, it is not limited to this, but also can be selected according to actual needs.
[0093] In this embodiment, preferably, as shown in Figures 9 to 12As shown, the split plug-in type battery cell further comprises a lower plastic 6, an upper plastic, a welding ring and a sealing ring 7 and the like structure, wherein the cover plate 1 is formed with a first through hole penetrating through both sides thereof along the first preset direction a, the pole post 2 is installed in the first through hole, and the sealing ring 7 is compressed between the outer wall of the pole post 2 and the hole wall of the first through hole; the lower plastic 6 is arranged on the inner side of the cover plate 1 close to the pole group 5, and the lower plastic 6 is provided with a second through hole corresponding to the first through hole along the first preset direction a, which plays a role of avoiding the pole post 2; the welding ring is sleeved outside the pole post 2 and connected with the pole post 2 by welding; and 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 8, which is more stable and reliable, and the production efficiency is greatly improved.
[0094] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and 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 split plug-in cell, characterized by, The utility model relates to a cover plate, pole, first connecting component and second connecting component, wherein the pole is installed on the cover plate, and the pole 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 close to the pole group, and the installation through hole penetrates the outer side of the pole away from the pole group. The first connecting component comprises a first connecting part and a second connecting part, the first connecting part is connected with the tab cluster of the pole group, the second connecting component comprises a body and a mounting protruding part, and along the first preset direction, the mounting protruding part is arranged on the side of the body away from the pole group, the second connecting component has no connection relationship with the first connecting component when it is initially delivered and can be independently placed, and when assembled, the body of the second connecting component is installed on one side of the second connecting part of the first connecting component along a second preset direction, and the two are fixedly connected together. The second connecting part and the body are installed in the installation slot, the mounting protruding part is installed in the installation through hole, and along the first preset direction, the body and the second connecting part are both formed with a welding area located on the projection outside of the mounting protruding part. One of the second connecting part and the body is formed with a plug-in protruding part arranged along the second preset direction, and the other is formed with a plug-in hole, and the plug-in protruding part is detachably plugged into the plug-in hole.
2. The split plug-in cell of claim 1, wherein, The structure of the plug-in protruding part and the plug-in hole periphery is fixedly connected by riveting.
3. The split plug-in cell of claim 2, wherein, Along the first preset direction, the side of the pole away from the pole group is formed with a welding thinning area located on the periphery of the installation through hole.
4. The split plug cell of claim 1, wherein, Along the first preset direction, the depth of the welding thinning area is L1, and 0.5mm 5. The split plug-in cell of claim 4, wherein, Along the 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. Along the first preset direction, the projection of the mounting protruding part falls into the body, and the edge of the projection of the mounting protruding part abuts against the edge of the projection of the body.
6. The split plug-in cell of claim 4, wherein, Along the second preset direction, the thickness of the second connecting part is L2, and along a third preset direction, the minimum distance between the edge of the mounting protruding part and the edge of the body is L3.
7. The split plug-in cell of claim 6, wherein, Along the direction perpendicular to the first preset direction, the width of the welding thinning area is L0, and L0>L2, L0>L3; wherein the third preset direction is perpendicular to the first preset direction and the second preset direction respectively. Along the first preset direction, the projection of the mounting protruding part is elliptical, the projection of the body is rectangular, the long axis direction of the projection of the mounting protruding part is the same as the length direction of the body, and the short axis direction of the projection of the mounting protruding part is the same as the width direction of the body.
8. The split plug cell of claim 1, wherein, 9. The split plug cell of claim 1, wherein, The number of the pole groups is two, and the pole groups are sequentially stacked along the second preset direction, and the two pole groups share a pole post; the number of the first connecting members is two, and the first connecting members are respectively arranged on opposite sides of the second connecting member along the second preset direction, and the two first connecting members are respectively connected with the two pole groups one by one; and / or The second connecting part and the body are assembled to be matched with the mounting slot; and / or The mounting protruding part is matched with the mounting through hole.
10. The split plug cell of any one of claims 1 to 9, wherein, Along the first preset direction, the depth of the mounting slot is H, and 4mm<H<5mm; and / or Along the first preset direction, the height of the mounting protruding part is h, and 0.6mm<h<1.2mm; and / or Along the first preset direction, the mounting protruding part does not protrude from the pole post, and the height difference between the two is S, and 0.1mm<S<0.2mm; and / or The first connecting part and the second connecting part form an L-shaped structure; and / or The split plug-in 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 mounted 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.