Adapter piece and battery comprising same
By designing the structure of stamping and die-cutting zones on the adapter, the pole ears are folded and welded to the back through the zigzag through the zigzag, solving the risk of battery cells short circuit and process complexity during the welding process, achieving low cost and high efficiency welding effect.
Patent Information
- Application Number
- CN202420574348.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-22
AI Technical Summary
During the welding process, existing adapters are prone to sinking and poking the battery cell diaphragm, increasing the risk of short circuit, and the welding process is complex and costly.
Design an adapter sheet including stamping area and die-cutting area. The body forms a stamping column in the stamping area and forms a shaped through groove in the die-cutting area. The pole ear is folded and welded to the back of the adapter sheet through the through groove to reduce welding. Space is wasted in location and simplifies welding process.
It effectively reduces the damage risk of solder joints and redundant extrusion wrinkles to the battery cell after the electrode welding, simplifies the welding process, reduces material costs, and improves welding efficiency and firmness.
Smart Images
Figure CN222146501U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of batteries, and particularly to an adapter plate and a battery including the same. Background Art
[0002] In power batteries or energy storage batteries, hard-shell square batteries or cylindrical batteries are usually used for forming modules. Among them, in hard-shell square batteries, the electrode tabs of the battery cells are usually connected to the terminal posts by adapter plates.
[0003] CN220209218U discloses a typical adapter plate, as Figure 1 shown, the above-mentioned adapter plate includes an adapter plate body and a thinned adapter plate body, the adapter plate body is connected to the thinned adapter plate body, the thinned adapter plate body is provided with a hollowed-out groove, the thinned adapter plate body is used for connecting with the terminal post assembly, and the adapter plate body is used for connecting with the electrode tab assembly. However, when this adapter plate is welded to the battery electrode tab and the terminal post, there are still the following problems: First, the electrode tab is usually welded to the lower side of the adapter plate. In this way, after the electrode tab is welded, the weld spots, redundant folds of the electrode tab, etc. are likely to sink and pierce the battery cell diaphragm, resulting in a risk of internal short circuit; Second, when the above-mentioned adapter plate is welded to the terminal post on the cover plate, it is usually welded from the inside, and the welding and flipping processes are relatively complex, resulting in more investment in process equipment and more time-consuming; Third, in the preparation process of the above-mentioned adapter plate, there are relatively many die-cutting processes, which also increases the material cost. Summary of the Utility Model
[0004] Based on this, it is necessary to provide an adapter plate and a battery including the same, which have a relatively low cost, can facilitate welding the electrode tab to the back of the adapter plate to reduce the short-circuit risk, and can simplify the welding process of the adapter plate and the terminal post.
[0005] In a first aspect, the present application provides an adapter plate, including an adapter plate body, the adapter plate body includes a die-cutting area and a stamping area connected to each other, a stamping post platform is formed on the adapter plate body in the stamping area, a plurality of through grooves are formed on the adapter plate body in the die-cutting area, the notch of the through groove is in a "C" shape, the groove wall of the through groove has opposite and parallel first side walls and second side walls, both the first side wall and the second side wall are straight walls, and the lengths of both the first side wall and the second side wall are greater than the width of the electrode tab of the battery cell.
[0006] In one embodiment, a third side wall is further formed between the first side wall and the second side wall of the through groove, and the third side wall is also a straight wall.
[0007] In one embodiment, the stamping post platform protrudes from the adapter plate body, and a stamping hole is formed on the other side of the adapter plate body of the stamping post platform, and the stamping post platform is in a cylindrical shape.
[0008] In one embodiment, the adapter plate body is an overall rectangular sheet structure.
[0009] In one embodiment, the thickness of the adapter body is 0.8 mm to 3 mm.
[0010] In one embodiment, a plurality of through grooves divide the die-cutting area of the adapter body into a plurality of tab connecting arms, and the width of each tab connecting arm is greater than 5 mm.
[0011] In one embodiment, the end surface of the stamping column away from the adapter plate body is a flat surface.
[0012] In one embodiment, the adapter plate body is further provided with a boss around the stamping column, and the protruding direction of the boss is the same as that of the stamping column;
[0013] In one embodiment, the adapter body is provided with a plurality of installation holes spaced apart from each other near its outer edge.
[0014] In a second aspect, the present application also provides a battery, comprising the adapter sheet as described in any of the above embodiments.
[0015] In one embodiment, the battery further includes a shell, a top cover and at least two battery cells, at least two battery cells are located in the shell, the top cover is connected to the shell, the adapter is located between the battery cell and the top cover, the pole tab of the battery cell is welded to the die-cutting area of the adapter, and the pole tab is welded to a side of the adapter close to the top cover, a pole is installed on the top cover, the pole is provided with a pole hole, the stamping column base of the adapter is inserted into the pole hole, and the adapter is welded to the side wall of the pole hole.
[0016] The above-mentioned adapter piece is formed with a stamping post platform in the stamping area of the adapter piece body, which enables the stamping post platform to be welded in cooperation with the corresponding post hole on the pole post. The welding position is accommodated inside the pole post, which can reduce the waste of space. By forming a number of through grooves in the die-cutting area of the adapter piece, the notch of the through groove is in the shape of a "匚", and the groove wall of the through groove has a first side wall and a second side wall that are opposite and parallel to each other. Both the first side wall and the second side wall are straight walls, and the lengths of the first side wall and the second side wall are both greater than the width of the battery cell tab, which enables the tab to be folded to the back side of the adapter piece through the through groove for welding. Since the welding position of the tab and the adapter piece is on the side facing away from the battery cell, the solder joints, redundancy, extrusion wrinkles, etc. at the tab welding position will not squeeze the battery cell due to the protection of the adapter piece itself, and thus will not puncture the battery cell, which can relatively reduce risks such as short circuits. In addition, the overall shape of the adapter piece in other embodiments of the present application is in a rectangular profile, and the through grooves also present a rectangular profile, and the die-cutting process is relatively simple and efficient. Description of the Drawings
[0017] Figure 1 Schematic structural diagram of an adapter piece in the prior art;
[0018] Figure 2 Schematic structural diagram of an adapter piece according to an embodiment of the present application;
[0019] Figure 3 Schematic structural diagram of an adapter piece according to an embodiment of the present application. Detailed Embodiments
[0020] In order to facilitate the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred implementation methods of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the implementation methods described herein. On the contrary, the purpose of providing these implementation methods is to make the disclosure of the present application more thoroughly and comprehensively understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited to the specific embodiments disclosed below. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined. It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application. The terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0021] In the first aspect, the present application provides a transfer sheet, see Figure 2 and Figure 3, the adapter piece 10 includes an adapter piece body 100. The adapter piece body 100 includes a stamping area 110 and a die-cutting area 120 that are connected. A stamping post platform 111 is formed on the adapter piece body 100 in the stamping area 110. A plurality of through grooves 121 are formed on the adapter piece body 100 in the die-cutting area 120. The notch of the through groove 121 is in a "匚" shape. The groove walls of the through groove 121 have a first side wall 1211 and a second side wall 1212 that are opposite and parallel to each other. Both the first side wall 1211 and the second side wall 1212 are straight walls. The lengths of the first side wall 1211 and the second side wall 1212 are both greater than the width of the cell tab. In this way, the straight first side wall and the second side wall ensure that the cell tab can be bent along the first side wall or the second side wall and then be easily welded to the back surface of the adapter piece. For the above-mentioned adapter piece, by forming a stamping post platform in the stamping area on the adapter piece body, the stamping post platform can be welded in cooperation with the corresponding post hole on the pole post, and the welding position is received inside the pole post, which can reduce the waste of space. By forming a plurality of through grooves in the die-cutting area on the adapter piece, the notch of the through groove is in a "匚" shape, the groove walls of the through groove have a first side wall and a second side wall that are opposite and parallel to each other, both the first side wall and the second side wall are straight walls, and the lengths of the first side wall and the second side wall are both greater than the width of the cell tab, it can make the tab be folded to the back side of the adapter piece through the through groove for welding. Since the welding position of the tab and the adapter piece is on the side facing away from the cell, the solder joints, redundancies, extrusion wrinkles, etc. at the tab welding position will not squeeze the cell due to the protection of the adapter piece itself, and thus will not puncture the cell, which can relatively reduce the risks such as short circuit. For example, the width of the cell tab is more than 3 millimeters. For example, the width of the cell tab is more than 5 millimeters.
[0022] In one embodiment, a third side wall 1213 is further formed between the first side wall 1211 and the second side wall 1212 of the through groove 121. The third side wall 1213 is also a straight wall. In this way, the die-cutting process of the through groove 121 in die-cutting is relatively simple, the production efficiency is relatively high, and the incoming material inspection is relatively simple.
[0023] In one embodiment, the stamping post platform 111 protrudes from the adapter piece body 100, and a stamping hole 112 is formed on the other side of the adapter piece body on the stamping post platform 111. The stamping post platform 111 is in a cylindrical shape. In this way, for the pole post scheme with a circular pole post hole opened on the pole post, the assembly of the stamping post platform and the pole post is relatively convenient, and the welding efficiency can also be improved.
[0024] In one of the embodiments, the adapter body 100 is a rectangular sheet structure as a whole. In other words, the adapter of the present application is processed and prepared on the adapter body 100 of rectangular sheet structure, and the adapter body presents a regular rectangular shape. Compared with the traditional Y-shaped adapter, it can reduce the generation of arc current to a certain extent and reduce the problem of heating of the adapter. Moreover, during the production process of the adapter, the raw materials cut from the traditional hollowing out will not reduce the cost of the battery manufacturer. The present application can ensure that the adapter body with a rectangular outline can also ensure the hot-melt connection between the adapter and the plastic under the cover when the mounting hole is opened on the outside of the adapter. For example, the adapter body 100 is provided with a plurality of spaced mounting holes 130 near its outer edge. The mounting holes 130 can be ultrasonically hot-melt welded with the convex columns on the lower plastic, or a gasket can be placed under the adapter, and a plastic column is set on the gasket. The plastic column passes through the mounting hole 130 and is ultrasonically hot-melt connected with the lower plastic.
[0025] In one embodiment, the thickness of the adapter body is 0.8 mm to 3 mm. For example, the thickness of the adapter body is 1.5 mm to 2 mm. In this way, the welding firmness of the adapter and the pole can be ensured, and the adapter with a thickness of more than 1.5 mm is not easy to be welded through, and can withstand laser energy with a larger energy, thereby ensuring welding firmness and adjustment space.
[0026] In one embodiment, a plurality of through grooves 121 divide the die-cutting area 120 of the adapter body 100 into a plurality of tab connecting arms 122, and the width of each tab connecting arm 122 is greater than 5 mm. In this way, the connecting arm with a width of more than 5 mm can ensure that a tab of a battery cell is welded on both sides of the tab connecting arm 122. The number of through grooves in the present application is more than one, for example, 1, 2, 3, etc. For example, an anti-mistake position 122 is also provided on one of the tab connecting arms 122 located on the outside, and the anti-mistake position 122 is used to ensure that the adapter is not easily inserted in reverse when mating with the top cover.
[0027] In one embodiment, the end surface of the stamping column 111 away from the adapter body 100 is a flat surface. For example, the adapter body 100 is further provided with a boss 112 around the stamping column 111, and the protrusion direction of the boss 112 is the same as the protrusion direction of the stamping column 111; in this way, the adapter with the boss 112 can further increase the protrusion height of the stamping column 111, ensure the welding of the stamping column and the pole, and also ensure the mechanical fit between the boss and the pole, thereby improving the electric current carrying capacity.
[0028] The above-mentioned adapter piece is formed with a stamping post platform in the stamping area of the adapter piece body, which enables the stamping post platform to be welded in cooperation with the corresponding post holes on the pole post. The welding position is accommodated inside the pole post, which can reduce the waste of space. By forming a plurality of through grooves in the die-cutting area of the adapter piece, the notch of the through groove is in the shape of a "匚", the groove walls of the through groove have opposite and parallel first side walls and second side walls, both the first side wall and the second side wall are straight walls, and the lengths of the first side wall and the second side wall are both greater than the width of the cell tab, which enables the tab to be folded to the back side of the adapter piece through the through groove for welding, ensuring that the welding position of the tab and the adapter piece is located on the side facing away from the cell. Therefore, the solder joints, redundancy, extrusion wrinkles, etc. at the welding position of the tab will not squeeze the cell due to the protection of the adapter piece itself, and thus will not pierce the cell, which can relatively reduce risks such as short circuits.
[0029] In a second aspect, the present application further provides a battery, including the adapter piece described in any of the above embodiments.
[0030] In one of the embodiments, the battery further includes a housing, a top cover and at least two cells. The at least two cells are located inside the housing. The top cover is connected to the housing. The adapter piece is located between the cells and the top cover. The tabs of the cells are welded to the die-cutting area of the adapter piece, and the tabs are welded to the side of the adapter piece close to the top cover. A pole post is installed on the top cover. The pole post is provided with a post hole penetrating in the height direction of the pole post. The stamping post platform of the adapter piece is inserted into the post hole, and the adapter piece is welded to the side wall of the post hole.
[0031] The above-mentioned battery adopts the above-mentioned adapter piece. By forming a stamping post platform in the stamping area of the adapter piece body, it enables the stamping post platform to be welded in cooperation with the corresponding post holes on the pole post. The welding position is accommodated inside the pole post, which can reduce the waste of space. By forming a plurality of through grooves in the die-cutting area of the adapter piece, the notch of the through groove is in the shape of a "匚", the groove walls of the through groove have opposite and parallel first side walls and second side walls, both the first side wall and the second side wall are straight walls, and the lengths of the first side wall and the second side wall are both greater than the width of the cell tab, which enables the tab to be folded to the back side of the adapter piece through the through groove for welding, ensuring that the welding position of the tab and the adapter piece is located on the side facing away from the cell. Therefore, the solder joints, redundancy, extrusion wrinkles, etc. at the welding position of the tab will not squeeze the cell due to the protection of the adapter piece itself, and thus will not pierce the cell, which can relatively reduce risks such as short circuits.
[0032] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. It should be noted that "in one embodiment", "for example", "for example", etc. in this application are intended to illustrate the present application, rather than to limit the present application. The above-described embodiments only express several implementation methods of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent application. It should be pointed out that for a person of ordinary skill in the art, without departing from the concept of the present application, several variations and improvements can also be made, which all belong to the scope of protection of the present application. Therefore, the scope of protection of the patent in this application shall be subject to the attached claims.
Claims
1. A transfer sheet, characterized in that: It includes a connecting piece body. The connecting piece body includes a die-cutting area and a stamping area which are connected. A stamping column platform is formed on the connecting piece body in the stamping area. A plurality of through grooves are formed on the connecting piece body in the die-cutting area. The notch of the through groove is in a "匚" shape. The groove wall of the through groove has a first side wall and a second side wall which are opposite and parallel to each other. Both the first side wall and the second side wall are straight walls. The lengths of the first side wall and the second side wall are both greater than the width of the electrode tab of the battery cell.
2. The adapter according to claim 1, characterized in that: A third side wall is further formed between the first side wall and the second side wall of the through groove. The third side wall is also a straight wall.
3. The adapter according to claim 1, characterized in that: The stamping column platform protrudes from the connecting piece body, and a stamping hole is formed on the other side of the connecting piece body of the stamping column platform. The stamping column platform is in a cylindrical shape.
4. The adapter according to claim 3, characterized in that: The connecting piece body is in an overall rectangular sheet structure.
5. The adapter according to claim 4, characterized in that: The thickness of the connecting piece body is 0.8 millimeters to 3 millimeters.
6. The adapter according to claim 5, characterized in that: The plurality of through grooves divide the die-cutting area of the connecting piece body into several electrode tab connecting arms at intervals. The width of each electrode tab connecting arm is more than 5 millimeters.
7. The adapter according to claim 1, characterized in that: The end face of the stamping column platform away from the connecting piece body is a flat surface.
8. The adapter according to claim 1, characterized in that: A boss is further protrudingly formed on the connecting piece body around the stamping column platform. The protruding direction of the boss is the same as the protruding direction of the stamping column platform. And / or, a plurality of spaced mounting holes are formed on the connecting piece body near its outer edge position.
9. A battery, characterized in that: It includes the connecting piece as described in any one of claims 1 to 8.
10. The battery according to claim 9, characterized in that The battery further includes a housing, a top cover and at least two battery cells. The at least two battery cells are located in the housing. The top cover is connected to the housing. The connecting piece is located between the battery cells and the top cover. The electrode tab of the battery cell is welded to the die-cutting area of the connecting piece, and the electrode tab is welded to the side of the connecting piece close to the top cover. A pole column is installed on the top cover. The pole column is provided with a pole column hole. The stamping column platform of the connecting piece is inserted into the pole column hole, and the connecting piece is welded to the side wall of the pole column hole.