Battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery which comprises a pole shank, a shell and an insulating isolation ring, and the pole shank is sleeved with the insulating isolation ring; the number of the shells is two, the two shells are respectively buckled at two ends of the pole core, and the two shells are respectively connected with two sides of the insulating isolation ring, so that the two shells are arranged in an insulating manner; along the first preset direction, the positive tab at one end of the pole core is connected with one shell, and the negative tab at the other end of the pole core is connected with the other shell. According to the light-weight battery structure provided by the invention, structures such as a pole column and a collector plate are removed, the two shells are directly connected with the pole lugs of the pole core to serve as output, and the insulating isolating ring is adopted for isolation, so that the short circuit problem is avoided, the assembly efficiency is greatly improved, the manufacturing process of the battery is shortened, the yield of products is improved, and the production cost is reduced. And moreover, the investment of parts is reduced, and the cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery. BACKGROUND

[0002] At present, cylindrical batteries occupy a certain proportion in the new energy industry, and are known for high automation degree, high production efficiency and good consistency. Nowadays, there are problems such as low assembly yield and efficiency, and no cost advantage of structural parts in general large cylindrical batteries. At present, during assembly of the large cylindrical battery, the pole core is first welded with the current collector disc of one electrode outside the shell, then enters the shell, and then is welded with another electrode, and finally the current collector disc is bent and welded with the cover. This process is relatively complex and lengthy, resulting in low assembly efficiency and low space utilization. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a battery which solves the technical problems of the prior art that the pole core is first welded with the current collector disc of one electrode outside the shell during assembly of the large cylindrical battery, then enters the shell, and then is welded with another electrode, and finally the current collector disc is bent and welded with the cover. This process is relatively complex and lengthy, resulting in low assembly efficiency and low space utilization.

[0004] The present application provides a battery, comprising: a pole core, a shell and an insulating isolation ring; wherein the insulating isolation ring is sleeved on the outside of the pole core; the number of the shell is two, and is respectively buckled on both ends of the pole core, and one of the shells is connected with one side of the insulating isolation ring, and the other shell is connected with the other side of the insulating isolation ring, so that the two shells are insulated; along a first predetermined direction, a positive electrode lug at one end of the pole core is connected with one of the shells, and a negative electrode lug at the other end of the pole core is connected with the other shell.

[0005] In the above technical solution, further, along the first predetermined direction, one end of at least one of the two shells is a mounting end, and the mounting end is formed with a limiting groove recessed toward the side of the pole core, so that a height difference is formed between the highest point and the lowest point of the mounting end.

[0006] In any of the above technical solutions, further, the side area of the limiting groove is a protruding portion away from the side of the pole core, at least one recessed portion is formed on at least one protruding portion on at least one of the shells, and a liquid injection hole is formed on the recessed portion.

[0007] In any of the above technical solutions, further, the bottom wall of the limiting groove close to the side of the pole core is arranged along a direction perpendicular to the first predetermined direction, and the bottom wall of the limiting groove extends along a second predetermined direction and a third predetermined direction.

[0008] In any of the above technical solutions, further, along the first preset direction, the bottom wall of the limiting groove abuts against the corresponding positive tab or negative tab.

[0009] In any of the above technical solutions, further, the limiting groove is annularly arranged.

[0010] In any of the above technical solutions, further, at least one edge of the groove bottom of at least one limiting groove is provided with an anti-explosion notch.

[0011] In any of the above technical solutions, further, the anti-explosion notch is a closed circular line, and the diameter of the anti-explosion notch is the diameter of the pole core is and

[0012] In any of the above technical solutions, further, one of the insulating isolation ring and the shell is formed with a mounting groove, the other is formed with a mounting protrusion, and the mounting protrusion is arranged in the mounting groove.

[0013] In any of the above technical solutions, further, the mounting groove is formed on the inner side of the insulating isolation ring or the shell close to the pole core, and the cross section along the first preset direction is L-shaped.

[0014] In any of the above technical solutions, further, the positive tab at one end of the pole core is connected to one of the shells by welding.

[0015] In any of the above technical solutions, further, the negative tab at the other end of the pole core is connected to the other of the shells by welding.

[0016] In any of the above technical solutions, further, the shell and the insulating isolation ring are connected by welding.

[0017] In any of the above technical solutions, further, the material of the insulating isolation ring is quartz, borosilicate or tempered glass.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The application provides a light-weight battery structure, which removes structures such as pole columns and current collecting plates, directly adopts two shells to be connected with pole tabs of a pole core, serves as output, and adopts an insulating isolation ring to perform insulating isolation, so that short circuit problems are avoided, safety and reliability are higher, the above structure greatly improves assembly efficiency, shortens a manufacturing process of the battery, improves a yield of products, reduces input of parts, and greatly reduces cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed to be used in the specific embodiments or prior art description 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.

[0021] Figure 1 An exploded view of the battery provided by the embodiment of the present application;

[0022] Figure 2 An assembly view of the battery provided by the embodiment of the present application;

[0023] Figure 3 Another assembly view of the battery provided by the embodiment of the present application;

[0024] Figure 4 A sectional view of the battery provided by the embodiment of the present application;

[0025] Figure 5 A structure schematic view of the first shell provided by the embodiment of the present application; Figure 4 A structure schematic view of the first shell provided by the embodiment of the present application;

[0026] Figure 6 A structure schematic view of the first shell provided by the embodiment of the present application; Figure 4 A structure schematic view of the first shell provided by the embodiment of the present application;

[0027] Figure 7 A structure schematic view of the first shell provided by the embodiment of the present application; Figure 4 A structure schematic view of the first shell provided by the embodiment of the present application;

[0028] Figure 8 A structure schematic view of the first shell provided by the embodiment of the present application;

[0029] Figure 9 Another structure schematic view of the first shell provided by the embodiment of the present application;

[0030] Figure 10 A sectional view of the first shell provided by the embodiment of the present application;

[0031] Figure 11 A structure schematic view of the second shell provided by the embodiment of the present application;

[0032] Figure 12 Another structural schematic view of the second shell provided for the embodiment of the present application;

[0033] Figure 13 A sectional view of the second shell provided for the embodiment of the present application;

[0034] Figure 14 A structural schematic view of the insulation isolation ring provided for the embodiment of the present application;

[0035] Figure 15 Another structural schematic view of the insulation isolation ring provided for the embodiment of the present application;

[0036] Figure 16 A structural schematic view of the fracture of the insulation isolation ring provided for the embodiment of the present application.

[0037] Reference signs:

[0038] 1-pole core, 11-positive electrode lug, 12-negative electrode lug, 2-shell, 21-first shell, 22-second shell, 23-assembly end, 231-limiting groove, 2311-supporting part, 2312-bottom wall, 232-protruding part, 233-recessed part, 234-liquid injection hole, 235-explosion-proof notch, 24-mounting protruding part, 3-insulation isolation ring, 31-mounting groove. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0040] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0041] 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.

[0042] 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 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.

[0043] 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, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The following refers to Figures 1 to 16 A battery according to some embodiments of the present application is described.

[0045] Referring to Figures 1 to 16 As shown, the embodiments of the present application provide a battery, comprising: a core 1, a shell 2 and an insulating isolation ring 3; wherein the insulating isolation ring 3 is sleeved outside the core 1; the number of the shell 2 is two, and is respectively buckled at both ends of the core 1, and one of the shell 2 is connected with one side of the insulating isolation ring 3, and the other shell 2 is connected with the other side of the insulating isolation ring 3, so that the two shells 2 are insulated; along a first predetermined direction a, the positive electrode lug 11 at one end of the core 1 is connected with one of the shell 2, and the negative electrode lug 12 at the other end of the core 1 is connected with the other shell 2.

[0046] According to the above described structure, the present application provides a light weight battery structure, which removes the structure of the pole, the current collecting disc and the like, directly uses two shells 2 to connect with the pole lug of the core 1 as output, and uses the insulating isolation ring 3 for insulation isolation, avoids the occurrence of short circuit problem, is more safe and reliable, and the above structure greatly improves the assembly efficiency, shortens the manufacturing process of the battery, improves the yield of the product, reduces the investment of parts, and greatly reduces the cost.

[0047] Further, preferably, the first predetermined direction a, the height direction of the core 1 and the height direction of the shell 2 are all the same.

[0048] Further, preferably, the positive tab 11 at one end of the pole core 1 is connected to one of the shells 2 by welding, ensuring the stability and firmness after connection, and simple and convenient operation, high production efficiency.

[0049] Further, preferably, the negative tab 12 at the other end of the pole core 1 is connected to the other shell 2 by welding, ensuring the stability and firmness after connection, and simple and convenient operation, high production efficiency. It should be noted that in the following text, in order to distinguish between the two shells 2, they are respectively named as the first shell 21 and the second shell 22, wherein the first shell 21 is connected to the positive tab 11 of the pole core 1, and the second shell 22 is connected to the negative tab 12 of the pole core 1, which will be described in the following text. Of course, it is not limited to this, the first shell 21 can also be connected to the negative tab 12 of the pole core 1, and the second shell 22 is connected to the positive tab 11 of the pole core 1, which is selected according to actual needs.

[0050] In this embodiment, preferably, as shown in Figure 5 、 Figure 6 、 Figure 9 、 Figure 10 、 Figure 12 and Figure 13 , along the first preset direction a, the ends of the two shells 2, i.e. the first shell 21 and the second shell 22, away from each other are both assembly ends 23, and the assembly end 23 is formed with a limiting recess 231 recessed towards the side of the pole core 1, so that there is a height difference between the highest point and the lowest point of the assembly end 23.

[0051] According to the structure described above, taking the first shell 21 as an example, the top end of the shell 2 is provided with a recessed structure, so that there is a certain height difference between the top end of the shell 2 itself. In this way, there is always a height difference between the end of the pole core 1 and the highest point of the top end of the shell 2, so that during use of the battery cell, if internal gas is generated, the pole core 1 will move upward, but because the limiting recess 231 recessed towards the side of the pole core 1 is provided, the side wall of the limiting recess 231, i.e. the supporting part 2311 and the bottom wall 2312, play a role in blocking the pole core 1, especially the side wall of the limiting recess 231, i.e. the supporting part 2311, presses down the pole core 1, playing a limiting role, and the pole core 1 is blocked inside the shell 2, which is more safe and reliable.

[0052] Further, preferably, the limiting recess 231 is of a ring structure, and preferably, the number of the limiting recess 231 is one, and the area within the boundary of the limiting recess 231 forms a protruding structure, i.e. a protruding part 232.

[0053] It should be noted that the design of the limiting groove 231 and the protruding portion 232 is not limited to the above, for example, when the limiting groove 231 is in a ring structure, the number thereof is not limited to one, but can be greater than one, for example, two or three, and the plurality of limiting grooves 231 are concentrically arranged; in addition, the limiting groove 231 is not limited to a ring structure, but can be a part of a ring structure, and is preferably sequentially arranged along the circumference with the center line of the pole core 1 as the center, or the limiting groove 231 is a groove of other shapes, which is uniformly arranged on the assembly end 23, and of course, can be randomly distributed, which is specifically selected according to actual needs.

[0054] In this embodiment, as shown in Figure 5 、 Figure 9 and Figure 10 preferably, the protruding portion 232 on the intermediate region of the first shell 21 is formed with a recessed portion 233, and the liquid injection hole 234 is arranged on the recessed portion 233.

[0055] According to the structure described above, the liquid injection hole 234 is at a certain height difference from the pole core 1, and is not easily blocked by the pole core 1 during liquid injection, and has high liquid injection efficiency, and the liquid injection hole 234 is arranged on the recessed portion 233, which plays a role in preventing overflow, in addition, the recessed portion 233 itself forms a structure of a boss on the outside, which can be used as a welding point with a busbar or other structural member outside the battery, and also plays a role in supporting the busbar or other structural member.

[0056] It should be noted that the liquid injection hole 234 is not limited to being arranged on the recessed portion 233, but can be removed from the recessed portion 233, and directly arranged on the protruding portion 232, which is specifically selected according to actual needs.

[0057] In addition, it should be noted that in this embodiment, the liquid injection hole 234 is only arranged on the first shell 21, and the second shell 22 is not arranged with the liquid injection hole 234, of course, it is not limited to this, but can only be arranged on the second shell 22, or the liquid injection hole 234 is arranged on the first shell 21 and the second shell 22 at the same time, which is specifically designed according to actual needs.

[0058] In this embodiment, as shown in Figure 9 preferably, the bottom wall 2312 of the limiting groove 231 close to the pole core 1 is arranged along a direction perpendicular to the first preset direction a, and the bottom wall 2312 of the limiting groove 231 extends along the second preset direction b and the third preset direction c.

[0059] According to the structure described above, the bottom wall 2312 of the limiting groove 231 is a plane with a certain size, so that the bottom wall 2312 of the limiting groove 231 can be used as an area for welding with the tab of the pole core 1, which is convenient to operate and facilitates heat dissipation. At the same time, the space utilization of the structure is high, thereby the compression amount of the tab after stacking can be appropriately reduced, so that the tab retains a certain thickness, thereby avoiding burning the plastic material in the pole core 1. It should be noted that the tab referred to herein and in the foregoing and subsequent description refers to the positive tab 11 or the negative tab 12 corresponding to the limiting groove 231, which is not specially distinguished here and is collectively referred to as a tab.

[0060] Further, preferably, when the limiting groove 231 is an annular groove, the bottom wall 2312 and the side wall, i.e. the support part 2311, are also annular structures, that is, the welding area of the shell 2 with the tab of the pole core 1 is also an annular area. Of course, it is not limited to this, and the welding area changes with the change of the shape of the bottom wall 2312 of the limiting groove 231.

[0061] Further, preferably, the second predetermined direction b is the radial direction of the pole core 1, and the third predetermined direction c is the direction of the circular ring with the center of the pole core 1 as the center. Of course, it is not limited to this, and can be designed according to actual needs, for example: the assembly end 23 can also be a non-circular structure, the assembly end 23 can also be a square structure, the second predetermined direction b can also be the length direction or the width direction, and the third predetermined direction c can also be the width direction or the length direction.

[0062] Further, preferably, along the first predetermined direction a, the cross section of the limiting groove 231 is a trapezoidal groove. Of course, it is not limited to this, for example: the limiting groove 231 can also be a dovetail groove, or other shaped grooves, which are designed according to actual needs.

[0063] It should be noted that the structure of the bottom wall 2312 of the limiting groove 231 is not limited to the above, and the bottom wall 2312 can also be a linear structure, that is, along the first predetermined direction a, the cross section of the limiting groove 231 can be a V-shaped groove.

[0064] In this embodiment, preferably, as shown in Figure 5 along the first predetermined direction a, the bottom wall 2312 of the limiting groove 231 abuts against the corresponding positive tab 11 or negative tab 12, that is, the bottom wall 2312 of the limiting groove 231 on the first shell 11 abuts against the positive tab 11, and the bottom wall 2312 of the limiting groove 231 on the second shell 11 abuts against the negative tab 12, so that the bottom wall 2312 of the limiting groove 231 is convenient for welding with the tab, and also plays a role in fixing the pole core 1, avoiding the pole core 1 from moving, and improving the reliability of the structure.

[0065] It needs to be explained that: along the first preset direction a, the bottom wall 2312 of the limiting groove 231 and the corresponding positive electrode lug 11 or negative electrode lug 12 can also form a certain gap, which is specifically selected according to actual needs.

[0066] In this embodiment, preferably, as shown in Figure 5 、 Figure 9 and Figure 12 , one side edge of the bottom wall 2312 of the limiting groove 231 away from the protruding part 232 is provided with an anti-explosion notch 235, so that when the internal gas pressure of the battery cell is large, the bottom wall 2312 of the limiting groove 231 will move upward, and it is easier to break and release pressure at the anti-explosion notch 235, and when the structure inside the anti-explosion notch 235 completely falls off, the core 1 is blocked in the shell by the side wall of the limiting groove 231, i.e. the supporting part 2311, to avoid flying out and affecting the adjacent battery cell.

[0067] In this embodiment, preferably, as shown in Figure 5 , the anti-explosion notch 235 is circular, and the diameter of the anti-explosion notch 235 is The diameter of the core 1 is and

[0068] According to the structure described above, the diameter of the anti-explosion notch 235 is smaller than the diameter of the core 1, so that when the end structure of the shell 2 falls off along the anti-explosion notch 235, the side wall of the limiting groove 231, i.e. the supporting part 2311, located outside the anti-explosion notch 235 can always be pressed on the top of the core 1, thereby playing a limiting role on the core 1, avoiding the core 1 from being ejected, and greatly improving the safety and reliability.

[0069] Further, preferably, in this embodiment, the anti-explosion notch 235 is only one, of course, not limited to this, but also more than one, for example, two or three, etc., that is, for one limiting groove 231 in this embodiment, the anti-explosion notch 235 can also be provided at both circular edge lines of the bottom wall 2312, and when the number of limiting grooves 231 is more than one, one or more limiting grooves 231 can be selected to provide the anti-explosion notch 235.

[0070] In this embodiment, preferably, as shown in Figure 7 、 Figure 8 、 Figure 11 、 Figures 14 to 16 , the insulating isolation ring 3 is formed with a mounting groove 31, the shell 2 is formed with a mounting protrusion 24, and the mounting protrusion 24 is arranged in the mounting groove 31, of course, not limited to this, but also can be provided with a groove on the shell 2, and a mounting protrusion 24 on the insulating isolation ring 3.

[0071] According to the structure described above, through the cooperation of the mounting protrusion 24 and the mounting groove 31, the insulating isolation ring 3 and the shell 2 are assembled more firmly and stably, and the assembly precision and efficiency are improved.

[0072] It should be noted that the mounting protrusion 24 and the mounting groove 31 can also not be provided on the insulating isolation ring 3 and the shell 2, that is, the two are matched with flat end faces, and the specific selection is based on actual needs.

[0073] In this embodiment, as shown in Figures 14 to 16 , the mounting groove 31 is formed on the inner side of the insulating isolation ring 3 close to the pole core 1, and the cross section along the first preset direction a is L-shaped.

[0074] According to the structure described above, the mounting groove 31 is provided on the inner side of the insulating isolation ring 3, so that the assembly area thereof is hidden inside, the appearance is more beautiful, the gap is smaller, and the sealing performance is improved.

[0075] In this embodiment, preferably, the shell 2 and the insulating isolation ring 3 are connected by welding, and the structure at the connection is more firm and stable, and the operation is simple and convenient. Of course, the shell 2 and the insulating isolation ring 3 can also be connected by gluing and the like.

[0076] In this embodiment, preferably, the material of the insulating isolation ring 3 is quartz, borosilicate or tempered glass, which has insulation performance and certain strength, and has good support effect.

[0077] In this embodiment, as shown in Figure 2 , Figure 3 , Figures 8 to 16 , the insulating isolation ring 3 is a circular ring, and the two shells 2 are circular shells 2 with an open end, which are matched with the cylindrical pole core 1. Of course, the shape of the insulating isolation ring 3 and the shell 2 can also be designed according to actual needs, for example, the shell 2 can also be provided as a square shell 2, and correspondingly, the insulating isolation ring 3 is provided as a square ring.

[0078] In this embodiment, preferably, the materials of the first shell 21 and the second shell 22 are metal materials, such as aluminum alloy, copper alloy and stainless steel.

[0079] 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 battery, characterized by, The application relates to a battery, which comprises a pole core, a shell and an insulating isolation ring; the insulating isolation ring is sleeved on the outside of the pole core; the number of the shells is two, and the two shells are respectively buckled on the two ends of the pole core; one of the shells is connected with one side of the insulating isolation ring, and the other shell is connected with the other side of the insulating isolation ring, so that the two shells are insulated; along a first preset direction, the positive pole lug at one end of the pole core is connected with one of the shells, and the negative pole lug at the other end of the pole core is connected with the other shell. Along the first preset direction, one end of at least one of the shells is an assembly end, and the assembly end is formed with a limiting recess which is recessed towards the side of the pole core, so that a height difference is formed between the highest point and the lowest point of the assembly end.

2. The battery of claim 1, wherein, The side area of the limiting recess is a protruding part which is away from the side of the pole core, at least one protruding part on at least one of the shells is formed with a recess, and the recess is provided with a liquid injection hole; and / or 3. The battery of claim 2, wherein, The bottom wall of the limiting recess which is close to the side of the pole core is arranged along a direction which is perpendicular to the first preset direction, and the bottom wall of the limiting recess extends along a second preset direction and a third preset direction; and / or Along the first preset direction, the bottom wall of the limiting recess abuts against the corresponding positive pole lug or negative pole lug; and / or The limiting recess is arranged in a ring shape. At least one edge of the groove bottom of at least one of the limiting recesses is provided with an anti-explosion notch.

4. The battery of claim 2, wherein, One of the insulating isolation ring and the shell is formed with a mounting recess, and the other is formed with a mounting protruding part, and the mounting protruding part is arranged in the mounting recess.

5. The battery of claim 4, wherein, The anti-explosion score is a closed circular line, and the diameter of the anti-explosion score is The diameter of the pole core is and 6. The battery of claim 1, wherein, The mounting recess is formed on the inner side of the insulating isolation ring or the shell which is close to the pole core, and the cross section along the first preset direction is in an L shape.

7. The battery of claim 6, wherein, The positive pole lug at one end of the pole core is connected with one of the shells by welding; and / or 8. The battery of claim 1, wherein, The negative pole lug at the other end of the pole core is connected with the other shell by welding. The shell and the insulating isolation ring are connected by welding.

9. The battery of claim 8, wherein, The material of the insulating isolation ring is quartz, borosilicate or tempered glass.

10. The battery of any one of claims 1 to 9, wherein, ​

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