Square shell battery structure
By designing a positive and negative electrode ear without bending, and by extending the square-shell battery structure connected to the plug-in half ring, the problems of wrinkles and inverted short circuits during the retraction of the pole ears in the prior art are solved, and higher overcurrent capabilities and battery capacity are achieved.
Patent Information
- Application Number
- CN202421356970.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing square shell batteries are prone to wrinkles during the retraction and folding of the electrodes, which affects the process yield. The space required for folding the electrodes is large, affecting the overall capacity of the battery, and there is a risk of inverted insertion and short circuit.
A square-shell battery structure is designed, in which the positive electrode ear and the negative electrode ear are not bent, and are connected to the plugged half ring by extending the half ring, increasing the conductive connection area, reducing the length of the ear, avoiding inverted short circuits, and separating the positive electrode column from the cover plate or the negative electrode column from the cover plate through an isolation ring.
It effectively shortens the length of the extreme ear, improves the overcurrent capability, reduces space consumption, improves the overall performance of the battery and process pass rate, and avoids the risk of inverted short circuit.
Smart Images
Figure CN222690863U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of square shell batteries, and more specifically, relates to a square shell battery structure. Background Art
[0002] At present, in the field of electric cars, square shell batteries are increasingly used as vehicle power sources due to their high volume energy density. Existing square shell batteries generally adopt the form of folding the tabs after the tabs are gathered together. The above method has the following disadvantages: the tabs are long, and wrinkles are easily formed when rolling the tabs. Folding the tabs during assembly can easily lead to short circuits due to reverse insertion of the tabs. The space required for folding the tabs is large, which affects the overall capacity of the battery. Utility Model Content
[0003] The utility model aims to provide a square shell battery structure, which can effectively shorten the length of the pole ear, avoid the risk of short circuit due to reverse insertion, and improve the current capacity.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a square shell battery structure, including a square shell battery, a positive electrode connecting piece, a negative electrode connecting piece, a positive electrode column frame, a negative electrode column frame and a cover plate, the top of the square shell battery is provided with a positive electrode ear and a negative electrode ear extending upward, the positive electrode connecting piece is provided with a first mounting opening opening downwardly for accommodating the positive electrode ear, the negative electrode connecting piece is provided with a second mounting opening opening downwardly for accommodating the negative electrode ear, the outer peripheries of the positive electrode connecting piece and the negative electrode connecting piece are respectively provided with an extending semi-ring extending upward, the two extending semi-rings have side openings arranged oppositely, a positive electrode column is provided above the positive electrode column frame, a negative electrode column is provided above the negative electrode column frame, and a plug-in semi-ring for plugging into the extending semi-ring is respectively provided below the positive electrode column frame and the negative electrode column frame, the positive electrode column and the negative electrode column frame are respectively provided with a positive electrode column and a negative electrode column respectively penetrating the cover plate, and an isolation ring is respectively sleeved on the positive electrode column and the negative electrode column, and the isolation ring is used to separate the positive electrode column from the cover plate or the negative electrode column from the cover plate.
[0005] In a possible implementation, the isolation ring includes a sealing ring sleeved on the lower periphery of the positive electrode column and the negative electrode column and an injection molding sleeve arranged on the upper periphery of the positive electrode column and the negative electrode column, and the cover plate is sleeved on the periphery of the sealing ring and the injection molding sleeve.
[0006] In a possible implementation, a lower ring plate extending toward the periphery is provided at the lower end of the sealing ring, the lower ring plate is located between the positive pole frame and the cover plate or between the negative pole frame and the cover plate, and the lower ring plate protrudes outward from the outer peripheral wall of the positive pole frame or the negative pole frame.
[0007] In some embodiments, an upper ring plate is provided on the outer periphery of the injection molding sleeve and is sealed on the cover plate, and the outer peripheral wall of the upper ring plate is flush with the outer peripheral wall of the plug-in half ring.
[0008] In a possible implementation, the outer circumferential walls of the positive electrode column and the negative electrode column are respectively provided with inwardly concave limiting grooves, and the inner circumferential wall of the injection molding sleeve is provided with a circumferentially extending limiting ring, which is used to be clamped in the limiting groove.
[0009] In a possible implementation, the height of the extended half ring is 3 mm-4 mm, and the height of the plug-in half ring is 3 mm-4 mm.
[0010] In a possible implementation, a plurality of square shell batteries are provided, and a plurality of square shell batteries are provided in turn, a plurality of first mounting ports and a plurality of second mounting ports are provided respectively, the first mounting ports are provided in one-to-one correspondence with the positive electrode ears, and the second mounting ports are provided in one-to-one correspondence with the negative electrode ears.
[0011] In a possible implementation, the positive electrode connecting sheet and the negative electrode connecting sheet are arranged at intervals, and the positive electrode column frame and the negative electrode column frame are arranged at intervals.
[0012] In a possible implementation, the heights of the positive electrode ear and the negative electrode ear are 3 mm-4 mm respectively, and the inner cavity heights of the first mounting opening and the second mounting opening are 2 mm-3 mm.
[0013] In some embodiments, the peripheral wall of the positive electrode ear and the top surface of the square shell battery have an arc-shaped transition, and the peripheral wall of the negative electrode ear and the top surface of the square shell battery have an arc-shaped transition.
[0014] The solution shown in the embodiment of the present application is compared with the prior art. The square shell battery structure provided by the embodiment of the present application has no bends in the positive and negative ears, and there is no risk of short circuit due to inverted insertion. The positive connecting piece and the positive column frame as well as the negative connecting piece and the negative column frame are connected to the plug-in half ring through an extended half ring, which increases the conductive connection area and improves the current carrying capacity. The positive and negative ears of the above-mentioned battery structure are shorter, which is convenient for improving the process qualification rate, reducing the occupied space, increasing the battery capacity, and improving the overall performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0016] Figure 1 A schematic diagram of a top view of a square shell battery structure provided in an embodiment of the utility model;
[0017] Figure 2 For the utility model embodiment Figure 1 Schematic diagram of the cross-sectional structure of AA;
[0018] Figure 3 For the utility model embodiment Figure 2 The partially enlarged structural diagram of middle Ⅰ;
[0019] Figure 4 For the utility model embodiment Figure 2 An enlarged structural diagram of the middle negative electrode connecting piece;
[0020] Figure 5 For the utility model embodiment Figure 1 A schematic diagram of the top view of the structure of the middle cover;
[0021] Figure 6 For the utility model embodiment Figure 1 A schematic diagram of the top view of the positive pole frame, negative pole frame and isolation ring;
[0022] Figure 7 For the utility model embodiment Figure 1 A schematic diagram of the top view of the positive connecting piece and the negative connecting piece;
[0023] Figure 8 For the utility model embodiment Figure 1 Schematic diagram of the top view of the medium shell battery.
[0024] Among them, the reference numerals in the figure are:
[0025] 1. Square shell battery; 11. Positive ear; 12. Negative ear; 2. Positive connecting piece; 21. First installation port; 22. Extended half ring; 23. Side opening; 3. Negative connecting piece; 31. Second installation port; 4. Positive column frame; 41. Positive column; 42. Insertion half ring; 43. Limiting groove; 5. Negative column frame; 51. Negative column; 6. Cover plate; 7. Isolation ring; 71. Sealing ring; 72. Injection molding sleeve; 73. Lower ring plate; 74. Upper ring plate; 75. Limiting ring. DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0027] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. 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 one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.
[0028] Please also read Figures 1 to 8 The square shell battery structure provided by the utility model is now described. The square shell battery structure includes a square shell battery 1, a positive electrode connecting piece 2, a negative electrode connecting piece 3, a positive electrode column frame 4, a negative electrode column frame 5 and a cover plate 6. The top of the square shell battery 1 is provided with a positive electrode ear 11 and a negative electrode ear 12 extending upward. The positive electrode connecting piece 2 is provided with a first mounting opening 21 opening downward to accommodate the positive electrode ear 11. The negative electrode connecting piece 3 is provided with a second mounting opening 31 opening downward to accommodate the negative electrode ear 12. The outer peripheries of the positive electrode connecting piece 2 and the negative electrode connecting piece 3 are respectively provided with an extending semi-ring 22 extending upward. The two extended semi-rings 22 have side openings 23 arranged opposite to each other, a positive pole column 41 is arranged above the positive pole column frame 4, a negative pole column 51 is arranged above the negative pole column frame 5, and a plug-in semi-ring 42 for plugging into the extended semi-ring 22 is respectively arranged below the positive pole column frame 4 and the negative pole column frame 5. The positive pole column 41 and the negative pole column 51 are respectively penetrated through the cover plate 6, and the positive pole column 41 and the negative pole column 51 are respectively sleeved with an isolation ring 7, which is used to separate the positive pole column 41 from the cover plate 6 or the negative pole column 51 from the cover plate 6.
[0029] The square shell battery structure provided in this embodiment is compared with the prior art. The positive pole ear 11 and the negative pole ear 12 are not bent, and there is no risk of short circuit due to reverse insertion. The positive electrode connecting piece 2 and the positive pole column frame 4 as well as the negative pole connecting piece 3 and the negative pole column frame 5 are connected to the plug-in half ring 42 through the extended half ring 22, which increases the conductive connection area and improves the current carrying capacity. The positive pole ear 11 and the negative pole ear 12 of the above-mentioned battery structure are shorter in length, which is convenient for improving the process qualification rate, reducing the occupied space, increasing the battery capacity, and improving the overall performance of the square shell battery 1.
[0030] In this embodiment, the first mounting opening 21 of the positive electrode connecting piece 2 is used to accommodate the positive electrode ear 11, and the positive electrode ear 11 can be smoothly inserted. The second mounting opening 31 of the negative electrode connecting piece 3 is used to accommodate the negative electrode ear 12, and the negative electrode ear 12 can be smoothly inserted. The positive electrode connecting piece 2 and the negative electrode connecting piece 3 are arranged at intervals, and the positive electrode column frame 4 and the negative electrode column frame 5 are arranged at intervals. The side openings 23 of the positive electrode connecting piece 2 and the negative electrode connecting piece 3 are arranged oppositely, that is, the side of the extended semi-ring 22 facing the center of the square shell battery 1 is the side opening 23. Similarly, the plug-in semi-ring 42 below the positive electrode column frame 4 and the negative electrode column frame 5 also has relatively arranged openings, and the positive electrode column frame 4 is plugged into the inner side of the extended semi-ring 22 of the positive electrode connecting piece 2 through the plug-in semi-ring 42, and the negative electrode column frame 5 is plugged into the inner side of the extended semi-ring 22 of the negative electrode connecting piece 3 through the plug-in semi-ring 42.
[0031] The extended half ring 22 has three side walls, and the plug-in half ring 42 also has three side walls. Both of them have no side walls only on one side facing the center of the square shell battery 1. The extended half ring 22 can be plugged into and matched with the plug-in half ring 42 under the positive pole column frame 4 or the negative pole column frame 5. After the extended plate is plugged into the plug-in half ring 42, they are connected by welding.
[0032] Specifically, the height of the extended semi-ring 22 is 3mm-4mm, and the height of the plug-in semi-ring 42 is 3mm-4mm. The plug-in semi-ring 42 can be plugged into the inner side of the extended semi-ring 22. After plugging, the lower end face of the plug-in semi-ring 42 is effectively in contact with the top wall of the positive electrode connecting piece 2, and the upper end face of the extended semi-ring 22 of the negative electrode connecting piece 3 is flush with the top face of the positive electrode column frame 4 or the negative electrode column frame 5, ensuring the effective flushing of the structure, which is convenient for the subsequent arrangement of components such as the isolation ring 7.
[0033] In one possible implementation, please also refer to Figures 1 to 8 The isolation ring 7 includes a sealing ring 71 sleeved on the lower periphery of the positive electrode column 41 and the negative electrode column 51 and an injection molding sleeve 72 arranged on the upper periphery of the positive electrode column 41 and the negative electrode column 51 , and the cover plate 6 is sleeved on the periphery of the sealing ring 71 and the injection molding sleeve 72 .
[0034] In this embodiment, the isolation ring 7 is in the form of a combination of a sealing ring 71 and an injection molding sleeve 72. Before installing the cover plate 6, the sealing ring 71 is installed first, and then the cover plate 6 is installed. Finally, the injection molding sleeve 72 is formed by an injection molding process to ensure effective isolation between the positive electrode column 41 and the cover plate 6, and to ensure effective isolation between the negative electrode column 51 and the cover plate 6, so as to achieve subsequent normal use of the battery.
[0035] In one possible implementation, please also refer to Figures 1 to 8 The lower end of the sealing ring 71 is provided with a lower ring plate 73 extending toward the periphery. The lower ring plate 73 is located between the positive pole column frame 4 and the cover plate 6 or between the negative pole column frame 5 and the cover plate 6. The lower ring plate 73 protrudes outward from the outer peripheral wall of the positive pole column frame 4 or the negative pole column frame 5.
[0036] In this embodiment, the top surface of the positive column frame 4 is effectively separated from the bottom surface of the cover plate 6 by setting the lower ring plate 73, forming a reliable isolation effect, ensuring the effective isolation of the positive column 41 and the negative column 51, and ensuring the stable power supply of the square shell battery 1. The lower ring plate 73 protrudes outward from the outer peripheral wall of the positive column frame 4 or the negative column frame 5, and the lower ring plate 73 of the sealing ring 71 sleeved on the positive column 41 effectively separates the top surface of the positive plate frame from the bottom surface of the cover plate 6, thereby improving the reliability of the isolation. The lower ring plate 73 of the sealing ring 71 sleeved on the negative column 51 effectively separates the top surface of the negative plate frame from the bottom surface of the cover plate 6, and also meets the above-mentioned isolation requirements.
[0037] On the basis of the above structure, the outer periphery of the injection sleeve 72 is provided with an upper ring plate 74 which is sealed on the upper part of the cover plate 6, and the outer peripheral wall of the upper ring plate 74 is flush with the outer peripheral wall of the plug-in half ring 42. During the injection molding process, the injection sleeve 72 is also injection molded with the upper ring plate 74 located above the cover plate 6, which can form an effective limit for the cover plate 6 and ensure the separation of the cover plate 6 and the positive pole 41 or the negative pole 51.
[0038] In one possible implementation, please also refer to Figures 1 to 8 The outer circumferential walls of the positive electrode column 41 and the negative electrode column 51 are respectively provided with inwardly concave limiting grooves 43 , and the inner circumferential wall of the injection sleeve 72 is provided with a circumferentially extending limiting ring 75 , which is used to be clamped in the limiting groove 43 .
[0039] In this embodiment, a limiting groove 43 is provided on the outer periphery of the positive electrode column 41 to achieve effective clamping with the upper limit ring 75 on the injection sleeve 72. The injection sleeve 72 is an injection molded component, which can improve the connection reliability with the positive electrode column 41 or the negative electrode column 51 and ensure the effective separation of the cover plate 6 and the positive electrode column 41 or the negative electrode column 51.
[0040] In one possible implementation, please also refer to Figures 1 to 8 There are several square shell batteries 1, and several square shell batteries 1 are sequentially provided with several first mounting openings 21 and second mounting openings 31, respectively. The first mounting openings 21 are arranged in one-to-one correspondence with the positive electrode ears 11, and the second mounting openings 31 are arranged in one-to-one correspondence with the negative electrode ears 12.
[0041] In this embodiment, the square-shell battery 1 is provided with multiple shells at the same time, specifically two, three or four. Correspondingly, the same number of first mounting openings 21 are provided on the positive electrode connecting sheet 2, and the same number of second mounting openings 31 are provided on the negative electrode connecting sheet 3, so as to ensure that the positive electrode connecting sheet 2 is in full contact with the multiple positive electrode ears 11, and at the same time ensure that the negative electrode connecting sheet 3 is in full contact with the multiple negative electrode ears 12.
[0042] Specifically, the peripheral wall of the positive electrode ear 11 and the top surface of the square shell battery 1 are in an arc-shaped transition, and the peripheral wall of the negative electrode ear 12 and the top surface of the square shell battery 1 are in an arc-shaped transition. The height of the positive electrode ear 11 and the negative electrode ear 12 are 3mm-4mm respectively, and the inner cavity height of the first installation opening 21 and the second installation opening 31 are both 2mm-3mm.
[0043] In the present embodiment, when the positive electrode ear 11 and the negative electrode ear 12 are formed, an arc-shaped transition area is provided at the lower part. The overall height of the positive electrode ear 11 and the negative electrode ear 12 is 3mm-4mm, and the inner cavity height of the first mounting opening 21 and the second mounting opening 31 is 2mm-3mm, which is slightly smaller than the overall height of the positive electrode ear 11 and the negative electrode ear 12. The structure can be avoided at the transition position of the house type, which is convenient for the subsequent installation of the positive electrode connecting piece 2 to the top of the positive electrode ear 11 and the negative electrode connecting piece 3 to the top of the negative electrode ear 12.
[0044] Operation process:
[0045] Install the positive electrode connecting piece 2 to the top of the positive electrode ear 11, so that the positive electrode ear 11 is inserted into the first installation hole, and install the negative electrode connecting piece 3 to the top of the negative electrode ear 12, so that the negative electrode ear 12 is inserted into the second installation hole. Install the positive electrode column frame 4 to the top of the positive electrode connecting piece 2, install the negative electrode column frame 5 to the top of the negative electrode connecting piece 3, so that the plug-in half ring 42 and the extended half ring 22 are plugged and matched, and then weld the plug-in half ring 42 and the extended half ring 22. Sleeve the sealing ring 71 to the lower periphery of the positive electrode column 41, sleeve the sealing ring 71 to the lower periphery of the negative electrode column 51, install the cover plate 6 to the top of the sealing ring 71, and use the injection molding process to form the injection sleeve 72 above the sealing ring 71 to complete the installation process of the entire square shell battery structure.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. Square shell battery structure, characterized in that: The invention comprises a square-shell battery (1), a positive electrode connecting piece (2), a negative electrode connecting piece (3), a positive electrode column frame (4), a negative electrode column frame (5) and a cover plate (6); the top of the square-shell battery (1) is provided with a positive electrode ear (11) and a negative electrode ear (12) extending upward; the positive electrode connecting piece (2) is provided with a first mounting opening (21) opening downward to accommodate the positive electrode ear (11); the negative electrode connecting piece (3) is provided with a second mounting opening (31) opening downward to accommodate the negative electrode ear (12); the outer peripheries of the positive electrode connecting piece (2) and the negative electrode connecting piece (3) are respectively provided with extending half rings (22) extending upward; the two extending half rings (22) have the same With respect to the side opening (23), a positive pole (41) is provided above the positive pole frame (4), a negative pole (51) is provided above the negative pole frame (5), and a plugging half ring (42) for plugging into the extending half ring (22) is provided below the positive pole frame (4) and the negative pole frame (5), respectively. The positive pole (41) and the negative pole (51) are respectively penetrated through the cover plate (6), and an isolation ring (7) is respectively sleeved on the positive pole (41) and the negative pole (51), and the isolation ring (7) is used to separate the positive pole (41) from the cover plate (6) or the negative pole (51) from the cover plate (6).
2. The square shell battery structure according to claim 1, characterized in that: The isolation ring (7) comprises a sealing ring (71) sleeved on the lower periphery of the positive pole (41) and the negative pole (51), and an injection molding sleeve (72) arranged on the upper periphery of the positive pole (41) and the negative pole (51), and the cover plate (6) is sleeved on the periphery of the sealing ring (71) and the injection molding sleeve (72).
3. The square shell battery structure according to claim 2, characterized in that: The lower end of the sealing ring (71) is provided with a lower ring plate (73) extending toward the periphery, and the lower ring plate (73) is located between the positive pole column frame (4) and the cover plate (6) or between the negative pole column frame (5) and the cover plate (6), and the lower ring plate (73) protrudes outward from the outer peripheral wall of the positive pole column frame (4) or the negative pole column frame (5).
4. The square shell battery structure according to claim 3, characterized in that: An upper ring plate (74) is provided on the outer periphery of the injection sleeve (72) and is sealed above the cover plate (6). The outer peripheral wall of the upper ring plate (74) is flush with the outer peripheral wall of the plug-in half ring (42).
5. The square shell battery structure according to claim 2, characterized in that: The outer peripheral walls of the positive electrode column (41) and the negative electrode column (51) are respectively provided with inwardly concave limiting grooves (43), and the inner peripheral wall of the injection molding sleeve (72) is provided with a circumferentially extending limiting ring (75), and the limiting ring (75) is used to be clamped in the limiting groove (43).
6. The square shell battery structure according to any one of claims 1 to 5, characterized in that: The height of the extending half ring (22) is 3 mm to 4 mm, and the height of the inserting half ring (42) is 3 mm to 4 mm.
7. The square shell battery structure according to any one of claims 1 to 5, characterized in that: The square shell batteries (1) are provided in plurality, and the square shell batteries (1) are provided in plurality in sequence, and the first mounting opening (21) and the second mounting opening (31) are provided in plurality respectively, and the first mounting opening (21) is provided in a one-to-one correspondence with the positive electrode ears (11), and the second mounting opening (31) is provided in a one-to-one correspondence with the negative electrode ears (12).
8. The square shell battery structure according to any one of claims 1 to 5, characterized in that: The positive electrode connecting piece (2) and the negative electrode connecting piece (3) are arranged at intervals, and the positive electrode column frame (4) and the negative electrode column frame (5) are arranged at intervals.
9. The square shell battery structure according to any one of claims 1 to 5, characterized in that: The heights of the positive electrode lug (11) and the negative electrode lug (12) are respectively 3 mm to 4 mm, and the inner cavity heights of the first mounting opening (21) and the second mounting opening (31) are both 2 mm to 3 mm.
10. The square shell battery structure according to claim 9, characterized in that: The peripheral wall of the positive electrode ear (11) and the top surface of the square-shell battery (1) have an arc-shaped transition, and the peripheral wall of the negative electrode ear (12) and the top surface of the square-shell battery (1) have an arc-shaped transition.