Interpenetration type battery top cover structure and battery

Abstract

The utility model provides a penetrating type battery top cover structure and a battery, and belongs to the field of lithium batteries. The structure comprises a battery cell, a tab, a top cover, a lower pole plate, an upper pole plate and a sealing structure, the tab is arranged at the top of the battery cell, the lower pole plate is arranged above the battery cell, a first mounting hole matched with the tab is formed in the lower pole plate, the tab penetrates through the first mounting hole to be bent and then is welded with the lower pole plate, and the sealing structure is arranged on the top of the top cover. The top cover covers the battery cell and the lower pole plate, a second mounting hole is formed in the top cover, the upper pole plate comprises a first pole plate parallel to the lower pole plate and a second pole plate perpendicular to the lower pole plate, and the second pole plate penetrates through the second mounting hole and is connected with the lower pole plate; and the sealing structure is arranged between the top cover and the battery cell as well as between the lower pole plate and the upper pole plate. By adopting the interpenetrating type battery top cover structure and the battery provided by the embodiment of the utility model, the problem of internal short circuit caused by inward insertion of the tabs in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to an intercalated battery top cover structure and a battery. Background Art

[0002] With the rapid development of lithium batteries, the safety and stability of lithium batteries have also received widespread attention.

[0003] In the prior art, the connection method between the lithium battery pole tab and the top cover pole is mainly to weld the pole tab to the adapter plate, and then weld the adapter plate to the pole. In this process, the connecting plate occupies the battery space, and the cost is high while increasing the internal resistance of the battery cell.

[0004] The top cover structure of lithium batteries in the prior art involves bending after the tabs are welded. Bending also occupies the internal height space of the battery cell and there is a risk of internal short circuit caused by the tabs being inserted. Utility Model Content

[0005] The embodiment of the utility model provides an intercalated battery top cover structure, which can solve the problem of internal short circuit caused by internal insertion of the tab in the prior art. The technical solution is as follows:

[0006] In a first aspect, an intercalated battery top cover structure includes: a battery cell, a tab, a top cover, a lower pole plate, an upper pole plate and a sealing structure,

[0007] The pole ear is arranged on the top of the battery cell, the lower pole plate is arranged above the battery cell, a first mounting hole matching the pole ear is opened on the lower pole plate, the pole ear penetrates the first mounting hole, is bent, and then is welded to the lower pole plate.

[0008] The top cover is arranged above the battery cell and the lower pole plate, a second mounting hole is opened on the top cover, the upper pole plate includes a first pole plate parallel to the lower pole plate and a second pole plate perpendicular to the lower pole plate, the second pole plate is passed through the second mounting hole and connected to the lower pole plate, and the sealing structure is arranged between the top cover and the battery cell, the lower pole plate and the upper pole plate.

[0009] Optionally, the sealing structure includes an upper plastic, a lower plastic and a sealing ring, the lower plastic is arranged between the top cover and the battery cell, the upper plastic is arranged between the upper pole plate and the top cover, the sealing ring is arranged at the connection between the upper pole plate and the lower pole plate, and the two ends of the sealing ring are respectively abutted against the upper plastic and the lower plastic.

[0010] Optionally, a third mounting hole is opened on the upper pole plate, and a cap is provided on the third mounting hole.

[0011] Optionally, the cap is flush with the first pole plate.

[0012] Optionally, a filling piece is provided between the cap and the lower pole plate.

[0013] Optionally, a rubber ring is provided in the first mounting hole, and the tab is inserted into the rubber ring.

[0014] Optionally, a plurality of the pole ears are provided, and a plurality of the first mounting holes are correspondingly provided.

[0015] In a second aspect, a battery includes the aforementioned intercalated battery top cover structure and also includes a shell, wherein the shell is a box-shaped structure with an opening at the top, the top cover is arranged on the opening, and the battery cell is arranged in the shell.

[0016] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0017] An interpenetrating battery top cover structure and a battery provided by an embodiment of the utility model, by setting a lower pole plate, extending the pole ear from the top of the battery cell to the outside of the battery cell and welding it to the lower pole plate, so that the pole ear is firmly fixed on the outside of the battery cell, and then connected to the lower pole plate through the upper pole plate, so that the external electrical equipment is connected to the upper pole plate for charging and discharging. Compared with the traditional technology of bending the pole ear toward the inside of the battery cell and setting a connecting piece to be connected to the pole plate, the interpenetrating battery top cover structure provided by an embodiment of the utility model does not need to bend the pole ear toward the inside of the battery cell, and can effectively solve the problem of internal short circuit caused by internal insertion of the pole ear in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments 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 creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of a battery provided by an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall cross-section of a battery provided by an embodiment of the utility model;

[0021] Figure 3 The utility model embodiment provides Figure 2 A magnified schematic diagram of point A;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the lower pole plate provided by an embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the top cover provided by an embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the upper pole plate provided in an embodiment of the utility model.

[0025] In the figure: 1-battery cell; 2-ear; 3-top cover; 4-lower pole plate; 41-first mounting hole; 42-rubber ring; 43-welding hole; 5-upper pole plate; 51-first pole plate; 52-second pole plate; 53-third mounting hole; 6-sealing structure; 61-upper plastic; 62-lower plastic; 63-sealing ring; 7-cap; 8-filler; 9-housing. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of a battery provided by an embodiment of the utility model; Figure 2 It is a schematic diagram of the overall cross-section of a battery provided by an embodiment of the utility model; Figure 3 The utility model embodiment provides Figure 2 A magnified schematic diagram of point A; Figure 4 It is a schematic diagram of the cross-sectional structure of the lower pole plate provided by an embodiment of the utility model; Figure 5 It is a schematic diagram of the cross-sectional structure of the top cover provided by an embodiment of the utility model; Figure 6 Schematic diagram of the cross-sectional structure of the upper pole plate provided by the embodiment of the utility model. Figures 1 to 6 A plug-in battery top cover structure is shown, comprising: a battery cell 1, a pole ear 2, a top cover 3, a lower pole plate 4, an upper pole plate 5 and a sealing structure 6, wherein the pole ear 2 is arranged on the top of the battery cell 1, the lower pole plate 4 is arranged above the battery cell 1, a first mounting hole 41 matching the pole ear 2 is opened on the lower pole plate 4, the pole ear 2 penetrates the first mounting hole 41, is bent and then welded to the lower pole plate 4, the top cover 3 is arranged above the battery cell 1 and the lower pole plate 4, a second mounting hole 31 is opened on the top cover 3, the upper pole plate 5 comprises a first pole plate 51 parallel to the lower pole plate 4 and a second pole plate 52 perpendicular to the lower pole plate 4, the second pole plate 52 is penetrated through the second mounting hole 31 and connected to the lower pole plate 4, and the sealing structure 6 is arranged between the top cover 3 and the battery cell 1, the lower pole plate 4 and the upper pole plate 5.

[0028] Exemplarily, in the embodiment of the utility model, the positive and negative electrodes of the battery top cover structure are of the same structure, and a welding hole 43 matching the second pole plate 52 is provided on the lower pole plate 4, and the welding hole 43 is located outside the first mounting hole 41. The pole lug 2 extends from the top of the battery cell 1. When assembling the structure, the lower pole plate 4 is placed above the battery cell 1, and the pole lug 2 is passed through the first mounting hole 41 and then welded to the lower pole plate 4. After the sealing structure 6 is placed above the battery cell 1, the top cover 3 is placed above the battery cell 1. At this time, the sealing structure 6 is in the second mounting hole 31 and wraps the top cover 3 from the inside. A part of the sealing structure 6 insulates the top cover 3 from the battery cell 1, and then the upper pole plate 5 is placed through the opening structure formed by the sealing structure 6, so that the second The pole plate 52 is inserted into the welding hole 43 and is welded and fixed to the lower pole plate 4. At this time, a part of the sealing mechanism 6 insulates the top cover 3 from the upper pole plate 5 and the lower pole plate 4. Since the upper pole plate 5 and the lower pole plate 4 are both made of conductive materials, the upper pole plate 5 is connected to the battery cell 1. External electrical equipment can charge and discharge the battery cell 1 by connecting to the upper pole plate 5. Compared with the traditional battery top cover structure, this structure omits the connecting plate structure, so that external electrical equipment can be directly connected to the upper pole plate 5 for charging and discharging.

[0029] An interpenetrating battery top cover structure and a battery provided by an embodiment of the utility model, by setting a lower pole plate 4, extending the pole ear 2 from the top of the battery cell 1 to the outside of the battery cell 1 and welding it to the lower pole plate 4, so that the pole ear 2 is firmly fixed to the outside of the battery cell 1, and then connected to the lower pole plate 4 through the upper pole plate 5, so that the external electrical equipment is connected to the upper pole plate 5 for charging and discharging. Compared with the traditional technology of bending the pole ear 2 toward the inside of the battery cell 1 and setting a connecting piece to connect with the pole plate, the interpenetrating battery top cover structure provided by an embodiment of the utility model does not need to bend the pole ear toward the inside of the battery cell, which can effectively solve the problem of internal short circuit caused by internal insertion of the pole ear in the prior art.

[0030] Optionally, the sealing structure 6 includes an upper plastic 61, a lower plastic 62 and a sealing ring 63, the lower plastic 62 is arranged between the top cover 3 and the battery cell 1, the upper plastic 61 is arranged between the upper pole plate 5 and the top cover 3, the sealing ring 63 is arranged at the connection between the upper pole plate 5 and the lower pole plate 4, and the two ends of the sealing ring 63 are respectively abutted against the upper plastic 61 and the lower plastic 62.

[0031] Exemplarily, in the embodiment of the utility model, by setting the sealing structure into a three-section structure, it can make it more convenient for operators during assembly. Since the sealing structure 6 needs to insulate and isolate the top cover 3 from the battery cell 1, the overall shape of the sealing structure 6 is relatively complex, and the operation may be more complicated when assembling the sealing structure 6. By decomposing the sealing structure 6 into three separate structures of the upper plastic 61, the lower plastic 62 and the sealing ring 63, the operation will be more convenient when the operator is assembling, which not only improves the operational convenience of the interlaced battery top cover structure, but also improves the production efficiency.

[0032] Optionally, a third mounting hole 53 is formed on the upper pole plate 5 , and a cap 7 is formed on the third mounting hole 53 .

[0033] For example, in the embodiment of the utility model, by opening a third mounting hole 53 on the upper pole plate 5, the connection between the pole lug 2 and the lower pole plate 4 can be confirmed through the third mounting hole 53 without disassembling the upper pole plate 5. Since the electric energy is conducted through the pole lug 2 and the lower pole plate 4, the connection between the pole lug 2 and the lower pole plate 4 is particularly important. By setting the third mounting hole 53, it is more convenient for operators to maintain the battery structure later, thereby further improving the convenience of operation of the intercalated battery top cover structure. Covering the third mounting hole 53 with a cap 7 can place the pole lug 2 in a closed environment, provide certain protection for the pole lug 2, and thus improve the stability of the intercalated battery top cover structure.

[0034] Optionally, the cap 7 is flush with the first pole plate 51 .

[0035] Exemplarily, in an embodiment of the utility model, by setting the cap 7 to be flush with the first pole plate 51, the overall height of the intercalated battery top cover structure can be reduced, thereby reducing the space occupied by the intercalated battery top cover structure, and further allowing more intercalated battery top cover structures to be arranged within a certain space, thereby improving the energy density of the battery.

[0036] Optionally, a filling piece 8 is provided between the cap 7 and the lower pole plate 4 .

[0037] Illustratively, in the embodiment of the utility model, due to the formation of a cavity structure between the upper pole plate 5 and the lower pole plate 4, there is still a large space after the pole ear 2 and the lower pole plate 4 are welded. By arranging a filler 8 in this space, after the cap 7 is installed, the pole ear 2 is pressed against the lower pole plate 4 by the filler 8, so that the connection between the pole ear 2 and the lower pole plate 4 is more stable, thereby further improving the stability of the intercalary battery top cover structure.

[0038] Optionally, a rubber ring 42 is disposed in the first mounting hole 41 , and the tab 2 is inserted into the rubber ring 42 .

[0039] Illustratively, in the embodiment of the utility model, since the pole lug 2 needs to pass through the first mounting hole 41 for welding, for the convenience of installation, there is still a large gap in the first mounting hole 41 after the pole lug 2 passes through. By arranging a rubber ring 42 in the first mounting hole 41, the pole lug 2 is stably fixed in the first mounting hole 41 after passing through the rubber ring 42, preventing the pole lug 2 from shaking in the first mounting hole 41 and causing a disconnection phenomenon, thereby further improving the stability of the intercalary battery top cover structure.

[0040] Optionally, a plurality of pole ears 2 are provided, and a plurality of first mounting holes 41 are correspondingly provided.

[0041] Illustratively, in an embodiment of the utility model, by providing multiple pole ears 2 and multiple first mounting holes 41, multiple pole ears 2 can be led out from the battery cell 1 to communicate with external equipment, so that when manufacturing the battery cell 1, a larger volume of the battery cell 1 can be manufactured, thereby increasing the capacity of the battery cell 1 and improving the battery capacity of the intercalated battery top cover structure.

[0042] A battery includes the aforementioned intercalated battery top cover structure, characterized in that it also includes a shell 9, the shell 9 is a box-shaped structure with an open top, the top cover 3 is covered on the opening, and the battery cell 1 is arranged in the shell 9.

[0043] Illustratively, in an embodiment of the utility model, the battery cell 1 is disposed in a shell 9, which can provide physical protection for the battery cell 1. When the battery cell 1 is subjected to a physical collision, the shell 9 can reduce the impact force exerted on the battery cell 1, thereby ensuring the normal operation of the battery cell 1 and further improving the stability of the intercalary battery top cover structure.

[0044] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plug-in battery top cover structure, characterized in that: include: A battery cell (1), a pole ear (2), a top cover (3), a lower pole plate (4), an upper pole plate (5) and a sealing structure (6), The pole lug (2) is arranged on the top of the battery cell (1), the lower pole plate (4) is arranged above the battery cell (1), a first mounting hole (41) matching the pole lug (2) is opened on the lower pole plate (4), the pole lug (2) penetrates the first mounting hole (41), is bent, and then welded to the lower pole plate (4), The top cover (3) is arranged above the battery cell (1) and the lower pole plate (4); a second mounting hole (31) is provided on the top cover (3); the upper pole plate (5) comprises a first pole plate (51) parallel to the lower pole plate (4) and a second pole plate (52) perpendicular to the lower pole plate (4); the second pole plate (52) is passed through the second mounting hole (31) and connected to the lower pole plate (4); and the sealing structure (6) is arranged between the top cover (3) and the battery cell (1), the lower pole plate (4) and the upper pole plate (5).

2. The intercalated battery top cover structure according to claim 1, characterized in that: The sealing structure (6) comprises an upper plastic (61), a lower plastic (62) and a sealing ring (63); the lower plastic (62) is arranged between the top cover (3) and the battery cell (1); the upper plastic (61) is arranged between the upper pole plate (5) and the top cover (3); the sealing ring (63) is arranged at the connection between the upper pole plate (5) and the lower pole plate (4); and the two ends of the sealing ring (63) are respectively in contact with the upper plastic (61) and the lower plastic (62).

3. The intercalated battery top cover structure according to claim 1, characterized in that: A third mounting hole (53) is provided on the upper pole plate (5), and a cap (7) is provided on the third mounting hole (53).

4. The intercalated battery top cover structure according to claim 3, characterized in that: The cap (7) is flush with the first pole plate (51).

5. The intercalated battery top cover structure according to claim 3, characterized in that: A filling piece (8) is provided between the cap (7) and the lower pole plate (4).

6. The intercalated battery top cover structure according to claim 1, characterized in that: A rubber ring (42) is arranged in the first mounting hole (41), and the pole lug (2) is inserted into the rubber ring (42).

7. The intercalated battery top cover structure according to claim 1, characterized in that: A plurality of the pole ears (2) are provided, and a plurality of the first mounting holes (41) are correspondingly provided.

8. A battery, comprising the intercalated battery top cover structure according to any one of claims 1 to 7, characterized in that: It also comprises a shell (9), the shell (9) being a box-shaped structure with an opening at the top, the top cover (3) being arranged on the opening, and the battery cell (1) being arranged in the shell (9).

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