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 pole plate and upper plastic, the tab is arranged at the top of the battery cell, the pole plate and the top cover are arranged above the battery cell, a first mounting hole matched with the pole plate is formed in the top cover, and the upper plastic is arranged in the first mounting hole and clamped between the top cover and the pole plate. Second mounting holes matched with the tabs are formed in the pole column plate; the tabs penetrate through the second mounting holes to be bent and then are welded with the pole column 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 pole plate and an upper plastic.

[0007] The pole ear is arranged on the top of the battery cell, the pole plate and the top cover are arranged above the battery cell, a first mounting hole matching the pole plate is opened on the top cover, the upper plastic is arranged in the first mounting hole and clamped between the top cover and the pole plate, a second mounting hole matching the pole ear is opened on the pole plate, and the pole ear penetrates the second mounting hole, is bent, and then is welded to the pole plate.

[0008] Optionally, a lower plastic is provided between the top cover and the pole plate and the battery cell, and the lower plastic covers the top surface of the battery cell.

[0009] Optionally, a welding plate is further included, the top of the pole plate is provided with an annular protrusion, the welding plate cover is provided on the annular protrusion, the pole plate and the welding plate form a cavity, and the pole ear is provided in the cavity.

[0010] Optionally, a first mounting groove is provided on the inner edge of the annular protrusion, and the welding plate is arranged in the first mounting groove.

[0011] Optionally, a spring sheet is arranged in the cavity, and the spring sheet is clamped between the welding plate and the pole plate.

[0012] Optionally, an aluminum ring is arranged above the top cover and the upper plastic, the outer edge of the aluminum ring is connected to the top cover, and the inner edge of the aluminum ring is connected to the upper plastic.

[0013] Optionally, the upper plastic is injection-molded between the pole plate and the aluminum ring.

[0014] Optionally, the aluminum ring is welded to the top cover.

[0015] Optionally, a plurality of the pole ears are provided, and a plurality of the second mounting holes are correspondingly provided.

[0016] 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.

[0017] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0018] An interpenetrating battery top cover structure and a battery provided in an embodiment of the utility model are characterized in that a pole plate is arranged above the battery cell, a second mounting hole is opened on the pole plate, a pole ear is arranged on the top of the battery cell, and the pole ear is bent through the pole plate and welded to the pole plate, so that the pole ear is firmly fixed on the outside of the battery cell. Compared with the traditional technology of bending the pole ear toward the inside of the battery cell and providing a connecting piece connected to the pole plate, the interpenetrating battery top cover structure provided in an embodiment of the utility model does not need to bend the pole ear toward the inside of the battery cell, thereby effectively solving the problem of internal short circuit caused by internal insertion of the pole ear in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic diagram of the overall structure of the battery top cover provided by an embodiment of the utility model;

[0021] Figure 2 The utility model embodiment provides Figure 1 Schematic diagram of the cross section at AA;

[0022] Figure 3 The utility model embodiment provides Figure 2 An enlarged schematic diagram of point B;

[0023] Figure 4It is a schematic diagram of the cross-sectional structure of the pole plate provided by the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the top cover structure provided by an embodiment of the utility model;

[0025] Figure 6 The utility model embodiment provides Figure 5 Schematic diagram of the cross-sectional structure at CC;

[0026] Figure 7 It is a schematic diagram of the battery structure provided by an embodiment of the utility model.

[0027] In the figure: 1-battery cell; 2-ear; 3-top cover; 31-first mounting hole; 311-second mounting groove; 4-pole plate; 41-second mounting hole; 411-first mounting groove; 42-cavity; 43-annular protrusion; 44-spring; 5-upper plastic; 6-lower plastic; 7-welding plate; 8-aluminum ring; 9-shell. DETAILED DESCRIPTION

[0028] 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.

[0029] Figure 1 It is a schematic diagram of the overall structure of the battery top cover provided by an embodiment of the utility model; Figure 2 The utility model embodiment provides Figure 1 Schematic diagram of the cross section at AA; Figure 3 The utility model embodiment provides Figure 2 An enlarged schematic diagram of point B; Figure 4 It is a schematic diagram of the cross-sectional structure of the pole plate provided by an embodiment of the utility model; Figure 5 It is a schematic diagram of the top cover structure provided by an embodiment of the utility model; Figure 6 The utility model embodiment provides Figure 5 Schematic diagram of the cross-sectional structure at CC; Figure 7 Schematic diagram of the battery structure provided by the embodiment of the utility model. Figures 1 to 6 The illustrated intercalated battery top cover structure comprises: a battery cell 1, a pole ear 2, a top cover 3, a pole plate 4 and an upper plastic 5, wherein the pole ear 2 is arranged on the top of the battery cell 1, the pole plate 4 and the top cover 3 are arranged above the battery cell 1, a first mounting hole 31 matching the pole plate 4 is provided on the top cover 3, the upper plastic 5 is arranged in the first mounting hole 31 and clamped between the top cover 3 and the pole plate 4, a second mounting hole 41 matching the pole ear 2 is provided on the pole plate 4, and the pole ear 2 penetrates the second mounting hole 41, is bent, and then is welded to the pole plate 4.

[0030] Exemplarily, in an embodiment of the utility model, the positive and negative electrodes of the battery top cover have the same structure, and the pole ear 2 extends from the top of the battery cell 1. When assembling the structure, the top cover 3 is first installed on the top of the battery cell 1, and then the pole plate 4 is placed inside the first mounting hole 31. The pole plate 4 is a circular structure, and the pole ear 2 passes through the second mounting hole 41, and then the pole ear 2 is bent and fits with the upper surface of the pole plate 4, and then the bent pole ear 2 is welded to the pole plate, so that the pole plate 4 is conductively connected to the pole ear 2, and then the upper plastic 5 is arranged between the top cover 3 and the pole plate 4, so that the top cover 3 and the pole plate 4 are insulated. The upper plastic 5 can be formed by injection molding, and the injection molding material is directly injected into the gap between the top cover 3 and the pole plate 4 to form the upper plastic 5. The upper plastic 5 formed in this way has better sealing. Compared with the traditional battery top cover structure, the present structure omits the connecting plate, so that the external electrical appliance can be directly connected to the pole plate 4, so that the battery cell 1 and the external electrical appliance can perform charging and discharging operations.

[0031] An interpenetrating battery top cover structure provided in an embodiment of the utility model comprises a pole plate 4 arranged above the battery cell 1, and a second mounting hole 41 is opened on the pole plate 4, a pole ear 2 is arranged on the top of the battery cell 1, and the pole ear 2 is bent through the pole plate 4 and welded to the pole plate 4, so that the pole ear 2 is firmly fixed on the outside of the battery cell 1. Compared with the conventional technology in which the pole ear 2 is bent toward the inside of the battery cell 1 and a connecting piece is arranged to be connected with the pole plate 4, an interpenetrating battery top cover structure provided in an embodiment of the utility model does not need to bend the pole ear 2 toward the inside of the battery cell 1, thereby effectively solving the problem of internal short circuit caused by internal insertion of the pole ear in the prior art.

[0032] Optionally, a lower plastic 6 is provided between the top cover 3 , the pole plate 4 and the battery cell 1 , and the lower plastic 6 covers the top surface of the battery cell 1 .

[0033] Exemplarily, in the embodiment of the utility model, the lower plastic 6 is an insulating material. By setting the lower plastic 6, the top cover 3 and the battery cell 1 are insulated, and the pole plate 4 and the top of the battery cell 1 are insulated, so as to prevent the top cover 3 from being charged and causing safety hazards. By setting the lower plastic 6, the stability of the top cover structure of the intercalated battery is improved.

[0034] Optionally, a welding plate 7 is further included. An annular protrusion 43 is provided on the top of the pole plate 4 . The welding plate 7 is covered on the annular protrusion 43 . The pole plate 4 and the welding plate 7 form a cavity 42 . The pole lug 2 is provided in the cavity 42 .

[0035] Exemplarily, in an embodiment of the utility model, after the pole lug 2 and the pole column plate 4 are welded and installed, a welding plate 7 is arranged on the top of the pole column plate 4 to protect the pole lug 2. When the entire battery pack is transported or moved, physical collision may occur, causing the weld between the pole lug 2 and the pole column plate 4 to fall off, resulting in poor contact. By setting the welding plate 7, the external impact on the pole lug 2 can be reduced, and a physical protection effect is played. At the same time, it can also play a certain dustproof and waterproof role to prevent external interference with the connection between the pole lug 2 and the pole column plate 4, further improving the stability of the intercalated battery top cover structure.

[0036] Optionally, a first mounting groove 411 is formed on the inner edge of the annular protrusion 43 , and the welding plate 7 is disposed in the first mounting groove 411 .

[0037] Illustratively, in the embodiment of the utility model, by opening a first mounting groove 411 on the inner edge of the annular protrusion 43, the welding plate 7 is arranged in the first mounting groove 411, so that after the welding plate 7 is installed, the overall height of the welding plate 7 and the pole plate 4 can be lower. Under certain circumstances, the height of the welding plate 7 can be flush with the top cover 3, so that the overall size of the battery pack is reduced, thereby improving the energy density of the battery pack.

[0038] Optionally, a spring sheet 44 is disposed in the cavity 42 , and the spring sheet 44 is clamped between the welding plate 7 and the pole plate 4 .

[0039] For example, in an embodiment of the utility model, since the spatial height of the cavity 42 may be greater than the thickness of the pole lug 2, the pole lug 2 is not in direct contact with the welding plate 7, and there is still a certain interval. At this time, a spring sheet 44 may be arranged between the pole lug 2 and the welding plate 7, so that the welding plate 7 presses the pole lug 2 onto the pole plate 4 through the spring sheet 44, which can further improve the stability of the interpenetrating battery top cover structure.

[0040] Optionally, an aluminum ring 8 is arranged above the top cover 3 and the upper plastic 5 , the outer edge of the aluminum ring 8 is connected to the top cover 3 , and the inner edge of the aluminum ring 8 is connected to the upper plastic 5 .

[0041] For example, in the embodiment of the present utility model, by providing the aluminum ring 8, the upper plastic 5 and the top cover 3 can be fixed in the vertical direction, thereby improving the stability of the structure. Figure 6 As shown, in this embodiment, a second mounting groove 311 can be opened at the upper edge of the first mounting hole 31, and the aluminum ring 8 can be set in the second mounting groove 311, so that the aluminum ring 8 and the upper surface of the top cover 3 are flush, thereby further reducing the maximum external dimensions of the structure to reduce the space occupied by the structure.

[0042] At the same time, in this embodiment, the upper plastic 5 can be manufactured by injection molding. First, the outer edge of the aluminum ring 8 is fixed to the top cover 3 by welding. At this time, there is a certain gap between the inner edge of the aluminum ring 8 and the pole plate 4. Then, plastic is poured in the gap between the inner edge of the aluminum ring 8 and the pole plate 4. The interval space formed between the aluminum ring 8, the top cover 3 and the pole plate 4 forms an injection mold, so that the upper plastic 5 is formed by injection molding. The upper plastic 5 formed in this way can more stably fix the aluminum ring 8, the top cover 3 and the pole plate 4 together, further improving the stability of the interpenetrating battery top cover structure.

[0043] Optionally, a plurality of pole ears 2 are provided, and a plurality of second mounting holes 41 are correspondingly provided.

[0044] Illustratively, in an embodiment of the utility model, by providing multiple pole ears 2 and multiple second 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.

[0045] A battery includes the aforementioned intercalated battery top cover structure and a shell 9 , wherein the shell 9 is a box-shaped structure with an opening at the top, the top cover 3 is arranged on the opening, and the battery cell 1 is arranged in the shell 9 .

[0046] For example, in the embodiment of the present utility model, Figure 7 As shown, the battery cell 1 is arranged in the shell 9, which can provide physical protection for the battery cell 1. When the battery cell 1 is subjected to physical collision, the shell 9 can reduce the impact force 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.

[0047] 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.

[0048] 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. An intercalated battery top cover structure, characterized in that: include: Battery cell (1), terminal ear (2), top cover (3), terminal plate (4) and upper plastic (5), The pole lug (2) is arranged on the top of the battery cell (1); the pole plate (4) and the top cover (3) are arranged above the battery cell (1); a first mounting hole (31) matching the pole plate (4) is provided on the top cover (3); the upper plastic (5) is arranged in the first mounting hole (31) and clamped between the top cover (3) and the pole plate (4); a second mounting hole (41) matching the pole lug (2) is provided on the pole plate (4); the pole lug (2) penetrates the second mounting hole (41), is bent, and then is welded to the pole plate (4).

2. The intercalated battery top cover structure according to claim 1, characterized in that: A lower plastic (6) is provided between the top cover (3), the pole plate (4) and the battery cell (1), and the lower plastic (6) covers the top surface of the battery cell (1).

3. The intercalated battery top cover structure according to claim 1, characterized in that: It also includes a welding plate (7), the top of the pole plate (4) is provided with an annular protrusion (43), the welding plate (7) is covered on the annular protrusion (43), the pole plate (4) and the welding plate (7) form a cavity (42), and the pole lug (2) is arranged in the cavity (42).

4. The intercalated battery top cover structure according to claim 3, characterized in that: A first mounting groove (411) is provided on the inner edge of the annular protrusion (43), and the welding plate (7) is arranged in the first mounting groove (411).

5. The intercalated battery top cover structure according to claim 3, characterized in that: A spring sheet (44) is arranged in the cavity (42), and the spring sheet (44) is clamped between the welding plate (7) and the pole plate (4).

6. The intercalated battery top cover structure according to claim 1, characterized in that: An aluminum ring (8) is arranged above the top cover (3) and the upper plastic (5), the outer edge of the aluminum ring (8) is connected to the top cover (3), and the inner edge of the aluminum ring (8) is connected to the upper plastic (5).

7. The intercalated battery top cover structure according to claim 6, characterized in that: The upper plastic (5) is formed by injection molding between the pole plate (4) and the aluminum ring (8).

8. The intercalated battery top cover structure according to claim 6, characterized in that: The aluminum ring (8) is welded to the top cover (3).

9. 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 second mounting holes (41) are correspondingly provided.

10. A battery, comprising the intercalated battery top cover structure according to any one of claims 1 to 9, 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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