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, upper plastic and a cap, the top cover is arranged above the battery cell, a first mounting hole matched with the tab is formed in the top cover, the upper plastic is arranged above the top cover and covers the surface of the first mounting hole, a second mounting hole matched with the tab is formed in the edge of the upper plastic, and the cap is arranged in the second mounting hole. The tab is arranged at the top of the battery cell and penetrates through the first mounting hole and the second mounting hole, the tail end of the tab is bent towards the middle of the upper plastic, the cap covers the tab and is connected with the upper plastic, and the bent section of the tab is clamped between the cap and the upper plastic. 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 ear and the top cover pole is mainly to weld the pole ear 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 and a battery, 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, an upper plastic and a cap.

[0007] The top cover is arranged above the battery cell, and a first mounting hole matching the pole lug is formed on the top cover. The upper plastic is arranged above the top cover and covers the surface of the first mounting hole. A second mounting hole matching the pole lug is formed on the edge of the upper plastic. The pole lug is arranged at the top of the battery cell and penetrates the first mounting hole and the second mounting hole. The end of the pole lug is bent toward the middle of the upper plastic. The cap is arranged above the pole lug and connected to the upper plastic. The bent section of the pole lug is clamped between the cap and the upper plastic.

[0008] Optionally, a pole plate is arranged between the cap and the upper plastic, a third mounting hole matching the pole ear is opened on the pole plate, the third mounting hole is connected to the first mounting hole and the second mounting hole, and the bent part of the pole ear is clamped between the cap and the pole plate.

[0009] Optionally, the bent section of the pole lug is welded to the pole plate.

[0010] Optionally, the pole plate is a square structure with chamfers at four corners.

[0011] Optionally, a sub-top cover piece is provided on the top cover, and the sub-top cover piece is located between the upper plastic and the top cover. A fourth mounting hole matching the pole ear is opened on the sub-top cover piece, and the fourth mounting hole is connected to the first mounting hole and the second mounting hole, and the upper plastic covers the surface of the fourth mounting hole.

[0012] Optionally, a mounting groove is provided on the top cover, the sub-top cover piece is arranged in the mounting groove, and the upper surface of the sub-top cover piece is flush with the top cover.

[0013] Optionally, a lower plastic is provided between the top cover and the battery core, a fifth mounting hole matching the tab is provided on the lower plastic, and the fifth mounting hole is communicated with the first mounting hole and the second mounting hole.

[0014] Optionally, an insulating ring is provided in the fifth mounting hole.

[0015] Optionally, a plurality of the pole ears are provided, and a plurality of the first mounting holes and the second mounting holes are also 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 embodiment of the utility model provides an interpenetrating battery top cover structure and a battery, wherein the pole ear penetrates the top cover and the upper plastic through a first mounting hole and a second mounting hole and is bent, the pole ear is insulated from the top cover by providing the upper plastic, and the bent portion of the pole ear is clamped and fixed between a cap and the upper plastic, and then the cap is placed on the top of the pole ear, and the cap is connected to an external electrical appliance for charging and discharging. Through this structure, the pole ear does not need to be bent inside the battery cell, and at the same time, due to the clamping and fixing between the cap and the upper plastic, the pole ear is stably fixed above the top cover, which 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

[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 provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic top view of the overall structure provided by an embodiment of the utility model;

[0022] Figure 3 The utility model embodiment provides Figure 2 Schematic diagram of the cross section at AA;

[0023] Figure 4 The utility model embodiment provides Figure 3 An enlarged schematic diagram of point B;

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

[0025] Figure 6 It is a schematic diagram of the structure of the pole plate, upper plastic and sub-top cover plate assembly provided by the embodiment of the utility model;

[0026] Figure 7 It is a schematic diagram of the pole plate structure provided by an embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of the upper plastic structure provided by an embodiment of the utility model;

[0028] Fig. 9 It is a schematic diagram of the structure of the sub-top cover sheet provided in an embodiment of the utility model;

[0029] Fig.10 This is another schematic diagram of the top cover structure provided by an embodiment of the utility model;

[0030] Fig.11 It is a schematic diagram of a battery provided by an embodiment of the utility model.

[0031] In the figure: 1-battery cell; 2-ear; 3-top cover; 31-first mounting hole; 32-mounting groove; 4-upper plastic; 41-second mounting hole; 5-cap; 6-pole plate; 61-third mounting hole; 7-lower plastic; 71-fifth mounting hole; 8-sub-top cover plate; 81-fourth mounting hole; 9-housing; 10-insulating ring. DETAILED DESCRIPTION

[0032] 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.

[0033] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model; Figure 2 It is a schematic top view of the overall structure provided by an embodiment of the utility model; Figure 3 The utility model embodiment provides Figure 2 Schematic diagram of the cross section at AA; Figure 4 The utility model embodiment provides Figure 3 An enlarged schematic diagram of point B; Figure 5 It is a schematic diagram of the top cover and lower plastic structure provided by an embodiment of the utility model; Figure 6 It is a schematic diagram of the structure of the pole plate, upper plastic and sub-top cover plate assembly provided by the embodiment of the utility model;

[0034] Figure 7 It is a schematic diagram of the pole plate structure provided by an embodiment of the utility model; Figure 8 It is a schematic diagram of the upper plastic structure provided by an embodiment of the utility model; Fig. 9 It is a schematic diagram of the structure of the sub-top cover sheet provided in an embodiment of the utility model; Fig.10 This is another schematic diagram of the top cover structure provided by an embodiment of the utility model;

[0035] Fig.11 Schematic diagram of a battery provided by an embodiment of the utility model. Figures 1 to 11 The illustrated embodiment of an intercalated battery top cover structure comprises: a battery cell 1, a tab 2, a top cover 3, an upper plastic 4 and a cap 5, wherein the top cover 3 is arranged above the battery cell 1, and a first mounting hole 31 matching the tab 2 is formed on the top cover 3, the upper plastic 4 is arranged above the top cover 3 and covers the surface of the first mounting hole 31, a second mounting hole 41 matching the tab 2 is formed on the edge of the upper plastic 4, the tab 2 is arranged at the top of the battery cell 1 and penetrates the first mounting hole 31 and the second mounting hole 41, the end of the tab 2 is bent toward the middle of the upper plastic 4, the cap 5 is covered above the tab 2 and connected to the upper plastic 4, and the bent section of the tab 2 is clamped between the cap 5 and the upper plastic 4.

[0036] For example, in the embodiment of the present invention, the tab 2 is led out from the top of the battery cell 1, and the top cover 3 is arranged above the battery cell 1. Fig.10 As shown, it is an embodiment of the utility model, the top cover 3 is provided with a first mounting hole 31, and an upper plastic 4 is arranged above the top cover 3. The upper plastic 4 is an insulating material, and the upper plastic 4 is provided with a second mounting hole 41. The second mounting hole 41 covers the surface of the first mounting hole 31, so that the pole ear 2 is still insulated from the top cover 3 when passing through the first mounting hole 31, and then the pole ear 2 passing through the first mounting hole 31 and the second mounting hole 41 is bent, so that the bent part of the pole ear 2 is in contact with the upper plastic 4, and finally the cap 5 is covered on the bent pole ear 2, so that the bent pole ear 2 is clamped and fixed between the cap 5 and the upper plastic 4, so as to protect the pole ear 2, and then the cap 5 contacts with the external electrical appliance, so that the battery cell 1 can be charged and discharged.

[0037] An embodiment of the utility model provides an interpenetrating battery top cover structure, wherein the pole lug 2 passes through the top cover 3 and the upper plastic 4 through the first mounting hole 31 and the second mounting hole 41 and is bent toward the middle of the upper plastic 4. When a plurality of pole lugs 2 are provided, the plurality of pole lugs 2 can be arranged facing each other. By setting the upper plastic 4, the pole ear 2 is insulated from the top cover 3, and the bent part of the pole ear 2 is clamped and fixed between the cap 5 and the upper plastic 4, and then the cap 5 is covered on the top of the pole ear 2, and the cap 5 is connected to the external electrical appliance for charging and discharging. Through this structure, the pole ear 2 does not need to be bent inside the battery cell 1. At the same time, due to the clamping and fixing between the cap 5 and the upper plastic 4, the pole ear 2 is stably fixed above the top cover 3. Compared with the traditional battery top cover structure in which the connecting piece is used to connect the pole ear and the pole, the interlaced battery top cover structure reduces the setting of the connecting piece, which can reduce the components for conducting electricity in the middle, thereby reducing the internal resistance of the battery cell. At the same time, since the pole ear 2 is external, the pole ear 2 no longer needs to be inserted upside down in the internal space of the battery, which can effectively solve the problem of internal short circuit caused by the internal insertion of the pole ear in the prior art.

[0038] Optionally, a pole plate 6 is arranged between the cap 5 and the upper plastic 4 , and a third mounting hole 61 matching the pole lug 2 is opened on the pole plate 6 , the third mounting hole 61 is connected to the first mounting hole 31 and the second mounting hole 41 , and the bent part of the pole lug 2 is clamped between the cap 5 and the pole plate 6 .

[0039] For example, in the embodiment of the present utility model, Figure 4 and Figure 7 As shown, since the upper plastic 4 is an insulating material, the material is usually too soft, and the pole plate 6 is made of a metal material, the material is usually hard, by arranging the pole plate 6 between the cap 5 and the upper plastic 4, the bent pole lug 2 can be clamped and fixed more stably, thereby reducing the possibility of secondary bending of the pole lug 2 due to external force. And after the cap 5 is assembled, the cap 5 and the pole plate 6 can be welded together at the joint of the cap 5 and the pole plate 6. Since both are conductive metal materials, they are easier to be tightly connected together compared to the upper plastic 4, so that the pole lug 2 is completely wrapped inside, thereby further protecting the pole lug 2 and improving the stability of the intercalated battery top cover structure.

[0040] Optionally, the bent section of the pole lug 2 is welded to the pole plate 6 .

[0041] For example, in an embodiment of the utility model, when the battery is transported, a physical collision may occur, causing the pole lug 2 to separate from the pole plate 6, thereby causing a power outage. By welding the bent section of the pole lug 2 to the pole plate 6, the pole lug 2 and the pole plate 6 can be firmly connected together. Even if the battery is subjected to a certain physical collision, the pole lug 2 can be prevented from separating from the pole plate 6, thereby further improving the stability of the intercalated battery top cover structure.

[0042] Optionally, the pole plate 6 is a square structure with chamfers at four corners.

[0043] For example, in the embodiment of the present utility model, Figure 6 As shown, when the pole plate 6 is assembled, chamfers are set on the four corners of the pole plate 6, so that the operator can assemble more conveniently without worrying about scratching his hands. By setting the chamfers, the operator is protected and the operating convenience of the intercalated battery top cover structure is improved.

[0044] Optionally, a sub-top cover piece 8 is provided on the top cover 3, and the sub-top cover piece 8 is located between the upper plastic 4 and the top cover 3. A fourth mounting hole 81 matching the pole ear 2 is opened on the sub-top cover piece 8, and the fourth mounting hole 81 is connected with the first mounting hole 31 and the second mounting hole 41, and the upper plastic 4 covers the surface of the fourth mounting hole 81.

[0045] For example, in the embodiment of the present utility model, Figure 6 and Fig. 9 As shown, by setting the sub-top cover sheet 8, it is more convenient to assemble and cooperate. When mass-producing parts, the sub-top cover sheet 8, the upper plastic 4 and the pole plate 6 can be pre-assembled into an assembly. Then, when assembling, the pole ear 2 can be directly penetrated through the first mounting hole 31, the second mounting hole 41, the third mounting hole 61 and the fourth mounting hole 81, and then the assembly is directly placed on the top cover 3, and then the extended pole ear 2 is bent and covered with the cap 5 to complete the assembly. By setting the sub-top cover sheet, the assembly can be prefabricated, which improves the production efficiency of the intercalated battery top cover structure.

[0046] Optionally, a mounting groove 32 is opened on the top cover 3 , and the sub-top cover piece 8 is arranged in the mounting groove 32 , and the upper surface of the sub-top cover piece 8 is flush with the top cover 3 .

[0047] For example, in the present utility model example, Figure 5As shown, a mounting groove 32 is provided on the top cover 3, and the sub-top cover piece 8 is arranged in the mounting groove 32, and the upper surface of the sub-top cover piece 8 is flush with the top cover 3. By setting the sub-top cover piece 8 in this way, after the sub-top cover piece 8 is installed in cooperation with the top cover 3, it can be judged whether the sub-top cover piece 8 is installed in place by observing whether the upper surface of the sub-top cover piece is flush with the top cover 3. At the same time, the mounting groove 32 has a horizontal limit function for the sub-top cover piece 8, and the sub-top cover piece 8 can be fixed on the top cover 3 more stably, further improving the stability of the intercalated battery top cover structure. On the other hand, the upper surface of the sub-top cover piece 8 is flush with the top cover 3, so that when the sub-top cover piece 8 is welded and fixed to the top cover 3, the operation is more convenient. The sub-top cover piece 8 and the top cover 3 are welded by laser welding, which can achieve high-speed and high-precision welding.

[0048] Optionally, a lower plastic 7 is disposed between the top cover 3 and the battery core 1 , and a fifth mounting hole 71 matching the tab 2 is formed on the lower plastic 7 , and the fifth mounting hole 71 is connected to the first mounting hole 31 and the second mounting hole 41 .

[0049] Illustratively, in the embodiment of the utility model, the lower plastic 7 is an insulating material, and the lower plastic 7 is arranged between the top cover 3 and the battery cell 1 to play an insulating role, thereby preventing the top cover 3 from being charged and causing safety hazards. By arranging the lower plastic 7, the stability of the intercalary battery top cover structure is further improved.

[0050] Optionally, an insulating ring 10 is disposed in the fifth mounting hole 71 .

[0051] Illustratively, in an embodiment of the utility model, an insulating ring 10 is provided in the fifth mounting hole 71 to prevent the pole ear 2 from accidentally touching the top cover 3 or the sub-top cover sheet 8 when the pole ear 2 passes through the fifth mounting hole 71, thereby preventing a short circuit. By providing the insulating ring 10, the stability of the intercalary battery top cover structure is further improved.

[0052] Optionally, a plurality of pole tabs 2 are provided, and a plurality of first mounting holes 31 and a plurality of second mounting holes 41 are also provided.

[0053] Illustratively, in an embodiment of the utility model, by providing multiple pole ears 2, multiple first mounting holes 31 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 the volume of the battery cell 1 can be larger, thereby increasing the capacity of the battery cell 1 and improving the battery capacity of the intercalary battery top cover structure.

[0054] 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 covered on the opening, and the battery cell 1 is arranged in the shell 9 .

[0055] For example, in the embodiment of the present utility model, Fig.11As 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.

[0056] 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.

[0057] 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), tab (2), top cover (3), upper plastic (4) and cap (5), The top cover (3) is arranged above the battery cell (1); a first mounting hole (31) matching the pole lug (2) is provided on the top cover (3); the upper plastic (4) is arranged above the top cover (3) and covers the surface of the first mounting hole (31); a second mounting hole (41) matching the pole lug (2) is provided on the edge of the upper plastic (4); the pole lug (2) is arranged at the top of the battery cell (1) and penetrates the first mounting hole (31) and the second mounting hole (41); the end of the pole lug (2) is bent toward the middle of the upper plastic (4); the cap (5) is arranged above the pole lug (2) and connected to the upper plastic (4); the bent section of the pole lug (2) is clamped between the cap (5) and the upper plastic (4).

2. The intercalated battery top cover structure according to claim 1, characterized in that: A pole plate (6) is arranged between the cap (5) and the upper plastic (4); a third mounting hole (61) matching the pole lug (2) is provided on the pole plate (6); the third mounting hole (61) is connected to the first mounting hole (31) and the second mounting hole (41); and the bent portion of the pole lug (2) is clamped between the cap (5) and the pole plate (6).

3. The intercalated battery top cover structure according to claim 2, characterized in that: The bent section of the pole lug (2) is welded to the pole plate (6).

4. The intercalated battery top cover structure according to claim 2, characterized in that: The pole plate (6) is a square structure, with chamfers provided at the four corners.

5. The intercalated battery top cover structure according to claim 1, characterized in that: A sub-top cover sheet (8) is provided on the top cover (3), and the sub-top cover sheet (8) is located between the upper plastic (4) and the top cover (3). A fourth mounting hole (81) matching the pole lug (2) is opened on the sub-top cover sheet (8), and the fourth mounting hole (81) is connected with the first mounting hole (31) and the second mounting hole (41), and the upper plastic (4) covers the surface of the fourth mounting hole (81).

6. The intercalated battery top cover structure according to claim 5, characterized in that: The top cover (3) is provided with a mounting groove (32), the sub-top cover piece (8) is arranged in the mounting groove (32), and the upper surface of the sub-top cover piece (8) is flush with the top cover (3).

7. The intercalated battery top cover structure according to claim 1, characterized in that: A lower plastic (7) is provided between the top cover (3) and the battery core (1), and a fifth mounting hole (71) matching the pole lug (2) is provided on the lower plastic (7), and the fifth mounting hole (71) is communicated with the first mounting hole (31) and the second mounting hole (41).

8. The intercalated battery top cover structure according to claim 7, characterized in that: An insulating ring (10) is arranged in the fifth mounting hole (71).

9. The intercalated battery top cover structure according to claim 1, characterized in that: The pole lug (2) is provided in plurality, and the first mounting hole (31) and the second mounting hole (41) are also provided in plurality.

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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