Battery top cover structure

Abstract

The utility model provides a battery top cover structure and belongs to the field of lithium batteries. The structure comprises a battery cell, a tab, a connecting piece, a pole and a top cover, the pole is arranged on the top cover, the top cover is arranged above the connecting piece, the tab is arranged at the top of the battery cell and located below the top cover, the connecting piece comprises a tab connecting section and a pole connecting section, the pole connecting section is connected with the pole, the tab connecting section is connected to the pole connecting section and extends towards the battery cell, and the pole connecting section is connected to the pole connecting section. And the tab connecting section is connected with the tab. By adopting the battery top cover structure provided by the embodiment of the utility model, the problems that the tabs are easy to break and the safety is low in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to a battery top cover structure. 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 tab and the top cover pole is mainly to weld the tab to the adapter, and then weld the adapter to the pole. In this process, the tab will be bent when the battery cell is put into the shell, which is easy to break, and the overall structural firmness is weak.

[0004] The battery top cover structure in the existing related technology has a tab that is easy to break and a weak overall structural firmness. Utility Model Content

[0005] The embodiment of the utility model provides a battery top cover structure, which can solve the problem of easy breakage of the tabs and weak overall structural firmness in the prior art. The technical solution is as follows:

[0006] A battery top cover structure, comprising: a battery cell, a tab, a connecting piece, a pole and a top cover,

[0007] The pole is arranged on the top cover, the top cover is arranged above the connecting plate, the pole lug is arranged on the top of the battery cell and is located below the top cover, the connecting plate includes a pole lug connecting section and a pole connecting section, the pole connecting section is connected to the pole, the pole lug connecting section is connected to the pole connecting section and extends toward the battery cell, and the pole lug connecting section is connected to the pole lug.

[0008] Optionally, an insulating layer is provided on the outer surface of the connecting sheet, and the insulating layer covers the upper edge of the battery core.

[0009] Optionally, it further comprises 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.

[0010] Optionally, an aluminum ring is provided on the outer surface of the insulating layer, and a groove matching the aluminum ring is provided on the shell.

[0011] Optionally, the aluminum ring and the shell are both made of aluminum alloy.

[0012] Optionally, the insulating layer is a rubber member.

[0013] Optionally, an insulating cover plate is provided on the top cover, and a second mounting hole matching the pole is opened on the insulating cover plate.

[0014] Optionally, an explosion-proof valve is provided on the top cover.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0016] A battery top cover structure provided by an embodiment of the utility model has a door-shaped connecting piece arranged on the top of the battery cell, so that the pole ear can be welded on the inner surface of the connecting piece, thereby protecting the pole ear; by arranging a pole on the top of the connecting piece, the battery cell can be connected to an external device; the connecting piece is fixed by the top cover and prevented from being accidentally touched, thereby improving the stability of the battery top cover structure and being able to effectively solve the problem in the prior art that the pole ear is easy to break and the overall structural firmness is weak. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is a schematic diagram of the overall structure provided by the embodiment of the utility model;

[0019] Figure 2 It is a side cross-sectional schematic diagram of the overall structure provided by an embodiment of the utility model;

[0020] Figure 3 It is a side cross-sectional schematic diagram of another overall structure provided by an embodiment of the utility model;

[0021] Figure 4 It is a schematic top view of the overall structure provided by an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the main view of the housing provided by the embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of the insulating cover provided by the embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the top cover structure provided by an embodiment of the utility model.

[0025] In the figure: 1-battery cell; 2-ear; 3-connecting piece; 31-ear connecting section; 32-pole connecting section; 4-pole; 5-top cover; 51-first mounting hole; 6-insulating layer; 7-shell; 71-groove; 8-aluminum ring; 9-insulating cover plate; 91-second mounting hole. 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 provided by the embodiment of the utility model; Figure 2 It is a side cross-sectional schematic diagram of the overall structure provided by an embodiment of the utility model; Figure 3 It is a side cross-sectional schematic diagram of another overall structure provided by an embodiment of the utility model; Figure 4 It is a schematic top view of the overall structure provided by an embodiment of the utility model; Figure 5 It is a schematic diagram of the main view of the housing provided by the embodiment of the utility model; Figure 6 It is a schematic diagram of the structure of the insulating cover provided by the embodiment of the utility model; Figure 7 Schematic diagram of the top cover structure provided by the embodiment of the utility model. Figures 1 to 7 A battery top cover structure shown includes: a battery cell 1, a pole lug 2, a connecting piece 3, a pole 4 and a top cover 5, the pole 4 is arranged on the top cover 5, the top cover 5 is arranged above the connecting piece 3, the pole lug 2 is arranged at the top of the battery cell 1 and is located below the top cover 5, the connecting piece 3 includes a pole lug connecting section 31 and a pole post connecting section 32, the pole post connecting section 32 is connected to the pole 4, the pole lug connecting section 31 is connected to the pole post connecting section 32 and extends toward the battery cell 1, and the pole lug connecting section 31 is connected to the pole lug 2.

[0028] For example, in the embodiment of the present utility model, Figure 2 As shown, two battery cells 1 are provided, and a pole lug 2 extends from the top of each battery cell 1. A first mounting hole 51 matching the pole column 4 is provided on the top cover 5. A connecting piece 3 is set above the battery cell 1, and the connecting piece 3 has two pole lug connecting sections 31. By welding the pole lug 2 to the inner surface of the pole lug connecting section 31, the connecting piece 3 is a conductive material, so that the pole lug 2 and the connecting piece 3 form a passage, and the battery cell 1 also forms a passage with the connecting piece 3. Then, a pole column 4 is provided on the connecting piece 3, so that the pole column 4 and the battery cell 1 form a passage, and then the pole column 4 is connected to an external device to form a passage, so that the battery cell 1 and the external device can be charged and discharged. Through this structure, there is no need to fold and weld the pole lug 2, thereby reducing the possibility of the pole lug breaking. By providing the connecting piece 3, the pole lug 2 is protected, thereby increasing the stability and safety of the battery top cover structure. Thereafter, a top cover 5 is arranged on the connecting piece 3, and a first mounting hole 51 matching the pole 4 is opened on the top cover 5. At this time, the material of the top cover 5 is an insulating material. Through this structure, only part of the pole 4 is connected to the external device, preventing the top of the connecting piece 3 from being exposed to the outside and causing accidental touch.

[0029] A battery top cover structure provided by an embodiment of the utility model has a door-shaped connecting piece 3 arranged on the top of the battery cell 1, so that the pole ear 2 can be welded on the inner surface of the connecting piece 3, thereby protecting the pole ear 2; by arranging a pole 4 on the top of the connecting piece 3, the battery cell 1 can be connected to an external device; the connecting piece 3 is fixed by the top cover 5 and the connecting piece 3 is prevented from being accidentally touched, thereby improving the stability of the battery top cover structure and being able to effectively solve the problem in the prior art that the pole ear is easy to break and the overall structure is weak in firmness.

[0030] Optionally, an insulating layer 6 is provided on the outer surface of the connecting sheet 3 , and the insulating layer 6 covers the upper edge of the battery core 1 .

[0031] For example, in the embodiment of the present utility model, Figure 2 As shown, the insulating layer 6 is attached to the outer surface of the connecting piece 3. Since the connecting piece 3 is a door-shaped structure, the insulating layer 6 is also a door-shaped structure. By providing the insulating layer 6 on the outer surface of the connecting piece 3, the insulating layer 6 isolates the battery cell 1 from the aluminum ring 8 and the top cover 5, so that the outer side of the connecting piece 3 is fully isolated from the electricity by the insulating layer 6, preventing the connecting piece 3 from accidentally touching other structures to make them charged, or causing a short circuit inside the battery cell 1. By providing the insulating layer 6, the stability of the battery top cover structure is further improved. Figure 3 As shown, it is another embodiment of the utility model, the upper end of the insulating layer 6 is extended to the aluminum ring 8 and the top cover 5, so that the insulating layer 6 separates and insulates the pole 4 from the aluminum ring 8 and the top cover 5. By setting the insulating layer 6 into this structure, it is possible to save the need to set a separate insulating ring, thereby reducing the manufacturing cost of the battery top cover structure.

[0032] Optionally, a shell 7 is further included. The shell 7 is a box-shaped structure with an opening at the top. The top cover 5 is covered on the opening, and the battery cell 1 is arranged in the shell 7.

[0033] Illustratively, in an embodiment of the utility model, the battery cell 1 is disposed in a shell 7, which can provide physical protection for the battery cell 1. When the battery cell 1 is subjected to a physical collision, the shell 7 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 battery top cover structure.

[0034] Optionally, an aluminum ring 8 is provided on the outer surface of the insulating layer 6 , and a groove 71 matching the aluminum ring 8 is provided on the housing 7 .

[0035] For example, in the embodiment of the utility model, the aluminum ring 8, the connecting piece 3 and the insulating layer 6 are made by integral injection molding, which can improve the production efficiency of the structure. The aluminum ring 8 and the connecting piece 3 are fixed at intervals, and then the colloidal material is poured into the interval between the aluminum ring 8 and the connecting piece 3. After being cold fixed and cooled, an insulating layer 6 is formed between the aluminum ring 8 and the connecting piece 3. Then the integral structure formed by the aluminum ring 8, the connecting piece 3 and the insulating layer 6 is welded to the pole ear 2, and then the aluminum ring 8 is embedded in the groove 71, and the aluminum ring 8 is welded to the groove 71 of the shell 7 to form a complete plane, and then the top cover 5 is placed on the top of the shell 7 and fixed to complete the assembly of the entire battery structure. The connecting piece 3 and the insulating layer 6 structure manufactured by this method, because it is integrally injected, makes the overall sealing higher, thereby further improving the stability of the battery top cover structure. In another embodiment of the utility model, the top cover 5 and the aluminum ring 8 can also be formed by integral casting, thereby reducing the process flow of separate production of parts and components, thereby improving the production efficiency of the battery top cover structure.

[0036] Optionally, the aluminum ring 8 and the shell 7 are both made of aluminum alloy.

[0037] For example, in the embodiment of the utility model, aluminum alloy has the characteristics of light weight, good processability, good thermal conductivity, etc. When used as a battery shell material, it is convenient to manufacture and can also be beneficial to the heat dissipation inside the battery cell 1 to reduce the working temperature inside the battery cell 1. At the same time, aluminum alloy also has certain metal properties, which can provide physical protection for the battery cell 1 and reduce the negative impact of physical collision on the battery cell 1. Setting the aluminum ring 8 and the shell 7 to be the same material also facilitates the welding of the aluminum ring 8 and the shell 7 into an integral structure.

[0038] Optionally, the insulating layer 6 is a rubber member.

[0039] For example, in the embodiment of the utility model, the insulating layer 6 needs to play an insulating role, and rubber has good insulation, and the rubber material has very good elasticity, that is, it can be deformed under the action of external force, but can return to its original shape after the external force is removed, and is suitable for being made into a shape attached to the connecting piece 3. At the same time, compared with other materials, rubber has better wear resistance and corrosion resistance, can resist chemical corrosion, and withstand high and low temperature environments, and is suitable for use in the battery top cover structure.

[0040] Optionally, an insulating cover plate 9 is provided on the top cover, and a second mounting hole 91 matching with the pole 4 is opened on the insulating cover plate 9 .

[0041] Illustratively, in an embodiment of the utility model, an insulating cover plate 9 is provided on the top cover, which can further prevent the part other than the pole 4 from being exposed to the outside and causing accidental touch. The pole 4 is covered with an insulating cover plate 9, so that the external device can only charge and discharge externally through the pole 4, thereby further improving the stability of the battery top cover structure.

[0042] Optionally, an explosion-proof valve 52 is provided on the top cover 5 .

[0043] For example, in the embodiment of the utility model, an explosion-proof valve 52 is provided on the top cover, and the explosion-proof valve 52 is connected to the space inside the housing 7. When excessive gas or overheating is generated inside the lithium battery, the explosion-proof valve 52 will automatically open to release the internal gas and heat, thereby reducing the pressure and temperature inside the battery. This effectively prevents explosions or fires that may occur due to short circuits caused by overheating, overcharging, overdischarging, or external extrusion of the battery. By providing the explosion-proof valve 52, the safety of the battery top cover structure is improved.

[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 battery top cover structure, characterized in that: include: A battery cell (1), a terminal ear (2), a connecting piece (3), a terminal post (4) and a top cover (5), The pole (4) is arranged on the top cover (5), the top cover (5) is arranged above the connecting piece (3), the pole lug (2) is arranged on the top of the battery cell (1) and is located below the top cover (5), the connecting piece (3) comprises a pole lug connecting section (31) and a pole connecting section (32), the pole connecting section (32) is connected to the pole (4), the pole lug connecting section (31) is connected to the pole connecting section (32) and extends toward the battery cell (1), and the pole lug connecting section (31) is connected to the pole lug (2).

2. A battery top cover structure according to claim 1, characterized in that: An insulating layer (6) is provided on the outer surface of the connecting sheet (3), and the insulating layer (6) covers the upper edge of the battery core (1).

3. A battery top cover structure according to claim 2, characterized in that: It also comprises a shell (7), the shell (7) being a box-shaped structure with an opening at the top, the top cover (5) being arranged on the opening, and the battery cell (1) being arranged in the shell (7).

4. A battery top cover structure according to claim 3, characterized in that: An aluminum ring (8) is provided on the outer surface of the insulating layer (6), and a groove (71) matching the aluminum ring (8) is provided on the shell (7).

5. A battery top cover structure according to claim 4, characterized in that: The aluminum ring (8) and the shell (7) are both aluminum alloy parts.

6. A battery top cover structure according to claim 2, characterized in that: The insulating layer (6) is a rubber piece.

7. A battery top cover structure according to claim 1, characterized in that: An insulating cover plate (9) is provided on the top cover, and a second mounting hole (91) matching the pole (4) is provided on the insulating cover plate (9).

8. A battery top cover structure according to claim 1, characterized in that: The top cover (5) is provided with an explosion-proof valve (52).

Images