Lithium ion battery injection molding part, lithium ion battery top cover assembly and battery system

Abstract

The utility model provides a lithium ion battery injection molding part, a lithium ion battery top cover assembly and a battery system, which are used for connecting a pole and a battery top cover. Comprising a polyphenylene sulfide injection molding conductive part and a high polymer material conductive part which is injection-molded outside the polyphenylene sulfide injection molding conductive part, the inner side surface of the polyphenylene sulfide injection molding conductive part is attached to the exterior of the pole, and the outer side surface of the polyphenylene sulfide injection molding conductive part is attached to the battery top cover. Due to the arrangement of the high polymer material conductive part, the overall structural strength of the lithium ion battery injection molding part can be improved, the lithium ion battery injection molding part does not deform or soften when generating heat in the charging and discharging process of the battery cell, the resistance value of the pole and the shell can be controlled, and the conductive stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery injection molded part, a lithium-ion battery top cover assembly and a battery system. Background Art

[0002] In lithium-ion batteries, the terminal and the housing are electrically connected via a conductive plastic component. These components are polyphenylene sulfide (PPS) injection-molded conductive parts, which incorporate a conductive agent. During the charge and discharge process, the tissue within these PPS injection-molded conductive parts grows larger, exceeding the specified range. The PPS injection-molded conductive parts exhibit low stability during vibration and other tests. Designing a structure that provides high strength while maintaining tissue stability within the component is a challenge for those skilled in the art. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem solved by the present invention is to provide a lithium-ion battery injection molded part, a lithium-ion battery top cover assembly and a battery system with high structural strength and capable of maintaining organizational stability.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a lithium-ion battery injection molded part for connecting a pole and a battery top cover; the part comprises: a polyphenylene sulfide injection molded conductive component and a polymer material conductive component injection molded on the outside of the polyphenylene sulfide injection molded conductive component; the inner side surface of the polyphenylene sulfide injection molded conductive component is adhered to the outside of the pole, and the outer side surface of the polyphenylene sulfide injection molded conductive component is adhered to the battery top cover.

[0005] Preferably, the polymer conductive component is made of carbon nanotubes, conductive fibers, steel reinforcements, adhesives or high-temperature resistant agents.

[0006] Furthermore, the conductive fiber is a carbon black fiber; the steel reinforcing agent is gallium or arsenic; the adhesive is a carboxymethyl cellulose adhesive; and the high temperature resistant agent is aluminosilicate.

[0007] Preferably, the polyphenylene sulfide injection-molded conductive component includes an injection-molded body and an injection-molded bottom disposed below the injection-molded body; and the polymer material conductive component is injection-molded on the outer surface of the injection-molded body.

[0008] Furthermore, the polymer material conductive component is located in the middle of the injection molded body.

[0009] Furthermore, the injection-molded body, the injection-molded bottom and the polymer conductive component are all quadrilateral structures; the four corners of the outer peripheral surface of the injection-molded body are all rounded, the four corners of the outer peripheral surface of the injection-molded bottom are all rounded; and the four corners of the polymer conductive component are all rounded.

[0010] The utility model also relates to a lithium-ion battery top cover assembly, comprising: a battery top cover, a pole and the lithium-ion battery injection molded part, wherein the lithium-ion battery injection molded part is injection molded between the pole and the battery top cover; the lithium-ion battery injection molded part is sleeved on the outer surface of the pole.

[0011] The utility model also relates to a battery system, comprising: the lithium-ion battery top cover assembly.

[0012] As described above, the lithium-ion battery injection molded part, lithium-ion battery top cover assembly, and battery system of the present invention have the following beneficial effects:

[0013] The edge of the polyphenylene sulfide injection-molded conductive part does not overlap with the pole, and the polyphenylene sulfide injection-molded conductive part fits tightly with the pole without any gap, thus ensuring the safety performance of the lithium-ion battery;

[0014] A polymer conductive component is injected onto the outside of the polyphenylene sulfide injection-molded conductive component, which can improve the torsional force and push-pull force of the lithium-ion battery injection-molded component; in addition, the polymer conductive component can stabilize the injection-molded structure in the polyphenylene sulfide injection-molded conductive component. The provision of the polymer conductive component can not only improve the overall structural strength of the lithium-ion battery injection-molded component, but also prevent the lithium-ion battery injection-molded component from deforming or softening due to heat generation during the charging and discharging process of the battery cell, thereby controlling the resistance value of the pole and the shell and improving the stability of conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of the top structure of the lithium-ion battery injection molded part of this embodiment arranged outside the pole.

[0016] Figure 2 It is a schematic diagram of the bottom structure of the embodiment in which the pole is arranged on the lower plastic part of the lithium-ion battery.

[0017] Figure 3 It is a schematic diagram showing the internal structure of the lithium-ion battery injection molded part of this embodiment arranged outside the pole.

[0018] Explanation of Figure Numbers

[0019] 1 pole

[0020] 2 Battery cover

[0021] 110 Polyphenylene sulfide injection molded conductive parts

[0022] 111 Injection Molded Body

[0023] 112 injection molded bottom

[0024] 120 Polymer conductive parts DETAILED DESCRIPTION

[0025] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0026] Please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0027] like Figures 1 to 3 As shown, the lithium-ion battery injection molded part of this embodiment is used to connect the pole 1 and the battery top cover 2; it includes: a polyphenylene sulfide injection molded conductive component 110 and a polymer material conductive component 120 injection molded on the outside of the polyphenylene sulfide injection molded conductive component 110; the inner side of the polyphenylene sulfide injection molded conductive component 110 is attached to the outside of the pole 1, and the outer side of the polyphenylene sulfide injection molded conductive component 110 is attached to the battery top cover 2.

[0028] The edge of the polyphenylene sulfide injection-molded conductive component 110 does not overlap with the pole 1. The polyphenylene sulfide injection-molded conductive component 110 fits tightly with the pole 1 without any gap, thereby ensuring the safety performance of the lithium-ion battery.

[0029] A polymer conductive component 120 is injection molded onto the outside of the polyphenylene sulfide injection-molded conductive component 110, which can improve the torsional and push-pull forces of the lithium-ion battery injection molded part. In addition, the polymer conductive component 120 can stabilize the injection-molded structure in the polyphenylene sulfide injection-molded conductive component 110. The provision of the polymer conductive component 120 not only improves the overall structural strength of the lithium-ion battery injection molded part, but also prevents the lithium-ion battery injection molded part from deforming or softening due to heat generation during the charge and discharge process of the battery cell, thereby controlling the resistance value between the pole 1 and the shell and improving the stability of conductivity. When the polyphenylene sulfide injection-molded conductive component 110 is in a molten state, the material corresponding to the polymer conductive component 120 is added for injection molding. After the polyphenylene sulfide injection-molded conductive component 110 and the polymer conductive component 120 are fused, they form an integrated structure.

[0030] The polymer conductive component 120 is made of carbon nanotubes, conductive fibers, steel reinforcement, adhesive, or high-temperature resistant agent. All of these materials can stabilize the injection molded structure of the polyphenylene sulfide injection molded conductive component 110 and enhance the overall structural strength of the lithium-ion battery injection molded part.

[0031] In this embodiment, the conductive fiber may be carbon black fiber; the steel reinforcing agent may be gallium or arsenic; the adhesive may be carboxymethyl cellulose; and the high temperature resistant agent may be aluminosilicate.

[0032] The polyphenylene sulfide injection-molded conductive component 110 includes an injection-molded main body 111 and an injection-molded bottom 112 disposed below the injection-molded main body 111. A polymer material conductive component 120 is injection-molded onto the outer surface of the injection-molded main body 111. This allows the polyphenylene sulfide injection-molded conductive component 110 to be stably positioned between the terminal 1 and the battery top cover 2.

[0033] The polymer conductive component 120 is located in the middle of the injection molded body 111. This structure is beneficial for the lithium-ion battery injection molded part to have better structural strength.

[0034] The injection-molded body 111, injection-molded base 112, and polymer conductive component 120 all have quadrilateral structures. The four corners of the outer periphery of the injection-molded body 111 and the four corners of the outer periphery of the injection-molded base 112 are rounded. The four corners of the polymer conductive component 120 are also rounded. This structure gives the lithium-ion battery injection molded part a good structural strength.

[0035] The lithium-ion battery cover assembly of this embodiment includes: a battery cover 2, a terminal 1, and a lithium-ion battery injection molded part. The lithium-ion battery injection molded part is injection-molded between the terminal 1 and the housing; the lithium-ion battery injection molded part is sleeved on the outer surface of the terminal 1. The lithium-ion battery injection molded part can be stably arranged between the terminal 1 and the battery cover 2.

[0036] The battery system of this embodiment includes: a lithium-ion battery top cover assembly.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A lithium-ion battery injection molded part for connecting a pole (1) and a battery top cover (2); characterized in that: include: A polyphenylene sulfide injection-molded conductive component (110) and a polymer material conductive component (120) injection-molded on the outside of the polyphenylene sulfide injection-molded conductive component (110); the inner side surface of the polyphenylene sulfide injection-molded conductive component (110) is adhered to the outside of the pole (1), and the outer side surface of the polyphenylene sulfide injection-molded conductive component (110) is adhered to the battery top cover (2).

2. The lithium-ion battery injection molded part according to claim 1, characterized in that: The polymer material conductive component (120) is made of carbon nanotubes, conductive fibers, steel reinforcement, adhesive or high temperature resistant agent.

3. The lithium-ion battery injection molded part according to claim 2, wherein: The conductive fiber is carbon black fiber; the steel reinforcing agent is gallium or arsenic; the adhesive is carboxymethyl cellulose adhesive; and the high temperature resistant agent is aluminosilicate.

4. The lithium-ion battery injection molded part according to claim 1, wherein: The polyphenylene sulfide injection-molded conductive component (110) comprises an injection-molded main body (111) and an injection-molded bottom (112) disposed below the injection-molded main body (111); the polymer material conductive component (120) is injection-molded on the outer surface of the injection-molded main body (111).

5. The lithium-ion battery injection molded part according to claim 4, characterized in that: The polymer material conductive component (120) is located in the middle of the injection molded body (111).

6. The lithium-ion battery injection molded part according to claim 4, characterized in that: The injection-molded body (111), the injection-molded bottom (112) and the polymer material conductive component (120) are all quadrilateral structures; the four corners of the outer peripheral surface of the injection-molded body (111) are all rounded, the four corners of the outer peripheral surface of the injection-molded bottom (112) are all rounded; and the four corners of the polymer material conductive component (120) are all rounded.

7. A lithium-ion battery top cover assembly, comprising: A battery top cover (2), a pole (1), and a lithium-ion battery injection molded part according to any one of claims 1 to 6, wherein the lithium-ion battery injection molded part is injection molded between the pole (1) and the battery top cover (2); and the lithium-ion battery injection molded part is sleeved on the outer surface of the pole (1).

8. A battery system comprising: The lithium-ion battery top cover assembly as claimed in claim 7.

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