Anti-extrusion injection molding lithium battery shell

Abstract

The utility model discloses an anti-extrusion injection molding lithium battery shell. The anti-extrusion injection molding lithium battery shell comprises a shell and a bottom plate, the bottom plate is mounted at the bottom of the shell so as to form a mounting space for mounting a battery cell together with the shell; a partition box is mounted in the mounting space of the shell in an embedded manner; partition plates are formed in the partition box. A plurality of convex ribs used for abutting against the battery cells inserted into the mounting space are correspondingly formed on two sides of the partition plate; the partition box is made of an aluminum alloy material; the bottom plate is made of an aluminum alloy material; the bottom plate is fixed to the bottom of the partition box through screws. The shell is made of plastic with flexible performance; the shell and the partition box are integrally formed through injection molding; slots for inserting the partition plates and the bottoms of the partition boxes are formed in the bottom plate; the side edge of the slot is provided with an abutting protrusion used for abutting against and limiting the battery cell. According to the anti-extrusion injection molding lithium battery shell disclosed by the utility model, the insulating property is ensured by adopting the shell made of plastics, and meanwhile, extremely strong anti-compression protection can be provided by utilizing the embedded partition box.

Description

Technical Field

[0001] The utility model relates to an injection-molded lithium battery shell that is resistant to extrusion. Background Art

[0002] At present, the common installation schemes for conventional 12V soft-pack lithium battery packs in the market are as follows: installing and fixing the soft-pack lithium battery pack by using steel plates and bolts to provide clamping force. This installation method has no clamping force on the soft-pack lithium battery pack; directly fixing the soft-pack lithium battery pack with strapping tape, the installation structure is not firm; installing plastic brackets on the outer contour of a single-pack battery cell and installing it into groups through plastic brackets. This installation method has uneven clamping force and will cause poor battery cell function. The above methods all require manual work, cannot achieve automated production, and cannot be installed into the shell through automated machinery. Utility Model Content

[0003] The utility model provides an anti-extrusion injection-molded lithium battery housing to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0004] An injection-molded lithium battery shell that resists extrusion comprises: a shell and a bottom plate; the bottom plate is installed at the bottom of the shell to form an installation space for installing battery cells together with the shell; the shell is embedded with a partition box for limiting the installation of the battery cells in the installation space; the partition box is formed with a partition for dividing the installation space into two halves; a plurality of convex ribs for resisting the battery cells inserted into the installation space are formed on both sides of the partition; the bottom plate is fixed to the bottom of the partition box by screws; the shell and the partition box are integrally formed by injection molding; the bottom plate is formed with a slot for inserting the partition and the bottom of the partition box; the side of the slot is provided with a resisting protrusion for resisting the limiting battery cells.

[0005] Furthermore, the abutting protrusions and the convex ribs are both formed of rubber having flexible properties.

[0006] Furthermore, flanges for limiting the battery cells are formed at the four corners of the two separated installation spaces so as to form heat dissipation gaps between the two ends of the battery cells and the inner wall of the partition box.

[0007] Furthermore, heat dissipation holes for heat dissipation are respectively formed on both ends of the shell corresponding to the two heat dissipation gaps.

[0008] Furthermore, an anti-collision protrusion is formed at the upper end of the shell for protecting the partition box from above to prevent the partition box from being hit.

[0009] Furthermore, the projection area of ​​the bottom plate is greater than or equal to the projection area of ​​the shell to improve the placement stability of the anti-extrusion injection-molded lithium battery shell.

[0010] Furthermore, the bottom plate is formed with liquid seepage holes for leaked electrolyte to seep out and for ventilation and heat dissipation.

[0011] Furthermore, the bottom plate is also formed with fixing ears for fixing the entire anti-extrusion injection-molded lithium battery shell; and the shell is formed with reinforcing ribs on both sides of the fixing ears for strengthening the structural performance of the shell.

[0012] Furthermore, the partition box is made of aluminum alloy material; the bottom plate is made of aluminum alloy material; and the shell is made of plastic with flexible properties.

[0013] Furthermore, both ends of the shell are provided with handles for carrying the extrusion-resistant injection-molded lithium battery shell.

[0014] The utility model is beneficial in that the provided anti-extrusion injection-molded lithium battery shell has a metal part embedded inside the shell, namely a partition box, and the partition box and the shell are injection-molded and embedded into a whole, which improves the shell's anti-extrusion performance and structural strength. The use of the installation space to place the battery cells also improves the efficiency of automated assembly, and the partition box can continuously clamp and fix the soft-pack battery cells to ensure the clamping force of the soft-pack cells, thereby improving the working capacity of the cells. In this way, while the plastic shell is used to ensure insulation performance, the embedded partition box can provide extremely strong pressure protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 is a schematic diagram of an anti-extrusion injection-molded lithium battery housing involved in the present application;

[0017] Figure 2 yes Figure 1 A schematic diagram of another perspective of the extrusion-resistant injection-molded lithium battery housing;

[0018] The anti-extrusion injection-molded lithium battery shell 10 includes a shell 11, a heat dissipation hole 111, an anti-collision protrusion 112, a reinforcing rib 113, a handle 114, a bottom plate 12, a seepage hole 121, a fixing ear 122, a slot 123, a partition box 13, a partition 131, a rib 132, a heat dissipation gap 133, a flange 134, and a contact protrusion 14. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] like Figures 1 to 2 As shown, an anti-extrusion injection-molded lithium battery shell 10 of the present application includes: a shell 11 and a bottom plate 12. The bottom plate 12 is installed at the bottom of the shell 11 to form an installation space together with the shell 11 for installing battery cells. The shell 11 is embedded with a partition box 13 in the installation space to limit the installation of the battery cells. The partition box 13 is formed with a partition 131 to divide the installation space into two halves, so that different numbers of battery cells can be loaded to adjust the storage capacity according to the power demand. A plurality of convex ribs 132 are formed on both sides of the partition 131 to resist the battery cells inserted into the installation space, so as to compress the battery cells and ensure the stability of the battery cell installation structure without shaking.

[0023] Specifically, the partition box 13 is made of aluminum alloy material, and the bottom plate 12 is made of aluminum alloy material. Such a structure has high strength, extrusion resistance, and good heat dissipation. The bottom plate 12 is fixed to the bottom of the partition box 13 by screws, and the installation structure is simple and firm. The shell 11 is made of plastic with flexible properties, so as to ensure a certain buffering performance against external impact force, thereby improving the extrusion resistance and having a shock-absorbing effect on the internal battery cells. The shell 11 and the partition box 13 are both integrally formed by injection molding, and the overall structural performance is higher. The bottom plate 12 is formed with a slot 123 for inserting the partition 131 and the bottom of the partition box 13, thereby improving the stability of the connection structure between the bottom plate 12 and the partition box 13. The side of the slot 123 is provided with a resisting protrusion 14 for resisting the installation position of the limiting battery cell, so that there is a certain installation gap between the battery cell and the bottom plate 12, which is convenient for heat dissipation and can also reduce the impact of the shell 11 on the battery cell when it is vibrated.

[0024] Therefore, the above-mentioned anti-extrusion injection-molded lithium battery shell 10 has a metal part embedded inside the shell 11, namely, a partition box 13, and the partition box 13 and the shell 11 are injection-molded and embedded into a whole, which improves the shell 11's anti-extrusion performance and structural strength. The use of the installation space to place the battery cells also improves the efficiency of automated assembly, and the partition box 13 can continuously clamp and fix the soft-pack battery cells to ensure the clamping force of the soft-pack cells, thereby improving the working capacity of the cells. In this way, while the plastic shell is used to ensure insulation performance, the embedded partition box 13 can provide extremely strong pressure protection.

[0025] As a specific implementation manner, the abutting protrusion 14 and the convex rib 132 are both formed of rubber with flexible properties, so as to effectively protect the battery cell and realize the shock absorbing function of the battery cell.

[0026] As a specific implementation, flanges 134 are formed at the four corners of the two separated installation spaces, and the flanges 134 can limit the battery cell so that a heat dissipation gap 133 is formed between the two ends of the battery cell and the inner wall of the partition box 13, effectively improving the heat dissipation of the battery cell by the entire injection-molded lithium battery housing 10 that resists extrusion. The housing 11 is respectively formed with heat dissipation holes 111 at both ends corresponding to the two heat dissipation gaps 133 for heat dissipation, so as to further improve the heat dissipation.

[0027] As a specific implementation, an anti-collision protrusion 112 is formed at the upper end of the shell 11 , and the anti-collision protrusion 112 is used to protect the partition box 13 from above to prevent the partition box 13 from being hit.

[0028] As a specific implementation, the projection area of ​​the bottom plate 12 is greater than or equal to the projection area of ​​the shell 11 to improve the placement stability of the anti-extrusion injection-molded lithium battery shell 10.

[0029] As a specific implementation, the bottom plate 12 is formed with a liquid seepage hole 121, through which not only the leaked electrolyte can seep out, but also ventilation and heat dissipation can be performed.

[0030] As a specific implementation, the bottom plate 12 is further formed with a fixing ear 122, through which the entire anti-extrusion injection-molded lithium battery housing 10 can be fixed to ensure the stability of the battery during use.

[0031] As a specific implementation, the housing 11 is provided with reinforcing ribs 113 on both sides of the fixing ears 122 to strengthen the structural performance of the housing 11 .

[0032] As a specific implementation, handles 114 are provided at both ends of the housing 11 for carrying the extrusion-resistant injection-molded lithium battery housing 10 .

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. An anti-extrusion injection-molded lithium battery casing, characterized in that: Including: a shell and a bottom plate; The bottom plate is mounted on the bottom of the shell to form an installation space for installing the battery cell together with the shell; The housing is embedded with a partition box in the installation space for limiting the installation of the battery cell; The partition box is formed with a partition for dividing the installation space into two halves; A plurality of convex ribs are formed on both sides of the partition for resisting the battery cell inserted into the installation space; The bottom plate is fixed to the bottom of the partition box by screws; The shell and the partition box are integrally formed by injection molding; The bottom plate is formed with slots for inserting the partition plate and the bottom of the partition box; The side of the slot is provided with a contact protrusion for contacting the limiting battery core.

2. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: The interference protrusion and the convex rib are both formed of rubber with flexible properties.

3. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: The four corners of the two separated installation spaces are all formed with flanges for limiting the battery core so that a heat dissipation gap is formed between the two ends of the battery core and the inner wall of the partition box.

4. The extrusion-resistant injection-molded lithium battery housing according to claim 3, characterized in that: The shell is provided with heat dissipation holes at two ends corresponding to the two heat dissipation gaps for heat dissipation.

5. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: An anti-collision protrusion is formed at the upper end of the shell for protecting the partition box from above the partition box to prevent the partition box from being hit.

6. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: The projected area of ​​the bottom plate is greater than or equal to the projected area of ​​the shell to improve the placement stability of the anti-extrusion injection-molded lithium battery shell.

7. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: The bottom plate is formed with liquid seepage holes for leaked electrolyte to seep out and for ventilation and heat dissipation.

8. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: The bottom plate is also formed with fixing ears for fixing the anti-extrusion injection-molded lithium battery housing as a whole; The shell is provided with reinforcing ribs on both sides where the fixing ears are provided, for reinforcing the structural performance of the shell.

9. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: The partition box is made of aluminum alloy material; The bottom plate is made of aluminum alloy material; The housing is made of plastic with flexible properties.

10. The extrusion-resistant injection-molded lithium battery housing according to claim 1, characterized in that: Both ends of the shell are provided with handles for carrying the anti-extrusion injection-molded lithium battery shell.

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