Soft pack battery cell module

Abstract

To provide a battery cell module for a soft pack battery. [Solution] A battery cell module 40 comprises several battery cells 42, several first coupling elements 44, and several second coupling elements 46, each battery cell being used for storing electrical energy, each first coupling element being a thin film, each second coupling element being an elastic piece, and the thickness of the second coupling element being greater than the thickness of the first coupling element, each battery cell, each first coupling element and each second coupling element being arranged in parallel along a first direction, each first coupling element being adhesively coupled to two adjacent battery cells, each second coupling element being adhesively coupled to two adjacent battery cells, and only one first coupling element or only one second coupling element being provided between two adjacent battery cells.

Description

[Technical field]

[0001] The present invention relates to a soft pack battery, and more particularly to a battery cell module of a soft pack battery. [Background technology]

[0002] Soft-pack batteries are a type of ion battery that can store and release large amounts of electrical energy and are widely used as automotive batteries and electrical energy storage devices, including but not limited to lithium-ion batteries.

[0003] A type of soft-pack battery is known that includes a battery cell module, two bus structures, a protective case, and two electrodes. The battery cell module is mainly configured with several battery cells arranged in parallel, and each of the battery cells is used to store electrical energy. Each of the battery cells has two electrode tabs, and each of the electrode tabs functions as a positive electrode or a negative electrode of the battery cell. The bus structures are provided on both ends of the battery cell module, and each of the bus structures has one to a plurality of bus bars. Each of the electrode tabs is electrically connected to an adjacent bus bar. The battery cells are connected in series or parallel through the electrode tabs and the bus bars, the protective case is used to encase and position the battery cell module, the protective case is mainly made of a metal material and provides protection for the battery cell module, the electrodes are electrically connected to one of the bus bars, and the electrodes are electrically connected to an external power transmission line or an electrical equipment, so that the battery cell module can supply power to the outside, and an external power source can charge each of the battery cells through the power transmission line.

[0004] The battery cells are arranged in parallel in sequence, and several double-sided adhesive films (connecting elements) are placed between two adjacent battery cells, and each of the double-sided adhesive films is adhered to two adjacent battery cells so that each battery cell can position and form the battery cell module. The protective case has a bottom plate, two side plates, and a cover plate, and the side plates are arranged to face each other laterally. The battery cell module is placed between the side plates, and the battery cells are arranged in sequence along the direction indicated by the side plates. The side plates clamp and regulate the battery cell modules relative to each other, and after a thermally conductive adhesive is laid around the periphery of the battery cell module, the thermally conductive adhesive is used to transfer thermal energy generated by the storage or discharge of each battery cell toward the protective case, so that the thermal energy can pass through the protective case and be dissipated outward. Summary of the Invention [Problem to be solved by the invention]

[0005] The double-sided adhesive film is a type of thin film, and the distance between two adjacent battery cells that are directly bonded via the double-sided adhesive film is very small. When one of the battery cells generates heat, the thermal energy easily passes through the double-sided adhesive film and is transferred to the other adjacent battery cell. As a result, the other battery cell will experience an increase in temperature when exposed to heat, which may affect its storage and discharge capabilities and may reduce the heat dissipation efficiency of the entire battery cell module.

[0006] The main objective of the present invention is to provide a battery cell module for soft-pack batteries. [Means for solving the problem]

[0007] To achieve the above objectives, the present invention adopts the following technical solutions:

[0008] A battery cell module of a soft-pack battery, comprising several battery cells each used for storing electric energy, several first coupling elements each being a thin film, and several second coupling elements each being a piece having a predetermined thickness,

[0009] Each of the battery cells has a predetermined length and thickness, and each of the battery cells is provided with two electrode tabs, each of which functions as a positive electrode or a negative electrode of the battery cell.

[0010] Each of the second coupling elements has elasticity in a thickness direction, and the thickness of the second coupling element is greater than the thickness of the first coupling element.

[0011] The thickness direction of each of the battery cells, each of the first connecting elements, and each of the second connecting elements is defined as a first direction, each of the battery cells, each of the first connecting elements, and each of the second connecting elements are arranged in parallel along the first direction, the length direction of each of the battery cells is defined as a second direction, the second direction is perpendicular to the first direction, and each of the battery cells has one of the electrode tabs disposed at both ends in the second direction.

[0012] Each of the first coupling elements is located between two of the battery cells, and each of the first coupling elements is attached to the two adjacent battery cells, and each of the second coupling elements is located between two of the battery cells, and each of the second coupling elements is attached to the two adjacent battery cells, and only one of the first coupling elements or only one of the second coupling elements is provided between two adjacent battery cells along the first direction. Effect of the Invention

[0013] Each of the second connecting elements can increase the distance between two adjacent battery cells adhesively connected thereto, thereby reducing the effect of mutual transfer of thermal energy between two adjacent battery cells along the first direction, and improving the overall heat dissipation efficiency. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view of a soft-pack battery having a preferred embodiment of the present invention; FIG. [Diagram 2] 1 is an exploded perspective view of a soft-pack battery according to a preferred embodiment of the present invention; FIG. [Diagram 3] FIG. 2 is an exploded perspective view of a preferred embodiment of the present invention; [Figure 4] FIG. 2 is a top view of the preferred embodiment of the present invention and a bus structure; [Diagram 5] 5 is an enlarged partial view of FIG. 4, showing the enclosed area designated by the numeral 5; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] As shown in FIG. 1 and FIG. 2, a soft-pack battery 01 includes a protective case 10, two bus structures 20, two electrodes 30, and one battery cell module 40 as illustrated in a preferred embodiment, wherein the protective case 10 is mainly made of metal material, the protective case 10 has a bottom plate 12, two side plates 14, and a cover plate 16, the bottom plate 12 is used to mount the battery cell module 40, the side plates 14 are arranged to face each other in the lateral direction, the cover plate 16 is connected to each side plate 14, and the side plates 14 are respectively connected to the bottom plate 12, the battery cell module 40 is located between the side plates 14, and the battery cell module 40 is located between the bottom plate 12 and the cover plate 16, and the protective case 10 provides protection for the battery cell module 40.

[0016] As shown in FIG. 3, FIG. 4 and FIG. 5, the battery cell module 40 includes several battery cells 42, among which each battery cell 42 is used for storing electric energy, each battery cell 42 has a predetermined length and thickness, and each battery cell 42 is provided with two electrode tabs 43, each electrode tab 43 functions as a positive electrode or a negative electrode of each battery cell 42, and each bus structure 20 is provided at both ends of the battery cell module 40, and each electrode tab 43 is electrically connected to one adjacent bus structure 20. By being connected, each of the battery cells 42 forms a series connection or parallel connection through each of the electrode tabs 43 and each of the bus structures 20, and each of the electrodes 30 is used to electrically connect to an external power transmission line (not shown in the figure) or electrical equipment (not shown in the figure), and each of the electrodes 30 is electrically connected to one of the bus structures 20, allowing the battery cell module 40 to supply power to the electrical equipment and enabling the external power source to charge each of the battery cells 42, and the above-mentioned configuration is similar to the prior art.

[0017] The battery cell module 40 further includes several first connecting elements 44 and several second connecting elements 46, among which each of the first connecting elements 44 is a thin film, each of the second connecting elements 46 is a piece having a predetermined thickness, and each of the second connecting elements 46 has elasticity in the thickness direction, such that each of the second connecting elements 46 can be elastically compressed or elastically expanded in the thickness direction, and the thickness of the second connecting element 46 is greater than that of the first connecting element 44. Specifically, each of the first connecting elements 44 is formed by selecting and using a double-sided adhesive film, and each of the second connecting elements 46 is formed by selecting and using foam rubber mainly made of a foam material.

[0018] The thickness direction of each of the battery cells 42, each of the first connecting elements 44, and each of the second connecting elements 46 is defined as a first direction 92, each of the battery cells 42, each of the first connecting elements 44, and each of the second connecting elements 46 are arranged in parallel along the first direction 92, the length direction of each of the battery cells 42 is defined as a second direction 94, and the second direction 94 and the first direction 92 are perpendicular to each other, each of the battery cells 42 has one of the electrode tabs 43 arranged at both ends of the second direction 94, the width direction of each of the battery cells 42 is defined as a third direction 96, and the first direction 92 and the second direction 94 are each perpendicular to the third direction 96, and the bottom plate 12, the battery cell module 40, and the cover plate 16 are sequentially arranged along the third direction 96.

[0019] Each of the first connection elements 44 is located between two of the battery cells 42, and each of the first connection elements 44 is respectively attached to the two adjacent battery cells 42, and each of the second connection elements 46 is located between two of the battery cells 42, and each of the second connection elements 46 is respectively attached to the two adjacent battery cells 42, and only one of the first connection elements 44 or only one of the second connection elements 46 is selected and provided between two adjacent battery cells 42 along the first direction 92.

[0020] Specifically, the fact that each of the first coupling elements 44 and each of the second coupling elements 46 are arranged so as to intersect with each other along the first direction 92 can be selected by appropriate implementation, and such an arrangement so as to intersect with each other means an arrangement in which each of the second coupling elements 46 is located between two of the first coupling elements 44 in the first direction 92.

[0021] Each of the second bonding elements 46 can increase the distance between two adjacent battery cells 42 adhesively bonded thereto, and can reduce the effect of mutual transfer of thermal energy between two adjacent battery cells 42 along the first direction 92, and can help transfer such thermal energy along the third direction 96 toward the protective case 10. Compared with the prior art, in a preferred embodiment, it is possible to improve the heat dissipation efficiency of the entire battery cell module 40.

[0022] Foam rubber is selected for use as the second coupling elements 46, as the foam material can provide good thermal insulation and further inhibits the transmission of thermal energy through each of the second coupling elements 46 along the first direction 92.

[0023] The number of the battery cells 42 is positively correlated with the total storage capacity of the battery cell module 40, and the number of the battery cells 42 is positively correlated with the heat dissipation requirements of the battery cell module 40. In a preferred embodiment, the number of the second connecting elements 46 can be selectively increased or decreased in accordance with the number of the battery cells 42, and the heat dissipation efficiency of the entire battery cell module 40 does not decrease as the number of the battery cells 42 increases.

[0024] Each second connecting element 46 can elastically deform in accordance with the expansion or contraction of each adjacent battery cell 42 in the first direction 92, and each second connecting element 46 can absorb and mitigate the relative pressure created by the expansion of the two battery cells 42 that are adhesively joined to it.

[0025] The arrangement of several of the first connecting elements 44 is designed to achieve a balance between the dimension of the battery cell module 40 in the first direction 92 and the heat dissipation efficiency of the battery cell module 40, and the dimension of the battery cell module 40 in the first direction 92 is not excessively expanded by the arrangement of the second connecting elements 46. [Explanation of symbols]

[0026] 5: Surrounding part 01: Soft pack battery 10: Protective case 12: Bottom plate 14: Side panel 16: Lid plate 20: Bus structure 30: Electrode 40: Battery cell module 42: Battery cell 43: Electrode tab 44: First coupling element 46: Second coupling element 92: 1st direction 94:Second direction 96: Third direction

Claims

1. A battery cell module of a soft-pack battery comprising several battery cells each used for storing electric energy, several first bonding elements each being a thin film, and several second bonding elements each being a piece having a predetermined thickness, each of the battery cells has a predetermined length and thickness, and two electrode tabs are provided for each of the battery cells, and each of the electrode tabs functions as a positive electrode or a negative electrode of each of the battery cells; Each of the second coupling elements has elasticity in a thickness direction, and the thickness of the second coupling element is greater than the thickness of the first coupling element; a thickness direction of each of the battery cells, each of the first coupling elements, and each of the second coupling elements is defined as a first direction, each of the battery cells, each of the first coupling elements, and each of the second coupling elements are arranged in parallel along the first direction, a length direction of each of the battery cells is defined as a second direction, the second direction and the first direction are perpendicular to each other, and each of the battery cells has one of the electrode tabs disposed at both ends in the second direction; a battery cell module for a soft-pack battery, characterized in that each of the first bonding elements is located between two of the battery cells, and each of the first bonding elements is respectively attached to the two battery cells adjacent thereto, and each of the second bonding elements is located between two of the battery cells, and each of the second bonding elements is respectively attached to the two battery cells adjacent thereto, and only one of the first bonding element or only one of the second bonding elements is provided between two of the battery cells adjacent along the first direction.

2. 2 . The battery cell module of the soft-pack battery according to claim 1 , wherein each of the first connecting elements and each of the second connecting elements are arranged so as to intersect with each other along the first direction.

3. 2. The battery cell module of a soft-pack battery as claimed in claim 1, wherein each of the first connecting elements is a double-sided adhesive film.

4. 2. The battery cell module of the soft-pack battery according to claim 1, wherein each of the second connecting elements is mainly made of a foam material.

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