TW202245324A - Battery box and battery assembly - Google Patents

Abstract

A battery box is configured to accommodate a plurality of batteries. The battery box includes a wall body and a plurality of support structures. The wall body has an accommodation space. The support structures are located in the accommodation space and connected to two opposite sides of the wall body so as to divide the accommodation space into a plurality of chambers. The wall body and the support structures are made of a single piece and are made from a thermal conductive material. The chambers are respectively configured to accommodate the batteries.

Description

Battery box and battery assembly

The invention relates to a battery box and a battery assembly, in particular to a battery box with multiple supporting structures inside and a battery assembly with a battery casing inside.

Electric vehicles, such as electric motorcycles or electric bicycles, are driven by converting electrical energy into kinetic energy, and the electric energy source of the electric vehicles is provided by batteries. Generally speaking, the electric vehicle has a plurality of batteries, and these batteries are accommodated in the battery box.

In order to dissipate the heat generated by these batteries during use or fast charging, the industry currently designs the battery case as a heat-conducting material in order to conduct away the heat generated by the battery. However, such a battery box can only absorb the heat generated by the battery near the inner wall of the battery box, and the heat generated by the battery located in the center of the battery box is not easy to conduct to the battery box, resulting in a certain amount of heat still accumulated in the battery box. Battery life is reduced and even raises safety concerns. In addition, most of the current methods in the industry to improve the structural strength of the battery box are to thicken the side wall of the battery box. However, this method will increase the weight of the battery box, causing users to struggle to hold the battery box. Therefore, manufacturers are currently working on solving the aforementioned problems.

The present invention provides a battery box and a battery assembly to solve the problems of poor heat dissipation of the battery box and difficulty in balancing weight and structural strength in the prior art.

A battery box disclosed in an embodiment of the present invention is used for accommodating a plurality of batteries, and includes an outer wall and a plurality of supporting structures. The outer wall has an accommodating space. These supporting structures are located in the accommodation space and connected to two opposite sides of the outer wall, and divide the accommodation space into a plurality of accommodation slots. The façades are integral with these supporting structures and are thermally conductive. These accommodating grooves are respectively used for accommodating the batteries.

A battery assembly disclosed in another embodiment of the present invention includes a battery case, a plurality of batteries and a plurality of battery casings. The battery box has an accommodating space, and the battery box is made of heat-conducting material. These battery casings are arranged in the containing space and are in thermal contact with the battery case. Each of the battery casings includes four walls, and the four walls of each battery casing are integrally connected to form an accommodating groove. The accommodating groove of each battery housing accommodates at least one battery.

According to the battery box and the battery assembly disclosed in the above-mentioned embodiments, these supporting structures are integrally formed with the outer wall and are made of heat-conducting material, and these supporting structures divide the accommodating space of the outer wall into a plurality of accommodating slots, or form an accommodating The configuration of the thermal contact between the battery case of the slot and the battery box allows the heat generated by each battery contained in the slot to be conducted to the outer wall through the support structure or to the battery box through the battery case, so that the battery box can be effectively Conduct all heat generated by the battery away.

In addition, these supporting structures or these battery casings can maintain the structural strength of the overall battery box, or help the battery box resist unexpected external forces, thereby reducing the risk of damage.

The above description of the content of the present invention and the following description of the implementation are used to demonstrate and explain the principle of the present invention, and provide further explanation of the patent application scope of the present invention.

Please refer to Figure 1 and Figure 2. FIG. 1 is an exploded schematic diagram of a battery case disclosed according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of FIG. 1 .

In this embodiment, the battery box 10 is used to accommodate a plurality of batteries 1 . The battery box 10 includes an outer wall 11 and a plurality of supporting structures 12 . The outer wall 11 has an accommodating space 111 , and the outer wall 11 includes two opposite first side walls 113 and two opposite second side walls 114 . The two first side walls 113 and the two second side walls 114 are connected together to form the accommodating space 111 . The supporting structures 12 are located in the accommodation space 111 of the outer wall 11 . Two opposite sides of each supporting structure 12 are respectively connected to two first side walls 113 . In this embodiment, the supporting structures 12 are integrally formed with the outer wall 11 and made of heat-conducting material. The supporting structures 12 divide the accommodating space 111 into a plurality of accommodating slots 1111 , and the accommodating slots 1111 are respectively used for accommodating the batteries 1 . Each containing groove 1111 has two opposite openings 11111 . In this embodiment, the battery case 10 is used to connect a base 2 and a cover 3 . In detail, the base 2 and the cover 3 are, for example, made of heat-conducting materials, such as aluminum alloy. The base 2 and the cover 3 are respectively installed on two opposite sides of the outer wall 11 to cover the accommodating grooves 1111 .

In this embodiment, these supporting structures 12 are integrally formed with the outer wall 11 and are made of heat-conducting material, and these supporting structures 12 divide the accommodating space 111 of the outer wall 11 into a plurality of accommodating grooves 1111, allowing each accommodating The heat generated by the battery 1 in the accommodating groove 1111 can be conducted to the outer wall 11 , as well as the base 2 and the cover 3 through the support structure 12 , so that the battery box 10 can effectively conduct all the heat generated by the battery 1 away. In other embodiments of the present invention, the outer wall 11, the base 2, and the cover 3 are heat dissipation structures, and the outer surfaces of the outer wall 11, the base 2, and the cover 3 can be designed to be wave-shaped to increase the heat dissipation area ( As shown in Figure 3). That is to say, the outer surfaces of the base and the cover shown in Figures 1, 6, and 8 can be designed to be waved to increase the heat dissipation area.

In addition, compared with the conventional design of battery boxes without supporting structures that need to increase the thickness of the side walls to meet the structural strength requirements, this embodiment forms the supporting structures 12 and the outer walls 11 in an integrated manner, so that the outer walls can be integrated. The material of the wall 11 is allocated to these supporting structures 12 , so that the requirement of structural strength can be met through these supporting structures 12 without increasing the weight of the battery box 10 .

Furthermore, in order to meet the weight and structural strength requirements of the battery box 10 at the same time, the material of the outer wall 11 is distributed to these support structures 12, so that the support structure can be increased without increasing the weight of the battery box 10. The number of structures 12 will make the thickness of the outer wall 11 thinner; reducing the number of supporting structures 12 will make the thickness of the outer wall 11 thicker. It can be seen that, under the condition that the weight of the battery box 10 remains constant, the thickness of the outer wall 11 is inversely proportional to the number of these support structures 12 .

In this embodiment, the material of the outer wall 11 and these supporting structures 12 is pitch-based carbon fiber, and the fibers F1 of the outer wall 11 and the fibers F2 of these supporting structures 12 are opened toward the other along one opening 11111 of the accommodating groove 1111 11111 extends in direction D1. Thereby, the efficiency of heat conduction from the outer wall 11 to the base 2 and the cover 3 can be improved, the overall structural strength can be enhanced, and the weight of the battery box 10 can be reduced.

It should be noted that the material of the outer wall 11 and the supporting structures 12 is not limited to pitch-based carbon fiber. In other embodiments, the outer wall 11 and the supporting structures 12 can be made of other suitable heat-conducting materials, such as aluminum alloy.

Next, please refer to FIG. 3 . FIG. 3 is a schematic cross-sectional view of a battery case disclosed according to a second embodiment of the present invention.

The battery box 10 a of this embodiment is similar to the battery box 10 of the embodiment shown in FIG. 2 , so only the main differences between the two will be described below, and the same parts will not be repeated.

In this embodiment, the outer surface 1131a of the two first side walls 113a of the outer wall 11a of the battery box 10a facing away from the accommodating space 111a and the outer surface 1141a of the two second side walls 114a facing away from the accommodating space 111a are in waves shape. Thereby, the area of the outer surface of the outer wall 11a can be increased, and the efficiency of heat exchange between the battery box 10a and the air can be enhanced.

Next, please refer to FIG. 4 and FIG. 5 . FIG. 4 is a schematic cross-sectional view of a battery case disclosed according to a third embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a battery case disclosed according to a fourth embodiment of the present invention.

Both the battery box 10b in FIG. 4 and the battery box 10c in FIG. 5 are similar to the battery box 10 in FIG. 2 , so only the main differences between them will be described below, and the same parts will not be repeated.

As shown in FIG. 4 , the thickness of each first sidewall 113b gradually decreases from its central portion 1132b toward its two opposite sides, and the thickness of each second sidewall 114b gradually decreases from its central portion 1142b toward its opposite two sides. Thereby, the structural strength of the battery case 10b can be enhanced. In this embodiment, the outer surface 1131b of each first sidewall 113b facing away from the accommodating space 111b and the outer surface 1141b of each second sidewall 114b facing away from the accommodating space 111b are arc-shaped.

Similarly, as shown in FIG. 5 , the thickness of each first side wall 113c decreases gradually from its central portion 1132c toward its opposite sides, and the thickness of each second side wall 114c decreases gradually from its central portion 1142c toward its opposite sides. . Thereby, the structural strength of the battery case 10c can be enhanced. In this embodiment, the outer surface 1131c of each first sidewall 113c facing away from the accommodating space 111c and the outer surface 1141c of each second sidewall 114c facing away from the accommodating space 111c have sharp corners.

The aforementioned thicknesses of each first side wall and each second side wall gradually decrease from the central portion to the two opposite sides thereof, but the present invention is not limited thereto. In other embodiments, only the thicknesses of the two first side walls or the thicknesses of the two second side walls are gradually reduced from the central portion to the opposite sides thereof.

Next, please refer to FIG. 6 and FIG. 7 . FIG. 6 is an exploded schematic diagram of a battery assembly disclosed according to a fifth embodiment of the present invention. FIG. 7 is a schematic cross-sectional view of the battery assembly in FIG. 6 .

In this embodiment, the battery assembly 100d includes a battery box 10d, a plurality of battery casings 20d and a plurality of batteries 30d. In addition, in this embodiment or other embodiments, the battery assembly 100d may further include a base 40d and a cover 50d.

The battery box 10d is made of heat-conducting material, such as pitch-based carbon fiber. The battery box 10d has an accommodating space 11d and two openings 12d, and the battery box 10d includes two opposite first side walls 13d and two opposite second side walls 14d. The two first sidewalls 13d and the two second sidewalls 14d are integrally connected to form the accommodating space 11d, and the two openings 12d are respectively located on opposite sides of the accommodating space 11d and communicated with the accommodating space 11d.

These battery casings 20d have the same structure, so only one of the battery casings 20d will be described in detail below. The battery casing 20d is made of heat-conducting material, such as pitch-based carbon fiber. The battery case 20d has an accommodating groove 21d and two openings 22d, and the battery case 20d includes four wall portions 23d. The four wall parts 23d are integrally connected to form the receiving groove 21d together, and the two openings 22d are respectively located on opposite sides of the receiving groove 21d and communicate with the receiving groove 21d.

Each accommodating groove 21d of the battery case 20d accommodates a battery 30d. These battery casings 20d are installed in the accommodating space 11d of the battery box 10d, and two opposite wall portions 23d of each battery casing 20d respectively lean against and thermally contact with two first side walls 13d of the battery box 10d. For example, the two openings 22d of the battery case 20d are coplanar with the two openings 12d of the battery case 10d respectively. That is to say, the two openings 22d of the battery casing 20d are flush with the two openings 12d of the battery box 10d respectively.

However, the two openings 22d of the battery casing 20d are not limited to be flush with the two openings 12d of the battery case 10d respectively. In other embodiments, the two openings of the battery casing can maintain a distance from the two openings of the battery case.

In this embodiment, the base 40d and the cover 50d are, for example, made of heat-conducting materials, such as aluminum alloy. The base 40d and the cover 50d are respectively installed at the two openings 12d of the battery box 10d to cover the accommodating space 11d.

In this embodiment, the heat generated by each battery 30d accommodated in the accommodating groove 21d can be conducted to the battery through the battery casing 20d through the configuration that the battery casing 20d having the accommodating groove 21d is in thermal contact with the battery case 10d. The box 10d is then conducted to the base 40d and the cover 50d, so that the battery box 10d can effectively conduct away all the heat generated by the battery 30d. However, the base 40d and the cover 50d of the battery case 10d are optional components. In other embodiments, the battery case does not have a base and a cover.

In addition, the integrated design of the battery case 20d abutting against the two first side walls 13d of the battery box 10d can help the battery box 10d resist unexpected external force and reduce the risk of damage.

In this embodiment, the fibers F3 of the battery case 10d and the fibers F4 of the battery casing 20d extend from one opening 12d of the battery case 10d toward the direction D2 of the other opening 12d. Thereby, the efficiency of the battery case 10d and the battery case 20d to conduct heat to the base 40d and the cover 50d can be improved, the structural strength of the battery case 10d and the battery case 20d can be enhanced, and the battery case 10d and the battery case 20d can be made lighter. Quantify.

It should be noted that the material of the battery box 10d and the battery casing 20d is not limited to pitch-based carbon fiber. In other embodiments, the material of the battery box may be other suitable heat-conducting materials, such as aluminum alloy.

In this embodiment, the battery assembly 100d further includes a plurality of separators 60d. These spacers 60d are, for example, made of thermally conductive materials, such as aluminum alloy, carbon fiber or thermal interface material. Each separator 60d is located in the accommodating space 11d of the battery box 10d, and its two opposite sides are respectively installed on the two first side walls 13d. Each separator 60d is located between two adjacent battery cases 20d. In this way, the separators 60d can also conduct the heat generated by the battery 30d to the battery case 10d, and further help the battery case 10d to resist unexpected external force.

In this embodiment, each separator 60d has a corrugated shape, so that when each battery case 20d is deformed due to the expansion of the battery 30d inside, there is space to absorb the deformation of the battery case 20d as a buffer.

It should be noted that the separator 60d is not limited to be corrugated. In other embodiments, the partition can be a flat plate. In addition, spacers are optional components. In other embodiments, the battery assembly may be without a separator.

In this embodiment, the outer surface 131d of the two first side walls 13d of the battery box 10d facing away from the accommodating space 11d and the outer surface 141d of the two second side walls 14d facing away from the accommodating space 11d are both flat, but not This is not the limit. In other embodiments, the outer surfaces of the two first side walls and the two second side walls of the battery box facing away from the accommodating space may be wave-shaped (similar to FIG. 3 ).

In addition, the thicknesses of the two first side walls 13d and the two second side walls 14d of the battery box 10d are uniform, but not limited thereto. In other embodiments, the thickness of each first side wall may gradually decrease from its central portion toward its two opposite sides, and the thickness of each second side wall may gradually decrease from its central portion toward its opposite two sides (similar to FIG. 4 , 5).

Next, FIG. 8 is an exploded schematic diagram of a battery assembly disclosed according to a sixth embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of the battery assembly in FIG. 8 .

The battery assembly 100e of this embodiment is similar to the battery assembly 100d of the embodiment of FIG. 6 , so only the main differences between the two will be described below, and the same parts will not be repeated.

In this embodiment, more than two batteries 30e are accommodated in the accommodating groove 21e of each battery casing 20e. Taking one of the battery casings 20e as an example, the battery casing 20e includes four wall portions 23e and a plurality of partition portions 24e. The four wall parts 23e jointly form the receiving tank 21e, and the partition parts 24e are connected to two opposing wall parts 23e, and the receiving tank 21e is divided into a plurality of sub receiving tanks 211e. Each sub-accommodating slot 211e accommodates one battery 30e, so that the accommodating slot 21e of each battery case 20e accommodates a plurality of batteries 30e.

In this embodiment, the battery casings 20e are arranged in a 1×3 matrix, but it is not limited thereto. In other embodiments, they may be arranged in a matrix of different rows and columns according to actual needs. For example, please refer to FIG. 10 . FIG. 10 is an exploded view of a battery assembly disclosed according to a seventh embodiment of the present invention. In this embodiment, the battery casings 20f are arranged in a 2x3 matrix. That is to say, the present invention can be extended to an mxn matrix arrangement according to the specifications of the battery components, where m and n are positive integers greater than or equal to 1.

According to the battery box and the battery assembly disclosed in the above-mentioned embodiments, these supporting structures are integrally formed with the outer wall and are made of heat-conducting material, and these supporting structures divide the accommodating space of the outer wall into a plurality of accommodating slots, or form an accommodating The configuration of the thermal contact between the battery case of the slot and the battery box allows the heat generated by each battery contained in the slot to be conducted to the outer wall through the support structure or to the battery box through the battery case, so that the battery box can be effectively Conduct all heat generated by the battery away.

In addition, in some embodiments, by forming these support structures integrally with the exterior wall, the material of the exterior wall can be distributed to these support structures, so that the battery box can pass through These supporting structures meet the needs of structural strength.

Furthermore, in some embodiments, these battery casings can help the battery box resist unexpected external forces, thereby reducing the risk of damage.

Although the present invention is disclosed above with the aforementioned preferred embodiments, it is not intended to limit the present invention. Any person familiar with the similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of patent protection for inventions shall be defined in the scope of patent application attached to this specification.

1: battery 2: base 3: cover body 10, 10a, 10b, 10c, 10d, 10e: battery box 11, 11a: exterior walls 111, 111a, 111b, 111c, 11d: accommodation space 1111: storage tank 11111, 12d: opening 113, 113a, 113b, 113c, 13d: first side wall 1131a, 1131b, 1131c, 131d: outer surfaces 1132b, 1132c: central part 114, 114a, 114b, 114c, 14d: second side wall 1141a, 1141b, 1141c, 141d: outer surfaces 1142b, 1142c: central part 12: Support structure 20d, 20e, 20f: battery case 21d, 21e: holding tank 211e: sub storage tank 22d: opening 23d, 23e: Wall 24e: Partition 30d, 30e: battery 40d: base 50d: cover body 60d: clapboard 100d, 100e: battery components F1, F2, F3, F4: Fiber D1, D2: direction

FIG. 1 is an exploded schematic diagram of a battery case disclosed according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of FIG. 1 . FIG. 3 is a schematic cross-sectional view of a battery case disclosed according to a second embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a battery case disclosed according to a third embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a battery case disclosed according to a fourth embodiment of the present invention. FIG. 6 is an exploded schematic diagram of a battery assembly disclosed according to a fifth embodiment of the present invention. FIG. 7 is a schematic cross-sectional view of the battery assembly in FIG. 6 . FIG. 8 is an exploded schematic diagram of a battery assembly disclosed according to a sixth embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of the battery assembly in FIG. 8 . FIG. 10 is an exploded schematic diagram of a battery assembly disclosed according to a seventh embodiment of the present invention.

2: base

3: cover body

10: Battery box

11: Exterior wall

111:Accommodating space

1111: storage tank

11111: opening

113: First side wall

114: second side wall

12: Support structure

F1, F2: fiber

D1: Direction

Claims (10)

A battery box for accommodating a plurality of batteries, comprising: an outer wall having an accommodating space; The space is divided into a plurality of accommodating slots, the outer wall and the supporting structures are integrally formed and made of heat-conducting material, and the accommodating slots are respectively used for accommodating the batteries. The battery box as described in claim 1, wherein each of the accommodating tanks has two opposite openings, the material of the outer wall and the supporting structures is pitch-based carbon fiber, and the fibers of the outer wall and the supporting structures are along any One of the openings of the accommodating groove extends toward the direction of the other opening. The battery box according to claim 1, wherein the surface of the outer wall facing away from the accommodating space is wave-shaped. The battery box according to claim 1, wherein the outer wall includes two opposite first side walls and two opposite second side walls, and the two first side walls are connected with the second side walls to jointly form the container These supporting structures are all connected to the two first side walls, the thickness of each of the first side walls gradually decreases from its central part to its opposite sides, and the thickness of each of the second side walls starts from its central part tapers off towards its opposite sides. The battery box as claimed in claim 1, wherein the thickness of the outer wall is inversely proportional to the number of the supporting structures. A battery assembly, comprising: a battery box with a storage space, and the battery box is made of heat-conducting material; a plurality of batteries; and a plurality of battery casings, installed in the storage space and in thermal contact with the battery box, the Each of the battery casings includes four wall portions, and the four wall portions of each battery casing are integrally connected to jointly form an accommodating groove, and each accommodating groove of the battery casing accommodates at least one battery. The battery assembly as described in claim 6, wherein the battery box has two openings, the two openings are located on opposite sides of the accommodating space, the battery box and the battery casings are made of pitch-based carbon fiber, the battery box The fibers and the fibers of the battery case extend along one of the openings toward the other opening. The battery assembly as claimed in claim 6, wherein the surface of the battery box facing away from the accommodating space is corrugated. The battery assembly as claimed in claim 6, wherein the battery box includes two opposite first side walls and two opposite second side walls, and the two first side walls are connected with the second side walls to jointly form the container The battery casings are in thermal contact with the two first side walls, the thickness of each of the first side walls gradually decreases from its central part to its opposite sides, and the thickness of each of the second side walls starts from its The central portion tapers toward its opposite sides. The battery assembly as described in claim 6 further comprises a plurality of separators, each of which is installed in the accommodating space of the battery case and is located between the two adjacent battery casings, and these separators are in the form of wavy.

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