CN110896137A

CN110896137A - Battery system

Info

Publication number: CN110896137A
Application number: CN201811066919.5A
Authority: CN
Inventors: 邱普德; 李文枢; 庄少棋; 张文斌
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2018-09-13
Filing date: 2018-09-13
Publication date: 2020-03-20
Anticipated expiration: 2038-09-13
Also published as: CN110896137B

Abstract

The invention provides a battery system which comprises at least two battery modules, a plurality of first connecting pieces and a plurality of second connecting pieces. At least two battery modules are stacked on top of each other. The plurality of first connecting pieces are configured on one of the at least two battery modules. The plurality of second connecting pieces are configured on another one of the at least two battery modules. Each first connecting piece and each second connecting piece respectively extend out of at least two battery modules. Each second connecting piece is detachably clamped with each first connecting piece so as to be electrically coupled with at least two battery modules.

Description

Battery system

Technical Field

The present invention relates to a battery system, and more particularly, to a battery system that is easy to replace and assemble.

Background

The existing battery system applied to the electric vehicle or the electric locomotive is formed by bridging a plurality of battery modules in a series connection mode or a parallel connection mode. Because lithium ion batteries have the advantages of high energy density, long cycle life, large charging power and the like, most of the current battery modules adopt lithium ion batteries.

In the conventional battery module, the battery cells in the battery module are connected in series and in parallel mainly through the metal nickel to achieve the required voltage and current, and when the battery module needs to output more power, the number of the battery cells needs to be increased or a plurality of battery modules need to be connected. Therefore, most of the existing battery systems are customized in specification, and the existing battery systems cannot be integrally applicable to all electric vehicles and electric locomotives. Because the existing battery modules are welded and are not easy to disassemble, the arrangement mode of the battery modules is limited, and when any contact or any battery in each battery module is damaged, the whole battery system needs to be replaced. For this reason, it is an important development goal in the future to develop a battery system that is easy to assemble and easy to replace the damaged area.

Disclosure of Invention

The invention provides a battery system which has the characteristics of quick assembly and easy disassembly and replacement.

The battery system of the invention comprises at least two battery modules, a plurality of first connecting pieces and a plurality of second connecting pieces. At least two battery modules are stacked on top of each other. The plurality of first connecting pieces are configured on one of the at least two battery modules. The plurality of second connecting pieces are configured on another one of the at least two battery modules. Each first connecting piece and each second connecting piece respectively extend out of at least two battery modules. Each second connecting piece is detachably clamped with each first connecting piece so as to be electrically coupled with at least two battery modules.

Based on the above, the battery system of the invention includes a plurality of modularized first connecting members and a plurality of modularized second connecting members, which are respectively configured on at least two battery modules. The at least two battery modules are stacked up and down, and the plurality of first connecting pieces are respectively clamped with the plurality of first connecting pieces and are electrically coupled with the at least two battery modules. Because the invention adopts the assembly mode of stacking and mutually clamping, and has the characteristic of easy disassembly and assembly, when one battery module is damaged, only the damaged battery module needs to be taken down and replaced by a new battery module, and the battery modules do not need to be completely replaced.

Drawings

Fig. 1A is a schematic perspective view of a battery system according to an embodiment of the invention.

Fig. 1B is an exploded schematic view of the battery module of fig. 1A.

Fig. 1C is a schematic cross-sectional view of the battery system of fig. 1A taken along section a-a.

Fig. 1D is a schematic plan view of a combination of two battery modules of the battery system of fig. 1A.

Fig. 1E is an enlarged schematic view of a portion of the components of the battery system of fig. 1D.

Fig. 2A is a schematic cross-sectional view of a portion of the components of the battery system of fig. 1A taken along section B-B.

Fig. 2B-2C are schematic diagrams illustrating disassembly and assembly of the first connector and the second connector of the battery system of fig. 2A.

Description of reference numerals:

100: a battery system;

110. 110a, 110 b: a battery module;

111: a frame;

112: a battery cell;

120: a first connecting member;

121: an elastic hook part;

130: a second connecting member;

131: a neck portion;

132: a spring piece portion;

140: a control panel;

150: an upper cover;

160: a lower cover;

170: fixing the disc;

c: a central part;

f: an external force;

g: a trench;

o: perforating;

p: a horizontal direction;

r: a cylinder;

v: a vertical direction;

d1, D2: a distance;

e1, E2: an electrode;

t1: the outside thickness;

t2: the inside thickness;

w1, W2: a width;

AS: an accommodating space;

LD: and (4) the length direction.

Detailed Description

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1A is a schematic perspective view of a battery system according to an embodiment of the invention. Fig. 1B is an exploded schematic view of the battery module of fig. 1A. Fig. 1C is a schematic cross-sectional view of the battery system of fig. 1A taken along section a-a. Fig. 1D is a schematic plan view of a combination of two battery modules of the battery system of fig. 1A. Fig. 1E is an enlarged schematic view of a portion of the components of the battery system of fig. 1D.

Referring to fig. 1A to 1C, the battery system 100 of the present embodiment is, for example, a finished product formed by combining a plurality of battery modules (two battery modules are taken as an example in the present embodiment) and a battery monitoring and management device, and is used as a power storage device for supplying power to an electric locomotive or an electric vehicle, and the voltage and current specifications of the battery system 100 are determined according to the required power supply requirements. The battery system 100 of the present embodiment includes at least two battery modules 110, a plurality of first connectors 120, a plurality of second connectors 130, a control board 140, an upper cover 150, and a lower cover 160.

In the present embodiment, at least two battery modules 110 include two battery modules, and the two battery modules (110a, 110b) are stacked on each other, i.e., the battery module 110b is stacked above the battery module 110 a.

Please refer to fig. 1D and 1E together. The plurality of first connectors 120 are disposed on the battery module 110 a. The second connecting members 130 are disposed on the battery module 110 b. Each of the first connecting members 120 and each of the second connecting members 130 extend out of the two

battery modules

110a and 110b, respectively. Each second connector 130 is detachably engaged with each first connector 120 to electrically couple the two

battery modules

110a and 110 b. Each of the first connecting members 120 and each of the second connecting members 130 extend along the length direction LD of the two

battery modules

110a and 110b, and the plurality of first connecting members 120 and the plurality of second connecting members 120 are disposed at intervals. The plurality of first connectors 120 are respectively aligned with the corresponding plurality of second connectors 130. Further, the two

battery modules

110a and 110b are connected in series with each other through the first connecting members 120 and the second connecting members 130 to increase the output voltage of the battery system 100 or connected in parallel to increase the output current of the battery system 100, for example, but the invention is not limited thereto.

In addition, each of the first connecting elements 120 and each of the second connecting elements 130 are made of nickel metal or other metal materials with conductive properties.

The control board 140 is electrically coupled to the two

battery modules

110a and 110 b. As a core of the control and monitoring of the battery system, the operation process of the battery system 100 can be controlled. For example, when the control board 140 receives an acceleration command or a deceleration command of the electric vehicle or the electric locomotive, the output current values of the two

battery modules

110a and 110b may be adjusted to increase or decrease the rotation speed of the electric motor. In addition, the control board 140 may also monitor the temperature, current value, voltage value or other related data of the battery system 100 to determine whether the battery system 100 is operating normally.

The upper cover 150 and the lower cover 160 are connected to each other to form an accommodating space AS, and the two

battery modules

110a and 110b, the first connectors 120, the second connectors 130, and the control board 140 are disposed in the accommodating space AS. Further, the upper cover 150 and the lower cover 160 are made of, for example, a heat-resistant material or a vibration-proof material, so as to prevent the battery module from being damaged by external force or high heat.

Fig. 2A is a schematic cross-sectional view of a portion of the components of the battery system of fig. 1A taken along section B-B. Fig. 2B and 2C are schematic diagrams illustrating disassembly and assembly of the first connecting member and the second connecting member of the battery system of fig. 2A.

Refer to fig. 2A, 2B, and 1E. Each first connecting member 120 has two elastic hooks 121. A groove G is formed between the two elastic hooks 121. Each second connecting member 130 has a neck portion 131 and a spring portion 132. The center C of the elastic piece 132 is integrally connected to the neck 131.

The groove G of each first connecting member 120 accommodates the neck portion 131 of each second connecting member 130, and each elastic sheet portion 132 is engaged with the two elastic hook portions 121. The two elastic hook portions 121 of each first connecting member 120 are in elastic contact with the elastic sheet portions 132 of each second connecting member 130, so that the two elastic hook portions are electrically coupled and used for transmitting the current of the battery module.

In detail, the width W1 of each groove G is greater than the width W2 of each neck 131, so that each groove G can accommodate each neck 131. The distance D1 between each spring piece 132 and each battery module 110 is smaller than the distance D2 between each elastic hook 121 and each battery module 110, so that each spring piece 132 can be engaged with both elastic hooks. Each neck 131 is disposed between the two elastic hooks 121 and penetrates through the groove G, and two ends of each elastic sheet 132 protrude from the two elastic hooks 121, so that the two elastic hooks 121 are used to limit and block the corresponding neck 131, thereby preventing the first connecting element 120 and the second connecting element 130 from shifting in the horizontal direction P to cause an open circuit or a short circuit. The outer thickness T1 of each elastic piece 132 is greater than the inner thickness T2 of each elastic hook 121, so that the elastic piece 132 presses the elastic hook 121 when entering or leaving the elastic hook 121.

Referring to fig. 1A to 1C, each battery module 110(110a, 110b) includes two frames 111 and a plurality of battery cells 112. The plurality of battery cells 112 are disposed between the two frames 111. The first connectors 120 are disposed through one of the frames 111 of the battery module 110a to electrically couple the battery cells 112 of the battery module 110a, respectively. Similarly, the second connecting members 130 are disposed through one of the frames 111 of the battery module 110b to be electrically coupled to the battery cells 112 of the battery module 110b, respectively.

The plurality of battery cells 112 are disposed between the two frames 111 of the

battery modules

110a and 110b and are in an array form. Each cell 112 has two electrodes E1 and E2 (wherein the electrode E1 is a positive electrode and the electrode E2 is a negative electrode). In the present embodiment, the battery cells 112 are rechargeable lithium ion batteries or lithium ion polymer batteries. In other embodiments, other types of rechargeable batteries can be used as the battery cells, such as: lead storage batteries, nickel-hydrogen batteries, nickel-cadmium batteries, or the like.

Referring to fig. 1C and 2A, in the present embodiment, the electrode E1 of each battery cell 112 of the battery module 110a faces the upper cover 160 and the electrode E2 of each battery cell 112 of the battery module 110b faces the upper cover 160. When the first connectors 120 (contacting the electrodes E1) penetrating the battery modules 110a are in contact with and electrically coupled to the second connectors 130 (contacting the electrodes E2) penetrating the battery modules 110b, the two

battery modules

110a and 110b are connected in series. In other embodiments, the directions of the battery cells of the two battery modules may be adjusted to be the same, so that the two battery modules are in parallel connection through the contact between the first connecting member and the second connecting member.

Referring to fig. 1B and 1C, the battery system 100 further includes two fixing trays 170 respectively disposed at both sides of the two battery modules 110a and 110B. In detail, the two fixing trays 170 are respectively engaged with the plurality of columns R formed on the plurality of frames 111 to fix the two

battery modules

110a and 110b and prevent the vertical displacement V.

In the present embodiment, each frame 111 has a plurality of perforations O. The through holes O are respectively aligned with the battery cells 112, and the overall heat dissipation efficiency of the battery system 100 can be improved by the plurality of through holes O.

Refer to fig. 1D, 2B, and 2C. When a plurality of battery modules are assembled (two battery modules are taken as an example in the present invention), the plurality of second connecting members 130 of the upper battery module 110b are respectively aligned with the plurality of first connecting members 120 of the lower battery module 110 a. In detail, the neck portion 131 of each second connecting member 130 is disposed between the two elastic hook portions 121 of each first connecting member 120, and the elastic sheet portion 132 is located below the two elastic hook portions 121. Then, an external force along the vertical direction V is applied to displace the battery module 110b upward, and in the process, the elastic sheet portions 132 press the two elastic hook portions 121 to generate outward expansion deformation until the elastic sheet portions 132 enter the elastic hook portions 121 and are clamped by the two elastic hook portions 121 and abut against each other. Meanwhile, the neck 131 enters the groove G and is limited by the two elastic hooks 121. At this time, the upper battery module 110b is electrically coupled to the first connectors 120 of the lower battery module 110a through the second connectors 130, so as to connect the two battery modules 100 in series.

Further, if the two

battery modules

110a and 110b are to be disassembled, the above steps can be reversed to separate the second connecting members 130 from the first connecting members 120. Since the first connecting member 120 and the second connecting member 130 are only clamped and abutted, when the two

battery modules

110a and 110b are to be disassembled, the two battery modules stacked with each other are separated by external force, and the disassembly is completed, so that the battery system of the present invention has the characteristics of easy disassembly and replacement.

In summary, the battery system of the present invention includes a plurality of modularized first connecting members and a plurality of modularized second connecting members, which are respectively disposed on at least two battery modules. The at least two battery modules are stacked up and down, and the plurality of first connecting pieces are respectively clamped with the plurality of first connecting pieces and are electrically coupled with the at least two battery modules. The invention adopts the assembly mode of stacking and mutually clamping, thereby having the characteristic of easy disassembly and assembly. Therefore, when one of the battery modules is damaged, only the damaged battery module needs to be taken down and replaced by a new battery module, and the whole battery module does not need to be replaced, so that the replacement cost can be greatly saved.

In addition, the invention is provided with two fixed disks which are respectively fixed on two sides of at least two battery modules, thereby avoiding the unstable or separated situation of at least two battery modules caused by external force.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A battery system, comprising:

at least two battery modules stacked one on another;

a plurality of first connecting members disposed at one of the at least two battery modules; and

a plurality of second connecting members disposed at another one of the at least two battery modules,

each first connecting piece and each second connecting piece respectively extend out of the at least two battery modules, and each second connecting piece is detachably clamped with each first connecting piece so as to be electrically coupled with the at least two battery modules.

2. The battery system of claim 1, wherein each of the first connecting members has two elastic hook portions forming a groove therebetween, each of the second connecting members has a neck portion and a spring portion, the spring portion is integrally connected to the neck portion at a center thereof, and each of the grooves receives each of the neck portions, and each of the spring portions is engaged with the corresponding elastic hook portions.

3. The battery system of claim 2, wherein the neck portion is disposed between the elastic hook portions and extends out of the groove, and two ends of each elastic piece portion protrude out of the corresponding elastic hook portions.

4. The battery system of claim 2, wherein a width dimension of each of the grooves is greater than a width dimension of each of the necks, such that each of the grooves receives a corresponding one of the necks.

5. The battery system of claim 2, wherein a distance between each spring portion and the at least two battery modules is less than a distance between each elastic hook portion and the at least two battery modules.

6. The battery system of claim 2, wherein the thickness of the outer thickness dimension of each spring portion is greater than the thickness of the inner thickness dimension of each elastic hook portion.

7. The battery system of claim 1, wherein each of the first connecting members and each of the second connecting members extend along a length direction of the at least two battery modules, the first connecting members and the second connecting members are spaced apart from each other, and the first connecting members are aligned with the second connecting members, respectively.

8. The battery system according to claim 1, further comprising two fixing trays respectively disposed at both sides of the at least two battery modules to fix the at least two battery modules.

9. The battery system of claim 1, further comprising a control board electrically coupled to the at least two battery modules.

10. The battery system of claim 1, wherein each of the at least two battery modules comprises two frames and a plurality of battery cells disposed between the frames.

11. The battery system of claim 1, further comprising an upper cover and a lower cover connected to each other to form an accommodating space, wherein the at least two battery modules, the first connecting members and the second connecting members are disposed in the accommodating space.