TW202006993A - Battery system - Google Patents

Abstract

A battery system including at least two battery modules, a plurality of first connecting element, and a plurality of second connecting element. The at least two battery modules are piled on each other. The first connecting elements are disposed in one of the at least two battery modules. The second connecting elements are disposed in the other one of the at least two battery modules. Each one of the first connecting elements and each one of the second connecting elements are respectively extended outside the at least two battery modules. Each one of the second connecting elements is removably fastened with each one of the first connecting elements to electrically couple to the at least two battery modules.

Description

Battery system

The invention relates to a battery system, and in particular to a battery system that is easy to replace and assemble.

Existing battery systems used in electric vehicles or electric vehicles are formed by connecting multiple battery modules in series or parallel. Because lithium-ion batteries have the advantages of high energy density, long cycle life, and large charging power, most current battery modules use lithium-ion batteries.

In the existing battery modules, each battery cell in the battery module is mainly connected in series and in parallel through metallic nickel to achieve the required voltage and current. When a larger power output is required, the number of battery cells needs to be increased or multiple ones are connected Battery module. Therefore, most of the existing battery systems are customized specifications, and cannot be applied to all electric vehicles and electric vehicles. Because the existing battery modules are welded and have the disadvantage of not being easy to disassemble, it also limits the arrangement of the battery modules. When any contact or battery in each battery module is damaged, the entire battery system needs to be replaced . To this end, the development of a battery system that is easy to assemble and easily replace damaged areas is an important future development goal.

The invention provides a battery system with the characteristics of rapid assembly and easy disassembly and replacement.

The battery system of the present invention includes at least two battery modules, a plurality of first connectors, and a plurality of second connectors. At least two battery modules are stacked on each other. The plurality of first connectors are configured on one of the at least two battery modules. The plurality of second connectors are disposed on the other 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 connector is detachably engaged with each first connector to electrically couple at least two battery modules.

Based on the above, the battery system of the present invention includes a plurality of modular first connectors and second connectors, which are respectively disposed in at least two battery modules. The at least two battery modules of the present invention are stacked up and down, and the plurality of first connectors are respectively engaged with the plurality of first connectors, and thereby electrically coupled to the at least two battery modules. Since the present invention adopts a stacking and interlocking assembly method, which has the characteristics of easy disassembly and assembly, when one of the battery modules is damaged, it is only necessary to remove the damaged battery module and replace it with a new one Group, no need to replace all.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

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

Please refer to FIGS. 1A to 1C. The battery system 100 of this embodiment is, for example, a product formed by combining a plurality of battery modules (two battery modules are taken as an example in this embodiment) and a battery monitoring and management device as a supply motor The power storage device of a vehicle 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 this 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 this embodiment, at least two battery modules 110 include two, and the two battery modules (110a, 110b) are stacked on top of each other, that is, the battery modules 110b are stacked above the battery modules 110a.

Please refer to Figures 1D and 1E together. A plurality of first connectors 120 are disposed on the battery module 110a. A plurality of second connectors 130 are disposed on the battery module 110b. Each first connecting member 120 and each second connecting member 130 respectively extend out of the two battery modules 110a and 110b. Each second connector 130 is detachably engaged with each first connector 120 to electrically couple the two battery modules 110a, 110b. The first connection members 120 and the second connection members 130 extend along the length direction LD of the two battery modules 110a and 110b, and the plurality of first connection members 120 and the plurality of second connection members 120 are spaced apart from each other . The plurality of first connectors 120 respectively align with the corresponding plurality of second connectors 130. Further, the two battery modules 110a and 110b are connected in series to increase the output voltage of the battery system 100 through the first connectors 120 and the second connectors 130, or to increase the output current of the battery system 100 in parallel with each other. The invention is not limited.

In addition, each first connector 120 and each second connector 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 110b. As the control and monitoring core of the battery system, the operation process of the battery system 100 can be controlled. For example, when the control board 140 receives a speed-up command or a speed-down command for an electric vehicle or an electric vehicle, it can correspondingly increase or decrease the output current value of the two battery modules 110a, 110b to increase or decrease the electric motor Speed. In addition, the control board 140 can also monitor the temperature, current value, voltage value or other relevant 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, 110b, the plurality of first connecting members 120, the plurality of second connecting members 130, and the control board 140 are all disposed in the accommodating space AS. Further, the upper cover 150 and the lower cover 160 are made of heat-resistant material or shock-proof material, for example, to prevent the battery module from being damaged by external force or high heat.

FIG. 2A is a schematic cross-sectional view of some components of the battery system of FIG. 1A along the B-B section. 2B and 2C are schematic diagrams of disassembly and assembly of the first connector and the second connector of the battery system of FIG. 2A.

Refer to Figures 2A, 2B and 1E. Each first connector 120 has two elastic hooks 121. A groove G is formed between the two elastic hooks 121. Each second connector 130 has a neck 131 and an elastic piece 132. The central portion C of the shrapnel portion 132 is integrally connected to the neck 131.

The groove G of each first connecting member 120 accommodates the neck 131 of each second connecting member 130 and each elastic piece 132 is engaged in the corresponding two elastic hooks 121. The two elastic hook portions 121 of each first connecting member 120 are elastically pressed against the elastic piece portions 132 of each second connecting member 130, so that the two are electrically coupled and used to transmit the current of the battery module.

In detail, the width W1 of each groove G is larger than the width W2 of each neck 131 so that each groove G can accommodate the corresponding neck 131. The distance D1 of each elastic piece portion 132 relative to each battery module 110 is smaller than the distance D2 of each elastic hook portion 121 relative to each battery module 110 so that each elastic piece portion 132 can be engaged with the two elastic hook portions. Wherein, each neck 131 is disposed between the corresponding two elastic hooks 121 and penetrates the groove G, and both ends of each elastic piece 132 protrude from the corresponding two elastic hooks 121, so the two elastic hooks 121 are used to restrict The corresponding neck 131 is blocked to prevent the first connecting member 120 and the second connecting member 130 from shifting in the horizontal direction P to cause open circuit, short circuit, and the like. 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 will squeeze the elastic hook 121 when entering or leaving the elastic hook 121.

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 arranged between the two frames 111. The plurality of first connecting members 120 are passed through one of the frames 111 of the battery module 110a to electrically couple the plurality of battery cells 112 of the battery module 110a, respectively. Similarly, the plurality of second connecting members 130 are disposed on one of the frames 111 of the battery module 110b to electrically couple the plurality of battery cells 112 of the battery module 110b, respectively.

The plurality of battery cells 112 are disposed between the two frames 111 of each battery module 110a, 110b and are in the form of an array. Each battery cell 112 has two electrodes E1 and E2 (where the electrode E1 is a positive electrode and the electrode E2 is a negative electrode). In this embodiment, the battery cell 112 is a rechargeable lithium ion battery or lithium ion polymer battery. In other embodiments, the battery cell may also use other types of rechargeable batteries such as lead storage batteries, nickel-metal hydride batteries, or nickel-cadmium batteries.

Referring to FIGS. 1C and 2A, in this embodiment, the electrode E1 of each battery cell 112 of the battery module 110 a faces the upper cover 160 and the electrode E2 of each battery cell 112 of the battery module 110 b faces the upper cover 160. When the plurality of first connectors 120 (contacting the plurality of electrodes E1) disposed on the battery module 110a are in contact with the plurality of second connectors 130 (contacting the plurality of electrodes E2) disposed on each battery module 110b and When electrically coupled, the two battery modules 110a, 110b appear in series. In other embodiments, the directions of the battery cells of the two battery modules can also be adjusted to be consistent, so that the two battery modules are in parallel connection through the first connector and the second connector.

Referring to FIGS. 1B and 1C, the battery system 100 further includes two fixing plates 170, which are respectively disposed on both sides of the two battery modules 110a and 110b. In detail, the two fixing plates 170 respectively fix the plurality of cylinders R formed on the plurality of frames 111 to fix the two battery modules 110a and 110b and prevent displacement in the vertical direction V.

In this embodiment, each frame 111 has a plurality of through holes O. Each through hole O is located at each battery cell 112, and through a plurality of through holes O, the overall heat dissipation efficiency of the battery system 100 can be improved.

Refer to Figures ID, 2B, and 2C. When assembling a plurality of battery modules (the present invention takes two battery modules as an example), the plurality of second connectors 130 of the upper battery module 110b are respectively aligned with the plurality of first connectors of the lower battery module 110a. Connector 120. In detail, the neck 131 of each second connector 130 is placed between the two elastic hooks 121 of each first connector 120, and the elastic piece 132 is located below the two elastic hooks 121. Next, an external force in the vertical direction V is applied to displace the battery module 110b upwards. In the process, each elastic piece 132 presses the two elastic hooks 121 to generate outward expansion deformation until each elastic piece 132 enters the elastic hook 121 and receives The two elastic hooks 121 are clamped and abut against each other. At the same time, 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 plurality of first connectors 120 of the lower battery module 110a through the plurality of second connectors 130, so as to achieve the series connection of the two battery modules 100.

Further, if the two battery modules 110a, 110b are to be disassembled, the above steps can be reversed to disengage each second connector 130 from each first connector 120. Since the first connector 120 and the second connector 130 are only clamped against each other, when the two battery modules 110a and 110b are to be disassembled, only the two battery modules stacked on top of each other need to be separated by external force to complete the disassembly, so 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 modular first connectors and second connectors, which are respectively disposed in at least two battery modules. The at least two battery modules of the present invention are stacked up and down, and the plurality of first connectors are respectively engaged with the plurality of first connectors, and thereby electrically coupled to the at least two battery modules. Since the present invention adopts a stacking and interlocking assembly method, it has the characteristics of easy disassembly and assembly. Therefore, when one of the battery modules is damaged, it is only necessary to remove the damaged battery module and replace the new battery module without replacing all of them, which can greatly save the cost of replacement.

In addition, the present invention has two fixing discs, which are respectively fixed on both sides of at least two battery modules, to avoid situations where at least two battery modules are unstable or separated due to external force.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100‧‧‧ battery system 110, 110a, 110b ‧‧‧ battery module 111 ‧ ‧ ‧ frame 112 ‧ ‧ ‧ battery unit 120 ‧ ‧ ‧ first connector 121 ‧ ‧ ‧ elastic hook 130 ‧ ‧ ‧ second Connecting piece 131‧‧‧Neck 132‧‧‧Shrapnel part 140‧‧‧Control board 150‧‧‧Upper cover 160‧‧‧Lower cover 170‧‧‧Fixed plate C‧‧‧Central part F‧‧‧External force G‧ ‧‧Trench O‧‧‧Pierced P‧‧‧Horizontal R‧‧‧Cylinder V‧‧‧Vertical D1, D2‧‧‧Distance E1, E2‧‧‧Electrode T1‧‧‧Outside thickness T2‧‧‧ Inside thickness W1, W2‧‧‧Width AS‧‧‧Accommodation space LD‧‧‧Long direction

FIG. 1A is a schematic perspective view of a battery system according to an embodiment of the invention. FIG. 1B is an exploded schematic diagram of the battery module of FIG. 1A. FIG. 1C is a schematic cross-sectional view of the battery system of FIG. 1A along the A-A section. FIG. 1D is a schematic plan view of a combination of two battery modules of the battery system of FIG. 1A. 1E is an enlarged schematic view of some components of the battery system of FIG. 1D. FIG. 2A is a schematic cross-sectional view of some components of the battery system of FIG. 1A along the B-B section. 2B-2C are schematic diagrams of disassembly and assembly of the first connector and the second connector of the battery system of FIG. 2A.

100‧‧‧ battery system

110, 110a, 110b‧‧‧ battery module

120‧‧‧First connector

130‧‧‧Second connector

140‧‧‧Control board

150‧‧‧Cover

160‧‧‧ Lower cover

170‧‧‧Fixed plate

O‧‧‧perforation

P‧‧‧horizontal

V‧‧‧Vertical

AS‧‧‧accommodating space

Claims (11)

A battery system includes: at least two battery modules arranged in a stack; a plurality of first connectors arranged on one of the at least two battery modules; and a plurality of second connectors arranged on the at least two The other one of the battery modules, wherein each of the first connecting member and each of the second connecting members respectively extend out of the at least two battery modules, and each of the second connecting members is detachably engaged with each of the The first connector is electrically coupled to the at least two battery modules. The battery system as described in item 1 of the patent application, wherein each of the first connecting members has two elastic hooks, a groove is formed between the elastic hooks, and each of the second connecting members has a neck and a The elastic piece portion, the central portion of the elastic piece portion is integrally connected with the neck portion, and each of the grooves accommodates the neck portion, and each elastic piece portion is engaged with the corresponding elastic hook portions. The battery system as described in item 2 of the patent application range, wherein the neck is provided between the elastic hooks and penetrates the groove, and both ends of each elastic piece protrude from the corresponding elastic hooks. The battery system according to item 2 of the patent application scope, wherein the width dimension of each groove is larger than the width dimension of each neck, so that each groove accommodates the corresponding neck. The battery system as described in item 2 of the patent application range, wherein the distance of each elastic piece portion with respect to the at least two battery modules is smaller than the distance of the elastic hook portions with respect to the at least two battery modules. The battery system as described in item 2 of the patent application range, wherein the thickness of the outer thickness of each of the elastic pieces is greater than the thickness of the inner of each of the elastic hooks. The battery system as described in item 1 of the patent application range, wherein each of the first connector and each of the second connectors extend along the length of the at least two battery modules, and the first connectors and the connectors The second connecting pieces are all spaced apart from each other, and the first connecting pieces are respectively located on the second connecting pieces. The battery system as described in item 1 of the scope of the patent application further includes two fixing plates respectively disposed on both sides of the at least two battery modules to fix the at least two battery modules. The battery system as described in item 1 of the patent application scope further includes a control board electrically coupled to the at least two battery modules. The battery system according to item 1 of the patent application scope, wherein each of the at least two battery modules includes two frames and a plurality of battery cells, and the battery cells are disposed between the frames. The battery system as described in item 1 of the patent application scope further includes an upper cover and a lower cover, which are connected to each other to form an accommodating space, and the at least two battery modules, the first connectors and the second connectors are arranged in In this accommodation space.

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