Battery structure and battery module

Abstract

The battery structure comprises a square shell, an energy storage module, a positive pole piece and a negative pole piece, the square shell is provided with a first butt joint surface and a second butt joint surface, and the first butt joint surface and the second butt joint surface are two different surfaces of the square shell and are adjacent or opposite to each other; the energy storage module is located in the square shell and can store energy, the positive pole piece and the negative pole piece are connected with the energy storage module to input or output electric energy, and the positive pole piece and the negative pole piece are arranged on the first butt joint face and the second butt joint face respectively. When the battery module is assembled, the battery module can be formed by splicing only by butting the battery structure with the first butting surface of another battery structure through the second butting surface, and the battery module does not need to be independently provided with switching parts such as a backflow bar, so that the assembly difficulty of the battery module is reduced, and the reliability of the battery module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply devices, and particularly relates to a battery structure and a battery module. Background Art

[0002] A battery module is a modular component including multiple battery cells, mainly used to connect multiple battery cells together to meet the voltage and energy storage capacity requirements of different applications.

[0003] For example, the battery cell module and battery disclosed in the document with the publication number CN211350786U. The battery module includes a housing, an upper cover, battery cells, a bus bar, and a battery acquisition system. After the housing is connected to the upper cover, an accommodation space is formed, and the battery cells, the bus bar, and the battery acquisition system are arranged inside the accommodation space; the battery acquisition system is connected to the lower surface of the bus bar through an electrical connection piece, and this structure can reduce the size of the battery module in the height direction and improve the utilization rate of the internal space of the battery module.

[0004] Existing battery modules need to be provided with intermediate transfer components such as bus bars and cables to connect each battery cell, resulting in a relatively complex structure of the battery cell module, difficult assembly, low reliability, and certain energy loss during the energy transmission process. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, and propose a battery structure and a battery module to solve the technical problems that in the prior art, the battery cells of the battery module need to be connected by transfer components such as bus bars, resulting in a relatively complex structure of the battery module and difficult assembly.

[0006] To achieve the above technical purpose, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a battery structure, including: A square housing having a first docking surface and a second docking surface, the first docking surface and the second docking surface being adjacent or opposite; An energy storage module arranged inside the square housing for storing electric energy; A positive electrode member arranged on the first docking surface and connected to the energy storage module; and A negative electrode member arranged on the second docking surface and connected to the energy storage module; Wherein, the positive electrode members and the negative electrode members of two adjacent battery structures can be connected by docking the first docking surface and the second docking surface.

[0007] In some embodiments, the square housing is a cube structure.

[0008] In some embodiments, the first docking surface and the second docking surface form a mounting opening, and both the positive electrode member and the negative electrode member are disposed in the mounting opening.

[0009] In some embodiments, both the positive electrode member and the negative electrode member include a support frame and a plate electrode. The support frame is disposed in the mounting opening, and the plate electrode is disposed inside the support frame and connected to the energy storage module.

[0010] In some embodiments, the positive electrode member and the negative electrode member further include a rubber sealing ring, which is disposed between the plate electrode and the support frame to seal the plate electrode and the support frame.

[0011] In some embodiments, the energy storage module includes a stacked film core, a positive electrode tab, and a negative electrode tab. The stacked film core is disposed inside a square housing. The positive electrode tab is disposed on one side of the stacked film core and connected to the positive electrode member and the positive electrode material of the stacked film core. The negative electrode tab is disposed on a side adjacent to or opposite to the positive electrode tab of the stacked film core and connected to the negative electrode member and the negative electrode material of the stacked film core.

[0012] In some embodiments, a plurality of positive electrode tabs and a plurality of negative electrode tabs are provided. Each positive electrode tab and each negative electrode tab are respectively connected to each positive electrode material and each negative electrode material of the stacked film core and are evenly distributed along the surface of the stacked film core.

[0013] In some embodiments, the positive electrode tab is spaced from the stacked film core and the positive electrode member, and the negative electrode tab is spaced from the stacked film core and the negative electrode member.

[0014] In some embodiments, the inner wall of the square housing has a flexible heat conducting member, and the flexible heat conducting member fits on each surface of the stacked film core other than the surfaces where the positive electrode tab and the negative electrode tab are located.

[0015] In a second aspect, the present invention provides a battery module, including a plurality of battery structures. Each of the battery structures is sequentially connected. The first docking surface of each battery structure is docked with the second docking surface of an adjacent battery structure, and the positive electrode member of each battery structure is connected to the negative electrode member of an adjacent battery structure.

[0016] Compared with the prior art, the battery structure provided by the present invention includes a square housing, an energy storage module, a positive electrode member, and a negative electrode member. The square housing has a first docking surface and a second docking surface, which are two different surfaces of the square housing and are adjacent or opposite to each other. The energy storage module is located inside the square housing for energy storage. The positive electrode member and the negative electrode member are connected to the energy storage module to input or output electric energy. The positive electrode member and the negative electrode member are respectively arranged on the first docking surface and the second docking surface. Through the above arrangement, when forming a battery module by splicing the battery structures, only the battery structure needs to be docked with the first docking surface of another battery structure through the second docking surface, so that the positive electrode member and the negative electrode member of the two battery structures can be connected. By connecting several battery structures in the above manner, a battery module can be spliced. The battery module can input and output electric energy through the positive electrode member and the negative electrode member of the battery structure at the edge, without separately arranging transfer components such as busbars, thereby effectively simplifying the structure of the battery module, reducing the assembly difficulty of the battery module, improving the reliability of the battery module, and at the same time reducing the loss during the process of electric energy input and output. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a battery structure provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of the battery structure from another angle provided by an embodiment of the present invention; Figure 3 is an exploded view of the battery structure provided by an embodiment of the present invention; Figure 4 is a schematic structural diagram of a battery structure provided by another embodiment of the present invention; Figure 5 is an exploded view of the battery structure provided by another embodiment of the present invention; Figure 6 is a schematic structural diagram of a battery module provided by an embodiment of the present invention; Figure 7 is a schematic structural diagram of a battery module provided by another embodiment of the present invention; Figure 8 is a schematic structural diagram of a battery module provided by the third embodiment of the present invention; Figure 9 is a schematic structural diagram of a battery module provided by the fourth embodiment of the present invention.

[0018] Reference numerals in the drawings: 10 - square housing, 11 - first docking surface, 12 - second docking surface 20 - energy storage module, 21 - laminated core, 22 - positive electrode tab 23 - negative electrode tab, 30 - positive electrode member, 31 - support frame 32 - electrode plate, 40 - negative electrode member, 50 - battery structure 111 - Installation port. Specific implementation mode

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In order to solve the technical problem that in the prior art, the cell structures of the battery module need to be connected by means of busbars and other intermediate connection components, resulting in a relatively complex structure of the battery module and a large assembly difficulty, the present invention provides a battery structure, in which a battery module can be formed only by splicing the battery structures, omitting intermediate connection components such as busbars and cables, thereby simplifying the structure of the battery module, reducing the assembly difficulty of the battery module, improving the reliability of the battery module, and at the same time reducing the loss in the process of electric energy input and output.

[0021] It should be noted that the battery structure described in the present invention is applicable to but not limited to lithium batteries, etc., and the principle of applying the battery structure to other types of batteries is essentially the same as that of applying it to lithium batteries, and will not be elaborated here one by one.

[0022] The battery structure provided by the embodiment of the present invention, as Figures 1-5 shown, includes a square housing 10, an energy storage module 20, a positive electrode member 30 and a negative electrode member 40. The square housing 10 has a first docking surface 11 and a second docking surface 12, and the first docking surface 11 and the second docking surface 12 are adjacent or opposite; the energy storage module 20 is arranged inside the square housing 10 for storing electric energy; the positive electrode member 30 is arranged on the first docking surface 11 and connected to the energy storage module 20; the negative electrode member 40 is arranged on the second docking surface 12 and connected to the energy storage module 20; the positive electrode member 30 and the negative electrode member 40 of adjacent battery structures can be connected by docking the first docking surface 11 and the second docking surface 12.

[0023] Specifically, the battery structure includes a square housing 10, an energy storage module 20, a positive electrode member 30, and a negative electrode member 40. The square housing 10 has a first docking surface 11 and a second docking surface 12. The first docking surface 11 and the second docking surface 12 are two different surfaces of the square housing 10, which are adjacent or opposite to each other. The energy storage module 20 is located inside the square housing 10 for energy storage. The positive electrode member 30 and the negative electrode member 40 are connected to the energy storage module 20 to input or output electrical energy. The positive electrode member 30 and the negative electrode member 40 are respectively disposed on the first docking surface 11 and the second docking surface 12, forming the adjacent or opposite relationship between the positive electrode member 30 and the negative electrode member 40. Through the above arrangement, when forming a battery module by splicing the battery structures, only the second docking surface 12 of the battery structure needs to be docked with the first docking surface 11 of another battery structure, so that the positive electrode member 30 and the negative electrode member 40 of the two battery structures can be connected. By connecting several battery structures in the above manner, a battery module can be spliced. The battery module can input and output electrical energy through the positive electrode member 30 and the negative electrode member 40 of the battery structures at the edge, without separately setting transfer components such as busbars, thereby effectively simplifying the structure of the battery module, reducing the assembly difficulty of the battery module, improving the reliability of the battery module, and at the same time reducing the loss during the process of electrical energy input and output.

[0024] It can be understood that the square housing 10 can be a cuboid structure. When the square housing 10 is a cuboid structure, the relatively arranged first docking surface 11 and second docking surface 12 can be formed on two end faces of the square housing 10 or two opposite side faces of the square housing 10; the adjacent first docking surface 11 and second docking surface 12 can be formed on two adjacent side faces of the square housing 10, or disposed on one end face and one side face, as long as multiple square housings 10 can be spliced to form a battery module.

[0025] In one embodiment, as Figures 1-5 shown, the square housing 10 is a cube structure. Specifically, by setting the square housing 10 as a cube structure, the first docking surface 11 and the second docking surface 12 only need to be disposed on two different side faces of the square housing 10, and the battery structure forms a cube structure, so that the battery structure can be spliced according to actual needs to form any structure that can be formed by splicing multiple cube structures, such as a "one" shape, an "L" shape, a zigzag shape, a block shape, a multi-dimensional shape, etc., so as to meet the battery modules with any shape requirements.

[0026] In this embodiment, it should be noted that the first docking surface 11 and the second docking surface 12 do not refer to the actual surfaces of the square housing 10, but mainly refer to two adjacent or opposite orientations on the square housing 10.

[0027] In this embodiment, the square housing 10 is made of aluminum alloy, and its functions are to support and protect the energy storage module 20 and conduct heat.

[0028] Understandably, the square housing 10 can also be made of other materials such as steel shells and plastics.

[0029] In one embodiment, as Figure 3 and 5 shown, the first docking surface 11 and the second docking surface 12 form an installation opening 111, and both the positive electrode member 30 and the negative electrode member 40 are installed in the installation opening 111. Specifically, by forming the installation opening 111 structure with the first docking surface 11 and the second docking surface 12, the positive electrode member 30 and the negative electrode member 40 can form two different sides of the square housing 10. Through the docking of these two sides, the stable connection of the positive electrode member 30 and the negative electrode member 40 of the two battery structures can be ensured, thereby improving the reliability of the battery module formed by splicing the battery structures and ensuring the stability of the current.

[0030] In this embodiment, both the first docking surface 11 and the second docking surface 12 are opening structures formed on different sides of the square housing 10.

[0031] In one embodiment, as Figures 1-5 shown, both the positive electrode member 30 and the negative electrode member 40 include a support frame 31 and a plate electrode 32. The support frame 31 is installed in the installation opening 111, and the plate electrode 32 is installed inside the support frame 31 and connected to the energy storage module 20. Specifically, the support frame 31 can be connected to the square housing 10 to provide support for the plate electrode 32, ensuring the stability of the electrode member structure and thus the stability of the battery module structure.

[0032] In one embodiment, the positive electrode member 30 and the negative electrode member 40 further include a rubber sealing ring (not marked in the figure). The rubber sealing ring is installed between the plate electrode 32 and the support frame 31 to seal the plate electrode 32 and the support frame 31. Specifically, the rubber sealing ring can achieve the sealing between the plate electrode 32 and the support frame 31, so that the square housing 10 can cooperate with the positive electrode member 30 and the negative electrode member 40 to form a closed space, effectively protecting the internal energy storage module 20.

[0033] Understandably, the energy storage module 20 can be any energy storage structure capable of charging and discharging.

[0034] In one embodiment, as Figure 3 and 5As shown in the figure, the energy storage module 20 includes a laminated core 21, a positive tab 22, and a negative tab 23. The laminated core 21 is installed inside the square housing 10. The positive tab 22 is installed on one side of the laminated core 21 and connects the positive electrode member 30 and the positive electrode material of the laminated core 21. The negative tab 23 is installed on the side of the laminated core 21 adjacent to or opposite to the positive tab 22 and connects the negative electrode member 40 and the negative electrode material of the laminated core 21. Specifically, the laminated core 21 is composed of a positive electrode material, a negative electrode material, and a separator disposed between the positive electrode material and the negative electrode material. It is the core component of the battery structure and has the function of storing and releasing electrons. During charging, due to the existence of the potential difference, the current enters the negative tab 23 through the negative electrode member 40 and then is transmitted to the laminated core 21 to complete the charging. During discharging, due to the existence of the potential difference, the current is transmitted through the laminated core 21 to the positive tab 22 and then completes the discharging through the positive electrode member 30, finally realizing the charging and discharging functions of the energy storage module 20. Through the setting of the laminated core 21, in addition to realizing the charging and discharging functions of the energy storage module 20, it can also make the positive tab 22 and the negative tab 23 adjacent and opposite to each other.

[0035] In this embodiment, a plurality of positive electrode materials and negative electrode materials are provided for the laminated core 21. Each positive electrode material and each negative electrode material can input and output electric energy by centrally providing one positive tab 22 and one negative tab 23.

[0036] In one of the embodiments, as Figure 3 and 5 shown in the figure, a plurality of positive tabs 22 and negative tabs 23 are provided. Each positive tab 22 and each negative tab 23 are respectively connected to each positive electrode material and each negative electrode material of the laminated core 21 and are uniformly distributed along the surface of the laminated core 21. Specifically, each positive electrode material and each negative electrode material of the laminated core 21 can respectively output electric energy through each positive tab 22 and each negative tab 23. And because each positive tab 22 and each negative tab 23 are uniformly distributed along the surface of the laminated core 21, therefore, the electric energy can be uniformly output to the positive electrode member 30, and the electric energy can be uniformly input to the laminated core 21 through the negative electrode member 40, thereby ensuring the stability of the input and output of electric energy.

[0037] In this embodiment, each positive tab 22 is connected to the plate 32 of the positive electrode member 30 to uniformly output electric energy to the plate 32, thereby ensuring the stability of the output electric energy. Each negative tab 23 is connected to the plate 32 of the negative electrode member 40 to uniformly input the electric energy to each negative electrode material through the plate 32 of the negative electrode member 40, thereby ensuring the stability of the input of electric energy.

[0038] In one embodiment, the positive electrode tab 22 is spaced between the laminate core 21 and the positive electrode member 30, and the negative electrode tab 23 is spaced between the laminate core 21 and the negative electrode member 40. Specifically, the positive electrode tab 22 and the negative electrode member 40 can cause the laminate core 21 to be spaced from the positive electrode member 30 and the negative electrode member 40, thereby forming an expansion space for the laminate core 21 to deform, thereby preventing the square housing 10 from being deformed due to the expansion of the laminate core 21, thereby ensuring the stability of the battery module.

[0039] In one embodiment, the inner wall of the square housing 10 has a flexible heat-conducting member (not shown in the figure), and the flexible heat-conducting member fits on all surfaces other than the surface where the positive pole ear 22 and the negative pole ear 23 of the laminated core 21 are located. Specifically, when the laminated core 21 expands, the flexible heat-conducting member will be deformed under the pressure of the laminated core 21, thereby avoiding deformation of the square housing 10 due to the expansion of the laminated core 21, so that the battery structures of the battery module can always remain in contact, ensuring the stability of the structure.

[0040] The present invention also provides a battery module. Figures 6-9 As shown, it includes a plurality of battery structures 50, each battery structure 50 is connected in sequence, the first docking surface 11 of each battery structure 50 docks with the second docking surface 12 of the adjacent battery structure 50, and the positive electrode 30 of each battery structure 50 is connected with the negative electrode 40 of the adjacent battery structure 50.

[0041] Specifically, the battery module is provided with the above-mentioned battery structure 50, so that the input and output of electric energy can be realized without the use of a bus, so that the battery module can input and output electric energy through the positive electrode component 30 and the negative electrode component 40 of the battery structure 50 at the edge, and there is no need to separately set up adapter components such as a return bus, thereby effectively simplifying the structure of the battery module, reducing the difficulty of assembling the battery module, and improving the reliability of the battery module. At the same time, the loss in the process of electric energy input and output is reduced. Each battery structure 50 can be tightly and seamlessly grouped to save space. Since there is no gap in the middle, the structural strength of the entire battery system is stronger, and it can be supported by adjacent battery structures 50 without the need to set up additional supporting structures.

[0042] In one embodiment, when the first butt joint surface 11 and the second butt joint surface 12 of each battery structure 50 of the battery module are adjacent to each other, the following can be formed: Figure 6 The continuously bent folded structure shown. (The arrow direction in the figure is the splicing direction of each battery structure 50) In one embodiment, when the first butt joint surface 11 and the second butt joint surface 12 of each battery structure 50 of the battery module are both opposite surfaces, the battery module can be formed as follows by sequentially splicing the battery structures 50. Figure 7 The “I”-shaped structure shown (the direction of the arrow in the figure is the splicing direction of each battery structure 50).

[0043] In one of the embodiments, when the first docking surface 11 and the second docking surface 12 of a part of the battery structure 50 of the battery module are adjacent, and a part of the first docking surface 11 and the second docking surface 12 are opposite, the battery structures 50 with the first docking surface 11 and the second docking surface 12 being adjacent or opposite can be selected according to actual needs, so as to form a battery module structure in any structural form, such as Figure 8 the plate shape shown (the arrow direction in the figure is the splicing direction of each battery structure 50), and such as Figure 9 the multi-dimensional structure shown. (The arrow direction in the figure is the splicing direction of each battery structure 50) The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery structure, characterized in that, Comprising: A square housing having a first docking surface and a second docking surface, where the first docking surface and the second docking surface are adjacent or opposite to each other; An energy storage module disposed inside the square housing for storing electrical energy; A positive electrode member disposed on the first docking surface and connected to the energy storage module; And A negative electrode member disposed on the second docking surface and connected to the energy storage module; Wherein, the positive electrode member and the negative electrode member of adjacent battery structures can be connected by the docking of the first docking surface and the second docking surface.

2. The battery structure according to claim 1, wherein The square housing is of a cube structure.

3. The battery structure according to claim 1, characterized in that, The first docking surface and the second docking surface form a mounting opening, and both the positive electrode member and the negative electrode member are mounted in the mounting opening.

4. The battery structure according to claim 3, characterized in that, Both the positive electrode member and the negative electrode member include a support frame and a plate electrode. The support frame is mounted in the mounting opening, and the plate electrode is mounted inside the support frame and connected to the energy storage module.

5. The battery structure according to claim 4, characterized in that, The positive electrode member and the negative electrode member further include a rubber sealing ring, and the rubber sealing ring is mounted between the plate electrode and the support frame to seal the plate electrode and the support frame.

6. The battery structure according to any one of claims 1-5, characterized in that, The energy storage module includes a stacked film core, a positive electrode tab, and a negative electrode tab. The stacked film core is mounted inside the square housing. The positive electrode tab is mounted on one side surface of the stacked film core and connected to the positive electrode member and the positive electrode material of the stacked film core. The negative electrode tab is mounted on the side surface adjacent to or opposite to the positive electrode tab of the stacked film core and connected to the negative electrode member and the negative electrode material of the stacked film core.

7. The battery structure according to claim 6, characterized in that, A plurality of the positive electrode tabs and the negative electrode tabs are provided. Each of the positive electrode tabs and each of the negative electrode tabs are respectively connected to each of the positive electrode materials and each of the negative electrode materials of the stacked film core and are evenly distributed along the surface of the stacked film core.

8. The battery structure according to claim 6, wherein, The positive electrode tab is spaced between the stacked film core and the positive electrode member, and the negative electrode tab is spaced between the stacked film core and the negative electrode member.

9. The battery structure according to claim 6, wherein, The inner wall of the square housing has a flexible heat conducting member, and the flexible heat conducting member fits on each surface of the stacked film core other than the surfaces where the positive electrode tab and the negative electrode tab are located.

10. A battery module, characterized in that, Including a plurality of battery structures as described in any one of claims 1-9. Each of the battery structures is connected in sequence. The first docking surface of each battery structure docks with the second docking surface of the adjacent battery structure, and the positive electrode member of each battery structure is connected to the negative electrode member of the adjacent battery structure.

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