Support structure, battery module and battery system

Abstract

The present invention relates to the field of battery technology, and specifically to a support structure, a battery cell module and a battery system. A support structure includes a support assembly and a first partition assembly, the first partition assembly includes at least three first partitions, at least three first partitions are connected to the outside of the support assembly, and are spaced around the periphery of the support assembly, and every two adjacent first partitions form an installation space with the corresponding positions of the support assembly, and the installation space is suitable for assembling at least one battery cell. The support structure can not only support the battery cells, but also separate the battery cells, and also expose the larger surface of the battery cells to achieve a better heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a support structure, a battery cell module and a battery system. Background Art

[0002] With the continuous development and breakthroughs in battery technology, especially power battery technology, and the increasing application of power batteries in electric vehicles and energy storage, the requirements for battery performance and safety are increasing.

[0003] Existing power batteries usually include three groups: soft-pack batteries, square-shell batteries, and cylindrical batteries. Soft-pack batteries are thinner and shaped like blades, so they are called blade batteries. An existing blade battery pack structure usually consists of multiple battery cell groups stacked together to form a battery stack. Each battery cell group is composed of multiple blade battery cells stacked together. The larger area of ​​the battery cell is used to abut and cooperate with the adjacent battery cells, resulting in poor heat dissipation of the battery cell, a shorter battery life, and easy bulging of the battery cell. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor heat dissipation effect of stacked battery cells in the prior art, thereby providing a support structure, a battery cell module and a battery system.

[0005] In order to solve the above technical problems, the present invention provides a support structure, including a support assembly and a first partition assembly, the first partition assembly including at least three first partitions, at least three first partitions are connected to the outside of the support assembly, and are distributed around the periphery of the support assembly at intervals, and every two adjacent first partitions form an installation space with the corresponding positions of the support assembly, and the installation space is suitable for assembling at least one battery cell.

[0006] In the support structure provided by the present invention, the first separator is in a plate shape, the distance between two adjacent first separators gradually increases in the direction away from the support assembly, and the shape of the battery cell is suitable for matching with the installation space.

[0007] The support structure provided by the present invention, the support assembly includes at least three support plates, at least three support plates are connected in sequence to form a hollow prism-shaped structure, and each side edge of the support assembly is connected to one of the first separators.

[0008] In the support structure provided by the present invention, each support plate is provided with at least one through hole, the hollow inner cavity of the support assembly is a flow cavity, the through hole connects the installation space with the flow cavity, and the explosion-proof valve of the battery cell is suitable for corresponding to the position of the through hole.

[0009] In the support structure provided by the present invention, a heat-resistant tube is protruding from the explosion-proof valve, and the heat-resistant tube is suitable for being arranged relatively to the through hole.

[0010] In the support structure provided by the present invention, a heat insulating portion is pasted or coated on each of the support plates, and an opening is provided on the heat insulating portion at a position corresponding to the through hole.

[0011] The support structure provided by the present invention also includes a second partition component, which is connected in the circulation cavity and divides the circulation cavity into a central channel and a plurality of pressure relief channels. The plurality of pressure relief channels are arranged around the periphery of the central channel, and each of the pressure relief channels is connected to at least one of the installation spaces through at least one through hole.

[0012] The supporting structure provided by the present invention is suitable for arranging a sprinkler fire extinguishing pipeline in the central channel, and the sprinkler fire extinguishing pipeline is suitable for spraying and cooling when the corresponding position of the central channel is melted by the high-temperature material.

[0013] The support structure provided by the present invention, the second partition assembly includes at least three second partitions, at least three second partitions are connected in sequence to form a hollow prismatic structure, the hollow inner cavity of the second partition assembly is the central channel, each side edge of the second partition assembly is connected to a support plate, and two adjacent support plates and the corresponding second partitions form the pressure relief channel.

[0014] The present invention also provides a battery cell module, comprising the above-mentioned support structure and battery cells, wherein the battery cells are arranged in the installation space; wherein, a plurality of battery cells are installed in sequence along a first direction in each of the installation spaces; or, the battery cell module comprises a plurality of groups of support structures connected in sequence along a first direction, and one battery cell is connected in each of the installation spaces of each group of support structures; the first direction is the circumferential axial direction of at least three of the first partitions.

[0015] In the battery core module provided by the present invention, two sides of the battery core are respectively bonded to the two first separators of the installation space through aerogel.

[0016] The present invention also provides a battery system, comprising a shell and a plurality of groups of the above-mentioned battery cell modules, wherein the plurality of groups of battery cell modules are arranged in the shell.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The support structure provided by the present invention includes a support assembly and a first partition assembly. The support assembly and two adjacent first partitions can enclose an installation space. The installation space is open on one side facing away from the support assembly. The surface of the battery cell facing away from the support structure can be exposed to the outside through the open portion. The surface is large and has a large cooling and heat dissipation area. Therefore, the heat dissipation effect of the battery cell supported and connected by the support structure is good, and the service life of the battery cell is extended. A first partition is provided between two adjacent installation spaces, which not only separates the battery cells, increases the heat dissipation effect between the battery cells, and prevents the heat dissipation problem caused by the abutment between the battery cells, but also connects the battery cells around the support assembly, which will not take up too much space and can also increase the support strength of the support structure. Moreover, compared with stacking multiple battery cells and then connecting them as a whole, the support structure provided by the present invention can connect each battery cell separately, which increases the connection strength of the battery cell.

[0019] 2. The support structure provided by the present invention is provided with at least one through hole on each support plate, the hollow inner cavity of the support assembly is a flow cavity, the through hole connects the installation space with the flow cavity, and the explosion-proof valve of the battery cell is suitable for corresponding to the position of the through hole. The setting of the flow cavity can guide and discharge the high-temperature substances ejected from the explosion-proof valve through the through hole and the flow cavity when the explosion-proof valve is triggered due to loss of control of the battery cell, so as to prevent the high-temperature substances from causing damage to other battery cells. The support structure provided by the present invention can not only support the battery cell and enable the battery cell to achieve better heat dissipation effect, but also guide the high-temperature substances generated by the loss of control of the battery cell, thereby improving the safety performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a support structure provided by the present invention from a first perspective;

[0022] Figure 2 A schematic diagram of a support structure provided by the present invention from a second viewing angle;

[0023] Figure 3 A schematic diagram of a support structure provided by the present invention from a third perspective;

[0024] Figure 4 A schematic diagram of a battery cell provided by the present invention from a first perspective;

[0025] Figure 5 A schematic diagram of a battery cell provided by the present invention from a second viewing angle;

[0026] Figure 6 A schematic diagram of a battery cell provided by the present invention from a third viewing angle;

[0027] Figure 7 A schematic diagram of a battery cell module provided by the present invention from a first perspective;

[0028] Figure 8 A schematic diagram of a battery cell module provided by the present invention from a second viewing angle;

[0029] Fig. 9 for Figure 8 Enlarged view of part A.

[0030] Description of reference numerals:

[0031] 1. Support assembly; 11. Support plate; 12. Through hole; 13. Circulation cavity; 131. Central channel; 132. Pressure relief channel; 21. First separator; 3. Installation space; 4. Battery cell; 41. Explosion-proof valve; 42. Heat-resistant tube; 43. First electrode; 44. Second electrode; 5. Second separator assembly; 51. Second separator. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] like Figures 1 to 6 As shown, a support structure is disclosed in this embodiment, including a support component 1 and a first partition component, the first partition component includes at least three first partitions 21, at least three first partitions 21 are connected to the outside of the support component 1, and are distributed around the periphery of the support component 1 at intervals, and every two adjacent first partitions 21 form an installation space 3 with the corresponding positions of the support component 1, and the installation space 3 is suitable for assembling at least one battery cell 4.

[0037] The support assembly 1 and two adjacent first partitions 21 can enclose an installation space 3. The installation space 3 is open on one side facing away from the support assembly 1. The surface of the battery cell 4 facing away from the support structure can be exposed to the outside through the open part. The surface is large and has a large cooling and heat dissipation area. Therefore, the heat dissipation effect of the battery cell 4 supported and connected by the support structure is good, which prolongs the service life of the battery cell 4. A first partition 21 is provided between two adjacent installation spaces 3, which not only separates the battery cells 4, increases the heat dissipation effect between the battery cells 4, and prevents the heat dissipation problem caused by the abutment between the battery cells 4, but also connects the battery cells 4 around the support assembly 1, which does not take up too much space and can also increase the support strength of the support structure. Moreover, compared with stacking multiple battery cells 4 and then connecting them as a whole, the support structure provided by the present invention can connect each battery cell 4 separately, which increases the connection strength of the battery cell 4.

[0038] In this embodiment, the first separator 21 is plate-shaped, has a simple structure, occupies a small space, and has a good separation effect. The distance between two adjacent first separators 21 gradually increases in the direction away from the support assembly 1. The shape of the battery cell 4 is suitable for matching the installation space 3. The battery cell 4 is in a state of one end being large and the other end being small. The surface away from the support assembly 1 is the largest surface, and the largest surface faces outward, which is convenient for heat dissipation and can obtain a larger heat dissipation area.

[0039] As a convertible embodiment, the cross-sectional area of ​​the installation space 3 on one side of a first partition 21 gradually increases in the direction away from the support assembly 1, and the cross-sectional area of ​​the installation space 3 on the other side remains unchanged, and the two types of installation spaces 3 are alternately arranged. Alternatively, the cross-sectional area of ​​the installation space 3 on one side of a first partition 21 gradually increases in the direction away from the support assembly 1, and the cross-sectional area of ​​the installation space 3 on the other side gradually decreases in the direction away from the support assembly 1.

[0040] In a preferred embodiment, at least three first partitions 21 are evenly distributed along the periphery of the support assembly 1 .

[0041] In this embodiment, the support assembly 1 includes at least three support plates 11, at least three support plates 11 are connected in sequence to form a hollow prism-shaped structure, and each side edge of the support assembly 1 is connected to a first separator 21. The cross-section of the installation space 3 in the direction away from the support assembly 1 is trapezoidal, and the battery cell 4 is also trapezoidal. Both sides of the battery cell 4 can be connected to the first separator 21. The surface of the battery cell 4 away from the support assembly 1 is the largest surface, and the heat dissipation effect of this surface is better. Each side edge of the support assembly 1 is connected to a first separator 21, which can enhance the strength of the support assembly 1.

[0042] Specifically, the support assembly 1 may include three support plates 11, which form a hollow triangular prism-shaped structure. The triangular prism-shaped structure is relatively stable. It may also include four support plates 11, which form a hollow quadrangular prism-shaped structure. There are no excessive restrictions on the number of support plates 11 here, and the number of support plates 11 can be adjusted according to the size and number of battery cells 4 to be connected.

[0043] Generally, the prismatic structure includes a top surface, a bottom surface and a plurality of side surfaces, the plurality of side surfaces are connected between the top surface and the bottom surface, the top surface and the bottom surface match in shape, and side ridges are provided between two adjacent side surfaces. For example, if the top surface and the bottom surface are triangular, the prismatic structure is a triangular prism, and the triangular prism has three side ridges. If the top surface and the bottom surface are quadrilateral, the prismatic structure is a quadrangular prism, and the quadrangular prism has four side ridges.

[0044] The at least three support plates 11 can be formed in one piece, welded, or detachably connected by fasteners. The first partition 21 is welded or formed in one piece with the edge of the support assembly 1 .

[0045] As a convertible implementation, the support assembly 1 may be in a tubular shape, and the first partition 21 may be connected along the radial direction of the support assembly 1 .

[0046] In this embodiment, each of the support plates 11 is provided with at least one through hole 12, the hollow inner cavity of the support assembly 1 is a flow cavity 13, the through hole 12 connects the installation space 3 with the flow cavity 13, and the explosion-proof valve 41 of the battery cell 4 is suitable for corresponding to the position of the through hole 12.

[0047] The setting of the flow cavity 13 can guide and discharge the high-temperature substances ejected from the explosion-proof valve 41 through the through hole 12 and the flow cavity 13 when the explosion-proof valve 41 of the battery cell 4 is triggered, so as to prevent the high-temperature substances from damaging other battery cells 4. The support structure provided by the present invention can not only support the battery cell 4 and enable the battery cell 4 to achieve a better heat dissipation effect, but also guide the high-temperature substances generated by the out-of-control explosion-proof valve 4, thereby improving the safety performance of the battery cell 4.

[0048] In this embodiment, a heat-resistant tube 42 is protruding from the explosion-proof valve 41, and the heat-resistant tube 42 is suitable for being arranged relatively to the through hole 12. The heat-resistant tube 42 plays a diversion role, which can not only divert the high-temperature material ejected from the explosion-proof valve 41 to the through hole 12 and the flow cavity 13, but also prevent the high-temperature material ejected from the explosion-proof valve 41 from escaping to the outside and causing damage to other battery cells 4. The heat-resistant tube 42 is made of high-temperature resistant material. Specifically, the heat-resistant tube 42 can be inserted into the through hole, and the heat-resistant tube 42 can be fixed to prevent the heat-resistant tube 42 from deviating from the through hole 12 under the impact of the high-temperature material. The heat-resistant tube 42 can also be abutted against the support plate and arranged relatively to the through hole 12.

[0049] In this embodiment, a heat insulating portion is pasted or coated on each of the support plates 11. The provision of the heat insulating portion can prevent the heat in the flow cavity 13 from being transferred to the surrounding battery cells 4, thereby avoiding triggering a chain reaction of thermal runaway. The heat insulating portion may be a heat insulating material laid on the outer or inner surface of the support plate 11 by a process such as pasting or coating, such as silicone rubber, aerogel felt, foam material, plastic, etc. Alternatively, the heat insulating portion may also be a heat insulating film pasted on the outer or inner surface of the support plate 11, and an opening is provided on the heat insulating film corresponding to the through hole 12.

[0050] The support structure of this embodiment also includes a second partition component 5, which is connected in the circulation cavity 13 and divides the circulation cavity 13 into a central channel 131 and a plurality of pressure relief channels 132. The plurality of pressure relief channels 132 are arranged around the periphery of the central channel 131. Each of the pressure relief channels 132 is connected to at least one of the installation spaces 3 through at least one through hole 12, so as to prevent the battery cells 4 in one installation space 3 from affecting the battery cells 4 in other installation spaces 3 through the circulation cavity 13 when thermal runaway occurs.

[0051] In this embodiment, a sprinkler fire extinguishing pipeline is suitable for being arranged in the central channel 131, and the sprinkler fire extinguishing pipeline is suitable for spraying and cooling when the corresponding position of the central channel 131 is melted by the high-temperature material. The sprinkler fire extinguishing pipeline can be provided with a plurality of nozzles, and each pressure relief channel 132 can correspond to at least one nozzle.

[0052] In this embodiment, the second partition component 5 includes at least three second partitions 51, and the at least three second partitions 51 are connected in sequence to form a hollow prismatic structure. The hollow inner cavity of the second partition component 5 is the central channel 131, and each side edge of the second partition component 5 is connected to a support plate 11, and two adjacent support plates 11 and the corresponding second partitions 51 form the pressure relief channel 132.

[0053] Specifically, the number of the second partition members 51 of the second partition assembly 5 matches the number of the support plates 11. The second partition members 51 may be plate-shaped, and the second partition members 51 may be integrally formed with the support plate 11, or may be welded to the support plate 11. Figure 2 As shown, the second partition 51 is provided with a drain hole, and the water or coolant sprayed by the spray fire extinguishing pipeline can enter the pressure relief channel through the drain hole. Preferably, the drain hole can be arranged corresponding to the through hole 12.

[0054] like Figures 6 to 9 As shown, this embodiment also discloses a battery cell module, including the above-mentioned support structure and battery cells 4. In a specific implementation, the battery cells 4 are arranged in the installation space 3, wherein a plurality of battery cells 4 are sequentially installed in each installation space 3 along a first direction, and two adjacent battery cells 4 are connected by mutually matching grooves and protrusions. In another specific implementation, the battery cells 4 are arranged in the installation space 3, and the battery cell module includes a plurality of groups of support structures sequentially connected along a first direction, and each installation space 3 of each group of support structures is connected to one battery cell 4; the first direction is the circumferential axial direction of at least three of the first partitions 21.

[0055] The installation space 3 is open on one side facing away from the support assembly 1, and the surface of the battery cell 4 facing away from the support structure can be exposed to the outside through the open part. This surface is relatively large and has a large cooling and heat dissipation area. Therefore, the heat dissipation effect of the battery cell 4 supported and connected by the support structure is good, and the service life of the battery cell 4 is extended. A first partition 21 is provided between two adjacent installation spaces 3, which not only separates the battery cells 4, increases the heat dissipation effect between the battery cells 4, and prevents the heat dissipation problem caused by the abutment between the battery cells 4, but also connects the battery cells 4 around the support assembly 1, which does not take up too much space and can also increase the support strength of the support structure. Moreover, compared with stacking multiple battery cells 4 and then connecting them as a whole, the support structure provided by the present invention can connect each battery cell 4 separately, which increases the connection strength of the battery cell 4.

[0056] A first electrode 43 and a second electrode 44 are disposed on the side of the battery cell 4 facing the support assembly 1 , and a wiring gap is disposed between the side and the support assembly 1 .

[0057] In this embodiment, the two sides of the battery cell 4 are respectively bonded to the two first separators 21 of the installation space 3 through aerogel, so that the connection of the battery cell 4 is more stable and the battery cell 4 is not easy to fall off.

[0058] This embodiment also discloses a battery system, including a housing and a plurality of battery modules as described above, wherein the plurality of battery modules are arranged in the housing. The number of battery modules is not limited here, and is selected based on parameters such as actual battery life requirements.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A battery cell module, characterized in that: The invention comprises a supporting structure and a battery cell, wherein the supporting structure comprises: Support components; A first partition assembly, comprising at least three first partitions, wherein the at least three first partitions are connected to the outside of the support assembly and are spaced around the periphery of the support assembly, and every two adjacent first partitions form an installation space with corresponding positions of the support assembly; The battery cells are arranged in the installation spaces; wherein a plurality of battery cells are sequentially installed in each installation space along a first direction; or, the battery cell module comprises a plurality of groups of support structures sequentially connected along a first direction, and each installation space of each group of support structures is connected with one battery cell; The first direction is the circumferential axial direction of at least three of the first partitions; The first separator is in the shape of a plate, and the distance between two adjacent first separators gradually increases in the direction away from the supporting assembly. The shape of the battery cell is suitable for matching the installation space. The battery cell is in a state of having one end larger than the other end, and the surface away from the supporting assembly is the largest surface, and the largest surface faces outward.

2. The battery cell module according to claim 1, characterized in that: The support assembly includes at least three support plates, and the at least three support plates are connected in sequence to form a hollow prism-shaped structure. Each side edge of the support assembly is connected to one of the first separators.

3. The battery cell module according to claim 2, characterized in that: Each of the support plates is provided with at least one through hole, the hollow inner cavity of the support assembly is a flow cavity, the through hole connects the installation space with the flow cavity, and the explosion-proof valve of the battery cell is suitable for corresponding to the position of the through hole.

4. The battery cell module according to claim 3, characterized in that: A heat-resistant tube is protruding from the explosion-proof valve, and the heat-resistant tube is suitable for being arranged relatively at the through hole; And / or, each of the support plates is adhered or coated with a heat insulating portion.

5. The battery cell module according to claim 3 or 4, characterized in that: The support structure also includes a second partition component, which is connected in the circulation cavity and divides the circulation cavity into a central channel and a plurality of pressure relief channels. The plurality of pressure relief channels are arranged around the periphery of the central channel, and each of the pressure relief channels is connected to at least one of the installation spaces through at least one through hole.

6. The battery cell module according to claim 5, characterized in that: The central channel is suitable for being provided with a sprinkler fire extinguishing pipeline, and the sprinkler fire extinguishing pipeline is suitable for spraying and cooling when the corresponding position of the central channel is melted; And / or, the second partition assembly includes at least three second partitions, at least three second partitions are connected in sequence to form a hollow prismatic structure, the hollow inner cavity of the second partition assembly is the central channel, each side edge of the second partition assembly is connected to a support plate, and two adjacent support plates and corresponding second partitions form the pressure relief channel.

7. The battery cell module according to any one of claims 1 to 4, characterized in that: Two sides of the battery core are respectively bonded to the two first separators of the installation space through aerogel.

8. A battery system, characterized in that: include: case; A plurality of groups of battery cell modules according to any one of claims 1 to 7 are arranged in the shell.

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