Battery module
By adopting a coplanar cell design in the battery module, sharing the housing structure and partition, the problem of increasing cell wall thickness and buffer foam in the battery pack 800V platform is solved, the space utilization and volume energy density are improved, and the manufacturing cost is reduced.
Patent Information
- Application Number
- CN202421076003.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-16
AI Technical Summary
In the battery pack 800V platform, in order to increase the accumulation of the system voltage platform, more single cells need to be stuffed into the same volume, which leads to an increase in the cell wall thickness and buffer foam, occupying more battery layout space, reducing energy density, and increasing the number of parts and bill of materials costs.
A battery module design is adopted in which a plurality of coplanar cells reduce the large surface wall thickness and buffer thickness through a common housing structure and partition, thereby reducing the space occupied by the cell in the length direction.
It improves the space utilization and volume energy density of the battery module, reduces manufacturing costs and production complexity, while reducing the number of parts and reducing the cost of the bill of materials.
Smart Images
Figure CN222637438U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of new energy batteries, and in particular to a battery module. Background Art
[0002] With the application of the 800V battery pack platform, more single cells need to be packed into the same volume to increase the accumulation of the system voltage platform. More cells mean more cell wall thickness and buffer foam, which will inevitably take up more battery layout space and is not conducive to improving energy density. The number of components will also increase, taking up more bill of materials costs.
[0003] The inventor has found that in the current battery design, the battery module is inevitably composed of multiple single cells; at the same time, the large surfaces of adjacent cells are often filled with buffer foam to absorb the expansion force. Therefore, the more single cells there are in the battery module, the thicker the wall is, and the more space the battery module occupies; at the same time, the number of cells and foam will accumulate, which will occupy the space in the cumulative length direction of the cells in the battery module. Utility Model Content
[0004] The utility model aims to provide a battery module with higher space utilization and outstanding volume energy density.
[0005] The embodiment of the utility model is achieved as follows:
[0006] A battery module proposed in the utility model includes a plurality of coplanar battery cells and a plurality of buffer components; the plurality of coplanar battery cells are arranged at intervals; the coplanar battery cells include a shell structure, at least one partition and a plurality of winding cores, a receiving groove is provided in the shell structure, at least one partition is arranged in the receiving groove and divides the receiving groove into at least two installation cavities, the winding core is arranged in the installation cavity; the buffer components are arranged between adjacent shell structures.
[0007] Optionally, the shell structure includes a first large surface, a first side surface, a second large surface and a second side surface that are connected;
[0008] The first large surface is arranged in parallel with the second large surface and has the same length, and the first side surface is arranged in parallel with the second side surface and has the same length.
[0009] Optionally, the lengths of the first large surface and the second large surface are greater than the lengths of the first side surface and the second side surface.
[0010] Optionally, at least one of the partitions has one end connected to the first side surface and the other end connected to the second side surface;
[0011] The at least one partition is arranged parallel to the first large surface.
[0012] Optionally, one partition is provided, and the partition is respectively connected to the midpoint of the first side surface and the midpoint of the first side surface; or
[0013] A plurality of partitions are provided, and the plurality of partitions are arranged at intervals.
[0014] Optionally, the buffer is disposed between the first large surface of one of the coplanar battery cells and the second large surface of an adjacent coplanar battery cell.
[0015] Optionally, the space reduction formula of the battery module is:
[0016] L=L1+L2
[0017] Wherein, L1 is the space reduced by the shell structure; L2 is the space reduced by the buffer component.
[0018] Optionally, the wall thickness of the shell structure is consistent with the wall thickness of the partition.
[0019] Optionally, the space reduction formula of the shell structure is:
[0020] L1=2n*t1-n*t1
[0021] Wherein, n is the number of the shell structures; t1 is the wall thickness of the shell structure and the wall thickness of the partition.
[0022] Optionally, the space reduced by the buffer is:
[0023] L2=(2n-1)*t2-(n-1)*t2
[0024] Wherein, n is the number of the shell structures; t2 is the wall thickness of the buffer component.
[0025] The beneficial effects of the embodiments of the utility model are:
[0026] When achieving the same voltage platform or capacity as the traditional solution, the present battery module has certain spatial redundancy design advantages over the traditional solution. The present battery module arranges coplanar battery cells so that at least two winding cores share a shell structure, which reduces the wall thickness of at least one large surface and the thickness of at least one buffer member compared to the traditional solution, thereby reducing the space occupied by multiple coplanar battery cells in the length direction, thereby improving the volume energy density of the battery module, while also improving the production efficiency of the battery module and reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 This is a schematic diagram of the structure of a coplanar battery cell according to an embodiment of the utility model;
[0029] Figure 2 This is a schematic diagram of the structure of the housing structure of an embodiment of the utility model;
[0030] Figure 3 It is a side view of the housing structure of an embodiment of the utility model;
[0031] Figure 4 for Figure 3 Sectional view of AA in the middle;
[0032] Figure 5 This is a schematic structural diagram of a battery module according to an embodiment of the utility model having two coplanar battery cells.
[0033] Icons: 010-battery module; 100-coplanar battery cells; 101-first coplanar battery cells; 102-second coplanar battery cells; 110-shell structure; 111-first large surface; 112-first side surface; 113-second large surface; 114-second side surface; 115-installation cavity; 120-partition; 130-top cover structure; 200-buffer. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.
[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0037] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0038] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.
[0040] In the prior art, the battery module 010 is inevitably composed of multiple single cells. A single single cell is composed of a rectangular shell and a cell arranged in the shell; the rectangular shell of the single cell has two symmetrically arranged wider large surfaces (i.e., the first large surface 111 or the second large surface 113 in this embodiment).
[0041] For example, two independent single cells form the battery module 010. When the large surfaces of the two single cells are arranged adjacent to each other, the wall thickness of the two adjacent large surfaces of the two single cells will be accumulated, and the buffer foam will also be filled between the large surfaces of the adjacent cells. It can be understood that there is a wall thickness overlap area between the adjacent single cells, and the wall thickness overlap area includes: the wall thickness of the large surface of one of the single cells, the wall thickness of the buffer foam, and the wall thickness of the large surface of the other single cell.
[0042] Therefore, the more single cells are arranged in the battery module 010, the thicker the wall will be, the more foam will be accumulated, the more overlapping areas of the wall thickness between adjacent single cells will be, and the more space will be occupied in the cumulative length direction of the single cells of the battery module 010.
[0043] Therefore, the utility model proposes a battery module 010, which, under the same voltage platform or capacity battery solution, occupies a smaller space for battery cell grouping, has a higher space utilization rate, and has an outstanding volume energy density.
[0044] Please refer to Figure 5 The present embodiment provides a battery module 010, comprising a plurality of coplanar battery cells 100 and a plurality of buffer components 200; the plurality of coplanar battery cells 100 are arranged at intervals; the coplanar battery cells 100 comprise a shell structure 110, at least one partition 120 and a plurality of winding cores, a receiving groove is provided in the shell structure 110, at least one partition 120 is provided in the receiving groove and divides the receiving groove into at least two installation cavities 115, and a winding core is provided in the installation cavity 115; buffer components 200 are provided between adjacent shell structures 110.
[0045] It can be understood that by setting the coplanar battery cells 100, at least two winding cores share a shell structure 110, and a partition 120 is set in the shell structure 110 to isolate adjacent winding cores and improve the rigidity of the coplanar battery cells 100. Therefore, when the battery module 010 and the traditional solution achieve the same voltage platform or capacity composition, the battery module 010 has a certain spatial redundancy design advantage over the traditional solution; the battery module 010 reduces the wall thickness of at least one large surface and the thickness of at least one buffer 200 compared to the traditional solution by setting the coplanar battery cells 100 so that at least two winding cores share a shell structure 110, thereby reducing the space occupied by multiple coplanar battery cells 100 in the length direction, improving the volume energy density of the battery module 010, and at the same time improving the production efficiency of the battery module 010 and reducing the manufacturing cost.
[0046] In the present invention, the battery module 010 includes coplanar battery cells 100 .
[0047] In this embodiment, please refer to Figure 1 The coplanar battery cell 100 includes a top cover structure 130, a shell structure 110, a partition 120 and two winding cores.
[0048] For details, please refer to Figure 2-Figure 4The housing structure 110 includes a first large surface 111, a first side surface 112, a second large surface 113, a second side surface 114 and a bottom surface; the bottom surface is connected to the first large surface 111, the first side surface 112, the second large surface 113 and the second side surface 114 to form a receiving groove. The housing structure 110 is a rectangular housing frame structure, the first large surface 111 and the second large surface 113 are arranged in parallel and have the same length, the first side surface 112 and the second side surface 114 are arranged in parallel and have the same length, and the length of the first large surface 111 and the second large surface 113 is greater than the length of the first side surface 112 and the second side surface 114.
[0049] For details, please refer to Figure 2 and Figure 4 The partition 120 is disposed in the receiving groove, and one end of the partition 120 is connected to the midpoint of the first side surface 112, and the other end is connected to the midpoint of the second side surface 114; the partition 120 is disposed parallel to the first large surface 111 or the second large surface 113. The partition 120 divides the receiving groove into two installation cavities 115 with the same capacity.
[0050] The wall thickness of the shell structure 110 is consistent with the thickness of the partition 120 , that is, the thickness of the partition 120 is consistent with the wall thickness of the first large surface 111 , the wall thickness of the first side surface 112 , the wall thickness of the second large surface 113 and the wall thickness of the second side surface 114 .
[0051] In this embodiment, the wall thickness of the first large surface 111 and the wall thickness of the second large surface 113 are t2, and the value range of the wall thickness is: t2 = 1 to 1.2 mm.
[0052] Understandably, please refer to Figure 1 and Figure 5 After the two winding cores are installed in the installation cavity 115 of the shell structure 110, the top cover structure 130 is installed on the two installation cavities 115, that is, a coplanar battery cell 100 is installed and formed. Then the overlapping area of the wall thickness between the two winding cores of the coplanar battery cell 100 is only the thickness of the partition 120, which reduces the wall thickness of a large surface and the thickness of a buffer 200 compared with the traditional solution; then when the coplanar battery cell 100 realizes the same voltage platform or capacity composition compared with the traditional solution, the space of the coplanar battery cell 100 in the cumulative length direction is reduced, thereby reducing the space occupied by multiple coplanar battery cells 100 and improving the volume energy density of the battery module 010.
[0053] In this embodiment, the housing structure 110 and the partition plate 120 can be integrally formed by extruding a profile. Of course, in other embodiments, they can also be assembled after being separately formed.
[0054] In some optional embodiments, multiple partitions 120 may be provided, that is, multiple partitions 120 are spaced apart and arranged in the receiving groove of the housing structure 110. For example, when two partitions 120 are provided, the two partitions 120 divide the receiving groove of the housing into three equal installation cavities 115. When three partitions 120 are provided, the three partitions 120 divide the receiving groove of the housing into four equal installation cavities 115.
[0055] In this embodiment, please refer to Figure 5 The battery module 010 includes a buffer 200 ; the buffer 200 is disposed between two adjacent coplanar battery cells 100 and is used to absorb the expansion force between the large surfaces of the adjacent coplanar battery cells 100 .
[0056] In this embodiment, please refer to Figure 5 Two coplanar battery cells 100 are provided, namely a first coplanar battery cell 101 and a second coplanar battery cell 102; when the first coplanar battery cell 101 and the second coplanar battery cell 102 are arranged adjacent to each other, the buffer 200 is arranged between the first large surface 111 of the first coplanar battery cell 101 and the second large surface 113 of the adjacent second coplanar battery cell 102.
[0057] Of course, in other embodiments, the number of coplanar battery cells 100 may also be three, four, or more. When a plurality of coplanar battery cells 100 are adjacently arranged, the buffer member 200 may be arranged in sequence between the plurality of coplanar battery cells 100 .
[0058] The thickness of the buffer 200 is t1, which is the dimension after assembly pre-tightening; and the thickness range of t1 is: t1 = 0.8 to 2.5 mm.
[0059] In this embodiment, the buffer component 200 may be a buffer foam made of materials such as PE and PU.
[0060] In this embodiment, the space reduction formula of the battery module 010 is:
[0061] L=L1+L2
[0062] Wherein, L1 is the space reduced by the shell structure 110 ; L2 is the space reduced by the buffer component 200 .
[0063] In this embodiment, when the wall thickness of the shell structure 110 is consistent with the wall thickness of the partition 120, the formula for reducing the space of the shell structure 110 is:
[0064] L1=2n*t1-n*t1
[0065] Wherein, n is the number of the shell structures 110 ; t1 is the wall thickness of the shell structure 110 and the wall thickness of the partition 120 .
[0066] It can be understood that, compared with the outer shell of a traditional single battery cell, the two winding cores of the coplanar battery cell 100 share a shell structure 110, and the wall thickness of a large surface between the two winding cores is reduced.
[0067] In this embodiment, the space reduced by the buffer 200 is:
[0068] L2=(2n-1)*t2-(n-1)*t2
[0069] Wherein, n is the number of the shell structures 110 ; and t2 is the wall thickness of the buffer component 200 .
[0070] Understandably, please refer to Figure 5 In order to achieve the same capacity and voltage requirements, the present embodiment adopts two coplanar battery cells 100, the two coplanar battery cells 100 have four winding cores, and only one buffer 200 is required between the two coplanar battery cells 100; while the traditional solution requires four single battery cells, and three buffers 200 are required between the four single battery cells.
[0071] Therefore, the use of two coplanar battery cells 100 in this embodiment reduces two buffer components 200 compared to the traditional solution, and also reduces the thickness of the two buffer components 200 in terms of space.
[0072] In summary, when the battery module 010 proposed in the present invention and the traditional solution achieve the same voltage platform or capacity composition, the battery module 010 has certain space redundancy design advantages over the traditional solution; the battery module 010 sets coplanar battery cells 100 so that at least two winding cores share a shell structure 110, which reduces the wall thickness of at least one large surface and the thickness of at least one buffer member 200 compared to the traditional solution, thereby reducing the space occupied by multiple coplanar battery cells 100 in the length direction, thereby improving the volume energy density of the battery module 010, and at the same time also improving the production efficiency of the battery module 010 and reducing the manufacturing cost.
[0073] At the same time, fewer battery cells means less BOM (bill of materials) usage, which will also lead to lower BOM (bill of materials) and development costs.
[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A battery module, characterized in that: include: A plurality of coplanar battery cells, wherein the plurality of coplanar battery cells are arranged at intervals; The coplanar battery cell comprises a shell structure, at least one partition and a plurality of winding cores, wherein a receiving groove is provided in the shell structure, at least one partition is arranged in the receiving groove and divides the receiving groove into at least two installation cavities, and the winding core is arranged in the installation cavity; A plurality of buffer components are disposed between adjacent shell structures.
2. The battery module according to claim 1, characterized in that: The shell structure comprises a first large surface, a first side surface, a second large surface and a second side surface which are connected to each other; The first large surface is arranged in parallel with the second large surface and has the same length, and the first side surface is arranged in parallel with the second side surface and has the same length.
3. The battery module according to claim 2, characterized in that: The lengths of the first large surface and the second large surface are greater than the lengths of the first side surface and the second side surface.
4. The battery module according to claim 2, characterized in that: One end of at least one of the partitions is connected to the first side surface, and the other end is connected to the second side surface; The at least one partition is arranged parallel to the first large surface.
5. The battery module according to claim 4, characterized in that: One partition is provided, and the partition is connected to the midpoint of the first side surface and the midpoint of the first side surface respectively; or A plurality of partitions are provided, and the plurality of partitions are arranged at intervals.
6. The battery module according to claim 2, characterized in that: The buffer is disposed between the first large surface of one of the coplanar battery cells and the second large surface of an adjacent coplanar battery cell.
7. The battery module according to claim 1, characterized in that: The space reduction formula of the battery module is: L=L1+L2 Wherein, L1 is the space reduced by the shell structure; L2 is the space reduced by the buffer component.
8. The battery module according to claim 7, characterized in that: The wall thickness of the shell structure is consistent with the wall thickness of the partition.
9. The battery module according to claim 8, characterized in that: The space reduction formula of the shell structure is: L1=2n*t1-n*t1 Wherein, n is the number of the shell structures; t1 is the wall thickness of the shell structure and the wall thickness of the partition.
10. The battery module according to claim 7, characterized in that: The formula for reducing the space of the buffer is: L2=(2n-1)*t2-(n-1)*t2 Wherein, n is the number of the shell structures; t2 is the wall thickness of the buffer component.