Fixing structure for energy storage battery module and energy storage battery module
By adopting a fixing structure of end plates and side plates in the energy storage battery module, with the side plates consisting of sub-side plates and reinforced with ribs, the problem that the fixing structure in the prior art cannot simultaneously provide good constraint and reduce processing difficulty is solved, thus achieving more efficient cell fixing and reduced cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-07
AI Technical Summary
Existing fixed structures for long modules of energy storage batteries cannot provide good constraint while reducing processing difficulty and cost.
The device employs a fixed structure including end plates and side plates. The side plates consist of a first sub-side plate and a second sub-side plate, with reinforcing ribs at the connection points. The side plates are connected to the end plates via mounting parts, and mounting holes are provided at the folded edges for fixation. The buffer zone provides expansion and contraction space.
It improves the constraint effect on the width and height of the battery cell, reduces the processing difficulty and cost, and provides appropriate expansion and contraction space when the battery cell expands or contracts, reducing the installation accuracy requirements.
Smart Images
Figure CN224096881U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, specifically providing a fixing structure for an energy storage battery module and an energy storage battery module. Background Technology
[0002] In recent years, the development of green energy sources such as photovoltaics and wind power has led to increased demand for energy storage systems due to the use of time-of-use electricity by industrial and commercial enterprises. Current grid-side and industrial / commercial energy storage systems generally employ liquid-cooled battery systems, using cells with capacities of 280Ah+ and 560Ah+, with individual cells weighing over 5kg and 10kg respectively. Furthermore, the battery boxes designed to accommodate these two types of cells are typically 2000mm long, with individual battery boxes weighing up to 700kg. Currently, most manufacturers house these two types of cells in single-row or double-row cell modules within the battery box, resulting in as many as four or eight battery modules within the box.
[0003] Existing long module structures for energy storage batteries mainly include three types. Scheme 1 uses end plates to clamp the battery cells at both ends and steel strips to fix them on the sides. However, since the steel strips only provide good fixation in the X-axis (length direction), the constraint effect in the Y-axis (width direction) and Z-axis (height direction) is relatively poor, making the cells prone to shifting. Scheme 2 uses end plates at both ends and side plates on the sides, with the side plates and end plates welded together to form a fixed frame that completely encloses the battery cells. The disadvantage is the complexity of manufacturing; the end plates and side plates need precise alignment and welding, requiring strict control over the dimensions of components and cells, which severely tests manufacturing capabilities, resulting in high processing difficulty, high cost, and high installation accuracy requirements. Scheme 3, based on Scheme 2, adds an additional mounting plate to the side plates, allowing side mounting through mounting holes on the mounting plate. The disadvantage is that it further increases processing difficulty and cost. Therefore, how to provide good constraint for the battery cells while reducing the processing difficulty and cost of long module structures has become an urgent technical problem to be solved in this field.
[0004] In view of this, there is a need in the art to propose a new fixing structure for energy storage battery modules and an energy storage battery module to solve the existing problems. Utility Model Content
[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the existing fixed structure for long modules of energy storage batteries cannot reduce the processing difficulty and processing cost while providing a good constraint effect.
[0006] In a first aspect, the present invention provides a fixing structure for an energy storage battery module, the energy storage battery module including a battery cell, the fixing structure including an end plate and a side plate, the end plate and the side plate together forming a frame structure for fixing the battery cell, the side plate including a first sub-side plate and a second sub-side plate connected to each other, and a reinforcing rib provided at the connection between the first sub-side plate and the second sub-side plate.
[0007] In the specific embodiment of the above-described fixing structure for energy storage battery modules, the first sub-side plate and the second sub-side plate extend along the length direction of the battery module, and the first sub-side plate and the second sub-side plate are arranged side by side along the height direction of the battery module. A first folded edge and a second folded edge are respectively provided at the lower edge of the first sub-side plate and the upper edge of the second sub-side plate. The first folded edge and the second folded edge are welded together or detachably connected to form a reinforcing rib at the connection between the first sub-side plate and the second sub-side plate.
[0008] In the specific embodiment of the above-described fixing structure for energy storage battery modules, the ends of the first sub-side plate and the second sub-side plate are respectively provided with a first mounting part and a second mounting part, and the first sub-side plate and the second sub-side plate are respectively welded to or detachably connected to the end plate through the first mounting part and the second mounting part.
[0009] In a specific embodiment of the above-described fixing structure for energy storage battery modules, a buffer zone is provided on the first mounting portion and / or the second mounting portion. The buffer zone is configured as an arc, an arch, or a reciprocating curved shape to provide expansion and contraction space along the length direction of the battery module.
[0010] In the specific embodiment of the above-mentioned fixing structure for energy storage battery modules, the first folded edge and the second folded edge are respectively provided with a first mounting hole and a second mounting hole. The first mounting hole and the second mounting hole are correspondingly arranged to realize the fixed connection between the first folded edge and the second folded edge. And / or, the side plate may also include a third sub-side plate, a fourth sub-side plate or other number of sub-side plates, and a reinforcing rib is formed at the connection of adjacent sub-side plates.
[0011] In the specific embodiment of the above-described fixing structure for energy storage battery modules, a first supporting rib is provided between the first folded edge and the first sub-side plate body, and / or, a second supporting rib is provided between the second folded edge and the second sub-side plate body.
[0012] In the specific embodiment of the above-described fixing structure for energy storage battery modules, a first rolled edge is provided at the upper edge of the first sub-side plate, and / or, a second rolled edge is provided at the lower edge of the second sub-side plate.
[0013] In a second aspect, the present invention also provides an energy storage battery module, the energy storage battery module including any one of the above-described technical solutions for fixing the energy storage battery module.
[0014] In the specific implementation of the above-mentioned energy storage battery module, the battery cells are arranged in a single row, and the positive and negative poles of adjacent battery cells are in opposite directions. The energy storage battery module also includes series current guides and bridging current guides. The series current guides connect the positive and negative poles of adjacent battery cells, and the bridging current guides connect the positive and negative poles of non-adjacent battery cells. The series current guides and the bridging current guides are arranged alternately so that the positive and negative poles of the energy storage battery module are on the same side.
[0015] In a specific embodiment of the above-mentioned energy storage battery module, the battery cells are arranged in two rows, with the positive and negative poles of adjacent battery cells facing opposite directions. The energy storage battery module also includes a series-connected current guide plate, which connects the positive and negative poles of adjacent battery cells so that the positive and negative poles of the energy storage battery module are on the same side.
[0016] With the above technical solution adopted, the side plate of the fixing structure for energy storage battery modules of this utility model includes a first sub-side plate and a second sub-side plate connected to each other. Compared with the prior art solution of using steel strips on the sides, setting the side plate as a first sub-side plate and a second sub-side plate, and setting reinforcing ribs at the connection between the first sub-side plate and the second sub-side plate, improves the structural strength of the side plate, thereby improving the constraint effect on the width and height of the battery cell. On the other hand, compared with the prior art method of welding the side plate to the end plate to form a fixing frame and completely wrapping the battery cell, the first sub-side plate and the second sub-side plate of this utility model effectively constrain the battery cell without completely wrapping it, thereby reducing the processing difficulty and cost of the fixing structure, and also reducing the installation accuracy requirements of the fixing structure and the battery cell. This solves the problem that existing fixing structures for long energy storage battery modules cannot reduce processing difficulty and cost while providing good constraint effect. Attached Figure Description
[0017] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:
[0018] Figure 1 This is a schematic diagram of the structure of the energy storage battery module with a single row of battery cells according to this utility model.
[0019] Figure 2 This is a structural schematic diagram of the side plate of the fixing structure for energy storage battery module of this utility model;
[0020] Figure 3This is a partially enlarged view of the first and second sub-side plates of the fixing structure for an energy storage battery module according to this utility model;
[0021] Figure 4 This is a current flow diagram of the energy storage battery module with a single row of battery cells according to this utility model (where the arrows indicate the current flow direction);
[0022] Figure 5 This is a current flow diagram of the energy storage battery module with double-row cell arrangement of this utility model (where the arrows indicate the current flow direction).
[0023] List of reference numerals in the attached diagram:
[0024] 1. Energy storage battery module; 11. Fixing structure; 111. End plate; 112. Side plate; 1121. First sub-side plate; 11211. First folded edge; 11212. First mounting part; 11213. First mounting hole; 11214. First support rib; 11215. First rolled edge; 1122. Second sub-side plate; 11221. Second folded edge; 11222. Second mounting part; 11225. Second rolled edge; 1123. Reinforcing rib; 1124. Buffer zone; 12. Battery cell; 13. Series guide plate; 14. Bridging guide plate. Detailed Implementation
[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0026] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] like Figures 1-3 As shown, to address the problem that existing long battery module fixing structures 11 cannot provide good constraint while reducing processing difficulty and cost, the energy storage battery module 1 of this invention includes arrayed battery cells 12. The fixing structure 11 includes an end plate 111 and a side plate 112, which together form a frame structure for fixing the battery cells 12. The side plate 112 includes a first sub-side plate 1121 and a second sub-side plate 1122 connected to each other. The first sub-side plate 1121 and the second sub-side plate 1122 extend along the length direction of the battery module and are arranged side by side along the height direction of the battery module. A first folded edge 11211 and a second folded edge 11221 are respectively provided at the lower edge of the first sub-side plate 1121 and the upper edge of the second sub-side plate 1122. The first folded edge 11211 and the second folded edge 11221 are respectively provided with a first mounting hole 11213 and a second mounting hole. The first mounting hole 11213 and the second mounting hole are correspondingly provided to realize the fixed connection of the first folded edge 11211 and the second folded edge 11221. The first folded edge 11211 and the second folded edge 11221 are fixedly connected at the connection of the first sub-side plate 1121 and the second sub-side plate 1122 to form a reinforcing rib 1123.
[0029] A first mounting portion 11212 and a second mounting portion 11222 are respectively provided at the ends of the first sub-side plate 1121 and the second sub-side plate 1122. The first sub-side plate 1121 and the second sub-side plate 1122 are welded to the end plate 111 through the first mounting portion 11212 and the second mounting portion 11222, respectively. A buffer zone 1124 is also provided on the first mounting portion 11212 and the second mounting portion 11222. The buffer zone 1124 is set in an arc shape to provide expansion space along the length direction of the battery module.
[0030] In the above-described embodiment, during the installation of the fixing structure 11 for the energy storage battery module 1 of this utility model, the battery cells 12 are first arranged in a row, and the first sub-side plate 1121 and the second sub-side plate 1122 are fixed by fasteners such as bolts and nuts through the first mounting hole 11213 and the second mounting hole. Then, the first mounting part 11212 and the second mounting part 11222 on the first sub-side plate 1121 and the second sub-side plate 1122 are welded to the end plate 111, so that the first sub-side plate 1121 and the second sub-side plate 1122 together with the end plate 111 form a frame structure for fixing the battery cell 12 array, thereby achieving the fixing of the battery cell 12 array.
[0031] The advantages of the above-described configuration are as follows: Compared to the existing technology that uses steel strips on the sides, this embodiment sets the side plate 112 in the form of a first sub-side plate 1121 and a second sub-side plate 1122. Furthermore, by providing reinforcing ribs 1123 at the connection between the first sub-side plate 1121 and the second sub-side plate 1122, the structural strength of the side plate 112 is improved, thereby enhancing the constraint effect on the width and height of the battery cell 12. On the other hand, compared to the existing technology that welds the side plate 112 to the end plate 111 to form a fixed frame that completely encloses the battery cell 12, the first sub-side plate 1121 and the second sub-side plate 1122 of this invention effectively constrain the battery cell 12 without completely enclosing it. This reduces the processing difficulty and cost of the fixed structure 11, and also lowers the installation accuracy requirements between the fixed structure 11 and the battery cell 12. This solves the problem that existing long module fixed structures for energy storage batteries cannot provide a good constraint effect while reducing processing difficulty and cost. Furthermore, by providing an arc-shaped buffer zone 1124 on the first mounting portion 11212 and the second mounting portion 11222, when the battery cell 12 expands or contracts during charging and discharging, the arc-shaped buffer zone 1124 can provide a certain amount of expansion and contraction space for the battery cell 12 along the length direction of the battery module, thereby avoiding excessive compression or excessive loosening between the battery cell 12 and the fixed frame. Those skilled in the art can also set the buffer zone 1124 to an arch shape or a reciprocating bending shape similar to a spring, or to other common shapes that can provide a buffering effect; these modifications are all within the protection scope of this utility model.
[0032] Furthermore, regarding the connection method of the first folded edge 11211 and the second folded edge 11221 mentioned above, and the connection method of the first mounting part 11212 and the second mounting part 11222 to the end plate 111 respectively, those skilled in the art will understand that the first folded edge 11211 and the second folded edge 11221 can also be connected by welding, thereby improving the connection strength between the first sub-side plate 1121 and the second sub-side plate 1122. Similarly, the first mounting part 11212 and the second mounting part 11222 can also be detachably connected to the end plate 111, such as by screwing, thereby making the disassembly of the first sub-side plate 1121, the second sub-side plate 1122 and the end plate 111 more convenient, and also facilitating the installation of the side plate 112 and the end plate 111, reducing the requirement for installation accuracy. In addition, the side plate 112 may also include a third sub-side plate, a fourth sub-side plate, or other number of sub-side plates, and a reinforcing rib 1123 is formed at the connection between adjacent sub-side plates. Those skilled in the art can adjust the number of sub-side plates according to actual needs, and these changes are all within the protection scope of this utility model.
[0033] like Figures 1-3 As shown, in one possible implementation, a first supporting rib 11214 is provided between the first folded edge 11211 and the body of the first sub-side plate 1121, and a second supporting rib (not shown in the figure) is provided between the second folded edge 11221 and the body of the second sub-side plate 1122. A first rolled edge 11215 is provided at the upper edge of the first sub-side plate 1121, and a second rolled edge 11225 is provided at the lower edge of the second sub-side plate 1122.
[0034] The advantages of the above-described arrangement are as follows: by providing a first supporting rib 11214 and a second supporting rib between the first folded edge 11211 and the body of the first sub-side plate 1121, and between the second folded edge 11221 and the body of the second sub-side plate 1122, respectively, the connection strength between the first folded edge 11211 and the body of the first sub-side plate 1121, and between the second folded edge 11221 and the body of the second sub-side plate 1122, is ensured. Furthermore, by providing a first rolled edge 11215 and a second rolled edge 11225 on the first sub-side plate 1121 and the second sub-side plate 1122, respectively, the structural strength of the first sub-side plate 1121 and the second sub-side plate 1122 along the length of the battery module is also improved, thereby ensuring the constraint effect of the fixing structure 11 of this invention on the battery cell 12.
[0035] Furthermore, this utility model also provides an energy storage battery module 1, which includes an array of battery cells 12 and a fixing structure 11 for the energy storage battery module 1 as described in any of the above embodiments. For example... Figure 4As shown (the arrows in the figure indicate the direction of current flow), the cells 12 are arranged in a single row, and the positive and negative poles of adjacent cells 12 are opposite. The energy storage battery module 1 also includes a series current guide plate 13 and a bridging current guide plate 14. The series current guide plate 13 connects the positive and negative poles of adjacent cells 12, and the bridging current guide plate 14 connects the positive and negative poles of non-adjacent cells 12. The series current guide plate 13 and the bridging current guide plate 14 are arranged alternately so that the positive and negative poles of the energy storage battery module 1 are on the same side.
[0036] The advantages of the above implementation are as follows: For single-row arranged cells 12, the energy storage battery module 1 in this embodiment connects the positive and negative terminals of two adjacent cells 12 through series current guide plates 13, and connects the positive and negative terminals of non-adjacent cells 12 through bridging current guide plates 14, so that the positive and negative terminals of the energy storage battery module 1 can be located on the same side, thereby reducing the space occupied by the positive and negative terminal wiring in the length direction of the energy storage battery module 1, which is more conducive to the arrangement of the energy storage battery module 1. Furthermore, regarding the aforementioned series-connected current guide plate 13 and bridging current guide plate 14, although the accompanying drawings show one form of the series-connected current guide plate 13 and bridging current guide plate 14 (with the bridging current guide plate 14 spanning two battery cells 12 in the middle), this is not the only embodiment, nor is it a limitation on the form of the series-connected current guide plate 13 and bridging current guide plate 14 in this utility model. Those skilled in the art can also set the series-connected current guide plate 13 and bridging current guide plate 14 to other bridging forms, as long as it can satisfy the requirement that the positive and negative poles of the battery module are on the same side. These changes are all within the protection scope of this utility model.
[0037] like Figure 5 As shown, in one possible implementation, the battery cells 12 are arranged in two rows with the positive and negative poles of adjacent battery cells 12 facing opposite directions. The energy storage battery module 1 also includes a series guide plate 13, which connects the positive and negative poles of adjacent battery cells 12 so that the positive and negative poles of the energy storage battery module 1 are on the same side.
[0038] The advantages of the above implementation are as follows: For the dual-flow arranged cells 12, the energy storage battery module 1 in this embodiment connects the positive and negative terminals of adjacent cells 12 through the series-connected current guide plate 13, and connects the positive and negative terminals of adjacent cells 12 in different columns, so that the positive and negative terminals of the dual-flow arranged cells 12 are connected in series to form a circuit, and finally the positive and negative terminals of the energy storage battery module 1 are located on the same side, which reduces the space occupied by the positive and negative terminals in the length direction of the energy storage battery module 1, and is more conducive to the arrangement of the energy storage battery module 1.
[0039] It should be noted that the above embodiments are only used to illustrate the principle of this utility model and are not intended to limit the scope of protection of this utility model. Without departing from the principle of this utility model, those skilled in the art can adjust the above structure so that this utility model can be applied to more specific application scenarios.
[0040] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.
Claims
1. A fixing structure (11) for an energy storage battery module (1), the energy storage battery module (1) including a battery cell (12), the fixing structure (11) including an end plate (111) and a side plate (112), the end plate (111) and the side plate (112) together forming a frame structure for fixing the battery cell (12), characterized in that, The side plate (112) includes a first sub-side plate (1121) and a second sub-side plate (1122) that are connected to each other, and a reinforcing rib (1123) is provided at the connection between the first sub-side plate (1121) and the second sub-side plate (1122).
2. The fixing structure (11) for the energy storage battery module (1) according to claim 1, characterized in that, The first sub-side plate (1121) and the second sub-side plate (1122) extend along the length direction of the battery module, and the first sub-side plate (1121) and the second sub-side plate (1122) are arranged side by side along the height direction of the battery module. The lower edge of the first sub-side plate (1121) and the upper edge of the second sub-side plate (1122) are respectively provided with a first folded edge (11211) and a second folded edge (11221). The first folded edge (11211) and the second folded edge (11221) are welded together or detachably connected to form a reinforcing rib (1123) at the connection between the first sub-side plate (1121) and the second sub-side plate (1122).
3. The fixing structure (11) for the energy storage battery module (1) according to claim 1, characterized in that, The first sub-side plate (1121) and the second sub-side plate (1122) are respectively provided with a first mounting part (11212) and a second mounting part (11222) at their ends. The first sub-side plate (1121) and the second sub-side plate (1122) are respectively welded to the end plate (111) or detachably connected through the first mounting part (11212) and the second mounting part (11222).
4. The fixing structure (11) for the energy storage battery module (1) according to claim 3, characterized in that, A buffer zone (1124) is provided on the first mounting part (11212) and / or the second mounting part (11222), the buffer zone (1124) being configured as an arc, an arch, or a reciprocating curved shape to provide expansion space along the length direction of the battery module.
5. The fixing structure (11) for the energy storage battery module (1) according to claim 2, characterized in that, The first folded edge (11211) and the second folded edge (11221) are respectively provided with a first mounting hole (11213) and a second mounting hole. The first mounting hole (11213) and the second mounting hole are respectively provided to realize the fixed connection between the first folded edge (11211) and the second folded edge (11221). And / or, the side plate (112) may also include a third sub-side plate, a fourth sub-side plate or other number of sub-side plates, and a reinforcing rib (1123) is formed at the connection of adjacent sub-side plates.
6. The fixing structure (11) for the energy storage battery module (1) according to claim 2, characterized in that, A first supporting rib (11214) is provided between the first folded edge (11211) and the body of the first sub-side plate (1121), and / or, a second supporting rib is provided between the second folded edge (11221) and the body of the second sub-side plate (1122).
7. The fixing structure (11) for the energy storage battery module (1) according to claim 2, characterized in that, The first sub-side plate (1121) has a first rolled edge (11215) at its upper edge, and / or the second sub-side plate (1122) has a second rolled edge (11225) at its lower edge.
8. An energy storage battery module (1), characterized in that, The energy storage battery module (1) includes an array of battery cells (12) and a fixing structure (11) for the energy storage battery module (1) as described in any one of claims 1-7.
9. The energy storage battery module (1) according to claim 8, characterized in that, The battery cells (12) are arranged in a single row, and the positive and negative poles of adjacent battery cells (12) are opposite. The energy storage battery module (1) also includes a series current guide plate (13) and a bridging current guide plate (14). The series current guide plate (13) connects the positive and negative poles of adjacent battery cells (12), and the bridging current guide plate (14) connects the positive and negative poles of non-adjacent battery cells (12). The series current guide plate (13) and the bridging current guide plate (14) are arranged alternately so that the positive and negative poles of the energy storage battery module (1) are on the same side.
10. The energy storage battery module (1) according to claim 8, characterized in that, The cells (12) are arranged in two rows, and the positive and negative poles of adjacent cells (12) are opposite. The energy storage battery module (1) also includes a series guide plate (13), which connects the positive and negative poles of adjacent cells (12) so that the positive and negative poles of the energy storage battery module (1) are on the same side.