End plate and battery module
By designing crossed diagonal reinforcement and connecting rib structures on the end plate of the battery module, the problem of insufficient strength in the central area of the existing end plate is solved, the resistance to deformation is improved, and the safety of the battery module is ensured.
Patent Information
- Application Number
- CN202420758839.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The distribution of reinforcement ribs on the end plate of the existing battery module leads to insufficient strength in the central area, which is prone to deformation under the action of the expansion force of the battery cell, posing a safety hazard.
A end plate is designed, which has two crossed diagonal reinforcement ribs at the four corners of the reinforcement frame, and a connecting rib structure is set in the area surrounded by the two diagonal reinforcement ribs and the reinforcement frame, so that the two diagonal reinforcement ribs cross at the center of the end plate, thereby increasing the strength of the central area.
Through this design, the strength of the central area of the end plate is greater than that of the edge area, which improves the resistance to deformation and avoids deformation and safety hazards caused by the expansion force of the battery cell.
Smart Images
Figure CN222581375U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery module frames, in particular to an end plate and a battery module. Background Art
[0002] Soft-pack battery modules are widely used due to their good safety, light weight, large capacity and low internal resistance. The basic structure of existing soft-pack battery modules can be found in a battery module disclosed in the Chinese invention patent application with application publication number CN116387761A. The battery module includes an end plate and a plurality of single cells, namely a cell, which is a soft-pack lithium battery. Each single cell is located between the end plates on both sides of the battery module, and each single cell can be fixed by installing long bolts on the two end plates.
[0003] For the end plate of the battery module, in order to take into account weight reduction, space saving and anti-deformation ability, reinforcing ribs are usually set on the thin plate body to meet the requirements. Just like the end plate of the battery module mentioned above, its strength is improved by vertically and horizontally crossing reinforcing ribs, and its reinforcing ribs are basically evenly distributed on the entire surface of the end plate. This distribution of reinforcing ribs makes the strength of the central area of the end plate basically consistent with the strength of the edge area. However, in actual use, the central area of the end plate needs greater strength. Since the battery cell will bulge after long-term use, and the bulging degree is often more serious in the center of the battery cell, the expansion force of the battery cell is very large, and the end plate will be subject to greater force, especially the central area of the end plate that contacts the center of the battery cell needs to withstand the large expansion force of the battery cell, and the central area of the above-mentioned end plate is not strong enough and is prone to deformation. It cannot well restrain the expansion force of the battery cell, resulting in safety hazards in the battery module. Utility Model Content
[0004] The purpose of the utility model is to provide an end plate to solve the problem that the distribution of the reinforcing ribs on the current end plate makes the strength of the central area of the end plate low and easy to deform under the action of the expansion force of the battery cell; the purpose of the utility model is also to provide a battery module to solve the above-mentioned problem.
[0005] The technical solution of the end plate of the utility model is:
[0006] An end plate includes an end plate body and a reinforcing rib structure arranged on the end plate body, the reinforcing rib structure includes a reinforcing frame arranged at the edge of the end plate body, the reinforcing frame has four corners, the reinforcing rib structure also includes two diagonal reinforcing ribs, one of the diagonal reinforcing ribs is connected to two diagonals of the reinforcing frame, and the other diagonal reinforcing rib is connected to the other two diagonals of the reinforcing frame, a connecting rib structure is provided in the area enclosed by the two diagonal reinforcing ribs and the reinforcing frame, and the two diagonal reinforcing ribs cross at the center of the end plate body so that the strength of the central area of the end plate is greater than the strength of the remaining areas.
[0007] Furthermore, the intersection of the two diagonal reinforcement ribs forms an intersection portion, and the connecting rib structure includes a first connecting reinforcement rib connected between the intersection portion and the reinforcement frame.
[0008] Furthermore, the connecting rib structure also includes a second connecting reinforcement rib connected between the first connecting reinforcement rib and the diagonal reinforcement rib.
[0009] Furthermore, the second connecting reinforcement ribs on both sides of the diagonal reinforcement ribs are arranged perpendicular to each other.
[0010] Furthermore, the width of the diagonal reinforcement rib is greater than the width of the first connecting reinforcement rib, and the width of the first connecting reinforcement rib is greater than the width of the second connecting reinforcement rib.
[0011] Furthermore, the first connecting reinforcement rib and the second connecting reinforcement rib are arranged perpendicular to each other.
[0012] Furthermore, the first connecting reinforcement rib is perpendicular to the side of the reinforcement frame to which it is connected.
[0013] Furthermore, the thickness of the diagonal reinforcement rib is greater than the thickness of the first connecting reinforcement rib.
[0014] Furthermore, connecting parts are provided at the four corners of the reinforced frame, connecting holes are provided on the connecting parts, and the connecting parts are flush with the diagonal reinforcing ribs.
[0015] The beneficial effects of the end plate of the utility model: the utility model is improved on the basis of the end plate in the prior art, the distribution of the reinforcing ribs on the end plate body is changed, two intersecting diagonal reinforcing ribs are set based on the four corners of the reinforcing frame, and a connecting rib structure is set in each area surrounded by the two diagonal reinforcing ribs and the reinforcing frame. The two diagonal reinforcing ribs intersect at the center of the end plate body. The two intersecting diagonal reinforcing ribs are used in conjunction with the connecting rib structure to ensure the overall structure of the end plate, while making the strength of the central area of the end plate greater than the strength of the remaining areas. The strength of the central area of the end plate is improved, and the end plate can take into account weight reduction and space saving while improving its anti-deformation ability, and is not easy to deform under the action of the expansion force of the battery cell.
[0016] The technical solution of the battery module of the utility model is:
[0017] A battery module includes an end plate, which includes an end plate body and a reinforcing rib structure arranged on the end plate body, the reinforcing rib structure includes a reinforcing frame arranged at the edge of the end plate body, the reinforcing frame has four corners, the reinforcing rib structure also includes two diagonal reinforcing ribs, one of the diagonal reinforcing ribs is connected to two diagonals of the reinforcing frame, and the other diagonal reinforcing rib is connected to the other two diagonals of the reinforcing frame, a connecting rib structure is provided in the area enclosed by the two diagonal reinforcing ribs and the reinforcing frame, and the two diagonal reinforcing ribs cross at the center of the end plate body so that the strength of the central area of the end plate is greater than the strength of the remaining areas.
[0018] Furthermore, the intersection of the two diagonal reinforcement ribs forms an intersection portion, and the connecting rib structure includes a first connecting reinforcement rib connected between the intersection portion and the reinforcement frame.
[0019] Furthermore, the connecting rib structure also includes a second connecting reinforcement rib connected between the first connecting reinforcement rib and the diagonal reinforcement rib.
[0020] Furthermore, the second connecting reinforcement ribs on both sides of the diagonal reinforcement ribs are arranged perpendicular to each other.
[0021] Furthermore, the width of the diagonal reinforcement rib is greater than the width of the first connecting reinforcement rib, and the width of the first connecting reinforcement rib is greater than the width of the second connecting reinforcement rib.
[0022] Furthermore, the first connecting reinforcement rib and the second connecting reinforcement rib are arranged perpendicular to each other.
[0023] Furthermore, the first connecting reinforcement rib is perpendicular to the side of the reinforcement frame to which it is connected.
[0024] Furthermore, the thickness of the diagonal reinforcement rib is greater than the thickness of the first connecting reinforcement rib.
[0025] Furthermore, connecting parts are provided at the four corners of the reinforced frame, connecting holes are provided on the connecting parts, and the connecting parts are flush with the diagonal reinforcing ribs.
[0026] The beneficial effects of the battery module of the present invention: the present invention is improved on the basis of the battery module in the prior art, the distribution of the reinforcing ribs on the end plate body of the end plate is changed, two intersecting diagonal reinforcing ribs are arranged based on the four corners of the reinforcing frame, and a connecting rib structure is arranged in each area surrounded by the two diagonal reinforcing ribs and the reinforcing frame, and the two diagonal reinforcing ribs intersect at the center of the end plate body. The two intersecting diagonal reinforcing ribs are used in conjunction with the connecting rib structure to ensure the overall structure of the end plate, while making the strength of the central area of the end plate greater than the strength of the remaining areas, thereby improving the strength of the central area of the end plate, and enabling the end plate to reduce weight and save space while improving its anti-deformation ability, and is not easily deformed under the action of the expansion force of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of an embodiment of the end plate of the utility model.
[0028] In the figure: 1. end plate body; 2. reinforced frame; 3. connection hole; 4. first diagonal reinforcement rib; 5. second diagonal reinforcement rib; 6. first connection reinforcement rib; 7. second connection reinforcement rib. DETAILED DESCRIPTION
[0029] The battery module end plate of the utility model changes the distribution of the reinforcing ribs on the end plate body, and two intersecting diagonal reinforcing ribs are arranged at the four corners of the reinforcing frame, and a connecting rib structure is arranged in each area surrounded by the two diagonal reinforcing ribs and the reinforcing frame. The two diagonal reinforcing ribs intersect at the center of the end plate body. The two intersecting diagonal reinforcing ribs are used in conjunction with the connecting rib structure to ensure the overall structure of the end plate, while making the strength of the central area of the end plate greater than the strength of the edge area, thereby improving the strength of the central area of the end plate, enabling the end plate to reduce weight and save space while improving its anti-deformation ability, and is not easily deformed under the action of the expansion force of the battery cell.
[0030] Embodiment of the end plate of the utility model:
[0031] like Figure 1 As shown, the end plate of the battery module includes an end plate body 1 and a reinforcing rib structure arranged on the end plate body 1, the reinforcing rib structure includes a reinforcing frame 2, a first diagonal reinforcing rib 4, a second diagonal reinforcing rib 5, a first connecting reinforcing rib 6, and a second connecting reinforcing rib 7. Through the reinforcing rib structure, the overall structural strength of the end plate can be ensured while taking into account weight reduction and space saving, and the central area of the end plate has a higher deformation resistance.
[0032] The end plate body 1 has an inner side surface for facing the battery cell of the battery module, and the thickness direction of the end plate body 1 is perpendicular to the inner side surface. The reinforcing rib structure is arranged on the outer side surface of the end plate body 1, and the reinforcing rib structure is formed integrally with the end plate body 1, and each reinforcing rib is integrally connected with the end plate body 1. The end plate body 1 is generally rectangular and has four side edges. The reinforcing frame 2 is arranged at the edge of the end plate body 1, and the reinforcing frame 2 is flush with the edge of the end plate body 1. Accordingly, the reinforcing frame 2 is generally rectangular and has four side edges. The intersection of each adjacent two side edges forms a corner, so that the reinforcing frame 2 has four corners. The end plate body 1 is provided with lugs at the four corners of the reinforcing frame 2, and the lugs constitute a connecting portion. The lugs are provided with connecting holes 3, and the connecting holes 3 are used to pass long bolts to fix the end plate and the battery cell of the battery module together. The outward side surface of the lug facing away from the inner side surface of the end plate main body 1 is flush with the outward side surface of the reinforcing frame 2 facing away from the inner side surface of the end plate main body 1. The reinforcing frame 2 is integrally connected to the lug. The connecting hole 3 is set using the flat surface of the connecting part with the same thickness as the reinforcing frame 2, which can reduce the stress at the connecting hole 3.
[0033] The first diagonal reinforcement rib 4 and the second diagonal reinforcement rib 5 constitute two diagonal reinforcement ribs, the first diagonal reinforcement rib 4 is connected to two diagonals of the reinforcement frame 2, the second diagonal reinforcement rib 5 is connected to the other two diagonals of the reinforcement frame 2, the two diagonals are opposite corners, the two diagonal reinforcement ribs cross at the center of the end plate body 1, the two diagonal reinforcement ribs and the reinforcement frame 2 form four triangular areas, each area is provided with a connecting rib structure, the connecting rib structure includes a first connecting reinforcement rib 6 and a second connecting reinforcement rib 7, the distribution of the reinforcement ribs of the first connecting reinforcement rib 6 makes the strength of the central area of the end plate greater than the strength of the remaining areas, and the strength of the central area is higher than that of the edge area, which can well restrain the expansion force of the battery cell.
[0034] The intersection of the first diagonal reinforcement rib 4 and the second diagonal reinforcement rib 5 forms an intersection, and the intersection and the four sides of the reinforcement frame 2 are connected with first connection reinforcement ribs 6, which are perpendicular to the sides of the reinforcement frame 2 to which they are connected, and each first connection reinforcement rib 6 and the diagonal reinforcement rib are generally distributed radially. The first connection reinforcement rib 6 and the diagonal reinforcement rib are connected with second connection reinforcement ribs 7, which are arranged perpendicularly to each other, and two parallel second connection reinforcement ribs 7 are arranged in the area surrounded by the first connection reinforcement rib 6, the diagonal reinforcement rib and the reinforcement frame 2, and the second connection reinforcement ribs 7 on both sides of each diagonal reinforcement rib are arranged perpendicularly to each other, and the adjacent two second connection reinforcement ribs 7 on both sides of the diagonal reinforcement rib are connected at the same position of the diagonal reinforcement rib. The width of the diagonal reinforcement rib is greater than the width of the first connection reinforcement rib 6, the width of the first connection reinforcement rib 6 is greater than the width of the second connection reinforcement rib 7, the thickness of the diagonal reinforcement rib is consistent with the thickness of the reinforcement frame 2, and the thickness of the diagonal reinforcement rib is greater than the thickness of the first connection reinforcement rib 6, taking into account both weight reduction and bending resistance requirements.
[0035] In other embodiments, the connecting rib structure may also only have connecting ribs connecting two diagonal reinforcing ribs.
[0036] In other implementations, the connecting rib structure may also have more than two first connecting reinforcing ribs, and in this case, the first connecting reinforcing ribs are no longer perpendicular to the side of the reinforced frame.
[0037] In other embodiments, the width of the diagonal reinforcement rib may also be consistent with the width of the first connecting reinforcement rib.
[0038] In other embodiments, the first connecting reinforcement rib and the second connecting reinforcement rib may also be arranged at an acute angle.
[0039] In other embodiments, the thickness of the diagonal reinforcement ribs may also be consistent with the thickness of the first connecting reinforcement ribs.
[0040] Embodiment of the battery module of the utility model:
[0041] The battery module includes an end plate and a plurality of battery cells. There are two end plates, which are respectively arranged at the two ends of the battery module in the battery cell stacking direction. Each battery cell is arranged between the two end plates and each battery cell is fixed by the two end plates. The end plate in this embodiment has the same structure as the end plate in the above-mentioned end plate embodiment, which will not be repeated here.
[0042] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An end plate, comprising an end plate body and a reinforcing rib structure arranged on the end plate body, characterized in that: The reinforcement rib structure includes a reinforcement frame arranged on the edge of the end plate body, the reinforcement frame has four corners, and the reinforcement rib structure also includes two diagonal reinforcement ribs, one of which is connected to two diagonals of the reinforcement frame, and the other is connected to the other two diagonals of the reinforcement frame. A connecting rib structure is provided in the area enclosed by the two diagonal reinforcement ribs and the reinforcement frame, and the two diagonal reinforcement ribs cross at the center of the end plate body so that the strength of the central area of the end plate is greater than the strength of the remaining areas.
2. The end plate according to claim 1, characterized in that: The intersection of the two diagonal reinforcement ribs forms an intersection portion, and the connecting rib structure includes a first connecting reinforcement rib connected between the intersection portion and the reinforcement frame.
3. The end plate according to claim 2, characterized in that: The connecting rib structure also includes a second connecting reinforcement rib connected between the first connecting reinforcement rib and the diagonal reinforcement rib.
4. The end plate according to claim 3, characterized in that: The second connecting reinforcement ribs on both sides of the diagonal reinforcement ribs are arranged perpendicular to each other.
5. The end plate according to claim 3 or 4, characterized in that: The width of the diagonal reinforcing ribs is greater than the width of the first connecting reinforcing ribs, and the width of the first connecting reinforcing ribs is greater than the width of the second connecting reinforcing ribs.
6. The end plate according to claim 3 or 4, characterized in that: The first connecting reinforcement rib and the second connecting reinforcement rib are arranged perpendicular to each other.
7. The end plate according to claim 2, 3 or 4, characterized in that: The first connecting reinforcement rib is perpendicular to the side edge of the reinforcement frame to which it is connected.
8. The end plate according to claim 2, 3 or 4, characterized in that: The thickness of the diagonal reinforcement rib is greater than the thickness of the first connecting reinforcement rib.
9. The end plate according to claim 1, 2, 3 or 4, characterized in that: Connecting parts are arranged at the four corners of the reinforced frame, connecting holes are arranged on the connecting parts, and the connecting parts are flush with the diagonal reinforcing ribs.
10. A battery module, characterized in that: The end plate comprises any one of claims 1 to 9.
Citation Information
Patent Citations
Conducting sheet, busbar bracket, busbar mounting structure, battery module and battery
CN116387761A