Battery module and battery pack
By designing a battery pack structure with a cylindrical outer shell and ventilation holes in the module bracket, the problems of insufficient rigidity and strength of the battery pack and poor heat dissipation were solved, achieving a compact structure, good vibration resistance, and high heat dissipation efficiency.
Patent Information
- Application Number
- CN202422911912.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing battery packs lack sufficient rigidity and strength, have poor heat dissipation, and low energy density.
Design a battery module and battery pack, which adopts a cylindrical shell, with ventilation holes on the module bracket, and the inner ring of the shell and the outer ring of the module are fixed by interference fit heat fitting process, combined with a limiting structure to increase rigidity and strength, and the ventilation holes improve heat dissipation.
It improves the structural rigidity and strength of the battery pack, enhances heat dissipation performance, increases energy density, and reduces costs.
Smart Images
Figure CN223502078U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power battery technology, and in particular to a battery module and battery pack. Background Technology
[0002] New energy vehicles are new types of vehicles that use new energy technology batteries to reduce greenhouse gas emissions. There are many technical barriers in the use of new energy batteries for automobiles and energy storage, such as vibration reduction and impact resistance technology, heat dissipation performance technology, and high energy density technology.
[0003] With the development of new energy vehicles, innovations in new energy vehicle batteries are also increasing. However, there is still room for improvement in technologies such as vibration reduction, heat dissipation, and energy density. Existing battery packs lack sufficient stiffness and strength, have poor heat dissipation, and low energy density. Utility Model Content
[0004] The purpose of this invention is to provide a battery module and battery pack that can solve the technical problems of insufficient rigidity and strength, poor heat dissipation, and low energy density of the battery pack.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] This utility model designs a battery module, including a battery cell and a module bracket. The module bracket includes an upper bracket and a lower bracket arranged opposite to each other, forming a cavity between the upper bracket and the lower bracket. The battery cell is disposed in the cavity. The end faces of the upper bracket and the lower bracket are provided with ventilation holes that communicate with each other, and the ventilation holes are arranged along the length direction of the battery cell.
[0007] As a preferred embodiment, the upper support includes a vertically arranged upper disc and upper legs, the ventilation hole is provided on the end face of the upper disc, and the end face of the upper disc is also provided with a battery cell hole and a connecting hole, the battery cell hole is located on the side of the ventilation hole, and the connecting hole is located in the middle of the upper disc.
[0008] As a preferred embodiment, the lower support includes a vertically arranged lower disc and lower support legs. The ventilation hole is located on the end face of the lower disc. The end face of the lower disc is also provided with a battery cell hole and a connecting hole. The battery cell hole is located on the side of the ventilation hole, and the connecting hole is located in the middle of the lower disc.
[0009] Furthermore, the upper support leg has a groove at its end and the lower support leg has a protrusion at its end, and the groove and the protrusion cooperate to form a snap-fit structure.
[0010] This utility model also designs a battery pack, including an outer shell and the aforementioned battery module, wherein the battery module is disposed in the cavity of the outer shell.
[0011] As a preferred embodiment, the outer shell includes an upper shell and a lower shell. The upper shell has an upper vent at one end, and the lower shell has a lower vent at one end. The upper vent, the lower vent, and the connecting hole are interconnected.
[0012] As a preferred embodiment, the battery module is disposed within the cavity of the lower housing, and the battery module is interference-fitted with the lower housing.
[0013] Furthermore, the lower housing has a limiting step on the side near the lower vent, and a lower flange surface on the side away from the lower vent, with the battery module located between the limiting step and the lower flange surface.
[0014] As a preferred embodiment, the battery pack further includes a rubber pad disposed at the mating point between the upper and lower housings.
[0015] Furthermore, the upper housing end is provided with an upper flange surface that mates with the lower flange surface, and the rubber gasket is disposed at the mating point between the upper flange surface and the lower flange surface.
[0016] The beneficial effects of this utility model are:
[0017] This utility model provides a battery module and battery pack that can improve the structural rigidity and strength of the battery pack; improve the heat dissipation effect of the battery pack; improve the energy density of the battery pack; and reduce costs due to its simple structure.
[0018] The battery pack provided by this utility model adopts a cylindrical shell, resulting in a compact structure. The modules are bidirectionally fixed at both ends, and the outer ring of the module is fixed to the inner ring of the shell using an interference fit process, increasing the rigidity and strength of the battery pack and thus improving its vibration resistance. The shell is designed as a cylindrical ventilation duct, and ventilation holes are provided on the module bracket, which facilitates heat dissipation and improves the battery pack's heat dissipation performance. The cylindrical shell battery pack has a compact structure, is fixed on all four sides, and the cylindrical space, except for the central part which houses the module wiring, is used for discharging the battery cells, greatly increasing the energy density of the battery pack. This battery pack structure is simple, reducing the use of end plates and structural adhesive; the fixing method is simple, using an interference fit and end shell fixing; and it has a cost-reducing effect.
[0019] Therefore, this invention can solve the technical problems of insufficient rigidity and strength of battery packs, poor heat dissipation, and low energy density. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a partial explosion of the battery pack.
[0021] Figure 2 for Figure 1 A sectional view.
[0022] Figure 3This is a 3D schematic diagram of the battery module.
[0023] Figure 4 This is a cross-sectional view of the module bracket connection.
[0024] Figure 5 This is the front view of the module bracket.
[0025] Figure 6 This is a cross-sectional view of the battery pack.
[0026] Explanation of reference numerals in the attached figures:
[0027] The outer casing 1 (upper casing 11, lower casing 12), battery module 2, battery cell 3, module bracket 4 (upper bracket 41, lower bracket 42, groove 43, protrusion 44, ventilation hole 45, battery cell hole 46, connecting hole 47), rubber pad 5, upper ventilation port 6, upper flange face 7, lower flange face 8, limiting step 9, and lower ventilation port 10. Detailed Implementation
[0028] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effects achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to 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" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] This invention provides a battery module and battery pack, which improves the structural rigidity of the battery pack to meet vibration resistance requirements; enhances the heat dissipation performance of the battery pack structure to meet thermal management requirements; and increases the energy density of the battery pack to meet range requirements. This invention solves the technical problems of insufficient rigidity and strength, poor heat dissipation, and low energy density in battery packs.
[0032] This utility model relates to a battery module, including a battery cell 3 and a module support 4. The module support 4 includes an upper support 41 and a lower support 42 arranged opposite to each other, forming a cavity between the upper support 41 and the lower support 42, and the battery cell 3 is disposed in the cavity. The end faces of the upper support 41 and the lower support 42 are provided with ventilation holes 45 that communicate with each other, and the ventilation holes 45 are arranged along the length direction of the battery cell 3.
[0033] The upper support 41 includes a vertically arranged upper disc and an upper leg. A ventilation hole 45 is located on the end face of the upper disc. The end face of the upper disc also has a battery cell hole 46 and a connecting hole 47. The battery cell hole 46 is located on the side of the ventilation hole 45, and the connecting hole 47 is located in the middle of the upper disc. The lower support 42 includes a vertically arranged lower disc and a lower leg. A ventilation hole 45 is located on the end face of the lower disc. The end face of the lower disc also has a battery cell hole 46 and a connecting hole 47. The battery cell hole 46 is located on the side of the ventilation hole 45, and the connecting hole 47 is located in the middle of the lower disc. The end of the upper leg has a groove 43, and the end of the lower leg has a protrusion 44. The groove 43 and the protrusion 44 cooperate to form a snap-fit structure.
[0034] This utility model also relates to a battery pack, including an outer shell 1, a rubber pad 5, and the aforementioned battery module 2, wherein the battery module 2 is disposed in the cavity of the outer shell 1.
[0035] The outer casing 1 includes an upper casing 11 and a lower casing 12. A rubber gasket 5 is disposed at the mating point between the upper casing 11 and the lower casing 12. The upper casing 11 has an upper vent 6 at its end, and the lower casing 12 has a lower vent 10 at its end. The upper vent 6, lower vent 10, and connecting hole 47 are interconnected. The battery module 2 is disposed within the cavity of the lower casing 12, and the battery module 2 is interference-fitted with the lower casing 12. The lower casing 12 has a limiting step 9 on the side near the lower vent 10, and a lower flange surface 8 on the side away from the lower vent 10. The battery module 2 is located between the limiting step 9 and the lower flange surface 8. The upper casing 11 has an upper flange surface 7 at its end that mates with the lower flange surface 8, and the rubber gasket 5 is disposed at the mating point between the upper flange surface 7 and the lower flange surface 8.
[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings.
[0037] This utility model proposes a battery module and a battery pack, the design of which is shown in the figure below. Figure 1 , 2 As shown, the battery pack structure includes an outer shell, a module bracket, a rubber pad, and battery cells.
[0038] Among them, the module bracket is as follows Figures 3 to 5 As shown, the module bracket includes an upper bracket and a lower bracket. Ventilation holes are provided within the upper and lower brackets to improve the heat dissipation performance of the battery pack. A cell fixing structure is provided on the module bracket; the upper bracket has a groove structure, and the lower bracket has a protrusion structure. The groove and protrusion cooperate to fix the cell within the module bracket. Structural adhesive is applied to the gaps between the cell ends and the module bracket to prevent the cell from moving within the module bracket. The cell and the module bracket together form a battery module.
[0039] outer shell as Figure 6 As shown, the outer casing includes an upper casing and a lower casing. The cylindrical lower casing has an upper vent at one end and a stepped structure for limiting the end of the battery module. The inner diameter of the lower casing is 0.2mm smaller than the outer diameter of the module bracket to achieve interference fit. The other end of the lower casing has a lower flange for sealing with the flange of the upper casing. The rubber gasket, as shown, has the same outer diameter as the inner diameter of the lower casing. After the battery module is fixed, the rubber gasket is placed on top of the battery module, slightly above the flange of the lower casing. The upper casing has an upper flange at one end and an upper vent at the other end. The inner diameter of the upper casing is 10mm smaller than the inner diameter of the lower casing. When the flanges of the upper and lower casings are sealed, the upper casing compresses the rubber gasket to achieve axial limiting of the battery module.
[0040] Advantages of this utility model:
[0041] 1. This invention proposes a novel battery pack structure. The battery pack adopts a cylindrical shell, which makes the battery pack structure compact. The modules are bidirectionally limited and fixed at both ends, and the outer ring of the module is fixed to the inner ring of the shell using an interference fit process. This increases the rigidity and strength of the battery pack, thereby improving its vibration resistance.
[0042] 2. This invention proposes a new battery pack structure, in which the shell is designed as a cylindrical ventilation duct and ventilation holes are provided on the module bracket, which is conducive to heat dissipation of the battery pack and improves the heat dissipation performance of the battery pack.
[0043] 3. This invention proposes a new battery pack structure. The cylindrical outer shell battery pack structure is compact and fixed on all four sides. Except for the central part which is for module wiring, the remaining space in the cylindrical space is used for discharge cells, which greatly improves the energy density of the battery pack.
[0044] 4. This invention proposes a new battery pack structure, which is simple in structure, reduces the use of end plates and structural adhesive, and has a simple fixing method, using interference heat sleeves and end shells for limiting; it has a cost reduction effect.
[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A battery module, characterized in that: The battery includes a battery cell (3) and a module bracket (4). The module bracket (4) includes an upper bracket (41) and a lower bracket (42) arranged opposite to each other. A cavity is formed between the upper bracket (41) and the lower bracket (42), and the battery cell (3) is disposed in the cavity. The end faces of the upper bracket (41) and the lower bracket (42) are provided with ventilation holes (45) that communicate with each other. The ventilation holes (45) are arranged along the length direction of the battery cell (3).
2. The battery module according to claim 1, characterized in that: The upper support (41) includes a vertically arranged upper disc and an upper support leg. The ventilation hole (45) is provided on the end face of the upper disc. The end face of the upper disc is also provided with a battery cell hole (46) and a connecting hole (47). The battery cell hole (46) is located on the side of the ventilation hole (45), and the connecting hole (47) is located in the middle of the upper disc.
3. A battery module according to claim 2, characterized in that: The lower support (42) includes a vertically arranged lower disc and a lower support leg. The ventilation hole (45) is provided on the end face of the lower disc. The end face of the lower disc is also provided with a battery cell hole (46) and a connecting hole (47). The battery cell hole (46) is located on the side of the ventilation hole (45), and the connecting hole (47) is located in the middle of the lower disc.
4. A battery module according to claim 3, characterized in that: The upper support leg has a groove (43) at its end and the lower support leg has a protrusion (44) at its end. The groove (43) and the protrusion (44) cooperate to form a snap-fit structure.
5. A battery pack, characterized in that: It includes a housing (1) and a battery module as described in any one of claims 2 to 4, wherein the battery module (2) is disposed within the cavity of the housing (1).
6. A battery pack according to claim 5, characterized in that: The outer shell (1) includes an upper shell (11) and a lower shell (12). The upper shell (11) has an upper vent (6) at one end, and the lower shell (12) has a lower vent (10) at one end. The upper vent (6), the lower vent (10), and the connecting hole (47) are interconnected.
7. A battery pack according to claim 6, characterized in that: The battery module (2) is disposed in the cavity of the lower housing (12), and the battery module (2) is interference-fitted with the lower housing (12).
8. A battery pack according to claim 6, characterized in that: The lower housing (12) has a limiting step (9) on the side near the lower vent (10), and a lower flange surface (8) on the side away from the lower vent (10). The battery module (2) is located between the limiting step (9) and the lower flange surface (8).
9. A battery pack according to claim 8, characterized in that: The battery pack also includes a rubber pad (5), which is disposed at the mating point between the upper housing (11) and the lower housing (12).
10. A battery pack according to claim 9, characterized in that: The upper housing (11) has an upper flange surface (7) at its end that mates with the lower flange surface (8), and the rubber gasket (5) is located at the mating point between the upper flange surface (7) and the lower flange surface (8).