A battery module

Abstract

The utility model relates to battery technology field especially, and particularly relates to a battery module. The battery module of the utility model, including electric core subassembly, electric core subassembly includes multiple electric core, and one heat dissipation board is clamped between every two adjacent electric core, and the heat dissipation board includes main body board and foam layer, and the main body board is sleeved in the outside of foam layer, and the foam layer is used for emitting the heat generated by electric core. The battery module of the utility model can increase the effective surface area of heat dissipation board and air contact through the foam layer of heat dissipation board, improves the uniformity of air distribution in foam layer, improves the heat exchange efficiency and avoids local overheating, thereby improves the overall performance and life consistency of battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module. Background Technology

[0002] The efficiency and lifespan of a battery module are closely related to its operating temperature. Currently, battery module cooling is mainly divided into air cooling and liquid cooling. Air cooling uses a fan to guide ambient air into the battery box through the air inlet, and after contacting the battery module, it is exhausted from the air outlet, thus carrying away the heat generated by the battery module during operation. However, air cooling has problems such as localized overheating of the battery module, uneven heat dissipation, and low heat exchange efficiency, which affect the overall performance and lifespan consistency of the battery module. Utility Model Content

[0003] The purpose of this utility model is to provide a battery module that has uniform heat dissipation and high heat exchange efficiency, thereby improving its overall performance and lifespan consistency.

[0004] To achieve the above objectives, this utility model proposes a battery module, including a cell assembly, which includes multiple cells. A heat dissipation plate is sandwiched between every two adjacent cells. The heat dissipation plate includes a main plate and a foam layer. The main plate is fitted over the foam layer, and the foam layer is used to dissipate the heat generated by the cells.

[0005] Optionally, multiple heat dissipation channels are arranged through the foam layer along the width direction of the battery module. The cross-section of the heat dissipation channels is irregular in shape to increase the effective surface area of ​​the heat dissipation plate in contact with the air.

[0006] Optionally, the heat sink is covered with an insulating film.

[0007] Furthermore, a fastening component is provided on the outer periphery of the battery cell assembly for securing the battery cell assembly.

[0008] Optionally, the fastening assembly includes two end plates, which are respectively attached to the outer surface of the end cells at both ends of the cell assembly along its length direction. A fixing strap is wrapped around the two end plates to fix the two end plates and the cell assembly.

[0009] Optionally, the surface of the end plate is provided with limiting ribs to limit the relative position between the fixing strap and the end plate.

[0010] Optionally, the end plate is provided with a limiting groove for defining the relative position between the fixing strap and the end plate, and a portion of the fixing strap passes through the limiting groove.

[0011] Optionally, the end plate is provided with a weight-reducing groove along the height direction of the battery module. A reinforcing rib is provided within the weight-reducing groove, extending along the height direction of the battery module, with its opposite sides connected to the inner surface of the weight-reducing groove. Multiple reinforcing ribs divide the weight-reducing groove into multiple weight-reducing holes, with the overlapping ends of every two adjacent reinforcing ribs meeting at the inner surface of the weight-reducing groove.

[0012] Compared with the prior art, the technical solution of this utility model has the following beneficial effects: The battery module of this utility model can increase the effective surface area of ​​the heat sink in contact with the air through the foam layer of the heat sink, improve the uniformity of air distribution in the foam layer, improve heat exchange efficiency and avoid local overheating, thereby improving the overall performance and lifespan consistency of the battery module. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the battery module in one embodiment of the present invention.

[0015] Figure 2 This is a structural schematic diagram of the battery module from another perspective in one embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the heat sink in one embodiment of the present invention.

[0017] In the picture:

[0018] 1-Battery cell; 2-Fastening assembly; 21-End plate; 211-Limiting rib; 212-Weight reduction groove; 213-Reinforcing rib; 3-Heat dissipation plate; 31-Main plate; 32-Foam layer; 33-Insulating film; 22-Fixing strap. Detailed Implementation

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can mean that two components are internally connected. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0021] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “center,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, 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.

[0022] The terms “first”, “second”, etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0023] The terms “including,” “comprising,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0024] The terms "an embodiment," "as an example," or "in an example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which may be included in at least one embodiment or example of this application. These illustrative expressions do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Where there is no conflict, the embodiments and features described in these embodiments can be combined in a suitable manner.

[0025] Please see Figure 1 and Figure 2This utility model provides a battery module, including a cell assembly and a fastening assembly 2. The cell assembly includes multiple cells 1, which are distributed along the length of the battery module. A heat sink 3 is sandwiched between every two adjacent cells 1. Optionally, the heat sink 3 is fixedly connected to the cells 1 by means of double-sided adhesive or fasteners with thermally conductive properties, thereby improving the heat conduction efficiency between the cells 1 and the heat sink 3, which is beneficial for heat dissipation and convenient for installation. Furthermore, it can prevent displacement between the heat sink 3 and the cells 1 during transportation or installation, thus improving the stability of the battery module.

[0026] In some embodiments, the fastening assembly 2 includes a fixing strap 22 and two end plates 21. The battery cell assembly and the heat sink 3 are located between the two end plates 21. The two end plates 21 are respectively attached to the outer surfaces of the end cells at both ends of the battery cell assembly along its length direction. That is, the two end plates 21 are respectively attached to the outer surfaces of the first and last cells 1 along the length direction of the battery cell assembly. The fixing strap 22 is wrapped around the two end plates 21 to secure the two end plates 21 and the battery cell assembly. The fixing strap 22 enables the two end plates 21 to clamp and fix the battery cell assembly, and provides protection for the battery cell assembly. Optionally, the fixing strap 22 is a ring-shaped metal strip, such as a steel strip. During installation, the fastener is fitted over the two end plates 21 and the battery cell assembly from above or below, extending to the outside of the two end plates 21. The size of the fastener is slightly smaller than the combined size of the two end plates 21 and the battery cell assembly, allowing it to apply a certain tightening force to the two end plates 21 and improve the reliability of the connection. Two fixing straps 22 can be used, which are spaced apart and wrapped around the end plates 21 to secure and bind the end plates 21 and the battery cell assembly, further enhancing the stability of the connection.

[0027] In one embodiment, the surface of the end plate 21 is provided with a limiting rib 211. Optionally, the limiting rib 211 protrudes from the surface of the end plate 21 to form the limiting rib 211, or the limiting rib 211 is fixed to the end plate 21 by welding, fastener connection or other connection methods, to limit the relative position between the fixing strap 22 and the end plate 21, thereby improving the stability of the connection. Optionally, the limiting rib 211 extends along the height direction of the battery module, and the number of limiting ribs 211 can be one or more. In one example, the number of limiting ribs 211 is two, and the two limiting ribs 211 are spaced apart on the surface of the end plate 21, further improving the stability of the connection.

[0028] In another embodiment, the end plate 21 is provided with a limiting groove (not shown). Optionally, the limiting groove extends along the width direction of the battery module, and a portion of the fixing strap 22 passes through the limiting groove. The limiting groove restricts the relative position between the fixing strap 22 and the end plate 21, preventing the fixing strap 22 from sliding and improving the stability of the installation.

[0029] Please continue reading. Figure 1 In some embodiments, the end plate 21 has a weight-reduction groove 212, which is formed by a recess in the end plate 21 along the height direction of the battery module, thus facilitating weight reduction. Optionally, a reinforcing rib 213 is provided within the weight-reduction groove 212, extending along the height direction of the battery module. The opposite sides of the reinforcing rib 213 are connected to the inner surface of the weight-reduction groove 212, improving the structural strength of the end plate 21 and thereby enhancing the overall strength and stability of the battery module. The reinforcing rib 213 is integrally formed with the end plate 21, or the reinforcing rib 213 is fixedly connected to the inner surface of the weight-reduction groove 212 by welding or bonding.

[0030] Optionally, there may be multiple reinforcing ribs 213, which divide the interior of the weight-reducing groove 212 into multiple weight-reducing holes. The projection of the weight-reducing holes along the height direction of the battery module is triangular, trapezoidal, or rectangular. In one embodiment, the overlapping ends of every two adjacent reinforcing ribs 213 meet on the inner surface of the weight-reducing groove 212, reducing weight while ensuring the structural strength of the end plate 21. Specifically, the opposite sides of each reinforcing rib 213 are respectively connected to two opposite or adjacent surfaces of the weight-reducing groove 212.

[0031] Example 1

[0032] The heat sink 3 includes a main plate 31, which has heat dissipation holes (not shown) to improve heat dissipation performance. Specifically, the heat dissipation holes extend along the width direction of the battery module, and the projection of the heat dissipation holes along the width direction of the battery module is rectangular, circular, or the like. Optionally, there are multiple heat dissipation holes, which are evenly distributed along the height direction of the battery module to facilitate uniform heat dissipation.

[0033] Example 2

[0034] Please combine Figure 3 In this embodiment, the heat sink 3 includes a main plate 31 and a foam layer 32. Both the main plate 31 and the foam layer 32 can be made of thermally conductive materials such as aluminum, aluminum alloy, or copper. The main plate 31 is hollow. Specifically, the main plate 31 has a receiving groove for accommodating the foam layer 32 along the width direction of the battery module. The main plate 31 is fitted over the foam layer 32. The foam layer 32 has multiple heat dissipation channels penetrating through it along the width direction of the battery module. The cross-section of the heat dissipation channels is irregular to increase the effective surface area of ​​the heat sink 3 in contact with the air. Since the foam material of the foam layer 32 can form multiple irregularly shaped heat dissipation channels, and the inner surface of these channels has a certain roughness, the effective surface area of ​​the heat sink 3 in contact with the air can be increased, improving the uniformity of air distribution within the foam layer 32, increasing heat exchange efficiency, and preventing local overheating. This facilitates uniform heat dissipation, thereby improving the overall performance and lifespan consistency of the battery module.

[0035] Optionally, the heat sink 3 is covered with an insulating film 33. The insulating film 33 can be made of polyvinyl chloride (PVC), that is, a thin film made of polyvinyl chloride resin. Understandably, the insulating film 33 can also be made of materials such as polyimide and polyester resin (e.g., polyethylene terephthalate (PET)). The insulating film 33 can achieve electrical insulation, prevent short circuits between battery cell components, and improve the safety of the battery module.

[0036] In summary, the battery module of this invention improves heat dissipation performance through multiple irregularly shaped heat dissipation channels within the foam layer 32 of the heat dissipation plate 3. Furthermore, the inner surface of these heat dissipation channels has a certain degree of roughness, which improves heat exchange efficiency, prevents localized overheating of the battery module, and promotes uniform heat dissipation, thereby improving the overall performance and lifespan consistency of the battery module. In addition, electrical insulation is achieved by covering the heat dissipation plate 3 with an insulating film 33, thus enhancing the safety of the battery module.

[0037] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A battery module, characterized in that: The battery cell assembly includes a plurality of battery cells (1), and a heat sink (3) is sandwiched between every two adjacent battery cells (1). The heat sink (3) includes a main plate (31) and a foam layer (32). The main plate (31) is fitted over the foam layer (32), and the foam layer (32) is used to dissipate the heat generated by the battery cells (1).

2. The battery module according to claim 1, characterized in that: The foam layer (32) has multiple heat dissipation channels that penetrate the foam layer (32) along the width direction of the battery module. The cross-section of the heat dissipation channel is irregular in shape to increase the effective surface area of ​​the heat dissipation plate (3) in contact with the air.

3. The battery module according to claim 1, characterized in that: The heat sink (3) is covered with an insulating film (33).

4. The battery module according to claim 1, characterized in that: The outer periphery of the battery cell assembly is provided with a fastening component (2) for fixing the battery cell assembly.

5. The battery module according to claim 4, characterized in that: The fastening assembly (2) includes two end plates (21), which are respectively attached to the outer surface of the end cells at both ends of the cell assembly along its length direction. A fixing band (22) is wrapped around the two end plates (21) to fix the two end plates (21) and the cell assembly.

6. The battery module according to claim 5, characterized in that: The surface of the end plate (21) is provided with a limiting rib (211) to limit the relative position between the fixing strap (22) and the end plate (21).

7. The battery module according to claim 5, characterized in that: The end plate (21) is provided with a limiting groove for defining the relative position between the fixing strap (22) and the end plate (21), and a portion of the fixing strap (22) passes through the limiting groove.

8. The battery module according to claim 5, characterized in that: The end plate (21) is provided with a weight reduction groove (212) along the height direction of the battery module.

9. The battery module according to claim 8, characterized in that: The weight reduction groove (212) is provided with reinforcing ribs (213), which extend along the height direction of the battery module and are connected to the inner surface of the weight reduction groove (212) on opposite sides.

10. The battery module according to claim 9, characterized in that: The number of reinforcing ribs (213) is multiple, and the multiple reinforcing ribs (213) divide the weight-reducing groove (212) into multiple weight-reducing holes. The overlapping ends of every two adjacent reinforcing ribs (213) meet on the inner surface of the weight-reducing groove (212).

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