Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack. The battery module is internally provided with a module body and a module end plate, the module end plates are located on the four end faces of the module body. S-shaped grooves are formed in the sides, making contact with the module body, of the module end plates. And a heating wire for heating the module body is arranged in the S-shaped groove. The module end plates are made of 6-series aluminum profiles. The S-shaped groove is also filled with a heat-conducting structural adhesive; the heat-conducting structural adhesive is used for fixing the heating wire. And the upper plane of the S-shaped groove is filled with the heat-conducting structural adhesive. Any two adjacent module end plates are connected and fixed through a fixed connecting piece. According to the battery module, the heating area of the battery cell is effectively increased, so that an ideal heating effect is achieved. The module end plates are fixed and combined through bolts and surround the module body, so that the battery cells can be stabilized, and the heating effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, and in particular to a battery module and a battery pack. Background Art

[0002] In low-temperature environments, battery performance can be affected, such as reduced discharge capacity and incomplete charging. This is primarily due to poor electrolyte fluidity at low temperatures, which reduces internal battery efficiency and shortens battery life. Therefore, a stable and efficient cell heating solution is crucial for battery packs.

[0003] Currently, the most common method for heating battery cells is liquid cooling and liquid heating. Liquid heating uses heat transfer media such as pipes and thermal adhesives, but has low heat transfer efficiency. Furthermore, the liquid heating media is installed at the bottom of the battery cell, making it difficult to disassemble and repair. The heating surface of the battery cell is narrow, resulting in uneven heating. Furthermore, the need for a heater increases costs. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a battery module and a battery pack. The module end plates are provided to expand the heating area and improve the heating efficiency of the battery cells. At the same time, the module end plates surround the battery cells, making it easy to disassemble and repair.

[0005] In a first aspect, a battery module is provided. The battery module may be provided with: a module body and a module end plate; the module end plate is located at four end surfaces of the module body;

[0006] The module end plate is provided with an S-shaped groove on the contact side with the module body;

[0007] A heating wire for heating the module body is arranged in the S-shaped groove.

[0008] In an optional implementation, the module end plate is made of 6 series aluminum profile.

[0009] In an optional implementation, the S-shaped groove is further filled with a thermally conductive structural adhesive;

[0010] The heat-conducting structural adhesive is used to fix the heating wire.

[0011] In an optional implementation, the thermal conductive structural adhesive is filled to the upper plane of the S-shaped groove.

[0012] In an optional implementation, any two adjacent module end plates are connected and fixed via a fixed connector.

[0013] In an optional implementation, a protrusion hole is provided on the module end plate;

[0014] The end of the heating wire is connected to the external heating component through the extension hole.

[0015] In a second aspect, a battery pack is provided, which includes the battery module provided in the first aspect.

[0016] The device provided by the embodiment of the present utility model includes: a module body and a module end plate; the module end plate is provided with an S-shaped groove on the contact side of the module body, and a heating wire is provided in the S-shaped groove, which effectively increases the contact area between the heating wire and the module body, thereby improving the heating efficiency and better heating the module body; at the same time, a plurality of module end plates are connected and fixed with a unified fixing connector, which facilitates the disassembly of the module end plate and the maintenance and replacement of the module end plate. The present utility model uses a thermally conductive structural adhesive to fix the heating wire, which can not only better transfer the heat generated by the heating wire and improve the efficiency of heat transfer, but also insulate and improve safety. The module end plate of the present utility model uses a bolt fixing combination that surrounds the module body, which can both stabilize the battery cell and play a heating role. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram of a module end plate provided in an embodiment of the present utility model;

[0020] Figure 3 A schematic cross-sectional view of a module end plate provided in an embodiment of the present utility model;

[0021] In the figure: 1. Module body; 2. Module end plate; 3. Fixing hole; 4. Heating wire; 5. Extension hole; 6. S-shaped groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The preferred embodiments of the present invention are described below in conjunction with the drawings in the specification. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0024] Figure 1 A structural diagram of an embodiment of the present invention is provided, such as Figure 1 As shown, the battery module may include: a module body 1 and a module end plate 2 ; the module end plate 2 is located at the four end surfaces of the module body 1 .

[0025] In the embodiment of the present application, the module end plate 2 adopts 6 series aluminum profile. The end plate made of 6 series aluminum profile not only has high tensile strength and hardness, and can withstand various stresses that the battery pack may encounter during transportation and use, ensuring the stability of the structure, but also has good toughness, making it not easy to break when impacted, thereby improving the safety of the battery pack; furthermore, the thermal conductivity of 6 series aluminum profile is high, which helps to quickly transfer heat from the heating element to the battery, improve heating efficiency, and also helps to evenly dissipate heat from the battery during operation, avoid local overheating, and extend battery life.

[0026] Furthermore, a dense aluminum oxide film will naturally form on the surface of the 6-series aluminum profile. This film has good corrosion resistance and can prevent the erosion of moisture and chemicals in the environment to a certain extent. Its corrosion resistance and aesthetics can be further improved through surface treatment methods such as anodizing. The 6-series aluminum profile has good machinability and can be easily processed into the required shape and size through cutting, drilling, milling and other methods. It also has good welding performance and can be welded using methods such as TIG welding or MIG welding, which is convenient for assembly and maintenance. The 6-series aluminum profile can significantly reduce the overall weight of the battery pack and improve the energy efficiency and cruising range of the vehicle. Compared with some high-end alloy materials, the price of the 6-series aluminum profile is more economical and suitable for large-scale production. Due to its good corrosion resistance and easy machinability, the maintenance cost of the 6-series aluminum profile is relatively low.

[0027] In one embodiment of the present application, the module end plate 2 surrounds the module body 1, and the module end plates 2 of the four sections of the module body 1 can be formed as one piece; or four module end plates 2 can be set on the four end faces respectively, and any two adjacent module end plates 2 are connected and fixed by fixed connectors.

[0028] In the embodiment of the present application, when any two adjacent module end plates 2 are connected and fixed by a fixing connector, a fixing hole 3 is provided on the module end plate 2 so that the fixing connector can be fixed or passed through.

[0029] In one embodiment of the present application, the fixed connection member may be a thread and a bolt.

[0030] In the embodiment of the present application, the contact side of the template end plate 2 and the module body 1 is called the inner side of the module end plate 2; Figure 2 As shown, an S-shaped groove 6 is provided on the inner side of the module end plate 2 , and a heating wire 4 for heating the module body and a heat-conducting structural adhesive for fixing the heating wire are arranged in the S-shaped groove 6 .

[0031] In one embodiment of the present application, the heating wire 4 is first laid in the S-shaped groove 6, and then the thermal conductive structural adhesive is filled into the S-shaped groove 6 to fill the S-shaped groove 6; the plane where the S-shaped groove 6 contacts the module body 1 is called the upper plane of the S-shaped groove 6, and the thermal conductive structural adhesive needs to be filled until it is flush with the upper plane of the S-shaped groove 6, that is, the upper plane of the S-shaped groove 6 is flush with other position points on the inner side of the module end plate 2, so that the module body 1 and the module end plate 2 are tightly combined.

[0032] In the embodiment of the present application, laying the heating wire 4 within the S-shaped groove 6 can increase the contact area between the heating wire and the module body, thereby increasing the heating area of ​​the module body. The use of thermally conductive structural adhesive not only prevents short circuits and leakage, but also improves heat conduction, transferring the heat generated by the heating wire to the module body.

[0033] In another embodiment of the present application, the S-shaped groove 6 may also be a serpentine groove or a grid-shaped groove, so that the heating wire 4 is arranged in a serpentine or grid-shaped pattern on the module end plate 2 .

[0034] In the embodiment of the present application, an extension hole 5 is provided on the module end plate 2; the end of the heating wire 4 is connected to the external heating component or the external power supply through the extension control 5.

[0035] In one embodiment of the present application, the external heating component includes a temperature sensor and a heating controller; wherein the temperature sensor is used to monitor the real-time temperature of the module body 1; the heating controller is used to adjust the heating parameters of the heating wire 4 according to the real-time temperature of the module body 1 sensed by the temperature sensor, so as to automatically adjust the heating power according to the actual situation of the module body, avoid the problem of overheating or insufficient heating, and improve the heating efficiency.

[0036] In one embodiment of the present application, when the real-time temperature of the module body 1 monitored by the temperature sensor exceeds the warning threshold, the heating controller will directly cut off the power supply, thereby protecting the safety of the module body.

[0037] In other embodiments of the present application, a thermally conductive gasket or thermally conductive interface material may be provided between the module body 1 and the module end plate 2 to improve the heat conduction efficiency; specifically, the thermally conductive gasket may be a graphite sheet or thermally conductive silicone grease.

[0038] The working process is as follows: first, lay the heating wire in the S-shaped groove, and connect the end of the heating wire to the external heating component through the extension hole of the module end plate; then, pour thermal conductive structural glue into the S-shaped groove to fill the S-shaped groove, and then set the module end plate on the four sections of the module body, fix the module end plates between each other and between the module end plates and the module body, connect the external heating component to the power supply, and the module body can be heated.

[0039] This utility model allows the module end plates to fit tightly against the module body, while increasing the contact area between the heating wire and the module body, thereby improving heating efficiency and better heating the module body. At the same time, multiple module end plates are connected and fixed using a unified fixing member, making it easy to disassemble the module end plates for maintenance and replacement. This utility model uses thermally conductive structural adhesive to fix the heating wire, which not only better transfers the heat generated by the heating wire and improves the efficiency of heat transfer, but also provides insulation and improves safety.

[0040] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0041] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims and their equivalents, the embodiments of the present invention are intended to include these modifications and variations.

Claims

1. A battery module, characterized in that: The battery module is provided with: a module body and a module end plate; the module end plate is located at the four end faces of the module body; The module end plate is provided with an S-shaped groove on the contact side with the module body; A heating wire for heating the module body is arranged in the S-shaped groove.

2. The battery module according to claim 1, wherein: The module end plates are made of 6 series aluminum profiles.

3. The battery module according to claim 1, wherein: The S-shaped groove is also filled with thermal conductive structural adhesive; The heat-conducting structural adhesive is used to fix the heating wire.

4. The battery module according to claim 3, wherein: The thermal conductive structural adhesive is filled to the upper plane of the S-shaped groove.

5. The battery module according to claim 1, wherein: Any two adjacent module end plates are connected and fixed via a fixed connector.

6. The battery module according to claim 1, wherein: The module end plate is provided with a protruding hole; The end of the heating wire is connected to the external heating component through the extension hole.

7. A battery pack, characterized in that: The invention comprises a battery module according to any one of claims 1 to 6.

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