Battery module heat dissipation structure

Abstract

The utility model discloses a heat dissipation structure of a battery module, which belongs to the technical field of batteries and comprises at least more than two single batteries arranged side by side, each single battery is provided with a pole, and a fin aluminum row is welded on the poles of two adjacent single batteries and is used for connecting a plurality of single batteries in series; the fin aluminum row is made of an aluminum alloy material and comprises an aluminum row and fins which are integrally formed with the aluminum row and are used for heat dissipation; a heat dissipation aluminum plate is clamped between every two adjacent single batteries, and each heat dissipation aluminum plate is provided with a channel penetrating through the two ends of the heat dissipation aluminum plate, so that air can circulate in the heat dissipation aluminum plate; and a plurality of packing belts are bound outside all the single batteries. According to the utility model, heat generated during high-rate charging and discharging of the battery can be quickly conducted out through the side wall and the pole of the battery, so that the working efficiency of the battery is not influenced, and the safety can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a heat dissipation structure of a battery module. Background Art

[0002] With the development of the new energy industry, various batteries developed to meet various needs have different usage characteristics. In many cases, when the battery is charged and discharged at a high rate, a large amount of heat will be generated, causing the battery to heat up. High temperature will significantly reduce the cycle life of the battery, and may even cause malfunctions that damage the battery or fire that endangers personal safety. Therefore, the temperature rise of the battery under high-rate charge and discharge has always been a difficult problem to solve.

[0003] In existing technologies, such as the invention patent with authorization announcement number CN117293446B, "A Battery Module Cooling Structure and Battery Module," this technology uses a copper busbar installed on the battery pole, a cooling jacket installed on the copper busbar, and a liquid inlet and outlet on the cooling jacket. The cooling jacket has a cooling liquid chamber, and coolant is injected into the cooling liquid chamber through the liquid inlet. The battery pole passes through the copper busbar and is covered by a heat-conducting cover connected to the cooling jacket. The heat-conducting cover is filled with heat-conducting gel. The heat emitted from the battery pole is transferred to the cooling jacket through the heat-conducting gel and the heat-conducting cover. The temperature is then reduced by the coolant in the cooling jacket. Although this method can solve the problem of battery temperature rise to a certain extent, the operation is relatively cumbersome. For example, the coolant may need to be added or replaced regularly, the amount of coolant added must be measured, and the coolant must be ensured to prevent leakage. In addition, this technology only reduces the temperature by dissipating the heat emitted from the battery pole. However, during high-rate charge and discharge, the side walls of the battery are also prone to generating a large amount of heat. Therefore, designing a more efficient battery heat dissipation structure is particularly important. Summary of the Invention

[0004] The purpose of the utility model is to provide a device that can quickly conduct the heat generated by the battery during high-rate charge and discharge through the side walls and poles of the battery, which does not affect the working efficiency of the battery and improves safety.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is to provide a battery module heat dissipation structure, comprising at least two or more single cells arranged side by side, poles being provided on the single cells, and finned aluminum bars being welded on the poles of two adjacent single cells for connecting the multiple single cells in series; the finned aluminum bars are made of aluminum alloy, comprising an aluminum bar and fins for heat dissipation integrally formed with the aluminum bar; a heat dissipation aluminum plate is sandwiched between two adjacent single cells, the heat dissipation aluminum plate being provided with channels running through both ends thereof for air to circulate in the heat dissipation aluminum plate; and a plurality of strapping tapes are bundled around the outside of all the single cells.

[0006] As a further improvement of the present invention, the single cells at both ends of the battery module are connected with output aluminum bars for current input and output; the ends of the output aluminum bars can be bolted to the plastic mold parts for connecting the wires to the battery module.

[0007] As a further improvement of the present invention, end PC films are adhered to the outer sides of the single cells at both ends of the battery module to insulate the sides of the battery module.

[0008] As a further improvement of the present invention, end plates are provided at both ends of the battery module, between the end PC films and the strapping tape.

[0009] As a further improvement of the present invention, a buffer pad is adhered to the side of the end plate close to the end PC film.

[0010] As a further improvement of the present invention, a bottom PC film is provided at the bottom of the battery module to insulate the bottom surface of the battery module.

[0011] As a further improvement of the present invention, insulating material is adhered to the surface of the single battery.

[0012] As a further improvement of the present invention, the upper end of the heat dissipation aluminum plate is flush with the shoulder of the single battery, and its surface is covered with insulating material. The outer surface of the insulating material is coated with structural adhesive for adhesive connection with the single battery.

[0013] Compared with the existing technology, the battery module heat dissipation structure provided by the present invention utilizes aluminum fins connected to the battery poles and heat dissipation aluminum plates sandwiched between the batteries to quickly conduct the heat generated during high-rate charge and discharge of the batteries through the battery side walls and poles, thereby achieving the purpose of rapid heat dissipation and being more efficient and safe. In short, the present invention can quickly conduct the heat generated during high-rate charge and discharge of the batteries through the battery side walls and poles, without affecting the operating efficiency of the batteries and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the appearance diagram of the heat dissipation structure of the battery module of the utility model;

[0015] Figure 2 This is an exploded schematic diagram of the heat dissipation structure of the battery module of the present invention.

[0016] Explanation of the accompanying numbers: 1 is a single battery, 11 is a pole, 2 is a finned aluminum bar, 3 is a heat dissipation aluminum plate, 4 is a strapping tape, 5 is an output aluminum bar, 6 is an end PC film, 7 is an end plate, 8 is a buffer pad, 9 is a bottom PC film, and 10 is a plastic mold part. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying 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.

[0018] like Figures 1 to 2 As shown, the utility model provides a battery module heat dissipation structure, comprising at least two or more single cells 1 arranged side by side, each single cell 1 being provided with two poles 11, and finned aluminum bars 2 being welded to the poles 11 of two adjacent single cells 1 for connecting the multiple single cells 1 in series; the finned aluminum bars 2 are made of aluminum alloy, comprising an aluminum bar and fins for heat dissipation integrally formed with the aluminum bar; a heat dissipation aluminum plate 3 is sandwiched between two adjacent single cells 1, the heat dissipation aluminum plate 3 being provided with channels running through both ends thereof for air to circulate in the heat dissipation aluminum plate 3; a plurality of strapping tapes 4 are bundled around all the single cells 1.

[0019] In the above technical solution, when the battery module is charging or discharging, the heat generated inside the single cell 1 diffuses to the pole 11 and side walls of the single cell 1. The pole 11 is particularly subjected to a huge amount of heat output. At this time, the finned aluminum bar 2 welded to the pole 11 can quickly conduct the heat output from the pole 11, and then use the fins to increase the heat dissipation area, quickly and effectively dissipating the heat. The heat dissipation aluminum plate 3 sandwiched between the single cells 1 can conduct the heat generated by the side walls of the single cell 1 and then dissipate the heat through the channels of the heat dissipation aluminum plate 3. Several strapping tapes 4 are tied around all the single cells 1 to ensure the structural stability of the battery module and minimize the impact on the air flow through the channels of the heat dissipation aluminum plate 3. The advantage of this utility model is that it does not affect the operating efficiency of the battery while improving safety.

[0020] Further, such as Figure 1 As shown, the single cells 1 at both ends of the battery module are connected to output aluminum bars 5, and the ends of the output aluminum bars 5 can be bolted to the plastic mold parts 10 for connecting the wires to the battery module.

[0021] Further, such as Figure 1 As shown, the surface of the single battery 1 is pasted with insulating material, which can be applied with an insulating coating and then pasted with a blue film, which can better insulate and prevent the battery module from accidentally conducting electricity during operation and inducing unsafe factors.

[0022] Further, such as Figure 1 and Figure 2As shown, end PC films 6 are adhered to the outer sides of the single cells 1 at both ends of the battery module, and a bottom PC film 9 is provided at the bottom of the battery module to provide insulation protection for the side and bottom surfaces of the battery module, thereby further increasing the safety of the battery module.

[0023] Further, such as Figure 1 and Figure 2 As shown, end plates 7 are provided between the end PC film 6 and the strapping tape 4 at both ends of the battery module, and a buffer pad 8 is adhered to the side of the end plate 7 close to the end PC film 6. The end plate 7 can be provided with channels running through the upper and lower ends thereof, which is beneficial to heat dissipation at the ends of the battery module. The end plate 7 can also disperse the binding pressure of the strapping tape 4 on the single battery 1 at the ends of the battery module.

[0024] In a preferred embodiment, the material of the finned aluminum bar 2 and the heat dissipating aluminum plate 3 is aluminum alloy, or copper or copper alloy, but aluminum alloy is cheaper. The finned aluminum bar 2 only needs to meet the overcurrent requirement while reducing the temperature rise of the battery module during charging and discharging, and the heat dissipating aluminum bar 3 only needs to meet the requirement of rapid heat conduction and heat dissipation.

[0025] In short, the utility model can quickly conduct the heat generated by the battery during high-rate charge and discharge through the side walls and poles of the battery, which does not affect the working efficiency of the battery and improves safety.

[0026] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A battery module heat dissipation structure, comprising at least two or more single batteries (1) arranged side by side, wherein a pole (11) is provided on each of the single batteries (1), characterized in that: A finned aluminum bar (2) is welded on the poles (11) of two adjacent single cells (1) to connect a plurality of the single cells (1) in series; the finned aluminum bar (2) is made of an aluminum alloy and comprises an aluminum bar and fins for heat dissipation integrally formed with the aluminum bar; a heat dissipation aluminum plate (3) is sandwiched between the two adjacent single cells (1); the heat dissipation aluminum plate (3) is provided with channels running through both ends thereof to allow air to circulate within the heat dissipation aluminum plate (3); and a plurality of strapping tapes (4) are bundled around the outside of all the single cells (1).

2. The battery module heat dissipation structure according to claim 1, characterized in that: The single cells (1) at both ends of the battery module are connected to output aluminum bars (5) for current input and output; the ends of the output aluminum bars (5) can be bolted to plastic mold openings (10) for connecting wires to the battery module.

3. The battery module heat dissipation structure according to claim 1, characterized in that: End PC films (6) are adhered to the outer sides of the single cells (1) at both ends of the battery module to insulate the sides of the battery module.

4. The battery module heat dissipation structure according to claim 3, characterized in that: End plates (7) are provided at both ends of the battery module, between the end PC films (6) and the packing tape (4).

5. The battery module heat dissipation structure according to claim 4, characterized in that: A buffer pad (8) is adhered to one side of the end plate (7) close to the end PC film (6).

6. The battery module heat dissipation structure according to claim 5, characterized in that: A bottom PC film (9) is provided at the bottom of the battery module for insulating the bottom surface of the battery module.

7. The battery module heat dissipation structure according to claim 6, characterized in that: Insulating material is pasted on the surface of the single battery (1).

8. The battery module heat dissipation structure according to claim 7, characterized in that: The upper end of the heat dissipation aluminum plate (3) is flush with the shoulder of the single battery (1), and its surface is covered with an insulating material. The outer surface of the insulating material is coated with structural adhesive for adhesive connection with the single battery (1).

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