Double-layer cooling battery pack structure

Abstract

The utility model discloses a double-layer cooling battery pack structure. The double-layer cooling battery pack structure comprises a battery cell module, a frame, a longitudinal beam, a cross beam, an upper-layer cooling plate and a lower-layer cooling plate, the upper and lower surfaces of the battery cell module are planes, and exhaust holes are formed in the side surfaces of the battery cell module; the frame is of a hollow structure, a communicated cavity is formed in the frame, a gas collecting groove is formed in the inner side of the frame, and a gas release port and an anti-explosion valve connected with the gas release port are arranged on the outer side of the frame. And the cross beams, the longitudinal beams and the frame form a plurality of spaces for accommodating battery cell modules. The upper-layer cooling plate is arranged on the upper surface of the battery cell module; and the lower-layer cooling plate is arranged on the lower surface of the battery cell module. A double-face cooling mode is adopted, heat dissipation efficiency is improved, and development cost is saved; and a special exhaust channel is constructed to guide high-temperature flue gas to avoid a high-pressure area, so that arc discharge and other phenomena are avoided, and the flue gas is smoothly guided to be discharged out of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle battery technology, specifically a double-layer cooling battery pack structure. Background Technology

[0002] Currently, major OEMs in the electric vehicle industry are pursuing high-energy-density battery packs with high-power charging capabilities. However, due to the significant heat generated by fast-charging batteries, traditional single-sided cooling plates are no longer sufficient to meet current charging power requirements. Furthermore, with the increasing energy density of battery cells, the upward-facing design of the battery vent valve presents significant challenges for thermal protection of the top cover, making it difficult to resolve the battery heat dissipation problem. Currently, the upper surface of the prismatic battery cell module structure consists of copper busbars and FPCs. Increasing the heat dissipation area of ​​the cell module requires modifications to the overall pack structure or battery layout, which are substantial and not conducive to compatibility with existing vehicle models. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0004] A dual-layer cooling battery pack structure includes: a cell module, a frame, longitudinal beams, cross beams, an upper cooling plate, and a lower cooling plate.

[0005] The upper and lower surfaces of the battery cell module are both flat, and the sides are provided with vent holes; the frame is a hollow structure, forming a connected cavity inside, with an air collection groove on the inner side and an air vent and an explosion-proof valve connected to the air vent on the outer side.

[0006] The two ends of the longitudinal beam are fixedly connected to the inner side of the frame; one end of the crossbeam is fixedly connected to the inner side of the frame, and the other end is fixedly connected to the longitudinal beam. The crossbeam, the longitudinal beam, and the frame form multiple spaces for accommodating the battery cell module.

[0007] The upper cooling plate is located on the upper surface of the battery cell module; the lower cooling plate is located on the lower surface of the battery cell module.

[0008] Furthermore, both the upper cooling plate and the lower cooling plate are water-cooled plates.

[0009] Furthermore, the upper cooling plate and the lower cooling plate are connected to the upper and lower surfaces of the battery cell module respectively by thermally conductive adhesive, thermally conductive pads or structural adhesive.

[0010] Furthermore, both the upper cooling plate and the lower cooling plate are equipped with quick-connect connectors.

[0011] Furthermore, the vent is located on the side of the battery cell module near the frame and the crossbeam.

[0012] Furthermore, the vent hole is a round hole, a square hole, or an oblong hole.

[0013] Furthermore, the battery pack structure also includes a battery management module and connectors.

[0014] Furthermore, fireproof cloth or fireproof board is filled between the battery cell module and the frame beam, and between the battery cell module and the crossbeam.

[0015] This invention arranges an upper cooling plate and a lower cooling plate on the upper and lower surfaces of the battery cell module, which can improve thermal management capabilities with minimal changes to the existing mature overall pack structure and save development costs. The battery cell module has an exhaust port, and an inlet groove and an outlet are provided on the frame, so that gas can be discharged to the outside of the battery through the exhaust channel in the frame during heat diffusion, which provides heat dissipation capacity for the battery pack, avoids arcing and other phenomena, and smoothly guides the smoke to be discharged from the battery pack. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment;

[0017] Figure 2 This is a schematic diagram of the assembled embodiment;

[0018] Figure 3 This is a schematic diagram of the battery cell module;

[0019] Figure 4 This is a schematic diagram of the border;

[0020] Explanation of key component symbols:

[0021] 1-Battery cell module, 11-Exhaust vent, 2-Frame, 21-Gas collection groove, 22-Vent port, 23-Explosion-proof valve, 3-Longitudinal beam, 4-Crossbeam, 5-Upper cooling plate, 6-Lower cooling plate, 7-Battery management module, 8-Connector, 9-Quick connector. Detailed Implementation

[0022] To clearly describe this utility model, it will now be described in further detail with reference to the accompanying drawings.

[0023] like Figure 1-4 As shown, a dual-layer cooling battery pack structure includes: a cell module 1, a frame 2, a longitudinal beam 3, a transverse beam 4, an upper cooling plate 5, and a lower cooling plate 6.

[0024] The upper and lower surfaces of the battery cell module 1 are both flat, and its side has an exhaust port 11. The frame 2 has a hollow structure, forming an exhaust channel inside. Its inner side has a gas collection groove 21, and its outer side has a vent 22 and an explosion-proof valve 23 connected to the vent 22. The internal cavity of the frame 2 forms a heat diffusion exhaust channel, which allows gas to be smoothly discharged when the battery undergoes heat diffusion. Explosion-proof valves 23 are placed at the front and rear of the battery pack to guide the discharge of heat diffusion gas. The explosion-proof valves 23 can also be installed on the side of the frame 2.

[0025] The two ends of the longitudinal beam 3 are fixedly connected to the inner side of the frame 2; one end of the crossbeam 4 is fixedly connected to the inner side of the frame 2, and the other end is fixedly connected to the longitudinal beam 3. The crossbeam 4, the longitudinal beam 3 and the frame 2 form multiple spaces for accommodating the battery cell module 1.

[0026] The upper cooling plate 5 is disposed on the upper surface of the battery cell module 1; the lower cooling plate 6 is disposed on the lower surface of the battery cell module 1.

[0027] Both the upper cooling plate 5 and the lower cooling plate 6 are water-cooled plates.

[0028] The upper and lower surfaces of the battery cell module 1 need to be designed with a relatively flat structure. The upper cooling plate 5 and the lower cooling plate 6 are connected to the upper and lower surfaces of the battery cell module 1 respectively by thermally conductive adhesive, thermally conductive pad or structural adhesive to achieve good heat dissipation.

[0029] Both the upper cooling plate 5 and the lower cooling plate 6 are equipped with quick-connect connectors 9, which are connected to the vehicle through the quick-connect connectors 9.

[0030] The vent 11 is located on the side of the cell module 1 near the frame 2 and the crossbeam 4. The high-voltage area near the longitudinal beam 3 does not have a vent 11, and a vent groove is designed in the side beam area near the outer side of the battery pack, so that the gas from the cell heat diffusion can be discharged from the battery pack through the cavity of the side beam.

[0031] The exhaust port 11 is a round hole, a square hole, or an oblong hole.

[0032] The battery pack structure also includes a battery management module 7 and a connector 8.

[0033] Fireproof cloth or fireproof board is filled between the battery cell module 1 and the frame beam 2 and between the battery cell module 1 and the crossbeam 4 to prevent heat diffusion and high-temperature smoke from damaging other components.

[0034] This utility model's battery pack structure can be used with different types of batteries, such as pouch batteries and blade batteries. It employs a double-sided cooling method to improve heat dissipation efficiency, achieving enhanced thermal management capabilities with minimal modifications to existing mature battery pack structures, thus saving development costs. The cell module 1 has an exhaust port 11, and the frame 2 has an inlet groove and an exhaust port 22, creating a dedicated exhaust channel to guide high-temperature flue gas away from high-pressure areas, preventing arcing and other phenomena, and smoothly guiding the flue gas out of the battery pack.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0036] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and simplify 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 limiting the scope of protection of this utility model.

Claims

1. A double-layer cooling battery pack structure, characterized in that, include: The battery cell module (1) has flat surfaces on both the upper and lower surfaces, and exhaust holes (11) are provided on its side. The frame (2) is a hollow structure with an exhaust channel inside. It has an air collection groove (21) on its inner side and an air vent (22) and an explosion-proof valve (23) connected to the air vent (22) on its outer side. The longitudinal beam (3) is fixedly connected to the inner side of the frame (2) at both ends; The crossbeam (4) is fixedly connected at one end to the inner side of the frame (2) and at the other end to the longitudinal beam (3). The crossbeam (4), the longitudinal beam (3) and the frame (2) form multiple spaces for accommodating the battery cell module (1). The upper cooling plate (5) is provided on the upper surface of the battery cell module (1); as well as The lower cooling plate (6) is provided on the lower surface of the battery cell module (1).

2. The dual-layer cooling battery pack structure according to claim 1, characterized in that: Both the upper cooling plate (5) and the lower cooling plate (6) are water-cooled plates.

3. The dual-layer cooling battery pack structure according to claim 2, characterized in that: The upper cooling plate (5) and the lower cooling plate (6) are connected to the upper and lower surfaces of the battery cell module (1) respectively by thermally conductive adhesive, thermally conductive pad or structural adhesive.

4. The dual-layer cooling battery pack structure according to claim 3, characterized in that: Both the upper cooling plate (5) and the lower cooling plate (6) are equipped with quick-connect connectors (9).

5. The dual-layer cooling battery pack structure according to claim 1, characterized in that: The vent (11) is located on the side of the cell module (1) near the frame (2) and the crossbeam (4).

6. The dual-layer cooling battery pack structure according to claim 5, characterized in that: The vent (11) is a round hole, a square hole, or an oblong hole.

7. The dual-layer cooling battery pack structure according to claim 1, characterized in that: The battery pack structure also includes a battery management module (7) and a connector (8).

8. The dual-layer cooling battery pack structure according to any one of claims 1-7, characterized in that: Fireproof cloth or fireproof board is filled between the battery cell module (1) and the frame beam (2) and between the battery cell module (1) and the crossbeam (4).

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