Battery module outer box

Abstract

The utility model discloses a battery module outer box which comprises a bottom plate, a plurality of partition plates are formed on the bottom plate at intervals, and a cavity capable of accommodating a battery module is formed between every two adjacent partition plates; the surface of the bottom plate and the side faces of the partition plates are concaved inwards to form a plurality of water tank structures, the water tank structures are arranged in the length direction of the bottom plate and arranged at intervals in the width direction of the bottom plate, and every two adjacent water tank structures communicate with each other through communicating grooves formed in the partition plates. The water tank structures are communicated end to end to form a backflow channel, and a cover plate is arranged on the bottom plate; the cover plate comprises a flat plate structure covering the surface of the bottom plate and a U-shaped plate structure covering the surface of the partition plate. The problems that in the prior art, the contact area of a battery shell, a battery and a water cooling plate is too small, so that the heat dissipation efficiency is poor, the water cooling plate is generally of an integrally-formed structure, and a water channel in the water cooling plate is prone to being blocked and not easy to clean after being used for a long time are solved.

Description

Battery module outer casing Technical Field

[0001] This utility model relates to the field of battery accessories, specifically to a battery module outer casing. Background Technology

[0002] In new energy battery pack systems, battery modules generate a large amount of heat during operation, requiring timely heat dissipation. Water cooling is an efficient heat dissipation method for the battery casing, utilizing the high thermal conductivity of water to rapidly transfer the heat generated by the battery to the water, which then quickly dissipates the heat, achieving rapid cooling. For example, Chinese patent CN207664114U provides a battery pack casing that meets the installation requirements of a water-cooled plate in a relatively compact battery pack casing. To achieve the above objectives, this utility model provides a battery pack casing, including an upper casing and a lower casing that overlap each other. The lower casing has a mounting cavity for installing battery modules. The bottom plate of the lower casing is a water-cooled plate with cooling channels, forming the bottom surface of the mounting cavity. At least one set of mounting holes is provided at both ends of the bottom plate, and each end of the battery module is connected to one of the mounting holes at its respective end. In the battery casings of the prior art, only the bottom of the battery contacts the water-cooling plate. The contact area between the battery and the water-cooling plate is too small, resulting in poor heat dissipation efficiency. Furthermore, the water-cooling plate is generally a one-piece molded structure, and its internal water channels are prone to clogging after long-term use, making them difficult to clean. Summary of the Invention

[0003] The purpose of this utility model is to provide a battery module outer casing that solves the problems of existing battery casings where only the bottom of the battery contacts the water-cooling plate, resulting in a small contact area between the battery and the water-cooling plate, leading to poor heat dissipation efficiency. Furthermore, the water-cooling plate is generally a one-piece molded structure, and its internal water channels are prone to clogging and are difficult to clean after long-term use.

[0004] To achieve the above objectives, this utility model provides a battery module outer casing, which includes a bottom plate, on which a plurality of partitions are formed at intervals, and a cavity capable of accommodating the battery module is formed between two adjacent partitions.

[0005] The surface of the base plate and the side of the partition plate are concave inward to form multiple water tank structures. The water tank structures are arranged along the length direction of the base plate, and the multiple water tank structures are spaced apart along the width direction of the base plate. Two adjacent water tank structures are connected by a connecting groove provided on the partition plate, so that the multiple water tank structures are connected end to end to form a return channel. A cover plate is provided on the base plate.

[0006] The cover plate includes a flat plate structure covering the surface of the base plate and a U-shaped plate structure covering the surface of the partition plate.

[0007] Preferably, the partitions located on both sides of the bottom plate are respectively provided with water inlet heads and water outlet heads;

[0008] The inlet head and the outlet head are respectively connected to the two ends of the return channel.

[0009] Preferably, a first waterproof gasket is provided at the contact point between the flat plate structure and the surface of the base plate;

[0010] A second waterproof gasket is provided at the contact point between the U-shaped plate structure and the surface of the partition.

[0011] Preferably, the cover plate is fastened to the partition plate by a screw assembly.

[0012] Preferably, a baffle is fixed on one side of the base plate, and a movable baffle is detachably provided on the other side.

[0013] Preferably, an elastic plate is provided on the inner side of the baffle.

[0014] Beneficial Effects: This utility model provides a battery module outer casing, which includes a base plate with multiple partitions spaced apart on the base plate. A cavity capable of accommodating the battery module is formed between two adjacent partitions. Multiple water trough structures are formed concavely on the surface of the base plate and the sides of the partitions. The water trough structures are arranged along the length direction of the base plate, and the multiple water trough structures are spaced apart along the width direction of the base plate. Two adjacent water trough structures are connected by a connecting groove on the partition, so that the multiple water trough structures are interconnected end to end to form a return channel. A cover plate is provided on the base plate. The cover plate includes a flat plate structure covering the surface of the base plate and a U-shaped plate structure covering the surface of the partitions. During use, the battery module is installed in the cavity between the separators, allowing the bottom of the battery to fit against the surface of the flat structure and the sides of the battery to fit against the U-shaped plate structure. Cooling water can flow in the water tank structure, thereby carrying away the heat from the battery surface. This structure greatly increases the water cooling heat dissipation area of ​​the battery surface and improves the heat dissipation efficiency. At the same time, the cover is easy to install and remove, making it easy to clean the internal water tank structure and avoid clogging.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 is a structural diagram of the outer casing of the battery module provided by this utility model;

[0018] Figure 2 is a structural diagram of the baffle in the outer casing of the battery module provided by this utility model;

[0019] Figure 3 is an exploded view of the outer casing of the battery module provided by this utility model;

[0020] Figure 4 is an enlarged view of part A in Figure 3;

[0021] Figure 5 is a schematic diagram of the water flow direction inside the water tank structure.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Base plate; 2-Baffle plate; 3-Water tank structure; 4-Flat plate structure; 5-U-shaped plate structure; 6-Water inlet; 7-Water outlet; 8-Connecting groove; 9-Baffle plate; 10-Elastic plate; 11-Modible baffle plate; 12-Battery module. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0025] As shown in Figures 1-5: This utility model provides a battery module outer casing, which includes a base plate 1. Multiple partitions 2 are spaced apart on the base plate 1, and a cavity capable of accommodating a battery module 12 is formed between adjacent partitions 2. Multiple water trough structures 3 are formed concavely inward on the surface of the base plate 1 and the sides of the partitions 2. The water trough structures 3 are arranged along the length of the base plate 1, and the multiple water trough structures 3 are spaced apart along the width of the base plate 1. Adjacent water trough structures 3 are connected by a connecting groove 8 on the partitions 2, allowing the multiple water trough structures 3 to be interconnected end-to-end to form a return flow channel. A cover plate is provided on the base plate 1. The cover plate includes a flat plate structure 4 covering the surface of the base plate 1 and a U-shaped plate structure 5 covering the surface of the partitions 2. During use, the battery module is installed in the cavity between the separators, allowing the bottom of the battery to fit against the surface of the flat structure and the sides of the battery to fit against the U-shaped plate structure. Cooling water can flow in the water tank structure, as shown by arrow B in Figure 5, thereby carrying away the heat from the battery surface. This structure greatly increases the water cooling heat dissipation area of ​​the battery surface and improves the heat dissipation efficiency. At the same time, the cover is easy to install and remove, making it easy to clean the internal water tank structure and avoid clogging.

[0026] In a preferred embodiment of this utility model, in order to facilitate the connection between the water tank structure and the cooling water circulation assembly, the partition plates 2 located on both sides of the bottom plate 1 are respectively provided with water inlet head 6 and water outlet head 7.

[0027] The inlet head 6 and the outlet head 7 are respectively connected to both ends of the return channel.

[0028] In a preferred embodiment of the present invention, in order to increase the sealing performance between the cover plate and the bottom plate and the partition, a first waterproof gasket is provided at the contact point between the flat plate structure 4 and the surface of the bottom plate 1.

[0029] A second waterproof gasket is provided at the contact point between the U-shaped plate structure 5 and the surface of the partition 2.

[0030] In a preferred embodiment of this utility model, in order to facilitate the installation and disassembly of the cover plate, the cover plate is fastened to the partition plate 2 by a screw assembly.

[0031] In a preferred embodiment of this utility model, in order to facilitate the installation and disassembly of the internal battery module, a baffle 9 is fixed on one side of the base plate 1, and a movable baffle 11 is detachably provided on the other side.

[0032] In a preferred embodiment of this utility model, in order to facilitate the effective locking of the battery module between the baffle and the movable baffle and prevent it from loosening, an elastic plate 10 is provided on the inner side of the baffle 9. The surface of the elastic plate is U-shaped, which allows it to press the battery module firmly onto the movable baffle.

[0033] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0034] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0035] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A battery module outer casing, characterized in that, The outer casing of the battery module includes a base plate (1), on which a plurality of partitions (2) are formed at intervals, and a cavity is formed between two adjacent partitions (2) to accommodate the battery module (12); The surface of the base plate (1) and the side of the partition plate (2) are concave inward to form a plurality of water tank structures (3). The water tank structures (3) are arranged along the length direction of the base plate (1), and the plurality of water tank structures (3) are spaced apart along the width direction of the base plate (1). Two adjacent water tank structures (3) are connected by a connecting groove (8) provided on the partition plate (2), so that the plurality of water tank structures (3) are connected end to end to form a return channel. A cover plate is provided on the base plate (1). The cover plate includes a flat plate structure (4) covering the surface of the base plate (1) and a U-shaped plate structure (5) covering the surface of the partition plate (2).

2. The battery module outer casing according to claim 1, characterized in that, The partitions (2) located on both sides of the base plate (1) are respectively provided with water inlet head (6) and water outlet head (7); the water inlet head (6) and the water outlet head (7) are respectively connected to the two ends of the return channel.

3. The battery module outer casing according to claim 2, characterized in that, A first waterproof gasket is provided at the contact point between the flat plate structure (4) and the surface of the base plate (1); a second waterproof gasket is provided at the contact point between the U-shaped plate structure (5) and the surface of the partition plate (2).

4. The battery module outer casing according to claim 3, characterized in that, The cover plate is fastened to the partition (2) by a screw assembly.

5. The battery module outer casing according to claim 4, characterized in that, A baffle (9) is fixed on one side of the base plate (1), and a movable baffle (11) is detachably provided on the other side.

6. The battery module outer casing according to claim 5, characterized in that, An elastic plate (10) is provided on the inner side of the baffle (9).

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