Patent Application
20240274950
The present disclosure relates to the field of battery technology, for example, to a support, a housing and a pouch battery module.
In related art, the traveling range of electric vehicles is getting longer. The industry is now pursuing how to improve the energy density of battery packs. Through module-free design for battery pack, it is possible to increase the energy density by about 30%. In the meantime, such design may considerably reduce electrical connectors, thereby reducing the energy loss in the battery pack and cost.
The housing of battery pack is generally composed of front and rear covers, left and right side panels, and upper and lower cover plates. The assembly is cumbersome and troublesome. In addition, battery cells or battery cell stacks are placed in the housing, and the size of the battery stacking direction is generally between 500 mm and 800 mm. The number of stacked battery cells is between 60 and 100, and since the stacked battery cells are not supported on the inside, which makes the overall rigidity of the battery pack poor, and the battery cells therein are easily deformed by force, which affects the performance of the battery pack.
The present disclosure provides a support, which may be applied to the housing of a battery, save the upper and lower cover plates, facilitates assembly, and provide support for the inside of the housing to improve the rigidity of the housing.
The present disclosure further provides a housing. By applying the above support, the overall rigidity is good, so the housing is not easily deformed, and is easy to assemble.
The present disclosure further provides a pouch battery module, which has good overall rigidity and stable performance by integrating the above housing.
An embodiment provides a support, the cross-section of the support is I-shaped, and the support includes: an upper flat part configured to be used as an upper cover plate for a housing of a battery; a lower flat part arranged in parallel with the upper flat part, the lower flat part is configured to be used as a lower cover plate of the housing of the battery; and a connecting part, the two ends of which are fixedly connected to the upper flat part and the lower flat part respectively.
An embodiment provides a housing, which includes a left side panel, a right side panel, a front cover, a rear cover and the above-mentioned support. The left side panel is welded to the first side of the support and forms a first accommodation cavity with the support. The second side plate is welded to the right side of the support and forms a second accommodation cavity with the support. The front cover and the rear cover are respectively welded to the front and rear ends of the support, and the first side of the support is opposite to the second side of the support.
An embodiment provides a pouch battery module, which includes a battery cell and the housing as described above. The first accommodation cavity and the second accommodation cavity are respectively provided with the battery cell, and the battery cell is a single cell or the battery cell is a cell stack.
In the description of the present disclosure, it should be noted that the terms “upper”. “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, etc. indicate directions or the positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the product of the disclosure is generally placed in use, and is only for ease of describing the disclosure and simplifying the description, rather than indicating or implying that the mentioned device or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as a limitation to the disclosure. In addition, the terms “first”, “second”, etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance. In the description of the present disclosure, unless otherwise specified, “plurality” means two or more.
In the description of the present disclosure, it should be further indicated that, unless otherwise clearly specified and limited, the terms “disposed” and “connected” should be understood in a broad sense, for example, the above terms may refer to a fixed connection, a detachable connection, or integral formation; mechanical or electrical connection. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure in specific situations.
In the present disclosure, unless otherwise clearly specified and limited, a first feature being “on” or “below” a second feature may indicate direct contact between the first and second features, and may also indicate that the first and second features are not in direct contact but are in indirect contact through another feature between them. Moreover, the first feature being “above”, “over” and “on” the second feature indicates that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is at a level higher than the second feature. The first feature being “below”, “beneath” and “under” the second feature indicates that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a level lower than the second feature.
As shown in
In an embodiment, the support 1 is an integrally formed structure. In other embodiments, the support 1 may also be formed by two “C” shaped supports fixedly connected to each other. In other embodiments, the support 1 may further be made in other forms, as long as the upper and lower cover plates of the housing are omitted and support can be provided for the interior of the housing, no further examples will be given here.
In an embodiment, the upper flat part 11 is penetrated by a coolant channel 14 along the length direction thereof. The lower flat part 12 is penetrated by the coolant channel 14 along the length direction thereof. The connecting part 13 is penetrated by the coolant channel 14 along the length direction thereof.
In an embodiment, the support 1 may be formed by extrusion, and the coolant channel 14 may be formed at the same time.
This embodiment provides a housing, which includes the support 1 described in Embodiment 1.
As shown in
The left side panel 2 is welded at the first side of the support 1 and forms a first accommodation cavity with the support 1, and the right side panel 3 is welded at the second side of the support 1 and forms a second accommodation cavity with the support 1. The first side of the support 1 and the second side of the support 1 are opposite to each other. The front cover 4 and the rear cover 5 are respectively welded at the two ends of the support 1, thereby forming a housing-like structure with four sides sealed.
In an embodiment, the front cover 4 is provided with an explosion-proof valve 9; the rear cover 5 is provided with an explosion-proof valve 9. When the battery cell is undergoing thermal runaway, the high-temperature gas may be ejected toward a fixed direction to improve the explosion-proof performance of the housing.
In an embodiment, as shown in
In an embodiment, as shown in
As shown in
As shown in
In an embodiment, the front connecting frame 6 is an insulator. Similarly, the rear connecting frame 7 is an insulator.
In order to facilitate the fixed connection between the front connecting frame 6 and the support 1. One of the front connecting frame 6 and the support 1 is provided with a front protrusion 15, and the other is provided with a front engaging slot 61 which is engaged with the front protrusion 15, so that the front connecting frame 6 may be engaged at the front end of the support 1.
Exemplarily, the front protrusion 15 is set on the support 1. Specifically, the front protrusion 15 may be set on the upper flat part 11 and the lower flat part 12. The front connecting frame 6 is opened with a front engaging slot 61, and the front engaging slot 61 may be engaged on the front protrusion 15, thus realizing positioning and connection between the front connecting frame 6 and the support 1.
In order to facilitate the positioning and connection between the front cover 4 and the front connecting frame 6, the front cover 4 is opened with the front positioning slot 41. A front positioning block is provided on the front connecting frame 6, and the front positioning block may be engaged in the front positioning slot 41, thereby realizing the positioning of the front cover 4, so as to prevent dislocation of the front cover 4 during the welding process and to ensure welding accuracy and quality.
In this embodiment, as shown in
In order to facilitate the positioning and connection between the rear connecting frame 7 and the support 1, as shown in
In an embodiment, the rear connecting frame 7 is provided with the rear engaging slot 711. Two rear engaging slots 711 are vertically spaced apart on the rear connecting frame 7, and the upper flat part 11 and the lower flat part 12 of the support 1 are provided with the rear protrusion 16. By engaging the rear engaging slot 711 on the rear protrusion 16 of the support 1, it is possible to realize the positioning and fixed connection between the rear connecting frame 7 and the support 1.
In order to facilitate the positioning and connection between the rear cover 5 and the rear connecting frame 7, as shown in
In an embodiment, the rear engaging slot 711 is set on the rear positioning block 71, and the upper flat part 11 and the lower flat part 12 are respectively provided with the rear protrusion 16. In this embodiment, two rear positioning blocks 71 are vertically spaced apart on the rear connecting frame 7, and each rear positioning block 71 is opened with a rear engaging slot 711. In the assembly process, first the rear connecting frame 7 is configured on the support 1. Under the circumstances, the rear engaging slot 711 is set on the rear protrusion 16, then the rear cover 5 is configured on the rear connecting frame 7. Accordingly, the rear positioning slot 51 is engaged on the rear positioning block 71.
In order to facilitate sampling of battery modules, as shown in
In an embodiment, as shown in
In an embodiment, the current collecting sampling plate 8 is opened with a positioning hole 82, and the rear connecting frame 7 is provided with a positioning column 72.
In an embodiment, after the current collecting sampling plate 8 and the rear connecting frame 7 are positioned and connected, they may be fixed by heat riveting. In other embodiments, the current collecting sampling plate 8 and the rear connecting frame 7 may also be fixed by integral injection molding.
In order to reduce the length of the housing, an embedding slot 73 is provided on the rear connecting frame 7, and the current collecting sampling plate 8 may be embedded in the embedding slot 73. When the current collecting sampling plate 8 and the rear connecting frame 7 are positioned and connected, the two mentioned above may be embedded, so the overall thickness of the current collecting sampling plate 8 and the rear the connecting frame 7 is less than the sum of the thicknesses of the two mentioned above.
As shown in
In an embodiment, two claws 74 are vertically spaced apart on the rear connecting frame 7 to ensure the connection strength of the rear connecting frame 7 and the support 1.
In an embodiment, as shown in
In an embodiment, at least two clamping elastic pieces 742 are arranged on the supporting main body 741, and at least two clamping elastic pieces 742 are arranged at intervals along the deeply clamping direction to increase the clamping force of the claw 74.
In an embodiment, the end portion of the first supporting part 7411 is an arc-shaped surface; the end portion of the second supporting part 7412 is an arc-shaped surface. The arc-shaped surface structure may serve a guiding function to allow the connecting part 13 to be smoothly inserted into the claw 74 and improve the convenience of assembly.
As shown in
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/143624 | 12/31/2021 | WO |
