Battery pack, power device and energy storage device

Abstract

The utility model provides a battery pack, a power device and an energy storage device, the battery pack comprises a side frame, a bottom guard plate arranged at the bottom of the side frame, a liquid cooling plate arranged on the bottom guard plate, and a buffer part arranged between the bottom guard plate and the liquid cooling plate; the buffer part is at least arranged corresponding to a non-runner area of the liquid cooling plate, and the buffer part is used for buffering when the bottom protection plate and the liquid cooling plate are extruded. According to the battery pack disclosed by the utility model, a sandwich-like structural design can be formed to buffer the extrusion energy to the liquid cooling plate and the battery cell module when the bottom protection plate is impacted, so that the safety of the whole pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack. At the same time, the utility model also relates to a power device provided with the battery pack, and an energy storage device provided with the battery pack. Background Art

[0002] At present, the safety performance of battery packs, as the power core of electric vehicles, has attracted much attention. However, in the existing technology, in order to improve the energy density of the whole pack, some battery packs have eliminated the internal transverse and longitudinal beam structures, which will lead to insufficient structural strength of the whole pack, reduce the vibration resistance and protection performance of the whole pack, and make it difficult to meet the safety design requirements. Utility Model Content

[0003] In view of this, the present invention aims to provide a battery pack with good safety in use.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A battery pack comprises a side frame, a bottom guard plate arranged at the bottom of the side frame, a liquid cooling plate arranged on the bottom guard plate, and a buffer component arranged between the bottom guard plate and the liquid cooling plate;

[0006] The buffer component is arranged at least corresponding to the non-flow channel area of ​​the liquid cooling plate, and the buffer component is used to form a buffer when the bottom guard plate and the liquid cooling plate are squeezed.

[0007] Furthermore, the buffer component includes a plurality of buffer blocks arranged at intervals along the length direction of the bottom guard plate, and each of the buffer blocks extends along the width direction of the bottom guard plate.

[0008] Furthermore, the buffer component includes a plurality of buffer assemblies arranged at intervals along the length direction of the bottom guard plate; each of the buffer assemblies includes a plurality of buffer blocks arranged at intervals along the width direction of the bottom guard plate.

[0009] Furthermore, the buffer component and the bottom guard plate, as well as the buffer component and the liquid cooling plate are all glued together.

[0010] Furthermore, the buffer component is made of MPP foam or PP board.

[0011] Furthermore, the liquid cooling plate includes a substrate, a flow channel plate snap-fitted onto the substrate, and a flow channel formed between the substrate and the flow channel plate; the non-flow channel area is located on a side of the flow channel plate away from the substrate, and the non-flow channel area is formed in an area of ​​the flow channel plate outside the flow channel.

[0012] Furthermore, the non-flow channel area includes a plurality of transverse sub-areas and a plurality of longitudinal sub-areas; the buffer component includes a transverse buffer strip corresponding to each of the transverse sub-areas one by one, and a longitudinal buffer strip corresponding to each of the longitudinal sub-areas one by one.

[0013] Furthermore, the bottom guard plate is provided with a plurality of transverse protrusions and a plurality of longitudinal protrusions, each of the transverse protrusions corresponds one-to-one to each of the transverse sub-regions, and each of the longitudinal protrusions corresponds one-to-one to each of the longitudinal sub-regions; or, the bottom guard plate is provided with a plurality of transverse pits and a plurality of longitudinal pits, each of the transverse pits corresponds one-to-one to each of the transverse sub-regions, and each of the longitudinal pits corresponds one-to-one to each of the longitudinal sub-regions.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The battery pack described in the utility model can form a structural design similar to a "sandwich" by providing a buffer component between the bottom guard plate and the liquid cooling plate, and the buffer component is arranged at least corresponding to the non-flow channel area, so as to buffer the squeezing energy of the liquid cooling plate and the battery cell module when the bottom guard plate is impacted, so that the whole pack has better anti-vibration performance and bottom protection performance, thereby improving the safety of the whole pack.

[0016] Secondly, by providing multiple buffer blocks spaced apart along the length direction of the bottom guard plate, and each buffer block extending along the width direction of the bottom guard plate, the coverage of the buffer component can be increased, thereby improving the buffer effect. The buffer component is designed as multiple buffer components spaced apart along the length direction of the bottom guard plate, and each buffer component includes multiple buffer blocks spaced apart along the width direction of the bottom guard plate, so that the size of the forming mold of the buffer block can be reduced, which is convenient for assembly and transportation. The buffer component is made of MPP foam or PP board, which is conducive to cost reduction.

[0017] Moreover, by configuring the buffer component to be a plurality of transverse buffer strips and a plurality of longitudinal buffer strips, not only can the buffer component be more adaptable, but also the size of the molding mold can be smaller, thereby ensuring the convenience of assembly and transportation of the buffer component. At the same time, the non-flow channel area is configured to be a plurality of transverse sub-areas and a plurality of longitudinal sub-areas, and each transverse sub-area corresponds one-to-one to each transverse buffer strip, and each longitudinal sub-area corresponds one-to-one to each longitudinal buffer strip, thereby saving space in the height direction of the battery pack, and ensuring the energy density of the battery pack while improving safety.

[0018] Furthermore, each lateral protrusion corresponds one-to-one to each lateral sub-region, each longitudinal protrusion corresponds one-to-one to each longitudinal sub-region, or each lateral pit corresponds one-to-one to each lateral sub-region, each longitudinal pit corresponds one-to-one to each longitudinal sub-region, which can enhance the structural strength of the bottom guard plate itself, and then combine with the buffer component to enhance the safety of the entire package.

[0019] In addition, another object of the present invention is to provide a power device, in which the battery pack as described above is provided.

[0020] In addition, another object of the present invention is to provide an energy storage device, in which the above-mentioned battery pack is configured.

[0021] The power device, energy storage device and the above-mentioned battery pack described in the utility model have the same beneficial effects as compared with the traditional technology, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the battery pack according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the liquid cooling plate according to an embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the flow channel plate according to an embodiment of the utility model;

[0026] Figure 4 This is a schematic structural diagram of a first example of a buffer component according to an embodiment of the utility model;

[0027] Figure 5 This is a schematic structural diagram of a second example of the buffer component according to an embodiment of the utility model;

[0028] Figure 6 This is a schematic structural diagram of a third example of the buffer component according to an embodiment of the utility model;

[0029] Description of reference numerals:

[0030] 11. Bottom guard plate; 111. lateral protrusion; 112. longitudinal protrusion; 12. side frame; 13. liquid cooling plate; 131. base plate; 132. flow channel plate; 133. non-flow channel area; 1331. lateral sub-area; 1332. longitudinal sub-area; 134. flow channel;

[0031] 20. Buffer component; 21. Buffer block; 22. Horizontal buffer strip; 23. Longitudinal buffer strip;

[0032] 31. Cover plate; 41. Battery cell; 51. Bus bar; 61. Bracket. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] Embodiment 1

[0038] The present embodiment relates to a battery pack, which can form a "sandwich"-like structure by adding a buffer component 20, so as to effectively improve the safety of the whole pack, and compared with the method of directly increasing the stiffness of the bottom guard plate 11, the whole pack is lighter.

[0039] In terms of overall structure, Figures 1 to 3 As shown, the battery pack of this embodiment includes a side frame 12, a bottom guard plate 11 arranged at the bottom of the side frame 12, a liquid cooling plate 13 arranged on the bottom guard plate 11, and a buffer component 20 arranged between the bottom guard plate 11 and the liquid cooling plate 13.

[0040] The buffer component 20 is arranged at least corresponding to the non-flow channel area 133 of the liquid cooling plate 13 , and the buffer component 20 is used to form a buffer when the bottom guard plate 11 and the liquid cooling plate 13 are squeezed.

[0041] It should be noted that the battery pack of the present embodiment particularly refers to a battery pack without a longitudinal beam structure in the whole pack, and the relevant structural parts of the battery pack not mentioned in the present embodiment can refer to the various structures of related products commonly used in the prior art. For example, the battery pack also includes a battery module composed of multiple battery cells 41 arranged on the liquid cooling plate 13, a bus 51 arranged on the battery module, a bracket 61 for supporting the bus 51, and a cover plate 31 arranged on the top of the frame.

[0042] At the same time, the liquid cooling plate 13 of this embodiment has the functions of cooling and equalizing the temperature of the battery module and providing support, and the liquid cooling plate 13 is connected to the frame by welding. Moreover, compared with the prior art, the structural form of the battery pack in this embodiment is more effective in protecting the battery cell 41 with the explosion-proof valve facing upward or the pole facing upward.

[0043] Based on the above overall introduction, specifically, in this embodiment, as a preferred implementation form, see Figure 4 As shown, the buffer component 20 includes a plurality of buffer blocks 21 arranged at intervals along the length direction of the bottom guard plate 11, and each buffer block 21 extends along the width direction of the bottom guard plate 11. Thus, the coverage of the buffer component 20 can be increased, thereby improving the buffer effect.

[0044] Of course, in addition to being configured in the above-mentioned structural form, the buffer component 20 of this embodiment can also adopt other structural forms that are conducive to lifting, assembling and transporting the buffer component 20, such as Figure 4 As shown in , as a preferred implementation form, the buffer component 20 of this embodiment includes a plurality of buffer components arranged at intervals along the length direction of the bottom guard plate 11, and each buffer component includes a plurality of buffer blocks 21 arranged at intervals along the width direction of the bottom guard plate 11.

[0045] The advantage of such a configuration is that the size of the molding die of the buffer block 21 can be reduced, so as to facilitate the assembly and transportation of the buffer block 21. Moreover, if necessary, the buffer block 21 can also be designed into a square to achieve a standardized design of the buffer block 21, thereby facilitating assembly, transportation and cost reduction.

[0046] In addition, in this embodiment, as a preferred implementation form, the buffer component 20 and the bottom guard plate 11, as well as the buffer component 20 and the liquid cooling plate 13 are all glued together. In specific implementation, thermal conductive structural adhesive can be used for gluing to provide reliable heat conduction and connection.

[0047] At the same time, in this embodiment, as a preferred implementation form, the buffer component 20 is made of mpp foam (Microcellular Polypropylene foam) or PP (polypropylene) board, which can help reduce costs while ensuring that the buffer component 20 has sufficient buffering effect.

[0048] In addition, in this embodiment, as a preferred implementation form, see Figure 2 As shown, the liquid cooling plate 13 includes a base plate 131, a flow channel plate 132 that is buckled and arranged on the base plate 131, and a flow channel 134 formed between the base plate 131 and the flow channel plate 132. The non-flow channel area 133 is located on a side of the flow channel plate 132 away from the base plate 131, and the non-flow channel area 133 is formed in an area of ​​the flow channel plate 132 that is located outside the flow channel 134.

[0049] Of course, the related structural parts of the liquid cooling plate 13 not mentioned above can refer to the various structures of the common cold plate structure in the prior art, for example, the liquid cooling plate 13 also has a flow channel 134 inlet and a flow channel 134 outlet.

[0050] In addition, in this embodiment, as a preferred implementation form, see Figure 3 and Figure 6 As shown, the non-flow channel area 133 includes a plurality of transverse sub-areas 1331 and a plurality of longitudinal sub-areas 1332. The buffer component 20 may also be configured to include transverse buffer strips 22 corresponding to each transverse sub-area 1331 and longitudinal buffer strips 23 corresponding to each longitudinal sub-area 1332.

[0051] In this way, not only can the buffer component 20 be more applicable, but also the size of the molding mold can be smaller, ensuring the convenience of assembly and transportation of the buffer component 20. At the same time, each transverse sub-area 1331 corresponds one-to-one with each transverse buffer bar 22, and each longitudinal sub-area 1332 corresponds one-to-one with each longitudinal buffer bar 23, which can also save space in the height direction of the battery pack, which is beneficial to improve safety while ensuring the energy density of the battery pack.

[0052] In addition, in this embodiment, as a preferred implementation form, Figure 6 As shown, the bottom guard plate 11 of this embodiment is provided with a plurality of transverse protrusions 111 and a plurality of longitudinal protrusions 112, each transverse protrusion 111 corresponds one-to-one to each transverse sub-region 1331, and each longitudinal protrusion 112 corresponds one-to-one to each longitudinal sub-region 1332. Such an arrangement can improve the structural strength of the bottom guard plate 11 itself without increasing the weight, and further improve the safety of the entire package in combination with the buffer component 20.

[0053] At the same time, if necessary, the bottom guard plate 11 of this embodiment can also be set to have multiple transverse pits and multiple longitudinal pits, and each transverse pit corresponds one-to-one to each transverse sub-area 1331, and each longitudinal pit corresponds one-to-one to each longitudinal sub-area 1332, which can also achieve the effect of improving the structural strength of the bottom guard plate 11 itself.

[0054] It should be mentioned that, during specific implementation, the specific structure of the bottom guard plate 11 of this embodiment can be set to be basically similar or identical to the structure of the flow channel plate 132 to facilitate cost reduction, and the bottom guard plate 11 is preferably made of a steel plate with a greater rigidity than the common flow channel plate 132 to ensure that the bottom guard plate 11 has sufficient structural strength.

[0055] The battery pack of this embodiment can form a "sandwich"-like structural design by disposing a buffer component 20 between the bottom guard plate 11 and the liquid cooling plate 13, and the buffer component 20 is arranged at least corresponding to the non-flow channel area 133, so as to buffer the squeezing energy of the liquid cooling plate 13 and the battery cell 41 module when the bottom guard plate 11 is impacted, so that the whole pack has better anti-vibration performance and bottom protection performance, thereby improving the safety of the whole pack.

[0056] In addition, compared with existing battery pack products, the overall structure of the battery pack of this embodiment is relatively light, low in cost, and has a simple manufacturing process, which can greatly shorten the battery pack performance verification cycle.

[0057] Embodiment 2

[0058] This embodiment relates to a power device, in which the battery pack in the first embodiment is arranged. At the same time, this embodiment also relates to an energy storage device, in which the battery pack in the first embodiment is also arranged.

[0059] The power device and energy storage device of this embodiment, by setting the battery pack in the first embodiment, can improve the quality of the finished product by enhancing the vibration resistance and bottom protection performance of the battery pack, thereby improving the market competitiveness.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: It comprises a side frame, a bottom guard plate arranged at the bottom of the side frame, a liquid cooling plate arranged on the bottom guard plate, and a buffer component arranged between the bottom guard plate and the liquid cooling plate; The buffer component is arranged at least corresponding to the non-flow channel area of ​​the liquid cooling plate, and the buffer component is used to form a buffer when the bottom guard plate and the liquid cooling plate are squeezed; The liquid cooling plate includes a base plate, a flow channel plate buckled on the base plate, and a flow channel formed between the base plate and the flow channel plate; The non-flow channel area is located on a side of the flow channel plate away from the substrate, and the non-flow channel area is formed in a region of the flow channel plate outside the flow channel.

2. The battery pack according to claim 1, characterized in that: The buffer component includes a plurality of buffer blocks arranged at intervals along the length direction of the bottom guard plate, and each of the buffer blocks extends along the width direction of the bottom guard plate.

3. The battery pack according to claim 1, characterized in that: The buffer component includes a plurality of buffer components arranged at intervals along the length direction of the bottom guard plate; Each of the buffer assemblies includes a plurality of buffer blocks arranged at intervals along the width direction of the bottom guard plate.

4. The battery pack according to claim 1, characterized in that: The buffer component and the bottom guard plate are both glued together, as well as the buffer component and the liquid cooling plate.

5. The battery pack according to claim 4, characterized in that: The buffer component is made of MPP foam or PP board.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The non-flow channel area includes a plurality of transverse sub-areas and a plurality of longitudinal sub-areas; The buffer component includes a transverse buffer strip corresponding to each of the transverse sub-regions one by one, and a longitudinal buffer strip corresponding to each of the longitudinal sub-regions one by one.

7. The battery pack according to claim 6, characterized in that: The bottom guard plate is provided with a plurality of transverse protrusions and a plurality of longitudinal protrusions, each of the transverse protrusions corresponds to each of the transverse sub-regions one by one, and each of the longitudinal protrusions corresponds to each of the longitudinal sub-regions one by one; or, The bottom guard plate is provided with a plurality of transverse pits and a plurality of longitudinal pits, each of the transverse pits corresponds one-to-one to each of the transverse sub-regions, and each of the longitudinal pits corresponds one-to-one to each of the longitudinal sub-regions.

8. A power device, characterized in that: The power device is provided with a battery pack according to any one of claims 1 to 7.

9. An energy storage device, characterized in that: The energy storage device is provided with a battery pack according to any one of claims 1 to 7.

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