Battery pack

Abstract

The utility model provides a kind of battery pack, the battery pack includes frame;Bottom plate, be arranged in the below of the frame;Cover plate, be arranged in the above of the frame, the frame, the bottom plate and the cover plate form accommodating space together;One or more battery modules are arranged in the accommodating space, and each battery module includes multiple electric core.The lower surface of the battery module and the bottom plate form first flow channel, the side surface of the battery module and the side surface of the frame form second flow channel and the adjacent electric core in the battery module form, the upper surface of the battery module and the cover plate form third flow channel, wherein, cooling liquid flows in the first flow channel, the second flow channel and the third flow channel from outside.

Description

Technical Field

[0001] This utility model relates to a battery pack, specifically an immersion liquid-cooled battery pack. Background Technology

[0002] With the global energy structure transformation and the continuous increase in renewable energy penetration, the energy storage market has experienced explosive growth. Technological iterations of energy storage systems are accelerating towards the goals of large capacity, high energy density, long lifespan, and low cost. Under this trend, the capacity of individual energy storage cells is constantly breaking through, evolving towards 500Ah and above. This technological leap has brought new challenges and requirements to battery system design—how to build efficient, safe, and reliable energy storage systems based on large-capacity cells has become a key issue that the industry urgently needs to address.

[0003] Among the many technical challenges, thermal management is particularly prominent. Large-capacity battery cells, due to their significantly increased energy density, experience a substantial increase in the rate and total amount of heat generation during charging and discharging, leading to two core contradictions: First, the faster accumulation of heat within the cell means that if heat dissipation is not timely, it can easily exceed the thermal runaway threshold, posing a serious threat to system safety. Second, the increased size and power of individual battery cells make it difficult to guarantee temperature consistency between cells; deteriorating temperature consistency accelerates battery aging and degradation, significantly shortening the overall lifespan of the system.

[0004] Therefore, there is an urgent need for a cooling solution that can effectively address the thermal management issues of large-capacity battery cells. Utility Model Content

[0005] To address the aforementioned problems, this invention provides an immersion cooling solution that allows for the installation of a flow guiding structure inside the battery pack without occupying space for the battery cells.

[0006] According to one aspect of the present invention, a battery pack is provided, the battery pack comprising: a frame; a base plate disposed below the frame; a cover plate disposed above the frame, the frame, the base plate, and the cover plate together forming a receiving space; one or more battery modules disposed in the receiving space, and each battery module comprising multiple battery cells, wherein a first flow channel is formed between the lower surface of the battery module and the base plate, a second flow channel is formed between the side surface of the battery module and the side surface of the frame and between adjacent battery cells in the battery module, and a third flow channel is formed between the upper surface of the battery module and the cover plate, wherein coolant flowing in from the outside flows in the first flow channel, the second flow channel, and the third flow channel.

[0007] The base plate may have a plurality of bottom support members for supporting the lower surface of the battery module. The plurality of bottom support members extend along a first direction and are spaced apart from each other in a second direction perpendicular to the first direction, wherein the first flow channel is formed between adjacent bottom support members.

[0008] The height of the plurality of bottom support members (21) can be 3mm-5mm.

[0009] In each of one or more of the battery modules, a side support may be provided between the side surfaces of adjacent cells, the side support being coupled to the side surfaces of the adjacent cells, wherein the side support includes a flow guide extending upward in a third direction perpendicular to the first direction and the second direction, thereby forming a second flow channel between the flow guides.

[0010] The side support may further include a connecting support formed at the lower end of the flow guide support, the connecting support closing the bottom of the portion of the second flow channel located between the side surfaces of the adjacent cells.

[0011] The second flow channel may include a second-first flow channel and a second-second flow channel, wherein the second-first flow channel is formed between the one or more battery modules and the inner surface of the frame, the second-second flow channel is formed between the adjacent cells, and wherein the coolant flows along the path of the first flow channel, the second-first flow channel, the third flow channel and the second-second flow channel.

[0012] The side support may include at least one of rubber, modified polypropylene, and foam material.

[0013] The frame may include a first side plate and a second side plate facing each other in the first direction. The battery pack may also include an inlet and an outlet disposed on the frame. The inlet is disposed on the first side plate to introduce the coolant into the receiving space.

[0014] The battery pack further includes one or more support plates disposed in the frame, the one or more support plates forming one or more partitions in the accommodating space corresponding to the number of the one or more battery modules, each partition being provided with a corresponding battery module, and each of the one or more battery modules being supported by the large surface of the battery cells on the side surfaces of a plurality of battery cells on the frame and / or the support plates.

[0015] An end-face mounting bracket may be provided on the large surface of one of the multiple cells of each battery module that is adjacent to the side surface of the frame and / or the support plate, so as to be mounted on the frame and / or the support plate by means of the end-face mounting bracket, wherein the end-face mounting bracket extends along a third direction perpendicular to the first direction and the second direction, and is spaced apart in the first direction or the second direction to form part of the second flow channel between adjacent end-face mounting brackets.

[0016] The one or more support plates may be disposed between the first side plate and the second side plate and spaced apart from each other in the first direction, wherein the large facets of each of the plurality of battery cells are opposite to each other in the first direction.

[0017] One or more of the support plates may include a first support plate disposed adjacent to the first side plate, a flow guiding region being formed between the first side plate and the first support plate, the liquid outlet being formed on the frame and communicating with the flow guiding region from the outside of the frame, and wherein the liquid inlet may be formed in the first side plate and communicating with the first flow channel through a plurality of flow guiding pipes disposed in the flow guiding region.

[0018] The base plate can be a liquid-cooled plate or a direct-cooled plate.

[0019] When the base plate is a liquid-cooled plate, a coolant inlet and a coolant outlet located outside the accommodating space may be provided on the liquid-cooled plate.

[0020] According to an embodiment of this utility model, by making full use of the internal space of the battery pack and setting a coolant guiding structure on the upper and lower surfaces and side surfaces of the battery cell, an immersion liquid-cooled battery pack is realized, thereby improving heat dissipation efficiency and effectively improving the volumetric packing efficiency and energy density of the battery pack.

[0021] In addition, according to the above embodiments of this utility model, the battery cell can be cooled in all directions at 360°, effectively reducing the maximum temperature of the battery cell and the temperature difference between the battery cells, and greatly improving the safety and cycle life of the battery cell. Attached Figure Description

[0022] The above and / or other objects and advantages of this utility model will become more apparent from the following description of embodiments in conjunction with the accompanying drawings, wherein: Figure 1 This is an exploded perspective view of a battery pack according to an embodiment of the present invention.

[0023] Figure 2 This is a perspective view of a battery module according to an embodiment of the present invention.

[0024] Figure 3This is a plan view of a battery module according to an embodiment of the present invention.

[0025] Figure 4 It is along Figure 3 The first example cross-sectional view is taken from line AA.

[0026] Figure 5 It is along Figure 3 The first example cross-sectional view of line BB.

[0027] Figure 6 This is a schematic diagram of the flow path of the coolant along the flow channel according to the first example.

[0028] Figure 7 It is along Figure 3 The second example cross-sectional view taken by AA.

[0029] Figure 8 It is along Figure 3 The second example cross-sectional view of BB.

[0030] Figure 9 This is a schematic diagram of the flow path of the coolant along the flow channel according to the second example.

[0031] Figure 10 yes Figure 3 An enlarged view of part G in the image.

[0032] Figure 11 This is a plan view of the structure of the battery pack according to an embodiment of the present invention, excluding the cover plate and the battery module.

[0033] Figure 12 It is along Figure 11 The cross-sectional view taken from line CC.

[0034] Figure 13 It is along Figure 11 The cross-sectional view of line DD.

[0035] Figure 14 This is a plan view of the battery pack structure according to an embodiment of the present invention, excluding the cover plate.

[0036] Figure 15 It is along Figure 14 The first example cross-sectional view of the line EE.

[0037] Figure 16 It is along Figure 14 The first example cross-sectional view of the line FF.

[0038] Figure 17 It is along Figure 14 The second example cross-sectional view of the line EE.

[0039] Figure 18 It is along Figure 14 The second example cross-sectional view is taken from the line FF.

[0040] Figure 19 This is an exploded perspective view of a battery pack according to another embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures: 10-Frame, 20-Base plate, 20-Liquid cooling plate, 30-Cover plate, 40-Guide pipe, 100-Battery module, 110-Cell, 111-Guide support, 112-Connecting support, 113-End face mounting bracket, 11-Inlet, 12-Outlet, 13-First side plate, 14-Second side plate, 16-Support plate, 16a-First support plate, 20b-Liquid outlet, 21-Bottom support, A-Guide area, B-Mixing area, P1-First flow channel, P2-Second flow channel, P21-Second-First flow channel, P22-Second-Second flow channel, P3-Third flow channel. Detailed Implementation

[0042] Exemplary embodiments of the present invention will now be described more fully with reference to the accompanying drawings. However, it should not be construed as limiting the embodiments of the present invention to those described herein. The same reference numerals in the drawings denote the same structures, and therefore repeated descriptions of them will be omitted.

[0043] In energy storage systems, traditional cooling methods involve placing coolant at the bottom of the battery pack. However, this bottom-cooling approach, which relies solely on the limited area at the bottom of the cells for heat exchange, is inefficient enough to meet the rapid heat exchange requirements of large-capacity cells. Currently, immersion-type liquid cooling is being gradually adopted. This involves directly immersing the cells in insulating coolant, utilizing the direct encapsulation of the liquid to achieve all-around heat exchange. This method improves heat dissipation efficiency by approximately 50% compared to traditional liquid cooling methods, demonstrating significant advantages in temperature control accuracy and temperature uniformity.

[0044] However, to ensure the uniformity of coolant flow rate and distribution within the tank, the immersion liquid cooling solution requires specialized flow guiding structures and channels inside the tank. These structures occupy a significant amount of space for cell arrangement, leading to a reduction in the volumetric packing efficiency and energy density of the battery system. They also increase the complexity of structural design and manufacturing costs, thus weakening the product's market competitiveness.

[0045] This invention provides a battery pack employing an immersion liquid cooling solution. The embodiments of this invention are described in detail below with reference to the accompanying drawings.

[0046] Figure 1 This is an exploded perspective view of a battery pack according to an embodiment of the present invention.

[0047] like Figure 1 As shown, the battery pack according to an embodiment of the present invention may include a frame 10, a base plate 20 disposed below the frame 10, a cover plate 30 disposed above the frame 10, and one or more battery modules 100 disposed in the receiving space formed by the frame 10, the base plate 20, and the cover plate 30, wherein each battery module includes a plurality of battery cells 110. Furthermore, a first flow channel P1 is formed between the lower surface of the battery module 100 and the base plate 20, a second flow channel P2 is formed between the side surface of the battery module 100 and the side surface of the frame 10, and between adjacent battery cells 110 in the battery module 100, and a third flow channel P3 is formed between the upper surface of the battery module 100 and the cover plate 30, and coolant flowing in from the outside flows in the first flow channel P1, the second flow channel P2, and the third flow channel P3.

[0048] The battery pack according to the embodiments of the present invention utilizes the space between adjacent cells 110 to set up a flow channel for coolant, making full use of the internal space of the frame, improving volumetric packing efficiency and energy density, and reducing manufacturing costs.

[0049] like Figure 1 As shown, a plurality of bottom support members 21 are formed on the base plate 20 for supporting the lower surface of the battery module 100. The plurality of bottom support members 21 can extend along a first direction and are spaced apart from each other in a second direction perpendicular to the first direction, so that a first flow channel P1 can be formed between adjacent bottom support members 21. That is, the first flow channel P1 may include a plurality of first flow channels P1 formed between the battery module 100 and the base plate 20, and each first flow channel P1 is formed by the battery module 100, the base plate 20 and the adjacent bottom support member 21, and guides the coolant to flow along the first direction.

[0050] According to a preferred embodiment of the present invention, the heights of the multiple bottom support members 21 are the same and can be within the range of 3mm-5mm. By keeping the height of the bottom support members 21 within this range, heat exchange of the battery module can be effectively achieved, while avoiding increasing the overall height of the battery system, thereby preventing excessive accumulation of coolant at the bottom of the battery cells and increasing the weight of the entire battery pack. Preferably, the height of the multiple bottom support members 21 can be 3mm.

[0051] In addition, according to a preferred embodiment, the bottom support 21 can be made of insulating materials such as polycarbonate, bakelite, plastic, or composite materials.

[0052] Figures 2 to 10 A schematic diagram of a battery module and its internally formed second flow channel according to an embodiment of the present invention is shown, wherein, Figures 4 to 6 A schematic diagram of the flow channel, including the first example, is shown. Figures 7 to 9 A schematic diagram of the flow channel, including the second example, is shown.

[0053] The following is combined Figures 2 to 10 This invention describes the side support members between the cells of a battery module according to an embodiment of the present invention.

[0054] According to an embodiment, in each of one or more battery modules 100, a side support may be provided between the side surfaces of adjacent cells 110, the side support being attached to the side surface of the adjacent cells 110. The side support may include a flow guide support 111 extending upward in a third direction perpendicular to a first direction and a second direction, thereby forming at least a portion of a second flow channel P2 between the flow guide supports 111.

[0055] According to an embodiment of the present invention, a gap can be formed between adjacent battery cells 110 by a side support member, and the side support member can be made of an insulating material and can provide buffering and support between adjacent battery cells 110. Preferably, the side support member can include at least one of rubber, modified polypropylene and foam material.

[0056] In addition, the thickness of the side support can be in the range of 3mm-4mm, so that there can be a spacing of 3mm-4mm between adjacent cells 110. Preferably, the thickness of the side support can be 3mm.

[0057] According to embodiments of the present invention, such as Figure 2 As shown, the side surfaces of the battery cell 110 include side surfaces opposite to each other in a first direction and side surfaces opposite to each other in a second direction. Side supports can abut between the side surfaces of adjacent battery cells 110 opposite to each other in the first direction and between the side surfaces of adjacent battery cells 110 opposite to each other in the second direction, thus enabling the side supports to support adjacent battery cells 110. Additionally, a second flow channel P2 can be formed between adjacent flow guide supports 111, allowing coolant to flow upwards along a predetermined path.

[0058] Based on the first example, such as Figure 4 and Figure 5 As shown, the upper and lower ends of each flow guide 111 are approximately flush with the upper and lower surfaces of the cell 110, respectively (i.e., the length of each flow guide 111 is approximately equal to the dimension of each cell 110 in the third direction) and the second flow channel P2 defined by the plurality of flow guides 111 connects the first flow channel P1 and the third flow channel P3.

[0059] In this case, such as Figure 6As shown, the coolant can flow along the paths of the first flow channel P1, the second flow channel P2, and the third flow channel P3. Along these paths, the coolant can immerse each cell within the battery pack, thereby improving the heat dissipation efficiency of the battery pack.

[0060] Furthermore, the length of the flow guide support 111 according to the first example is not limited to the case shown in the figure. For example, the length of each flow guide support 111 may also be slightly smaller than the size of the cell 110 in the third direction, as long as it can support the adjacent cell 110 and define the second flow channel P2 that connects the first flow channel P1 and the third flow channel P3.

[0061] Furthermore, according to the second example, such as Figures 7 to 9 As shown, the side support may further include a connecting support 112 formed at the lower end of the flow guide support 111, the connecting support 112 being able to close the bottom of the second flow channel P2 located between the side surfaces of adjacent cells 110.

[0062] Specifically, the second flow channel P2 may include a second-first flow channel P21 and a second-second flow channel P22. The second-first flow channel P21 may be formed between one or more battery modules 100 and the inner surface of the frame 10, and the second-second flow channel P22 may be formed between adjacent cells 110. That is, the second-first flow channel P21 can connect the first flow channel P1 and the third flow channel P3 to each other, while the second-second flow channel P22 can only connect to the third flow channel P3, and is isolated from the first flow channel P1 by a connecting support 112. In this case, the coolant in the containment space can flow along the path of the first flow channel P1, the second-first flow channel P21, the third flow channel P3, and the second-second flow channel P22. Compared to the first example, the flow path formed in the second example allows for a smaller temperature difference between cells located at different positions, resulting in better cooling.

[0063] also, Figure 9 The flow path shown can be either the flow path of a single battery module 100 or the overall flow path of all battery modules in the battery pack, depending on the arrangement direction and installation position of the battery modules 100, which will be described in detail later.

[0064] Figure 11 This is a plan view of the structure of the battery pack according to an embodiment of the present invention, excluding the cover plate 30 and the battery module 100. Figure 12 and Figure 13 They are along Figure 11 The cross-sectional view taken from lines CC and DD in the diagram.

[0065] like Figure 11As shown, the frame 10 may include a first side plate 13 and a second side plate 14 facing each other in a first direction. In addition, the battery pack may also include a liquid inlet 11 and a liquid outlet 12 disposed on the frame 10, the liquid inlet 11 being disposed on the first side plate 13 to introduce coolant into the receiving space.

[0066] In addition, such as Figure 12 As shown, to ensure uniform flow of coolant into the first flow channel P1, a mixing region B can be formed inside the lower end of the first side plate 13. The mixing region B can penetrate a portion of the first side plate 13 in a second direction. Furthermore, the battery pack may also include a guiding region A formed between the battery module 100 and the first side plate 13, in which multiple guiding pipes 40 can be disposed. Figure 11 and Figure 12 As shown, multiple guide pipes 40 can be installed on the base plate 20, with one end of each guide pipe 40 connected to the mixing region B formed inside the first side plate 13, and the other end connected to a corresponding first flow channel P1, thereby guiding the coolant introduced from the inlet 11 into each first flow channel P1. In this way, by integrating the guide structure directly with the internal housing space of the frame and battery pack, internal space can be effectively saved and the complexity of the piping design can be reduced.

[0067] This utility model is not limited to this; the mixing region B can also be located between the battery module 100 and the first side plate 13 (i.e., Figure 12 In the flow guiding region A shown, for example, the mixing region B can be replaced by a tubular member (not shown) extending in the second direction provided in the flow guiding region A. The inlet 11 can be connected to the tubular member through the first side plate 13. At the same time, the tubular member can include multiple branch pipes corresponding to the multiple first flow channels P1 respectively (that is, multiple branch pipes replace the above-mentioned multiple flow guiding pipes 40), thereby forming a flow guiding structure that introduces external coolant into the first flow channel P1.

[0068] Furthermore, the outlet 12 may also be formed on the frame 10 and communicate with the guide region A from the outside of the frame 10. For example, as shown in the figure, the outlet 12 may be located above the inlet 11, allowing the coolant flowing in the third flow channel P3 to flow into the guide region A and be discharged from the battery pack through the outlet 11 communicating with the guide region A. However, this is not a limitation; the outlet 12 may also be located at other positions on the frame 10, as long as it can communicate with the guide region A.

[0069] According to embodiments of the present invention, such as Figure 11 and Figure 12As shown, the battery pack may further include one or more support plates 16 disposed in the frame 10. The one or more support plates 16 form one or more partitions in the accommodating space corresponding to the number of one or more battery modules 100, and each partition is provided with a corresponding battery module 100. In addition, each battery module 100 can be supported on the frame 10 and / or the support plate 16 by the large surface area of ​​the side surface of a plurality of cells 110. Here, "large surface area of ​​cells" refers to the side surface with a larger area among the side surfaces of cells 110. In each battery module 100, an end face mounting bracket 113 may be provided on the outermost large surface area of ​​the entire battery module 100 to mount each battery module 100 on the frame 10 and / or the support plate 16 forming the corresponding partition through the end face mounting bracket 113.

[0070] The accompanying drawings of this utility model show a battery pack comprising two battery modules 100, with the large surface area of ​​the battery cells in each battery module 100 perpendicular to a first direction. The battery module 100 adjacent to the second side plate 14 is fixed to the support plate 16 and the second side plate 14 respectively via end-face mounting brackets 113, and another battery module 100 is fixed to two adjacent support plates 16 via end-face mounting brackets 113. However, this utility model is not limited to this; the number of battery modules may be more or less than shown in the drawings. Furthermore, the large surface area of ​​the battery cells in each battery module 100 may also be perpendicular to the second direction. In this case, each battery module 100 can be mounted on two side plates of the frame 10 facing each other in the second direction via end-face mounting brackets 113. This eliminates the need for individual support plates 16, allowing adjacent battery modules 100 to be directly connected via the aforementioned side supports. Alternatively, the side surface of each battery module 100 adjacent to the support plate 16 or the second side plate 14 can be mounted on the support plate 16 or the second side plate 14 via the aforementioned side supports. This invention is not limited to the above-described situation; other methods that can install each battery module 100 within the frame are also feasible.

[0071] Furthermore, as shown in the figure, each end-face mounting bracket 113 may have a shape extending along a third direction, and the end-face mounting brackets 113 may be spaced apart in a first direction or a second direction depending on the arrangement of each battery module 100, thereby forming part of a second flow channel P2 between adjacent end-face mounting brackets 113.

[0072] Other structures of the present invention will be described below with reference only to the situation shown in the accompanying drawings, but those skilled in the art should understand that corresponding structures for its variations are also readily conceived.

[0073] Figures 14 to 18 A view of the battery pack structure after only removing the cover plate 30 is shown, wherein, Figure 15 and Figure 16The first example above is shown. Figure 17 and Figure 18 The second example above is shown.

[0074] Combination Figures 12 to 18 The support plate 16 disposed in the frame 10 may be located between the first side plate 13 and the second side plate 14 and spaced apart from each other in a first direction, and the large faces of the cells 110 in each battery module 100 are opposite to each other in the first direction. Thus, in order to install the battery module 100 adjacent to the first side plate, the support plate 16 may include a first support plate 16a disposed adjacent to the first side plate 13. In this case, the first support plate 16a may be used as a space to divide the aforementioned flow guiding area A and the battery module 100 mounting area.

[0075] Furthermore, according to embodiments of the present invention, a second-first flow channel P21 can be formed between the surfaces of each battery module 100 connected to the support plate 16 or the second side plate 14, and a second-second flow channel P22 can be formed between adjacent cells of each battery module 100. In this case, a second-first flow channel P21 or a second-second flow channel P22 can be formed between the outer surface of each battery module 100 in the second direction and the corresponding inner surface of the frame 10 as needed. Specifically, when no support structure is provided between the outer surface of each battery module 100 in the second direction and the corresponding inner surface of the frame 10, the space between them can be used as a second-first flow channel P21; when a side support member including a connecting support member 112 is provided between the outer surface of each battery module 100 in the second direction and the corresponding inner surface of the frame 10, the space between them can be used as a second-second flow channel P22. In this case, each battery module has Figure 9 The flow path is shown in the second example.

[0076] According to embodiments of the present invention, as described above, Figure 9 The flow path in the second example shown can also be an overall flow path for all battery modules in the battery pack. In this case, the lower surface of the second flow channel between the multiple end-face mounting brackets 113 located between the respective battery module 100 and the support plate 16 can be sealed by a component that is the same as or similar to the connecting support 112, and only the second flow channels between all battery modules 100 and the second side plate 14 are included as the second-first flow channel P21. In addition, a second-first flow channel P21 or a second-second flow channel P22 can also be formed between the outer surface of each battery module 100 in the second direction and the corresponding inner surface of the frame 10 as required, the contents of which are the same as those in the above case, and therefore their repeated description is omitted.

[0077] Figure 19An exploded perspective view of a battery pack according to another embodiment of the present invention is shown.

[0078] According to Figures 1 to 18 Compared to the previous embodiment, the base plate in this embodiment can be a liquid-cooled plate or a direct-cooled plate. In this case, the heat dissipation efficiency of the battery pack can be further improved.

[0079] Furthermore, in implementation and according to Figures 1 to 18 In the case of having the same heat dissipation effect as the embodiments described above, the battery pack of this embodiment may further include a bottom support member that is thinner than the bottom support member 21 in the above embodiments, so as to further reduce the volume of the entire battery pack.

[0080] According to this embodiment, when the base plate is a liquid cooling plate 20′, the liquid cooling plate 20′ is provided with a coolant inlet 20a and a coolant outlet 20b located outside the accommodating space, so that the coolant circulates in the liquid cooling plate 20′.

[0081] In addition, such as Figure 1 and Figure 19 As shown, a plurality of reinforcing plates (not labeled) are also provided on the upper surface of the cover plate 30. These reinforcing plates are used to improve the overall strength of the cover plate 30, and their shape and arrangement are not limited to those shown in the attached figures.

[0082] According to the above embodiments of this utility model, 360° all-round cooling can be achieved for the battery cell, effectively reducing the maximum temperature of the battery cell and the temperature difference between the battery cells, and greatly improving the safety and cycle life of the battery cell.

[0083] In addition, by simplifying the flow channel design of the immersion liquid cooling solution, the internal complexity of the battery pack is reduced, which effectively improves the volumetric assembly efficiency and energy density of the battery pack and reduces production costs.

[0084] The features, structures, or characteristics described in this invention can be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a full understanding of embodiments of this invention. However, those skilled in the art will recognize that the technical solutions of this invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this invention.

Claims

1. A battery pack, characterized in that, include: Framework (10); The base plate (20) is located below the frame (10); A cover plate (30) is disposed above the frame (10), and the frame (10), the base plate (20) and the cover plate (30) together form a receiving space; One or more battery modules (100) are disposed in the receiving space, and each battery module includes multiple battery cells (110). A first flow channel (P1) is formed between the lower surface of the battery module (100) and the base plate (20); a second flow channel (P2) is formed between the side surface of the battery module (100) and the side surface of the frame (10) and between adjacent cells (110) in the battery module (100); and a third flow channel (P3) is formed between the upper surface of the battery module (100) and the cover plate (30). The coolant flowing in from the outside flows in the first channel (P1), the second channel (P2), and the third channel (P3).

2. The battery pack according to claim 1, characterized in that, The base plate (20) has a plurality of bottom support members (21) formed thereon for supporting the lower surface of the battery module (100). The plurality of bottom support members (21) extend along a first direction and are spaced apart from each other in a second direction perpendicular to the first direction. The first flow channel (P1) is formed between adjacent bottom support members (21).

3. The battery pack according to claim 2, characterized in that, The height of the plurality of bottom support members (21) is 3mm-5mm.

4. The battery pack according to claim 2, characterized in that, In each of the one or more battery modules (100), a side support is provided between the side surfaces of adjacent cells (110), the side support being coupled to the side surface of the adjacent cell (110). The side support includes a flow guide support (111) extending upward from a third direction perpendicular to the first direction and the second direction, thereby forming the second flow channel (P2) between the flow guide supports (111).

5. The battery pack according to claim 4, characterized in that, The side support also includes a connecting support (112) formed at the lower end of the flow guide support (111), the connecting support (112) closing the bottom of the portion of the second flow channel (P2) located between the side surfaces of the adjacent cells (110).

6. The battery pack according to claim 5, characterized in that, The second flow channel (P2) includes a second-first flow channel (P21) and a second-second flow channel (P22). Wherein, the second-first flow channel (P21) is formed between the inner surface of the one or more battery modules (100) and the frame (10), and the second-second flow channel (P22) is formed between the adjacent cells (110), and The coolant flows along the paths of the first flow channel (P1), the second-first flow channel (P21), the third flow channel (P3), and the second-second flow channel (P22).

7. The battery pack according to claim 6, characterized in that, The side support includes at least one of rubber, modified polypropylene, and foam material.

8. The battery pack according to any one of claims 1-7, characterized in that, The frame (10) includes a first side plate (13) and a second side plate (14) facing each other in a first direction. The battery pack also includes an inlet (11) and an outlet (12) disposed on the frame (10), the inlet (11) being disposed on the first side plate (13) to introduce the coolant into the receiving space.

9. The battery pack according to claim 8, characterized in that, The battery pack also includes one or more support plates (16) disposed in the frame (10), the one or more support plates (16) forming one or more partitions in the accommodating space corresponding to the number of the one or more battery modules (100), each partition being provided with a corresponding battery module (100). And each of the one or more battery modules (100) is supported on the frame (10) and / or the support plate (16) by the large surface of the battery cells (110) on the side surfaces of the multiple battery cells (110).

10. The battery pack according to claim 9, characterized in that, In each of the battery modules (100), an end-face mounting bracket (113) is provided on the large surface of one of the multiple cells (110) adjacent to the side surface of the frame (10) and / or the support plate (16) for mounting on the frame (10) and / or the support plate (16) via the end-face mounting bracket (113). The end face mounting bracket (113) extends along a third direction perpendicular to the first and second directions and is spaced apart in the first or second direction to form a portion of the second flow channel (P2) between adjacent end face mounting brackets (113).

11. The battery pack according to claim 10, characterized in that, The one or more support plates (16) are disposed between the first side plate (13) and the second side plate (14) and spaced apart from each other in a first direction. In this configuration, the large facets of each of the plurality of battery cells (110) are opposite to each other in a first direction.

12. The battery pack according to claim 11, characterized in that, One or more of the support plates (16) include a first support plate (16a) disposed adjacent to the first side plate (13). A flow guiding region (A) is formed between the first side plate (13) and the first support plate (16a). The liquid outlet (12) is formed on the frame (10) and communicates with the flow guiding region (A) from the outside of the frame (10). The inlet (11) is formed in the first side plate (13) and is connected to the first flow channel (P1) through a plurality of flow guide pipes (40) provided in the flow guide area (A).

13. The battery pack according to any one of claims 1-7, characterized in that, The base plate is a liquid-cooled plate or a direct-cooled plate.

14. The battery pack according to claim 13, characterized in that, When the base plate is a liquid-cooled plate (20′), the liquid-cooled plate (20′) is provided with a coolant inlet (20a) and a coolant outlet (20b) located outside the accommodating space.

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