Battery pack

Abstract

The utility model provides a battery pack which comprises a sheet metal stamping box body, a support structure and a liquid cooling plate, and the sheet metal stamping box body is provided with an accommodating cavity; the support structure is arranged on the cavity bottom face of the containing cavity. The liquid cooling plate support is arranged on the bracket structure and is detachably connected with the bracket structure; wherein the surface of one side, facing the liquid cooling plate, of the bracket structure is provided with a supporting convex hull, and the supporting convex hull is arranged away from the liquid cooling plate and protrudes out of the surface of one side, deviating from the bracket structure, of the liquid cooling plate; the battery pack further comprises an expansion supporting beam, and the expansion supporting beam is arranged on the supporting convex hull in a supporting mode so that a gap can be formed between the expansion supporting beam and the liquid cooling plate. According to the utility model, the problem that the liquid cooling design of the battery pack of the sheet metal stamping box body in the prior art cannot be realized is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack liquid cooling, and in particular to a battery pack. Background Art

[0002] In the existing technology, for battery packs with sheet metal stamping boxes, the sheet metal stamping boxes are mostly made of steel and require surface treatments such as electrophoresis and baking. The material of the liquid cooling plate for cooling the battery cells of the battery pack is usually aluminum with good thermal conductivity, but aluminum cannot be electrophoretically treated together with steel. Therefore, it is difficult to set a liquid cooling plate at the bottom of the existing sheet metal stamping box. Utility Model Content

[0003] The main purpose of the present invention is to provide a battery pack to solve the problem that the battery pack of the sheet metal stamping box in the prior art cannot realize liquid cooling design.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a battery pack is provided, including a sheet metal stamping box, a bracket structure and a liquid cooling plate, wherein the sheet metal stamping box has a accommodating cavity; the bracket structure is arranged on the bottom surface of the accommodating cavity; the liquid cooling plate support is arranged on the bracket structure and is detachably connected to the bracket structure; wherein the bracket structure has a supporting bulge on the surface facing the liquid cooling plate, and the supporting bulge is arranged to avoid the liquid cooling plate and protrude from the surface of the liquid cooling plate facing away from the bracket structure; the battery pack also includes an expansion support beam, and the expansion support beam support is arranged on the supporting bulge so that there is a gap between the expansion support beam and the liquid cooling plate.

[0005] In an exemplary embodiment, a surface of the bracket structure facing the liquid cooling plate further comprises an avoidance groove, and the avoidance groove is used to avoid the liquid cooling channel on the liquid cooling plate.

[0006] In an exemplary embodiment, the support structure includes a plurality of support beams and at least one support longitudinal beam, wherein the plurality of support beams are spaced apart along the length of the sheet metal stamping box, and the support longitudinal beam extends along the length of the sheet metal stamping box and passes through each support beam.

[0007] In an exemplary embodiment, a plurality of supporting cross beams and at least one supporting longitudinal beam divide the bottom surface of the accommodating cavity into a plurality of sub-regions, and at least one layer of cushioning foam is disposed in each sub-region.

[0008] In an exemplary embodiment, the liquid cooling plate is connected to the supporting cross beam by means of blind rivets; and / or the liquid cooling plate is connected to the supporting longitudinal beam by means of blind rivets.

[0009] In an exemplary embodiment, the support structure also includes a supporting wall beam, which is arranged on the wall surface of the accommodating cavity and extends along the length direction of the sheet metal stamping box, and the supporting wall beam has a supporting step; there are two supporting wall beams, and the two supporting wall beams are arranged opposite to each other, and the two sides of the width direction of the liquid cooling plate are respectively bonded to the two supporting steps.

[0010] In an exemplary embodiment, the support bulge includes a first support bulge; a plurality of first support bulges are arranged on the support beam, and the plurality of first support bulges are arranged at intervals along the length direction of the support beam, and the liquid cooling plate has a plurality of first limiting through holes, and the plurality of first limiting through holes are arranged one-to-one correspondingly to the plurality of first support bulges, and each first support bulge passes through each first limiting through hole and protrudes from a side surface of the liquid cooling plate away from the bottom surface of the cavity of the accommodating cavity, and the first support bulge has a first assembly hole.

[0011] In an exemplary embodiment, the expansion support beam also includes a transverse expansion beam and a plurality of first fasteners, wherein the transverse expansion beam has a plurality of second assembly holes, and the plurality of second assembly holes are arranged in a one-to-one correspondence with the plurality of first assembly holes; the plurality of first fasteners correspond one-to-one with the plurality of second assembly holes, and each first fastener passes through the second assembly hole and the first assembly hole in sequence to connect the transverse expansion beam and the supporting beam.

[0012] In an exemplary embodiment, the support structure also includes a supporting wall beam, which is arranged on the wall surface of the accommodating cavity and extends along the length direction of the sheet metal stamping box, and the supporting wall beam has a supporting step; a fixed bracket is also provided on the supporting wall beam, and two fixed brackets arranged opposite to each other on the two supporting wall beams are respectively connected to the two ends of the length direction of the transverse expansion beam.

[0013] In an exemplary embodiment, the support bulge includes a second support bulge, and a plurality of second support bulges are arranged on the support longitudinal beam. The plurality of second support bulges are arranged at intervals along the length direction of the support longitudinal beam. The liquid cooling plate has a plurality of second limiting through holes. The plurality of second limiting through holes are arranged one-to-one correspondingly to the plurality of second support bulges, and each second support bulge passes through each second limiting through hole and protrudes from the surface of the liquid cooling plate on the side away from the bottom surface of the accommodating cavity. The second support bulge has a third assembly hole.

[0014] In an exemplary embodiment, the expansion support beam also includes a longitudinal expansion beam and a plurality of second fasteners, wherein the longitudinal expansion beam has a plurality of fourth assembly holes, and the plurality of fourth assembly holes are arranged in a one-to-one correspondence with the plurality of third assembly holes; the plurality of second fasteners correspond one-to-one with the plurality of fourth assembly holes, and each second fastener passes through the fourth assembly hole and the third assembly hole in sequence to connect the longitudinal expansion beam and the supporting longitudinal beam.

[0015] By applying the technical solution of the present invention, a battery pack with a bracket structure and an expansion support beam is provided. By arranging the bracket structure on the bottom surface of the accommodating cavity of the sheet metal stamping box of the battery pack, while improving the overall structural strength of the sheet metal stamping box, the arrangement of the bracket structure also plays an effective supporting role for the liquid cooling plate, thereby ensuring the installation stability of the liquid cooling plate; in addition, a supporting bulge is provided on the surface of the bracket structure facing the liquid cooling plate, and the supporting bulge is arranged away from the liquid cooling plate and protrudes from the surface of the liquid cooling plate facing away from the bracket structure, and the expansion support beam support is arranged on the supporting bulge, so that there is a gap between the expansion support beam and the liquid cooling plate. During the heat dissipation of the liquid cooling plate, heat will not be transferred to the expansion support beam, thereby effectively preventing heat from being transferred to the bracket structure.

[0016] Considering that the sheet metal stamping box needs to undergo electrophoresis, baking and other process treatments, after the sheet metal stamping box completes the required electrophoresis, baking and other process treatments, the liquid cooling plate can be installed in the accommodating cavity of the sheet metal stamping box through the bracket structure to ensure that the liquid cooling plate provided in this application can provide effective heat dissipation for the battery cells of the battery pack, thereby ensuring that the battery cells can operate normally under suitable ambient temperature conditions, ensuring the service life of the battery pack, and then ensuring the energy storage reliability of the energy storage system, and further ensuring the power safety of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the exploded structure of a battery pack according to an optional embodiment of the present utility model is shown;

[0019] Figure 2 Shown Figure 1 A schematic diagram of a structure in which a bracket structure is provided in a receiving cavity of a sheet metal stamping box of a battery pack;

[0020] Figure 3 Shown Figure 2 A structural diagram of the sheet metal stamping box from another perspective;

[0021] Figure 4 Shown Figure 3 Schematic diagram of the enlarged structure at A in FIG;

[0022] Figure 5 Shown Figure 3 A schematic diagram of a structure in which a cushioning foam is arranged in a sheet metal stamping box;

[0023] Figure 6 Shown Figure 5 A schematic diagram of a structure in which a liquid cooling plate is arranged in a sheet metal stamping box;

[0024] Figure 7 Shown Figure 6 Schematic diagram of the enlarged structure at B in FIG;

[0025] Figure 8 Shown Figure 6 A schematic diagram of the structure of the sheet metal stamping box with transverse expansion beams and longitudinal expansion beams;

[0026] Figure 9 Shown Figure 2 Schematic diagram of the cross-sectional structure of the sheet metal stamping box, in which a partial enlarged schematic diagram of the support step is shown.

[0027] The above drawings include the following reference numerals:

[0028] 10. Sheet metal stamping box; 11. Accommodation cavity;

[0029] 20. Bracket structure; 21. Avoidance groove; 22. Support beam; 221. First support convex bump; 2211. First assembly hole; 23. Support longitudinal beam; 231. Second support convex bump; 2311. Third assembly hole; 24. Support wall beam; 241. Support step; 25. Structural adhesive;

[0030] 30. Liquid cooling plate; 31. First limiting through hole; 32. Second limiting through hole;

[0031] 40. Cushioning foam; 50. Blind rivets;

[0032] 60. Transverse expansion beam; 61. Second assembly hole;

[0033] 70. Fixed bracket;

[0034] 80. Longitudinal expansion beam; 81. Fourth assembly hole;

[0035] 90. Cover plate structure;

[0036] 100. Battery cell. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In order to solve the problem that the battery pack of the sheet metal stamping box in the prior art cannot realize liquid cooling design, the utility model provides a battery pack, wherein the energy storage system includes a battery pack, and the battery pack is the battery pack described above and below.

[0039] like Figures 1 to 9 As shown, the battery pack includes a sheet metal stamping box body 10, a bracket structure 20 and a liquid cooling plate 30, wherein the sheet metal stamping box body 10 has a accommodating cavity 11; the bracket structure 20 is arranged on the bottom surface of the accommodating cavity 11; the liquid cooling plate 30 is supported and arranged on the bracket structure 20 and is detachably connected to the bracket structure 20; wherein the bracket structure 20 has a supporting bulge on the surface facing the liquid cooling plate 30, and the supporting bulge is arranged to avoid the liquid cooling plate 30 and protrude from the surface of the liquid cooling plate 30 facing away from the bracket structure 20; the battery pack also includes an expansion support beam, which is supported and arranged on the supporting bulge so that there is a gap between the expansion support beam and the liquid cooling plate 30.

[0040] By applying the technical solution of the present invention, a battery pack with a bracket structure 20 and an expansion support beam is provided. By arranging the bracket structure 20 on the bottom surface of the accommodating cavity 11 of the sheet metal stamping box 10 of the battery pack, while improving the overall structural strength of the sheet metal stamping box 10, the arrangement of the bracket structure 20 also plays an effective supporting role for the liquid cooling plate 30, thereby ensuring the installation stability of the liquid cooling plate 30; in addition, a supporting bulge is provided on the surface of the bracket structure 20 facing the liquid cooling plate 30, and the supporting bulge avoids the liquid cooling plate and protrudes from the surface of the side of the liquid cooling plate away from the bracket structure 20, and the expansion support beam is supported on the supporting bulge, so that there is a gap between the expansion support beam and the liquid cooling plate 30. During the heat dissipation process of the liquid cooling plate 30, heat will not be transferred to the expansion support beam, thereby effectively preventing heat from being transferred to the bracket structure 20.

[0041] Considering that the sheet metal stamping box 10 needs to undergo electrophoresis, baking and other process treatments, after the sheet metal stamping box 10 completes the required electrophoresis, baking and other process treatments, the liquid cooling plate 30 can be installed in the accommodating cavity 11 of the sheet metal stamping box 10 through the bracket structure 20, ensuring that the liquid cooling plate 30 provided in this application can provide effective heat dissipation for the battery cell 100 of the battery pack, thereby ensuring that the battery cell 100 can operate normally under suitable ambient temperature conditions, ensuring the service life of the battery pack, and then ensuring the energy storage reliability of the energy storage system, and further ensuring the power safety of electrical equipment.

[0042] It should be noted that in this application, Figures 2 to 4 As shown, the support structure 20 further has an escape groove 21 on the side facing the liquid cooling plate 30. The escape groove 21 is used to avoid the liquid cooling channel on the liquid cooling plate 30. Thus, the provision of the escape groove 21 plays a role in avoiding the liquid cooling channel on the side of the liquid cooling plate 30 facing the bottom surface of the accommodating cavity 11. This ensures the support structure 20's reliable support for the liquid cooling plate 30 and also ensures the stability of the connection between the two.

[0043] like Figure 1 As shown, the battery pack further includes a cover structure 90 , which is disposed at the opening of the accommodating cavity 11 to protect the battery cell 100 .

[0044] like Figure 2 and Figure 3 As shown, the support structure 20 includes a plurality of support beams 22 and at least one support longitudinal beam 23. The plurality of support beams 22 are spaced apart along the length direction of the sheet metal stamping box 10, and the support longitudinal beams 23 extend along the length direction of the sheet metal stamping box 10 and pass through each support beam 22. In this way, by configuring the support structure 20 to include a plurality of support beams 22 and at least one support longitudinal beam 23, and at the same time, configuring the plurality of support beams 22 to be spaced apart along the length direction of the sheet metal stamping box 10, and the support longitudinal beams 23 extend along the length direction of the sheet metal stamping box 10 and pass through each support beam 22, it is beneficial to improve the overall structural strength of the sheet metal stamping box 10, and also to provide effective support for the liquid cooling plate 30, ensuring the installation reliability and stability of the liquid cooling plate 30. In addition, by configuring the support structure 20 to include a plurality of support beams 22 and at least one support longitudinal beam 23, the structure is relatively simple, easy to process and manufacture, and beneficial to saving the processing and manufacturing costs of the battery pack, thereby benefiting the economy of the energy storage system, and further beneficial to ensuring the economy of the electrical equipment.

[0045] like Figure 5As shown, multiple support beams 22 and at least one support longitudinal beam 23 divide the bottom surface of the accommodating cavity 11 into multiple sub-areas, each of which is provided with at least one layer of cushioning foam 40. Thus, the provision of cushioning foam 40 effectively supports the liquid cooling plate 30. Furthermore, the multiple support beams 22 and at least one support longitudinal beam 23 in the bracket structure 20, as well as the cushioning foam 40 in each sub-area, simultaneously support the liquid cooling plate 30, ensuring that the liquid cooling plate 30 has more contact support surfaces or points, thereby ensuring stable and reliable installation of the liquid cooling plate 30.

[0046] In addition, the setting of the buffer foam 40 can serve as a buffer design and have a heat preservation effect. It can also prevent the bottom from being damaged by a large impact force and damaging the liquid cooling channel on the liquid cooling plate 30 or damaging the battery cell 100, thereby protecting the liquid cooling channel of the liquid cooling plate 30 and the battery cell 100.

[0047] like Figure 6 and Figure 7 As shown, the liquid cooling plate 30 is connected to the supporting crossbeam 22 via blind rivets 50; and / or the liquid cooling plate 30 is connected to the supporting longitudinal beam 23 via blind rivets 50. This further ensures the reliable fixation of the liquid cooling plate 30, prevents the liquid cooling plate 30 from shaking during use of the battery pack, and ensures the stable installation of the liquid cooling plate 30.

[0048] like Figure 2 、 Figure 3 and Figure 9 As shown, the bracket structure 20 also includes a supporting wall beam 24, which is arranged on the wall surface of the accommodating cavity 11 and extends along the length direction of the sheet metal stamping box 10. The supporting wall beam 24 has a supporting step 241; there are two supporting wall beams 24, and the two supporting wall beams 24 are arranged opposite to each other, and the two sides of the width direction of the liquid cooling plate 30 are respectively bonded to the two supporting steps 241. In this way, while the multiple supporting cross beams 22 and at least one supporting longitudinal beam 23 in the above-mentioned bracket structure 20, and the buffer foam 40 in each sub-area provide support for the liquid cooling plate 30 at the same time, the supporting wall beam 24 is further provided, so that the supporting wall beam 24 is provided on the cavity wall surface of the accommodating cavity 11 and extends along the length direction of the sheet metal stamping box 10. The supporting wall beam 24 has a supporting step 241. The supporting step 241 serves to connect the narrower areas on both sides of the width direction of the liquid cooling plate 30 by bonding. On the one hand, it prevents the liquid cooling plate 30 from warping on both sides in the width direction. On the other hand, it can also ensure that the liquid cooling plate 30 is effectively supported, thereby ensuring the support reliability of the liquid cooling plate 30.

[0049] like Figure 9As shown, each supporting step 241 is provided with a structural adhesive 25 , and both sides of the liquid cooling plate 30 in the width direction are respectively bonded to the two supporting steps 241 by the structural adhesive 25 .

[0050] like Figures 2 to 4 As shown, the support convex bulge includes a first support convex bulge 221; a plurality of first support convex bulges 221 are provided on the support beam 22, and the plurality of first support convex bulges 221 are spaced apart along the length direction of the support beam 22, and the liquid cooling plate 30 has a plurality of first limiting through-holes 31, and the plurality of first limiting through-holes 31 are arranged one-to-one with the plurality of first support convex bulges 221, and each first support convex bulge 221 passes through each first limiting through-hole 31 and protrudes from the side of the liquid cooling plate 30 away from the bottom surface of the accommodating cavity 11 On the surface, the first supporting bulge 221 has a first assembly hole 2211; the expansion support beam also includes a transverse expansion beam 60, the transverse expansion beam 60 has a plurality of second assembly holes 61, and the plurality of second assembly holes 61 are arranged one-to-one corresponding to the plurality of first assembly holes 2211; a plurality of first fasteners, the plurality of first fasteners correspond one-to-one to the plurality of second assembly holes 61, and each first fastener passes through the second assembly hole 61 and the first assembly hole 2211 in sequence to connect the transverse expansion beam 60 and the supporting beam 22. In this way, by providing a plurality of first supporting convex bumps 221 on the supporting crossbeam 22, and at the same time, the plurality of first supporting convex bumps 221 are spaced apart along the length direction of the supporting crossbeam 22, the liquid cooling plate 30 has a plurality of first limiting through-holes 31, and the plurality of first limiting through-holes 31 are provided in a one-to-one correspondence with the plurality of first supporting convex bumps 221, and each first supporting convex bump 221 passes through each first limiting through-hole 31 and protrudes from the side surface of the liquid cooling plate 30 away from the bottom surface of the cavity 11. When the lateral expansion beam 60 of the battery pack is subsequently installed, each first fastener can be passed through the second mounting hole in sequence. The matching hole 61 and the first assembly hole 2211 are formed to achieve the purpose of connecting the transverse expansion beam 60 and the supporting beam 22, thereby ensuring the installation reliability of the transverse expansion beam 60. In addition, since each first supporting protrusion 221 passes through each first limiting through-hole 31 and protrudes from the side surface of the liquid cooling plate 30 away from the bottom surface of the cavity 11, a gap is set between the transverse expansion beam 60 and the liquid cooling plate 30 to prevent the transverse expansion beam 60 from directly making hard contact with the liquid cooling plate 30, thereby ensuring the structural integrity of the transverse expansion beam 60 and the overall structural integrity of the liquid cooling plate 30.

[0051] like Figure 2 、 Figure 3 、 Figure 6 and Figure 8As shown, the support structure 20 also includes a support wall beam 24, which is arranged on the cavity wall surface of the accommodating cavity 11 and extends along the length direction of the sheet metal stamping box 10. The support wall beam 24 has a support step 241. The support wall beam 24 is also provided with a fixed bracket 70. The two fixed brackets 70 arranged opposite to each other on the two support wall beams 24 are respectively connected to the two ends of the length direction of the transverse expansion beam 60 to provide support for the transverse expansion beam 60. In this way, by providing the fixed bracket 70 on the support wall beam 24, and at the same time, the two fixed brackets 70 arranged opposite to each other on the two support wall beams 24 are respectively connected to the two ends of the length direction of the transverse expansion beam 60, it is ensured that the two fixed brackets 70 can provide stable and reliable support for the transverse expansion beam 60, thereby ensuring the stability of the installation of the transverse expansion beam 60.

[0052] like Figures 2 to 4As shown, the support bulge includes a second support bulge 231; a plurality of second support bulges 231 are provided on the support longitudinal beam 23, and the plurality of second support bulges 231 are spaced apart along the length direction of the support longitudinal beam 23; the liquid cooling plate 30 has a plurality of second limiting through-holes 32, and the plurality of second limiting through-holes 32 are arranged one-to-one with the plurality of second support bulges 231, and each second support bulge 231 passes through each second limiting through-hole 32 and protrudes from the surface of the liquid cooling plate 30 away from the bottom surface of the accommodating cavity 11, and the second support bulge 231 has a third assembly hole 2311; the expansion support beam also includes a longitudinal expansion beam 80, and the longitudinal expansion beam 80 has a plurality of fourth assembly holes 81, and the plurality of fourth assembly holes 81 are arranged one-to-one with the plurality of third assembly holes 2311; a plurality of second fasteners, the plurality of second fasteners correspond one-to-one with the plurality of fourth assembly holes 81, and each second fastener passes through the fourth assembly hole 81 and the third assembly hole 2311 in sequence to connect the longitudinal expansion beam 80 and the support longitudinal beam 23. In this way, by providing a plurality of second supporting convex bumps 231 on the supporting longitudinal beam 23, and at the same time, the plurality of second supporting convex bumps 231 are spaced apart along the length direction of the supporting longitudinal beam 23, the liquid cooling plate 30 has a plurality of second limiting through-holes 32, and the plurality of second limiting through-holes 32 are provided in a one-to-one correspondence with the plurality of second supporting convex bumps 231, and each second supporting convex bump 231 passes through each second limiting through-hole 32 and protrudes from the surface of the liquid cooling plate 30 on the side away from the bottom surface of the accommodating cavity 11. When the longitudinal expansion beam 80 of the battery pack is subsequently installed, each second fastener can be sequentially passed through the fourth mounting hole 32. The matching hole 81 and the third assembly hole 2311 are formed to achieve the purpose of connecting the longitudinal expansion beam 80 and the supporting longitudinal beam 23, thereby ensuring the installation stability of the longitudinal expansion beam 80. In addition, since each second supporting protrusion 231 passes through each second limiting through-hole 32 and protrudes from the surface of the liquid cooling plate 30 on the side away from the bottom surface of the accommodating cavity 11, a gap is set between the longitudinal expansion beam 80 and the liquid cooling plate 30 to prevent the longitudinal expansion beam 80 from directly making hard contact with the liquid cooling plate 30, thereby ensuring the structural integrity of the longitudinal expansion beam 80 and the overall structural integrity of the liquid cooling plate 30.

[0053] By applying the technical solution of the present invention, a battery pack having a bracket structure 20 and an expansion support beam is provided. By arranging the bracket structure 20 on the bottom surface of the accommodating cavity 11 of the sheet metal stamping box 10 of the battery pack, while improving the overall structural strength of the sheet metal stamping box 10, the arrangement of the bracket structure 20 also plays an effective supporting role for the liquid cooling plate 30, thereby ensuring the installation stability of the liquid cooling plate 30; in addition, a supporting bulge is provided on the surface of the bracket structure 20 facing the liquid cooling plate 30, and the supporting bulge is arranged away from the liquid cooling plate and protrudes from the surface of the side of the liquid cooling plate away from the bracket structure 20, and the expansion support beam support is arranged on the supporting bulge, so that there is a gap between the expansion support beam and the liquid cooling plate 30. In the process of heat dissipation of the liquid cooling plate 30, heat will not be transferred to the expansion support beam, thereby effectively preventing heat from being transferred to the bracket structure 20.

[0054] Considering that the sheet metal stamping box 10 needs to undergo electrophoresis, baking and other process treatments, after the sheet metal stamping box 10 completes the required electrophoresis, baking and other process treatments, the liquid cooling plate 30 can be installed in the accommodating cavity 11 of the sheet metal stamping box 10 through the bracket structure 20, ensuring that the liquid cooling plate 30 provided in this application can provide effective heat dissipation for the battery cell 100 of the battery pack, thereby ensuring that the battery cell 100 can operate normally under suitable ambient temperature conditions, ensuring the service life of the battery pack, and then ensuring the energy storage reliability of the energy storage system, and further ensuring the power safety of electrical equipment.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0059] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery pack, characterized in that: include: A sheet metal stamping box (10), wherein the sheet metal stamping box (10) has a receiving cavity (11); a support structure (20), the support structure (20) being arranged on the bottom surface of the accommodating cavity (11); a liquid cooling plate (30), the liquid cooling plate (30) being supported on the support structure (20) and being detachably connected to the support structure (20); The support structure (20) has a support convex bump on the surface of the side facing the liquid cooling plate (30), and the support convex bump is arranged away from the liquid cooling plate (30) and protrudes from the surface of the side of the liquid cooling plate (30) facing away from the support structure (20); The battery pack further includes: An expansion support beam is supported on the support convex bump so that a gap exists between the expansion support beam and the liquid cooling plate (30).

2. The battery pack according to claim 1, wherein: The support structure (20) further has an avoidance groove (21) on the surface of the side facing the liquid cooling plate (30), and the avoidance groove (21) is used to avoid the liquid cooling channel on the liquid cooling plate (30).

3. The battery pack according to claim 1, wherein: The support structure (20) includes a plurality of supporting cross beams (22) and at least one supporting longitudinal beam (23), wherein the plurality of supporting cross beams (22) are arranged at intervals along the length direction of the sheet metal stamping box (10), and the supporting longitudinal beam (23) extends along the length direction of the sheet metal stamping box (10) and passes through each of the supporting cross beams (22).

4. The battery pack according to claim 3, wherein: The plurality of supporting cross beams (22) and at least one supporting longitudinal beam (23) divide the bottom surface of the accommodating cavity (11) into a plurality of sub-areas, and at least one layer of buffer foam (40) is provided in each of the sub-areas.

5. The battery pack according to claim 3, wherein: The liquid cooling plate (30) is connected to the supporting beam (22) via blind rivets (50); and / or, The liquid cooling plate (30) is connected to the supporting longitudinal beam (23) via blind rivets (50).

6. The battery pack according to claim 3, characterized in that: The support structure (20) further comprises: A supporting wall beam (24), the supporting wall beam (24) being arranged on a cavity wall surface of the accommodating cavity (11) and extending along a length direction of the sheet metal stamping box (10), the supporting wall beam (24) having a supporting step (241); There are two supporting wall beams (24), and the two supporting wall beams (24) are arranged opposite to each other. Both sides of the liquid cooling plate (30) in the width direction are respectively bonded and connected to the two supporting steps (241).

7. The battery pack according to claim 3, characterized in that: The supporting convex hull includes a first supporting convex hull (221); A plurality of first supporting convex bumps (221) are provided on the supporting crossbeam (22), and the plurality of first supporting convex bumps (221) are spaced apart along the length direction of the supporting crossbeam (22); the liquid cooling plate (30) has a plurality of first limiting through holes (31), and the plurality of first limiting through holes (31) are arranged in a one-to-one correspondence with the plurality of first supporting convex bumps (221), and each of the first supporting convex bumps (221) passes through each of the first limiting through holes (31) and protrudes from a side surface of the liquid cooling plate (30) away from the bottom surface of the accommodating cavity (11); the first supporting convex bump (221) has a first assembly hole (2211).

8. The battery pack according to claim 7, characterized in that: The expansion support beam comprises: A transverse expansion beam (60), wherein the transverse expansion beam (60) has a plurality of second assembly holes (61), and the plurality of second assembly holes (61) are arranged in a one-to-one correspondence with the plurality of first assembly holes (2211); A plurality of first fasteners are provided, wherein the plurality of first fasteners correspond to the plurality of second assembly holes (61) one by one, and each of the first fasteners passes through the second assembly hole (61) and the first assembly hole (2211) in sequence to connect the transverse expansion beam (60) and the supporting beam (22).

9. The battery pack according to claim 8, characterized in that: The support structure (20) further comprises: A supporting wall beam (24), the supporting wall beam (24) being arranged on a cavity wall surface of the accommodating cavity (11) and extending along a length direction of the sheet metal stamping box (10), the supporting wall beam (24) having a supporting step (241); The support wall beam (24) is further provided with a fixing bracket (70), and two fixing brackets (70) arranged opposite to each other on the two support wall beams (24) are respectively connected to the two ends of the transverse expansion beam (60) in the length direction.

10. The battery pack according to claim 3, wherein: The supporting convex hull includes a second supporting convex hull (231); A plurality of second supporting convex bumps (231) are provided on the supporting longitudinal beam (23), and the plurality of second supporting convex bumps (231) are spaced apart along the length direction of the supporting longitudinal beam (23); the liquid cooling plate (30) has a plurality of second limiting through holes (32), and the plurality of second limiting through holes (32) are arranged in a one-to-one correspondence with the plurality of second supporting convex bumps (231), and each second supporting convex bump (231) passes through each second limiting through hole (32) and protrudes from the surface of the liquid cooling plate (30) on the side away from the bottom surface of the accommodating cavity (11); the second supporting convex bump (231) has a third assembly hole (2311).

11. The battery pack according to claim 10, characterized in that: The expansion support beam further comprises: A longitudinal expansion beam (80), the longitudinal expansion beam (80) having a plurality of fourth assembly holes (81), the plurality of fourth assembly holes (81) being arranged in a one-to-one correspondence with the plurality of third assembly holes (2311); A plurality of second fasteners are provided, wherein the plurality of second fasteners correspond one-to-one to the plurality of fourth assembly holes (81), and each second fastener passes through the fourth assembly hole (81) and the third assembly hole (2311) in sequence to connect the longitudinal expansion beam (80) and the supporting longitudinal beam (23).

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