Cold plate assembly, battery pack supporting structure, battery pack, and electric device

Abstract

The present application provides a cold plate assembly, a battery pack supporting structure, a battery pack, and an electric device. The battery pack comprises a cross beam and a tray, the cross beam is arranged in the tray and used for dividing an accommodating cavity, an adhesive dispensing groove extending in the length direction of the cross beam is formed on the cross beam. The cold plate assembly comprises a cold plate and a partition plate. The cold plate comprises a connecting surface facing the cross beam. The partition plate is connected to the connecting surface, is configured to extend into the adhesive dispensing groove, and is adapted to extend in the length direction of the cross beam. The partition plate extends into the adhesive dispensing groove of the cross beam, so that on the one hand, the bonding area of an bonding adhesive can be increased, thereby enhancing the bonding strength of the bonding adhesive between the cold plate assembly and the cross beam; and on the other hand, in the event of thermal runaway in a single chamber of the battery pack, even if the bonding adhesive fails and causes the cold plate to bulge upward, the displacement of the partition plate can still ensure the independence of two isolated chambers in the battery pack, thereby preventing electrolyte flow between the two chambers, and avoiding more serious safety accidents.

Description

Cold plate assembly, battery pack support structure, battery pack and electrical equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202420845717.5, filed on April 22, 2024, entitled "Cold Plate Assembly, Battery Pack Support Structure, Battery Pack and Electrical Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery structure technology, specifically to a cold plate assembly, a battery pack support structure, a battery pack, and an electrical device. Background Technology

[0004] With the development of technology and the increasing awareness of environmental protection, the popularity of electric vehicles is growing. As the main power component of electric vehicles, the battery pack plays a crucial role in the long-term stable operation of electric vehicles.

[0005] To increase their capacity, existing battery packs typically employ a multi-cell stacking design. Furthermore, to enhance the structural strength and safety of the battery pack, a partition beam is added in the middle of the pack's housing cavity to improve structural strength and prevent interference between the cells on both sides.

[0006] However, when thermal runaway occurs in a single cavity of the battery pack, a large amount of gas is generated inside the battery pack, and the gas temperature is high. Under high temperature conditions, the gas pressure inside the cavity increases, causing the cold plate of the battery pack to bulge. Gaps will appear between the cold plate and the partition beam, causing the partition beam to fail. The electrolyte from the cell will flow into the undiffused cavity, causing arcing and fire in the rear cavity, seriously affecting the safe use of the battery pack.

[0007] Application content

[0008] The purpose of this application is to provide a cold plate assembly, a battery pack support structure, a battery pack, and electrical equipment to solve the problem of electrolyte diffusion affecting safety due to thermal runaway in the internal chamber of the battery pack.

[0009] To achieve the objectives of this application, the following technical solution is provided:

[0010] In a first aspect, this application provides a cold plate assembly for a battery pack, the battery pack including a crossbeam and a tray, the crossbeam being placed in the tray to separate receiving cavities in the tray, the crossbeam having a glue-applying groove extending along its length direction, the cold plate assembly including a cold plate and a partition; the cold plate including a connecting surface facing the crossbeam; the partition being connected to the connecting surface, the partition being for extending into the glue-applying groove, and the partition being adapted to extend along the length direction of the crossbeam.

[0011] In one embodiment, the partition includes a connecting section and a supporting section connected at an angle, the connecting section connecting to the connecting surface, and the supporting section extending into the glue-applying groove.

[0012] In one embodiment, the cold plate assembly further includes an insulating film connected to the connecting surface, and the partition is connected to the insulating film.

[0013] In one embodiment, the cold plate and the partition are an integral structure.

[0014] In one embodiment, the height of the partition protruding from the connecting surface is greater than or equal to 13 mm.

[0015] Secondly, this application provides a battery pack support structure, the battery pack support structure including a crossbeam and a cold plate assembly as described in the first aspect, the crossbeam being connected to the connecting surface, the crossbeam having a glue-applying groove on one side facing the connecting surface, the glue-applying groove being used to fill adhesive, and the partition extending into the glue-applying groove and connecting with the adhesive.

[0016] In one embodiment, the inner wall surface of the glue dispensing groove has a protrusion that extends toward the partition and is spaced apart from the partition.

[0017] In one embodiment, the glue-applying groove includes a first wall and a second wall facing each other, and the protrusion includes a first protrusion and a second protrusion. The first protrusion is disposed on the first wall, and the second protrusion is disposed on the second wall, with a gap between the first protrusion and the second protrusion.

[0018] In one embodiment, in the thickness direction of the crossbeam, the crossbeam includes a first segment and a second segment arranged at relative intervals, and a third segment and a fourth segment arranged at relative intervals; along the height direction of the crossbeam, the first segment and the third segment are connected in sequence, and the second segment and the fourth segment are connected in sequence, with the first segment and the second segment located at the end of the crossbeam away from the bottom plate of the tray; the glue-applying groove includes a shallow groove and a cavity, the gap between the first segment and the second segment is the shallow groove, the gap between the third segment and the fourth segment is the cavity, and the first protrusion and the second protrusion are arranged opposite to each other in the thickness direction of the crossbeam.

[0019] In one embodiment, the interval D1 between the first segment and the second segment is greater than the interval D2 between the third segment and the fourth segment.

[0020] In one embodiment, the first protrusion and the second protrusion have a chamfer on the side facing the connecting surface.

[0021] In one embodiment, the bottom wall of the glue-applying groove and the partition are spaced apart.

[0022] In one embodiment, the battery pack support structure further includes a tray that encloses a receiving cavity, and a crossbeam that connects to the bottom plate of the tray and divides the receiving cavity into a first receiving cavity and a second receiving cavity.

[0023] In one embodiment, the crossbeam includes a crossbeam body and a connecting pipe. The crossbeam body is connected to the bottom plate of the tray, and the connecting pipe is connected to the connecting surface. The crossbeam body is inserted into the connecting pipe.

[0024] Thirdly, this application provides a battery pack, including a battery cell and a battery pack support structure as described in the second aspect, wherein the battery cell is housed in the battery pack support structure.

[0025] Fourthly, this application provides an electrical device, including an electrical appliance and a battery pack as described in the third aspect, wherein the battery pack supplies power to the electrical appliance.

[0026] The cold plate assembly provided in this application is used in a battery pack and is mainly used to connect with the crossbeam of the battery pack. By extending the separator into the adhesive groove of the crossbeam, the bonding area of ​​the adhesive can be increased, thereby improving the strength of the adhesive bonding the cold plate assembly and the crossbeam. On the other hand, in the event of thermal runaway in a single cavity of the battery pack, even if the adhesive fails and causes the cold plate to bulge upward, the displacement of the separator can still ensure the independence of the two isolation chambers in the battery pack, thereby preventing the electrolyte from flowing between the two chambers and avoiding a greater safety accident. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 is an external view of a battery pack according to one embodiment;

[0029] Figure 2 is a structural diagram of the pallet, beam, and cold plate assembly according to one embodiment;

[0030] Figure 3 is a cross-sectional view of the partition and beam after installation in one embodiment;

[0031] Figure 4 is a structural diagram and a partial method diagram of a cold plate assembly according to one embodiment;

[0032] Figure 5 is a structural diagram of a cold plate assembly according to another embodiment;

[0033] Figure 6 is a cross-sectional view of the connecting pipe according to one embodiment;

[0034] Figure 7 is a partial cross-sectional view of the connecting pipe in one embodiment;

[0035] Figure 8 is a structural diagram of the connecting pipe in one embodiment.

[0036] Explanation of reference numerals in the attached drawings: 100-Battery pack; 10-Tray; 11-First receiving cavity; 12-Second receiving cavity; 20-Crossbeam; 21-Glue groove; 211-First wall surface; 212-Second wall surface; 213-Protrusion; 213A-First protrusion; 213B-Second protrusion; 22-Crossbeam body; 23-Connecting pipe; 231-Slot; 232-Cavity; 233-Shallow groove; 23A-Upper connecting section; 23B-Lower connecting section; 214A-First section; 214B-Second section; 215A-Third section; 215B-Fourth section; 30-Cold plate assembly; 31-Cold plate; 311-Connecting surface; 32-Baffle; 321-Connecting section; 322-Supporting section; 33-Insulating film; 40-Long aluminum strip; X-Length direction; Y-Width direction; Z-Thickness direction. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] This application provides a battery pack 100. Referring to Figures 1 and 2, the battery pack 100 includes battery cells and a battery pack support structure, with the battery cells housed within the support structure. The support structure includes a tray 10, a crossbeam 20, and a cold plate assembly 30. The tray 10 encloses a receiving cavity, and the crossbeam 20 is disposed within the receiving cavity and connected to the bottom plate of the tray 10. The crossbeam 20 divides the receiving cavity, forming a first receiving cavity 11 and a second receiving cavity 12, both of which are used to house battery cells. The cold plate assembly 30 covers the battery cells and is disposed opposite to the bottom plate of the tray 10. The side of the crossbeam 20 facing away from the bottom plate of the tray 10 is connected to the cold plate assembly 30. Optionally, the battery pack 100 includes a length direction X, a width direction Y, and a thickness direction Z. The first receiving cavity 11 and the second receiving cavity 12 are arranged horizontally along the length direction X; the thickness direction Z represents the height of the battery pack 100, and the cold plate assembly 30 and the bottom plate of the tray 10 are disposed opposite each other in the thickness direction.

[0042] In other embodiments, the first receiving cavity 11 and the second receiving cavity 12 can also be used to house different electrical components. For example, the first receiving cavity 11 is used to house the battery cell, and the second receiving cavity is used to house the electronic control assembly connected to the battery cell.

[0043] Optionally, the volumes of the first receiving cavity 11 and the second receiving cavity 12 may be the same or different; when the two receiving cavities are the same, both the first receiving cavity 11 and the second receiving cavity 12 can be used to place battery cells of the same volume; when the two receiving cavities are different, the first receiving cavity 11 holds the battery cells, and the second receiving cavity 12 holds the electronic control components connected to the battery cells.

[0044] Optionally, there can be multiple crossbeams 20, which are arranged sequentially at intervals along the length X of the battery pack 100. Therefore, multiple crossbeams 20 can divide the battery pack's receiving cavity into multiple chambers (e.g., including a first receiving cavity 11, a second receiving cavity 12, a third receiving cavity, etc.).

[0045] In one embodiment, referring to Figure 3, a glue-applying groove 21 is provided on the side of the crossbeam 20 facing the cold plate assembly 30. The glue-applying groove 21 is used to pour adhesive to connect the cold plate assembly 30 and the crossbeam 20, thereby ensuring that the first receiving cavity 11 and the second receiving cavity 12 are separated. The glue-applying groove 21 extends along the length direction of the crossbeam 20. It should be explained that the length direction of the crossbeam 20 is the width direction Y of the battery pack 100 (as shown in Figure 1).

[0046] By providing an adhesive groove 21 on the side of the crossbeam 20 facing the assembly, the cold plate assembly 30 is connected by adhesive to ensure the firmness of the cold plate assembly 30 in the battery pack 100; and the adhesive can completely isolate the first receiving cavity 11 and the second receiving cavity 12, preventing the first receiving cavity 11 and the second receiving cavity 12 from communicating.

[0047] In one embodiment, referring to Figures 3 and 4, the cold plate assembly 30 includes a cold plate 31 and a partition 32, wherein the cold plate 31 includes a connecting surface 311 facing the crossbeam 20, the partition 32 is connected to the connecting surface 311, the partition 32 is used to extend into the glue groove 21 of the crossbeam 20, and the partition 32 is adapted to extend along the length direction of the crossbeam 20.

[0048] Specifically, the cold plate 31 is a heat exchange plate for introducing a cooling medium, used to remove the heat generated during the operation of the battery cell. The connecting surface 311 of the cold plate 31 faces the bottom plate of the aforementioned tray 10. The crossbeam 20 is connected to the connecting surface 311, and the opening of the aforementioned adhesive groove 21 also faces the connecting surface 311. It can be understood that during the assembly process of the battery pack 100, adhesive can be injected into the adhesive groove 21 first, and then the cold plate 31 can be placed on the crossbeam 20. After the adhesive has solidified, the two can be joined together.

[0049] The separator 32 is vertically mounted on the connecting surface 311 of the cold plate 31, and after the cold plate 31 and the crossbeam 20 are assembled, the separator 32 extends into the adhesive groove 21. The separator 32 extends along the length of the crossbeam 20, and the length of the separator 32 should not exceed the length of the adhesive groove 21, and the height of the separator 32 should not exceed the depth of the adhesive groove 21, so that the separator 32 can extend into the adhesive groove 21 without interference. During the assembly of the battery pack 100, the cold plate 31 is placed on the crossbeam 20, and the separator 32 extends into the adhesive groove 21 and is connected with the adhesive.

[0050] Understandably, when thermal runaway occurs in the first or second cavity, the gas temperature rises, causing the adhesive to fail. The cold plate 31 bulges under pressure, and the gap that originally appeared between the cold plate 31 and the crossbeam 20 is blocked by the separator 32, allowing the first and second cavities to remain separated. Of course, to ensure that the separator 32 can extend into the adhesive groove 21, and that the height of the separator 32 should be greater than its displacement after the battery pack 100 bulges, the groove depth of the adhesive groove 21 provided in this application can be greater than that of the adhesive groove 21 in the prior art.

[0051] The cold plate assembly 30 provided in this application is used in the battery pack 100 and is mainly used to connect with the crossbeam 20 of the battery pack 100. By extending the separator 32 into the adhesive groove 21 of the crossbeam 20, the bonding area of ​​the adhesive can be increased, thereby improving the strength of the adhesive bonding the cold plate assembly 30 and the crossbeam 20. On the other hand, in the event of thermal runaway in a single cavity of the battery pack 100, even if the adhesive fails and causes the cold plate 31 to bulge upwards, the displacement of the separator 32 can still ensure the independence of the two isolation chambers in the battery pack 100, thereby preventing the electrolyte from flowing between the two chambers and avoiding a greater safety accident.

[0052] In one embodiment, referring to FIG3, the partition 32 includes a connecting section 321 and a support section 322 connected at an angle. The connecting section 321 is connected to the connecting surface 311, and the support section 322 is used to extend into the glue-applying groove 21.

[0053] Specifically, the partition 32 can be an "L" shaped structure, that is, the cross-section of the partition 32 is similar to an "L". The partition 32 includes a connecting section 321 and a supporting section 322. The connecting section 321 is connected to the connecting surface 311, and the supporting section 322 stands on the cold plate 31 and extends into the glue-applying groove 21.

[0054] Optionally, in specific embodiments, the partition 32 and the cold plate 31 can be connected by welding, gluing, snap-fitting, screwing, etc., and there are no specific limitations.

[0055] By setting the partition 32 to include a connecting section 321 and a supporting section 322 connected at an angle, the partition 32 and the cold plate 31 have a larger connection area 311, thereby improving the connection strength of the partition 32 and the cold plate 31; moreover, the manufacturing process of the "L"-shaped partition 32 is simple and can reduce the process cost.

[0056] In one embodiment, referring to FIG4, the cold plate assembly 30 further includes an insulating film 33, which is connected to the connecting surface 311, and the partition 32 is connected to the insulating film 33.

[0057] Specifically, an insulating film 33 is provided between the cold plate 31 and the partition 32. The insulating film 33 is used to block the cold plate 31 and the partition 32 to prevent leakage between them. Based on the above embodiment, a connecting section 321 can be connected to the insulating film 33.

[0058] In one embodiment, referring to Figure 4, in the width direction Y of the battery pack, the size of the insulating film 33 is smaller than the size of the cold plate 31, and the size of the separator 32 is smaller than the size of the insulating film 33. Specifically, the length of the insulating film 33 can be greater than the length of the separator 32, thereby ensuring resistive isolation between the separator 32 and the cold plate 31 and preventing short circuits; secondly, it allows the length of the separator 32 to be adapted to the length of the adhesive groove 21, thereby preventing the ends of the separator 32 from protruding from the adhesive groove 21 and causing adhesive overflow.

[0059] In one embodiment, referring to Figure 5, the cold plate 31 and the partition 32 are an integral structure. Specifically, the cold plate 31 and the partition 32 can also be an integral structure, that is, the cold plate assembly 30 is integrally formed by a stamping process. It should be explained that the partition 32 is not necessarily flat. In specific embodiments, the partition 32 can be a long strip structure protruding on the cold plate 31, or it can be a pointed shape; the purpose of setting the partition 32 is to extend into the glue groove 21 to achieve complete barrier.

[0060] By setting the cold plate 31 and the partition plate 32 as an integrated structure, the modification of the crossbeam 20 can be reduced. The battery pack 100 can be modified by utilizing the existing crossbeam 20 and the glue-applying groove 21, which can reduce the manufacturing cost of the battery pack 100.

[0061] Optionally, if the cold plate 31 and the partition 32 are an integral structure, an insulating layer can be provided on the surface of the partition 32 to prevent leakage.

[0062] In one embodiment, the partition 32 protrudes from the connecting surface 311 by a height greater than or equal to 13 mm, and the length of the partition 32 is greater than or equal to 689 mm. It should be explained that, to ensure ease of installation and manufacturing of the partition 32, the height of the partition 32 is greater than the depth of the glue-applying groove in the prior art. The glue-applying groove 21 provided in this application has a depth adapted to the partition 32; that is, the depth of the glue-applying groove 21 provided in this application is not less than the depth of the glue-applying groove in the prior art. It should also be explained that the length of the partition 32 is the same as the length of the crossbeam 20.

[0063] In one embodiment, the separator 32 may extend linearly in the width direction Y of the battery pack 100 (as shown in Figure 4); or the separator 32 may extend in a curved manner in the width direction Y of the battery pack 100 (not shown in the figure). The effect of the curved extension is that it can increase the contact area between the separator 32 and the adhesive, thereby enhancing the bonding strength between the adhesive and the separator 32 during curing, and further improving the sealing performance.

[0064] In one embodiment, referring to FIG3, the inner wall surface of the glue dispensing groove 21 has a protrusion 213, the protrusion 213 extends toward the partition 32, and there is a gap between the protrusion 213 and the partition 32.

[0065] Specifically, the inner wall of the glue applicator 21 includes a bottom wall and a side wall, wherein the bottom wall is opposite to the connecting surface 311. The side wall is connected to the bottom wall and is opposite to the surface of the partition 32. The side wall of the glue applicator 21 has a protruding protrusion 213 that extends toward the partition 32.

[0066] Protrusions 213 are provided on the inner wall of the glue application tank 21. On the one hand, this increases the internal complexity of the glue application tank 21, thereby improving the adhesion of the adhesive to the inner wall of the glue application tank 21. On the other hand, it also increases the difficulty of the diffusion of the electrolyte in the battery cell.

[0067] In one embodiment, referring to Figures 3 and 6, the glue-applying groove 21 includes a first wall surface 211 and a second wall surface 212 opposite to each other, and the protrusion 213 includes a first protrusion 213A and a second protrusion 213B. The first protrusion 213A is disposed on the first wall surface 211, and the second protrusion 213B is disposed on the second wall surface 212. There is a gap between the first protrusion 213A and the second protrusion 213B.

[0068] Specifically, the sidewall of the glue dispensing groove 21 includes a first wall surface 211 and a second wall surface 212 opposite to each other in the width direction of the groove. The protrusion 213 includes a first protrusion 213A and a second protrusion 213B. The first protrusion 213A protrudes from the first wall surface 211 toward the direction close to the second wall surface 212, and the second protrusion 213B protrudes from the second wall surface 212 toward the direction close to the first wall surface 211. Optionally, the first protrusion 213A and the second protrusion 213B are arranged opposite to each other, and the partition 32 is located between the first protrusion 213A and the second protrusion 213B.

[0069] Understandably, the first protrusion 213A and the second protrusion 213B can increase the internal complexity of the glue-applying groove 21. On the one hand, they can improve the adhesion of the adhesive to the inner wall of the glue-applying groove 21, and on the other hand, they can increase the difficulty of the diffusion of the electrolyte in the battery cell.

[0070] In one embodiment, referring to Figures 3 and 6, the protrusion 213 and the partition 32 are spaced apart. Specifically, both the first protrusion 213A and the second protrusion 213B are spaced apart from the partition 32, allowing the adhesive to flow.

[0071] In one embodiment, referring to Figures 3 and 6, the top of the partition 32 is spaced apart from the bottom wall of the glue-applying groove 21. This allows the spaces on the two opposite sides of the two large surfaces of the partition 32 to be connected, facilitating glue application on one large surface of the partition 32.

[0072] In one embodiment, referring to Figures 3 and 6, the crossbeam 20 includes a crossbeam body 22 and a connecting pipe 23. The crossbeam body 22 is connected to the bottom plate of the tray 10, and the connecting pipe 23 is connected to the connecting surface 311. The crossbeam body 22 is inserted into the connecting pipe 23.

[0073] Specifically, the crossbeam 20 is assembled from two parts: the crossbeam body 22 and the connecting pipe 23. The crossbeam body 22 is connected to the bottom plate of the tray 10. The side of the connecting pipe 23 facing away from the cold plate 31 also has a slot 231, into which the crossbeam body 22 is inserted, thereby connecting the crossbeam body 22 and the connecting pipe 23.

[0074] Optionally, the connecting pipe 23 has a glue-applying groove 21 and a slot 231 as described in the above embodiment, wherein the glue-applying groove 21 and the slot 231 are respectively formed on two different surfaces of the connecting pipe 23. Both the glue-applying groove 21 and the slot 231 can be used to inject adhesive. The adhesive in the glue-applying groove 21 is used to connect the cold plate 31, and the adhesive in the slot 231 is used to connect the crossbeam body 22.

[0075] Optionally, the sides of the crossbeam body 22 and the connecting pipe 23 are also connected by bolts.

[0076] By setting the crossbeam 20 to consist of a separate crossbeam body 22 and a connecting pipe 23, it is convenient to produce and integrate battery pack parts separately, and the welding of the crossbeam body 22 and the tray separately can reduce the welding difficulty. On the other hand, the connecting pipe 23 can be designed separately to arrange other electrical connection devices inside the connecting pipe 23.

[0077] In one embodiment, referring to Figure 3, the height of the connecting pipe 23 is greater than the height of the crossbeam body 22. It is understood that the combination of the connecting pipe 23 and the crossbeam body 22 provided in this application involves inserting the crossbeam body 22 into the slot 231 opened in the connecting pipe 23, and the connecting pipe 23 should be as close as possible to the bottom plate of the tray 10. This serves two purposes: firstly, to increase the space of the receiving cavity, and secondly, to ensure the overall structural strength of the crossbeam 20, preventing the crossbeam body 22 from not being fully inserted into the slot 231, thereby ensuring the protection of the crossbeam body 22 by the connecting pipe 23.

[0078] In one embodiment, referring to Figures 3 and 6, the connecting pipe 23 is further provided with a plurality of cavities 232, wherein the plurality of cavities 232 are arranged sequentially along the thickness direction of the battery pack 100. The cavities 232 extend along the length direction of the connecting pipe 23 within the connecting pipe 23, and are used to install the long aluminum busbar 40.

[0079] In one embodiment, referring to FIG7, in the thickness direction of the crossbeam 20, the crossbeam 20 includes a first segment 214A and a second segment 214B arranged at intervals, and a third segment 215A and a fourth segment 215B arranged at intervals; in the height direction of the crossbeam 20, the first segment 214A and the third segment 215A are connected in sequence, and the second segment 214B and the fourth segment 215B are connected in sequence, with the first segment 214A and the second segment 214B located at the end of the crossbeam away from the bottom plate of the tray 10; the third segment 215A includes a first wall surface 211, and the fourth segment 215B includes a second wall surface 212; the glue groove 21 includes a shallow groove 233 and a cavity 232; the gap between the first segment 214A and the second segment 214B is the shallow groove 233, and the gap between the third segment 215A and the fourth segment 215B is the cavity 232; the first protrusion 213A and the second protrusion 213B are arranged opposite to each other in the thickness direction of the crossbeam 20.

[0080] Specifically, the glue application groove 21 consists of at least one cavity 232, and a shallow groove 233 is provided on the side of the connecting pipe 23 facing the connecting surface 311. The sheet metal between the shallow groove 233 and the cavity 232 is opened to form the glue application groove 21.

[0081] Therefore, it is understandable that, based on the above-described embodiment, the first protrusion 213A and the second protrusion 213B are the sheet metal that originally enclosed the cavity 232. By opening an opening in the sheet metal, the remaining sheet metal forms the first protrusion 213A and the second protrusion 213B, and a glue groove 21 is obtained. Due to the obstruction of the first protrusion 213A and the second protrusion 213B, the adhesive in the cavity 232 is also less likely to flow out from the shallow groove 233.

[0082] In one embodiment, the interval D1 between the first segment 214A and the second segment 214B is greater than the interval D2 between the third segment and the fourth segment.

[0083] Specifically, in the thickness direction of the connecting tube 23 (i.e., the length direction X of the battery pack), the distance D1 between the first segment 214A and the second segment 214B is the diameter of the shallow groove 233 mentioned above, and the distance D2 between the third and fourth segments is the diameter of the cavity 232 mentioned above. The advantage of this arrangement is that the adhesive is injected from the shallow groove 233, so a larger diameter of the shallow groove 233 (the distance D1 between the first segment 214A and the second segment 214B) makes it easier for the adhesive to be injected. Furthermore, due to the obstruction of the first protrusion 213A and the second protrusion 213B, the adhesive in the cavity 232 is less likely to flow out of the shallow groove 233.

[0084] In one embodiment, referring to FIG6, the first protrusion 213A and the second protrusion 213B have a chamfer on the side facing the connecting surface (as shown by the dashed circle A in FIG6). The purpose of providing this chamfer is, on the one hand, to make it easier for the adhesive to flow from the shallow groove 233 into the cavity 232, as the chamfer forms a drainage structure; on the other hand, the adhesive in the cavity 232 is not easy to flow out from the shallow groove 233 because the other side of the first protrusion 213A and the second protrusion 213B does not have a chamfer for drainage; furthermore, the chamfer can also provide installation guidance, facilitating the installation of the battery pack.

[0085] In one embodiment, referring to FIG8, the connecting pipe 23 includes an upper connecting section 23A and a lower connecting section 23B. In the thickness direction Z of the battery pack, the upper connecting section 23A and the lower connecting section 23B are connected vertically. The upper connecting section 23A is connected to the cold plate assembly 30, and the lower connecting section 23B is connected to the crossbeam body 22. Furthermore, the length of the upper connecting section 23A (in the width direction Y of the battery pack 100) is less than the length of the lower connecting section 23B.

[0086] Optionally, the upper connecting segment 23A and the lower connecting segment 23B are an integral structure. The upper connecting segment 23A has the aforementioned shallow groove 233 and at least one cavity 232, and the lower connecting segment 23B has the aforementioned slot 231 and at least one cavity 232. The opening formed in the upper connecting segment 23A is at the first protrusion 213A and the second protrusion 213B, and the opening is such that a cavity 232 and a shallow groove 233 communicate to form a glue-applying groove. Optionally, the shape and volume of the cavity in the upper connecting segment 23A are not entirely the same as the shape and volume of the cavity in the lower connecting segment 23B.

[0087] By setting the connecting pipe 23 to include an upper connecting section 23A and a lower connecting section 23B of different lengths, the notch formed by the upper connecting section 23A can be used to place other components, thereby avoiding interference during the installation of components in the battery pack.

[0088] In one embodiment, this application provides an electrical device, which includes an electrical appliance and a battery pack 100 as described in the above embodiment, and the electrical device and the battery pack 100 are electrically connected. In a specific embodiment, the electrical device can be a vehicle or an energy storage cabinet.

[0089] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship of the drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0090] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A cold plate assembly (30) for a battery pack (100), the battery pack (100) comprising a crossbeam (20) and a tray (10), characterized in that, The crossbeam (20) is placed in the tray (10) to separate the receiving cavity in the tray (10). The crossbeam (20) has a glue-applying groove (21) extending along its length. The cold plate assembly (30) includes: Cold plate (31), including a connecting surface (311) facing the crossbeam (20); A partition (32) is attached to the connecting surface (311), the partition (32) is used to extend into the glue-applying groove (21), and the partition (32) is adapted to extend along the length direction of the crossbeam (20).

2. The cold plate assembly (30) according to claim 1, characterized in that, The partition (32) includes a connecting section (321) and a support section (322) connected at an angle. The connecting section (321) connects to the connecting surface (311), and the support section (322) extends into the glue-applying groove (21).

3. The cold plate assembly (30) according to claim 1, characterized in that, The cold plate assembly (30) also includes an insulating film (33) connected to the connecting surface (311), and the partition (32) connected to the insulating film (33).

4. The cold plate assembly (30) according to claim 1, characterized in that, The cold plate (31) and the partition (32) are an integral structure.

5. The cold plate assembly (30) according to claim 1, characterized in that, The height of the partition (32) protruding from the connecting surface (311) is greater than or equal to 13 mm.

6. A battery pack support structure, characterized in that, The battery pack (100) support structure includes a crossbeam (20) and a cold plate assembly (30) as described in any one of claims 1-5. The crossbeam (20) has a glue-applying groove (21) on the side facing the connecting surface (311). The glue-applying groove (21) is used to fill adhesive. The partition plate (32) extends into the glue-applying groove (21) and is connected to the adhesive.

7. The battery pack support structure according to claim 6, characterized in that, The battery pack (100) support structure also includes a tray (10), which encloses the receiving cavity. The crossbeam (20) connects to the bottom plate of the tray (10) and divides the receiving cavity into a first receiving cavity (11) and a second receiving cavity (12).

8. The battery pack support structure according to claim 7, characterized in that, The crossbeam (20) includes a crossbeam (20) body and a connecting pipe (23). The crossbeam (20) body is connected to the bottom plate of the tray (10), and the connecting pipe (23) is connected to the connecting surface (311). The crossbeam (20) body is inserted into the connecting pipe (23).

9. The battery pack support structure according to claim 6, characterized in that, The inner wall surface of the glue-applying groove (21) has a protrusion (213) that extends toward the partition (32) and there is a gap between the protrusion (213) and the partition (32).

10. The battery pack support structure according to claim 9, characterized in that, The glue-applying groove (21) includes a first wall surface (211) and a second wall surface (212) facing each other. The protrusion (213) includes a first protrusion (213A) and a second protrusion (213B). The first protrusion (213A) is disposed on the first wall surface (211), and the second protrusion (213B) is disposed on the second wall surface (212). There is a gap between the first protrusion (213A) and the second protrusion (213B).

11. The battery pack support structure according to claim 10, characterized in that, In the thickness direction of the crossbeam (20), the crossbeam (20) includes a first segment (214A) and a second segment (214B) arranged at intervals, and a third segment (215A) and a fourth segment (215B) arranged at intervals; in the height direction of the crossbeam (20), the first segment (214A) and the third segment (215A) are connected in sequence, and the second segment (214B) and the fourth segment (215B) are connected in sequence, and the first segment (214A) and the second segment (214B) are located at the end of the crossbeam (20) away from the bottom plate of the tray (10); The glue-applying groove (21) includes a shallow groove (233) and a cavity (232). The gap between the first segment (214A) and the second segment (214B) is the shallow groove (233), and the gap between the third segment (215A) and the fourth segment (215B) is the cavity (232). The first protrusion (213A) and the second protrusion (213B) are arranged opposite to each other in the thickness direction of the crossbeam (20).

12. The battery pack support structure according to claim 11, characterized in that, The interval D1 between the first segment (214A) and the second segment (214B) is greater than the interval D2 between the third segment (215A) and the fourth segment (215B).

13. The battery pack support structure according to claim 10, characterized in that, The first protrusion (213A) and the second protrusion (213B) have a chamfer on the side facing the connecting surface (311).

14. The battery pack support structure according to claim 6, characterized in that, The bottom wall of the glue-applying groove (21) is spaced apart from the partition plate (32).

15. A battery pack (100), characterized in that, It includes a battery cell and a battery pack support structure as described in any one of claims 6-14, wherein the battery cell is housed in the battery pack support structure.

16. An electrical appliance, characterized in that, It includes an electrical appliance and a battery pack (100) as described in claim 15, the battery pack (100) supplying power to the electrical appliance.

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