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

Abstract

A cold plate assembly, a battery pack support 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 is used for separating an accommodating cavity, a gluing groove extending along the length direction of the cross beam is formed in the cross beam, and 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 face, used for extending into the gluing groove and suitable for extending in the length direction of the cross beam. The partition plates extend into the gluing grooves of the cross beams, on one hand, the bonding area of bonding glue can be increased, and therefore the strength of bonding the cold plate assembly and the cross beams through the bonding glue is improved; and on the other hand, when the single cavity of the battery pack is in thermal runaway, even if the cold plate moves upwards to swell due to the failure of the adhesive, the displacement of the partition plate can continuously ensure the independence of the two isolated cavities in the battery pack, so that the electrolyte is prevented from flowing between the two cavities, and greater safety accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery structures, and in particular to a cold plate assembly, a battery pack supporting structure, a battery pack and electrical equipment. Background Art

[0002] With the development of science and technology and the enhancement of environmental awareness, the popularity of electric vehicles is increasing. As the main power component of electric vehicles, battery packs play a key role in the long-term stable operation of electric vehicles.

[0003] In order to increase the capacity of existing battery packs, a multi-cell stacking design is adopted. In order to improve the structural strength and safety of the battery pack, a partition beam is added in the middle of the battery pack's receiving cavity to improve the structural strength and avoid mutual interference between the cells on both sides.

[0004] However, when a single cavity of a battery pack experiences thermal runaway, a large amount of gas is generated in the battery pack, and the gas temperature is high. Under high temperature conditions, the gas pressure in the cavity increases, causing the cold plate of the battery pack to bulge. A gap will appear between the cold plate and the partition beam, causing the partition beam to fail, and the electrolyte of the battery cell will flow into the undiffused cavity, causing arcing and fire in the rear cavity, which seriously affects the safe use of the battery pack. Utility Model Content

[0005] The utility model aims to provide a cold plate assembly, a battery pack support structure, a battery pack and an electrical device, so as to solve the problem that the thermal runaway of the internal cavity of the battery pack causes the diffusion of electrolyte and affects the safety.

[0006] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a cold plate assembly for a battery pack, the battery pack comprising a crossbeam and a tray, the crossbeam being placed in the tray for partitioning a receiving cavity, the crossbeam being provided with a glue groove extending along its length, the cold plate assembly comprising a cold plate and a partition; the cold plate comprising a connecting surface facing the crossbeam; the partition being connected to the connecting surface, the partition being used to extend into the glue groove, and the partition being suitable for extending along the length direction of the crossbeam.

[0008] In one embodiment, the partition includes a connecting section and a supporting section connected at an angle, the connecting section is connected to the connecting surface, and the supporting section is used to extend into the gluing groove.

[0009] In one embodiment, the cold plate assembly further comprises an insulating film, the insulating film is connected to the connecting surface, and the partition is connected to the insulating film.

[0010] In one embodiment, the cold plate and the partition are an integrated structure.

[0011] In one embodiment, the height of the partition protruding from the connecting surface is greater than or equal to 13 mm.

[0012] In the second aspect, the utility model provides a battery pack support structure, which includes a crossbeam and a cold plate assembly as described in the first aspect, wherein the crossbeam is connected to the connecting surface, and a glue groove is provided on the side of the crossbeam facing the connecting surface, wherein the glue groove is used to fill the adhesive, and the partition extends into the glue groove and is connected to the adhesive.

[0013] In one embodiment, a protrusion is provided on the inner wall surface of the glue applying groove, the protrusion extends in a direction close to the partition, and there is a spacing distance between the protrusion and the partition.

[0014] In one embodiment, the glue groove includes a first wall surface and a second wall surface opposite to each other, and the protrusion includes a first protrusion and a second protrusion, the first protrusion is arranged on the first wall surface, the second protrusion is arranged on the second wall surface, and there is a gap between the first protrusion and the second protrusion.

[0015] In one embodiment, in the thickness direction of the beam, the beam includes a first section and a second section that are relatively spaced apart, and a third section and a fourth section that are relatively spaced apart; along the height direction of the beam, the first section and the third section are connected in sequence, and the second section and the fourth section are connected in sequence, and the first section and the second section are located at an end of the beam away from the bottom plate of the pallet; the glue groove includes a shallow groove and a cavity, the gap between the first section and the second section is the shallow groove, the gap between the third section and the fourth section is the cavity, and the first protrusion and the second protrusion are relatively arranged in the thickness direction of the beam.

[0016] In one embodiment, a spacing distance D1 between the first segment and the second segment is greater than a spacing distance D2 between the third segment and the fourth segment.

[0017] In one embodiment, the first protrusion and the second protrusion have chamfers on a surface facing the connecting surface.

[0018] In one embodiment, the bottom wall of the glue applying groove is spaced apart from the partition.

[0019] In one embodiment, the battery pack support structure further includes a tray, the tray encloses a receiving cavity, the crossbeam connects a bottom plate of the tray and separates the receiving cavity into a first receiving cavity and a second receiving cavity.

[0020] In one embodiment, the crossbeam includes a crossbeam body and a connecting pipe, the crossbeam body is connected to the bottom plate of the pallet, the connecting pipe is connected to the connecting surface, and the crossbeam body is inserted into the connecting pipe.

[0021] In a third aspect, the utility model provides a battery pack, comprising a battery cell and a battery pack support structure as described in the second aspect, wherein the battery cell is accommodated in the battery pack support structure.

[0022] In a fourth aspect, the utility model provides an electrical device, including an electrical device and a battery pack as described in the third aspect, wherein the battery pack supplies power to the electrical device.

[0023] The cold plate assembly provided by the utility model is used in a battery pack and is mainly used to connect with the crossbeam of the battery pack. By extending the partition into the gluing groove of the crossbeam, on the one hand, the bonding area of ​​the adhesive can be increased, thereby increasing the strength of the adhesive bonding the cold plate assembly and the crossbeam; on the other hand, when a single cavity of the battery pack thermally runs away, even if the adhesive fails and causes the cold plate to move up and bulge, the displacement of the partition can continue to ensure the independence of the two isolation chambers in the battery pack, thereby preventing the electrolyte from flowing between the two chambers and avoiding causing greater safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is an appearance diagram of a battery pack according to an embodiment;

[0026] Figure 2 is a structural diagram of a tray, beam and cold plate assembly in one embodiment;

[0027] Figure 3 is a cross-sectional view of an embodiment after the partition and the cross beam are installed;

[0028] Figure 4 is a structural diagram and partial method diagram of a cold plate assembly of an embodiment;

[0029] Figure 5 is a structural diagram of a cold plate assembly according to another embodiment;

[0030] Figure 6 is a cross-sectional view of a connecting pipe in one embodiment;

[0031] Figure 7 is a partial cross-sectional view of a connecting pipe in one embodiment;

[0032] Figure 8 The present invention is an appearance structural diagram of a connecting pipe according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 100-battery pack;

[0035] 10-tray, 11-first receiving cavity, 12-second receiving cavity;

[0036] 20-crossbeam, 21-glue groove, 211-first wall, 212-second wall, 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;

[0037] 30-cold plate assembly, 31-cold plate, 311-connecting surface, 32-partition plate, 321-connecting section, 322-supporting section, 33-insulating film;

[0038] 40-long aluminum bar;

[0039] X-length direction, Y-width direction, Z-thickness direction. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] 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 there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0042] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0043] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0044] The utility model provides a battery pack 100, please refer to Figure 1 and Figure 2 The battery pack 100 includes a battery cell and a battery pack support structure, and the battery cell is accommodated in the battery pack support structure. The battery pack support structure includes a tray 10, a beam 20 and a cold plate assembly 30. Among them, the tray 10 encloses the receiving cavity, the beam 20 is arranged in the receiving cavity and connected to the bottom plate of the tray 10, and the beam 20 divides the receiving cavity into a first receiving cavity 11 and a second receiving cavity 12, and the first receiving cavity 11 and the second receiving cavity 12 are both used to place the battery cell. The cold plate assembly 30 is covered on the battery cell and arranged opposite to the bottom plate of the tray 10. The side of the beam 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. Among them, the first receiving cavity 11 and the second receiving cavity 12 are arranged left and right in the length direction X; the thickness direction Z is the height of the battery pack 100, and the cold plate assembly 30 and the bottom plate of the tray 10 are arranged opposite to each other in the thickness direction.

[0045] In other embodiments, the first receiving cavity 11 and the second receiving cavity 12 may also be used to place different electrical components. For example, the first receiving cavity 11 is used to place the battery core, and the second receiving cavity is used to place the electric control component connected to the battery core.

[0046] Optionally, the volumes of the first receiving chamber 11 and the second receiving chamber 12 may be the same or different; when the two receiving chambers are the same, the first receiving chamber 11 and the second receiving chamber 12 may both be used to place battery cells of the same volume; when the two receiving chambers are different, the first receiving chamber 11 is used to place the battery cells, and the second receiving chamber 12 is used to place electronic control components connected to the battery cells.

[0047] Optionally, there may be multiple cross beams 20, which are arranged in sequence along the length direction X of the battery pack 100. Therefore, the multiple cross beams 20 can divide the receiving cavity of the battery pack into multiple chambers (for example, including the first receiving cavity 11, the second receiving cavity 12, the third receiving cavity, etc.).

[0048] In one implementation, please refer to Figure 3 The cross beam 20 has a glue groove 21 on one side facing the cold plate assembly 30. The glue groove 21 is used to inject adhesive to connect the cold plate assembly 30 and the cross beam 20, thereby ensuring that the first receiving cavity 11 and the second receiving cavity 12 are separated. The glue groove 21 extends along the length direction of the cross beam 20 on the cross beam 20. It should be explained that the length direction of the cross beam 20 is the width direction Y of the battery pack 100 (such as Figure 1 as indicated).

[0049] By opening a glue groove 21 on one side of the cross beam 20 facing the assembly, the cold plate assembly 30 is connected using adhesive to ensure the firmness of the cold plate assembly 30 in the battery pack 100; and the first receiving cavity 11 and the second receiving cavity 12 can be completely isolated by the adhesive to prevent the first receiving cavity 11 and the second receiving cavity 12 from being connected.

[0050] In one implementation, please refer to Figure 3 and Figure 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 beam 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 beam 20, and the partition 32 is suitable for extending along the length direction of the beam 20.

[0051] Specifically, the cold plate 31 is a heat exchange plate for passing a cooling medium, and the cold plate 31 is used to exchange the heat generated when the battery cell is working. The connection surface 311 of the cold plate 31 faces the bottom plate of the above-mentioned middle tray 10. The crossbeam 20 is connected to the connection surface 311, and the opening of the above-mentioned middle glue groove 21 also faces the connection surface 311; it can be understood that during the assembly process of the battery pack 100, the adhesive can be injected into the glue groove 21 first, and then the cold plate 31 can be placed on the crossbeam 20, and the two can be connected together after the adhesive solidifies.

[0052] The partition 32 is vertically arranged on the connection surface 311 of the cold plate 31, and after the cold plate 31 and the cross beam 20 are assembled, the partition 32 extends into the glue groove 21. The partition 32 extends along the length direction of the cross beam 20, and the length of the partition 32 should not be greater than the length of the glue groove 21, and the height of the partition 32 should not be greater than the depth of the glue groove 21, so that the partition 32 can extend into the glue groove 21 without interference. During the assembly process of the battery pack 100, the cold plate 31 is placed on the cross beam 20, and the partition 32 extends into the glue groove 21 and is connected with the adhesive.

[0053] It is understandable that when thermal runaway occurs in the first cavity or the second cavity, the gas temperature rises and causes the adhesive to fail. The cold plate 31 bulges under the action of air pressure, and the gap between the cold plate 31 and the beam 20 is blocked by the partition 32, so that the first cavity and the second cavity can continue to be separated. Of course, in order to allow the partition 32 to extend into the glue groove 21, and after the battery pack 100 bulges, the height of the partition 32 should be greater than the displacement of the partition 32, so the depth of the glue groove 21 provided by the utility model can be greater than the glue groove 21 in the prior art.

[0054] The cold plate assembly 30 provided by the utility model is used in the battery pack 100, and is mainly used to connect with the cross beam 20 of the battery pack 100. By extending the partition 32 into the glue groove 21 of the cross beam 20, on the one hand, the bonding area of ​​the adhesive can be increased, thereby improving the strength of the adhesive bonding the cold plate assembly 30 and the cross beam 20; on the other hand, when a single cavity of the battery pack 100 has thermal runaway, even if the adhesive fails and causes the cold plate 31 to move up and bulge, the displacement of the partition 32 can continue to 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 causing greater safety accidents.

[0055] In one implementation, please refer to Figure 3 The partition 32 includes a connecting section 321 and a supporting section 322 connected at an angle, the connecting section 321 is connected to the connecting surface 311 , and the supporting section 322 is used to extend into the glue groove 21 .

[0056] Specifically, the partition 32 may be an "L"-shaped structure, that is, the cross section of the partition 32 is similar to an "L" shape. 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 upright on the cold plate 31 and extends into the glue groove 21.

[0057] Optionally, in a specific implementation, the partition 32 and the cold plate 31 may be welded, glued, clamped, screwed, etc., without specific limitation.

[0058] By arranging the partition 32 to include a connecting section 321 and a supporting section 322 connected at an angle, a larger connecting surface 311 area is provided between the partition 32 and the cold plate 31, thereby improving the connection strength of the partition 32 to the cold plate 31; moreover, the manufacturing process of the "L"-shaped partition 32 is simple, which can reduce the process cost.

[0059] In one implementation, please refer to Figure 4 The cold plate assembly 30 further includes an insulating film 33 , the insulating film 33 is connected to the connecting surface 311 , and the partition plate 32 is connected to the insulating film 33 .

[0060] Specifically, an insulating film 33 is provided between the cold plate 31 and the partition 32, and the insulating film 33 is used to block the cold plate 31 and the partition 32 to prevent leakage between the cold plate 31 and the partition 32. Based on the above embodiment, the connecting section 321 can be connected to the insulating film 33.

[0061] In one implementation, please refer to Figure 4 In the width direction Y of the battery pack, the size of the insulating film 33 is smaller than that of the cold plate 31, and the size of the partition 32 is smaller than that of the insulating film 33. Specifically, the length of the insulating film 33 can be greater than the length of the partition 32, so as to ensure that the partition 32 and the cold plate 31 are electrically isolated and a short circuit does not occur; secondly, the length of the partition 32 can be adapted to the length of the glue groove 21, so as to avoid the two ends of the partition 32 protruding from the glue groove 21 and causing the adhesive to overflow.

[0062] In one implementation, please refer to Figure 5 , the cold plate 31 and the partition 32 are an integrated structure. Specifically, the cold plate 31 and the partition 32 can also be an integrated 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 a flat plate. In a specific embodiment, the partition 32 can be a long strip structure protruding from the cold plate 31, and can be a pointed top shape; the purpose of setting the partition 32 is to extend into the glue groove 21 to achieve complete isolation.

[0063] By setting the cold plate 31 and the partition 32 as an integrated structure, the modification of the cross beam 20 can be reduced, and the battery pack 100 can be modified by using the existing cross beam 20 and the structure of the glue groove 21, which can reduce the manufacturing cost of the battery pack 100.

[0064] Optionally, when the cold plate 31 and the partition plate 32 are an integrated structure, an insulating layer may be provided on the surface of the partition plate 32 to prevent electrical leakage.

[0065] In one embodiment, the height of the partition 32 protruding from the connecting surface 311 is 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 in order to ensure the convenience of installing the partition 32 and manufacturing the partition 32, the height of the partition 32 will be greater than the depth of the glue groove in the prior art, and the depth of the glue groove 21 provided by the utility model is adapted to the partition 32, that is, the depth of the glue groove 21 provided by the utility model is not less than the depth of the glue groove in the prior art. It should be explained that the length of the partition 32 is the length of the beam 20.

[0066] In one embodiment, the partition 32 may extend in a straight line in the width direction Y of the battery pack 100 (eg Figure 4or the partition 32 may be bent and extended in the width direction Y of the battery pack 100 (not shown in the figure). The effect of the bending and extension is that the contact area between the partition 32 and the adhesive can be increased, thereby enhancing the connection strength between the adhesive and the partition 32 when curing, thereby further improving the sealing performance.

[0067] In one implementation, please refer to Figure 3 A protrusion 213 is provided on the inner wall surface of the glue-spraying groove 21 . The protrusion 213 extends toward the direction close to the partition 32 , and there is a spacing distance between the protrusion 213 and the partition 32 .

[0068] Specifically, the inner wall surface of the glue groove 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 the side wall is opposite to the surface of the partition 32. The side wall of the glue groove 21 has a protruding protrusion 213, and the protrusion 213 extends toward the direction close to the partition 32.

[0069] Protrusions 213 are provided on the inner wall surface of the gluing groove 21. On the one hand, the complexity of the interior of the gluing groove 21 can be increased, thereby improving the adhesion of the adhesive to the inner wall of the gluing groove 21; on the other hand, the diffusion difficulty of the electrolyte in the battery cell can be increased.

[0070] In one implementation, please refer to Figure 3 and Figure 6 The glue groove 21 includes a first wall 211 and a second wall 212 opposite to each other, and the protrusion 213 includes a first protrusion 213A and a second protrusion 213B. The first protrusion 213A is arranged on the first wall 211, and the second protrusion 213B is arranged on the second wall 212, and there is a gap between the first protrusion 213A and the second protrusion 213B.

[0071] Specifically, the side wall of the glue groove 21 includes a first wall surface 211 and a second wall surface 212 that are opposite to each other in the width direction of the groove body, and the protrusion 213 includes a first protrusion 213A and a second protrusion 213B. The first protrusion 213A protrudes on the first wall surface 211 toward the direction close to the second wall surface 212, and the second protrusion 213B protrudes on 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.

[0072] It can be understood that the first protrusion 213A and the second protrusion 213B can increase the complexity of the interior of the glue groove 21. On the one hand, they can improve the adhesion of the adhesive to the inner wall of the glue groove 21, and on the other hand, they can also increase the difficulty of diffusion of the battery cell electrolyte.

[0073] In one implementation, please refer to Figure 3 and Figure 6 , the protrusion 213 is spaced apart from the partition 32. Specifically, the first protrusion 213A and the second protrusion 213B are both spaced apart from the partition 32, so that the adhesive can flow.

[0074] In one implementation, please refer to Figure 3 and Figure 6 The top of the partition 32 is spaced from the bottom wall of the glue groove 21 so that the spaces on both sides of the two large faces of the partition 32 facing each other are connected, so as to facilitate the glue pouring on one large face of the partition 32.

[0075] In one implementation, please refer to Figure 3 and Figure 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 pallet 10 . The connecting pipe 23 is connected to the connecting surface 311 . The crossbeam body 22 is inserted into the connecting pipe 23 .

[0076] Specifically, the cross beam 20 is assembled from two parts, namely, a cross beam body 22 and a connecting pipe 23. The cross beam body 22 is connected to the bottom plate of the tray 10. A slot 231 is also formed on the side of the connecting pipe 23 facing away from the cold plate 31, and the cross beam body 22 is inserted into the slot 231, so that the cross beam body 22 is connected to the connecting pipe 23.

[0077] Optionally, the connecting pipe 23 is provided with the glue groove 21 and the slot 231 in the above embodiment, wherein the glue groove 21 and the slot 231 are respectively provided on two different surfaces of the connecting pipe 23. Both the glue groove 21 and the slot 231 can be used for pouring adhesive, the adhesive in the glue groove 21 is used for connecting the cold plate 31, and the adhesive in the slot 231 is used for connecting the crossbeam body 22.

[0078] Optionally, the side surfaces of the cross beam body 22 and the connecting pipe 23 are also connected by bolts.

[0079] By configuring the crossbeam 20 to consist of a separate crossbeam body 22 and a connecting tube 23, on the one hand, it is convenient to produce and integrate battery pack parts separately, and the separate welding of the crossbeam body 22 and the tray can reduce the difficulty of welding; on the other hand, the connecting tube 23 can be designed separately for arranging other electrical connection devices in the connecting tube 23.

[0080] In one implementation, please refer to Figure 3, the height of the connecting pipe 23 is greater than the height of the beam body 22. It can be understood that the combination of the connecting pipe 23 and the beam body 22 provided by the utility model is to insert the beam body 22 into the slot 231 opened by the connecting pipe 23, and the connecting pipe 23 should be as close to the bottom plate of the tray 10 as possible. In this way, on the one hand, the space of the receiving cavity is increased, and on the other hand, the strength of the overall structure of the beam 20 is ensured to avoid the beam body 22 not being fully inserted into the slot 231, so as to ensure the protection of the beam body 22 by the connecting pipe 23.

[0081] In one implementation, please refer to Figure 3 and Figure 6 The connecting tube 23 also has a plurality of cavities 232, wherein the plurality of cavities 232 are sequentially arranged along the thickness direction of the battery pack 100. The cavities 232 are inside the connecting tube 23 and extend along the length direction of the connecting tube 23, and the cavities 232 are used to install the long aluminum bar 40.

[0082] In one implementation, please refer to Figure 7 In the thickness direction of the beam, the beam 20 includes a first section 214A and a second section 214B that are relatively spaced apart, and a third section 215A and a fourth section 215B that are relatively spaced apart; along the height direction of the beam 20, the first section 214A and the third section 215A are connected in sequence, and the second section 214B and the fourth section 215B are connected in sequence, and the first section 214A and the second section 214B are located at an end of the beam away from the bottom plate of the pallet 10; the third section 215A includes a first wall surface 211, and the fourth section 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 section 214A and the second section 214B is the shallow groove 233, and the gap between the third section 215A and the fourth section 215B is the cavity 232, and the first protrusion 213A and the second protrusion 213B are relatively arranged in the thickness direction of the beam 20.

[0083] Specifically, the glue groove 21 is composed of at least one cavity 232 , and a shallow groove 233 is formed on a side of the connecting pipe 23 facing the connecting surface 311 , and the sheet metal between the shallow groove 233 and the cavity 232 is opened to form the glue groove 21 .

[0084] Therefore, it can be understood that, based on the above embodiment, the first protrusion 213A and the second protrusion 213B are the sheet metal that originally encloses the cavity 232, and by opening the opening in the sheet metal, the remaining sheet metal forms the first protrusion 213A and the second protrusion 213B, and the glue groove 21 is obtained. Under the obstruction of the first protrusion 213A and the second protrusion 213B, the adhesive in the cavity 232 is not easy to flow out from the shallow groove 233.

[0085] In one embodiment, the spacing distance D1 between the first segment 214A and the second segment 214B is greater than the spacing distance D2 between the third segment and the fourth segment.

[0086] Specifically, in the thickness direction of the connecting tube 23 (i.e., the length direction X of the battery pack), the spacing distance D1 between the first section 214A and the second section 214B is the diameter of the shallow groove 233 mentioned above, and the spacing distance D2 between the third section and the fourth section is the diameter of the cavity 232 mentioned above. The advantage of this arrangement is that the adhesive is poured in from the shallow groove 233, so the larger the diameter of the shallow groove 233 (the spacing distance D1 between the first section 214A and the second section 214B), the easier it is to pour the adhesive. In addition, under the obstruction of the first protrusion 213A and the second protrusion 213B, the adhesive in the cavity 232 is not easy to flow out of the shallow groove 233.

[0087] In one implementation, please refer to Figure 6 The first protrusion 213A and the second protrusion 213B have chamfers on one side facing the connection surface (eg Figure 6 The purpose of setting the chamfer is, on the one hand, to make it easier for the adhesive to flow from the shallow groove 233 into the cavity 232, and the chamfer forms a drainage structure; on the other hand, the adhesive in the cavity 232 is not easy to flow out of the shallow groove 233, because the other side of the first protrusion 213A and the second protrusion 213B does not have a chamfer that can drain; on the other hand, the chamfer can also achieve installation guidance, which is convenient for the installation of the battery pack.

[0088] In one implementation, please refer to Figure 8 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 up and down, the upper connecting section 23A is connected to the cold plate assembly 30, and the lower connecting section 23B is connected to the beam body 22; and the length of the upper connecting section 23A (in the width direction Y of the battery pack 100) is smaller than the length of the lower connecting section 23B.

[0089] Optionally, the upper connecting section 23A and the lower connecting section 23B are an integrated structure. The upper connecting section 23A is provided with the above-mentioned shallow groove 233 and at least one cavity 232, and the lower connecting section 23B is provided with the above-mentioned slot 231 and at least one cavity 232. The opening formed in the upper connecting section 23A is at the first protrusion 213A and the second protrusion 213B, and the opening is such that a cavity 232 and the shallow groove 233 are connected to form a glue groove. Optionally, the shape and volume of the cavity in the upper connecting section 23A are not completely the same as the shape and volume of the cavity in the lower connecting section 23B.

[0090] By providing the connecting tube 23 with 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 in the installation of parts in the battery pack.

[0091] In one embodiment, the utility model provides an electric device, which includes an electric device and the battery pack 100 in the above embodiment, and the electric device is electrically connected to the battery pack 100. In a specific embodiment, the electric device can be a vehicle or an energy storage cabinet.

[0092] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0093] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A cold plate assembly for a battery pack, the battery pack comprising a crossbeam and a tray, characterized in that: The crossbeam is placed in the tray to separate the receiving cavity, and a glue groove extending along the length direction of the crossbeam is provided on the crossbeam. The cold plate assembly includes: a cold plate including a connection surface facing the crossbeam; A partition is connected to the connecting surface, the partition is used to extend into the glue groove, and the partition is suitable for extending along the length direction of the beam.

2. The cold plate assembly according to claim 1, characterized in that The partition includes a connecting section and a supporting section connected at an angle, the connecting section is connected to the connecting surface, and the supporting section is used to extend into the gluing groove.

3. The cold plate assembly according to claim 1, characterized in that The cold plate assembly further includes an insulating film, the insulating film is connected to the connecting surface, and the partition is connected to the insulating film.

4. The cold plate assembly according to claim 1, characterized in that The cold plate and the partition plate are an integrated structure.

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

6. A battery pack support structure, characterized in that: The battery pack support structure includes a crossbeam and a cold plate assembly as described in any one of claims 1-5, the crossbeam is provided with a glue groove on one side facing the connection surface, the glue groove is used to fill with adhesive, and the partition extends into the glue groove and is connected with the adhesive.

7. The battery pack support structure according to claim 6, characterized in that: The battery pack support structure also includes a tray, which encloses a receiving cavity. The crossbeam connects the bottom plate of the tray and separates the receiving cavity into a first receiving cavity and a second receiving cavity.

8. The battery pack support structure according to claim 7, characterized in that: The crossbeam comprises a crossbeam body and a connecting pipe, wherein the crossbeam body is connected to the bottom plate of the pallet, the connecting pipe is connected to the connecting surface, and the crossbeam body is inserted into the connecting pipe.

9. The battery pack support structure according to claim 6, characterized in that: The inner wall surface of the glue-spraying groove is provided with a protrusion, the protrusion extends in a direction close to the partition, and there is a spacing distance between the protrusion and the partition.

10. The battery pack support structure according to claim 9, characterized in that: The glue groove includes a first wall surface and a second wall surface opposite to each other, and the protrusion includes a first protrusion and a second protrusion. The first protrusion is arranged on the first wall surface, and the second protrusion is arranged on the second wall surface. There is a gap between the first protrusion and the second protrusion.

11. The battery pack support structure according to claim 10, characterized in that: In the thickness direction of the crossbeam, the crossbeam includes a first section and a second section that are relatively spaced apart, and a third section and a fourth section that are relatively spaced apart; in the height direction of the crossbeam, the first section and the third section are sequentially connected, and the second section and the fourth section are sequentially connected, and the first section and the second section are located at an end of the crossbeam away from the bottom plate of the pallet; The glue groove includes a shallow groove and a cavity, the gap between the first section and the second section is the shallow groove, the gap between the third section and the fourth section is the cavity, and the first protrusion and the second protrusion are arranged opposite to each other in the thickness direction of the beam.

12. The battery pack support structure according to claim 11, characterized in that: A spacing distance D1 between the first segment and the second segment is greater than a spacing distance D2 between the third segment and the fourth segment.

13. The battery pack support structure according to claim 10, characterized in that: The first protrusion and the second protrusion have chamfers on a surface facing the connecting surface.

14. The battery pack support structure according to claim 6, characterized in that: The bottom wall of the glue-spraying groove is spaced apart from the partition.

15. A battery pack, characterized in that: It comprises a battery cell and a battery pack support structure as claimed in any one of claims 6 to 14, wherein the battery cell is accommodated in the battery pack support structure.

16. An electrical equipment, characterized in that: It comprises an electrical appliance and a battery pack as claimed in claim 15, wherein the battery pack supplies power to the electrical appliance.

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