Liquid cooling plate and battery pack

Abstract

A liquid cooling plate and a battery pack. The liquid cooling plate comprises a liquid cooling plate body. The liquid cooling plate body is provided with a plurality of cooling flow channels and a plurality of exhaust through holes. The plurality of exhaust through holes form an exhaust through hole array. The exhaust through hole array comprises exhaust through hole rows distributed at intervals in a first direction and exhaust through hole columns distributed at intervals in a second direction. The plurality of cooling flow channels are arranged at intervals in the first direction. The plurality of cooling flow channels each comprise a first flow channel section, a second flow channel section, and an adapter section. The plurality of second flow channel sections are respectively arranged between adjacent exhaust through holes among the plurality of exhaust through holes of the exhaust through hole rows. The plurality of first flow channel sections are respectively arranged between adjacent exhaust through holes among the plurality of exhaust through holes of the exhaust through hole columns. The first flow channel section and the second flow channel section of the same cooling flow channel among the plurality of cooling flow channels are alternately arranged and spaced apart in the second direction, and the first flow channel section and the second flow channel section of the same cooling flow channel are connected by means of the adapter section of the same cooling flow channel.

Description

Liquid cooling plate and battery pack

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202422419947.8, filed on September 30, 2024, and entitled "A liquid cooling plate and battery pack", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a liquid cooling plate and battery pack. BACKGROUND

[0004] The battery pack used in new energy vehicles usually includes a plurality of battery monomers (battery cells), and an explosion-proof valve is arranged on each battery monomer. When the battery monomer is in thermal runaway, the explosion-proof valve will burst open, and the spewing material (the internal temperature of the battery cell in thermal runaway can reach more than 200 degrees Celsius, so the spewing material can include high-temperature gas, molten material, etc.) will spew out. If the spewing material is allowed to flow among other battery monomers, its high-temperature and high-pressure characteristics will affect the stability of other battery monomers, and even cause safety problems such as thermal spread. In the prior art, an exhaust passage is designed in the battery pack to solve this problem. The exhaust passage is separated from the area where the battery monomers are located by a separation component. By arranging, for example, an exhaust through hole on the separation component, the spewing material can pass through the separation component into the exhaust passage when the explosion-proof valve of the battery monomer bursts open, and the spewing material can be dispersed through the exhaust passage, thereby solving the problem of the negative impact of high-temperature and high-pressure spewing material on other battery monomers. In order to further reduce the temperature of the spewing material when the battery monomer is in thermal runaway, some existing battery packs directly use a liquid cooling plate as a separation component of the exhaust passage. The exhaust through hole is arranged on the liquid cooling plate, and the explosion-proof valve of the battery monomer corresponds to the central axis of the battery monomer and the exhaust through hole. The cooling flow channel on the liquid cooling plate needs to be staggered with the exhaust through hole, that is, the cooling flow channel can only pass from the edge of the exhaust through hole, so that the cooling of the liquid cooling plate can only be at the edge position of the battery monomer, and the cooling effect is not good.

[0005] Therefore, there is an urgent need for a liquid cooling plate and battery pack to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a liquid cooling plate and battery pack to improve the cooling effect of the liquid cooling plate on the battery pack.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0008] A liquid cooling plate, comprising a liquid cooling plate body, a plurality of cooling flow channels and a plurality of exhaust through holes are arranged on the liquid cooling plate body, the plurality of cooling flow channels and the plurality of exhaust through holes are arranged at intervals, and the liquid cooling plate has intersecting first and second directions.

[0009] The plurality of exhaust holes pass through the liquid cooling plate body in the thickness direction of the liquid cooling plate body, and form an exhaust hole array including exhaust hole rows spaced along the first direction and exhaust hole columns spaced along the second direction;

[0010] The plurality of cooling flow channels are arranged in the liquid cooling plate body, and are spaced along the first direction;

[0011] The plurality of cooling flow channels each include a plurality of first flow channel segments, a plurality of second flow channel segments, and a plurality of adapter segments, the plurality of second flow channel segments are respectively arranged between adjacent exhaust holes in the exhaust hole rows, the plurality of first flow channel segments are respectively arranged between adjacent exhaust holes in the exhaust hole columns and extend towards the second direction, the first flow channel segment and the second flow channel segment of the same cooling flow channel are alternately and spaced arranged along the second direction, and the first flow channel segment and the second flow channel segment of the same cooling flow channel are connected by the adapter segment of the same cooling flow channel.

[0012] As an improvement of the above technical solution, each of the plurality of adapter segments extends along a circular arc line on the plane of the liquid cooling plate body.

[0013] As an improvement of the above technical solution, the flow channel cross-sectional area of each of the plurality of second flow channel segments is greater than the flow channel cross-sectional area of each of the plurality of first flow channel segments.

[0014] As an improvement of the above technical solution, from one end of one of the plurality of adapter segments connected to one of the plurality of first flow channel segments to the other end of the one of the plurality of adapter segments connected to one of the plurality of second flow channel segments, the flow channel cross-sectional area of the one of the plurality of adapter segments gradually increases.

[0015] As an improvement of the above technical solution, the liquid cooling plate body is provided with a total liquid inlet and a total liquid outlet, and the plurality of cooling flow channels are in communication with the total liquid inlet and the total liquid outlet;

[0016] The liquid cooling plate body has a first end and a second end oppositely arranged along the second direction, the first end of the liquid cooling plate body is provided with a first adapter flow channel group, and the second end is provided with a second adapter flow channel group, one end of each of the plurality of cooling flow channels is in communication with the first adapter flow channel group, and the other end is in communication with the second adapter flow channel group;

[0017] The total liquid inlet is in communication with the first adapter flow channel group, and the total liquid outlet is in communication with the first adapter flow channel group or the second adapter flow channel group.

[0018] As an improvement of the above technical solution, the total liquid outlet and the total liquid inlet are in communication with the first adapter flow channel group, the liquid cooling plate further comprises an inlet and outlet buckle plate, an inlet joint and an outlet joint, the inlet and outlet buckle plate is buckled on the liquid cooling plate body and forms an inlet cavity and an outlet cavity between the liquid cooling plate body, the total liquid inlet is located in the inlet cavity, the total liquid outlet is located in the outlet cavity, the inlet joint is connected to the inlet and outlet buckle plate and in communication with the inlet cavity, and the outlet joint is connected to the inlet and outlet buckle plate and in communication with the outlet cavity.

[0019] As an improvement of the above technical solution, the liquid cooling plate body has a third end along the first direction, and two of the plurality of cooling flow channels closest to the third end in the first direction have a shared first flow channel section.

[0020] A battery pack comprising the liquid cooling plate of any one of the above, further comprising:

[0021] A box body comprising a cover plate, a bottom plate and a side beam, the cover plate, the bottom plate and the side beam are surrounded to form a containing cavity, and the liquid cooling plate is arranged in the containing cavity;

[0022] A battery pack arranged in the containing cavity, the battery pack is composed of a plurality of battery monomers arranged in an array, the battery monomer has a shell, the shell has a first surface, the first surface faces the liquid cooling plate body, and the first surface is provided with a first explosion-proof valve, and the orthographic projection of the first explosion-proof valve on the liquid cooling plate body is located in the corresponding exhaust hole.

[0023] As an improvement of the above technical solution, the liquid cooling plate divides the containing cavity into a first containing cavity and a second containing cavity;

[0024] The first containing cavity is used for containing the battery pack;

[0025] The first explosion-proof valve is configured to respond to the battery monomer and to open to allow the discharge from the inside of the battery monomer to pass through; the second containing cavity is used for collecting the discharge, and the discharge enters the second containing cavity through the exhaust hole;

[0026] The battery pack further comprises:

[0027] A support plate;

[0028] The liquid cooling plate body and the bottom plate constitute at least part of the wall surface of the second containing cavity, the support plate is clamped between the bottom plate and the liquid cooling plate body, the support plate protrudes in the direction close to the liquid cooling plate body and is provided with a plurality of abutting portions spaced apart along the first direction, and the plurality of abutting portions abut the liquid cooling plate body.

[0029] As an improvement of the above technical solution, the abutting portion is at least partially sandwiched between adjacent cooling flow channels of the plurality of cooling flow channels.

[0030] As an improvement of the above technical solution, the plurality of abutting portions are staggered with the plurality of exhaust through holes, and each of the plurality of abutting portions is at least partially sandwiched between two second flow channel segments adjacent in the first direction among the plurality of second flow channel segments.

[0031] As an improvement of the above technical solution, the two second flow channel segments on the same side are respectively connected with two of the plurality of switching segments.

[0032] Each of the plurality of abutting portions is also partially sandwiched between adjacent switching segments of the plurality of switching segments.

[0033] As an improvement of the above technical solution, the support plate further comprises a plurality of support portions, each of the plurality of support portions is arranged between adjacent abutting portions of the plurality of abutting portions and abuts against the bottom plate, and a gap exists between each of the plurality of support portions and the liquid cooling plate body.

[0034] As an improvement of the above technical solution, the support plate extends in the first direction, and a plurality of support plates are arranged in the second direction.

[0035] Compared with the prior art, the present application has the following advantages:

[0036] When the liquid cooling plate is installed in a battery pack, each exhaust through hole corresponds to a battery monomer, and the spewing material of the battery monomer in thermal runaway is discharged through the corresponding exhaust through hole. The length direction of the battery monomer is parallel to the second direction. The first flow channel segment extending in the second direction is arranged between any two adjacent exhaust through holes in the exhaust through hole column, and the second flow channel segment is arranged between any two adjacent exhaust through holes in the exhaust through hole row. The switching segment connects the second flow channel segment and the first flow channel segment. The first flow channel segment and the second flow channel segment of the same cooling flow channel are alternately and spaced arranged in the second direction, so that each battery monomer corresponding to each exhaust through hole is at least cooled by one first flow channel segment, one second flow channel segment and one switching segment. Most of the battery monomers can be cooled by two adjacent first flow channel segments, one second flow channel segment and two adjacent switching segments, so that the liquid cooling plate can have a better cooling effect on each battery monomer in the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0037] FIG. 1 is a structural schematic view of a liquid cooling plate according to an embodiment of the present application;

[0038] FIG. 2 is a schematic view of part of the structure of the liquid cooling plate according to an embodiment of the present application;

[0039] Fig. 3 is a structure diagram of an inlet and outlet liquid buckle plate of a liquid cooling plate according to an embodiment of the present application;

[0040] Fig. 4 is a structure diagram of another part of the liquid cooling plate according to an embodiment of the present application;

[0041] Fig. 5 is a structure diagram of another part of the liquid cooling plate according to an embodiment of the present application;

[0042] Fig. 6 is an enlarged view of A in Fig. 5;

[0043] Fig. 7 is a structure diagram of a battery pack according to an embodiment of the present application;

[0044] Fig. 8 is an exploded view of the battery pack according to an embodiment of the present application;

[0045] Fig. 9 is a structure diagram of a battery group of the battery pack according to an embodiment of the present application;

[0046] Fig. 10 is a structure diagram of a battery cell of the battery group of the battery pack according to an embodiment of the present application;

[0047] Fig. 11 is a structure diagram of a part of the battery pack according to an embodiment of the present application;

[0048] Fig. 12 is a structure diagram of a support plate of the battery pack according to an embodiment of the present application;

[0049] Fig. 13 is a structure diagram of another part of the battery pack according to an embodiment of the present application;

[0050] Fig. 14 is an enlarged view of B in Fig. 13;

[0051] Fig. 15 is a structure diagram of a spacer group of the battery pack according to an embodiment of the present application;

[0052] Fig. 16 is a sectional view of still another part of the battery pack according to an embodiment of the present application;

[0053] Fig. 17 is an enlarged view of C in Fig. 16.

[0054] In the figure: e, liquid cooling plate; 1, liquid cooling plate body; 11, cooling flow channel; 111, first flow channel section; 112, second flow channel section; 113, adapter section; 12, exhaust hole; f, exhaust hole array; g, exhaust hole row; h, exhaust hole column; i, first rectangular area; j, second rectangular area; 13, total liquid inlet; 14, total liquid outlet; 15, first adapter flow channel group; 16, second adapter flow channel group; 17, first end; 18, second end; 19, third end; 2, liquid inlet and outlet buckle plate; 3, liquid inlet connector; 4, liquid outlet connector; 5, liquid inlet cavity; 6, liquid outlet cavity; k, battery pack; 10, box body; 101, cover plate; 102, bottom plate; 103, edge beam; 1031, first communication hole; 1032, second explosion-proof valve; 1033, exhaust space; 1034, protective cover body; 1035, outer wall; 20, battery pack; 201, battery monomer; 2011, shell; 20111, first surface; 20112, first explosion-proof valve; 30, support plate; 301, abutment portion; 302, support portion; 40, heat-conducting sealing layer; 401, spacer group; 4011, spacer; 40111, weak area; 402, adhesive layer; 50, CCS assembly; h, containing cavity; 100, second containing cavity; 200, first containing cavity; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0055] The specific embodiments of the present application will be further described in the following detailed description with reference to the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0056] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0058] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

[0059] As shown in FIGS. 1-6, the present embodiment provides a liquid cooling plate e, comprising a liquid cooling plate body 1, a plurality of cooling flow channels 11 and a plurality of exhaust through holes 12 are arranged on the liquid cooling plate body 1, the plurality of cooling flow channels 11 and the plurality of exhaust through holes 12 are arranged at intervals, the liquid cooling plate e has intersecting first direction X and second direction Y. The plurality of exhaust through holes 12 penetrate the liquid cooling plate body 1 in the thickness direction of the liquid cooling plate body 1, wherein the thickness direction of the liquid cooling plate body 1 is perpendicular to the first direction X and the second direction Y, and the plurality of exhaust through holes 12 form an exhaust through hole array f, the exhaust through hole array f includes exhaust through hole rows g distributed at intervals along the first direction X, and exhaust through hole columns h distributed at intervals along the second direction Y. The plurality of cooling flow channels 11 are arranged in the liquid cooling plate body 1, and the plurality of cooling flow channels 11 are arranged at intervals along the first direction X. Wherein, the plurality of cooling flow channels 11 each include a plurality of first flow channel segments 111, a plurality of second flow channel segments 112, and a plurality of switching segments 113, the plurality of second flow channel segments 112 are respectively arranged between adjacent exhaust through holes 12 in the plurality of exhaust through holes 12 in the exhaust through hole row g; the plurality of first flow channel segments 111 are respectively arranged between adjacent exhaust through holes 12 in the plurality of exhaust through holes 12 in the exhaust through hole column h and extend towards the second direction Y; the first flow channel segment 111 and the second flow channel segment 112 of the same cooling flow channel 11 in the plurality of cooling flow channels 11 are arranged alternately and at intervals along the second direction Y, and the first flow channel segment 111 and the second flow channel segment 112 of the same cooling flow channel 11 are connected through the switching segment 113 of the same cooling flow channel 11.

[0060] The liquid cooling plate e provided by the embodiment is installed in the battery pack k, each exhaust hole corresponds to one battery monomer 201, and the eruption of the battery monomer 201 in thermal runaway is discharged through the corresponding exhaust hole 12. The length direction of the battery monomer 201 is parallel to the second direction Y. The first flow channel section 111 extending along the second direction Y is arranged between any two adjacent exhaust holes 12 in the exhaust hole column h, and the second flow channel section 112 is arranged between any two adjacent exhaust holes 12 in the exhaust hole row g. The first flow channel section 111 and the second flow channel section 112 of the same cooling flow channel 11 are alternately and spacedly arranged along the second direction Y, so that each battery monomer 201 corresponding to each exhaust hole 12 is cooled by at least one first flow channel section 111, one second flow channel section 112 and one adapter section 113. Most of the battery monomers 201 can be cooled by two adjacent first flow channel sections 111, one second flow channel section 112 and two adjacent adapter sections 113, so that the liquid cooling plate e has a better cooling effect on each battery monomer 201 in the battery pack 20.

[0061] Specifically, the second flow channel section 112 is located between any two adjacent exhaust holes 12 in the exhaust hole row g, specifically, the width of the exhaust hole 12 along the first direction X is taken as the side line, the corresponding connecting line of the end points of the two side lines of the two adjacent exhaust holes 12 in the same exhaust hole row g forms a first rectangular area i, and the second flow channel section 112 is located in the first rectangular area i. Similarly, the first flow channel section 111 is arranged between any two adjacent exhaust holes 12 in the exhaust hole column h, specifically, the width of the exhaust hole 12 along the second direction Y is taken as the side line, the corresponding connecting line of the end points of the two side lines of the two adjacent exhaust holes 12 in the same exhaust hole column h forms a second rectangular area j, and the first flow channel section 111 is located in the second rectangular area j.

[0062] Optionally, the adapter section 113 and the first flow channel section 111 are connected by a circular arc; and / or the adapter section 113 and the second flow channel section 112 are connected by a circular arc. That is, on the plane of the liquid cooling plate body 1, the plurality of adapter sections 113 extend along the circular arc line. The circular arc connection is conducive to reducing the flow resistance, so that the adapter section 113 and the first flow channel section 111 and the adapter section 113 and the second flow channel section 112 can be partially connected by a circular arc or completely connected by a circular arc to reduce the flow resistance of the cooling flow channel 11. Preferably, as shown in FIG. 5, the adapter section 113 and the first flow channel section 111 and the adapter section 113 and the second flow channel section 112 are connected by a circular arc, so that the adapter section 113 and the first flow channel section 111 and the adapter section 113 and the second flow channel section 112 have relatively low flow resistance.

[0063] Optionally, as shown in FIG. 5, the flow passage sectional area of each of the plurality of second flow passage segments 112 is greater than the flow passage sectional area of each of the plurality of first flow passage segments 111. Since the first flow passage segment 111 is arranged between two adjacent exhaust holes 12 in the exhaust hole row h, in order to ensure the exhaust effect of the exhaust hole 12, the exhaust hole 12 needs to maintain a relatively large size, resulting in a small space between the two adjacent exhaust holes 12 in the exhaust hole row h. Limited by the space between the two adjacent exhaust holes 12, the flow passage sectional area of the first flow passage segment 111 is relatively small, and the arrangement of the second flow passage segment 112 is less restricted than the first flow passage segment 111. Therefore, the flow passage sectional area of the second flow passage segment 112 can be appropriately increased, so that the flow passage sectional area of the second flow passage segment 112 is greater than the flow passage sectional area of the first flow passage segment 111, which is beneficial to reduce the overall flow resistance of the cooling flow passage 11.

[0064] Further, as shown in FIG. 5, the flow passage sectional area of the plurality of adapter segments 113 gradually increases from one end connected to one of the plurality of first flow passage segments 111 to the other end connected to one of the plurality of second flow passage segments 112. The gradually changing flow passage sectional area of the adapter segment 113 is beneficial to further reduce the flow resistance of the cooling liquid flowing from the first flow passage segment 111 to the second flow passage segment 112 and the flow resistance of the cooling liquid flowing from the second flow passage segment 112 to the first flow passage segment 111.

[0065] In this embodiment, the gradually changing flow passage sectional area of the adapter segment 113 means that the flow passage sectional area always increases or decreases along a certain linear proportion.

[0066] Optionally, as shown in FIG. 4, the liquid cooling plate body 1 is provided with a total liquid inlet 13 and a total liquid outlet 14, each cooling flow passage 11 can communicate with the total liquid inlet 13 and the total liquid outlet 14, and the cooling liquid enters the cooling flow passage 11 through the total liquid inlet 13 and flows out through the total liquid outlet 14.

[0067] Further, as shown in FIG. 4 and FIG. 5, the liquid cooling plate body 1 has a first end 17 and a second end 18 oppositely arranged along the second direction Y, the first end 17 of the liquid cooling plate body 1 is provided with a first adapter flow channel group 15, the second end 18 is provided with a second adapter flow channel group 16, each cooling flow channel 11 is in communication with the first adapter flow channel group 15 at one end and in communication with the second adapter flow channel group 16 at the other end, and each cooling flow channel 11 is in communication with each other to form a whole through cooperation of the first adapter flow channel group 15 and the second adapter flow channel group 16. The total inlet 13 is in communication with the first adapter flow channel group 15, and the total outlet 14 is in communication with the first adapter flow channel group 15 or the second adapter flow channel group 16. For each cooling flow channel 11 in communication with each other to form a whole, the total inlet 13 and the total outlet 14 can be arranged at the same end of the liquid cooling plate body 1, that is, in communication with the first adapter flow channel group 15, or can be arranged at two ends of the liquid cooling plate body 1, that is, the total inlet 13 is in communication with the first adapter flow channel group 15, and the total outlet 14 is in communication with the second adapter flow channel group 16.

[0068] Further, as shown in FIG. 4, the total outlet 14 and the total inlet 13 are both in communication with the first adapter flow channel group 15, and the liquid cooling plate e further comprises an inlet and outlet buckling plate 2, an inlet joint 3 and an outlet joint 4. The inlet and outlet buckling plate 2 is buckled on the liquid cooling plate body 1 and forms an inlet cavity 5 and an outlet cavity 6 between the liquid cooling plate body 1, the total inlet 13 is located in the inlet cavity 5, the total outlet 14 is located in the outlet cavity 6, the inlet joint 3 is connected to the inlet and outlet buckling plate 2 and in communication with the inlet cavity 5, and the outlet joint 4 is connected to the inlet and outlet buckling plate 2 and in communication with the outlet cavity 6. In order to reduce the overall thickness of the battery pack k, the liquid cooling plate body 1 is usually thin, and it is difficult to directly connect the inlet joint 3 and the outlet joint 4 to the liquid cooling plate body 1, so the inlet and outlet buckling plate 2 is needed to connect the inlet joint 3 and the outlet joint 4 to the liquid cooling plate body 1, and the total outlet 14 and the total inlet 13 are arranged at the same end of the liquid cooling plate body 1, so that only one inlet and outlet buckling plate 2 is needed to meet the connection needs of the inlet joint 3 and the outlet joint 4. In this embodiment, two total inlets 13 and one total outlet 14 are arranged on the liquid cooling plate body 1, and the two total inlets 13 are both in communication with the inlet cavity 5.

[0069] Optionally, as shown in FIG. 5, the liquid cooling plate body 1 has a third end 19 along the first direction X, and two cooling flow channels 11 closest to the third end 19 along the first direction X have a shared first flow channel section 111. Since in this embodiment, one first flow channel section 111 is arranged between every two adjacent exhaust through holes 12 along the first direction X, that is to say, the number of first flow channel sections 111 corresponding to each exhaust through hole column h is one less than the number of exhaust through holes 12 in the exhaust through hole column h, and in this embodiment, one second flow channel section 112 is arranged between every two adjacent exhaust through holes 12 along the second direction Y, that is to say, the total number of first flow channel sections 111 between each exhaust through hole 12 of each exhaust through hole column h is one less than the total number of second flow channel sections 112 on one side of the exhaust through hole column h along the first direction X, therefore in this embodiment, the two cooling flow channels 11 closest to the third end 19 along the first direction X have a shared first flow channel section 111, ensuring that each second flow channel section 112 can be connected to the first flow channel section 111.

[0070] As shown in FIGS. 7-17, the present embodiment further provides a battery pack k, which comprises the above-mentioned liquid cooling plate e, and further comprises a box 10 and a battery pack 20. The box 10 comprises a cover plate 101, a bottom plate 102 and a side beam 103, which surround to form a containing cavity h, and the liquid cooling plate e is arranged in the containing cavity h. The battery pack 20 is arranged in the containing cavity h, and the battery pack 20 is composed of a plurality of battery monomers 201 arranged in an array, and the battery monomer 201 has a shell 2011, and the shell 2011 has a first surface 20111, which faces the liquid cooling plate body 1, and the first surface 20111 is provided with a first explosion-proof valve 20112, and the orthographic projection of the first explosion-proof valve 20112 on the liquid cooling plate body 1 is located in the corresponding exhaust through hole 12.

[0071] Further, the liquid cooling plate e divides the containing cavity h into a first containing cavity 200 and a second containing cavity 100; the first containing cavity 200 is used for containing the battery pack 20; the first explosion-proof valve 20112 is configured to respond to the battery monomer 201 and to blow open for the discharge (i.e., the eruption) inside the battery monomer 201 to pass through; and the second containing cavity 100 is used for collecting the discharge, and the discharge enters the second containing cavity 100 through the exhaust through hole 12.

[0072] Optionally, as shown in FIGS. 8-14, the battery pack k further comprises a support plate 30. The liquid cooling plate body 1 and the bottom plate 102 constitute at least part of the wall of the second containing cavity 100, and the support plate 30 is clamped between the bottom plate 102 and the liquid cooling plate body 1. The support plate 30 protrudes in the direction close to the liquid cooling plate body 1 and is provided with a plurality of abutting portions 301 which are arranged in the first direction X. The plurality of abutting portions 301 abut against the liquid cooling plate body 1 to support the liquid cooling plate body 1, so that the second containing cavity 100 is formed between the liquid cooling plate body 1 and the bottom plate 102. In this embodiment, the abutting portion 301 and the liquid cooling plate body 1 are bonded by structural adhesive, so as to further improve the stability of the support plate 30 supporting the liquid cooling plate body 1.

[0073] Optionally, as shown in FIGS. 13 and 14, the abutting portion 301 is at least partially clamped between adjacent cooling flow channels 11 of the plurality of cooling flow channels 11. Thus, the abutting portion 301 can more stably support the liquid cooling plate body 1.

[0074] Further, as shown in FIGS. 13 and 14, the plurality of abutting portions 301 are arranged in a staggered manner with the plurality of exhaust through holes 12, so as to avoid the abutting portion 301 from blocking the exhaust through hole 12 and affecting the exhaust of the exhaust through hole 12. Each abutting portion 301 is at least partially clamped between two adjacent second flow channel segments 112 in the first direction X. The region between the two adjacent second flow channel segments 112 is not provided with a cooling flow channel 11, and the abutting portion 301 abutting and supporting at this position will not cause the collapse of the cooling flow channel 11. In addition, the two adjacent second flow channel segments 112 are respectively connected with two adjacent adapter segments 113. Each abutting portion 301 is also partially clamped between the two adjacent adapter segments 113. This arrangement can further improve the stability of the abutting portion 301 supporting the liquid cooling plate body 1, and will not block the exhaust through hole 12 or cause the collapse of the cooling flow channel 11. The U-shaped flow channel formed by the second flow channel segment 112 and the two adjacent adapter segments 113 provides a positioning shape for the abutting portion 301. The shape of the abutting portion 301 is also U-shaped and can be embedded between the adjacent flow channels. The two adjacent U-shaped flow channels clamp the abutting portion 301, so that the liquid cooling plate body 1 and the support plate 30 cannot move relative to each other in the first direction X and the second direction Y.

[0075] Optionally, as shown in FIGS. 8-14, the support plate 30 further comprises a plurality of support portions 302, which are arranged between adjacent abutting portions 301 of the plurality of abutting portions 301 and abut against the bottom plate 102. Each support portion 302 has a gap between the liquid cooling plate body 1. This suggestion is used for the ejection of the material, so as to avoid the existence of the support plate 30 from hindering the flow of the ejection material.

[0076] Optionally, as shown in FIG. 11, the support plate 30 extends along the first direction X, and a plurality of support plates 30 are provided, and the plurality of support plates 30 are spaced apart along the second direction Y, and the plurality of spaced-apart support plates 30 can make the liquid cooling plate body 1 more uniform under stress.

[0077] Optionally, as shown in FIGS. 16 and 17, the edge beam 103 is provided with a first communication hole 1031, and the first communication hole 1031 communicates the outside of the box body 10 with the second containing cavity 100, and the first communication hole 1031 is provided with a second explosion-proof valve 1032. When the battery monomer 201 occurs thermal runaway, the first explosion-proof valve 20112 breaks, and the spewing material generated by the battery monomer 201 enters the second containing cavity 100 through the broken first explosion-proof valve 20112 and the corresponding exhaust hole 12, and the pressure in the second containing cavity 100 increases, and when the pressure in the second containing cavity 100 increases to the pressure threshold value at which the second explosion-proof valve 1032 breaks, the second explosion-proof valve 1032 on the edge beam 103 breaks, and the spewing material can be discharged from the battery pack k through the first communication hole 1031. The first communication hole 1031 is arranged on the edge beam 103, which can avoid the spewing material from spewing upward into the cab, thereby improving the safety of the vehicle.

[0078] Further, as shown in FIGS. 16 and 17, the edge beam 103 is further provided with an exhaust space 1033 communicating with the second containing cavity 100, and the first communication hole 1031 communicates with the second containing cavity 100 through the exhaust space 1033. By arranging the exhaust space 1033 to connect the second containing cavity 100 and the first communication hole 1031, the position of the first communication hole 1031 can be selected as needed, without being arranged in the lower region of the liquid cooling plate body 1 as the exhaust space 1033, which is conducive to reducing the overall thickness of the battery pack k. In this embodiment, the first communication hole 1031 is located above the liquid cooling plate body 1, the second containing cavity 100 extends to below the exhaust space 1033, and the bottom of the exhaust space 1033 communicates with the second containing cavity 100.

[0079] Further, the first communication hole 1031 is provided with a plurality of first communication holes 1031, and the plurality of first communication holes 1031 are spaced apart along the extension direction of the edge beam 103, and the second explosion-proof valve 1032 and the exhaust space 1033 are arranged one by one with the first communication hole 1031. The plurality of first communication holes 1031 cooperate with the corresponding plurality of second explosion-proof valves 1032 and the plurality of exhaust spaces 1033, so that when the battery monomer 201 at each position occurs thermal runaway, the spewing material can be discharged in time through the corresponding first communication hole 1031.

[0080] Optionally, as shown in FIG. 7, FIG. 16 and FIG. 17, the edge beam 103 is further provided with a protective cover 1034, which is fixedly arranged on the outer wall 1035 of the edge beam 103 and arranged in one-to-one correspondence with the first communication hole 1031, and the protective cover 1034 covers the corresponding first communication hole 1031 and the second explosion-proof valve 1032.

[0081] Optionally, as shown in FIG. 8 and FIG. 15, the battery pack k provided in the embodiment further comprises a heat-conducting sealing layer 40, which comprises a plurality of spacer groups 401 arranged in one-to-one correspondence with the exhaust hole column h, and the spacer group 401 is arranged on the liquid cooling plate body 1, and the spacer group 401 comprises a plurality of sequentially connected spacers 4011, the spacer 4011 in the spacer group 401 is arranged in one-to-one correspondence with the exhaust hole 12 in the exhaust hole column h, and the spacer 4011 covers the corresponding exhaust hole 12, and the spacer 4011 is provided with a weak area 40111, and the orthographic projection of the weak area 40111 on the liquid cooling plate body 1 is located in the corresponding exhaust hole 12. When the battery monomer 201 is in thermal runaway, the first explosion-proof valve 20112 breaks, and the spewing material breaks the weak area 40111 on the corresponding spacer 4011, and then enters the second containing cavity 100 through the corresponding exhaust hole 12. Due to the blocking effect of other unbroken spacers 4011, the spewing material will not return to the first containing cavity 200 through other exhaust holes 12 after entering the second containing cavity 100, thereby reducing the influence of the spewing material on other normal battery monomers 201. In the embodiment, the spacer 4011 is a mica sheet.

[0082] Further, as shown in FIG. 8, the heat-conducting sealing layer 40 further comprises a glue layer 402, and the region between the liquid cooling plate body 1 and the battery pack 20 where the spacer group 401 is not arranged is provided with the glue layer 402, and the liquid cooling plate body 1 is bonded with the battery pack 20 through the glue layer 402, which plays a certain fixing role on the battery pack 20 while improving the heat-conducting performance between the battery pack 20 and the liquid cooling plate body 1. The glue layer 402 can adopt a heat-conducting structural adhesive or a heat-conducting glue.

[0083] Optionally, as shown in FIG. 8, the battery pack k provided in the embodiment further comprises a CCS (Cells Contact System) assembly 50, which is arranged between the battery pack 20 and the cover plate 101, and is used for series and parallel connection of the battery monomer 201 and acquisition of temperature and pressure signals.

[0084] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, which should be regarded as the protection scope of the present application.

Claims

1. A liquid cooling plate comprising a liquid cooling plate body (1) provided with a plurality of cooling flow channels (11) and a plurality of exhaust vent holes (12), the plurality of cooling flow channels (11) and the plurality of exhaust vent holes (12) being spaced apart, the liquid cooling plate having a first direction (X) and a second direction (Y) intersecting each other; the plurality of exhaust vent holes (12) penetrating through the liquid cooling plate body (1) in a thickness direction of the liquid cooling plate body (1), and the plurality of exhaust vent holes (12) forming an exhaust vent hole array (f) comprising exhaust vent hole rows (g) spaced apart along the first direction (X) and exhaust vent hole columns (h) spaced apart along the second direction (Y); the plurality of cooling flow channels (11) being arranged in the liquid cooling plate body (1), the plurality of cooling flow channels (11) being spaced apart along the first direction (X); wherein each of the plurality of cooling flow channels (11) comprising a plurality of first flow channel segments (111), a plurality of second flow channel segments (112) and a plurality of switching segments (113), the plurality of second flow channel segments (112) being arranged between adjacent exhaust vent holes (12) in the exhaust vent hole rows (g) respectively, the plurality of first flow channel segments (111) being arranged between adjacent exhaust vent holes (12) in the exhaust vent hole columns (h) and extending towards the second direction (Y) respectively, a first flow channel segment (111) and a second flow channel segment (112) of a same one of the plurality of cooling flow channels (11) being alternately and spaced apart along the second direction (Y), the first flow channel segment (111) and the second flow channel segment (112) of the same one of the plurality of cooling flow channels (11) being connected by a switching segment (113) of the same one of the plurality of cooling flow channels (11).

2. The liquid cold plate of claim 1, wherein, each of the plurality of switching segments (113) extends along a circular arc line in a plane of the liquid cooling plate body (1).

3. The liquid cold plate of claim 1, wherein, each of the plurality of second flow channel segments (112) has a flow channel cross-sectional area greater than that of each of the plurality of first flow channel segments (111).

4. The liquid cold plate of claim 3, wherein, from one end of one of the plurality of switching segments (113) connected to one of the plurality of first flow channel segments (111) to an end of the one of the plurality of switching segments (113) connected to one of the plurality of second flow channel segments (112), a flow channel cross-sectional area of the one of the plurality of switching segments (113) gradually increases.

5. The liquid cold plate of any of claims 1-4, wherein, the liquid cooling plate body (1) is provided with a total liquid inlet (13) and a total liquid outlet (14), and each of the plurality of cooling flow channels (11) is in communication with the total liquid inlet (13) and the total liquid outlet (14). The liquid cooling plate body (1) has a first end (17) and a second end (18) oppositely arranged along the second direction (Y), the first end (17) of the liquid cooling plate body (1) is provided with a first adapter flow channel group (15), and the second end (18) is provided with a second adapter flow channel group (16), one end of each of the plurality of cooling flow channels (11) is communicated with the first adapter flow channel group (15), and the other end is communicated with the second adapter flow channel group (16); The total liquid inlet (13) is communicated with the first adapter flow channel group (15), and the total liquid outlet (14) is communicated with the first adapter flow channel group (15) or the second adapter flow channel group (16).

6. The liquid cold plate of claim 5, wherein, The total liquid inlet (13) and the total liquid outlet (14) are both communicated with the first adapter flow channel group (15), the liquid cooling plate further comprises an inlet and outlet liquid buckle plate (2), an inlet liquid connector (3) and an outlet liquid connector (4), the inlet and outlet liquid buckle plate (2) is buckled on the liquid cooling plate body (1), and an inlet liquid cavity (5) and an outlet liquid cavity (6) are formed between the liquid cooling plate body (1) and the inlet and outlet liquid buckle plate (2), the total liquid inlet (13) is located in the inlet liquid cavity (5), the total liquid outlet (14) is located in the outlet liquid cavity (6), the inlet liquid connector (3) is connected to the inlet and outlet liquid buckle plate (2) and communicated with the inlet liquid cavity (5), and the outlet liquid connector (4) is connected to the inlet and outlet liquid buckle plate (2) and communicated with the outlet liquid cavity (6).

7. The liquid cold plate of claim 1, wherein, The liquid cooling plate body (1) has a third end (19) along the first direction (X), and two of the plurality of cooling flow channels (11) closest to the third end (19) in the first direction (X) have a shared first flow channel section (111).

8. A battery pack, wherein, The liquid cooling plate comprises the liquid cooling plate according to any one of claims 1-7, and further comprises: A box body (10) comprising a cover plate (101), a bottom plate (102) and a side beam (103), the cover plate (101), the bottom plate (102) and the side beam (103) form a containing cavity (h), and the liquid cooling plate is arranged in the containing cavity (h); A battery pack (20) arranged in the containing cavity (h), the battery pack (20) is composed of a plurality of battery monomers (201) arranged in an array, the battery monomer (201) has a shell (2011), the shell (2011) has a first surface (20111), the first surface (20111) faces the liquid cooling plate body (1), and the first surface (20111) is provided with a first explosion-proof valve (20112), and the first explosion-proof valve (20112) is projected on the liquid cooling plate body (1) and located in the corresponding exhaust through hole (12).

9. The battery pack of claim 8, wherein, The liquid cooling plate divides the containing cavity (h) into a first containing cavity (200) and a second containing cavity (100); The first containing cavity (200) is used for containing the battery pack (20); The liquid cooling plate divides the containing cavity (h) into a first containing cavity (200) and a second containing cavity (100); The first explosion-proof valve (20112) is configured to respond to the battery monomer (201) and burst to pass the exhaust inside the battery monomer (201); the second containing cavity (100) is used to collect the exhaust, and the exhaust enters the second containing cavity (100) through the exhaust vent hole (12); The battery pack further comprises: A support plate (30); The liquid cooling plate body (1) and the bottom plate (102) constitute at least part of the wall surface of the second containing cavity (100), the support plate (30) is clamped between the bottom plate (102) and the liquid cooling plate body (1), and the support plate (30) protrudes in a direction close to the liquid cooling plate body (1) and is provided with a plurality of abutting portions (301) arranged at intervals along the first direction (X), and the plurality of abutting portions (301) abut the liquid cooling plate body (1).

10. The battery pack of claim 9, wherein, The abutting portion (301) is at least partially clamped between adjacent cooling flow channels (11) in the plurality of cooling flow channels (11).

11. The battery pack of claim 10, wherein, The plurality of abutting portions (301) are arranged staggered with the plurality of exhaust vent holes (12), and the plurality of abutting portions (301) are at least partially clamped between two adjacent second flow channel segments (112) along the first direction (X) in the plurality of second flow channel segments (112).

12. The battery pack of claim 11, wherein, The two adjacent second flow channel segments (112) are also respectively connected with two transfer segments (113) in the plurality of transfer segments (113) on the same side. The plurality of abutting portions (301) are also partially clamped between adjacent transfer segments (113) in the plurality of transfer segments (113).

13. The battery pack of claim 12, wherein, The support plate (30) further comprises a plurality of support portions (302), the plurality of support portions (302) are respectively arranged between adjacent abutting portions (301) in the plurality of abutting portions (301) and abut the bottom plate (102), and gaps exist between the plurality of support portions (302) and the liquid cooling plate body (1).

14. The battery pack of claims 9-13, wherein, The support plate (30) extends along the first direction (X), and a plurality of support plates (30) are arranged at intervals along the second direction (Y).

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