Liquid cooling plate and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses 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 liquid cooling plate has a first direction and a second direction which intersect. The exhaust through holes form an exhaust through hole array, and the exhaust through hole array comprises exhaust through hole rows distributed at intervals in the first direction and exhaust through hole columns distributed at intervals in the second direction. The multiple cooling flow channels are arranged at intervals in the first direction. The cooling flow channel comprises a first flow channel section, a second flow channel section and a switching section, and the second flow channel section is arranged between the adjacent exhaust through holes in the exhaust through hole row. The first flow channel sections are arranged between the adjacent exhaust through holes in the exhaust through hole rows. The first flow channel sections and the second flow channel sections in the same cooling flow channel are alternately arranged at intervals in the second direction, and the first flow channel sections and the second flow channel sections are connected through switching sections.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a liquid cooling plate and battery pack. Background Technology

[0002] Battery packs used in new energy vehicles typically consist of multiple battery cells, each equipped with an explosion-proof valve. When a battery cell experiences thermal runaway, the valve bursts, releasing ejected material (such as high-temperature, high-pressure gases or molten material). If this material is allowed to spread among other battery cells, its high-temperature, high-pressure characteristics can affect the stability of those cells and even cause thermal propagation safety issues. Existing technologies address this problem by designing venting channels within the battery pack. These channels are separated from the battery cell area by partitions. By incorporating vent holes in these partitions, ejected material can easily enter the venting channels during a battery cell valve burst and be dispersed, thus mitigating the negative impact of the high-temperature, high-pressure ejected material on other battery cells. To further reduce the temperature of ejected material during thermal runaway of individual battery cells, some existing battery packs directly use liquid cooling plates as venting channels. Venting holes are located on the liquid cooling plates, and the explosion-proof valves of the individual battery cells correspond to the central axis of the individual battery cells and the venting holes. However, the cooling channels on the liquid cooling plates need to be offset from the venting holes, meaning that the cooling channels can only pass through the edges of the venting holes. This results in the liquid cooling plates only cooling the edges of the individual battery cells, leading to poor cooling performance.

[0003] Therefore, there is an urgent need for a liquid cooling plate and battery pack to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a liquid cooling plate and battery pack to improve the cooling effect of the liquid cooling plate on the battery pack.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liquid cooling plate includes a liquid cooling plate body, wherein the liquid cooling plate body is provided with a plurality of cooling channels and a plurality of exhaust holes, the cooling channels and the exhaust holes are spaced apart, and the liquid cooling plate has intersecting first and second directions;

[0007] The exhaust vents penetrate the liquid cooling plate body in the thickness direction, and a plurality of exhaust vents form an exhaust vent array. The exhaust vent array includes rows of exhaust vents spaced apart along the first direction and columns of exhaust vents spaced apart along the second direction.

[0008] The cooling channels are disposed within the liquid cooling plate body, and a plurality of the cooling channels are spaced apart along the first direction;

[0009] The cooling channel includes multiple first channel segments, multiple second channel segments, and multiple transition segments. The second channel segments are disposed between adjacent exhaust holes in the exhaust hole row. The first channel segments are disposed between adjacent exhaust holes in the exhaust hole column and extend in the second direction. The first channel segments and second channel segments in the same cooling channel are alternately and spaced apart along the second direction, and adjacent first channel segments and second channel segments are connected by the transition segments.

[0010] As an improvement to the above technical solution, the transition section extends along an arc on the plane of the liquid cooling plate body.

[0011] As an improvement to the above technical solution, the cross-sectional area of ​​the second flow channel section is larger than that of the first flow channel section.

[0012] As an improvement to the above technical solution, the cross-sectional area of ​​the flow channel of the transition section gradually increases from the end where the transition section is connected to the first flow channel section to the end where the transition section is connected to the second flow channel section.

[0013] As an improvement to the above technical solution, the liquid cooling plate body is provided with a total liquid inlet and a total liquid outlet, and each of the cooling channels can be connected to the total liquid inlet and the total liquid outlet; the liquid cooling plate body has a first end and a second end arranged opposite to each other along the second direction, the first end of the liquid cooling plate body is provided with a first transition channel group, the second end is provided with a second transition channel group, and each of the cooling channels is connected at one end to the first transition channel group and at the other end to the second transition channel group;

[0014] The main inlet is connected to the first transfer channel group, and the main outlet is connected to either the first transfer channel group or the second transfer channel group.

[0015] As an improvement to the above technical solution, both the main liquid outlet and the main liquid inlet are connected to the first transfer channel assembly. The liquid cooling plate also includes an inlet / outlet fastener, an inlet connector, and an outlet connector. The inlet / outlet fastener is fastened to the liquid cooling plate body and forms an inlet cavity and an outlet cavity with the liquid cooling plate body. The main liquid inlet is located in the inlet cavity, and the main liquid outlet is located in the outlet cavity. The inlet connector is connected to the inlet / outlet fastener and is connected to the inlet cavity. The outlet connector is connected to the outlet cavity and is connected to the outlet cavity.

[0016] As an improvement to the above technical solution, the liquid cooling plate body has a third end along the first direction, and the two cooling channels closest to the third end in the first direction share a common first channel segment.

[0017] A battery pack, comprising the liquid cooling plate described in any one of the preceding claims, further comprising:

[0018] The housing includes a cover plate, a bottom plate, and side beams, which together form a receiving cavity, and the liquid cooling plate is disposed within the receiving cavity;

[0019] A battery pack is disposed within the receiving cavity. The battery pack is composed of multiple battery cells arranged in an array. Each battery cell has a housing. The housing has a first side facing the liquid cooling plate body. The first side is provided with a first explosion-proof valve. The orthographic projection of the first explosion-proof valve on the liquid cooling plate body is located in the corresponding exhaust vent.

[0020] As an improvement to the above technical solution, the liquid cooling plate divides the receiving cavity into a first receiving cavity and a second receiving cavity;

[0021] The first receiving cavity is used to receive the battery pack;

[0022] The first explosion-proof valve is configured to respond to the battery cell and burst open to allow the discharge from inside the battery cell to pass through; the second receiving cavity is used to collect the discharge, which enters the second receiving cavity through the vent hole;

[0023] The battery pack also includes:

[0024] Support plate;

[0025] The liquid cooling plate body and the base plate constitute at least part of the wall surface of the second receiving cavity. The support plate is sandwiched between the base plate and the liquid cooling plate body. The support plate has a plurality of abutment portions that are spaced apart along the first direction and protrude toward the liquid cooling plate body. The abutment portions abut against the liquid cooling plate body.

[0026] As an improvement to the above technical solution, the abutting portion is at least partially sandwiched between adjacent cooling channels.

[0027] As an improvement to the above technical solution, the abutting part is offset from the exhaust hole, and the abutting part is at least partially clamped between two adjacent second flow channel segments along the first direction.

[0028] As an improvement to the above technical solution, the adjacent second flow channel sections are also connected to the transition sections on the same side;

[0029] The abutting portion is also partially clamped between adjacent transition sections.

[0030] As an improvement to the above technical solution, the support plate further includes a support portion, which is disposed between adjacent abutment portions and abuts against the bottom plate, and there is a gap between the support portion and the liquid cooling plate body.

[0031] As an improvement to the above technical solution, the support plate extends along the first direction, and multiple support plates are provided, with the multiple support plates spaced apart along the second direction.

[0032] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0033] When the liquid cooling plate of this invention is installed inside a battery pack, each vent corresponds to a single battery cell. In the event of thermal runaway in a battery cell, ejected material is discharged through the corresponding vent. The length direction of the battery cell is along a second direction. A first flow channel segment extending along the second direction is provided between each pair of adjacent vents in a row of vents, and a second flow channel segment is provided between each pair of adjacent vents in a row of vents. The second flow channel segments are connected to the first flow channel segments via a transition segment. The first and second flow channel segments of the same cooling channel are alternately arranged along the second direction and spaced apart. This ensures that each battery cell corresponding to a vent is cooled by at least one first flow channel segment, one second flow channel segment, and one transition segment. Most battery cells are cooled by two adjacent first flow channel segments, one second flow channel segment, and two adjacent transition segments, resulting in a better cooling effect for each battery cell in the battery pack. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate provided in this embodiment of the utility model;

[0035] Figure 2 This is a schematic diagram of a portion of the structure of the liquid cooling plate provided in this embodiment of the utility model. Figure 1 ;

[0036] Figure 3 This is a schematic diagram of a portion of the structure of the liquid cooling plate provided in this embodiment of the utility model. Figure 2 ;

[0037] Figure 4 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0038] Figure 5 This is an exploded view of the battery pack provided in an embodiment of this utility model;

[0039] Figure 6 This is a schematic diagram of a portion of the structure of the battery pack provided in this embodiment of the utility model. Figure 1 ;

[0040] Figure 7This is a schematic diagram of the structure of the support plate of the battery pack provided in this embodiment of the utility model;

[0041] Figure 8 This is a schematic diagram of a portion of the structure of the battery pack provided in this embodiment of the utility model. Figure 2 ;

[0042] Figure 9 yes Figure 8 Enlarged view of point A in the middle;

[0043] Figure 10 A schematic diagram of the structure of the separator group of the battery pack provided in this embodiment of the utility model;

[0044] Figure 11 This is a cross-sectional view of a portion of the structure of the battery pack provided in this embodiment of the present invention;

[0045] Figure 12 yes Figure 11 Enlarged view of point B in the middle.

[0046] In the picture:

[0047] 1. Liquid cooling plate body; 11. Cooling channel; 111. First channel section; 112. Second channel section; 113. Transition section; 12. Exhaust vent; 13. Main liquid inlet; 14. Main liquid outlet; 15. First transition channel group; 16. Second transition channel group;

[0048] 2. Liquid inlet / outlet latches;

[0049] 3. Liquid inlet connector; 4. Liquid outlet connector;

[0050] 10. Housing; 101. Cover plate; 102. Bottom plate; 103. Side beam; 1031. First connecting hole; 1032. Second explosion-proof valve; 1033. Exhaust space; 1034. Protective cover; 20. Battery pack; 30. Support plate; 301. Abutment part; 302. Support part; 40. Thermally conductive sealing layer; 401. Spare sheet assembly; 4011. Spare sheet; 40111. Weak area; 402. Adhesive layer; 50. CCS module;

[0051] 100. Second receiving cavity;

[0052] X, the first direction; Y, the second direction. Detailed Implementation

[0053] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0054] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0057] like Figures 1-3As shown, this embodiment provides a liquid-cooled plate, including a liquid-cooled plate body 1. The liquid-cooled plate body 1 has multiple cooling channels 11 and multiple exhaust holes 12, which are spaced apart. The liquid-cooled plate has intersecting first direction X and second direction Y. The exhaust holes 12 penetrate the liquid-cooled plate body 1 in the thickness direction, and the multiple exhaust holes 12 form an exhaust hole array. The exhaust hole array includes rows of exhaust holes spaced apart along the first direction X and columns of exhaust holes spaced apart along the second direction Y. The cooling channels 11 are disposed within the liquid-cooled plate body 1, and the multiple cooling channels 11 are spaced apart along the first direction X. The cooling channel 11 includes multiple first channel sections 111, multiple second channel sections 112, and multiple transition sections 113. The second channel sections 112 are disposed between adjacent exhaust holes 12 in the exhaust hole row. The first channel sections 111 are disposed between adjacent exhaust holes 12 in the exhaust hole column and extend in the second direction Y. The first channel sections 111 and the second channel sections 112 of the same cooling channel 11 are alternately and spaced apart along the second direction Y. The first channel sections 111 and the second channel sections 112 are connected by the transition sections 113.

[0058] When the liquid cooling plate provided in this embodiment is installed in the battery pack, each vent corresponds to a battery cell. When the battery cell experiences thermal runaway, the ejected material is discharged through the corresponding vent 12. The length direction of the battery cell is along the second direction Y. A first flow channel section 111 extending along the second direction Y is provided between each two adjacent exhaust holes 12 in the exhaust hole row, and a second flow channel section 112 is provided between each two adjacent exhaust holes 12 in the exhaust hole row. Adjacent second flow channel sections 112 and first flow channel sections 111 are connected by a transition section 113. The first flow channel sections 111 and second flow channel sections 112 of the same cooling flow channel 11 are alternately and spaced apart along the second direction, so that each battery cell 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 transition section 113. Most of the battery cells can be cooled by two adjacent first flow channel sections 111, one second flow channel section 112 and two adjacent transition sections 113, so that the cooling plate can have a better cooling effect on each battery cell in the battery pack 20.

[0059] Specifically, the second flow channel segment 112 is located between two adjacent exhaust holes 12 within the exhaust hole row. Specifically, it refers to a rectangular area formed by connecting the endpoints of the two side lines of two adjacent exhaust holes 12 within the same exhaust hole row, with the width of the exhaust hole 12 along the first direction X as its side line. The second flow channel segment 112 is located within this rectangular area. Similarly, the first flow channel segment 111 is located between two adjacent exhaust holes 12 within the exhaust hole column. Specifically, it refers to a rectangular area formed by connecting the endpoints of the two side lines of two adjacent exhaust holes 12 within the same exhaust hole column, with the width of the exhaust hole 12 along the second direction as its side line.

[0060] Optionally, the transition section 113 is connected to the first flow channel section 111 by an arc; and / or the transition section 113 is connected to the second flow channel section 112 by an arc. That is, on the plane where the liquid cooling plate body 1 is located, the transition section 113 extends along an arc. Arc connections help reduce flow resistance; therefore, the transition section 113 and the first flow channel section 111, as well as the transition section 113 and the second flow channel section 112, can be partially or completely connected by arcs to reduce the flow resistance of the cooling channel 11. Preferably, as... Figure 3 As shown, the transition section 113 is connected to the first flow channel section 111 and the transition section 113 is connected to the second flow channel section 112 by arcs, so that the transition section 113 has low flow resistance between the transition section 113 and the first flow channel section 111 and the transition section 113 and the second flow channel section 112.

[0061] Optionally, such as Figure 3 As shown, the cross-sectional area of ​​the second flow channel section 112 is larger than that of the first flow channel section 111. Since the first flow channel section 111 is located between two adjacent exhaust holes 12 within the exhaust hole row, and to ensure the exhaust effect of the exhaust holes 12, the exhaust holes 12 need to maintain a large size, resulting in a small space between two adjacent exhaust holes 12 within the exhaust hole row. Due to this limited space, the cross-sectional area of ​​the first flow channel section 111 is relatively small. In contrast, the arrangement of the second flow channel section 112 is less constrained than that of the first flow channel section 111. Therefore, the cross-sectional area of ​​the second flow channel section 112 can be appropriately increased, making it larger than that of the first flow channel section 111, which helps to reduce the overall flow resistance of the cooling channel 11.

[0062] Furthermore, such as Figure 3As shown, from the end where the transition section 113 connects to the first flow channel section 111 to the end where the transition section 113 connects to the second flow channel section 112, the cross-sectional area of ​​the flow channel in the transition section 113 gradually increases. The gradually changing cross-sectional area of ​​the flow channel in the transition section 113 helps to further reduce the flow resistance of the coolant flowing from the first flow channel section 111 to the second flow channel section 112, and the flow resistance of the coolant flowing from the second flow channel section 112 to the first flow channel section 111.

[0063] The gradual change in the cross-sectional area of ​​the transition section 113 means that the cross-sectional area of ​​the flow channel increases or decreases along a certain linear ratio.

[0064] Optionally, such as Figure 2 As shown, the liquid cooling plate body 1 is provided with a main liquid inlet 13 and a main liquid outlet 14. Each cooling channel 11 can be connected to the main liquid inlet 13 and the main liquid outlet 14. The coolant enters the cooling channel 11 through the main liquid inlet 13 and flows out through the main liquid outlet 14.

[0065] Furthermore, such as Figure 2 and Figure 3 As shown, the liquid cooling plate body 1 has a first end and a second end arranged opposite to each other along the second direction Y. The first end of the liquid cooling plate body 1 is provided with a first transition channel group 15, and the second end is provided with a second transition channel group 16. Each cooling channel 11 is connected at one end to the first transition channel group 15 and at the other end to the second transition channel group 16. The first transition channel group 15 and the second transition channel group 16 cooperate to make the cooling channels 11 interconnected to form a whole. The main liquid inlet 13 is connected to the first transition channel group 15, and the main liquid outlet 14 is connected to either the first transition channel group 15 or the second transition channel group 16. For the various cooling channels 11 that are interconnected to form a whole, the main liquid inlet 13 and the main liquid outlet 14 can be set at the same end of the liquid cooling plate body 1, that is, both are connected to the first transition channel group 15, or they can be set at both ends of the liquid cooling plate body 1, that is, the main liquid inlet 13 is connected to the first transition channel group 15, and the main liquid outlet 14 is connected to the second transition channel group 16.

[0066] Furthermore, such as Figure 2As shown, both the main liquid outlet 14 and the main liquid inlet 13 are connected to the first transfer channel group 15. The liquid cooling plate also includes an inlet / outlet clamping plate 2, an inlet connector 3, and an outlet connector 4. The inlet / outlet clamping plate 2 is fastened to the liquid cooling plate body 1 and forms an inlet cavity and an outlet cavity with the liquid cooling plate body 1. The main liquid inlet 13 is located in the inlet cavity, and the main liquid outlet 14 is located in the outlet cavity. The inlet connector 3 is connected to the inlet / outlet clamping plate 2 and is connected to the inlet cavity. The outlet connector 4 is connected to the outlet cavity and is connected to the outlet cavity. To reduce the overall thickness of the battery pack, the liquid cooling plate body 1 is typically thin, making it difficult to directly connect the inlet connector 3 and outlet connector 4 to the liquid cooling plate body 1. Therefore, an inlet / outlet latch 2 is needed to connect the inlet connector 3 and outlet connector 4 to the liquid cooling plate body 1. The main outlet 14 and main inlet 13 are located at the same end of the liquid cooling plate body 1, so that only one inlet / outlet latch 2 is needed to simultaneously meet the connection requirements of the inlet connector 3 and outlet connector 4. In this embodiment, the liquid cooling plate body 1 has two main inlets 13 and one main outlet 14, both of which are connected to the inlet chamber.

[0067] Optionally, such as Figure 3 As shown, the liquid cooling plate body 1 has a third end along the first direction X. The two cooling channels 11 closest to the third end along the first direction X share a common first channel segment 111. In this embodiment, a first channel segment 111 is provided between each pair of adjacent exhaust holes 12 along the first direction X. That is, the number of first channel segments 111 corresponding to each exhaust hole row is one less than the number of exhaust holes 12 in the exhaust hole row. In this embodiment, a second channel segment 112 is provided between each pair of adjacent exhaust holes 12 along the second direction Y. That is, the total number of first channel segments 111 between each exhaust hole 12 in each exhaust hole row is one less than the total number of second channel segments 112 on one side of the exhaust hole row along the first direction X. Therefore, in this embodiment, the two cooling channels 11 closest to the third end along the first direction X share a common first channel segment 111, ensuring that each second channel segment 112 can be connected to the first channel segment 111.

[0068] like Figures 4-12 As shown, this embodiment also provides a battery pack, including the aforementioned liquid cooling plate, as well as a housing 10 and a battery pack 20. The housing 10 includes a cover plate 101, a bottom plate 102, and a side beam 103. The cover plate 101, bottom plate 102, and side beam 103 form a receiving cavity, and the liquid cooling plate is disposed within the receiving cavity. The battery pack 20 is disposed within the receiving cavity. The battery pack 20 is composed of multiple battery cells arranged in an array. Each battery cell has a shell, and the shell has a first surface facing the liquid cooling plate body 1. The first surface is provided with a first explosion-proof valve, and the orthogonal projection of the first explosion-proof valve on the liquid cooling plate body 1 is located within the corresponding vent hole 12.

[0069] Furthermore, the liquid cooling plate divides the receiving cavity into a first receiving cavity and a second receiving cavity 100; the first receiving cavity is used to receive the battery pack 20; the first explosion-proof valve is configured to respond to the battery cell and burst open to allow the discharge inside the battery cell to pass through; the second receiving cavity 100 is used to collect the discharge, which enters the second receiving cavity 100 through the exhaust port 12.

[0070] Optionally, such as Figures 5-9 As shown, the battery pack also includes a support plate 30. The liquid cooling plate body 1 and the base plate 102 constitute at least a portion of the wall surface of the second receiving cavity 100. The support plate 30 is sandwiched between the base plate 102 and the liquid cooling plate body 1. The support plate 30 has a plurality of abutment portions 301 protruding in the direction close to the liquid cooling plate body 1 and spaced apart along the first direction X. The abutment portions 301 abut against the liquid cooling plate body 1 to support the liquid cooling plate body 1, so that the second receiving cavity 100 is formed between the liquid cooling plate body 1 and the base plate 102. In this embodiment, the abutment portions 301 are bonded to the liquid cooling plate body 1 with structural adhesive to further improve the stability of the support plate 30 in supporting the cooling plate body.

[0071] Optionally, such as Figure 8 and Figure 9 As shown, the abutment portion 301 is at least partially sandwiched between adjacent cooling channels 11. This allows the abutment portion 301 to provide more stable support for the liquid cooling plate body 1.

[0072] Furthermore, such as Figure 8 and Figure 9 As shown, the abutment portion 301 is offset from the exhaust port 12 to avoid the abutment portion 301 blocking the exhaust port 12 and affecting the exhaust of the exhaust port 12. Furthermore, the abutment portion 301 is at least partially sandwiched between two adjacent second flow channel sections 112 along the first direction X. No cooling flow channel 11 is provided in the area between the two adjacent second flow channel sections 112, and the abutment portion 301's support at this location will not cause the cooling flow channel 11 to collapse. Additionally, transition sections 113 are respectively connected to the same side of adjacent second flow channel sections 112. The abutment portion 301 is also partially sandwiched between adjacent transition sections 113. This arrangement further improves the stability of the abutment portion 301's support for the liquid cooling plate body 1, and similarly, it will not block the exhaust port 12 or cause the cooling flow channel 11 to collapse. The zigzag shape formed by the second flow channel section 112 and the two adjacent transition sections 113 provides a positioning shape for the abutment part 301. The abutment part 301 conforms to the shape of the zigzag flow channel, and the two adjacent zigzag flow channels jam one abutment part 301, so that the liquid cooling plate body 1 and the support plate 30 will not move relative to each other along the first direction X and the second direction Y.

[0073] Optionally, such as Figures 5-9As shown, the support plate 30 also includes a support portion 302, which is disposed between adjacent abutment portions 301 and abuts against the base plate 102. There is a gap between the support portion 302 and the liquid cooling plate body 1. This gap is designed to allow the ejected material to pass through, so as to avoid the presence of the support plate 30 from obstructing the flow of the ejected material.

[0074] Optionally, such as Figure 6 As shown, the support plate 30 extends along the first direction X, and multiple support plates 30 are provided. The multiple support plates 30 are spaced apart along the second direction Y. The multiple spaced support frames can make the liquid cooling plate body 1 more uniformly stressed.

[0075] Optionally, such as Figure 11 and Figure 12 As shown, a first connecting hole 1031 is provided on the side beam 103, connecting the outside of the housing 10 to the second receiving cavity 100. A second explosion-proof valve 1032 is provided inside the first connecting hole 1031. When a battery cell experiences thermal runaway, the first explosion-proof valve breaks, and the ejected material generated by the battery cell enters the second receiving cavity 100 through the broken first explosion-proof valve and the corresponding exhaust port 12. The pressure inside the second receiving cavity 100 increases. When the pressure inside the second receiving cavity 100 increases to a certain level, the second explosion-proof valve 1032 on the side beam 103 breaks, and the ejected material can be discharged from the battery pack through the first connecting hole 1031. The first connecting hole 1031, located on the side beam 103, can prevent the ejected material from being ejected upwards into the driver's cab, thereby improving vehicle safety.

[0076] Furthermore, such as Figure 11 and Figure 12 As shown, the side beam 103 is also provided with an exhaust space 1033 communicating with the second receiving cavity 100, and the first connecting hole 1031 communicates with the second receiving cavity 100 through the exhaust space 1033. By setting the exhaust space 1033 to connect the second receiving cavity 100 and the first connecting hole 1031, the position of the first connecting hole 1031 can be selected as needed, instead of being located in the lower region of the liquid cooling plate body 1 like the exhaust space 1033, which is beneficial to reducing the overall thickness of the battery pack. In this embodiment, the first connecting hole 1031 is located above the liquid cooling plate body 1, the second receiving cavity 100 extends to the lower part of the exhaust space 1033, and the bottom of the exhaust space 1033 communicates with the second receiving cavity 100.

[0077] Furthermore, multiple first connecting holes 1031 are provided, spaced apart along the extension direction of the side beam 103. The second explosion-proof valve 1032 and the exhaust space 1033 are each corresponding to one of the first connecting holes 1031. The multiple first connecting holes 1031, in conjunction with the corresponding second explosion-proof valve 1032 and exhaust space 1033, ensure that in the event of thermal runaway of a battery cell at any location, ejected material can be promptly discharged through the first connecting holes 1031.

[0078] Optionally, such as Figure 4 , Figure 11 and Figure 12 As shown, a protective cover 1034 is also provided on the side beam 103. The protective cover 1034 is fixedly installed on the outer wall of the side beam 103 and is provided in a one-to-one correspondence with the first connecting hole 1031. The protective cover 1034 covers the corresponding first connecting hole 1031 and the second explosion-proof valve 1032.

[0079] Optionally, such as Figure 5 and Figure 10 As shown, the battery pack provided in this embodiment also includes a thermally conductive sealing layer 40. The thermally conductive sealing layer 40 includes a group of spacers 401 that are arranged one-to-one with the exhaust vent array. The spacers 401 are disposed on the liquid cooling plate body 1. The spacers 401 include a plurality of spacers 4011 connected in sequence. The spacers 4011 in the spacers 401 are arranged one-to-one with the exhaust vents 12 in the exhaust vent array, and the spacers 4011 cover the corresponding exhaust vents 12. A weak area 40111 is provided on the spacers 4011. The orthogonal projection of the weak area 40111 on the liquid cooling plate body 1 is located in the corresponding exhaust vent 12. When the battery cell experiences thermal runaway, after the first explosion-proof valve breaks open, the ejected material breaks through the weak area 40111 on the corresponding spacer 4011 and then enters the second accommodating cavity through the corresponding exhaust vent 12. Due to the blocking effect of other unbroken separators 4011, the ejected material entering the second accommodating cavity will not return to the first accommodating cavity through other vent holes 12, thereby reducing the impact of the ejected material on other normal battery cells. In this embodiment, the separator 4011 is a mica sheet.

[0080] Furthermore, such as Figure 5 As shown, the thermally conductive sealing layer 40 also includes an adhesive layer 402. The adhesive layer 402 is provided in the area between the liquid cooling plate body 1 and the battery pack 20 where the spacer assembly 401 is not located. The liquid cooling plate body 1 is bonded to the battery pack 20 through the adhesive layer 402, which not only provides a certain degree of fixation for the battery pack 20 but also improves the thermal conductivity between the battery pack 20 and the liquid cooling plate body 1. The adhesive layer 402 can be a thermally conductive structural adhesive or a thermally conductive adhesive.

[0081] Optionally, such as Figure 5As shown, the battery pack provided in this embodiment also includes a CCS component 50, which is disposed between the battery pack 20 and the cover plate 101 and is used for series and parallel connection of battery cells and acquisition of temperature and pressure signals.

[0082] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate includes a liquid cooling plate body (1), on which multiple cooling channels (11) and multiple exhaust holes (12) are provided. The cooling channels (11) and the exhaust holes (12) are spaced apart. The liquid cooling plate has intersecting first direction (X) and second direction (Y). The exhaust through hole (12) penetrates the liquid cooling plate body (1) in the thickness direction, and the plurality of exhaust through holes (12) form an exhaust through hole array. The exhaust through hole array includes rows of exhaust through holes spaced apart along the first direction (X) and columns of exhaust through holes spaced apart along the second direction (Y). The cooling channels (11) are disposed inside the liquid cooling plate body (1), and a plurality of cooling channels (11) are spaced apart along the first direction (X); The cooling channel (11) includes a plurality of first channel segments (111), a plurality of second channel segments (112), and a plurality of transition segments (113). The second channel segments (112) are disposed between adjacent exhaust holes (12) in the exhaust hole row. The first channel segments (111) are disposed between adjacent exhaust holes (12) in the exhaust hole column and extend in the second direction (Y). The first channel segments (111) and the second channel segments (112) of the same cooling channel (11) are alternately and spaced apart along the second direction (Y). The first channel segments (111) and the second channel segments (112) are connected by the transition segments (113).

2. The liquid cooling plate according to claim 1, characterized in that, The transition section (113) extends along an arc on the plane of the liquid cooling plate body (1).

3. The liquid cooling plate according to claim 1, characterized in that, The cross-sectional area of ​​the second flow channel section (112) is larger than that of the first flow channel section (111).

4. The liquid cooling plate according to claim 3, characterized in that, From the end where the transition section (113) connects to the first flow channel section (111) to the end where the transition section (113) connects to the second flow channel section (112), the cross-sectional area of ​​the flow channel of the transition section (113) gradually increases.

5. The liquid-cooled plate according to any one of claims 1-4, characterized in that, The liquid cooling plate body (1) is provided with a total liquid inlet (13) and a total liquid outlet (14), and each of the cooling channels (11) can be connected to the total liquid inlet (13) and the total liquid outlet (14); The liquid cooling plate body (1) has a first end and a second end arranged opposite to each other along the second direction (Y). The first end of the liquid cooling plate body (1) is provided with a first transition channel group (15), and the second end is provided with a second transition channel group (16). Each cooling channel (11) is connected to the first transition channel group (15) at one end and to the second transition channel group (16) at the other end. The main inlet (13) is connected to the first transfer channel group (15), and the main outlet (14) is connected to the first transfer channel group (15) or the second transfer channel group (16).

6. The liquid cooling plate according to claim 5, characterized in that, The main liquid outlet (14) and the main liquid inlet (13) are both connected to the first transfer channel group (15). The liquid cooling plate also includes an inlet / outlet clamping plate (2), an inlet connector (3), and an outlet connector (4). The inlet / outlet clamping plate (2) is fastened to the liquid cooling plate body (1) and forms an inlet cavity and an outlet cavity with the liquid cooling plate body (1). The main liquid inlet (13) is located in the inlet cavity, and the main liquid outlet (14) is located in the outlet cavity. The inlet connector (3) is connected to the inlet / outlet clamping plate (2) and is connected to the inlet cavity. The outlet connector (4) is connected to the outlet cavity and is connected to the outlet cavity.

7. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate body (1) has a third end along the first direction (X), and the two cooling channels (11) closest to the third end in the first direction (X) share a common first channel segment (111).

8. A battery pack, characterized in that, Including the liquid cooling plate according to any one of claims 1-7, further comprising: The housing (10) includes a cover plate (101), a bottom plate (102) and a side beam (103), wherein the cover plate (101), the bottom plate (102) and the side beam (103) form a receiving cavity, and the liquid cooling plate is disposed in the receiving cavity; A battery pack (20) is disposed in the cavity. The battery pack (20) is composed of multiple battery cells arranged in an array. Each battery cell has a housing. The housing has a first surface facing the liquid cooling plate body (1). The first surface is provided with a first explosion-proof valve. The orthographic projection of the first explosion-proof valve on the liquid cooling plate body (1) is located in the corresponding exhaust hole (12).

9. The battery pack according to claim 8, characterized in that, The liquid cooling plate divides the receiving cavity into a first receiving cavity and a second receiving cavity (100); The first receiving cavity is used to receive the battery pack (20); The first explosion-proof valve is configured to respond to the battery cell and burst open to allow the discharge from inside the battery cell to pass through; the second receiving cavity (100) is used to collect the discharge, which enters the second receiving cavity (100) through the exhaust port (12); The battery pack also includes: Support plate (30); The liquid cooling plate body (1) and the base plate (102) constitute at least a portion of the wall surface of the second receiving cavity (100). The support plate (30) is sandwiched between the base plate (102) and the liquid cooling plate body (1). The support plate (30) has a plurality of abutment portions (301) that are spaced apart along the first direction (X) and protrude toward the liquid cooling plate body (1). The abutment portions (301) abut against the liquid cooling plate body (1).

10. The battery pack according to claim 9, characterized in that, The contact portion (301) is at least partially sandwiched between adjacent cooling channels (11).

11. The battery pack according to claim 10, characterized in that, The abutting portion (301) is offset from the exhaust port (12), and the abutting portion (301) is at least partially sandwiched between two adjacent second flow channel segments (112) along the first direction (X).

12. The battery pack according to claim 11, characterized in that, The adjacent second flow channel section (112) is also connected to the transition section (113) on the same side; The abutment portion (301) is also partially sandwiched between adjacent transition sections (113).

13. The battery pack according to claim 12, characterized in that, The support plate (30) further includes a support part (302), which is disposed between adjacent abutting parts (301) and abuts against the bottom plate (102). There is a gap between the support part (302) and the liquid cooling plate body.

14. The battery pack according to any one of claims 9-13, characterized in that, The support plate (30) extends along the first direction (X), and multiple support plates are provided, with the multiple support plates (30) spaced apart along the second direction (Y).

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