Liquid cooling plate and battery

Abstract

The invention relates to a liquid cooling plate and a battery, and relates to the technical field of power batteries. The liquid cooling plate comprises a plate body and at least one separator. A liquid flow cavity is formed in the plate body. And the at least one separator divides the liquid flow cavity into at least two sub-flow channels. Wherein at least one first bending part is arranged on the separator, and when the plate body is pressed, the separator can deform in the thickness direction of the plate body by taking the first bending part as the center. The liquid cooling plate provided by the invention can solve the problem that when the liquid cooling plate in the prior art is applied to a side cooling scheme, the liquid cooling plate is extruded under the expansion action of a battery cell, so that the toxin flow channel is collapsed, and the flow channel overflowing area is influenced.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a liquid cooling plate and a battery. Background Art

[0002] The liquid cooling plate is an important component of the power battery. Taking the power battery and the liquid cooling plate in the prior art as an example, the liquid cooling plate is usually configured as a plate-shaped cavity structure, and a partition structure is arranged in the cavity structure to enclose a flow channel for the coolant to pass through.

[0003] However, when the above liquid cooling plate structure is applied to the side cooling solution, the liquid cooling plate is set on the side of the battery cell. The battery cell will expand to a certain extent during use, and the force of the battery cell expansion will directly act on the liquid cooling plate on the side. At this time, the liquid cooling plate will be pressed and the flow channel will be squeezed, causing the flow channel to deform and partially collapse and block the flow channel, thereby affecting the flow capacity of the flow channel and the overall heat dissipation effect of the liquid cooling plate. Summary of the invention

[0004] The purpose of the present application is to provide a liquid cooling plate and a battery, which can solve the problem in the prior art that when the liquid cooling plate is used in a side cooling solution, the liquid cooling plate will be squeezed under the action of battery cell expansion, resulting in collapse of the toxin flow channel and affecting the flow area of ​​the flow channel.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an embodiment of the present application provides a liquid cooling plate, which includes a plate body and at least one partition. A liquid flow cavity is formed inside the plate body. At least one partition divides the liquid flow cavity into at least two sub-flow channels. Among them, at least one first bending portion is provided on the partition, and when the plate body is under pressure, the partition can be deformed along the thickness direction of the plate body with the first bending portion as the center.

[0006] Based on the above-mentioned embodiments of the present application, the liquid flow cavity in the plate body of the present application is divided into a plurality of sub-flow channels by a partition. In this process, the partition not only plays a role of partition, but also can support the outer wall of the liquid flow cavity. And by the setting of the first bending portion, the partition can be deformed along the thickness direction when under pressure. Through the deformation of the partition when under pressure, on the one hand, the liquid cooling plate can adapt to the expansion and deformation of the battery cell module, so that the two are adapted to each other and avoid damage between the two. At the same time, through the setting of the first bending portion, the partition can be deformed with the first bending portion as the center when under pressure, so that the liquid flow cavity and the sub-flow channel are flattened as a whole, avoiding partial collapse of the liquid flow cavity or the sub-flow channel due to pressure, resulting in blockage of the sub-flow channel, thereby avoiding the influence of the expansion and deformation of the battery cell on the flow efficiency of the liquid flow cavity, and ensuring the heat dissipation effect of the liquid cooling plate.

[0007] In some embodiments, the liquid flow cavity extends along a first direction, the first bending portion bends toward a second direction, and the second direction is perpendicular to the first direction.

[0008] Based on the above-mentioned embodiments of the present application, the extension direction of the liquid flow cavity is the flow direction of the coolant. Therefore, by setting the bending direction of the first bending portion to be perpendicular to the extension direction of the liquid flow cavity, the first bending portion is prevented from affecting the flow direction of the coolant when bending.

[0009] In some embodiments, the partition includes a first partition portion and a second partition portion, the first partition portion and the second partition portion are connected to each other, and a first bending portion is formed at a connection position.

[0010] Based on the above-mentioned embodiments of the present application, the connection position of the first partition and the second partition forms a first bending portion. When the partition is under pressure, the first partition and the second partition approach each other with the first bending portion as the center, so that the partition as a whole is bent. At this time, the liquid cooling plate as a whole tends to be flat.

[0011] In some embodiments, at least two separators are provided, and two adjacent separators can form a diamond structure.

[0012] Based on the above-mentioned embodiments of the present application, through the above-mentioned configuration, a diamond structure is formed by two adjacent partitions, and the diamond structure can deform in a stable manner when subjected to pressure while having a certain supporting effect.

[0013] In some embodiments, the first partition and the second partition are arranged at an angle, and the first partition and the second partition are arranged at an angle with the inner wall of the liquid flow chamber respectively. The first partition and the corresponding inner wall of the liquid flow chamber have an angle α1, 30°≤α1≤45°. The second partition and the corresponding inner wall of the liquid flow chamber have an angle α2, 30°≤α2≤45°.

[0014] Based on the above-mentioned embodiment of the present application, the first partition and the second partition are arranged at an angle to form a first bending portion at the connection position between the two. By setting the first partition and the second partition to be arranged at an angle with the corresponding inner wall of the liquid flow cavity, the direction of the force of the liquid cooling plate when subjected to the expansion force of the battery cell is generally perpendicular to the direction of the inner wall of the liquid flow cavity. Therefore, through the above-mentioned setting, the force direction of the partition is at a certain angle to the first partition and the second partition, so that the first partition and the second partition are deformed toward the inclined side when they are deformed, that is, the deformation direction and deformation degree of the partition are more controllable, thereby further reducing the influence on the flow capacity of the sub-channel. Further, when the length of the first partition and the second partition is determined, the angle between the two and the inner wall of the liquid flow cavity will directly affect the thickness of the liquid cooling plate. When the angle between the first partition and the second partition and the inner wall of the corresponding liquid flow cavity is too small, the rhombus structure formed by the two adjacent partitions is too flat, which makes the liquid cooling plate too thin and affects the flow area on the one hand, and makes the subsequent deformable space of the partition smaller on the other hand. When the angles between the first partition and the second partition and the inner wall of the corresponding liquid flow cavity are too large, the diamond structure will be too slender, which will cause the liquid cooling plate to be too thick, increase the space occupied inside the battery, and affect the energy density of the battery.

[0015] In some embodiments, a connecting rib is provided between two adjacent diamond-shaped structures, the connecting rib is connected to the adjacent first bending portions, and the connecting rib is configured as a retractable structure.

[0016] Based on the above-mentioned embodiments of the present application, the sub-channels can be further separated by setting the connecting ribs, so that the distribution of the coolant in the liquid flow cavity can be more uniform. And by setting the connecting ribs as a retractable structure, such as an elastic rubber material or a wave structure, the compression deformation of the liquid cooling plate will not be affected when the connecting ribs are set.

[0017] In some embodiments, the partition includes a third partition, a fourth partition and a fifth partition. The third partition, the fourth partition and the fifth partition are connected in sequence, and a first bending portion is formed between the third partition and the fourth partition and between the fourth partition and the fifth partition.

[0018] Based on the above-mentioned embodiments of the present application, through the above-mentioned configuration, two bending structures can be formed on the same partition, and when the liquid cooling plate is subjected to pressure as a whole, the partition can bend and deform with the two first bending portions as the center at the same time.

[0019] In some embodiments, the intersection of the inner walls of the two liquid flow chambers extends to form a first intersection portion, the two first intersection portions are respectively arranged at an angle to the corresponding inner walls of the liquid flow chamber, and the two first intersection portions are connected to each other at one end away from the corresponding inner walls of the liquid flow chamber to form a closed liquid flow chamber.

[0020] Based on the above-mentioned embodiments of the present application, by setting the first intersection portion, and setting the two first intersection portions at an angle to the corresponding inner wall of the liquid flow cavity, the connection position of the two first intersection portions can also form a bending structure similar to the first bending portion, so that when under pressure, the end and middle portion of the liquid cooling plate will deform as a whole, rather than only the middle area deforming, thereby avoiding local collapse of the liquid cooling plate and damaging the liquid cooling plate.

[0021] In some embodiments, the liquid cooling plate also includes two collecting pieces, openings are set at both ends of the liquid flow cavity, and the two collecting pieces are respectively set at the openings at both ends of the liquid flow cavity. The two collecting pieces are respectively provided with a liquid inlet and a liquid outlet. One end of the sub-channel is connected to the liquid inlet through a collecting piece, and the other end of the sub-channel is connected to the liquid outlet through another collecting piece.

[0022] Based on the above-mentioned embodiments of the present application, through the provision of two collecting parts, on the one hand, the coolant can be evenly dispersed into each sub-channel when it is flowing in, and on the other hand, the coolant can converge to the outlet when it is flowing out, thereby making the flow in and out process more convenient and smooth, and improving the overall heat dissipation and cooling effect of the liquid cooling plate.

[0023] According to a second aspect of the present application, a battery is provided, the battery comprising a frame, at least two battery cell modules and at least one of the above-mentioned liquid cooling plates. The at least two battery cell modules are respectively arranged in the frame. The liquid cooling plate is arranged on the side of the battery cell module, and a liquid cooling plate is arranged between any two adjacent battery cell modules.

[0024] Based on the above-mentioned embodiments of the present application, the liquid cooling plate is arranged between the battery modules to dissipate heat for the battery modules on both sides at the same time, thereby improving the heat dissipation effect of the battery as a whole. At the same time, through the above-mentioned arrangement of the liquid cooling plate in the present application, the liquid cooling plate can adapt to the state of expansion during the use of the battery module, thereby maintaining a good heat dissipation effect during the use of the battery module, ensuring the safety of the battery during use, and extending the service life of the battery.

[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of the liquid cooling plate provided in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the internal structure of a liquid cooling plate provided in one embodiment of the present application.

[0029] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0030] Figure 4 yes Figure 2 Schematic diagram of the enlarged portion B.

[0031] Figure 5 It is a schematic diagram of the internal structure of a liquid cooling plate provided in another embodiment of the present application.

[0032] Figure 6 yes Figure 5 Enlarged schematic diagram of part C.

[0033] Figure 7 It is a schematic diagram of the internal structure of the liquid cooling plate provided in the third embodiment of the present application.

[0034] Figure 8 It is a schematic diagram of the structure of the battery provided in the embodiment of the present application.

[0035] Fig. 9 It is a partial exploded schematic diagram of a battery provided in an embodiment of the present application.

[0036] Description of Reference Numerals

[0037] 1. Plate body; 11. Liquid flow cavity; 12. Sub-channel; 2. Partition; 21. First partition; 22. Second partition; 23. Third partition; 24. Fourth partition; 25. Fifth partition; 3. Current collector; 31. Liquid inlet; 32. Liquid outlet; 33. Liquid inlet connector; 34. Liquid outlet connector; 4. First bending portion; 5. First junction; 6. Battery cell module; 7. Connecting ribs. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of this application, it should be noted that, in the absence of any contrary explanation, the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The liquid cooling plate is an important component of the power battery. Taking the power battery and the liquid cooling plate in the prior art as an example, the liquid cooling plate is usually configured as a plate-shaped cavity structure, and a partition structure is arranged in the cavity structure to enclose a flow channel for the coolant to pass through.

[0045] However, when the above liquid cooling plate structure is applied to the side cooling solution, the liquid cooling plate is set on the side of the battery cell. The battery cell will expand to a certain extent during use, and the force of the battery cell expansion will directly act on the liquid cooling plate on the side. At this time, the liquid cooling plate will be compressed and the flow channel will be squeezed. The flow channel will deform when squeezed, which may cause part of the flow channel to collapse. For example, the middle part of the flow channel collapses and becomes concave, causing the flow channel to be blocked, thereby affecting the normal flow of the coolant and the heat dissipation effect of the liquid cooling plate.

[0046] In order to solve the above problems in the prior art, according to the first aspect of the present application, the embodiment of the present application provides a liquid cooling plate, referring to Figure 1 and Figure 2 As shown in , the liquid cooling plate includes a plate body 1 and at least one partition 2. A liquid flow cavity 11 is formed inside the plate body 1. At least one partition 2 divides the liquid flow cavity 11 into at least two sub-flow channels 12. Among them, at least one first bending portion 4 is provided on the partition 2, and the partition 2 can be deformed along the thickness direction of the plate body 1 when the plate body 1 is under pressure.

[0047] Based on the above-mentioned embodiments of the present application, the liquid flow cavity 11 in the plate body 1 in the present application is divided into a plurality of sub-flow channels 12 by the partition 2. In this process, the partition 2 not only plays a role of separation, but also can support the outer wall of the liquid flow cavity 11. The partition 2 is arranged to be deformed along the thickness direction when under pressure. Through the deformation of the partition 2 when under pressure, on the one hand, the liquid cooling plate can adapt to the expansion and deformation of the battery cell module 6, so that the two are adapted to each other and damage between the two is avoided.

[0048] At the same time, through the setting of the first bending portion 4, the partition 2 can be deformed with the first bending portion 4 as the center when under pressure, so that the sub-channel 12 is flattened, but at this time the flow area of ​​the sub-channel 12 will not be greatly affected, thereby ensuring the flow efficiency and the heat dissipation effect of the liquid cooling plate.

[0049] Furthermore, in some embodiments of the present application, when the partition 2 is set, it is necessary to divide the liquid flow cavity 11 into multiple sub-channels 12 through the setting of the partition 2. Therefore, when the partition 2 is set, the extension direction of the partition 2 needs to be set along the flow direction of the coolant in the liquid flow cavity 11, generally the length direction of the plate body 1.

[0050] refer to Figure 1 and Figure 2 As shown in , in some embodiments of the present application, the liquid flow cavity 11 may extend along a first direction, the first bending portion 4 bends toward a second direction, and the second direction is perpendicular to the first direction.

[0051] Based on the above-mentioned embodiments of the present application, the extension direction of the liquid flow cavity 11 is the flow direction of the coolant. Therefore, by setting the bending direction of the first bending portion 4 to be perpendicular to the extension direction of the liquid flow cavity 11, the first bending portion 4 is prevented from affecting the flow direction of the coolant when bending.

[0052] In addition, the bending of the above-mentioned first bending portions 4 toward the second direction can specifically include two situations, one is that the bending directions of all the first bending portions 4 are consistent, and the other is that the bending directions of some first bending portions 4 are opposite to the bending directions of other first bending portions 4.

[0053] Furthermore, when the bending direction of some of the first bending portions 4 is opposite to the bending direction of other first bending portions 4, it can be specifically divided into two cases. When there are multiple separators 2, in one case, each separator 2 is provided with a first bending portion 4, and at this time, the bending direction of some of the first bending portions 4 is opposite to the other ones, which may mean that the first bending portions 4 on different separators 2 have different orientations. In another case, each separator 2 may be provided with multiple first bending portions 4, such as two, three, four or even multiple first bending portions 4, and at this time, the bending direction of some of the first bending portions 4 is opposite to the other ones, which may mean that the first bending portions 4 on different separators 2 have different orientations, or it may mean that the multiple first bending portions 4 on the same separator 2 have different orientations.

[0054] In addition, the first direction mentioned above in the present application may correspond to the length direction of the liquid cooling plate, that is, the coolant flows in the liquid cooling plate along the length direction. The second direction may correspond to the width direction of the liquid cooling plate, that is, when the liquid cooling plate is under pressure, the first bending portion 4 is deformed toward the width direction of the liquid cooling plate, so that the liquid cooling plate is extended to a certain extent in the width direction, and also corresponds to the deformation of the liquid cooling plate in the thickness direction, that is, the liquid cooling plate is compressed in the thickness direction and flattened.

[0055] In the present application, the specific structure of the separator 2 can be set in any suitable manner.

[0056] Based on the above disclosure of this application, reference Figure 2 and Figure 3 As shown in , in an exemplary embodiment provided in the present application, the separator 2 includes a first separator 21 and a second separator 22, the first separator 21 and the second separator 22 are connected to each other, and a first bending portion 4 is formed at the connection position.

[0057] Based on the above-mentioned embodiments of the present application, the connection position of the first partition 21 and the second partition 22 forms a first bending portion 4. When the partition 2 is under pressure, the first partition 21 and the second partition 22 approach each other with the first bending portion 4 as the center, so that the partition 2 is bent as a whole. At this time, the liquid cooling plate tends to be flat as a whole.

[0058] Furthermore, in some embodiments of the present application, at least two separators 2 are provided, and two adjacent separators 2 can form a diamond structure.

[0059] Based on the above-mentioned embodiments of the present application, through the above-mentioned arrangement, a diamond structure is formed by two adjacent separators 2. The diamond structure has a certain supporting effect and can be deformed in a stable manner when subjected to pressure.

[0060] Specifically, the above embodiment corresponds to an implementation method in which only one first bent portion 4 is provided on a single separator 2. At this time, when at least two separators 2 are provided, the orientations of the bent portions on the separator 2 can be set to different orientations. By further setting the first bent portions 4 on two adjacent separators 2 to be in opposite orientations, the two adjacent separators 2 are specifically configured to have a diamond structure.

[0061] Furthermore, the diamond structure mentioned above in the present application refers to that the ends of two adjacent separators 2 are respectively connected to the inner wall of the liquid flow chamber 11, and the area between the two constitutes a diamond structure. In a specific configuration, the two separators 2 are respectively connected to the inner walls of the liquid flow chamber 11 on both sides, and the ends of the two separators 2 are connected to each other, thereby forming a diamond structure.

[0062] Alternatively, in some other embodiments of the present application, refer to Figure 3 As shown in the figure, in the specific setting, the connection position between the two partitions 2 and the inner wall of the liquid flow chamber 11 on the same side can be set at a certain distance. At this time, the two partitions 2 cooperate with the two inner walls of the liquid flow chamber 11 on both sides to actually form a hexagonal structure, but because the diamond structure is still using the characteristic of being able to be stably stretched, it can also be regarded as a deformation of the diamond structure.

[0063] In addition, it should be noted that the fact that two adjacent separators 2 can form a diamond structure in the present application does not mean that any two adjacent separators 2 can form a diamond structure, but means that when multiple separators 2 are provided, each two separators 2 form a group to form a diamond structure in a certain order. Figure 3 As shown in , at this time, the first separator 2 and the second separator 2 from left to right cooperate to form a rhombus structure, and then the third separator 2 and the fourth separator 2 cooperate to form a rhombus structure, and the second separator 2 and the third separator 2 form a concave hexagonal structure.

[0064] refer to Figures 2 to 4 As shown in , in some embodiments of the present application, the first partition 21 and the second partition 22 are arranged at an angle, and the first partition 21 and the second partition 22 are arranged at an angle to the inner wall of the liquid flow chamber 11 respectively.

[0065] Based on the above-mentioned embodiment of the present application, the first partition 21 and the second partition 22 are arranged at an angle to form a first bent portion 4 at the connection position of the two. The first partition 21 and the second partition 22 are arranged at an angle to the corresponding inner wall of the liquid flow chamber 11, and the direction of the force acting on the liquid cooling plate when subjected to the expansion force of the battery cell is generally perpendicular to the inner wall direction of the liquid flow chamber 11. Therefore, through the above-mentioned arrangement, the force direction of the partition 2 is at a certain angle to the first partition 21 and the second partition 22, so that the first partition 21 and the second partition 22 are deformed toward the inclined side, that is, the deformation direction and deformation degree of the partition 2 are more controllable, thereby further reducing the impact on the flow capacity of the sub-channel 12.

[0066] In some embodiments, the first partition 21 and the inner wall of the corresponding liquid flow chamber 11 have an angle α1, 30°≤α1≤45°. The second partition 22 and the inner wall of the corresponding liquid flow chamber 11 have an angle α2, 30°≤α2≤45°.

[0067] Based on the above-mentioned embodiments of the present application, when the lengths of the first partition 21 and the second partition 22 are determined, the angle between the two and the inner wall of the corresponding liquid flow chamber 11 will directly affect the thickness of the liquid cooling plate. When the angle between the first partition 21 and the second partition 22 and the inner wall of the corresponding liquid flow chamber 11 is too small, the diamond structure formed by the two adjacent partitions 2 is too flat, which on the one hand causes the liquid cooling plate to be too thin, affecting the flow area, and on the other hand makes the subsequent deformable space of the partition 2 smaller. When the angle between the first partition 21 and the second partition 22 and the inner wall of the liquid flow chamber 11 is too large, the diamond structure will be too slender, which will cause the liquid cooling plate to be too thick, increase the space occupied by the battery, and affect the energy density of the battery.

[0068] Furthermore, the angle between the first partition 21 and the second partition 22 and the inner wall of the corresponding liquid flow chamber 11 will also affect the anti-deformation ability of the partition 2 when it is squeezed. For example, when the angle between the first partition 21 and the second partition 22 and the inner wall of the corresponding liquid flow chamber 11 is set too small, the diamond structure formed by the two adjacent partitions 2 is too flat, and the liquid cooling plate will be compressed and deformed when subjected to a small force, which may cause the liquid cooling plate to deform during normal production and use, making the strength of the liquid cooling plate unable to meet the use requirements.

[0069] In summary, the specific values ​​of the angle α1 between the first partition 21 and the inner wall of the liquid flow chamber 11 and the angle α2 between the second partition 22 and the inner wall of the liquid flow chamber 11 can be set according to factors such as the specific structure and strength requirements of the liquid cooling plate, and this application does not impose any specific restrictions on this.

[0070] refer to Figure 5 and Figure 6 As shown in FIG. 1 , in another exemplary embodiment provided by the present application, the partition 2 may include a third partition 23, a fourth partition 24, and a fifth partition 25. The third partition 23, the fourth partition 24, and the fifth partition 25 are connected in sequence, and a first bending portion 4 is formed between the third partition 23 and the fourth partition 24 and between the fourth partition 24 and the fifth partition 25, respectively.

[0071] Based on the above embodiments of the present application, through the above settings, two first bending portions 4 can be formed on the same partition 2, and when the liquid cooling plate is under pressure as a whole, the partition 2 can bend and deform with the two first bending portions 4 as the center at the same time.

[0072] Specifically, based on the above configuration, the partition 2 composed of the third partition 23, the fourth partition 24 and the fifth partition 25 is configured as an S-shaped structure as a whole. When configured, the third partition 23 and the fifth partition 25 are respectively connected to the inner wall of the liquid flow chamber 11, and the positions where the third partition 23 and the fifth partition 25 are respectively connected to the fourth partition 24 can be rounded to further enhance the connection strength of the connection position.

[0073] Further, refer to Figure 6 As shown in , in some embodiments of the present application, the angle between the third partition 23 and the corresponding inner wall of the liquid flow chamber 11 is α3, 30°≤α3≤45°, and the angle between the fifth partition 25 and the corresponding inner wall of the liquid flow chamber 11 is α4, 30°≤α4≤45°.

[0074] Based on the above-mentioned embodiments of the present application, by limiting the angles between the third partition 23 and the fifth partition 25 and the corresponding inner walls of the liquid flow cavity 11, on the one hand, the thickness of the liquid cooling plate can be set within an appropriate range, and on the other hand, the deformation resistance of the partition 2 is within an appropriate range.

[0075] At the same time, the angles between the third partition 23 and the fifth partition 25 and the corresponding inner walls of the liquid flow cavity 11 can be set to the same angle. At this time, the third partition 23 and the fifth partition 25 are arranged parallel to each other, so that when the liquid cooling plate is deformed by the expansion force of the battery cell, the deformation degrees of the third partition 23 and the fifth partition 25 are relatively close, that is, when the liquid cooling plate and the partition 2 are deformed, they are uniformly deformed from both sides in the thickness direction to the middle, so that the deformation process is more stable and controllable, avoiding damage to the liquid cooling plate.

[0076] Furthermore, in some embodiments of the present application, reinforcing protrusions may be provided at the intersection of the third partition 23 and the fourth partition 24 and at the intersection of the fourth partition 24 and the fifth partition 25, so that the partition 2 is set as an S-shaped structure so that it maintains a certain strength.

[0077] refer to Figure 7 As shown in the third embodiment provided in the present application, the separator 2 includes a first separator 21 and a second separator 22, two adjacent separators 2 form a rhombus structure, and a connecting rib 7 is arranged between the two adjacent rhombus structures, and the connecting rib 7 can be connected to the position of the adjacent first bending portion 4, and the connecting rib 7 is arranged to be a retractable structure.

[0078] Based on the above-mentioned embodiments of the present application, the sub-channels 12 can be further divided by setting the connecting ribs 7, so that the distribution of the coolant in the liquid flow cavity 11 can be more uniform. By setting the connecting ribs 7 as a retractable structure, such as an elastic rubber material or a wave structure, the connecting ribs 7 will not affect the compression deformation of the liquid cooling plate.

[0079] refer to Figure 4 As shown in , in some embodiments of the present application, first intersection portions 5 are respectively extended from the intersection positions of the inner walls of the two liquid flow chambers 11, the two first intersection portions 5 are arranged at an angle to the corresponding inner walls of the liquid flow chamber 11, and the two first intersection portions 5 are connected to each other at one end away from the inner walls of the corresponding liquid flow chamber 11 to enclose and form the liquid flow chamber 11.

[0080] Based on the above-mentioned embodiments of the present application, by setting the first intersection 5 and setting the two first intersections 5 at an angle to the inner wall of the liquid flow chamber 11, the connection position of the two first intersections 5 can also form a bending structure similar to the first bending portion 4, so that when under pressure, the end and middle part of the liquid cooling plate will deform as a whole, rather than only the middle area deforming, thereby avoiding local collapse of the liquid cooling plate and damaging the liquid cooling plate.

[0081] Further, when the partition 2 in the present application includes the first partition 21 and the second partition 22, the connection position of the two first intersections 5 in the present application constitutes a structure similar to the first partition 21 and the second partition 22. In some embodiments of the present application, a partition 2 can be separately arranged near the intersection of the inner walls of the two liquid flow chambers 11 in the liquid flow chamber 11 to form a diamond structure with the two first intersections 5. Thereby, the structural strength of the entire liquid cooling plate from the end to the middle is more uniform and stable, and the deformation area is more uniform when the liquid cooling plate is under pressure.

[0082] Specifically, in the prior art, the end of the liquid cooling plate is usually directly set to a right-angle bend structure or an arc structure. In contrast, in the present application, the strength of the end and the middle of the liquid cooling plate tends to be equal through the setting of the first intersection 5, so that the liquid cooling plate can be deformed as a whole.

[0083] Further, in some embodiments of the present application, the angle between the first junction 5 and the corresponding inner wall of the liquid flow chamber 11 is α5, and 135°≤α5<180°.

[0084] Based on the above-mentioned embodiments of the present application, by limiting the angle between the first intersection 5 and the corresponding inner wall of the liquid flow cavity 11, the diamond structure formed at the position of the first intersection 5 at the end of the liquid cooling plate is more similar to the diamond structure formed by the two partitions 2 in the middle of the liquid cooling plate, thereby making the timing of deformation of the end and the middle part closer when the liquid cooling plate as a whole is under pressure, thereby avoiding damage to the liquid cooling plate caused by deformation of only the middle part when under pressure.

[0085] refer to Figure 1 As shown in, in some embodiments of the present application, the liquid cooling plate also includes two collecting parts 3, openings are set at both ends of the liquid flow cavity 11, and the two collecting parts 3 are respectively set at the openings at both ends of the liquid flow cavity 11. The two collecting parts 3 are respectively provided with a liquid inlet 31 and a liquid outlet 32, one end of the sub-channel 12 is connected to the liquid inlet 31 through a collecting part 3, and the other end of the sub-channel 12 is connected to the liquid outlet 32 ​​through another collecting part 3.

[0086] Based on the above-mentioned embodiments of the present application, by setting two collecting parts 3, on the one hand, the coolant can be evenly dispersed into each sub-channel 12 when the coolant is flowing in, and on the other hand, the coolant can be converged to the outlet 32 ​​when the coolant is flowing out, thereby making the flow in and out of the coolant more convenient and smooth, thereby improving the overall heat dissipation and cooling effect of the liquid cooling plate.

[0087] Specifically, in the present application, the current collecting member 3 can be set to any suitable structure.

[0088] In an exemplary embodiment provided in the present application, the current collecting member 3 can be set as a funnel-shaped structure. The expansion end of the funnel-shaped structure is connected to the opening end of the liquid flow chamber 11, and the position of the funnel-shaped structure near the contraction end is provided with a liquid inlet 31 or a liquid outlet 32. The setting of the funnel-shaped structure plays a role in converging.

[0089] Furthermore, in some embodiments of the present application, a guide plate or other structure may be provided inside the collector 3 of the funnel-shaped structure, and the guide plate is set in accordance with the number and position of the sub-channels 12. By setting the guide plate, the uniformity of the coolant distribution can be further improved. When the coolant flows to each sub-channel 12 through the liquid inlet 31, the guide plate guides and diverts the flow, so that the coolant in each sub-channel 12 is distributed more evenly, thereby making the overall temperature of the liquid cooling plate more uniform and improving the cooling effect. When the coolant flows to the liquid outlet 32, the coolant in each sub-channel 12 is concentrated to the position of the liquid outlet 32 ​​through the confluence of the guide plate and the funnel-shaped structure, thereby making the entire flow process of the coolant more stable and smooth.

[0090] On the basis of the above technical solution, according to the second aspect of the present application, reference Figure 8 and Fig. 9 As shown in the figure, the embodiment of the present application further provides a battery, which includes a frame (not shown in the figure), at least two battery modules 6 and at least one of the above-mentioned liquid cooling plates. At least two battery modules 6 are respectively arranged in the frame. The liquid cooling plate is arranged on the side of the battery module 6, and a liquid cooling plate is arranged between any two adjacent battery modules 6.

[0091] Based on the above-mentioned embodiments of the present application, the liquid cooling plate is arranged between the battery modules 6 to dissipate heat to the battery modules 6 on both sides at the same time, thereby improving the heat dissipation effect of the battery as a whole. At the same time, through the above-mentioned arrangement of the liquid cooling plate in the present application, the liquid cooling plate can adapt to the state of expansion of the battery module 6 during use, so that a good heat dissipation effect can be maintained during the use of the battery module 6, ensuring the safety of the battery during use and extending the service life of the battery.

[0092] Specifically, by setting the liquid cooling plate between the two battery cell modules 6, not only can the liquid cooling plate dissipate heat and cool the battery cell modules 6 on both sides at the same time, but the liquid cooling plate can also play a technical effect similar to the longitudinal beam in the battery pack in the prior art, thereby eliminating the need to set up the longitudinal beam, which not only reduces costs but also improves the overall integration of the battery.

[0093] In some embodiments, the battery includes three battery modules 6 and two liquid cooling plates, and the two liquid cooling plates are respectively located between any two adjacent battery modules 6. A liquid inlet connector 33 is connected to the liquid inlet 31, and the liquid inlet connectors 33 of any two adjacent liquid cooling plates are interconnected. A liquid outlet connector 34 is connected to the liquid outlet 32, and the liquid outlet connectors 34 of any two adjacent liquid cooling plates are interconnected.

[0094] Based on the above-mentioned embodiments of the present application, the liquid inlet ports 31 of the liquid cooling plate are connected in sequence by setting a liquid inlet joint 33, so that the overall liquid inlet pipeline setting of the liquid cooling plate is simpler. Similarly, by setting a liquid outlet joint 34 to connect each liquid outlet 32, the setting of the liquid outlet pipeline is simpler. The above-mentioned setting can reduce the space occupied by the liquid cooling plate pipeline inside the battery as a whole, thereby improving the energy density of the battery.

[0095] Specifically, in the present application, the specific structure and connection mode of the liquid inlet connector 33 and the liquid outlet connector 34 can be selected in any appropriate setting mode. For example, the liquid inlet connector 33 and the liquid outlet connector 34 are both set to metal materials, and the liquid inlet connector 33 is connected to the liquid inlet 31 through a thread, and the liquid outlet connector 34 is connected to the liquid outlet 32 ​​through a thread, so that the connection process is simpler and faster.

[0096] At the same time, after multiple liquid cooling plates are connected through the liquid inlet connector 33 and the liquid outlet connector 34, the cooling liquid circulation loop formed by each liquid cooling plate can also be provided with at least two water nozzle connectors for cooling liquid input and cooling liquid outflow respectively. The specific structure and connection method of the water nozzle connector can select any appropriate setting method, and there is no specific limitation on this.

[0097] Furthermore, in some embodiments of the present application, a liquid cooling plate is arranged between any two adjacent battery cell modules 6. At the same time, liquid cooling plates are arranged on both sides of any battery cell module 6. That is, a liquid cooling plate can also be separately arranged on the outer side of the battery cell module 6 located at the edge to enhance the heat dissipation effect of the edge battery cell module 6.

[0098] In addition, it should be noted that the battery in the present application is not limited to the above structure. For example, in some other embodiments of the present application, a bottom guard plate can be provided at the bottom of the battery, and the bottom guard plate can be directly connected to the frame or the liquid cooling plate to protect the battery module 6 and other components. For another example, a thermal conductive gel can be provided between the liquid cooling plate and the battery module 6. The provision of the thermal conductive gel can not only bond and fix the liquid cooling plate and the battery module 6, but also further enhance the heat conduction effect between the two, enhance the heat dissipation effect of the liquid cooling plate on the battery module 6, and extend the battery life.

[0099] Furthermore, the overall outline of the liquid cooling plate is not specifically limited in the present application, and can be specifically set according to the overall structure of the battery and the spatial arrangement of the battery cell module 6. For example, when the battery cell module 6 is usually set to a relatively square rectangular structure, the liquid cooling plate can be set to a rectangular shape accordingly. Alternatively, in some cases, the battery cell module 6 needs to be arranged in an L-shaped or other special-shaped structure, and the liquid cooling plate is also set to an L-shaped or other structure accordingly.

[0100] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0101] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0102] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A liquid cooling plate, characterized in that: The liquid cooling plate comprises: A plate body having a liquid flow cavity formed therein; at least one partition, wherein at least one of the partitions divides the liquid flow chamber into at least two sub-flow channels; Wherein, at least one first bending portion is provided on the separator, and when the plate body is under pressure, the separator can be deformed along the thickness direction of the plate body with the first bending portion as the center.

2. The liquid cooling plate according to claim 1, characterized in that: The liquid flow cavity extends along a first direction, and the first bending portion bends toward a second direction, and the second direction is perpendicular to the first direction.

3. The liquid cooling plate according to claim 1 or 2, characterized in that: The partition includes a first partition portion and a second partition portion, the first partition portion and the second partition portion are connected to each other, and the first bending portion is formed at a connection position.

4. The liquid cooling plate according to claim 3, characterized in that: At least two of the separators are provided, and two adjacent separators can form a rhombus structure.

5. The liquid cooling plate according to claim 3, characterized in that: The first partition and the second partition are arranged at an angle, and the first partition and the second partition are arranged at an angle to the inner wall of the liquid flow chamber respectively; An included angle α1 is formed between the first partition and the corresponding inner wall of the liquid flow chamber, 30°≤α1≤45°; An included angle α2 is formed between the second partition and the corresponding inner wall of the liquid flow chamber, and 30°≤α2≤45°.

6. The liquid cooling plate according to claim 4, characterized in that: A connecting rib is provided between two adjacent diamond structures, the connecting rib is connected to the adjacent first bending parts, and the connecting rib is configured as a retractable structure.

7. The liquid cooling plate according to claim 1 or 2, characterized in that: The partition comprises a third partition, a fourth partition and a fifth partition; The third partition, the fourth partition, and the fifth partition are connected in sequence, and the first bending portion is formed between the third partition and the fourth partition and between the fourth partition and the fifth partition, respectively.

8. The liquid cooling plate according to claim 1, characterized in that: The intersection positions of the two inner walls of the liquid flow chambers are respectively extended to form first intersection parts, and the two first intersection parts are respectively arranged at an angle to the corresponding inner walls of the liquid flow chambers, and the two first intersection parts are connected to each other at one end away from the corresponding inner walls of the liquid flow chambers to form a closed liquid flow chamber.

9. The liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate also includes two collecting pieces, openings are set at both ends of the liquid flow cavity, and the two collecting pieces are respectively set at the openings at both ends of the liquid flow cavity. A liquid inlet and a liquid outlet are respectively set on the two collecting pieces, one end of the sub-channel is connected to the liquid inlet through one of the collecting pieces, and the other end of the sub-channel is connected to the liquid outlet through another collecting piece.

10. A battery, characterized in that: The battery comprises: Frame; At least two battery cell modules, at least two of which are disposed in the frame respectively; and At least one liquid cooling plate according to any one of claims 1 to 9, wherein the liquid cooling plate is arranged on the side of the battery cell module, and the liquid cooling plate is arranged between any two adjacent battery cell modules.

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