Liquid cooling plate and battery

Abstract

The present application 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 partition member. A liquid flow cavity is formed inside the plate body. The at least one partition member divides the liquid flow cavity into at least two sub-flow channels. Each partition member is provided with at least one first bending portion, and when the plate body is subjected to pressure, the partition member can deform along the thickness direction of the plate body with the first bending portion as a center. The liquid cooling plate provided in the present application can solve the problem in the prior art that when a liquid cooling plate is applied to a side cooling solution, the liquid cooling plate will be pressed under the expansion action of battery cells, leading to collapse and blockage of a flow channel, which affects the flow area of the flow channel.

Description

A liquid cooling plate and battery This application claims priority to Chinese Patent Application No. 202411582056.2, filed with the State Intellectual Property Office of China on November 6, 2024, entitled “A Liquid Cooling Plate and Battery”, the entire contents of which are incorporated herein by reference. Technical Field

[0001] This application relates to the field of power battery technology, specifically to a liquid cooling plate and a battery. Background Technology

[0002] Liquid cooling plates are an important component of power batteries. Taking existing power batteries and liquid cooling plates as examples, liquid cooling plates are usually set as plate-shaped cavity structures. The cavity structure is equipped with partition structures to form flow channels for coolant to pass through.

[0003] However, when the aforementioned liquid cooling plate structure is applied to a side cooling solution, the liquid cooling plate is located on the side of the battery cell. During use, the battery cell will expand to a certain extent, and the force exerted by the expansion of the battery cell will directly act on the side liquid cooling plate. This will compress the liquid cooling plate and squeeze the flow channel, causing the flow channel to deform and resulting in local collapse and blockage of the flow channel, thereby affecting the flow capacity of the flow channel and the overall cooling effect of the liquid cooling plate. Summary of the Invention

[0004] The purpose of this 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 the side cooling scheme, the expansion of the battery cell will squeeze the liquid cooling plate, causing it to collapse and block the flow channel, thus affecting the flow area of ​​the flow channel.

[0005] To achieve the above objectives, according to a first aspect of this application, an embodiment of this 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. The at least one partition divides the liquid flow cavity into at least two sub-channels. The partition has at least one first bend, and when the plate body is compressed, the partition can deform along the thickness direction of the plate body around the first bend. Based on the above embodiment of this application, the liquid flow cavity inside the plate body is divided into multiple sub-channels by the partition. In this process, the partition not only serves as a separator but also supports the outer wall of the liquid flow cavity. The first bend allows the partition to deform along the thickness direction when compressed. This deformation of the partition allows the liquid cooling plate to adapt to the expansion and deformation of the battery module, ensuring mutual fit and preventing damage between them. Meanwhile, the first bend allows the separator to deform around the first bend when under pressure, flattening the liquid flow cavity and sub-channel as a whole. This prevents the liquid flow cavity or sub-channel from partially collapsing due to pressure, thus avoiding blockage of the sub-channel and preventing the cell expansion and deformation from affecting the flow efficiency of the liquid flow cavity, ensuring the heat dissipation effect of the liquid cooling plate.

[0006] In some embodiments, the fluid flow cavity extends along a first direction, and the first bend bends toward a second direction, which is perpendicular to the first direction.

[0007] Based on the above embodiments of this 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 bend to be perpendicular to the extension direction of the liquid flow cavity, the flow of the coolant is avoided when the first bend occurs.

[0008] In some embodiments, the separator includes a first partition and a second partition, the first partition and the second partition being connected to each other, and a first bend being formed at the connection position.

[0009] Based on the above embodiments of this application, the connection position between the first partition and the second partition forms a first bend. When the partition is compressed, the first partition and the second partition move closer to each other with the first bend as the center, thereby causing the partition to bend as a whole. At this time, the liquid cooling plate tends to flatten as a whole.

[0010] In some embodiments, at least two spacers are provided, and two adjacent spacers can form a rhomboid structure.

[0011] Based on the above embodiments of this application, through the above arrangement, a rhomboid structure is formed by two adjacent separators. The rhomboid structure has a certain supporting effect and can deform stably when subjected to pressure.

[0012] In some embodiments, the first partition and the second partition are arranged at an angle, and the first partition and the second partition are respectively arranged at an angle to the inner wall of the liquid flow cavity. The first partition and the corresponding inner wall of the liquid flow cavity have an included angle α1, where 30°≤α1≤45°. The second partition and the corresponding inner wall of the liquid flow cavity have an included angle α2, where 30°≤α2≤45°.

[0013] Based on the above embodiments of this application, the first partition and the second partition are angled to form a first bend at their connection point. By setting the first and second partitions at angles to the corresponding inner walls of the liquid flow chambers, and considering that the direction of the force exerted by the liquid cooling plate on the battery cell is generally perpendicular to the inner wall of the liquid flow chamber, this arrangement ensures that the force direction of the partition is at a certain angle to both the first and second partitions. This allows both the first and second partitions to deform towards the tilted side, making the deformation direction and degree of the partitions more controllable, thereby further reducing the impact on the flow capacity of the sub-channels. Furthermore, when the lengths of the first and second partitions are fixed, the angle between them and the inner wall of the liquid flow chamber directly affects the thickness of the liquid cooling plate. When the angle between the first and second partitions and the corresponding inner wall of the liquid flow chamber is too small, the rhomboid structure formed by the two adjacent partitions becomes too flat. This results in an excessively thin liquid cooling plate, affecting the flow area, and also reduces the subsequent deformable space of the partitions. When the angle between the first and second partitions and the inner wall of the corresponding liquid flow cavity is too large, the rhomboid structure will be too long, which will result in the liquid cooling plate being too thick, increasing the space occupied inside the battery and affecting the energy density of the battery.

[0014] In some embodiments, a connecting rib is provided between two adjacent rhomboid structures, the connecting rib is connected to the adjacent first bend, and the connecting rib is configured as a telescopic structure.

[0015] Based on the embodiments described above, the connecting ribs can further separate the sub-channels, resulting in a more uniform distribution of coolant within the liquid flow chamber. Furthermore, by making the connecting ribs a stretchable structure, such as using elastic rubber or a corrugated structure, the installation of the connecting ribs does not affect the compressive deformation of the liquid cooling plate.

[0016] In some embodiments, the separator 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 bend is formed between the third partition and the fourth partition, and between the fourth partition and the fifth partition.

[0017] Based on the above embodiments of this application, by the above arrangement, two bending structures can be formed on the same separator, and when the liquid cooling plate is subjected to overall pressure, the separator can be bent and deformed simultaneously with the two first bending parts as the center.

[0018] In some embodiments, a first junction portion is formed at the junction of the inner walls of the two liquid flow cavities. The two first junction portions are respectively set at an angle to the inner wall of the corresponding liquid flow cavity, and the ends of the two first junction portions away from the inner wall of the corresponding liquid flow cavity are connected to each other to close and form a liquid flow cavity.

[0019] Based on the above embodiments of this application, by setting the first junction and setting the two first junctions at an angle to the inner wall of the corresponding liquid flow cavity, the connection position of the two first junctions can also form a bending structure similar to the first bending part, so that when under pressure, the end and middle of the liquid cooling plate will deform as a whole, instead of only the middle area deforming, thereby avoiding local collapse and damage to the liquid cooling plate.

[0020] In some embodiments, the liquid cooling plate further includes two manifolds, with openings at both ends of the liquid flow cavity. The two manifolds are respectively disposed at the openings at both ends of the liquid flow cavity, and each manifold is provided with an inlet and an outlet. One end of the sub-channel is connected to the inlet through one manifold, and the other end of the sub-channel is connected to the outlet through the other manifold.

[0021] Based on the above embodiments of this application, by setting two manifolds, on the one hand, the coolant can be evenly distributed into each sub-channel when it enters the liquid flow, and on the other hand, the coolant can flow to the outlet when it exits the liquid flow, thereby making the liquid entry and exit process more convenient and smooth, and improving the overall heat dissipation and cooling effect of the liquid cooling plate.

[0022] According to a second aspect of this application, a battery is provided, comprising a frame, at least two cell modules, and at least one liquid cooling plate as described above. The at least two cell modules are respectively disposed within the frame. The liquid cooling plate is attached to the side of the cell module, and a liquid cooling plate is disposed between any two adjacent cell modules.

[0023] Based on the embodiments described above, by placing a liquid cooling plate between the cell modules to simultaneously dissipate heat from both sides of the cell modules, the overall heat dissipation effect of the battery is improved. Furthermore, the liquid cooling plate configuration in this application allows it to adapt to the expansion of the cell modules during use, thereby maintaining good heat dissipation, ensuring battery safety, and extending battery life.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 is a schematic diagram of the structure of the liquid cooling plate provided in an embodiment of this application.

[0027] Figure 2 is a schematic diagram of the internal structure of a liquid cooling plate provided in one embodiment of this application.

[0028] Figure 3 is an enlarged schematic diagram of part A in Figure 2.

[0029] Figure 4 is an enlarged schematic diagram of part B in Figure 2.

[0030] Figure 5 is a schematic diagram of the internal structure of a liquid cooling plate provided in another embodiment of this application.

[0031] Figure 6 is an enlarged schematic diagram of part C in Figure 5.

[0032] Figure 7 is a schematic diagram of the internal structure of the liquid cooling plate provided in the third embodiment of this application.

[0033] Figure 8 is a schematic diagram of the battery structure provided in an embodiment of this application.

[0034] Figure 9 is a partial exploded view of the battery provided in an embodiment of this application. (Explanation of reference numerals)

[0035] Plate body; 11. Liquid flow chamber; 12. Sub-flow channel; 2. Separator; 21. First separation section; 22. Second separation section; 23. Third separation section; 24. Fourth separation section; 25. Fifth separation section; 3. Collector; 31. Liquid inlet; 32. Liquid outlet; 33. Liquid inlet connector; 34. Liquid outlet connector; 4. First bend; 5. First junction; 6. Battery cell module; 7. Connecting rib. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this application, it should be noted that, unless otherwise stated, the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Liquid cooling plates are an important component of power batteries. Taking existing power batteries and liquid cooling plates as examples, liquid cooling plates are usually set as plate-shaped cavity structures. The cavity structure is equipped with partition structures to form flow channels for coolant to pass through.

[0043] However, when the aforementioned liquid cooling plate structure is applied to a side-cooling scheme, the liquid cooling plate is located on the side of the battery cell. During use, the battery cell will expand to a certain extent, and the force exerted by the expansion will directly act on the side-cooling plate. This will compress the liquid cooling plate and squeeze the flow channel. The flow channel will deform under compression, which may cause partial collapse of the flow channel. For example, the collapse and depression in the middle of the flow channel may lead to blockage, thereby affecting the normal flow of coolant and the cooling effect of the liquid cooling plate.

[0044] To address the aforementioned problems in the prior art, according to a first aspect of this application, an embodiment of this application provides a liquid cooling plate. Referring to Figures 1 and 2, 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. The at least one partition 2 divides the liquid flow cavity 11 into at least two sub-channels 12. The partition 2 is provided with at least one first bending portion 4, and the partition 2 is deformable along the thickness direction of the plate body 1 when the plate body 1 is compressed.

[0045] Based on the above embodiments of this application, the liquid flow cavity 11 within the plate 1 is divided into multiple sub-channels 12 by the partition 2. In this process, the partition 2 not only serves as a separator but also supports the outer wall of the liquid flow cavity 11. Furthermore, the partition 2 is designed to deform along its thickness direction under pressure. This deformation of the partition 2 allows the liquid cooling plate to adapt to the expansion and deformation of the battery cell module 6, ensuring mutual fit and preventing damage between them.

[0046] Meanwhile, by setting the first bending part 4, the separator 2 can deform around the first bending part 4 when it is under pressure, making the sub-flow channel 12 flattened. However, the flow area of ​​the sub-flow channel 12 will not be greatly affected at this time, thereby ensuring the flow efficiency and the heat dissipation effect of the liquid cooling plate.

[0047] Furthermore, in some embodiments of this application, when the separator 2 is set, it is necessary to divide the liquid flow cavity 11 into multiple sub-flow channels 12 by setting the separator 2. Therefore, when the separator 2 is set, the extension direction of the separator 2 needs to be set along the flow direction of the coolant in the liquid flow cavity 11, which is generally the length direction of the plate 1.

[0048] Referring to Figures 1 and 2, in some embodiments of this application, the fluid flow cavity 11 may extend along a first direction, the first bend 4 bends toward a second direction, and the second direction is perpendicular to the first direction.

[0049] Based on the above embodiments of this 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 flow direction of the coolant is avoided when the first bending portion 4 bends.

[0050] Furthermore, the bending of the first bending portion 4 toward the second direction can specifically include two cases: one is that the bending direction of all the first bending portions 4 is the same, and the other is that the bending direction of some of the first bending portions 4 is opposite to the bending direction of other first bending portions 4.

[0051] Furthermore, when the bending direction of some of the first bends 4 is opposite to that of other first bends 4, it can be further divided into two cases. When there are multiple partitions 2, in one case, each partition 2 has one first bend 4, and the bending direction of some of the first bends 4 being opposite to the others could mean that the first bends 4 on different partitions 2 have different orientations. In another case, each partition 2 can have multiple first bends 4, such as two, three, four, or more. In this case, the bending direction of some of the first bends 4 being opposite to the others could mean that the first bends 4 on different partitions 2 have different orientations, or it could mean that multiple first bends 4 on the same partition 2 have different orientations.

[0052] Furthermore, the first direction mentioned above in this application can correspond to the length direction of the liquid cooling plate, that is, the coolant flows along the length direction within the liquid cooling plate. The second direction can correspond to the width direction of the liquid cooling plate, that is, when the liquid cooling plate is compressed, the first bending portion 4 deforms in the width direction of the liquid cooling plate, causing the liquid cooling plate to elongate to a certain extent in the width direction. It also corresponds to the aforementioned deformation of the liquid cooling plate in the thickness direction, that is, the liquid cooling plate flattens under pressure in the thickness direction.

[0053] In this application, the specific structure of the separator 2 can be selected in any suitable manner.

[0054] Based on the above disclosure of this application, and referring to FIG2 and FIG3, in an exemplary embodiment provided in this 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 bend 4 is formed at the connection position.

[0055] Based on the above embodiments of this 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 compressed, the first partition 21 and the second partition 22 move closer to each other with the first bending portion 4 as the center, thereby causing the partition 2 to bend as a whole. At this time, the liquid cooling plate tends to flatten as a whole.

[0056] Furthermore, in some embodiments of this application, at least two separators 2 are provided, and two adjacent separators 2 can form a rhomboid structure.

[0057] Based on the above embodiments of this application, through the above arrangement, a rhomboid structure is formed by two adjacent separators 2. The rhomboid structure has a certain supporting effect and can deform stably when subjected to pressure.

[0058] Specifically, the above embodiment corresponds to the implementation where only one first bend 4 is provided on a single partition 2. In this case, when at least two partitions 2 are provided, the orientation of the bends on the partitions 2 can be set to different orientations. Furthermore, by setting the first bends 4 on two adjacent partitions 2 to opposite orientations, the two adjacent partitions 2 are specifically configured as a rhomboid structure.

[0059] Furthermore, the rhomboid structure mentioned above in this application refers to a structure in which the ends of two adjacent partition members 2 are respectively connected to the inner wall of the liquid flow cavity 11, and the area between them forms a rhomboid structure. In a specific configuration, the two partition members 2 are respectively connected to the inner walls of the liquid flow cavities 11 on both sides, and the ends of the two partition members 2 are connected to each other, thereby forming a rhomboid structure.

[0060] Alternatively, in some other embodiments of this application, referring to Figure 3, in a specific setting, the connection position between the two separators 2 and the inner wall of the liquid flow cavity 11 on the same side can be set at a certain distance. At this time, the two separators 2, together with the inner walls of the two liquid flow cavities 11 on both sides, actually form a hexagonal structure. However, since the characteristic that the rhombus structure can be stably stretched is still utilized at this time, it can also be regarded as a deformation of the rhombus structure.

[0061] Furthermore, it should be noted that the ability of two adjacent separators 2 to form a rhombus structure as described above does not mean that any two adjacent separators 2 can form a rhombus structure. Rather, it means that when multiple separators 2 are provided, they are arranged in a certain order, with each pair of separators 2 forming a rhombus structure. Specifically, please refer to Figure 3. In this case, the first and second separators 2 from left to right cooperate to form a rhombus structure, followed by the third and fourth separators 2, while the second and third separators 2 form a concave hexagonal structure.

[0062] Referring to Figures 2 to 4, in some embodiments of this 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 respectively arranged at an angle to the inner wall of the liquid flow cavity 11.

[0063] Based on the above embodiments of this application, the first partition 21 and the second partition 22 are set at an angle to form a first bend 4 at their connection point. By setting the first partition 21 and the second partition 22 at an angle to the inner wall of the corresponding liquid flow cavity 11, and since the direction of the force exerted by the liquid cooling plate on the battery cell is generally perpendicular to the inner wall of the liquid flow cavity 11, the above arrangement ensures that the force direction of the partition 2 is at a certain angle to both the first partition 21 and the second partition 22. This allows the first partition 21 and the second partition 22 to deform towards the tilted side when they deform, making the deformation direction and degree of the partition 2 more controllable, thereby further reducing the impact on the flow capacity of the sub-channel 12.

[0064] In some embodiments, the first partition 21 and the inner wall of the corresponding liquid flow cavity 11 have an included angle α1, where 30°≤α1≤45°. The second partition 22 and the inner wall of the corresponding liquid flow cavity 11 have an included angle α2, where 30°≤α2≤45°.

[0065] Based on the embodiments described above, when the lengths of the first partition 21 and the second partition 22 are determined, the angle between them and the inner wall of the corresponding liquid flow cavity 11 directly affects 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 cavity 11 is too small, the rhomboid structure formed by the two adjacent partitions 2 is too flat. This results in the liquid cooling plate being too thin, affecting the flow area, and also reduces the subsequent deformable space of the partition 2. Conversely, when the angle between the first partition 21 and the second partition 22 and the inner wall of the liquid flow cavity 11 is too large, the rhomboid structure becomes too long, leading to an excessively thick liquid cooling plate, increasing the space occupied inside the battery, and affecting the battery's energy density.

[0066] Furthermore, the angles between the first partition 21 and the second partition 22 and the inner wall of the corresponding liquid flow cavity 11 will also affect the deformation resistance of the partition 2 under pressure. For example, if the angles between the first partition 21 and the second partition 22 and the inner wall of the corresponding liquid flow cavity 11 are set too small, the rhomboid structure formed by the two adjacent partitions 2 will be too flat. In this case, the liquid cooling plate will deform under pressure 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 usage requirements.

[0067] In summary, the specific values ​​of the angle α1 between the first partition 21 and the inner wall of the liquid flow cavity 11 and the angle α2 between the second partition 22 and the inner wall of the liquid flow cavity 11 can be set according to the specific structure of the liquid cooling plate and the strength requirements, etc., and this application does not impose specific restrictions on them.

[0068] Referring to Figures 5 and 6, in another exemplary embodiment provided in this application, the separator 2 may include a third separator 23, a fourth separator 24, and a fifth separator 25. The third separator 23, the fourth separator 24, and the fifth separator 25 are connected in sequence, and a first bend 4 is formed between the third separator 23 and the fourth separator 24, and between the fourth separator 24 and the fifth separator 25, respectively.

[0069] Based on the above embodiments of this application, by means of the above arrangement, two first bending portions 4 can be formed on the same separator 2. When the liquid cooling plate is subjected to pressure as a whole, the separator 2 can be bent and deformed simultaneously with the two first bending portions 4 as the center.

[0070] Specifically, based on the above configuration, the separator 2, composed of the third separator 23, the fourth separator 24, and the fifth separator 25, is configured as an S-shaped structure. During configuration, the third separator 23 and the fifth separator 25 are respectively connected to the inner wall of the fluid flow chamber 11, and the positions where the third separator 23 and the fifth separator 25 are connected to the fourth separator 24 can be rounded to further enhance the connection strength.

[0071] Furthermore, referring to FIG6, in some embodiments of this application, the included angle between the third partition 23 and the inner wall of the corresponding liquid flow cavity 11 is α3, 30°≤α3≤45°, and the included angle between the fifth partition 25 and the inner wall of the corresponding liquid flow cavity 11 is α4, 30°≤α4≤45°.

[0072] Based on the above embodiments of this application, by limiting the included angles between the third partition 23 and the fifth partition 25 and the inner wall of the corresponding liquid flow cavity 11, the thickness of the liquid cooling plate can be set within a suitable range, and the deformation resistance of the partition 2 can be within a suitable range.

[0073] Meanwhile, the angles between the third partition 23 and the fifth partition 25 and the inner wall of the corresponding 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 degree of the third partition 23 and the fifth partition 25 is relatively close. That is, when the liquid cooling plate and the partition 2 are deformed, they deform evenly from both sides to the middle in the thickness direction, making the deformation process more stable and controllable, and avoiding damage to the liquid cooling plate.

[0074] Furthermore, in some embodiments of this application, reinforcing protrusions may be provided at the junction of the third partition 23 and the fourth partition 24 and at the junction of the fourth partition 24 and the fifth partition 25, so that the partition 2 is set as an S-shaped structure to maintain a certain strength.

[0075] Referring to Figure 7, in the third embodiment provided in this application, the separator 2 includes a first separator 21 and a second separator 22. Two adjacent separators 2 form a rhomboid structure, and a connecting rib 7 is provided between two adjacent rhomboid structures. The connecting rib 7 can be connected to the location of the adjacent first bend 4. The connecting rib 7 is set as a telescopic structure.

[0076] Based on the above embodiments of this application, the connecting ribs 7 can further divide the sub-channels 12, making the distribution of coolant in the liquid flow chamber 11 more uniform. Furthermore, by setting the connecting ribs 7 as a stretchable structure, such as using elastic rubber or a wave-like structure, the installation of the connecting ribs 7 does not affect the compressive deformation of the liquid cooling plate.

[0077] Referring to Figure 4, in some embodiments of this application, the two liquid flow cavities 11 have first junction portions 5 extending from their respective inner wall junction positions. The two first junction portions 5 are angled to the corresponding inner wall of the liquid flow cavity 11, and the ends of the two first junction portions 5 away from the corresponding inner wall of the liquid flow cavity 11 are connected to each other to close and form the liquid flow cavity 11.

[0078] Based on the above embodiments of this application, by setting the first junction 5 and setting the two first junctions 5 at an angle to the inner wall of the liquid flow cavity 11, the connection position of the two first junctions 5 can also form a bending structure similar to the first bending part 4, so that when under pressure, the end and middle of the liquid cooling plate will deform as a whole, instead of only the middle area deforming, thereby avoiding local collapse and damage to the liquid cooling plate.

[0079] Furthermore, when the separator 2 in this application includes a first separator 21 and a second separator 22, the connection position of the two first junctions 5 in this application forms a structure similar to that of the first separator 21 and the second separator 22. In some embodiments of this application, a separate separator 2 can be provided near the junction of the inner walls of the two liquid flow cavities 11 to form a rhomboid structure with the two first junctions 5. This makes the overall structural strength of the liquid cooling plate more uniform and stable from the end to the middle, and the deformation area is more uniform when the liquid cooling plate is under pressure.

[0080] Specifically, in the prior art, the ends of liquid cooling plates are usually directly set as right-angle bends or arcs. In contrast, in this application, the first junction 5 makes the strength of the ends and the middle of the liquid cooling plate tend to be equal, so that the liquid cooling plate can deform as a whole.

[0081] Furthermore, in some embodiments of this application, the included angle between the first junction 5 and the inner wall of the corresponding fluid flow cavity 11 is α5, where 135°≤α5<180°.

[0082] Based on the above embodiments of this application, by limiting the included angle between the first junction 5 and the inner wall of the corresponding liquid flow cavity 11, the rhomboid structure formed at the position of the first junction 5 at the end of the liquid cooling plate is more similar to the rhomboid structure formed by the two separators 2 in the middle of the liquid cooling plate. This makes the timing of deformation at the end and the middle of the liquid cooling plate when the whole liquid cooling plate is under pressure closer, thus avoiding damage to the liquid cooling plate caused by deformation of only the middle when under pressure.

[0083] Referring to Figure 1, in some embodiments of this application, the liquid cooling plate further includes two manifolds 3. The liquid flow cavity 11 has openings at both ends, and the two manifolds 3 are respectively disposed at the openings at both ends of the liquid flow cavity 11. The two manifolds 3 are respectively provided with an inlet 31 and an outlet 32. One end of the sub-channel 12 is connected to the inlet 31 through one manifold 3, and the other end of the sub-channel 12 is connected to the outlet 32 ​​through another manifold 3.

[0084] Based on the above embodiments of this application, by setting two manifolds 3, on the one hand, the coolant can be evenly distributed into each sub-channel 12 when it enters the liquid, and on the other hand, the coolant can flow to the outlet 32 ​​when it exits the liquid, thereby making the liquid entry and exit process more convenient and smooth, and improving the overall heat dissipation and cooling effect of the liquid cooling plate.

[0085] Specifically, in this application, the current collector 3 can be configured with any suitable structure.

[0086] In one exemplary embodiment provided in this application, the flow collector 3 can be configured as a funnel-shaped structure. The expanding end of the funnel-shaped structure is connected to the opening end of the liquid flow chamber 11, and an inlet 31 or an outlet 32 ​​is provided near the contracting end of the funnel-shaped structure. The funnel-shaped structure serves to converge the flow.

[0087] Furthermore, in some embodiments of this application, the funnel-shaped collector 3 may also be equipped with a guide plate or similar structure. The guide plate is configured in accordance with the number and position of the sub-channels 12. The guide plate further enhances the uniformity of coolant distribution. When the coolant flows from the inlet 31 to each sub-channel 12, the guide plate guides and divides the flow, resulting in a more uniform coolant distribution within each sub-channel 12, thus ensuring a more uniform overall temperature of the liquid-cooled plate and improving the cooling effect. When the coolant flows to the outlet 32, the coolant in each sub-channel 12 is concentrated at the outlet 32 ​​by the guide plate and the converging effect of the funnel-shaped structure, making the entire flow process of the coolant more stable and smooth.

[0088] Based on the above technical solutions, and according to a second aspect of this application, referring to Figures 8 and 9, an embodiment of this application also provides a battery, which includes a frame (not shown in the figures), at least two cell modules 6, and at least one of the aforementioned liquid cooling plates. At least two cell modules 6 are respectively disposed within the frame. Liquid cooling plates are attached to the sides of the cell modules 6, and liquid cooling plates are disposed between any two adjacent cell modules 6.

[0089] Based on the embodiments described above, by placing a liquid cooling plate between the cell modules 6 to simultaneously dissipate heat from both sides of the cell modules 6, the overall heat dissipation effect of the battery is improved. Furthermore, the liquid cooling plate configuration in this application allows it to adapt to the expansion of the cell modules 6 during use, thereby maintaining good heat dissipation, ensuring battery safety, and extending battery life.

[0090] Specifically, by placing the liquid cooling plate between the two cell modules 6, the liquid cooling plate can not only dissipate heat and cool the cell modules 6 on both sides at the same time, but also achieve a similar technical effect to the longitudinal beams in the battery pack in the prior art. This eliminates the need to set up longitudinal beams, which can not only reduce costs, but also improve the overall integration of the battery.

[0091] In some embodiments, the battery includes three cell modules 6 and two liquid cooling plates, with the two liquid cooling plates located between any two adjacent cell 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.

[0092] Based on the embodiments described above, by providing the liquid inlet connector 33 to sequentially connect the liquid inlets 31 of the liquid cooling plate, the overall liquid inlet pipeline configuration of the liquid cooling plate is simplified. Similarly, by providing the liquid outlet connector 34 to connect each liquid outlet 32, the liquid outlet pipeline configuration is simplified. This configuration reduces the space occupied by the liquid cooling plate pipeline within the battery, thereby increasing the battery's energy density.

[0093] Specifically, in this application, the specific structure and connection method of the liquid inlet connector 33 and the liquid outlet connector 34 can be selected by any suitable configuration. For example, both the liquid inlet connector 33 and the liquid outlet connector 34 are made of metal, and the liquid inlet connector 33 is connected to the liquid inlet 31 by a thread, and the liquid outlet connector 34 is connected to the liquid outlet 32 ​​by a thread, thereby making the connection process simpler and faster.

[0094] Meanwhile, after multiple liquid cooling plates are connected through inlet connector 33 and outlet connector 34, the coolant circulation loop formed by the cooperation of each liquid cooling plate can also be equipped with at least two water nozzle connectors for coolant input and coolant outflow, respectively. The specific structure and connection method of the water nozzle connectors can be selected in any suitable way, and there are no specific restrictions on them.

[0095] Furthermore, in some embodiments of this application, a liquid cooling plate is provided between any two adjacent battery cell modules 6. At the same time, liquid cooling plates are provided on both sides of any battery cell module 6. That is, a liquid cooling plate can also be provided separately on the outer side of the battery cell module 6 located at the edge, so as to improve the heat dissipation effect of the edge battery cell module 6.

[0096] Furthermore, it should be noted that the battery in this application is not limited to the above structure. For example, in some other embodiments of this application, a bottom protective plate can also be provided at the bottom of the battery. The bottom protective plate can be directly connected to the frame or liquid cooling plate to protect components such as the cell module 6. As another example, thermally conductive gel can also be provided between the liquid cooling plate and the cell module 6. The provision of thermally conductive gel not only bonds and fixes the liquid cooling plate and the cell module 6, but also further improves the thermal conductivity between them, enhancing the heat dissipation effect of the liquid cooling plate on the cell module 6 and extending battery life.

[0097] Furthermore, this application does not impose specific limitations on the overall outline of the liquid cooling plate; it can be set according to the overall structure of the battery and the spatial arrangement of the cell module 6. For example, when the cell module 6 is typically set as a relatively square rectangular structure, the liquid cooling plate can be set as a rectangle accordingly. Alternatively, in some cases, the cell module 6 needs to be arranged in an L-shaped or other irregular structure, in which case the liquid cooling plate is also set as an L-shaped or other similar structure.

[0098] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0100] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate includes: The plate has a liquid flow cavity formed inside; At least one partition, wherein the at least one partition divides the fluid flow chamber into at least two sub-channels; The partition is provided with at least one first bending portion, and when the plate is compressed, the partition can deform along the thickness direction of the plate with the first bending portion as the center.

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

3. The liquid-cooled plate according to claim 1 or 2, characterized in that, The separator includes a first separator and a second separator, the first separator and the second separator are connected to each other, and the first bend is formed at the connection position.

4. The liquid cooling plate according to claim 3, characterized in that, The separator is provided in at least two parts, and two adjacent separators can form a rhomboid structure.

5. The liquid cooling plate according to claim 3, characterized in that, The first partition and the second partition are set at an angle, and the first partition and the second partition are respectively set at an angle to the inner wall of the liquid flow cavity; The first partition and the corresponding inner wall of the fluid flow cavity have an included angle α1, where 30°≤α1≤45°; The second partition and the corresponding inner wall of the fluid flow cavity have an included angle α2, where 30°≤α2≤45°.

6. The liquid cooling plate according to claim 4, characterized in that, A connecting rib is provided between two adjacent rhomboid structures, the connecting rib is connected to the adjacent first bend, and the connecting rib is configured as a telescopic structure.

7. The liquid-cooled plate according to claim 1 or 2, characterized in that, The separator includes a third separator, a fourth separator, and a fifth separator; 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.

8. The liquid cooling plate according to claim 1, characterized in that, The two inner walls of the liquid flow chambers extend to form a first junction portion at their respective junction positions. The two first junction portions are respectively set at an angle to the inner wall of the corresponding liquid flow chamber, and the ends of the two first junction portions away from the inner wall of the corresponding liquid flow chamber are connected to each other to close and form the liquid flow chamber.

9. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate also includes two manifolds. The liquid flow cavity has openings at both ends. The two manifolds are respectively located at the openings at both ends of the liquid flow cavity. The two manifolds are respectively provided with an inlet and an outlet. One end of the sub-channel is connected to the inlet through one of the manifolds, and the other end of the sub-channel is connected to the outlet through the other manifold.

10. A battery, characterized in that, The battery includes: Frame; At least two battery cell modules are respectively disposed within the frame; and at least one liquid cooling plate as described in any one of claims 1-9 is attached to the side of the battery cell module and is disposed between any two adjacent battery cell modules.

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