Liquid cooling plate, battery and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a liquid cooling plate, a battery and a vehicle, and the liquid cooling plate comprises a liquid cooling plate body, a plurality of rib plates and a plurality of supporting blocks. And a cavity is formed in the liquid cooling plate body. The plurality of rib plates are arranged in the cavity, the first end of each rib plate is connected with the first inner side wall, the second end of each rib plate is connected with the second inner side wall, and the plurality of rib plates are sequentially arranged in the cavity, so that the cavity is divided into a plurality of liquid cooling channels. The multiple supporting blocks are connected to at least one of the first inner side wall, the second inner side wall and the rib plate. When the liquid cooling plate is extruded by the battery cell and deforms and the thickness is reduced, the plurality of supporting blocks bear the expansion force of the battery cell, and the first inner side wall and the second inner side wall are opened under the supporting action of the supporting blocks, so that a certain space is reserved in the liquid cooling channel to allow the cooling liquid to pass through. And the situation that the first inner side wall and the second inner side wall of the liquid cooling plate body are attached, so that the liquid cooling channel is closed, the cooling liquid cannot flow, and the battery cell is cooled is avoided.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry, battery charging performance continues to improve, and the requirements for heat dissipation design of battery cells are becoming increasingly stringent. Batteries consist of multiple cells. To dissipate heat, a liquid cooling plate is often installed between adjacent cells (large surfaces). The cavity is provided with multiple inclined rib features. These rib features divide the cavity within the liquid cooling plate into multiple coolant flow channels for the coolant. The multiple rib features enhance the overall mechanical strength of the liquid cooling plate.

[0003] During operation, the cell's thickness gradually expands due to internal chemical reactions, gas production, electrolyte interface membrane growth, and ion deintercalation. This causes the liquid cooling plate between the cells (larger surfaces) to be squeezed and deformed by the cells. At this point, the angle between the rib features and the inner wall of the liquid cooling plate gradually decreases, reducing the thickness of the liquid cooling plate to accommodate the increased cell thickness.

[0004] However, when the expansion of the battery cell reaches a certain extent, the two side walls of the liquid cooling plate are squeezed too close together until they fit together, causing the coolant flow channel to be over-compressed and closed, resulting in the coolant being unable to flow and the battery cell being unable to dissipate heat. Utility Model Content

[0005] In view of this, the present application provides a liquid cooling plate, a battery and a vehicle to solve the problem that when the existing liquid cooling plate is over-squeezed by the battery cells with increased thickness, the internal coolant flow channel is over-compressed and closed, resulting in the coolant being unable to flow and the battery cells being unable to dissipate heat and cool the battery cells.

[0006] In a first aspect, the present application provides a liquid cooling plate, comprising:

[0007] The liquid cooling plate body has a cavity provided therein;

[0008] a plurality of ribs, sequentially arranged in the cavity, wherein a first end of the rib is connected to a first inner sidewall of the cavity, and a second end of the rib is connected to a second inner sidewall of the cavity, and the plurality of ribs divide the cavity into a plurality of liquid cooling channels for circulating coolant;

[0009] A plurality of support blocks are connected to at least one of the first inner side wall, the second inner side wall and the rib plate.

[0010] Optionally, the support blocks are connected to both the first inner side wall and the second inner side wall, the first end of the rib plate is connected to the support block on the first inner side wall, and the second end of the rib plate is connected to the support block on the second inner side wall.

[0011] Optionally, the length of the rib is half of the distance between two adjacent support blocks.

[0012] Optionally, the projected length of the rib on the first inner side wall is half of the distance between two adjacent support blocks.

[0013] Optionally, the height of the support block is greater than the thickness of the rib plate, wherein,

[0014] The height of the support block is 0.5 mm to 4 mm;

[0015] And / or, the thickness of the rib is 0.25 mm to 1.2 mm.

[0016] Optionally, the width of the support block is 1.2 mm to 10 mm;

[0017] And / or, the distance between the support blocks on the first inner sidewall and the second inner sidewall is 1 mm to 6 mm.

[0018] Optionally, the number of the support blocks on the first inner sidewall and the second inner sidewall is 6 to 32;

[0019] And / or, a distance between two adjacent support blocks on the first inner side wall or the second inner side wall is 5 mm to 16 mm.

[0020] Optionally, the plurality of ribs are arranged obliquely in the cavity, and the inclination angle of the ribs relative to the first inner side wall or the second inner side wall is 15 degrees to 85 degrees.

[0021] In a second aspect, the present application also provides a battery comprising any of the above-mentioned liquid cooling plates.

[0022] In a third aspect, the present application also provides a vehicle comprising any of the above-mentioned batteries.

[0023] The present application provides a liquid cooling plate, comprising: a liquid cooling plate body, a plurality of ribs and a plurality of support blocks. A cavity is provided inside the liquid cooling plate body. The plurality of ribs are arranged in the cavity, the first end of each rib is connected to the first inner side wall, and the second end is connected to the second inner side wall. The plurality of ribs are arranged in sequence in the cavity, so that the plurality of ribs divide the cavity into a plurality of liquid cooling channels. The plurality of support blocks are respectively arranged in each liquid cooling channel, and the support blocks are long and arranged along the flow direction of the liquid cooling channel. When the liquid cooling plate is used, the liquid cooling plate is arranged between two battery cells. When the battery cell is working, due to the gas production caused by the internal chemical reaction, the growth of the electrolyte interface film and the ion deintercalation, the size of the battery cell along the thickness direction will gradually expand and increase, and the liquid cooling plate will be squeezed by the battery cell and deformed, and the thickness will decrease. As the battery cells continue to expand, the angle between the ribs and the first and second inner walls gradually decreases until the support blocks abut against the first or second inner wall. From then on, the expansion force of the battery cells is borne by the multiple support blocks, and the thickness of the liquid cooling plate no longer decreases. Under the support of the support blocks, the first and second inner walls are stretched open, ensuring that the volume of the liquid cooling channel formed between the support blocks and the ribs no longer continues to decrease, ensuring that there is a certain amount of space in the liquid cooling channel for the coolant to pass through. This prevents the first and second inner walls of the liquid cooling plate body from being excessively squeezed together and fitting together, thus closing the liquid cooling channel and preventing the coolant from flowing and cooling the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of a liquid cooling plate according to an embodiment of the present application before being compressed by a battery cell;

[0027] Figure 3 This is a schematic diagram of a liquid cooling plate according to an embodiment of the present application after being compressed by a battery cell;

[0028] Figure 4 This is a schematic diagram of the positional relationship between a liquid cooling plate and a battery cell according to an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Liquid cooling plate body; 2. Ribs; 3. Support blocks; 4. First inner wall; 5. Second inner wall; 6. Battery cells; 7. Liquid cooling channel. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0032] The following combination Figures 1 to 4 , describing the embodiments of the present application.

[0033] According to an embodiment of the present application, on the one hand, Figure 1 As shown, a liquid cooling plate is provided, comprising: a liquid cooling plate body 1, a plurality of ribs 2 and a plurality of support blocks 3. A cavity is provided inside the liquid cooling plate body 1, and the inner walls on both sides of the cavity are respectively a first inner wall 4 and a second inner wall 5. A plurality of ribs 2 are arranged in the cavity, and the first end of each rib 2 is connected to the first inner wall 4 and the second end is connected to the second inner wall 5. The plurality of ribs 2 are arranged in sequence in the cavity, so that the plurality of ribs 2 divide the cavity into a plurality of liquid cooling channels 7. Each liquid cooling channel 7 is surrounded by the first inner wall 4, the second inner wall 5 and the ribs 2. The first inner wall 4 and the second inner wall 5 are parallel. The ribs 2 are parallel to each other and are all inclined relative to the first inner wall 4 or the second inner wall 5.

[0034] A plurality of support blocks 3 are respectively arranged in each liquid cooling channel 7 , and the support blocks 3 are long and arranged along the flow direction of the liquid cooling channel 7 . The support blocks 3 can be arranged on the first inner side wall 4 .

[0035] like Figures 2 to 4As shown, when the liquid cooling plate is used, it is arranged between two battery cells 6. When the battery cells 6 are working, the size of the battery cells 6 along the thickness direction will gradually expand and increase due to the gas production caused by the internal chemical reaction, the growth of the electrolyte interface membrane and the ion deintercalation. The liquid cooling plate will be squeezed by the battery cells 6 and deformed, and its thickness will decrease. As the battery cells 6 continue to expand, the angle between the ribs 2 and the first inner side wall 4 and the second inner side wall 5 gradually decreases until the multiple support blocks 3 on the first inner side wall 4 abut against the second inner side wall 5. From then on, the expansion force of the battery cells 6 is borne by the multiple support blocks 3, and the thickness of the liquid cooling plate no longer decreases. Under the support of the support blocks 3, the first inner side wall 4 and the second inner side wall 5 are stretched open, ensuring that the volume of the liquid cooling channel 7 formed between the support blocks 3 and the ribs 2 no longer continues to decrease, ensuring that there is a certain space in the liquid cooling channel 7 for the coolant to pass through. The first inner side wall and the second inner side wall of the liquid cooling plate body are prevented from being excessively squeezed and fitted together, thereby closing the liquid cooling channel and preventing the coolant from flowing and cooling the battery cell 6 .

[0036] The support blocks 3 can also be arranged on the second inner wall 5. As the battery cell 6 continues to expand, the angles between the ribs 2 and the first inner wall 4 and the second inner wall 5 gradually decrease until the multiple support blocks 3 on the second inner wall 5 are against the first inner wall 4.

[0037] The support block 3 can also be set on the side wall of the rib plate 2. As the battery cell 6 continues to expand, the angle between the rib plate 2 and the first inner wall 4 and the second inner wall 5 gradually decreases until the support block 3 on the side wall of the rib plate 2 rests on the first inner wall 4 or the second inner wall 5.

[0038] It is worth noting that, with regard to the setting of the support block 3, the support block 3 can be set on any one of the first inner side wall 4, the second inner side wall 5 and the rib plate 2, or on any two of the first inner side wall 4, the second inner side wall 5 and the rib plate 2, or on all three of the first inner side wall 4, the second inner side wall 5 and the rib plate 2.

[0039] Moreover, a support block 3 is provided in each liquid cooling channel, and more support blocks 3 can be used to support the first inner side wall 4 and the second inner side wall 5, so that the support is more reliable and stable.

[0040] In some embodiments, if both ends of the rib plate 2 are directly connected to the first inner sidewall 4 and the second inner sidewall 5, and the thickness of the liquid cooling plate body 1 decreases and the first and second inner sidewalls 4 and 5 approach each other, the rib plate 2 rotates about its respective connection points with the first and second inner sidewalls 4 and 5. This causes concentrated stress at the connection points between the rib plate 2 and the first and second inner sidewalls 4 and 5. As the rib plate 2 rotates about the connection points multiple times, fatigue stress can easily cause the connection points between the rib plate 2 and the first and second inner sidewalls 4 and 5 to break, damaging the first and second inner sidewalls 4 and 5, potentially leading to leakage.

[0041] To solve the above problem, as an optional implementation method, Figures 1 to 3 As shown, multiple support blocks 3 are connected to both the first inner sidewall 4 and the second inner sidewall 5. The number of support blocks 3 on the first inner sidewall 4, the number of support blocks 3 on the second inner sidewall 5, and the number of ribs 2 are equal and correspond one-to-one. The support blocks 3 are arranged sequentially on the first inner sidewall 4, and sequentially on the second inner sidewall 5. The first end of each rib 2 is remotely connected to a support block 3 on the first inner sidewall 4, and the second end of each rib 2 is connected to a support block 3 on the second inner sidewall 5. This ensures that the ends of the ribs 2 are connected to the first inner sidewall 4 and the second inner sidewall 5, respectively, via corresponding support blocks 3. As the thickness of the liquid cooling plate body 1 decreases and the first and second inner sidewalls 4, 5 approach, the ribs 2 rotate about their respective connections with the support blocks 3. This creates concentrated stress at the connections between the ribs 2 and the support blocks 3 at both ends. As the ribs 2 rotate repeatedly about their connections, fatigue stresses can easily cause the connections between the ribs 2 and the support blocks 3 to break. Even if the connection between the rib 2 and the support blocks 3 at both ends breaks, it will not damage the first inner wall 4 and the second inner wall 5, causing coolant leakage. Instead, it will only cause the rib 2 to be disconnected from the support blocks 3, losing its separation function. The liquid cooling channels 7 on both sides will be connected to form a large liquid cooling channel 7, without affecting the circulation of coolant.

[0042] The first end of the rib 2 is connected to the side of the corresponding support block 3 near the second inner sidewall 5, near the side of the support block 3 connected to the second end of the rib 2, that is, connected to the corner of the support block 3 near the second end of the rib 2. The second end of the rib 2 is connected to the side of the corresponding support block 3 near the first inner sidewall 4, near the side of the support block 3 connected to the first end of the rib 2, that is, connected to the corner of the support block 3 near the first end of the rib 2. When the thickness of the liquid cooling plate body 1 decreases and the first inner sidewall 4 and the second inner sidewall 5 approach, the rib 2 rotates about its connection with the support block 3. At this time, concentrated stress is generated at the connection between the rib 2 and the support blocks 3 at both ends. As the rib 2 rotates about the connection multiple times, the support block 3 connected to the first end of the rib 2 abuts the second inner sidewall 5, and the support block 3 connected to the second end of the rib 2 abuts the first inner wall 4. At this time, a liquid cooling channel 7 is formed between the connecting block at the first end of the rib 2, the rib 2 and the first inner wall 4 to ensure the circulation of the coolant, and a liquid cooling channel 7 is formed between the connecting block at the second end of the rib 2, the rib 2 and the second inner wall 5 to ensure the circulation of the coolant.

[0043] It is worth noting that one end of the rib 2 can also be connected to the support block 3, while the other end is directly connected to the first inner wall 4 or the second inner wall 5. This arrangement can still solve the problem that the inner wall where the support block 3 connected to one end of the rib 2 is located may be damaged.

[0044] The liquid cooling plate body 1 and the battery cell 6 are not connected with glue on the large surface or there is a large relative sliding displacement, such as Figures 1 to 3 As shown, in some embodiments, the distance L between two adjacent support blocks 3 on the first inner wall 4 is equal to the distance between two adjacent support blocks 3 on the second inner wall 5 and is twice the length R of the rib plate 2 .

[0045] With this arrangement, when the thickness of the liquid cooling plate body 1 decreases and the first inner side wall 4 and the second inner side wall 5 approach each other, the ribs 2 rotate around their respective connections with the support blocks 3. As the ribs 2 rotate around the connection multiple times, until the support block 3 connected to the first end of the rib 2 abuts against the second inner side wall 5, and the support block 3 connected to the second end of the rib 2 abuts against the first inner side wall 4. At this time, the support block 3 connected to the first end of the rib 2 is located in the middle position between the two adjacent support blocks 3 on the second inner side wall 5. The distance between the support block 3 connected to the first end of the rib 2 and the support block 3 on the adjacent second inner side wall 5 is L1. Therefore, the distance between the support positions of each support block 3 is equal, so that the liquid cooling plate body 1 is more evenly supported by each support block 3, and the force is more stable. That is:

[0046] R=L1=0.5L

[0047] When the liquid cooling plate body 1 and the battery cell 6 are glued together over a large surface or the relative sliding displacement is small, in some embodiments, the distance L between two adjacent support blocks 3 on the first inner wall 4 is equal to the distance between two adjacent support blocks 3 on the second inner wall 5 and is twice the length of the projection of the rib 2 on the first inner wall 4 or the second inner wall 5. That is:

[0048] Rcosα=L1=0.5L

[0049] In an optional embodiment, the height H2 of the support block 3 is greater than the thickness t of the rib plate 2, so as to ensure that before the side wall of the rib plate 2 is attached to the first inner wall 4 or the second inner wall 5, the support block 3 can be against the first inner wall 4 or the second inner wall 5, so as to ensure that a liquid cooling channel 7 for the circulation of coolant can be formed between the support block 3 and the rib plate 2 and the first inner wall 4 or the second inner wall 5. Figures 1 to 3 As shown, the height H2 of the support block 3 is 0.5 mm to 4 mm, that is:

[0050] 0.5mm≤H2≤4mm

[0051] The height H2 of the support block 3 may be 0.5 mm, 4 mm, 1 mm, 2 mm or 3 mm.

[0052] Furthermore, if Figures 1 to 3 As shown, the thickness t of the rib 2 is 0.25 mm to 1.2 mm, that is:

[0053] 0.25mm≤t≤1.2mm

[0054] The thickness t of the rib 2 can be 0.25 mm, 1.2 mm, 0.5 mm, 0.8 mm or 1 mm.

[0055] In an optional embodiment, if Figures 1 to 3 As shown, the width B of the support block 3 is 1.2 mm to 10 mm, that is:

[0056] 1.2mm≤B≤10mm

[0057] The width B of the support block 3 may be 1.2 mm, 10 mm, 3 mm, 5 mm or 8 mm.

[0058] Furthermore, if Figures 1 to 3 As shown, the distance H1 between the support blocks 3 of the first inner side wall 4 and the second inner side wall 5 is 1 mm to 6 mm, that is:

[0059] 1mm≤H1≤6mm

[0060] The distance H1 between the support blocks 3 of the first inner side wall 4 and the second inner side wall 5 can be 1 mm, 6 mm, 2 mm, 3 mm or 5 mm.

[0061] In an optional embodiment, if Figures 1 to 3 As shown, the total number n of the support blocks 3 on the first inner side wall 4 and the second inner side wall 5 is 6 to 32, that is:

[0062] 6≤n≤32

[0063] The total number n of the support blocks 3 on the first inner side wall 4 and the second inner side wall 5 can be 6, 32, 12, 22 or 30.

[0064] Furthermore, if Figures 1 to 3 As shown, the distance L between two adjacent support blocks 3 on the first inner side wall 4 is 5 mm to 16 mm, that is:

[0065] 5mm≤L≤16mm

[0066] The distance L between two adjacent support blocks 3 on the first inner side wall 4 may be 5 mm, 16 mm, 8 mm, 10 mm or 12 mm.

[0067] In an optional embodiment, if Figures 1 to 3 As shown, the inclination angle α of the rib plate 2 relative to the first inner side wall 4 is the same as the inclination angle of the rib plate 2 relative to the second inner side wall 5. The inclination angle α of the rib plate 2 relative to the first inner side wall 4 is 15 degrees to 85 degrees. That is:

[0068] 15°≤α≤85°

[0069] The inclination angle α of the first inner side wall 4 may be 15 degrees, 85 degrees, 25 degrees, 45 degrees or 60 degrees.

[0070] In an optional embodiment, the width of the liquid cooling plate body 1 is 90 mm to 120 mm, wherein the width of the liquid cooling plate body 1 can be 90 mm, 100 mm, or 120 mm.

[0071] According to an embodiment of the present application, another aspect provides a battery comprising any of the above liquid cooling plates. The technical effects of the battery are consistent with those of the liquid cooling plate, so details will not be given here.

[0072] According to an embodiment of the present application, in another aspect, a vehicle is provided, comprising the battery described above. The technical effects of the vehicle are the same as those of the battery, so they will not be described in detail.

[0073] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the present application.

Claims

1. A liquid cooling plate, characterized in that: include: A liquid cooling plate body (1) is provided with a cavity therein; A plurality of ribs (2) are sequentially arranged in the cavity, a first end of the rib (2) is connected to a first inner wall (4) of the cavity, a second end of the rib (2) is connected to a second inner wall (5) of the cavity, and the plurality of ribs (2) divide the cavity into a plurality of liquid cooling channels (7) for circulating cooling liquid; A plurality of support blocks (3) are connected to at least one of the first inner side wall (4), the second inner side wall (5) and the rib plate (2).

2. The liquid cooling plate according to claim 1, wherein: The support block (3) is connected to both the first inner side wall (4) and the second inner side wall (5); the first end of the rib plate (2) is connected to the support block (3) on the first inner side wall (4); and the second end of the rib plate (2) is connected to the support block (3) on the second inner side wall (5).

3. The liquid cooling plate according to claim 2, wherein: The length of the rib plate (2) is half the distance between two adjacent support blocks (3).

4. The liquid cooling plate according to claim 2, wherein: The projected length of the rib plate (2) on the first inner side wall (4) is half the distance between two adjacent support blocks (3).

5. The liquid cooling plate according to claim 2, wherein: The height of the support block (3) is greater than the thickness of the rib plate (2), wherein: The support block (3) has a height of 0.5 mm to 4 mm; And / or, the thickness of the rib (2) is 0.25 mm to 1.2 mm.

6. The liquid cooling plate according to claim 2, wherein: The width of the support block (3) is 1.2 mm to 10 mm; And / or, the distance between the support blocks (3) on the first inner side wall (4) and the second inner side wall (5) is 1 mm to 6 mm.

7. The liquid cooling plate according to claim 2, wherein: The number of the support blocks (3) on the first inner side wall (4) and the second inner side wall (5) is 6 to 32; And / or, the distance between two adjacent support blocks (3) on the first inner side wall (4) or the second inner side wall (5) is 5 mm to 16 mm.

8. The liquid cooling plate according to any one of claims 1 to 7, characterized in that: The plurality of ribs (2) are all arranged obliquely in the cavity, and the inclination angle of the ribs (2) relative to the first inner side wall (4) or the second inner side wall (5) is 15 degrees to 85 degrees.

9. A battery, characterized in that: Comprising the liquid cooling plate according to any one of claims 1 to 8.

10. A vehicle, characterized in that: A battery comprising the battery of claim 9.

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