Cooling device and battery pack

Abstract

The invention relates to the technical field of battery packs, and discloses a cooling device and a battery pack. The cooling device comprises a support, a flow guide pipe and a driving piece. The bracket is provided with bearing surfaces which are oppositely arranged, at least one bearing surface is used for mounting a battery cell, a heat dissipation channel is arranged in the bracket, and the heat dissipation channel is provided with a first channel opening; the flow guide pipe is arranged on one side of the first channel opening, and the outer side space of the flow guide pipe is used for mounting a battery cell. The guide pipe is arranged on one side of the first channel opening, and the outer side space of the guide pipe is used for mounting the battery cell, so that the end part of the battery cell is exposed in an external environment which is not shielded by the guide pipe, an operation space is provided for an operator, the cylindrical battery cell is convenient to operate for electrical connection, and the assembly efficiency is improved. And the flow guide pipe is communicated with the driving part and the heat dissipation channel, so that the cooling medium can be accurately guided and collected, the cooling medium is conveyed into the heat dissipation channel of the bracket, the dispersion loss of the cooling medium is avoided, and the heat dissipation efficiency of the battery cell is improved.

Description

Technical Field

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

[0002] In related technologies, the thermal management design of cylindrical battery cell modules typically involves opening multiple heat dissipation ducts on the battery bracket and installing a fan on one side of the battery bracket. A pipe connects the fan to the heat dissipation ducts, and the fan drives cooling air through the pipe into the multiple heat dissipation ducts.

[0003] While the above-mentioned setup achieves forced air cooling of the battery cell, in most cases the end of the cylindrical battery cell is contained within the internal space of the pipe, resulting in limited operating space when the cylindrical battery cell is connected to the external circuit. Summary of the Invention

[0004] This application provides a cooling device and a battery pack to solve or improve the problem that the end of the existing cylindrical battery cell is housed in the internal space of the pipe, resulting in limited operating space when the cylindrical battery cell is connected to an external circuit.

[0005] In a first aspect, this application provides a cooling device, including a bracket, a guide tube, and a driving component. The bracket has opposing bearing surfaces, at least one of which is used to mount a battery cell. A heat dissipation channel is provided within the bracket, and the heat dissipation channel has a first channel opening. The guide tube is disposed on one side of the first channel opening, and the space outside the guide tube is used to mount the battery cell. The guide tube has a first flow port and a second flow port, and the first flow port communicates with the first channel opening. The driving component is used to drive the flow of a cooling medium, and the driving component communicates with the second flow port.

[0006] Beneficial effects: By placing the guide tube on one side of the first channel opening and using the space outside the guide tube for installing the battery cell, the end of the battery cell is exposed to the external environment without the obstruction of the guide tube. This provides operators with operating space, facilitating the electrical connection of the cylindrical battery cell and improving assembly efficiency. Furthermore, the guide tube connects the drive component and the heat dissipation channel, enabling more precise guidance and collection of the cooling medium. This ensures the cooling medium is delivered to the heat dissipation channel of the bracket, preventing cooling medium dispersion and loss, and improving the heat dissipation efficiency of the battery cell.

[0007] In one alternative embodiment, the cross-sectional area of ​​the guide tube gradually increases in the direction from the first guide port to the second guide port.

[0008] Beneficial effects: The guide tube maintains a small cross-sectional size near the first channel opening of the support, which reduces the space occupied by the guide tube at the first channel opening, thereby further improving the operating space at the end of the cylindrical cell. Furthermore, the guide tube has a larger cross-sectional area at the second channel opening, allowing the second channel opening to accommodate the drive component and facilitating its assembly.

[0009] In one optional embodiment, the guide pipes are respectively provided on both sides of the bracket, and the heat dissipation channel has the first channel openings arranged opposite to each other, with the first guide opening of each guide pipe communicating with each of the first channel openings.

[0010] Beneficial effects: By installing guide tubes on both sides of the bracket, the cooling medium can be guided to flow in from one end of the heat dissipation channel and out from the other end, improving the heat dissipation efficiency of the battery cell. Furthermore, both sides of the battery cell provide a relatively spacious operating area, facilitating electrical connections.

[0011] In one alternative embodiment, an annular groove is formed on the surface of the support facing the guide tube, and a sealing ring is disposed in the annular groove, wherein the surface of the guide tube facing the support is in sealing contact with the sealing ring.

[0012] Beneficial effects: The sealing ring at the connection interface between the bracket and the guide tube effectively prevents the cooling medium from leaking at the connection between the bracket and the guide tube, improves the utilization efficiency of the cooling medium, and thus improves the heat dissipation efficiency of the battery cell.

[0013] In one optional embodiment, the guide tube includes two half-pipe sections, which are joined together to form the guide cavity of the guide tube. Flanges are respectively provided on the outer side walls of the two half-pipe sections. A solder layer is provided on the surface of at least one flange facing the other flange. A first fastener is connected between the two flanges. On the surfaces of the two half-pipe sections that are close to each other, one of them is provided with a protrusion and the other is provided with a recess that matches the protrusion.

[0014] Beneficial effects: Dividing the guide tube into two half-sections makes each half-section easier to manufacture. Furthermore, a solder layer and a first fastener are provided between the flanges of the two half-sections, which enables the two half-sections to be connected and fixed and to maintain a seal between them. On the surfaces of the two half-sections that are close to each other, the protrusions and recesses cooperate to further improve the sealing effect between the two half-sections.

[0015] In one alternative embodiment, at least one of the flanges is provided with a connecting arm, which is connected to the bracket.

[0016] Beneficial effects: By setting a connecting arm on the flange, the connecting arm can be connected to the bracket, which makes it easier to assemble the guide tube onto the bracket as a whole, reduces the difficulty of assembling the guide tube, and improves the assembly strength of the guide tube.

[0017] In one optional embodiment, a plurality of first arc-shaped grooves are arranged on the bearing surface, each of the first arc-shaped grooves being used to house the respective battery cell, and a thermally conductive adhesive layer is provided on the inner wall of the first arc-shaped groove.

[0018] Beneficial effects: By setting a thermally conductive adhesive layer between the inner wall of the first arc-shaped groove and the outer surface of the battery cell, on the one hand, the thermally conductive adhesive layer facilitates the fixing of the battery cell in the first arc-shaped groove, and on the other hand, the thermally conductive adhesive layer enables the heat generated by the battery cell to be quickly conducted to the bracket, thereby improving the heat dissipation efficiency of the battery cell and effectively suppressing the temperature rise of the battery cell.

[0019] In one optional embodiment, the device further includes a sleeve, which is fitted onto the outside of the support and cooperates with the support to clamp the battery cell; wherein, the sleeve is provided with a second arc-shaped groove, each of the second arc-shaped grooves corresponding to each of the first arc-shaped grooves, and the second arc-shaped grooves are adapted to the outer surface of the battery cell; and / or, the sleeve is provided with heat dissipation fins.

[0020] Beneficial effects: The first and second arc-shaped grooves work together to constrain the battery cell, increasing its installation strength and thus improving the mechanical strength and overall rigidity of the battery module under vibration and impact conditions. Furthermore, heat dissipation fins on the frame enhance its heat dissipation efficiency, further improving the battery cell's heat dissipation efficiency.

[0021] In one optional embodiment, a first temperature detection element is provided inside the flow guide tube; and / or, a second temperature detection element is provided on the frame, wherein the detection end of the second temperature detection element is used to correspond to the battery cell.

[0022] Beneficial effects: By installing a first temperature sensor inside the heat dissipation tube, the temperature of the cooling medium entering or leaving the heat dissipation channel can be detected in real time, thereby enabling the evaluation of the cooling medium's heat dissipation efficiency on the battery cell. A second temperature sensor is installed on the housing, directly acquiring the actual surface temperature of the battery cell during operation, thus enabling real-time monitoring of the battery cell's status.

[0023] In one alternative embodiment, a plurality of spaced-apart support plates are provided in the heat dissipation channel, and each support plate extends along the extension direction of the heat dissipation channel.

[0024] Beneficial effects: Installing support plates within the heat dissipation channel serves two purposes. First, the support plates act as reinforcing ribs, enhancing the overall strength of the heat dissipation channel. Furthermore, the spaced arrangement of multiple support plates divides the heat dissipation channel into multiple parallel sub-channels, allowing the cooling medium to flow more orderly along a predetermined path. This ensures sufficient heat exchange between the cooling medium and the support structure, improving the heat dissipation efficiency of the battery cell.

[0025] Secondly, this application also provides a battery pack, including a battery cell and the aforementioned cooling device, wherein the battery cell is disposed on the bearing surface of the bracket.

[0026] Beneficial effects: The aforementioned battery pack includes a cooling device with a guide tube. By placing the guide tube on one side of the first channel opening and using the space outside the guide tube for mounting the battery cells, the ends of the battery cells are exposed to the external environment without the obstruction of the guide tube. This provides operating space for operators, facilitating the electrical connection of the cylindrical battery cells and improving assembly efficiency. Furthermore, the guide tube connects the drive component and the heat dissipation channel, enabling more precise guidance and collection of the cooling medium. This allows the cooling medium to be delivered to the heat dissipation channel of the bracket, preventing cooling medium dispersion and loss, and improving the heat dissipation efficiency of the battery cells.

[0027] In an alternative embodiment, a CCS assembly is further included, which is disposed at the end of the cell and located in the outer space of the flow guide tube, and the CCS assembly is electrically connected to the cell.

[0028] Beneficial effects: The end of the battery cell is exposed on the outside of the cooling tube. Installing the CCS assembly at the end of the battery cell effectively avoids interference from the cooling tube, improving the assembly efficiency of the CCS assembly. Furthermore, the separation of the CCS assembly and the cooling medium through the cooling tube effectively prevents interference from the cooling medium, ensuring the normal operation of the CCS assembly. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the cooling device according to an embodiment of this application; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 for Figure 3 A magnified view of a section at point B in the middle; Figure 6 This is a schematic diagram of the structure of the guide tube according to an embodiment of this application; Figure 7 This is a schematic diagram showing the positional relationship between the first arc-shaped groove and the second arc-shaped groove in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the bracket according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures: 100. Battery cell; 200. CCS module; 1. Bracket; 101. Bearing surface; 102. First arc-shaped groove; 103. Thermally conductive adhesive layer; 2. Heat dissipation channel; 201. First channel opening; 202. Support plate; 3. Guide pipe; 301. First guide port; 302. Second guide port; 303. Half pipe section; 304. Guide cavity; 305. Flanged edge; 4. Drive component; 5. Annular groove; 6. Sealing ring; 7. Solder layer; 8. First fastener; 9. Protrusion; 10. Recess; 11. Connecting arm; 12. Sleeve; 1201. Second arc-shaped groove; 1202. Heat dissipation fins; 13. First temperature sensing element; 14. Second temperature sensing element; 15. Second fastener; 16. Third fastener; 17. First temperature acquisition and fixing structure; 18. Second temperature acquisition and fixing structure. Detailed Implementation

[0032] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In related technologies, the thermal management design of cylindrical battery cell modules typically involves creating multiple heat dissipation ducts on the battery bracket and installing a fan on one side of the battery bracket. Pipes connect the fan to the heat dissipation ducts, and the fan drives cooling air through these pipes into the ducts. However, in most cases, the ends of the cylindrical battery cells are housed within the internal space of these pipes. This creates a space constraint when connecting the ends of the cylindrical battery cells to external circuits or installing electrical components. Furthermore, the cooling medium can easily interfere with the electrical components, affecting their normal operation.

[0034] To solve the above problems, the following will combine... Figures 1 to 8 This describes an embodiment of the present application.

[0035] According to an embodiment of this application, in a first aspect, this application provides a cooling device, including a bracket 1, a guide pipe 3, and a driving component 4. The bracket 1 may be an aluminum extrusion with a certain strength, and the bracket 1 has opposing bearing surfaces 101, at least one of which is used to mount cylindrical battery cells 100. Specifically, multiple cylindrical battery cells 100 are mounted on one or both bearing surfaces 101 of the bracket 1, and the multiple cylindrical battery cells 100 are arranged on the bearing surfaces 101. A heat dissipation channel 2 is provided inside the bracket 1. The heat dissipation channel 2 may be a cavity integrally formed inside the bracket 1 by a mold, such that the heat dissipation channel 2 is located between the two opposing bearing surfaces 101. The extending direction of the heat dissipation channel 2 may be perpendicular to the arrangement direction of the multiple battery cells 100. The heat dissipation channel 2 has a first channel opening 201, through which the heat dissipation channel 2 communicates with the outside.

[0036] like Figure 1 , Figure 4 As shown, the guide tube 3 is disposed on one side of the first channel opening 201, and the outer space of the guide tube 3 is used to install the battery cell 100. The guide tube 3 has a first guide port 301 and a second guide port 302, and the first guide port 301 is connected to the first channel opening 201. In this way, the end of the battery cell 100 is correspondingly disposed with the first channel opening 201 on the heat dissipation channel 2, and the area between the outer side of the guide tube 3 and the end of the battery cell 100 is left empty, so that the guide tube 3 avoids the end of the battery cell 100.

[0037] like Figure 1 , Figure 2As shown, the driving component 4 is used to drive the flow of the cooling medium, and the driving component 4 is connected to the second guide port 302. Specifically, the cooling medium can be cooling air, coolant, or other cooling media with heat exchange function, and the driving component 4 can be a fan, pump, or similar fluid drive device. When the cooling medium is cooling air, the driving component 4 can be configured as a fan or blower to drive the flow of cooling air. When the cooling medium is coolant, the driving component 4 can be configured as a driving pump to drive the flow of coolant. The following description uses cooling air as an example of the cooling medium.

[0038] In this embodiment, during operation, the drive unit 4 is activated to send cooling air into the guide pipe 3. The cooling air is collected in the guide pipe 3 and guided by the guide pipe 3. The cooling air in the guide pipe 3 is sent into the heat dissipation channel 2 of the bracket 1 through the first guide port 301. During the process of the cooling air flowing through the heat dissipation channel 2, it exchanges heat with the inner wall surface of the heat dissipation channel 2, thereby carrying away the heat conducted from the battery cell 100 to the bracket 1, and realizing efficient and forced air cooling of the battery cell 100.

[0039] This configuration, by placing the guide pipe 3 on one side of the first channel opening 201 and using the space outside the guide pipe 3 for installing the battery cell 100, exposes the end of the battery cell 100 to the external environment without the obstruction of the guide pipe 3. This provides operating space for operators, facilitating the electrical connection of the cylindrical battery cell 100 and improving assembly efficiency. Furthermore, the guide pipe 3 connects the drive component 4 and the heat dissipation channel 2, enabling precise guidance and collection of the cooling medium. This ensures the cooling medium is delivered to the heat dissipation channel 2 of the bracket 1, preventing cooling medium dispersion and loss, and improving the heat dissipation efficiency of the battery cell 100. Additionally, when electrical components such as the CCS assembly 200 are installed at the end of the battery cell 100, the guide pipe 3 separates the CCS assembly 200 from the cooling medium, effectively preventing interference from the cooling medium and ensuring the normal operation of the CCS assembly 200.

[0040] In one embodiment, in order to further improve the operating space of the end region of the battery cell 100, the cross-sectional area of ​​the guide tube 3 is gradually increased in the direction from the first guide port 301 to the second guide port 302.

[0041] In this embodiment, as Figure 1 , Figure 3 , Figure 6As shown, the dimensions of the guide tube 3 gradually increase in the direction extending from the first guide port 301 to the second guide port 302, especially in the thickness direction of the guide tube 3, thus gradually increasing the cross-sectional dimension of the guide tube 3 and forming a gradually expanding channel structure. For example, the guide tube 3 can be configured as a tapered tube, a trumpet-shaped tube, or a similar gradually expanding shape, wherein the cross-sectional area of ​​the first guide port 301 is smaller than the cross-sectional area of ​​the second guide port 302. Specifically, the cross-section of the heat dissipation channel 2 can be rectangular, which, while ensuring effective heat dissipation of the heat dissipation channel 2, can reduce the space occupied by the heat dissipation channel 2 in the thickness direction of the support 1, thereby making the overall structure of the support 1 more compact. The first guide port 301 is close to the first channel opening 201 of the heat dissipation channel 2, and the cross-section of the first guide port 301 can be slightly larger than the first channel opening 201, so that the first guide port 301 is fitted outside the first channel opening 201, maintaining the sealing performance between the two.

[0042] With this configuration, the first flow guide 301 has a smaller cross-sectional area and occupies less space at the first channel opening 201, effectively reducing the space occupied by the flow guide 3 around the end of the battery cell 100, thus providing more operating space at the end of the battery cell 100. The second flow guide 302 has a relatively larger cross-sectional area, and a driving component 4 can be installed inside the second flow guide 302. The driving component 4 can be fixed to the inner wall of the second flow guide 302 by means of flange connection, threaded connection, or snap-fit ​​connection to ensure the sealing and installation strength between the driving component 4 and the flow guide 3.

[0043] Optionally, in addition to the gradual increase in size of the guide tube 3 in the direction extending from the first guide port 301 to the second guide port 302, especially in the thickness direction of the guide tube 3, the size of the guide tube 3 can be adaptively set to gradually decrease in the direction perpendicular to the first guide port 301 to the second guide port 302. In this way, on the one hand, the size of the second guide port 302 is adapted to the drive member 4, and on the other hand, the space occupied by the guide tube 3 can be further reduced, making the overall structure of the cooling device compact.

[0044] In one embodiment, the support 1 is provided with a guide pipe 3 on both sides, and the heat dissipation channel 2 has a first channel opening 201 arranged opposite to each other. The first guide opening 301 of each guide pipe 3 is connected to each first channel opening 201.

[0045] In this embodiment, as Figure 1 , Figure 2As shown, the bracket 1 has a first channel port 201 on two sides perpendicular to the direction in which the multiple cells 100 are arranged. One of the first channel ports 201 is used as a cooling medium inlet and the other is used as a cooling medium outlet. A guide pipe 3 is installed on the two first channel ports 201 respectively, and the cross-sectional area of ​​the two guide pipes 3 gradually increases from the first guide port 301 near the bracket 1 to the second guide port 302 away from the bracket 1.

[0046] In this way, by setting guide pipes 3 on both sides of the bracket 1, the cooling medium can flow in from one guide pipe 3 during operation, cool the battery cell 100 through the heat dissipation channel 2, and then flow out from the other guide pipe 3, thereby improving the heat dissipation efficiency of the battery cell 100. Furthermore, both sides of the battery cell 100 provide a relatively spacious operating area, facilitating electrical connections.

[0047] In one embodiment, in order to improve the sealing effect at the connection between the guide pipe 3 and the heat dissipation channel 2, an annular groove 5 is provided on the surface of the bracket 1 facing the guide pipe 3, and a sealing ring 6 is provided in the annular groove 5, so that the surface of the guide pipe 3 facing the bracket 1 is in sealing contact with the sealing ring 6.

[0048] In this embodiment, as Figure 4 As shown, the annular groove 5 can be configured as a ring structure. The specific shape of the annular groove 5 can be adaptively adjusted according to the cross-sectional shape of the first guide port 301, so that the contour of the annular groove 5 matches the shape of the first guide port 301 of the guide tube 3. A sealing ring 6 is provided in the annular groove 5. The sealing ring 6 can be slightly larger than the depth of the annular groove 5 in the free state to ensure that sufficient deformation can be generated when the sealing ring 6 is compressed. When the guide tube 3 is fixed on the bracket 1, the surface of the guide tube 3 facing the sealing ring 6 contacts the sealing ring 6, causing the sealing ring 6 to undergo elastic deformation under pressure to fill the gap between the guide tube 3 and the bracket 1, so that a reliable sealing contact is formed at the connection interface between the two, thereby effectively preventing the cooling medium from leaking at the connection between the bracket 1 and the guide tube 3, improving the utilization efficiency of the cooling medium, and thus improving the heat dissipation efficiency of the battery cell 100.

[0049] In one embodiment, to facilitate the production of the guide tube 3, the guide tube 3 includes two half-pipe sections 303, which are joined together to form the guide cavity 304 of the guide tube 3. Flanges 305 are respectively provided on the outer side walls of the two half-pipe sections 303; wherein, at least one flange 305 is provided with a solder layer 7 on the surface facing the other flange 305; and / or, a first fastener 8 is connected between the two flanges 305; and / or, on the surfaces of the two half-pipe sections 303 that are close to each other, one of them is provided with a protrusion 9, and the other is provided with a recess 10 adapted to the protrusion 9.

[0050] In this embodiment, as Figure 5 As shown, the guide pipe 3 adopts a split structure, consisting of two half-pipe segments 303. This simplifies the structure of each half-pipe segment 303, facilitating high-precision and low-cost manufacturing through processes such as injection molding and stamping. The two half-pipe segments 303 are joined together to form a complete guide cavity 304, which is used for the flow of cooling medium. This guide cavity 304 has the aforementioned first guide port 301 and second guide port 302. On the outer wall of each half-pipe segment 303, a flange 305 extends along its edge. The flanges 305 on the two half-pipes correspond to each other when joined, providing a connection basis for the two segments.

[0051] Specifically, such as Figure 5 As shown, a solder layer 7 is provided on the surface of at least one flange 305 facing the other flange 305. This solder layer 7 can be pre-coated onto the surface of the flange 305. After the two half-pipe segments 303 are aligned and joined, the solder can be melted by ultrasonic welding and solidified after cooling, thereby firmly connecting the two half-pipe segments 303 and achieving a seal at the joint. Of course, other processes can also be used to heat the solder, and the specific material of the solder can be adapted to different welding processes.

[0052] like Figure 1 As shown, a first fastener 8 is provided between the two flanges 305. The first fastener 8 can be a bolt and a nut, with corresponding through holes opened on the flanges 305, and the two half-pipe sections 303 are locked and fixed by the cooperation of the bolt and nut. Alternatively, the first fastener 8 can also be a rivet, screw or other fastening structure, which connects and fixes the two half-pipe sections 303, improves the connection strength of the two half-pipe sections 303, and ensures the stability of the guide pipe 3 in a vibration environment.

[0053] like Figure 5 As shown, to further improve the sealing effect of the two half-pipe sections 303, mutually cooperating protrusions 9 and recesses 10 are provided on the mating surfaces of the two half-pipe sections 303 that are close to each other. One half-pipe section 303 has a protrusion 9 on its mating surface, which can be a continuous or discontinuous protrusion or ridge. Simultaneously, the other half-pipe section 303 has a recess 10 on its mating surface, which can be a continuous or discontinuous groove. When the two half-pipe sections 303 are joined, the protrusion 9 can be embedded in the recess 10, thereby forming a labyrinthine sealing structure, effectively preventing cooling medium leakage and enhancing the sealing reliability of the guide cavity 304.

[0054] In one embodiment, in order to facilitate the assembly of the guide tube 3 onto the bracket 1, at least one flange 305 is provided with a connecting arm 11, which is connected to the bracket 1.

[0055] In this embodiment, as Figure 1 , Figure 2 As shown, two connecting arms 11 are preferably provided, and the two connecting arms 11 are respectively located on both sides of the guide tube 3 to improve the connection strength between the guide tube 3 and the support 1. The connecting arm 11 can be separately provided from the flange 305 or integrally formed, so that one end of the connecting arm 11 is fixedly connected to the flange 305, and the other end of the connecting arm 11 can be fixedly connected to the support 1 through the second fastener 15. With this configuration, by providing the connecting arm 11 on the flange 305, the connecting arm 11 can be connected to the support 1, which facilitates the overall assembly of the guide tube 3 onto the support 1, reduces the assembly difficulty of the guide tube 3, and improves the assembly strength of the guide tube 3.

[0056] Optionally, the second fastener 15 can be a bolt, rivet or screw, with through holes made at corresponding positions on the connecting arm 11 and the bracket 1, so that the guide tube 3 can be easily fixed on the bracket 1 by means of the second fastener 15.

[0057] In one embodiment, a plurality of first arc-shaped grooves 102 are arranged on the bearing surface 101, each first arc-shaped groove 102 is used to set each battery cell 100, and a thermally conductive adhesive layer 103 is provided on the inner wall of the first arc-shaped groove 102.

[0058] In this embodiment, as Figure 7 As shown, when assembling the cylindrical battery cell 100, a first arc-shaped groove 102 is provided on the bearing surface 101, and the inner wall of the first arc-shaped groove 102 is adapted to the outer wall of the cylindrical battery cell 100 to ensure that the battery cell 100 can be accommodated within the first arc-shaped groove 102. A thermally conductive adhesive layer 103 is provided within the first arc-shaped groove 102. The thermally conductive adhesive layer 103 can be formed by coating, filling, or injection, and preferably, the thermally conductive adhesive layer 103 is made of an adhesive material with a relatively high thermal conductivity and a certain bonding strength.

[0059] With this configuration, by setting a thermally conductive adhesive layer 103 between the inner wall of the first arc-shaped groove 102 and the outer surface of the battery cell 100, on the one hand, the thermally conductive adhesive layer 103 facilitates the fixing of the battery cell 100 in the first arc-shaped groove 102, and on the other hand, the thermally conductive adhesive layer 103 enables the heat generated by the battery cell 100 during operation to be quickly conducted to the bracket 1, thereby improving the heat dissipation efficiency of the battery cell 100 and effectively suppressing the temperature rise of the battery cell 100.

[0060] In one embodiment, the device further includes a sleeve 12, which is sleeved on the outside of the bracket 1 and cooperates with the bracket 1 to clamp the battery cell 100; wherein, the sleeve 12 is provided with a second arc-shaped groove 1201, each second arc-shaped groove 1201 corresponds to each first arc-shaped groove 102, and the second arc-shaped groove 1201 is adapted to the outer surface of the battery cell 100; and / or, the sleeve 12 is provided with heat dissipation fins 1202.

[0061] In this embodiment, as Figure 7 As shown, the sleeve 12 is preferably made of engineering plastic or metal thermally conductive material to give it high strength and thermal conductivity. The shape of the sleeve 12 is adapted to the shape of the bracket 1, and each of the second arc-shaped grooves 1201 on the sleeve 12 corresponds to the position of each of the first arc-shaped grooves 102 on the bearing surface 101. After the battery cell 100 is installed into the first arc-shaped groove 102, the sleeve 12 can be fitted onto the outside of the bracket 1, and each of the second arc-shaped grooves 1201 and the corresponding first arc-shaped grooves 102 together form an annular fixing cavity to accommodate and constrain the battery cell 100, thereby improving the installation strength of the battery cell 100 and thus improving the mechanical strength and overall rigidity of the battery module under vibration, impact and other conditions.

[0062] Optionally, the sleeve 12 is provided with a third fastener 16, which can also be a bolt, screw, or rivet. After the sleeve 12 moves to the preset position, the sleeve 12 is fixed to the bracket 1 by the third fastener 16, thereby improving the connection strength between the sleeve 12 and the bracket 1.

[0063] Furthermore, such as Figure 7 As shown, heat dissipation fins 1202 can be provided on the frame 12. The heat dissipation fins 1202 can be provided on the outer surface of the frame 12 away from the cell 100. The heat dissipation fins 1202 increase the heat dissipation area of ​​the outer surface of the frame 12, improve the heat dissipation efficiency of the frame 12, and thus further improve the heat dissipation efficiency of the cell 100.

[0064] In one implementation, a first temperature detection element 13 is provided inside the flow guide tube 3; and / or, a second temperature detection element 14 is provided on the sleeve 12, the detection end of the second temperature detection element 14 being used to correspond to the battery cell 100.

[0065] In this embodiment, as Figure 6As shown, a first temperature acquisition and fixing structure 17 can be provided inside the guide tube 3. A first temperature detection element 13 is disposed inside the guide tube 3 and mounted on the first temperature acquisition and fixing structure 17, thereby fixing the position of the first temperature detection element 13 within the guide cavity 304. The first temperature detection element 13 can be disposed at any position in the inlet area, outlet area, or middle of the guide tube 3. Preferably, the first temperature detection element 13 is disposed near the second guide port 302. When the guide tubes 3 are respectively disposed on both sides of the bracket 1, the first temperature detection element 13 on one guide tube 3 is close to the drive element 4, that is, close to the input end of the cooling medium, and the first temperature detection element 13 on the other guide tube 3 is close to the output end of the cooling medium. In this way, by setting the first temperature detection element 13 in different guide tubes 3, the temperature of the cooling medium entering and leaving the heat dissipation channel 2 can be detected in real time, thereby enabling the evaluation of the heat dissipation efficiency of the cooling medium on the battery cell 100.

[0066] like Figure 7 As shown, a second temperature acquisition and fixing structure 18 is provided on the frame 12, and a second temperature detection element 14 is installed on the second temperature acquisition and fixing structure 18. The second temperature detection element 14 can directly acquire the actual surface temperature of the battery cell 100 during operation. Specifically, the second temperature detection element 14 can be set individually for each battery cell 100, or it can be arranged between two adjacent battery cells 100, or selectively arranged at key temperature measurement points. By directly monitoring the temperature of the battery cell 100, the actual working status of the battery cell 100 can be grasped in real time, abnormal temperature rise of the battery cell 100 can be detected in time, and the safe operation of the battery cell 100 can be ensured.

[0067] Optionally, both the first temperature sensing element 13 and the second temperature sensing element 14 can be a thermistor, a thermocouple, or a digital temperature sensor. Furthermore, the first temperature sensing element 13 and the second temperature sensing element 14 can transmit the acquired temperature signals to the battery management system via wired or wireless means.

[0068] In one embodiment, a plurality of spaced support plates 202 are provided in the heat dissipation channel 2, and each support plate 202 extends along the extension direction of the heat dissipation channel 2.

[0069] In this embodiment, as Figure 8 As shown, each support plate 202 is fixed to the inner wall of the heat dissipation channel 2. On the one hand, the multiple support plates 202 can act as reinforcing ribs, improving the overall strength of the heat dissipation channel 2, effectively suppressing deformation of the heat dissipation channel 2, and improving the overall strength of the bracket 1. On the other hand, the multiple support plates 202 are spaced apart, which can divide the heat dissipation channel 2 into multiple parallel sub-channels, allowing the cooling medium to flow more orderly along the preset path, ensuring sufficient heat exchange between the cooling medium and the bracket 1, and improving the heat dissipation efficiency of the battery cell 100.

[0070] Of course, in addition to being arranged in parallel, multiple support plates 202 can also be combined to form different types of flow channel structures, so as to support the heat dissipation channel 2 and improve the heat dissipation efficiency of the cooling medium.

[0071] Secondly, this application also provides a battery pack, including a battery cell 100 and the aforementioned cooling device, wherein the battery cell 100 is disposed on the bearing surface 101 of the bracket 1.

[0072] In this embodiment, the battery pack includes a cooling device with a guide pipe 3. The guide pipe 3 is positioned on one side of the first channel opening 201, and the space outside the guide pipe 3 is used to install the battery cell 100. This exposes the end of the battery cell 100 to the external environment without the obstruction of the guide pipe 3, providing operating space for the operator and facilitating electrical connection of the cylindrical battery cell 100, thus improving assembly efficiency. Furthermore, the guide pipe 3 connects the drive component 4 and the heat dissipation channel 2, enabling precise guidance and collection of the cooling medium. This allows the cooling medium to be delivered to the heat dissipation channel 2 of the support 1, preventing cooling medium dispersion and loss, and improving the heat dissipation efficiency of the battery cell 100.

[0073] In one embodiment, such as Figure 1 As shown, it also includes a CCS component 200, which is disposed at the end of the cell 100 and located in the outer space of the guide tube 3. The CCS component 200 is electrically connected to the cell 100.

[0074] In this embodiment, the end of the battery cell 100 is exposed outside the guide tube 3. After the sleeve 12 is installed outside the bracket 1, the CCS assembly 200 is then installed on the end of the battery cell 100. This effectively avoids interference from the guide tube 3 with the CCS assembly 200, improving the assembly efficiency of the CCS assembly 200. Furthermore, the CCS assembly 200 and the cooling medium are separated by the guide tube 3, effectively preventing the cooling medium from interfering with the CCS assembly 200 and ensuring that the CCS assembly 200 can maintain normal operation.

[0075] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A cooling device, characterized in that, include: A bracket (1) has a bearing surface (101) arranged opposite to each other, and at least one of the bearing surfaces (101) is used to install a battery cell (100). A heat dissipation channel (2) is provided inside the bracket (1), and the heat dissipation channel (2) has a first channel opening (201). A flow guide tube (3) is provided on one side of the first channel opening (201), and the outer space of the flow guide tube (3) is used to install the battery cell (100). The flow guide tube (3) has a first flow guide port (301) and a second flow guide port (302). The first flow guide port (301) is connected to the first channel opening (201). A drive unit (4) is used to drive the flow of cooling medium, and the drive unit (4) is connected to the second guide port (302).

2. The cooling device according to claim 1, characterized in that, The cross-sectional area of ​​the guide pipe (3) gradually increases in the direction from the first guide port (301) to the second guide port (302).

3. The cooling device according to claim 1, characterized in that, The support (1) is provided with the flow guide pipe (3) on both sides respectively, and the heat dissipation channel (2) has the first channel opening (201) arranged opposite to each other. The first flow guide opening (301) of each flow guide pipe (3) is connected to each first channel opening (201).

4. The cooling device according to any one of claims 1-3, characterized in that, The support (1) has an annular groove (5) on its surface facing the guide tube (3), and a sealing ring (6) is provided in the annular groove (5). The surface of the guide tube (3) facing the support (1) is in sealing contact with the sealing ring (6).

5. The cooling device according to any one of claims 1-3, characterized in that, The guide pipe (3) includes two half-pipe sections (303), which are joined together to form the guide cavity (304) of the guide pipe (3), and flanges (305) are respectively provided on the outer side walls of the two half-pipe sections (303). In this embodiment, at least one of the flanges (305) has a solder layer (7) on its surface facing the other flange (305). And / or, a first fastener (8) is connected between the two flanges (305); And / or, on the surfaces of the two half-pipe segments (303) that are close to each other, one of them is provided with a protrusion (9) and the other is provided with a recess (10) that is adapted to the protrusion (9).

6. The cooling device according to claim 5, characterized in that, At least one of the flanges (305) is provided with a connecting arm (11), which is connected to the bracket (1).

7. The cooling device according to any one of claims 1-3, characterized in that, A plurality of first arc-shaped grooves (102) are arranged on the bearing surface (101), each of the first arc-shaped grooves (102) is used to set each of the battery cells (100), and a thermally conductive adhesive layer (103) is provided on the inner wall of the first arc-shaped groove (102).

8. The cooling device according to claim 7, characterized in that, It also includes a sleeve (12), which is sleeved on the outside of the bracket (1), and the sleeve (12) cooperates with the bracket (1) to clamp the battery cell (100). The sleeve (12) is provided with a second arc-shaped groove (1201), each of the second arc-shaped grooves (1201) corresponds to each of the first arc-shaped grooves (102), and the second arc-shaped grooves (1201) are adapted to the outer surface of the battery cell (100); And / or, the sleeve (12) is provided with heat dissipation fins (1202).

9. The cooling device according to claim 8, characterized in that, The flow guide tube (3) is provided with a first temperature detection element (13); And / or, a second temperature detection element (14) is provided on the frame (12), and the detection end of the second temperature detection element (14) is used to correspond to the battery cell (100).

10. The cooling device according to any one of claims 1-3, characterized in that, The heat dissipation channel (2) is provided with a plurality of spaced support plates (202), each of which extends along the extension direction of the heat dissipation channel (2).

11. A battery pack, characterized in that, include: Battery cell (100); The cooling device according to any one of claims 1-10, wherein the battery cell (100) is disposed on the bearing surface (101) of the bracket (1).

12. The battery pack according to claim 11, characterized in that, It also includes a CCS component (200), which is disposed at the end of the cell (100) and located in the outer space of the guide tube (3), and the CCS component (200) is electrically connected to the cell (100).

Images