Monomer battery cooling structure, battery module and battery pack

Abstract

The utility model provides a kind of monomer battery cooling structure, battery module and battery package.Wherein, monomer battery cooling structure includes shell, cooling cavity for cooling medium circulation and placing monomer battery are formed in shell, the main body of monomer battery can be directly contacted with cooling medium cooling;Partition support, it is set in cooling cavity, partition support includes baffle, cooling cavity is separated into at least two layers of sub-cooling cavity by baffle, two adjacent layers of sub-cooling cavity are communicated by the communicating port on baffle, baffle is provided with the installation site for installing monomer battery;Liquid inlet and liquid outlet, it is set on the shell, the liquid inlet and the liquid outlet are communicated with two sub-cooling cavity of opposite outermost side respectively.This application passes through multiple layers of sub-cooling cavity and communicating port, cooperation turbulence structure forms multiple-path cooling channel, effectively increases the contact area and flow path of cooling medium and battery, improves battery cooling efficiency, enhances cooling uniformity.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, and in particular to a single-cell battery cooling structure, a battery module, and a battery pack. Background Technology

[0002] With the increasing popularity of electric vehicles, lithium-ion batteries are being used more and more widely as the primary power source. However, lithium-ion batteries generate a significant amount of heat during charging and discharging, leading to elevated battery temperatures and consequently affecting battery performance and lifespan. Therefore, effectively managing battery heat and ensuring its safe operation within its optimal operating temperature range has become a crucial issue in current battery pack design.

[0003] Liquid cooling systems, due to their superior thermal conductivity, are gradually becoming an effective solution to battery heat dissipation problems. They can achieve more efficient temperature control, reduce the risk of battery overheating, and improve battery energy density and lifespan. However, existing liquid cooling systems have low heat exchange rates when cooling batteries, resulting in poor cooling effects and a decline in battery performance and cycle life. This problem urgently needs to be solved. Utility Model Content

[0004] This invention provides a single-cell cooling structure, a battery module, and a battery pack to solve the technical problem of low heat exchange rate of single-cell batteries.

[0005] This utility model provides a single-cell battery cooling structure, comprising: The housing has a cooling cavity formed inside for the flow of cooling medium and for placing individual cells, and the main body of the individual cell can be directly contacted and cooled by the cooling medium. A partition bracket is disposed within the cooling chamber. The partition bracket includes a partition plate that divides the cooling chamber into at least two sub-cooling chambers. Each sub-cooling chamber is used to cool different parts of the single battery cell. Adjacent sub-cooling chambers are interconnected through a communication port on the partition plate. The partition plate is provided with mounting positions for installing the single battery cell. An inlet and an outlet are provided on the housing, and the inlet and outlet are respectively connected to the two outermost sub-cooling chambers.

[0006] In one embodiment of the present invention, the main body of the single battery includes at least a portion of the outer peripheral surface of the single battery, the main body of the single battery cooperates with the mounting position to install the single battery in the cooling cavity, and any of the sub-cooling cavities corresponds to at least a portion of the main body.

[0007] In one embodiment of this utility model, the number of layers in the sub-cooling chamber is odd, and the liquid outlet and liquid inlet are located on opposite sides of the shell, or; The number of layers in the sub-cooling chamber is even, and the liquid outlet and liquid inlet are located on the same side of the shell. In one embodiment of the present invention, the liquid outlet and the liquid inlet are located on two adjacent sides of the shell in the circumferential direction.

[0008] In one embodiment of this utility model, the liquid inlet and the communication port on the partition closest to the liquid inlet are located on opposite sides; and / or, The liquid outlet and the connecting port on the partition adjacent to the liquid outlet are located on opposite sides.

[0009] In one embodiment of the present invention, when the partition is multi-layered, in two adjacent partitions, the connecting opening on one partition is close to the first side of the housing, and the connecting opening on the other partition is close to the second side of the housing, wherein the first side and the second side are opposite sides or adjacent sides.

[0010] In one embodiment of the present invention, the partition bracket further includes a baffle plate connected to the partition plate. The baffle plate is located in each sub-cooling cavity. When a single cell is installed in the mounting position, the single cell and the baffle plate cooperate to form multiple flow paths in each sub-cooling cavity.

[0011] In one embodiment of the present invention, the side of the spoiler that contacts the individual battery is an arc-shaped structure that mates with the outer peripheral surface of the individual battery.

[0012] In one embodiment of the present invention, the spoiler and the partition are an integral structure, and at least a portion of the spoiler is supported on the bottom of the housing.

[0013] In one embodiment of this utility model, the partition bracket and the housing are an integral structure.

[0014] In one embodiment of the present invention, the housing includes a lower cover plate, the lower cover plate is provided with a positioning groove for positioning the single battery cell, the positioning groove is opened on the side of the lower cover plate near the cooling cavity, a first sealant is provided between the positioning groove and the single battery cell, the positioning groove is provided with a lower clearance hole, the lower clearance hole corresponds to the explosion-proof valve located at the first end of the single battery cell.

[0015] In one embodiment of the present invention, the housing further includes an upper cover plate, the upper cover plate having a plurality of upper clearance holes corresponding to the mounting position, the second end of the single battery cell passing through the upper clearance hole, the first end and the second end being located at opposite ends of the single battery cell, the upper cover plate having a second sealant, the second sealant being used to seal the connection between the single battery cell and the upper cover plate.

[0016] This utility model also provides a battery module, which includes a single battery cell and the above-mentioned single battery cell cooling structure, wherein the single battery cell is installed in the mounting position.

[0017] This utility model also provides a battery pack, which includes multiple battery modules as described above.

[0018] The beneficial effects of this utility model are: In this invention, by providing at least one partition inside the housing, the space inside the housing is divided into multiple separate sub-cooling chambers. The sub-cooling chambers are interconnected through a connecting port, and the liquid inlet and outlet are respectively connected to the cooling chambers at the outermost ends. Therefore, after the cooling medium is introduced into the cooling chamber, the cooling medium passes through all the sub-cooling chambers in sequence and cools various parts of the individual battery. Compared with the prior art, this invention can effectively increase the contact area between the cooling medium and the battery and increase the flow path of the cooling medium, thereby improving the uniformity of cooling of the individual battery and the heat exchange efficiency between the cooling medium and the individual battery.

[0019] (2) In this utility model, the multi-layer sub-cooling chamber can adjust the position of the liquid inlet and liquid outlet according to the different number of sub-cooling chambers, which can facilitate the installation of the single-cell cooling structure while ensuring the cooling effect of the single cell. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] In the attached diagram: Figure 1 An exploded view provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the assembly structure provided in one embodiment of the present utility model; Figure 3 This is a cross-sectional structural schematic diagram provided in one embodiment of the present invention; Figure 4 This is a cross-sectional view provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of an embodiment of the present invention when the number of sub-cooling chambers is odd; Figure 6 This is a schematic diagram of an embodiment of the present invention when the number of sub-cooling chambers is even; Figure 7This is a half-sectional view of the shell provided in one embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the partition bracket provided in one embodiment of the present invention; Figure 9 This is a schematic diagram of the flow path provided in one embodiment of the present invention; Figure 10 This is another schematic diagram of the liquid inlet and liquid outlet provided in one embodiment of the present invention; Figure 11 This is another schematic diagram of the liquid inlet and liquid outlet provided in one embodiment of the present utility model; Figure 12 This is another schematic diagram of the housing provided in one embodiment of the present invention.

[0022] The attached figures are labeled as follows: 1. Housing, 101. Cooling chamber, 102. Sub-cooling chamber, 103. Upper cover plate, 1031. Lower cover plate, 104. Positioning groove, 1041. Lower clearance hole, 1042. Separator bracket, 2. Partition plate, 201. Mounting position, 202. Baffle plate, 203. Connecting port, 204. Liquid inlet, 3. Liquid outlet, 4. Liquid inlet pipe, 5. Liquid outlet pipe, 6. First sealant, 7. Second sealant, 8. Single cell, 9. Main body, 901. Flow path, 10. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0026] Currently, the cooling of individual cells 9, especially the cooling of individual cells 9 by liquid cooling, mainly involves placing the main body 901 of individual cells 9 in a sealed space and then applying a flowing cooling medium to the sealed space to exchange heat with the individual cells 9; or by setting up cold plates between individual cells 9 and setting up cooling channels on the cold plates to remove the heat from the individual cells 9.

[0027] However, the method of setting up a cold plate to indirectly cool the individual cells 9 cannot achieve efficient heat transfer. Liquid cooling equipment has limited contact area between the cooling medium and the individual cells 9, and there may be dead corners in the flow of the cooling medium, which leads to uneven cooling of the individual cells 9, resulting in a decrease in the performance and cycle life of the individual cells 9.

[0028] Please see Figures 1-12 Based on the above problems, this application provides a single-cell cooling structure, a battery module, and a battery pack.

[0029] Please see Figures 1-11 In an exemplary embodiment, the cooling structure of the single cell 9 includes a housing 1, and a cooling cavity 101 is formed inside the housing 1 for the flow of cooling medium and for placing the single cell 9. When the single cell 9 is located inside the cooling cavity 101, the cooling medium inside the cooling cavity 101 can directly contact the outer wall of the single cell 9 for cooling. A partition support 2 is provided inside the cooling cavity 101. The partition support 2 includes a partition 201, which divides the cooling cavity 101 into at least two sub-cooling cavities 102. Adjacent sub-cooling cavities 102 are interconnected through a communication port 204 provided on the partition. The partition 201 is provided with a mounting position 202 for mounting the single cell 9.

[0030] The housing 1 is provided with a liquid inlet 3 and a liquid outlet 4, which are respectively connected to the two outermost sub-cooling chambers 102. In a specific embodiment, the liquid inlet 3 is connected to the uppermost sub-cooling chamber 102, and the liquid outlet 4 is connected to the lowermost sub-cooling chamber; or, the liquid inlet 3 is connected to the first layer sub-cooling chamber 102, and the liquid outlet 4 is connected to the last layer sub-cooling chamber.

[0031] In this embodiment, by setting up a multi-layered sub-cooling cavity 102, the flow path 10 of the cooling medium can be effectively extended, the contact area and contact time between the cooling medium and the single cell 9 can be increased, and the heat exchange rate can be improved. The multi-layered sub-cooling cavity 102 structure can also arbitrarily set the positions of the liquid inlet 3 and the liquid outlet 4 while ensuring the cooling effect of the single cell 9, so as to facilitate the installation of the cooling structure of the single cell 9.

[0032] For example, in this embodiment, the partition 201 can be a flat plate structure or an irregularly shaped structure with flow channels, wherein the flow channels can optimize the flow path of the cooling medium. The shape of the connecting port 204 can be circular, square, or other geometric shapes; in this embodiment, it is preferably circular, and its size is determined according to the flow rate requirements of the cooling medium.

[0033] For example, the mounting position 202 is a mounting hole provided on the partition 201. The size of the mounting hole is adapted to the outer contour of the single cell 9. The number of mounting positions 202 is the same as the number of single cells 9, so as to facilitate the installation of single cells 9.

[0034] For example, in this embodiment, the sub-cooling chambers 102 are arranged at intervals from top to bottom, and the sub-cooling chambers 102 are separated by partitions 201. The liquid inlet 3 is located in the uppermost sub-cooling chamber 102, and the liquid outlet 4 is located in the lowermost sub-cooling chamber 102. When the cooling medium is introduced into the upper sub-cooling chamber 102, the cooling medium flows to the lower sub-cooling chamber 102 under the action of gravity. Therefore, the input power of the cooling medium can be reduced, energy consumption can be reduced, and energy can be saved.

[0035] It is worth noting that in this embodiment, the liquid inlet 3 and liquid outlet 4 are arranged in a manner that includes distribution on opposite sides, distribution on the same side, or distribution on adjacent sides, and the specific selection depends on the number of layers of the sub-cooling chamber 102.

[0036] It should also be noted that the outer contour of the shell 1 is a square structure or a cylindrical structure, preferably a square structure.

[0037] Please see Figure 1 and Figure 2 In this embodiment, the cooling of the single battery cell 9 mainly targets the heat-generating parts of the main body 901 of the single battery cell 9. Therefore, during specific installation, the main heat-generating parts of the single battery cell 9 are installed inside the cooling cavity 101, so that the main body 901 is arranged through multiple sub-cooling cavities 102, thereby enabling multiple sub-cooling cavities 102 to cool different parts of the main body 901. In a specific embodiment, the single battery cell 9 is a cylindrical battery, and the main body 901 is the axially extending outer peripheral surface of the cylindrical battery. During installation, part or all of the outer peripheral surface is installed at the mounting position 202 to achieve cooling.

[0038] It is worth noting that in this embodiment, the number of sub-cooling chambers 102 is adaptively set according to the length of the main body 901. In order to ensure the cooling effect, the intervals between the sub-cooling chambers 102 are equal, so as to achieve uniform cooling of the main body 901.

[0039] Please see Figures 1-11In an exemplary embodiment, the liquid outlet 4 and liquid inlet 3 are preferably arranged in the following ways: the sub-cooling chamber 102 has an odd number of layers, and the liquid outlet 4 and liquid inlet 3 are located on opposite sides of the housing 1; or, the sub-cooling chamber 102 has an even number of layers, and the liquid outlet 4 and liquid inlet 3 are located on the same side of the housing 1; or, the liquid outlet 4 and liquid inlet 3 are located on two adjacent sides of the housing 1 in the circumferential direction.

[0040] In this embodiment, by setting an odd number of sub-cooling chambers 102 and arranging the inlets and outlets on opposite sides, the cooling medium must pass through all sub-cooling chambers 102 during its flow. Specifically, when the cooling medium enters from the inlet 3, due to the odd number of layers and the opposite positions of the inlets and outlets, the medium is forced to alternately change its flow direction between adjacent sub-cooling chambers 102, forming a continuous "S"-shaped flow path. The flow path of the cooling medium effectively avoids the generation of flow dead zones, ensuring that the cooling medium is in full contact with the individual battery cells 9 in each sub-cooling chamber 102. At the same time, the pressure difference formed by the inlets and outlets on opposite sides can drive the cooling medium to flow uniformly, improving heat exchange efficiency. Furthermore, by optimizing the flow path design, this embodiment can achieve a more uniform cooling effect under the same pump power conditions, thereby improving the temperature control capability of the individual battery cells 9.

[0041] For example, such as Figure 5 As shown, the odd-numbered sub-cooling chamber 102 refers to a sub-cooling chamber 102 structure with an odd number of layers, such as three, five, or seven. Preferably, in this embodiment, when a three-layer sub-cooling chamber 102 structure is used, the cooling medium enters the uppermost first-layer sub-cooling chamber 102 from the liquid inlet 3 on the left side of the shell 1, flows into the second-layer sub-cooling chamber 102 through the connecting port 204, and then flows into the bottom third-layer sub-cooling chamber 102 through the connecting port 204 before exiting from the liquid outlet 4 on the right side of the shell 1. Furthermore, the cooling principle of other odd-numbered sub-cooling chambers 102 is the same as that of the three-layer sub-cooling chamber 102 structure described above.

[0042] For example, such as Figure 6 As shown, when an even number of sub-cooling chambers 102 are used, the cooling medium enters from the inlet 3 on the same side and flows through each sub-cooling chamber 102 in sequence under the guidance of the staggered connecting ports 204, and finally flows out from the outlet 4 on the same side. This also achieves the serpentine flow of the cooling medium. The inlet 3 and outlet 4 are arranged along the height direction of the shell 1 and are connected to the uppermost sub-cooling chamber 102 and the lowermost sub-cooling chamber 102, respectively.

[0043] For example, when the housing 1 adopts a square structure, the liquid inlet 3 and the liquid outlet 4 can be located on adjacent sides of the housing 1 (with an included angle of 90°). When the housing 1 adopts a cylindrical shape, the arrangement of the liquid inlet 3 and the liquid outlet 4 has greater freedom. For example, the liquid inlet 3 and the liquid outlet 4 can be arranged at 120 degrees or at 60 degrees. As a preferred embodiment, the circumferential angle between the liquid inlet 3 and the liquid outlet 4 is 90 degrees, which enables the cooling medium to form a uniform spiral flow path in the multi-layer sub-cooling chamber 102.

[0044] It is worth noting that in this embodiment, the number of sub-cooling chambers 102 is designed according to the length of the single cell 9. The number of sub-cooling chambers 102 increases with the increase of the length of the single cell 9 to ensure the cooling effect.

[0045] It should also be noted that in this embodiment, the structure of the liquid inlet 3 adopts a hole opened on the side wall of the housing 1, which is connected to the liquid inlet pipe 5 provided on the housing 1. The connection is sealed. The liquid inlet pipe 5 can be used to input cooling medium into the liquid inlet 3. Similarly, the liquid outlet 4 is also provided on the side wall of the housing 1, which is connected to the liquid outlet pipe 6 provided on the housing 1. The connection is sealed. The cooling medium in the cooling chamber 101 can flow out from the liquid outlet pipe 6 through the liquid outlet 4 for recycling and circulation.

[0046] It should also be noted that when setting the liquid inlet 3 and the liquid outlet 4, by setting the liquid inlet 3 on the opposite side of the connecting port 204 on the partition 201 adjacent to the liquid inlet 3, the cooling medium will pass through the entire sub-cooling chamber 102 after entering the sub-cooling chamber 102 from the liquid inlet 3. At the same time, by setting the liquid outlet 4 on the opposite side of the connecting port 204 on the partition 201 adjacent to the liquid outlet 4, the cooling medium will also flow through the entire sub-cooling chamber 102 when entering the bottom sub-cooling chamber 102 from the upper sub-cooling chamber 102, thus forming a complete and continuous "S" shaped flow path to achieve sufficient and uniform cooling of each part of the main body 901 of the single cell 9.

[0047] In an exemplary embodiment, a connection port 204 is disposed on a partition 201. In two adjacent partitions 201, the connection port 204 on one partition 201 is close to the first side of the housing 1, and the connection port 204 on the other partition 201 is close to the second side of the housing 1. The first side and the second side are opposite sides or adjacent sides. Specifically, the connection port 204 of one partition 201 is located on the left side of the partition 201, and the connection port 204 of the adjacent partition 201 is located on the right side of the partition 201; or, the connection port 204 of one partition 201 is located at the front of the partition 201, and the connection port 204 of the adjacent partition 201 is located at the rear of the partition 201; or, the connection port 204 of one partition 201 is located at the left side of the partition 201, and the connection port 204 of the adjacent partition 201 is located at the front or right side.

[0048] In this embodiment, a three-dimensional meandering flow network is constructed in the multi-layer sub-cooling chamber 102 by alternately arranging the positions of the connecting ports 204. Specifically, after the cooling medium enters from the inlet 3, its flow direction is forced to change between adjacent sub-cooling chambers 102, thereby extending the effective flow distance of the medium within the chamber. After the cooling medium enters the next layer of sub-cooling chamber 102 through the left connecting port 204 of the upper partition 201, it needs to flow to the right side before it can continue to be transferred through the connecting port 204 of the lower partition 201. This asymmetrical arrangement forms a self-guided flow, which increases the contact time between the cooling medium and the battery, effectively avoiding interlayer short-circuit flow phenomena, improving the heat exchange uniformity of the individual battery 9, and eliminating the need for additional power devices.

[0049] For example, the connection port 204 can be configured as a tapered structure to increase the flow rate.

[0050] For example, in this embodiment, the connecting port 204 on a single partition 201 is set to one or more. When there are multiple connecting ports 204, the flow rate of the cooling medium can be increased and the heat exchange effect can be improved.

[0051] Please see Figure 7 and Figure 8In one exemplary embodiment, the partition bracket 2 further includes a baffle plate 203, which is disposed between the mounting position 202 and the inner wall of the housing 1, or between two mounting positions 202. The baffle plate 203 is located in each sub-cooling cavity 102. When a single battery cell 9 is installed in the mounting position 202, the single battery cell 9 and the baffle plate 203 form a baffle structure, which creates multiple flow paths 10 within each sub-cooling cavity 102. In a specific embodiment, the baffle plate 203 is arranged perpendicularly to the partition plate 201 or at a certain angle to adapt to different types of single batteries 9 or to form flow paths 10 with different flow directions. In a specific embodiment, the baffle plate 203 is arranged perpendicularly to the partition plate 201, and the baffle plate 203 extends vertically into each sub-cooling cavity 102 until both ends of the baffle plate 203 abut against the upper cover plate 103 and the lower cover plate 104 of the housing 1, respectively.

[0052] In this embodiment, the flow state of the cooling medium is altered by the cooperation between the baffle 203 and the individual battery 9. Specifically, the linearly flowing cooling medium generates turbulence when passing through the baffle structure, thereby increasing the contact time and contact area between the cooling medium and the battery surface. The formation of multiple flow paths 10 makes the cooling medium distribution more uniform, avoiding local overheating. At the same time, the flow paths 10 altered by the baffle structure can cool each individual battery 9 from all directions. In this embodiment, the baffle 203 has a simple structure, and without increasing the system complexity, the heat exchange efficiency is significantly improved by optimizing the cooling medium flow path design.

[0053] For example, the spoiler 203 can achieve its function using various structural forms. Specifically, the connection method between the spoiler 203 and the baffle 201 includes, but is not limited to, welding, bolting, or integral molding. As a preferred embodiment, the spoiler 203 and the baffle 201 are integrally molded using an injection molding process, thereby ensuring structural strength and thermal conductivity.

[0054] For example, the arrangement of the baffles 203 in the sub-cooling cavity 102 can be symmetrical or asymmetrical, with asymmetrical distribution being more conducive to generating turbulence. For instance, the baffles 203 can be designed as a wave-shaped, sawtooth-shaped, or flat plate structure with guide holes or columnar shape, located between the two baffles 201.

[0055] For example, the side of the spoiler 203 that contacts the individual battery 9 is an arc-shaped structure that mates with the outer peripheral surface of the individual battery 9. Setting the side of the spoiler 203 that mates with the individual battery 9 to be arc-shaped allows the spoiler 203 to fit better with the individual battery 9, and makes the flow path 10 of the cooling medium more stable.

[0056] For example, the spoiler 203 and the baffle 201 are an integral structure, and at least part of the spoiler 203 is supported at the bottom of the shell 1. The integrated structural design solves the problems of assembly accuracy and structural strength. The integral molding eliminates the cumulative tolerances of traditional split-type installations, ensuring the relative positional accuracy of the spoiler 203 and the baffle 201; the bottom support design forms a mechanical transmission path, directly transmitting the fluid impact force to the shell 1, preventing the baffle 201 from deforming under independent stress. Preferably, in this embodiment, the spoiler 203 and the baffle 201 are integrally molded by injection molding or 3D printing. In a specific embodiment, the supporting spoiler 203 is mainly located at the corners of the baffle 201, providing stable support for the baffle 201 and strengthening the overall strength of the shell 1. Preferably, the supporting spoiler 203 is located at two opposite corners of the baffle 201.

[0057] It is worth noting that since there are multiple sub-cooling chambers 102 from top to bottom, the baffle 203 is installed through all the sub-cooling chambers 102 to support all the baffles 201 and strengthen the structural strength.

[0058] Please see Figure 3 and Figure 7 In one exemplary embodiment, the partition bracket 2 and the housing 1 are an integral structure. Specifically, by eliminating the assembly seams of the traditional split structure, the sealing performance of the cooling chamber 101 is directly enhanced. Under fluid pressure, the integral structure avoids the risk of media leakage caused by aging of connecting parts or assembly errors. At the same time, the mechanical strength of the overall structure is improved, effectively resisting the vibration stress generated by the flow of cooling media. Therefore, the integrated structure eliminates connecting parts such as sealing rings, which not only simplifies the assembly process but also eliminates the potential for leakage due to seal failure at the source. The resulting improvement in sealing performance and enhanced structural stability directly solves the problems of leakage and structural loosening in the long-term operation of the cooling system.

[0059] For example, in this embodiment, the housing 1 and the partition bracket 2 are integrally formed by 3D printing.

[0060] For example, in this embodiment, the shell 1 and the separator bracket 2 are made of corrosion-resistant and high-temperature-resistant non-metallic materials, including but not limited to ABS (acrylonitrile-butadiene-styrene copolymer), PA (polyamide, nylon), PE (polyethylene), PP (polypropylene), PS (polystyrene), PMMA (polymethyl methacrylate, plexiglass), PVC (polyvinyl chloride), polycarbonate, polyurethane, phenolic resin, polystyrene, synthetic rubber, and special engineering plastics such as polyimide, polyphenylene sulfide, and polysulfone. This can, to a certain extent, prevent the shell 1 from heating up and causing the overall temperature of the shell 1 to rise, thereby improving the heat exchange efficiency and enhancing the cooling effect on the single battery cell 9. The shell 1 and separator bracket 2 made of the above-mentioned non-metallic materials can also effectively reduce the overall weight of this invention and improve the lightweight performance of the cooling structure of the single battery cell 9.

[0061] Please see Figures 1-7 In one exemplary embodiment, the upper end of the square housing 1 is open, and the cooling chambers 102 in the housing 1 are spaced apart from top to bottom. An upper cover plate 103 and a lower cover plate 104, as well as a first sealant 7 and a second sealant 8, are respectively provided on the upper and lower parts of the housing 1 to isolate the cooling chambers 101 from the external environment. In a specific embodiment, the lower cover plate 104 is located at the bottom of the housing 1, and the upper cover plate 103 is located at the top of the housing 1. Multiple positioning grooves 1041 are formed on the inner side of the lower cover plate 104. The number and position of the positioning grooves 1041 correspond to the mounting positions 202. The positioning grooves 1041 are mainly used for the initial positioning and fixing of the individual battery cells 9. The size of the positioning grooves 1041 is equal to or slightly larger than the outer contour of the individual battery cells 9. In this embodiment, the positioning grooves 1041 are circular. A first sealant 7 is provided between the positioning groove 1041 and the individual battery 9. The first sealant 7 has a ring structure and is fixed to the bottom surface of the positioning groove 1041. The first sealant 7 is located between the bottom of the individual battery 9 and the positioning groove 1041 to achieve a seal between the individual battery 9 and the lower cover plate 104. The positioning groove 1041 has a lower clearance hole 1042, which is a through hole and is corresponding to the explosion-proof valve located at the first end of the individual battery 9. The clearance hole is mainly used to facilitate the smooth opening of the explosion-proof valve at the first end of the individual battery 9 in the event of thermal runaway, thereby improving the safety performance of the battery. After the first sealant 7 has cured, it seals the gap between the individual battery 9 and the positioning groove 1041, while the explosion-proof valve of the individual battery 9 is exposed through the lower clearance hole 1042. Specifically, in this embodiment, the first sealant 7 is first applied to the groove of the positioning groove 1041, and then the single battery 9 is vertically inserted into the corresponding mounting position on the partition from the top of the shell, and the single battery is pressed on the first sealant 7. The first sealant 7 is then cured to achieve a seal between the single battery 9 and the lower cover plate 104, so as to prevent the cooling medium from leaking from the lower cover plate 104.

[0062] In an exemplary embodiment, the upper cover plate 103 has multiple upper clearance holes 1031 corresponding to the mounting positions 202, allowing the tabs located at the second end of the single cell 9 to extend out of the cooling cavity. The upper cover plate 103 of the housing 1 is provided with a second sealant 8. The second sealant 8 can seal the single cell 9 and the upper cover plate 103, preventing the cooling medium in the cooling cavity 101 from flowing out from above. After the first end of the single cell 9 is installed, its second end protrudes through the upper clearance hole 1031. The upper surface of the upper cover plate 103 is coated with sealant to form the second sealant 8, making the second sealant 8 a plate-shaped sealing structure with multiple pores. After the sealant cures, the seal between the single cell 9 and the upper cover plate 103 is achieved. The first end and the second end are located at opposite ends of the single cell 9, and the first end and the second end protrude through the lower cover plate 104 and the upper cover plate 103, respectively, to realize the function of the single cell 9.

[0063] In this embodiment, the sealing between the single cell 9 and the casing 1 can be achieved by setting a sealing structure on the upper and lower cover plates. At the same time, the synergistic effect of the upper and lower seals reduces the assembly precision requirements and helps to improve the assembly performance of the device.

[0064] For example, the first sealant 7 and the second sealant 8 may be made of materials such as silicone, polyurethane or epoxy resin, and formed on the lower cover plate 104 and the upper cover plate 103 by coating or injection molding processes.

[0065] This utility model also proposes a battery module, which includes multiple individual battery cells 9 and the aforementioned individual battery cell cooling structure, with the multiple individual battery cells 9 installed at the mounting position 202.

[0066] This utility model also proposes a battery pack that includes multiple of the above-mentioned battery modules.

[0067] In summary, this application, through the arrangement of multi-layer sub-cooling chambers 102 and connecting ports 204, and in conjunction with the turbulence structure, forms a multi-path cooling channel, which effectively increases the contact area and flow path between the cooling medium and the battery, improves the battery cooling efficiency, and enhances the cooling uniformity of the individual cells 9.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A single-cell battery cooling structure, characterized in that, include: The housing has a cooling cavity formed inside for the flow of cooling medium and for placing individual cells, and the main body of the individual cell can be directly contacted and cooled by the cooling medium. A partition bracket is disposed within the cooling chamber. The partition bracket includes a partition plate that divides the cooling chamber into at least two sub-cooling chambers. Each sub-cooling chamber is used to cool different parts of the single battery cell. Adjacent sub-cooling chambers are interconnected through a communication port on the partition plate. The partition plate is provided with mounting positions for installing the single battery cell. An inlet and an outlet are provided on the housing, and the inlet and outlet are respectively connected to the two outermost sub-cooling chambers.

2. The single-cell cooling structure according to claim 1, characterized in that: The main body of the single cell includes at least a portion of the outer peripheral surface of the single cell. The main body of the single cell mates with the mounting position to mount the single cell in the cooling cavity. Each of the sub-cooling cavities corresponds to at least a portion of the main body.

3. The single-cell cooling structure according to claim 1, characterized in that: The number of layers in the sub-cooling chamber is odd, and the liquid outlet and liquid inlet are located on opposite sides of the shell, or; The number of layers in the sub-cooling chamber is even, and the liquid outlet and liquid inlet are located on the same side of the shell.

4. The single-cell cooling structure according to claim 1, characterized in that: The liquid outlet and liquid inlet are located on two adjacent sides of the shell in the circumferential direction.

5. The single-cell cooling structure according to claim 1, characterized in that: The inlet and the connecting port on the partition closest to the inlet are located on opposite sides; and / or, The liquid outlet and the connecting port on the partition adjacent to the liquid outlet are located on opposite sides.

6. The single-cell cooling structure according to claim 1, characterized in that: When the partition is multi-layered, in two adjacent partitions, the connecting opening on one partition is close to the first side of the shell, and the connecting opening on the other partition is close to the second side of the shell. The first side and the second side are opposite sides or adjacent sides.

7. The single-cell cooling structure according to claim 1, characterized in that: The partition bracket also includes a baffle plate connected to the partition. The baffle plate is located in each sub-cooling cavity. When a single cell is installed in the mounting position, the single cell and the baffle plate cooperate to form multiple flow paths in each sub-cooling cavity.

8. The single-cell cooling structure according to claim 7, characterized in that: The side of the spoiler that contacts the individual battery cell has an arc-shaped structure that mates with the outer circumferential surface of the individual battery cell.

9. The single-cell cooling structure according to claim 7, characterized in that: The spoiler and the partition are an integral structure, and at least part of the spoiler is supported on the bottom of the housing.

10. The single-cell cooling structure according to claim 1, characterized in that: The partition bracket and the housing are an integral structure.

11. The single-cell cooling structure according to claim 2, characterized in that: The housing includes a lower cover plate, which has a positioning groove for positioning the individual battery. The positioning groove is located on the side of the lower cover plate near the cooling cavity. A first sealant is provided between the positioning groove and the individual battery. The positioning groove has a lower clearance hole, which corresponds to the explosion-proof valve located at the first end of the individual battery.

12. The single-cell cooling structure according to claim 11, characterized in that: The housing also includes an upper cover plate, which has a plurality of upper clearance holes corresponding to the mounting positions. The second end of the single battery cell is disposed through the upper clearance hole. The first end and the second end are respectively located at opposite ends of the single battery cell. The upper cover plate is provided with a second sealant, which is used to seal the connection between the single battery cell and the upper cover plate.

13. A battery module, characterized in that: It includes a single battery cell and a single battery cell cooling structure as described in any one of claims 1-12, wherein the single battery cell is mounted at the mounting position.

14. A battery pack, characterized in that: It includes multiple battery modules as described in claim 13.

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