Cooler for battery pack, battery pack, and electric device

Abstract

This utility model discloses a cooler for a battery pack, a battery pack, and an electrical device. The cooler for the battery pack includes a housing with a first dimension L and a second dimension W. The first and second directions are perpendicular, and L and W satisfy the following relationships: 10mm ≤ L ≤ 50mm and 10mm ≤ W ≤ 50mm, respectively. Therefore, the cooler can be flexibly arranged at the location on the battery pack requiring cooling, thus avoiding the need to place the cooler in a fixed position on the top of the battery pack or the side of the battery cells.

Description

Technical Field

[0001] This utility model relates to the field of electrical device technology, and in particular to a battery pack cooler, a battery pack, and an electrical device. Background Technology

[0002] In the existing technology, the method of battery temperature control is to use a cooler to control the temperature of the battery pack. However, the cooler is generally installed in a relatively fixed position such as the top of the battery pack or the side of the cell, and cannot be installed in other areas of the battery pack that are heated, which reduces the cooling efficiency of the battery pack. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack cooler that can be flexibly arranged at the location of the battery pack that requires cooling, thereby avoiding the need for the cooler to be placed in a relatively fixed position on the top of the battery pack or the side of the battery cells.

[0004] This utility model further proposes a battery pack; This utility model further proposes an electrical device.

[0005] A battery pack cooler according to a first aspect of the present invention includes: a housing, the housing having a first direction dimension of L and a second direction dimension of W, the first direction and the second direction being perpendicular, and L and W satisfying the following relationships: 10mm≤L≤50mm, 10mm≤W≤50mm.

[0006] Therefore, the cooler can be flexibly placed at the location of the battery pack that needs cooling, thus avoiding the need for the cooler to be placed in a relatively fixed position on the top of the battery pack or the side of the cell.

[0007] According to some embodiments of the present invention, the housing includes: a main housing portion having a cooling channel formed thereon; and a connector disposed at one end of the main housing portion in a first direction, the connector communicating with the cooling channel; wherein, the dimension of the housing in the first direction is the sum of the dimension of the main housing portion in the first direction and the dimension of the connector in the first direction, and the dimension of the housing in the second direction is the dimension of the main housing portion in the second direction.

[0008] According to some embodiments of the present invention, the connector is provided with a barbed groove that extends along the first direction.

[0009] According to some embodiments of this utility model, the slot has a top diameter and a bottom diameter, the top diameter is D1, the bottom diameter is D2, and the angle formed by the slot and the axial direction of the connector is α. The relationship between D1, D2 and α is: 3.1mm≤D1≤4.1mm, 2.5mm≤D2≤3.5mm, 13°≤α≤19°.

[0010] According to some embodiments of the present invention, the cooler further includes: a connecting pipe, one end of which is sleeved on the joint and cooperates with the slot, and the other end of which is connected to the cooling system.

[0011] According to some embodiments of this utility model, the inner diameter of the connecting pipe is D3, the wall thickness of the connecting pipe is t1, and the relationship between D3 and t1 is: 2.8mm≤D3≤3.1mm, 0.4mm≤t1≤0.6mm.

[0012] According to some embodiments of this utility model, the housing is an insulating housing.

[0013] According to some embodiments of the present invention, the housing includes: a top shell; a bottom shell, wherein the third direction of the housing is perpendicular to the first direction and the second direction respectively, and the bottom shell is connected to the bottom of the top shell.

[0014] According to some embodiments of this utility model, the top shell and the bottom shell are bonded together.

[0015] According to some embodiments of the present invention, a cooling channel and a heat exchange chamber are formed inside the housing. The cooling channel and the heat exchange chamber are independently separated from each other. The cooling channel forms an independent first space inside the housing, and the heat exchange chamber forms an independent second space inside the housing. The first space and the second space are not connected to each other. The heat exchange chamber is at least partially filled with a heat exchange medium.

[0016] According to some embodiments of the present invention, the cooling channel has at least one bend in its extending direction, the cooling channel has a first heat exchange sidewall and a second heat exchange sidewall, the first heat exchange sidewall and the second heat exchange sidewall are spaced apart and define a first space between them; the first space divides the second space into a first side space and a second side space on the housing, the first side space is disposed close to the first heat exchange sidewall and located on the side of the first heat exchange sidewall facing away from the first space, and the second side space is disposed close to the second heat exchange sidewall and located on the side of the second heat exchange sidewall facing away from the first space.

[0017] According to some embodiments of this utility model, the heat exchange medium is one of phase change material, water, methanol, and acetone.

[0018] According to some embodiments of the present invention, the portion of the top shell corresponding to the heat exchange chamber is provided with a medium injection port.

[0019] According to some embodiments of the present invention, the housing is provided with a partition rib protruding along a third direction of the housing between the cooling channel and the heat exchange chamber, the third direction being perpendicular to the first direction and the second direction respectively.

[0020] According to some embodiments of the present invention, the dimension of the cooling channel in the third direction is H1, the third direction is perpendicular to the first direction and the second direction respectively, and the wall thickness of the cooling channel is t2. H1 and t2 satisfy the following relationship: 1mm≤H1≤4mm, 0.2mm≤t2≤0.5mm.

[0021] According to some embodiments of the present invention, the third dimension of the housing is H2, which is perpendicular to the first direction and the second direction respectively, and H2 satisfies the relationship: 2mm≤H2≤5mm.

[0022] According to some embodiments of the present invention, the surface of the bottom shell facing away from the top shell along a third direction is a plane, and the third direction is perpendicular to the first direction and the second direction, respectively.

[0023] A battery pack according to a second aspect of the present invention includes: a cooler for the battery pack, wherein the cooler is bonded to the battery pack.

[0024] The electrical device according to a third aspect of the present invention includes: the battery pack described above.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the cooler according to an embodiment of the present invention, showing the separation of the shell and the connecting pipe; Figure 2 This is a schematic diagram of the shell structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the top shell and bottom shell separated according to an embodiment of the present utility model.

[0027] Figure label: 100. Cooler; 1. Shell; 11. Main shell section; 12. Top shell; 13. Bottom shell; 14. Connector; 141. Slot; 2. Connecting pipe; 21. Inlet connecting pipe; 22. Outlet connecting pipe; 3. Cooling channels; 4. Heat exchange chamber; 5. Medium injection port; 6. Separating rib; 7. First heat exchange sidewall; 8. Second heat exchange sidewall. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0029] The following is for reference. Figures 1-3 A cooler 100 for a battery pack according to an embodiment of the present invention is described.

[0030] Reference Figures 1-3 As shown, the battery pack cooler 100 of the first aspect embodiment of the present invention includes: a housing 1, the first direction dimension of the housing 1 is L, the second direction dimension of the housing 1 is W, the first direction and the second direction are perpendicular, and L and W respectively satisfy the relationship: 10mm≤L≤50mm, 10mm≤W≤50mm.

[0031] Specifically, the first direction can be the length direction of the housing 1, and correspondingly, the first direction can be the length direction of the battery pack. The first direction dimension of the housing 1 is set to be no less than 10mm. If the first direction dimension of the housing 1 is less than 10mm, such as 9.9mm, 9.8mm, 9.6mm, or 9.4mm (not limited to these), the contact area between the cooler 100 and the area of ​​the battery pack that needs cooling will be small along its length. This will prevent the heat from the battery pack from being effectively transferred to the cooler 100, thus reducing the cooling effect on the battery pack and failing to improve cooling efficiency. Therefore, the first direction dimension of the housing 1 cannot be less than 10mm.

[0032] Furthermore, the first-direction dimension of the housing 1 should not exceed 50mm. If the first-direction dimension of the housing 1 is greater than 50mm, such as 50.1mm, 50.2mm, 50.3mm, or 50.4mm (or similar dimensions), it will occupy a large portion of the battery pack's first-direction dimension. This would restrict the installation position of the housing 1 within the battery pack and could easily cause interference with other components. Moreover, a longer housing 1 would create a longer cooling channel 3 within the housing 1, resulting in greater resistance to the cooling medium flow and a decrease in its flow rate, thus reducing cooling efficiency. Therefore, the first-direction dimension of the housing 1 should not exceed 50mm.

[0033] When the first dimension of the housing 1 is 10mm, the cooler 100 can be placed at any position in the first direction of the battery pack, and its position is unrestricted. Furthermore, the smaller size of the housing 1 in the first direction reduces the space occupied by the housing 1 in the first direction of the battery pack and avoids interference with other components, allowing the cooler 100 to be flexibly arranged in the overheated area of ​​the battery pack in the first direction. Moreover, the smaller size of the housing 1 in the first direction results in a shorter cooling channel 3 within the housing 1, which reduces the resistance to the flow of the cooling medium and increases its flow rate, thereby improving its cooling efficiency.

[0034] Furthermore, as the first direction dimension of the housing 1 gradually increases, when the first direction dimension of the housing 1 is 50mm, the cooler 100 can be arranged at any position in the first direction of the battery pack. If the first direction dimension of the housing 1 is greater than 50mm, the cooler 100 is prone to interfere with other components and cannot be installed in the place where the battery pack needs to be cooled.

[0035] Furthermore, the dimensions of the housing 1 in the first direction can be 49.8mm, 49.7mm, 49.6mm, or 49.5mm, etc., and are not limited to these. In this way, the dimensions of the housing 1 in the first direction are relatively small, which allows the cooler 100 to be flexibly arranged in the first direction of the battery pack, and can also occupy a small space in the first direction of the battery pack. This avoids the situation where the dimensions of the housing 1 in the first direction are too large, making it inconvenient to install the cooler 100 in the position of the battery pack that needs to be cooled.

[0036] Furthermore, the second direction can be the width direction of the housing 1, and correspondingly, the second direction can be the width direction of the battery pack. The second direction dimension of the housing 1 is set to be no less than 10mm. If the second direction dimension of the housing 1 is less than 10mm, such as 9.9mm, 9.8mm, 9.7mm, or 9.6mm (not limited to these dimensions), the contact area between the cooler 100 and the area of ​​the battery pack that needs cooling will be small in its width direction. This will prevent the heat from the battery pack from being effectively transferred to the cooler 100, thus reducing the cooling effect on the battery pack and failing to improve cooling efficiency. Therefore, the width of the housing 1 cannot be less than 10mm.

[0037] Furthermore, the second dimension of the housing 1 should not exceed 50mm. If the second dimension of the housing 1 is greater than 50mm, such as 50.1mm, 50.2mm, 50.3mm, or 50.4mm (or similar dimensions), it will occupy a large amount of space in the width direction of the battery pack. This would restrict the installation position of the housing 1 in the width direction of the battery pack and could easily cause interference with other components. Moreover, a wider housing 1 would create a longer cooling channel 3 within the housing 1, resulting in greater resistance to the flow of the cooling medium and a decrease in its flow rate, thus reducing cooling efficiency. Therefore, the second dimension of the housing 1 should not exceed 50mm.

[0038] When the second dimension of the housing 1 is 10mm, the cooler 100 can be placed at any position in the second direction of the battery pack, and its position is unrestricted. Furthermore, the smaller size of the housing 1 in the second direction reduces the space occupied by the cooler 100 in that direction and avoids interference with other components, allowing for flexible placement of the cooler 100 in the overheated area of ​​the battery pack. Moreover, the smaller size of the housing 1 in the second direction results in a shorter cooling channel 3 within the housing 1, reducing resistance to the flow of the cooling medium and increasing its flow rate, thereby improving cooling efficiency.

[0039] Furthermore, as the second dimension of the housing 1 gradually increases, when the second dimension of the housing 1 is 50mm, the cooler 100 can be arranged at any position in the second direction of the battery pack. If the second dimension of the housing 1 is greater than 50mm, the cooler 100 may interfere with other components and cannot be installed in the place where the battery pack needs to be cooled.

[0040] Furthermore, the second dimension of the housing 1 can be set to 49.5mm, 49.6mm, 49.7mm or 49.8mm, etc., and is not limited to this. In this way, the second dimension of the housing 1 is smaller, which allows the cooler 100 to be flexibly arranged in the second direction of the battery pack, and can also occupy a smaller space in the second direction of the battery pack. This avoids the situation where the second dimension of the housing 1 is too large, making it inconvenient to install the cooler 100 in the position of the battery pack that needs to be cooled.

[0041] Therefore, the cooler 100 can be flexibly arranged at the location of the battery pack that needs cooling, thus avoiding the need for the cooler 100 to be set in a relatively fixed position on the top of the battery pack or the side of the battery cell.

[0042] According to some embodiments of this utility model, such as Figure 1As shown, the housing 1 includes a main housing portion 11 and a connector 14. The main housing portion 11 forms a cooling channel 3. The connector 14 is disposed at one end of the main housing portion 11 in a first direction and communicates with the cooling channel 3. The dimension of the housing 1 in the first direction is the sum of the dimension of the main housing portion 11 in the first direction and the dimension of the connector 14 in the first direction. The dimension of the housing 1 in the second direction is the dimension of the main housing portion 11 in the second direction.

[0043] The housing 1 is mainly composed of a main housing part 11 and a connector 14. The first direction dimension of the housing 1 is the sum of the first direction dimension of the main housing part 11 and the first direction dimension of the connector 14. Thus, the main housing part 11 and the connector 14 are a single part, which can effectively improve the sealing performance and connection strength of the main housing part 11 and the connector 14. This can avoid gaps between the main housing part 11 and the connector 14, reduce the number of parts, and reduce the steps for installing parts.

[0044] Furthermore, the main housing 11 has a cooling channel 3, which guides the flow of the cooling medium. The height of the cavity of the cooling channel 3 can be set to 1mm-4mm, and the wall thickness can be set to 0.2mm-0.5mm, thereby improving the strength of the cooling channel 3 and preventing deformation. Moreover, the cooling channel 3 can change the direction of the cooling medium flow. A connector 14 is located at one end of the main housing 11 along its length, facilitating connection between the connector 14 and other parts, and also facilitating the flow of the cooling medium into and out of the cooling channel 3.

[0045] Furthermore, connector 14 includes a cooling medium inlet connector and a cooling medium outlet connector, and connecting pipe 2 includes an inlet connecting pipe 21 and an outlet connecting pipe 22. The cooling medium inlet connector and the cooling medium outlet connector are spaced apart. Accordingly, the cooling medium inlet connector is connected to the inlet connecting pipe 21, thereby facilitating the entry of cooling medium into the housing 1. The cooling medium outlet connector is connected to the outlet connecting pipe 22, thereby facilitating the exit of cooling medium.

[0046] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the connector 14 is provided with a barbed groove 141, which extends along a first direction. The cooler 100 also includes a connecting pipe 2, one end of which is sleeved on the connector 14 and engages with the groove 141, and the other end of which is connected to the cooling system.

[0047] The connecting tube 2 is connected to the connector 14 via a barbed groove 141, which makes the connection between the connecting tube 2 and the groove 141 more secure. The groove 141 extends along the first direction, which increases the contact area between the connecting tube 2 and the groove 141, thereby further ensuring the stability of the connection between the connecting tube 2 and the groove 141.

[0048] Connecting pipe 2 is a plastic flexible hose (PVC hose, PA hose) with an inner diameter of 3mm and a wall thickness of 0.5mm. By applying a load to the plastic hose and utilizing its plastic deformation, it directly connects to the inlet and outlet connectors of the cooler 100, achieving a sealing function through an interference fit. On the other side of connecting pipe 2, it can connect to the inlet and outlet of the cooling system. The cooling medium flows into the cooling channel 3 of the cooler 100 through the inlet connecting pipe 21, and after cooling, flows out from the outlet connecting pipe 22, thus forming a cooling cycle.

[0049] According to some embodiments of the present invention, the slot 141 has a top diameter and a bottom diameter, the top diameter is D1 and the bottom diameter is D2, and the included angle formed by the slot 141 and the axial direction of the connector 14 is α. The relationship between D1, D2 and α is: 3.1mm≤D1≤4.1mm, 2.5mm≤D2≤3.5mm, 13°≤α≤19°.

[0050] Specifically, the top diameter usually refers to the diameter of the top of the slot 141, that is, the diameter of the opening side of the slot 141, and the bottom diameter refers to the diameter of the bottom of the slot 141. The top diameter of the slot 141 cannot be greater than 4.1mm. If the top diameter of the slot 141 is greater than 4.1mm, or if the top diameter of the slot 141 is 4.2mm-7mm, when the slot 141 is assembled with the connecting pipe 2, the fitting clearance between the slot 141 and the connecting pipe 2 will be too small, increasing the insertion force and causing assembly difficulties. Therefore, the top diameter of the slot 141 cannot be greater than 4.1mm.

[0051] Furthermore, the top diameter of the slot 141 must not be less than 3.1 mm. If the top diameter of the slot 141 is less than 3.1 mm, or if the top diameter of the slot 141 is 3.0 mm, 2.9 mm, 2.8 mm, or 2.7 mm, etc. (not limited to these), the fit clearance between the slot 141 and the connecting pipe 2 will be too large, which may easily cause the slot 141 to detach from the connecting pipe 2. Therefore, the top diameter of the slot 141 must not be less than 3.1 mm.

[0052] Furthermore, when the top diameter of the slot 141 is 3.1mm, the connecting pipe 2 can be precisely inserted into the slot 141 during assembly, preventing the slot 141 from falling off under external force. When the top diameter of the slot 141 is 4.1mm, the gap between the slot 141 and the connecting pipe 2 is just right during assembly, allowing for easier insertion and maximizing the sealing performance between them.

[0053] Furthermore, the top diameter D1 of the slot 141 can be set to 3.3mm, 3.5mm, 3.8mm or 3.9mm, etc., and is not limited to this. In this way, when the slot 141 is assembled with the connecting pipe 2, it can not only reduce the insertion force between the slot 141 and the connecting pipe 2, but also make the connection between the slot 141 and the connecting pipe 2 tighter and more secure, and improve the sealing performance of the connection between the slot 141 and the connecting pipe 2.

[0054] Furthermore, the bottom diameter of the slot 141 cannot exceed 3.5mm. If the bottom diameter of the slot 141 is greater than 3.5mm, such as 3.6mm, 3.7mm, 3.8mm, or 3.9mm, or not limited to these, an excessively large bottom diameter can easily lead to insufficient compression, affecting the sealing effect between the slot 141 and the connecting pipe 2. Therefore, the bottom diameter of the slot 141 cannot exceed 3.5mm.

[0055] Furthermore, the bottom diameter of the slot 141 cannot be less than 2.5mm. If the bottom diameter of the slot 141 is less than 2.5mm, or if the bottom diameter of the slot is 2.4mm, 2.3mm, 2.2mm, or 2.1mm, etc. (not limited to these), the connecting pipe 2 cannot be inserted into the bottom of the slot 141, resulting in poor assembly and making it inconvenient to insert the connecting pipe 2 into the slot 141. Therefore, the bottom diameter of the slot 141 cannot be less than 2.5mm.

[0056] When the bottom diameter of the slot 141 is 2.5mm, the connecting pipe 2 can be snugly inserted into the slot 141 during assembly, preventing the slot 141 from falling off under external force. When the bottom diameter of the slot 141 is 3.5mm, the gap between the slot 141 and the connecting pipe 2 is just right during assembly, allowing for easier insertion and maximizing the sealing performance between them.

[0057] Furthermore, the bottom diameter of the slot 141 is 2.5mm-3.5mm. For example, the bottom diameter of the slot 141 can be set to 2.6mm, 2.8mm or 2.9mm, etc., and is not limited to this. In this way, when the slot 141 is assembled with the connecting pipe 2, it can not only reduce the insertion force between the slot 141 and the connecting pipe 2, but also make the connection between the slot 141 and the connecting pipe 2 tighter and more secure, and improve the sealing performance of the connection between the slot 141 and the connecting pipe 2.

[0058] Furthermore, the angle α formed by the axial direction of the slot 141 and the connector 14 must not exceed 19°. If the angle α formed by the axial direction of the slot 141 and the connector 14 is greater than 19°, such as 19.1°, 19.2°, 19.3°, or 19.4°, or even more, it can easily lead to an increase in the insertion resistance of the connecting pipe 2 and make assembly inconvenient. Therefore, the angle α formed by the axial direction of the slot 141 and the connector 14 must not exceed 19°.

[0059] Furthermore, the angle α formed by the axial direction of the slot 141 and the connector 14 shall not be less than 13°. If the angle α formed by the axial direction of the slot 141 and the connector 14 is less than 13°, or if the angle α formed by the axial direction of the slot 141 and the connector 14 is 12.9°, 12.8°, 12.7° or 12.6°, etc. (not limited to these), the connecting pipe 2 is prone to deviate or slide out of the slot 141, which makes it inconvenient to install the connecting pipe 2 and the slot 141. Therefore, the angle α formed by the axial direction of the slot 141 and the connector 14 shall not be less than 13°.

[0060] When the angle α formed by the slot 141 and the axial direction of the connector 14 is 13°, the connecting tube 2 can be just inserted into the slot 141. The slot 141 can just provide a clamping force for the connecting tube 2, thereby preventing the connecting tube 2 from shifting or sliding out of the slot 141.

[0061] When the included angle α formed by the groove 141 and the axial direction of the connector 14 is 19°, the resistance between the connecting pipe 2 and the groove 141 is just large when they are inserted. This not only enables the connection between the connecting pipe 2 and the groove 141, but also improves the sealing between the connecting pipe 2 and the groove 141.

[0062] Furthermore, the included angle α formed by the axial direction of the slot 141 and the connector 14 is 13°-19°. For example, the included angle α formed by the axial direction of the slot 141 and the connector 14 can be set to 14.5°, 17.4° or 18.7°. When the connecting tube 2 is inserted into the slot 141, the connecting tube 2 will deform slightly and fit tightly into the barbed slot 141, increasing its sealing performance and increasing the contact area between the connecting tube 2 and the slot 141. This can increase the friction between the connecting tube 2 and the slot 141 and prevent the connecting tube 2 and the slot 141 from loosening.

[0063] Furthermore, multiple slots 141 can be provided, for example, three slots 141 can be provided, which can further increase the contact area between the connecting pipe 2 and multiple slots 141, thereby enabling the connecting pipe 2 to fit tightly with multiple slots 141, and realizing the connection and sealing between the connecting pipe 2 and the connector 14.

[0064] According to some embodiments of this utility model, the inner diameter of the connecting pipe 2 is D3, the wall thickness of the connecting pipe 2 is t1, and the relationship between D3 and t1 is: 2.8mm≤D3≤3.1mm, 0.4mm≤t1≤0.6mm.

[0065] The inner diameter of the connecting pipe 2 must not exceed 3.1 mm. If the inner diameter of the connecting pipe 2 is greater than 3.1 mm, such as 3.2 mm, 3.3 mm, 3.4 mm, or 3.5 mm, or not limited to these, it is easy for the connecting pipe 2 to loosen with the slot 141, causing the connecting pipe 2 to detach from the slot 141. Therefore, the inner diameter of the connecting pipe 2 must not exceed 3.1 mm.

[0066] Furthermore, the inner diameter of the connecting pipe 2 must not be less than 2.8mm. If the inner diameter of the connecting pipe 2 is less than 2.8mm, or if the inner diameter of the connecting pipe 2 is 2.7mm, 2.6mm, 2.5mm or 2.4mm, etc., it will easily increase the resistance between the connecting pipe 2 and the slot 141, making assembly inconvenient. Therefore, the inner diameter of the connecting pipe 2 must not be less than 2.8mm.

[0067] Furthermore, when the inner diameter of the connecting pipe 2 is 2.8mm, the resistance between the connecting pipe 2 and the slot 141 is just large, which can improve the sealing between the connecting pipe 2 and the slot 141, and make the connection between the connecting pipe 2 and the slot 141 more stable and firm.

[0068] When the inner diameter of the connecting tube 2 is 3.1mm, the gap between the connecting tube 2 and the slot 141 is just small. This not only makes it easier to insert the connecting tube 2 into the slot 141, but also ensures the sealing between the connecting tube 2 and the slot 141.

[0069] Furthermore, the inner diameter of the connecting pipe 2 is 2.8mm-3.1mm. For example, the inner diameter of the connecting pipe 2 can be set to 2.9mm, 3mm and 3.1mm, etc., and is not limited to this. In this way, the assembly of the connecting pipe 2 and the slot 141 can be smoothly realized, and the sealing performance of the connecting pipe 2 and the slot 141 can also be guaranteed.

[0070] The wall thickness t1 of the connecting pipe 2 cannot be greater than 0.6mm. If the wall thickness t1 of the connecting pipe 2 is greater than 0.6mm, such as 0.61mm, 0.62mm, 0.63mm or 0.64mm, or not limited to these, it will easily lead to increased costs and make it difficult for the connecting pipe 2 to deform during the assembly process with the slot 141, thus increasing the assembly difficulty. Therefore, the wall thickness t1 of the connecting pipe 2 cannot be greater than 0.6mm.

[0071] Furthermore, the wall thickness t1 of the connecting pipe 2 must not be less than 0.4mm. If the wall thickness t1 of the connecting pipe 2 is less than 0.4mm, such as 0.39mm, 0.38mm, 0.37mm, or 0.36mm, or not limited to these, it is easy to damage the connecting pipe 2 and reduce its service life. Therefore, the wall thickness t1 of the connecting pipe 2 must not be less than 0.4mm.

[0072] When the wall thickness t1 of the connecting pipe 2 is 0.4mm, it provides good strength and wear resistance, thus preventing damage. When the wall thickness t1 of the connecting pipe 2 is 0.6mm, it allows the connecting pipe 2 to easily deform during assembly with the slot 141, facilitating the insertion of the connecting pipe 2 into the slot 141 and extending its service life.

[0073] Furthermore, the wall thickness of the connecting pipe 2 is 0.4mm-0.6mm. For example, the wall thickness t1 of the connecting pipe 2 can be set to 0.51mm, 0.55mm, 0.57mm or 0.58mm, etc., and is not limited to this. In this way, the cost can be reduced, the service life of the connecting pipe 2 can be extended, and damage can be prevented.

[0074] According to some embodiments of this utility model, the housing 1 is an insulating housing.

[0075] The housing 1 can be made of plastic, which provides higher insulation performance. This insulating housing effectively prevents the cooling medium from directly contacting the electrical components inside the battery pack, thus avoiding safety hazards caused by leakage or accidental short circuits. Furthermore, the insulating housing provides some heat insulation, preventing external heat from entering the battery pack and further improving cooling efficiency.

[0076] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the housing 1 includes a top shell 12 and a bottom shell 13. The top shell 12 is an integrally injection-molded top shell 12. In a third direction of the housing 1, the third direction is perpendicular to the first direction and the second direction respectively. The bottom shell 13 is connected to the bottom of the top shell 12 and is an integrally injection-molded bottom shell 13.

[0077] The third direction of the housing 1 can be its height. The bottom shell 13 is connected to the bottom of the top shell 12, facilitating the formation of the entire housing 1. The top shell 12 is integrally injection molded. The top shell 12 can be made of polyethylene, polyvinyl chloride, or polypropylene, ensuring that it forms a robust whole without seams or connection points. This not only improves its strength but also effectively prevents damage to the top shell 12 due to vibration, impact, or other external forces. Furthermore, the integrally injection molded top shell 12 reduces interfaces and gaps between parts, thus providing a better sealing effect.

[0078] Similarly, the one-piece injection-molded base shell 13, which can be made of polyethylene, polyvinyl chloride, or polypropylene, ensures that the base shell 13 forms a robust whole without seams or connection points. This not only improves its strength but also effectively prevents damage to the base shell 13 caused by vibration, impact, or other external forces. Furthermore, the one-piece injection-molded base shell 13 reduces interfaces and gaps between parts, thus providing a better sealing effect.

[0079] Furthermore, both the top shell 12 and the bottom shell 13 can be filled with high thermal conductivity filler particles. For example, the high thermal conductivity filler particles can be alumina particles, aluminum nitride particles, and silicon nitride particles. These filler particles themselves have very high thermal conductivity, which is not less than 1.2 W / (mK). By uniformly dispersing them in the top shell 12 and the bottom shell 13, an efficient heat conduction path can be formed, thereby effectively improving the overall thermal conductivity of the top shell 12 and the bottom shell 13. The heat generated by the battery pack can be transferred to the external environment more quickly, thereby preventing overheating.

[0080] According to some embodiments of the present invention, the top shell 12 and the bottom shell 13 are bonded together.

[0081] The top shell 12 and the bottom shell 13 are bonded together, which can provide a uniform stress distribution. Compared with the local stress concentration caused by mechanical connections (such as screws), the bonded connection can more effectively improve the overall strength and rigidity of the shell 1, making the shell 1 more robust and durable.

[0082] Furthermore, the top shell 12 and the bottom shell 13 are bonded together with an adhesive, which can form a sealing layer between the top shell 12 and the bottom shell 13, providing a good sealing effect and effectively preventing external pollutants such as moisture and dust from entering the shell 1.

[0083] Moreover, when one of the top shell 12 and the bottom shell 13 is damaged, it is not necessary to replace the entire shell 1. When the top shell 12 is damaged, only the top shell 12 needs to be replaced. In this way, costs can be reduced and the service life of the shell 1 can be extended.

[0084] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, a cooling channel 3 and a heat exchange chamber 4 are formed inside the shell 1. The cooling channel 3 and the heat exchange chamber 4 are independently separated from each other. The cooling channel 3 forms an independent first space inside the shell 1, and the heat exchange chamber 4 forms an independent second space inside the shell 1. The first space and the second space are not connected to each other. The heat exchange chamber 4 is at least partially filled with a heat exchange medium.

[0085] The cooling channel 3 and the heat exchange chamber 4 are independently separated, preventing the cooling medium in the cooling channel 3 from flowing into the heat exchange chamber 4, thus avoiding the influence of the cooling medium on the heat exchange chamber 4. The cooling channel 3 forms an independent first space within the shell 1, which increases the volume of the cooling medium (such as coolant) within the cooling channel 3, thereby improving the cooling rate of the cooler 100 and the heat transfer efficiency. The first space and the second space are not interconnected, which improves the stability between the cooling channel 3 and the heat exchange chamber 4 and allows the cooling channel 3 and the heat exchange chamber 4 to exchange heat independently, thus preventing the first space from affecting the second space. Moreover, the heat exchange chamber 4 is at least partially filled with a heat exchange medium, which has a certain heat capacity and thermal conductivity, and can absorb and disperse heat from local high-temperature areas. Furthermore, the heat exchange medium can respond quickly to changes in heat, thereby preventing damage caused by instantaneous overheating of the battery pack. The heat exchange medium can absorb or release a large amount of heat in a short time, acting as a "thermal buffer," mitigating temperature fluctuations, and enhancing the stability of the cooler 100.

[0086] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the cooling channel 3 has at least one bend in its extending direction. The cooling channel 3 has a first heat exchange sidewall 7 and a second heat exchange sidewall 8, which are spaced apart. The cooling channel 3 defines a first space between the first heat exchange sidewall 7 and the second heat exchange sidewall 8. The first space divides the second space into a first side space and a second side space on the housing 1. The first side space is disposed close to the first heat exchange sidewall 7 and is located on the side of the first heat exchange sidewall 7 facing away from the first space. The second side space is disposed close to the second heat exchange sidewall 8 and is located on the side of the second heat exchange sidewall 8 facing away from the first space.

[0087] The cooling channel 3 has at least one bend in its extending direction, and the number of bends can be odd, such as three, so that the inlet and outlet ends of the cooling channel 3 are located on the same edge of the housing 1. Furthermore, having at least one bend in its extending direction allows the cooling channel 3 to bend within the housing 1, forming multiple curved paths. This increases the flow path length of the cooling medium within the housing 1 and extends the contact time between the cooling medium and the object being cooled, thereby improving the efficiency of heat exchange.

[0088] Furthermore, the first heat exchange sidewall 7 and the second heat exchange sidewall 8 are spaced apart, and a first space is defined between the first heat exchange sidewall 7 and the second heat exchange sidewall 8. The first space can provide a flow path for the cooling medium and can also serve to contain the cooling medium. The first space divides the second space into the first side space and the second side space on the shell 1, which can make the heat exchange chamber 4 distributed in different areas, thereby improving the heat exchange efficiency.

[0089] Furthermore, the first side space is positioned close to the first heat exchange side wall 7, which further increases the surface area of ​​contact between the first side space and the first heat exchange side wall 7, thereby improving the heat transfer efficiency. The first side space is located on the side of the first heat exchange side wall 7 facing away from the first space, which can further absorb and disperse the heat in the local high-temperature area, thereby improving the temperature stability of the cooler 100.

[0090] Similarly, the second side space is positioned close to the second heat exchange sidewall 8, which further increases the contact surface area between the second side space and the second heat exchange sidewall 8, thereby improving heat transfer efficiency. Moreover, the second side space is located on the side of the second heat exchange sidewall 8 opposite to the first space, which can further absorb and disperse heat from local high-temperature areas, thereby improving the temperature stability of the cooler 100.

[0091] According to some embodiments of this utility model, the heat exchange medium is one of phase change material, water, methanol, and acetone.

[0092] The phase change material of the heat exchange medium can be paraffin or dodecanol. In this way, it can absorb or release a large amount of latent heat at a constant temperature, which can effectively control the temperature inside the cooler 100 and thus prevent overcooling or overheating.

[0093] When water is used as the heat exchange medium, its high specific heat capacity allows it to absorb a large amount of heat without causing a rapid temperature rise. When methanol is used, its lower freezing point compared to water makes it more suitable for applications in cold environments, such as winter. When acetone is used, its high volatility and rapid evaporation properties allow it to quickly remove a significant amount of heat, making it suitable for applications requiring high-efficiency heat dissipation.

[0094] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the portion of the top shell 12 corresponding to the heat exchange chamber 4 is provided with a medium injection port 5.

[0095] Specifically, the portion of the top shell 12 corresponding to the heat exchange chamber 4 is provided with a medium injection port 5. This facilitates the injection of heat exchange medium into the heat exchange chamber 4 and allows control over the injection of heat exchange medium into a designated heat exchange chamber 4, thereby making the heat exchange medium filling more uniform.

[0096] Furthermore, after the heat exchange medium is injected, the medium injection port 5 can be sealed with glue to achieve a seal, thereby preventing leakage of the heat exchange medium.

[0097] According to some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the shell 1 has a partition rib 6 protruding along a third direction between the cooling channel 3 and the heat exchange chamber 4. The third direction is perpendicular to the first direction and the second direction, respectively.

[0098] The partition rib 6 protrudes along the third direction of the shell 1, which facilitates the connection between the top shell 12 and the bottom shell 13. Moreover, the partition rib 6 can separate the cooling channel 3 and the heat exchange chamber 4, making the heat exchange chamber 4 a closed area. For example, heat exchange chambers are provided on both sides of the cooling channel 3, so the partition rib 6 can divide it into three cavities. In this way, the heat exchange area with the outside can be further increased, thereby improving the heat exchange efficiency.

[0099] Furthermore, the encapsulation edge of the housing 1 is widened to form reinforcing ribs, which not only facilitates the installation of the edge of the housing 1, but also further improves its sealing performance and strength.

[0100] According to some embodiments of the present invention, the dimension of the cooling channel 3 in the third direction is H1, the third direction is perpendicular to the first direction and the second direction respectively, and the wall thickness of the cooling channel 3 is t2. H1 and t2 satisfy the following relationship: 1mm≤H1≤4mm, 0.2mm≤t2≤0.5mm.

[0101] Among them, the dimension H1 of the cooling channel 3 in the third direction cannot be greater than 4mm. The third direction can be the height direction of the cooling channel 3. If the dimension H1 of the cooling channel 3 in the third direction is greater than 4mm, such as 4.1mm, 4.2mm, 4.3mm or 4.4mm, etc., it will cause the dimension of the cooling channel 3 in the third direction to become larger, the flow speed of the cooling medium will decrease, resulting in lower local cooling efficiency. Therefore, the dimension H1 of the cooling channel 3 in the third direction cannot be greater than 4mm.

[0102] Furthermore, the dimension H1 of the cooling channel 3 in the third direction must not be less than 1 mm. If the dimension H1 of the cooling channel 3 in the third direction is less than 1 mm, or if the dimension H1 of the cooling channel 3 in the third direction is 0.9 mm, 0.8 mm, 0.7 mm or 0.6 mm, etc., it will result in the cooling channel 3 being too small, which will limit the flow rate of the cooling medium. Therefore, the dimension H1 of the cooling channel 3 in the third direction must not be less than 1 mm.

[0103] When the dimension H1 of the cooling channel 3 in the third direction is 1 mm, it can just meet the flow rate of the cooling medium, thus ensuring cooling efficiency. When the dimension H1 of the cooling channel 3 in the third direction is 4 mm, it can just meet the flow velocity of the cooling medium, thus improving local cooling efficiency.

[0104] Furthermore, the dimension H1 of the cooling channel 3 in the third direction is 1mm-4mm. For example, the dimension H1 of the cooling channel 3 in the third direction can be set to 2.2mm, 3mm, 3.7mm or 3.9mm, etc., and is not limited to this. This facilitates the flow of the cooling medium and increases the flow rate of the cooling medium.

[0105] Furthermore, the wall thickness t2 of the cooling channel 3 cannot exceed 0.5 mm. If the wall thickness t2 of the cooling channel 3 is greater than 0.5 mm, such as 0.51 mm, 0.52 mm, 0.53 mm, or 0.54 mm, or not limited to these, it will easily lead to increased costs and weight. Therefore, the wall thickness t2 of the cooling channel 3 cannot exceed 0.5 mm.

[0106] Furthermore, the wall thickness t2 of the cooling channel 3 must not be less than 0.2 mm. If the wall thickness t2 of the cooling channel 3 is less than 0.2 mm, such as 0.19 mm, 0.18 mm, 0.17 mm, or 0.16 mm (or less), it is easy for the cooling channel 3 to be damaged, resulting in lower strength and increased susceptibility to deformation. Therefore, the wall thickness t2 of the cooling channel 3 must not be less than 0.2 mm.

[0107] When the wall thickness t2 of the cooling channel 3 is 0.2mm, it achieves a balance between high strength and low deformation. When the wall thickness t2 of the cooling channel 3 is 0.5mm, it achieves a balance between light weight and reduced cost.

[0108] Furthermore, the wall thickness t2 of the cooling channel 3 is 0.2mm-0.5mm. For example, the wall thickness t2 of the cooling channel 3 can be set to 0.31mm, 0.45mm or 0.49mm, etc., and is not limited to this. In this way, the cost can be reduced and the strength of the cooling channel 3 can be increased, thereby preventing it from deforming.

[0109] According to some embodiments of this utility model, such as Figure 2 As shown, the dimension of the third direction of the housing 1 is H2. The third direction is perpendicular to the first direction and the second direction respectively. H2 satisfies the relationship: 2mm≤H2≤5mm.

[0110] Specifically, the third-dimensional dimension of housing 1 must be no less than 2mm. If the third-dimensional dimension of housing 1 is less than 2mm, such as 1.9mm, 1.8mm, 1.7mm, or 1.6mm (or similar dimensions), the internal space of housing 1 will be smaller, resulting in less cooling medium inside housing 1. This will reduce the cooling effect on the battery pack and thus fail to improve cooling efficiency. Therefore, the third-dimensional dimension of housing 1 must not be less than 2mm.

[0111] Furthermore, the third-party dimension of housing 1 should not exceed 5mm. If the third-party dimension of housing 1 exceeds 5mm, such as 5.1mm, 5.2mm, 5.3mm, or 5.4mm (or similar), it will occupy a large amount of space in that direction, thus restricting the installation position of housing 1 and potentially causing interference with other components. Therefore, the third-party dimension of housing 1 should not exceed 5mm.

[0112] When the third dimension of housing 1 is 2mm, the internal space of housing 1 is just large enough that the flow rate of the cooling medium can meet the cooling effect of the battery pack, thus ensuring its cooling efficiency. When the third dimension of housing 1 is 5mm, the space of housing 1 is just maximized, and there is no interference with other components.

[0113] Furthermore, the third-dimensional dimension of the housing 1 is 2mm-5mm. For example, the third-dimensional dimension of the housing 1 can be set to 2.5mm, 3.5mm, 4mm, or 4.5mm, etc., and is not limited to this. This not only increases the internal space of the housing 1, but also avoids interference with other components and allows for flexible placement in the overheated area of ​​the battery pack. Moreover, the smaller third-dimensional dimension of the housing 1 can reduce the volume of the cooling channel 3, thereby increasing the flow rate of the cooling medium and further improving its cooling efficiency.

[0114] According to some embodiments of the present invention, the bottom shell 13 is a plane facing away from the top shell 12 along a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0115] Specifically, when the housing 1 is placed in the area of ​​the battery pack that needs to be cooled, the bottom housing 13 is away from the top housing 12 along a third direction, that is, the bottom surface of the bottom housing 13, which can increase the contact area with the area that needs to be cooled, thereby improving its heat conduction function and making it more stable.

[0116] According to a second aspect of the present invention, a battery pack includes a cooler 100 of the battery pack described above, the cooler 100 being adhered to the battery pack.

[0117] The casing 1 is bonded to the battery pack using double-sided adhesive to achieve heat conduction (for example, the copper busbar junction of the pack and the power distribution fuse area can also be injection molded into a matching shape, so as to ensure a more stable installation and achieve a better cooling effect).

[0118] The electrical device according to a third aspect of the present invention includes the battery pack described in the above embodiments.

[0119] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0121] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooler for a battery pack, characterized in that, include: The shell (1) has a first direction dimension of L and a second direction dimension of W. The first direction and the second direction are perpendicular. L and W satisfy the following relationship: 10mm≤L≤50mm, 10mm≤W≤50mm.

2. The cooler for the battery pack according to claim 1, characterized in that, The housing (1) includes: The main shell (11) has cooling channels (3) formed thereon. A connector (14) is disposed at one end of the main housing (11) in the first direction, and the connector (14) is connected to the cooling channel (3); Wherein, the dimension of the housing (1) in the first direction is the sum of the dimension of the main housing part (11) in the first direction and the dimension of the connector (14) in the first direction, and the dimension of the housing (1) in the second direction is the dimension of the main housing part (11) in the second direction.

3. The cooler for the battery pack according to claim 2, characterized in that, The connector (14) is provided with a barbed groove (141) that extends along the first direction.

4. The cooler for the battery pack according to claim 3, characterized in that, The slot (141) has a top diameter and a bottom diameter, the top diameter is D1, the bottom diameter is D2, and the angle formed by the slot (141) and the axial direction of the connector (14) is α. The relationship between D1, D2 and α is: 3.1mm≤D1≤4.1mm, 2.5mm≤D2≤3.5mm, 13°≤α≤19°.

5. The cooler for the battery pack according to claim 3, characterized in that, The cooler also includes: A connecting pipe (2) is provided, one end of which is fitted onto the connector (14) and engages with the slot (141), and the other end of which is connected to the cooling system.

6. The cooler for the battery pack according to claim 5, characterized in that, The inner diameter of the connecting pipe (2) is D3, and the wall thickness of the connecting pipe (2) is t1. The relationship between D3 and t1 is: 2.8mm≤D3≤3.1mm, 0.4mm≤t1≤0.6mm.

7. The cooler for the battery pack according to claim 1, characterized in that, The housing (1) is an insulating housing (1).

8. The cooler for the battery pack according to claim 7, characterized in that, The housing (1) includes: Top shell (12); The bottom shell (13) is located in a third direction of the shell (1), which is perpendicular to the first direction and the second direction, respectively. The bottom shell (13) is connected to the bottom of the top shell (12).

9. The cooler for the battery pack according to claim 8, characterized in that, The top shell (12) is bonded to the bottom shell (13).

10. The cooler for the battery pack according to claim 8, characterized in that, The shell (1) has a cooling channel (3) and a heat exchange chamber (4) formed inside it. The cooling channel (3) and the heat exchange chamber (4) are independently separated from each other. The cooling channel (3) forms an independent first space inside the shell (1). The heat exchange chamber (4) forms an independent second space inside the shell (1). The first space and the second space are not connected to each other. The heat exchange chamber (4) is at least partially filled with a heat exchange medium.

11. The cooler for the battery pack according to claim 10, characterized in that, The cooling channel (3) has at least one bend in its extending direction, and the cooling channel (3) has a first heat exchange sidewall (7) and a second heat exchange sidewall (8), the first heat exchange sidewall (7) and the second heat exchange sidewall (8) being spaced apart and defining the first space between them; The first space divides the second space into a first side space and a second side space on the housing (1). The first side space is disposed close to the first heat exchange side wall (7) and is located on the side of the first heat exchange side wall (7) facing away from the first space. The second side space is disposed close to the second heat exchange side wall (8) and is located on the side of the second heat exchange side wall (8) facing away from the first space.

12. The cooler for the battery pack according to claim 10, characterized in that, The heat exchange medium is one of phase change material, water, methanol, and acetone.

13. The cooler for the battery pack according to claim 10, characterized in that, The top shell (12) is provided with a medium injection port (5) in the part corresponding to the heat exchange chamber (4).

14. The cooler for the battery pack according to claim 10, characterized in that, The housing (1) is provided with a partition rib (6) protruding along a third direction between the cooling channel (3) and the heat exchange chamber (4), the third direction being perpendicular to the first direction and the second direction respectively.

15. The cooler for the battery pack according to claim 10, characterized in that, The cooling channel (3) has a dimension of H1 in the third direction, which is perpendicular to the first direction and the second direction respectively. The wall thickness of the cooling channel (3) is t2. H1 and t2 satisfy the following relationship: 1mm≤H1≤4mm, 0.2mm≤t2≤0.5mm.

16. The cooler for the battery pack according to claim 1, characterized in that, The third dimension of the housing (1) is H2, which is perpendicular to the first direction and the second direction respectively. H2 satisfies the relationship: 2mm≤H2≤5mm.

17. The cooler for the battery pack according to claim 8, characterized in that, The bottom shell (13) is a plane facing away from the top shell (12) along a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

18. A battery pack, characterized in that, A cooler for a battery pack comprising any one of claims 1-17, wherein the cooler for the battery pack is bonded to the battery pack.

19. An electrical appliance, characterized in that, Includes the battery pack described in claim 18.

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