Liquid cooling plate assembly, cooling system, battery pack and electric equipment

Abstract

The utility model discloses a liquid cooling plate assembly, a cooling system, a battery pack and electric equipment, the liquid cooling plate assembly comprises a plurality of liquid cooling plates which are arranged side by side at intervals, battery cells are located between two adjacent liquid cooling plates, and liquid cooling flow channels are arranged in the liquid cooling plates; the multiple current collectors are arranged in one-to-one correspondence with the multiple liquid cooling plates, each current collector is of an integrally formed structure and comprises a main body part and water channel connectors arranged on the two sides of the main body part, the main body parts are connected to the end parts of the liquid cooling plates, and the main body parts are internally provided with flow guide flow channels communicated with the liquid cooling flow channels; and two ends of the connecting pipe are respectively communicated with the water channel joints of the two adjacent liquid cooling plates. According to the embodiment of the utility model, the liquid cooling plate assembly comprises the plurality of liquid cooling plates and the plurality of current collectors, each current collector is of an integrally formed structure, and each current collector comprises the main body part and the water channel joint, so that the structural strength of the current collectors is improved, the assembly efficiency of the current collectors is improved, and the sealing performance of the connecting parts of the main body parts and the water channel joints can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid cooling plate assembly, a cooling system, a battery pack and electrical equipment. Background Art

[0002] In order to effectively dissipate heat at high temperatures or efficiently heat up low temperatures in the battery pack, a liquid cooling plate is generally arranged between the battery cells, and a certain flow of heat exchange fluid is passed through the liquid cooling plate to dissipate heat or heat the battery cells. This ensures that the battery pack operates within a suitable temperature range. At present, the current collector used adopts a split design, which is cumbersome to assemble; and the current collector of the split design is prone to assembly gaps at the connection, resulting in poor sealing, which will affect the safe and reliable operation of the battery pack and reduce the service life of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a liquid cooling plate assembly, wherein the current collector is an integrally formed structure, which can improve the sealing performance of the current collector and the assembly efficiency of the current collector.

[0004] The utility model also provides a cooling system having the liquid cooling plate assembly.

[0005] The utility model also provides a battery pack having the cooling system.

[0006] The utility model also provides an electrical device having the battery pack.

[0007] According to the first aspect of the utility model, the liquid cooling plate assembly includes: a plurality of liquid cooling plates, arranged side by side and spaced apart, the battery core is located between two adjacent liquid cooling plates, and the liquid cooling plate has a liquid cooling flow channel; a plurality of current collectors, arranged one by one corresponding to the plurality of liquid cooling plates, each of the current collectors is an integrally formed structure, including a main body and water channel joints arranged on both sides of the main body, the main body is connected to the end of the liquid cooling plate, and the main body has a guide flow channel connected to the liquid cooling flow channel; a connecting pipe, the two ends of the connecting pipe are respectively connected to the water channel joints of the two adjacent current collectors.

[0008] According to the liquid cooling plate assembly of the utility model, it includes multiple liquid cooling plates and multiple current collectors, each of which is an integrally formed structure. The current collector includes a main body and a water channel joint. The water channel joint and the main body are integrally formed to form a current collector, which can increase the structural strength of the current collector and increase the sealing of the connection between the main body and the water channel joint. It can also omit the process of installing the water channel joint on the main body, thereby improving the assembly efficiency of the current collector.

[0009] In some embodiments, the main body has a slot opening toward the liquid cooling plate, an end of the liquid cooling plate is inserted into the slot, and the liquid cooling plate assembly also includes a seal for sealing an assembly gap between the liquid cooling plate and the slot.

[0010] This embodiment can achieve the connection between the liquid cooling plate and the main body by providing a slot and a seal, thereby increasing the connection strength between the liquid cooling plate and the main body; it can also seal the assembly gap between the liquid cooling plate and the slot to prevent the heat exchange medium from leaking from the assembly gap between the liquid cooling plate and the slot.

[0011] In some embodiments, the seal comprises a sealant.

[0012] In this embodiment, by providing a sealing member including a sealant, the sealing method between the liquid cooling plate and the slot can be simple and low in cost.

[0013] In some embodiments, the end of the connecting pipe is interference fit into the waterway joint.

[0014] In this embodiment, the reliability of the connection between the connecting pipe and the water channel joint can be increased by arranging the end of the connecting pipe to be inserted into the water channel joint through interference fit.

[0015] In some embodiments, the water channel joint has a first positioning portion, and both ends of the connecting pipe have a second positioning portion that is positioned and matched with the first positioning portion.

[0016] This embodiment provides a first positioning portion and a second positioning portion, and the first positioning portion and the second positioning portion are positioned and matched to determine the assembly position of the connecting pipe inserted into the waterway joint, so as to improve the accuracy of the assembly position of the connecting pipe inserted into the waterway joint.

[0017] In some embodiments, the first positioning portion is a positioning groove, and the second positioning portion is a positioning protrusion that is positioned and matched with the positioning groove.

[0018] In this embodiment, by providing the positioning protrusion and the positioning groove, the method of determining the installation position of the connecting pipe on the waterway joint can be simplified, which is easier to implement during assembly and has higher accuracy.

[0019] In some embodiments, the positioning groove is annular and surrounds the inner surface of the waterway joint.

[0020] In this embodiment, the positioning groove is set to be a ring shape surrounding the inner surface of the water channel joint, so that the processing technology of the positioning groove can be simplified.

[0021] In some embodiments, the positioning protrusion is annular and fits with the annular positioning groove.

[0022] In this embodiment, the positioning protrusion is arranged to be in a ring shape surrounding the outer surface of the connecting pipe, so that the processing technology of the positioning protrusion can be simplified.

[0023] In some embodiments, the connecting tube is an integrally formed metal tube, and the positioning protrusion is constructed by protruding outward from the surface of the metal tube.

[0024] This embodiment reduces the steps of installing the positioning protrusion on the metal tube by integrally forming the metal tube and the positioning protrusion, thereby improving the production efficiency of the connecting tube and reducing the production cost of the connecting tube; it can also increase the strength of the positioning protrusion installed on the metal tube.

[0025] In some embodiments, the current collector is an integrally-injected molded part.

[0026] In this embodiment, the current collector is provided as an integrally-injected injection-molded part, so that the production cost of the current collector can be reduced.

[0027] In some embodiments, the current collector includes an outer injection-molded layer and an inner injection-molded layer, the outer injection-molded layer covers the outer surface of the inner injection-molded layer, and the hardness of the outer injection-molded layer is greater than that of the inner injection-molded layer.

[0028] In this embodiment, the current collector includes an outer injection molded layer and an inner injection molded layer. The outer injection molded layer covers the outer surface of the inner injection molded layer. The hardness of the outer injection molded layer is greater than that of the inner injection molded layer. When the current collector is hit, the risk of deformation of the current collector can be reduced, thereby improving the safety of the current collector. It can also facilitate the interference fit of the end of the connecting tube into the waterway joint to increase the sealing between the end of the connecting tube and the waterway joint.

[0029] In some embodiments, the water channel joint is a hollow round tube, square tube or flat tube; the connecting tube is a hollow round tube, square tube or flat tube.

[0030] In this embodiment, the water channel joint is configured as a hollow round tube, square tube or flat tube, and the connecting tube is configured as a hollow round tube, square tube or flat tube. When the bending and torsional strengths are the same, the mass is relatively light, which can reduce the overall weight of the collector, and further reduce the overall weight of the liquid cooling plate assembly, thereby improving the lightweight of the battery pack.

[0031] In some embodiments, a portion of the main body extends in a direction away from the liquid cooling plate to form a connecting portion, and the water channel joints are provided on both sides of the connecting portion.

[0032] In this embodiment, a connecting portion is constructed by extending a portion of the main body in a direction away from the liquid cooling plate, and water channel joints are provided on both sides of the connecting portion, which can reduce the space occupied by the current collector and thus save the space occupied by the battery pack.

[0033] A cooling system according to a second aspect of the utility model comprises a liquid cooling plate assembly according to the first aspect of the utility model.

[0034] According to the cooling system of the utility model, by providing the liquid cooling plate assembly of the first aspect, the sealing performance of the cooling system can be improved and the cost of the cooling system can be reduced.

[0035] The battery pack according to the third aspect of the utility model includes the cooling system according to the second aspect of the utility model.

[0036] According to the battery pack of the present invention, by providing the cooling system of the second aspect, the production cost and occupied space of the battery pack can be reduced.

[0037] The electrical equipment according to the fourth aspect of the utility model includes the battery pack according to the third aspect of the utility model.

[0038] According to the electric device of the utility model, the overall performance of the electric device is improved by providing the battery pack of the third aspect.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 is a schematic diagram of a vehicle according to an embodiment of the utility model;

[0042] Figure 2 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0043] Figure 3 This is a three-dimensional diagram of the cooperation between the liquid cooling plate assembly and the battery cell according to an embodiment of the utility model;

[0044] Figure 4 yes Figure 3 A top view of the liquid cooling plate assembly and the battery cell shown in FIG.

[0045] Figure 5 yes Figure 3 A front view of the liquid cooling plate assembly and the battery cell shown in FIG.

[0046] Figure 6 It is a schematic diagram of the coordination of the liquid cooling plate, the current collector and the battery cell according to an embodiment of the utility model;

[0047] Figure 7It is a three-dimensional diagram of the cooperation between the liquid cooling plate and the current collector according to an embodiment of the utility model;

[0048] Figure 8 yes Figure 7 A front view of the liquid cooling plate and the current collector when they are in cooperation;

[0049] Fig. 9 yes Figure 7 A top view of the liquid cooling plate and the current collector when they are in cooperation;

[0050] Fig.10 yes Figure 7 A side view of the liquid cooling plate and the current collector when they are in cooperation;

[0051] Fig.11 is along Fig.10 Sectional view along line AA;

[0052] Fig.12 is a stereoscopic diagram of a connecting pipe according to an embodiment of the utility model;

[0053] Fig.13 yes Fig.12 A front view of the connecting pipe shown in ;

[0054] Fig.14 yes Fig.12 Side view of the connecting pipe shown in .

[0055] Reference numerals:

[0056] 100. vehicle; 101. controller; 102. motor;

[0057] 10. Battery pack; 11. Battery cell; 12. Box body; 13. Cover plate;

[0058] 20. Liquid cooling plate assembly; 21. Liquid cooling plate; 22. Current collector; 221. Main body; 2211. Connecting plate; 2212. Connecting portion; 2213. Slot; 222. Water channel joint; 2221. First positioning portion; 223. Diversion channel; 23. Connecting pipe; 231. Second positioning portion; 232. Positioning protrusion; 24. Sealing member. DETAILED DESCRIPTION

[0059] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0060] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0061] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0062] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0063] During the use of the battery, in order to ensure the safety performance of the battery, a water cooling plate is generally arranged between the battery cells, or an air cooling mode is used for heat dissipation. The water cooling plates currently used are mostly integrated water cooling plates and harmonica tube water cooling plates, wherein the harmonica tube water cooling plate generally includes a front current collector, a rear current collector, and a harmonica tube with two ends respectively connected to the front current collector and the rear current collector. The heat exchange fluid generally enters the harmonica tube from the front current collector and then is discharged through the rear current collector. However, such a harmonica tube water cooling plate occupies more space in the battery pack, which may increase the external size of the battery pack. Alternatively, the water inlet and the water outlet are all arranged on the front end current collector, and the heat exchange fluid generally enters the harmonica tube through the water inlet, and then flows out of the harmonica tube through the water outlet. However, such a front end current collector is generally a split design, and the split front end current collector is assembled through a sealing component, which is cumbersome to assemble and increases the workload; and the split design will inevitably have an assembly gap during assembly, resulting in a poor seal of the front end current collector, which will affect the safe and reliable operation of the battery pack and reduce the service life of the battery pack.

[0064] Based on the above considerations, in order to solve the problem of how to improve the sealing of the current collector while reducing the installation space required for the harmonica tube water cooling plate, a liquid cooling plate assembly is designed. The liquid cooling plate assembly includes multiple liquid cooling plates and multiple current collectors. A current collector is corresponding to a liquid cooling plate, which can reduce the space occupied by the current collector, thereby saving the space occupied by the battery pack; at the same time, it also saves the working time of assembling the current collector, thereby improving the assembly efficiency of the current collector.

[0065] Each current collector is an integrally formed structure, and each current collector includes a main body and a water channel joint. The water channel joints are arranged on both sides of the main body. The water channel joints and the main body are integrally formed, which can ensure the structural strength of the current collector; it can also increase the sealing of the connection between the water channel joint and the main body. When the heat exchange medium flows in the current collector, it is not easy to leak from the connection between the water channel joint and the main body; it can also save the process of installing the water channel joint on the main body, thereby improving the assembly efficiency of the current collector.

[0066] The liquid cooling plate assembly disclosed in the present application can be used in electrical devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0067] For the convenience of description, the following embodiments are described by taking a vehicle 100 as an example of an electrical device according to an embodiment of the present invention.

[0068] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 100 provided for some embodiments of the utility model. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery pack 10 is provided inside the vehicle 100, and the battery pack 100 may be provided at the bottom, the head or the tail of the vehicle 100. The battery pack 10 can be used to power the vehicle 100, for example, the battery pack 10 can be used as an operating power source for the vehicle 100. The vehicle 100 may also include a controller 101 and a motor 102, and the controller 101 is used to control the battery pack 10 to power the motor 102, for example, for the starting, navigation and working power requirements of the vehicle 100 during driving.

[0069] In some embodiments of the present invention, the battery pack 10 can be used not only as an operating power source for the vehicle 100 , but also as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0070] Reference Figure 2 , Figure 2 Schematic diagram of a battery pack 10 of some embodiments of the utility model. The battery pack 10 includes a box 12, a battery cell 11 and a liquid cooling plate assembly 20. The box 12 has a receiving cavity, the battery cell 11 is received in the receiving cavity of the box 12, and the liquid cooling plate assembly 20 is arranged between two adjacent battery cells 11. Among them, the box 12 is used to provide a receiving space for the battery cell 11, and the box 12 can adopt a variety of structures. In some embodiments, the box 12 may include a first part (such as a main box) and a second part (such as a cover plate 13), the first part and the second part cover each other, and the first part and the second part jointly define a receiving space for accommodating the battery cell 11. The second part may be a hollow structure with an opening at one end, the first part may be a plate-like structure, the first part covers the opening side of the second part, so that the first part and the second part jointly define a receiving space; the first part and the second part may also be hollow structures with one side opening, and the opening side of the first part covers the opening side of the second part. Of course, the box 12 formed by the first part and the second part may be in a variety of shapes, such as a cylinder, a cuboid, etc. Optionally, in some embodiments, the box 12 further includes a bottom guard plate, which is arranged on the lower side of the bottom plate of the box 12 to further enhance the bearing strength and impact resistance of the bottom of the box 12. The material of the bottom guard plate can also be various, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0071] In the battery pack 10, there can be multiple battery cells 11, and the multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 11 are both connected in series and in parallel. The multiple battery cells 11 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 11 is accommodated in the box 12; of course, the battery pack 10 can also be a battery module formed by connecting multiple battery cells 11 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 12. The battery pack 10 can also include other structures. For example, the battery pack 10 can also include a busbar component for realizing electrical connection between the multiple battery cells 11.

[0072] Each battery cell 11 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 11 may be flat, rectangular, or in other shapes.

[0073] In the battery pack 10, the liquid cooling plate assembly 20 can be arranged between the multiple battery cells 11 and the bottom wall of the box body 12, or between the bottom wall of the box body 12 and the bottom protective plate, or between the multiple battery cells 11 and the cover plate 13 of the box body 12, or between two adjacent battery cells 11, to provide heat exchange for the multiple battery cells 11.

[0074] Reference Figure 3 As shown, Figure 3 This is a three-dimensional diagram of the cooperation between the liquid cooling plate assembly 20 and the battery cell 11 in some embodiments of the present invention, such as Figure 3 As shown, the liquid cooling plate assembly 20 includes a plurality of liquid cooling plates 21 , a plurality of current collectors 22 , a plurality of connecting pipes 23 and a sealing member 24 .

[0075] The battery cell 11 is located between two adjacent liquid cooling plates 21, which are used to heat or dissipate heat for the battery cell 11. The liquid cooling plate 21 is connected to the current collector 22. There is a liquid cooling channel in the liquid cooling plate 21. Specifically, the shape of the liquid cooling channel is various, for example, "U" type, "return" type or "S" type. Optionally, the liquid cooling plate 21 also includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the current collector 22 for the inlet and outlet of the heat exchange medium. The liquid cooling plate 21 can be made of a material with a certain hardness and strength (such as stainless steel). In this way, the liquid cooling plate 21 is not easy to deform when the battery cell 11 is squeezed and collided, so that the battery cell 11 can have a higher structural strength and the safety performance can also be improved. The material of the liquid cooling plate 21 can be various, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0076] Each current collector 22 is an integrally formed structure, which can increase the structural strength of the current collector 22. The current collector 22 includes a main body 221 and a waterway connector 222. The waterway connector 222 is arranged on both sides of the main body 221. The main body 221 has a slot 2213 with an opening facing the liquid cooling plate 21. The end of the liquid cooling plate 21 is inserted into the slot 2213 to connect the liquid cooling plate 21 with the current collector 22. The waterway connector 222 can be a hollow round tube, a square tube or a flat tube. The material of the current collector 22 can be an injection molded part, which can reduce the cost of the current collector 22. The injection molded part includes an outer injection layer and an inner injection layer. The outer injection layer covers the outer surface of the inner injection layer. The outer injection layer has a strong strength and is not easily deformed when the battery pack 10 is hit, which can improve the safety performance of the current collector 22; the inner injection layer has a weak strength, which is convenient for the connecting tube 23 to be inserted into the waterway connector 222 through interference. The material of the liquid cooling plate 21 includes but is not limited to: nylon, plastic, etc.

[0077] The two ends of the connecting pipe 23 are respectively connected to the waterway joints 222 of the two adjacent current collectors 22, and the end of the connecting pipe 23 is inserted into the waterway joint 222 through interference fit, and the waterway joint 222 has a first positioning portion 2221, the first positioning portion 2221 is a positioning groove surrounding the outer surface of the connecting pipe 23, and both ends of the connecting pipe 23 have a second positioning portion 231 that is positioned and matched with the first positioning portion 2221, and the second positioning portion 231 is a positioning protrusion 232 surrounding the inner surface of the connecting pipe 23, which is used to locate the assembly position of the connecting pipe 23 and the waterway joint 222. The connecting pipe 23 is an integrally formed metal pipe, which is not easy to deform when the connecting pipe 23 is squeezed and collided, and the safety performance can also be improved. The material of the connecting pipe 23 can be various, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0078] The seal 24 is used to seal the assembly gap between the liquid cooling plate 21 and the slot 2213 . The seal 24 includes a sealant or a sealing strip to prevent the heat exchange medium from leaking from the assembly gap between the liquid cooling plate 21 and the slot 2213 .

[0079] Reference below Figure 3-Figure 14 A liquid cooling plate assembly 20 according to an embodiment of the first aspect of the present invention is described. Figure 3 is a three-dimensional diagram of the cooperation between the liquid cooling plate assembly 20 and the battery cell 11 according to an embodiment of the utility model. Figure 4 yes Figure 3 The top view of the liquid cooling plate assembly 20 and the battery cell 11 shown in FIG. Figure 5 yes Figure 3 The front view of the liquid cooling plate assembly 20 and the battery cell 11 shown in FIG. Figure 6 2 is a schematic diagram of the cooperation between the liquid cooling plate 21, the current collector 22 and the battery cell 11 according to an embodiment of the utility model. Figure 7is a three-dimensional diagram of the cooperation between the liquid cooling plate 21 and the current collector 22 according to an embodiment of the utility model. Figure 8 yes Figure 7 The front view of the liquid cooling plate 21 and the current collector 22 shown in FIG. Fig. 9 yes Figure 7 The top view of the liquid cooling plate 21 and the current collector 22 shown in FIG. Fig.10 yes Figure 7 The side view of the liquid cooling plate 21 and the current collector 22 shown in FIG. Fig.11 is along Fig.10 The cross-sectional view along the AA line. Fig.12 is a three-dimensional diagram of a connecting pipe 23 according to an embodiment of the utility model, Fig.13 yes Fig.12 The front view of the connecting pipe 23 shown in FIG. Fig.14 yes Fig.12 23 is shown in FIG.

[0080] The present utility model embodiment provides a liquid cooling plate assembly 20, such as Figure 4-Figure 6 As shown, the liquid cooling plate assembly 20 includes: a plurality of liquid cooling plates 21, which are arranged side by side and spaced apart, the battery cell 11 is located between two adjacent liquid cooling plates 21, and a liquid cooling flow channel is provided in the liquid cooling plate 21; a plurality of current collectors 22, which are arranged one by one corresponding to the plurality of liquid cooling plates 21, and each current collector 22 is an integrally formed structure, including a main body 221 and water channel joints 222 arranged on both sides of the main body 221, the main body 221 is connected to the end of the liquid cooling plate 21, and the main body 221 has a guide flow channel 223 connected to the liquid cooling flow channel; a connecting pipe 23, and the two ends of the connecting pipe 23 are respectively connected to the water channel joints 222 of the two adjacent liquid cooling plates 21.

[0081] Specifically, the liquid cooling plate assembly 20 is used to dissipate heat or heat the battery cell 11. The liquid cooling plate assembly 20 includes a plurality of liquid cooling plates 21. The liquid cooling plate 21 is located between two adjacent battery cells 11. The liquid cooling plate 21 has a liquid cooling channel, and the liquid cooling channel has a heat exchange medium. When the battery cell 11 needs to be cooled, the temperature of the battery cell 11 is higher than the temperature of the heat exchange medium, the heat of the battery cell 11 can be transferred to the heat exchange medium, the heat exchange medium can dissipate heat for the battery cell 11, and the heat exchange medium after heat exchange with the battery cell 11 can flow out of the liquid cooling plate 21 through the liquid cooling channel; when the battery cell 11 needs to be heated, the temperature of the battery cell 11 is lower than the temperature of the heat exchange medium, the heat of the heat exchange medium can be transferred to the battery cell 11, the heat exchange medium can heat the battery cell 11, and the heat exchange medium after heat exchange with the battery cell 11 can flow out of the liquid cooling plate 21 through the liquid cooling channel. For example, the heat exchange medium can be water.

[0082] The liquid cooling plate assembly 20 also includes a plurality of current collectors 22, which are arranged one by one with the plurality of liquid cooling plates 21, and one current collector 22 corresponds to one liquid cooling plate 21. Each current collector 22 is an integrally formed structure, including a main body 221 and a waterway joint 222, the waterway joint 222 is arranged on both sides of the main body 221, and the waterway joint 222 and the main body 221 are integrally formed, which can increase the structural strength of the current collector 22; it can also increase the sealing of the connection between the waterway joint 222 and the main body 221, and when the heat exchange medium flows in the current collector 22, it is not easy to leak out from the connection between the waterway joint 222 and the main body 221; it can also save the process of installing the waterway joint 222 on the main body 221, thereby improving the assembly efficiency of the current collector 22.

[0083] The main body 221 is connected to the end of the liquid cooling plate 21, and has a guide channel 223 inside the main body 221. The guide channel 223 is connected to the liquid cooling channel. The heat exchange medium in the guide channel 223 can flow into the liquid cooling channel of the liquid cooling plate 21, and the heat exchange medium in the liquid cooling channel can also flow into the guide channel 223.

[0084] In addition, a liquid inlet and a liquid outlet may be provided at the end of the liquid cooling plate 21 close to the current collector 22 , wherein the liquid inlet is used to connect the flow guide channel 223 with the liquid cooling channel, and the liquid outlet is also used to connect the flow guide channel 223 with the liquid cooling channel.

[0085] Optionally, the liquid cooling plate 21 has an S-shaped liquid cooling channel, and a liquid inlet and a liquid outlet are provided on the liquid cooling plate 21. The heat exchange medium in the guide channel 223 can flow into the liquid cooling channel through the liquid inlet, and the heat exchange medium flows in the liquid cooling channel to exchange heat with the battery cell 11, and the heat exchange medium after heat exchange flows into the guide channel 223 through the liquid outlet.

[0086] Optionally, the liquid cooling plate 21 has a plurality of U-shaped liquid cooling channels, and the liquid cooling plate 21 is provided with a plurality of liquid inlets and a plurality of liquid outlets, the number of liquid cooling channels is equal to the number of liquid inlets and liquid outlets and corresponds one to one, and each liquid cooling channel corresponds to a liquid inlet and a liquid outlet. The heat exchange medium in the guide channel 223 can flow into the corresponding liquid cooling channel through the liquid inlet, and after heat exchange with the battery cell 11, it flows into the guide channel 223 through the corresponding liquid outlet.

[0087] For example, the main body 221 may include a connecting plate 2211 and a connecting portion 2212 connected to one end of the connecting plate 2211, the connecting plate 2211 is connected to the end of the liquid cooling plate 21, water channel joints 222 are provided on both sides of the connecting portion 2212, and a guide channel 223 is defined in the connecting portion 2212. In the related art, a collector 22 is provided at one end of the liquid cooling plate 21, and the collector 22 has two spaced connecting portions 2212, the channel of one connecting portion 2212 is used to communicate with the liquid inlet of the liquid cooling channel, and the channel of the other connecting portion 2212 is used to communicate with the liquid outlet of the liquid cooling channel. Alternatively, a collector 22 is provided at each end of a liquid cooling plate 21, the guide channel 223 of one collector 22 is used to communicate with the liquid inlet of the liquid cooling channel, and the guide channel 223 of the other collector 22 is used to communicate with the liquid outlet of the liquid cooling channel. Compared with the related art, the present application can reduce the space occupied by the current collector 22, thereby saving the space occupied by the battery pack 10.

[0088] The two ends of the connecting tube 23 are respectively connected to the waterway connectors 222 of the two adjacent current collectors 22, so as to connect the two adjacent current collectors 22. For example, both ends of the connecting tube 23 can be installed in the waterway connector 222; for another example, both ends of the connecting tube 23 can be covered on the outside of the waterway connector 222; for another example, one end of the connecting tube 23 can be installed in the waterway connector 222, and the other end of the connecting tube 23 can be covered on the outside of the waterway connector 222.

[0089] The heat exchange medium flowing out of the guide channel 223 of one current collector 22 can flow into the guide channel 223 of an adjacent current collector 22 through the connecting tube 23, and then flow into the liquid cooling channel of the liquid cooling plate 21 through the guide channel 223 to exchange heat with the battery cell 11; after the heat exchange is completed, it flows into the guide channel 223 of the current collector 22 through the liquid cooling channel, and then flows to the connecting tube 23 through the guide channel 223 to flow into the guide channel 223 of the adjacent current collector 22.

[0090] According to the liquid cooling plate assembly 20 of the embodiment of the utility model, it includes multiple liquid cooling plates 21 and multiple current collectors 22, each of the current collectors 22 is an integrally formed structure, the current collector 22 includes a main body 221 and a water channel joint 222, the water channel joint 222 and the main body 221 are integrally formed to form the current collector 22, which can increase the structural strength of the current collector 22, and can also increase the sealing of the connection between the main body 221 and the water channel joint 222, and can also omit the process of installing the water channel joint 222 on the main body 221, thereby improving the assembly efficiency of the current collector 22.

[0091] According to some embodiments of the present invention, Figure 7-Figure 11As shown, the main body 221 has a slot 2213 opening toward the liquid cooling plate 21 , and the end of the liquid cooling plate 21 is inserted into the slot 2213 . The liquid cooling plate assembly 20 also includes a seal 24 , which is used to seal the assembly gap between the liquid cooling plate 21 and the slot 2213 .

[0092] A slot 2213 is formed at one end of the main body 221 facing the liquid cooling plate 21, and the opening of the slot 2213 faces the liquid cooling plate 21. The end of the liquid cooling plate 21 is installed in the slot 2213 of the main body 221 through the opening of the slot 2213, so as to achieve the connection between the liquid cooling plate 21 and the main body 221. Specifically, a slot 2213 is formed at one end of the connecting plate 2211 of the main body 221 facing the liquid cooling plate 21.

[0093] Inserting the end of the liquid cooling plate 21 into the slot 2213 can increase the connection area between the liquid cooling plate 21 and the main body 221, and increase the connection strength between the liquid cooling plate 21 and the main body 221. For example, the end of the liquid cooling plate 21 can be interference-fitted into the slot 2213 of the main body 221, which can increase the connection stability between the liquid cooling plate 21 and the main body 221.

[0094] The above-mentioned liquid inlet and liquid outlet are arranged at the end of the liquid cooling plate 21 close to the main body 221. Inserting the end of the liquid cooling plate 21 into the slot 2213 can also increase the sealing of the liquid inlet and liquid outlet, thereby reducing the risk of leakage of the heat exchange medium from the connection between the liquid cooling plate 21 and the main body 221.

[0095] The liquid cooling plate assembly 20 also includes a seal 24, which is used to seal the assembly gap between the liquid cooling plate 21 and the slot 2213. On the one hand, the stability of the connection between the liquid cooling plate 21 and the main body 221 can be further increased, and the risk of the liquid cooling plate 21 falling off the main body 221 is reduced; on the other hand, the sealing between the liquid cooling plate 21 and the main body 221 is further increased, and the risk of heat exchange medium leaking from the assembly gap between the liquid cooling plate 21 and the slot 2213 is reduced.

[0096] Optionally, the sealing member 24 may include a sealant, and the sealant may be applied to the assembly gap between the liquid cooling plate 21 and the slot 2213 , so that a gap is unlikely to appear between the liquid cooling plate 21 and the slot 2213 .

[0097] Optionally, the seal 24 may include a sealing strip, which may be interference-fitted in the assembly gap between the liquid cooling plate 21 and the slot 2213. The sealing strip is used to seal the assembly gap between the liquid cooling plate 21 and the slot 2213, which may facilitate the removal and installation of the current collector 22 and the liquid cooling plate 21 during the later repair or maintenance of the liquid cooling plate assembly 20.

[0098] In this embodiment, by providing the slot 2213 and the seal 24, the liquid cooling plate 21 and the main body 221 can be connected, thereby increasing the connection strength between the liquid cooling plate 21 and the main body 221; the assembly gap between the liquid cooling plate 21 and the slot 2213 can also be sealed to prevent the heat exchange medium from leaking from the assembly gap between the liquid cooling plate 21 and the slot 2213.

[0099] According to some embodiments of the present invention, Figure 7 As shown, the seal 24 comprises a sealant.

[0100] The assembly gap between the liquid cooling plate 21 and the slot 2213 is sealed with a sealant, which can make the sealing method between the liquid cooling plate 21 and the slot 2213 simple and low in cost. For example, the bursting pressure of the sealant is greater than 8 bar. When the battery pack 10 is hit, since the assembly gap between the liquid cooling plate 21 and the slot 2213 is sealed with a sealant, a gap is not likely to appear between the liquid cooling plate 21 and the slot 2213.

[0101] In this embodiment, by providing the sealing member 24 including a sealant, the sealing method between the liquid cooling plate 21 and the slot 2213 can be simple and low in cost.

[0102] According to some embodiments of the present invention, Figure 3-Figure 4 As shown, the end of the connecting pipe 23 is inserted into the waterway joint 222 by interference fit.

[0103] The end of the connecting pipe 23 is inserted into the waterway joint 222 with an interference fit, which can increase the reliability of the connecting pipe 23 being inserted into the waterway joint 222. When the liquid cooling plate assembly 20 shakes, the connecting pipe 23 is not easy to be separated from the waterway joint 222. The end of the connecting pipe 23 is inserted into the waterway joint 222 with an interference fit, which can also increase the sealing of the connection between the connecting pipe 23 and the waterway joint 222, and reduce the risk of leakage of the heat exchange medium from the connection between the connecting pipe 23 and the waterway joint 222.

[0104] In addition, the interference fit between the connecting pipe 23 and the waterway connector 222 may be 3 mm, so that the connecting pipe 23 can be installed in the waterway connector 222 and the reliability of the connecting pipe 23 being inserted into the waterway connector 222 can be increased.

[0105] For example, sealant may be applied to the connection between the connecting pipe 23 and the waterway joint 222 to further increase the sealing performance of the connecting pipe 23 and the waterway joint 222 , and may also further increase the connection strength between the connecting pipe 23 and the waterway joint 222 .

[0106] In this embodiment, the end of the connecting pipe 23 is inserted into the water channel joint 222 through interference fit, thereby increasing the reliability of the connection between the connecting pipe 23 and the water channel joint 222 .

[0107] According to some embodiments of the present invention, Figure 7 , Figure 12-13 As shown, the water channel joint 222 has a first positioning portion 2221 therein, and both ends of the connecting pipe 23 have a second positioning portion 231 that is positioned and matched with the first positioning portion 2221 .

[0108] The waterway connector 222 has a first positioning portion 2221, and both ends of the connecting pipe 23 have second positioning portions 231, and the second positioning portion 231 is positioned and matched with the first positioning portion 2221. When the connecting pipe 23 is installed in the waterway connector 222, the second positioning portion 231 is positioned and matched with the first positioning portion 2221, which can play a role in determining the assembly position of the connecting pipe 23 inserted in the waterway connector 222, and can improve the accuracy of the assembly position of the connecting pipe 23 inserted in the waterway connector 222.

[0109] The first positioning portion 2221 may be provided on the inner surface of the waterway connector 222, for example, the first positioning portion 2221 may be located at a position 3 mm from the inner surface of the waterway connector 222 to the port of the waterway connector 222. The second positioning portion 231 may be provided on the outer surface of the connecting pipe 23, for example, the second positioning portion 231 may be located at a position 5 mm from the outer surface of the connecting pipe 23 to the port of the connecting pipe 23, that is, the waterway connector 222 may be inserted into the connecting pipe 23 at a distance of 8 mm from the port of the connecting pipe 23.

[0110] Both ends of the connecting pipe 23 have a second positioning portion 231. For example, one second positioning portion 231 may be located at a position 5 mm from the outer surface of the connecting pipe 23 to one end of the connecting pipe 23, and the other second positioning portion 231 may be located at a position 5 mm from the outer surface of the connecting pipe 23 to the other end of the connecting pipe 23. The connecting pipe 23 is used to connect two adjacent waterway connectors 222. One second positioning portion 231 is positioned and matched with the first positioning portion 2221 in one waterway connector 222, and the other second positioning portion 231 is positioned and matched with the first positioning portion 2221 in the other waterway connector 222.

[0111] For example, a third positioning portion is also provided in the waterway connector 222, and the third positioning portion abuts against the end of the connecting pipe 23 to limit the installation position of the connecting pipe 23 in the waterway connector 222. The connecting pipe 23 is used to connect two adjacent waterway connectors 222, one connecting pipe 23 abuts against one end of the third positioning portion, and the other connecting pipe 23 abuts against the other end of the third positioning portion, which can reduce the risk of hard contact between the ends of the two connecting pipes 23 in the same water pipe connector. Under the joint action of the third positioning portion, the first positioning portion 2221 and the second positioning portion 231, the accuracy of the installation position of the connecting pipe 23 in the waterway connector 222 can be further improved.

[0112] In this embodiment, by setting the first positioning portion 2221 and the second positioning portion 231, the first positioning portion 2221 and the second positioning portion 231 are positioned and matched to determine the assembly position of the connecting pipe 23 inserted into the water channel connector 222, so as to improve the accuracy of the assembly position of the connecting pipe 23 inserted into the water channel connector 222.

[0113] According to some embodiments of the present invention, Figure 7 , Figure 12-13 As shown, the first positioning portion 2221 is a positioning groove, and the second positioning portion 231 is a positioning protrusion 232 that is positioned and matched with the positioning groove.

[0114] The first positioning portion 2221 is a positioning groove provided on the inner surface of the waterway connector 222, and the second positioning portion 231 is a positioning protrusion 232 provided on the outer surface of the connecting pipe 23. When the connecting pipe 23 is installed in the waterway connector 222, the positioning protrusion 232 can be located in the positioning groove to limit the installation position of the connecting pipe 23 in the waterway connector 222. Providing the positioning groove on the inner surface of the waterway connector 222 can simplify the setting of the first positioning portion 2221; and providing the positioning protrusion 232 on the outer surface of the connecting pipe 23 can simplify the setting of the second positioning portion 231.

[0115] The installation position of the connecting pipe 23 on the waterway joint 222 is fixed by matching the positioning protrusion 232 with the positioning groove, which can simplify the method of determining the installation position of the connecting pipe 23 on the waterway joint 222, make it easier to implement during assembly, and increase the accuracy.

[0116] Optionally, a plurality of positioning protrusions 232 may be provided, and the plurality of positioning protrusions 232 may be arranged at intervals along the circumference of the outer surface of the connecting pipe 23, or the plurality of positioning protrusions 232 may be arranged at intervals along the axial direction of the outer surface of the connecting pipe 23. Correspondingly, a plurality of positioning grooves may be provided, and the plurality of positioning grooves may be arranged at intervals along the circumference of the inner surface of the waterway connector 222, or the plurality of positioning grooves may be arranged at intervals along the axial direction of the inner surface of the waterway connector 222, and the number of the positioning grooves is equal to the number of the positioning protrusions 232 and corresponds one to one.

[0117] Optionally, the positioning protrusion 232 may be in the form of a ring surrounding the outer surface of the connecting pipe 23 , and correspondingly, the positioning groove may be in the form of a ring surrounding the inner surface of the waterway connector 222 , and the positioning protrusion 232 and the positioning groove are matched.

[0118] In this embodiment, by providing the positioning protrusion 232 and the positioning groove, the method of determining the installation position of the connecting pipe 23 on the water channel joint 222 can be simplified, which is easier to implement during assembly and has higher accuracy.

[0119] According to some embodiments of the present invention, Figure 7 As shown, the positioning groove is annular and surrounds the inner surface of the waterway connector 222 .

[0120] like Figure 7 As shown, the positioning groove is annular and surrounds the inner surface of the waterway connector 222. The positioning groove extends continuously in the circumferential direction of the inner surface of the waterway connector 222 and can be integrally formed on the inner surface of the waterway connector 222, which can simplify the processing technology of the positioning groove.

[0121] In this embodiment, the positioning groove is set to be a ring shape surrounding the inner surface of the water channel joint 222, so that the processing technology of the positioning groove can be simplified.

[0122] According to some embodiments of the present invention, Figure 12-13 As shown, the positioning protrusion 232 is annular and matches the annular positioning groove.

[0123] The positioning protrusion 232 is annular and surrounds the outer surface of the connecting tube 23, and the annular positioning protrusion 232 is matched with the annular positioning groove. The positioning protrusion 232 extends continuously in the circumferential direction of the outer surface of the connecting tube 23, and can be integrally formed on the outer surface of the connecting tube 23, which can simplify the processing technology of the positioning protrusion 232.

[0124] In this embodiment, the positioning protrusion 232 is configured to be a ring shape surrounding the outer surface of the connecting pipe 23 , so that the processing technology of the positioning protrusion 232 can be simplified.

[0125] According to some embodiments of the present invention, Figure 12-14 As shown, the connecting pipe 23 is an integrally formed metal pipe, and the positioning protrusion 232 is constructed by protruding outward from the surface of the metal pipe.

[0126] Specifically, the metal tube and the positioning protrusion 232 are integrally formed, which reduces the steps of installing the positioning protrusion 232 on the metal tube, thereby improving the production efficiency of the connecting tube 23 and reducing the production cost of the connecting tube 23; it can also increase the strength of the positioning protrusion 232 installed on the metal tube.

[0127] For example, the connecting pipe 23 may be made of a variety of materials, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0128] In this embodiment, the metal tube and the positioning protrusion 232 are integrally formed, which reduces the steps of installing the positioning protrusion 232 on the metal tube, thereby improving the production efficiency of the connecting tube 23 and reducing the production cost of the connecting tube 23; it can also increase the strength of the positioning protrusion 232 installed on the metal tube.

[0129] According to some embodiments of the present invention, Figure 3-Figure 11As shown, the current collector 22 is an integrally-injected molded part.

[0130] Specifically, the current collector 22 is an integrally-injected molded part, which can reduce the production cost of the current collector 22. For example, the material of the current collector 22 can include nylon, and the current collector 22 is integrally-injected from nylon.

[0131] In the related art, the current collector 22 is a metal part, and the material can be: copper, iron, aluminum, stainless steel, aluminum alloy, etc. The current collector 22 of the present application is an injection molded part, which can reduce the cost of the current collector 22 compared with the related art.

[0132] In this embodiment, the current collector 22 is configured as an integrally-injected molded part, so that the production cost of the current collector 22 can be reduced.

[0133] According to some embodiments of the present invention, Figure 3-Figure 11 As shown, the current collector 22 includes an outer injection layer and an inner injection layer, the outer injection layer covers the outer surface of the inner injection layer, and the hardness of the outer injection layer is greater than that of the inner injection layer.

[0134] Specifically, the current collector 22 includes two injection molding layers, the outer layer is the outer injection molding layer, and the inner layer is the inner injection molding layer. The outer injection molding layer covers the outer surface of the inner injection molding layer, and the inner injection molding layer is located on the inner surface of the outer injection molding layer. The hardness of the outer injection molding layer is greater than the hardness of the inner injection molding layer. When the current collector 22 is hit, the hardness of the outer injection molding layer is harder than that of the inner injection molding layer, so the risk of deformation of the current collector 22 can be reduced, and the safety of the current collector 22 can be improved.

[0135] The two ends of the connecting tube 23 are respectively connected to the waterway joints 222 of the two adjacent current collectors 22, and the end of the connecting tube 23 is interference fit in the waterway joint 222. Since the inner injection molding layer is softer than the outer injection molding layer, the end of the connecting tube 23 can be interference fit in the waterway joint 222, which can increase the sealing performance between the end of the connecting tube 23 and the waterway joint 222.

[0136] In this embodiment, the current collector 22 includes an outer injection molding layer and an inner injection molding layer. The outer injection molding layer covers the outer surface of the inner injection molding layer. The hardness of the outer injection molding layer is greater than that of the inner injection molding layer. When the current collector 22 is hit, the risk of deformation of the current collector 22 can be reduced, and the safety of the current collector 22 can be improved. It can also facilitate the interference fit of the end of the connecting tube 23 in the waterway joint 222 to increase the sealing between the end of the connecting tube 23 and the waterway joint 222.

[0137] According to some embodiments of the present invention, Figure 6-Figure 14As shown, the water channel joint 222 is a hollow round tube, square tube or flat tube; the connecting tube 23 is a hollow round tube, square tube or flat tube.

[0138] When the water channel joint 222 is a hollow round tube, correspondingly, the connecting pipe 23 is a hollow round tube.

[0139] When the water channel joint 222 is a hollow square tube, correspondingly, the connecting pipe 23 is a hollow square tube.

[0140] When the water channel connector 222 is a hollow flat tube, correspondingly, the connecting tube 23 is a hollow flat tube.

[0141] Among them, the round tube, square tube or flat tube is a hollow tube, which is relatively light in weight when the bending and torsional strengths are the same. By setting the water channel joint 222 as a round tube, square tube or flat tube, the overall weight of the current collector 22 can be reduced, and then the overall weight of the liquid cooling plate assembly 20 can be reduced, and the battery pack 10 can be made lighter. At the same time, the round tube has a simple structure, is easy to make, and has a low cost, so the production cost of the current collector 22 can also be reduced; in addition, the upper and lower surfaces of the square tube or flat tube are both flat planes, and then the water channel joint 222 is a square tube or a flat tube, which can increase the installation stability of the current collector 22.

[0142] In this embodiment, the water channel joint 222 is configured as a hollow round tube, square tube or flat tube, and the connecting tube 23 is configured as a hollow round tube, square tube or flat tube. When the bending and torsional strengths are the same, the mass is relatively light, which can reduce the overall weight of the collector 22, and further reduce the overall weight of the liquid cooling plate assembly 20, thereby improving the lightweight of the battery pack 10.

[0143] According to some embodiments of the present invention, Figure 3 , Figure 6-Figure 11 As shown, part of the main body 221 extends in a direction away from the liquid cooling plate 21 to form a connecting portion 2212 , and water channel joints 222 are provided on both sides of the connecting portion 2212 .

[0144] Part of the main body 221 extends in a direction away from the liquid cooling plate 21 to construct a connecting portion 2212 , which can reduce the space occupied by the current collector 22 and further save the space occupied by the battery pack 10 .

[0145] In the related art, the current collector 22 has two spaced-apart connection parts 2212, the flow channel of one connection part 2212 is used to communicate with the liquid inlet of the liquid cooling channel, and the flow channel of the other connection part 2212 is used to communicate with the liquid outlet of the liquid cooling channel. Alternatively, a current collector 22 is provided at each end of a liquid cooling plate 21, the flow guide channel 223 of one current collector 22 is used to communicate with the liquid inlet of the liquid cooling channel, and the flow guide channel 223 of the other current collector 22 is used to communicate with the liquid outlet of the liquid cooling channel. Compared with the related art, the present application can reduce the space occupied by the current collector 22, thereby saving the space occupied by the battery pack 10.

[0146] In this embodiment, a portion of the main body 221 is extended in a direction away from the liquid cooling plate 21 to construct a connecting portion 2212. Water channel joints 222 are provided on both sides of the connecting portion 2212, which can reduce the space occupied by the current collector 22 and thus save the space occupied by the battery pack 10.

[0147] The cooling system according to the second embodiment of the utility model includes the liquid cooling plate assembly 20 according to the first embodiment of the utility model.

[0148] According to the cooling system of the embodiment of the utility model, by providing the liquid cooling plate assembly 20 of the first embodiment, the sealing performance of the cooling system can be improved and the cost of the cooling system can be reduced.

[0149] The battery pack 10 according to the embodiment of the third aspect of the utility model includes the cooling system according to the embodiment of the second aspect of the utility model.

[0150] According to the battery pack 10 of the embodiment of the utility model, by providing the cooling system of the above-mentioned second aspect embodiment, the production cost and occupied space of the battery pack 10 can be reduced.

[0151] The electric device according to the embodiment of the fourth aspect of the utility model includes the battery pack 10 according to the embodiment of the third aspect of the utility model.

[0152] According to the electric equipment of the embodiment of the utility model, the overall performance of the electric equipment is improved by providing the battery pack 10 of the fourth embodiment.

[0153] The following will refer to Figure 2-Figure 14 A liquid cooling plate assembly 20 and a battery pack 10 having the same according to a specific embodiment of the present invention are described.

[0154] The battery pack 10 includes a plurality of battery cells 11 and a liquid cooling plate assembly 20. The liquid cooling plate assembly 20 includes a plurality of liquid cooling plates 21 and a plurality of current collectors 22. The plurality of current collectors 22 are arranged one by one corresponding to the plurality of liquid cooling plates 21. The liquid cooling plate 21 is located between two adjacent battery cells 11. The liquid cooling plate 21 has a liquid cooling channel therein, and the liquid cooling channel has a heat exchange medium therein.

[0155] Each current collector 22 is an integrally formed structure, including a main body 221 and waterway joints 222 arranged on both sides of the main body 221. The waterway joints 222 are hollow round tubes, square tubes or flat tubes. The main body 221 is connected to the end of the liquid cooling plate 21, and the main body 221 has a guide channel 223 connected to the liquid cooling channel. The main body 221 has a slot 2213 with an opening facing the liquid cooling plate 21, and the end of the liquid cooling plate 21 is inserted into the slot 2213.

[0156] The current collector 22 is an integrally injection-molded part, and the current collector 22 includes an outer injection-molded layer and an inner injection-molded layer. The outer injection-molded layer covers the outer surface of the inner injection-molded layer. The hardness of the outer injection-molded layer is greater than that of the inner injection-molded layer. When the current collector 22 is hit, the risk of deformation of the current collector 22 can be reduced, and the safety of the current collector 22 can be improved.

[0157] The liquid cooling plate assembly 20 also includes a connecting pipe 23, which is an integrally formed metal pipe, and is a hollow round pipe, square pipe or flat pipe. The two ends of the connecting pipe 23 are respectively connected to the waterway joints 222 of the two adjacent current collectors 22, and the ends of the connecting pipe 23 are inserted into the waterway joints 222 by interference fit. The waterway joint 222 has a first positioning portion 2221, which is an annular positioning groove surrounding the inner surface of the waterway joint 222; both ends of the connecting pipe 23 have a second positioning portion 231 that is positioned and matched with the first positioning portion 2221, and the second positioning portion 231 is an annular positioning protrusion 232 that is adapted to the annular positioning groove, and the positioning protrusion 232 surrounds the outer surface of the connecting pipe 23.

[0158] The liquid cooling plate assembly 20 further includes a sealant 24 , which includes a sealant for sealing the assembly gap between the liquid cooling plate 21 and the slot 2213 to prevent the heat exchange medium from leaking from the assembly gap between the liquid cooling plate 21 and the slot 2213 .

[0159] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0160] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid cooling plate assembly (20), characterized in that: include: A plurality of liquid cooling plates (21) are arranged side by side and spaced apart, the battery cell (11) is located between two adjacent liquid cooling plates (21), and a liquid cooling channel is provided in the liquid cooling plate (21); A plurality of current collectors (22) are arranged in one-to-one correspondence with the plurality of liquid cooling plates (21); each of the current collectors (22) is an integrally formed structure, comprising a main body (221) and water channel joints (222) arranged on both sides of the main body (221); the main body (221) is connected to the end of the liquid cooling plate (21); and the main body (221) has a guide channel (223) in communication with the liquid cooling channel; A connecting pipe (23), both ends of which are respectively connected to the water channel joints (222) of two adjacent fluid collector (22) liquid cooling plates (21).

2. The liquid cooling plate assembly (20) according to claim 1, characterized in that: The main body (221) has a slot (2213) opening toward the liquid cooling plate (21), and an end of the liquid cooling plate (21) is inserted into the slot (2213). The liquid cooling plate assembly (20) further includes a sealing member (24), and the sealing member (24) is used to seal an assembly gap between the liquid cooling plate (21) and the slot (2213).

3. The liquid cooling plate assembly (20) according to claim 2, characterized in that: The sealing member (24) comprises a sealing glue.

4. The liquid cooling plate assembly (20) according to claim 1, characterized in that: The end of the connecting pipe (23) is interference-fitted into the water channel joint (222).

5. The liquid cooling plate assembly (20) according to claim 4, characterized in that: The water channel joint (222) has a first positioning portion (2221) therein, and both ends of the connecting pipe (23) have second positioning portions (231) that are positioned and matched with the first positioning portion (2221).

6. The liquid cooling plate assembly (20) according to claim 5, characterized in that: The first positioning portion (2221) is a positioning groove, and the second positioning portion (231) is a positioning protrusion (232) that is positioned and matched with the positioning groove.

7. The liquid cooling plate assembly (20) according to claim 6, characterized in that: The positioning groove is in the form of a ring surrounding the inner surface of the water channel joint (222).

8. The liquid cooling plate assembly (20) according to claim 7, characterized in that: The positioning protrusion (232) is annular and matches the annular positioning groove.

9. The liquid cooling plate assembly (20) according to any one of claims 6 to 8, characterized in that: The connecting pipe (23) is an integrally formed metal pipe, and the positioning protrusion (232) is formed by protruding outward from the surface of the metal pipe.

10. The liquid cooling plate assembly (20) according to claim 1, characterized in that: The current collector (22) is an integrally injection-molded part.

11. The liquid cooling plate assembly (20) according to claim 10, characterized in that: The current collector (22) comprises an outer injection-molded layer and an inner injection-molded layer, wherein the outer injection-molded layer covers the outer surface of the inner injection-molded layer, and the hardness of the outer injection-molded layer is greater than the hardness of the inner injection-molded layer.

12. The liquid cooling plate assembly (20) according to claim 1, characterized in that: The water channel joint (222) is a hollow round tube, square tube or flat tube; The connecting pipe (23) is a hollow round pipe, square pipe or flat pipe.

13. The liquid cooling plate assembly (20) according to claim 1, characterized in that: Part of the main body (221) extends in a direction away from the liquid cooling plate (21) to form a connecting portion (2212), and the water channel joints (222) are provided on both sides of the connecting portion (2212).

14. A cooling system, characterized in that: The liquid cooling plate assembly (20) comprises the liquid cooling plate assembly (20) according to any one of claims 1 to 13.

15. A battery pack (10), characterized in that: Comprising the cooling system of claim 14.

16. An electrical equipment, characterized in that: Comprising the battery pack (10) as claimed in claim 15.

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