Cold plate, battery pack and electric equipment

Abstract

The invention relates to the technical field of batteries, and provides a cold plate, a battery pack and electric equipment.The cold plate comprises a cold plate body and a connector, the cold plate body comprises a plurality of sub-regions, region pipelines are arranged in the sub-regions, the connector is connected to one side of the cold plate body, the connector comprises a liquid inlet and a liquid outlet, and the liquid inlet is communicated with the sub-regions. The liquid inlets and the liquid outlets are communicated with the area pipelines in the sub-areas, liquid flow channels are formed between the liquid inlets and the liquid outlets, and the multiple sub-areas are arranged in the direction away from the connector. The area pipeline in each sub-area is communicated with the liquid inlet and the liquid outlet to form a liquid flow channel, and the number of shunting lines of the area pipelines arranged in each sub-area is in a first increasing trend along the arrangement direction of the sub-areas. According to the embodiment of the invention, the purpose of uniformly distributing liquid flow can be achieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cold plate, a battery pack and an electrical device. Background Art

[0002] The operating temperature range of the battery pack is an important indicator for judging the usage status of the battery pack. In order to ensure the safety, life and performance stability of the battery pack, the operating temperature of the battery pack should not be too high. Therefore, the battery pack is usually equipped with a cold plate to control the temperature of the battery pack by the flow of refrigerant in the cold plate.

[0003] At present, the cold plate usually adopts a uniform design concept. However, with the evaporation of the refrigerant liquid phase and the diversion of the flow channel to dissipate heat to different areas, the refrigerant flow distribution in different areas of the cold plate is uneven, which leads to differences in the heat dissipation effect of each area on the cold plate, making it difficult to achieve uniform heat dissipation of the battery pack. Summary of the invention

[0004] The present application provides a cold plate, a battery pack and an electrical device, which can achieve the purpose of uniform distribution of liquid flow.

[0005] A first aspect of the present application provides a cold plate, comprising:

[0006] A cold plate body, the cold plate body comprising a plurality of sub-areas, wherein regional pipelines are arranged in the sub-areas;

[0007] and a joint, the joint being connected to one side of the cold plate body, the joint comprising a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet being connected to a regional pipeline in the sub-region, and a plurality of the sub-regions being arranged in a direction away from the joint,

[0008] The regional pipeline in each of the sub-regions is respectively connected to the liquid inlet and the liquid outlet to form a liquid flow channel, and the number of branch lines of the regional pipeline arranged in each of the sub-regions shows a first increasing trend along the arrangement direction of the sub-regions.

[0009] According to the cold plate described in the first aspect of the present application, in the direction away from the joint, the number of shunt lines of the regional pipelines arranged in each sub-area shows a first increasing trend, thereby being able to balance the problem of uneven shunt caused by different distances and differences in flow resistance, and by reasonably configuring the shunt lines of the regional pipelines in each sub-area, the cold plate can achieve the purpose of evenly distributing the liquid flow, and the heat dissipation effects of each sub-area on the cold plate are basically the same, which can avoid local overheating of the battery pack, achieve uniform heat dissipation of the battery pack, improve the temperature uniformity of the battery pack, and thus improve the overall performance of the battery pack.

[0010] In one possible implementation, the cold plate body is formed with a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet is located at one end of the liquid inlet pipeline, the liquid outlet is located at one end of the liquid outlet pipeline, and the multiple sub-areas are connected in parallel between the liquid inlet pipeline and the liquid outlet pipeline.

[0011] In a possible implementation manner, at least one partition is formed on the cold plate body, and a plurality of the sub-regions are connected in parallel within the partition.

[0012] In one possible implementation, the cold plate body is provided with a first partition, the first partition is provided with a plurality of sub-areas, the liquid inlet pipeline includes a first liquid inlet pipeline, the liquid outlet pipeline includes a first liquid outlet pipeline, and the plurality of sub-areas within the first partition are connected in parallel between the first liquid inlet pipeline and the first liquid outlet pipeline.

[0013] In a possible implementation, a plurality of first flow diversion nodes are provided on the first liquid inlet pipeline, and the number of the first flow diversion nodes is consistent with the number of the sub-regions in the first partition.

[0014] In a possible implementation, the regional pipelines in each of the sub-regions in the first partition include a first flow pipeline, X first-level inflow pipelines branched from the first flow branching node, and at least one first-level outflow pipeline connected to the first liquid outlet pipeline.

[0015] Wherein, X is a positive integer greater than or equal to 2.

[0016] In one possible implementation, the first circulation pipeline includes X first liquid flow inlets and at least one first confluence outlet, the first-level first inflow pipeline is correspondingly connected to the first liquid flow inlet, and the first-level first outflow pipeline is connected to the first confluence outlet, wherein, arranged in a direction away from the joint, the X in the sub-area shows a first increasing trend.

[0017] In one possible implementation, the first circulation pipeline includes X1 first liquid flow inlets and at least one first confluence outlet, the cold plate body is also formed with a connecting pipeline for connecting at least two of the first liquid flow inlets, the first-level first inflow pipeline is connected to the first liquid flow inlet through at least one connecting pipeline, and the first-level first outflow pipeline is connected to the first confluence outlet, and X1 is a positive integer greater than X, wherein, arranged in a direction away from the joint, X1 in the sub-area shows a first increasing trend.

[0018] In one possible implementation, a first-level first sub-dividing node is also provided on the first-level first inflow pipeline, the first-level first sub-dividing node is connected to the first diverting node, and a second-level first inflow pipeline is provided between the first-level first sub-dividing node and the first liquid flow inlet.

[0019] In a possible implementation, a first confluence node is provided on the first liquid outlet pipeline, and the number of the first confluence nodes is consistent with the number of the sub-areas in the first partition.

[0020] In one possible implementation, a first-level sub-confluence node is provided on the first-level first outflow pipeline, the first-level first sub-confluence node is connected to the first confluence node, and a second-level first outflow pipeline is provided between the first-level first sub-confluence node and the first flow pipeline.

[0021] In a possible implementation manner, a plurality of first flow dividing nodes are arranged on the first liquid inlet pipeline, and the number of the first flow dividing nodes is less than the number of the sub-regions in the first partition.

[0022] In a possible implementation, the number of the sub-areas in the first partition is n times the number of the first shunt nodes; the number of the sub-areas in the second partition is n times the number of the second shunt nodes.

[0023] Wherein, n is a positive integer greater than or equal to 2.

[0024] In a possible implementation, the regional pipelines in each of the sub-areas in the first partition include a first circulation pipeline, a first-level first inflow pipeline branched from the first flow branching node, Y second-level first inflow pipelines branched from each of the first-level first inflow pipelines, and at least one first-level first outflow pipeline connected to the first liquid outlet pipeline.

[0025] Wherein, Y is a positive integer greater than or equal to 2.

[0026] In one possible implementation, the first circulation pipeline includes Y first liquid flow inlets and at least one first confluence outlet, the secondary first inflow pipeline is correspondingly connected to the first liquid flow inlet, and the primary first outflow pipeline is connected to the first confluence outlet, wherein, arranged in a direction away from the joint, the Y in the sub-area shows a first increasing trend.

[0027] In one possible implementation, the first circulation pipeline includes Y1 first liquid flow inlets and at least one first confluence outlet, the cold plate body is also formed with a connecting pipeline for connecting at least two of the first liquid flow inlets, the secondary first inflow pipeline is connected to the first liquid flow inlet through at least one connecting pipeline, the primary first outflow pipeline is connected to the first confluence outlet, and Y1 is a positive integer greater than Y, wherein, arranged in a direction away from the joint, Y1 in the sub-area (22c) presents a first increasing trend.

[0028] In a possible implementation, a first-level first sub-dividing node is further provided on the first-level first inflow pipeline, and the second-level first inflow pipeline is connected between the first-level first sub-dividing node and the first circulation pipeline.

[0029] In one possible implementation, a secondary first sub-dividing node is also provided on the secondary first inflow pipeline, and the secondary first sub-dividing node is connected to the primary first sub-dividing node, and a tertiary first inflow pipeline is provided between the secondary first sub-dividing node and the first circulation pipeline.

[0030] In a possible implementation, the first liquid outlet pipeline is provided with first confluence nodes, and the number of the first confluence nodes is consistent with the number of the first diversion nodes.

[0031] In one possible implementation, a first-level sub-confluence node is provided on the first-level outflow pipeline, the first-level sub-confluence node is connected to the first confluence node, and a second-level first outflow pipeline is provided between the first-level sub-confluence node and the regional pipeline.

[0032] In a possible implementation, along the arrangement direction of the plurality of sub-regions, two adjacent sub-regions are connected to the same first bus node, and the first bus node is disposed adjacent to the sub-region close to the joint.

[0033] In one possible implementation, a secondary first sub-confluence node is provided on the secondary first outflow pipeline, the secondary first sub-confluence node is connected to the primary first sub-confluence node, and a tertiary first outflow pipeline is provided between the secondary first sub-confluence node and the regional pipeline.

[0034] In a possible implementation, along the arrangement direction of the plurality of sub-regions, two adjacent sub-regions are connected to the same first shunt node, and the first shunt node is disposed adjacent to the sub-region away from the joint.

[0035] In a possible implementation manner, the number of the sub-areas in the first partition is at least one more than the number of the first diversion nodes.

[0036] In one possible implementation, the first flow pipeline of each of the sub-areas includes two first sub-flow pipelines, each of the first sub-flow pipelines has the first liquid flow inlet, and the first confluence outlet is located between the first liquid flow inlets of the two first sub-flow pipelines.

[0037] In one possible implementation, the cold plate body also includes a second partition spaced apart along a first direction on one side of the first partition, a plurality of sub-areas are arranged in the second partition, the liquid inlet pipeline includes a second liquid inlet pipeline, the liquid outlet pipeline includes a second liquid outlet pipeline, the plurality of sub-areas in the second partition are connected in parallel between the second liquid inlet pipeline and the second liquid outlet pipeline, and the first direction is perpendicular to the direction in which the plurality of sub-areas are arranged.

[0038] In one possible implementation, a plurality of first flow diversion nodes are provided on the first liquid inlet pipeline, a plurality of second flow diversion nodes are provided on the second liquid inlet pipeline, a plurality of first flow confluence nodes are provided on the first liquid outlet pipeline, and a plurality of second flow confluence nodes are provided on the second liquid outlet pipeline.

[0039] In one possible implementation, an edge pipeline is further provided between the first liquid inlet pipeline and the second liquid inlet pipeline, and is provided around the first partition and / or the second partition, and the edge pipeline is connected between the liquid inlet and the liquid outlet.

[0040] In one possible implementation, the edge pipeline includes an edge inlet pipeline and an edge outflow pipeline, the edge inlet pipeline is arranged between the first liquid inlet pipeline and the second liquid inlet pipeline, and the edge outflow pipeline includes a first edge outflow pipeline and a second edge outflow pipeline, the first edge outflow pipeline is arranged at the edge of the first partition, and the second edge outflow pipeline is arranged at the edge of the second partition.

[0041] In a possible implementation, the edge inflow conduit includes a first edge inflow conduit and a second edge inflow conduit, and the first edge inflow conduit and the second edge inflow conduit are alternately arranged to form a turbulent structure that can block the liquid.

[0042] In a possible implementation, there are multiple spoiler structures, and the spoiler structures include a converging section and a diverting section.

[0043] In a possible implementation manner, a curved and circuitous section is provided on the first edge inflow pipeline and / or the second edge inflow pipeline.

[0044] In a possible implementation, the cold plate body is provided with module separation areas, the module separation areas are arranged in a crisscross pattern, and the liquid inlet pipeline and the liquid outlet pipeline are provided in the module separation areas.

[0045] In one possible implementation, the lengths of the flow paths of the plurality of liquid flow channels show a second increasing trend along the arrangement direction of the sub-regions; and / or the number of branch lines of the regional pipelines arranged in each of the sub-regions forms a first increasing trend that matches the second increasing trend.

[0046] In one possible implementation, the length of the first circulation pipeline shows a decreasing trend along the arrangement direction of the plurality of sub-regions, and / or the first circulation pipeline of each of the sub-regions includes at least one first sub-circulation pipeline, and the length of the first sub-circulation pipeline shows a decreasing trend along the arrangement direction of the sub-regions.

[0047] In one possible implementation, along the arrangement direction of the plurality of sub-areas, the diameter of the first circulation pipeline presents a third increasing trend, and / or the first circulation pipeline of each of the sub-areas includes at least one first sub-circulation pipeline, and along the arrangement direction of the sub-areas, the diameter of the first sub-circulation pipeline presents a third increasing trend.

[0048] In one possible implementation, along the arrangement direction of the plurality of sub-regions, the arrangement gaps of the first circulation pipelines present a fourth increasing trend, and / or, the first circulation pipeline of each of the sub-regions includes at least one first sub-circulation pipeline, and along the arrangement direction of the sub-regions, the arrangement gaps of the first sub-circulation pipelines present a fourth increasing trend.

[0049] In a possible implementation, the first flow pipeline includes a plurality of first sub-flow pipelines, and each of the first sub-flow pipelines forms a first liquid flow inlet.

[0050] A second aspect of the present application provides a battery pack, comprising the cold plate described in the first aspect.

[0051] A third aspect of the present application provides an electrical device, comprising the battery pack described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1A schematic diagram of the structure of a battery pack provided according to an embodiment of the present application is shown;

[0054] Figure 2 An exploded schematic diagram of a cold plate provided according to an embodiment of the present application is shown;

[0055] Figure 3 A schematic diagram of the pipeline arrangement of a cold plate provided according to an embodiment of the present application is shown;

[0056] Figure 4 Shows Figure 3 Pipeline layout diagram of the first sub-area;

[0057] Figure 5 Shows Figure 3 Pipeline layout diagram of the second sub-area;

[0058] Figure 6 Shows Figure 3 Pipeline layout diagram of the third sub-area;

[0059] Figure 7 Shows Figure 3 Pipeline layout diagram of the fourth sub-area;

[0060] Figure 8 Shows Figure 3 Piping layout diagram of the middle edge area.

[0061] Reference numerals:

[0062] 100-region pipeline; 110-first circulation pipeline; 120-first level first inflow pipeline; 130-first level first outflow pipeline; 140-second circulation pipeline; 150-first level second inflow pipeline; 160-first level second outflow pipeline; 170-second level first inflow pipeline; 180-second level second inflow pipeline; 190-second level first outflow pipeline; 190a-second level second outflow pipeline; 111-first liquid inlet; 112-first confluence outlet; 141-second liquid inlet; 142-second confluence outlet; 101-first sub-circulation pipeline;

[0063] 200-liquid inlet pipeline; 210-first liquid inlet pipeline; 220-second liquid inlet pipeline;

[0064] 300-liquid outlet pipeline; 310-first liquid outlet pipeline; 320-second liquid outlet pipeline;

[0065] 400-first shunt node; 410-first level first sub-shunt node;

[0066] 500-second shunt node; 510-first-level second sub-shunt node;

[0067] 600-connecting pipeline;

[0068] 700-first confluence node; 710-first level first sub-confluence node;

[0069] 800-second confluence node; 810-first-level second sub-confluence node;

[0070] 900-edge pipeline; 910-edge inflow pipeline; 920-edge outflow pipeline; 930-spoiler structure; 911-first edge inflow pipeline; 912-second edge inflow pipeline; 921-first edge outflow pipeline; 922-second edge outflow pipeline; 931-confluence section; 932-diversion section; 901-bend and circuitous section;

[0071] 10-battery cell group;

[0072] 20-cold plate; 21-stagnation cooling zone; 22-cold plate body; 23-joint; 22a-substrate; 22b-flow channel plate; 23a-liquid inlet; 23b-liquid outlet; 22c-sub-region; 22d-first partition; 22e-second partition; 22f-module partition; 22c1-first sub-region; 22c2-second sub-region; 22c3-third sub-region; 22c4-fourth sub-region; 22c5-fifth sub-region; 22c6-sixth sub-region; 22c7-seventh sub-region; 22c8-eighth sub-region. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0074] The embodiment of the present application provides a battery pack and an electric device including the battery pack, the electric device includes an electric device, and the battery pack can provide electric energy to the electric device. In the embodiment of the present application, the electric device can be a vehicle, and based on the design of the battery pack in the embodiment of the present application, the vehicle has stronger power performance and power stability. The vehicle can be a new energy vehicle (New Energy Vehicle), such as a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle; referred to as: PEV / BEV), a range extended electric vehicle (Range Extended Electric Vehicle; referred to as: REEV), a hybrid electric vehicle (Hybrid Electric Vehicle; referred to as: HEV), a fuel cell electric vehicle), and the vehicle can also be any vehicle with a battery.

[0075] The battery pack is usually equipped with a cell group, a connector, a battery management system (BMS), a battery thermal management device, necessary structural support bodies and structural protection bodies, etc. Among them, the battery management system is to monitor various performance indicators such as current and voltage during the operation of the battery pack, so that the battery pack works within a safe range. The battery thermal management device serves as a heat dissipation device for the cell group. Its function is to dissipate the heat of the cell group in a timely manner. The cell group can be connected to the battery thermal management device. In addition, the battery pack is generally installed on the lower shell of the battery pack, and then the battery pack is installed on the vehicle through the lower shell. In some cases, in order to control the weight of the battery pack and the lower shell and not affect the structural strength of the lower shell, and to improve the power performance of the vehicle, the lower shell can be made of carbon fiber, glass fiber, or a combination of carbon fiber and glass fiber.

[0076] With the increasing demand for vehicle power performance and endurance, battery packs need to have high capacity and high charging rate, which makes the battery packs very easy to heat up when in use. The battery thermal management device can cool the battery cell group in the battery pack through the flow of liquid. The basic principle is to form heat exchange with the battery cell group through the change of the state of the liquid. For example, when the liquid passes through the battery cell group, the heat of the battery cell group can be transferred to the liquid and part of the liquid can be changed from liquid to gas, thereby achieving the purpose of absorbing heat, thereby cooling the battery cell group.

[0077] To ensure the safety, life and performance stability of the battery pack, the operating temperature of the battery pack should not be too high. The cold plate is an important component of the above-mentioned battery thermal management device. The cold plate can be installed on one side of the battery cell group. There are multiple pipelines distributed in the cold plate. The battery cell group can be cooled by the flow of liquid in the pipelines.

[0078] At present, a uniform design concept is usually adopted in cold plates. For example, two parallel liquid inlet pipelines are symmetrically arranged in the middle position of the cold plate. The liquid inlet pipeline divides the cold plate into two and forms two partitions located on both sides of the liquid inlet pipeline. The partitions can correspond to the battery cell groups. For each partition, a liquid inlet branch can be arranged on the liquid inlet pipeline. Each liquid inlet branch can decompose each partition into multiple sub-areas. The number of sub-areas can be determined according to the number of battery cell groups. For example, when there are four battery cell groups, two partitions can be arranged, and each partition can include two sub-areas. The liquid inlet branch in each sub-area can usually be arranged in a parallel manner at both ends. For example, the liquid inlet branch in the sub-area is decomposed into two primary liquid inlet branches again. The liquid flows into the sub-area from the two primary liquid inlet branches respectively. A confluence node can be arranged at the tail of the sub-area to converge the liquid in the two primary liquid inlet branches. After the multiple sub-areas converge, they flow to the liquid outlet pipeline.

[0079] In the structural form of the above-mentioned cold plate, the two liquid inlet pipelines are usually arranged in a symmetrical structure, and the number and arrangement of the liquid inlet branches and the first-level liquid inlet branches in each partition are consistent, but the joint of the cold plate is usually set away from the liquid inlet pipeline and close to a certain partition. This results in different refrigerant flow rates in different areas of the cold plate and uneven liquid flow distribution after the liquid flows into the cold plate from the joint. There are differences in the heat dissipation effects of various areas on the cold plate, which can easily cause local overheating of the battery pack, making it difficult to achieve uniform heat dissipation of the battery pack, affecting the temperature uniformity of the battery pack, and thus affecting the overall performance of the battery pack.

[0080] Based on the above status quo and problems, an embodiment of the present application provides a cold plate, which rearranges each pipeline according to the location of the joint, thereby achieving the purpose of uniform flow of liquid to each liquid inlet pipeline.

[0081] To achieve the above-mentioned purpose, the basic concept adopted by the embodiment of the present application is to reasonably configure the levels of the pipelines in each sub-area so that each sub-area has a different amount of liquid diversion to change the flow resistance in each sub-area, so that the flow resistance faced by the liquid flowing to each sub-area is basically consistent, thereby making the liquid flow rate flowing to each sub-area consistent.

[0082] The cold plate in the embodiment of the present application has a more reasonable layout of the pipelines. The cold plate can achieve the purpose of evenly distributing the liquid flow. The heat dissipation effect of each sub-area on the cold plate is basically the same, which can avoid local overheating of the battery pack, achieve uniform heat dissipation of the battery pack, improve the temperature uniformity of the battery pack, and thus improve the overall performance of the battery pack.

[0083] In the embodiments of the present application, it should be noted that the pipelines in the cold plate are a general term for various pipeline structures. It can be recognized in the following embodiments that the pipelines mainly include liquid inlet pipelines, liquid outlet pipelines, and regional pipelines arranged in each sub-area, and the above-mentioned liquid diversion situation is mainly designed for regional pipelines.

[0084] Figure 1 Schematic diagram of the structure of a battery pack provided according to an embodiment of the present application is shown. In the embodiment of the present application, please refer to Figure 1 The battery pack includes a battery cell group 10 and a cold plate 20 , and the cold plate 20 can be arranged on one side of the battery cell group 10 .

[0085] The cold plate 20 can be disposed below the battery cell group 10 , or can cover the top of the battery cell group 10 , or can be disposed on the left or right side of the battery cell group 10 . The cold plate 20 can uniformly dissipate heat from the battery cell group 10 , improve the temperature uniformity of the battery cell group 10 , and thus improve the overall performance of the battery cell group 10 .

[0086] It should be noted that “above”, “below”, “left side” and “right side” are descriptions based on the orientation of the battery cell group 10 in use and are examples, and do not mean that the cold plate 20 and the battery cell group 10 are arranged as above in any case.

[0087] The battery cell group 10 may include a plurality of battery cell units, and the plurality of battery cell units may be arranged in a first direction. For example, the battery cell unit may be a square structure having a large plane, and the plurality of square structures may be arranged in the first direction in a manner that the large planes are in contact. In addition, the battery cell unit may also be a cylindrical structure having a side surface, and the plurality of battery cell units may be arranged along the diameter direction of the bottom surface of the cylindrical structure.

[0088] exist Figure 1 In the example shown, the cold plate 20 is disposed above the battery cell group 10 , and the battery cell units in the battery cell group 10 are arranged along the Y direction, where the Y direction is the first direction mentioned above.

[0089] In some embodiments, the battery pack may include a plurality of battery cell groups 10 , the plurality of battery cell groups 10 are arranged at intervals, and the cold plate 20 may dissipate heat for the plurality of battery cell groups 10 .

[0090] exist Figure 1 In the example shown, the battery pack is provided with eight battery cell groups 10, which are divided into two rows, each row includes four battery cell groups 10, the two rows of battery cell groups 10 are arranged at intervals along the Y direction, and the battery cell groups 10 in each row are arranged at intervals along the X direction.

[0091] Correspondingly, in order to achieve uniform heat dissipation for the eight battery cell groups 10 , the cold plate 20 is designed to include eight sub-regions 22 c that can correspond to the eight battery cell groups 10 , and each sub-region 22 c can dissipate heat for one battery cell group 10 .

[0092] In the above embodiment, the spacing distance between the battery cell groups 10 can be set according to actual conditions, and the position between the sub-regions 22c and the sub-regions 22c can form a stagnation cooling zone 21 corresponding to the spacing between the battery cell groups 10. The pipelines in the cold plate 20, such as the liquid inlet pipeline 200 and the liquid outlet pipeline 300 in the following embodiments, can be more arranged in the stagnation cooling zone 21.

[0093] Since the stagnation zone 21 corresponds to the interval between the battery cell groups 10, the liquid inlet pipeline 200 and the liquid outlet pipeline 300 located in the stagnation zone 21 can retain more of the original form of the liquid, and can avoid excessive gas phase in the liquid. The liquid inlet pipeline 200 is then diverted to each sub-area 22c to improve the heat dissipation effect of the battery cell group 10. In the following embodiments, it can be recognized that the liquid inlet pipeline 200 and the liquid outlet pipeline 300 can be arranged in the stagnation zone 21, which is the module separation zone 22f described below.

[0094] In other embodiments, the battery pack may also include a battery cell group 10 , and the cold plate 20 is designed to be adaptable to the structure of a battery cell group 10 .

[0095] Correspondingly, the cold plate 20 may be designed to include one sub-region 22 c or may be designed to include a plurality of sub-regions 22 c.

[0096] The above embodiments describe how the battery cell group 10 and the cold plate 20 form a battery pack. In other embodiments, the battery pack may also include a battery cell unit in a module-free form, that is, a cold plate 20 may be provided for a single or multiple battery cell units, and the cold plate 20 may also dissipate heat for the battery cell units.

[0097] To achieve installation of the battery pack, for example, to achieve installation of the battery pack on a vehicle, a plurality of mounting holes and mounting columns and other structures may be provided on the cold plate 20 , and these structures may be provided in areas of the cold plate 20 where no pipelines are provided.

[0098] It should be noted that the liquid flowing in the cold plate 20 is usually a refrigerant, and the flow of the refrigerant can achieve heat dissipation of the battery cell group 10. It is understandable that, while keeping the structure of the cold plate 20 unchanged, a heat medium can also be introduced into the cold plate 20, and the flow of the heat medium in the cold plate 20 can heat the battery cell group 10. For ease of understanding and description, this application mainly uses the method of heat dissipation of the battery cell group 10 by the refrigerant as an example to illustrate.

[0099] Figure 2 FIG. 2 is an exploded schematic diagram of a cold plate provided according to an embodiment of the present application. In the embodiment of the present application, the cold plate 20 includes a cold plate body 22 and a joint 23 , and the joint 23 is arranged on one side of the cold plate body 22 .

[0100] The cold plate body 22 is the main structure of the cold plate 20 , and pipelines of the cold plate 20 may be formed in the cold plate body 22 .

[0101] The cold plate body 22 may include a base plate 22a and a flow channel plate 22b. The flow channel plate 22b is provided with pipelines. The base plate 22a may be covered on the flow channel plate 22b.

[0102] The base plate 22a and the flow channel plate 22b can be made of metal materials with high corrosion resistance and strength, such as stainless steel, etc., and further, these metal materials can be coated on the surface. Of course, in order to control the cost, the flow channel plate 22b with pipelines can be made of metal materials with surface coating, and the base plate 22a can be made of ordinary metal materials, thereby achieving the purpose of reducing the manufacturing cost of the cold plate 20 without affecting the function of the cold plate 20.

[0103] The cold plate body 22 includes a plurality of sub-areas 22c, and a regional pipeline 100 is disposed in each sub-area 22c. It is understood that the number of sub-areas 22c is not limited. Figure 1 In the example shown, the number of the sub-regions 22 c is eight. In other embodiments, the number of the sub-regions 22 c may also be four, six, or other numbers.

[0104] The regional pipeline 100 here is a pipeline formed in the sub-region 22c. The regional pipeline 100 can be set corresponding to the structure and size of the battery cell group 10. For example, when the battery cell group 10 is a square structure, the sub-region 22c is also a square structure, and the regional pipeline 100 in the sub-region 22c can be arranged in the sub-region 22c in a prescribed manner.

[0105] It should be noted that, as an example, the regional pipeline 100 in the sub-region 22c can be arranged according to the arrangement of the battery cell units in the battery cell group 10. Figure 1 Taking the example shown as an example, the battery cell units of the battery cell group 10 are arranged along the Y direction. In order to facilitate the heat dissipation of each battery cell unit in the battery cell group 10, the regional pipeline 100 can be arranged in a curved and circuitous manner as a whole. The regional pipeline 100 can extend along the Y direction so that it spans across each battery cell unit. The regional pipeline 100 can also be bent and circuitous so that it is arranged at intervals along the X direction. For a detailed description of the bending and circuitousness, please refer to the description of the regional pipeline 100 in the first sub-region 22c1 in the following embodiment.

[0106] The joint 23 includes a liquid inlet 23a and a liquid outlet 23b, and the liquid inlet 23a and the liquid outlet 23b are connected to the regional pipeline 100 in the sub-region 22c. In the embodiment of the present application, the number of the liquid inlet 23a and the liquid outlet 23b is not particularly limited. For example, in the following embodiments, two liquid inlets 23a can be provided to form the first liquid inlet pipeline 210 and the second liquid inlet pipeline 220 respectively, or one liquid inlet 23a can be shared to form the first liquid inlet pipeline 210 and the second liquid inlet pipeline 220 respectively. For another example, in the following embodiments in which a first liquid outlet pipeline 310 and a second liquid outlet pipeline 320 are provided, two liquid outlets 23b can be provided to correspond to the first liquid outlet pipeline 310 and the second liquid outlet pipeline 320 respectively, or one liquid outlet 23b can be designed for the first liquid outlet pipeline 310 and the second liquid outlet pipeline 320.

[0107] It can be understood that the liquid enters the cold plate body 22 from the liquid inlet 23a, and the liquid can flow in the cold plate body 22 and reach the regional pipeline 100, and then the liquid flows from the regional pipeline 100 to the liquid outlet 23b. The flow path of the liquid between the liquid inlet 23a and the liquid outlet 23b can form a liquid flow channel, and the multiple sub-areas 22c are arranged in a direction away from the joint 23.

[0108] The regional pipeline (100) in each sub-region (22c) is respectively connected to the liquid inlet (23a) and the liquid outlet (23b) to form a liquid flow channel. For each sub-region 22c, the flow direction of the liquid inside can be summarized as flowing in from the liquid inlet 23a and flowing out from the liquid outlet 23b, and the overall path of the liquid flowing in and out is the liquid flow channel. When there are multiple sub-regions 22c, since the joint 23 is arranged on one side of the cold plate body 22, it can be understood that the liquid flow channel of the sub-region 22c farther away from the joint 23 is designed to be longer.

[0109] It can be understood that, in the direction away from the joint 23, the easier it is for the liquid to flow into the sub-region 22c close to the liquid inlet 23a, the harder it is for the liquid to flow into the sub-region 22c far from the liquid inlet 23a. The reason is that the liquid flows in different distances and is accompanied by differences in flow resistance. The closer the sub-region 22c is to the liquid inlet 23a, the shorter the distance and the smaller the flow resistance, so it is easier for the liquid to flow into the sub-region 22c. The farther the sub-region 22c is from the liquid inlet 23a, the longer the distance and the greater the flow resistance, so it is difficult for the liquid to flow into the sub-region 22c, resulting in uneven flow rates into each sub-region 22c.

[0110] In the cold plate 20 in the embodiment of the present application, in the direction away from the joint 23, the number of shunt lines of the regional pipeline 100 arranged in each sub-region 22c shows a first increasing trend, thereby balancing the problem of uneven shunt caused by different distances and flow resistances.

[0111] Specifically, "diversion line" refers to the number of first sub-circulation pipelines 101 separated from one pipeline. In combination with the following embodiments, it can be seen that the first sub-circulation pipeline 101 can be a basic component unit of the first circulation pipeline 110 or the second circulation pipeline 140. When a liquid flow flows into a sub-area 22c, the liquid flow can be diverted into a corresponding number of sub-liquid flows depending on the number of first sub-circulation pipelines 101. The more sub-liquid flows there are, the more they can flow in the sub-area 22c and form more liquid flow, thereby avoiding the interference of distance and flow resistance, thereby achieving the purpose of uniform distribution of liquid flow.

[0112] Assuming that four sub-areas 22c are provided along the extension direction of the liquid flow channel, it may be useful to refer to Figure 1 , respectively, are the first sub-region 22c1, the second sub-region 22c2, the third sub-region 22c3 and the fourth sub-region 22c4. The regional pipeline 100 in the above-mentioned sub-regions 22c can be arranged as follows: the liquid flow flowing into the first sub-region 22c1 is divided into two streams and flows in from two liquid flow inlets of the regional pipeline 100 (the liquid flow inlet will be described in the following embodiments, such as the first liquid flow inlet 111 hereinafter), the liquid flow flowing into the second sub-region 22c2 is divided into two streams and flows in from two liquid flow inlets of the regional pipeline 100, the liquid flow flowing into the third sub-region 22c3 can be divided into four streams and flows in from four liquid flow inlets of the regional pipeline 100, and the liquid flow flowing into the fourth sub-region 22c4 can be divided into eight streams and flows in from eight liquid flow inlets of the regional pipeline 100. As for the first sub-region 22c1 and the second sub-region 22c2, both are closer to the liquid inlet 23a, and the distance and flow resistance have little effect. Both are arranged in two streams, and the two streams can fill the entire regional pipeline 100 at a first speed. As for the third sub-region 22c3, the distance and flow resistance have a greater impact. The third sub-region 22c3 adopts a four-stream arrangement, and the four streams can fill the entire regional pipeline 100 at a second speed. The second speed is lower than the first speed, but the total amount of liquid flowing into the regional pipeline 100 can be kept consistent, thereby achieving the same effect as the first sub-region 22c1. As for the fourth sub-region 22c4, the distance and flow resistance have a greater impact. The fourth sub-region 22c4 adopts an eight-stream arrangement, and the eight streams can fill the entire regional pipeline 100 at a third speed. The third speed is lower than the first speed, but the total amount of liquid flowing into the regional pipeline 100 can be kept consistent, thereby achieving the same effect as the first sub-region 22c1.

[0113] As can be seen from the above description, the first increasing trend can be characterized by the number of liquid flow inlets. As mentioned above, the first sub-area 22c1 and the second sub-area 22c2 are respectively configured with two liquid flow inlets, the third sub-area 22c3 is configured with four liquid flow inlets, and the fourth sub-area 22c4 is configured with eight liquid flow inlets. This change from two to four and then to eight belongs to the category of the first increasing trend. It should be understood that the first increasing trend in the embodiment of the present application only indicates that there is an increasing relationship in the number of diversion lines, and this increase can be a linear increase or a nonlinear increase.

[0114] It can be understood that by rationally configuring the flow diversion lines of the regional pipelines 100 in different sub-regions 22c, the effects caused by the distance and flow resistance can be balanced, so that the liquid flow into each sub-region 22c can be kept consistent.

[0115] In the embodiment of the present application, by reasonably configuring the number of shunt lines of the regional pipeline 100 in each sub-region 22c, the cold plate 20 can achieve the purpose of evenly distributing the liquid flow. The heat dissipation effect of each sub-region 22c on the cold plate 20 is basically the same, which can avoid local overheating of the battery pack, achieve uniform heat dissipation of the battery pack, improve the temperature uniformity of the battery pack, and thus improve the overall performance of the battery pack.

[0116] In the embodiment of the present application, the specific structure of the cold plate 20 and the arrangement of each sub-region 22c are not particularly limited, and the specific structure of the cold plate 20 and the arrangement of each sub-region 22c can be adaptively designed according to the specific type of the battery pack. Figure 1 In the example shown, the cold plate 20 may be designed as a rectangular structure, and the sub-regions 22c are evenly spaced along the X direction and the Y direction on the cold plate 20. In other embodiments, the cold plate 20 may be designed into other various structures, such as a circle, an ellipse, and the like.

[0117] In addition, the joint 23 in the cold plate 20 can adopt various structural forms, which can be designed to be detachable from the cold plate body 22, or can be integrated on the cold plate body 22. The structure can be a straight pipe or a curved pipe, and the joint 23 can be manufactured by mechanical processing or by integral injection molding.

[0118] The various components of the cold plate 20 can be connected by brazing or laser welding. For example, the joint 23 can be connected to the flow channel plate 22b by brazing or laser welding. For another example, the flow channel plate 22b can be connected to the base plate 22a by brazing or laser welding.

[0119] In addition, in the embodiment of the present application, the number of regional pipelines 100 in each sub-region 22 c can be set according to the structure and size of each battery cell group 10. As a principle, the regional pipeline 100 can cover each battery cell group 10 as much as possible.

[0120] In the embodiment of the present application, the specific structure of the cold plate 20 is mainly described in a manner that the sub-regions 22c are connected in parallel. Of course, in other embodiments, the sub-regions 22c can also be arranged in series.

[0121] Figure 3 A schematic diagram of the pipeline arrangement of a cold plate provided according to an embodiment of the present application is shown.

[0122] In the embodiment of the present application, the cold plate body 22 is formed with a liquid inlet pipeline 200 and a liquid outlet pipeline 300, the liquid inlet 23a is located at one end of the liquid inlet pipeline 200, the liquid outlet 23b is located at one end of the liquid outlet pipeline 300, and multiple sub-areas 22c are connected in parallel between the liquid inlet pipeline 200 and the liquid outlet pipeline 300.

[0123] In this embodiment, the liquid inlet pipeline 200 and the liquid outlet pipeline 300 are the main parts in the liquid flow channel. The liquid can enter the liquid inlet pipeline 200 from the liquid inlet port 23a, and then flow from the liquid inlet pipeline 200 to the regional pipeline 100 in each sub-region 22c, and then flow from the regional pipeline 100 into the liquid outlet pipeline 300, and finally flow out from the liquid outlet port 23b, thereby realizing the flow of liquid in the entire liquid flow channel.

[0124] In this embodiment, the liquid inlet pipeline 200 and the liquid outlet pipeline 300 can be set at the edge of the liquid cooling plate, or through reasonable planning, the liquid inlet pipeline 200 and the liquid outlet pipeline 300 can be located in the middle of the liquid cooling plate, for example, in the stagnation cooling zone 21 of the liquid cooling plate.

[0125] In some embodiments, at least one partition is formed on the cold plate body 22, and a plurality of sub-areas 22c are connected in parallel within the partition. Figure 3 In the example shown, two partitions are formed on the cold plate body 22, and the pipelines in the two partitions are arranged in substantially the same manner. It is understood that in other embodiments, only one partition may be provided on the cold plate body 22. For ease of understanding, the following embodiment is mainly described in detail with respect to the case of providing two partitions, and it is recognized that each partition may be provided separately.

[0126] In some embodiments, please refer to Figure 3The cold plate body 22 is provided with a first partition 22d and a second partition 22e along a first direction, and the first direction is perpendicular to the arrangement direction of the plurality of sub-regions 22c. The first partition 22d and the second partition 22e are provided with a plurality of sub-regions 22c. The liquid inlet pipeline 200 includes a first liquid inlet pipeline 210 and a second liquid inlet pipeline 220. The liquid outlet pipeline 300 includes a first liquid outlet pipeline 310 and a second liquid outlet pipeline 320. The plurality of sub-regions 22c in the first partition 22d are connected in parallel between the first liquid inlet pipeline 210 and the first liquid outlet pipeline 310. The plurality of sub-regions 22c in the second partition 22e are connected in parallel between the second liquid inlet pipeline 220 and the second liquid outlet pipeline 320.

[0127] The first direction is the same as defined above, and can be referred to Figure 3 In this embodiment, the cold plate body 22 is divided into a first partition 22d and a second partition 22e, so that more sub-regions 22c can be formed on the cold plate body 22, and the multiple sub-regions 22c can be reasonably arranged on the cold plate body 22. The multiple sub-areas 22c in the first partition 22d are connected in parallel to the first liquid inlet pipeline 210 and the first liquid outlet pipeline 310, and the multiple sub-areas 22c in the second partition 22e are connected in parallel to the second liquid inlet pipeline 220 and the second liquid outlet pipeline 320, thereby improving the even distribution effect of the liquid on the cold plate body 22, and the overall liquid flow can be divided into two streams, and the two liquid flows flow into the first partition 22d and the second partition 22e respectively, and the liquid flows flowing into each sub-area 22c in the first partition 22d and the second partition 22e are further diverted, so that the liquid flow rate flowing into the first partition 22d and the second partition 22e can be kept consistent, thereby making the liquid flow rate flowing into each sub-area 22c in the first partition 22d and each sub-area 22c in the second partition 22e consistent.

[0128] It is understandable that, in other embodiments, the cold plate body 22 may further be provided with a third partition, a fourth partition, etc., so as to further improve the uniform distribution effect of the liquid flow rate.

[0129] by Figure 3 Taking the example shown as an example, the first sub-region 22c1, the second sub-region 22c2, the third sub-region 22c3 and the fourth sub-region 22c4 can be set in the first partition 22d, and the fifth sub-region 22c5, the sixth sub-region 22c6, the seventh sub-region 22c7 and the eighth sub-region 22c8 can be set in the second partition 22e.

[0130] In the embodiment of the present application, in order to realize the flow diversion of the liquid, a diversion node may be set at an appropriate position, and the diversion node includes at least three ports, so as to at least divide the liquid into two streams, where the diversion node means that one liquid stream is divided into two streams, and the diversion node may be set on the liquid inlet pipeline 200, for example, the diversion node may be set on the first liquid inlet pipeline 210 and the second liquid inlet pipeline 220. Similarly, after the liquid stream is diverted, it needs to be aggregated and flow out from the liquid outlet pipeline 300, so a confluence node may be set on the first liquid outlet pipeline 310 and the second liquid outlet pipeline 320, and the confluence node may include two ports, or three ports, etc.

[0131] In the embodiment of the present application, a diversion node can be set for each sub-area 22c, or a diversion node can be set for two sub-areas 22c or more sub-areas 22c. The liquid flow is divided from the diversion node into a corresponding number of liquid flows and flows to each sub-area 22c.

[0132] For example, in some embodiments, reference may be made to Figure 3 A plurality of first flow diversion nodes 400 are arranged on the first liquid inlet pipeline 210, and the number of the first flow diversion nodes 400 is consistent with the number of sub-regions 22c in the first partition 22d; a plurality of second flow diversion nodes 500 are arranged on the second liquid inlet pipeline 220, and the number of the second flow diversion nodes 500 is consistent with the number of sub-regions 22c in the second partition 22e.

[0133] It is understandable that for the first liquid inlet pipeline 210, keeping the number of first flow splitting nodes 400 consistent with the number of sub-areas 22c in the first partition 22d can simplify the structural layout of the pipeline in the first partition 22d. The second liquid inlet pipeline 220 also has the same effect, which will not be described in detail.

[0134] It should be noted that, in order to facilitate the control of the flow rate to each sub-area 22c, the position of the first flow dividing node 400 corresponding to different sub-areas 22c can be set, so as to reduce the influence of the distance and flow resistance on the liquid flow rate. Taking the first sub-area 22c1, the second sub-area 22c2, the third sub-area 22c3 and the fourth sub-area 22c4 as an example, the first flow dividing node 400 corresponding to the first sub-area 22c1 can be set at a position far away from the joint 23, for example, the first flow dividing node 400 is set at the right area of ​​the first sub-area 22c1 along the X direction, and the first flow dividing node 400 corresponding to the second sub-area 22c2 can be set at a position close to the joint 23, for example, the first flow dividing node 400 is set at the left side of the second sub-area 22c2 along the X direction, etc. The third sub-area 22c3 and the fourth sub-area 22c4 can be set with reference to the second sub-area 22c2.

[0135] Each second shunt node 500 in the second partition 22e can be configured with reference to the above-mentioned first shunt node 400, and will not be described in detail.

[0136] In some embodiments, reference may be made to Figure 3 The regional pipeline 100 in each sub-area 22c in the first partition 22d includes a first circulation pipeline 110, at least X first-level first inflow pipelines 120 branched from the first diversion node 400, and at least one first-level first outflow pipeline 130 connected to the first liquid outlet pipeline 310; the regional pipeline 100 in each sub-area 22c in the second partition 22e includes a second circulation pipeline 140, at least X second-level second inflow pipelines 180 branched from the second diversion node 500, and at least one first-level second outflow pipeline 160 connected to the second liquid outlet pipeline 320.

[0137] Wherein, X is a positive integer greater than or equal to 2, and the value of X increases in the direction away from the joint 23.

[0138] In the above embodiment, in order to simplify the description, the relevant settings in the first partition 22d are taken as an example for explanation, and the second partition 22e can be set with reference to the first partition 22d.

[0139] In the above embodiment, the first circulation pipeline 110 is a pipeline corresponding to the battery cell group 10 or the battery cell unit. The first circulation pipeline 110 is closest to the battery cell group 10 or the battery cell unit, and can quickly dissipate the heat of the battery cell group 10. The bending and circuitous arrangement mentioned above can be applied to the first circulation pipeline 110. The main function of the first-level first inflow pipeline 120 is to receive the liquid flow diverted from the first diversion node 400, and at the same time direct the liquid flow to the first circulation pipeline 110. Of course, the first inflow pipeline can also play a role in heat dissipation for the battery cell group 10. The main function of the first-level first outflow pipeline 130 is to receive the liquid after heat exchange with the battery cell group 10 and make it flow to the first liquid outlet pipeline 310.

[0140] In the above embodiment, X is greater than or equal to 2, which means that the number of the first-level first inflow pipelines 120 is at least 2, and at least two first-level first inflow pipelines 120 can be respectively connected to the two ends of the first circulation pipeline 110, and the two ends can be arranged on both sides of the sub-area 22c along the X direction, so that the liquid flow can flow into the first circulation pipeline 110 from the opposite sides of the sub-area 22c, thereby improving the heat dissipation effect of the battery cell group 10.

[0141] For ease of understanding and explanation, Figure 3 The illustrated example describes the zone piping 100 of the first sub-zone 22 d in detail.

[0142] You can refer to Figure 3 The first partition 22d is provided with a first sub-region 22c1, a second sub-region 22c2, a third sub-region 22c3 and a fourth sub-region 22c4. With respect to the first sub-region 22c1 and the second sub-region 22c2, taking the first sub-region 22c1 as an example, two liquid flows are branched from the first branching node 400 corresponding to the first sub-region 22c1, and the two liquid flows flow into the first circulation pipeline 110 from both ends of the first sub-region 22c1 along the X direction, respectively. The number of the first-level first inflow pipelines 120 in the first sub-region 22c1 is 2, and the liquid flow can flow in the first circulation pipeline 110 at a first speed. With respect to the third sub-region 22c3, four liquid flows are branched from the first branching node 400 corresponding to the third sub-region 22c3, and the four liquid flows flow into the first circulation pipeline 110 in a half-by-half manner from both ends of the third sub-region 22c3 along the X direction, respectively. The number of the first-level first inflow pipelines 120 in the third sub-region 22c3 is 4, and the liquid flow can flow in the first circulation pipeline 110 at a second speed. 110, the second speed is less than the first speed, but since there are more first-level first inflow pipelines 120, the balance of liquid flow can be achieved, and the consistency of liquid flow in the first sub-region 22c1 and the third sub-region 22c3 is maintained; for the fourth sub-region 22c4, eight liquid flows are branched from the first branch node 400 corresponding to the fourth sub-region 22c4, and the eight liquid flows flow into the first circulation pipeline 110 from both ends of the fourth sub-region 22c4 along the X direction in half, and the number of first-level first inflow pipelines 120 in the fourth sub-region 22c4 is 8, and the liquid flow can flow in the first circulation pipeline 110 at a third speed, which is less than the first speed, but since there are more first-level first inflow pipelines 120, the balance of liquid flow can be achieved, and the consistency of liquid flow in the first sub-region 22c1 and the fourth sub-region 22c4 is maintained.

[0143] In the above description, it can be understood that a liquid flow corresponds to a first sub-circulation pipeline 101 in the first circulation pipeline 110. It can be understood that there are two first sub-circulation pipelines 101 arranged in a curved and circuitous manner and in parallel in the first circulation pipeline 110 in the first sub-region 22c1, there are four first sub-circulation pipelines 101 arranged in a curved and circuitous manner and in parallel in the first circulation pipeline 110 in the third sub-region 22c3, and there are eight first sub-circulation pipelines 101 arranged in a curved and circuitous manner and in parallel in the first circulation pipeline 110 in the fourth sub-region 22c4.

[0144] For the second partition 22e, please refer to Figure 3The second partition 22e is provided with a fifth sub-area 22c5, a sixth sub-area 22c6, a seventh sub-area 22c7 and an eighth sub-area 22c8, and the regional pipelines 100 in the fifth sub-area 22c5, the sixth sub-area 22c6, the seventh sub-area 22c7 and the eighth sub-area 22c8 can be respectively provided corresponding to the above-mentioned first sub-area 22c1, the second sub-area 22c2, the third sub-area 22c3 and the fourth sub-area 22c4.

[0145] To achieve the connection between the first inflow pipeline 120 and the first circulation pipeline 110, and the connection between the second inflow pipeline 150 and the second circulation pipeline 140, in some embodiments, please refer to Figure 3 The first circulation pipeline 110 includes X first liquid flow inlets 111 and at least one first confluence outlet 112, the first-level first inflow pipeline 120 is connected to the first liquid flow inlet 111, and the first-level first outflow pipeline 130 is connected to the first confluence outlet 112. The second circulation pipeline 140 includes X second liquid flow inlets 141 and at least one second confluence outlet 142, the first-level second inflow pipeline 150 is connected to the second liquid flow inlet 141, and the first-level second outflow pipeline 160 is connected to the second confluence outlet 142, which are arranged in a direction away from the joint 23, and X in the sub-area 22c presents a first increasing trend.

[0146] In the above embodiment, the last section of the first flow pipeline 110 can be taken and set as the first-level first outflow pipeline 130. The first-level first outflow pipeline 130 can be set at the center of the first flow pipeline 110. The liquid flows flowing into the first flow pipeline 110 from both sides of the first flow pipeline 110 along the X direction can converge into the first-level first outflow pipeline 130 and flow out from the first confluence outlet 112. This method of forming the first-level first outflow pipeline 130 can refer to Figure 3 The first sub-region 22c1 in the.

[0147] In order to form the above-mentioned first liquid flow inlets 111 with the same number as the first-level first inflow pipeline 120 and to form the above-mentioned first-level first outflow pipeline 130, the first circulation pipeline 110 of each sub-area includes two first sub-circulation pipelines 101, each first sub-circulation pipeline 101 has a first liquid flow inlet 111, and the first confluence outlet 112 is located between the first liquid flow inlets 111 of the two first sub-circulation pipelines 101.

[0148] In other embodiments, the liquid flow can also be converged by setting a connecting pipe 600, which can be referred to Figure 3In the third sub-region 22c3 and the fourth sub-region 22c4, a connecting pipeline 600 that can be connected to multiple pipelines at the same time can be set at the tail end of the first circulation pipeline 110. Taking the third sub-region 22c3 as an example, the connecting pipeline 600 can at least connect two parallel first sub-circulation pipelines 101 at the same time.

[0149] For the head of the first circulation pipeline 110, in addition to the aforementioned parallel pipeline method, a connecting pipeline 600 can also be provided to realize the flow of liquid in multiple pipelines. Taking the third sub-area 22c3 as an example, a connecting pipeline 600 can be provided between the two first sub-circulation pipelines 101 located on the left side in the X direction to connect the two pipelines, so that the liquid flow branched from the first branching node 400 can flow to the connecting pipeline 600 and then be divided into two liquid flows that flow into the two first sub-circulation pipelines 101 respectively.

[0150] Specifically, the first circulation pipeline 110 includes X1 first liquid flow inlets 111 and at least one first confluence outlet 112, and the cold plate body 22 is further formed with a connecting pipeline 600 for connecting at least two first liquid flow inlets 111, the first-level first inflow pipeline 120 is connected to the first liquid flow inlet 111 through at least one connecting pipeline 600, and the first-level first outflow pipeline 130 is connected to the first confluence outlet 112, X1 is a positive integer greater than X, wherein, arranged in a direction away from the joint 23, X1 in the sub-area 22c presents a first increasing trend. Therefore, by setting the connecting pipeline 600, the number of the first liquid flow inlets 111 can be greater than the first-level first inflow pipeline 120, so that a greater number of diversion lines can be formed.

[0151] It should be noted that the above-mentioned "tail" and "head" are descriptions based on the extension direction of the liquid flow channel. The head can be understood as the end where the liquid in the first circulation pipeline 110 flows in, and the tail can be understood as the end where the liquid in the first circulation pipeline 110 flows out.

[0152] In some embodiments, a first-level first sub-dividing node may also be provided on the first-level first inflow pipeline 120, the first-level first sub-dividing node is connected to the first diverting node 400, and a second-level first inflow pipeline is provided between the first-level first sub-dividing node and the first liquid flow inlet 111; a first-level second sub-dividing node is also provided on the first-level second inflow pipeline 150, the first-level second sub-dividing node is connected to the second diverting node 500, and a second-level second inflow pipeline is provided between the first-level second sub-dividing node and the second liquid flow inlet 141.

[0153] In the above embodiment, a secondary first inflow pipeline can be formed by setting a primary first sub-diversion node so that the liquid flow in the primary first inflow pipeline 120 can be diverted again. The diverted liquid flow flows into the first circulation pipeline 110 through the secondary first inflow pipeline, which can improve the effect of uniform diversion.

[0154] The settings of the first-level second sub-dividing node and the second-level second inflow pipeline can refer to the settings on the first-level first inflow pipeline 120, and will not be repeated here.

[0155] In the above embodiment, it can be understood that in addition to adjusting the positions of the first shunt node 400 and the second shunt node 500 as described above, the position of the first-level first sub-shunt node can also be adjusted to achieve a uniform shunt effect.

[0156] In addition to the above, the purpose of improving the uniform current distribution effect can also be achieved by configuring the first bus node 700 and the second bus node 800 .

[0157] In some embodiments, please refer to Figure 3 A first confluence node 700 is arranged on the first liquid outlet pipeline 310, and the number of the first confluence nodes 700 is consistent with the number of sub-areas 22c in the first partition 22d; a plurality of second confluence nodes 800 are arranged on the second liquid outlet pipeline 320, and the number of the second confluence nodes 800 is consistent with the number of sub-areas 22c in the second partition 22e.

[0158] Here, by setting the number of the first confluence nodes 700 and the second confluence nodes 800 to be consistent with the number of the sub-areas 22c, the structure of the pipeline can be simplified, and at the same time, it can be adapted to the first diversion node 400 and the second diversion node 500 to improve the stability of the liquid flow.

[0159] In some embodiments, a first-level first sub-confluence node is provided on the first-level first outflow pipeline 130, the first-level first sub-confluence node is connected to the first confluence node 700, and a second-level first outflow pipeline is provided between the first-level first sub-confluence node and the first circulation pipeline 110; a first-level second sub-confluence node is provided on the first-level second outflow pipeline 160, the first-level second sub-confluence node 810 is connected to the first confluence node 700, and a second-level second outflow pipeline is provided between the first-level second sub-confluence node and the second circulation pipeline 140.

[0160] Here, by setting a first-level first sub-confluence node, a second-level first outflow pipeline, a first-level second sub-confluence node and a second-level second outflow pipeline, multiple confluences of the liquid flow can be achieved, thereby improving the effect of uniform flow distribution.

[0161] In the above embodiment, it can be understood that the positions of the first bus node 700 and the second bus node 800 can be adjusted to achieve the purpose of improving the uniform flow distribution effect. For example, the first sub-area 22c1, the second sub-area 22c2, the third sub-area 22c3 and the fourth sub-area 22c4 are respectively set in the first partition 22d. The first bus node 700 corresponding to the first sub-area 22c1 can be set at a position close to the joint 23, for example, the first bus node 700 is set at the left area of ​​the first sub-area 22c1 along the X direction, and the first bus node 700 corresponding to the second sub-area 22c2 can be set at a position away from the joint 23, for example, the first bus node 700 is set at the right side of the second sub-area 22c2 along the X direction. In addition, the position of the first sub-bus node 710 of the first level can also be adjusted to achieve the purpose of the uniform flow distribution effect.

[0162] In the above embodiments, various situations in which the number of the first flow diversion nodes 400 and the number of the sub-regions 22c are kept consistent are described. It can be seen from the above description that the purpose of uniform flow diversion can be achieved by reasonably configuring the number of liquid flows in each sub-region 22c, and by reasonably configuring the positions of the first flow diversion node 400, the second flow diversion node 500, the first confluence node 700, the second confluence node 800, and each sub-confluence node and sub-flow diversion node.

[0163] For example, in some other embodiments, please refer to Figure 3 A plurality of first flow diversion nodes 400 are arranged on the first liquid inlet pipeline 210, and the number of the first flow diversion nodes 400 is less than the number of the sub-regions 22c in the first partition 22d; a plurality of second flow diversion nodes 500 are arranged on the second liquid inlet pipeline 220, and the number of the second flow diversion nodes 500 is less than the number of the sub-regions 22c in the second partition 22e.

[0164] In the following description, in order to simplify the description, the first partition 22d is taken as an example for explanation, and the corresponding structure in the second partition 22e can be set with reference to the first partition 22d.

[0165] It is understandable that, for the first liquid inlet pipeline 210, setting the number of first flow diversion nodes 400 to be less than the number of sub-regions 22c can reduce the number of first flow diversion nodes 400 set on the first liquid inlet pipeline 210, thereby reducing the manufacturing difficulty and cost of the first liquid inlet pipeline 210.

[0166] In some other embodiments, the position of each first diversion node 400 can be set. The setting method can refer to the above text and will not be described in detail.

[0167] In some other embodiments, the first shunt nodes 400 may be in multiple relation with the sub-region 22 c , or may be less in number than the sub-region 22 c .

[0168] For example, in the first embodiment, please refer to Figure 3 , the number of sub-regions 22c in the first partition 22d is n times the number of first shunt nodes 400; the number of sub-regions 22c in the first partition 22d is n times the number of first shunt nodes 400,

[0169] Wherein, n is a positive integer greater than or equal to 2.

[0170] In the first embodiment, setting the number of sub-areas 22c to an integer multiple of the first flow splitting nodes 400 can effectively simplify the number of first flow splitting nodes 400, thereby controlling the manufacturing cost of the first liquid inlet pipeline 210. On the other hand, more flow splitting combinations can be formed through the above settings, thereby improving the effect of uniform liquid flow.

[0171] In some embodiments, please refer to Figure 3 The regional pipelines 100 in each sub-area 22c in the first partition 22d include a first circulation pipeline 110, a first-level first inflow pipeline 120 branched from the first diversion node 400, Y second-level first inflow pipelines 170 branched from each first-level first inflow pipeline 120, and at least one first-level first outflow pipeline 130 connected to the first liquid outlet pipeline 310; the regional pipelines 100 in each sub-area 22c in the second partition 22e include a second circulation pipeline 140, a second-level second inflow pipeline 180 branched from the second diversion node 500, Y second-level second inflow pipelines 180 branched from each first-level second inflow pipeline 150, and at least one first-level second outflow pipeline 160 connected to the second liquid outlet pipeline 320, wherein Y is a positive integer greater than or equal to 2.

[0172] Different from the embodiment described above in which the number of sub-areas 22c is the same as the number of first shunt nodes 400, the first-level first inflow pipeline 120 and the second-level first inflow pipeline 170 form a phenomenon of re-shunt, and the second-level first inflow pipeline 170 can be connected to the first circulation pipeline 110. The number of the second-level first inflow pipelines 170 is Y, and Y is greater than or equal to 2, which means that the number of the second-level first inflow pipelines 170 is at least 2. At least two second-level first inflow pipelines 170 can be respectively connected to the two ends of the first circulation pipeline 110, and the two ends can be arranged on both sides of the sub-area 22c along the X direction, so that the liquid flow can flow into the first circulation pipeline 110 from the opposite sides of the sub-area 22c, thereby improving the heat dissipation effect of the battery cell group 10.

[0173] Since the primary first inflow pipeline 120 is split again to form a secondary first inflow pipeline 170, the effect of uniform liquid flow can be further improved.

[0174] In some embodiments, similar to the above-described embodiment in which the number of sub-regions 22c is the same as the number of first shunt nodes 400, please refer to Figure 3 When the number of the secondary first inflow pipelines 170 is the same as the number of the first liquid flow inlets 111, the first circulation pipeline 110 includes Y first liquid flow inlets 111 and at least one first confluence outlet 112, the secondary first inflow pipeline 170 is correspondingly connected to the first liquid flow inlet 111, and the primary first outflow pipeline 130 is connected to the first confluence outlet 112; the second circulation pipeline 140 includes Y second liquid flow inlets 141 and at least one second confluence outlet 142, the secondary second inflow pipeline 180 is correspondingly connected to the second liquid flow inlet 141, and the primary second outflow pipeline 160 is connected to the second confluence outlet 142, and they are arranged in a direction away from the joint 23, and Y in the sub-area 22c presents a first increasing trend. When the number of secondary first inflow pipelines 170 is less than the number of first liquid flow inlets 111, the first circulation pipeline 110 includes Y1 first liquid flow inlets 111 and at least one first confluence outlet 112, and the cold plate body 22 is also formed with a connecting pipeline 600 for connecting at least two first liquid flow inlets 111. The secondary first inflow pipeline 170 is connected to the first liquid flow inlet 111 through at least one connecting pipeline 600, and the primary first outflow pipeline 130 is connected to the first confluence outlet 112. Y1 is a positive integer greater than Y, wherein, arranged in a direction away from the joint 23, Y1 in the sub-area 22c shows a first increasing trend.

[0175] In some embodiments, please refer to Figure 3 A first-level first sub-dividing node 410 is also provided on the first-level first inflow pipeline 120, and the second-level first inflow pipeline 170 is connected between the first-level first sub-dividing node 410 and the first circulation pipeline 110; a first-level second sub-dividing node 510 is also provided on the first-level second inflow pipeline 150, and the second-level second inflow pipeline 180 is connected between the first-level second sub-dividing node 510 and the second circulation pipeline 140.

[0176] Similar to the aforementioned embodiment in which the number of sub-regions 22c is the same as the number of first flow diversion nodes 400, the positions of the first flow diversion nodes 400 and the first-level first sub-flow diversion nodes 410 can be set to enhance the effect of uniformizing the liquid flow rate.

[0177] On this basis, in some embodiments, a secondary first sub-dividing node may be further provided on the secondary first inflow pipeline 170, the secondary first sub-dividing node is connected to the primary first sub-dividing node 410, and a tertiary first inflow pipeline is provided between the secondary first sub-dividing node and the first circulation pipeline 110; a secondary second sub-dividing node is also provided on the secondary second inflow pipeline 180, the secondary second sub-dividing node is connected to the primary second sub-dividing node 510, and a tertiary second inflow pipeline is provided between the secondary second sub-dividing node and the second circulation pipeline 140.

[0178] The position of the second-level first sub-flow node can also be set to enhance the effect of uniform liquid flow.

[0179] Similar to the above-mentioned embodiment in which the number of sub-regions 22c is the same as the number of first shunt nodes 400, in some embodiments, please refer to Figure 3 The first liquid outlet pipeline 310 is provided with a first confluence node 700, and the number of the first confluence nodes 700 is consistent with the number of the first diversion nodes 400; the second liquid outlet pipeline 320 is provided with a plurality of second confluence nodes 800, and the number of the second confluence nodes 800 is consistent with the number of the second diversion nodes 500.

[0180] In some embodiments, a first-level first sub-convergence node 710 is provided on the first-level first outflow pipeline 130, the first-level first sub-convergence node 710 is connected to the first confluence node 700, and a second-level first outflow pipeline 190 is provided between the first-level first sub-convergence node 710 and the regional pipeline 100; a first-level second sub-convergence node 810 is provided on the first-level second outflow pipeline 160, the first-level second sub-convergence node 810 is connected to the first confluence node 700, and a second-level second outflow pipeline 190a is provided between the first-level second sub-convergence node 810 and the regional pipeline 100.

[0181] In some embodiments, a secondary first sub-confluence node is provided on the secondary first outflow pipeline 190, the secondary first sub-confluence node is connected to the primary first sub-confluence node 710, and a tertiary first outflow pipeline is provided between the secondary first sub-confluence node and the regional pipeline 100; a secondary second sub-confluence node is provided on the secondary second outflow pipeline 190a, the secondary second sub-confluence node is connected to the primary second sub-confluence node 810, and a tertiary second outflow pipeline is provided between the secondary second sub-confluence node and the regional pipeline 100.

[0182] In the above embodiment, the positions of the first confluence node 700, the first-level first sub-confluence node 710, and the second-level first sub-confluence node can be set to enhance the effect of uniform liquid flow.

[0183] In the above embodiment, along the arrangement direction of the multiple sub-regions 22, two adjacent sub-regions (22) are connected to the same first bus node 700, and the first bus node 700 is arranged adjacent to the sub-region 22 close to the joint 23. Along the arrangement direction of the multiple sub-regions 22, two adjacent sub-regions 22 are connected to the same first shunt node 400, and the first shunt node 400 is arranged adjacent to the sub-region 22 away from the joint 23.

[0184] by Figure 3 Taking the example shown as an example, the first sub-area 22c1 and the second sub-area 22c2 share a first shunt node 400 and a first confluence node 700, and the third sub-area 22c3 and the fourth sub-area 22c4 share a first shunt node 700 and a first confluence node 700. Here, by setting the first shunt node 400 away from the first sub-area 22c1 or the third sub-area 22c3 and setting the first confluence node 700 close to the first sub-area 22c1 or the third sub-area 22c3, the influence of distance and flow resistance on the liquid flow rate can be reduced.

[0185] For example, in the second embodiment, please refer to Figure 3 , the number of sub-regions 22c in the first partition 22d is at least one more than the number of first shunt nodes 400; the number of sub-regions 22c in the second partition 22e is at least one more than the number of second shunt nodes 500.

[0186] In this second embodiment, a more flexible pipeline structure can be formed. Figure 3 For example, the first sub-region 22c1, the second sub-region 22c2 and the third sub-region 22c3 can share a first diversion node 400, and the fourth sub-region 22c4 can use a first diversion node 400 alone. By matching the number of sub-regions 22c and the first diversion nodes 400, the liquid flow rate flowing into each sub-region 22c can be more consistent.

[0187] In the above embodiment, various situations in which the number of the first flow diversion nodes 400 and the number of the sub-regions 22c are different are described. It can be seen from the above description that the purpose of uniform flow diversion can be achieved by reasonably configuring the number of liquid flows in each sub-region 22c, and by reasonably configuring the positions of the first flow diversion node 400, the second flow diversion node 500, the first confluence node 700, the second confluence node 800 and each sub-confluence node and sub-flow diversion node.

[0188] In some embodiments, please refer to Figure 3The joint 23 is arranged in the first partition 22d, so that the liquid flow can flow more easily to each sub-area 22c in the first partition 22d. In order to balance the influence of the distance and the flow resistance, a plurality of first shunt nodes 400 can be arranged in sequence along a position away from the joint 23, and a plurality of second shunt nodes 500 can be arranged in sequence along a position close to the joint 23. In other words, the first shunt nodes 400 can be farther away from the joint 23 as a whole, a plurality of first confluence nodes 700 can be arranged in sequence along a position close to the joint 23, and a plurality of second confluence nodes 800 can be arranged in sequence along a position away from the joint 23. In other words, the first confluence nodes can be closer to the joint 23 as a whole.

[0189] The above arrangement can ensure that the liquid flow rates in the first partition 22d and the second partition 22e are consistent, wherein the multiple first branch nodes 400 arranged on the first liquid inlet pipeline 210 are farther away from the joint 23 than the multiple second branch nodes 500 on the second liquid inlet pipeline 220, so that the liquid can basically reach the first sub-region 22c1 and the fifth sub-region 22c5 at the same time point, and then flow from the first sub-region 22c1 to the second sub-region 22c2, the third sub-region 22c3 and the fourth sub-region 22c4 in turn, or flow from the fifth sub-region 22c5 to the sixth sub-region 22c6, the seventh sub-region 22c7 and the eighth sub-region 22c8 in turn.

[0190] According to the above embodiments, the main function of the first circulation pipeline 110 and the second circulation pipeline 140 is to dissipate heat for the battery cell group 10. At the same time, the first liquid outlet pipeline 310 and the second liquid outlet pipeline 320 are arranged at the edge of the cold plate 20. The liquid after dissipating heat for the battery cell group 10 will flow to the first liquid outlet pipeline 310 and the second liquid outlet pipeline 320. This part of the liquid has a high proportion of gas phase, and the heat dissipation capacity drops sharply, so that the edge of the battery cell group 10 cannot be well cooled, and the problem of local overtemperature may easily occur.

[0191] In this regard, in some embodiments, please refer to Figure 3 A peripheral pipeline 900 is further provided between the first liquid inlet pipeline 210 and the second liquid inlet pipeline 220. The peripheral pipeline 900 is provided around the first partition 22d and / or the second partition 22e, and the peripheral pipeline 900 is connected between the liquid inlet 23a and the liquid outlet 23b.

[0192] The edge pipeline 900 is connected between the liquid inlet 23a and the liquid outlet 23b. The edge pipeline 900 can surround the edge of each sub-area 22c, and the liquid in the edge pipeline 900 cannot flow to the first circulation pipeline 110 and the second circulation pipeline 140. The edge pipeline 900 only dissipates heat at the edge of each sub-area 22c, which can prevent high temperature from occurring at the edge of the battery cell group 10.

[0193] In some embodiments, please refer to Figure 3 The edge pipeline 900 includes an edge inlet pipeline 910 and an edge outlet pipeline 920. The edge inlet pipeline 910 is arranged between the first liquid inlet pipeline 210 and the second liquid inlet pipeline 220. The edge outflow pipeline 920 includes a first edge outflow pipeline 921 and a second edge outflow pipeline 922. The first edge outflow pipeline 921 is arranged at the edge of the first partition 22d, and the second edge outflow pipeline 922 is arranged at the edge of the second partition 22e.

[0194] The edge inflow pipe 910 can be set in the stagnation zone 21 of the cold plate 20. When the liquid flows through the edge inflow pipe 910, the loss of the liquid's heat dissipation capacity can be reduced. The first edge outflow pipe 921 and the second edge outflow pipe 922 can respectively dissipate heat for the edges of the first partition 22d and the second partition 22e.

[0195] In some embodiments, please refer to Figure 3 The edge inflow conduit 910 includes a first edge inflow conduit 911 and a second edge inflow conduit 912 , and the first edge inflow conduit 911 and the second edge inflow conduit 912 are alternately arranged to form a spoiler structure 930 that can block the liquid.

[0196] The first edge inflow pipeline 911 can be directly connected to the liquid inlet 23a, or can be formed by branching from the first liquid inlet pipeline 210, and the second edge inflow pipeline 912 can be directly connected to the liquid inlet 23a, or can be formed by branching from the second liquid inlet pipeline 220. When the latter is adopted, the staggered arrangement of the first edge inflow pipeline 911 and the second edge inflow pipeline 912 can extend the distance of the liquid and increase the flow resistance, so that the first edge inflow pipeline 911 and the second edge inflow pipeline 912 branch less liquid from the first liquid inlet pipeline 210 and the second liquid inlet pipeline 220, so that more liquid can flow to the first partition 22d and the second partition 22e, thereby ensuring the heat dissipation effect of each battery cell group 10.

[0197] In some embodiments, please refer to Figure 3 There may be multiple spoiler structures 930 , and the spoiler structure 930 may include a converging section 931 and a diverting section 932 .

[0198] The confluence section 931 is formed by the confluence of the first edge inflow pipeline 911 and the second edge inflow pipeline 912. After the first edge inflow pipeline 911 and the second edge inflow pipeline 912 converge to form the confluence section 931, they can be separated again to form the first edge inflow pipeline 911 and the second edge inflow pipeline 912, and the positions of the first edge inflow pipeline 911 and the second edge inflow pipeline 912 are interchanged, thereby achieving the purpose of increasing the flow resistance on the basis of extending the distance.

[0199] In the above embodiment, the spoiler structure 930 may be designed as a chain-type structure.

[0200] In other embodiments, the spoiler structure 930 can also be implemented in other ways. For example, the first edge inflow pipe 911 and the second edge inflow pipe 912 can be arranged in parallel, and at the same time, a baffle or other structure that can prevent the flow of liquid can be respectively arranged in the first edge inflow pipe 911 and the second edge inflow pipe 912. The baffle forms the spoiler structure 930, which can achieve the purpose of increasing the flow resistance.

[0201] For other embodiments, please refer to Figure 3 The first edge inflow pipeline 911 and the second edge inflow pipeline 912 can be arranged in a curved manner to form a curved circuitous section 901. For example, by designing them into a wave shape, the purpose of extending the distance can be achieved.

[0202] In other embodiments, the first edge inflow conduit 911 and the second edge inflow conduit 912 may be configured to be wavy, and baffles may be provided inside the first edge inflow conduit 911 and the second edge inflow conduit 912, thereby increasing the flow resistance while extending the distance.

[0203] In combination with the foregoing, in some embodiments, please refer to Figure 2 A module partition area 22f is provided on the cold plate body 22, and the module partition areas 22f are arranged in a crisscross manner. The liquid inlet pipeline 200 and the liquid outlet pipeline 300 are provided in the module partition area 22f, and the module partition area 22f is the stagnation cooling area 21 mentioned above. The module partition area 22f corresponds to the interval between each battery cell group 10. When the liquid flows through the liquid inlet pipeline 200 and the liquid outlet pipeline 300 provided on the module partition area 22f, the loss of the heat dissipation capacity of the liquid can be reduced, thereby ensuring the heat dissipation effect of the liquid on the battery cell group 10 on each sub-area 22c.

[0204] In an embodiment of the present application, the lengths of the flow paths of the multiple liquid flow channels show a second increasing trend along the arrangement direction of the sub-regions 22; and / or, the number of branch lines of the regional pipelines 100 arranged in each sub-region 22c forms a first increasing trend that is compatible with the second increasing trend.

[0205] The second increasing trend here means that in the direction away from the joint 23, the lengths of the liquid flow channels corresponding to each sub-region 22c are in an increasing relationship. This increase can be a linear increase or a nonlinear increase. In order to balance this increasing relationship of length, the embodiment of the present application can balance the problem of different flow resistances caused by different lengths by arranging the number of diversion lines according to the first increasing trend, thereby achieving the purpose of uniform flow of liquid to each sub-region 22c.

[0206] In some embodiments, the length of the first circulation pipeline 110 shows a decreasing trend along the arrangement direction of the multiple sub-regions 22c, and / or the first circulation pipeline 110 of each sub-region 22c includes at least one first sub-circulation pipeline 101, and the length of the first sub-circulation pipeline 101 shows a decreasing trend along the arrangement direction of the sub-regions 22c.

[0207] By making the length of the first circulation pipeline 110 or the first sub-circulation pipeline 101 form a decreasing trend, the increase in the flow path length caused by the arrangement of each sub-region 22c can be balanced, which is beneficial to balancing the comprehensive flow resistance of the liquid flow to each sub-region 22c and helping the liquid to flow evenly to each sub-region 22c.

[0208] In some embodiments, along the arrangement direction of the multiple sub-regions 22c, the diameter of the first circulation pipeline 110 shows a third increasing trend, and / or, the first circulation pipeline 110 of each sub-region 22c includes at least one first sub-circulation pipeline 101, and along the arrangement direction of the sub-regions 22c, the diameter of the first sub-circulation pipeline 101 shows a third increasing trend.

[0209] by Figure 3 Taking the first partition 22d in the example, the flow resistance to the third sub-region 22c3 and the fourth sub-region 22c4 can be reduced by setting the pipe diameter as above, so that more liquid flows to the third sub-region 22c3 and the fourth sub-region 22c4, which plays an important role in balancing the liquid flow.

[0210] In some embodiments, along the arrangement direction of the multiple sub-regions 22, the arrangement gap of the first circulation pipeline 110 shows a fourth increasing trend, and / or, the first circulation pipeline 110 of each sub-region 22c includes at least one first sub-circulation pipeline 101, and along the arrangement direction of the sub-region 22c, the arrangement gap of the first sub-circulation pipeline 101 forms a fourth increasing trend.

[0211] In combination with the foregoing, the first circulation pipeline 110 is arranged in the respective sub-areas 22c in a bending and circuitous manner. The arrangement gap here can be the interval along the X direction of each circuitous section of the first circulation pipeline 110 or the first sub-circulation pipeline 101 (first sub-circulation pipeline 101) during the bending and circuitous process. By setting the gap, the density relationship of the first circulation pipeline 110 or the first sub-circulation pipeline 101 (first sub-circulation pipeline 101) in the sub-area 22c can be changed, wherein the first circulation pipeline 110 or the first sub-circulation pipeline 101 (first sub-circulation pipeline 101) close to the joint 23 can be relatively dense, and the first circulation pipeline 110 or the first sub-circulation pipeline 101 (first sub-circulation pipeline 101) away from the joint 23 can be relatively sparse, thereby balancing the flow resistance problem caused by the flow path, and allowing the liquid to flow evenly to various sub-areas 22c.

[0212] Furthermore, in one embodiment of the present application, in order to further simplify the design, the second increasing trend, the third increasing trend and the fourth increasing trend can be matched with the first increasing trend. In addition, in other embodiments, the second increasing trend, the third increasing trend and the fourth increasing trend can also be determined according to specific needs.

[0213] In order to more clearly understand the main content of the embodiments of the present application, the structure of the cold plate 20 will be systematically described below based on a part of the above embodiments. In this part of the embodiments, the cold plate 20 is a rectangular structure, and a first sub-region 22c1, a second sub-region 22c2, a third sub-region 22c3, a fourth sub-region 22c4, a fifth sub-region 22c5, a sixth sub-region 22c6, a seventh sub-region 22c7 and an eighth sub-region 22c8 are provided on the cold plate 20, and a module separation area 22f is formed between each sub-region 22c of the cold plate 20. The first liquid inlet pipeline 210, the second liquid inlet pipeline 220, the first edge inflow pipeline 911 and the second edge inflow pipeline 912 are centrally arranged on the cold plate 20 along the Y direction and extend along the X direction. Two first flow diversion nodes 400 are arranged on the first liquid inlet pipeline 210, and two second flow diversion nodes 500 are arranged on the second liquid inlet pipeline 220. The first sub-region 22c1 and the second sub-region 22c2 share a first flow diversion node 400, the third sub-region 22c3 and the fourth sub-region 22c4 share a first flow diversion node 400, the fifth sub-region 22c5 and the sixth sub-region 22c6 share a second flow diversion node 500, and the seventh sub-region 22c7 and the eighth sub-region 22c8 share a second flow diversion node 500. Two first confluence nodes 700 are arranged on the first liquid outlet pipeline 310, and two second confluence nodes 800 are arranged on the second liquid outlet pipeline 320. For ease of understanding, the first liquid outlet pipeline 310 and the second liquid outlet pipeline 320 are combined to form a first confluence node 700. Figures 3 to 8 Provide explanation.

[0214] Figure 4 Shows Figure 3 Pipeline layout diagram of the first sub-area; Figure 5 Shows Figure 3 Pipeline layout diagram of the second sub-area; Figure 6 Shows Figure 3 Pipeline layout diagram of the third sub-area; Figure 7 Shows Figure 3 Pipeline layout diagram of the fourth sub-area; Figure 8 Shows Figure 3 Piping layout diagram of the middle edge area.

[0215] First, please refer to Figure 3 and Figure 4 For the first sub-area 22c1, the liquid flows from the first liquid inlet pipeline 210 through the first diversion node 400 and then enters the first-level first sub-diversion node 410 from the first-level first inlet pipeline 120. After being diverted from the first-level first sub-diversion node 410, the liquid flows into the first circulation pipeline 110 from both ends along the two second-level first inlet pipelines 170, and then flows through the second-level first outflow pipeline 190 and the first confluence outlet 112 (where the first-level first sub-confluence node 710 is provided) and then flows into the first-level first outflow pipeline 130, and finally flows through the first confluence node 700 to the first liquid outlet pipeline 310.

[0216] The first circulation pipelines 110 are arranged in a curved and circuitous manner, extending from both ends along the Y direction, extending to the edge of the Y direction, then turning back and extending in the opposite direction to the Y direction, so that the first circulation pipelines 110 are arranged at intervals in the X direction.

[0217] Next, please refer to Figure 3 and Figure 5 For the second sub-area 22c2, the liquid flows from the first liquid inlet pipeline 210 through the first diversion node 400 and then enters the first-level first sub-diversion node 410 from the first-level first inlet pipeline 120. After being diverted from the first-level first sub-diversion node 410, the liquid flows into the first circulation pipeline 110 from both ends along the two second-level first inlet pipelines 170, and then flows through the second-level first outflow pipeline 190 and the first confluence outlet 112 (where the first-level first sub-confluence node 710 is provided) and then flows into the first-level first outflow pipeline 130, and finally flows through the first confluence node 700 to the first liquid outlet pipeline 310.

[0218] Next, please refer to Figure 3 and Figure 6, is an example of 4 diversion lines, with 2 diversion lines on the left and right sides, and for the third sub-area 22c3, the liquid flows from the first liquid inlet pipeline 210 through the first diversion node 400 and then enters the first-level first inflow pipeline 120 to the first-level first sub-diversion node 410. After being diverted from the first-level first sub-diversion node 410, the liquid flows along the two second-level first inflow pipelines 170 from the connecting pipelines 600 at both ends (the connecting pipeline 600 connects the two first sub-circulation pipelines 101) into the first circulation pipeline 110, and then passes through the connecting pipeline 600 at the tail (the connecting pipeline 600 connects the four first sub-circulation pipelines 101) through the first confluence outlet 112 and flows into the first-level first outflow pipeline 130, and finally flows through the first confluence node 700 to the first liquid outlet pipeline 310.

[0219] Next, please refer to Figure 3 and Figure 7 , is an example of 8 diversion lines, with 4 diversion lines on the left and right sides. For the fourth sub-area 22c4, the liquid flows from the first liquid inlet pipeline 210 through the first diversion node 400 and then enters the first-level first inflow pipeline 120 to the first-level first sub-diversion node 410. After being diverted from the first-level first sub-diversion node 410, it flows along the two second-level first inflow pipelines 170 from the connecting pipelines 600 at both ends (the connecting pipelines connect the four first sub-circulation pipelines 101) into the first circulation pipeline 110. The middle position of the stroke of the first circulation pipeline 110 is set There are two connecting pipes 600, which can correspond to a connecting pipe 600 at the end, so that the four liquid flows on the left can be converged into two and then continue to be transported. At this time, the four first sub-circulation pipes 101 on the left are converged into two first sub-circulation pipes 101, and then pass through the tail connecting pipe 600 (the connecting pipe 600 connects the four first sub-circulation pipes 101) through the first confluence outlet 112 and then flow into the first-level first outflow pipe 130, and finally pass through the first confluence node 700 to flow to the first liquid outlet pipe 310.

[0220] In the third sub-region 22c3 and the fourth sub-region 22c4, the structures of the connecting pipeline 600 are different. In the third sub-region 22c3, the connecting pipeline 600 is used to connect two parallel pipelines, and in the fourth sub-region 22c4, the connecting pipeline 600 is used to connect four parallel pipelines. In addition, it can be understood that the function of the connecting pipeline 600 can also be achieved by using a diverter and a branch. For example, at the head, the connecting pipeline 600 can be replaced with a second-level first sub-diverter node and a third-level first inflow pipeline. The tail can be set in the same way, which will not be repeated.

[0221] In the above description, the number of shunt lines in the first sub-area 22c1 and the second sub-area 22c2 is the same, both are two, the number of shunt lines in the third sub-area 22c3 is four, and the number of shunt lines in the fourth sub-area 22c4 is eight. Through this incremental increase in number, the liquid flow can flow evenly to each sub-area 22c.

[0222] Finally, please refer to reference 3 and Figure 8 The liquid flows from the first edge inflow pipe 911 and the second edge inflow pipe 912 to the first edge outflow pipe 921 and the second edge outflow pipe 922 , which can dissipate heat well on the edge of the battery cell group 10 .

[0223] The pipeline settings in the fifth sub-area 22c5, the sixth sub-area 22c6, the seventh sub-area 22c7 and the eighth sub-area 22c8 can refer to the first sub-area 22c1, the second sub-area 22c2, the third sub-area 22c3 and the fourth sub-area 22c4 respectively, and will not be repeated.

[0224] It should be noted that Figure 4 For a detailed description of the first sub-region 22c1, it is applicable to the case of setting a first-level first sub-dividing node 410. Figure 3 This is an overall description of the multiple possibilities of the first sub-area 22c2, which is applicable to the case where the first-level first sub-diversion node 410 is set, and also to the case where the first-level first sub-diversion node 410 is not set. Therefore, the setting positions of the first-level first outflow pipeline 130 and the second-level first outflow pipeline 190 should be correctly understood.

[0225] In addition, the number of levels from the first liquid inlet pipeline 210 to the first circulation pipeline 110 and from the first liquid outlet pipeline 210 to the first circulation pipeline 110 can be flexibly selected, for example, Figure 3 In the example shown, for the first sub-division 22c1 and the second sub-division 22c2, by setting the first diversion node 400 and the first-level first sub-diversion node 410, the number of levels from the first liquid inlet pipeline 210 to the first circulation pipeline 110 is 2, and by setting the first confluence node 700 and the first-level first sub-confluence node 710, the number of levels from the first liquid outlet pipeline 210 to the first circulation pipeline 110 is also 2; for another example, for the third sub-division 22c3 and the fourth sub-division 22c4, by setting the first diversion node 400 and the first-level first sub-division node 410, the number of levels from the first liquid inlet pipeline 210 to the first circulation pipeline 110 is 2, and by setting the first confluence node 700 and the connecting pipeline 600, the number of levels from the first liquid outlet pipeline 210 to the first circulation pipeline 110 is 1.

[0226] Finally, according to the description of the above related embodiments, it can be known that the connecting pipeline 600 can play the role of diversion or confluence, and it can be directly connected to the first circulation pipeline 110 to improve the integrity of the first circulation pipeline 110.

[0227] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0228] In the description of the present application, it should be understood that the terms "including" and "having" and any variations thereof used in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatuses.

[0229] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, it can also be a detachable connection, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can make 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 this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. 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.

[0230] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cold plate (20), characterized in that: include: A cold plate body (22), the cold plate body (22) comprising a plurality of sub-areas (22c), wherein the sub-areas (22c) are provided with regional pipelines (100); and a joint (23), the joint (23) being connected to one side of the cold plate body (22), the joint (23) comprising a liquid inlet (23a) and a liquid outlet (23b), the liquid inlet (23a) and the liquid outlet (23b) being connected to a regional pipeline (100) in the sub-region (22c), the plurality of sub-regions (22) being arranged in a direction away from the joint (23), The regional pipeline (100) in each of the sub-regions (22c) is respectively connected to the liquid inlet (23a) and the liquid outlet (23b) to form a liquid flow channel, and the number of branch lines of the regional pipeline (100) arranged in each of the sub-regions (22c) presents a first increasing trend along the arrangement direction of the sub-regions (22).

2. The cold plate (20) according to claim 1, characterized in that The cold plate body (22) is formed with a liquid inlet pipeline (200) and a liquid outlet pipeline (300), the liquid inlet (23a) is located at one end of the liquid inlet pipeline (200), the liquid outlet (23b) is located at one end of the liquid outlet pipeline (300), and a plurality of sub-areas (22c) are connected in parallel between the liquid inlet pipeline (200) and the liquid outlet pipeline (300).

3. The cold plate (20) according to claim 2, characterized in that At least one partition is formed on the cold plate body (22), and a plurality of sub-areas (22c) are connected in parallel within the partition.

4. The cold plate (20) according to claim 3, characterized in that The cold plate body (22) is provided with a first partition (22d), a plurality of sub-regions (22c) are provided in the first partition (22d), the plurality of sub-regions (22) are arranged in a direction away from the joint (23), the liquid inlet pipeline (200) includes a first liquid inlet pipeline (210), the liquid outlet pipeline (300) includes a first liquid outlet pipeline (310), and the plurality of sub-regions (22c) in the first partition (22d) are connected in parallel between the first liquid inlet pipeline (210) and the first liquid outlet pipeline (310).

5. The cold plate (20) according to claim 4, characterized in that A plurality of first flow dividing nodes (400) are arranged on the first liquid inlet pipeline (210), and the number of the first flow dividing nodes (400) is consistent with the number of the sub-regions (22c) in the first partition (22d).

6. The cold plate (20) according to claim 5, characterized in that The regional pipeline (100) in each of the sub-regions (22c) in the first partition (22d) comprises a first circulation pipeline (110), X first-level inflow pipelines (120) branched from the first flow branching node (400), and at least one first-level outflow pipeline (130) connected to the first liquid outlet pipeline (310), Wherein, X is a positive integer greater than or equal to 2.

7. The cold plate (20) according to claim 6, characterized in that The first circulation pipeline (110) comprises X first liquid flow inlets (111) and at least one first confluence outlet (112), the first-level first inflow pipeline (120) is correspondingly connected to the first liquid flow inlet (111), and the first-level first outflow pipeline (130) is connected to the first confluence outlet (112), wherein, arranged in a direction away from the joint (23), the X in the sub-region (22c) presents a first increasing trend.

8. The cold plate (20) according to claim 7, characterized in that The first circulation pipeline (110) includes X1 first liquid flow inlets (111) and at least one first confluence outlet (112); the cold plate body (22) is further formed with a connecting pipeline for connecting at least two of the first liquid flow inlets (111); the first-level first inflow pipeline (120) is connected to the first liquid flow inlet (111) through at least one connecting pipeline; the first-level first outflow pipeline (130) is connected to the first confluence outlet (112); X1 is a positive integer greater than X; and, arranged in a direction away from the joint (23), X1 in the sub-area (22c) presents a first increasing trend.

9. The cold plate (20) according to claim 6, characterized in that A first-level first sub-dividing node is also provided on the first-level first inflow pipeline (120), and the first-level first sub-dividing node is connected to the first diverting node (400). A second-level first inflow pipeline is provided between the first-level first sub-dividing node (410) and the first liquid flow inlet (111).

10. The cold plate (20) according to claim 6, characterized in that The first liquid outlet pipeline (310) is provided with a first confluence node (700), and the number of the first confluence nodes (700) is consistent with the number of the sub-areas (22c) in the first partition (22d).

11. The cold plate (20) according to claim 10, characterized in that The first-level first outflow pipeline (130) is provided with a first-level first sub-confluence node, the first-level first sub-confluence node is connected to the first confluence node (700), and a second-level first outflow pipeline is provided between the first-level first sub-confluence node and the first circulation pipeline (110).

12. The cold plate (20) according to claim 4, characterized in that A plurality of first flow dividing nodes (400) are arranged on the first liquid inlet pipeline (210), and the number of the first flow dividing nodes (400) is less than the number of the sub-regions (22c) in the first partition (22d).

13. The cold plate (20) according to claim 12, characterized in that The number of the sub-areas (22c) in the first partition (22d) is n times the number of the first shunt nodes (400), Wherein, n is a positive integer greater than or equal to 2.

14. The cold plate (20) according to claim 12, characterized in that The regional pipelines (100) in each of the sub-regions (22c) in the first partition (22d) each include a first circulation pipeline (110), a primary first inflow pipeline (120) branched from the first flow branching node (400), Y secondary first inflow pipelines (170) branched from each of the primary first inflow pipelines (120), and at least one primary first outflow pipeline (130) connected to the first liquid outlet pipeline (310), Wherein, Y is a positive integer greater than or equal to 2.

15. The cold plate (20) according to claim 14, characterized in that The first circulation pipeline (110) includes Y first liquid flow inlets (111) and at least one first confluence outlet (112), the secondary first inflow pipeline (170) is correspondingly connected to the first liquid flow inlet (111), and the primary first outflow pipeline (130) is connected to the first confluence outlet (112), wherein, arranged in a direction away from the joint (23), the Y in the sub-area (22c) presents a first increasing trend.

16. The cold plate (20) according to claim 14, characterized in that The first circulation pipeline (110) includes Y1 first liquid flow inlets (111) and at least one first confluence outlet (112); the cold plate body (22) is also formed with a connecting pipeline (600) for connecting at least two of the first liquid flow inlets (111); the secondary first inflow pipeline (170) is connected to the first liquid flow inlet (111) through at least one connecting pipeline (600); the primary first outflow pipeline (130) is connected to the first confluence outlet (112); Y1 is a positive integer greater than Y; and, arranged in a direction away from the joint (23), Y1 in the sub-region (22c) presents a first increasing trend.

17. The cold plate (20) according to claim 14, characterized in that The first-level first inflow pipeline (120) is also provided with a first-level first sub-dividing node (410), and the second-level first inflow pipeline (170) is connected between the first-level first sub-dividing node (410) and the first circulation pipeline (110).

18. The cold plate (20) according to claim 17, characterized in that The secondary first inflow pipeline (170) is also provided with a secondary first sub-dividing node, the secondary first sub-dividing node is connected to the primary first sub-dividing node (410), and a tertiary first inflow pipeline is provided between the secondary first sub-dividing node and the first circulation pipeline (110).

19. The cold plate (20) according to claim 14, characterized in that The first liquid outlet pipeline (310) is provided with first confluence nodes (700), and the number of the first confluence nodes (700) is consistent with the number of the first diversion nodes (400).

20. The cold plate (20) according to claim 19, characterized in that A first-level first sub-confluence node (710) is provided on the first-level first outflow pipeline (130), the first-level first sub-confluence node (710) is connected to the first confluence node (700), and a second-level first outflow pipeline (190) is provided between the first-level first sub-confluence node (710) and the regional pipeline (100).

21. The cold plate (20) according to claim 19, characterized in that Along the arrangement direction of the plurality of sub-regions (22), two adjacent sub-regions (22) are connected to the same first bus node (700), and the first bus node (700) is arranged adjacent to the sub-region (22) close to the joint (23).

22. The cold plate (20) according to claim 20, characterized in that The secondary first outflow pipeline (190) is provided with a secondary first sub-confluence node, the secondary first sub-confluence node is connected to the primary first sub-confluence node (710), and a tertiary first outflow pipeline is provided between the secondary first sub-confluence node and the regional pipeline (100).

23. The cold plate (20) according to any one of claims 13 to 22, characterized in that Along the arrangement direction of the plurality of sub-regions (22), two adjacent sub-regions (22) are connected to the same first shunt node (400), and the first shunt node (400) is arranged adjacent to the sub-region (22) far from the joint (23).

24. The cold plate (20) according to claim 12, characterized in that The number of the sub-areas (22c) in the first partition (22d) is at least one more than the number of the first diversion nodes (400).

25. The cold plate (20) according to any one of claims 6-11, 14-22, characterized in that: The first flow pipeline (110) of each of the sub-areas (22) comprises two first sub-flow pipelines (101), each of the first sub-flow pipelines (101) has a first liquid flow inlet (111), and the first confluence outlet (112) is located between the first liquid flow inlets (111) of the two first sub-flow pipelines (101) (110).

26. The cold plate (20) according to any one of claims 4 to 22, characterized in that The cold plate body (22) further comprises a second partition (22e) arranged at intervals along a first direction on one side of the first partition (22d); a plurality of sub-regions (22c) are arranged in the second partition (22e); the liquid inlet pipeline (200) comprises a second liquid inlet pipeline (220); the liquid outlet pipeline (300) comprises a second liquid outlet pipeline (320); the plurality of sub-regions (22c) in the second partition (22e) are connected in parallel between the second liquid inlet pipeline (220) and the second liquid outlet pipeline (320); and the first direction is perpendicular to the direction in which the plurality of sub-regions (22c) are arranged.

27. The cold plate (20) according to claim 26, characterized in that The first liquid inlet pipeline (210) is provided with a plurality of first flow dividing nodes (400), the second liquid inlet pipeline (220) is provided with a plurality of second flow dividing nodes (500), the first liquid outlet pipeline (310) is provided with a plurality of first flow confluence nodes (700), and the second liquid outlet pipeline (320) is provided with a plurality of second flow confluence nodes (800).

28. The cold plate (20) according to claim 26, characterized in that An edge pipeline (900) is also provided between the first liquid inlet pipeline (210) and the second liquid inlet pipeline (220); the edge pipeline (900) is provided around the first partition (22d) and / or the second partition (22e); the edge pipeline (900) is connected between the liquid inlet (23a) and the liquid outlet (23b).

29. The cold plate (20) according to claim 28, characterized in that The edge pipeline (900) comprises an edge inflow pipeline (910) and an edge outflow pipeline (920), wherein the edge inflow pipeline (910) is arranged between the first liquid inlet pipeline (210) and the second liquid inlet pipeline (220), and the edge outflow pipeline (920) comprises a first edge outflow pipeline (921) and a second edge outflow pipeline (922), wherein the first edge outflow pipeline (921) is arranged at the edge of the first partition (22d), and the second edge outflow pipeline (922) is arranged at the edge of the second partition (22e).

30. The cold plate (20) according to claim 29, characterized in that The edge inflow pipeline (910) comprises a first edge inflow pipeline (911) and a second edge inflow pipeline (912), wherein the first edge inflow pipeline (911) and the second edge inflow pipeline (912) are arranged in an interlaced manner to form a flow-disturbing structure (930) capable of blocking liquid.

31. The cold plate (20) according to claim 30, characterized in that There are a plurality of flow-disrupting structures (930), and each of the flow-disrupting structures (930) comprises a converging section (931) and a diverting section (932).

32. The cold plate (20) according to claim 30, characterized in that The first edge inflow pipeline (911) and / or the second edge inflow pipeline (912) are provided with a curved and circuitous section.

33. The cold plate (20) according to any one of claims 2 to 22, characterized in that The cold plate body (22) is provided with a module separation area (22f) for isolating each of the sub-areas (22c); the module separation areas (22f) are arranged in a crisscross pattern; and the liquid inlet pipeline (200) and the liquid outlet pipeline (300) are arranged in the module separation area (22f).

34. The cold plate (20) according to any one of claims 2 to 22, characterized in that The lengths of the flow paths of the plurality of liquid flow channels present a second increasing trend along the arrangement direction of the sub-regions (22); and / or the number of branch lines of the regional pipelines (100) arranged in each of the sub-regions (22c) forms a first increasing trend that is compatible with the second increasing trend.

35. The cold plate (20) according to any one of claims 6-11, 14-22, characterized in that Along the arrangement direction of the plurality of sub-regions (22c), the length of the first circulation pipeline (110) shows a decreasing trend, and / or the first circulation pipeline (110) of each of the sub-regions (22c) includes at least one first sub-circulation pipeline (101), and along the arrangement direction of the sub-regions (22c), the length of the first sub-circulation pipeline (101) shows a decreasing trend.

36. The cold plate (20) according to any one of claims 6-11, 14-22, characterized in that Along the arrangement direction of the plurality of sub-regions (22c), the diameter of the first circulation pipeline (110) presents a third increasing trend, and / or the first circulation pipeline (110) of each of the sub-regions (22c) includes at least one first sub-circulation pipeline (101), and along the arrangement direction of the sub-regions (22c), the diameter of the first sub-circulation pipeline (101) presents a third increasing trend.

37. The cold plate (20) according to any one of claims 6-11, 14-22, characterized in that Along the arrangement direction of the plurality of sub-regions (22c), the arrangement gap of the first circulation pipeline (110) presents a fourth increasing trend, and / or the first circulation pipeline (110) of each of the sub-regions (22c) includes at least one first sub-circulation pipeline (101), and along the arrangement direction of the sub-regions (22c), the arrangement gap of the first sub-circulation pipeline (101) presents a fourth increasing trend.

38. The cold plate (20) according to any one of claims 6-11, 14-22, characterized in that The first flow pipeline (110) includes a plurality of first sub-flow pipelines (101), and each of the first sub-flow pipelines forms a first liquid flow inlet (111).

39. A battery pack, characterized in that: The invention comprises a battery cell group (10) and a cold plate (20) according to any one of claims 1 to 38.

40. An electrical device, characterized in that: It comprises an electrical device and the battery pack as claimed in claim 39, wherein the battery pack is used to provide electrical energy to the electrical device.

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