Cold plate, battery pack and electric equipment

Abstract

The utility model provides a cold plate, a battery pack and electric equipment, the cold plate comprises a first unit, and the first unit is provided with an end flow channel; the second unit is internally provided with a straight flow channel; in the extension direction of the straight flow channel, at least one second unit is spliced with the first unit, so that the straight flow channel is communicated with the end flow channel, the size of the cold plate in the extension direction of the straight flow channel is increased, and the universality of the cold plate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration, and specifically relates to a cold plate, a battery pack and electrical equipment. Background Art

[0002] When a cold plate is used to cool batteries in a battery pack, if the arrangement of the batteries in the battery pack changes, the structure of the cold plate needs to be changed.

[0003] Each cold plate requires a separate mold, and changes in the cold plate structure require additional molds to re-manufacture the cold plate, which increases the manufacturing cost and affects the versatility of the cold plate. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a cold plate, a battery pack and an electrical device.

[0005] According to a first aspect of the utility model, a cold plate is provided for cooling a battery, comprising:

[0006] a first unit having an end flow passage therein;

[0007] at least one second unit, wherein the second unit has a direct current path therein;

[0008] In the extension direction of the direct flow channel, at least one of the second units is spliced ​​with the first unit, so that the direct flow channel is connected with the end flow channel.

[0009] Optionally, the cold plate includes a plurality of second units, which are arranged along the extension direction of the direct current channel and connected in sequence to form a second unit group, wherein, along the extension direction of the direct current channel, the second unit at at least one end of the second unit group is connected to the first unit.

[0010] Optionally, the cold plate comprises:

[0011] substrate;

[0012] The flow channel plate comprises an end plate and at least one intermediate plate, wherein the end plate is connected to the base plate to form the first unit, the intermediate plate is connected to the base plate to form the second unit, and the intermediate plate is spliced ​​with the end plate.

[0013] Optionally, the end plate comprises a first end plate and a second end plate, the first end plate is connected to the base plate and forms a first end flow channel with the base plate, and the second end plate is connected to the base plate and forms a second end flow channel with the base plate;

[0014] At least one of the intermediate plates is disposed between the first end plate and the second end plate, and a direct current channel is formed between the intermediate plate and the base plate, wherein the direct current channel is connected between the first end channel and the second end channel.

[0015] Optionally, the first end plate and the second end plate are arranged relatively spaced apart, and the first end plate and the second end plate are used to be opposite to two ends of the battery;

[0016] At least one of the middle plates is disposed between the first end plate and the second end plate to be opposite to the middle of the battery.

[0017] Optionally, the flow channel plate includes a first end plate and two second end plates;

[0018] Two second end plates are symmetrically arranged on both sides of the first end plate, and a first area is formed between one second end plate and the first end plate, and a second area is formed between another second end plate and the first end plate;

[0019] The plurality of intermediate plates include a plurality of first-type intermediate plates and a plurality of second-type intermediate plates. The plurality of first-type intermediate plates are arranged side by side in the first area, and the plurality of second-type intermediate plates are arranged side by side in the second area.

[0020] Optionally, the first end plate has a first end region and a second end region, the first end region and the first region form a first heat exchange region, and the second end region and the second region form a second heat exchange region;

[0021] The first heat exchange region and the second heat exchange region are used to exchange heat between two batteries.

[0022] Optionally, the two second end plates are used to be opposite to two ends of the battery.

[0023] Optionally, the cold plate has a length dimension and a width dimension, and the length dimension of the cold plate is greater than the width dimension;

[0024] The first end plate and the second end plate are spaced apart in the length direction of the cold plate, and the plurality of direct current channels are parallel to the length direction of the cold plate;

[0025] Alternatively, the first end plate and the second end plate are spaced apart in the width direction of the cold plate, and the plurality of direct current channels are parallel to the width direction of the cold plate.

[0026] Optionally, a plurality of first direct current channels are formed between the intermediate plate close to the first end plate and the base plate, and the plurality of first direct current channels are arranged at equal intervals;

[0027] The first end flow channel is a bent flow channel, and one end of the first end flow channel is connected to one of the first straight flow channels, and the other end of the first end flow channel is connected to another of the first straight flow channels.

[0028] Optionally, a plurality of second direct current channels are formed between the middle plate close to the second end plate and the base plate, and the plurality of second direct current channels are arranged at equal intervals;

[0029] The second end flow channel is a bent flow channel, and one end of the second end flow channel is communicated with one of the second straight flow channels, and the other end of the second end flow channel is communicated with another of the second straight flow channels.

[0030] Optionally, it further includes a connecting member, through which adjacent intermediate plates are connected; and / or, the first end plate and the intermediate plate are connected through the connecting member; and / or, the second end plate and the intermediate plate are connected through the connecting member.

[0031] Optionally, the overlapping width between the connecting member and the intermediate plate is in the range of 5-15 mm.

[0032] Optionally, it further comprises a joint, the joint has a first port and a second port, and the first end flow channel has a first liquid inlet and a first liquid outlet;

[0033] The joint is connected to the first end plate, and the first port is communicated with the first liquid inlet, and the second port is communicated with the first liquid outlet;

[0034] Alternatively, the second end flow channel has a second liquid inlet and a second liquid outlet;

[0035] The joint is connected to the second end plate, and the first port is communicated with the second liquid inlet, and the second port is communicated with the second liquid outlet.

[0036] Optionally, the first end flow channel includes a first converging flow channel and a first diverging flow channel, the inlet end of the first diverging flow channel is connected to the first converging flow channel, and the outlet end of the first diverging flow channel is connected to the straight flow channel;

[0037] The second end flow channel includes a second converging flow channel and a second branching flow channel, the inlet end of the second branching flow channel is connected to the second converging flow channel, and the outlet end of the second branching flow channel is connected to the straight flow channel.

[0038] According to a second aspect of the present invention, a battery pack is provided, comprising a battery and the cold plate described in the first aspect, wherein the cold plate is used to cool the battery.

[0039] According to a third aspect of the present invention, there is provided an electrical device comprising the battery pack described in the second aspect.

[0040] A technical effect of the utility model is:

[0041] An embodiment of the present application provides a cold plate, which includes a first unit, the first unit having an end flow channel; at least one second unit, the second unit having a direct flow channel; in the extension direction of the direct flow channel, at least one second unit is spliced ​​with the first unit to connect the direct flow channel with the end flow channel, so as to increase the size of the cold plate in the extension direction of the direct flow channel, thereby improving the versatility of the cold plate.

[0042] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0044] Figure 1 A three-dimensional diagram of a cold plate provided in one embodiment of the utility model;

[0045] Figure 2 A top view of a cold plate provided in one embodiment of the utility model;

[0046] Figure 3 A three-dimensional diagram of another cold plate provided in one embodiment of the utility model;

[0047] Figure 4 A top view of another cold plate provided in one embodiment of the utility model;

[0048] Figure 5 A three-dimensional diagram of another cold plate provided in one embodiment of the utility model;

[0049] Figure 6 A top view of another cold plate provided in one embodiment of the utility model;

[0050] Figure 7 A three-dimensional diagram of another cold plate provided by an embodiment of the utility model;

[0051] Figure 8 A top view of another cold plate provided in one embodiment of the utility model;

[0052] Fig. 9 A three-dimensional diagram of a cold plate (including connectors) provided for one embodiment of the utility model;

[0053] Fig.10 A top view of a cold plate (including connectors) provided for one embodiment of the utility model;

[0054] Fig.11 A schematic diagram of the cooperation between a flow channel plate and a connecting piece of a cold plate provided by an embodiment of the utility model;

[0055] Fig.12 An exploded view of a cold plate provided in one embodiment of the utility model.

[0056] Among them: 1. substrate; 2. flow channel plate; 21. first end plate; 211. first end flow channel; 22. second end plate; 221. second end flow channel; 23. middle plate; 231. direct current channel; 232. first direct current channel; 233. second direct current channel; 3. connector; 4. joint. DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0058] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0059] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0060] 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", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0063] The cold plate provided in the embodiment of the present application is used to cool the battery. Cold plates with different structures are set by combining multiple intermediate plates in the flow channel plate, and the multiple intermediate plates can be formed by a unified mold, avoiding multiple mold openings of multiple cold plates. The manufacturing cost of the cold plate is reduced by eliminating the multiple mold opening processes, the production cycle of the cold plate is shortened, and the versatility of the cold plate is increased.

[0064] Specifically, when the cold plate is used to cool the battery, through different settings of the flow channel plates in the cold plate, multiple intermediate plates can be matched with batteries in different arrangements, thereby ensuring the cooling efficiency of the cold plate.

[0065] The embodiment of the present application provides a cold plate for cooling a battery, the cold plate comprising:

[0066] a first unit having an end flow passage therein;

[0067] at least one second unit, wherein the second unit has a direct current channel 231;

[0068] In the extension direction of the direct flow channel 231 , at least one of the second units is spliced ​​with the first unit, so that the direct flow channel 231 is connected with the end flow channel.

[0069] In this embodiment, the battery includes at least one battery cell. For example, the battery may be a whole battery cell group, that is, a plurality of battery cells, or the battery may be a single battery cell.

[0070] In this embodiment, the first unit is located at the end of the cold plate to provide cooling medium for the cold plate through the end flow channel; the second unit has a direct current channel 231, and the second unit is spliced ​​with the first unit in the extension direction of the direct current channel 231 to increase the size of the cold plate in the extension direction of the direct current channel 231.

[0071] In one embodiment, the cold plate includes a plurality of second units, and the plurality of second units have the same structure, so the plurality of second units can be formed by the same mold. For example, the plurality of second units have the same length and width, and the number, size and spacing of the direct current channels 231 on each second unit are also the same; and the size of the plurality of second units is greatly reduced relative to the size of the entire cold plate, so that the size of the mold for manufacturing the second units can be reduced, simplifying the molding process of the second units, and lowering the requirements for the molding equipment for forming the direct current channels 231 on the second units.

[0072] The cold plate provided in the embodiment of the present application includes a first unit, which has an end flow channel; at least one second unit, which has a direct flow channel 231; in the extension direction of the direct flow channel 231, at least one second unit is spliced ​​with the first unit so that the direct flow channel 231 is connected with the end flow channel to increase the size of the cold plate in the extension direction of the direct flow channel 231, simplify the forming process of the cold plate, and improve the versatility of the cold plate.

[0073] In one embodiment, the cold plate includes a plurality of second units, which are arranged along the extension direction of the direct current channel 231 and connected in sequence to form a second unit group, wherein the second unit at at least one end of the second unit group is connected to the first unit along the extension direction of the direct current channel 231. Based on the above structural setting, the area and length of the direct current zone of the cold plate can be increased by simply increasing the number of second units, thereby adapting to batteries or battery packs of different sizes.

[0074] In one embodiment, the cold plate may further include an intermediate harmonica tube and an end flow channel tube. The intermediate harmonica tube is connected to the end flow channel tube. The intermediate harmonica tube is the second unit, and the end flow channel tube is the first unit. Further, a plurality of intermediate harmonica tubes may be provided, and the plurality of intermediate harmonica tubes are arranged and connected along the extension direction of the direct flow channel. The end flow channel tube may be a manifold, that is, connected to the water inlet and outlet. In addition, the end flow channel tube may be a collecting tube, which is used to connect different intermediate harmonica tubes arranged along the second direction. The second direction is perpendicular to the extension direction along the direct flow channel.

[0075] In one embodiment, the cold plate comprises:

[0076] substrate1;

[0077] The flow channel plate 2 includes an end plate and at least one intermediate plate 23, wherein the end plate is connected to the base plate 1 to form the first unit, and the intermediate plate 23 is connected to the base plate 1 and spliced ​​with the end plate to form the second unit.

[0078] In this embodiment, the substrate 1 may be a flat plate. When the cold plate is used to cool the battery, the substrate 1 may be in contact with the battery. The flat surface of the substrate 1 may be used to improve the fit between the cold plate and the battery.

[0079] The end plate and multiple intermediate plates 23 in the flow channel plate can be formed of metal plates through a stamping process to form uneven grooves on the end plate and the multiple intermediate plates 23; when the uneven grooves formed on the end plate and the multiple intermediate plates 23 are connected to the same side surface of the substrate 1, the bent grooves on the end plate can form an end flow channel between the substrate 1, and the straight grooves on the multiple intermediate plates 23 can form multiple direct current channels 231 between the substrate 1, so that when the end flow channel and the direct current channel 231 are connected, the size of the cold plate in the extension direction of the direct current channel 231 is increased, thereby simplifying the forming process of the cold plate.

[0080] In addition, in another embodiment, the substrate 1 may also be provided with a plurality of independent sub-substrates, each of which is respectively connected to the end plate and the middle plate 23. That is, the sub-substrate is connected to the end plate to form an independent first unit, and the sub-substrate is connected to the middle plate 23 to form an independent second unit. The first unit is connected to the second unit.

[0081] In one embodiment, referring to Figure 1 and Fig.12 The end plate includes a first end plate 21 and a second end plate 22. The first end plate 21 is connected to the substrate 1 and forms a first end flow channel 211 with the substrate 1. The second end plate 22 is connected to the substrate 1 and forms a second end flow channel 221 with the substrate 1.

[0082] At least one of the intermediate plates 23 is disposed between the first end plate 21 and the second end plate 22 , and a direct current channel 231 is formed between the intermediate plate 23 and the base plate 1 , and the direct current channel 231 is connected between the first end channel 211 and the second end channel 221 .

[0083] In this embodiment, the cold plate may include a plurality of intermediate plates 23, which are arranged side by side between the first end plate 21 and the second end plate 22, and a direct current channel 231 is formed between each intermediate plate 23 and the base plate 1, and the plurality of direct current channels 231 are connected between the first end channel 211 and the second end channel 221.

[0084] The first end plate 21, the second end plate 22 and the multiple intermediate plates 23 in the flow channel plate can be formed of metal plates through a stamping process to form grooves on the first end plate 21, the second end plate 22 and the multiple intermediate plates 23; when the grooves formed on the first end plate 21, the second end plate 22 and the multiple intermediate plates 23 are connected to the same side surface of the substrate 1, the bent groove on the first end plate 21 can form a first end flow channel 211 between the substrate 1, the bent groove on the second end plate 22 can form a second end flow channel 221 between the substrate 1, and the straight grooves on the multiple intermediate plates 23 can form multiple direct flow channels 231 between the substrate 1.

[0085] Multiple direct current channels 231 are correspondingly connected between the first end channel 211 and the second end channel 221. For example, one end of a direct current channel 231 is correspondingly connected to one end of the first end channel 211, and the other end of a direct current channel 231 is correspondingly connected to one end of the second end channel 221, so as to form a continuous flow channel on the same side surface of the substrate 1. When a cooling medium is passed into the flow channel, the heat of the battery can be absorbed by the cooling medium to ensure that the temperature of the battery is within a safe operating range.

[0086] Multiple direct current channels 231 are correspondingly connected between the first end channel 211 and the second end channel 221. The direct current channel 231 can be directly connected between the first end channel 211 and the second end channel 221, or the direct current channel 231 located between two direct current channels 231 can be first connected to the direct current channels 231 on both sides, and then respectively connected to the first end channel 211 and the second end channel 221 through the direct current channels 231 on both sides.

[0087] In one embodiment, one side surface of the substrate 1 can cooperate with the flow channel plate 2 to form a flow channel on one side surface of the substrate 1, while the other side surface of the substrate 1 is a plane to facilitate the fitting of the cold plate and the battery; in another embodiment, both side surfaces of the substrate 1 can cooperate with two flow channel plates 2 respectively to form flow channels on both side surfaces of the substrate 1, thereby improving the cooling efficiency of the cold plate on the battery.

[0088] In this embodiment, the structures of the multiple intermediate plates 23 are the same, and the multiple intermediate plates 23 can be formed by the same mold. For example, the length and width of the multiple intermediate plates 23 are the same, and the number, size and spacing of the linear grooves on each intermediate plate 23 are also the same; and the size of the multiple intermediate plates 23 is greatly reduced relative to the size of the entire cold plate, so that the size of the mold for manufacturing the intermediate plates 23 can be reduced, which simplifies the molding process of the intermediate plates 23 and has lower requirements for the stamping equipment for forming the grooves on the intermediate plates 23.

[0089] In this embodiment, a plurality of intermediate plates 23 are arranged side by side between the first end plate 21 and the second end plate 22. The length of the direct current channel 231 can be increased by increasing the number of intermediate plates 23 to adapt to the design requirements of cold plates of different sizes, thereby improving the versatility of the cold plate.

[0090] In one embodiment, see Figure 1 The first end plate 21 and the second end plate 22 at both ends of the cold plate can be common areas in different cold plates, so as to be used for the diversion and merging of the flow channels in the cold plates; and the area formed by splicing multiple intermediate plates 23 is a combination area, and the intermediate plates 23 in this area can be formed by only one stamping die. According to the battery grouping method, the number and arrangement of the intermediate plates 23 in the combination area can be adjusted accordingly, that is, a set of molds is used to produce multiple intermediate plates 23 for combination, and a variety of different forms of cold plates can be obtained to match different battery combination structures.

[0091] In this embodiment, when the cold plate is formed, the first end plate 21, the second end plate 22 and the plurality of intermediate plates 23 are arranged on the base plate 1 and then preliminarily fixed. The preliminarily fixing method may be hole positioning or riveting positioning. Then the first end plate 21, the second end plate 22 and the plurality of intermediate plates 23 are welded to the base plate 1 to ensure the sealing of the flow channel and the structural stability of the cold plate.

[0092] In one embodiment, see Figure 1 and Figure 2 The first end plate 21 and the second end plate 22 are arranged opposite to each other and spaced apart from each other. The first end plate 21 and the second end plate 22 are used to be opposite to two ends of the battery;

[0093] At least one middle plate 23 is disposed between the first end plate 21 and the second end plate 22 to be opposite to the middle of the battery.

[0094] In this embodiment, a plurality of intermediate plates 23 are disposed between the first end plate 21 and the second end plate 22 , so that the size and flow channel layout of the cold plate can be optimized by adjusting the number of the intermediate plates 23 and the arrangement of the intermediate plates 23 .

[0095] When the cold plate cools the battery, the first end plate 21 and the second end plate 22 at both ends of the cold plate are opposite to the two ends of the battery. The temperature of the two ends of the battery is higher during charging and discharging. The first end flow channel 211 formed between the first end plate 21 and the substrate 1 has a plurality of first bending positions, and the second end flow channel 221 formed between the second end plate 22 and the substrate 1 has a plurality of second bending positions, so that the cooling medium in the first end flow channel 211 and the second end flow channel 221 is buffered by the first bending positions and the second bending positions, so as to improve the cooling efficiency at the first end plate 21 and the second end plate 22 at both ends of the cold plate, and ensure the cooling effect of the cold plate on the battery.

[0096] In one embodiment, see Figure 3 and Figure 4 , the flow channel plate 2 includes a first end plate 21 and two second end plates 22;

[0097] The two second end plates 22 are symmetrically arranged on both sides of the first end plate 21, and a first area is formed between one second end plate 22 and the first end plate 21, and a second area is formed between the other second end plate 22 and the first end plate 21;

[0098] The intermediate plates 23 include a plurality of first-type intermediate plates and a plurality of second-type intermediate plates. The plurality of first-type intermediate plates are arranged side by side in the first area, and the plurality of second-type intermediate plates are arranged side by side in the second area.

[0099] In this embodiment, the two second end plates 22 are located at both ends of the cold plate, the first end plate 21 is located in the middle of the cold plate, and the intermediate plate 23 is arranged between the second end plate 22 and the first end plate 21 to form an arrangement of the second end plate 22, the intermediate plate 23, the first end plate 21, the intermediate plate 23 and the second end plate 22.

[0100] In one embodiment, the first end plate 21 has a first end region and a second end region, the first end region and the first region form a first heat exchange region, and the second end region and the second region form a second heat exchange region;

[0101] The first heat exchange region and the second heat exchange region are used to exchange heat between two battery cells.

[0102] In this embodiment, the cold plate can be used to cool the upper and lower rows of batteries, corresponding to Figure 4 In the cold plate, the two ends of the upper row of batteries can be respectively opposite to the second end plate 22 at the upper end of the cold plate and the upper half of the first end plate 21, and the two ends of the lower row of batteries can be respectively opposite to the second end plate 22 at the lower end of the cold plate and the lower half of the first end plate 21, so as to ensure the cooling effect of the cold plate on the batteries through the second end plate 22 and the first end plate 21.

[0103] In this embodiment, the upper and lower rows of batteries are arranged horizontally, and the cooling medium flows into the flow channel from the middle joint of the cold plate. The cooling medium first flows through the lower end of the upper row of batteries and the upper end area of ​​the lower row of batteries, and then flows from the middle area of ​​the batteries to the upper end of the upper row of batteries and the lower end area of ​​the lower row of batteries, and finally flows back to the joint to ensure the cooling effect of the battery ends.

[0104] In another embodiment, the two second end plates 22 are used to be opposite to the two ends of the battery, and the first end plate 21 is used to be opposite to the middle of the battery, that is, the cold plate cools a row of batteries, and when the heat generation in the middle position of the battery increases, the battery can be quickly cooled down by the cooling medium between the first end plate 21 and the substrate 1; multiple intermediate plates 23 are arranged between the first end plate 21 and the second end plate 22 to be opposite to the transition area of ​​the battery, and the transition area of ​​the battery is the area between the two ends and the middle of the battery.

[0105] In one embodiment, the cold plate has a length dimension and a width dimension, the length dimension of the cold plate being greater than the width dimension;

[0106] The first end plate 21 and the second end plate 22 are spaced apart in the length direction of the cold plate, and the plurality of direct current channels 231 are parallel to the length direction of the cold plate;

[0107] Alternatively, the first end plate 21 and the second end plate 22 are spaced apart in the width direction of the cold plate, and the plurality of direct current channels 231 are parallel to the width direction of the cold plate.

[0108] In one embodiment, see Figure 1 The length direction of the cold plate is the X direction, and the width direction of the cold plate is the Y direction. The length dimension of the cold plate in the length direction is greater than the width dimension of the cold plate in the width direction. The first end plate 21 and the second end plate 22 are spaced apart in the length direction of the cold plate. A plurality of intermediate plates 23 are arranged side by side between the first end plate 21 and the second end plate 22, and a plurality of direct current channels 231 are parallel to the length direction of the cold plate, so that the direct current channels 231 connect the first end channel 211 and the second end channel 221, forming a continuous combined channel in the cold plate, thereby improving the flexibility and versatility of the cold plate design while ensuring the cooling efficiency of the cold plate.

[0109] In another embodiment, see Figure 3 The length direction of the cold plate is the X direction, the width direction of the cold plate is the Y direction, the length dimension of the cold plate in the length direction is greater than the width dimension of the cold plate in the width direction, the first end plate 21 and the second end plate 22 are arranged at intervals in the width direction of the cold plate, and multiple intermediate plates 23 are arranged side by side between the first end plate 21 and the second end plate 22, and the multiple first direct current channels 232 and the multiple second direct current channels 233 are parallel to the width direction of the cold plate, and a continuous combined flow channel can also be formed in the cold plate to ensure the cooling efficiency of the cold plate.

[0110] In one embodiment, see Figure 3 and Figure 4 , three intermediate plates 23 are arranged side by side between the first end plate 21 and the second end plate 22 to form a first intermediate plate group, and two first intermediate plate groups are arranged between the first end plate 21 and the second end plate 22 to cool the two groups of batteries accordingly; in another embodiment, see Figure 5 and Figure 6 , two intermediate plates 23 are arranged side by side between the first end plate 21 and the second end plate 22 to form a set of second intermediate plate groups, and two second intermediate plate groups are arranged between the first end plate 21 and the second end plate 22 to cool the two groups of batteries accordingly; see Figure 7 and Figure 8 , an intermediate plate 23 is disposed between the first end plate 21 and the second end plate 22 , and two intermediate plates 23 are disposed between the first end plate 21 and the second end plate 22 to cool the two groups of batteries accordingly.

[0111] In one embodiment, see Figure 3 and Figure 4 , a plurality of first direct current channels 232 are formed between the intermediate plate 23 close to the first end plate 21 and the base plate 1, and the plurality of first direct current channels 232 are arranged at equal intervals;

[0112] The first end flow channel 211 is a bent flow channel, for example, the first end flow channel 211 is U-shaped or V-shaped, and one end of the first end flow channel 211 is connected to a first straight flow channel 232 , and the other end of the first end flow channel 211 is connected to another first straight flow channel 232 .

[0113] In this embodiment, the cooling medium in the cold plate can flow into the first end flow channel 211 through the joint, and then flow to the first direct flow channel 232 after being bent and transported in the first end flow channel 211; in the case of multiple first end flow channels 211, the cooling medium in one first direct flow channel 232 can flow to another first direct flow channel 232 through the other end of the first end flow channel 211 after flowing into one end of the first end flow channel 211, so as to realize the transportation of the medium between the first end flow channel 211 and the first direct flow channel 232, thereby ensuring the cooling efficiency of the cold plate.

[0114] In one embodiment, see Figure 3 and Figure 4 A plurality of second direct current channels 233 are formed between the intermediate plate 23 close to the second end plate 22 and the base plate 1, and the plurality of second direct current channels 233 are arranged at equal intervals;

[0115] The second end channel 221 is a bent channel, for example, the second end channel 221 is U-shaped or V-shaped, and one end of the second end channel 221 is connected to a second straight channel 233 , and the other end of the second end channel 221 is connected to another second straight channel 233 .

[0116] In this embodiment, when the cooling medium in the cold plate flows toward the edge of the cold plate through the second direct flow channel 233, it can be turned through the second end flow channel 221, that is, it flows to the second direct flow channel 233 after being bent and transported in the second end flow channel 221; in the case of multiple second end flow channels 221, the cooling medium in one second direct flow channel 233 can flow to another second direct flow channel 233 through the other end of the second end flow channel 221 after flowing into one end of the second end flow channel 221, so as to realize the transportation of the medium between the second end flow channel 221 and the second direct flow channel 233, and ensure the continuous bending and extension of the flow channel in the cold plate.

[0117] In one embodiment, see Figures 9 to 11 The cold plate further includes a connector 3, and adjacent intermediate plates 23 are connected via the connector 3; and / or, the first end plate 21 and the intermediate plate 23 are connected via the connector 3; and / or, the second end plate 22 and the intermediate plate 23 are connected via the connector 3.

[0118] In this embodiment, when adjacent middle plates 23 are connected, the adjacent middle plates 23 can be butt-jointed together first, and the gap between the adjacent middle plates 23 is less than or equal to 0.5 mm; a portion of the connecting piece 3 overlaps with the middle plate 23 on one side, and another portion of the connecting piece 3 overlaps with the middle plate 23 on the other side, and then the connecting piece 3 is welded or bonded to the adjacent middle plates 23, and the direct current channels 231 on the adjacent middle plates 23 are relatively connected to ensure the sealing between the direct current channels 231 on the adjacent middle plates 23.

[0119] In one embodiment, the first end plate 21 and the middle plate 23 may also be connected by a connector 3, and the second end plate 22 and the middle plate 23 may also be connected by a connector 3 to ensure the balance and stability of the connection strength between the plates on the cold plate.

[0120] In one embodiment, the overlapping width between the connecting member 3 and the middle plate 23 is in the range of 5-15 mm.

[0121] In this embodiment, the overlapping width is the overlapping dimension in the direction perpendicular to the direct current channel 231, and the overlapping width between the connecting member 3 and any adjacent intermediate plates 23 can be equal to ensure the connection strength between the adjacent intermediate plates 23 on the basis of achieving sealing between the adjacent intermediate plates 23.

[0122] In one embodiment, see Fig.12 , the cold plate further comprises a joint 4, the joint 4 has a first port and a second port, and the first end flow channel 211 has a first liquid inlet and a first liquid outlet;

[0123] The connector 4 is connected to the first end plate 21, and the first port is connected to the first liquid inlet, and the second port is connected to the first liquid outlet;

[0124] Alternatively, the second end flow channel 221 has a second liquid inlet and a second liquid outlet;

[0125] The connector 4 is connected to the second end plate 22 , and the first port is communicated with the second liquid inlet, and the second port is communicated with the second liquid outlet.

[0126] In this embodiment, the connector can connect the pipeline providing cooling medium in the electrical equipment and the flow channel in the cold plate, so that the cooling medium can enter and flow out of the flow channel in the cold plate through the channel in the connector; and the first port and the second port are located on the same side of the cold plate to improve the convenience of pipeline connection on the cold plate.

[0127] In one embodiment, the cold plate further comprises a first joint and a second joint, the first end flow channel 211 has a liquid inlet, and the second end flow channel 221 has a liquid outlet;

[0128] The first joint is connected to the first side of the first end plate 21, and the first joint is communicated with the liquid inlet; the second joint is connected to the second side of the first end plate 21, and the second joint is communicated with the liquid outlet; and the second side of the first end plate 21 is a side of the first end plate 21 that is opposite to the first side, so that the first joint and the second joint are respectively arranged on both sides of the cold plate to simplify the layout of the flow channel on the cold plate.

[0129] In one embodiment, the first end flow channel 211 includes a first converging flow channel and a first diverging flow channel, the inlet end of the first diverging flow channel is connected to the first converging flow channel, and the outlet end of the first diverging flow channel is connected to the straight flow channel 231;

[0130] The second end flow channel 221 includes a second converging flow channel and a second branch flow channel, the inlet end of the second branch flow channel is connected to the second converging flow channel, and the outlet end of the second branch flow channel is connected to the straight flow channel 231, so as to divert the cooling medium flowing into the first end flow channel 211 to multiple straight flow channels 231, and at the same time divert the cooling medium flowing into the second end flow channel 221 to multiple straight flow channels 231, thereby improving the cooling efficiency of the cold plate.

[0131] An embodiment of the present application further provides a battery pack, which includes a battery and the above-mentioned cold plate, and the cold plate is used to cool the battery.

[0132] In this embodiment, the flow channel plate 2 is arranged on the first surface of the substrate 1, and the second surface of the substrate 1 away from the first surface is a plane, and the second surface contacts the battery. The flat surface of the substrate 1 is used to improve the fit between the cold plate and the battery, thereby ensuring the cooling efficiency of the cold plate on the battery.

[0133] An embodiment of the present application also provides an electrical device, which includes the above-mentioned battery pack.

[0134] In this embodiment, the electrical device may be a vehicle or an energy storage device.

[0135] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cold plate for cooling a battery, characterized in that: include: a first unit having an end flow passage therein; at least one second unit, wherein the second unit has a direct current path (231); In the extension direction of the direct flow channel (231), at least one of the second units is spliced ​​with the first unit, so that the direct flow channel (231) is connected with the end flow channel.

2. The cold plate according to claim 1, characterized in that The cold plate comprises a plurality of the second units, which are arranged along the extension direction of the direct current channel (231) and are sequentially connected to form a second unit group, wherein, along the extension direction of the direct current channel (231), the second unit at at least one end of the second unit group is connected to the first unit.

3. The cold plate according to claim 1 or 2, characterized in that: The cold plate comprises: base(1); A flow channel plate (2), the flow channel plate (2) comprising an end plate and at least one intermediate plate (23), the end plate being connected to the base plate (1) to form the first unit, the intermediate plate (23) being connected to the base plate (1) to form the second unit, the intermediate plate being spliced ​​with the end plate.

4. The cold plate according to claim 3, characterized in that The end plate comprises a first end plate (21) and a second end plate (22); the first end plate (21) is connected to the base plate (1) and forms a first end flow channel (211) with the base plate (1); the second end plate (22) is connected to the base plate (1) and forms a second end flow channel (221) with the base plate (1); At least one of the intermediate plates (23) is disposed between the first end plate (21) and the second end plate (22), and a direct flow channel (231) is formed between the intermediate plate (23) and the base plate (1), and the direct flow channel (231) is connected between the first end flow channel (211) and the second end flow channel (221).

5. The cold plate according to claim 4, characterized in that The first end plate (21) and the second end plate (22) are arranged relative to each other with a spacing therebetween, and the first end plate (21) and the second end plate (22) are used to be opposite to two ends of the battery; At least one intermediate plate (23) is disposed between the first end plate (21) and the second end plate (22) so as to be opposite to the middle of the battery.

6. The cold plate according to claim 4, characterized in that The flow channel plate (2) comprises a first end plate (21) and two second end plates (22); The two second end plates (22) are symmetrically arranged on both sides of the first end plate (21), and a first area is formed between one of the second end plates (22) and the first end plate (21), and a second area is formed between the other of the second end plates (22) and the first end plate (21); The intermediate plates (23) include a plurality of first-type intermediate plates and a plurality of second-type intermediate plates. The plurality of first-type intermediate plates are arranged side by side in the first area, and the plurality of second-type intermediate plates are arranged side by side in the second area.

7. The cold plate according to claim 6, characterized in that The first end plate (21) has a first end region and a second end region, the first end region and the first region form a first heat exchange region, and the second end region and the second region form a second heat exchange region; The first heat exchange region and the second heat exchange region are used to exchange heat between two batteries.

8. The cold plate according to claim 6, characterized in that The two second end plates (22) are used to be opposite to two ends of the battery.

9. The cold plate according to claim 4, characterized in that The cold plate has a length dimension and a width dimension, and the length dimension of the cold plate is greater than the width dimension; The first end plate (21) and the second end plate (22) are arranged at intervals in the length direction of the cold plate, and the plurality of direct current channels (231) are parallel to the length direction of the cold plate; Alternatively, the first end plate (21) and the second end plate (22) are arranged at intervals in the width direction of the cold plate, and the plurality of direct current channels (231) are parallel to the width direction of the cold plate.

10. The cold plate according to claim 4, characterized in that A plurality of first direct current channels (232) are formed between the intermediate plate (23) close to the first end plate (21) and the base plate (1), and the plurality of first direct current channels (232) are arranged at equal intervals; The first end flow channel (211) is a bent flow channel, and one end of the first end flow channel (211) is connected to one of the first straight flow channels (232), and the other end of the first end flow channel (211) is connected to another of the first straight flow channels (232).

11. The cold plate according to claim 4, characterized in that A plurality of second direct current channels (233) are formed between the intermediate plate (23) close to the second end plate (22) and the base plate (1), and the plurality of second direct current channels (233) are arranged at equal intervals; The second end flow channel (221) is a bent flow channel, and one end of the second end flow channel (221) is connected to one of the second straight flow channels (233), and the other end of the second end flow channel (221) is connected to another of the second straight flow channels (233).

12. The cold plate according to claim 4, characterized in that It also includes a connecting piece (3), and adjacent intermediate plates (23) are connected by the connecting piece (3); and / or the first end plate (21) and the intermediate plate (23) are connected by the connecting piece (3); and / or the second end plate (22) and the intermediate plate (23) are connected by the connecting piece (3).

13. The cold plate according to claim 12, characterized in that The overlapping width between the connecting member (3) and the intermediate plate (23) is in the range of 5-15 mm.

14. The cold plate according to claim 4, characterized in that It also includes a connector (4), wherein the connector (4) has a first port and a second port; The first end flow channel (211) has a first liquid inlet and a first liquid outlet; The joint (4) is connected to the first end plate (21), and the first port is communicated with the first liquid inlet, and the second port is communicated with the first liquid outlet; Alternatively, the second end flow channel (221) has a second liquid inlet and a second liquid outlet; The joint (4) is connected to the second end plate (22), and the first port is in communication with the second liquid inlet, and the second port is in communication with the second liquid outlet.

15. The cold plate according to claim 4, characterized in that The first end flow channel (211) comprises a first converging flow channel and a first diverging flow channel, the inlet end of the first diverging flow channel is connected to the first converging flow channel, and the outlet end of the first diverging flow channel is connected to the straight flow channel (231); The second end flow channel (221) comprises a second converging flow channel and a second diverging flow channel, wherein the inlet end of the second diverging flow channel is connected to the second converging flow channel, and the outlet end of the second diverging flow channel is connected to the straight flow channel (231).

16. A battery pack, characterized in that: The invention comprises a battery and the cold plate according to any one of claims 1 to 15, wherein the cold plate is used for cooling the battery.

17. An electrical equipment, characterized in that: A battery pack comprising the battery pack of claim 16.

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