Connector assembly, direct cooling plate assembly and battery pack

Abstract

The utility model provides a connector assembly, a direct cooling plate assembly and a battery pack, which are used for improving the temperature uniformity of a direct cooling plate and avoiding the problem that local battery cells are damaged due to too high temperature. In the connector assembly, the inlet channel is provided with a first inlet and a gas branch connector, the first inlet is formed in the outer surface of the connector assembly, the gas branch connector is opposite to the first inlet, the first outlet channel and the connecting channel are both communicated with the gas branch connector, the first outlet channel is located on the bottom side of the gas branch connector, and the connecting channel is located on the top side of the gas branch connector. The second outlet channel communicates with the connecting channel and is spaced from the first outlet channel.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a joint assembly, a direct cooling plate assembly and a battery pack. Background Art

[0002] In the process of heat dissipation of battery cells by existing direct cooling plates, after the liquid refrigerant enters the flow channel, most of the liquid refrigerant evaporates into gaseous refrigerant at the front end of the flow channel, resulting in the rear end of the flow channel being basically gaseous refrigerant. The temperature of the gaseous refrigerant is relatively high, and the temperature difference with the battery cell is relatively small. The heat exchange between the gaseous refrigerant and the battery cell is relatively small, which will cause the local battery cell temperature to be high, and the battery cell is prone to overheating and damage. Utility Model Content

[0003] The present application provides a joint assembly, a direct cooling plate assembly and a battery pack, which are used to improve the temperature uniformity of the direct cooling plate and avoid the problem of local battery cells being damaged due to high temperature.

[0004] In a first aspect, the present application provides a joint assembly, the joint assembly being provided with an inlet channel, a first outlet channel, a connecting channel, and a second outlet channel;

[0005] The inlet channel has a first inlet and a gas separation interface, the first inlet is arranged on the outer surface of the joint assembly, and the gas separation interface is arranged opposite to the first inlet;

[0006] The first outlet channel and the connecting channel are both communicated with the gas separation interface, the first outlet channel is located on the bottom side of the gas separation interface, the first outlet channel has a first outlet facing away from the gas separation interface, the first outlet is arranged on the outer surface of the joint assembly, the connecting channel is located on the top side of the gas separation interface, the second outlet channel is communicated with the connecting channel, and is spaced apart from the first outlet channel.

[0007] The joint assembly is further provided with a third outlet channel, and the third outlet channel is spaced apart from the inlet channel, the first outlet channel, the connecting channel and the second outlet channel.

[0008] Wherein, the joint assembly comprises a first joint and a second joint, and the second joint is installed on one side of the first joint;

[0009] The connecting channel comprises a first sub-connecting channel and a second sub-connecting channel, the first sub-connecting channel is communicated with the gas separation interface, and the second sub-connecting channel is communicated with the first sub-connecting channel and the second outlet channel;

[0010] The outlet channel, the first outlet channel and the first sub-connecting channel are all arranged at the first joint, and the second sub-connecting channel and the second outlet channel are all arranged at the second joint.

[0011] Wherein, the first joint is provided with a positioning hole, the opening of which is located on the surface of the first joint facing the second joint, the second joint is provided with a positioning column, the positioning column is provided on the surface of the second joint facing the first joint, and the positioning column is inserted into the positioning hole;

[0012] Alternatively, the first joint is provided with a positioning column, which is arranged on the surface of the first joint facing the second joint, and the second joint is provided with a positioning hole, the opening of the positioning hole is arranged on the surface of the second joint facing the first joint, and the positioning column is inserted into the positioning hole.

[0013] Wherein, the positioning column is loosely matched with the positioning hole, and the first joint and the second joint are fixedly connected.

[0014] Wherein, the first outlet channel has a first outlet facing away from the gas separation interface, and the first outlet is arranged on the outer surface of the joint assembly;

[0015] The second outlet channel has a second outlet facing away from the connecting channel. The second outlet is arranged on the outer surface of the joint assembly and is spaced apart from the first outlet.

[0016] In a second aspect, the present application provides a direct cooling plate assembly, comprising a direct cooling plate and any of the above-mentioned joint assemblies;

[0017] The direct cooling plate is provided with a first flow channel, a second flow channel, a third inlet and a fourth inlet, the first flow channel and the second flow channel are both located inside the direct cooling plate and are spaced apart from each other, the third inlet is communicated with the first flow channel, the fourth inlet is spaced apart from the second inlet and is communicated with the second flow channel;

[0018] The joint assembly is installed on the direct cooling plate, the first outlet channel is communicated with the third inlet, and the second outlet is communicated with the fourth inlet.

[0019] Wherein, the first flow channel is arranged around the second flow channel.

[0020] The direct cooling plate is further provided with a third flow channel and a fourth outlet, the third flow channel is located inside the direct cooling plate and is connected to the first flow channel and the second flow channel, the fourth outlet is spaced from the second inlet and the second inlet, and is connected to the third flow channel;

[0021] The third outlet channel of the joint assembly is in communication with the fourth outlet.

[0022] Wherein, along the extension direction of the first flow channel, the third inlet is connected to one end of the first flow channel, and the third flow channel is connected to the other end of the first flow channel;

[0023] And / or, along the extension direction of the second flow channel, the fourth inlet is connected to one end of the second flow channel, and the third flow channel is connected to the other end of the second flow channel.

[0024] Among them, the direct cooling plate includes a flow channel plate and a cover plate, the cover plate is provided with the third inlet and the fourth inlet, the third inlet and the fourth inlet both penetrate the cover plate along the thickness direction of the cover plate, the cover plate is installed on the flow channel plate, and is enclosed with the flow channel plate to form the first flow channel and the second flow channel.

[0025] In a third aspect, the present application provides a battery pack, comprising any of the above-mentioned direct cooling plate assemblies and a battery, wherein the battery is in contact with the direct cooling plate.

[0026] In the direct cooling plate assembly shown in the present application, the direct cooling plate is designed with two refrigerant inlets, the third inlet and the fourth inlet. The joint assembly can separate the external two-phase refrigerant into liquid refrigerant and gaseous refrigerant. The liquid refrigerant enters the first flow channel of the direct cooling plate from the third inlet, and the gaseous refrigerant enters the second flow channel of the direct cooling plate from the fourth inlet. At this time, most of the front end of the direct cooling plate is liquid refrigerant, and the liquid refrigerant cools most of the direct cooling plate, and the gaseous refrigerant cools the rest of the direct cooling plate. The gaseous refrigerant can neutralize the problem of overheating of the refrigerant at the rear end of the direct cooling plate, effectively improve the temperature uniformity of the direct cooling plate, and avoid the problem of local battery cells being damaged due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0028] Figure 1 It is a schematic diagram of the structure of the battery pack provided by this application;

[0029] Figure 2 yes Figure 1 A schematic diagram of the structure of a direct cooling plate assembly in the battery pack shown;

[0030] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the direct cooling plate assembly shown;

[0031] Figure 4 yes Figure 3 A schematic diagram of the structure of a direct cooling plate in a direct cooling plate assembly shown;

[0032] Figure 5 yes Figure 4Schematic diagram of the planar structure of the direct cooling plate shown;

[0033] Figure 6 yes Figure 4 Schematic diagram of the exploded structure of the direct cooling plate shown;

[0034] Figure 7 yes Figure 3 A schematic diagram of the structure of the joint assembly in the direct cooling plate assembly shown;

[0035] Figure 8 yes Figure 7 The cross-sectional structure diagram of the joint assembly shown is after being cut along position II;

[0036] Fig. 9 yes Figure 7 The cross-sectional structure diagram of the joint assembly shown is after being cut along II-II;

[0037] Fig.10 yes Figure 7 An exploded structural diagram of the connector assembly shown;

[0038] Fig.11 yes Fig.10 The schematic diagram of the structure of the joint assembly shown is at another angle;

[0039] Fig.12 It is a schematic diagram of the flow path of the refrigerant in the direct cooling plate.

[0040] The names corresponding to the reference numerals in the figures are: battery pack 2000, battery cell 3000, direct cooling plate assembly 1000, direct cooling plate 100, joint assembly 200, first flow channel 110, second flow channel 120, third flow channel 130, third inlet 140, fourth inlet 150, fourth outlet 160, flow channel plate 170, cover plate 180, first surface 171, second surface 172, first groove 173, second groove 174, third groove 175, outer surface 201, third surface 202, Fourth surface 203, fifth surface 204, sixth surface 205, inlet channel 210, first outlet channel 220, connecting channel 230, second outlet channel 240, third outlet channel 250, first inlet 211, gas separation interface 212, first outlet 221, first sub-connecting channel 231, second sub-connecting channel 232, second outlet 241, second inlet 251, third outlet 252, first joint 260, second joint 270, positioning hole 261, positioning column 271. DETAILED DESCRIPTION

[0041] The technical solutions 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.

[0042] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of the battery pack 2000 provided in this application.

[0043] The present application provides a battery pack 2000, which includes a battery cell 3000 and a direct cooling plate assembly 1000, wherein the battery cell 3000 is located on one side of the thickness direction of the direct cooling plate assembly 1000 and is in contact with the direct cooling plate assembly 1000. The direct cooling plate assembly 1000 can dissipate heat for the battery cell 3000. It should be noted that there may be multiple battery cells 3000 and direct cooling plate assemblies 1000, and along the thickness direction of the direct cooling plate assembly 1000, multiple battery cells 3000 and multiple direct cooling plate assemblies 1000 are staggered and stacked, and each direct cooling plate assembly 1000 can dissipate heat for two adjacent battery cells 3000.

[0044] See also Figure 2 and Figure 3 , Figure 2 yes Figure 1 The schematic diagram of the structure of the direct cooling plate assembly 1000 in the battery pack 2000 is shown. Figure 3 yes Figure 2 A schematic diagram of the exploded structure of the direct cooling plate assembly 1000 is shown.

[0045] Next, for ease of description, the width direction of the direct cooling plate assembly 1000 is defined as the X-axis direction, the length direction of the direct cooling plate assembly 1000 is defined as the Y-axis direction, and the height direction of the direct cooling plate assembly 1000 is defined as the Z-axis direction, wherein the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0046] The present application provides a direct cooling plate assembly 1000, including a direct cooling plate 100 and a joint assembly 200, wherein the direct cooling plate 100 can be in contact with a battery cell 3000, and the joint assembly 200 is installed on the direct cooling plate 100. The refrigerant can enter the interior of the direct cooling plate 100 from the joint assembly 200, and after exchanging heat with the battery cell inside the direct cooling plate 100, the refrigerant is discharged from the joint assembly 200, thereby achieving heat dissipation of the battery cell 3000.

[0047] See also Figure 4 and Figure 5 , Figure 4 yes Figure 3 The schematic structural diagram of the direct cooling plate 100 in the direct cooling plate assembly 1000 is shown. Figure 5 yes Figure 4 A schematic plan view of the structure of the direct cooling plate 100 is shown.

[0048] The direct cooling plate 100 is provided with a first flow channel 110, a second flow channel 120, a third flow channel 130, a third inlet 140, a fourth inlet 150 and a fourth outlet 160. The first flow channel 110, the second flow channel 120 and the third flow channel 130 are all located inside the direct cooling plate 100. The first flow channel 110 is arranged around the second flow channel 120 and is arranged at a distance from the second flow channel 120. Among them, the first flow channel 110 can provide liquid refrigerant to flow, and the second flow channel 120 can provide gaseous refrigerant to flow. The third flow channel 130 connects the first flow channel 110 and the second flow channel 120. Among them, the third flow channel 130 can converge the liquid refrigerant flowing in the first flow channel 110 and the gaseous refrigerant flowing in the second flow channel 120. The third inlet 140 is connected to the first flow channel 110. The liquid refrigerant can enter the first flow channel 110 from the third inlet 140. The fourth inlet 150 is communicated with the second flow channel 120 and is spaced apart from the third inlet 140. The gaseous refrigerant can enter the second flow channel 120 from the fourth inlet 150. The fourth outlet 160 is communicated with the third flow channel 130.

[0049] In this embodiment, along the extension direction of the first flow channel 110, one end of the first flow channel 110 is connected to the third inlet 140, and the other end of the first flow channel 110 is connected to the third flow channel 130. Under this setting, in the extension direction of the first flow channel 110, the liquid refrigerant flows from one end of the first flow channel 110 to the other end, and the entire first flow channel 110 is available for the flow of liquid refrigerant, which can ensure that the flow path of the liquid refrigerant is the longest, and the heat of the liquid refrigerant can be fully utilized to dissipate heat from the battery cell 3000, which helps to improve the heat dissipation efficiency of the direct cooling plate assembly 1000 to the battery cell 3000. In some other embodiments, the first flow channel 110 can also be connected to the third inlet 140 and the third flow channel 130 at other positions, and this application does not impose specific restrictions on this.

[0050] Along the extension direction of the second flow channel 120, one end of the second flow channel 120 is connected to the fourth inlet 150, and the other end of the second flow channel 120 is connected to the third flow channel 130. Under this setting, in the extension direction of the second flow channel 120, the gaseous refrigerant flows from one end of the second flow channel 120 to the other end, and the entire second flow channel 120 is available for the flow of the gaseous refrigerant, which can ensure that the flow path of the gaseous refrigerant is the longest, and the heat of the gaseous refrigerant can be fully utilized to dissipate heat from the battery cell, which helps to improve the heat dissipation efficiency of the direct cooling plate assembly 1000 to the battery cell 3000. In some other embodiments, the second flow channel 120 can also be connected to the fourth inlet 150 and the third flow channel 130 at other positions, and this application does not impose specific restrictions on this.

[0051] Along the extension direction of the third flow channel 130, one end of the third flow channel 130 is connected to the first flow channel 110 and the second flow channel 120, and the other end of the third flow channel 130 is connected to the fourth outlet 160. Under this setting, in the extension direction of the third flow channel 130, the refrigerant can flow from one end of the third flow channel 130 to the other end, and the entire third flow channel 130 can be used for the flow of refrigerant, which can ensure that the flow path of the refrigerant is the longest, and the refrigerant can be fully utilized to absorb the heat of the battery cell to achieve the purpose of dissipating the heat of the battery cell, which helps to improve the heat dissipation efficiency of the direct cooling plate assembly 1000 to the battery cell 3000. In some other embodiments, the third flow channel 130 can also be connected to the first flow channel 110, the second flow channel 120 and the fourth outlet 160 at other positions, and this application does not impose specific restrictions on this.

[0052] Please also read Figure 6 , Figure 6 yes Figure 4 A schematic diagram of the exploded structure of the direct cooling plate 100 is shown.

[0053] The direct cooling plate 100 includes a flow channel plate 170 and a cover plate 180, and the cover plate 180 is installed on the flow channel plate 170. The flow channel plate 170 includes a first surface 171 and a second surface 172. The first surface 171 is the surface of the flow channel plate 170 facing the cover plate 180. Along the thickness direction of the flow channel plate 170 (Z-axis direction in the figure), the second surface 172 is arranged opposite to the first surface 171. The flow channel plate 170 is provided with a first groove 173, a second groove 174 and a third groove 175, and the openings of the first groove 173, the second groove 174 and the third groove 175 are all located on the first surface 171, and the first groove 173, the second groove 174 and the third groove 175 are all recessed from the first surface 171 to the direction of the second surface 172. Specifically, the first groove 173 is arranged around the second groove 174, and is spaced apart from the second groove 174. The third groove 175 connects the first groove 173 and the second groove 174. The flow channel plate 170 may be made of metal materials such as copper. For example, the first groove 173, the second groove 174 and the third groove 175 may be formed by a stamping process.

[0054] The cover plate 180 is mounted on the first surface 171, and is enclosed with the flow channel plate 170 to form the first flow channel 110, the second flow channel 120, and the third flow channel 130. Exemplarily, the cover plate 180 can be mounted on the first surface 171 by welding methods such as brazing. In some other embodiments, the cover plate 180 can also be mounted on the first surface 171 by other methods, and the present application does not impose specific restrictions on this. Specifically, the cover plate 180 is provided with a third inlet 140, a fourth inlet 150 and a fourth outlet 160, and the third inlet 140, the fourth inlet 150 and the fourth outlet 160 are all located at the edge of the cover plate 180, and all pass through the cover plate 180 along the thickness direction of the cover plate 180 (Z-axis direction shown in the figure). Among them, the third inlet 140 is connected to the first groove 173, the fourth inlet 150 is connected to the second groove 174, and the fourth outlet 160 is connected to the third groove 175. In this embodiment, the cover plate 180 and the first groove 173 enclose the first flow channel 110 , the cover plate 180 and the second flow channel 120 enclose the second flow channel 120 , and the cover plate 180 and the third groove 175 enclose the third flow channel 130 .

[0055] It should be noted that the flow channel plate 170 and the cover plate 180 are used to jointly enclose the first flow channel 110, the second flow channel 120 and the third flow channel 130, which not only facilitates the molding of the first flow channel 110, the second flow channel 120 and the third flow channel 130 and improves the molding accuracy of the first flow channel 110, the second flow channel 120 and the third flow channel 130, but also facilitates the maintenance and disassembly of the direct cooling plate 100.

[0056] See also Figure 7 and Figure 8 , Figure 7 yes Figure 3 The schematic diagram of the structure of the joint assembly 200 in the direct cooling plate assembly 1000 is shown. Figure 8 yes Figure 7 The cross-sectional structure diagram of the joint assembly 200 is shown after being cut along II. Wherein, when cut along II, it means cutting along the plane where II is located, and similar descriptions in the following text can be understood in the same way.

[0057] The joint assembly 200 is mounted on the surface of the cover plate 180 away from the flow channel plate 170, and covers the third inlet 140, the fourth inlet 150 and the fourth outlet 160. Exemplarily, the joint assembly 200 can be mounted on the surface of the cover plate 180 away from the flow channel plate 170 by welding such as brazing. The outer surface 201 of the joint assembly 200 includes a third surface 202, a fourth surface 203, a fifth surface 204 and a sixth surface 205. The third surface 202 is the surface of the joint assembly 200 facing the cover plate 180. Along the height direction of the joint assembly 200 (Z-axis direction shown in the figure), the fourth surface 203 is arranged opposite to the third surface 202. The fifth surface 204 and the sixth surface 205 are both connected between the third surface 202 and the fourth surface 203. The fifth surface 204 protrudes relative to the peripheral surface of the direct cooling plate 100. Along the length direction of the joint assembly 200 (Y-axis direction shown in the figure), the sixth surface 205 is arranged opposite to the fifth surface 204.

[0058] The joint assembly 200 is provided with an inlet channel 210, a first outlet channel 220, a connecting channel 230, a second outlet channel 240 and a third outlet channel 250, and the inlet channel 210, the first outlet channel 220, the connecting channel 230, the second outlet channel 240 and the third outlet channel 250 are all located inside the joint assembly 200. The inlet channel 210 is located at one end of the joint assembly 200 facing the fifth surface 204. Among them, the external refrigerant can enter the interior of the joint assembly 200 from the inlet channel 210. The inlet channel 210 has a first inlet 211 and a gas separation interface 212. The first inlet 211 is provided on the outer surface 201 of the joint assembly 200. Exemplarily, the first inlet 211 is located on the fifth surface 204. Among them, the external refrigerant can enter the inlet channel 210 from the first inlet 211. The gas separation interface 212 is arranged opposite to the first inlet 211. Exemplarily, the inlet channel 210 extends from the fifth surface 204 to the direction of the sixth surface 205 (i.e., the positive direction of the Y axis in the figure).

[0059] The first outlet channel 220 and the connecting channel 230 are both located on the side of the gas separation interface 212 away from the first inlet 211, and are both connected to the gas separation interface 212. The first outlet channel 220 is located on the bottom side of the gas separation interface 212. That is, the first outlet channel 220 is located on the side of the gas separation interface 212 facing the direct cooling plate 100. Among them, the first outlet channel 220 can provide liquid refrigerant for flow. The first outlet channel 220 has a first outlet 221 away from the gas separation interface 212, and the first outlet 221 is arranged on the outer surface 201 of the joint assembly 200, and is spaced apart from the first inlet 211. Among them, the first outlet 221 is connected to the third inlet 140. Exemplarily, the first outlet channel 220 extends from the third surface 202 toward the direction of the fourth surface 203 (i.e., the negative direction of the Z axis shown in the figure), and the first outlet 221 is arranged on the fourth surface 203.

[0060] The connecting channel 230 is located on the top side of the gas separation interface 212. That is, the connecting channel 230 is located on the side of the gas separation interface 212 away from the direct cooling plate 100. Among them, the connecting channel 230 can provide gaseous refrigerant flow. Exemplarily, the connecting channel 230 includes a first sub-connecting channel 231 and a second sub-connecting channel 232, the first sub-connecting channel 231 is connected to the gas separation interface 212, and the second sub-connecting channel 232 is connected to the first sub-connecting channel 231. The second outlet channel 240 is connected to the connecting channel 230. Exemplarily, the second outlet channel 240 is connected to the second sub-connecting channel 232 of the connecting channel 230. Among them, the gaseous refrigerant in the connecting channel 230 can flow to the direct cooling plate 100 through the second outlet channel 240.

[0061] The second outlet channel 240 has a second outlet 241 away from the connecting channel 230. The second outlet 241 is provided on the outer surface 201 of the joint assembly 200, and is spaced apart from the first inlet 211 and the first outlet 221, and is connected to the fourth inlet 150. Exemplarily, the second outlet channel 240 extends from the third surface 202 toward the fourth surface 203 (i.e., the negative direction of the Z axis in the figure), and the second outlet 241 is provided on the fourth surface 203. The extension direction of the second outlet channel 240 is inclined relative to the Z axis direction.

[0062] See also Figure 5 and Figure 8 After the external refrigerant enters the inlet channel 210 from the first inlet 211, gas-liquid separation occurs at the gas separation interface 212, that is, the external refrigerant is separated into liquid refrigerant and gaseous refrigerant at the gas separation interface 212. The liquid refrigerant will flow to the first outlet channel 220 located at the bottom side of the gas separation interface 212 under the action of gravity, and will flow into the first flow channel 110 of the direct cooling plate 100 from the first outlet 221 and the third inlet 140 in turn, thereby introducing the liquid refrigerant into the direct cooling plate 100. Most of the gaseous refrigerant will flow to the connecting channel 230 located on the top side of the gas separation interface 212 under the action of gravity, and will flow into the second flow channel 120 of the direct cooling plate 100 from the second outlet channel 240, the second outlet 241 and the fourth inlet 150 in turn, thereby introducing the gaseous refrigerant into the direct cooling plate 100. Among them, Figure 7 In the joint assembly 200 shown, the solid line with arrows represents the flow path of the liquid refrigerant, and the dotted line with arrows represents the flow path of the gaseous refrigerant.

[0063] See also Figure 7 and Fig. 9 , Fig. 9 yes Figure 7 The cross-sectional structure diagram of the joint assembly 200 is shown after being cut along II-II.

[0064] The third outlet channel 250 is located on one side of the inlet channel 210, and is spaced apart from the inlet channel 210, the first outlet channel 220, the connecting channel 230, and the second outlet channel 240. Specifically, along the width direction of the joint assembly 200 (the X-axis direction shown in the figure), the third outlet channel 250 is located on one side of the inlet channel 210. The third outlet channel 250 has a second inlet 251 and a third outlet 252. The second inlet 251 is provided on the outer surface 201 of the joint assembly 200, and is spaced apart from the first outlet 221 and the second outlet 241, and is connected to the fourth outlet 160. Exemplarily, the second inlet 251 is provided on the third surface 202. The third outlet 252 is disposed opposite to the second inlet 251, and is provided on the outer surface 201 of the joint assembly 200, and is spaced apart from the first inlet 211.

[0065] See also Figure 5 and Fig. 9 The refrigerant flowing in the third flow channel 130 can enter the third outlet channel 250 from the fourth outlet 160 and the second inlet 251 in sequence, and then be discharged through the third outlet 252, thereby discharging the refrigerant inside the direct cooling plate. Fig. 9 In the joint assembly 200 shown, the solid line with arrows represents the flow path of the refrigerant.

[0066] In this embodiment, the joint assembly 200 can both introduce the external refrigerant into the direct cooling plate and discharge the refrigerant inside the direct cooling plate. The joint assembly 200 integrates the two functions of introduction and export, which is convenient for the maintenance and disassembly of the direct cooling plate assembly 1000. In some other embodiments, the joint assembly 200 may not be provided with the third outlet channel 250. In this case, the joint assembly 200 can only introduce the external refrigerant into the direct cooling plate, and another joint can be used to export the refrigerant inside the direct cooling plate.

[0067] See also Fig.10 and Fig.11 , Fig.10 yes Figure 7 The exploded structural diagram of the connector assembly 200 is shown in FIG. Fig.11 yes Fig.10 The structure of the joint assembly 200 is shown in another perspective.

[0068] The joint assembly 200 includes a first joint 260 and a second joint 270, and the second joint 270 is installed on one side of the first joint 260. Exemplarily, along the length direction of the first joint 260 (the Y-axis direction shown in the figure), the second joint 270 is installed on one side of the first joint 260. Specifically, the first joint 260 is provided with a positioning hole 261, and the opening of the positioning hole 261 is located on the surface of the first joint 260 facing the second joint 270. Among them, there are two positioning holes 261, and the two positioning holes 261 are spaced from each other. Exemplarily, the surface of the first joint 260 facing the second joint 270 is a square surface, and the two positioning holes 261 are respectively located at two diagonal positions of the surface of the first joint 260 facing the second joint 270. The second joint 270 is provided with a positioning column 271, and the positioning column 271 is provided on the surface of the second joint 270 facing the first joint 260, and is inserted into the positioning hole 261. Among them, there are two positioning columns 271, and the two positioning columns 271 are respectively inserted into the two positioning holes 261.

[0069] In some other embodiments, the first joint 260 may also be provided with a positioning column, which is arranged on the surface of the first joint 260 facing the second joint 270. The second joint 270 may also be provided with a positioning hole, and the opening of the positioning hole is located on the surface of the second joint 270 facing the first joint 260. The present application does not make any specific restrictions on this.

[0070] In addition, the positioning post 271 is loosely matched with the positioning hole 261. The joint assembly 200 further includes a welding layer (not shown), which is connected between the first joint 260 and the second joint 270. In other words, during the assembly process of the joint assembly 200, the first joint 260 and the second joint 270 can be positioned through the positioning hole 261 and the positioning post 271, and then assembled by welding to ensure the assembly accuracy of the first joint 260 and the second joint 270.

[0071] In this embodiment, the inlet channel 210, the first outlet channel 220, the first sub-connecting channel 231 and the third outlet channel 250 are arranged at the first joint 260, and the second sub-connecting channel 232 and the second outlet channel 240 are arranged at the second joint 270. In some other embodiments, at least part of the inlet channel 210 may be arranged at the first joint 260 or the second joint 270, or at least part of the first outlet channel 220 may be arranged at the first joint 260 or the second joint 270, or at least part of the connecting channel 230 may be arranged at the first joint 260 or the second joint 270, or at least part of the second outlet channel 240 may be arranged at the first joint 260 or the second joint 270, or at least part of the third outlet channel 250 may be arranged at the first joint 260 or the second joint 270. Please refer to Figure 7 and Figure 8, exemplarily, the inlet channel 210 and the first outlet channel 220 are both arranged at the first joint 260 , the partial connecting channel 230 is arranged at the first joint 260 , the partial connecting channel 230 is arranged at the second joint 270 , the second outlet channel 240 is arranged at the second joint 270 , and the third outlet channel 250 is arranged at the first joint 260 .

[0072] It can be understood that the joint assembly 200, which is assembled in the form of the first joint 260 and the second joint 270, can not only facilitate the molding of the inlet channel 210, the first outlet channel 220, the connecting channel 230, the second outlet channel 240 and the third outlet channel 250, improve the molding accuracy of the inlet channel 210, the first outlet channel 220, the connecting channel 230, the second outlet channel 240 and the third outlet channel 250, but also facilitate the maintenance and disassembly of the joint assembly 200.

[0073] See also Fig.12 , Fig.12 Schematic diagram of the flow path of the refrigerant in the direct cooling plate 100. The solid line with arrows represents the flow path of the liquid refrigerant in the direct cooling plate 100, and the dotted line with arrows represents the flow path of the gaseous refrigerant in the direct cooling plate 100.

[0074] The liquid refrigerant flows into the first channel 110 from the third inlet 140, and flows from the first channel 110 to the third channel 130. The gaseous refrigerant flows into the second channel 120 from the fourth inlet 150, and flows from the second channel 120 to the third channel 130. The liquid refrigerant and the gaseous refrigerant converge in the third channel 130, and flow from the fourth outlet 160 to the joint assembly 200, and then are discharged through the joint assembly 200, thereby realizing the heat dissipation of the battery cell 3000 by the direct cooling plate 100. Among them, the flow process of the liquid refrigerant in the first channel 110 and the flow process of the gaseous refrigerant in the second channel 120 can both realize heat exchange with the battery cell 3000, thereby realizing the heat dissipation of the battery cell 3000 by the direct cooling plate 100. It is understandable that, when the liquid refrigerant flows from the first flow channel 110 to the third flow channel 130 , the liquid refrigerant undergoes heat exchange with the battery cell 3000 and becomes gaseous. Therefore, most of the refrigerant in the third flow channel 130 is in gaseous state.

[0075] In the direct cooling plate assembly 1000 shown in the present application, the direct cooling plate 100 is designed with two refrigerant inlets, a third inlet 140 and a fourth inlet 150, and a refrigerant outlet, a fourth outlet 160. The joint assembly 200 can separate the external two-phase refrigerant into liquid refrigerant and gaseous refrigerant. The liquid refrigerant enters the first flow channel 110 from the third inlet 140, and the gaseous refrigerant enters the second flow channel 120 from the fourth inlet 150. At this time, most of the front end of the direct cooling plate 100 is liquid refrigerant. The liquid refrigerant cools most of the direct cooling plate 100, and the gaseous refrigerant cools the rest of the direct cooling plate 100. The gaseous refrigerant and the liquid refrigerant can converge in the third flow channel 130. The gaseous refrigerant can neutralize the problem of overheating of the refrigerant at the rear end of the direct cooling plate 100, effectively improve the temperature uniformity of the direct cooling plate 100, and avoid the problem of local battery cells being damaged due to high temperature.

[0076] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A joint assembly (200), characterized in that: The joint assembly (200) is provided with an inlet channel (210), a first outlet channel (220), a connecting channel (230) and a second outlet channel (240); The inlet channel (210) has a first inlet (211) and a gas separation interface (212), wherein the first inlet (211) is arranged on the outer surface (201) of the joint assembly (200), and the gas separation interface (212) is arranged opposite to the first inlet (211); The first outlet channel (220) and the connecting channel (230) are both in communication with the gas separation interface (212); the first outlet channel (220) is located at the bottom side of the gas separation interface (212); the connecting channel (230) is located at the top side of the gas separation interface (212); and the second outlet channel (240) is in communication with the connecting channel (230) and is spaced apart from the first outlet channel (220).

2. The joint assembly (200) according to claim 1, characterized in that: The joint assembly (200) is further provided with a third outlet channel (250), and the third outlet channel (250) is spaced apart from the inlet channel (210), the first outlet channel (220), the connecting channel (230) and the second outlet channel (240).

3. The joint assembly (200) according to claim 1 or 2, characterized in that: The joint assembly (200) comprises a first joint (260) and a second joint (270), wherein the second joint (270) is installed on one side of the first joint (260); The connecting channel (230) comprises a first sub-connecting channel (231) and a second sub-connecting channel (232), wherein the first sub-connecting channel (231) is in communication with the gas separation interface (212), and the second sub-connecting channel (232) is in communication with the first sub-connecting channel (231) and the second outlet channel (240); The inlet channel (210), the first outlet channel (220) and the first sub-connecting channel (231) are all arranged at the first joint (260), and the second sub-connecting channel (232) and the second outlet channel (240) are all arranged at the second joint (270).

4. The joint assembly (200) according to claim 3, characterized in that: The first joint (260) is provided with a positioning hole (261), the opening of the positioning hole (261) is located on the surface of the first joint (260) facing the second joint (270), the second joint (270) is provided with a positioning column (271), the positioning column (271) is provided on the surface of the second joint (270) facing the first joint (260), and the positioning column (271) is inserted into the positioning hole (261); Alternatively, the first joint (260) is provided with a positioning column (271), and the positioning column (271) is provided on the surface of the first joint (260) facing the second joint (270), and the second joint (270) is provided with a positioning hole (261), and the opening of the positioning hole (261) is provided on the surface of the second joint (270) facing the first joint (260), and the positioning column (271) is inserted into the positioning hole (261).

5. The joint assembly (200) according to claim 4, characterized in that: The positioning column (271) is loosely matched with the positioning hole (261), and the first joint (260) and the second joint (270) are fixedly connected.

6. The joint assembly (200) according to claim 1, characterized in that: The first outlet channel (220) has a first outlet (221) facing away from the gas separation interface (212), and the first outlet (221) is arranged on the outer surface of the joint assembly (200); The second outlet channel (240) has a second outlet (241) facing away from the connecting channel (230); the second outlet (241) is arranged on the outer surface of the joint assembly (200) and is spaced apart from the first outlet (221).

7. A direct cooling plate assembly (1000), characterized in that: It comprises a direct cooling plate (100) and a joint assembly (200) as claimed in any one of claims 1 to 6; The direct cooling plate (100) is provided with a first flow channel (110), a second flow channel (120), a third inlet (140) and a fourth inlet (150); the first flow channel (110) and the second flow channel (120) are both located inside the direct cooling plate (100) and are spaced apart from each other; the third inlet (140) is communicated with the first flow channel (110); the fourth inlet (150) is spaced apart from the third inlet (140) and is communicated with the second flow channel (120); The joint assembly (200) is installed on the direct cooling plate (100), the first outlet channel (220) is connected to the third inlet (140), and the second outlet channel (240) is connected to the fourth inlet (150).

8. The direct cooling plate assembly (1000) according to claim 7, characterized in that: The direct cooling plate (100) is further provided with a third flow channel (130) and a fourth outlet (160), wherein the third flow channel (130) is located inside the direct cooling plate (100) and is connected to the first flow channel (110) and the second flow channel (120), and the fourth outlet (160) is arranged at intervals from the third inlet (140) and the fourth inlet (150), and is connected to the third flow channel (130); The third outlet channel (250) of the joint assembly (200) is in communication with the fourth outlet (160).

9. The direct cooling plate assembly (1000) according to claim 8, characterized in that: Along the extension direction of the first flow channel (110), the third inlet (140) is connected to one end of the first flow channel (110), and the third flow channel (130) is connected to the other end of the first flow channel (110); And / or, along the extension direction of the second flow channel (120), the fourth inlet (150) is connected to one end of the second flow channel (120), and the third flow channel (130) is connected to the other end of the second flow channel (120).

10. The direct cooling plate assembly (1000) according to any one of claims 7 to 9, characterized in that: The direct cooling plate (100) includes a flow channel plate (170) and a cover plate (180), the cover plate (180) is provided with the third inlet (140) and the fourth inlet (150), the third inlet (140) and the fourth inlet (150) both penetrate the cover plate (180) along the thickness direction of the cover plate (180), the cover plate (180) is installed on the flow channel plate (170), and is enclosed with the flow channel plate (170) to form the first flow channel (110) and the second flow channel (120).

11. A battery pack (2000), characterized in that: It comprises a direct cooling plate assembly (1000) and a battery cell (3000) according to any one of claims 7 to 10, wherein the battery cell (3000) is in contact with the direct cooling plate (100).

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