Liquid cooling assembly and battery pack

Abstract

The utility model relates to a liquid cooling assembly and a battery pack. The liquid cooling assembly comprises a liquid cooling bottom plate and a harmonica-shaped tube group, the liquid cooling bottom plate is provided with a first liquid inlet, a shunting port, a first cooling flow channel, a converging port and a first liquid outlet, the shunting port is communicated with the first cooling flow channel, and the converging port is communicated with the first cooling flow channel; the harmonica-shaped tube group is arranged on the liquid cooling bottom plate and is provided with a shunting channel, a converging channel and at least two harmonica-shaped tubes, and the harmonica-shaped tubes are used for being placed into the side surfaces of the battery cells and are in thermal contact with the battery cells; the harmonica-shaped tube is provided with a second liquid inlet, a second cooling flow channel and a second liquid outlet; one end of the flow dividing channel is communicated with the flow dividing opening, and the flow dividing channel is communicated with the second liquid inlet; one end of the confluence channel communicates with the second liquid outlet, the confluence channel communicates with the confluence opening, and the confluence opening is used for converging the cooling liquid in the second cooling flow channel and the cooling liquid in the first cooling flow channel to the first liquid outlet; and through the arrangement of the shunting channels, the temperatures of the cooling liquid in the harmonica-shaped tubes are similar, and the heat dissipation effect is good.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage products, and in particular to a liquid cooling assembly and a battery pack. Background Art

[0002] Chinese patent CN117393944A disclosed an energy storage device and electrical equipment on January 12, 2024, wherein the energy storage device comprises a plurality of battery modules and a liquid cooling assembly, wherein the liquid cooling assembly comprises a first and a second liquid cooling plate, and a first and a second adapter; the first liquid cooling plate has a first flow channel, a first jack, and a second jack; the first adapter is inserted into the first jack, and the first sub-flow channel is connected to the first flow channel; the second adapter is inserted into the second jack, and the second sub-flow channel is connected to the first flow channel; a second liquid cooling plate is provided between two adjacent battery modules, and the second liquid cooling plate comprises a cold plate body, a first and a second protrusion, and the cold plate body has a second flow channel inside, the first protrusion has an inlet connected to the second flow channel, and the second protrusion has an outlet connected to the second flow channel; the first protrusion is inserted into the first slot of the first adapter, and the inlet is connected to the first sub-flow channel of the first adapter; the second protrusion is inserted into the second slot of the second adapter, and the outlet is connected to the second sub-flow channel of the second adapter.

[0003] The first liquid cooling plate and the second liquid cooling plate are fixed by setting the first adapter and the second adapter, so that the second liquid cooling plate is stably set between two adjacent battery modules, and the first flow channel and the second flow channel are connected by the first adapter and the second adapter, so that the fluid flows between the first liquid cooling plate and the second liquid cooling plate.

[0004] However, the above patent has the following defects:

[0005] The second liquid cooling plate is connected to the first flow channel of the first liquid cooling plate. When cooling the battery cell, the coolant flows from the head to the tail of the first liquid cooling plate, and when it flows to the position corresponding to each second liquid cooling plate, part of the coolant flows from the first liquid cooling plate into the second liquid cooling plate to exchange heat with the side of the battery cell. In the above structure, part of the second liquid cooling plate needs to be arranged near the liquid outlet of the first liquid cooling plate, that is, the tail position of the first liquid cooling plate. In addition, as the coolant flows from the liquid inlet to the liquid outlet, the coolant continuously exchanges heat with the battery module in the first liquid cooling plate, so that the temperature of the coolant near the liquid outlet is higher, so the temperature of the coolant flowing into the second liquid cooling plate at the tail position is also higher, which makes the cooling effect of the part of the second liquid cooling plate at the tail on the battery module poor, and cannot play an effective cooling role. Utility Model Content

[0006] In order to solve the problems existing in the above-mentioned prior art, the present disclosure aims to provide a liquid cooling assembly and a battery pack to solve the problem that when multiple battery modules are arranged, some battery modules cannot be normally cooled by heat exchange through the second liquid cooling plate.

[0007] A liquid cooling assembly disclosed herein comprises a liquid cooling base plate and a harmonica pipe set;

[0008] The liquid cooling bottom plate comprises a first liquid inlet, a diverter, a first cooling channel, a confluence and a first liquid outlet, wherein the diverter is arranged at a location of the first cooling channel close to the first liquid inlet and is connected to the first cooling channel, and the confluence is arranged at a location of the first cooling channel close to the first liquid outlet and is connected to the first cooling channel;

[0009] The harmonica tube group is arranged on the liquid cooling base plate, and has a shunt channel, a confluence channel and at least two harmonica tubes, the harmonica tubes are used to be placed in the side of the battery cell and in thermal contact with the battery cell; the harmonica tubes have a second liquid inlet, a second cooling channel and a second liquid outlet; one end of the shunt channel is connected with the shunt port, and the shunt channel is connected with the second liquid inlet to allow the cooling liquid to pass through the shunt channel and flow from the shunt port to each of the second liquid inlets; one end of the confluence channel is connected with the second liquid outlet, and the confluence channel is connected with the confluence port to allow the cooling liquid in the second cooling channel to merge into the confluence port, and the confluence port is used to merge the cooling liquid in the second cooling channel with the cooling liquid in the first cooling channel to the first liquid outlet.

[0010] Preferably, the harmonica tube near the first liquid inlet is a head harmonica tube, the harmonica tube near the first liquid outlet is a tail harmonica tube, one end of the shunt channel is connected to the shunt outlet, and the other end is connected to the second liquid inlet of the head harmonica tube, one end of the second liquid outlet of the head harmonica tube is closed; the second liquid inlets of two adjacent harmonica tubes are connected;

[0011] One end of the confluence channel is connected to the confluence port, and the other end is connected to the second liquid outlet of the tail harmonica tube. One end of the second liquid inlet of the tail harmonica tube is closed; the second liquid outlets of two adjacent harmonica tubes are connected.

[0012] Preferably, the first cooling channel comprises a first liquid inlet main channel, a first liquid outlet main channel and n branch channels;

[0013] The first liquid inlet main path comprises a first liquid inlet end connected to the first liquid inlet port, a first liquid inlet main channel and a cooling liquid shunt channel, one end of the first liquid inlet main channel is connected to the first liquid inlet end, and the other end is connected to the cooling liquid shunt channel, the shunt port is arranged at a point on the first liquid inlet main channel close to the first liquid inlet end, and is connected to the first liquid inlet main channel; the cooling liquid shunt channel is perpendicular to each of the branches;

[0014] The first liquid outlet main channel comprises a coolant converging channel, a first liquid outlet main channel and a first liquid outlet end connected to the first liquid outlet port, one end of the first liquid outlet main channel is connected to the coolant converging channel, and the other end is connected to the first liquid outlet end, the converging port is arranged at a point on the first liquid outlet main channel close to the first liquid outlet end, and is connected to the first liquid outlet main channel; the first liquid outlet main channel is parallel to each of the branch channels;

[0015] One end of each of the n branches is connected to the coolant diversion channel to form a parallel diversion structure, and the other end of each of the n branches is connected to the first liquid outlet main channel to form a parallel confluence structure.

[0016] Preferably, the branch includes (n-1) first branches and 1 second branch; wherein n≥3; the second branch is formed near the main outlet channel;

[0017] The first branch includes a first liquid inlet branch channel, a first heat exchange channel structure and a first liquid outlet branch channel, and the first heat exchange channel structure includes at least two parallel and parallel heat exchange channels;

[0018] The second branch includes a second liquid inlet branch channel, a second heat exchange channel structure and a second liquid outlet branch channel, and the second heat exchange channel structure includes a single heat exchange channel.

[0019] Preferably, the first liquid inlet and the first liquid outlet are arranged at the same end in the length direction of the liquid cooling bottom plate, a channel is formed between the first liquid inlet end and the first liquid outlet end, and both ends of the channel are closed.

[0020] Preferably, the second cooling channel includes a second liquid inlet main path and a second liquid outlet main path, one end of the second liquid inlet main path is connected to the second liquid inlet, the other end is connected to one end of the second liquid outlet main path, and the other end of the second liquid outlet main path is connected to the second liquid outlet.

[0021] Preferably, the harmonica pipe is arranged perpendicular to the liquid-cooled bottom plate.

[0022] A battery pack disclosed in the present invention comprises the liquid cooling assembly, base frame, side panels, battery modules and cover body as described above, wherein the battery module is arranged on the liquid cooling base plate and comprises a plurality of rows of battery cells, the liquid cooling base plate is arranged on the base frame and connected to the base frame, the harmonica tube is arranged between two adjacent battery cells, the side panels are arranged on the outer side of the battery module along the length direction of the liquid cooling assembly, are parallel to the harmonica tube and are connected to the base frame; the cover body covers a plurality of groups of the battery modules and is connected to the base frame.

[0023] Preferably, the side panel further includes a reinforcement structure, which includes a plurality of reinforcement plates spaced apart along the length direction of the side panel, the bottom of the reinforcement plate is connected to the base frame, and one side of the reinforcement plate is connected to the side panel.

[0024] Preferably, the battery pack further comprises a fixing belt, and snap-in grooves are formed at the upper part and both ends of the length direction of the side plate along the length direction of the side plate, and the fixing belt is snap-fitted with the snap-in grooves to fix the battery module.

[0025] The advantages of a liquid cooling assembly and a battery pack disclosed in the present disclosure are:

[0026] Through the setting of the shunt channel, one end is connected with the shunt port, and the shunt channel is connected with the second liquid inlet, so that the coolant can flow into each harmonica tube more evenly through the shunt port and the shunt channel after entering from the first liquid inlet, and the coolant directly flows into each harmonica tube through the shunt channel, without passing through the first cooling channel and the battery core for heat exchange before entering the harmonica tube at the tail, so that the coolant flowing into the harmonica tube at the tail can maintain a lower temperature, so that the harmonica tube at this location can effectively cool the battery core. And through the setting of the shunt channel, the temperature of each harmonica tube is close, so that the cooling effect of the harmonica tube on the side of the battery core is uniform, so that the overall temperature of the battery module 5 is uniform, which is conducive to improving the stability and safety of the battery module operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a top view of the liquid cooling assembly of the present disclosure;

[0028] Figure 2 is a side view of the liquid cooling assembly;

[0029] Figure 3 is a schematic diagram of the flow channel of the liquid cooling base plate;

[0030] Figure 4 is a schematic diagram of the flow path of the harmonica tube;

[0031] Figure 5 is an exploded view of the battery pack.

[0032] Description of the accompanying drawings: 1-liquid cooling base plate;

[0033] 11-first liquid inlet, 12-dividing port, 13-first cooling channel, 14-merging port, 15-first liquid outlet;

[0034] 131-first liquid inlet main road, 132-first liquid outlet main road, 133-branch road;

[0035] 1311-first liquid inlet end, 1312-first liquid inlet main channel, 1313-cooling liquid diversion channel;

[0036] 1321-cooling liquid collecting channel, 1322-first liquid outlet main channel, 1323-first liquid outlet end;

[0037] 1331-first branch, 1332-second branch;

[0038] 1331a-first liquid inlet branch channel, 1331b-first heat exchange channel structure, 1331c-first liquid outlet branch channel, 1332a-second liquid inlet branch channel, 1332b-second heat exchange channel structure, 1332c-second liquid outlet branch channel;

[0039] 2- harmonica pipe set;

[0040] 21-diverter channel, 22-merger channel, 23-harmonica tube;

[0041] 231 - second liquid inlet, 232 - second cooling channel, 233 - second liquid outlet;

[0042] 2321- the second liquid inlet main path, 2322- the second liquid outlet main path;

[0043] 3- bottom frame;

[0044] 4-side plate, 41-reinforcement plate;

[0045] 5-battery module, 51-battery cell;

[0046] 6-cover;

[0047] 7-Fixation strap. DETAILED DESCRIPTION

[0048] In the description of the specific embodiment of the present disclosure, the battery module 5 includes at least one column of battery cells 51, and one column of battery cells 51 includes at least one battery cell;

[0049] like Figure 1 As shown, the present disclosure provides a liquid cooling assembly, including a liquid cooling base plate 1 and a harmonica pipe set 2;

[0050] The liquid cooling base plate 1 comprises a first liquid inlet 11, a diverter 12, a first cooling channel 13, a confluence 14 and a first liquid outlet 15. The diverter 12 is arranged at a location of the first cooling channel 13 close to the first liquid inlet 11 and is connected to the first cooling channel 13. The confluence 14 is arranged at a location of the first cooling channel 13 close to the first liquid outlet 15 and is connected to the first cooling channel 13.

[0051] The harmonica tube group 2 is arranged on the liquid-cooled base plate 1, and has a shunt channel 21, a confluence channel 22 and at least two harmonica tubes 23. The harmonica tube 23 is used to be placed in the side of the battery cell 51 and in thermal contact with the battery cell 51; the harmonica tube 23 has a second liquid inlet 231, a second cooling channel 232 and a second liquid outlet 233; one end of the shunt channel 21 is connected to the shunt port 12, and the shunt channel 21 is connected to the second liquid inlet 231 to allow the coolant to be shunted from the shunt port 12 to each second liquid inlet 231 through the shunt channel 21; one end of the confluence channel 22 is connected to the second liquid outlet 233, and the confluence channel 22 is connected to the confluence port 14 to allow the coolant in the second cooling channel 232 to merge into the confluence port 14, and the confluence port 14 is used to merge the coolant in the second cooling channel 232 with the coolant in the first cooling channel 13 to the first liquid outlet 15.

[0052] Specifically, the first liquid inlet 11, the diversion port 12, the confluence port 14 and the first liquid outlet 15 are formed on the top surface of the liquid cooling bottom plate 1 and are respectively connected to the first cooling channel 13;

[0053] In the harmonica pipe set 2, the diversion channel 21 and the confluence channel 22 can be formed by the harmonica pipe set 2 itself, or can be formed by communicating with each other through pipes.

[0054] The coolant enters the first cooling channel 13 from the first liquid inlet 11, and enters the shunt channel 21 through the shunt port 12. The shunt channel 21 is connected to the second liquid inlet 231, so that the coolant enters each second cooling channel 232 from the shunt channel 21; the coolant in the second cooling channel 232 exchanges heat with the battery cell 51 and flows out from the second liquid outlet 233, and merges to the merging port 14 through the merging channel 22. At the same time, the coolant in the first cooling channel 13 flows to the merging port 14, merges with the coolant in the second cooling channel 232, and finally flows out from the first liquid outlet 15.

[0055] By setting the shunt channel 21, the coolant flows through the first cooling channel 13 of the liquid-cooled bottom plate 1 on the one hand, and exchanges heat with the bottom of the battery module 5, and on the other hand, flows through the second cooling channel 232 of each harmonica tube 23, and exchanges heat with the side of each column of battery cells 51, thereby ensuring that the temperature of each column of battery cells 51 is within a suitable range. If multiple columns of battery cells 51 are provided, the number of harmonica tubes 23 will increase accordingly, so that the number of harmonica tubes 23 matches the number of battery cells 51. In this case, due to the setting of the bypass channel 21, the coolant can flow to the second cooling channel 232 of each harmonica tube 23 more evenly, and the temperature of the coolant in each second cooling channel 232 is similar. Even if some battery cells 51 are arranged near the first liquid outlet 15, the temperature of the coolant in the harmonica tube 23 in thermal contact with the side of the battery cell 51 is similar to the temperature of the coolant in other harmonica tubes 23, that is, the cooling effect of each battery cell 51 is guaranteed to be similar, thereby ensuring the heat dissipation effect of the battery module 5.

[0056] Through the setting of the shunt channel 21, one end is connected with the shunt port 12, and the shunt channel 21 is connected with the second liquid inlet 231, so that the coolant can flow into each harmonica tube 23 more evenly through the shunt port 12 and the shunt channel 21 after entering from the first liquid inlet 11, and the coolant flows directly into each harmonica tube 23 through the shunt channel 21, without passing through the first cooling channel 13 and exchanging heat with the battery cell 51 before entering the harmonica tube 23 located at the tail, so that the coolant flowing into the harmonica tube 23 located at the tail can maintain a lower temperature, so that the harmonica tube 23 at this location can effectively cool down the battery cell 51. And through the setting of the shunt channel 21, the temperature of each harmonica tube 23 is close, so that the cooling effect of the harmonica tube 23 on the side of the battery cell 51 is uniform, so that the overall temperature of the battery module 5 is uniform, which is conducive to improving the stability and safety of the battery module 5.

[0057] Furthermore, there are multiple embodiments for the connection relationship between the shunt channel 21 and the second liquid inlet 231. For example, the shunt channel 21 can be connected to each second liquid inlet 231 respectively, and the coolant is evenly diverted to each second liquid inlet 231 through the shunt channel 21, so that the coolant evenly enters the second cooling channel 232.

[0058] Alternatively, after two adjacent second liquid inlets 231 are connected, one of the second liquid inlets 231, for example, a plurality of second liquid inlets 231, may be connected, one end of the second liquid inlet 231 located at one end may be connected to the diversion channel 21, and the other end may be connected to the adjacent second liquid inlet 231, and one end of the second liquid inlet 231 located at the other end may be connected to the adjacent second liquid inlet 231, and the other end may be sealed to prevent leakage of the coolant;

[0059] Similarly, the communication relationship between the merging channel 22 and the second liquid outlet 233 can also refer to the above-mentioned communication manner.

[0060] It should be noted that only the implementation method of the communication relationship between the diverter channel 21 and the second liquid inlet 231 and the implementation method of the communication relationship between the confluence channel 22 and the second liquid outlet 233 are explained here, and the communication method between the diverter channel 21 and the diverter port 12, the communication method between the confluence channel 22 and the confluence port 14, the relative position relationship between the diverter channel 21 and the diverter port 12, and the relative position relationship between the confluence channel 22 and the confluence port 14 are not limited here;

[0061] For the convenience of description, the harmonica tube 23 near the first liquid inlet 11 is called the head harmonica tube, and the harmonica tube 23 near the first liquid outlet 15 is called the tail harmonica tube. As a preferred embodiment, one end of the shunt channel 21 is connected to the shunt port 12, and the other end is connected to the second liquid inlet 231 of the head harmonica tube, and one end of the second liquid outlet 233 of the head harmonica tube is closed; the second liquid inlets 231 of two adjacent harmonica tubes 23 are connected; the communication mode of the two adjacent second liquid inlets 231 can be connected by a hose, or by welding matching joints at both ends of the second liquid inlet 231, and the two adjacent second liquid inlets 231 are connected by matching joints, wherein since the second liquid inlet 231 of the tail harmonica tube only needs to be connected with one adjacent second liquid inlet 231, one end of the second liquid inlet 231 of the tail harmonica tube is closed to avoid leakage of coolant;

[0062] Similarly, one end of the confluence channel 22 is connected to the confluence port 14, and the other end is connected to the second liquid outlet 233 of the tail harmonica tube, and one end of the second liquid inlet 231 of the tail harmonica tube is closed; the second liquid outlets 233 of two adjacent harmonica tubes 23 are connected; the connection method of two adjacent second liquid outlets 233 can be connected through a hose, or it can be by welding matching joints at both ends of the second liquid outlet 233, and the two adjacent second liquid outlets 233 are connected by matching joints, wherein since the second liquid outlet 233 of the head harmonica tube only needs to be connected with one adjacent second liquid outlet 233, one end of the second liquid outlet 233 of the head harmonica tube is closed to avoid leakage of cooling liquid.

[0063] Specifically, see Figure 2 , Figure 2It is a side view of one embodiment of the liquid cooling component. In this embodiment, the first liquid inlet 11 and the second liquid inlet 231 are located on the same side of the liquid cooling base plate 1, the distributing port 12 and the first liquid inlet 11 are arranged at the same position from the side view, and the converging port 14 and the first liquid outlet 15 are arranged at the same position from the side view; the second liquid inlet 231 and the second liquid outlet 233 of the harmonica tube 23 are arranged on one side of the harmonica tube 23 close to the first liquid inlet 11, and the second liquid inlet 231 is arranged above the second liquid outlet 233;

[0064] One end of the shunt channel 21 is connected to the shunt port 12, and the other end is connected to the second liquid inlet 231 of the head harmonica tube, while the other end of the second liquid inlet 231 of the head harmonica tube is connected to the adjacent second liquid inlet 231, and one end of the second liquid outlet 233 of the head harmonica tube is connected to the adjacent second liquid outlet 233, and the other end is closed to prevent leakage of the coolant;

[0065] One end of the confluence channel 22 is connected to the confluence port 14, and the other end is connected to the second liquid outlet 233 of the tail harmonica tube. At the same time, the other end of the second liquid outlet 233 of the tail harmonica tube is connected to the adjacent second liquid outlet 233, one end of the second liquid inlet 231 of the tail harmonica tube is connected to the second liquid inlet 231 of the adjacent harmonica tube 23, and the other end is closed to prevent leakage of cooling liquid.

[0066] It should be noted that the above embodiment is only one embodiment of the cooling component described in the present disclosure. The settings of the first liquid inlet 11, the first liquid outlet 15, the diverter port 12, and the confluence port 14 on the liquid cooling base plate 1 can be set according to actual conditions. It is only necessary to ensure that the diverter port 12 is set close to the first liquid inlet 11 and the confluence port 14 is set close to the first liquid outlet 15. The settings of the second liquid inlet 231 and the second liquid outlet 233 on the harmonica tube 23 can also be set according to actual conditions. For example, the second liquid inlet 231 can be set on the side of the harmonica tube 23 close to the first liquid inlet 11, and the second liquid outlet 233 can be set on the side of the harmonica tube 23 close to the first liquid outlet 15, and so on.

[0067] Further, such as Figure 3 As shown, the first cooling channel 13 includes a first liquid inlet main path 131, a first liquid outlet main path 132 and n branch paths 133;

[0068] The first liquid inlet main path 131 includes a first liquid inlet end 1311 connected to the first liquid inlet port 11, a first liquid inlet main channel 1312 and a cooling liquid diversion channel 1313. One end of the first liquid inlet main channel 1312 is connected to the first liquid inlet end 1311, and the other end is connected to the cooling liquid diversion channel 1313. The diversion port 12 is arranged on the first liquid inlet main channel 1312 at a location close to the first liquid inlet end 1311. The cooling liquid diversion channel 1313 is perpendicular to each branch 133.

[0069] The first liquid outlet main channel 132 includes a cooling liquid converging channel 1321, a first liquid outlet main channel 1322, and a first liquid outlet end 1323 connected to the first liquid outlet port 15. One end of the first liquid outlet main channel 1322 is connected to the cooling liquid converging channel 1321, and the other end is connected to the first liquid outlet end 1323. The converging port 14 is disposed on the first liquid outlet main channel 1322 at a location close to the first liquid outlet end 1323. The first liquid outlet main channel 1322 is parallel to each branch channel 133.

[0070] One end of each of the n branches 133 is connected to the coolant diversion channel 1313 to form a parallel diversion structure, and the other end of each of the n branches 133 is connected to the first liquid outlet main channel 132 to form a parallel confluence structure.

[0071] By connecting the branch 133 with the cooling liquid shunt channel 1313 to form a parallel shunt structure and connecting the branch 133 with the first liquid outlet main channel 132 to form a parallel confluence structure, the temperature of the battery modules 5 in each area is ensured to be balanced.

[0072] Furthermore, in order to further improve the utilization rate of the coolant, the branch 133 includes (n-1) first branches 1331 and one second branch 1332; wherein n≥3; the second branch 1332 is formed near the main outlet channel;

[0073] The first branch 1331 includes a first liquid inlet branch channel 1331a, a first heat exchange channel structure 1331b and a first liquid outlet branch channel 1331c, and the first heat exchange channel structure 1331b includes at least two parallel heat exchange channels;

[0074] The second branch 1332 includes a second liquid inlet branch channel 1332a, a second heat exchange channel structure 1332b and a second liquid outlet branch channel 1332c. The second heat exchange channel structure 1332b includes a single heat exchange channel.

[0075] The first heat exchange flow channel structure 1331b is set to further divert the coolant in the first branch 1331, increase the contact area with the battery module 5 in the area, and thus improve the utilization rate of the coolant, while ensuring the heat exchange efficiency. In addition, since the first heat exchange flow channel structure 1331b adopts at least two parallel and parallel heat exchange flow channels, the flow resistance of the coolant inside the first branch 1331 is small, while ensuring the cooling efficiency, the flow resistance is reduced, and the pressure in the flow channel of the first branch 1331 is reduced;

[0076] The second branch 1332 is formed near the liquid outlet, and the coolant flowing there has a relatively low pressure. Therefore, the second heat exchange channel structure 1332b is designed to include a single heat exchange channel, which can appropriately reduce the processing difficulty.

[0077] Furthermore, the first liquid inlet 11 and the first liquid outlet 15 are arranged at the same end in the length direction of the liquid-cooled base plate 1, and a groove is formed between the first liquid inlet end 1311 and the first liquid outlet end 1323, and both ends of the groove are closed, that is, the groove is not connected to the first liquid inlet main path 131, the first liquid outlet main path 132 and the branch path 133, and the coolant does not flow through the groove; the setting of the groove is similar to forming a symmetrical structure with the coolant converging channel 1321, thereby ensuring that the supporting strength of each area of ​​the liquid-cooled base plate 1 is similar.

[0078] Further, such as Figure 4 As shown, both ends of the harmonica tube 23 are sealed, and the second cooling channel 232 includes a second liquid inlet main path 2321 and a second liquid outlet main path 2322, one end of the second liquid inlet main path 2321 is connected to the second liquid inlet port 231, and the other end is connected to one end of the second liquid outlet main path 2322, and the other end of the second liquid outlet main path 2322 is connected to the second liquid outlet port 233.

[0079] Specifically, in this embodiment, the second cooling channel 232 is "U"-shaped, the second liquid inlet 231 and the second liquid outlet 233 are arranged on the same side of the harmonica tube 23, the second liquid inlet main path 2321 includes two parallel and parallel second liquid inlet channels, the second liquid outlet main path 2322 includes two parallel and parallel second liquid outlet channels, and one end of the second liquid inlet channel away from the second liquid inlet 231 is connected to the end of the second liquid outlet channel away from the second liquid outlet 233 to avoid the coolant flowing directly from the second liquid inlet 231 to the second liquid outlet 233, which may cause the battery module 5 to fail to undergo normal heat exchange and cooling through the harmonica tube 23.

[0080] Furthermore, in order to ensure the contact area between the harmonica tube 23 and the battery module 5 and thus ensure the heat exchange efficiency, the harmonica tube 23 is arranged perpendicular to the liquid cooling bottom plate 1 .

[0081] Further, such as Figure 5As shown, the present disclosure also provides a battery pack, including the liquid cooling assembly, base frame 3, side plate 4, battery module 5 and cover body 6 as described above, the battery module 5 is arranged on the liquid cooling base plate 1, including multiple columns of battery cells 51, the liquid cooling base plate 1 is arranged on the base frame 3, connected to the base frame 3, the harmonica tube 23 is arranged between two adjacent battery cells 51, the side plate 4 is arranged on the outside of the battery module 5 along the length direction of the liquid cooling assembly, parallel to the harmonica tube 23 and connected to the base frame 3; the cover body 6 covers the battery module 5 and is connected to the base frame 3.

[0082] Specifically, the base frame 3 is formed by welding a hollow metal frame and a plurality of metal bars arranged in the hollow part of the metal frame. More specifically, the plurality of metal bars are parallel to each other and are arranged in the metal frame along the width direction of the metal frame and connected to the inner side surface of the metal frame.

[0083] The battery module 5 is arranged on the liquid-cooled base plate 1, including multiple columns of battery cells 51, and harmonica tubes 23 are arranged between two adjacent columns of battery cells 51. The multiple groups of harmonica tubes 23 are connected with the diversion port 12 through the diversion channel 21, and are connected with the confluence port 14 through the confluence channel 22; the side panel 4 is arranged on the outside of the battery module 5, parallel to the harmonica tubes 23 and connected to the base frame 3. The setting of the side panel 4 can limit the free expansion of the battery module 5 to a certain extent.

[0084] Furthermore, in order to ensure the supporting performance of the side panel 4 and prevent the side panel 4 from being stretched outward due to battery expansion, the side panel 4 also includes a reinforcement structure, which includes a plurality of reinforcement plates 41 arranged at intervals along the length direction of the side panel 4, the bottom of the reinforcement plate 41 is connected to the base frame 3, and one side of the reinforcement plate 41 is connected to the side panel 4.

[0085] Furthermore, in order to fix multiple rows of battery cells 51 and prevent the battery cells 51 from expanding freely, the battery pack also includes a fixing belt 7. The upper part and both ends of the length direction of the side panel 4 extend outward along the length direction of the side panel 4 to form a snap-in groove. The fixing belt 7 is snap-fitted to the snap-in groove to fix the battery module 5.

[0086] Specifically, the upper part and both ends of the side panel 4 in the length direction respectively extend outward along the length direction of the side panel 4 to form a snap-in groove, that is, two snap-in grooves are formed on one side panel 4, and a total of four snap-in grooves are formed on the two side panels 4. The fixing belt 7 is snapped with the snap-in groove and sleeved on the two side panels 4. Preferably, the fixing belt 7 is made of elastic material, and after being snapped with the snap-in groove, the two side panels 4 have a movement tendency to approach the battery module 5, thereby achieving the effect of fixing the battery module 5 and preventing the battery module 5 from expanding freely.

[0087] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0088] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present disclosure.

Claims

1. A liquid cooling component, characterized in that: It comprises a liquid cooling base plate (1) and a harmonica pipe group (2); The liquid cooling base plate (1) comprises a first liquid inlet (11), a flow splitter (12), a first cooling channel (13), a confluence port (14) and a first liquid outlet (15); the flow splitter (12) is arranged at a location of the first cooling channel (13) close to the first liquid inlet (11) and is in communication with the first cooling channel (13); the confluence port (14) is arranged at a location of the first cooling channel (13) close to the first liquid outlet (15) and is in communication with the first cooling channel (13); The harmonica pipe group (2) is arranged on the liquid cooling bottom plate (1), and comprises a shunt channel (21), a merging channel (22) and at least two harmonica pipes (23); the harmonica pipes (23) are used to be placed on the side of the battery core (51) and to be in thermal contact with the battery core (51); the harmonica pipes (23) have a second liquid inlet (231), a second cooling channel (232) and a second liquid outlet (233); one end of the shunt channel (21) is connected to the shunt port (12), and the shunt channel (21) is connected to the second liquid inlet (231) for cooling The cooling liquid is diverted from the diverter port (12) to each of the second liquid inlets (231) through the diverter channel (21); one end of the converging channel (22) is connected to the second liquid outlet (233), and the converging channel (22) is connected to the converging port (14) for allowing the cooling liquid in the second cooling channel (232) to merge into the converging port (14); the converging port (14) is used to merge the cooling liquid in the second cooling channel (232) with the cooling liquid in the first cooling channel (13) to merge into the first liquid outlet (15).

2. The liquid cooling assembly according to claim 1, characterized in that: The harmonica tube (23) near the first liquid inlet (11) is a head harmonica tube, and the harmonica tube (23) near the first liquid outlet (15) is a tail harmonica tube. One end of the shunt channel (21) is connected to the shunt port (12), and the other end is connected to the second liquid inlet (231) of the head harmonica tube. One end of the second liquid outlet (233) of the head harmonica tube is closed; the second liquid inlets (231) of two adjacent harmonica tubes (23) are connected. One end of the confluence channel (22) is connected to the confluence port (14), and the other end is connected to the second liquid outlet (233) of the tail harmonica tube; one end of the second liquid inlet (231) of the tail harmonica tube is closed; and the second liquid outlets (233) of two adjacent harmonica tubes (23) are connected.

3. The liquid cooling assembly according to claim 1, characterized in that: The first cooling flow channel (13) comprises a first liquid inlet main path (131), a first liquid outlet main path (132) and n branch paths (133); The first liquid inlet main path (131) comprises a first liquid inlet end (1311) connected to the first liquid inlet port (11), a first liquid inlet main channel (1312) and a cooling liquid diversion channel (1313); one end of the first liquid inlet main channel (1312) is connected to the first liquid inlet end (1311), and the other end is connected to the cooling liquid diversion channel (1313); the diversion port (12) is arranged at a point on the first liquid inlet main channel (1312) close to the first liquid inlet end (1311), and is connected to the first liquid inlet main channel (1312); the cooling liquid diversion channel (1313) is perpendicular to each of the branches (133); The first liquid outlet main channel (132) comprises a cooling liquid converging channel (1321), a first liquid outlet main channel (1322) and a first liquid outlet end (1323) connected to the first liquid outlet port (15); one end of the first liquid outlet main channel (1322) is connected to the cooling liquid converging channel (1321), and the other end is connected to the first liquid outlet end (1323); the converging port (14) is arranged at a point on the first liquid outlet main channel (1322) close to the first liquid outlet end (1323), and is connected to the first liquid outlet main channel (1322); the first liquid outlet main channel (1322) is parallel to each of the branch channels (133); One end of each of the n branches (133) is connected to the coolant diversion channel (1313) to form a parallel diversion structure, and the other end of each of the n branches (133) is connected to the first liquid outlet main channel (132) to form a parallel confluence structure.

4. The liquid cooling assembly according to claim 3, characterized in that: The branch (133) includes (n-1) first branches (1331) and one second branch (1332); wherein n≥3; the second branch (1332) is formed near the main liquid outlet channel; The first branch (1331) comprises a first liquid inlet branch channel (1331a), a first heat exchange channel structure (1331b) and a first liquid outlet branch channel (1331c), wherein the first heat exchange channel structure (1331b) comprises at least two parallel heat exchange channels; The second branch (1332) includes a second liquid inlet branch channel (1332a), a second heat exchange channel structure (1332b) and a second liquid outlet branch channel (1332c), and the second heat exchange channel structure (1332b) includes a single heat exchange channel.

5. The liquid cooling assembly according to claim 3, characterized in that: The first liquid inlet (11) and the first liquid outlet (15) are arranged at the same end in the length direction of the liquid cooling base plate (1), and a channel is formed between the first liquid inlet end (1311) and the first liquid outlet end (1323), and both ends of the channel are closed.

6. The liquid cooling assembly according to claim 1, characterized in that: The second cooling channel (232) comprises a second liquid inlet main path (2321) and a second liquid outlet main path (2322); one end of the second liquid inlet main path (2321) is connected to the second liquid inlet port (231), and the other end is connected to one end of the second liquid outlet main path (2322); the other end of the second liquid outlet main path (2322) is connected to the second liquid outlet port (233).

7. The liquid cooling assembly according to claim 1, characterized in that: The harmonica pipe (23) is arranged perpendicular to the liquid-cooling bottom plate (1).

8. A battery pack, characterized in that: The invention comprises a liquid cooling assembly as claimed in any one of claims 1 to 7, a base frame (3), a side plate (4), a battery module (5) and a cover body (6), wherein the battery module (5) is arranged on the liquid cooling base plate (1) and comprises a plurality of rows of battery cells (51), the liquid cooling base plate (1) is arranged on the base frame (3) and is connected to the base frame (3), the harmonica tube (23) is arranged between two adjacent battery cells (51), the side plate (4) is arranged on the outer side of the battery module (5) along the length direction of the liquid cooling assembly, is parallel to the harmonica tube (23) and is connected to the base frame (3); the cover body (6) covers a plurality of groups of battery modules (5) and is connected to the base frame (3).

9. The battery pack according to claim 8, characterized in that: The side panel (4) further comprises a reinforcement structure, wherein the reinforcement structure comprises a plurality of reinforcement plates (41) arranged at intervals along the length direction of the side panel (4), the bottom of the reinforcement plate (41) being connected to the base frame (3), and one side surface of the reinforcement plate (41) being connected to the side panel (4).

10. The battery pack according to claim 8, characterized in that: It also includes a fixing belt (7), and the upper part and both ends of the length direction of the side plate (4) extend outward along the length direction of the side plate (4) to form a clamping groove, and the fixing belt (7) is clamped with the clamping groove to fix the battery module (5).

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