Liquid cooling system and battery system

Abstract

The utility model relates to a liquid cooling system and a battery system. The liquid cooling system comprises a flow dividing piece, a side liquid cooling assembly and a bottom liquid cooling assembly, the flow dividing piece is provided with a flow dividing groove extending in the length direction, and the inner wall of the flow dividing groove is provided with multiple groups of flow dividing openings symmetrical in the width direction; the flow dividing piece further comprises a liquid inlet part, and the liquid inlet part communicates with the flow dividing groove. Each side liquid cooling assembly comprises a plurality of side liquid cooling pieces arranged at intervals in the length direction, the side liquid cooling pieces extend in the width direction, and the side liquid cooling assemblies are symmetrically distributed on the two sides of the flow dividing piece in the width direction. Each side liquid cooling piece comprises a first flow channel, and the first flow channel is communicated with one shunting port; the flow dividing pieces and the side liquid cooling assemblies are arranged on the bottom liquid cooling assembly, the bottom liquid cooling assembly comprises a liquid outlet part, a flow collecting channel and a plurality of second flow channels, the first flow channel of each side liquid cooling piece is correspondingly communicated with one second flow channel, and the second flow channels are communicated with the liquid outlet part through the flow collecting channels. The problem of low charging and discharging efficiency caused by heat source aggregation at the side part of the battery cell is solved.

Description

Technical Field

[0001] The present disclosure relates to the field of liquid cooling technology, and particularly to a liquid cooling system and a battery system. Background Art

[0002] With the development of battery technology, the power and energy density of batteries are getting higher and higher, and the heat generated by the batteries also increases accordingly, which puts forward higher requirements for the battery cooling system.

[0003] Currently, the conventional liquid cooling plate of energy storage batteries is placed at the bottom, with the liquid cooling plate placed under the battery cells, and heat conduction mainly occurs between the bottom of the battery cells and the liquid cooling plate. Since the bottom area of the battery cells is smaller than the side area, heat sources are likely to accumulate on the side of the battery cells during actual charge and discharge operations, resulting in uneven temperature in the vertical direction of the battery cells and affecting the charge and discharge efficiency of the overall battery module. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a liquid cooling system and a battery system to solve the problem of low charge and discharge efficiency caused by heat source aggregation on the side of the battery cells.

[0005] An embodiment of the present disclosure provides a liquid cooling system, which includes a flow splitting member, side liquid cooling components, and a bottom liquid cooling component. The flow splitting member is provided with a flow splitting groove extending along the length direction, and a plurality of symmetrically arranged flow splitting ports along the width direction are provided on the inner wall of the flow splitting groove; the flow splitting member further includes a liquid inlet portion, and the liquid inlet portion is communicated with the flow splitting groove; the side liquid cooling components include a plurality of side liquid cooling members arranged at intervals along the length direction, the side liquid cooling members extend along the width direction, and the side liquid cooling components are symmetrically distributed on both sides of the flow splitting member along the width direction; each side liquid cooling member includes a first flow channel, and the first flow channel is communicated with a flow splitting port; the flow splitting member and the side liquid cooling components are both arranged on the bottom liquid cooling component, and the bottom liquid cooling component includes a liquid outlet portion, a collecting channel, and a plurality of second flow channels. The first flow channel of each side liquid cooling member corresponds to and is communicated with a second flow channel, and the second flow channels are all communicated with the liquid outlet portion through the collecting channel.

[0006] In the liquid cooling system provided by the embodiment of the present disclosure, after the fluid enters the flow splitting member from the liquid inlet portion, it can simultaneously enter the first flow channels of the symmetric side liquid cooling members, so that the side liquid cooling members located in the middle of the battery cells exchange heat with the battery cells on both sides at the same time, preventing heat source accumulation on the side of the battery cells and improving the side temperature; after passing through the first flow channels, the coolant enters the second flow channels and finally flows out from the liquid outlet portion, enabling the bottom of the battery cells to exchange heat with the bottom liquid cooling component, fully increasing the heat exchange area between the battery cells and the liquid cooling system, and effectively improving the temperature change efficiency of the battery.

[0007] The liquid cooling system provided by the embodiments of the present disclosure has an inlet part arranged on the flow dividing member which can be correspondingly connected to an external liquid supply pipe, and an outlet part arranged on the bottom liquid cooling assembly which can be connected to an external liquid return pipe, reducing the pipeline joints of the liquid cooling system. The arrangement of the flow dividing member enables the liquid cooling system to have no pipelines, reducing the risk of liquid leakage.

[0008] In some embodiments, the flow dividing member further includes a partition strip which extends along the length direction and is located inside the flow dividing groove to divide the flow dividing groove along the width direction.

[0009] With such an arrangement, the fluid flows along both sides of the partition strip in the flow dividing groove and then passes through the flow dividing ports, the first flow channels on both sides, and the second flow channels in sequence and then returns to the outlet part, forming a parallel flow channel distribution, improving the rationality of the distribution of the fluid heat exchange paths.

[0010] In some embodiments, the side liquid cooling member includes a side sealing plate and a side flow channel plate stacked in sequence. The side flow channel plate is provided with a first flow channel on the side facing the side sealing plate, and the side sealing plate is connected to the side flow channel plate to seal the first flow channel.

[0011] With such an arrangement, the side sealing plate prevents the fluid in the first flow channel from leaking out, facilitating the fluid to quickly enter the second flow channel through the first flow channel, reducing the risk of liquid leakage.

[0012] In some embodiments, the two ends of the first flow channel are respectively a first liquid inlet and a first liquid outlet. The first liquid inlet is communicated with the flow dividing port, and the first liquid outlet is communicated with the second flow channel; the first liquid outlet is located at the lower end of the side liquid cooling member on the side away from the flow dividing member.

[0013] With such an arrangement, the first liquid outlet enables the fluid to flow from the two sides away from the flow dividing member to the middle in the bottom liquid cooling assembly and then converge into the collecting channel, which is beneficial to the convergence of the fluid. At the same time, the number of liquid outlet pipelines is reduced, improving the installation efficiency of the liquid cooling system.

[0014] In some embodiments, the first flow channel includes a plurality of bending sections, and the bending sections are arc surfaces; the inner wall of the first flow channel is rectangular or wavy.

[0015] The plurality of bending sections increase the area of the first flow channel and improve the heat exchange efficiency. The arc surfaces of the bending sections can reduce the flow resistance of the fluid. The rectangular or wavy shape can enhance the fluid disturbance, which is beneficial to improving the heat exchange performance of the side liquid cooling member.

[0016] In some embodiments, the bottom liquid cooling assembly includes an upper sealing plate and a lower flow channel plate stacked in sequence. The lower flow channel plate is provided with a second flow channel and a collecting channel on the side facing the upper sealing plate, and the upper sealing plate is connected to the lower flow channel plate to seal the second flow channel and the collecting channel.

[0017] With such a setting, the upper sealing plate prevents the fluid in the second flow channel from leaking out, facilitating the rapid passage of the fluid through the second flow channel into the liquid outlet part and reducing the risk of liquid leakage.

[0018] In some embodiments, each second flow channel extends in the width direction, the upper sealing plate is provided with a plurality of second liquid inlets which are arranged corresponding to the first liquid outlet; the lower flow channel plate is further provided with a plurality of flow disturbing blocks which are arranged at intervals in the width direction in the second flow channel.

[0019] With such a setting, the fluid sequentially enters the second flow channel through the first liquid outlet and the second liquid inlet of the first flow channel. Since the temperature of the fluid in the second flow channel is higher than that in the first flow channel, the flow disturbing blocks can enhance the fluid disturbance, further enhancing the heat exchange effect at the bottom of the battery cell and reducing the temperature difference between the side and the bottom of the battery cell.

[0020] In some embodiments, the shape of the flow disturbing block is diamond-shaped or droplet-shaped; the flow disturbing block is arranged close to the second liquid inlet along the length direction.

[0021] With such a setting, the flow disturbing blocks can reduce the flow velocity of the fluid near the second liquid inlet and increase the flow rate in another area in the second flow channel, which is beneficial to the uniform distribution of the fluid inside the flow channel and improves the heat exchange uniformity of the bottom liquid cooling component.

[0022] In some embodiments, the lower flow channel plate is further provided with a flow turning groove, one ends of the two collecting channels are respectively connected to the flow turning groove, and the flow turning groove communicates with the liquid outlet part. The interval between the liquid inlet part and the liquid outlet part in the width direction is greater than 10 cm.

[0023] With such a setting, the liquid inlet part and the liquid outlet part are staggered, facilitating the routing and installation of external pipelines.

[0024] The present disclosure provides a battery system, including the above liquid cooling system and a plurality of battery cells. The bottom of the battery cell abuts against the bottom liquid cooling component, the side of the battery cell abuts against the side liquid cooling component, and the tops of the plurality of battery cells are connected to each other.

[0025] In the battery system provided by the present disclosure, the fluid enters the side liquid cooling plate through the shunt port. The side liquid cooling component exchanges heat with the side of the battery cell to prevent the accumulation of heat sources on the side of the battery cell and improve the side temperature; the bottom liquid cooling component exchanges heat with the bottom of the battery cell, sufficiently increasing the heat exchange area between the plurality of battery cells and the liquid cooling system and effectively improving the charge and discharge efficiency of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the liquid cooling system in the embodiment of the present disclosure;

[0027] Figure 2 It is a structural diagram of the side liquid cooling component and the shunt component in the embodiment of the present disclosure;

[0028] Figure 3 Structural diagram of the bottom liquid cooling component in the embodiments of the present disclosure;

[0029] Figure 4 Overall structural schematic diagram of the battery system in the embodiments of the present disclosure.

[0030] Reference numerals:

[0031] 100, battery system; 10, liquid cooling system; 1, shunt member; 11, shunt groove; 111, shunt port; 12, liquid inlet portion; 13, partition bar; 2, side liquid cooling component; 21, side liquid cooling member; 211, side flow channel plate; 2111, first flow channel; 21111, bent section; 2112, first liquid inlet; 2113, first liquid outlet; 212, side sealing plate; 3, bottom liquid cooling component; 31, downstream flow channel plate; 311, second flow channel; 312, collecting flow channel; 313, turbulence block; 314, flow turning groove; 32, upper sealing plate; 321, second liquid inlet; 33, liquid outlet portion; 20, battery cell. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the embodiments of the present disclosure more obvious and understandable, the following will describe the detailed implementation manners of the embodiments of the present disclosure in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the embodiments of the present disclosure. However, the embodiments of the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the embodiments of the present disclosure. Therefore, the embodiments of the present disclosure are not limited by the specific embodiments disclosed below.

[0033] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present disclosure.

[0034] In the embodiments of the present disclosure, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the liquid level height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the liquid level height of the first feature is lower than that of the second feature.

[0035] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Exemplarily, the first flow channel may also be referred to as the second flow channel, and the second flow channel may also be referred to as the first flow channel. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the embodiments of the present disclosure, unless otherwise clearly specified or limited, the terms "connected", "coupled", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a flexible connection or a rigid connection along at least one direction; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, or there may be an intermediate medium while being directly connected, and it may also be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. The terms "installed", "fixed", etc. can be understood in a broad sense as a connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Referring to Figure 1 , Figure 1 shows the overall structure of the liquid cooling system 10 of the embodiments of the present disclosure. The present disclosure relates to the technical field of liquid cooling.

[0038] Combined with Figure 2 and Figure 3 , the embodiments of the present disclosure provide a liquid cooling system 10, which includes a flow dividing member 1, a side liquid cooling assembly 2 and a bottom liquid cooling assembly 3. Exemplarily, the flow dividing member 1 is communicated with the side liquid cooling assembly 2, the side liquid cooling assembly 2 is communicated with the bottom liquid cooling assembly 3, and both the side liquid cooling assembly 2 and the flow dividing member 1 are located above the bottom liquid cooling assembly 3.

[0039] The flow dividing member 1 is provided with a flow dividing groove 11 extending in the length direction, and the inner wall of the flow dividing groove 11 is provided with multi-component flow outlets 111 symmetrical in the width direction; the flow dividing member 1 also includes a liquid inlet 12 connected to the flow dividing groove 11 .

[0040] The side liquid cooling assembly 2 includes a plurality of side liquid cooling parts 21 spaced apart along the length direction, and the side liquid cooling parts 21 extend along the width direction. The side liquid cooling assembly 2 is symmetrically distributed on both sides of the diverter 1 along the width direction; each side liquid cooling part 21 includes a first flow channel 2111, and the first flow channel 2111 is connected to a diverter port 111. Exemplarily, the width direction is the left-right direction, the length direction is the front-back direction, and the height direction is the up-down direction. The fluid flows from the liquid inlet 12 into the diverter slot 11, and the left and right inner walls of the diverter slot 11 are provided with a plurality of diverter ports 111, and each diverter port 111 corresponds to a first flow channel 2111, and the fluid flows from the plurality of diverter ports 111 into the plurality of side liquid cooling parts 21 on the left and right sides at the same time.

[0041] The bottom liquid cooling component 3 includes a liquid outlet 33, a flow collecting channel 312, and a plurality of second flow channels 311. The first flow channel 2111 of each side liquid cooling component 21 is connected to a corresponding second flow channel 311, and the second flow channels 311 are connected to the liquid outlet 33 through the flow collecting channel 312. Exemplarily, the fluid in each first flow channel 2111 flows into a corresponding second flow channel 311, and the fluids in the plurality of second flow channels 311 on both sides are respectively merged into two flow collecting channels 312, and finally the fluid flows out from the liquid outlet 33 connected to the two flow collecting channels 312.

[0042] In the liquid cooling system 10 provided in the embodiment of the present disclosure, the fluid can simultaneously enter the first flow channel 2111 of the symmetrical side liquid cooling component 21 after entering the diverter 1 from the liquid inlet portion 12, so that the side liquid cooling component 21 located in the middle of the battery cell 20 can simultaneously exchange heat with the battery cells 20 on both sides, thereby preventing heat source accumulation on the sides of the battery cells 20 and improving the side temperature; the coolant enters the second flow channel 311 after passing through the first flow channel 2111 and finally flows out from the liquid outlet portion 33, so that the bottom of the battery cell 20 exchanges heat with the bottom liquid cooling component 3, thereby fully increasing the heat exchange area between the battery cell 20 and the liquid cooling system 10, and effectively improving the temperature change efficiency of the battery.

[0043] In the liquid cooling system 10 provided in the embodiment of the present disclosure, the liquid inlet 12 is arranged on the diverter 1 and can be connected to the external liquid supply pipeline, and the liquid outlet 33 is arranged on the bottom liquid cooling component 3 and can be connected to the external liquid return pipeline, thereby reducing the pipe joints of the liquid cooling system 10. The setting of the diverter 1 makes the liquid cooling system 10 free of pipelines, reducing the risk of leakage.

[0044] Exemplarily, the flow divider 1 is in the shape of a cuboid, the side liquid cooling member 21 is in the shape of a plate, and the bottom liquid cooling component 3 is in the shape of a plate.

[0045] Exemplarily, the length of the flow splitter 1 is less than the length of the bottom liquid cooling assembly 3. The flow splitter 1 is located in the middle part of the bottom liquid cooling assembly 3, such that the areas of the bottom liquid cooling assemblies 3 on the left and right sides are equal. The side liquid cooling assemblies 2 are symmetrically distributed on the left and right sides of the flow splitter 1.

[0046] Exemplarily, the intervals between the plurality of side liquid cooling members 21 in the front-rear direction are all equal.

[0047] Exemplarily, the shapes of the liquid inlet portion 12 and the liquid outlet portion 33 are both circular pipelines. The liquid inlet portion 12 is located at the upper part of the front end of the flow splitter 1.

[0048] Reference Figure 2 , in some embodiments, the flow splitter 1 further includes a partition strip 13. The partition strip 13 extends along the length direction. The partition strip 13 is located inside the flow splitting groove 11 and divides the flow splitting groove 11 in the width direction. Exemplarily, the partition strip 13 is a rectangular plate-like structure. The partition strip 13 divides the flow splitting groove 11 into symmetric left and right sides. The height of the partition strip 13 is lower than the height of the flow splitter 1, and the length of the partition strip 13 is less than the length of the flow splitting groove 11.

[0049] With such an arrangement, after the fluid flows into the flow splitting groove 11 through the liquid inlet portion 12, it flows along both sides of the partition strip 13 and then passes through the flow splitting openings 111, the first flow channels 2111 on both sides, and the second flow channels 311 in sequence and returns to the liquid outlet portion 33, forming a parallel flow channel distribution, which improves the rationality of the distribution of the fluid heat exchange path.

[0050] Reference Figure 1 and Figure 2 , in some embodiments, the side liquid cooling member 21 includes a side sealing plate 212 and a side flow channel plate 211 stacked in sequence. The side flow channel plate 211 is provided with a first flow channel 2111 on the side facing the side sealing plate 212. The side sealing plate 212 is connected to the side flow channel plate 211 to seal the first flow channel 2111.

[0051] With such an arrangement, the side sealing plate 212 prevents the fluid in the first flow channel 2111 from leaking out, facilitating the fluid to quickly pass through the first flow channel 2111 and enter the second flow channel 311, reducing the risk of liquid leakage.

[0052] Exemplarily, the side sealing plate 212 is located in front of the side flow channel plate 211. The first flow channel 2111 is opened on the front side of the side flow channel plate 211. The first flow channel 2111 is distributed in an S shape on the side flow channel plate 211. The straight portion of the first flow channel 2111 extends in the left-right direction. The width of the straight portion of the first flow channel 2111 is relatively wide, which can increase the heat exchange contact area.

[0053] Exemplarily, the thickness of the side sealing plate 212 is much smaller than the thickness of the side flow channel plate 211, facilitating the transfer of the heat on the side of the battery cell 20 to the fluid in the first flow channel 2111.

[0054] Reference Figure 2 In some embodiments, two ends of the first flow channel 2111 are respectively a first liquid inlet 2112 and a first liquid outlet 2113. The first liquid inlet 2112 communicates with the shunt port 111, and the first liquid outlet 2113 communicates with the second flow channel 311. The first liquid outlet 2113 is located at the lower end of the side of the side liquid cooling member 21 away from the shunt member 1.

[0055] With such an arrangement, the first liquid outlet 2113 enables the fluid to flow from both sides away from the shunt member 1 to the middle in the bottom liquid cooling assembly 3, and then converge into the manifold channel 312, which is beneficial to the convergence of the fluid, reduces the number of liquid outlet pipelines at the same time, and improves the installation efficiency of the liquid cooling system 10.

[0056] Reference Figure 2 Exemplarily, the part of the first flow channel 2111 connected to the shunt member 1 is the first liquid inlet 2112, and the part of the first flow channel 2111 connected to the bottom liquid cooling assembly 3 is the first liquid outlet 2113. That is, the fluid flows from the middle part to the left and right sides through the first flow channel 2111.

[0057] Exemplarily, the first liquid inlet 2112 of the first flow channel 2111 on the left side of the shunt member 1 is at the upper end of the right side of the side flow channel plate 211, and the first liquid outlet 2113 of the first flow channel 2111 on the left side of the shunt member 1 is at the lower end of the left side of the side flow channel plate 211. The first liquid inlet 2112 of the first flow channel 2111 on the right side of the shunt member 1 is at the upper end of the left side of the side flow channel plate 211, and the first liquid outlet 2113 of the first flow channel 2111 on the right side of the shunt member 1 is at the lower end of the right side of the side flow channel plate 211.

[0058] Reference Figure 2 In some embodiments, the first flow channel 2111 includes a plurality of bending segments 21111, and the bending segments 21111 are arc surfaces; the inner wall of the first flow channel 2111 is rectangular or wavy.

[0059] The plurality of bending segments 21111 increase the area of the first flow channel 2111 and improve the heat exchange efficiency. The bending segments 21111 being arc surfaces can reduce the flow resistance of the fluid. The rectangular or wavy shape can enhance the fluid disturbance and is beneficial to improving the heat exchange performance of the side liquid cooling member 21.

[0060] In other embodiments, the first flow channel 2111 is formed by arranging liquid separation strips on the side flow channel plate. The liquid separation strips at the bending segments 21111 are arc-shaped, and the edges of the liquid separation strips at the straight segments can be rectangular or wavy to enhance the fluid disturbance and is beneficial to the heat exchange of the side battery cells 20. The number of liquid separation strips is small and the distance between the liquid separation strips is large, effectively increasing the area of the first flow channel 2111.

[0061] Reference Figure 1 andFigure 3 In some embodiments, the bottom liquid cooling assembly 3 includes an upper sealing plate 32 and a downstream channel plate 31 stacked in sequence. A second channel 311 and a manifold channel 312 are formed on one side of the downstream channel plate 31 facing the upper sealing plate 32. The upper sealing plate 32 is connected to the downstream channel plate 31 to seal the second channel 311 and the manifold channel 312.

[0062] With such a setting, the upper sealing plate 32 prevents the fluid in the second channel 311 from leaking out, facilitating the fluid to quickly enter the liquid outlet part 33 through the second channel 311 and reducing the risk of liquid leakage.

[0063] Exemplarily, Figure 1 the upper sealing plate 32 is solid, Figure 3 the upper sealing plate 32 is transparent.

[0064] Exemplarily, the downstream channel plate 31 is divided into left and right sides from the middle part. Two manifold channels 312 extending in the front-rear direction are formed on both sides close to the middle part. Each manifold channel 312 communicates with a plurality of second channels 311 arranged side by side in the front-rear direction. The plurality of second channels 311 are in the shape of long strips extending in the left-right direction.

[0065] Exemplarily, the plurality of second channels 311 are not directly connected. Each second channel 311 communicates with a first channel 2111. The width of each second channel 311 is greater than the width of the bottom of the battery cell 20.

[0066] Exemplarily, the thickness of the upper sealing plate 32 is much smaller than the thickness of the downstream channel plate 31, facilitating the transfer of the heat at the bottom of the battery cell 20 to the fluid in the second channel 311.

[0067] Refer to Figure 3 In some embodiments, each second channel 311 extends in the width direction. The upper sealing plate 32 is provided with a plurality of second liquid inlet ports 321, and the second liquid inlet ports 321 are arranged corresponding to the first liquid outlet ports 2113. The downstream channel plate 31 is further provided with a plurality of flow disturbing blocks 313, and the plurality of flow disturbing blocks 313 are arranged at intervals in the width direction in the second channel 311. Exemplarily, the second liquid inlet ports 321 are formed at the parts near the edges on the left and right sides of the upper sealing plate 32, so that the fluid flows from both sides to the middle in the second channel 311.

[0068] Exemplarily, each second channel 311 is further provided with three flow disturbing blocks 313 arranged at intervals in the left-right direction, and the positions of the plurality of flow disturbing blocks 313 in each second channel 311 are the same.

[0069] With such a setting, the fluid sequentially passes through the first liquid outlet 2113 of the first flow channel 2111 and the second liquid inlet 321 to enter the second flow channel 311. Since the temperature of the fluid increases in the second flow channel 311 compared with that in the first flow channel 2111, the turbulence block 313 can enhance the fluid disturbance, further enhancing the heat exchange effect at the bottom of the battery cell 20 and reducing the temperature difference between the side and bottom of the battery cell 20.

[0070] Exemplarily, the second water inlet is correspondingly communicated with the inner wall of the second flow channel 311 near the front end. In other embodiments, the second water inlet is correspondingly communicated with the inner wall of the second flow channel 311 near the rear end, or the second water inlet is correspondingly communicated with the middle part of the second flow channel 311 in the front-rear direction.

[0071] Reference Figure 3 , in some of these embodiments, the shape of the turbulence block 313 is diamond-shaped or droplet-shaped; the turbulence block 313 is arranged along the length direction close to the second liquid inlet 321.

[0072] With such a setting, the turbulence block 313 can reduce the fluid flow rate near the second liquid inlet 321 and increase the flow rate in another area of the second flow channel 311, which is beneficial to the uniform distribution of the fluid inside the flow channel and improves the heat exchange uniformity of the bottom liquid cooling assembly 3.

[0073] Exemplarily, the turbulence block 313 is at the 1 / 3 position of the second flow channel 311 in the front-rear direction.

[0074] Reference Figure 3 , in some of these embodiments, the downstream flow channel plate 31 is further provided with a flow diversion groove 314. One end of each of the two flow collecting channels 312 is respectively connected to the flow diversion groove 314, and the flow diversion groove 314 is communicated with the liquid outlet part 33. The interval between the liquid inlet part 12 and the liquid outlet part 33 in the width direction is greater than 10 cm.

[0075] Exemplarily, the flow diversion groove 314 is located at the front end near the left side of the downstream flow channel plate 31, and the liquid outlet part 33 is communicated with the left end of the flow diversion groove 314. Since the liquid inlet is located at the front end of the flow dividing member 1, the liquid inlet and the liquid outlet are not in the same plane and have a certain interval in the width direction.

[0076] With such a setting, the liquid inlet part 12 and the liquid outlet part 33 are staggered, which is convenient for the routing and installation of external pipelines.

[0077] In other embodiments, the flow diversion groove 314 and the liquid outlet can also be located at the rear end part of the downstream flow channel plate 31.

[0078] In some of these embodiments, an external liquid supply pipeline provides fluid for the liquid cooling system 10. The fluid enters the liquid inlet part 12 and successively passes through the shunt tank 11, the shunt port 111, the first liquid inlet 2112 on the upper side, the first flow channel 2111, the first liquid outlet 2113 on the lower side, the second liquid inlet 321, the second flow channel 311, and the manifold channel 312 to converge at the flow diversion tank 314, and then flows out of the liquid cooling system 10 through the liquid outlet part 33 and enters the external liquid return pipeline.

[0079] Reference Figure 4 , the embodiment of the present disclosure provides a battery system 100, including the above-mentioned liquid cooling system 10 and a plurality of battery cells 20. The bottom of the battery cell 20 abuts against the bottom liquid cooling assembly 3, the side of the battery cell 20 abuts against the side liquid cooling assembly 2, and the tops of the plurality of battery cells 20 are connected to each other.

[0080] In the battery system 100 provided by the embodiment of the present disclosure, the fluid enters the side liquid cooling plate through the shunt port 111. The side liquid cooling member 21 exchanges heat with the side of the battery cell 20 to prevent the accumulation of heat sources on the side of the battery cell 20 and improve the side temperature; the bottom liquid cooling assembly 3 exchanges heat with the bottom of the battery cell 20, which fully increases the heat exchange area between the plurality of battery cells 20 and the liquid cooling system 10 and effectively improves the charge and discharge efficiency of the battery system 100.

[0081] Exemplarily, the number of side liquid cooling plates and the area of the bottom liquid cooling assembly 3 can be set according to the number of battery cells 20.

[0082] The technical features of the above-disclosed embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0083] The above-disclosed embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. Liquid cooling system, characterized in that, include: The flow dividing member is provided with a flow dividing groove extending in the length direction, and the inner wall of the flow dividing groove is provided with multiple group flow outlets symmetrical in the width direction; the flow dividing member also includes a liquid inlet portion, and the liquid inlet portion is connected to the flow dividing groove; A side liquid cooling assembly, comprising a plurality of side liquid cooling parts spaced apart along the length direction, the side liquid cooling parts extending along the width direction, the side liquid cooling parts symmetrically distributed on both sides of the flow dividing part along the width direction; each of the side liquid cooling parts comprises a first flow channel, the first flow channel being connected to one of the flow dividing ports; and The bottom liquid cooling component, the diverter and the side liquid cooling component are both arranged on the bottom liquid cooling component, the bottom liquid cooling component includes a liquid outlet, a collecting channel and a plurality of second flow channels, each first flow channel of the side liquid cooling component is connected to a corresponding second flow channel, and the second flow channels are all connected to the liquid outlet through the collecting channel.

2. The liquid cooling system according to claim 1, characterized in that: The flow dividing member further comprises a dividing bar, which extends along the length direction. The dividing bar is located inside the flow dividing slot and divides the flow dividing slot along the width direction.

3. The liquid cooling system according to claim 2, characterized in that: The side liquid cooling component includes a side sealing plate and a side flow channel plate stacked in sequence, the side flow channel plate is provided with the first flow channel on a side facing the side sealing plate, and the side sealing plate is connected to the side flow channel plate for sealing the first flow channel.

4. The liquid cooling system according to claim 3, characterized in that: The two ends of the first flow channel are respectively a first liquid inlet and a first liquid outlet, the first liquid inlet is connected to the diversion port, and the first liquid outlet is connected to the second flow channel; The first liquid outlet is located at a lower end of a side of the side liquid cooling element away from the flow dividing element.

5. The liquid cooling system according to claim 4, characterized in that: The first flow channel includes a plurality of bending sections, and the bending sections are arc surfaces; the inner wall of the first flow channel is rectangular or wavy.

6. The liquid cooling system according to claim 4, characterized in that: The bottom liquid cooling assembly includes an upper sealing plate and a lower flow channel plate stacked in sequence, the lower flow channel plate is provided with the second flow channel and the collecting channel on one side facing the upper sealing plate, and the upper sealing plate is connected to the lower flow channel plate for sealing the second flow channel and the collecting channel.

7. The liquid cooling system according to claim 6, characterized in that: Each of the second flow channels extends along the width direction, and the upper sealing plate is provided with a plurality of second liquid inlets, and the second liquid inlets are arranged corresponding to the first liquid outlets; The lower flow channel plate is further provided with a plurality of spoiler blocks, and the plurality of spoiler blocks are arranged at intervals in the second flow channel along the width direction.

8. The liquid cooling system according to claim 7, characterized in that: The spoiler is in a rhombus or droplet shape; the spoiler is arranged close to the second liquid inlet along the length direction.

9. The liquid cooling system according to claim 6, characterized in that: The lower flow channel plate is also provided with a transfer groove, one end of the two collecting channels is respectively connected to the transfer groove, and the transfer groove is connected to the liquid outlet; The interval between the liquid inlet and the liquid outlet along the width direction is greater than 10 cm.

10. A battery system, characterized in that It comprises the liquid cooling system according to any one of claims 1 to 9 and a plurality of battery cells, wherein the bottom of the battery cell abuts against the bottom liquid cooling component, the side of the battery cell abuts against the side liquid cooling component, and the tops of the plurality of battery cells are connected to each other.

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