CN219610548U - Liquid cooling system and battery pack - Google Patents
Liquid cooling system and battery pack Download PDFInfo
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- CN219610548U CN219610548U CN202320320035.8U CN202320320035U CN219610548U CN 219610548 U CN219610548 U CN 219610548U CN 202320320035 U CN202320320035 U CN 202320320035U CN 219610548 U CN219610548 U CN 219610548U
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- 239000007788 liquid Substances 0.000 title claims abstract description 568
- 238000001816 cooling Methods 0.000 title claims abstract description 175
- 239000000178 monomer Substances 0.000 claims abstract description 50
- 239000000110 cooling liquid Substances 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Abstract
The utility model provides a liquid cooling system and a battery pack, wherein the liquid cooling system comprises: the liquid cooling system comprises a plurality of combined liquid cooling modules, a liquid inlet pipeline assembly and a liquid outlet pipeline assembly, wherein the combined liquid cooling modules are sequentially arranged in a first direction, each combined liquid cooling module comprises a plurality of liquid cooling monomers which are stacked in a second direction, and the second direction is perpendicular to the first direction; the liquid inlet pipeline assembly comprises a plurality of liquid inlet pipeline main pipelines which are sequentially arranged in the first direction, the liquid inlet pipeline main pipelines are mutually connected in series, and a plurality of liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid inlet pipeline main pipelines; the liquid outlet pipeline assembly comprises a plurality of liquid outlet pipeline main pipelines which are sequentially arranged in the first direction and are mutually connected in series, and a plurality of liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid outlet pipeline main pipelines. The liquid cooling system provided by the utility model has the advantages of small system pressure drop, less flow regulation variable and high flow regulation consistency.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a liquid cooling system and a battery pack.
Background
The power battery pack is used as an energy storage and power output device of the electric automobile, is a power source of the electric automobile and is a guarantee of cruising ability of the electric automobile. In order to make the power battery pack work normally and safely, the battery module in the power battery pack needs to be provided with a corresponding heat dissipation structure, such as a liquid cooling system, so that heat generated by the work of the battery module can be dissipated as soon as possible.
The conventional power battery pack generally includes a plurality of battery modules, and the battery cells in each battery module are arranged in a single-layer arrangement manner. In order to meet the higher requirements of users on the cruising ability of the electric automobile, each battery module can contain more electric cores and store larger electric quantity, and research and development personnel creatively propose the arrangement form of the double-layer battery module, but the liquid cooling system of the double-layer battery module has the problems of larger system pressure drop, more flow regulation variables and inconsistent flow regulation.
In view of the above technical drawbacks, it is desirable to design a liquid cooling system that can reduce the pressure drop of the system and is easy to adjust the flow rate.
Disclosure of Invention
The embodiment of the utility model provides a liquid cooling system and a battery pack, which can solve the technical problems of larger system pressure drop and difficult flow regulation of the liquid cooling system applied to a double-layer battery module in the related technology.
In a first aspect, embodiments of the present utility model provide a liquid cooling system, including: the liquid cooling system comprises m combined liquid cooling modules which are sequentially arranged in a first direction, wherein each combined liquid cooling module comprises n liquid cooling monomers which are stacked in a second direction, the second direction is perpendicular to the first direction, and m and n are integers larger than 1; the liquid inlet pipeline assembly comprises m liquid inlet pipeline main pipelines which are sequentially arranged in the first direction, the m liquid inlet pipeline main pipelines are mutually connected in series, and n liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid inlet pipeline main pipelines; and the liquid outlet pipeline assembly comprises m liquid outlet pipeline main pipelines which are sequentially arranged in the first direction, the m liquid outlet pipeline main pipelines are mutually connected in series, and n liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid outlet pipeline main pipelines.
In an embodiment, the combined liquid cooling module has a central axis parallel to the first direction, and the liquid inlet pipeline assembly and the liquid outlet pipeline assembly use the central axis as a symmetry axis.
In an embodiment, the liquid inlet pipeline assembly further includes m×n liquid inlet pipe branches, the liquid cooling monomer is communicated with the liquid inlet pipe main pipeline through the liquid inlet pipe branches, wherein n liquid inlet pipe branches in the second direction use the liquid inlet pipe main pipeline as a symmetry axis; the liquid outlet pipeline assembly further comprises m x n liquid outlet pipeline branches, and the liquid cooling monomers are communicated with the liquid outlet pipeline main pipeline through the liquid outlet pipeline branches, wherein n liquid outlet pipeline branches in the second direction take the liquid outlet pipeline main pipeline as a symmetry axis.
In one embodiment, the liquid inlet pipeline assembly comprises a total liquid inlet which is communicated with a first liquid inlet pipeline main pipeline arranged in the first direction; the liquid outlet pipeline assembly comprises a total liquid outlet which is communicated with a first liquid outlet pipeline main pipeline arranged in the first direction; the liquid cooling system further comprises a cold plate, a cold plate liquid inlet pipe and a cold plate liquid outlet pipe, wherein the cold plate is arranged on one side, away from the 1 st combined liquid cooling module arranged in the first direction, of the m combined liquid cooling module arranged in the first direction, the cold plate liquid inlet pipe is communicated with a liquid inlet pipe main path corresponding to the m combined liquid cooling module, and the cold plate liquid outlet pipe is communicated with a liquid outlet pipe main path corresponding to the m combined liquid cooling module.
In an embodiment, m=3, where the inner diameters of the m liquid inlet pipe main paths and the m liquid outlet pipe main paths are the first inner diameter; the cold plate liquid inlet pipe and the cold plate liquid outlet pipe are connected in parallel, and the inner diameter of the first liquid inlet pipe branch and the inner diameter of the first liquid outlet pipe branch which are arranged in the first direction are the second inner diameter; the inner diameters of the second liquid inlet pipe branch and the third liquid inlet pipe branch which are arranged in the first direction, and the second liquid outlet pipe branch and the third liquid outlet pipe branch which are arranged in the first direction are third inner diameters; wherein the first inner diameter is greater than the third inner diameter, which is greater than the second inner diameter.
In an embodiment, n=2, where the liquid inlet pipeline assembly further includes m liquid inlet four-way connectors, the liquid inlet four-way connectors include a first liquid inlet end, a first liquid outlet end, and two second liquid outlet ends, where the first liquid inlet end is connected with the liquid inlet pipeline main pipeline; the first liquid inlet end and the first liquid outlet end extend along the first direction, and the first liquid outlet end is connected with the liquid inlet pipe main path or the cold plate liquid inlet pipe; the two second liquid outlet ends take the main path of the liquid inlet pipe as a symmetry axis; the liquid outlet pipeline assembly further comprises m liquid outlet four-way connectors, wherein each liquid outlet four-way connector comprises a third liquid outlet end, a third liquid inlet end and two fourth liquid inlet ends, and the third liquid outlet ends are connected with the liquid outlet pipeline main pipeline; the third liquid outlet end and the third liquid inlet end extend along the first direction, and the third liquid inlet end is connected with the liquid outlet pipe main path or the cold plate liquid outlet pipe; the two fourth liquid inlet ends take the main liquid outlet pipe as symmetry axes.
In an embodiment, the liquid inlet four-way joint is provided with a first throttling device, and the liquid outlet four-way joint is provided with a second throttling device.
In one embodiment, the liquid-cooled monomer comprises: the plurality of serpentine pipes are sequentially arranged in the first direction, each serpentine pipe comprises a first end and a second end, the first end is used for inputting cooling liquid, and the second end is used for outputting the cooling liquid; the first corrugated connecting assembly comprises a first liquid inlet, a plurality of first liquid outlets and a plurality of first corrugated connecting pipes which are sequentially arranged in the first direction and are mutually connected in series, wherein the first liquid inlet is communicated with the liquid inlet pipe main path, the first liquid outlet is communicated with the first end of the serpentine pipe, and the first corrugated connecting pipes are connected with two adjacent first liquid outlets; the second ripple coupling assembling, including second liquid outlet, a plurality of second inlet and be in a plurality of second ripple connecting pipes of arranging in proper order and establishing ties each other in the first direction, wherein, the second liquid outlet with the drain pipe main way is linked together, the second inlet with the second end of coiled pipe is linked together, two adjacent second inlets are connected to the second ripple connecting pipe.
In a second aspect, an embodiment of the present utility model provides a battery pack, where the battery pack includes m battery modules and the liquid cooling system described in any one of the foregoing embodiments, where the liquid cooling system includes m combined liquid cooling modules sequentially arranged in a first direction, and m is an integer greater than 1.
In an embodiment, the battery module includes n battery module monomers that layer-by-layer set up in the second direction, and set up in arbitrary adjacent two tray between the liquid cooling monomer, wherein, feed liquor pipe main road in the combination liquid cooling module with the drain pipe main road is fixed on the tray, just the second direction is perpendicular to first direction, n is the integer that is greater than 1.
The embodiment of the utility model has the beneficial effects that:
the utility model provides a liquid cooling system and a battery pack, wherein the liquid cooling system comprises: the liquid cooling system comprises a plurality of combined liquid cooling modules, a liquid inlet pipeline assembly and a liquid outlet pipeline assembly, wherein the combined liquid cooling modules are sequentially arranged in a first direction, each combined liquid cooling module comprises a plurality of liquid cooling monomers which are stacked in a second direction, and the second direction is perpendicular to the first direction; the liquid inlet pipeline assembly comprises a plurality of liquid inlet pipeline main pipelines which are sequentially arranged in the first direction, the liquid inlet pipeline main pipelines are mutually connected in series, and a plurality of liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid inlet pipeline main pipelines; the liquid outlet pipeline assembly comprises a plurality of liquid outlet pipeline main pipelines which are sequentially arranged in the first direction and are mutually connected in series, and a plurality of liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid outlet pipeline main pipelines. According to the liquid cooling system provided by the utility model, the liquid cooling monomers which are arranged in a stacked manner can be mutually connected in parallel through the liquid inlet pipe main pipeline and the liquid outlet pipe main pipeline, and as the flow rate in the pipeline is equal to the flow rate in each pipe section which is connected in parallel and the resistance losses of each pipe section which is connected in parallel are equal, the resistance of fluid flowing into each liquid cooling monomer can be reduced, the resistance of the fluid flowing into each liquid cooling monomer is more balanced, and the problem of large system pressure drop caused by the multi-layer arrangement of the liquid cooling monomers is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic top view of a liquid cooling system according to an embodiment of the present utility model;
FIG. 2 is a schematic front view of a liquid cooling system according to an embodiment of the present utility model;
FIG. 3 is a schematic rear view of a liquid cooling system according to an embodiment of the present utility model;
fig. 4 is a schematic perspective view of a combined liquid cooling module according to an embodiment of the utility model;
fig. 5 is a perspective view of a battery pack according to an embodiment of the present utility model.
Reference numerals:
a first direction X; a second direction Y; the flow direction K of the cooling liquid; a central axis AA parallel to the first direction; a liquid cooling system 01; a combined liquid cooling module 10; a liquid-cooled monomer 11; a serpentine tube 111; a first end 1111; a second end 1112; a first corrugated connection assembly 112; a first liquid inlet 1121; a first liquid outlet 1122; a first bellows joint 1123; a second corrugated connection assembly 113; a second liquid outlet 1131; a second fluid inlet 1132; a second bellows joint 1133; a first quick connector A1; a second quick connector A2; a liquid inlet pipeline assembly 20; a liquid inlet pipe main path 21; a feed pipe shunt 22; a total liquid inlet 23; a liquid inlet four-way joint 24; a first liquid inlet end 241; first liquid outlet end 242; a second liquid outlet end 243; a liquid outlet pipeline assembly 30; a liquid outlet main 31; a drain pipe shunt 32; a total liquid outlet 33; a liquid outlet four-way joint 34; a third outlet 341; a third liquid inlet 342; a fourth liquid inlet 343; a cold plate 40; a cold plate liquid inlet pipe 41; a cold plate liquid outlet pipe 42; a battery pack 100; a battery module 101; a battery module unit 1011; tray 1012
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
In a first aspect, the present utility model provides a liquid cooling system.
FIG. 1 is a schematic top view of a liquid cooling system according to an embodiment of the present utility model; FIG. 2 is a schematic front view of a liquid cooling system according to an embodiment of the present utility model; FIG. 3 is a schematic rear view of a liquid cooling system according to an embodiment of the present utility model; fig. 4 is a schematic perspective view of a combined liquid cooling module according to an embodiment of the utility model. Referring to fig. 1 to 4, the liquid cooling system 01 includes: m combined liquid cooling modules 10, a liquid inlet pipeline assembly 20 and a liquid outlet pipeline assembly 30. The m combined liquid cooling modules 10 are sequentially arranged in a first direction X, each combined liquid cooling module 10 comprises n liquid cooling monomers 11 which are stacked in a second direction Y, the second direction Y is perpendicular to the first direction X, and m and n are integers larger than 1; the liquid inlet pipeline assembly 20 comprises m liquid inlet pipeline main pipelines 21 which are sequentially arranged in the first direction X and are mutually connected in series, and n liquid cooling monomers 11 in each combined liquid cooling module 10 are respectively communicated with the corresponding liquid inlet pipeline main pipelines 21; the liquid outlet pipeline assembly 30 includes m liquid outlet pipeline main pipelines 31 sequentially arranged in the first direction X and connected in series, and n liquid cooling monomers 11 in each combined liquid cooling module 10 are respectively communicated with the corresponding liquid outlet pipeline main pipelines 31.
In the liquid cooling system 01 provided by the utility model, because the m liquid inlet pipe main paths 21 are mutually connected in series, and n liquid cooling monomers 11 in each combined liquid cooling module 10 are respectively communicated with the corresponding liquid inlet pipe main paths 21; and because m liquid outlet pipe main ways 31 are connected in series, and n liquid cooling monomers 11 in each combined liquid cooling module 10 are respectively communicated with corresponding liquid outlet pipe main ways 31, each liquid cooling monomer 11 which is arranged in a stacked manner can be connected in parallel through the liquid inlet pipe main way 21 and the liquid outlet pipe main way 31, the principle that the pipelines are connected in parallel with circuits is similar, the flow in the pipelines is equal to the flow in each pipe section which is connected in parallel, and the resistance losses of each pipe section which is connected in parallel are equal, therefore, the resistance of fluid flowing into each liquid cooling monomer 11 can be reduced, the resistance of fluid flowing into each liquid cooling monomer 11 is more balanced, and the problem of large system pressure drop caused by the multi-layer arrangement of the liquid cooling monomers 11 is solved.
Further, the fluid in the liquid cooling system 01 provided by the utility model is a cooling liquid, and the cooling liquid is transmitted to n liquid cooling monomers 11 in the combined liquid cooling module 10 through the liquid inlet pipeline assembly 20 and then is discharged out of the liquid cooling system 01 through the liquid outlet pipeline assembly 30, so that cooling and heat dissipation are realized. Wherein K represents the flow direction of the cooling liquid.
In some embodiments of the present utility model, the combined liquid cooling module 10 has a central axis AA parallel to the first direction X, and the inlet pipe assembly 20 and the outlet pipe assembly 30 use the central axis AA as a symmetry axis.
In the liquid cooling system 01 provided by the utility model, the liquid inlet pipeline assembly 20 and the liquid outlet pipeline assembly 30 take the central axis AA parallel to the first direction X as a symmetry axis, that is, the liquid inlet pipeline assembly 20 and the liquid outlet pipeline assembly 30 are symmetrical about the central axis AA, the arrangement mode of bilateral symmetry can lead the parts of the liquid inlet pipeline assembly 20 and the liquid outlet pipeline assembly 30 to be common, and the structure, the pipeline total length and the structure and the pipeline total length of the liquid inlet pipeline assembly 20 are the same, so that the liquid inlet efficiency of the liquid inlet pipeline assembly 20 and the liquid outlet efficiency of the liquid outlet pipeline assembly 30 can be the same or tend to be the same; and, the flow of the liquid outlet pipeline assembly 30 can be regulated and controlled by directly regulating the flow of the liquid inlet pipeline assembly 20, so that the flow regulating variable is reduced, the flow rates of the cooling liquid in the liquid inlet pipeline assembly 20 and the cooling liquid in the liquid outlet pipeline assembly 30 which are bilaterally symmetrical are the same or tend to be the same, and the circulation efficiency and the heat dissipation stability of the liquid cooling system 01 are improved.
In some embodiments of the present utility model, the inlet manifold assembly 20 further includes m×n inlet manifold branches 22, the liquid-cooled monomer 11 is in communication with the inlet manifold main 21 through the inlet manifold branches 22, wherein n inlet manifold branches 22 in the second direction Y are symmetrical about the inlet manifold main 21; the liquid outlet pipe assembly 30 further includes m×n liquid outlet pipe branches 32, and the liquid cooling monomer 11 is communicated with the liquid outlet pipe main pipe 31 through the liquid outlet pipe branches 32, where n liquid outlet pipe branches 32 in the second direction Y use the liquid outlet pipe main pipe 31 as a symmetry axis.
In the liquid cooling system 01 provided by the utility model, n liquid inlet pipe branches 22 in the second direction Y are symmetrical about the liquid inlet pipe main path 21, n liquid outlet pipe branches 32 in the second direction Y are symmetrical about the liquid outlet pipe main path 31, namely, the n liquid inlet pipe branches 22 in the second direction Y are vertically symmetrical about the liquid inlet pipe main path 21, n liquid outlet pipe branches 32 in the second direction Y are vertically symmetrical about the liquid outlet pipe main path 31, so that the flow rate of n/2 liquid inlet pipe branches 22 positioned above the liquid inlet pipe main path 21 and the flow rate of n/2 liquid inlet pipe branches 22 positioned below the liquid inlet pipe main path 21 can be the same or tend to be the same, the flow rate of the n/2 liquid outlet pipe branches 32 above the liquid outlet pipe main path 31 is the same as the flow rate of the n/2 liquid outlet pipe branches 32 below the liquid outlet pipe main path 31, accordingly, the resistance of the fluid flowing into the n/2 liquid inlet pipe branches 22 above the liquid inlet pipe main path 21 is the same as or tends to be the same as the resistance of the fluid flowing into the n/2 liquid inlet pipe branches 22 below the liquid inlet pipe main path 21, the resistance of the fluid flowing into the n/2 liquid outlet pipe branches 32 above the liquid outlet pipe main path 31 is the same as or tends to be the same as the resistance of the n/2 liquid outlet pipe branches 32 below the liquid outlet pipe main path 31, thereby effectively improving the problem that the up-down flow distribution of the liquid inlet pipe assembly 20 and the liquid outlet pipe assembly 30 is inconsistent, reducing the flow regulating variable, and enabling the flow rates of the cooling liquid in the up-down symmetrical pipes to be the same as or tends to be the same, the heat dissipation efficiency of the liquid cooling monomers 11 positioned at different levels is balanced.
In some embodiments of the present utility model, the inlet line assembly 20 includes a total inlet port 23, the total inlet port 23 being in communication with a first one of the inlet line main lines 21 aligned in the first direction X; the liquid outlet pipeline assembly 30 comprises a total liquid outlet 33, and the total liquid outlet 33 is communicated with a first liquid outlet pipeline main pipeline 31 arranged in the first direction X; the liquid cooling system 01 further includes a cold plate 40, a cold plate liquid inlet pipe 41 and a cold plate liquid outlet pipe 42, wherein the cold plate 40 is disposed at one side of the mth combined liquid cooling module 10 arranged in the first direction X, which is away from the 1 st combined liquid cooling module 10 arranged in the first direction X, and the cold plate liquid inlet pipe 41 is communicated with a liquid inlet pipe main path 21 corresponding to the mth combined liquid cooling module 10; the cold plate liquid outlet pipe 42 is communicated with the liquid outlet pipe main path 31 corresponding to the mth combined liquid cooling module 10.
In the liquid cooling system 01 provided by the utility model, since the cold plate liquid inlet pipe 41 is communicated with the liquid inlet pipe main path 21 corresponding to the mth combined liquid cooling module 10, the cold plate liquid inlet pipe 41 is connected in parallel with the n liquid cooling monomers 11; because the cold plate liquid outlet pipe 42 is communicated with the liquid outlet pipe main path 31 corresponding to the mth combined liquid cooling module 10, the cold plate liquid outlet pipe 42 is connected in parallel with the n liquid cooling monomers 11; so that the cold plate 40 and each liquid cooling unit 11 can be connected in parallel, the principle of parallel connection of pipelines is similar to that of parallel connection of circuits, and the flow rate in the pipelines is equal to that in each pipe section connected in parallel; the resistance losses of the parallel pipe sections are equal, so that the resistance of the cooling liquid flowing into the cold plate 40 can be reduced, the consistency of the resistance of the cooling liquid flowing into the cold plate 40 and the resistance of the fluid flowing into each liquid cooling unit 11 can be improved, and the problem of large pressure drop of the system between the liquid cooling unit 11 and the cold plate 40 can be effectively solved. The cold plate 40 is used for cooling and radiating electric heating components except the battery module.
In some embodiments of the present utility model, m=3, that is, the liquid cooling system 01 includes 3 combined liquid cooling modules 10 sequentially arranged in the first direction X.
Optionally, the inner diameters of the m liquid inlet pipe main paths 21 and the m liquid outlet pipe main paths 31 are the first inner diameter; the inner diameters of the cold plate liquid inlet pipe 41, the cold plate liquid outlet pipe 42, the first liquid inlet pipe branch 22 and the first liquid outlet pipe branch 32 which are arranged in the first direction X are second inner diameters; the inner diameters of the second liquid inlet pipe branch 22 and the third liquid inlet pipe branch 22 which are arranged in the first direction X, and the second liquid outlet pipe branch 32 and the third liquid outlet pipe branch 32 which are arranged in the first direction X are third inner diameters; wherein the first inner diameter is greater than the third inner diameter, which is greater than the second inner diameter.
Specifically, the first inner diameter is 15mm, the second inner diameter is 8mm, and the third inner diameter is 12mm. Since the main liquid inlet pipe passages 21 are connected in series, and the main liquid outlet pipe passages 31 are connected in series, the inner diameters of the main liquid inlet pipe passages 21 and the main liquid outlet pipe passages 31 are uniformly set to be larger than the first inner diameters of the branch liquid inlet pipe passages 22 and the branch liquid outlet pipe passages 32, which is beneficial to improving the consistency of the flow rates of the pipelines; since the inlet pipe branches 22 near the total inlet 23 and the outlet pipe branches 32 near the total outlet 33 tend to obtain more flow, the inner diameters of the inlet pipe branches 22 near the total inlet 23 and the outlet pipe branches 32 near the total outlet 33 need to be set smaller so that the second inner diameters of the first inlet pipe branches 22 and the first outlet pipe branches 32 arranged in the first direction X are smaller than the third inner diameters of the second inlet pipe branches 22 and the second outlet pipe branches 32 arranged in the first direction X, thereby being beneficial to improving the consistency of the flow rates of all pipelines; since m=3 in the present embodiment, that is, the third inlet pipe branch 22 and the third outlet pipe branch 32 arranged in the first direction X are located at the extreme ends of the respective outlet pipe branches 32, and in terms of piping design, the extreme end piping has additional resistance, so that the piping inner diameter thereof needs to be increased, and therefore, the inner diameters of the third inlet pipe branch 22 and the third outlet pipe branch 32 arranged in the first direction X are set to be larger than the third inner diameters of the second inner diameters of the first inlet pipe branch 22 and the first outlet pipe branch 32 arranged in the first direction X, which is beneficial to improving the uniformity of the flow rates of the respective piping.
In some embodiments of the present utility model, n=2, that is, each of the combined liquid cooling modules 10 includes two liquid cooling units 11 stacked in the second direction Y.
Optionally, the liquid inlet pipeline assembly 20 further includes m liquid inlet four-way connectors 24, where the liquid inlet four-way connectors 24 include a first liquid inlet end 241, a first liquid outlet end 242, and two second liquid outlet ends 243, and the first liquid inlet end 241 is connected to the liquid inlet pipeline main path 21; the first liquid inlet end 241 and the first liquid outlet end 242 extend along the first direction X, and the first liquid outlet end 242 is connected to the liquid inlet main path 21 or the cold plate liquid inlet pipe 41; the two second liquid inlet ends take the main liquid inlet pipe path 21 as a symmetrical axis.
Specifically, the first liquid inlet end 241 and the first liquid outlet end 242 of the liquid inlet four-way joint 24 can be communicated with two adjacent liquid inlet main pipes 21 or two adjacent liquid inlet main pipes 21 and the cold plate liquid inlet pipe 41; the two second liquid outlet ends 243 of the liquid inlet four-way joint 24 can connect the upper and lower liquid inlet branches 22 in the second direction Y, and, because the two second liquid outlet ends 243 use the liquid inlet main path 21 as a symmetry axis, the structural designs of the two second liquid outlet ends 243 are the same, so that the included angles between the two second liquid outlet ends 243 and the liquid inlet main path 21 are the same, the flow regulating variable is reduced, and the resistance and the flow velocity of the cooling liquid flowing into the two second liquid outlet ends 243 are the same or tend to be the same, which is beneficial to improving the flow consistency of the liquid cooling monomers 11 with different film layers.
Optionally, the liquid outlet pipe assembly 30 further includes m liquid outlet four-way connectors 34, where the liquid outlet four-way connectors 34 include a third liquid outlet end 341, a third liquid inlet end 342, and two fourth liquid inlet ends 343, and the third liquid outlet end 341 is connected to the liquid outlet pipe main 31; the third liquid outlet 341 and the third liquid inlet 342 extend along the first direction X, and the third liquid inlet 342 is connected to the liquid outlet main 31 or the cold plate liquid outlet 42; the two fourth liquid inlet ends 343 use the liquid outlet main channel 31 as a symmetry axis.
Specifically, the third liquid outlet end 341 and the third liquid inlet end 342 of the liquid outlet four-way joint 34 can be communicated with two adjacent liquid outlet pipe main paths 31 or two adjacent liquid outlet pipe main paths 31 and the cold plate liquid outlet pipe 42; the two fourth liquid inlet ends 343 of the liquid outlet four-way joint 34 can be used for communicating the upper liquid outlet pipe and the lower liquid outlet pipe in the second direction Y through the branch 32, and because the two fourth liquid inlet ends 343 take the liquid outlet pipe main path 31 as a symmetrical axis, the included angles of the two fourth liquid inlet ends 343 and the liquid outlet pipe main path 31 are consistent, the flow regulating variable is reduced, and the flow consistency of the liquid cooling monomers 11 with different film layers is improved.
In some embodiments of the present utility model, the liquid inlet four-way joint 24 is provided with a first throttling device, and the liquid outlet four-way joint 34 is provided with a second throttling device.
Specifically, the first throttling device can regulate the flow of the liquid inlet pipeline assembly 20, and the second throttling device can regulate the flow of the liquid outlet pipeline assembly 30. The first throttling device is arranged on the liquid inlet four-way joint 24, and the second throttling device is arranged on the liquid outlet four-way joint 34, so that the uniformity of flow in the pipelines for entering each liquid cooling monomer 11 and the cold plate 40 and the uniformity of flow in the pipelines for discharging each liquid cooling monomer 11 and the cold plate 40 are improved.
In some embodiments of the present utility model, the liquid-cooled monomer 11 includes: a plurality of serpentine tubes 111, a first corrugated connection assembly 112, and a second corrugated connection assembly 113.
The coiled tubes 111 are used for radiating heat from the electric cells, specifically, each coiled tube 111 can cool two rows of electric cells at the same time, the coiled tubes 111 comprise a first end 1111 and a second end 1112, the first end 1111 is used for inputting cooling liquid, and the second end 1112 is used for outputting cooling liquid.
In the liquid cooling system 01 provided by the utility model, the serpentine tube 111 has a non-flat surface, so that the contact area between the serpentine tube 111 and the battery cell is increased and the heat dissipation efficiency is improved when the liquid cooling system is applied to a battery pack.
The first corrugated connection assembly 112 includes a first liquid inlet 1121, a plurality of first liquid outlets 1122, and a plurality of first corrugated connection pipes 1123 sequentially arranged in the first direction X and connected in series with each other, wherein the first liquid inlet 1121 is communicated with the liquid inlet main path 21, the first liquid outlet 1122 is communicated with the first end 1111 of the serpentine tube 111, and the first corrugated connection pipes 1123 are connected with two adjacent first liquid outlets 1122.
In the liquid cooling system 01 according to the present utility model, since the plurality of first bellows connecting pipes 1123 are connected in series, the first ends 1111 of the serpentine pipes 111 are connected to the first bellows connecting pipes 1123 through the first liquid outlet 1122, so that the first ends 1111 of the serpentine pipes 111 can be connected in parallel, and the heat dissipation uniformity of the liquid cooling unit 11 can be improved.
The second corrugated connection assembly 113 includes a second liquid outlet 1131, a plurality of second liquid inlets 1132, and a plurality of second corrugated connection pipes 1133 sequentially arranged in the first direction X and connected in series with each other, wherein the second liquid outlet 1131 is communicated with the liquid outlet main channel 31, the second liquid inlets 1132 are communicated with the second ends 1112 of the serpentine tubes 111, and the second corrugated connection pipes 1133 connect two adjacent second liquid inlets 1132.
In the liquid cooling system 01 provided by the utility model, since the plurality of second corrugated connection pipes 1133 are connected in series, the second ends 1112 of the serpentine pipes 111 are communicated with the second corrugated connection pipes 1133 through the second liquid inlet 1132, so that the second ends 1112 of the serpentine pipes 111 can be connected in parallel, and the heat dissipation uniformity of the liquid cooling unit 11 can be improved.
In some embodiments of the present utility model, the liquid cooling system 01 further includes a plurality of first quick connectors A1 and a plurality of second quick connectors A2, wherein the first quick connectors A1 are used to communicate the first liquid inlet 1121 of the first corrugated connection assembly 112 with the liquid inlet main channel 21; the second quick connector A2 is configured to communicate the second liquid outlet 1131 of the second corrugated connection assembly 113 with the liquid outlet main 31.
In a second aspect, embodiments of the present utility model provide a battery pack.
Fig. 5 is a perspective view of a battery pack according to an embodiment of the present utility model. Referring to fig. 1-5, the battery pack 100 includes m battery module units 1011 and the liquid cooling system 01 according to any one of the above claims, wherein the liquid cooling system 01 includes m combined liquid cooling modules 10 sequentially arranged in the first direction X, where m is an integer greater than 1, and the combined liquid cooling modules 10 are configured to dissipate heat from the battery module units 1011.
In some embodiments of the present utility model, the battery module unit 1011 includes n battery module units 1011 stacked in a second direction Y, and a tray 1012 disposed between any adjacent two of the liquid cooling units 11, wherein the liquid inlet main path 21 and the liquid outlet main path 31 in the combined liquid cooling module 10 are fixed on the tray 1012, and the second direction Y is perpendicular to the first direction X, and n is an integer greater than 1.
Optionally, the battery module unit 1011 includes a plurality of electric cells arranged in an array, and the electric cells are, for example, cylindrical; structural adhesive is arranged between the liquid cooling monomer 11 and the tray 1012, and the structural adhesive is used for fixing the liquid cooling monomer 11 and the tray 1012.
In summary, the present utility model provides a liquid cooling system and a battery pack, the liquid cooling system includes: the liquid cooling system comprises a plurality of combined liquid cooling modules, a liquid inlet pipeline assembly and a liquid outlet pipeline assembly, wherein the combined liquid cooling modules are sequentially arranged in a first direction, each combined liquid cooling module comprises a plurality of liquid cooling monomers which are stacked in a second direction, and the second direction is perpendicular to the first direction; the liquid inlet pipeline assembly comprises a plurality of liquid inlet pipeline main pipelines which are sequentially arranged in the first direction, the liquid inlet pipeline main pipelines are mutually connected in series, and a plurality of liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid inlet pipeline main pipelines; the liquid outlet pipeline assembly comprises a plurality of liquid outlet pipeline main pipelines which are sequentially arranged in the first direction and are mutually connected in series, and a plurality of liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid outlet pipeline main pipelines. The liquid cooling system provided by the utility model has the advantages of small system pressure drop, less flow regulation variable and high flow regulation consistency.
The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
Claims (10)
1. A liquid cooling system, the liquid cooling system comprising:
the m combined liquid cooling modules are sequentially arranged in a first direction, wherein each combined liquid cooling module comprises n liquid cooling monomers which are stacked in a second direction, and the second direction is perpendicular to the first direction;
the liquid inlet pipeline assembly comprises m liquid inlet pipeline main pipelines which are sequentially arranged in the first direction, the m liquid inlet pipeline main pipelines are mutually connected in series, and n liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid inlet pipeline main pipelines; and
The liquid outlet pipeline assembly comprises m liquid outlet pipeline main pipelines which are sequentially arranged in the first direction, the m liquid outlet pipeline main pipelines are mutually connected in series, and n liquid cooling monomers in each combined liquid cooling module are respectively communicated with the corresponding liquid outlet pipeline main pipelines.
2. The liquid cooling system of claim 1, wherein the combined liquid cooling module has a central axis parallel to the first direction, and the liquid inlet pipe assembly and the liquid outlet pipe assembly are symmetrical about the central axis.
3. The liquid cooling system according to claim 2, wherein,
the liquid cooling monomer is communicated with the liquid inlet pipe main path through the liquid inlet pipe branches, wherein the liquid inlet pipe branches in the second direction take the liquid inlet pipe main path as a symmetry axis;
the liquid outlet pipeline assembly further comprises m x n liquid outlet pipeline branches, and the liquid cooling monomers are communicated with the liquid outlet pipeline main pipeline through the liquid outlet pipeline branches, wherein n liquid outlet pipeline branches in the second direction take the liquid outlet pipeline main pipeline as a symmetry axis.
4. The liquid cooling system according to claim 3, wherein,
the liquid inlet pipeline assembly comprises a total liquid inlet which is communicated with a first liquid inlet pipeline main pipeline arranged in the first direction;
the liquid outlet pipeline assembly comprises a total liquid outlet which is communicated with a first liquid outlet pipeline main pipeline arranged in the first direction;
the liquid cooling system further comprises a cold plate, a cold plate liquid inlet pipe and a cold plate liquid outlet pipe, wherein the cold plate is arranged on one side, away from the 1 st combined liquid cooling module arranged in the first direction, of the m combined liquid cooling module arranged in the first direction, the cold plate liquid inlet pipe is communicated with a liquid inlet pipe main path corresponding to the m combined liquid cooling module, and the cold plate liquid outlet pipe is communicated with a liquid outlet pipe main path corresponding to the m combined liquid cooling module.
5. The liquid cooling system according to claim 4, wherein m=3,
the inner diameters of the m liquid inlet pipe main paths and the m liquid outlet pipe main paths are first inner diameters; the cold plate liquid inlet pipe and the cold plate liquid outlet pipe are connected in parallel, and the inner diameter of the first liquid inlet pipe branch and the inner diameter of the first liquid outlet pipe branch which are arranged in the first direction are the second inner diameter; the inner diameters of the second liquid inlet pipe branch and the third liquid inlet pipe branch which are arranged in the first direction, and the second liquid outlet pipe branch and the third liquid outlet pipe branch which are arranged in the first direction are third inner diameters;
wherein the first inner diameter is greater than the third inner diameter, which is greater than the second inner diameter.
6. The liquid cooling system according to claim 4, wherein n=2,
the liquid inlet pipeline assembly further comprises m liquid inlet four-way connectors, wherein each liquid inlet four-way connector comprises a first liquid inlet end, a first liquid outlet end and two second liquid outlet ends, and the first liquid inlet ends are connected with the liquid inlet pipeline main pipeline;
the first liquid inlet end and the first liquid outlet end extend along the first direction, and the first liquid outlet end is connected with the liquid inlet pipe main path or the cold plate liquid inlet pipe; the two second liquid outlet ends take the main path of the liquid inlet pipe as a symmetry axis;
the liquid outlet pipeline assembly further comprises m liquid outlet four-way connectors, wherein each liquid outlet four-way connector comprises a third liquid outlet end, a third liquid inlet end and two fourth liquid inlet ends, and the third liquid outlet ends are connected with the liquid outlet pipeline main pipeline;
the third liquid outlet end and the third liquid inlet end extend along the first direction, and the third liquid inlet end is connected with the liquid outlet pipe main path or the cold plate liquid outlet pipe; the two fourth liquid inlet ends take the main liquid outlet pipe as symmetry axes.
7. The liquid cooling system according to claim 6, wherein the liquid inlet four-way joint is provided with a first throttling device, and the liquid outlet four-way joint is provided with a second throttling device.
8. The liquid cooling system according to any one of claims 1 to 7, wherein the liquid cooling monomer comprises:
the plurality of serpentine pipes are sequentially arranged in the first direction, each serpentine pipe comprises a first end and a second end, the first end is used for inputting cooling liquid, and the second end is used for outputting the cooling liquid;
the first corrugated connecting assembly comprises a first liquid inlet, a plurality of first liquid outlets and a plurality of first corrugated connecting pipes which are sequentially arranged in the first direction and are mutually connected in series, wherein the first liquid inlet is communicated with the liquid inlet pipe main path, the first liquid outlet is communicated with the first end of the coiled pipe, and the first corrugated connecting pipes are connected with two adjacent first liquid outlets;
the second ripple coupling assembling, including second liquid outlet, a plurality of second inlet and be in a plurality of second ripple connecting pipes of arranging in proper order and establishing ties each other in the first direction, wherein, the second liquid outlet with the drain pipe main way is linked together, the second inlet with the second end of coiled pipe is linked together, two adjacent second inlets are connected to the second ripple connecting pipe.
9. A battery pack, comprising m battery modules and the liquid cooling system according to any one of claims 1 to 8, wherein the liquid cooling system comprises m combined liquid cooling modules sequentially arranged in a first direction.
10. The battery pack according to claim 9, wherein the battery module includes n battery module cells stacked in a second direction and a tray provided between any adjacent two of the liquid-cooled cells, wherein a liquid inlet pipe main passage and a liquid outlet pipe main passage in the combined liquid-cooled module are fixed on the tray, and the second direction is perpendicular to the first direction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024174552A1 (en) * | 2023-02-23 | 2024-08-29 | 惠州亿纬锂能股份有限公司 | Liquid cooling system and battery pack |
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| WO2024174552A1 (en) * | 2023-02-23 | 2024-08-29 | 惠州亿纬锂能股份有限公司 | Liquid cooling system and battery pack |
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