CN221080142U - Liquid cooling device and energy storage system with same - Google Patents

Abstract

The utility model discloses a liquid cooling device and an energy storage system with the same. The liquid cooling device comprises a shell, wherein a medium inlet and a medium outlet are formed in the shell, a first flow channel area and a second flow channel area are formed in the shell, a plurality of first flow channels are formed in the first flow channel area, a plurality of second flow channels are formed in the second flow channel area, the inlets of the plurality of first flow channels are communicated with the medium inlet through a first collecting area, the outlets of the plurality of first flow channels are communicated with the inlets of the plurality of second flow channels through a second collecting area, and the outlets of the plurality of second flow channels are communicated with the medium outlet; in the direction from the medium inlet to the medium outlet, the communication ports of the first collecting region and the plurality of first flow channels are gradually reduced, and/or the communication ports of the second collecting region and the plurality of second flow channels are gradually reduced. According to the liquid cooling device disclosed by the utility model, cooling liquid can enter each first flow passage and each second flow passage as uniformly as possible, so that the influence of gravity on the distribution of the cooling liquid can be reduced, and an air zone is prevented from being formed in the shell.

Description

Liquid cooling device and energy storage system with same

Technical Field

The utility model relates to the technical field of energy storage systems, in particular to a liquid cooling device and an energy storage system with the liquid cooling device.

Background

In the related art, the liquid cooling device is usually used for radiating the battery, the hollow space is arranged in the shell of the liquid cooling device, the medium inlet and the medium outlet which are communicated with the hollow space are arranged on the shell, the medium inlet is positioned above the medium outlet, and the medium inlet is close to the top wall of the hollow space, a certain distance is reserved between the medium inlet and the top wall of the hollow space of the liquid cooling device, therefore, when cooling liquid is introduced into the hollow space of the liquid cooling device, the cooling liquid flows to the bottom wall of the liquid cooling device under the action of gravity and flows out through the medium outlet, but an air area is formed between the medium inlet and the top wall of the hollow space, and air in the air area cannot be discharged through the medium outlet, so that the heat radiation effect of the liquid cooling device on the battery is affected. In addition, the medium inlet of some liquid cooling devices is arranged below the medium outlet, and the air in the internal flow channel is extruded through the cooling liquid so as to avoid the occurrence of an air zone, but the mode can lead the cooling liquid to additionally increase the pressure drop generated by overcoming the gravity besides overcoming the pressure drop generated by friction in the flow channel, thereby leading to the generation of larger pressure drop of the whole system and increasing the energy consumption of the liquid cooling system.

Disclosure of utility model

The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the utility model provides the liquid cooling device which is beneficial to filling the whole internal space of the shell with cooling liquid and avoiding forming an air zone.

The utility model further provides an energy storage system with the liquid cooling device.

The liquid cooling device comprises a shell, wherein a medium inlet and a medium outlet are formed in the shell, a first flow passage area and a second flow passage area are formed in the shell, a plurality of first flow passages are formed in the first flow passage area, a plurality of second flow passages are formed in the second flow passage area, the inlets of the plurality of first flow passages are communicated with the medium inlet through a first flow collecting area, the outlets of the plurality of first flow passages are communicated with the inlets of the plurality of second flow passages through a second flow collecting area, the outlets of the plurality of second flow passages are communicated with the medium outlet, and the medium inlet and the medium outlet are positioned at the same end of the first flow passage area and the second flow passage area; in the direction from the medium inlet to the medium outlet, the communication ports of the first collecting area and the plurality of first flow channels are gradually reduced, and/or the communication ports of the second collecting area and the plurality of second flow channels are gradually reduced.

According to the liquid cooling device provided by the embodiment of the utility model, the communication ports of the first collecting area and the plurality of first flow channels are gradually reduced, and the communication ports of the second collecting area and the plurality of second flow channels are gradually reduced, so that the communication ports of the flow channels positioned above are larger, the difficulty of entering the flow channels by cooling liquid can be ensured to be smaller, the flow rate in each flow channel is uniform as much as possible, the influence of gravity on the distribution of the cooling liquid is reduced or even eliminated, the cooling liquid is beneficial to filling the whole internal space of the shell, and the formation of an air area in the shell is avoided.

According to some embodiments of the utility model, the first flow path includes a first straight line segment and a first arcuate line segment, the first straight line segment extending along a first direction, the first arcuate line segment being connected to the first straight line segment, the first arcuate line segment curving toward the media inlet and communicating with the first collection region, wherein the first direction intersects a line connecting the media inlet and the media outlet.

According to some embodiments of the utility model, the second flow path includes a second straight line segment extending along the first direction and a second arc segment connected to the second straight line segment, the second arc segment curving toward the first flow path region and communicating with the second collecting region.

According to some embodiments of the utility model, an arc-shaped first abutting portion is arranged at one end of the first arc segment, which faces the first current collecting area, the first abutting portion surrounds the first current collecting area, and inlets of the first flow channels are defined by the first abutting portions; and/or the number of the groups of groups,

And one end of the second arc section, which faces the second current collecting area, is provided with an arc-shaped second abutting part, the second abutting part surrounds the second current collecting area, and the inlets of the second flow channels are defined by the second abutting parts.

According to some embodiments of the utility model, the housing comprises a flow channel plate configured as a box-like structure with one side open, and a cover plate adapted to close the opening of the flow channel plate, the flow channel walls of the first flow channel, the flow channel walls of the second flow channel being arranged on the flow channel plate and adapted to be in stop-fit with the inner side surfaces of the cover plate, the first and second collecting areas being defined by the flow channel plate and the cover plate.

According to some embodiments of the utility model, the medium inlet and the medium outlet are provided on the cover plate.

According to some embodiments of the utility model, the housing comprises a first end wall and a second end wall arranged opposite each other and two housing side walls arranged opposite each other, the two housing side walls connecting the first end wall and the second end wall, the medium inlet and the medium outlet being arranged at one end of the housing side walls near the first end wall, the flow passage wall of the first flow passage being separated from the second end wall, the flow passage wall of the second flow passage being separated from the first end wall.

According to some embodiments of the utility model, a partition wall is provided in the housing, the partition wall being connected to the first end wall, the partition wall being separated from the second end wall and being in abutment with the two housing side walls, one side of the partition wall forming the first flow passage region and the other side of the partition wall forming the second flow passage region.

An energy storage system according to another embodiment of the present utility model includes: the battery cells are rectangular and provided with a first side face, a second side face and a third side face which are oppositely arranged, the area of the first side face is larger than that of the second side face, the area of the first side face is larger than that of the third side face, and the first side faces of the battery cells are arranged in parallel; the liquid cooling device is of a plate-shaped structure and is provided with a heat exchange surface, and the heat exchange surface of the liquid cooling device is suitable for contacting and exchanging heat with the first side surface of at least one battery monomer.

According to some embodiments of the utility model, the medium inlet is located above the medium outlet.

According to the energy storage system disclosed by the embodiment of the utility model, the liquid cooling device is provided with the first current collecting area and the second current collecting area, so that each first flow channel can be independently connected with the first current collecting area, each second flow channel can be independently connected with the second current collecting area, cooling liquid can enter each first flow channel and each second flow channel, the communication ports of the first current collecting area and the plurality of first flow channels are gradually reduced, the communication ports of the second current collecting area and the plurality of second flow channels are gradually reduced, the communication ports of the flow channels positioned above are larger, the difficulty of the cooling liquid entering the flow channels can be ensured to be smaller, the flow rate in each flow channel is uniform as much as possible, the influence of gravity on the cooling liquid distribution is reduced or even eliminated, the cooling liquid is beneficial to filling the whole inner space of the shell, and the air area is avoided to be formed in the shell. Therefore, when the liquid cooling device is used for cooling and radiating the battery cells, the cooling and radiating effects are good.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic perspective view of a liquid cooling apparatus according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;

FIG. 3 is a schematic perspective view of a flow field plate;

FIG. 4 is an enlarged partial schematic view at B in FIG. 3;

Fig. 5 is a schematic perspective view of the cover plate;

fig. 6 is a schematic diagram of an energy storage system according to an embodiment of the utility model.

Reference numerals:

The energy storage system 100, the liquid cooling apparatus 10, the casing 1, the flow path plate 11, the cover plate 12, the first end wall 13, the second end wall 14, the casing side wall 15, the partition wall 16, the inlet pipe 2, the outlet pipe 3, the first flow path region 4, the first flow path 41, the first flow path 411, the second first flow path 412, the third first flow path 413, the fourth first flow path 414, the fifth first flow path 415, the first straight line segment 416, the first arc segment 417, the first abutting portion 418, the first collecting region 42, the second flow path region 5, the second flow path 51, the first second flow path 511, the second flow path 512, the third second flow path 513, the fourth second flow path 514, the fifth second flow path 515, the second straight line segment 516, the second arc segment 517, the second abutting portion 518, the second collecting region 52, the battery cell 20, the first side 201, the second side 202, and the third side 203.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

A liquid cooling apparatus 10 and an energy storage system 100 having the liquid cooling apparatus 10 according to an embodiment of the present utility model are described in detail below with reference to fig. 1 to 6.

Referring to fig. 1, 3-4, a liquid cooling device 10 according to an embodiment of the present utility model includes a housing 1, a medium inlet and a medium outlet are provided on the housing 1, a first flow path area 4 and a second flow path area 5 are provided in the housing 1, the medium inlet is communicated with the first flow path area 4, the medium outlet is communicated with the second flow path area 5, the first flow path area 4 is provided with a plurality of first flow paths 41, the second flow path area 5 is provided with a plurality of second flow paths 51, the inlets of the plurality of first flow paths 41 are communicated with the medium inlet through a first collecting area 42, the outlets of the plurality of first flow paths 41 are communicated with the inlets of the plurality of second flow paths 51 through a second collecting area 52, the outlets of the plurality of second flow paths 51 are communicated with the medium outlet, and the medium inlet and the medium outlet are located at the same end of the first flow path area 4 and the second flow path area 5.

The cooling liquid can enter the first collecting region 42 through the medium inlet, flow and buffer in the first collecting region 42 and then enter the plurality of first flow channels 41, the cooling liquid in the first flow channels 41 can further flow into the second collecting region 52, flow and buffer in the second collecting region 52 and then enter the plurality of second flow channels 51, and the cooling liquid in the second flow channels 51 can further flow out of the shell 1 from the medium outlet. By providing the first collecting areas 42, it is ensured that each first flow channel 41 can be individually connected to the first collecting areas 42, so that the cooling liquid can enter into each first flow channel 41. By providing the second collecting areas 52, it is ensured that each second flow channel 51 can be connected to the second collecting areas 52 individually, so that the cooling liquid can enter each second flow channel 51, and the influence of gravity on the distribution of the cooling liquid can be reduced or even eliminated, and the formation of an air area inside the housing 1 is avoided.

In the specific example of fig. 3, the first flow channels 41 are five in the direction from the medium inlet to the medium outlet, the five first flow channels 41 are respectively a first flow channel 411, a second first flow channel 412, a third first flow channel 413, a fourth first flow channel 414 and a fifth first flow channel 415, the inlets of the first flow channel 411, the second first flow channel 412, the third first flow channel 413, the fourth first flow channel 414 and the fifth first flow channel 415 are all in communication with the first collecting region 42, and the outlets of the first flow channel 411, the second first flow channel 412, the third first flow channel 413, the fourth first flow channel 414 and the fifth first flow channel 415 are all in communication with the second collecting region 52. Similarly, the number of the second flow passages 51 is five, the five second flow passages 51 are respectively a first second flow passage 511, a second flow passage 512, a third second flow passage 513, a fourth second flow passage 514 and a fifth second flow passage 515, the inlets of the first second flow passage 511, the second flow passage 512, the third second flow passage 513, the fourth second flow passage 514 and the fifth second flow passage 515 are all communicated with the second collecting region 52, and the outlets of the first second flow passage 511, the second flow passage 512, the third second flow passage 513, the fourth second flow passage 514 and the fifth second flow passage 515 are all communicated with the medium outlet.

Of course, in other embodiments, the number of first flow channels 41 is not limited to five, but may be other numbers. Likewise, the number of the second flow passages 51 is not limited to five, but may be other numbers. The number of first flow passages 41 and the number of second flow passages 51 may be the same or different.

Referring to fig. 3 to 4, the end edges of the flow channel walls F1 of the plurality of first flow channels 41 participate in forming the outer edges of the first collecting region 42, the end edges of the flow channel walls F2 of the plurality of second flow channels 51 participate in forming the outer edges of the second collecting region 52, at least a portion of the outer edges of the first collecting region 42 and the second collecting region 52 are arc-shaped, and the arc-shaped outer edges can buffer the impact of the cooling liquid on the outer edges of the collecting regions, so that the flow rate of the cooling liquid in the collecting regions is more gentle. The arcuate outer edges may be first and second abutments 418 and 518, which are mentioned later.

The area size of the first and second collecting areas 42 and 52 is related to the design flow rate and the size of the medium inlet, but the utility model is not limited to this relationship, alternatively, half a minute can fill the first collecting area 42 with liquid when the cooling liquid is fed to the medium inlet.

Referring to fig. 1-2 and 5-6, an inlet pipe 2 is arranged at the medium inlet, so that the liquid inlet equipment can be conveniently connected; an outlet pipe 3 is arranged at the medium outlet, so that the liquid outlet equipment can be conveniently connected.

According to the liquid cooling device 10 of the embodiment of the utility model, by arranging the first collecting region 42 and the second collecting region 52, each first flow channel 41 can be ensured to be connected with the first collecting region 42 independently, each second flow channel 51 can be connected with the second collecting region 52 independently, so that cooling liquid can enter each first flow channel 41 and each second flow channel 51, influence of gravity on cooling liquid distribution can be reduced or even eliminated, the cooling liquid is beneficial to filling the whole internal space of the shell 1, and the formation of an air zone inside the shell 1 is avoided. Thus, when the liquid cooling device 10 is used to cool and dissipate heat from other devices (for example, the battery cells 20), the cooling and heat dissipation effects are good.

In some embodiments of the present utility model, as shown with reference to fig. 3 to 4, in the direction from the medium inlet to the medium outlet, i.e., in the direction from F3 to F4, the communication ports of the first collecting region 42 with the plurality of first flow channels 41 are gradually reduced, and/or the communication ports of the second collecting region 52 with the plurality of second flow channels 51 are gradually reduced, whereby flow distribution can be optimized.

Alternatively, in some embodiments, only the communication ports of the first collecting region 42 with the plurality of first flow channels 41 are gradually reduced.

In other embodiments, only the communication ports between the second collecting region 52 and the plurality of second flow channels 51 are gradually reduced.

In still other embodiments, the communication ports of the first collecting region 42 with the plurality of first flow channels 41 are gradually reduced, and the communication ports of the second collecting region 52 with the plurality of second flow channels 51 are gradually reduced. For convenience of description, the flow path structure in the liquid cooling apparatus 10 will be described by taking this as an example.

The influence of gravity on the cooling liquid is considered, the size of the communication ports of each flow channel and the corresponding flow collecting area is unevenly processed, namely, the communication ports of the first flow collecting area 42 and the different first flow channels 41 are sequentially reduced from top to bottom, and the communication ports of the second flow collecting area 52 and the different second flow channels 51 are sequentially reduced, so that the difficulty of the cooling liquid entering the flow channels can be ensured to be smaller due to the fact that the communication ports are larger in the flow channels positioned above, and the flow rate in each flow channel is as uniform as possible.

In the specific example of fig. 3, the communication ports of the first flow channel 411 and the first current collecting region 42, the second first flow channel 412 and the first current collecting region 42, the third first flow channel 413 and the first current collecting region 42, the fourth first flow channel 414 and the first current collecting region 42, and the fifth first flow channel 415 and the first current collecting region 42 are gradually reduced, so that it is beneficial to ensure that the flow rates in the first flow channel 411, the second first flow channel 412, the third first flow channel 413, the fourth first flow channel 414 and the fifth first flow channel 415 are uniform. Similarly, the communication port between the first second flow channel 511 and the second current collecting region 52, the communication port between the second flow channel 512 and the second current collecting region 52, the communication port between the third second flow channel 513 and the second current collecting region 52, the communication port between the fourth second flow channel 514 and the second current collecting region 52, and the communication port between the fifth second flow channel 515 and the second current collecting region 52 are gradually reduced, thereby being beneficial to ensuring that the flow rates in the first second flow channel 511, the second flow channel 512, the third second flow channel 513, the fourth second flow channel 514 and the fifth second flow channel 515 are uniform.

According to the liquid cooling device 10 of the embodiment of the utility model, the communication ports between the first collecting area 42 and the plurality of first flow channels 41 are gradually reduced, and the communication ports between the second collecting area 52 and the plurality of second flow channels 51 are gradually reduced, so that the communication ports of the flow channels positioned above are larger, the difficulty of entering the cooling liquid into the flow channels is ensured to be smaller, the flow rate in each flow channel is as uniform as possible, the influence of gravity on the distribution of the cooling liquid is reduced or even eliminated, the cooling liquid is beneficial to filling the whole inner space of the shell 1, and the formation of an air area in the shell 1 is avoided. Thus, when the liquid cooling device 10 is used to cool and dissipate heat from other devices (for example, the battery cells 20), the cooling and heat dissipation effects are good.

In some embodiments of the present utility model, as shown with reference to fig. 3-4, the first flow path 41 includes a first straight line segment 416 and a first arc segment 417, the first straight line segment 416 extending in a first direction, thereby providing less resistance to the flow of the cooling fluid within the first straight line segment 416. The first arc segment 417 is connected to the first straight segment 416, the first arc segment 417 is curved toward the media inlet, and the first arc segment 417 is in communication with the first collecting zone 42. The first arc segment 417 is capable of diverting the coolant at the first collector region 42 into the first straight segment 416. The first arc segment 417 is configured in an arc shape, so that the flow rate of the cooling liquid at the connection position of the first arc segment 417 and the first collecting region 42 can be reduced, and the situation that the cooling liquid flows too fast to fully enter each first flow channel 41 is avoided. That is, the first flow channel 41 includes the first straight line segment 416 and the first curved line segment 417, so that the coolant in the first collecting region 42 can be ensured to smoothly enter the first flow channel 41 without excessively affecting the flow rate of the coolant in the first flow channel 41.

Alternatively, the first straight line sections 416 of the plurality of first flow passages 41 are arranged in parallel, so that the first flow passage 41 is simple in structure and turbulence of the first flow passage area 4 can be reduced.

It should be noted that the first direction intersects the line connecting the medium inlet and the medium outlet. In other words, the center of the medium inlet and the center of the medium outlet form an inlet-outlet connection line, and the first direction intersects the inlet-outlet connection line. Alternatively, the first direction may be perpendicular to the inlet-outlet connection line, or may form a non-right angle with the inlet-outlet connection line. The first direction is the direction F1-F2 in the figures 1 and 3, the inlet-outlet connecting line is the direction F3-F4, and the first direction is perpendicular to the inlet-outlet connecting line.

In some embodiments of the present utility model, referring to fig. 3, the second flow passage 51 includes a second straight line segment 516 and a second arc segment 517, the second straight line segment 516 being arranged to extend in the first direction, thereby making the cooling liquid less resistant to flow within the second straight line segment 516. The second arc segment 517 is connected to the second straight segment 516, the second arc segment 517 is curved toward the first flow path region 4, and the second arc segment 517 is communicated with the second collecting region 52. The second arc segment 517 is capable of diverting the coolant at the second collection region 52 into the second straight segment 516. The second arc segment 517 is configured as an arc shape, so that the flow rate of the cooling liquid at the connection position of the second arc segment 517 and the second collecting region 52 can be reduced, and the situation that the cooling liquid flows too fast to fully enter each second flow passage 51 is avoided. That is, the second flow channel 51 includes the second straight line segment 516 and the second arc segment 517, so that the coolant in the second collecting region 52 can be ensured to smoothly enter the second flow channel 51, and the flow rate of the coolant in the second flow channel 51 is not excessively affected.

Optionally, the second straight line segments 516 of the plurality of second flow channels 51 are disposed in parallel, so that the second flow channels 51 have a simple structure and can reduce turbulence in the second flow channel region 5.

In some embodiments of the present utility model, referring to fig. 3-4, an end of the first arc segment 417 facing the first collecting region 42 is provided with an arc-shaped first abutting portion 418, and the first abutting portion 418 surrounds the first collecting region 42, that is, the curvature center of the first abutting portion 418 is located on the side of the first collecting region 42, not on the side of the first flow channel 41. The inlets of the plurality of first flow channels 41 are defined by the first abutment 418 such that the inlet size of each first flow channel 41 is smaller than the channel width of the first flow channel 41. In this way, firstly, the cooling liquid enters the first collecting area 42 through the medium inlet, does not directly flow into the first flow channels 41, but is blocked by the first abutting portion 418, stays in the first collecting area 42 for a small period of time, then enters the corresponding first flow channels 41 from different inlets at the same time point, and further enters each first flow channel 41 synchronously. Secondly, can increase the area of contact of coolant liquid with casing 1, be favorable to promoting heat exchange efficiency.

In some embodiments of the present utility model, referring to fig. 3-5, an end of the second arc segment 517 facing the second current collecting region 52 is provided with an arc-shaped second abutting portion 518, and the second abutting portion 518 surrounds the second current collecting region 52, that is, a curvature center of the second abutting portion 518 is located on a side of the second current collecting region 52, not on a side of the second flow channel 51. The inlets of the plurality of second flow channels 51 are defined by the second abutment 518 such that the inlet size of each second flow channel 51 is smaller than the channel width of the second flow channel 51. In this way, the cooling liquid does not flow directly into the second flow channels 51 after entering the second flow collecting area 52, but is blocked by the second abutting portion 518, stays in the second flow collecting area 52 for a minute period of time, then enters the corresponding second flow channels 51 from different inlets at the same time point, and further the actions of entering each second flow channel 51 are synchronized. Secondly, can increase the area of contact of coolant liquid with casing 1, be favorable to promoting heat exchange efficiency.

In some embodiments of the present utility model, referring to fig. 1-3 and 5, the housing 1 may include a flow channel plate 11 and a cover plate 12, the flow channel plate 11 is configured as a box structure with one side open, the cover plate 12 is adapted to cover the opening of the flow channel plate 11, the flow channel wall of the first flow channel 41 and the flow channel wall of the second flow channel 51 are disposed on the flow channel plate 11, and the flow channel wall of the first flow channel 41 and the flow channel wall of the second flow channel 51 are further adapted to be in abutting engagement with the inner side surface of the cover plate 12, so that the flow channel wall of the first flow channel 41 encloses the first flow channel 41 with the flow channel plate 11 and the cover plate 12, the flow channel wall of the second flow channel 51 encloses the second flow channel 51 with the flow channel plate 11 and the cover plate 12, and the first collecting area 42 and the second collecting area 52 are defined by the flow channel plate 11 and the cover plate 12.

In some embodiments of the present utility model, as shown with reference to fig. 1-2 and 5, the media inlet and media outlet are provided on the cover plate 12. In this way, the inlet pipe 2 and the outlet pipe 3 may both be located on the side of the cover plate 12 facing away from the flow field plate 11, facilitating the connection of the liquid inlet device and the liquid outlet device on the same side of the housing 1.

In some embodiments not shown in the drawings, the medium inlet and the medium outlet may also be provided on the flow field plate 11. In this way, the inlet pipe 2 and the outlet pipe 3 can be both positioned on the side of the flow channel plate 11 facing away from the cover plate 12, so that the liquid inlet device and the liquid outlet device can be connected on the same side of the housing 1.

In other embodiments not shown in the drawings, the medium inlet is provided on the flow channel plate 11 and the medium outlet is provided on the cover plate 12; or the medium inlet is arranged on the cover plate 12, and the medium outlet is arranged on the runner plate 11.

In some embodiments of the utility model, referring to fig. 1 and 3-4, the housing 1 includes a first end wall 13 and a second end wall 14, and two opposite housing side walls 15, the first end wall 13 and the second end wall 14 are opposite, the two housing side walls 15 connect the first end wall 13 and the second end wall 14, the medium inlet and the medium outlet are disposed at one end of the housing side walls 15 near the first end wall 13, in the example of fig. 1 and 3, the first end wall 13 is disposed at the F1 end, the second end wall 14 is disposed at the F2 end, and the medium inlet and the medium outlet are disposed at the F1 end of the housing side walls 15, thereby facilitating connection of the liquid inlet device and the liquid outlet device at the same end, which is easy to manage.

The flow channel walls of the first flow channel 41 are separated from the second end wall 14, thereby facilitating the passage of the cooling fluid within the first flow channel 41 from the outlet of the first flow channel 41 into the second collection region 52; the flow passage wall of the second flow passage 51 is separated from the first end wall 13, thereby facilitating the cooling liquid in the second flow passage 51 to enter the buffer zone between the flow passage wall of the second flow passage 51 and the first end wall 13 from the outlet of the second flow passage 51, and further facilitating the cooling liquid in the buffer zone to flow out of the housing 1 through the medium outlet.

In some embodiments of the utility model, referring to fig. 3, a partition wall 16 is provided in the housing 1, the partition wall 16 is connected to the first end wall 13, the partition wall 16 is separated from the second end wall 14, the partition wall 16 abuts against the two housing side walls 15, one side of the partition wall 16 forms the first flow passage area 4, and the other side of the partition wall 16 forms the second flow passage area 5. Alternatively, the partition wall 16 may participate in the flow passage walls constituting the fifth first flow passage 415 and the first second flow passage 511. Of course, the partition wall 16 may not participate in the formation of the flow path.

The energy storage system 100 according to another embodiment of the present utility model is formed as a battery pack, specifically, referring to fig. 6, the energy storage system 100 may include a plurality of battery cells 20 and the liquid cooling device 10 of the foregoing embodiment, the battery cells 20 are rectangular, and the battery cells 20 have oppositely disposed first side surfaces 201, oppositely disposed second side surfaces 202 and oppositely disposed third side surfaces 203, the area of the first side surfaces 201 is larger than the area of the second side surfaces 202 and the area of the first side surfaces 201 is larger than the area of the third side surfaces 203, that is, the first side surfaces 201 are large surfaces of the battery cells 20, and the first side surfaces 201 of the plurality of battery cells 20 are arranged in parallel. The liquid cooling device 10 has a plate-like structure, that is, the liquid cooling device 10 is configured as a liquid cooling plate, the liquid cooling device 10 has a heat exchange surface, and the heat exchange surface of the liquid cooling device 10 is suitable for contacting and exchanging heat with the first side surface 201 of at least one battery cell 20. That is, the heat exchange surface of the liquid cooling device 10 contacts the maximum side of the battery cell 20 for heat exchange, so that the heat exchange area is larger, which is beneficial to improving the heat exchange efficiency.

In the specific example of fig. 6, the number of the battery cells 20 is four, and two battery cells 20 are disposed side by side on each side of the liquid cooling device 10, so that the liquid cooling device 10 can exchange heat with four battery cells 20 at the same time. By changing the size of the liquid cooling device 10 or the size of the battery cells 20, heat dissipation to different numbers of battery cells 20 can be achieved.

Of course, according to actual needs, the second side 202 or the third side 203 of the battery cell 20 may be in contact with the liquid cooling device 10 to exchange heat.

Alternatively, the liquid cooling device 10 may be used to dissipate heat from other heat generating components.

Note that the liquid cooling device 10 can be used not only for radiating heat from other components, but also for heating other components after the cooling liquid in the liquid cooling device 10 is replaced with a high-temperature liquid. For example, in a severe cold condition, other components may be halted at a low temperature or the performance may be reduced, and the components may be operated in a suitable temperature range by heating them using the high temperature liquid cooling apparatus 10.

According to the energy storage system 100 of the embodiment of the utility model, the liquid cooling device 10 is provided with the first collecting area 42 and the second collecting area 52, so that the cooling liquid can enter each first flow channel 41 and each second flow channel 51, the communication ports of the first collecting area 42 and the first flow channels 41 are gradually reduced, the communication ports of the second collecting area 52 and the second flow channels 51 are gradually reduced, the communication ports of the flow channels positioned above are larger, the difficulty of the cooling liquid entering the flow channels can be ensured to be smaller, the flow rate in each flow channel is uniform as much as possible, the influence of gravity on the distribution of the cooling liquid is reduced or even eliminated, the cooling liquid is beneficial to filling the whole inner space of the shell 1, and the formation of an air area in the shell 1 is avoided. Thus, when the liquid cooling device 10 is used to cool and dissipate heat from the battery cells 20, the cooling and heat dissipation effects are good.

In some embodiments of the present utility model, referring to fig. 1 and 5-6, the medium inlet is located above the medium outlet, and the cooling liquid can flow downward from above, so that unnecessary pressure loss can be avoided, and the pressure requirement of the energy storage system 100 is reduced. The cooling liquid enters the first collecting region 42 from the medium inlet at the upper part, then enters the first flow channel 41 through the first collecting region 42, then enters the second flow channel 52 through the first flow channel 41, then enters the second flow channel 51 through the second flow channel 52, then reaches the medium outlet at the lower part through the second flow channel 51, and flows out of the shell 1 from the medium outlet, in the process, the liquid cooling device 10 can take away the redundant heat of the battery monomer 20 so as to realize heat dissipation of the battery monomer 20, the battery monomer 20 is in a proper temperature range, the overheat damage of the battery monomer 20 is avoided, and the service life of the battery monomer 20 is prolonged.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. The liquid cooling device is characterized by comprising a shell (1), wherein a medium inlet and a medium outlet are formed in the shell (1), a first flow passage area (4) and a second flow passage area (5) are formed in the shell (1), a plurality of first flow passages (41) are formed in the first flow passage area (4), a plurality of second flow passages (51) are formed in the second flow passage area (5), the inlets of the plurality of first flow passages (41) are communicated with the medium inlet through a first collecting area (42), the outlets of the plurality of first flow passages (41) are communicated with the inlets of the plurality of second flow passages (51) through a second collecting area (52), the outlets of the plurality of second flow passages (51) are communicated with the medium outlet, and the medium inlet and the medium outlet are positioned at the same end of the first flow passage area (4) and the second flow passage area (5);

In a direction from the medium inlet to the medium outlet, the communication ports of the first collecting region (42) and the plurality of first flow passages (41) are gradually reduced, and/or the communication ports of the second collecting region (52) and the plurality of second flow passages (51) are gradually reduced.

2. The liquid cooling device according to claim 1, wherein the first flow channel (41) includes a first straight line segment (416) and a first arc segment (417), the first straight line segment (416) is arranged to extend along a first direction, the first arc segment (417) is connected to the first straight line segment (416), and the first arc segment (417) is bent toward the medium inlet and is in communication with the first collecting region (42), wherein the first direction intersects a connection line between the medium inlet and the medium outlet.

3. The liquid cooling device according to claim 2, wherein the second flow channel (51) includes a second straight line segment (516) and a second arc segment (517), the second straight line segment (516) being arranged extending along the first direction, the second arc segment (517) being connected to the second straight line segment (516), the second arc segment (517) being curved toward the first flow channel region (4) and communicating with the second collecting region (52).

4. A liquid cooling device according to claim 3, wherein an end of the first arc segment (417) facing the first collecting region (42) is provided with an arc-shaped first abutting portion (418), the first abutting portion (418) surrounds the first collecting region (42), and inlets of the plurality of first flow passages (41) are defined by the first abutting portion (418); and/or the number of the groups of groups,

An arc-shaped second abutting portion (518) is arranged at one end, facing the second current collecting region (52), of the second arc-shaped line segment (517), the second abutting portion (518) surrounds the second current collecting region (52), and inlets of the plurality of second flow passages (51) are defined by the second abutting portion (518).

5. The liquid cooling device according to claim 1, wherein the housing (1) comprises a flow channel plate (11) and a cover plate (12), the flow channel plate (11) is configured as a box-shaped structure with one side open, the cover plate (12) is adapted to cover the opening of the flow channel plate (11), the flow channel walls of the first flow channel (41) and the flow channel walls of the second flow channel (51) are arranged on the flow channel plate (11) and are adapted to be in stop fit with the inner side surface of the cover plate (12), and the first collecting region (42) and the second collecting region (52) are defined by the flow channel plate (11) and the cover plate (12).

6. The liquid cooling apparatus according to claim 5, wherein the medium inlet and the medium outlet are provided on the cover plate (12).

7. The liquid cooling device according to claim 1, wherein the housing (1) comprises a first end wall (13) and a second end wall (14) which are arranged opposite each other, and two housing side walls (15) which are arranged opposite each other, the two housing side walls (15) connecting the first end wall (13) and the second end wall (14), the medium inlet and the medium outlet being arranged at one end of the housing side walls (15) close to the first end wall (13), the flow passage wall of the first flow passage (41) being separated from the second end wall (14), the flow passage wall of the second flow passage (51) being separated from the first end wall (13).

8. The liquid cooling device according to claim 7, wherein a partition wall (16) is provided in the housing (1), the partition wall (16) is connected to the first end wall (13), the partition wall (16) is separated from the second end wall (14), the partition wall (16) is abutted against the two housing side walls (15), one side of the partition wall (16) forms the first flow passage area (4), and the other side of the partition wall (16) forms the second flow passage area (5).

9. An energy storage system, comprising:

a plurality of battery cells (20), the battery cells (20) being rectangular and having oppositely disposed first sides (201), oppositely disposed second sides (202), and oppositely disposed third sides (203), the first sides (201) having an area greater than an area of the second sides (202) and the first sides (201) having an area greater than an area of the third sides (203), the first sides (201) of the plurality of battery cells (20) being arranged in parallel;

The liquid cooling device according to any one of claims 1-8, which is plate-like in structure and has a heat exchanging surface adapted to be in contact with the first side (201) of at least one of the battery cells (20) for heat exchange.

10. The energy storage system of claim 9, wherein the medium inlet is located above the medium outlet.