CN218783100U - Liquid cooling system and battery pack - Google Patents

Abstract

The utility model belongs to the technical field of the battery, specifically disclose a liquid cooling system, including liquid inlet pipe way, liquid outlet pipe way and a plurality of liquid cooling plate subassembly, every liquid cooling plate subassembly corresponds a battery module setting respectively, and the entrance point setting of a plurality of liquid cooling plate subassemblies is in same one side, and the exit end setting of a plurality of liquid cooling plate subassemblies is in same one side to form a plurality of parallelly connected coolant liquid circulation passageways between liquid inlet pipe way, a plurality of liquid cooling plate subassemblies and drain pipe, the circulation has the coolant liquid in the coolant liquid circulation passageway. The utility model provides a liquid cooling system adopts the homonymy to get into, and the technical scheme that the homonymy flows out, and the coolant liquid is less at circulation in-process resistance, is favorable to making the coolant liquid flow in the liquid cooling plate subassembly that every battery module corresponds more even, and then guarantees that the temperature uniformity between the electric core in each battery module is better, and the cooling is respond well. The utility model also provides a battery package, including foretell liquid cooling system.

Description

Liquid cooling system and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a liquid cooling system and battery package.

Background

Along with the development trend of pure electric vehicles, the requirement of terminal customers on endurance mileage is gradually increased, so that the energy density of the battery cell is increased. Under limited space in the battery package, the space of liquid cooling system is arranged and the flow distribution of the cooling liquid in each module area is difficult to control, causes the temperature uniformity between electric cores in the adjacent battery module to be difficult to guarantee, especially at low temperature or under the high temperature environment battery fill fast, fill the in-process slowly, temperature uniformity between electric cores is relatively poor, and the cooling effect is not good, influences its life-span of using greatly.

Therefore, a liquid cooling system and a battery pack are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid cooling system and battery package, this liquid cooling system's coolant liquid flow distribution is even, can carry out even cooling to each battery module respectively, and the temperature uniformity between the electric core in each battery module is better, and it is respond well to cool down.

To achieve the purpose, the utility model adopts the following technical proposal:

in one aspect, the utility model provides a liquid cooling system, this liquid cooling system includes:

the first end of the liquid inlet pipeline is provided with a water inlet;

the first end of the liquid outlet pipeline is provided with a water outlet;

the inlet end of the liquid cooling plate assembly is arranged on the same side, the inlet end of the liquid cooling plate assembly is communicated with the second end of the liquid inlet pipeline, the outlet end of the liquid cooling plate assembly is arranged on the same side, and the outlet end of the liquid cooling plate assembly is communicated with the second end of the liquid outlet pipeline.

Optionally, the liquid inlet pipeline is communicated with a main water inlet pipeline, the main water inlet pipeline is communicated with a plurality of branch water inlet pipelines, and each branch water inlet pipeline is communicated with an inlet end of one liquid cooling plate assembly.

Optionally, the flow areas of the plurality of branch water inlet pipelines are sequentially increased along the direction away from the water inlet on the liquid inlet pipeline.

Optionally, the liquid outlet pipe is communicated with a main water outlet pipe, the main water outlet pipe is communicated with a plurality of water outlet pipes, and each water outlet pipe is communicated with one outlet end of the liquid cooling plate assembly.

Optionally, the main water inlet pipeline is communicated with the branch water inlet pipeline and/or the main water outlet pipeline is communicated with the water outlet pipeline through a three-way valve.

Optionally, the three-way valve includes a first port, a second port, and a third port that are communicated with each other, a flow area of the first port is equal to a flow area of the second port, and a flow area of the third port is smaller than the flow area of the first port and the flow area of the second port.

Optionally, a first corrugated pipe section is arranged on the branch water inlet pipeline, and a second corrugated pipe section is arranged on the branch water inlet pipeline.

Optionally, every the liquid cooling plate subassembly corresponds a set of intake pipe and the setting of expenditure water pipeline, every the liquid cooling plate subassembly all includes a plurality of snakelike liquid cooling boards, one of them the both ends of snakelike liquid cooling board respectively with an intake pipe with the intercommunication of expenditure water pipeline, all the other through connecting line rather than the intercommunication between the snakelike liquid cooling board.

Optionally, a third bellows section is provided on the connection pipeline.

On the other hand, the utility model provides a battery pack, including a plurality of battery module to and the liquid cooling system in the above-mentioned arbitrary scheme, the liquid cooling system is respectively to each the battery module carries out cooling.

The beneficial effects of the utility model are that:

the utility model provides a liquid cooling system, this liquid cooling system includes the liquid inlet pipe way, liquid outlet pipe way and a plurality of liquid cooling board subassembly, every liquid cooling board subassembly corresponds a battery module setting respectively, thereby carry out cooling to the electric core in each battery module, the entrance point setting of a plurality of liquid cooling board subassemblies is in same one side, and the entrance point of a plurality of liquid cooling board subassemblies all communicates with the liquid inlet pipe way, the exit end setting of a plurality of liquid cooling board subassemblies is in same one side, and the exit end of a plurality of liquid cooling board subassemblies all communicates with the liquid outlet pipe way, thereby at the liquid inlet pipe way, form a plurality of parallelly connected coolant liquid circulation passageways between a plurality of liquid cooling board subassemblies and the liquid outlet pipe way, the circulation has the coolant liquid in the coolant liquid circulation passageway. The utility model provides a liquid cooling system adopts the homonymy to get into, and the technical scheme that the homonymy flows out, and the coolant liquid is less at circulation in-process resistance, is favorable to making the coolant liquid flow in the liquid cooling plate subassembly that every battery module corresponds more even, and then guarantees that the temperature uniformity between the electric core in each battery module is better, and the cooling is respond well, is favorable to prolonging the life of electric core.

The utility model also provides a battery pack, including a plurality of battery modules to and above-mentioned liquid cooling system, each liquid cooling board subassembly through the liquid cooling system can cool off a battery module respectively, and electric core in each battery module all can obtain effectual cooling, and the cooling is effectual, and the coolant liquid flow in the liquid cooling board subassembly that every battery module corresponds is even, and the temperature uniformity between the electric core in each battery module is better, is favorable to prolonging the life of electric core.

Drawings

Fig. 1 is a schematic structural diagram of a liquid cooling system provided in an embodiment of the present invention;

fig. 2 is a top view of a liquid cooling system provided in an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

fig. 5 is a partial enlarged view of the main water inlet pipeline, the three-way valve and the branch water inlet pipeline provided in the embodiment of the present invention.

In the figure:

100. a liquid inlet pipeline; 101. a water inlet;

200. a liquid cooling plate assembly; 210. a main water inlet pipeline; 211. a first water inlet pipeline; 212. a second water inlet pipeline; 2121. a first bellows section; 213. a third water inlet pipeline; 214. a fourth water inlet pipeline; 220. a main water outlet pipeline; 221. a first water outlet pipeline; 222. a second water discharge line; 2221. a second bellows section; 223. a third water discharge line; 224. a fourth water discharge line; 230. a serpentine liquid cooled panel; 240. connecting a pipeline; 2401. a third bellows section;

300. a liquid outlet pipeline; 301. a water outlet;

400. a three-way valve; 401. a first interface; 402. a second interface; 403. and a third interface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and fig. 2, this embodiment provides a liquid cooling system, which includes a liquid inlet pipe 100, a liquid outlet pipe 300 and a plurality of liquid cooling board assemblies 200, each of the liquid cooling board assemblies 200 is respectively disposed corresponding to a battery module, thereby cooling down the electric core in each battery module, wherein the first end of the liquid inlet pipe 100 is provided with a water inlet 101, the first end of the liquid outlet pipe 300 is provided with a water outlet 301, the inlet ends of the plurality of liquid cooling board assemblies 200 are disposed at the same side, the inlet ends of the plurality of liquid cooling board assemblies 200 are all communicated with the second end of the liquid inlet pipe 100, the outlet ends of the plurality of liquid cooling board assemblies 200 are all communicated with the second end of the liquid outlet pipe 300, thereby forming a plurality of parallel cooling liquid circulation channels between the liquid inlet pipe 100, the plurality of liquid cooling board assemblies 200 and the liquid outlet pipe 300, cooling liquid flows through the cooling channels, the cooling liquid enters from the water inlet 101 on the liquid inlet pipe 100, and then enters into different liquid cooling board assemblies 200, and then flows out of the liquid cooling board assemblies from the liquid cooling board assemblies 200 in the liquid outlet pipe 300, and then converge together from the liquid outlet pipe 300.

Compare in the scheme that water inlet pipe and outlet pipe way in single module adopted the diagonal angle business turn over in the past, adopt the homonymy to get into in this embodiment, the technical scheme of homonymy outflow, the coolant liquid is less at circulation in-process resistance, be favorable to making the coolant liquid flow in the liquid cooling board subassembly 200 that every battery module corresponds more even, and then guarantee that the temperature uniformity between the electric core in each battery module is better, the cooling is effectual, is favorable to prolonging the life of electric core. And the liquid cooling system has compact structure, reasonable arrangement, small occupied space and universality among various parts and accessories.

Referring to fig. 2 to 4, in the embodiment, the liquid inlet pipeline 100 is connected to the main water inlet pipeline 210, the main water inlet pipeline 210 is connected to a plurality of branch water inlet pipelines, each branch water inlet pipeline is connected to an inlet end of one liquid cooling plate assembly 200, the liquid outlet pipeline 300 is connected to the main water outlet pipeline 220, the main water outlet pipeline 220 is connected to a plurality of water outlet pipelines, each water outlet pipeline is connected to an outlet end of one liquid cooling plate assembly 200, and the number of the water outlet pipelines is the same as that of the branch water inlet pipelines, so that the cooling liquid can flow into the main water inlet pipeline 210 from the water inlet 101 of the liquid inlet pipeline 100, then respectively flow into different liquid cooling plate assemblies 200 through the branch water inlet pipelines, flow out of the liquid cooling plate assemblies 200, then flow into the main water outlet pipeline 220 through the water outlet 301 of the liquid outlet pipeline 300.

In this embodiment, four branch water inlet pipelines, four liquid cooling plate assemblies 200 and four water outlet pipelines are taken as an example for description, two ends of each liquid cooling plate assembly 200 are respectively communicated with one branch water inlet pipeline and one water outlet pipeline, the four liquid cooling plate assemblies 200 are connected in parallel, and the four liquid cooling plate assemblies 200 respectively cool multiple rows of battery cells in one battery module.

For convenience of description, along a direction away from the inlet 101 of the inlet 100, the four branch inlet pipes are sequentially denoted as a first branch inlet pipe 211, a second branch inlet pipe 212, a third branch inlet pipe 213 and a fourth branch inlet pipe 214, and accordingly, the branched water pipe connected to the first branch inlet pipe 211 is denoted as a first branch outlet pipe 221, the branched water pipe connected to the second branch inlet pipe 212 is denoted as a second branched water pipe 222, the branched water pipe connected to the third branch inlet pipe 213 is denoted as a third branched water pipe 223, and the branched water pipe connected to the fourth branch inlet pipe 214 is denoted as a fourth branched water pipe 224. The coolant flowing in from the water inlet 101 of the liquid inlet pipeline 100 enters the first branch water inlet pipeline 211, the second branch water inlet pipeline 212, the third branch water inlet pipeline 213 and the fourth branch water inlet pipeline 214 through the main water inlet pipeline 210, then enters the four corresponding liquid cooling plate assemblies 200, flows out from the first branch water outlet pipeline 221, the second water outlet pipeline 222, the third water outlet pipeline 223 and the fourth water outlet pipeline 224, converges in the main water outlet pipeline 220, and flows out through the liquid outlet pipeline 300.

Because first water inlet pipe 211 is close to water inlet 101, consequently, the circulation resistance in first water inlet pipe 211 is less, and fourth water inlet pipe 214 keeps away from water inlet 101, consequently, the circulation resistance in fourth water inlet pipe 214 is great, for this reason, first water inlet pipe 211 in this embodiment, second water inlet pipe 212, the flow area of third water inlet pipe 213 and fourth water inlet pipe 214 increases in proper order, thereby it is roughly the same to guarantee to get into the coolant liquid flow in every liquid cooling plate subassembly 200, it is even to guarantee the coolant liquid flow distribution in every liquid cooling plate subassembly 200, it is untimely to avoid being located the electric core heat dissipation of the battery module in the edge, be favorable to improving the temperature uniformity of each battery module in the battery package.

As an optional scheme, the first branch water inlet pipeline 211, the second branch water inlet pipeline 212, the third branch water inlet pipeline 213 and the fourth branch water inlet pipeline 214 in this embodiment are circular pipes, that is, the pipe diameters of the first branch water inlet pipeline 211, the second branch water inlet pipeline 212, the third branch water inlet pipeline 213 and the fourth branch water inlet pipeline 214 are sequentially increased, so that it is ensured that the electric core in the battery module far away from the water inlet 101 can be effectively cooled, and the temperature difference between the battery modules is small.

Of course, in some embodiments, the first branch water outlet pipeline 221, the second branch water outlet pipeline 222, the third branch water outlet pipeline 223 and the fourth branch water outlet pipeline 224 may also be round pipes.

Further, the main water inlet line 210 and the branch water inlet lines, and the main water outlet line 220 and the branch water outlet line are communicated by a three-way valve 400. Referring to fig. 5, taking the main water inlet pipeline 210 and the second branch water inlet pipeline 212 as an example for illustration, the three-way valve 400 includes a first port 401, a second port 402 and a third port 403 which are communicated with each other, the flow areas of the first port 401 and the second port 402 are equal, the first port 401 and the second port 402 are both communicated with the main water inlet pipeline 210, the flow area of the third port 403 is smaller than the flow areas of the first port 401 and the second port 402, and the third port 403 is communicated with the second branch water inlet pipeline 212.

With continued reference to fig. 3 and 4, in this embodiment, a first bellows portion 2121 is provided on the branch water inlet line, and a second bellows portion 2221 is provided on the branch water inlet line. Taking the main water inlet pipeline 210, the second branch water inlet pipeline 212, the main water outlet pipeline 220 and the second water outlet pipeline 222 as an example for illustration, the first corrugated pipe section 2121 is disposed on the second branch water inlet pipeline 212, and the second corrugated pipe section 2221 is disposed on the second branch water inlet pipeline 212, so as to facilitate the assembly of the liquid cooling system and the battery module, and after the assembly is completed, the first corrugated pipe section 2121 and the second corrugated pipe section 2221 can also absorb a part of vibration or micro displacement, and the fixing effect is good.

Further, every liquid cooling board subassembly 200 corresponds a set of intake pipe and the setting of expenditure water pipeline, every liquid cooling board subassembly 200 cools off a battery module, because all include multiseriate electricity core in every battery module, consequently every liquid cooling board subassembly 200 all includes a plurality of snakelike liquid cooling boards 230, wherein be closest to a snakelike liquid cooling board 230's of intake pipe and expenditure water pipeline both ends respectively with branch intake pipe and the intercommunication of expenditure water pipeline, communicate through connecting line 240 and this snakelike liquid cooling board 230 between all the other snakelike liquid cooling boards 230, thereby reduce the quantity that sets up and set up length of a branch intake pipe, reduce the use of material, and the structure is compacter.

Preferably, the third corrugated pipe section 2401 is provided on the connection pipe 240, so that the assembly is facilitated, and the connection pipe 240 can absorb a part of vibration and small displacement, and the fixing effect is good.

This embodiment still provides a battery package, includes a plurality of battery modules to and above-mentioned liquid cooling system, the liquid cooling system carries out cooling to each battery module respectively. Each liquid cooling board assembly 200 through the liquid cooling system can cool off a battery module respectively, electric core homoenergetic in each battery module obtains effectual cooling, the cooling is respond well, and the coolant liquid flow in the liquid cooling board assembly 200 that every battery module corresponds is even, the temperature uniformity between the electric core in each battery module is better, be favorable to prolonging the life of electric core, and above-mentioned liquid cooling system's compact structure, arrange rationally, occupation space is less, and various parts, can be general between the accessory.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A liquid cooling system, comprising:

the liquid inlet device comprises a liquid inlet pipeline (100), wherein a water inlet (101) is formed in the first end of the liquid inlet pipeline (100);

a liquid outlet pipeline (300), wherein a first end of the liquid outlet pipeline (300) is provided with a water outlet (301);

the liquid cooling system comprises a plurality of liquid cooling plate assemblies (200), wherein the inlet ends of the liquid cooling plate assemblies (200) are arranged on the same side, the inlet ends of the liquid cooling plate assemblies (200) are communicated with the second end of the liquid inlet pipeline (100), the outlet ends of the liquid cooling plate assemblies (200) are arranged on the same side, and the outlet ends of the liquid cooling plate assemblies (200) are communicated with the second end of the liquid outlet pipeline (300).

2. The liquid cooling system of claim 1, wherein the inlet line (100) is in communication with a main inlet line (210), the main inlet line (210) being in communication with a plurality of branch inlet lines, each branch inlet line being in communication with an inlet end of one of the liquid cooling plate assemblies (200).

3. The liquid cooling system of claim 2, wherein the plurality of branch inlet pipes sequentially increase in flow area in a direction away from the inlet (101) of the inlet pipe (100).

4. The liquid cooling system of claim 2, wherein the outlet line (300) is in communication with a main outlet line (220), the main outlet line (220) being in communication with a plurality of outlet lines, each outlet line being in communication with an outlet end of one of the liquid cooling plate assemblies (200).

5. The liquid cooling system of claim 4, wherein the main water inlet line (210) communicates with the branch water inlet line and/or the main water outlet line (220) communicates with the branch water outlet line via a three-way valve (400).

6. The liquid cooling system of claim 5, wherein the three-way valve (400) comprises a first port (401), a second port (402), and a third port (403) in communication with each other, the first port (401) and the second port (402) having a flow area equal to each other, and the third port (403) having a flow area smaller than the first port (401) and the second port (402).

7. The liquid cooling system of claim 4, wherein the branch inlet pipe is provided with a first bellows section (2121), and the branch outlet pipe is provided with a second bellows section (2221).

8. The liquid cooling system according to any one of claims 1-7, wherein each of said liquid cooling plate assemblies (200) is disposed corresponding to a set of branch water inlet lines and branch water outlet lines, each of said liquid cooling plate assemblies (200) comprises a plurality of serpentine liquid cooling plates (230), wherein two ends of one of said serpentine liquid cooling plates (230) are respectively communicated with said branch water inlet lines and said branch water outlet lines, and the other serpentine liquid cooling plates (230) are communicated with each other through a connecting line (240).

9. The liquid cooling system of claim 8, wherein a third bellows section (2401) is provided on the connecting line (240).

10. A battery pack, comprising a plurality of battery modules, and the liquid cooling system of any one of claims 1 to 9, wherein the liquid cooling system is configured to cool each of the battery modules.

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