CN109818112B - Working method of flow-direction-changeable power battery liquid cooling plate - Google Patents
Working method of flow-direction-changeable power battery liquid cooling plate Download PDFInfo
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- CN109818112B CN109818112B CN201910068005.0A CN201910068005A CN109818112B CN 109818112 B CN109818112 B CN 109818112B CN 201910068005 A CN201910068005 A CN 201910068005A CN 109818112 B CN109818112 B CN 109818112B
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- way reversing
- electromagnetic valve
- reversing electromagnetic
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- 238000001816 cooling Methods 0.000 title claims abstract description 74
- 239000007788 liquid Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 56
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000110 cooling liquid Substances 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 12
- 229910052744 lithium Inorganic materials 0.000 description 12
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a flow direction-changeable power battery liquid cooling plate which comprises a cooling substrate, a pipeline assembly, a first four-way reversing electromagnetic valve, a second four-way reversing electromagnetic valve and a first connecting head, wherein the cooling substrate is attached to the surface edge of a power battery, the pipeline assembly is arranged on the cooling substrate, the first four-way reversing electromagnetic valve and the second four-way reversing electromagnetic valve are connected between the cooling substrate and the pipeline assembly and are used for changing the flow direction of liquid and are matched with each other, one end of the first connecting head is connected with the first four-way reversing electromagnetic valve, the other end of the first connecting head is inserted into the cooling substrate, one end of the second connecting head is connected with the second four-way reversing electromagnetic valve, the other end of the second connecting head is inserted into the cooling substrate, and a liquid flow channel which is arranged in the cooling substrate, is respectively connected with the first connecting head and the second connecting head and is in a grid-shaped rotary closed connection mode. The invention also discloses a realization method of the flow-direction-changeable power battery liquid cooling plate. Through the scheme, the invention has the advantages of simple structure, variable liquid flow direction and the like.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a working method of a flow-direction-changeable power battery liquid cooling plate.
Background
With the increasing severity of the world energy situation and the increasing environmental awareness of people, lithium batteries as new energy are becoming more and more important. Lithium batteries are often used as a power source for electric vehicles because of their high energy density and good cycle characteristics. It is generally known that an electric vehicle can be subjected to high-power charge and discharge phenomena at random in the driving process, and a lithium battery can be subjected to serious heating phenomena in the driving process. The operation of the lithium battery must be in a designed temperature range, and the operation temperature of the lithium battery is too high or too low, which can adversely affect the working performance and the service life of the lithium battery, and meanwhile, potential safety hazards are also easily brought. The traditional cooling mode of the lithium battery of the new energy automobile is mainly divided into three modes of natural cooling, forced air cooling and liquid cooling, wherein the natural cooling is to utilize heat exchange between flowing air and the battery to dissipate heat, and the cooling effect is poor. In addition, the forced air cooling is to add a cooling fan to take away the heat generated by the lithium battery, and only the heat on the surface of the outer lithium battery can be dissipated. Whether natural cooling or forced air cooling is adopted, the air cooling system can not thoroughly solve the problem of integral sealing protection of the battery system, and has the defects of lower heat exchange efficiency, poorer temperature uniformity, easiness in condensation, dew formation and the like. Meanwhile, the liquid cooling system uses cooling liquid as a medium and uses a liquid cooling plate as a place to conduct heat exchange. The liquid cooling technology is more uniform in temperature field distribution due to high heat exchange efficiency, is convenient for high-grade waterproof and dustproof design, and is increasingly applied to the field of heat management of power batteries. However, the macroscopic temperature field uniformity of the whole power battery can not truly reflect the microscopic temperature field uniformity of each module in each area. The method is characterized in that the central temperature of the module or the module is higher than the outer temperature of the module or the module, and the gradient is gradually decreased outwards, and the gradient requirements of the temperature field in the heating mode and the heat dissipation mode are inconsistent. The general liquid cooling plates are all direct current channels, and the temperature gradient is in an attenuation trend in the flow direction, so that the requirements of the temperature uniformity of a battery system are not met.
Therefore, it is highly desirable to provide a power battery liquid cooling plate which has a simple structure, meets the requirements of different temperature gradients, and realizes the uniformity of a microscopic upper temperature field of a power battery system.
Disclosure of Invention
The invention aims to provide a working method of a flow-direction-changeable power battery liquid cooling plate, which adopts the following technical scheme:
the utility model provides a working method of power battery liquid cooling board of interchangeable flow direction, includes the laminating cooling base plate on power battery surface edge, sets up the pipeline assembly on the cooling base plate, connects between cooling base plate and pipeline assembly, is used for changing the liquid flow direction, and first four-way switching-over solenoid valve and the second four-way switching-over solenoid valve of matching each other, one end with first four-way switching-over solenoid valve is connected, and the other end inserts first connector in the cooling base plate, one end with the second four-way switching-over solenoid valve is connected, and the other end inserts the second connector in the cooling base plate, and set up in the cooling base plate, respectively with first connector and second connector are connected, and be the liquid flow path that grid form gyration closed connection.
Further, the cooling substrate comprises a bottom plate used for forming a liquid flow channel, and a cover plate buckled on the bottom plate and used for installing a first four-way reversing electromagnetic valve, a second four-way reversing electromagnetic valve, a first connector and a second connector.
Further, the pipeline assembly comprises a first water pipe and a second water pipe, wherein two ends of the first water pipe and the second water pipe are respectively connected between the first four-way reversing electromagnetic valve and the second four-way reversing electromagnetic valve, are C-shaped and are oppositely distributed, a third water pipe is connected between the first four-way reversing electromagnetic valve and the first connector, and a fourth water pipe is connected between the second four-way reversing electromagnetic valve and the second connector.
Preferably, the first four-way reversing solenoid valve and the second four-way reversing solenoid valve have the same structure, and the bottom of the second four-way reversing solenoid valve is provided with a base for being installed on the cover plate.
Further, a first connecting part connected with the first connector is arranged on the liquid flow channel, and a second connecting part connected with the second connector is arranged on the liquid flow channel.
The realization method of the flow-direction-changeable power battery liquid cooling plate comprises the following steps:
cooling mode: driving a valve core of the first four-way reversing electromagnetic valve to rotate, and enabling the first four-way reversing electromagnetic valve to be communicated with a liquid channel through a third water pipe; simultaneously, the valve core of the second four-way reversing electromagnetic valve is driven to rotate, so that the second four-way reversing electromagnetic valve is communicated with a liquid channel through a fourth water pipe; the cooling liquid sequentially passes through the second four-way reversing electromagnetic valve, the fourth water pipe, the liquid flow passage, the third water pipe and the first four-way reversing electromagnetic valve to form a cooling liquid loop of the power battery.
Heating mode: driving a valve core of the first four-way reversing electromagnetic valve to rotate, and enabling the first water pipe to be communicated with the third water pipe; meanwhile, the valve core of the second four-way reversing electromagnetic valve is driven to rotate, so that the second water pipe is communicated with the fourth water pipe; the heated liquid sequentially passes through a second four-way reversing electromagnetic valve, a first water pipe, a first four-way reversing electromagnetic valve, a third water pipe, a liquid flow passage, a fourth water pipe, a second four-way reversing electromagnetic valve, a second water pipe and a first four-way reversing electromagnetic valve to form a heating loop of the power battery.
Compared with the prior art, the invention has the following beneficial effects:
the invention skillfully sets the liquid flow passage, the first four-way reversing electromagnetic valve, the second four-way reversing electromagnetic valve and the pipeline assembly, and takes away the operation heat generated by the lithium battery or heats the lithium battery so as to ensure that the lithium battery operates within the design temperature range. The four-way reversing electromagnetic valve is arranged, so that the change of the liquid direction is realized, and the temperature uniformity of the power battery system is ensured. The liquid flow channel is in a convolution grid shape with a symmetrical structure, and when cooling or heating, the liquid is divided into two parts, so that uniform cooling or heating is realized, the heat dissipation and heating performance of the power battery are ensured, and the uniformity of a microcosmic upper temperature field of the power battery system can be realized. Through the scheme, the novel energy automobile has the advantages of simple structure, variable liquid flow direction and the like, and has high practical value and popularization value in the technical field of new energy automobiles.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope of protection, and other related drawings may be obtained according to these drawings without the need of inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a cooling substrate according to the present invention.
FIG. 3 is a schematic diagram of a piping assembly according to the present invention.
Fig. 4 is a schematic structural view of the base plate of the present invention.
Fig. 5 is a schematic structural diagram of a first four-way reversing solenoid valve according to the present invention.
FIG. 6 is a flow chart of the cooling mode liquid of the present invention.
FIG. 7 is a flow chart of a heating mode liquid according to the present invention.
In the above figures, the reference numerals correspond to the component names as follows:
1-cooling base plate, 2-pipeline assembly, 3-first four-way reversing solenoid valve, 4-second four-way reversing solenoid valve, 5-first connector, 6-second connector, 10-bottom plate, 11-cover plate, 12-first connector, 13-second connector, 14-liquid runner, 21-first water pipe, 22-second water pipe, 23-third water pipe, 24-fourth water pipe and 40-base.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
Examples
As shown in fig. 1 to 7, the present embodiment provides a working method of a power battery liquid cooling plate with a replaceable flow direction, and it should be noted that the serial numbers of "first", "second", "third" and the like in the present embodiment are only used to distinguish similar components, and are not to be construed as limiting the protection scope specifically. In this embodiment, the power battery liquid cooling plate includes a cooling substrate 1 attached to the edge of the surface of the power battery, a pipeline assembly 2 disposed on the cooling substrate 1, a first four-way reversing solenoid valve 3 and a second four-way reversing solenoid valve 4 connected between the cooling substrate 1 and the pipeline assembly 2 for changing the flow direction of the liquid and having the same structure, a first connector 5 with one end connected to the first four-way reversing solenoid valve 3 and the other end inserted into the cooling substrate 1, a second connector 6 with one end connected to the second four-way reversing solenoid valve 4 and the other end inserted into the cooling substrate 1, and a liquid channel 14 opened in the cooling substrate 1 and connected to the first connector 5 and the second connector 6 respectively and in a grid-shaped convolution closed connection. The cooling substrate 1 includes a bottom plate 10 for opening a liquid flow channel 14, and a cover plate 11 fastened to the bottom plate 10 for mounting the first four-way reversing solenoid valve 3, the second four-way reversing solenoid valve 4, the first connector 5 and the second connector 6. At the same time, a base 40 for mounting on the cover plate 11 is provided at the bottom of the second four-way reversing solenoid valve 4. The first connection portion 12 connected to the first connector 5 is provided in the fluid passage 14, and the second connection portion 13 connected to the second connector 6 is provided in the fluid passage 14.
In this embodiment, the pipeline assembly 2 includes a first water pipe 21 and a second water pipe 22, both ends of which are respectively connected between the first four-way reversing solenoid valve 3 and the second four-way reversing solenoid valve 4, and are arranged in a C-shape and are opposite to each other, a third water pipe 23 connected between the first four-way reversing solenoid valve 3 and the first connector 5, and a fourth water pipe 24 connected between the second four-way reversing solenoid valve 4 and the second connector 6.
The assembly process of the power battery liquid cooling plate is briefly described as follows:
the first step: the first four-way reversing solenoid valve and the second four-way reversing solenoid valve are mounted on the cooling substrate through bolts, the directions of the first four-way reversing solenoid valve and the second four-way reversing solenoid valve are that the interfaces a of the first four-way reversing solenoid valve and the interfaces a of the second four-way reversing solenoid valve are opposite, and the interfaces c face the outer side of the cooling substrate.
And a second step of: and connecting the pipeline assembly with the first four-way reversing electromagnetic valve, the second four-way reversing electromagnetic valve and the cooling substrate. The method comprises the following steps: the m end of the third water pipe is connected with an interface a of the first four-way reversing electromagnetic valve, and the n end of the third water pipe is connected with the first connecting head; the g end of the first water pipe is connected with the d interface of the first four-way reversing electromagnetic valve, and the h end of the first water pipe is connected with the b interface of the second four-way reversing electromagnetic valve; the e end of the second water pipe is connected with the b interface of the first four-way reversing electromagnetic valve, and the f end of the second water pipe is connected with the d interface of the second four-way reversing electromagnetic valve; the j end of the fourth water pipe is connected with an interface a of the second four-way reversing electromagnetic valve, and the k end of the fourth water pipe is connected with the second connector.
The working process of the power battery liquid cooling plate is briefly described as follows:
(1) Cooling mode:
controlling the first four-way reversing electromagnetic valve and the second four-way reversing electromagnetic valve to enable an interface a and an interface c of the first four-way reversing electromagnetic valve to be communicated, and enabling an interface b and an interface d to be closed; and the interface a and the interface c of the second four-way reversing electromagnetic valve are communicated, and the interface b and the interface d are closed.
As shown in fig. 6, the direction of the arrows in the figure indicate the direction of the liquid flow. The specific flow direction is as follows: the cooled cooling liquid flows in through the c interface of the second four-way reversing electromagnetic valve, then sequentially passes through the a interface of the second four-way reversing electromagnetic valve, the fourth water pipe and the second connector, and enters the second connecting part of the liquid flow channel. The coolant is divided into left and right paths, and flows along the fluid passages to the first connection portions. And then flows out through the first connector, the third water pipe and the interface a of the second four-way reversing electromagnetic valve and the interface c of the first four-way reversing electromagnetic valve.
(2) Heating mode:
controlling the first four-way reversing solenoid valve and the second four-way reversing solenoid valve to enable the interface b and the interface c of the first four-way reversing solenoid valve to be communicated, and enabling the interface a and the interface d to be communicated; the interface b and the interface c of the second four-way reversing electromagnetic valve are communicated, and the interface a and the interface d are communicated.
As shown in fig. 7, the direction of the arrows in the figure indicate the direction of the liquid flow. The specific flow direction is as follows: the heated cooling liquid flows in through the interface c of the second four-way reversing electromagnetic valve, then sequentially passes through the interface b of the second four-way reversing electromagnetic valve, the first water pipe, the interface d and the interface a of the first four-way reversing electromagnetic valve, the third water pipe and the first connecting head, and enters the first connecting part of the liquid flow channel. The cooling liquid is divided into a left path and a right path, and flows to the second connecting part along the liquid flow channel. And then flows out through the second connector, the fourth water pipe, the interface a and the interface d of the second four-way reversing electromagnetic valve, the second water pipe and the interface b of the first four-way reversing electromagnetic valve and the interface c of the first four-way reversing electromagnetic valve.
In the process, external cooling liquid flows in from the c interface of the second four-way reversing electromagnetic valve and flows out from the c interface of the first four-way reversing electromagnetic valve, the original arrangement of the cooling system is not changed, and the position of the cooling liquid entering the liquid cooling plate is changed only by changing the communication paths of the first four-way reversing electromagnetic valve and the second four-way reversing electromagnetic valve of the electromagnetic valve.
The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention, but all changes made by adopting the design principle of the present invention and performing non-creative work on the basis thereof shall fall within the scope of the present invention.
Claims (4)
1. The working method of the flow-direction-changeable power battery liquid cooling plate is characterized by comprising a cooling substrate (1) attached to the surface edge of a power battery, a pipeline assembly (2) arranged on the cooling substrate (1), a first four-way reversing electromagnetic valve (3) and a second four-way reversing electromagnetic valve (4) which are connected between the cooling substrate (1) and the pipeline assembly (2) and are used for changing the flow direction of liquid and matched with each other, a first connecting head (5) with one end connected with the first four-way reversing electromagnetic valve (3) and the other end inserted into the cooling substrate (1), a second connecting head (6) with one end connected with the second four-way reversing electromagnetic valve (4) and the other end inserted into the cooling substrate (1), and a liquid channel (14) which is arranged in the cooling substrate (1), is respectively connected with the first connecting head (5) and the second connecting head (6) and is in grid-shaped rotary closed connection;
the pipeline assembly (2) comprises a first water pipe (21) and a second water pipe (22) which are respectively connected between the first four-way reversing electromagnetic valve (3) and the second four-way reversing electromagnetic valve (4) at two ends and are in a C shape and are oppositely arranged, a third water pipe (23) connected between the first four-way reversing electromagnetic valve (3) and the first connector (5), and a fourth water pipe (24) connected between the second four-way reversing electromagnetic valve (4) and the second connector (6);
the working method of the flow-direction-changeable power battery liquid cooling plate comprises the following steps:
cooling mode: driving a valve core of the first four-way reversing electromagnetic valve (3) to rotate, and enabling the first four-way reversing electromagnetic valve (3) to be communicated with a liquid flow channel (14) through a third water pipe (23); simultaneously, the valve core of the second four-way reversing electromagnetic valve (4) is driven to rotate, so that the second four-way reversing electromagnetic valve (4) is communicated with the liquid flow channel (14) through a fourth water pipe (24); the cooling liquid sequentially passes through the second four-way reversing electromagnetic valve (4), the fourth water pipe (24), the liquid channel (14), the third water pipe (23) and the first four-way reversing electromagnetic valve (3) to form a cooling liquid loop of the power battery;
heating mode: driving a valve core of the first four-way reversing electromagnetic valve (3) to rotate, and enabling the first water pipe (21) to be communicated with the third water pipe (23); simultaneously, the valve core of the second four-way reversing electromagnetic valve (4) is driven to rotate, so that the second water pipe (22) is communicated with the fourth water pipe (24); the heated liquid sequentially passes through a second four-way reversing electromagnetic valve (4), a first water pipe (21), a first four-way reversing electromagnetic valve (3), a third water pipe (23), a liquid channel (14), a fourth water pipe (24), the second four-way reversing electromagnetic valve (4), a second water pipe (22) and the first four-way reversing electromagnetic valve (3) to form a heating loop of the power battery.
2. The working method of the flow-direction-changeable power battery liquid cooling plate according to claim 1, wherein the cooling substrate (1) comprises a bottom plate (10) for forming a liquid flow channel (14), and a cover plate (11) which is buckled on the bottom plate (10) and is used for installing a first four-way reversing electromagnetic valve (3), a second four-way reversing electromagnetic valve (4), a first connecting head (5) and a second connecting head (6).
3. The working method of the flow-direction-changeable power battery liquid cooling plate according to claim 2, wherein the first four-way reversing electromagnetic valve (3) and the second four-way reversing electromagnetic valve (4) have the same structure, and a base (40) for being mounted on a cover plate (11) is arranged at the bottom of the second four-way reversing electromagnetic valve (4).
4. A working method of a flow-direction-changeable power battery liquid cooling plate according to claim 3, characterized in that the liquid flow channel (14) is provided with a first connecting part (12) connected with the first connector (5), and the liquid flow channel (14) is provided with a second connecting part (13) connected with the second connector (6).
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| CN201910068005.0A CN109818112B (en) | 2019-01-24 | 2019-01-24 | Working method of flow-direction-changeable power battery liquid cooling plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110492196B (en) * | 2019-08-02 | 2020-11-13 | 广州小鹏汽车科技有限公司 | Thermal management system, vehicle, conversion device and thermal management method |
| CN114927792B (en) * | 2022-05-12 | 2024-04-02 | 广汽埃安新能源汽车有限公司 | Cooling device, temperature difference adjusting method, power battery module and electric vehicle |
| CN115882121A (en) * | 2022-09-27 | 2023-03-31 | 中国第一汽车股份有限公司 | Power battery temperature control method, system and device and vehicle |
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