CN115425328B - Electric core liquid cooling plate, battery thermal management system, electric vehicle and design method - Google Patents
Electric core liquid cooling plate, battery thermal management system, electric vehicle and design method Download PDFInfo
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- CN115425328B CN115425328B CN202211381823.4A CN202211381823A CN115425328B CN 115425328 B CN115425328 B CN 115425328B CN 202211381823 A CN202211381823 A CN 202211381823A CN 115425328 B CN115425328 B CN 115425328B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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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Abstract
The invention discloses an electric core liquid cooling plate, a battery thermal management system, an electric vehicle and a design method, and belongs to the technical field of new energy automobiles. According to the invention, the runner rib structures are respectively arranged on the two sides of the substrate, so that the liquid cooling plate has excellent heat dissipation performance, the battery management system respectively acquires the highest temperature and the lowest temperature of the battery module within a sampling time period, and the working mode judgment is carried out according to the highest temperature and the lowest temperature of the battery module, so that the temperature control effect on the battery cell can be realized.
Description
Technical Field
The invention discloses an electric core liquid cooling plate, a battery thermal management system, an electric vehicle and a design method, and belongs to the technical field of new energy automobiles.
Background
At present, the development prospect of new energy automobiles is very wide. The new energy automobile has the advantages of high energy efficiency, zero emission, no pollution, high specific energy, low noise, high reliability and the like. The power battery system is used as a main energy storage component of the new energy battery vehicle, and mainly ensures the functions of driving of the whole vehicle, the power demand of high-low voltage components, braking energy recovery, energy regulation of a hybrid power engine system and the like. The lower box body and the liquid cooling plate of the battery assembly are used as core components for protecting the structure of the battery assembly and realizing the heat management function, and the importance of the lower box body and the liquid cooling plate is self-evident.
At present, the mainstream battery assembly scheme is a standard module or a CTP (computer to plate) configuration battery assembly, and the two schemes have complicated structures and are limited by the Z-direction arrangement height, low integration, low efficiency of a thermal management system and low heat exchange efficiency.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an electric core liquid cooling plate, a battery heat management system, an electric vehicle and a design method, and mainly solves the industrial problems of low heat exchange efficiency of the liquid cooling plate, low modularization level of the heat management system and low integration level of a battery assembly in the prior art.
The technical scheme of the invention is as follows:
according to a first aspect of the embodiments of the present invention, an electric core liquid cooling plate is provided, where the electric core liquid cooling plate includes a liquid cooling substrate having an inverted trapezoid side surface, a water outlet and a water inlet are symmetrically arranged at two ends of the side surface of the liquid cooling substrate, flow channel rib structures having the same structure and being communicated with each other are symmetrically arranged at two sides of the liquid cooling substrate between the water outlet and the water inlet, and the water outlet and the water inlet are communicated with the flow channel rib structures through an internal flow channel of the liquid cooling substrate.
Preferably, the water outlet and the water inlet are respectively arranged on the same side of the liquid cooling substrate.
Preferably, the runner rib structure comprises shunting structures symmetrically arranged on the liquid cooling substrate, two buffer structures are symmetrically arranged on the liquid cooling substrate between the shunting structures, two runner uniform structures are arranged on the liquid cooling substrate between the buffer structures, the shunting structures are respectively communicated with the two buffer structures through the internal runners of the liquid cooling substrate, and the buffer structures are respectively communicated with the runner uniform structures through the internal runners of the liquid cooling substrate.
Preferably, the water outlet and the water inlet are respectively communicated with the two shunting structures through the internal flow channel of the liquid cooling substrate, and the flow channel uniform structure is a groove structure vertical to the center.
Preferably, the liquid cooling base plate is provided with cylindrical bosses at the water outlet and the water inlet respectively, the edge angles of the two ends of the top of the liquid cooling base plate are of arc-shaped structures, and the cylindrical bosses and the arc-shaped structures are arranged coaxially.
According to a second aspect of an embodiment of the present invention, a battery module is provided, which is applied to the battery core liquid cooling plate described in the first aspect, and includes a plurality of battery cores, wherein the battery core liquid cooling plates are arranged at two ends of the battery module formed by the plurality of battery cores in a central symmetry manner with respect to a geometric origin, and the two battery core liquid cooling plates are communicated with each other.
According to a third aspect of the embodiment of the present invention, a battery thermal management system is provided, which is applied to the battery module set of the second aspect, and includes a battery management system electrically connected to a plurality of battery cells, the battery management system is electrically connected to a heating module, a cooling module and an electronic water pump respectively, and the heating module and the cooling module are connected to a battery cell liquid cooling plate and an electronic water pump respectively;
the battery management system is used for respectively acquiring the highest temperature and the lowest temperature of the battery module in a sampling time period, and judging the working mode according to the highest temperature and the lowest temperature of the battery module:
when the highest temperature of the battery module is higher than a cooling mode threshold value of minus 1 ℃, the working mode is a cooling working mode;
when the lowest temperature of the battery module is less than the heating mode threshold value and 4 ℃, the working mode is a heating working mode;
when the highest temperature of the battery module-the lowest temperature of the battery module is higher than a heat preservation mode threshold value-1 ℃, the working mode is a heat preservation working mode;
when the highest temperature of the battery module is higher than a threshold value of an equalization mode to minus 1.5 ℃, the working mode is the equalization working mode;
when the highest temperature of the battery module is larger than a safety mode threshold value, the working mode is a safety working mode;
generating corresponding working mode instructions according to the working modes and respectively sending the corresponding working mode instructions to the heating module, the cooling module and the electronic water pump;
and the heating module, the cooling module and the electronic water pump respectively receive corresponding working mode instructions and execute corresponding heating work, cooling work and flow regulation work.
Preferably, when the operation mode is a cooling operation mode, the corresponding operation mode command includes: the temperature of a cooling liquid water inlet is less than or equal to 20 ℃, the flow rate of the cooling liquid is more than or equal to 15L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.1L/min;
when the working mode is a heating working mode, the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is more than or equal to 55 ℃, the flow of the cooling liquid is more than or equal to 15L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 3 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.1L/min;
the working mode is a heat preservation working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is more than or equal to 25 ℃ and less than or equal to 30 ℃, the flow of the cooling liquid is less than or equal to 1L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.5 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.05L/min;
the working mode is a balanced working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is more than or equal to 26 ℃, the flow rate of the cooling liquid is less than or equal to 0.5L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.2L/min;
the working mode is a safe working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is less than or equal to 10 ℃, the flow rate of the cooling liquid is more than or equal to 30L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 2 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1L/min.
According to a fourth aspect of the embodiments of the present invention, there is provided an electric vehicle including a vehicle body and the battery thermal management system of the third aspect.
According to a fifth aspect of embodiments of the present invention, there is provided a design method for designing the electric core liquid cooling plate of the first aspect, including:
step S1, using the total heat management power of a battery cell and the limit installation size of a heat management system as design input;
s2, determining the limit size of the battery liquid cooling plate according to the total battery cell thermal management power and the limit installation size of the thermal management system, wherein the limit size of the battery liquid cooling plate comprises the following steps: the method comprises the following steps of:
the total heat management power of the battery core and the limit installation size of the heat management system obtain the limit size area of the liquid cooling plate of the battery through a formula (1):
wherein: CH is total heat management power of the battery cell, GC is limit installation size of a heat management system, CC is total energy related structural coefficient of the battery module, the value is 0.65-0.76, A is mass center structure compensation parameter, the value is 0 & gt A & gt-0.32, D is cell expansion pressure compensation parameter, and the value is 56 degrees and more than D & gt 32 degrees;
the ultimate size area of the battery liquid cooling plate determines the ultimate thickness size of the battery liquid cooling plate according to a formula (2):
wherein: c is the limit thickness dimension of the liquid cooling plate of the battery, GB is the limit dimension of the technical length of the battery cell, E is the expansion safety dimension coefficient of the battery cell, the value is 1.53-1.73, D is the expansion pressure compensation parameter of the battery cell, and the value is more than 56 degrees and more than 32 degrees;
s3, determining a flow channel rib structure;
and S4, regulating the limit size and the flow channel rib structure of the electric core liquid cooling plate by adopting computational structural mechanics simulation.
The invention has the beneficial effects that:
the invention discloses an electric core liquid cooling plate, a battery thermal management system, an electric vehicle and a design method, wherein runner rib structures are respectively arranged on two sides of a substrate, so that the liquid cooling plate is excellent in heat dissipation performance and excellent in temperature uniformity, the battery thermal runaway can be protected, the thermal spreading speed of an electric core is reduced, and severe temperature changes are delayed.
Drawings
Fig. 1 is an isometric view of a cell liquid cooling plate of the present invention.
Fig. 2 is an isometric view of a battery module according to the present invention.
Fig. 3 is an electrical connection diagram of a battery thermal management system of the present invention.
Fig. 4 is a piping diagram of a battery thermal management system of the present invention.
The device comprises a 1-battery cell, a 2-battery cell liquid cooling plate, a 201-flow channel uniform structure, a 202-buffer structure, a 203-water outlet, a 204-water inlet, a 205-liquid cooling substrate, a 206-cylindrical boss, a 207-circular arc structure and a 208-shunt structure.
Detailed Description
The invention is further illustrated below with reference to the accompanying figures 1-4:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
As shown in fig. 1, a first embodiment of the present invention provides a battery cell liquid cooling plate based on the prior art, where the battery cell liquid cooling plate 2 includes a liquid cooling substrate 205 with an inverted trapezoid side surface, two ends of the side surface of the liquid cooling substrate 205 are respectively and symmetrically disposed with a water outlet 203 and a water inlet 204, two sides of the liquid cooling substrate 205 between the water outlet 203 and the water inlet 204 are symmetrically disposed with flow channel rib structures having the same structure and being communicated with each other, and the water outlet 203 and the water inlet 204 are communicated with the flow channel rib structures through a flow channel inside the liquid cooling substrate 205.
The water outlet 203 and the water inlet 204 are respectively arranged on two sides of the liquid-cooled substrate 205 in one embodiment, the water outlet 203 and the water inlet 204 are respectively arranged on the same side of the liquid-cooled substrate 205 in another embodiment, and the drawings of the embodiment are arranged on the same side.
The runner rib structure comprises shunting structures 208 symmetrically arranged on a liquid cooling substrate 205, buffer structures 202 are symmetrically arranged on the liquid cooling substrate 205 between the two shunting structures 208, a runner uniform structure 201 is arranged on the liquid cooling substrate 205 between the two buffer structures 202, the two shunting structures 208 are respectively communicated with the two buffer structures 202 through the internal runner of the liquid cooling substrate 205, and the two buffer structures 202 are respectively communicated with the runner uniform structure 201 through the internal runner of the liquid cooling substrate 205. The water outlet 203 and the water inlet 204 are respectively communicated with the two flow dividing structures 208 through the internal flow channels of the liquid cooling substrate 205, and the flow channel homogenizing structure 201 is a groove structure vertical along the center.
As shown in fig. 2, a second embodiment of the present invention provides a battery module based on the first embodiment, and the battery module is applied to the battery cell liquid cooling plate described in the first embodiment, and includes a plurality of battery cells 1, the battery module formed by the plurality of battery cells 1 is provided with battery cell liquid cooling plates 2 symmetrically arranged in a geometric origin center, the two battery cell liquid cooling plates 2 are communicated with each other, and battery cooling liquid flows and exchanges from the two battery cell liquid cooling plates 2 through corresponding water outlets 203 and 204, so as to implement a thermal management function for the battery, including but not limited to, heating, cooling, heat preservation, balancing, safety, and other thermal management functions.
As shown in fig. 3 to 4, a third embodiment of the present invention provides a battery thermal management system based on the second embodiment, which is applied to the battery module described in the second embodiment, and includes a battery management system electrically connected to a plurality of battery cells 1, the battery management system is electrically connected to a heating module, a cooling module and an electronic water pump respectively, and the heating module and the cooling module are connected to a battery cell liquid cooling plate and an electronic water pump pipeline respectively.
The battery management system is used for respectively acquiring the highest temperature and the lowest temperature of the battery module in a sampling time period, and judging the working mode according to the highest temperature and the lowest temperature of the battery module:
when the highest temperature of the battery module is higher than a cooling mode threshold value of minus 1 ℃, the working mode is a cooling working mode;
when the lowest temperature of the battery module is less than a heating mode threshold value and 4 ℃, the working mode is a heating working mode;
when the highest temperature of the battery module-the lowest temperature of the battery module is higher than a heat preservation mode threshold value-1 ℃, the working mode is a heat preservation working mode;
when the highest temperature of the battery module is higher than a threshold value of an equalization mode to minus 1.5 ℃, the working mode is the equalization working mode;
when the highest temperature of the battery module is larger than a safety mode threshold value, the working mode is a safety working mode;
generating corresponding working mode instructions according to the working modes and respectively sending the corresponding working mode instructions to a heating module, a cooling module and an electronic water pump, wherein:
when the working mode is a cooling working mode, the corresponding working mode command comprises: the temperature of a cooling liquid water inlet is less than or equal to 20 ℃, the flow of the cooling liquid is more than or equal to 15L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.1L/min;
when the mode of operation is heating mode of operation, corresponding mode of operation instruction includes: the temperature of a cooling liquid water inlet is more than or equal to 55 ℃, the flow of the cooling liquid is more than or equal to 15L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 3 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.1L/min;
the mode is heat preservation mode, and corresponding mode instruction includes: the temperature of a cooling liquid water inlet is more than or equal to 25 ℃ and less than or equal to 30 ℃, the flow of the cooling liquid is less than or equal to 1L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.5 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.05L/min;
the working mode is a balanced working mode, and the corresponding working mode instruction comprises the following steps: the temperature of a cooling liquid water inlet is more than or equal to 26 ℃ and less than or equal to 29 ℃, the flow of the cooling liquid is less than or equal to 0.5L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.2L/min;
the working mode is a safe working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is less than or equal to 10 ℃, the flow rate of the cooling liquid is more than or equal to 30L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 2 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1L/min.
The heating module, the cooling module and the electronic water pump respectively receive the corresponding working mode instructions and execute corresponding heating work, cooling work and flow regulation work. The cooling module may be a water heater (WPTC), the cooling module heats the temperature of the cooling fluid inlet to a corresponding temperature range according to a corresponding operating mode command, the cooling module is a common knowledge of the person skilled in the art, the heating module may be a radiator, a temperature sensor, and a cooling fan, the rotation speed of the cooling fan is adjusted according to the corresponding operating mode command, and the temperature of the cooling fluid inlet is cooled to the corresponding temperature range by feeding back the temperature of the cooling fluid through the outlet temperature sensor.
The fourth embodiment of the invention provides an electric vehicle on the basis of the third embodiment, and the electric vehicle comprises a vehicle body and the battery thermal management system in the third embodiment.
A fifth embodiment of the present invention provides a design method for designing the electric core liquid cooling plate according to the first embodiment, based on the fourth embodiment, including:
step S1, taking the total heat management power of the battery cell and the limit installation size of a heat management system as design input;
s2, determining the limit size of the battery liquid cooling plate according to the total battery cell thermal management power and the limit installation size of the thermal management system, wherein the limit size of the battery liquid cooling plate comprises the following steps: the method comprises the following specific steps of:
the ultimate size area of the battery liquid cooling plate is obtained by the total thermal management power of the battery core and the ultimate installation size of the thermal management system through a formula (1):
wherein: CH is total heat management power of the battery cell, GC is limit installation size of a heat management system, CC is total energy related structural coefficient of the battery module, the value is 0.65-0.76, A is mass center structure compensation parameter, the value is 0 & gt A & gt-0.32, D is cell expansion pressure compensation parameter, and the value is 56 degrees and more than D & gt 32 degrees;
determining the ultimate thickness size of the liquid cooling plate of the battery according to a formula (2) by the ultimate size area of the liquid cooling plate of the battery:
wherein: c is the limit thickness size of the liquid cooling plate of the battery, GB is the limit size of the technical length of the battery cell, E is the expansion safe size coefficient of the battery cell, the value is 1.53-1.73, D is the expansion pressure compensation parameter of the battery cell, and the value is more than 56 degrees and more than 32 degrees;
s3, determining a flow channel rib structure;
and S4, regulating the limit size and the flow channel rib structure of the electric core liquid cooling plate by adopting computational structural mechanics simulation.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (6)
1. The electric core liquid cooling plate is characterized in that the electric core liquid cooling plate (2) comprises a liquid cooling substrate (205) with an inverted trapezoid-shaped side surface, a water outlet (203) and a water inlet (204) are symmetrically arranged at two ends of the side surface of the liquid cooling substrate (205) respectively, flow channel rib structures which are identical in structure and communicated with each other are symmetrically arranged at two sides of the liquid cooling substrate (205) between the water outlet (203) and the water inlet (204), the water outlet (203) and the water inlet (204) are communicated with the flow channel rib structures through an internal flow channel of the liquid cooling substrate (205), the water outlet (203) and the water inlet (204) are arranged at the same side of the liquid cooling substrate (205) respectively, each flow channel rib structure comprises a flow distribution structure (208) symmetrically arranged on the liquid cooling substrate (205) between the two flow distribution structures (208), a buffer structure (202) is symmetrically arranged on the liquid cooling substrate (205) between the two buffer structures (202), the two flow channel uniform structures (201) are communicated with the two buffer structures (202) through the internal flow channel (205) respectively, the two liquid cooling substrates (202) are communicated with the water inlet (205) and the two flow channel rib structures (201) through the two liquid cooling substrate (203) respectively, runner even structure (201) are along the vertically groove structure in center, delivery port (203) and water inlet (204) punishment are equipped with cylindrical boss (206) respectively on liquid cooling base plate (205), circular-arc structure (207) are established to liquid cooling base plate (205) top both ends edge angle, cylindrical boss (206) and circular-arc structure (207) coaxial line are arranged.
2. The utility model provides a battery module, its characterized in that is applied to an electric core liquid cold plate of claim 1, includes a plurality of electric cores (1), and is a plurality of battery module both ends that electric core (1) are constituteed are that geometry original point central symmetry arranges electric core liquid cold plate (2), two electric core liquid cold plate (2) are linked together.
3. The battery thermal management system is applied to the battery module set in claim 2, and is characterized by comprising a battery management system electrically connected with a plurality of battery cores (1), wherein the battery management system is respectively electrically connected with a heating module, a cooling module and an electronic water pump, and the heating module and the cooling module are respectively connected with a battery core liquid cooling plate and the electronic water pump through pipelines;
the battery management system is used for respectively acquiring the highest temperature and the lowest temperature of the battery module in a sampling time period, and judging the working mode according to the highest temperature and the lowest temperature of the battery module:
when the highest temperature of the battery module is higher than a cooling mode threshold value of minus 1 ℃, the working mode is a cooling working mode;
when the lowest temperature of the battery module is less than a heating mode threshold value and 4 ℃, the working mode is a heating working mode;
when the highest temperature of the battery module-the lowest temperature of the battery module is higher than a heat preservation mode threshold value-1 ℃, the working mode is a heat preservation working mode;
when the highest temperature of the battery module is higher than a threshold value of an equalization mode to minus 1.5 ℃, the working mode is the equalization working mode;
when the highest temperature of the battery module is larger than a safety mode threshold value, the working mode is a safety working mode;
generating corresponding working mode instructions according to the working modes and respectively sending the corresponding working mode instructions to the heating module, the cooling module and the electronic water pump;
and the heating module, the cooling module and the electronic water pump respectively receive corresponding working mode instructions and execute corresponding heating work, cooling work and flow regulation work.
4. The battery thermal management system of claim 3, wherein when the operating mode is a cooling operating mode, the corresponding operating mode command comprises: the temperature of a cooling liquid water inlet is less than or equal to 20 ℃, the flow of the cooling liquid is more than or equal to 15L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.1L/min;
when the working mode is a heating working mode, the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is more than or equal to 55 ℃, the flow rate of the cooling liquid is more than or equal to 15L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 3 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.1L/min.
The working mode is a heat preservation working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is more than or equal to 25 ℃, the flow rate of the cooling liquid is less than or equal to 1L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.5 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.05L/min;
the working mode is a balanced working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is more than or equal to 26 ℃, the flow rate of the cooling liquid is less than or equal to 0.5L/min, the temperature difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1 ℃, and the flow difference of the water inlets of the left plate and the right plate of the cooling plate is less than or equal to 0.2L/min;
the working mode is a safe working mode, and the corresponding working mode instruction comprises: the temperature of a cooling liquid water inlet is less than or equal to 10 ℃, the flow of the cooling liquid is more than or equal to 30L/min, the temperature difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 2 ℃, and the flow difference of water inlets of the left plate and the right plate of the cooling plate is less than or equal to 1L/min.
5. An electric vehicle comprising a vehicle body and a battery thermal management system of claim 3 or 4.
6. A design method for designing the electric core liquid cold plate of claim 1, comprising:
step S1, taking the total heat management power of the battery cell and the limit installation size of a heat management system as design input;
s2, determining the limit size of the electric core liquid cooling plate according to the total electric core thermal management power and the limit installation size of the thermal management system, wherein the limit size of the electric core liquid cooling plate comprises the following steps: the extreme size area and the extreme thickness size of electric core liquid cold plate, concrete step includes:
the total heat management power of the battery core and the limit installation size of the heat management system obtain the limit size area of the liquid cooling plate of the battery core through a formula (1):
wherein: CH is the total heat management power of the battery core, GC is the limit installation size of the heat management system, CC is the total energy related structural coefficient of the battery module, the value is 0.65-0.76, A is the mass center structure compensation parameter, the value is 0 & gt A & gt-0.32, D is the expansion pressure compensation parameter of the battery core, and the value is 56 degrees & gt D & gt 32 degrees;
the ultimate size area of the electric core liquid cooling plate determines the ultimate thickness size of the electric core liquid cooling plate according to a formula (2):
wherein: c is the limit thickness dimension of the electric core liquid cooling plate, GB is the limit dimension of the electric core process length, E is the electric core expansion safety dimension coefficient, the value is 1.53-1.73, D is the electric core expansion pressure compensation parameter, the value is more than 56 degrees and more than 32 degrees;
s3, determining a flow channel rib structure;
and S4, regulating the limit size and the flow channel rib structure of the electric core liquid cooling plate by adopting computational structural mechanics simulation.
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| CN202211381823.4A CN115425328B (en) | 2022-11-07 | 2022-11-07 | Electric core liquid cooling plate, battery thermal management system, electric vehicle and design method |
| PCT/CN2023/091967 WO2024098683A1 (en) | 2022-11-07 | 2023-05-04 | Battery cell liquid cooled plate, battery thermal management system, electric vehicle and design method |
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| CN202211381823.4A CN115425328B (en) | 2022-11-07 | 2022-11-07 | Electric core liquid cooling plate, battery thermal management system, electric vehicle and design method |
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| CN115441094B (en) * | 2022-11-08 | 2023-03-24 | 中国第一汽车股份有限公司 | Liquid cooling plate, battery assembly, electric vehicle and design method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014183044A (en) * | 2013-03-20 | 2014-09-29 | Simplo Technology Co Ltd | Heat conduction structure |
| CN211182447U (en) * | 2019-11-21 | 2020-08-04 | 国联汽车动力电池研究院有限责任公司 | Liquid cooling plate |
| CN115020868A (en) * | 2022-08-09 | 2022-09-06 | 中国第一汽车股份有限公司 | Heat management device, power battery assembly and control method thereof |
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| JP2018170211A (en) * | 2017-03-30 | 2018-11-01 | 株式会社東芝 | Battery pack and battery pack module |
| CN207690957U (en) * | 2017-12-15 | 2018-08-03 | 广东亿纬赛恩斯新能源系统有限公司 | A kind of cooling device and battery system |
| KR102554939B1 (en) * | 2018-01-08 | 2023-07-11 | 현대자동차주식회사 | Cooling apparatus for battery |
| CN113363611A (en) * | 2020-03-02 | 2021-09-07 | 格朗吉斯铝业（上海）有限公司 | Liquid cooling plate and thermal management system for new energy vehicle |
| CN211829115U (en) * | 2020-04-20 | 2020-10-30 | 湖北亿纬动力有限公司 | Liquid cooling board and battery package |
| CN115425328B (en) * | 2022-11-07 | 2023-03-07 | 中国第一汽车股份有限公司 | Electric core liquid cooling plate, battery thermal management system, electric vehicle and design method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014183044A (en) * | 2013-03-20 | 2014-09-29 | Simplo Technology Co Ltd | Heat conduction structure |
| CN211182447U (en) * | 2019-11-21 | 2020-08-04 | 国联汽车动力电池研究院有限责任公司 | Liquid cooling plate |
| CN115020868A (en) * | 2022-08-09 | 2022-09-06 | 中国第一汽车股份有限公司 | Heat management device, power battery assembly and control method thereof |
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