CN115133173A - Power battery assembly, thermal management system, thermal management method and vehicle - Google Patents

Power battery assembly, thermal management system, thermal management method and vehicle Download PDF

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Publication number
CN115133173A
CN115133173A CN202210732415.2A CN202210732415A CN115133173A CN 115133173 A CN115133173 A CN 115133173A CN 202210732415 A CN202210732415 A CN 202210732415A CN 115133173 A CN115133173 A CN 115133173A
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CN
China
Prior art keywords
battery
assembly
box body
upper box
flow passage
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Pending
Application number
CN202210732415.2A
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Chinese (zh)
Inventor
杨明
张占江
孙焕丽
张新宾
阎超
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FAW Group Corp
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FAW Group Corp
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Publication date
Application filed by FAW Group Corp filed Critical FAW Group Corp
Priority to CN202210732415.2A priority Critical patent/CN115133173A/en
Publication of CN115133173A publication Critical patent/CN115133173A/en
Pending legal-status Critical Current

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • 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
    • 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
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • 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
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • 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
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • 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
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Secondary Cells (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The invention discloses a power battery assembly, a thermal management system, a thermal management method and a vehicle, wherein the power battery assembly comprises an upper box body assembly, a lower box body assembly, a battery pack and a battery management system, wherein the upper box body is arranged on the upper box body, and an upper box flow channel is arranged in the upper box body; a lower box flow passage is arranged in the lower box body of the lower box body assembly, and the upper box body assembly and the lower box body assembly are surrounded to form an accommodating cavity; the battery pack is composed of a plurality of battery cells, the battery pack is arranged in the accommodating cavity, the upper surface and the lower surface of the battery pack are respectively connected with the upper box body and the lower box body, the battery cells are cuboid, and the top covers of the battery cells are positioned on the left side and the right side of the battery cells; the battery management system is arranged on the battery cell at the front end of the battery pack; the invention improves the arrangement space of the battery of the whole vehicle, reduces the weight of the whole vehicle and improves the endurance of the whole vehicle; the floor is platformized, and the vehicle development efficiency is improved; flat floor, improve riding comfort; the structural strength of the whole vehicle is improved; the thermal management efficiency of the battery is improved.

Description

Power battery assembly, thermal management system, thermal management method and vehicle
Technical Field
The invention relates to the technical field of power batteries of electric automobiles, in particular to a power battery assembly, a thermal management system, a thermal management method and a vehicle.
Background
With the development of electric automobiles, users have higher and higher requirements on the endurance mileage of the whole automobile and have higher and higher requirements on the electric quantity of a power battery. Meanwhile, in order to meet the requirement of a user on quick energy supplement, the requirement on battery thermal management is more strict due to the improvement of battery charging power.
The existing electric automobile generally adopts a structure that a battery is separated from the whole automobile, and the whole automobile has the problem of heavy weight; the existing battery cooling system has the problem that the temperature difference is large due to the fact that the cooling surface is the bottom of the battery cell generally.
Disclosure of Invention
The invention aims to provide a power battery assembly, a thermal management system, a thermal management method and a vehicle, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a power cell assembly, comprising:
the upper box body assembly comprises an upper box body and an upper box side wall, the upper box body is connected with the upper box side wall, and an upper box flow passage for heat management is arranged in the upper box body;
the lower box body assembly comprises a lower box body and a lower box side wall, the upper box body is connected with the upper box side wall, a lower box flow passage for heat management is arranged in the lower box body, the end surface of the lower box side wall is connected with the end surface of the upper box side wall, and the upper box body assembly and the lower box body assembly are surrounded to form an accommodating cavity;
the battery pack is composed of a plurality of battery cells, the battery pack is arranged in the accommodating cavity, the upper surface and the lower surface of the battery pack are respectively connected with the upper box body and the lower box body, the battery cells are cuboid, and the top covers of the battery cells are positioned on the left side and the right side of the battery cells;
and the battery management system is arranged on the battery cell at the front end of the battery pack.
Furthermore, the upper box body assembly further comprises an upper box pipeline, the upper box pipeline is provided with an upper box water inlet pipe and an upper box water outlet pipe, the upper box runner is provided with an upper runner water inlet and an upper runner water outlet, the upper box water inlet pipe is communicated with the upper runner water inlet, and the upper box water outlet pipe is communicated with the upper runner water outlet.
Further, the lower box body assembly further comprises a lower box pipeline, the lower box pipeline is provided with a lower box water inlet pipe and a lower box water outlet pipe, the lower box flow channel is provided with a lower flow channel water inlet and a lower flow channel water outlet, the lower box water inlet pipe is communicated with the lower flow channel water inlet, and the lower box water outlet pipe is communicated with the lower flow channel water outlet.
Further, a seat fixing beam is arranged on the upper surface of the upper box body and used for bearing a vehicle seat.
Furthermore, go up the case body with go up case lateral wall formula extrusion structure as an organic whole, the material is the aluminum alloy material.
Furthermore, the lower box main body and the side wall of the lower box are of an integrated extrusion structure and are made of aluminum alloy materials.
In another aspect, a thermal management system for a power battery assembly is provided, including:
the temperature sampling module is connected with the battery management system, and is arranged on a battery cell with half positioned above the battery cell top cover and the other half positioned below the battery cell top cover and used for uniformly acquiring the temperature above and below the battery pack;
the electromagnetic control valve is connected with the battery management system;
the water outlet of the whole vehicle water pump is communicated with an electromagnetic control valve through the water inlet pipeline, and the electromagnetic control valve is respectively communicated with the water inlet of the upper box flow passage and the water inlet of the lower box flow passage; the electromagnetic control valve respectively controls the water inlet pipeline to be connected with the water inlet of the upper box flow passage and the water inlet of the lower box flow passage, and the electromagnetic control valve can realize the communication between the water inlet pipeline and the water inlet of the upper box flow passage or the water inlet of the lower box flow passage of the power battery assembly or the communication between the water inlet pipeline and the water inlet of the upper box flow passage or the water inlet of the lower box flow passage of the power battery assembly at the same time according to a control instruction of a battery management system;
and the water outlet pipeline is communicated with the water outlet of the upper box flow passage and the water outlet of the lower box flow passage through a three-way pipe.
In yet another aspect, a vehicle is provided, comprising: a floor and any one of the power battery assemblies described above; the floor comprises a front engine room, a rear floor and threshold beams on the left side and the right side; the front end of the power battery assembly is connected with the front engine room, the left side and the right side of the power battery assembly are respectively connected with the threshold beams on the left side and the right side, and the rear end of the power battery assembly is connected with the rear floor.
The floor is connected with the power battery assembly in a sealing mode through the sealing strip, and the structural form of the section of the sealing strip is circular; the sealing interface of the rear floor and the power battery assembly is plane sealing.
In another aspect, a method for thermal management of a power battery assembly is provided, including:
respectively acquiring upper temperature information and lower temperature information of the battery core;
setting a temperature difference threshold value of the upper temperature and the lower temperature of the battery cell;
the battery management system reads the temperature information and judges whether to execute heating or cooling of the battery core;
the battery management system sends a heating or cooling command to the whole vehicle, and the whole vehicle controller starts heating or cooling;
when the battery management system judges that the battery needs to be heated or cooled, the battery control system calculates whether the temperature difference of the battery is greater than the temperature difference threshold value;
and when the temperature difference of the battery is greater than the temperature difference threshold value, controlling the electromagnetic valve to open the heat management channel of the upper box body assembly or the lower box body assembly.
When the temperature difference of the battery is smaller than the temperature difference threshold value, opening the heat management channels of the box body assembly and the lower box body assembly simultaneously;
the battery management system judges whether to stop heating or cooling according to the current temperature and the temperature difference of the battery core;
and the battery management system sends a heating stop or cooling command to the whole vehicle, and the whole vehicle stops heating or cooling.
Compared with the prior art, the invention has the beneficial effects that: the battery arrangement space of the whole vehicle is improved, the weight of the whole vehicle is reduced, and the endurance of the whole vehicle is improved; the floor is platformized, and the vehicle development efficiency is improved; flat floor, improve riding comfort; the structural strength of the whole vehicle is improved; the thermal management efficiency of the battery is improved.
Drawings
FIG. 1 is a schematic view of a power battery assembly and a vehicle floor structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a power battery assembly according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a lower case assembly and a battery pack of a power battery assembly according to an embodiment of the invention;
FIG. 4 is a side cross-sectional view of a power cell assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a power battery assembly and an underfloor structure connection according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for thermal management of a power cell assembly according to an embodiment of the present disclosure;
fig. 7 is a technical route diagram of a thermal management method for a power battery assembly according to an embodiment of the present invention;
in the figure: 1. a floor assembly; 11. a front nacelle; 12. a rear floor; 13. a threshold beam; 2. a power cell assembly; 21. a lower box assembly; 211. a lower box body; 211b, a lower box flow channel; 212. a lower tank pipeline; 22. an upper box assembly; 221. an upper box body; 221a, a seat fixing beam; 221b, an upper box flow channel; 222. an upper tank pipeline; 23. an electric core; 231. a top cover of the battery core; 232. a pole column; 24. a battery control system; 25. a temperature sampling module; 251. an upper temperature sensor; 252. a lower temperature sensor; 3. a sealing strip; 4. an electromagnetic control valve; 5. a water inlet pipeline; 6. a water outlet pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the attached drawings of the specification, the invention provides a technical scheme that: a power cell assembly 2 comprising:
the upper box body assembly 22 comprises an upper box body 221 and an upper box side wall, the upper box body 221 is connected with the upper box side wall, and an upper box flow channel 221b for heat management is arranged inside the upper box body 221;
the lower box body assembly 21 comprises a lower box body 211 and a lower box side wall, the upper box body 221 is connected with the upper box side wall, a lower box flow passage 211b for thermal management is arranged in the lower box body 211, the end face of the lower box side wall is connected with the end face of the upper box side wall, and the upper box body 221 assembly and the lower box body assembly 21 are surrounded to form a containing cavity;
the battery pack is composed of a plurality of battery cells 23, the battery pack is arranged in the accommodating cavity, the upper surface and the lower surface of the battery pack are respectively connected with the upper box body 221 and the lower box body 211, the battery cells 23 are rectangular, and the battery cell top covers 231 are positioned on the left side and the right side of the battery cells 23;
and the battery management system 24 is arranged on the battery cell 23 at the front end of the battery pack, and the battery management system 24 is arranged on the battery cell 23 at the front end of the battery pack.
In the embodiment, the nearly flat structure of upper box body can effectively improve the travelling comfort, and the power battery assembly of platformization can effectively promote whole car battery arrangement space, reduces whole car weight, promotes whole car continuation of the journey.
Optionally, the upper tank assembly 22 further includes an upper tank pipeline 222, the upper tank pipeline 222 has an upper tank water inlet pipe and an upper tank water outlet pipe, the upper tank runner 221b has an upper runner water inlet and an upper runner water outlet, the upper tank water inlet pipe is communicated with the upper runner water inlet, and the upper tank water outlet pipe is communicated with the upper runner water outlet.
In the above embodiment, the upper tank flow channel 221b is connected to the upper tank pipeline 222 by welding, and the heat management flow channel inside the upper tank assembly can effectively improve the heat management efficiency of the power battery assembly.
Optionally, the lower tank assembly 21 further comprises a lower tank pipe 212, the lower tank pipe 212 has a lower tank water inlet pipe and a lower tank water outlet pipe, the lower tank flow passage 211b has a lower flow passage water inlet and a lower flow passage water outlet, the lower tank water inlet pipe is communicated with the lower flow passage water inlet, and the lower tank water outlet pipe is communicated with the lower flow passage water outlet.
In the above embodiment, the lower tank flow passage 211b is connected to the lower tank pipe 212 by welding. The effect is as follows: the heat management runner in the lower box assembly can effectively improve the heat management efficiency of the power battery assembly.
Optionally, a seat fixing beam 221a is disposed on the upper surface of the upper box body 221, and the seat fixing beam 221a is used for bearing a vehicle seat.
In the above embodiment, the seat fixing beam 221a on the upper portion of the upper box assembly is of a honeycomb cavity structure, so that the structural strength of the whole vehicle can be effectively improved, the collision resistance of the whole vehicle is improved, and the safety of the vehicle is improved.
Optionally, the upper box body 221 and the upper box side wall are of an integrated extrusion structure, and the material is an aluminum alloy material.
Optionally, the lower box body 211 and the lower box side wall are of an integrated extrusion structure, and the material is an aluminum alloy material.
In another aspect, a thermal management system for a power battery assembly 2 is provided, including:
the temperature sampling module 25 is connected with the battery management system 24, and half of the temperature sampling module 25 is positioned on the battery cell 23 above the battery cell top cover 231, and the other half is positioned on the battery cell 23 below the battery cell top cover 231, and is used for uniformly collecting the temperature above and below the battery pack;
the electromagnetic control valve 4, the said electromagnetic control valve 4 is connected with battery management system;
the water outlet of the whole vehicle water pump is communicated with an electromagnetic control valve 4 through the water inlet pipeline 5, and the electromagnetic control valve 4 is respectively communicated with the water inlet of the upper tank flow passage 221b and the water inlet of the lower tank flow passage 211 b; the electromagnetic control valve 4 respectively controls the water inlet pipeline 5 to be connected with the water inlet of the upper box flow passage 221b and the water inlet of the lower box flow passage 211b, and the electromagnetic control valve 4 can realize that the water inlet pipeline 5 is communicated with the water inlet of the upper box flow passage 221b or the water inlet of the lower box flow passage 211b of the power battery assembly 2 or is simultaneously communicated with the water inlet of the upper box flow passage 221b or the water inlet of the lower box flow passage 211b of the power battery assembly 2 according to a control instruction of the battery management system 24;
and the water outlet pipeline 6 is communicated with the water outlet of the upper box flow passage 221b and the water outlet of the lower box flow passage 211b through a three-way pipe.
In the above embodiment, the thermal management systems arranged at the upper part and the lower part of the power battery assembly can realize the independent control of the temperature of the upper part and the lower part of the battery, improve the uniformity of the temperature distribution of the battery, ensure the consistency of the battery and improve the service life of the battery. The structure form of the thermal management system of the patent, the arrangement mode of temperature sensor.
In yet another aspect, a vehicle is provided, including: a floor assembly 1 and any one of the power battery assemblies 2; the floor assembly 1 comprises a front engine room 11, a rear floor 12 and threshold beams 13 on the left side and the right side; the front end of power battery assembly 2 with preceding cabin 11 is connected, the power battery assembly 2 left and right sides respectively with the left and right sides threshold roof beam 13 is connected, the rear end of power battery assembly 2 with back floor 12 is connected.
In the above embodiment, the floor 1 is connected with the power battery 2 by bolts, and the specification of the bolts is M10 bolts; the integration level of the whole vehicle can be improved, the weight of the whole vehicle is reduced, and the platform design of the whole vehicle is realized by ensuring that the front engine room and the rear floor are unchanged and adjusting the wheel base of the vehicle.
Optionally, the floor assembly comprises a sealing strip 3, the floor assembly 1 is connected with the power battery assembly 2 in a sealing manner through the sealing strip 3, and the structural form of the section of the sealing strip 3 is a circular ring; the sealing interface of the rear floor 12 and the power battery assembly 2 is a plane seal.
In the embodiment, the sealing form is sealing by the sealing strip 3, and the sealing strip 3 is made of the ethylene propylene diene monomer rubber, so that the sealing effect of the bottom of the whole vehicle can be effectively improved, the wind resistance of the bottom of the vehicle is reduced, and the energy consumption of the vehicle is reduced.
In another aspect, a method for thermal management of a power battery assembly 2 is provided, which includes the following steps:
s102, respectively acquiring upper temperature information and lower temperature information of the battery cell 23;
s104, setting a temperature difference threshold value of the upper temperature and the lower temperature of the battery cell 23;
s106, the battery management system reads the temperature information and judges whether to heat or cool the battery cell 23;
s108, the battery management system sends a heating or cooling command to the whole vehicle, and the whole vehicle controller starts heating or cooling;
s110, when the battery management system judges that the battery needs to be heated or cooled, the battery management system 24 calculates whether the battery temperature difference is larger than the temperature difference threshold value;
and S112, when the temperature difference of the battery is larger than the temperature difference threshold value, controlling the electromagnetic valve to open the heat management channel of the upper box body assembly 22 or the lower box body assembly 21.
S114, when the temperature difference of the battery is smaller than the temperature difference threshold value, opening the heat management channels of the box body assembly and the lower box body assembly 21 simultaneously;
s116, the battery management system judges whether to stop heating or cooling according to the current temperature and the temperature difference of the battery cell 23;
and S118, the battery management system sends a heating stop or cooling command to the whole vehicle, and the whole vehicle stops heating or cooling.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A power cell assembly, comprising:
the upper box body assembly comprises an upper box body and an upper box side wall, the upper box body is connected with the upper box side wall, and an upper box flow passage for heat management is arranged in the upper box body;
the lower box body assembly comprises a lower box body and a lower box side wall, the upper box body is connected with the upper box side wall, a lower box flow passage for heat management is arranged in the lower box body, the end surface of the lower box side wall is connected with the end surface of the upper box side wall, and the upper box body assembly and the lower box body assembly are arranged in a surrounding mode to form an accommodating cavity;
the battery pack is composed of a plurality of battery cells, the battery pack is arranged in the accommodating cavity, the upper surface and the lower surface of the battery pack are respectively connected with the upper box body and the lower box body, the battery cells are cuboid, and the top covers of the battery cells are positioned on the left side and the right side of the battery cells;
and the battery management system is arranged on the battery cell at the front end of the battery pack.
2. The power battery assembly of claim 1, wherein the upper box assembly further comprises an upper box pipe having an upper box inlet pipe and an upper box outlet pipe, the upper box flow passage having an upper flow passage inlet and an upper flow passage outlet, the upper box inlet pipe being in communication with the upper flow passage inlet, the upper box outlet pipe being in communication with the upper flow passage outlet.
3. The power battery assembly of claim 1, wherein the lower case assembly further comprises a lower case pipe having a lower case inlet pipe and a lower case outlet pipe, the lower case flow passage having a lower flow passage inlet and a lower flow passage outlet, the lower case inlet pipe being in communication with the lower flow passage inlet, the lower case outlet pipe being in communication with the lower flow passage outlet.
4. The power battery assembly as claimed in claim 1, wherein the upper case body is provided with a seat fixing beam on an upper surface thereof, and the seat fixing beam is used for carrying a vehicle seat.
5. The power battery assembly of claim 1, wherein the upper case body and the upper case side wall are of an integral extruded structure made of aluminum alloy.
6. The power battery assembly according to claim 1, wherein the lower case body and the lower case side wall are of an integral extrusion structure and made of aluminum alloy.
7. A thermal management system for a power cell assembly, comprising:
the temperature sampling module is connected with the battery management system, and is arranged on the battery cell with half positioned above the top cover of the battery cell and the other half positioned below the top cover of the battery cell for uniformly collecting the temperature above and below the battery pack;
the electromagnetic control valve is connected with the battery management system;
the water outlet of the whole vehicle water pump is communicated with an electromagnetic control valve through the water inlet pipeline, and the electromagnetic control valve is respectively communicated with the water inlet of the upper tank runner and the water inlet of the lower tank runner; the electromagnetic control valve is used for respectively controlling the water inlet pipeline to be communicated with the water inlet of the upper box flow passage and the water inlet of the lower box flow passage, and the electromagnetic control valve can realize the communication of the water inlet pipeline with the water inlet of the upper box flow passage or the channel of the water inlet of the lower box flow passage of the power battery assembly or the simultaneous communication with the water inlet of the upper box flow passage or the channel of the water inlet of the lower box flow passage of the power battery assembly according to a control instruction of a battery management system;
and the water outlet pipeline is communicated with the water outlet of the upper box flow passage and the water outlet of the lower box flow passage through a three-way pipe.
8. A vehicle, characterized by comprising: a floor panel and a power cell assembly of any one of claims 1 to 6; the floor comprises a front engine room, a rear floor and threshold beams on the left side and the right side; the front end of the power battery assembly is connected with the front engine room, the left side and the right side of the power battery assembly are respectively connected with the threshold beams on the left side and the right side, and the rear end of the power battery assembly is connected with the rear floor.
9. The vehicle according to claim 8, characterized by comprising a sealing strip, wherein the floor and the power battery assembly are connected in a sealing manner through the sealing strip, and the cross section of the sealing strip is in a circular ring shape; the sealing interface of the rear floor and the power battery assembly is plane sealing.
10. A method for thermal management of a power cell assembly, comprising:
respectively acquiring upper temperature information and lower temperature information of the battery core;
setting a temperature difference threshold value of the upper temperature and the lower temperature of the battery cell;
the battery management system reads the temperature information and judges whether to execute heating or cooling of the battery cell;
the battery management system sends a heating or cooling command to the whole vehicle, and the whole vehicle controller starts heating or cooling;
when the battery management system judges that the battery needs to be heated or cooled, the battery control system calculates whether the battery temperature difference is greater than the temperature difference threshold value;
and when the temperature difference of the battery is greater than the temperature difference threshold value, controlling the electromagnetic valve to open the heat management channel of the upper box body assembly or the lower box body assembly.
When the temperature difference of the battery is smaller than the temperature difference threshold value, opening the heat management channels of the box body assembly and the lower box body assembly simultaneously;
the battery management system judges whether to stop heating or cooling according to the current temperature and the temperature difference of the battery core;
and the battery management system sends a heating stop or cooling command to the whole vehicle, and the whole vehicle stops heating or cooling.
CN202210732415.2A 2022-06-27 2022-06-27 Power battery assembly, thermal management system, thermal management method and vehicle Pending CN115133173A (en)

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