CN112599890A - Battery thermal management system of hybrid vehicle and hybrid vehicle - Google Patents

Battery thermal management system of hybrid vehicle and hybrid vehicle Download PDF

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Publication number
CN112599890A
CN112599890A CN202011471415.9A CN202011471415A CN112599890A CN 112599890 A CN112599890 A CN 112599890A CN 202011471415 A CN202011471415 A CN 202011471415A CN 112599890 A CN112599890 A CN 112599890A
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heat exchange
exchange medium
outlet
core
temperature
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Chinese (zh)
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张楠
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Priority to CN202011471415.9A priority Critical patent/CN112599890A/en
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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
    • 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
    • H01M10/62—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
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • 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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention discloses a battery thermal management system of a hybrid vehicle, which comprises a thermal circulation system for providing heat or cold for a power battery, wherein the thermal circulation system at least comprises a circulating pump, a battery pack heat exchanger, an engine warm core, a PTC and a controller; the engine warm core is provided with a first flow cavity for the circulation of engine cooling liquid and a second flow cavity for the circulation of a heat exchange medium in the heat circulating system and the heat exchange with the engine cooling liquid; the circulating pump, the battery pack heat exchanger, the engine warm core and the PTC are sequentially connected in series to form a heating loop; the outlet of the battery pack heat exchanger is provided with a first temperature sensor, and when the temperature measured by the first temperature sensor is not higher than a first preset temperature, the controller controls the heat exchange medium to flow through the heating loop. The invention can rapidly improve the temperature of the power battery under the low-temperature condition, and simultaneously remarkably reduces the influence of the heating process of the power battery on the endurance mileage of the whole vehicle. The invention also discloses a hybrid vehicle.

Description

Battery thermal management system of hybrid vehicle and hybrid vehicle
Technical Field
The invention relates to the technical field of battery thermal management of hybrid vehicles, in particular to a battery thermal management system of a hybrid vehicle.
Background
Hybrid vehicles mainly comprise three types at present, wherein one type takes an engine as main driving force, and a motor as auxiliary power is involved in necessary situations; the other type is that the motor is used as main driving force, and the engine is used as auxiliary power to be inserted under necessary conditions; yet another type is where the electric machine is the only source of motive power and the engine is simply the machine that powers the battery.
Although the driving types of several hybrid vehicles are different, each hybrid vehicle needs to be provided with a power battery for supplying electric energy to the motor, and the power battery needs to be in a proper temperature range to be capable of efficiently working, so that each hybrid vehicle needs to be designed with a battery thermal management system capable of enabling the temperature of the power battery to be in the proper temperature range.
At present, a battery thermal management system in a hybrid vehicle mainly heats a power battery by means of a Positive Temperature Coefficient (PTC) thermistor in a low-Temperature working environment, and although the heating effect can be achieved, the PTC heating consumes a large amount of electric energy, so that the driving range of the whole vehicle can be remarkably reduced.
Therefore, how to heat the power battery and reduce the influence on the driving range of the whole vehicle as small as possible is a technical problem that needs to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a battery thermal management system for a hybrid vehicle, so that the heating of a power battery can be realized at a low temperature, and the influence on the driving range of the vehicle can be reduced as little as possible.
Another object of the present invention is to provide a hybrid vehicle including the battery thermal management system.
In order to achieve the above object, a first aspect of the present invention provides the following solutions:
a battery thermal management system of a hybrid vehicle comprises a thermal circulation system for providing heat or cold for a power battery, wherein the thermal circulation system at least comprises a circulating pump, a battery pack heat exchanger, an engine warm core, a PTC and a controller;
wherein,
the engine warm core is provided with a first flow cavity for circulating engine cooling liquid and a second flow cavity for circulating a heat exchange medium in a heat circulating system and exchanging heat with the engine cooling liquid;
the circulating pump, the battery pack heat exchanger, the engine warm core and the PTC are sequentially connected in series to form a heating loop;
and a first temperature sensor is arranged at an outlet of the battery pack heat exchanger, and the controller controls the heat exchange medium to flow through the heating loop when the temperature measured by the first temperature sensor is not higher than a first preset temperature.
Preferably, the heat pump system further comprises a radiator, an inlet of the radiator is directly or indirectly connected with an inlet of the second flow cavity of the engine warm core in parallel, an outlet of the radiator is directly or indirectly connected with an outlet of the second flow cavity of the engine warm core in parallel, and the circulating water pump, the battery pack heat exchanger and the radiator are sequentially connected in series to form a heat dissipation loop;
when the temperature measured by the first temperature sensor is higher than the first preset temperature, the controller controls the heat exchange medium to flow through the heat dissipation loop.
Preferably, an inlet of the radiator is directly connected with an inlet of the second flow chamber of the engine warm core in parallel through a first electromagnetic valve, and an outlet of the radiator is directly connected with an outlet of the second flow chamber of the engine warm core in parallel.
Preferably, the heating loop further comprises an intermediate cooling and heating core arranged at an air inlet end of an intermediate cooling and heating core, the intermediate cooling and heating core is provided with a third flow cavity for air circulation and a fourth flow cavity for heat exchange of a heat exchange medium in the heat circulation system and the air, and an outlet of the fourth flow cavity of the intermediate cooling and heating core is connected with an inlet of the second flow cavity of the engine heating core in series;
the inlet of the radiator is connected with the inlet of a fourth flow cavity of the middle cooling and heating core in parallel through a first electromagnetic valve, and the outlet of the radiator is connected with the outlet of a second flow cavity of the engine heating core in parallel.
Preferably, a second temperature sensor is further arranged at an outlet of the second flow cavity, and the controller controls the PTC to be turned on when the temperature measured by the second temperature sensor is not higher than the first preset temperature; when the temperature measured by the second temperature sensor is higher than the first preset temperature, the controller controls the PTC to be closed.
Preferably, the heat dissipation loop further comprises a refrigeration heat exchanger arranged close to a vehicle air conditioner evaporator, the refrigeration heat exchanger is connected in series with the downstream of the radiator, and an outlet of the refrigeration heat exchanger is connected in parallel with an outlet of the second flow cavity of the engine warm core.
Preferably, the refrigeration heat exchanger further comprises a short-circuit pipeline, wherein a first end of the short-circuit pipeline is connected with an inlet of the refrigeration heat exchanger in parallel through a second electromagnetic valve, and a second end of the short-circuit pipeline is connected with an outlet of the refrigeration heat exchanger in parallel;
a third temperature sensor is arranged at an outlet of the radiator, and when the temperature measured by the third temperature sensor is not higher than a second preset temperature, the controller controls the heat exchange medium to flow through the short-circuit pipeline; when the temperature at the outlet of the radiator is higher than the second preset temperature, the controller controls the heat exchange medium to flow through the refrigeration heat exchanger.
Preferably, the first preset temperature is 15 ℃ and the second preset temperature is 25 ℃.
Preferably, the engine warm core and the intermediate cold and warm core have the same structure and comprise an inner layer pipe, an intermediate layer pipe and an outer layer pipe from inside to outside; a heat exchange medium circulation interlayer is formed between the middle-layer pipe and the inner-layer pipe, a liquid inlet interlayer is formed between the outer-layer pipe and the middle-layer pipe, and a spray head which enables the heat exchange medium to enter the heat exchange medium circulation interlayer in a spray manner is arranged between the liquid inlet interlayer and the heat exchange medium circulation interlayer; a heat exchange medium outlet is arranged in the heat exchange medium circulation interlayer;
in the engine warm core, the cavity of the inner layer pipe forms the first flow cavity, and the heat exchange medium circulation interlayer forms the second flow cavity;
in the middle cooling and heating core, the cavity of the inner layer pipe forms the third flow cavity, and the heat exchange medium circulation interlayer forms the fourth flow cavity.
Preferably, the outer wall of the inner-layer tube is also provided with pits or bulges for increasing the heat exchange area.
The hybrid vehicle disclosed by the invention comprises a power battery, and the hybrid vehicle further comprises a battery thermal management system disclosed in any one of the above.
In the battery thermal management system disclosed by the invention, a circulating pump, a battery heat exchanger, an engine warm core and a PTC are sequentially connected in series to form a heating loop, compared with the prior art, the battery thermal management system is additionally provided with the engine warm core, the engine warm core is provided with a first flow cavity for circulating engine coolant and a second flow cavity for circulating a heat exchange medium in a heat power circulation system, and in the engine warm core, the engine coolant and the heat exchange medium realize heat exchange; when the temperature at the outlet of the battery pack heat exchanger is not higher than the first preset temperature, the controller controls the heat exchange medium to flow through the heating loop for heating so as to preheat the thermal power battery through the heat exchange medium, and therefore the power battery can reach the working temperature as soon as possible.
The adoption of the engine warm core enables the heat exchange medium to fully utilize the heat in the engine cooling liquid, and the temperature of the power battery can be quickly increased under the low-temperature condition; meanwhile, the adoption of the engine warm core also enables the battery thermal management system to effectively reduce the energy consumption of the PTC, so that the influence of the heating process of the power battery on the endurance mileage of the whole vehicle is obviously reduced.
The hybrid vehicle disclosed by the invention has the corresponding technical advantages of the battery thermal management system due to the adoption of the battery thermal management system, and the details are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of a hybrid vehicle battery thermal management system as disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural view of the engine warm core and the intermediate and cold temperature cores disclosed in the embodiment of the present invention.
Wherein, 1 is the circulating pump, 2 is first solenoid valve, 3 is the second solenoid valve, 4 are the inlayer pipe, 5 are middle level pipe, 6 are outer pipe, 7 are heat transfer medium circulation intermediate layer, 8 are the feed liquor intermediate layer, 9 are the shower nozzle, 10 are the heat transfer medium export.
Detailed Description
One of the cores of the invention is to provide a battery thermal management system of a hybrid vehicle, so that the heating of a power battery can be realized at low temperature, and the influence on the driving mileage of the whole vehicle can be reduced as little as possible.
Another core of the present invention is to provide a hybrid vehicle including the battery thermal management system.
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.
The battery thermal management system of the hybrid vehicle comprises a thermal circulation system, wherein a heat exchange medium flows through the thermal circulation system and is used for providing cold or heat for a power battery of the hybrid vehicle so as to ensure that the temperature of the power battery is within a high-efficiency working range;
the heat circulating system at least comprises a circulating pump 1, a battery pack heat exchanger, an engine warm core, a PTC (positive temperature coefficient) and a controller, wherein the circulating pump 1 is used for providing circulating power for a heat exchange medium, the battery is designed to surround a power battery and has the function of enabling the heat exchange medium to transfer heat with the power battery, the engine warm core is arranged on a circulating pipeline of engine coolant, the arrangement positions of the engine warm core are more, for example, the engine warm core can be arranged close to an outlet of an engine cooling water jacket or can be arranged at the front end of a warm air heat exchanger of the engine, and the engine warm core is mainly used for enabling the heat exchange medium to exchange heat with the engine coolant, so that the heat of the engine is fully utilized to heat the power battery;
the circulating pump 1, the battery pack heat exchanger, the engine warm core and the PTC are sequentially connected in series to form a heating loop, and the engine warm core is provided with a first flow cavity for circulating engine cooling liquid and a second flow cavity for circulating a heat exchange medium in the heat power circulating system and exchanging heat with the engine cooling liquid;
the outlet of the battery pack heat exchanger is provided with a first temperature sensor, and when the temperature measured by the first temperature sensor is not higher than a first preset temperature, the controller controls the heat exchange medium to flow through the heating loop.
It should be noted that, although the circulation pump 1, the battery pack heat exchanger, the engine warm core and the PTC are connected in series to form a basic heating loop, it does not mean that the heating loop cannot include other components, and those skilled in the art will understand that the heating loop should allow the addition of other components; the first preset temperature is set according to battery performance parameters, the battery performance is different, and the first preset temperature can be adaptively adjusted, and in this embodiment, the first preset temperature is specifically 15 ℃.
In the battery thermal management system disclosed in the above embodiment, the circulating pump 1, the battery heat exchanger, the engine warm core and the PTC are sequentially connected in series to form a heating loop, and compared with the prior art, the battery thermal management system in the above embodiment is additionally provided with the engine warm core, the engine warm core is provided with a first flow cavity for flowing engine coolant and a second flow cavity for flowing heat exchange medium in the heat circulation system, and in the engine warm core, the engine coolant and the heat exchange medium realize heat exchange; when the temperature at the outlet of the battery pack heat exchanger is not higher than the first preset temperature, the controller controls the heat exchange medium to flow through the heating loop for heating so as to preheat the thermal power battery through the heat exchange medium, and therefore the power battery can reach the working temperature as soon as possible.
The adoption of the engine warm core enables the heat exchange medium to fully utilize the heat in the engine cooling liquid, and the temperature of the power battery can be quickly increased under the low-temperature condition; meanwhile, the adoption of the engine warm core also enables the battery thermal management system to effectively reduce the energy consumption of the PTC, so that the influence of the heating process of the power battery on the endurance mileage of the whole vehicle is obviously reduced.
In addition to considering the low temperature condition, in the case of an excessively high temperature, the battery thermal management system further needs to dissipate heat of a heat exchange medium, referring to fig. 1, the battery thermal management system disclosed in this embodiment further includes a radiator, an inlet of the radiator is directly or indirectly connected in parallel with an inlet of the second flow chamber of the engine warm core, an outlet of the radiator is directly or indirectly connected in parallel with an outlet of the second flow chamber of the engine warm core, and the circulating water pump, the battery pack heat exchanger, and the radiator are sequentially connected in series to form a heat dissipation loop; when the temperature measured by the first temperature sensor is higher than a first preset temperature, the controller controls the heat exchange medium to flow through the heat dissipation loop, and in the heat dissipation loop, the heat exchange medium dissipates heat to the external environment at the position of the radiator, so that the purpose of heat dissipation is achieved.
It should be noted that the radiator in the thermodynamic cycle system may be the same radiator as the radiator of the engine coolant, or may be a new radiator additionally provided.
The pipeline connection mode capable of realizing the flow direction conversion of the heat exchange medium is not limited to one, for example, a switch valve may be respectively arranged in the heating loop and the heat dissipation loop, the flow direction conversion of the heat exchange medium may be realized by controlling the switch of the switch valve by the controller, or an electromagnetic valve may be arranged at a position where the heat dissipation loop and the heating loop are connected in parallel; in the embodiment, the inlet of the radiator is directly connected with the inlet of the second flow cavity of the engine warm core in parallel through the first battery valve, and the outlet of the radiator is directly connected with the outlet of the second flow cavity of the engine warm core in parallel.
Furthermore, as shown in fig. 1, the heating circuit further includes an inter-cooling and warming core disposed at an air inlet end of the inter-cooling air cooler, the inter-cooling and warming core has a third flow chamber for air circulation and a fourth flow chamber for heat exchange with air and for circulation of a heat exchange medium in the heat circulation system, and an outlet of the fourth flow chamber of the inter-cooling and warming core is connected in series with an inlet of the second flow chamber of the engine warming core;
the inlet of the radiator is connected with the inlet of the fourth flow cavity of the middle cooling and heating core in parallel through the first electromagnetic valve 2, and the outlet of the radiator is connected with the outlet of the second flow cavity of the engine heating core in parallel.
In the hybrid vehicle with the turbocharger, air exhausted by a compressor of the turbocharger has very high temperature, so that the heat in the air can be fully utilized by the cold and warm core arranged at the air inlet end of the intercooler, the air passes through the cold and warm core and then enters the intercooler for further cooling, and in the cold and warm core, a heat exchange medium exchanges heat with the air with higher temperature to fully utilize the heat of the air at the position of the intercooler to heat the power battery, so that the aim of further reducing PTC energy consumption is fulfilled.
A second temperature sensor is arranged at the outlet of the second flow cavity, and when the temperature measured by the second temperature sensor is not higher than the first preset temperature, the temperature of the heat exchange medium heated by the medium cooling and heating core and the engine heating core is still lower, and at the moment, the power battery cannot be heated to an ideal working temperature range by the heat exchange medium, so that the PTC is controlled to be turned on by the controller to further heat the heat exchange medium; when the temperature measured by the second temperature sensor is higher than the first preset temperature, the temperature of the heat exchange medium heated by the medium cooling and heating core and the engine warm core is higher, at the moment, the heat exchange medium can heat the east-west battery to an ideal working temperature range, and therefore the controller controls the PTC to be turned off.
With reference to fig. 1, in the present embodiment, the heat dissipation loop further includes a refrigeration heat exchanger disposed close to the vehicle air conditioner evaporator, the refrigeration heat exchanger is connected in series downstream of the radiator, and an outlet of the refrigeration heat exchanger is connected in parallel with an outlet of the second flow cavity of the engine warm core.
The air conditioner evaporator of the vehicle is a position where a refrigerant in an air conditioner circulating pipeline evaporates, the temperature of the air conditioner evaporator is low, and the refrigeration heat exchanger is used for enabling heat exchange media to exchange heat with the air conditioner evaporator so as to further achieve the purpose of cooling the heat exchange media in the heat circulating system.
In a further optimized scheme, the battery thermal management system further comprises a short-circuit pipeline, as shown in fig. 1, a first end of the short-circuit pipeline is connected in parallel with an inlet of the refrigeration heat exchanger through a second electromagnetic valve 3, and a second end of the short-circuit pipeline is connected in parallel with an outlet of the refrigeration heat exchanger;
a third temperature sensor is arranged at an outlet of the radiator, and when the temperature measured by the third temperature sensor is not higher than a second preset temperature, the controller controls the heat exchange medium to flow through the short-circuit pipeline, so that the heat exchange medium bypasses the refrigeration heat exchanger; when the temperature at the outlet of the radiator is higher than a second preset temperature, the controller controls the heat exchange medium to flow through the refrigeration heat exchanger so as to further cool the heat exchange medium.
It should be noted that the second preset temperature is set according to battery performance parameters, the battery performance is different, and the second preset temperature may be adaptively adjusted, and in this embodiment, the second preset temperature is specifically 25 ℃.
Referring to fig. 2, the engine warm core and the middle cool and warm core have the same structure and sequentially comprise an inner layer pipe 4, a middle layer pipe 5 and an outer layer pipe 6 from inside to outside; a heat exchange medium circulation interlayer 7 is formed between the middle-layer pipe 5 and the inner-layer pipe 4, a liquid inlet interlayer 8 is formed between the outer-layer pipe 6 and the middle-layer pipe 5, and a spray head 9 which enables a heat exchange medium to enter the heat exchange medium circulation interlayer 7 in a spray shape is arranged between the liquid inlet interlayer 8 and the heat exchange medium circulation interlayer 7, so that jet impact heat exchange between the heat exchange medium and engine coolant is realized, and the heat exchange efficiency is improved; a heat exchange medium outlet 10 is also arranged in the heat exchange medium circulation interlayer 7;
in the engine warm core, the cavity of the inner layer pipe 4 forms a first flow cavity, and the heat exchange medium circulation interlayer 7 forms a second flow cavity;
in the middle-cooling and heating core, the cavity of the inner-layer pipe 4 forms a third flow cavity, and the heat exchange medium circulation interlayer 7 forms a fourth flow cavity.
It should be noted that, the arrangement position, arrangement form and number of the nozzles in the engine warm core and the intermediate cooling and heating core can be adjusted adaptively, and the arrangement form of the nozzles in the drawings is only illustrative and should not be construed as limiting the range of the arrangement form of the nozzles.
In order to further improve the heat exchange efficiency between the heat exchange medium and the engine coolant, pits or bulges can be arranged on the outer wall of the inner-layer pipe 4 to increase the heat exchange area.
Besides, the embodiment of the invention also discloses a hybrid vehicle which comprises a power battery and is provided with the battery thermal management system disclosed in any one of the above items.
Due to the adoption of the battery thermal management system, the hybrid vehicle has the corresponding technical advantages of the battery thermal management system, and a person skilled in the art can understand the hybrid vehicle by referring to the description in the embodiment, which is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The battery thermal management system of the hybrid vehicle is characterized by comprising a thermal circulation system for providing heat or cold for a power battery, wherein the thermal circulation system at least comprises a circulating pump (1), a battery pack heat exchanger, an engine warm core, a PTC and a controller;
wherein,
the engine warm core is provided with a first flow cavity for circulating engine cooling liquid and a second flow cavity for circulating a heat exchange medium in a heat circulating system and exchanging heat with the engine cooling liquid;
the circulating pump (1), the battery pack heat exchanger, the engine warm core and the PTC are sequentially connected in series to form a heating loop;
and a first temperature sensor is arranged at an outlet of the battery pack heat exchanger, and the controller controls the heat exchange medium to flow through the heating loop when the temperature measured by the first temperature sensor is not higher than a first preset temperature.
2. The battery thermal management system according to claim 1, further comprising a radiator, wherein an inlet of the radiator is directly or indirectly connected in parallel with an inlet of the second flow chamber of the engine warm core, an outlet of the radiator is directly or indirectly connected in parallel with an outlet of the second flow chamber of the engine warm core, and the circulating water pump, the battery pack heat exchanger and the radiator are sequentially connected in series to form a heat dissipation loop;
when the temperature measured by the first temperature sensor is higher than the first preset temperature, the controller controls the heat exchange medium to flow through the heat dissipation loop.
3. The battery thermal management system according to claim 2, characterized in that the inlet of the radiator is directly connected in parallel with the inlet of the second flow chamber of the engine warm core by a first solenoid valve (2), and the outlet is directly connected in parallel with the outlet of the second flow chamber of the engine warm core.
4. The battery thermal management system according to claim 2, further comprising an intermediate cooling and warming core disposed at an air inlet end of an intermediate cooling and warming core, wherein the intermediate cooling and warming core has a third flow chamber for circulating air and a fourth flow chamber for circulating a heat exchange medium in a heat circulation system and exchanging heat with air, and an outlet of the fourth flow chamber of the intermediate cooling and warming core is connected in series with an inlet of the second flow chamber of the engine warming core;
the inlet of the radiator is connected with the inlet of a fourth flow cavity of the middle cooling and heating core in parallel through a first electromagnetic valve (2), and the outlet of the radiator is connected with the outlet of a second flow cavity of the engine heating core in parallel.
5. The battery thermal management system according to claim 4, wherein a second temperature sensor is further disposed at an outlet of the second flow chamber, and the controller controls the PTC to be turned on when a temperature measured by the second temperature sensor is not higher than the first preset temperature; when the temperature measured by the second temperature sensor is higher than the first preset temperature, the controller controls the PTC to be closed.
6. The battery thermal management system of claim 5, further comprising a refrigeration heat exchanger disposed proximate to a vehicle air conditioner evaporator, the refrigeration heat exchanger being connected in series downstream of the radiator, and an outlet of the refrigeration heat exchanger being connected in parallel with an outlet of the second flow chamber of the engine warm core.
7. The battery thermal management system of claim 6,
the first end of the short-circuit pipeline is connected with the inlet of the refrigeration heat exchanger in parallel through a second electromagnetic valve (3), and the second end of the short-circuit pipeline is connected with the outlet of the refrigeration heat exchanger in parallel;
a third temperature sensor is arranged at an outlet of the radiator, and when the temperature measured by the third temperature sensor is not higher than a second preset temperature, the controller controls the heat exchange medium to flow through the short-circuit pipeline; when the temperature at the outlet of the radiator is higher than the second preset temperature, the controller controls the heat exchange medium to flow through the refrigeration heat exchanger.
8. The battery thermal management system of claim 7, wherein the first predetermined temperature is 15 ℃ and the second predetermined temperature is 25 ℃.
9. The battery thermal management system according to claim 4, wherein the engine warm core and the intermediate cooling and heating core are of the same structure and comprise an inner layer pipe (4), an intermediate layer pipe (5) and an outer layer pipe (6) from inside to outside; a heat exchange medium circulation interlayer (7) is formed between the middle-layer pipe (5) and the inner-layer pipe (4), a liquid inlet interlayer (8) is formed between the outer-layer pipe (6) and the middle-layer pipe (5), and a spray head (9) for enabling the heat exchange medium to enter the heat exchange medium circulation interlayer (7) in a spray manner is arranged between the liquid inlet interlayer (8) and the heat exchange medium circulation interlayer (7); a heat exchange medium outlet (10) is arranged in the heat exchange medium circulation interlayer (7);
in the engine warm core, the cavity of the inner layer pipe (4) forms the first flow cavity, and the heat exchange medium circulation interlayer (7) forms the second flow cavity;
in the middle cooling and heating core, the cavity of the inner layer pipe (4) forms the third flow cavity, and the heat exchange medium circulation interlayer (7) forms the fourth flow cavity.
10. A hybrid vehicle comprising a power cell, characterized in that it further comprises a battery thermal management system as disclosed in any one of claims 1 to 9.
CN202011471415.9A 2020-12-14 2020-12-14 Battery thermal management system of hybrid vehicle and hybrid vehicle Pending CN112599890A (en)

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Application publication date: 20210402