CN113471573B - Power battery thermal management method and system and automobile - Google Patents
Power battery thermal management method and system and automobile Download PDFInfo
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- CN113471573B CN113471573B CN202110853269.4A CN202110853269A CN113471573B CN 113471573 B CN113471573 B CN 113471573B CN 202110853269 A CN202110853269 A CN 202110853269A CN 113471573 B CN113471573 B CN 113471573B
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- 238000007726 management method Methods 0.000 title claims abstract description 77
- 238000006243 chemical reaction Methods 0.000 claims abstract description 106
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000013021 overheating Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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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
- H01M10/42—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
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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
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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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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- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a power battery thermal management method, which comprises the following steps: connecting the power battery heat exchange device and the power module heat exchange device in series, and changing the sequence of connecting the power battery power module heat exchange device and the battery heat exchange device in series through the conversion device; the method comprises the steps of obtaining the temperature of a battery core of a battery pack in the power battery, controlling a heating component in a power module to work when the temperature of the battery core is smaller than a first preset temperature t1, enabling a heat exchange medium to flow through a heat exchange device of the power module firstly, taking away the heat of the power module, and then flowing through the heat exchange device of the battery to heat the battery core. The invention further provides a power battery thermal management system and an automobile. The invention can effectively utilize the heat in the power module of the power battery and prevent the components in the power module from being overheated to reduce the service life of the power module.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a power battery thermal management method and system and an automobile.
Background
The power lithium battery is an energy source of the electric automobile, and the battery can generate certain heat in the charging and discharging process, so that the temperature is increased, and the temperature increase can influence many working characteristic parameters of the battery, such as internal resistance, voltage, SOC, available capacity, charging and discharging efficiency and the service life of the battery. The thermal effect problem of the battery also influences the performance and the cycle life of the whole vehicle, so that the thermal management is very important for the performance and the service life of the battery to the driving mileage of the whole vehicle.
A traditional power battery thermal management system heats or refrigerates a battery core through a heat exchange device, a power module in the power battery system has no heat exchange device thermal management design, and the power module comprises a power battery distribution module, an OBC/DCDC (power supply charging of a power battery/power supply charging of a low-voltage battery) two-in-one system and the like.
The other traditional power battery heat management system heats or refrigerates the battery cell through the heat exchange device, the power module in the power battery system is provided with the heat exchange device heat management design, and the power module heat exchange device and the battery cell heat exchange device adopt a parallel connection mode. However, when the battery core has a low operating temperature and needs to be heated, the heat in the power supply module of the power battery adopting the parallel connection mode cannot be effectively utilized.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide a power battery heat management method, a power battery heat management system and an automobile, so that heat in a power module of a power battery is effectively utilized, and the service life of the power module is prevented from being shortened due to overheating of components in the power module.
The invention firstly provides a power battery thermal management method, which comprises the following steps: connecting the power battery heat exchange device and the power module heat exchange device in series, and changing the sequence of connecting the power battery power module heat exchange device and the battery heat exchange device in series through the conversion device; the method comprises the steps of obtaining the temperature of a battery core of a battery pack in the power battery, controlling a heating component in a power module to work when the temperature of the battery core is smaller than a first preset temperature t1, enabling a heat exchange medium to flow through a heat exchange device of the power module firstly, taking away the heat of the power module, and then flowing through the heat exchange device of the battery to heat the battery core.
Further, the method further comprises: when the temperature range of the battery core is from a first preset temperature t1 to a second preset temperature t2, controlling a heating component in the power module to stop working, so that a heat exchange medium firstly flows through a heat exchange device of the power module to take away heat of the power module, and then flows through a heat exchange device of the battery to heat the battery core; when the operation temperature of the battery core of the battery pack is higher than a third preset temperature t3, enabling a heat exchange medium to flow through the battery heat exchange device firstly and then flow through the power supply module heat exchange device to refrigerate the battery core; when the battery core operation temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power module is higher than a fourth preset temperature t4, the heat exchange medium firstly flows through the heat exchange device of the power module to take away the heat of the power module, and then flows through the conversion device to directly return to the whole vehicle heat management system to refrigerate the power module; when the battery core operation temperature range of the battery pack is between the second preset temperature t2 and the third preset temperature t3 and the temperature of the power module is smaller than or equal to the fourth preset temperature t4, the battery pack system informs the whole vehicle thermal management system of no thermal management requirement.
The invention further provides a power battery thermal management system, which is connected with a power module, a battery cell of a battery pack and a vehicle thermal management system, and comprises: the power module heat exchange device is connected with the power module and exchanges heat with the heating element in the power module; the battery heat exchange device is connected with the power supply module heat exchange device in series and is connected with the battery core to exchange heat with the battery core; the conversion device is connected with the power module heat exchange device and the battery heat exchange device, so that the heat exchange medium only flows through the power module heat exchange device, or the heat exchange medium simultaneously flows through the power module heat exchange device and the battery heat exchange device; and the battery manager detects the temperatures of the inlets and outlets of the power supply module heat exchange device, the battery heat exchange device and the conversion device, so that the heat management system of the whole vehicle adjusts the temperature of the heat exchange medium and adjusts the working state of the conversion device.
Optionally, the conversion device is a four-way reversing valve and comprises a first interface, a second interface, a third interface and a fourth interface, the conversion device is connected between the power module heat exchange device and the battery heat exchange device, the first interface of the conversion device is connected with a water outlet of the power module heat exchange device, the second interface is connected with the whole vehicle heat management system, and the third interface and the fourth interface are connected with the battery heat exchange device.
Optionally, when the battery manager detects that the temperature of the battery core of the battery pack is lower than a first preset temperature t1, the battery manager controls the heating element in the power module to work, the battery manager controls the conversion device to switch to the state S1, namely, the third interface of the conversion device is an outlet, the fourth interface is an inlet, at this time, the heat exchange medium firstly flows through the heat exchange device of the power module, takes away the heat of the power module, and then flows through the heat exchange device of the battery to heat the battery core.
Optionally, when the battery manager detects that the operating temperature range of the battery core of the battery pack is from a first preset temperature t1 to a second preset temperature t2, the battery manager controls a heating component in the power module to stop working, the battery manager controls the conversion device to switch to a state S1, namely, a third interface of the conversion device is an outlet, a fourth interface of the conversion device is an inlet, and at the moment, the heat exchange medium firstly flows through the heat exchange device of the power module to take away heat of the power module, and then flows through the heat exchange device of the battery to heat the battery core; when the battery manager detects that the operation temperature of the battery core of the battery pack is higher than a third preset temperature t3, the battery manager controls the conversion device to be switched to a state S2, namely the third interface of the conversion device is an inlet, the fourth interface of the conversion device is an outlet, and at the moment, the heat exchange medium firstly flows through the battery heat exchange device and then flows through the power supply module heat exchange device to refrigerate the battery core; when the battery manager detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3, and the temperature of the power module is greater than a fourth preset temperature t4, the battery manager controls the conversion device to be switched to a state S3, namely, a third interface and a fourth interface at the rear end of the conversion device are both closed, a heat exchange medium enters the conversion device from the first interface at the front end and then flows out from the second interface at the front end, at the moment, the heat exchange medium firstly flows through the heat exchange device of the power module to take away the heat of the power module, then flows through the conversion device and directly returns to the heat management system of the whole vehicle, and the power module is refrigerated; when the battery manager detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power supply module is less than or equal to a fourth preset temperature t4, the battery manager informs the whole vehicle thermal management system that the battery system has no thermal management requirement.
Optionally, the conversion device is a four-way reversing valve and comprises a first interface, a second interface, a third interface and a fourth interface, the conversion device is connected to one side of the power module heat exchange device and one side of the battery heat exchange device, the first interface and the second interface of the conversion device are connected with the whole vehicle heat management system, the third interface is connected with the power module heat exchange device, and the fourth interface is connected with the battery heat exchange device.
Optionally, when the battery manager detects that the temperature of the battery core of the battery pack is lower than a first preset temperature t1, the battery manager controls the heating element in the power module to work, the battery manager controls the conversion device to switch to the state S1, namely, the third interface of the conversion device is an outlet, the fourth interface is an inlet, at this time, the heat exchange medium firstly flows through the heat exchange device of the power module, takes away the heat of the power module, and then flows through the heat exchange device of the battery to heat the battery core.
Optionally, when the battery manager detects that the operating temperature range of the battery core of the battery pack is from a first preset temperature t1 to a second preset temperature t2, the battery manager controls a heating component in the power module to stop working, the battery manager controls the conversion device to switch to a state S1, namely, a third interface of the conversion device is an outlet, a fourth interface of the conversion device is an inlet, and at the moment, the heat exchange medium firstly flows through the heat exchange device of the power module to take away heat of the power module, and then flows through the heat exchange device of the battery to heat the battery core; when the battery manager detects that the operation temperature of the battery core of the battery pack is higher than a third preset temperature t3, the battery manager controls the conversion device to be switched to a state S2, namely the third interface of the conversion device is an inlet, the fourth interface of the conversion device is an outlet, and at the moment, the heat exchange medium firstly flows through the battery heat exchange device and then flows through the power supply module heat exchange device to refrigerate the battery core; when the battery manager detects that the battery core operation temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power supply module is greater than a fourth preset temperature t4, the battery manager controls the conversion device to be switched to a state S2, namely, a third interface at the rear end of the conversion device is an inlet, a fourth interface is an outlet, and at the moment, a heat exchange medium flows through the battery heat exchange device firstly and then flows through the power supply module heat exchange device to refrigerate the battery core; when the battery manager detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power supply module is less than or equal to a fourth preset temperature t4, the battery manager controls the conversion device to switch to a state S3, namely, the third interface and the fourth interface of the conversion device are both closed, the heat exchange medium enters the conversion device from the first interface and then flows out from the second interface, and at the moment, the heat exchange medium does not flow through the power battery thermal management system.
The invention finally provides an automobile which is provided with the power battery thermal management system.
According to the power battery heat management method, the power battery heat management system and the automobile, heat in the power module of the power battery can be effectively utilized, and the service life of the power module is prevented from being reduced due to overheating of components in the power module.
Drawings
Fig. 1 is a schematic structural view of a power battery system in a first embodiment of the invention.
Fig. 2 shows 3 operating states of the switching device according to the invention.
FIG. 3 is a schematic structural diagram of a power battery system in a second embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order; the terms "front", "back", 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 the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The invention firstly provides a power battery thermal management method, which comprises the following steps: connecting the power battery heat exchange device and the power module heat exchange device in series, and changing the sequence of connecting the power battery power module heat exchange device and the battery heat exchange device in series through the conversion device; the method comprises the steps of obtaining the temperature of an electric core of a battery pack in the power battery, controlling a heating component in a power module to work when the temperature of the electric core is smaller than a first preset temperature t1, enabling a heat exchange medium to flow through a heat exchange device of the power module firstly, taking away the heat of the power module, and then flowing through the heat exchange device of the battery to heat the electric core. The heat generating component may be a PTC (Positive Temperature Coefficient) heater, for example. The switching device may be, for example, a four-way reversing valve.
The above method may further comprise the steps of: when the temperature range of the battery core is from a first preset temperature t1 to a second preset temperature t2, controlling a heating component in the power module to stop working, so that a heat exchange medium firstly flows through a heat exchange device of the power module to take away heat of the power module, and then flows through a heat exchange device of the battery to heat the battery core; when the battery manager detects that the battery core operation temperature of the battery pack is higher than a third preset temperature t3, the heat exchange medium flows through the battery heat exchange device firstly and then flows through the power supply module heat exchange device 20 to refrigerate the battery core; when the battery core operation temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power module is higher than a fourth preset temperature t4, the heat exchange medium firstly flows through the heat exchange device of the power module to take away the heat of the power module, and then flows through the conversion device to directly return to the whole vehicle heat management system to refrigerate the power module; when the battery core operation temperature range of the battery pack is between the second preset temperature t2 and the third preset temperature t3 and the temperature of the power supply module is less than or equal to the fourth preset temperature t4, the battery manager informs the whole vehicle thermal management system of no thermal management requirement of the battery system.
The method for carrying out the thermal management on the power battery is characterized in that the power battery Chi Dianyuan module heat exchange device and the battery heat exchange device are connected in series, and the sequence of the power battery power supply module heat exchange device and the battery heat exchange device which are connected in series is changed through the conversion device. When the battery core is low in operation temperature and needs to be heated, the conversion device is controlled to enable the heat exchange medium to flow through the power battery power module heat exchange device firstly to absorb heat of the power module and then flow through the battery heat exchange device to heat the battery, and therefore heat in the power battery power module is effectively utilized. When the operation temperature of the battery core is within a reasonable range and the temperature of the power battery power module is high and heat is required to be dissipated, the conversion device is controlled to enable heat exchange media to only flow through the heat exchange device of the power battery power module without flowing through the battery heat exchange device to reduce flow resistance, so that the power battery power module is effectively dissipated, the loading capacity of the power battery power module is increased, and the service life of the power module is prevented from being reduced due to overheating of components in the power module.
The present invention provides a thermal management system for a power battery according to the above method, please refer to fig. 1, which is connected to a power module, a battery cell of a battery pack, and a vehicle thermal management system, and includes: power module heat exchange device 20, battery heat exchange device 40, conversion device 60, and battery manager 80.
The power module heat exchange device 20 is connected to the power module and exchanges heat with the heating components in the power module. Power module heat transfer device 20 can be the platelike, is responsible for carrying out the heat exchange with the interior heating element device of power module, and power module includes one or more combinations such as distribution module, DCDC, OBC, PTC heater, and the interior heating element device of power module includes power electron device, inductance, pre-charge resistance, relay, fuse, electric capacity, overflows copper bar, PTC etc.. The battery heat exchange device 40 is connected in series with the power module heat exchange device 20 and connected with the battery core to exchange heat with the battery core, and the battery heat exchange device 40 is preferably plate-shaped. The conversion device 60 is connected to the power module heat exchange device 20 and the battery heat exchange device 40, so that the heat exchange medium flows through only the power module heat exchange device 20, or the heat exchange medium flows through both the power module heat exchange device 20 and the battery heat exchange device 40. And the battery manager 80 detects the temperatures of the inlet and the outlet of the power module heat exchange device 20, the battery heat exchange device 40 and the conversion device 60, so that the heat management system of the whole vehicle adjusts the temperature of the heat exchange medium, and adjusts the working state of the conversion device 60 according to the power battery management method. Specifically, the battery manager 80 is responsible for detecting the temperatures of the front end or the rear end of the conversion device through the temperature probes T1 to T8, and when the battery manager detects that the temperature difference between the front end and the rear end is large, the battery manager can inform the vehicle controller of controlling and adjusting the temperature of the refrigerant. Battery manager 80 is also responsible for detecting the temperature of power module heat exchange device 20 or components within the power module, and when the power module temperature exceeds a threshold value, cooling needs to be initiated to prevent overheating of the power module, damage to the device or reduction in the life of the device. Battery manager 80 is responsible for detecting the temperature of the front and rear interfaces of power module heat exchange device 20 to monitor the temperature difference and adjust the temperature of the refrigerant. Battery manager 80 is also responsible for detecting the temperature of the battery heat exchange device or the electrical core to monitor whether the electrical core is operating within a reasonable temperature range, and if so, heating is turned on, and if so, cooling is turned on, or the operating state of switching device 60 is confirmed. Battery manager 80 is also responsible for detecting the temperature of the front and rear interfaces of the battery heat exchanger to confirm the cooling effect of the battery, thereby adjusting the coolant temperature or switching the device state. Meanwhile, battery manager 80 is also responsible for controlling switching apparatus 60 to switch the ingress and egress states of rear-end third interface 3 and fourth interface 4.
Referring to fig. 2, the conversion device 60 is a four-way reversing valve, and includes a first interface 1, a second interface 2, a third interface 3, and a fourth interface 4, where the first interface 1 and the second interface 2 are connected to the entire vehicle thermal management system, the third interface 3 is connected to the power module heat exchange device 20, and the fourth interface 4 is connected to the battery heat exchange device. The first interface 1 receives a heat exchange medium from a finished automobile heat management system, the second interface 2 outputs the heat exchange medium to the finished automobile heat management system, and the third interface 3 and the fourth interface 4 are respectively closed or are set as an inlet or an outlet in different working states. The switching device 60 has 3 operating states, indicated as S1, S2, S3 in the figure.
Referring to fig. 1 again, in the embodiment shown in fig. 1, the conversion device 60 is connected between the power module heat exchange device 20 and the battery heat exchange device 40, the first interface 1 of the conversion device is connected to the water outlet 24 of the power module heat exchange device 20, the second interface 2 is connected to the vehicle thermal management system, and the third interface 3 and the fourth interface 4 are connected to the battery heat exchange device 40.
When the battery manager 80 detects that the temperature of the battery cell of the battery pack is lower than a first preset temperature t1, the battery manager 80 controls a heating component in the power module to work, for example, controls a PTC heater in the power module to work, the battery manager 80 controls the conversion device 60 to switch to a state S1, namely, the third interface 3 of the conversion device 60 is an outlet, the fourth interface 4 is an inlet, at the moment, the heat exchange medium firstly flows through the power module heat exchange device 20 to take away the heat of the power module, and then flows through the battery heat exchange device 40 to heat the battery cell.
When the battery manager 80 detects that the battery core operation temperature range of the battery pack is from a first preset temperature t1 to a second preset temperature t2, the battery manager 80 controls the PTC heater in the power module to stop working, the battery manager 80 controls the conversion device 60 to switch to the state S1, namely, the third interface 3 of the conversion device 60 is an outlet, the fourth interface 4 is an inlet, and at the moment, the heat exchange medium firstly flows through the power module heat exchange device 20 to take away the heat of the power module, and then flows through the battery heat exchange device 40 to heat the battery core.
When battery manager 80 detects that the battery core operating temperature of the battery pack is greater than a third preset temperature t3, battery manager 80 controls conversion device 60 to switch to state S2, that is, third interface 3 of conversion device 60 is an inlet, and fourth interface 4 is an outlet, at this time, the heat exchange medium flows through battery heat exchange device 40 first, then flows through power module heat exchange device 20, and cools the battery core.
When the battery manager 80 detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3, and the temperature of the power supply module is greater than a fourth preset temperature t4, the battery manager 80 controls the conversion device 60 to switch to the state S3, namely, the third interface 3 and the fourth interface 4 at the rear end of the conversion device 60 are both closed, the heat exchange medium enters the conversion device 60 from the first interface 1 at the front end and then flows out from the second interface 2 at the front end, at the moment, the heat exchange medium firstly flows through the heat exchange device 20 of the power supply module, the heat of the power supply module flows through the conversion device 60 and then directly returns to the whole vehicle heat management system, and the power supply module is cooled.
When the battery manager 80 detects that the battery core operating temperature range of the battery pack is from the second preset temperature t2 to the third preset temperature t3 and the temperature of the power supply module is less than or equal to the fourth preset temperature t4, the battery manager 80 informs the entire vehicle thermal management system that the battery system has no thermal management requirement.
Referring to fig. 3, in another power battery management system provided by the present application, a conversion device 60 is connected to one side of a power module heat exchange device 20 and a battery heat exchange device 40, a first interface 1 and a second interface 2 of the conversion device are connected to a vehicle heat management system, a third interface 3 is connected to the power module heat exchange device, and a fourth interface 4 is connected to the battery heat exchange device 40. In operation, it differs from the first embodiment in that: when the battery manager 80 detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power module is greater than a fourth preset temperature t4, the battery manager 80 controls the conversion device 60 to be switched to a state S2, namely, the third interface 3 at the rear end of the conversion device 60 is an inlet and the fourth interface 4 is an outlet, at the moment, the heat exchange medium firstly flows through the battery heat exchange device 40 and then flows through the power module heat exchange device 20 to refrigerate the battery core; when the battery manager 80 detects that the battery core operating temperature range of the battery pack is from the second preset temperature t2 to the third preset temperature t3, and the temperature of the power module is less than or equal to the fourth preset temperature t4, the battery manager 80 controls the conversion device 60 to switch to the state S3, namely, the third interface 3 and the fourth interface 4 of the conversion device 60 are both closed, the heat exchange medium enters the conversion device 60 from the first interface 1 and then flows out from the second interface 2, and at this time, the heat exchange medium does not flow through the power battery thermal management system.
That is, the operation process of the power battery management system shown in fig. 3 is:
when the battery manager 80 detects that the temperature of the battery core of the battery pack is lower than a first preset temperature t1, the battery manager 80 controls a heating component in the power module to work, the battery manager 80 controls the conversion device 60 to be switched to a state S1, namely, the third interface 3 of the conversion device 60 is an outlet, the fourth interface 4 is an inlet, and at the moment, the heat exchange medium firstly flows through the power module heat exchange device 20 to take away the heat of the power module and then flows through the battery heat exchange device 40 to heat the battery core;
when the battery manager 80 detects that the battery core operation temperature range of the battery pack is from a first preset temperature t1 to a second preset temperature t2, the battery manager 80 controls heating components in the power module to stop working, the battery manager 80 controls the conversion device 60 to be switched to a state S1, namely, the third interface 3 of the conversion device 60 is an outlet, the fourth interface 4 is an inlet, and at the moment, the heat exchange medium firstly flows through the power module heat exchange device 20 to take away heat of the power module and then flows through the battery heat exchange device 40 to heat the battery core;
when the battery manager 80 detects that the operation temperature of the battery cell of the battery pack is higher than a third preset temperature t3, the battery manager 80 controls the conversion device 60 to be switched to a state S2, namely, the third interface 3 of the conversion device 60 is an inlet, and the fourth interface 4 is an outlet, at this time, the heat exchange medium flows through the battery heat exchange device 40 first and then flows through the power module heat exchange device 20, and the battery cell is refrigerated;
when the battery manager 80 detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power module is greater than a fourth preset temperature t4, the battery manager 80 controls the conversion device 60 to be switched to a state S2, namely, the third interface 3 at the rear end of the conversion device 60 is an inlet and the fourth interface 4 is an outlet, at the moment, the heat exchange medium firstly flows through the battery heat exchange device 40 and then flows through the power module heat exchange device 20 to refrigerate the battery core;
when the battery manager 80 detects that the battery core operating temperature range of the battery pack is from the second preset temperature t2 to the third preset temperature t3, and the temperature of the power module is less than or equal to the fourth preset temperature t4, the battery manager 80 controls the conversion device 60 to switch to the state S3, namely, the third interface 3 and the fourth interface 4 of the conversion device 60 are both closed, the heat exchange medium enters the conversion device 60 from the first interface 1 and then flows out from the second interface 2, and at this time, the heat exchange medium does not flow through the power battery thermal management system.
In addition, compared with the power battery management system shown in fig. 2, the power battery management system shown in fig. 3 has the advantage that the conversion device 60 is connected to one side of the power module heat exchange device 20 and one side of the battery heat exchange device 40, so that when the power module heat exchange device 20 and the battery heat exchange device 40 do not need heat exchange, a heat exchange medium can directly flow out through the second interface 2 after flowing in from the first interface 1, and the flow resistance of the heat exchange medium is reduced. In contrast, in the power battery management system shown in fig. 2, the conversion device 60 is connected between the power module heat exchanging device 20 and the battery heat exchanging device 40, so that only the power module is cooled when the power module is overheated.
The application also provides an automobile which is provided with any one of the power battery thermal management systems.
In summary, the power battery power module heat exchange device and the battery heat exchange device are connected in series, and the sequence of the power battery power module heat exchange device and the battery heat exchange device which are connected in series is changed through the four-way reversing valve conversion device. When the battery core is low in operation temperature and needs to be heated, the conversion device is controlled to enable the heat exchange medium to flow through the power battery power module heat exchange device firstly to absorb heat of the power module and then flow through the battery heat exchange device to heat the battery, and therefore heat in the power battery power module is effectively utilized. When the operation temperature of the battery core is within a reasonable range and the power battery power module is high in temperature and needs heat dissipation, the heat exchange medium only flows through the heat exchange device of the power battery power module through the control conversion device, the flow resistance is not required to be reduced through the battery heat exchange device, the power battery power module is effectively cooled, the loading capacity of the power battery power module is increased, and the service life of the power module is prevented from being reduced due to overheating of components in the power module.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A power battery thermal management method is characterized by comprising the following steps:
the battery heat exchange device is connected with the power module heat exchange device in series, and the sequence of the serial connection of the power module heat exchange device and the battery heat exchange device is changed through the conversion device;
the method comprises the steps of obtaining the temperature of a battery core of a battery pack in the power battery, and controlling a heating element in a power module to work when the temperature of the battery core is lower than a first preset temperature t1, so that a heat exchange medium firstly flows through a heat exchange device of the power module to take away the heat of the power module, and then flows through the heat exchange device of the battery to heat the battery core;
when the temperature range of the battery core is from a first preset temperature t1 to a second preset temperature t2, controlling heating components in the power module to stop working, so that a heat exchange medium firstly flows through the power module heat exchange device to take away heat of the power module, and then flows through the battery heat exchange device to heat the battery core;
when the battery core operation temperature of the battery pack is higher than a third preset temperature t3, enabling the heat exchange medium to flow through the battery heat exchange device firstly and then flow through the power module heat exchange device, and refrigerating the battery core;
when the battery core operation temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3, and the temperature of the power module is higher than a fourth preset temperature t4, the heat exchange medium firstly flows through the power module heat exchange device to take away the heat of the power module, then flows through the conversion device and directly returns to the whole vehicle heat management system to refrigerate the power module;
when the battery core operating temperature range of the battery pack is between the second preset temperature t2 and the third preset temperature t3, and the temperature of the power supply module is less than or equal to the fourth preset temperature t4, the battery system of the whole vehicle thermal management system is informed of no thermal management requirement.
2. The utility model provides a power battery thermal management system, is connected with the electric core of power module, battery package and whole car thermal management system, its characterized in that includes:
the power module heat exchange device (20) is connected with the power module and exchanges heat with a heating element in the power module;
the battery heat exchange device (40) is connected with the power supply module heat exchange device (20) in series and is connected with the battery core to exchange heat with the battery core;
a conversion device (60) connected with the power module heat exchange device (20) and the battery heat exchange device (40) to enable the heat exchange medium to flow through the power module heat exchange device (20) only or to enable the heat exchange medium to flow through the power module heat exchange device (20) and the battery heat exchange device (40) simultaneously;
the battery manager (80) is used for detecting the temperatures of inlets and outlets of the power module heat exchange device (20), the battery heat exchange device (40) and the conversion device (60), so that the whole vehicle heat management system adjusts the temperature of the heat exchange medium and adjusts the working state of the conversion device (60);
when the battery manager (80) detects that the temperature range of the battery core is from a first preset temperature t1 to a second preset temperature t2, the heating components in the power supply module are controlled to stop working, so that the heat exchange medium firstly flows through the heat exchange device of the power supply module to take away the heat of the power supply module, and then flows through the heat exchange device of the battery to heat the battery core;
when the battery manager (80) detects that the battery core operation temperature of the battery pack is higher than a third preset temperature t3, the heat exchange medium flows through the battery heat exchange device firstly and then flows through the power supply module heat exchange device to refrigerate the battery core;
when the battery manager (80) detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3, and the temperature of the power supply module is higher than a fourth preset temperature t4, the heat exchange medium firstly flows through the power supply module heat exchange device to take away the heat of the power supply module, then flows through the conversion device and directly returns to the whole vehicle heat management system, and the power supply module is refrigerated;
when the battery manager (80) detects that the battery core operating temperature range of the battery pack is between a second preset temperature t2 and a third preset temperature t3, and the temperature of the power supply module is smaller than or equal to a fourth preset temperature t4, the battery management system informs the whole vehicle thermal management system of no thermal management requirement.
3. The power cell thermal management system of claim 2, wherein:
conversion equipment (60) is the four-way reversing valve, including first interface (1), second interface (2), third interface (3) and fourth interface (4), conversion equipment (60) connect in power module heat transfer device (20) with between battery heat transfer device (40), conversion equipment (60) first interface (1) is connected the delivery port (24) of power module heat transfer device (20), whole car thermal management system is connected in second interface (2), third interface (3) with fourth interface (4) are connected battery heat transfer device (40).
4. The power cell thermal management system of claim 3, wherein:
when the battery manager (80) detects that the temperature of the battery core of the battery pack is lower than a first preset temperature t1, the battery manager (80) controls a heating component in the power module to work, the battery manager (80) controls the conversion device (60) to be switched to the state S1, namely, the third interface (3) is an outlet, the fourth interface (4) is an inlet, and at the moment, a heat exchange medium firstly flows through the power module heat exchange device (20), takes away the heat of the power module, and then flows through the battery heat exchange device (40) to heat the battery core.
5. The power cell thermal management system of claim 4, wherein:
when the battery manager (80) detects that the battery core operation temperature range of the battery pack is from a first preset temperature t1 to a second preset temperature t2, the battery manager (80) controls heating components in the power module to stop working, the battery manager (80) controls the conversion device (60) to switch to a state S1, namely the third interface (3) is an outlet, the fourth interface (4) is an inlet, and at the moment, the heat exchange medium firstly flows through the power module heat exchange device (20) to take heat away from the power module and then flows through the battery heat exchange device (40) to heat the battery core;
when the battery manager (80) detects that the battery core operation temperature of the battery pack is higher than a third preset temperature t3, the battery manager (80) controls the conversion device (60) to switch to a state S2, namely the third interface (3) is an inlet, the fourth interface (4) is an outlet, and at the moment, the heat exchange medium flows through the battery heat exchange device (40) firstly and then flows through the power supply module heat exchange device (20) to refrigerate the battery core;
when the battery manager (80) detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3, and the temperature of the power supply module is greater than a fourth preset temperature t4, the battery manager (80) controls the conversion device (60) to be switched to a state S3, namely, the third interface (3) and the fourth interface (4) are closed, a heat exchange medium enters the conversion device (60) from the first interface (1) and then flows out from the second interface (2), at the moment, the heat exchange medium firstly flows through the power supply module heat exchange device (20), the heat of the power supply module is taken away, then the heat exchange medium directly returns to the whole vehicle heat management system through the conversion device (60), and the power supply module is refrigerated;
when the battery manager (80) detects that the battery core operating temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power supply module is less than or equal to a fourth preset temperature t4, the battery manager (80) informs the whole vehicle thermal management system that the battery system has no thermal management requirement.
6. The power cell thermal management system of claim 2, wherein:
conversion equipment (60) is the four-way reversing valve, including first interface (1), second interface (2), third interface (3) and fourth interface (4), conversion equipment (60) connect in power module heat transfer device (20) with battery heat transfer device (40) one side, first interface (1) with whole car thermal management system is connected in second interface (2), third interface (3) are connected power module heat transfer device, fourth interface (4) are connected battery heat transfer device (40).
7. The power cell thermal management system of claim 6, wherein:
when the battery manager (80) detects that the temperature of the battery core of the battery pack is lower than a first preset temperature t1, the battery manager (80) controls a heating component in the power module to work, the battery manager (80) controls the conversion device (60) to be switched to the state S1, namely, the third interface (3) is an outlet, the fourth interface (4) is an inlet, and at the moment, a heat exchange medium firstly flows through the power module heat exchange device (20), takes away the heat of the power module, and then flows through the battery heat exchange device (40) to heat the battery core.
8. The power cell thermal management system of claim 7, wherein:
when the battery manager (80) detects that the battery core operation temperature range of the battery pack is from a first preset temperature t1 to a second preset temperature t2, the battery manager (80) controls heating components in the power supply module to stop working, the battery manager (80) controls the conversion device (60) to be switched to a state S1, namely the third interface (3) is an outlet, the fourth interface (4) is an inlet, and at the moment, a heat exchange medium firstly flows through the power supply module heat exchange device (20), takes heat of the power supply module away, and then flows through the battery heat exchange device (40) to heat the battery core;
when the battery manager (80) detects that the battery core operation temperature of the battery pack is higher than a third preset temperature t3, the battery manager (80) controls the conversion device (60) to switch to a state S2, namely the third interface (3) is an inlet, the fourth interface (4) is an outlet, and at the moment, the heat exchange medium flows through the battery heat exchange device (40) firstly and then flows through the power supply module heat exchange device (20) to refrigerate the battery core;
when the battery manager (80) detects that the battery core operation temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3, and the temperature of the power supply module is greater than a fourth preset temperature t4, the battery manager (80) controls the conversion device (60) to be switched to a state S2, namely the third interface (3) is an inlet, the fourth interface (4) is an outlet, and at the moment, the heat exchange medium firstly flows through the battery heat exchange device (40) and then flows through the power supply module heat exchange device (20) to refrigerate the battery core;
when the battery manager (80) detects that the electric core operation temperature range of the battery pack is from a second preset temperature t2 to a third preset temperature t3 and the temperature of the power supply module is less than or equal to a fourth preset temperature t4, the battery manager (80) controls the conversion device (60) to be switched to a state S3, namely the third interface (3) and the fourth interface (4) are both closed, a heat exchange medium enters the conversion device (60) from the first interface (1) and then flows out from the second interface (2), and at the moment, the heat exchange medium does not flow through the power battery thermal management system.
9. An automobile, characterized in that the automobile is provided with the power battery thermal management system of any one of claims 2 to 8.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103053067A (en) * | 2010-08-09 | 2013-04-17 | 株式会社Lg化学 | Battery pack of novel structure |
| CN204966636U (en) * | 2015-07-23 | 2016-01-13 | 北汽福田汽车股份有限公司 | Battery heating device , power battery package equipment and electric vehicle |
| CN111231655A (en) * | 2018-11-29 | 2020-06-05 | 比亚迪股份有限公司 | Vehicle thermal management system, control method thereof and vehicle |
| CN210926232U (en) * | 2019-12-23 | 2020-07-03 | 奇瑞汽车股份有限公司 | Battery pack thermal management system of electric automobile |
| CN112339527A (en) * | 2020-12-01 | 2021-02-09 | 南京协众汽车空调集团有限公司 | New energy automobile thermal management system and working method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6624107B2 (en) * | 2017-02-10 | 2019-12-25 | 株式会社豊田中央研究所 | Vehicle heat management control device, heat management control program |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103053067A (en) * | 2010-08-09 | 2013-04-17 | 株式会社Lg化学 | Battery pack of novel structure |
| CN204966636U (en) * | 2015-07-23 | 2016-01-13 | 北汽福田汽车股份有限公司 | Battery heating device , power battery package equipment and electric vehicle |
| CN111231655A (en) * | 2018-11-29 | 2020-06-05 | 比亚迪股份有限公司 | Vehicle thermal management system, control method thereof and vehicle |
| CN210926232U (en) * | 2019-12-23 | 2020-07-03 | 奇瑞汽车股份有限公司 | Battery pack thermal management system of electric automobile |
| CN112339527A (en) * | 2020-12-01 | 2021-02-09 | 南京协众汽车空调集团有限公司 | New energy automobile thermal management system and working method thereof |
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