CN109301368B - New energy electric automobile battery comprehensive thermal management system and control method - Google Patents

New energy electric automobile battery comprehensive thermal management system and control method Download PDF

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CN109301368B
CN109301368B CN201811213727.2A CN201811213727A CN109301368B CN 109301368 B CN109301368 B CN 109301368B CN 201811213727 A CN201811213727 A CN 201811213727A CN 109301368 B CN109301368 B CN 109301368B
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module
battery
tec
heat
heating
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CN109301368A (en
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瞿志刚
刘冬
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/617Types of temperature control for achieving uniformity or desired distribution of temperature
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/63Control systems
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/63Control systems
    • H01M10/633Control systems characterised by algorithms, flow charts, software details or the like
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/63Control systems
    • H01M10/637Control 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy 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)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a new energy electric automobile battery comprehensive heat management system and a control method, wherein the output end of a temperature sensor is connected with a battery electrode temperature acquisition module, a RISC circuit control system is connected with the battery electrode temperature acquisition module, the RISC circuit control system is also connected with a heating TEC module and a refrigerating TEC module, a heat balance heat pipe is packaged in a temperature equalization plate, the head end of the heat conduction heat pipe is connected with the temperature equalization plate, the tail end of the heat conduction heat pipe is connected with an energy storage unit, and the middle part of the heat conduction heat pipe is connected with the heating TEC module and the refrigerating TEC module; the heat is conducted out of the battery box through the heat conduction heat pipe, so that the heat dissipation problem of the sealed space inside the battery box is solved; the heating TEC module is electrified to generate heat to heat the battery box, and the refrigerating TEC module is electrified to absorb heat to refrigerate the battery box. The invention can solve the problems of complex control and poor consistency of battery temperature control in the prior art.

Description

New energy electric automobile battery comprehensive thermal management system and control method
Technical Field
The invention relates to a new energy electric automobile. In particular to a new energy electric automobile battery comprehensive thermal management system and a control method.
Background
The main functions of the battery thermal management of the new energy automobile include: when the temperature of the battery is higher, the battery is effectively cooled, so that thermal runaway caused by the overhigh temperature of the battery is prevented; heating is carried out when the temperature of the battery is low, so that the temperature of the battery is increased, and the charging and discharging performance and safety of the battery at low temperature are ensured; the temperature difference between the battery monomers is reduced, the consistency of the working temperature of the battery monomers is maintained, the battery at the position with higher temperature is prevented from being attenuated too fast, and the overall service life of the battery pack is prolonged.
According to different heat conduction mediums, the heat management and cooling modes of the new energy automobile battery mainly comprise: 1> naturally radiating; 2, forced air cooling; 3> liquid cooling; 4> direct cooling; 5> phase change material. At present, the cooling mode of the battery of the new energy automobile mainly comprises air heat management and liquid cooling and heating management. Phase change material thermal management techniques are currently under a small scope of exploration.
The natural cooling system in the air thermal management system is greatly influenced by the ambient temperature, and can only naturally dissipate heat of the battery under the condition that the outdoor ambient temperature is proper, so that the effective heat dissipation when the heat productivity is large can not be met, and the battery can not be heated under the environment of cold weather, and the application range is limited. The air heat management system of the vehicle-mounted air conditioning system needs to be integrated with the whole vehicle air conditioning system, a refrigerant pipeline and a cooling water pipeline need to be arranged, a ventilation air duct needs to be designed, the battery pack is uniformly radiated by using cold air, and a ventilation unit needs to occupy a large three-dimensional space and squeeze the installation space of the battery; therefore, the air-conditioning air-cooling heat management system occupies a larger space and has smaller specific volume energy density. Meanwhile, the air heat management system has the defects that the uniformity of the temperature inside the battery box is difficult to control, the sealing design of the battery box is difficult, and the dustproof and waterproof effects are poor. The liquid cooling heat management system has complex design, large volume, complex pipeline arrangement and high cost, and liquid cooling pipelines are required to be arranged; it is necessary to add a water tank and a water pump, the weight of the water tank is increased, and the occupied space is larger. In addition, the insulating liquid adopted by the liquid cooling system has high viscosity and is not easy to flow when in direct contact, so that the heat transfer effect is limited; the indirect contact type liquid cooling thermal management system adopts a liquid medium with poor insulation property, and once leakage occurs, short circuit is easily caused.
Disclosure of Invention
The invention aims to provide a new energy electric vehicle battery comprehensive thermal management system which has the advantages of larger applicable temperature range, smaller occupied three-dimensional space, compact and simple sealed design of a battery box, convenient installation, better dustproof and waterproof effects and good heat transfer effect, and can solve the problems of complex control and poor consistency of battery temperature control in the prior art; the invention further provides a control method of the new energy electric automobile battery comprehensive heat management system.
In order to achieve the above purpose, the invention has the following technical scheme:
The invention relates to a new energy electric automobile battery comprehensive heat management system, which comprises a battery box, a power battery module positioned in the battery box, a heating TEC module, a refrigeration TEC module, a RISC circuit control system, a battery electrode temperature acquisition module, a temperature sensor, a heat balance heat pipe, a heat conduction heat pipe and an energy storage unit, wherein the output end of the temperature sensor is connected with the battery electrode temperature acquisition module, the temperature sensor is positioned near the battery module, the RISC circuit control system is connected with the battery electrode temperature acquisition module, the RISC circuit control system is also connected with the heating TEC module and the refrigerating TEC module, the heat balance heat pipe is packaged in the temperature equalization plate, the head end of the heat conduction heat pipe is connected with the temperature equalization plate, the tail end of the heat conduction heat pipe is connected with the energy storage unit, and the middle part of the heat conduction heat pipe is connected with the heating TEC module and the refrigerating TEC module; the heat is conducted out of the battery box through the heat conduction heat pipe, so that the heat dissipation problem of the sealed space inside the battery box is solved; the heating TEC module is electrified to generate heat to heat the battery box, and the refrigerating TEC module is electrified to absorb heat to refrigerate the battery box.
The RISC circuit control system comprises a singlechip, a switching element driving and controlling module, a DC/DC converter, wherein the singlechip is respectively connected with a battery electrode temperature acquisition module and the switching element driving and controlling module, the battery electrode temperature acquisition module is connected with a temperature sensor, and the output end of the switching element driving and controlling module is connected with a heating TEC module and a refrigerating TEC module through the DC/DC converter.
The solar energy storage battery is characterized in that the heating TEC device, the refrigeration TEC device, the battery module, the temperature equalizing plate, the energy storage unit and the heat conduction heat pipes are all located in the battery box, the heating TEC module and the refrigeration TEC module comprise a plurality of assemblies which are connected in parallel, the heating TEC module and the refrigeration TEC module are powered by the battery module, the temperature equalizing plate is located above the battery module, and the heating TEC module, the refrigeration TEC module and the energy storage unit are connected through the heat conduction heat pipes. .
The battery box is provided with a plurality of through holes on one side edge provided with the heating TEC module and the refrigerating TEC module, and a heat insulation layer is arranged on the one side edge, the heating TEC module and the refrigerating TEC module.
An insulating heat-conducting silica gel pad is arranged between the temperature equalizing plate and the battery module; a heat conduction silica gel is arranged between the heating TEC module and the cooling TEC module and between the cooling TEC module and the cooling fan; and a sealing gasket is arranged between the side plate of the battery box and the heat conduction heat pipe.
The heat-conducting heat pipe is connected with the energy storage module through the through holes, and the side edge of the energy storage unit is sealed with the heat-conducting heat pipe through a sealing ring.
The energy storage unit is a closed metal box, and mixed solution of water and glycol with the volume of 1:1 is poured into the metal box; when the temperature of the battery module rises, the heat conduction heat pipe firstly guides heat into the energy storage unit, the heat is absorbed by the liquid in the energy storage unit and stored in the energy storage unit, and when the heat absorbed by the energy storage unit can not maintain the battery to work in a set working range, the refrigeration TEC module is started to refrigerate.
The invention discloses a control method for a new energy electric automobile battery comprehensive thermal management system, which comprises the following steps:
(1) Setting the working temperature ranges Tl to Th of the battery modules;
(2) The battery electrode temperature acquisition module sends acquired battery module working temperature electric signals to the RISC circuit control system, the RISC circuit control system processes the signals and outputs control instructions to the switch element driving and controlling module according to the processing results, if the detected battery module working temperature is not in the set working range of the power battery module, the switch element driving and controlling module drives the DC/DC converter to control the refrigeration TEC module to refrigerate or heat the TEC module according to the instructions of the RISC circuit control system, if the detected power battery working temperature is in the set working range, whether the heating TEC module and the refrigeration TEC module work or not is judged, if the heating TEC module and the refrigeration TEC module work, the RISC circuit control system outputs the working instructions to stop the heating TEC module and the refrigeration TEC module, and if the heating TEC module and the refrigeration TEC module do not work, the RISC circuit control system does not output the operation instructions;
Wherein the following steps are further provided:
if the working temperature T of the battery module is larger than Th, the RISC circuit control system sends a TEC module refrigerating instruction to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the TEC module to refrigerate;
If the working temperature T of the battery module is less than Tl, the RISC circuit control system sends a heating instruction for heating the TEC module to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the TEC module to heat;
If the working temperature (Tl+Th)/2-Deltat is less than T < (Tl+Th)/2-Deltat, the RISC circuit control system judges whether the heating TEC module and the refrigerating TEC module work or not, if the heating TEC module and the refrigerating TEC module work, the operation instructions for stopping working of the heating TEC module and the refrigerating TEC module are output, and if the heating TEC module and the refrigerating TEC module do not work, the operation instructions are not output; t is the working temperature of the battery module, tl and Th are the set working temperatures of the battery module, and Deltat is the ambient temperature;
when the battery module does not work in a low-temperature environment, the RISC circuit control system sends a heating command of the heating TEC module to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the heating TEC module to heat and preserve heat of the battery module;
Wherein the following steps are further provided:
In the step (1), the switching element driving and controlling module controls the refrigeration voltage Vl of the refrigeration TEC module and controls the heating voltage Vh of the heating TEC module;
In the step (2), when the battery electrode temperature acquisition module detects that the working temperature T of the battery module is greater than Th, the input voltage of the refrigeration TEC module is regulated to be refrigeration voltage Vl;
When the battery electrode temperature acquisition module detects that the working temperature T of the battery module is less than Tl, the input voltage of the heating TEC module is regulated to be heating voltage Vh;
In the step (1) and the step (2), when the working temperature T of the battery module is more than Tk+ [ delta ] T, the heat conduction heat pipe automatically conducts heat to the energy storage unit, so that the temperature rise of the battery module in working is slowed down;
In the step (1) and the step (2), when the working temperature T of the battery module is more than Tk-Deltat, the heat conduction heat pipe stops working, and the temperature of the battery module is prevented from being too low when the battery module works;
t is the working temperature of the battery module, tk is the critical value of the working temperature operation of the battery module, and Deltat is the ambient temperature.
Due to the adoption of the technical scheme, the invention has the advantages that:
The battery box has the advantages of larger applicable temperature range, smaller occupied space, compact and simple sealed design, convenient installation, better dustproof and waterproof effects and good heat transfer effect, and can solve the problems of complex control and poor consistency of battery temperature control in the prior art.
Drawings
FIG. 1 is a schematic diagram of a circuit control system of the present invention;
FIG. 2 is a schematic diagram of a temperature control structure according to the present invention;
FIG. 3 is an enlarged schematic view of the internal structure of the temperature equalization plate of the present invention;
FIG. 4 is a schematic illustration of a thermally conductive insulating layer;
fig. 5 is a control flow chart of the present invention.
In the figure: 1. a battery box; 2. a temperature equalizing plate; 3. a heat conduction heat pipe; 4. a TEC module; 5. an energy storage unit; 6. the internal section structure of the temperature equalizing plate; 7. a heat balance heat pipe; 8. a battery module; 9. heat conductive insulating silica gel.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1-5, the invention discloses a new energy electric automobile battery comprehensive thermal management system, which comprises a battery box, a power battery module, a heating TEC module, a refrigeration TEC module, a RISC circuit control system, a battery electrode temperature acquisition module, a temperature sensor, a heat balance heat pipe, a heat conduction heat pipe and an energy storage unit, wherein the power battery module positioned in the battery box comprises the battery box; the heat is conducted out of the battery box through the heat conduction heat pipe, so that the heat dissipation problem of the sealed space inside the battery box is solved; the heating TEC module is electrified to generate heat to heat the battery box, and the refrigerating TEC module is electrified to absorb heat to refrigerate the battery box.
The RISC circuit control system comprises a singlechip, a switching element driving and controlling module, a DC/DC converter, wherein the singlechip is respectively connected with a battery electrode temperature acquisition module and the switching element driving and controlling module, the battery electrode temperature acquisition module is connected with a temperature sensor, and the output end of the switching element driving and controlling module is connected with a heating TEC module and a refrigerating TEC module through the DC/DC converter.
The heating TEC device, the refrigeration TEC device, the battery module, the samming board, the energy storage unit, the heat conduction heat pipe all is located the battery box, and heating TEC module and refrigeration TEC module all include a plurality of parallelly connected subassembly, and heating TEC module and refrigeration TEC module are supplied power by the battery module, and the samming board is located the top of battery module, links to each other with heating TEC module and refrigeration TEC module and energy storage unit through the heat conduction heat pipe. .
The battery box is provided with a plurality of through holes on one side edge provided with the heating TEC module and the refrigerating TEC module, and a heat insulation layer is arranged on the one side edge, the heating TEC module and the refrigerating TEC module.
An insulating heat-conducting silica gel pad is arranged between the temperature equalizing plate and the battery module; a heat conduction silica gel is arranged between the heating TEC module and the cooling TEC module and between the cooling TEC module and the cooling fan; and a sealing gasket is arranged between the side plate of the battery box and the heat conduction heat pipe.
The side of the energy storage unit is provided with a plurality of through holes, the heat conduction heat pipe is connected with the energy storage module through the through holes, and the side of the energy storage unit is sealed with the heat conduction heat pipe through a sealing ring.
The energy storage unit is a closed metal box, and mixed solution of water and glycol with the volume of 1:1 is poured into the metal box; when the temperature of the battery module rises, the heat conduction heat pipe firstly guides heat into the energy storage unit, the heat is absorbed by the liquid in the energy storage unit and stored in the energy storage unit, and when the heat absorbed by the energy storage unit can not maintain the battery to work in a set working range, the refrigeration TEC module is started to refrigerate.
The invention discloses a control method for a new energy electric automobile battery comprehensive thermal management system, which comprises the following steps:
(1) Setting the working temperature ranges Tl to Th of the battery modules;
(2) The battery electrode temperature acquisition module sends acquired battery module working temperature electric signals to the RISC circuit control system, the RISC circuit control system processes the signals and outputs control instructions to the switch element driving and controlling module according to the processing results, if the detected battery module working temperature is not in the set working range of the power battery module, the switch element driving and controlling module drives the DC/DC converter to control the refrigeration TEC module to refrigerate or heat the TEC module according to the instructions of the RISC circuit control system, if the detected power battery working temperature is in the set working range, whether the heating TEC module and the refrigeration TEC module work or not is judged, if the heating TEC module and the refrigeration TEC module work, the RISC circuit control system outputs the working instructions to stop the heating TEC module and the refrigeration TEC module, and if the heating TEC module and the refrigeration TEC module do not work, the RISC circuit control system does not output the operation instructions;
Wherein the following steps are further provided:
if the working temperature T of the battery module is larger than Th, the RISC circuit control system sends a TEC module refrigerating instruction to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the TEC module to refrigerate;
If the working temperature T of the battery module is less than Tl, the RISC circuit control system sends a heating instruction for heating the TEC module to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the TEC module to heat;
If the working temperature (Tl+Th)/2-Deltat is less than T < (Tl+Th)/2-Deltat, the RISC circuit control system judges whether the heating TEC module and the refrigerating TEC module work or not, if the heating TEC module and the refrigerating TEC module work, the operation instructions for stopping working of the heating TEC module and the refrigerating TEC module are output, and if the heating TEC module and the refrigerating TEC module do not work, the operation instructions are not output; t is the working temperature of the battery module, tl and Th are the set working temperatures of the battery module, and Deltat is the ambient temperature;
when the battery module does not work in a low-temperature environment, the RISC circuit control system sends a heating command of the heating TEC module to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the heating TEC module to heat and preserve heat of the battery module;
Wherein the following steps are further provided:
In the step (1), the switching element driving and controlling module controls the refrigeration voltage Vl of the refrigeration TEC module and controls the heating voltage Vh of the heating TEC module;
In the step (2), when the battery electrode temperature acquisition module detects that the working temperature T of the battery module is greater than Th, the input voltage of the refrigeration TEC module is regulated to be refrigeration voltage Vl;
When the battery electrode temperature acquisition module detects that the working temperature T of the battery module is less than Tl, the input voltage of the heating TEC module is regulated to be heating voltage Vh;
In the step (1) and the step (2), when the working temperature T of the battery module is more than Tk+ [ delta ] T, the heat conduction heat pipe automatically conducts heat to the energy storage unit, so that the temperature rise of the battery module in working is slowed down;
In the step (1) and the step (2), when the working temperature T of the battery module is more than Tk-Deltat, the heat conduction heat pipe stops working, and the temperature of the battery module is prevented from being too low when the battery module works;
T is the working temperature of the battery module, tk is the heat conduction critical value of the working temperature operation of the battery module, and Deltat is the ambient temperature.
The singlechip is produced by ATMEL company and has the model of AVR32; the battery electrode temperature acquisition module adopts SA1XL series produced by OMEGA company; temperature sensor: the model is SA1XL-K-SRTC manufactured by OMEGA company. The DC/DC converter is a PWM DC/DC converter, and a URF48_QB-200WR3 200W high-power module manufactured by Jin Sheng cationic company is adopted; the driving and controlling module of the switching element is produced by Pengliwei electronics, and the model is PZ150-110S05-L.
The temperature equalization plate adopts an aluminum plate, and a semi-annular flat heat balance heat pipe for heat balance is embedded in the aluminum plate; the temperature equalizing plate has good heat conducting performance, can quickly absorb and conduct heat generated by the battery module, and can quickly dissipate heat of the battery module; the heat balance heat pipe can quickly balance heat in different areas of the temperature-equalizing plate, and eliminate temperature difference in each area of the temperature-equalizing plate.
TEC module: the semiconductor refrigerator (ThermoelectricCooler) is fabricated using the peltier effect of semiconductor materials. The peltier effect refers to a phenomenon in which when a direct current passes through a couple composed of two semiconductor materials, one end absorbs heat and the other end releases heat; TEC includes P-type and N-type pairs (sets) that are connected together by electrodes and sandwiched between two ceramic electrodes; when current flows through the TEC, heat generated by the current can be transferred from one side of the TEC to the other side, and a hot side and a cold side are generated on the TEC, which is the heating and refrigerating principle of the TEC. The invention can realize the conversion of refrigerating and heating the TEC by changing the polarity of the TEC through the RISC circuit control system.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Not all embodiments are exhaustive. All obvious changes or modifications which come within the spirit of the invention are desired to be protected.

Claims (5)

1. The utility model provides a new forms of energy electric automobile battery synthesizes thermal management system, includes the battery box, is located the power battery module of battery box, its characterized in that: the system also comprises a heating TEC module, a refrigerating TEC module, a RISC circuit control system, a battery electrode temperature acquisition module, a temperature sensor, a heat balance heat pipe and a heat conduction heat pipe, an energy storage unit, the output end of the temperature sensor is connected with the battery electrode temperature acquisition module, the temperature sensor is positioned near the battery module, the RISC circuit control system is connected with the battery electrode temperature acquisition module, the RISC circuit control system is also connected with the heating TEC module and the refrigerating TEC module, the heat balance heat pipe is packaged in the temperature equalizing plate, the head end of the heat conduction heat pipe is connected with the temperature equalizing plate, the tail end of the heat conduction heat pipe is connected with the energy storage unit, and the middle part of the heat conduction heat pipe is connected with the heating TEC module and the refrigerating TEC module; the heat is conducted out of the battery box through the heat conduction heat pipe, so that the heat dissipation problem of the sealed space inside the battery box is solved; the heating TEC module is electrified to generate heat to heat the battery box, and the refrigerating TEC module is electrified to absorb heat to refrigerate the battery box;
The RISC circuit control system comprises a singlechip, a switching element driving and controlling module, a DC/DC converter, wherein the singlechip is respectively connected with a battery electrode temperature acquisition module and the switching element driving and controlling module, the battery electrode temperature acquisition module is connected with a temperature sensor, and the output end of the switching element driving and controlling module is connected with a heating TEC module and a refrigerating TEC module through the DC/DC converter;
the heating TEC module, the refrigerating TEC module, the battery module, the temperature equalizing plate, the energy storage unit and the heat conduction heat pipes are all positioned in the battery box, the heating TEC module and the refrigerating TEC module comprise a plurality of assemblies which are connected in parallel, the heating TEC module and the refrigerating TEC module are powered by the battery module, and the temperature equalizing plate is positioned above the battery module and is connected with the heating TEC module, the refrigerating TEC module and the energy storage unit through the heat conduction heat pipes;
The energy storage unit is a closed metal box, and mixed solution of water and glycol with the volume of 1:1 is poured into the metal box; when the temperature of the battery module rises, the heat conduction heat pipe firstly guides heat into the energy storage unit, the heat is absorbed by the liquid in the energy storage unit and stored in the energy storage unit, and when the heat absorbed by the energy storage unit can not maintain the battery to work in a set working range, the refrigeration TEC module is started to refrigerate.
2. The integrated thermal management system for a new energy electric vehicle battery of claim 1, wherein: the battery box is provided with a plurality of through holes on one side edge provided with the heating TEC module and the refrigerating TEC module, and a heat insulation layer is arranged on the one side edge, the heating TEC module and the refrigerating TEC module.
3. The integrated thermal management system for a new energy electric vehicle battery of claim 1, wherein: an insulating heat-conducting silica gel pad is arranged between the temperature equalizing plate and the battery module; a heat conduction silica gel is arranged between the heating TEC module and the cooling TEC module and between the cooling TEC module and the cooling fan; and a sealing gasket is arranged between the side plate of the battery box and the heat conduction heat pipe.
4. The integrated thermal management system for a new energy electric vehicle battery of claim 1, wherein: the side of the energy storage unit is provided with a plurality of through holes, the heat conduction heat pipe is connected with the energy storage module through the through holes, and the side of the energy storage unit is sealed with the heat conduction heat pipe through a sealing ring.
5. The control method for the new energy electric vehicle battery integrated thermal management system according to claim 1, characterized by comprising the following steps: (1) setting the working temperature ranges Tl to Th of the battery modules; (2) The battery electrode temperature acquisition module sends acquired battery module working temperature electric signals to the RISC circuit control system, the RISC circuit control system processes the signals and outputs control instructions to the switch element driving and controlling module according to the processing results, if the detected battery module working temperature is not in the set working range of the battery module, the switch element driving and controlling module drives the DC/DC converter to control the refrigeration TEC module to refrigerate or heat the TEC module according to the instructions of the RISC circuit control system, if the detected battery module working temperature is in the set working range, whether the heating TEC module and the refrigeration TEC module work is judged, if the heating TEC module and the refrigeration TEC module work, the RISC circuit control system outputs the working instructions of the heating TEC module and the refrigeration TEC module, and if the heating TEC module and the refrigeration TEC module do not work, the RISC circuit control system does not output the operation instructions;
Further comprises: if the working temperature T of the battery module is larger than Th, the RISC circuit control system sends a TEC module refrigerating instruction to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the TEC module to refrigerate; if the working temperature T of the battery module is less than Tl, the RISC circuit control system sends a heating instruction for heating the TEC module to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the TEC module to heat; if the working temperature (Tl+Th)/2-Deltat is less than T < (Tl+Th)/2-Deltat, the RISC circuit control system judges whether the heating TEC module and the refrigerating TEC module work or not, if the heating TEC module and the refrigerating TEC module work, the operation instructions for stopping working of the heating TEC module and the refrigerating TEC module are output, and if the heating TEC module and the refrigerating TEC module do not work, the operation instructions are not output; t is the working temperature of the battery module, tl and Th are the set working temperatures of the battery module, and Deltat is the ambient temperature; when the battery module does not work in a low-temperature environment, the RISC circuit control system sends a heating command of the heating TEC module to the switch element driving and controlling module, and the switch element driving and controlling module drives the DC/DC converter to control the heating TEC module to heat and preserve heat of the battery module;
Further comprises: in the step (1), the switching element driving and controlling module controls the refrigeration voltage Vl of the refrigeration TEC module and controls the heating voltage Vh of the heating TEC module; in the step (2), when the battery electrode temperature acquisition module detects that the working temperature T of the battery module is greater than Th, the input voltage of the refrigeration TEC module is regulated to be refrigeration voltage Vl; when the battery electrode temperature acquisition module detects that the working temperature T of the battery module is less than Tl, the input voltage of the heating TEC module is regulated to be heating voltage Vh; in the step (1) and the step (2), when the working temperature T of the battery module is more than Tk+ [ delta ] T, the heat conduction heat pipe automatically conducts heat to the energy storage unit, so that the temperature rise of the battery module in working is slowed down; in the step (1) and the step (2), when the working temperature T of the battery module is more than Tk-Deltat, the heat conduction heat pipe stops working, and the temperature of the battery module is prevented from being too low when the battery module works; t is the working temperature of the battery module, tk is the critical value of the working temperature operation of the battery module, and Deltat is the ambient temperature.
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