Commercial car power battery thermal management system
Technical field
The present invention relates to a kind of battery thermal management system, more particularly to a kind of commercial car power battery thermal management system.
Background technology
As global energy crisis increasingly sharpens with environmental problem, orthodox car industry is faced with unprecedented sternness
Challenge;World Main Auto producing country accelerates deployment one after another, using Development of EV as national strategy, accelerates Push Technology
Research and development and industrialization, while greatly developing and popularization and application automobile energy-saving technology;Power battery pack is produced in car running process
Raw substantial amounts of heat, will cause battery pack temperature to rise if heat does not shed in time;Too high, too low temperature not only reduces lithium electricity
The service efficiency in pond and circulatory system life-span, it is also possible to cause battery eventual failure, or even the danger of explosive fire accident occur;
Therefore temperature during power battery pack discharge and recharge must be controlled within the specific limits.
The current battery type of cooling mainly has air-cooled, liquid cold and phase-change material cooling;Air-cooled and liquid is cold need fan and
The extra energy-consuming parts of water pump, not only increase energy content of battery consumption, also reduce the reliability of system, this is original to continual mileage
It is very unfavorable for short electric car;And phase-change material absorbs battery in charge and discharge process using its latent heat of phase change
The heat of generation, not only loses without energy parasitic, simultaneously because the isothermal of phase transition process, also keeps temperature between battery cell
Uniformity;Battery mode of heating is mainly PTC or heating film heating, also increases energy content of battery consumption;Due to electric automobile
Power battery pack volume is big, battery cell quantity is more, arrangement is complicated, and its temperature is presented overall distribution and differed greatly.
Although carrying out cooling using phase-change material to have many advantages, phase-change material is single use as the heat of battery
Management system, the possibility for having cooling failure when melting completely under exceedingly odious operating mode;And liquid is cold can realize battery temperature rapidly
Drop, by being combined phase-change material and liquid are cold, when battery heat production is relatively low, phase-change material is by itself decalescence to battery
Individually cooled down, it is cold to be not turned on liquid, be now passive cooling, so as to reduce energy consumption;When battery heat production is higher, phase-change material
When heat all can not be absorbed and be discharged by itself phase transformation, liquid is opened cold.
Conventional battery liquid cooling system includes the glycol water circulatory system and refrigerant-cycle systems, the ethylene glycol
Water solution cycle system include compensation tank, electrokinetic cell, cooled plate, water pump, the refrigerant-cycle systems include expansion valve,
Condenser, compressor, both carry out heat transfer by heat exchanger of air condition;, will by the work and the drive of water pump of air-conditioning
The heat of battery is transmitted to refrigerant and taken away;Battery mode of heating is mainly PTC or heating film heating, is typically located at electrokinetic cell
It is internal;Whole system consumption electricity is larger.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of commercial car power battery thermal management system, carry out actively cold
But the problem of uniform electric quantity consumption of heat skewness is larger is solved.
The present invention is to solve above-mentioned technical problem by following technical proposals:A kind of commercial car electrokinetic cell heat management
System, it is characterised in that it includes cooling system, heating system, the glycol water circulatory system and refrigerant-cycle systems,
The glycol water circulatory system includes compensation tank, electrokinetic cell, the first water pump, and the refrigerant-cycle systems include
Expansion valve, condenser, compressor;The cooling recirculation system of cooling system and a vehicle motor is connected in parallel and including three energizations
Magnet valve, radiator, switch switching is carried out by three-way magnetic valve;Cooled down because the cooling recirculation system of vehicle motor includes intelligence
Management system, new energy motor, the 3rd water pump, so cooling system dissipates in intelligent one battery of cooling management system parallel connection outside
Cooling is blowed in hot device, the air draught type electronic fan for borrowing intelligent cooling management system;Heating system includes heat exchanger and sky
Heat exchanger is adjusted, compensation tank is connected with electrokinetic cell, the first water pump, and the first water pump is connected with heat exchanger, heat exchanger and air-conditioning
Heat exchanger is connected, and electrokinetic cell, heat exchanger of air condition, intelligent cooling management system, radiator are all connected with threeway battery valve,
Heat exchanger of air condition, expansion valve, condenser, compressor are connected to form loop, intelligent cooling management system, new energy motor,
Three water pumps are connected to form loop.
Preferably, the heat exchanger is connected with an independent water-heating system, and independent water-heating system includes vehicle radiator, the
Two water pumps, independent water-warming heater, the second water pump are connected with independent water-warming heater, the second water, independent water-warming heater all with
Vehicle radiator is in parallel, and independent water-warming heater, a battery valve are all connected with heat exchanger.
Preferably, the electrokinetic cell is using battery modules and including composite phase-change material layer, highly heat-conductive material layer, water cooling
Plate, battery cell, are highly heat-conductive material layer between battery cell and battery cell, battery cell both sides are composite phase-change material
Layer;Heat is conducted to composite phase-change material layer, while coolant crosses cooled plate by outside cooling system by highly heat-conductive material layer
Heat is taken away into pipeline.
Preferably, the radiator shares at least one electronic fan with intelligent cooling management system.
The positive effect of the present invention is:Cold be combined with phase-change material of liquid can be well by the temperature rise of battery bag
Control is in sets target, and temperature homogeneity is preferable;Phase-change material plays a part of a reduction energy expenditure;New type power electricity
Pond heat management system changes smaller compared to original system, more saves, the battery temperature difference can be more uniform.
Brief description of the drawings
Fig. 1 is the structural representation of commercial car power battery thermal management system.
Fig. 2 is the cold front view that radiator structure is combined with phase-change material of liquid.
Fig. 3 is the cold top view that radiator structure is combined with phase-change material of liquid.
Embodiment
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, to describe technical scheme in detail.
As shown in figure 1, commercial car power battery thermal management system of the present invention includes cooling system, heating system, ethylene glycol
Water solution cycle system and refrigerant-cycle systems, the glycol water circulatory system include compensation tank 1, electrokinetic cell
2nd, the first water pump 3, the refrigerant-cycle systems include expansion valve 7, condenser 8, compressor 9;Cooling system and a vehicle
The cooling recirculation system of motor is connected in parallel and including three-way magnetic valve 5, radiator 22, switched by three-way magnetic valve 5
Switching;Because the cooling recirculation system of vehicle motor includes intelligent cooling management system (ATS) 10, new energy motor the 11, the 3rd
Water pump 12, so cooling system is in intelligent one battery radiator of cooling management system parallel connection outside, borrows intelligence cooling management
Cooling is blowed in the air draught type electronic fan of system;Heating system includes heat exchanger 4 and heat exchanger of air condition 6, compensation tank 1
It is connected with electrokinetic cell 2, the first water pump 3, the first water pump 3 is connected with heat exchanger 4, and heat exchanger 4 is connected with heat exchanger of air condition 6,
Electrokinetic cell 2, heat exchanger of air condition 6, intelligent cooling management system 10, radiator 22 are all connected with threeway battery valve 5, air conditioner heat
Exchanger 6, expansion valve 7, condenser 8, compressor 9 are connected to form loop, intelligent cooling management system 10, new energy motor 11,
3rd water pump 12 is connected to form loop.
Radiator 22 shares at least one electronic fan with intelligent cooling management system 10, so economizes on resources.
Car air-conditioner is below 20 DEG C of environment temperature, and refrigeration can decline;For this feature, it can be powered by three
Magnet valve carries out switch switching setting cooling circuit;Below 20 DEG C of environment temperature, the preferential cooling circulation for opening vehicle motor makes
With cooling system cooling battery;In more than 20 DEG C of environment temperature, preferentially using refrigerant-cycle systems;Later stage can be carried out
Preventing test, adjustment temperature limit value further reduces the power consumption needed for battery cooling.
For the situation that winter warm wind is not enough, conventional commercial car warm wind can install a set of independent water-heating system, i.e. heat exchanger 4
It is connected with an independent water-heating system, independent water-heating system includes vehicle radiator 14, the second water pump 15, independent water-warming heater
16, the second water pump 15 is connected with independent water-warming heater 16, the second water pump 15, independent water-warming heater 16 all with vehicle radiator
14 is in parallel, and independent water-warming heater 16, a battery valve 13 are all connected with heat exchanger 4.Increased heating system borrows independent water
Heating system, battery Glycol Circulation System is heated by the hot water of independent hot-water heating at heat exchanger;When battery temperature rises to energy
In the case of by discharge and recharge, heating system is closed by the switching of magnetic valve 13;Because heating is all daily first to battery every time
When secondary startup, temperature need not heated rise at once after after battery work, so battery heating process and vehicle heat
Car process is overlapping, will not increase the unnecessary time.
As shown in Figure 2 to Figure 3, in order to reduce the inhomogeneities of battery temperature, electrokinetic cell battery modules are changed a social system.
Electrokinetic cell is using battery modules and including composite phase-change material layer 17, highly heat-conductive material layer 18, cooled plate 19, battery cell
20, it is highly heat-conductive material layer 18 between battery cell 20 and battery cell 20, battery cell both sides are composite phase-change material layer 17;
Heat is conducted to composite phase-change material layer 17, while coolant crosses cooled plate 19 by outside cooling system by highly heat-conductive material layer 18
System takes away heat into pipeline, so as to realize the main type of cooling being passively combined.
Liquid is cold and phase-change material is combined and well can controlled the temperature rise of battery bag in sets target, and temperature is uniform
Property is preferable;Phase-change material plays a part of a reduction energy expenditure;Novel power battery heat management system is compared to original system
Change smaller, more save, the battery temperature difference can be more uniform.
Particular embodiments described above, technical problem, technical scheme and beneficial effect to the solution of the present invention are carried out
It is further described, should be understood that the specific embodiment that the foregoing is only of the invention, be not limited to
The present invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. should be included in this
Within the protection domain of invention.