CN202797185U - Thermal management system for battery - Google Patents

Thermal management system for battery Download PDF

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Publication number
CN202797185U
CN202797185U CN2012204202598U CN201220420259U CN202797185U CN 202797185 U CN202797185 U CN 202797185U CN 2012204202598 U CN2012204202598 U CN 2012204202598U CN 201220420259 U CN201220420259 U CN 201220420259U CN 202797185 U CN202797185 U CN 202797185U
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China
Prior art keywords
thermal management
battery thermal
loop
bypass
heat exchanger
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Application number
CN2012204202598U
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Chinese (zh)
Inventor
高桢
吴旭峰
金启前
由毅
吴成明
赵福全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch
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Application filed by Zhejiang Geely Holding Group Co Ltd, Zhejiang Geely Automobile Research Institute Co Ltd, Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch filed Critical Zhejiang Geely Holding Group Co Ltd
Priority to CN2012204202598U priority Critical patent/CN202797185U/en
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    • 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

Abstract

The utility model discloses a thermal management system for a battery. Based on the thermal management system for a battery in the prior art, the thermal management system for a battery further comprises a first bypass, a second bypass, a first flow path switch component and a second flow path switch component, wherein the first bypass and the second bypass are in parallel with a heat exchanger and an electric heater respectively, and the first flow path switch component and the second flow path switch component are used for controlling the switching of a flow path. The battery thermal management system realizes the effect that when a battery pack is heated or cooled, cooling liquid only needs to flow through necessary heat exchange components to reduce energy dissipation caused by flowing through unnecessary heat exchange components, thereby achieving good cooling and energy saving effects.

Description

Battery thermal management system
Technical field
The utility model relates to the electric automobile field, is specifically related to battery thermal management system.
Background technology
Battery will become main power source in the new-energy automobile, and electrokinetic cell has amount of heat and produces in the charge/discharge process, and battery can because excess Temperature causes performance and life-span to be affected, therefore need timely battery to be cooled off.Under colder weather, also can cross the low battery charging/discharging performance that causes and be affected owing to temperature, need in this case battery is heated.Therefore, be provided with the battery thermal management system that battery is heated/cools off at electric automobile or hybrid vehicle.
Battery thermal management system of the prior art as shown in fig. 1, shown in arrow be the flow direction of cold-producing medium/cooling fluid in the battery thermal management system.Described battery thermal management system comprises air conditioner refrigerating loop 20 and battery thermal management loop 30, and the air conditioner refrigerating loop is used for the cooling fluid in battery thermal management loop is cooled off, and then by cooling fluid the battery that is arranged in the battery thermal management loop is cooled off.Described air conditioner refrigerating loop 20 has the first branch road 21 and the second branch road 22.Air-conditioning condenser 1 is positioned on the air conditioner refrigerating loop 20 with motor compressor 2.Be provided with the first expansion valve 10, evaporation tank 3 at described the first branch road 21, be used for the passenger compartment refrigeration.Be provided with the second expansion valve 11 and heat exchanger 7 at described the second branch road 22, cold-producing medium cools off the cooling fluid in the battery thermal management loop in described heat exchanger 7, and then by cooling fluid the battery that is arranged in the battery thermal management loop is cooled off.Described battery thermal management is provided with on the loop: heat exchanger 7, air separator 8 and fluid reservoir 9, water pump 6, electric heater 4 and the power brick 5 with internal heat interaction loop.When power brick 5 needed heating, described the second expansion valve 11 disconnected, and described electric heater 4 is worked with heated cooling fluid, and then by described battery thermal management loop described power brick is heated.When power brick 5 needs cooling, described electric heater 4 quits work and only as the cooling fluid passage of flowing through, this moment, described cooling fluid was cooled at described heat exchanger 7, and then described cooling fluid circulates in described battery thermal management loop, and described power brick 5 is cooled off.
Because heat exchanger 7 all is heat-exchanging part with electric heater 4 described in the battery thermal management system shown in Fig. 1, when heating battery, the cooling fluid heat exchanger 7 of after electric heater 4 places are heated, can flowing through, distribute heat causes temperature to reduce herein easily, wastes many energy; And when battery was cooled off, cooling fluid also can be carried out heat exchange when flowing through described electric heater 4 after described heat exchanger 7 places are lowered the temperature, and absorbing heat has reduced cooling effectiveness so that coolant temperature raises herein easily, has caused equally energy dissipation.Therefore need to the battery thermal management system that provide in the prior art be further improved, to improve capacity usage ratio, cut the waste.
The utility model content
The utility model provides a kind of battery thermal management system, by two triple valves the electric heater in the battery thermal management loop and heat exchanger is separated, so that only select necessary heat-exchanging part when heating of battery or cooling, has reduced energy dissipation.
Described battery thermal management system comprises air conditioner refrigerating loop and battery thermal management loop; Described air conditioner refrigerating loop comprises that for the evaporator of air conditioner refrigerating and the heat exchanger that is in parallel with described evaporator described heat exchanger is series at and is used for the battery cooling in the described battery thermal management loop; Also comprise on the described battery thermal management loop power brick and electric heater and:
First bypass in parallel with described heat exchanger, an end of described the first bypass is connected to described battery thermal management loop at the upstream end of described heat exchanger, and the other end is connected to described battery thermal management loop at the downstream part of described heat exchanger;
Switch flow through the first stream switching part of described heat exchanger or described the first bypass of cooling fluid, described the first stream switching part is arranged on the described battery thermal management loop and with described the first bypass and is connected;
Second bypass in parallel with described electric heater, an end of described the second bypass is connected to described battery thermal management loop at the upstream end of described electric heater, and the other end is connected to described battery thermal management loop at the downstream part of described electric heater;
Switch flow through the second stream switching part of described electric heater or described the second bypass of cooling fluid, described the second stream switching part is arranged on the described battery thermal management loop and with described the second bypass and is connected.
Preferably, described the first stream switching part is the first triple valve, the entrance of described the first triple valve is connected on the described battery thermal management loop, the first outlet of described the first triple valve connects described heat exchanger, and the second outlet of described the first triple valve is connected on the described battery thermal management loop in described heat exchanger downstream by the first bypass.
Preferably, described the second stream switching part is the second triple valve, the entrance of described the second triple valve is connected on the described battery thermal management loop, the first outlet of described the second triple valve connects described electric heater, and the second outlet of described the second triple valve is connected on the described battery thermal management loop in described electric heater downstream by the second bypass.
Preferably, described electric heater is positioned at the upstream of described power brick.
The first bypass, the second bypass in parallel with heat exchanger and electric heater have respectively been increased on the battery thermal management system basis in the prior art, and the first stream switching part and the second stream switching part of the switching of control stream, realized when heating/cool batteries bag, the heat exchanger components that it is essential that cooling fluid is only flowed through, reduce the energy dissipation that causes because of the unessential heat exchanger components of flowing through, therefore had good energy-saving effect.In addition because the battery thermal management system battery thermal management system change relatively of the prior art that the utility model provides is less, and the parts that increase also all belong to existing procucts on the market, therefore the cost that increases is very low, and can Alternate with original battery thermal management system, need not to change the design of whole automotive battery system.
Description of drawings
Figure 1 shows that battery thermal management system schematic diagram of the prior art;
Figure 2 shows that battery thermal management system structural representation figure of the present utility model, it shows the cooling work state of this battery thermal management system;
Figure 3 shows that the heating work state of battery thermal management system shown in Figure 2.
Embodiment
Figure 2 shows that the structural representation of the battery thermal management system that present embodiment provides, described battery thermal management system comprises air conditioner refrigerating loop 20 and battery thermal management loop 30 as shown in the figure.Be provided with the compressor 2 that is communicated with air-conditioning condenser 1 fluid on the described air conditioner refrigerating loop 20.Described compressor 2 is specifically as follows motor compressor.Enter air-conditioning condenser 1 after cold-producing medium is compressed in compressor 2, in described air-conditioning condenser 1, lowered the temperature, then two branch roads 21 in the selectable air conditioner refrigerating loop 20 of flowing through and 22 return again in the compressor 2 afterwards, so circulate in described air conditioner refrigerating loop 20.
Be provided with first expansion valve 10 of optionally opening or closing on described the first branch road 21, be used for regulating opening or closing of described the first branch road 21.Also be provided with evaporator 3 on described the first branch road 21, be positioned at the downstream of described the first expansion valve 10, be used for providing refrigeration to the crew module of automobile.Be provided with second expansion valve 11 of optionally opening or closing on described the second branch road 22, be used for regulating opening or closing of described the second branch road 22.Also be provided with heat exchanger 7 on described the second branch road, be positioned at the downstream of described the second expansion valve 11, be used for the cooling fluid in battery thermal management loop 30 is cooled off.
Described battery thermal management loop 30 shares described heat exchanger 7 with described air conditioner refrigerating loop 20, and in described heat exchanger 7, the cooling fluid in the cold-producing medium in the described air conditioner refrigerating loop 20 and the described battery thermal management loop 30 is finished heat exchange.Concrete, described refrigerant temperature is lower than described coolant temperature before heat exchange, and through after the heat exchange, described coolant temperature reduces, and described refrigerant temperature raises.
Described battery thermal management loop 30 is provided with power brick 5, electric water pump 6, electric heater 4 and heat exchanger 7.Described battery thermal management loop 30 also comprises: first bypass 14 in parallel with described heat exchanger, one end of described the first bypass 14 is connected to described battery thermal management loop 30 at the upstream end of described heat exchanger 7, and the other end is connected to described battery thermal management loop 30 at the downstream part of described heat exchanger 7.Provided upstream at described heat exchanger 7 is equipped with the first stream switching part, in order to switch described cooling fluid flow through described heat exchanger 7 or described the first bypass 14.Described the first stream switching part is specifically as follows the first triple valve 12, its entrance is connected on the described battery thermal management loop 30, the first outlet links to each other with described heat exchanger 7, the second outlet directly is connected to the downstream of described heat exchanger 7 by the first bypass 14, can select the cooling fluid described heat exchanger 7 of whether flowing through by regulating described the first triple valve 12 like this.
Described battery thermal management loop 30 also comprises: second bypass 15 in parallel with described electric heater 4, one end of described the second bypass 15 is connected to described battery thermal management loop 30 at the upstream end of described electric heater 4, and the other end is connected to described battery thermal management loop 30 at the downstream part of described electric heater 4.Be equipped with in the provided upstream of described electric heater 4 and switch flow through the second stream switching part of described electric heater 4 or described the second bypass 15 of cooling fluid, described the second stream switching part is arranged on the described battery thermal management loop 30 and with described the second bypass 15 and is connected.Described the second stream switching part is specifically as follows the second triple valve 13, the entrance of described the second triple valve 13 is connected on the described battery thermal management loop 30, the first outlet connects described electric heater 4, the second outlet directly is connected on the battery thermal management loop 30 by the second bypass 15, can select the cooling fluid described electric heater 4 of whether flowing through by regulating described the second triple valve 13 like this.
Described power brick can be used for electric motor car or hybrid vehicle, and its inside is provided with heat exchange loop, all battery modules of power brick inside is cooled off when described power brick so that cooling fluid is flowed through or heats.
Further, described battery thermal management loop 30 also comprises air separator 8 and fluid reservoir 9.Described air separator 8 is preferably placed at the downstream of described heat exchanger 7, and described fluid reservoir 9 is connected with described air separator 8.
Described electric water pump 6 can be positioned at the upstream of described the second triple valve 13, and is positioned at the downstream of described air separator 8.
Described power brick 5 can be positioned at the upstream of described the first triple valve 12, and is positioned at the downstream of described electric heater 4.
As shown in Figure 2, when described power brick 5 is cooled off, the second port closing of described the first triple valve 12, the first outlet is opened; The first port closing of described the second triple valve 13 of while, the second outlet is opened.Solid line shown in Fig. 2 partly represents closed path, and dotted portion represents disconnected part, and direction shown in the arrow is the flow direction of cold-producing medium/cooling fluid.This moment, air-conditioning condenser 1 and compressor 2 all were operating states, and described the second expansion valve 11 is opened, flow through compressor 2, air-conditioning condenser 1, the second expansion valve 11 and heat exchanger 7 of refrigerant circulation in air conditioner refrigerating loop 20.Wherein the first branch road 21 is used for crew module's refrigeration, and whether it opens can be determined by the user, does not do too much description at this.In battery thermal management loop 30, flow through successively after cooling fluid is lowered the temperature in heat exchanger 7 air separator 8, electric water pump 6, the second triple valve 13, power brick 5 and the first triple valve 12; When flowing through described power brick 5, finish the cooling to described power brick 5.The cooling fluid described electric heater 4 of not flowing through after the cooling in cooling procedure has been avoided causing energy dissipation because of the described electric heater 4 temperature rising of flowing through like this.
Figure 3 shows that the structural representation when described battery thermal management system heats power brick 5, shown in solid line partly represent closed path, dotted portion represents disconnected part, direction shown in the arrow is the flow direction of cold-producing medium/cooling fluid.This moment described the first triple valve 12 the first port closing, second the outlet open; Shown in the second triple valve 13 first the outlet open the second port closing.Circular flow was through described power brick 5, the first triple valve 12, air separator 8, electric water pump 6 and the second triple valve 13 after cooling fluid was heated in described electric heater 4; When flowing through described power brick 5, finish the heating to power brick 5.By electric heater 4 being arranged on the upstream of described power brick 5, so that cooling fluid is directly used in the heating to power brick 5 after being heated, has avoided cooling in flow process and caused energy dissipation; Simultaneously, the described heat exchanger 7 because cooling fluid is not flowed through has further been avoided energy dissipation, therefore can the Effective Raise capacity usage ratio.The described heat exchanger 7 because described cooling fluid is not flowed through, therefore described the second expansion valve 11 is preferably closed condition, and described the second expansion valve 11 is that open mode can be not influential yet certainly.
In the above-described embodiments, described the first expansion valve 10 and described the second expansion valve 11 are preferably the electronics heating power expansion valve, can certainly be other substitute products.
Above embodiment only is used for the explanation the technical solution of the utility model, is not limited to protection range of the present utility model.The modification that those skilled in the art can carry out the technical solution of the utility model or equal the replacement, and do not break away from the spirit and scope of technical solutions of the utility model.

Claims (5)

1. a battery thermal management system comprises air conditioner refrigerating loop (20) and battery thermal management loop (30); Described air conditioner refrigerating loop (20) comprises the evaporator (3) for air conditioner refrigerating and the heat exchanger (7) that is in parallel with described evaporator (3), and described heat exchanger (7) also is series in the described battery thermal management loop (30); Described battery thermal management loop (30) comprises power brick (5) and electric heater (4); It is characterized in that described battery thermal management loop (30) also comprises:
First bypass (14) in parallel with described heat exchanger (7), one end of described the first bypass (14) is connected to described battery thermal management loop (30) at the upstream end of described heat exchanger (7), and the other end is connected to described battery thermal management loop (30) at the downstream part of described heat exchanger (7);
Switch flow through the first stream switching part of described heat exchanger (7) or described the first bypass of cooling fluid, it is upper and be connected with described the first bypass (14) and described heat exchanger (7) respectively that described the first stream switching part is arranged on described battery thermal management loop (30);
Second bypass (15) in parallel with described electric heater (4), one end of described the second bypass (15) is connected to described battery thermal management loop (30) at the upstream end of described electric heater (4), and the other end is connected to described battery thermal management loop (30) at the downstream part of described electric heater (4);
Switch flow through the second stream switching part of described electric heater (4) or described the second bypass (15) of cooling fluid, it is upper and be connected with described electric heater (4) with described the second bypass (15) respectively that described the second stream switching part is arranged on described battery thermal management loop (30).
2. battery thermal management system according to claim 1, it is characterized in that, described the first stream switching part is the first triple valve (12), the entrance of described the first triple valve (12) is connected on the described battery thermal management loop (30), the first outlet of described the first triple valve (12) connects described heat exchanger (7), and the second outlet of described the first triple valve (12) is connected on the described battery thermal management loop (30) in described heat exchanger (7) downstream by the first bypass (14).
3. battery thermal management system according to claim 2, it is characterized in that, described the second stream switching part is the second triple valve (13), the entrance of described the second triple valve (13) is connected on the described battery thermal management loop (30), the first outlet of described the second triple valve (13) connects described electric heater (4), and the second outlet of described the second triple valve (13) is connected on the described battery thermal management loop (30) in described electric heater (4) downstream by the second bypass (15).
4. battery thermal management system according to claim 1 is characterized in that, described power brick (5) has the internal heat exchange loop.
5. battery thermal management system according to claim 1 is characterized in that, described electric heater (4) is positioned at the upstream of described power brick (5).
CN2012204202598U 2012-08-23 2012-08-23 Thermal management system for battery Active CN202797185U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105539067A (en) * 2016-03-02 2016-05-04 天津三电汽车空调有限公司 Vehicle air-conditioner system with battery heat management function
CN105835653A (en) * 2015-01-14 2016-08-10 北京长城华冠汽车科技有限公司 Centralized multi-operating-condition thermal management system of new energy vehicle
CN107351632A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351634A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351631A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351633A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351629A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
US10263304B2 (en) * 2016-03-02 2019-04-16 Contemporary Amperex Technology Co., Limited Thermal management system of battery pack
CN110112509A (en) * 2019-04-29 2019-08-09 华为技术有限公司 Battery pack heating equipment, heat accumulation equipment and electric car
CN111883874A (en) * 2020-06-01 2020-11-03 浙江吉利汽车研究院有限公司 Variable thermal resistance thermal management system of battery and control method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105835653B (en) * 2015-01-14 2018-11-09 北京长城华冠汽车科技股份有限公司 A kind of centralized multi-state heat management system of new energy vehicle
CN105835653A (en) * 2015-01-14 2016-08-10 北京长城华冠汽车科技有限公司 Centralized multi-operating-condition thermal management system of new energy vehicle
US10263304B2 (en) * 2016-03-02 2019-04-16 Contemporary Amperex Technology Co., Limited Thermal management system of battery pack
CN105539067A (en) * 2016-03-02 2016-05-04 天津三电汽车空调有限公司 Vehicle air-conditioner system with battery heat management function
CN107351631A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351633A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351629A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351634A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351632A (en) * 2016-05-10 2017-11-17 比亚迪股份有限公司 Automotive thermal tube manages system and electric automobile
CN107351629B (en) * 2016-05-10 2019-11-22 比亚迪股份有限公司 Automotive thermal tube manages system and electric car
CN107351633B (en) * 2016-05-10 2019-11-05 比亚迪股份有限公司 Automotive thermal tube manages system and electric car
CN107351632B (en) * 2016-05-10 2019-11-08 比亚迪股份有限公司 Automotive thermal tube manages system and electric car
CN107351634B (en) * 2016-05-10 2019-11-22 比亚迪股份有限公司 Automotive thermal tube manages system and electric car
CN107351631B (en) * 2016-05-10 2019-11-22 比亚迪股份有限公司 Automotive thermal tube manages system and electric car
CN110112509A (en) * 2019-04-29 2019-08-09 华为技术有限公司 Battery pack heating equipment, heat accumulation equipment and electric car
CN111883874A (en) * 2020-06-01 2020-11-03 浙江吉利汽车研究院有限公司 Variable thermal resistance thermal management system of battery and control method
CN111883874B (en) * 2020-06-01 2021-09-07 浙江吉利汽车研究院有限公司 Variable thermal resistance thermal management system of battery and control method

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