CN110048185B - Battery pack cooling system arrangement structure with four-way valve - Google Patents
Battery pack cooling system arrangement structure with four-way valve Download PDFInfo
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- CN110048185B CN110048185B CN201910231772.9A CN201910231772A CN110048185B CN 110048185 B CN110048185 B CN 110048185B CN 201910231772 A CN201910231772 A CN 201910231772A CN 110048185 B CN110048185 B CN 110048185B
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- battery pack
- way valve
- battery
- liquid cooling
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack cooling system arrangement structure with a four-way valve, which comprises a battery core, a battery module liquid cooling plate, a battery pack internal liquid cooling pipeline, a battery pack external liquid cooling pipeline, a battery pack through plate joint first liquid inlet, a battery pack through plate joint second liquid inlet, a four-way valve, a plate heat exchanger, an air conditioning unit assembly and a water pump, wherein the battery core is contacted with the battery module liquid cooling plate, the battery module liquid cooling plate is connected in series and parallel through the battery pack internal liquid cooling pipeline, the battery pack internal liquid cooling pipeline is connected with the battery pack through plate joint first liquid inlet and the battery pack through plate joint second liquid inlet and is connected to the battery pack external liquid cooling pipeline through plate joint, the battery pack external pipeline is connected with the four-way valve and then is connected with the plate heat exchanger in series, the plate heat exchanger is connected with the air conditioning unit in series, and the water pump is connected in a liquid cooling loop, located upstream of the four-way valve.
Description
The technical field is as follows:
the invention relates to a battery pack cooling system arrangement structure with a four-way valve, and belongs to the technical field of new energy automobiles.
Background art:
as a novel energy automobile technology, electric automobiles receive more and more attention due to characteristics of low energy consumption, comfortable riding experience, zero emission and the like. The power battery is the core of the electric automobile and mainly provides energy for the automobile.
As an energy source of the electric automobile, the power battery is a key link for improving the performance of the automobile and reducing the cost. The lithium ion battery is the preferred power battery for the electric automobile because of the advantages of larger specific energy, longer cycle life, lower self-discharge rate, wider allowable working temperature range, good low-temperature effect and the like. However, since the lithium ion battery itself generates a large amount of heat during the discharging process, and the time accumulation and the space influence can generate uneven heat accumulation, the performance of the lithium ion battery is sensitive to the temperature change, the cooling performance directly affects the efficiency of the battery, and the service life and the safety of the battery are also affected.
At present, the cooling modes adopted by the power battery pack of the electric automobile comprise natural cooling, air cooling, liquid cooling and the like. The natural cooling is mainly determined by the heat dissipation performance of the battery, but the cells in the battery pack are connected in a tight arrangement, so the natural cooling effect is not good. The air cooling adopts a fan to cool the battery pack, which is easy to realize, but the cooling effect is limited. Liquid cooling is a relatively effective cooling mode recognized in the industry at present, and through arranging a cooling pipeline in the battery pack, cooling liquid continuously flows and circulates in the pipeline, so that the battery is cooled. Liquid cooling is currently the most effective cooling method, but has a problem: when the battery package coolant liquid entered from the water inlet, coolant liquid temperature was lower this moment, and the electric core cooling effect of water inlet department is good, and after the coolant liquid circulated through the battery package internal pipeline, when discharging from the delivery port, coolant liquid temperature this moment had risen, and the electric core temperature in exit is higher relatively, so the electric core difference in temperature of cooling pipe business turn over water outlet department is great, leads to electric core temperature inhomogeneous, arouses the capacity decay inconsistent. The inconsistent capacity fade is one of the important factors affecting the service life of the battery pack. At present, a water pump is connected to a pipeline between a battery pack and an air conditioning unit, and the rotation direction of the water pump is changed, so that a water inlet and a water outlet of cooling liquid are reversed, and the battery is subjected to temperature equalization. But changing the direction of rotation of the water pump is difficult to achieve, and the water pump reverses to shorten the service life of the water pump. If do not change the coolant liquid flow direction then can lead to the liquid cooling consumption great, appear pipeline anterior segment electricity core already cooled and back end electricity core uncooled phenomenon.
The invention content is as follows:
the invention provides a battery pack cooling system arrangement structure with a four-way valve for solving the problems in the prior art, which can solve the problem of inconsistent temperatures of water inlets and water outlets of electric cores in a battery pack, provide a practical and feasible cooling liquid flow direction conversion method for a liquid-cooled battery pack, further reduce the power of the battery pack cooling system and realize the intelligent control of the battery pack cooling system.
The technical scheme adopted by the invention is as follows: a battery pack cooling system arrangement structure with a four-way valve comprises an electric core, a battery module liquid cooling plate, a battery pack internal liquid cooling pipeline, a battery pack external liquid cooling pipeline, a battery pack board joint first inlet, a battery pack board joint second inlet, a four-way valve, a plate heat exchanger, an air conditioning unit assembly and a water pump, wherein the electric core is contacted with the battery module liquid cooling plate, the battery module liquid cooling plate is connected in series and parallel through the battery pack internal liquid cooling pipeline, the battery pack internal liquid cooling pipeline is connected with the battery pack board joint first inlet and the battery pack board joint second inlet and is connected to the battery pack external liquid cooling pipeline through the board joint, the battery pack external pipeline is connected with the four-way valve and then is connected with a water inlet and a water outlet on one side of the plate heat exchanger, a water inlet and a water outlet on the other side of the plate heat exchanger are connected with a water inlet and a water outlet of the air conditioning unit assembly, the water pump is connected in series in the liquid cooling loop and is positioned at the upstream of the four-way valve, and the upstream is used for enabling the cooling liquid to flow towards the direction of the four-way valve according to the water pump;
the battery pack cooling system arrangement structure with the four-way valve starts a cooling system in a battery pack under a high-temperature working condition, monitors the temperature of a front section battery core of a liquid cooling pipeline to be T1 and the temperature of a rear section battery core to be T2, converts the four-way valve when T2-T1 & ltdelta & gt T, reduces the numerical value of T2-T1,
when the valve core of the four-way valve is pushed to the right side, cooling liquid flows from a first air conditioner water port to a first battery pack water port in the four-way valve, and flows from a second battery pack water port to a second air conditioner water port in the four-way valve after passing through a liquid cooling pipeline in the battery pack;
when the valve core of the four-way valve is pushed to the left side, cooling liquid flows to a water port of a second battery pack from a first water port of the air conditioner inside the four-way valve, and flows to the water port of the second air conditioner from the first water port of the battery pack inside the four-way valve after passing through a liquid cooling pipeline inside the battery pack.
The invention has the following beneficial effects: according to the invention, the four-way valve is connected into the cooling liquid pipeline between the water cooling unit and the battery pack, so that the problem of conversion of the flow direction of the cooling liquid is solved, and the problem of large temperature difference of the battery cell around the water inlet and the water outlet is solved through the conversion of the water inlet and the water outlet; the temperature equalizing function in the battery pack is realized by controlling the four-way valve to be switched for multiple times; the power consumption of the cooling system is reduced, and the intelligent control of the temperature of the battery pack is realized.
Description of the drawings:
fig. 1 is a schematic view of a battery module.
Fig. 2 is a general layout of the cooling system.
FIG. 3 is a schematic diagram of a four-way valve with the spool pushed to the right and its internal coolant flow direction.
FIG. 4 is a schematic diagram of a four-way valve with the spool pushed to the left and its internal coolant flow direction.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
The battery pack cooling system arrangement structure with the four-way valve comprises a battery core 1, a battery module liquid cooling plate 2, a battery pack internal liquid cooling pipeline 3, a battery pack external liquid cooling pipeline 4, a battery pack through plate joint first liquid inlet 5, a battery pack through plate joint second liquid inlet 6, a four-way valve 7, a plate type heat exchanger 8, an air conditioning unit assembly 9 and a water pump 10. Wherein electric core 1 contacts with battery module liquid cooling board 2, produces the heat exchange. The battery module liquid cooling panel 2 is connected in series-parallel through the battery pack internal liquid cooling pipeline 3, the battery pack internal liquid cooling pipeline 3 is connected with the battery pack and passes through the first liquid inlet 5 of the plate joint and the battery pack and passes through the second liquid inlet 6 of the plate joint, and the battery pack external liquid cooling pipeline 4 is connected through the plate joint. The battery pack external pipeline 4 is connected with the four-way valve 7, and then is connected with a water inlet and a water outlet at one side of the plate heat exchanger 8, a water inlet and a water outlet at the other side of the plate heat exchanger 8 are connected with a water inlet and a water outlet of the air conditioning unit assembly 9, the water pump 10 is connected in series in the liquid cooling loop and is positioned at the upstream of the four-way valve 7, and the upstream is used for flowing cooling liquid in the direction of the four-way valve according to the water pump.
The battery pack cooling system arrangement structure with the four-way valve starts a cooling system in a battery pack under a high-temperature working condition, monitors that the temperature of a front section battery cell of a liquid cooling pipeline is T1, the temperature of a rear section battery cell of the liquid cooling pipeline is T2, and converts the four-way valve when T2-T1> delta T, so that the numerical value of T2-T1 is reduced.
When the valve core of the four-way valve is pushed to the right side, cooling liquid flows from a first air conditioner water gap to a first battery pack water gap in the four-way valve, and flows from a second battery pack water gap to a second air conditioner water gap in the four-way valve after passing through a liquid cooling pipeline 3 in the battery pack;
when the valve core of the four-way valve is pushed to the left side, the cooling liquid flows from the first air conditioner water gap to the second battery water gap inside the four-way valve, and flows from the first battery water gap to the second air conditioner water gap inside the four-way valve after passing through the liquid cooling pipeline 3 inside the battery pack
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (1)
1. The utility model provides a take battery package cooling system arrangement structure of cross valve which characterized in that: the air conditioning unit comprises an electric core (1), a battery module liquid cooling plate (2), a battery pack internal liquid cooling pipeline (3), a battery pack external liquid cooling pipeline (4), a battery pack plate joint first inlet (5), a battery pack plate joint second inlet (6), a four-way valve (7), a plate heat exchanger (8), an air conditioning unit assembly (9) and a water pump (10), wherein the electric core (1) is in contact with the battery module liquid cooling plate (2), the battery module liquid cooling plate (2) is connected in series and parallel through the battery pack internal liquid cooling pipeline (3), the battery pack internal liquid cooling pipeline (3) is connected with the battery pack plate joint first inlet (5) and the battery pack plate joint second inlet (6) and is connected to the battery pack external liquid cooling pipeline (4) through the plate joint, the battery pack external pipeline (4) is connected with the four-way valve (7) and then is connected with a water inlet and a water outlet at one side of the plate heat exchanger (8), the water inlet and outlet at the other side of the plate heat exchanger (8) are connected with the water inlet and outlet of an air conditioning unit assembly (9), the water pump (10) is connected in series in the liquid cooling loop and is positioned at the upstream of the four-way valve (7), and the upstream is used for flowing of cooling liquid to the direction of the four-way valve according to the water pump;
the battery pack cooling system arrangement structure with the four-way valve starts a cooling system in a battery pack under a high-temperature working condition, monitors that the temperature of a front section battery cell of a liquid cooling pipeline is T1, the temperature of a rear section battery cell is T2, converts the four-way valve when T2-T1 & ltDELTA & gt, reduces the numerical value of T2-T1,
when the valve core of the four-way valve is pushed to the right side, cooling liquid flows from a first air conditioner water gap to a first battery pack water gap inside the four-way valve, and flows from a second battery pack water gap to a second air conditioner water gap inside the four-way valve after passing through a liquid cooling pipeline (3) inside the battery pack;
when the valve core of the four-way valve is pushed to the left side, cooling liquid flows to a second battery wrapping water port from a first air conditioner water port inside the four-way valve, and flows to the second air conditioner water port from the first battery wrapping water port inside the four-way valve after passing through a liquid cooling pipeline (3) inside the battery wrapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910231772.9A CN110048185B (en) | 2019-03-26 | 2019-03-26 | Battery pack cooling system arrangement structure with four-way valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910231772.9A CN110048185B (en) | 2019-03-26 | 2019-03-26 | Battery pack cooling system arrangement structure with four-way valve |
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| Publication Number | Publication Date |
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| CN110048185A CN110048185A (en) | 2019-07-23 |
| CN110048185B true CN110048185B (en) | 2022-06-17 |
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| CN201910231772.9A Active CN110048185B (en) | 2019-03-26 | 2019-03-26 | Battery pack cooling system arrangement structure with four-way valve |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571498A (en) * | 2019-09-30 | 2019-12-13 | 江西优特汽车技术有限公司 | Energy-conserving liquid cooling system of high efficiency |
| CN112993446A (en) * | 2019-12-18 | 2021-06-18 | 观致汽车有限公司 | Liquid cooling system for battery pack, battery pack and vehicle |
| CN111342164B (en) * | 2020-03-03 | 2020-11-27 | 南京创源天地动力科技有限公司 | Battery pack thermal management system based on four-way valve and variable flow resistance type cold plate combination design |
| CN111416176B (en) * | 2020-04-07 | 2021-07-27 | 奇瑞商用车（安徽）有限公司 | VCU control-based whole vehicle heat dissipation method |
| CN112151912B (en) * | 2020-09-29 | 2022-04-01 | 东风汽车集团有限公司 | Heat management system and control method for flowing of cooling liquid to controllable battery pack |
| CN112652837A (en) * | 2020-12-22 | 2021-04-13 | 长安大学 | Periodic circulating flow lithium ion battery cooling system and cooling method |
| CN113506927B (en) * | 2021-05-14 | 2022-06-14 | 湘潭大学 | Electric automobile liquid cooling system with replaceable flow direction and reversing control method thereof |
| CN113782868B (en) * | 2021-09-10 | 2023-02-14 | 大连理工大学 | Novel electric automobile double-phase submergence formula liquid cooling system and cold start system |
| WO2023122904A1 (en) * | 2021-12-27 | 2023-07-06 | 宁德时代新能源科技股份有限公司 | Thermal management system used for electric vehicle, and electric vehicle |
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| DE10128164A1 (en) * | 2001-06-09 | 2002-12-12 | Behr Gmbh & Co | Vehicle cooling system for a temperature-increasing device and method for cooling the temperature-increasing device |
| CN202076386U (en) * | 2010-12-31 | 2011-12-14 | 比亚迪股份有限公司 | Battery temperature management system and automobile |
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| CN103129348A (en) * | 2011-11-23 | 2013-06-05 | 杭州三花研究院有限公司 | Electric vehicle heat pump system |
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| WO2018028299A1 (en) * | 2016-08-10 | 2018-02-15 | 蔚来汽车有限公司 | Cooling system for pure electric vehicle and vehicle |
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