CN108963368B - Flow testing method and device for thermal management pipeline of power battery of electric automobile - Google Patents
Flow testing method and device for thermal management pipeline of power battery of electric automobile Download PDFInfo
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- CN108963368B CN108963368B CN201810621161.0A CN201810621161A CN108963368B CN 108963368 B CN108963368 B CN 108963368B CN 201810621161 A CN201810621161 A CN 201810621161A CN 108963368 B CN108963368 B CN 108963368B
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
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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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Abstract
The embodiment of the invention discloses a flow testing method and device for a thermal management pipeline of a power battery of an electric automobile. The method comprises the following steps: arranging a contact type flowmeter, a heating component and a refrigerating component in a main cooling liquid loop of a thermal management pipeline, and recording a first flow reading of the contact type flowmeter; removing a contact type flowmeter, a heating component and a refrigerating component from a main cooling liquid loop of a thermal management pipeline, arranging a first non-contact type flowmeter and a regulating valve in the main cooling liquid loop, removing a battery pack in each branch pipeline, and respectively arranging a water chamber component in each branch pipeline; adjusting an opening of the regulating valve such that a flow reading of the first non-contact flow meter equals the first flow reading; a flow reading in each branch line is read using a second non-contact flow meter. The embodiment of the invention reduces heat management connecting parts, has simple structure, easy realization, time and material cost reduction, improved measurement accuracy, large installation space and easy operation.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a flow testing method and device for a thermal management pipeline of a power battery of an electric automobile.
Background
The shortage of energy, the petroleum crisis and the environmental pollution are getting more and more severe, which brings great influence to the life of people and is directly related to the sustainable development of national economy and society. New energy technologies are actively developed in all countries of the world. An electric vehicle is considered as an important approach to solve energy crisis and environmental deterioration as a new energy vehicle with reduced oil consumption, low pollution and low noise.
In an electric vehicle, a power battery drives a motor to generate power, so the performance and the service life of the power battery are key factors influencing the performance of the electric vehicle. Because the space on the vehicle is limited, a large amount of heat generated by the battery in the working process is accumulated under the influence of the space, so that the temperature is uneven at each position to influence the consistency of the battery monomer, thereby reducing the charge-discharge cycle efficiency of the battery, influencing the power and energy exertion of the battery, causing thermal runaway in severe cases and influencing the safety and reliability of the system. The heat management technology is generally applied to the field of electric automobiles, and is particularly applied to temperature management of power batteries of the electric automobiles. The heat management technology is applied to the power battery of the electric automobile, so that the temperature of the power battery can be well controlled or adjusted no matter the power battery is in a high-temperature or low-temperature environment or under the condition that heat is generated in the charging and discharging process, the power battery can always work in a proper temperature range, the good performance of the battery is exerted, and the effects of prolonging the service life of the battery and increasing the endurance mileage of the battery are achieved.
The heat management mode is basically divided into an air cooling mode and a liquid cooling mode. Liquid cooling is a more complex and effective way of thermal management than air cooling. Since the liquid cooling mode is to utilize the liquid flow in the pipeline to exchange heat with the batteries, the flow rate should be kept uniform in the heat exchange of each battery, which is the basis for keeping the temperature of each battery uniform and calculating the thermal efficiency uniformity of the flow field.
In the prior art, in the flow test of a liquid cooling heat management pipeline, in order to simulate a real vehicle, a contact type flow test with a power battery pack is generally adopted, and the defects at least comprise the following points:
(1) the model that adopts each battery package to build carries out flow test, especially to the pipeline that connects in parallel, has a plurality of flow test points, then its installation contact flowmeter numerous or installation retest number of times is many, time and material cost increase, and its installation contact flowmeter's position space is narrow and small, and difficult operation, or can't install contact flowmeter at all, can not accurately measure each pipeline flow.
(2) The front cabin heat management component of the electric automobile is usually arranged in a real-vehicle mode, a heating or refrigerating pipeline and components of the heating or refrigerating pipeline cannot be omitted, and the component cost and the building complexity are increased.
(3) The contact flowmeter is mostly installed inside a pipeline in use, flow pressure loss is easily formed in the contact flowmeter, and the flow of the pipeline cannot be accurately measured.
Disclosure of Invention
The invention aims to provide a flow testing method and a flow testing device for a thermal management pipeline of a power battery of an electric automobile, so that the time and material cost is reduced.
A flow testing method of a thermal management pipeline of a power battery of an electric automobile, wherein the thermal management pipeline comprises a main cooling liquid loop and a plurality of branch pipelines respectively connected to the main cooling liquid loop, and a battery pack containing a water chamber component is arranged in each branch pipeline, and the method comprises the following steps:
arranging a contact flow meter, a heating component and a cooling component in a main cooling liquid loop of the thermal management pipeline, and recording a first flow reading of the contact flow meter;
removing the contact-type flow meter, the heating component and the refrigerating component from a main cooling liquid loop of the heat management pipeline, arranging a first non-contact-type flow meter and a regulating valve in the main cooling liquid loop, removing the battery pack in each branch pipeline, and arranging a water chamber component in each branch pipeline respectively;
adjusting an opening of the regulating valve such that a flow reading of the first non-contact flow meter is equal to the first flow reading;
a flow reading in each branch line is read using a second non-contact flow meter.
In one embodiment, the method further comprises:
and judging whether the difference value between the flow reading of the second non-contact flow meter and the preset reading is larger than a preset threshold value or not, and if so, judging that the branch pipeline where the second non-contact flow meter is positioned is unqualified.
In one embodiment, the reading the flow reading in each branch line with the second non-contact flow meter comprises:
arranging the second non-contact flow meter in each branch line, respectively;
simultaneously reading flow readings of each of the second non-contact flow meters.
In one embodiment, the reading the flow reading in each branch line with the second non-contact flow meter comprises:
time-division multiplexing the second non-contact flow meter in each branch line;
and reading the flow readings of the second non-contact flow meter in a time-sharing manner.
A flow test device of a heat management pipeline of a power battery of an electric automobile, wherein the heat management pipeline comprises a main cooling liquid loop and a plurality of branch pipelines respectively connected to the main cooling liquid loop, a battery pack containing a water chamber component is arranged in each branch pipeline, and the flow test device comprises:
the system comprises a first arrangement module, a second arrangement module and a control module, wherein the first arrangement module is used for arranging a contact type flowmeter, a heating component and a refrigerating component in a main cooling liquid loop of the thermal management pipeline and recording a first flow reading of the contact type flowmeter;
a second arrangement module for removing the contact flow meter, the heating component and the cooling component from the main cooling liquid loop of the thermal management pipeline, arranging a first non-contact flow meter and a regulating valve in the main cooling liquid loop, removing the battery pack in each branch pipeline, and arranging a water chamber component and a second non-contact flow meter in each branch pipeline respectively;
an adjustment module to adjust an opening of the adjustment valve such that a flow reading of the first non-contact flow meter equals the first flow reading;
a reading module for reading the flow readings in each branch line using a second non-contact flow meter.
In one embodiment, the reading module is further configured to determine whether a difference between a flow reading of the second non-contact flow meter and a predetermined reading is greater than a predetermined threshold value, and if so, determine that the branch line in which the second non-contact flow meter is located is not qualified.
In one embodiment, a reading module for arranging the second non-contact flow meter in each branch line, respectively; simultaneously reading flow readings of each of the second non-contact flow meters.
In one embodiment, a read module for time-multiplexing the second non-contact flow meter in each branch line; and reading the flow readings of the second non-contact flow meter in a time-sharing manner.
A battery management system comprising a flow test apparatus as described above.
An electric vehicle comprising a battery management system as described above.
As can be seen from the above technical solutions, the embodiments of the present invention include: arranging a contact type flowmeter, a heating component and a refrigerating component in a main cooling liquid loop of a thermal management pipeline, and recording a first flow reading of the contact type flowmeter; removing a contact type flowmeter, a heating component and a refrigerating component from a main cooling liquid loop of a thermal management pipeline, arranging a first non-contact type flowmeter and a regulating valve in the main cooling liquid loop, removing a battery pack in each branch pipeline, and respectively arranging a water chamber component in each branch pipeline; adjusting an opening of the regulating valve such that a flow reading of the first non-contact flow meter equals the first flow reading; a flow reading in each branch line is read using a second non-contact flow meter. Therefore, the adjusting valve component is used for replacing the cabin heat management component (the heating component and the cooling component), the number of heat management connecting components is reduced, the structure is simpler, the implementation is easy, and the cost is reduced.
In addition, the water chamber in the battery pack replaces the whole battery pack, so that the water chamber and the flowmeter are convenient and simple to install, the installation space is large, the operation is easy, and the flow accuracy test is not influenced.
In addition, the embodiment of the invention adopts the non-contact flowmeter, so that pressure and flow loss are avoided, the measurement accuracy is improved, and the installation is more convenient.
Furthermore, embodiments of the present invention may also time-multiplex the non-contact flow meters during the measurement process, thereby reducing the number requirements for the non-contact flow meters and thereby further reducing the expensive cost.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
Fig. 1 is a flowchart of a flow testing method of a thermal management pipeline of a power battery of an electric vehicle according to the invention.
Fig. 2 is a schematic of a flow test based on a battery pack containing water chamber components and a contact flow meter.
Fig. 3 is a first schematic diagram of a non-contact flow meter based flow test according to the present invention, wherein a non-contact flow meter is arranged in each branch line.
Fig. 4 is a second schematic diagram of a non-contact flowmeter based flow test according to the present invention, wherein the non-contact flowmeter is time-multiplexed in each branch line.
Fig. 5 is a third schematic diagram of a non-contact flowmeter based flow test according to the present invention, wherein the non-contact flowmeter is time-multiplexed in each branch line.
Fig. 6 is a structural diagram of a flow testing device of a thermal management pipeline of a power battery of an electric vehicle according to the invention.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout.
For simplicity and clarity of description, the invention will be described below by describing several representative embodiments. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It will be apparent, however, that the invention may be practiced without these specific details. Some embodiments are not described in detail, but rather are merely provided as frameworks, in order to avoid unnecessarily obscuring aspects of the invention. Hereinafter, "including" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.
Fig. 1 is a flowchart of a flow testing method of a thermal management pipeline of a power battery of an electric vehicle according to the invention. The heat management piping includes a main cooling liquid circuit and a plurality of branch pipes connected to the main cooling liquid circuit, respectively, and a battery pack including a water chamber member is disposed in each of the branch pipes.
As shown in fig. 1, the method includes:
step 101: a contact flow meter, a heating component, and a cooling component are disposed in a main coolant loop of a thermal management pipeline, and a first flow reading of the contact flow meter is recorded.
Here, referring to the branch line flow rate test method of the related art, a contact flow meter, a heating component and a cooling component may be arranged in a main cooling liquid loop of the thermal management line, wherein a water pump is already arranged in the main cooling liquid loop, and a battery pack including a water chamber component is arranged in each branch line, and a respective contact flow meter is arranged in each branch line in which the respective battery pack is arranged, so as to measure the flow rate of each branch line. And the contact type flowmeter is arranged in the main cooling liquid loop and used for measuring the flow of the main cooling liquid loop. A first flow reading of a contact flow meter disposed in the main coolant loop is recorded.
Fig. 2 is a schematic of a flow test based on a battery pack containing water chamber components and a contact flow meter.
As can be seen from fig. 2, the main cooling liquid circuit contains a pump, a contact flow meter connected to the pump, a cooling component and a heating component. The refrigerating and heating parts include heater, compressor and its refrigerating pipeline, heat exchanger, etc. A plurality of branch lines are connected to the main coolant circuit, respectively, each branch line including a battery pack including a water chamber member and a contact type flow meter connected to the battery pack.
Based on the description of step 101, a first flow reading of the contact flow meter in the main coolant loop is recorded, i.e., a flow value in the main coolant loop is recorded.
Step 102: the method comprises the steps of removing a contact type flowmeter, a heating component and a refrigerating component from a main cooling liquid loop of a heat management pipeline, arranging a first non-contact type flowmeter and a regulating valve in the main cooling liquid loop, removing a battery pack in each branch pipeline, and arranging a water chamber component in each branch pipeline respectively.
Here, for the measurement architecture shown in fig. 2, the contact flow meter, the heating component and the cooling component are removed in the main cooling liquid loop of the thermal management pipeline, and the first non-contact flow meter and the regulating valve are arranged in the main cooling liquid loop. Also, the battery pack in each branch line is removed, and a water chamber part is disposed in each branch line, respectively. That is, for each branch line, the battery pack (including the water chamber member) disposed in the branch line is removed, and the water chamber member in the removed battery pack is disposed.
Step 103: the opening of the regulating valve is adjusted so that the flow reading of the first non-contact flow meter is equal to the first flow reading.
Here, the flow reading of the first non-contact flow meter is made equal to the first flow reading by adjusting the opening of the regulating valve. Therefore, the flow resistance of the regulating valve with the opening degree regulated is equivalent to the flow resistance of the removed contact flow meter, the heating component and the cooling component, so that the removed contact flow meter, the heating component and the cooling component can be replaced. Moreover, compared with the structure shown in fig. 2, the heat management connecting parts of the regulating valve are obviously reduced, the structure is simpler, the realization is easy, and the cost is reduced.
Step 104: a flow reading in each branch line is read using a second non-contact flow meter.
Here, the flow readings in each branch line are read using a second non-contact flow meter so that a flow measurement for each branch line can be taken.
In one embodiment, the method further comprises: and judging whether the difference value between the flow reading of the second non-contact flow meter and the preset reading is larger than a preset threshold value or not, and if so, judging that the branch pipeline where the second non-contact flow meter is positioned is unqualified.
Thus, by comparing the difference between the flow readings of the various branch lines with a predetermined reading, a non-conforming branch line with an unbalanced flow can be found.
In one embodiment, reading the flow readings in each branch line with the second non-contact flow meter comprises:
arranging a second non-contact flow meter in each branch pipeline respectively; and simultaneously reading the flow readings of each second non-contact flow meter.
Fig. 3 is a first schematic diagram of a non-contact flow meter based flow test according to the present invention, wherein a non-contact flow meter is arranged in each branch line.
As can be seen in fig. 3, the main coolant circuit contains a pump and a first non-contact flow meter. Wherein the opening of the regulating valve is regulated such that the flow reading of the first non-contact flow meter is equal to the first flow reading of the contact flow meter arranged in the main cooling liquid circuit in figure 2.
In fig. 3, a plurality of branch lines, each including a water chamber in the removed battery pack, are connected to the main coolant circuit, respectively. Each branch line contains a respective non-contact flow meter for measuring the flow of the respective branch line. The number of the water chambers is n, and the water chambers are water chamber 1 and water chamber 2 …. A second non-contact flow meter 1 is arranged in the branch pipeline of the water chamber 1, and the second non-contact flow meter 1 is used for measuring the flow of the branch pipeline of the water chamber 1; a second non-contact flow meter 2 is arranged in the branch line of the water chamber 2, the second non-contact flow meter 2 is used to measure the flow rate … of the branch line of the water chamber 2, and a second non-contact flow meter n is arranged in the branch line of the water chamber n, the second non-contact flow meter n is used to measure the flow rate of the branch line of the water chamber n.
Therefore, the embodiment of the invention can arrange the second non-contact flow meters in each branch pipeline simultaneously and read the flow readings of the second non-contact flow meters simultaneously, thereby realizing the batch and quick acquisition of the flow measurement values of the branch pipelines.
In one embodiment, reading the flow readings in each branch line with the second non-contact flow meter comprises: time-division multiplexing a second non-contact flow meter in each branch line; and reading the flow readings of the second non-contact flow meter in a time-sharing manner.
Fig. 4 is a second schematic diagram of a non-contact flowmeter based flow test according to the present invention, wherein the non-contact flowmeter is time-multiplexed in each branch line. Fig. 5 is a third schematic diagram of a non-contact flowmeter based flow test according to the present invention, wherein the non-contact flowmeter is time-multiplexed in each branch line.
In fig. 4 and 5, the main cooling liquid circuit includes a pump and a first non-contact flow meter, and a plurality of branch lines each including a water chamber in the removed battery pack are connected to the main cooling liquid circuit, respectively. In fig. 4 and 5, the opening of the regulating valve is regulated so that the flow reading of the first non-contact flow meter is equal to the first flow reading of the contact flow meter arranged in the main cooling liquid circuit in fig. 2.
In fig. 4, a second non-contact flow meter is arranged in the branch line where the water chamber 1 is located, for measuring the flow rate of the branch line where the water chamber 1 is located. However, it is possible to remove the second non-contact flow meter from the branch line in which the water chamber 1 is located and to arrange the second non-contact flow meter into the branch line in which the water chamber 2 is located for measuring the flow rate of the branch line in which the water chamber 2 is located. By analogy, as shown in fig. 5, a second non-contact flow meter is arranged into the branch line where the water chamber n is located for measuring the flow rate of the branch line where the water chamber n is located.
Thus, embodiments of the present invention may time-multiplex the same second non-contact flow meter in each branch line, thereby reducing the number of requirements for the non-contact flow meter and thus reducing costs.
Therefore, in the embodiment of the invention, the regulating valve component is used for replacing the cabin heat management component (comprising the heating component and the cooling component), the total flow resistance and the total flow of the front part and the rear part are consistent through the regulating valve, the heat management connecting component is reduced, the structure is simpler, the realization is easy, and the cost is reduced.
In addition, in the embodiment of the invention, the water chamber in the battery pack is used for replacing the whole battery pack, so that the water chamber and the flowmeter are convenient and simple to install, the installation space is large, the operation is easy, and the flow accuracy test is not influenced.
In addition, in the embodiment of the invention, a non-contact flow meter is adopted instead of a contact flow meter, so that pressure and flow loss are avoided, the measurement accuracy is improved, and the installation is more convenient. In addition, the embodiment of the invention can multiplex the non-contact flowmeter in a time-sharing manner in the measuring process, thereby reducing the cost.
A typical application of the embodiment of the present invention is described below. Firstly, connecting a regulating valve and a pump by pipelines with the same material and inner diameter of a real vehicle to form an equivalent flow resistance component of a heating component and a refrigerating component; then, arranging water chambers according to a topological structure of the arrangement of the battery packs of the real vehicle, wherein the spatial arrangement of the geometric dimension of the water chambers is the same as that of the real vehicle; then, connecting each branch pipeline with a water chamber; connecting a heating and refrigerating equivalent flow resistance component consisting of a regulating valve and a pump with each water chamber and branch pipeline components; the main pipeline and the branch pipeline are connected with a non-contact flow meter; high and low temperature resistant liquid cooling media such as antifreeze are added into the pipeline; turning on a water pump to operate and exhaust until the exhaust is clean; adjusting a valve to enable the total flow of the pipeline to be equal to the equivalent total flow of the real vehicle; reading flow data when a display signal of the flowmeter is stable; turning off the water pump, waiting for a period of time to start again, and reading out secondary flow data; and repeating the flow test for three times, and taking the average value of the three flows as the final flow value of each pipeline.
Based on the above description, the embodiment of the invention also provides a flow testing device for the thermal management pipeline of the power battery of the electric automobile.
Fig. 6 is a structural diagram of a flow testing device of a thermal management pipeline of a power battery of an electric vehicle according to the invention. The heat management pipeline comprises a main cooling liquid loop and a plurality of branch pipelines respectively connected to the main cooling liquid loop, and a battery pack containing a water chamber component is arranged in each branch pipeline. This flow test device includes:
a first arrangement module 601, configured to arrange a contact flow meter, a heating component and a cooling component in a main cooling liquid loop of the thermal management pipeline, and record a first flow reading of the contact flow meter;
a second arrangement module 602, configured to remove the contact flow meter, the heating component, and the cooling component from the main cooling liquid loop of the thermal management pipeline, arrange the first non-contact flow meter and the regulating valve in the main cooling liquid loop, remove the battery pack from each branch pipeline (after removing the battery pack, a water chamber may be used to measure multiple pipeline topologies for continuous improvement of multiple research and development pipelines), and arrange the water chamber component and the second non-contact flow meter in each branch pipeline, respectively;
an adjusting module 603 configured to adjust an opening of an adjusting valve such that a flow reading of the first non-contact flow meter is equal to the first flow reading;
a reading module 604 for reading the flow readings in each branch line using a second non-contact flow meter.
In one embodiment, the reading module 604 is further configured to determine whether a difference between a flow reading of the second non-contact flow meter and a predetermined reading is greater than a predetermined threshold value, and if so, determine that the branch line in which the second non-contact flow meter is located is not qualified.
In one embodiment, a reading module 604 for arranging the second non-contact flow meter in each branch line, respectively; simultaneously reading flow readings of each of the second non-contact flow meters.
In one embodiment, a reading module 604 for time-multiplexing the second non-contact flow meter in each branch line; and reading the flow readings of the second non-contact flow meter in a time-sharing manner.
The flow testing method provided by the embodiment of the invention can be applied to a battery management system, and can be applied to various electric vehicles, such as Hybrid Electric Vehicles (HEV), pure electric vehicles (BEV), Fuel Cell Electric Vehicles (FCEV), other new energy vehicles (such as efficient energy storage devices like super capacitors and flywheels), and the like.
In summary, a contact flow meter, a heating component and a cooling component are arranged in a main cooling liquid loop of a thermal management pipeline, and a first flow reading of the contact flow meter is recorded; removing a contact type flowmeter, a heating component and a refrigerating component from a main cooling liquid loop of a thermal management pipeline, arranging a first non-contact type flowmeter and a regulating valve in the main cooling liquid loop, removing a battery pack in each branch pipeline, and respectively arranging a water chamber component in each branch pipeline; adjusting an opening of the regulating valve such that a flow reading of the first non-contact flow meter equals the first flow reading; a flow reading in each branch line is read using a second non-contact flow meter. Therefore, the adjusting valve component is used for replacing the cabin heat management component (the heating component and the cooling component), the number of heat management connecting components is reduced, the structure is simpler, the implementation is easy, and the cost is reduced.
In addition, the water chamber in the battery pack replaces the whole battery pack, so that the water chamber and the flowmeter are convenient and simple to install, the installation space is large, the operation is easy, and the flow accuracy test is not influenced.
In addition, the embodiment of the invention adopts the non-contact flowmeter, so that pressure and flow loss are avoided, the measurement accuracy is improved, and the installation is more convenient.
Furthermore, embodiments of the present invention may also time-multiplex the non-contact flow meters during the measurement process, thereby reducing the number requirements for the non-contact flow meters and thereby further reducing costs.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention and is not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of the features without departing from the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A flow testing method of a thermal management pipeline of a power battery of an electric automobile is characterized in that the thermal management pipeline comprises a main cooling liquid loop and a plurality of branch pipelines respectively connected to the main cooling liquid loop, and a battery pack comprising a water chamber is arranged in each branch pipeline, and the method comprises the following steps:
arranging a contact flow meter, a heating component and a cooling component in a main cooling liquid loop of the thermal management pipeline, and recording a first flow reading of the contact flow meter;
removing the contact-type flow meter, the heating component and the refrigerating component from a main cooling liquid loop of the thermal management pipeline, arranging a first non-contact-type flow meter and a regulating valve in the main cooling liquid loop, removing the battery pack in each branch pipeline, and arranging a water chamber in each branch pipeline respectively;
adjusting an opening of the regulating valve such that a flow reading of the first non-contact flow meter is equal to the first flow reading;
a flow reading in each branch line is read using a second non-contact flow meter.
2. The method for testing the flow of the thermal management pipeline of the power battery of the electric automobile according to claim 1, further comprising the following steps of:
and judging whether the difference value between the flow reading of the second non-contact flow meter and the preset reading is larger than a preset threshold value or not, and if so, judging that the branch pipeline where the second non-contact flow meter is positioned is unqualified.
3. The method for testing the flow of the thermal management pipeline of the power battery of the electric vehicle according to claim 1, wherein the reading the flow reading in each branch pipeline by using the second non-contact flow meter comprises:
arranging the second non-contact flow meter in each branch line, respectively;
simultaneously reading flow readings of each of the second non-contact flow meters.
4. The method for testing the flow of the thermal management pipeline of the power battery of the electric vehicle according to claim 1, wherein the reading the flow reading in each branch pipeline by using the second non-contact flow meter comprises:
arranging the second non-contact flow meter in a branch line to measure a flow rate of the branch line;
the second non-contact flow meter in the branch line is removed and the second non-contact flow meter is arranged into the further branch line to measure the flow of the further branch line.
5. The utility model provides an electric automobile power battery thermal management pipeline's flow testing arrangement which characterized in that, thermal management pipeline includes coolant liquid main loop and is connected to respectively a plurality of branch pipelines of coolant liquid main loop, has arranged the battery package that contains the hydroecium in every branch pipeline, flow testing arrangement includes:
the system comprises a first arrangement module, a second arrangement module and a control module, wherein the first arrangement module is used for arranging a contact type flowmeter, a heating component and a refrigerating component in a main cooling liquid loop of the thermal management pipeline and recording a first flow reading of the contact type flowmeter;
a second arrangement module for removing the contact flow meter, the heating component and the cooling component from a main cooling liquid loop of the thermal management pipeline, arranging a first non-contact flow meter and a regulating valve in the main cooling liquid loop, removing the battery pack in each branch pipeline, and arranging a water chamber and a second non-contact flow meter in each branch pipeline respectively;
an adjustment module to adjust an opening of the adjustment valve such that a flow reading of the first non-contact flow meter equals the first flow reading;
a reading module for reading the flow readings in each branch line using a second non-contact flow meter.
6. The flow rate testing device of the thermal management pipeline of the power battery of the electric automobile according to claim 5,
and the reading module is also used for judging whether the difference value between the flow reading of the second non-contact flow meter and the preset reading is larger than a preset threshold value or not, and if so, judging that the branch pipeline where the second non-contact flow meter is positioned is unqualified.
7. The flow rate testing device of the thermal management pipeline of the power battery of the electric automobile according to claim 5,
a reading module for arranging the second non-contact flow meters in each branch line, respectively; simultaneously reading flow readings of each of the second non-contact flow meters.
8. The flow rate testing device of the thermal management pipeline of the power battery of the electric automobile according to claim 5,
a reading module for arranging a second non-contact flow meter in each branch line to read a flow reading of the branch line; the second non-contact flow meter in the branch line is removed and the second non-contact flow meter is placed into the further branch line to read a flow reading of the further branch line.
9. A battery management system comprising the flow test apparatus of claim 5.
10. An electric vehicle characterized by comprising the battery management system according to claim 9.
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