CN114001986A - Heat exchange amount testing device and method for battery box heat exchanger - Google Patents

Heat exchange amount testing device and method for battery box heat exchanger Download PDF

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Publication number
CN114001986A
CN114001986A CN202111093900.1A CN202111093900A CN114001986A CN 114001986 A CN114001986 A CN 114001986A CN 202111093900 A CN202111093900 A CN 202111093900A CN 114001986 A CN114001986 A CN 114001986A
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China
Prior art keywords
heat exchanger
battery
box
heat exchange
battery simulation
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CN202111093900.1A
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Chinese (zh)
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郑时红
赵云鹏
茅新波
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Hangzhou Yifei Heat Exchange Technology Co ltd
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Hangzhou Yifei Heat Exchange Technology Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00Subject matter not provided for in other groups of this subclass
    • G01M99/002Thermal testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00Subject matter not provided for in other groups of this subclass
    • G01M99/005Testing of complete machines, e.g. washing-machines or mobile phones

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  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The application relates to a heat exchange quantity testing device and method of a battery box heat exchanger, the device comprises a battery simulation box, a heat exchanger, a circulating unit, an analysis control system and an air duct system, wherein the heat exchanger is placed outside the battery simulation box and is in direct contact with the exposed surface of the battery simulation box or is placed inside the battery simulation box, the circulating unit is connected with the heat exchanger to form a circulating pipeline of a heat exchange medium, the analysis control system is respectively connected with the battery simulation box, the heat exchanger and the circulating unit, the air duct system comprises an air duct wall, and the battery simulation box and the heat exchanger are arranged in the air duct wall. Through the heat exchange quantity testing device and method, the heat exchange relation between the heat exchanger and the battery box can be truly simulated, and accurate and reliable data support is provided for the design scheme of the heat exchanger.

Description

Heat exchange amount testing device and method for battery box heat exchanger
Technical Field
The application relates to a heat exchange amount testing device and method of a battery box heat exchanger, and is applicable to the technical field of battery testing.
Background
The battery box is widely applied to different industrial fields such as computer equipment, electrical equipment, new energy automobiles and the like. The battery box can produce a large amount of heats at the during operation, if the heat can not in time distribute away, can arouse the explosion of battery box, therefore the heat exchanger of battery box can be through the operating temperature of strict accurate design in order to guarantee the battery box.
For example, in the application of new energy vehicles, the endurance mileage of the vehicles and the service life of the batteries in extremely low temperature and extremely high temperature environments are still problematic. The new energy automobile battery has a heat release or heat absorption process in the charging process or the discharging process of the vehicle running battery. In order to maintain the normal operation of the electrochemical reaction of the battery, the battery needs to be maintained in a certain range of temperature environment, so that a part of the electric energy of the new energy automobile battery is used for heat exchange to maintain the ambient temperature of the battery by maintaining the temperature of a battery box, for example. The excessive use of the part of electric energy will affect the endurance mileage of the vehicle, so that the efficiency of the heat exchanger for refrigeration and heat exchange is effectively improved, the electric quantity required by temperature maintenance of the battery box is reduced, and the method is one of effective means for improving the endurance mileage of the new energy automobile at present.
After the heat exchanger is designed, the heat exchange capacity of the heat exchanger needs to be tested to verify the reliability of the design scheme, and how to design a heat exchange capacity test scheme makes the test result have high efficiency and reliability, which becomes a technical problem to be solved urgently in the industry.
Disclosure of Invention
The application provides a heat exchange amount testing device and method of a battery box heat exchanger, technical performance parameters of the heat exchanger are provided in design, manufacture and application of the heat exchanger, and the device and method have the technical advantages that testing results are efficient and reliable.
According to the application, heat transfer volume testing arrangement of battery box heat exchanger, including battery simulation case, heat exchanger, circulation unit, analysis control system and air duct system, the heat exchanger is placed the outside of battery simulation case and with the exposed surface direct contact of battery simulation case perhaps the heat exchanger is placed the inside of battery simulation case, the circulation unit with the heat exchanger is connected and is formed with the circulation pipeline of heat transfer medium, analysis control system connects respectively battery simulation case the heat exchanger with the circulation unit, air duct system includes the wind channel wall, battery simulation case with the heat exchanger sets up in the wind channel wall.
The battery simulation box can comprise a box shell, a heating wire and a fan, wherein the heating wire and the fan are arranged in the box shell; the heating wire can be externally connected with a power supply through a voltage regulator to form a heating loop, an electric energy meter is arranged on the heating loop, and the electric energy meter is connected with the analysis control system; the circulating unit can comprise a pump, a second heat exchanger and a flow control valve which are connected to a heat exchange medium circulating pipeline; a fan can be arranged in the circulating unit to exchange heat with a second heat exchanger of the circulating unit; the duct system may include a fan, an energy supply system, and a duct wall.
The application also relates to a heat exchange quantity testing method of the battery box heat exchanger, which utilizes the heat exchange quantity testing device to test and comprises the following steps:
(1) installing a heat exchanger, and connecting an interface of the heat exchanger with an interface of a circulating unit in a sealing manner;
(2) mounting and fixing the battery simulation box and the heat exchanger;
(3) starting an air duct system, adjusting operating parameters of a fan and an energy supply system, and adjusting air flow parameters required in an air duct to values required by testing;
(4) starting an electric heating wire in the battery simulation box, and gradually increasing the temperature and the energy load in the battery simulation box to the values required by the test by adjusting an external voltage regulator;
(5) starting a circulating unit to provide a circulating heat exchange medium for the heat exchanger;
(6) after the whole testing device is operated for a period of time, when the fluctuation value of each performance parameter obtained by the analysis control system in the specified time meets the requirement, the operation of the device is stopped, and the test is finished;
(7) and analyzing and calculating the data obtained by the analysis control system to obtain the performance parameters of the heat exchanger.
Through the heat exchange quantity testing device and method, the heat exchange relation between the heat exchanger and the battery box can be truly simulated, and accurate and reliable data support is provided for the design scheme of the heat exchanger.
Drawings
Fig. 1 is a schematic diagram of a heat exchange amount testing device of a battery box heat exchanger according to the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict. The specific embodiments of the present application are described by taking a battery box heat exchanger for a new energy automobile as an example, and those skilled in the art will understand that the description is only for illustrative purposes and should not be construed as limiting the scope of protection.
The heat exchange amount testing device of the battery box heat exchanger is shown in fig. 1 and comprises a battery simulation box 1, a heat exchanger 2, a circulating unit 3, an analysis control system 4 and an air duct system 5. The heat exchanger 2 may be placed outside the battery simulation case 1 and in direct contact with the exposed surface of the battery simulation case 1 or the heat exchanger 2 may be placed inside the battery simulation case 1. The circulating unit 3 is connected with the heat exchanger 2 to form a circulating pipeline of a heat exchange medium. The analysis control system 4 is respectively connected with the battery simulation box 1, the heat exchanger 2 and the circulating unit 3. The air duct system 5 includes an air duct wall 53, and the battery simulation box 1 and the heat exchanger 2 are disposed inside the air duct wall 53.
The battery simulation box 1 is used for simulating the heating of the battery in the battery box to enable the temperature of the battery box to rise, and then the heat exchanger 2 is used for providing energy conversion to form heat transfer between the battery simulation box 1 and the heat exchanger 2, so that the temperature in the battery box is in a required range. The circulating unit 3 provides a circulating heat exchange medium for the heat exchanger 2, and the analysis control system 4 collects relevant parameters on the battery simulation box 1, the heat exchanger 2, the circulating unit 3 and other testing devices. The air duct system 5 can form an air flow passing through the battery simulation box 1 and the heat exchanger 2 so as to simulate the state of the automobile during driving.
The battery simulation case 1 of this application includes case shell 11, heater strip 12 and fan 13, and heater strip 12 and fan 13 set up in case shell 11. The material and the overall dimension of the case shell 11 are substantially consistent with those of a battery case used on a new energy automobile, the heating wire 12 is externally connected with a power supply through a voltage regulator 44 to form a heating loop, the temperature in the battery simulation case 11 is heated, and the temperature rise phenomenon of battery chemical reaction production is simulated. An electric energy meter 43 is also arranged on the heating loop, and the electric energy meter 43 is connected with the analysis control system 4. The blower 13 slightly disturbs the airflow of the battery simulation box 11 to make the temperature inside the battery simulation box 11 uniform.
The heat exchanger 2 of this application can also place heat exchanger 2 in battery simulation case 11 through the solid conduction heat transfer mode transmission energy that carries out face-to-face contact with battery simulation case 11, carries out the energy exchange through natural convection or compulsory convection mode and battery simulation case 11. The energy source provided by the heat exchanger 2 to the battery simulation box 11 can be heat energy or cold energy, wherein the heat energy is used for heating the battery simulation box 11, and the cold energy is used for cooling the battery simulation box 11.
When the heat exchanger 2 is placed outside the battery simulation box 1, and one exposed surface of the battery simulation box 1 is in direct contact with the heat exchanger 2 to exchange heat through conduction, other surfaces of the box shell 11 can be made into a heat insulation state. When the temperature in the battery simulation box 1 is in a stable state, the energy obtained by the battery simulation box 1 through the heat exchanger 2 is equal to the energy obtained by the battery simulation box 1 through the electric heating wires 12. If the heat exchanger 2 is placed inside the battery simulation box 1, all the surfaces of the box shell 11 can be made into a heat insulation state when the heat exchanger exchanges heat with the environment inside the battery simulation box 1 through natural convection or forced convection. When the temperature in the battery simulation box 1 is in a stable state, the energy obtained by the battery simulation box 1 through the heat exchanger 2 is equal to the energy obtained by the battery simulation box 1 through the electric heating wire 12.
The circulating unit 3 of this application is used for providing the heat transfer medium of circulation usefulness for heat exchanger 2 to heat exchanger 2 obtains energy supply battery analog box 1 of heat transfer medium. The circulation unit 3 includes a pump 31, a second heat exchanger 32, and a flow control valve 33 connected to a heat exchange medium circulation line. The heat exchange medium provided by the circulating unit 3 to the heat exchanger 2 can be water or refrigerant. A fan 34 may also be provided in the circulator group 3 to exchange heat with the second heat exchanger 32.
The analysis control system 4 collects various parameters of the battery simulation box 1, the heat exchanger 2, the circulating unit 3 and the air duct system 5 in the test operation process. If the temperature in the battery simulation box 1 can be obtained through the sensor probe 41, the temperature distribution of the heat exchanger 2 can be obtained through the sensor 42, the heating power consumption of the heating wire 12 in the battery box can be obtained through the electric energy meter 43, and the like.
The air duct system 5 is used for simulating air flow generated by a new energy automobile in the driving process, so that the testing device can obtain testing parameters when the air flow passes through the battery simulation box 1 and the heat exchanger 2. The air duct system includes a fan 51, an energy supply system 52 and an air duct wall 53. The fan 51 provides air flow with flow rate and flow speed required by the test, the energy supply system 52 provides energy to enable the battery simulation box 1 and the heat exchanger 2 to be in a high-temperature or low-temperature environment, and the air channel wall 53 forms a channel for the air flow to flow through the surfaces of the battery simulation box 1 and the heat exchanger 2.
The method for testing the heat exchange quantity of the battery box heat exchanger by using the heat exchange quantity testing device comprises the following steps:
(1) installing the heat exchanger 2, and connecting the interface of the heat exchanger 2 with the interface of the circulating unit 3 in a sealing way;
(2) the battery simulation box and the heat exchanger 2 are well installed and fixed;
(3) and starting the air duct system 5, adjusting the operating parameters of the fan 51 and the energy supply system 52, and adjusting the air flow parameters, such as temperature, wind speed, flow and the like, required in the air duct to the values required by the test.
(4) The electric heating wire 12 in the battery simulation box 1 is started, the temperature and the energy load in the battery simulation box 1 are gradually increased to the values required by the test by adjusting the external voltage regulator 44 according to the value obtained by the electric energy meter 43 and the energy load generated by the battery box.
(5) And starting the circulating unit 3 to provide a circulating heat exchange medium for the heat exchanger 2.
(6) After the whole testing device is operated for a period of time, when the fluctuation value of each performance parameter obtained by the analysis control system 4 in the specified time meets the requirement, the operation of the device is stopped, and the test is finished.
(7) And analyzing and calculating the data obtained by the analysis control system 4 to obtain the performance parameters of the heat exchanger.
By the heat exchange amount testing device and the heat exchange amount testing method, the heat exchange matching relation between the heat exchanger and the battery box can be simulated really, and data support is provided for heat exchange of the new energy automobile during charging or driving in various environmental scenes; the energy consumption consumed for maintaining a constant required temperature value in the battery box is obtained by simulating the energy consumption condition of the circulating unit; the energy efficiency ratio of a system formed by the heat exchanger and the circulating unit can be obtained by dividing the electric power consumption of the electric heating wire measured by the heat insulation state of the battery simulation box by the energy consumption of the circulating unit.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims (7)

1. The utility model provides a heat transfer volume testing arrangement of battery box heat exchanger, its characterized in that, includes battery simulation case, heat exchanger, circulation unit, analysis control system and air duct system, the heat exchanger is placed the outside of battery simulation case and with the exposed surface direct contact of battery simulation case perhaps the heat exchanger is placed the inside of battery simulation case, the circulation unit with the heat exchanger is connected and is formed with the circulation pipeline of heat transfer medium, analysis control system connects respectively the battery simulation case the heat exchanger with the circulation unit, air duct system includes the wind channel wall, the battery simulation case with the heat exchanger sets up in the wind channel wall.
2. The heat exchange amount testing device according to claim 1, wherein the battery simulation box comprises a box housing, a heating wire and a fan, and the heating wire and the fan are arranged in the box housing.
3. The heat exchange amount testing device according to claim 2, wherein the heating wire forms a heating loop through an external power supply of a voltage regulator, an electric energy meter is arranged on the heating loop, and the electric energy meter is connected with the analysis control system.
4. The heat exchange amount testing device according to any one of claims 1 to 3, wherein the circulation unit includes a pump, a second heat exchanger, and a flow control valve connected to a heat exchange medium circulation line.
5. The heat exchange amount testing device according to claim 4, wherein a fan is further arranged in the circulating unit to exchange heat with the second heat exchanger of the circulating unit.
6. The heat exchange amount testing device according to any one of claims 1 to 5, wherein the air duct system further comprises a fan and an energy supply system.
7. A heat exchange amount testing method of a battery box heat exchanger, characterized in that the heat exchange amount testing device of any one of claims 1-6 is used for testing, and the method comprises the following steps:
(1) installing a heat exchanger, and connecting an interface of the heat exchanger with an interface of a circulating unit in a sealing manner;
(2) mounting and fixing the battery simulation box and the heat exchanger;
(3) starting an air duct system, adjusting operating parameters of a fan and an energy supply system, and adjusting air flow parameters required in an air duct to values required by testing;
(4) starting an electric heating wire in the battery simulation box, and gradually increasing the temperature and the energy load in the battery simulation box to the values required by the test by adjusting an external voltage regulator;
(5) starting a circulating unit to provide a circulating heat exchange medium for the heat exchanger;
(6) after the whole testing device is operated for a period of time, when the fluctuation value of each performance parameter obtained by the analysis control system in the specified time meets the requirement, the operation of the device is stopped, and the test is finished;
(7) and analyzing and calculating the data obtained by the analysis control system to obtain the performance parameters of the heat exchanger.
CN202111093900.1A 2021-09-17 2021-09-17 Heat exchange amount testing device and method for battery box heat exchanger Pending CN114001986A (en)

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CN202111093900.1A CN114001986A (en) 2021-09-17 2021-09-17 Heat exchange amount testing device and method for battery box heat exchanger

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Application Number Priority Date Filing Date Title
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