CN113009369A - Method and device for testing cycle durability of power battery - Google Patents
Method and device for testing cycle durability of power battery Download PDFInfo
- Publication number
- CN113009369A CN113009369A CN202110291775.9A CN202110291775A CN113009369A CN 113009369 A CN113009369 A CN 113009369A CN 202110291775 A CN202110291775 A CN 202110291775A CN 113009369 A CN113009369 A CN 113009369A
- Authority
- CN
- China
- Prior art keywords
- cooling
- temperature
- test
- test stage
- preset temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 188
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 112
- 239000000110 cooling liquid Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 12
- 238000010998 test method Methods 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 5
- 230000001351 cycling effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to 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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
Abstract
The application discloses a method and a device for testing cycle durability of a power battery, wherein the method comprises the following steps: collecting the actual temperature of the power battery; when the actual temperature is higher than a first preset temperature, starting cooling equipment and entering a first test stage, wherein the cooling flow of the first test stage is a first target flow, and the cooling temperature of the inlet water of the cooling liquid is a first cooling temperature; and after entering the first test stage, if the actual temperature is lower than the second preset temperature, controlling the cooling equipment to exit the first test stage and closing the cooling equipment, otherwise, maintaining the first test stage or entering the Nth test stage according to the actual temperature and executing a corresponding cooling action. Therefore, the problems that the temperature difference before and after the cyclic durability test in the related technology is large, the false attenuation of the battery is easily caused, the test accuracy is poor, the continuous test cannot be realized, the test efficiency is low, the test experience is poor and the like are solved.
Description
Technical Field
The application relates to the technical field of power batteries, in particular to a method and a device for testing cycle durability of a power battery.
Background
The electric automobile mainly comprises a private car, a network taxi and a taxi, and different purposes have different requirements on the cycle durability of the power battery, so that car enterprises often need to perform cycle durability test on the power battery.
In the related art, a cycle endurance test is usually performed by building a rack, and the battery capacity is exerted and temperature is related, so that the temperature difference before and after the test is large, and the temperature consistency of initial charging and discharging is often ensured by standing for a long time or other cooling modes.
However, the temperature difference before and after the cycle endurance test in the related art is large, so that the false attenuation of the battery is easily caused, the test accuracy is reduced, the consistency of the charging and discharging temperature can be ensured only in a long time during each test, continuous tests cannot be performed, the test efficiency is greatly reduced, the workload of testers is increased, the test experience is poor, and urgent solution needs to be provided.
Content of application
The application provides a method and a device for testing cycle durability of a power battery, and aims to solve the problems that the temperature difference before and after the cycle durability test in the related technology is large, the false attenuation of the battery is easily caused, the test accuracy is poor, the continuous test cannot be realized, the test efficiency is low, the test experience is poor, and the like.
The embodiment of the first aspect of the application provides a method for testing cycle endurance of a power battery, which comprises the following steps: collecting the actual temperature of the power battery; when the actual temperature is higher than a first preset temperature, starting cooling equipment and entering a first test stage, wherein the cooling flow of the first test stage is a first target flow, and the cooling temperature of the inlet water of the cooling liquid is a first cooling temperature; after entering the first test stage, if the actual temperature is lower than a second preset temperature, controlling the cooling equipment to exit the first test stage and close the cooling equipment, otherwise, maintaining the first test stage or entering an Nth test stage according to the actual temperature and executing a corresponding cooling action.
Further, if not, maintaining the first test stage or entering an nth test stage according to the actual temperature, and executing a corresponding cooling action, including: if the actual temperature is higher than a third preset temperature, controlling the cooling equipment to enter a second test stage, increasing the cooling flow of the first test stage to a second target flow, and reducing the cooling temperature of the inlet water of the cooling liquid to a second cooling temperature, wherein the second preset temperature is lower than the first preset temperature, and the third preset temperature is higher than the first preset temperature; after entering the second test stage, if the actual temperature is lower than a fourth preset temperature, controlling the cooling equipment to exit the second test stage and enter the first test stage again, wherein the fourth preset temperature is lower than the third preset temperature.
Further, the method of the embodiment of the present application further includes: and determining the charging rate of the cooling equipment based on the step-charge/1C rate so as to set the charging and discharging modes of the power battery.
Optionally, the first to fourth preset temperatures are 30 ℃, 27 ℃, 40 ℃ and 35 ℃ respectively.
Alternatively, the first target flow rate may be 10L/min, and the second target flow rate may be 15L/min.
The embodiment of the second aspect of the present application provides a cycling endurance testing device for a power battery, including: the acquisition module is used for acquiring the actual temperature of the power battery; the starting module is used for starting the cooling equipment and entering a first test stage when the actual temperature is higher than a first preset temperature, wherein the cooling flow of the first test stage is a first target flow, and the cooling temperature of the inlet water of the cooling liquid is a first cooling temperature; and the control module is used for controlling the cooling equipment to exit the first test stage and close the cooling equipment if the actual temperature is lower than a second preset temperature after entering the first test stage, and otherwise, maintaining the first test stage or entering an Nth test stage according to the actual temperature and executing a corresponding cooling action.
Further, the control module is further configured to control the cooling device to enter a second test stage if the actual temperature is greater than a third preset temperature, increase the cooling flow rate of the first test stage to a second target flow rate, and reduce the cooling temperature of the cooling liquid to a second cooling temperature, where the second preset temperature is less than the first preset temperature, and the third preset temperature is greater than the first preset temperature; after entering the second test stage, if the actual temperature is lower than a fourth preset temperature, controlling the cooling equipment to exit the second test stage and enter the first test stage again, wherein the fourth preset temperature is lower than the third preset temperature.
Further, the device of this application embodiment still includes: and the setting module is used for determining the charging multiplying power of the cooling equipment based on the step-charge/1C multiplying power so as to set the charging and discharging modes of the power battery.
Optionally, the first to fourth preset temperatures are 30 ℃, 27 ℃, 40 ℃ and 35 ℃ respectively.
Alternatively, the first target flow rate may be 10L/min, and the second target flow rate may be 15L/min.
The temperature through maintaining power battery is in the temperature range of invariable relatively, avoids the too big spurious decay that causes the battery of the difference in temperature around the test, effectively improves the accuracy of test, need not long-time wait after the test and can guarantee the uniformity of charge-discharge temperature when testing at every turn, can realize power battery's incessant circulation endurance test, effectively shortens the time of test, improves the efficiency of test, reduces tester's work load simultaneously, promotes tester's test experience. Therefore, the problems that the temperature difference before and after the cyclic durability test in the related technology is large, the false attenuation of the battery is easily caused, the test accuracy is poor, the continuous test cannot be realized, the test efficiency is low, the test experience is poor and the like are solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a cyclic endurance testing system of a power battery according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a flow chart of a method for testing cycle endurance of a power battery according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating a schematic flow chart of a method for testing cycle endurance of a power battery according to an embodiment of the present application;
fig. 4 is a test result illustration of a cycle endurance test method for a power battery according to an embodiment of the present application;
fig. 5 is a block diagram of a device for testing cycle endurance of a power battery according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
Before introducing the method and the device for testing the cycle endurance of the power battery, a description is given of a cycle endurance testing system of the power battery according to an embodiment of the present application, where the method according to the embodiment of the present application is applied to the cycle endurance testing system of the power battery according to the embodiment of the present application.
As shown in fig. 1, the cyclic durability test system includes a power battery 1, a charge and discharge test cabinet 2, and a cooling device 3, in this embodiment, the power battery 1 may be a liquid-cooled battery pack, and the cooling device 3 may be a liquid-cooled device, in other embodiments, the power battery 1 may also be another type of battery pack, and the cooling device 3 may also be another type of device, which is not limited in this respect. The high voltage of the power battery 1 and the high voltage of the charge and discharge test cabinet 2 are connected through a power cable, and the CAN signal is connected through a low voltage wire harness; the cooling device 3 is connected with the liquid cooling pipeline of the power battery 1 through a hose, the periphery of the hose is wrapped with a heat insulation layer to reduce the cooling effect, and quick connecting plugs matched with the sides of the liquid cooling pipelines of the cooling device 3 and the power battery 1 are arranged on the two sides of the hose, wherein the connecting plugs can reach the IPX8 waterproof standard, so that the connection reliability and high efficiency can be realized through the butt-insertion of the connectors; the cooling device 3 is connected with the compressed air pipeline through a three-way electronic valve, and under the normal condition, the three-way electronic valve channels (i) and (iii) of the water inlet pipe are opened, the channels (ii) are closed, and the circulating flow of the cooling liquid is realized through a circulating pump. When the test is finished and the cooling liquid of the liquid cooling pipeline in the power battery 1 needs to be emptied, the channels (i) and (ii) are opened, the channel (iii) is closed, the cooling liquid in the power battery 1 and the pipeline flows into the cooling liquid storage tank under the blowing of compressed air, and the residual compressed air is discharged into the air.
The following describes a method and an apparatus for testing cycle endurance of a power battery according to an embodiment of the present application with reference to the drawings. The method comprises the steps of maintaining the temperature of the power battery within a relatively constant temperature range, avoiding the false attenuation of the battery caused by the overlarge temperature difference before and after the test, effectively improving the test accuracy, ensuring the consistency of the charging and discharging temperature during each test without waiting for a long time after the test, realizing the uninterrupted cyclic endurance test of the power battery, effectively shortening the test time, improving the test efficiency, reducing the workload of testers and improving the test experience of the testers. Therefore, the problems that the temperature difference before and after the cyclic durability test in the related technology is large, the false attenuation of the battery is easily caused, the test accuracy is poor, the continuous test cannot be realized, the test efficiency is low, the test experience is poor and the like are solved.
Specifically, fig. 2 is a schematic flowchart of a method for testing cycle endurance of a power battery according to an embodiment of the present disclosure.
As shown in fig. 2, the method for testing the cycle endurance of the power battery comprises the following steps:
in step S101, the actual temperature of the power battery is collected.
Before testing, the power battery, the charge and discharge test cabinet and the cooling device shown in fig. 1 are firstly connected and debugged, and then the charge and discharge mode is set through the charge and discharge test cabinet in the embodiment of the present application. The charging mode adopted by the embodiment of the application can simulate the actual use of the whole vehicle, and the reference of the test is effectively improved.
As a possible implementation manner, the embodiment of the present application may acquire the actual temperature through the temperature sensor.
In step S102, when the actual temperature is higher than a first preset temperature, the cooling device is started and a first test stage is performed, where a cooling flow rate of the first test stage is a first target flow rate, and a cooling temperature of the inlet water of the cooling liquid is a first cooling temperature.
The first preset temperature, the first target flow rate, and the first cooling temperature may all be calibrated according to experiments, for example, the first preset temperature may be set to 30 ℃, the first target flow rate may be set to 10L/min, and the first cooling temperature may be set to 20 ℃.
In step S103, after entering the first test stage, if the actual temperature is lower than the second preset temperature, the cooling device is controlled to exit the first test stage and to be turned off, otherwise, the first test stage is maintained or the nth test stage is entered according to the actual temperature, and the corresponding cooling action is executed.
The second preset temperature may be calibrated according to experiments, for example, the second preset temperature may be set to 27 ℃.
It can be understood that this application embodiment can maintain power battery's temperature in relative invariable within range, avoid causing the spurious attenuation of battery because of the temperature difference, improve the accuracy of battery cycle performance test, need not long-time wait after the test and can guarantee the uniformity of charge-discharge temperature when testing at every turn, can realize the incessant durable test of circulation of power battery, effectively reduce test time, can clear away power battery liquid cooling intraductal cooling liquid fast after the test is finished simultaneously, realize the reuse of cooling liquid.
In this embodiment, otherwise, the first test phase is maintained or the nth test phase is entered according to the actual temperature, and the corresponding cooling action is performed, including: if the actual temperature is higher than a third preset temperature, controlling the cooling equipment to enter a second test stage, increasing the cooling flow of the first test stage to a second target flow, and reducing the cooling temperature of the inlet water of the cooling liquid to a second cooling temperature, wherein the second preset temperature is lower than the first preset temperature, and the third preset temperature is higher than the first preset temperature; after entering the second test stage, if the actual temperature is lower than a fourth preset temperature, controlling the cooling device to exit the second test stage and enter the first test stage again, wherein the fourth preset temperature is lower than the third preset temperature.
The third preset temperature, the fourth preset temperature and the second target flow rate may all be calibrated according to experiments, for example, the third preset temperature may be set to 40 ℃, the fourth preset temperature may be set to 35 ℃, and the second target flow rate may be set to 15L/min.
It should be noted that the cooling device of the embodiment of the present application can realize the multi-stage cooling function by setting the inflow and the temperature, so that the power battery is maintained at a relatively constant temperature by adopting the multi-stage temperature control, the spurious attenuation of the battery caused by the temperature difference is avoided, and the accuracy of the battery cycle performance test is improved.
In this embodiment, taking the implementation of two-stage cooling as an example, the following describes a method for testing the cycle endurance of a power battery by a specific embodiment, as shown in fig. 3, including the following steps:
step S1: connecting and debugging a power battery, a charge and discharge test cabinet and cooling equipment;
step S2: performing charge and discharge test by adopting a step-charge/1C charge and discharge mode;
step S3: judging the actual temperature T of the power batteryBattery with a battery cellWhether it is higher than the first preset temperature TCalibration 1If not, go on to step S3; if so, go to step S4;
step S4: starting a circulating pump of the cooling equipment, adjusting the flow rate to be a first target flow rate L1, and setting the temperature of inlet water to be a first cooling temperature T1;
step S5: judging the actual temperature T of the power batteryBattery with a battery cellWhether or not it is less than the second preset temperature TCalibration 2If yes, go to step S6; otherwise, executing step S7;
step S6: exiting the first test stage and closing the circulating pump of the cooling device;
step S7: judging the actual temperature T of the power batteryBattery with a battery cellWhether it is higher than the third preset temperature TCalibration 3If yes, go to step S8; if not, go to step S3;
step S8: controlling the cooling equipment to enter a second test stage, increasing the cooling flow of the first test stage to a second target flow L2, and setting the water inlet temperature to be a second cooling temperature T2;
step S9: after entering the second test stage, the actual temperature T of the power battery is judgedBattery with a battery cellWhether or not less than the fourth preset temperature TCalibration 4If yes, go to step S4; if not, step S8 is performed.
With reference to the experimental example shown in fig. 4, the previous 5 times of cyclic endurance test results are performed in the present example, where the current defines charging as positive and discharging as negative, according to the test results, the temperature of the battery pack can be maintained between 35 ℃ and 42 ℃ (except for the first circle) by adopting 2 stages of cooling processes in the embodiment of the present application, so that additional temperature adjustment in the processes such as standing is not required, the high consistency of the initial and final temperatures of discharging and discharging at each time can be ensured, the false attenuation of the battery caused by temperature difference is avoided, and the cyclic uninterrupted development is realized, thereby greatly reducing the test time and improving the test efficiency.
According to the circulation endurance test method of the power battery provided by the embodiment of the application, the temperature of the power battery is maintained within a relatively constant temperature range, the false attenuation of the battery caused by the overlarge temperature difference before and after the test is avoided, the test accuracy is effectively improved, the consistency of the charging and discharging temperature during each test can be guaranteed without waiting for a long time after the test, the uninterrupted circulation endurance test of the power battery can be realized, the test time is effectively shortened, the test efficiency is improved, the workload of testers is reduced simultaneously, and the test experience of the testers is improved.
Next, a cycle endurance testing apparatus of a power battery according to an embodiment of the present application is described with reference to the drawings.
Fig. 5 is a block diagram of a device for testing cycle endurance of a power battery according to an embodiment of the present application.
As shown in fig. 5, the cycling endurance testing apparatus 10 for power battery includes: an acquisition module 100, a start module 200 and a control module 300.
The acquisition module 100 is used for acquiring the actual temperature of the power battery; the starting module 200 is configured to start the cooling device and enter a first test stage when the actual temperature is greater than a first preset temperature, where a cooling flow rate of the first test stage is a first target flow rate, and a cooling temperature of inflow water of the cooling liquid is a first cooling temperature; the control module 300 is configured to, after entering the first test stage, control the cooling device to exit the first test stage and close the cooling device if the actual temperature is lower than the second preset temperature, otherwise, maintain the first test stage or enter the nth test stage according to the actual temperature and execute a corresponding cooling action.
Further, the control module 300 is further configured to control the cooling device to enter a second test stage if the actual temperature is greater than a third preset temperature, increase the cooling flow rate of the first test stage to a second target flow rate, and reduce the cooling temperature of the cooling liquid to a second cooling temperature, where the second preset temperature is less than the first preset temperature, and the third preset temperature is greater than the first preset temperature; after entering the second test stage, if the actual temperature is lower than a fourth preset temperature, controlling the cooling device to exit the second test stage and enter the first test stage again, wherein the fourth preset temperature is lower than the third preset temperature.
Further, the apparatus 10 of the embodiment of the present application further includes: and setting a module. The setting module is used for determining the charging rate of the cooling equipment based on the step-charge/1C rate so as to set the charging and discharging mode of the power battery.
Optionally, the first to fourth preset temperatures are 30 ℃, 27 ℃, 40 ℃ and 35 ℃ respectively.
Alternatively, the first target flow rate may be 10L/min and the second target flow rate may be 15L/min.
It should be noted that the foregoing explanation of the embodiment of the method for testing cycling endurance of a power battery is also applicable to the device for testing cycling endurance of a power battery of this embodiment, and will not be described herein again.
According to the durable testing arrangement of power battery's circulation that this application embodiment provided, the temperature through maintaining power battery is in the temperature range of relatively invariable, avoid the too big spurious attenuation that causes the battery of the difference in temperature around the test, effectively improve the accuracy of test, need not long-time the uniformity of charge-discharge temperature when can guaranteeing test at every turn after the test, can realize the durable test of incessant circulation of power battery, effectively shorten the time of test, improve the efficiency of test, reduce tester's work load simultaneously, promote tester's test experience.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
Claims (10)
1. A cycle endurance test method of a power battery is characterized by comprising the following steps:
collecting the actual temperature of the power battery;
when the actual temperature is higher than a first preset temperature, starting cooling equipment and entering a first test stage, wherein the cooling flow of the first test stage is a first target flow, and the cooling temperature of the inlet water of the cooling liquid is a first cooling temperature; and
after entering the first test stage, if the actual temperature is lower than a second preset temperature, controlling the cooling equipment to exit the first test stage and close the cooling equipment, otherwise, maintaining the first test stage or entering an Nth test stage according to the actual temperature and executing a corresponding cooling action.
2. The method of claim 1, wherein the otherwise maintaining the first test phase or entering an nth test phase as a function of the actual temperature and performing a corresponding cooling action comprises:
if the actual temperature is higher than a third preset temperature, controlling the cooling equipment to enter a second test stage, increasing the cooling flow of the first test stage to a second target flow, and reducing the cooling temperature of the inlet water of the cooling liquid to a second cooling temperature, wherein the second preset temperature is lower than the first preset temperature, and the third preset temperature is higher than the first preset temperature; and
after entering the second test stage, if the actual temperature is lower than a fourth preset temperature, controlling the cooling equipment to exit the second test stage and enter the first test stage again, wherein the fourth preset temperature is lower than the third preset temperature.
3. The method of claim 1, further comprising:
and determining the charging rate of the cooling equipment based on the step-charge/1C rate so as to set the charging and discharging modes of the power battery.
4. The method of claim 1, wherein the first to fourth predetermined temperatures are 30 ℃, 27 ℃, 40 ℃ and 35 ℃, respectively.
5. The method of claim 1, wherein the first target flow rate is 10L/min and the second target flow rate is 15L/min.
6. A cyclic durability test device of a power battery is characterized by comprising:
the acquisition module is used for acquiring the actual temperature of the power battery;
the starting module is used for starting the cooling equipment and entering a first test stage when the actual temperature is higher than a first preset temperature, wherein the cooling flow of the first test stage is a first target flow, and the cooling temperature of the inlet water of the cooling liquid is a first cooling temperature; and
and the control module is used for controlling the cooling equipment to exit the first test stage and close the cooling equipment if the actual temperature is lower than a second preset temperature after entering the first test stage, and otherwise, maintaining the first test stage or entering an Nth test stage according to the actual temperature and executing a corresponding cooling action.
7. The apparatus of claim 6, wherein the control module is further configured to control the cooling device to enter a second test stage if the actual temperature is greater than a third preset temperature, increase the cooling flow rate of the first test stage to a second target flow rate, and decrease the cooling temperature of the inlet water of the cooling fluid to a second cooling temperature, wherein the second preset temperature is less than the first preset temperature, and the third preset temperature is greater than the first preset temperature; after entering the second test stage, if the actual temperature is lower than a fourth preset temperature, controlling the cooling equipment to exit the second test stage and enter the first test stage again, wherein the fourth preset temperature is lower than the third preset temperature.
8. The apparatus of claim 6, further comprising:
and the setting module is used for determining the charging multiplying power of the cooling equipment based on the step-charge/1C multiplying power so as to set the charging and discharging modes of the power battery.
9. The apparatus of claim 6, wherein the first to fourth predetermined temperatures are 30 ℃, 27 ℃, 40 ℃ and 35 ℃, respectively.
10. The apparatus of claim 6, wherein the first target flow rate is 10L/min and the second target flow rate is 15L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110291775.9A CN113009369A (en) | 2021-03-18 | 2021-03-18 | Method and device for testing cycle durability of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110291775.9A CN113009369A (en) | 2021-03-18 | 2021-03-18 | Method and device for testing cycle durability of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113009369A true CN113009369A (en) | 2021-06-22 |
Family
ID=76409757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110291775.9A Pending CN113009369A (en) | 2021-03-18 | 2021-03-18 | Method and device for testing cycle durability of power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113009369A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945782A (en) * | 2021-09-10 | 2022-01-18 | 岚图汽车科技有限公司 | Battery management system calibration method and device, storage medium and electronic equipment |
| CN117199613A (en) * | 2023-09-18 | 2023-12-08 | 浙江启辰新能科技有限公司 | Thermal runaway cooling method of energy storage battery and energy storage battery |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100035772A (en) * | 2008-09-29 | 2010-04-07 | 현대자동차주식회사 | Method for cooling battery of hybrid vehicle |
| CN102736035A (en) * | 2012-07-03 | 2012-10-17 | 奇瑞汽车股份有限公司 | Power battery durability test method and system |
| US20140333313A1 (en) * | 2013-05-13 | 2014-11-13 | Southwest Research Institute | Application independent map-based cycle life testing of battery cells |
| US20160131701A1 (en) * | 2014-11-07 | 2016-05-12 | Ford Global Technologies, Llc | Battery testing system and method |
| CN107394308A (en) * | 2017-07-17 | 2017-11-24 | 广州汽车集团股份有限公司 | The system and method for vehicle battery charging cooling |
| CN107946698A (en) * | 2017-10-27 | 2018-04-20 | 宁波吉利罗佑发动机零部件有限公司 | Battery temperature control method and its system, the automobile of a kind of motor vehicle driven by mixed power |
| CN108284763A (en) * | 2018-01-24 | 2018-07-17 | 奇瑞汽车股份有限公司 | Battery cool-down method, device and computer readable storage medium |
| CN108376810A (en) * | 2018-02-12 | 2018-08-07 | 威马智慧出行科技（上海）有限公司 | Power battery thermal management method and system |
| CN108448201A (en) * | 2018-03-14 | 2018-08-24 | 北汽福田汽车股份有限公司 | Battery thermal management method, apparatus, system and new-energy automobile |
| CN108539329A (en) * | 2018-03-14 | 2018-09-14 | 北汽福田汽车股份有限公司 | Battery thermal management method, apparatus, system and electric vehicle |
| CN109188305A (en) * | 2018-07-26 | 2019-01-11 | 奇瑞新能源汽车技术有限公司 | A kind of power battery cycling durable test device and its test method |
| CN109540544A (en) * | 2018-11-30 | 2019-03-29 | 北京新能源汽车股份有限公司 | A kind of test macro and test method for examining battery thermal management system cooling capacity |
| US20190140457A1 (en) * | 2017-11-08 | 2019-05-09 | Nanjing Chervon Industry Co., Ltd. | Battery charging method, battery charger and charging assembly |
| CN110828912A (en) * | 2018-08-13 | 2020-02-21 | 广州汽车集团股份有限公司 | Power battery cooling performance verification method and system |
| CN210926210U (en) * | 2019-11-29 | 2020-07-03 | 奇瑞汽车股份有限公司 | Thermal management test system for power battery of electric vehicle |
| CN111600084A (en) * | 2020-06-22 | 2020-08-28 | 江苏文轩热管理系统有限公司 | Equivalent test system and test method for calorific value of battery pack |
| US20200343601A1 (en) * | 2019-04-23 | 2020-10-29 | GM Global Technology Operations LLC | Battery thermal management |
| CN112018471A (en) * | 2020-09-09 | 2020-12-01 | 江西江铃集团新能源汽车有限公司 | Method and device for controlling liquid cooling of battery pack |
| CN112455287A (en) * | 2019-09-06 | 2021-03-09 | 比亚迪股份有限公司 | Vehicle and cooling method and device of power battery of vehicle |
| CN112505547A (en) * | 2020-11-10 | 2021-03-16 | 东风汽车集团有限公司 | Quick charge test method, device and system and computer equipment |
-
2021
- 2021-03-18 CN CN202110291775.9A patent/CN113009369A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100035772A (en) * | 2008-09-29 | 2010-04-07 | 현대자동차주식회사 | Method for cooling battery of hybrid vehicle |
| CN102736035A (en) * | 2012-07-03 | 2012-10-17 | 奇瑞汽车股份有限公司 | Power battery durability test method and system |
| US20140333313A1 (en) * | 2013-05-13 | 2014-11-13 | Southwest Research Institute | Application independent map-based cycle life testing of battery cells |
| US20160131701A1 (en) * | 2014-11-07 | 2016-05-12 | Ford Global Technologies, Llc | Battery testing system and method |
| CN107394308A (en) * | 2017-07-17 | 2017-11-24 | 广州汽车集团股份有限公司 | The system and method for vehicle battery charging cooling |
| CN107946698A (en) * | 2017-10-27 | 2018-04-20 | 宁波吉利罗佑发动机零部件有限公司 | Battery temperature control method and its system, the automobile of a kind of motor vehicle driven by mixed power |
| US20190140457A1 (en) * | 2017-11-08 | 2019-05-09 | Nanjing Chervon Industry Co., Ltd. | Battery charging method, battery charger and charging assembly |
| CN108284763A (en) * | 2018-01-24 | 2018-07-17 | 奇瑞汽车股份有限公司 | Battery cool-down method, device and computer readable storage medium |
| CN108376810A (en) * | 2018-02-12 | 2018-08-07 | 威马智慧出行科技（上海）有限公司 | Power battery thermal management method and system |
| CN108448201A (en) * | 2018-03-14 | 2018-08-24 | 北汽福田汽车股份有限公司 | Battery thermal management method, apparatus, system and new-energy automobile |
| CN108539329A (en) * | 2018-03-14 | 2018-09-14 | 北汽福田汽车股份有限公司 | Battery thermal management method, apparatus, system and electric vehicle |
| CN109188305A (en) * | 2018-07-26 | 2019-01-11 | 奇瑞新能源汽车技术有限公司 | A kind of power battery cycling durable test device and its test method |
| CN110828912A (en) * | 2018-08-13 | 2020-02-21 | 广州汽车集团股份有限公司 | Power battery cooling performance verification method and system |
| CN109540544A (en) * | 2018-11-30 | 2019-03-29 | 北京新能源汽车股份有限公司 | A kind of test macro and test method for examining battery thermal management system cooling capacity |
| US20200343601A1 (en) * | 2019-04-23 | 2020-10-29 | GM Global Technology Operations LLC | Battery thermal management |
| CN112455287A (en) * | 2019-09-06 | 2021-03-09 | 比亚迪股份有限公司 | Vehicle and cooling method and device of power battery of vehicle |
| CN210926210U (en) * | 2019-11-29 | 2020-07-03 | 奇瑞汽车股份有限公司 | Thermal management test system for power battery of electric vehicle |
| CN111600084A (en) * | 2020-06-22 | 2020-08-28 | 江苏文轩热管理系统有限公司 | Equivalent test system and test method for calorific value of battery pack |
| CN112018471A (en) * | 2020-09-09 | 2020-12-01 | 江西江铃集团新能源汽车有限公司 | Method and device for controlling liquid cooling of battery pack |
| CN112505547A (en) * | 2020-11-10 | 2021-03-16 | 东风汽车集团有限公司 | Quick charge test method, device and system and computer equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945782A (en) * | 2021-09-10 | 2022-01-18 | 岚图汽车科技有限公司 | Battery management system calibration method and device, storage medium and electronic equipment |
| CN113945782B (en) * | 2021-09-10 | 2023-10-13 | 岚图汽车科技有限公司 | Battery management system calibration method and device, storage medium and electronic equipment |
| CN117199613A (en) * | 2023-09-18 | 2023-12-08 | 浙江启辰新能科技有限公司 | Thermal runaway cooling method of energy storage battery and energy storage battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102736031B (en) | For the method and apparatus determining the charged state of battery | |
| CN113009369A (en) | Method and device for testing cycle durability of power battery | |
| CN109874360A (en) | It is able to carry out high speed monomer balance and energy-efficient battery charge controller and its method | |
| CN111175653A (en) | Method for identifying and prejudging capacity 'water-jumping' fault of ternary battery | |
| EP3594705B1 (en) | Method and device for estimating service capacity and state of health of minimum battery cell and battery system | |
| WO2014191794A1 (en) | Cell monitoring apparatus, battery monitoring apparatus, integrated circuit and method of monitoring a rechargeable cell | |
| CN111175661A (en) | Method and system for determining state of charge of lithium ion battery | |
| US20200217898A1 (en) | Apparatus and method for evaluating battery state of charge | |
| CN104965180A (en) | Power battery life detection method and device | |
| CN111562498A (en) | Method and system for estimating available capacity of power battery | |
| US20230009288A1 (en) | Vehicle battery diagnosis method and system | |
| CN115184814A (en) | Power battery pack service life prediction method and device, readable storage medium and equipment | |
| CN104113101A (en) | Battery system with battery module and method for determining operating parameters | |
| CN111562504A (en) | Battery aging test method and battery | |
| WO2014018048A1 (en) | Battery management system | |
| US20220326308A1 (en) | State-of-charge cut-off control method, apparatus and system, and storage medium | |
| CN111985069A (en) | Method, device and equipment for determining battery endurance mileage and readable storage medium | |
| CN116053654A (en) | Method and device for determining pulse heating parameters, electronic equipment and storage medium | |
| CN110068409A (en) | Lithium battery stress prediction method and apparatus | |
| CN114759227A (en) | Method and device for determining degradation of fuel cell performance | |
| CN113504477B (en) | Battery cell testing method, device and system | |
| EP4092806A1 (en) | Battery, electricity utilization apparatus, and battery charging method and apparatus | |
| CN116930803A (en) | Battery life test method, device, equipment and storage medium | |
| CN117723973A (en) | Method and device for evaluating battery storage capacity loss, electronic equipment and medium | |
| CN115327401A (en) | Power battery cycle test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |