CN115061054A - Power battery high-power pulse discharge test equipment and method - Google Patents
Power battery high-power pulse discharge test equipment and method Download PDFInfo
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- CN115061054A CN115061054A CN202210634144.7A CN202210634144A CN115061054A CN 115061054 A CN115061054 A CN 115061054A CN 202210634144 A CN202210634144 A CN 202210634144A CN 115061054 A CN115061054 A CN 115061054A
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- 238000012360 testing method Methods 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010998 test method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a power battery high-power pulse discharge test device and a method thereof, wherein the device comprises a control unit and a resistance load unit; the control unit comprises a power supply module, an MCU and N test channels; the power supply module is used for supplying power to the control unit; each test channel is provided with a switch unit; the input end of each switch unit is used for connecting a power battery to be tested, and the output end of each switch unit is connected with a resistance load unit; the control end of each switch unit is connected with the signal output end of the MCU; the signal input end of the MCU is connected with a mode switching button and N channel control buttons; the mode switching button is used for controlling the corresponding testing channel switch through the MCU and the switch unit; and the MCU is internally provided with an automatic test program which is used for controlling the switch of each test channel through the switch unit. The power battery high-power pulse discharge testing equipment is programmable pulse discharge equipment, has enough power and small volume, and is convenient to use.
Description
Technical Field
The invention relates to the technical field of power battery charging and discharging tests, in particular to a power battery high-power pulse discharging test device and method.
Background
After the power battery is grouped, a charge and discharge test is required. The common discharge device for charge and discharge tests is an electronic load, and the existing direct current electronic load adopts a constant voltage, constant power, constant current or constant resistance mode to discharge. For a battery in a common application scene, the direct current electronic load discharging device has no problem, but for a battery used in a specific occasion, the direct current electronic load discharging device cannot meet the requirement.
Therefore, the defects of the current power battery in charge and discharge tests are as follows:
firstly, no programmable pulse type discharge equipment exists;
the other is a large-power discharge device, but the device is bulky and inconvenient to use.
Disclosure of Invention
The invention aims to provide a power battery high-power pulse discharge test device and a power battery high-power pulse discharge test method, which are used for solving the problems in the conventional power battery charge and discharge test.
The invention provides a power battery high-power pulse discharge test device, which comprises a control unit and a resistance load unit, wherein the control unit is used for controlling the resistance load unit;
the control unit comprises a power supply module, an MCU and N test channels; n is a positive integer;
the power supply module is used for supplying power to the control unit;
a switch unit is arranged in each test channel; the input end of each switch unit is used for connecting a power battery to be tested, and the output end of each switch unit is connected with a resistance load unit; the control end of each switch unit is connected with the signal output end of the MCU;
the signal input end of the MCU is connected with a mode switching button and N channel control buttons; the mode switching button is used for inputting a mode switching signal of the MCU working in a manual test mode or an automatic test mode to the MCU; the N channel control buttons correspond to the switch units of the N test channels and are used for inputting control signals to the MCU to control the MCU to output switch signals for switching on or off the switch units of the corresponding test channels when the MCU works in a manual test mode; and the MCU is internally provided with an automatic test program, and the automatic test program is used for outputting a switch signal for controlling the switch unit of each test channel to be switched on or switched off when the MCU works in an automatic test mode.
In some embodiments, the switching unit is an insulated gate bipolar power transistor IGBT; the collector of the insulated gate bipolar power tube IGBT is connected with a power battery to be tested, and the transmitter of the insulated gate bipolar power tube IGBT is connected with the resistance load unit; and the base electrode of the insulated gate bipolar power tube IGBT is connected with the signal output end of the MCU.
In some embodiments, the power battery high-power pulse discharge testing equipment further comprises a safety device; and the input ends of the switch units of all the test channels are connected with the power battery to be tested through the safety device.
In some embodiments, the fuse is an over-current fuse.
In some embodiments, a secondary protection device is further disposed in each test channel.
In some embodiments, the secondary protection device is a circuit breaker.
In some embodiments, the power module is an AC-DC power module.
The invention also provides a power battery high-power pulse discharge test method, which is realized by adopting the power battery high-power pulse discharge test equipment and comprises the following steps:
s1, inputting a mode switching signal of the MCU working in a manual test mode or an automatic test mode to the MCU through the mode switching button;
s2, the MCU works in a manual test mode or an automatic test mode according to the mode switching signal:
when the MCU works in a manual test mode, a switch signal for controlling the switch unit of the corresponding test channel to be switched on or off is input to the MCU through the N channel control buttons, the on-off of the N test channels is manually controlled, and therefore the manual test of the tested power battery is completed;
when the MCU works in the automatic test mode, the MCU outputs a switch signal for controlling the switch unit of each test channel to be switched on or switched off according to the automatic test program, so that the on-off of the N test channels is automatically controlled, and the automatic test of the tested power battery is finished.
Further, when the MCU operates in the automatic test mode, the control flow of the automatic test program includes M test cycles, each test cycle is as follows:
automatically outputting a switch signal for controlling the switch unit of the first test channel to be opened, and opening the first test channel for a period of time T1; then automatically outputting a switch signal for controlling the switch unit of the first test channel to be closed, and closing the first test channel for a period of time T2;
automatically outputting a switch signal for controlling the switch unit of the second test channel to be opened, and opening the second test channel for a period of time T1; then automatically outputting a switch signal for controlling the switch unit of the second test channel to be closed, and closing the second test channel for a period of time T2;
and so on in turn;
automatically outputting a switch signal for controlling the opening of a switch unit of the Nth test channel, and opening the Nth test channel for a period of time T1; and then automatically outputting a switch signal for controlling the switch unit of the Nth test channel to close, and closing the Nth test channel for a period of time T2.
In some embodiments, N-5.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the power battery high-power pulse discharge testing equipment is programmable pulse discharge equipment, has enough power and small volume, and is convenient to use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a power battery high-power pulse discharge test device in embodiment 1 of the present invention.
Fig. 2 is a schematic flow chart of a power battery high-power pulse discharge testing method in embodiment 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the embodiment provides a power battery high-power pulse discharge testing device, which includes a control unit and a resistive load unit;
the control unit comprises a power supply module, an MCU and N test channels; n is a positive integer, where N is set to 5 in this embodiment, that is, the embodiment includes 5 test channels;
the power supply module is used for supplying power to the control unit;
a switch unit is arranged in each test channel; the input end of each switch unit is used for connecting a power battery to be tested, and the output end of each switch unit is connected with a resistance load unit; the control end of each switch unit is connected with the signal output end of the MCU; in this embodiment, the switch unit is an insulated gate bipolar power transistor IGBT (M1, M2, M3, M4, M5); the collector of the insulated gate bipolar power tube IGBT is connected with a power battery to be tested, and the transmitter of the insulated gate bipolar power tube IGBT is connected with the resistance load unit; the base electrode of the insulated gate bipolar power tube IGBT is connected with the signal output end of the MCU;
the signal input end of the MCU is connected with a mode switching button and N channel control buttons; the mode switching button is used for inputting a mode switching signal of the MCU working in a manual test mode or an automatic test mode to the MCU; the N channel control buttons correspond to the switch units of the N test channels and are used for inputting switch signals for controlling the switch units of the corresponding test channels to be switched on or switched off to the MCU when the MCU works in a manual test mode; and the MCU is internally provided with an automatic test program, and the automatic test program is used for outputting a switch signal for controlling the switch unit of each test channel to be switched on or switched off when the MCU works in an automatic test mode.
The working principle is as follows:
the power supply module adopts an AC-DC power supply module and is used for converting an input AC220V power supply into DC24V required by the low-voltage work of the control unit; in order to ensure safety, two insurance modes can be set:
(1) the power battery high-power pulse discharge test equipment also comprises a safety device; and the input ends of the switch units of all the test channels are connected with the power battery to be tested through the safety device. Furthermore, the fuse device adopts an overcurrent fuse which is fused when the overcurrent happens abnormally, so that the fault expansion is avoided;
(2) and a secondary protection device is also arranged in each test channel. Further, the secondary protection device is a circuit breaker (Q1, Q2, Q3, Q4, Q5), so that secondary protection is formed on the test channel.
Self-checking after the equipment is powered on;
after the self-checking of the equipment is finished, a mode switching signal of the MCU working in a manual test mode or an automatic test mode is input to the MCU through a mode switching button, and the MCU works in the manual test mode or the automatic test mode according to the mode switching signal;
when the MCU works in a manual test mode, a switch signal for controlling the switch unit of the corresponding test channel to be switched on or off is input to the MCU through the N channel control buttons, the on-off of the N test channels is manually controlled, and therefore the manual test of the tested power battery is completed; specifically, the method comprises the following steps: if the first channel control button is pressed, a control signal is input to the MCU to control the MCU to output a switch signal for opening a switch unit of the first test channel, so that the first test channel is controlled to be opened, and the power battery discharges; if the second channel control button is pressed, a control signal is input to the MCU to control the MCU to output a switch signal for opening a switch unit of the second test channel, so that the second test channel is controlled to be opened, and the power battery discharges; analogizing in sequence, if the Nth channel control button is pressed down, inputting a control signal to the MCU to control the MCU to output a switch signal for opening the switch unit of the Nth test channel, so as to control the Nth test channel to be opened and discharge the power battery; correspondingly, if the channel control button is not pressed, the control signal is input to the MCU to control the MCU to output a switch signal for closing the switch unit corresponding to the test channel, so that the corresponding test channel is controlled to be closed, and the power battery is not discharged.
When the MCU works in the automatic test mode, namely the MCU is controlled to enter the pulse discharge mode of the power battery, the MCU outputs a switch signal for controlling the switch unit of each test channel to be switched on or off according to the automatic test program, and the on-off of the N test channels is automatically controlled, so that the automatic test of the tested power battery is completed. Specifically, the method comprises the following steps: the control flow of the automatic test program includes M (e.g., 600) test cycles, each test cycle is as follows: automatically outputting a switch signal for controlling the opening of the switch unit of the first test channel, and opening the first test channel for a period of time T1 (such as 45 ms); then, automatically outputting a switch signal for controlling the switch unit of the first test channel to close, and closing the first test channel for a period of time T2 (such as 5 ms); t1 and T2 can be set as desired to enable the test channel switching time to be less than 10 mus. Automatically outputting a switch signal for controlling the switch unit of the second test channel to be opened, and opening the second test channel for a period of time T1; then automatically outputting a switch signal for controlling the switch unit of the second test channel to be closed, and closing the second test channel for a period of time T2; and so on; automatically outputting a switch signal for controlling the opening of a switch unit of the Nth test channel, and opening the Nth test channel for a period of time T1; and then automatically outputting a switch signal for controlling the switch unit of the Nth test channel to close, and closing the Nth test channel for a period of time T2. And after M test cycles are completed, all the test channels are closed and are in a standby state, and by the pulse discharge mode of the power battery, the maximum power of the high-power pulse discharge test equipment of the power battery is 250 kw.
Example 2
As shown in fig. 2, based on the power battery high-power pulse discharge test device described in embodiment 1, this embodiment provides a power battery high-power pulse discharge test method, which includes the following steps:
s1, inputting a mode switching signal of the MCU working in a manual test mode or an automatic test mode to the MCU through the mode switching button;
s2, the MCU works in a manual test mode or an automatic test mode according to the mode switching signal:
when the MCU works in a manual test mode, a switch signal for controlling the switch unit of the corresponding test channel to be switched on or off is input to the MCU through the N channel control buttons, the on-off of the N test channels is manually controlled, and therefore the manual test of the tested power battery is completed; specifically, the method comprises the following steps: if the first channel control button is pressed, a control signal is input to the MCU to control the MCU to output a switch signal for opening a switch unit of the first test channel, so that the first test channel is controlled to be opened, and the power battery discharges; if the second channel control button is pressed, a control signal is input to the MCU to control the MCU to output a switch signal for opening a switch unit of the second test channel, so that the second test channel is controlled to be opened, and the power battery discharges; analogizing in sequence, if the Nth channel control button is pressed down, inputting a control signal to the MCU to control the MCU to output a switch signal for opening the switch unit of the Nth test channel, so as to control the Nth test channel to be opened and discharge the power battery; correspondingly, if the channel control button is not pressed, the control signal is input to the MCU to control the MCU to output a switch signal for closing the switch unit corresponding to the test channel, so that the corresponding test channel is controlled to be closed, and the power battery is not discharged.
When the MCU works in the automatic test mode, the MCU outputs a switch signal for controlling the switch unit of each test channel to be switched on or switched off according to the automatic test program, so that the on-off of the N test channels is automatically controlled, and the automatic test of the tested power battery is finished. Specifically, the method comprises the following steps: the control flow of the automatic test program includes M (e.g., 600) test cycles, each test cycle is as follows: automatically outputting a switch signal for controlling the opening of the switch unit of the first test channel, and opening the first test channel for a period of time T1 (such as 45 ms); then automatically outputting a switch signal for controlling the switch unit of the first test channel to close, and closing the first test channel for a period of time T2 (such as 5 ms); t1 and T2 can be set as needed. Automatically outputting a switch signal for controlling the switch unit of the second test channel to be opened, and opening the second test channel for a period of time T1; then automatically outputting a switch signal for controlling the switch unit of the second test channel to be closed, and closing the second test channel for a period of time T2; and so on; automatically outputting a switch signal for controlling the opening of a switch unit of the Nth test channel, and opening the Nth test channel for a period of time T1; and then automatically outputting a switch signal for controlling the switch unit of the Nth test channel to close, and closing the Nth test channel for a period of time T2.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The high-power pulse discharge test equipment for the power battery is characterized by comprising a control unit and a resistance load unit;
the control unit comprises a power supply module, an MCU and N test channels; n is a positive integer;
the power supply module is used for supplying power to the control unit;
a switch unit is arranged in each test channel; the input end of each switch unit is used for connecting a power battery to be tested, and the output end of each switch unit is connected with a resistance load unit; the control end of each switch unit is connected with the signal output end of the MCU;
the signal input end of the MCU is connected with a mode switching button and N channel control buttons; the mode switching button is used for inputting a mode switching signal of the MCU working in a manual test mode or an automatic test mode to the MCU; the N channel control buttons correspond to the switch units of the N test channels and are used for inputting control signals to the MCU to control the MCU to output switch signals for switching on or off the switch units of the corresponding test channels when the MCU works in a manual test mode; and the MCU is internally provided with an automatic test program, and the automatic test program is used for outputting a switch signal for controlling the switch unit of each test channel to be switched on or switched off when the MCU works in an automatic test mode.
2. The power battery high-power pulse discharge test equipment according to claim 1, wherein the switch unit is an insulated gate bipolar power transistor (IGBT); the collector of the insulated gate bipolar power tube IGBT is connected with a power battery to be tested, and the transmitter of the insulated gate bipolar power tube IGBT is connected with the resistance load unit; and the base electrode of the insulated gate bipolar power tube IGBT is connected with the signal output end of the MCU.
3. The power battery high-power pulse discharge testing device according to claim 1, wherein the power battery high-power pulse discharge testing device further comprises a safety device; and the input ends of the switch units of all the test channels are connected with the power battery to be tested through the safety device.
4. The power battery high-power pulse discharge testing equipment according to claim 3, wherein the fuse device is an overcurrent fuse.
5. The power battery high-power pulse discharge testing equipment according to claim 1, wherein a secondary protection device is further arranged in each testing channel.
6. The power battery high-power pulse discharge testing equipment according to claim 1, wherein the secondary protection device is a circuit breaker.
7. The power battery high-power pulse discharge test device according to claim 1, wherein the power module is an AC-DC power module.
8. A power battery high-power pulse discharge test method is characterized in that the method is realized by adopting the power battery high-power pulse discharge test equipment as claimed in any one of claims 1 to 7; the method comprises the following steps:
s1, inputting a mode switching signal of the MCU working in a manual test mode or an automatic test mode to the MCU through the mode switching button;
s2, the MCU works in a manual test mode or an automatic test mode according to the mode switching signal:
when the MCU works in a manual test mode, a switch signal for controlling the switch unit of the corresponding test channel to be switched on or off is input to the MCU through the N channel control buttons, so that the on-off of the N test channels is manually controlled, and the manual test of the tested power battery is finished;
when the MCU works in the automatic test mode, the MCU outputs a switch signal for controlling the switch unit of each test channel to be switched on or switched off according to the automatic test program, so that the on-off of the N test channels is automatically controlled, and the automatic test of the tested power battery is finished.
9. The power battery high-power pulse discharge test method according to claim 8, wherein when the MCU operates in the automatic test mode, the control flow of the automatic test program includes M test cycles, each test cycle is as follows:
automatically outputting a switch signal for controlling the switch unit of the first test channel to be opened, and opening the first test channel for a period of time T1; then automatically outputting a switch signal for controlling the switch unit of the first test channel to be closed, and closing the first test channel for a period of time T2;
automatically outputting a switch signal for controlling the switch unit of the second test channel to be opened, and opening the second test channel for a period of time T1; then automatically outputting a switch signal for controlling the switch unit of the second test channel to be closed, and closing the second test channel for a period of time T2;
and so on;
automatically outputting a switch signal for controlling the opening of a switch unit of the Nth test channel, and opening the Nth test channel for a period of time T1; and then automatically outputting a switch signal for controlling the switch unit of the Nth test channel to close, and closing the Nth test channel for a period of time T2.
10. The power battery high-power pulse discharge test method according to claim 1, wherein N-5.
Priority Applications (1)
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| CN202210634144.7A CN115061054A (en) | 2022-06-07 | 2022-06-07 | Power battery high-power pulse discharge test equipment and method |
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| CN202210634144.7A CN115061054A (en) | 2022-06-07 | 2022-06-07 | Power battery high-power pulse discharge test equipment and method |
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