CN115308612A - Module battery deep over-discharge testing system and method - Google Patents
Module battery deep over-discharge testing system and method Download PDFInfo
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- CN115308612A CN115308612A CN202210924871.7A CN202210924871A CN115308612A CN 115308612 A CN115308612 A CN 115308612A CN 202210924871 A CN202210924871 A CN 202210924871A CN 115308612 A CN115308612 A CN 115308612A
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- 238000009784 over-discharge test Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 59
- 238000012360 testing method Methods 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims description 79
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000012806 monitoring device Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000007405 data analysis Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 description 7
- 238000003379 elimination reaction Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 238000009781 safety test method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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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
-
- 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
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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 application relates to a module battery deep overdischarge testing system and a method, relating to the technical field of battery detection and solving the problem that the existing overdischarge testing method can only carry out overdischarge according to the voltage range set by a charging and discharging device, and the testing range is limited, wherein the system comprises: and the two ends of the charge and discharge controlled module are respectively coupled with the lithium battery module and the charge and discharge management module so as to receive the charge control signal and respond to the charge control signal to control the energy feedback bidirectional power supply module to perform charge test on the lithium battery module, or receive the discharge control signal and respond to the discharge control signal to control the energy feedback bidirectional power supply module to perform overdischarge test on the lithium battery module. The application has the following effects: through deep discharging of the battery, the over-discharge operation of the battery in the actual use process is simulated, the use scene of the battery is simulated to the maximum extent, and the performance detection of the battery is realized.
Description
Technical Field
The application relates to the technical field of battery detection, in particular to a module battery depth over-discharge testing system and method.
Background
At present, the lithium battery is widely applied to the field of new energy automobiles, and the battery is one of three main core parts of an electric automobile and is also a power source spring of the electric automobile. It is therefore important for safety testing of the battery, the main safety test being a charge or over-discharge test.
With respect to the over-discharge test, the over-discharge test is currently performed as follows: a) The single storage battery or the module is charged according to a charging method provided by an enterprise or a method specified by a corresponding test standard; b) The cell or module is discharged for 90min at a current of 1I1 (a) (I1 = nominal capacity).
In view of the above-mentioned related art, the inventor believes that the conventional over-discharge test method can only perform over-discharge according to the set voltage range of the charging and discharging device itself, and the test range is limited.
Disclosure of Invention
In order to make the overdischarge operation of in-process at the reality through to battery degree of depth discharge, the service scene of furthest simulation battery realizes the performance detection of battery, and this application provides a module battery degree of depth overdischarge test system and method.
In a first aspect, the present application provides a module battery deep overdischarge testing system, which adopts the following technical scheme:
the lithium battery module is used for testing charging and overdischarging;
the charging and discharging management module is used for outputting a charging control signal or a discharging control signal;
one end of the energy feedback bidirectional power supply module is coupled with the external charging equipment to discharge in the external charging equipment so as to feed back surplus electric quantity to a power grid or receive the charging of the external charging equipment, and the other end of the energy feedback bidirectional power supply module is coupled with the lithium battery module to carry out charging and overdischarging tests on the lithium battery module;
the two ends of the charge and discharge controlled module are respectively coupled with the lithium battery module and the charge and discharge management module so as to receive the charge control signal and respond to the charge control signal to control the energy feedback bidirectional power supply module to perform charge test on the lithium battery module, or receive the discharge control signal and respond to the discharge control signal to control the energy feedback bidirectional power supply module to perform overdischarge test on the lithium battery module;
and the power supply module is used for supplying power to the charge and discharge management module and the charge and discharge controlled module.
By adopting the technical scheme, the over-discharge test can be performed on the lithium battery module according to the requirements by combining the charge-discharge management module, the charge-discharge controlled module and the energy feedback bidirectional power supply module, so that the use scene of the battery is simulated to the maximum extent, and the performance test of the battery is realized.
Optionally, the charging and discharging management module includes:
the main control module is used for outputting a main control signal;
the charging management module is coupled to the main control module to receive the main control signal and output a charging control signal to the charging and discharging controlled module;
and the discharge management module is coupled to the main control module to receive the main control signal and output a discharge control signal to the charge and discharge controlled module.
By adopting the technical scheme, the hardware framework of the charge and discharge management module is specifically disclosed, the charge management module can be effectively and independently controlled through the master control module, so that whether the charge and discharge controlled module is charged or not is controlled, and in addition, the master control module can also effectively and independently control the discharge management module, so that whether the charge and discharge controlled module is discharged or not is controlled.
Optionally, the charge and discharge controlled module includes:
the charging controlled module is coupled with the charging management module to receive the charging control signal and respond to the charging control signal to control the energy feedback bidirectional power supply module to carry out charging test on the lithium battery module;
and the discharge controlled module is coupled to the discharge management module to receive the discharge control signal and respond to the discharge control signal to control the energy feedback bidirectional power supply module to perform overdischarge test on the lithium battery module.
Through adopting above-mentioned technical scheme, specifically disclose the hardware architecture of the controlled module of charge and discharge, set up through the controlled module of charging and made things convenient for the management module of charging to carry out the independent management and control of the test of charging to the lithium cell module through the energy repayment bidirectional power source module, equally, made things convenient for the management module of discharging to carry out the independent management and control of the test of discharging to the lithium cell module through the controlled module of discharging through the energy repayment bidirectional power source module.
Optionally, the system for testing deep overdischarge of a module battery further includes:
the first pre-charging module is controlled by the main control module and coupled to the charging management module to charge the charging management module, and the voltage difference between the front end and the rear end of the charging management module is kept to be smaller than a preset voltage;
the first voltage detection module is used for detecting the voltage difference of the front end and the rear end of the charging management module;
when the master control module outputs a master control signal for controlling the charging management module, the charging management module and the discharging management module are disconnected, and the first voltage detection module is started to detect the voltage difference of the front end and the rear end of the charging management module;
if the voltage difference between the front end and the rear end of the charging management module detected by the first voltage detection module exceeds a first preset voltage difference, the first pre-charging module receives the master control signal and responds to the master control signal to charge the charging management module, and the voltage difference between the front end and the rear end of the charging management module is kept smaller than the preset voltage difference.
By adopting the technical scheme, the peak elimination existence in the process is considered when the lithium battery module is switched to the charging state during the charging test, and the peak elimination time can be effectively determined by the arrangement of the first pre-charging module and the first voltage detection module, so that the influence of peak elimination generated in the battery charging switching process is avoided.
Optionally, a system for testing deep overdischarge of a module battery further includes:
the second pre-charging module is controlled by the main control module and is coupled to the discharge management module to charge the discharge management module, and the voltage difference between the front end and the rear end of the discharge management module is kept to be smaller than a preset voltage;
the second voltage detection module is used for detecting the voltage of the front end and the rear end of the discharge management module;
when the master control module outputs a master control signal for controlling the discharge management module, disconnecting the charge management module and the discharge management module, and starting the second voltage detection module to detect the voltage difference between the front end and the rear end of the discharge management module;
if the undervoltage protection voltage of the preset discharge management module is greater than or equal to a second preset voltage, starting a second voltage detection module to detect the voltage difference of the front end and the rear end of the discharge management module;
if the voltage difference of the front end and the rear end of the discharge management module detected by the second voltage detection module exceeds the first preset voltage difference, the second pre-charge module receives the master control signal and responds to the master control signal to charge the discharge management module, and the voltage difference of the front end and the rear end of the discharge management module is kept smaller than the first preset voltage difference;
if the undervoltage protection voltage of the preset discharge management module is smaller than a second preset voltage, starting the discharge management module, and then starting a second voltage detection module to detect the voltage difference of the front end and the rear end of the discharge management module;
if the voltage difference between the front end and the rear end of the discharge management module detected by the second voltage detection module exceeds the first preset voltage difference, the second pre-charge module receives the master control signal and responds to the master control signal to charge the discharge management module, and the voltage difference between the front end and the rear end of the discharge management module is kept smaller than the first preset voltage difference.
By adopting the technical scheme, the fact that the existence of the peak elimination in the process needs to be considered when the lithium battery module is switched to the discharge state when the lithium battery module is subjected to discharge test is fully considered, and the time of the peak elimination can be effectively determined through the arrangement of the second pre-charging module and the second voltage detection module, so that the influence of the peak elimination generated in the discharge switching process of the battery is avoided.
Optionally, a module battery deep overdischarge test system further includes:
the battery health degree monitoring device is used for monitoring and acquiring the health degree of the lithium battery module;
the notification module is used for sending notification information to the terminal held by the responsible person;
the processing terminal is used for analyzing and processing data;
and if and only if the health degree of the lithium battery module is lower than the preset health degree, the processing terminal starts the notification module to send notification information to the terminal held by the responsible person.
Through adopting above-mentioned technical scheme, effectively realize whether can receive the influence of putting excessively to the lithium cell module in the test procedure of doing charge and discharge, the battery health degree appears and is less than the anticipated condition to can in time inform relevant responsible person when this situation appears.
Optionally, a module battery deep overdischarge test system further includes:
the recording and analyzing module is used for recording the health degree before and after the detection and acquisition of the lithium battery module by the battery health degree monitoring device and analyzing and acquiring a health degree difference value;
and if the health degree difference value exceeding the preset ratio battery exceeds the preset difference value range, the processing terminal starts the notification module to send notification information to the terminal held by the responsible person.
By adopting the technical scheme, the health degree of the tested lithium battery module is influenced and changed before and after the test in the overdischarge process, and once the condition that the change degree of the health degree exceeds the expected degree is generated, the health degree can be timely notified to a responsible person.
Optionally, a module battery deep overdischarge test system is characterized by further comprising:
the first database stores the distribution probability of the fault types corresponding to the battery health degrees lower than the preset health degrees, and defines the fault types to be divided into the faults of the module battery deep overdischarge test system and the battery faults;
if and only if the health degree of the lithium battery module is lower than the preset health degree, the processing terminal analyzes the health degree difference value of the battery exceeding the preset proportion;
if the health degree difference value of the batteries with the preset proportion exceeds a first preset difference value, the processing terminal analyzes and determines that the fault type is that the module battery deep overdischarge test system has faults;
if the health degree difference value of the battery exceeding the preset proportion is lower than a first preset difference value and exceeds a second preset difference value, the processing terminal calls a first database to obtain the fault distribution class distribution probability corresponding to the battery health degree lower than the preset health degree, the fault distribution class distribution probability is used as the current fault class distribution probability determined by analysis, and the first preset difference value is defined to be larger than the second preset difference value;
if the health degree difference value of the battery exceeding the preset ratio is lower than a second preset difference value, the processing terminal analyzes and determines that the fault type is a battery fault;
the processing terminal loads the fault category into the notification information sent to the terminal held by the person in charge.
By adopting the technical scheme, when the health degree difference value exceeding the preset proportion battery exceeds the first preset difference value, the specific fault type can be determined by combining the condition exceeding the health degree difference value of the preset proportion battery and the first database comprehensive analysis, so that a responsible person can know real problems better.
Optionally, a module battery deep overdischarge test system further includes:
the second database stores the specific problem probability distribution of the faults of the module battery deep over-discharge testing system;
the third database stores the processing times and the processing success rate of different specific problems of different responsible persons about different module battery deep overdischarge test system faults;
if the fault type analyzed and determined by the processing terminal has the fault of the module battery deep overdischarge test system, inquiring and acquiring the specific problem probability distribution of the fault of the module battery deep overdischarge test system from the second database, and inquiring and acquiring the processing times and the processing success rate of different specific problems of different responsible persons about the fault of different module battery deep overdischarge test systems from the third database;
and the processing terminal adds the processing success rate of each responsible person about the specific problem and the distribution probability of the corresponding specific problem one by one, obtains the sum as the processing success rate of the responsible person, and selects the responsible person with the highest processing success rate as the object notified by the notification module.
By adopting the technical scheme, when the fault category analyzed and identified by the processing terminal has the fault of the module battery deep overdischarge test system, the processing terminal can conveniently determine the responsible person with the highest processing success rate according to the analysis of the second database and the third database, so that the processing probability of the whole problem is improved.
In a second aspect, the present application provides a method for testing deep overdischarge of a module battery, which adopts the following technical scheme:
a method for testing deep overdischarge of a module battery comprises the following steps:
outputting a charging control signal or a discharging control signal;
receiving a charging control signal and responding to the charging control signal to control the energy feedback bidirectional power supply module to carry out charging test on the lithium battery module;
and receiving the discharge control signal and responding to the discharge control signal to control the energy feedback bidirectional power supply module to perform overdischarge test on the lithium battery module.
By adopting the technical scheme, the over-discharge test can be performed on the lithium battery module through the energy feedback bidirectional power supply module according to the requirements through the charging control signal or the discharging control signal, so that the use scene of the battery is simulated to the maximum extent, and the performance test of the battery is realized.
To sum up, the beneficial technical effect of this application does:
1. the energy feedback bidirectional power supply is used as a negative power supply, so that the purposes of high efficiency, energy saving and deep discharge can be achieved.
2. And a new PID adjustment is adopted, and a pre-charging logic is added, so that the peak elimination generated in the charge and discharge switching process of the battery can be further eliminated.
3. And realizing a large-magnification over-discharge test experiment.
Drawings
Fig. 1 is a system block diagram of a system for testing deep overdischarge of a battery module according to embodiment 1 of the present application.
Fig. 2 is a schematic diagram of the energy feedback bidirectional power module for testing charging and discharging of the lithium battery module in embodiment 1 of the present application.
Fig. 3 is a system block diagram of a system for testing deep overdischarge of a battery module according to embodiment 1 of the present application.
Fig. 4 is a system block diagram of a system for testing deep overdischarge of a battery module according to embodiment 2 of the present application.
Fig. 5 is a system block diagram of a system for testing deep overdischarge of a battery module according to embodiment 3 of the present application.
Fig. 6 is a flowchart illustrating a method for testing deep overdischarge of a battery module according to an embodiment of the disclosure.
In the figure, 1, a lithium battery module; 2. a charge and discharge management module; 3. a charge-discharge controlled module; 4. a power supply module; 5. a main control module; 6. a charging management module; 7. a discharge management module; 8. a charge controlled module; 9. a discharge controlled module; 10. a first pre-charge module; 11. a first voltage detection module; 12. a second pre-charge module; 13. a second voltage detection module; 14. a battery health degree monitoring device; 15. a notification module; 16. a processing terminal; 17. a record analysis module; 18. a first database; 19. a second database; 20. a third database; 21. a fourth database; 22. energy feedback bidirectional power supply module.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the system for testing deep overdischarge of a module battery disclosed in the present application includes a lithium battery module 1, an energy feedback bidirectional power module 22, a charge/discharge management module 2, a charge/discharge controlled module 3, and a power supply module 4, where the power supply module 4 is configured to supply power to the charge/discharge management module 2 and the charge/discharge controlled module 3; the lithium battery module 1 is used for testing charging and overdischarging, and the lithium battery module 1 defines that the battery module can be understood as an intermediate product of a battery cell and a pack formed after a single battery monitoring and managing device is additionally arranged on a lithium ion battery cell combined in a series-parallel connection mode.
The charge and discharge management module 2 is configured to output a charge control signal or a discharge control signal, and two ends of the charge and discharge controlled module 3 are respectively coupled to the lithium battery module 1 and the charge and discharge management module 2 to receive the charge control signal or the discharge control signal, wherein the charge and discharge management module 2 may be a relay.
Referring to fig. 1 and 2, one end of the energy feedback bi-directional power module 22 is coupled to an external charging device to discharge to the external charging device so as to feed back surplus power to a power grid or receive charging of the external charging device, and the other end is coupled to the lithium battery module 1 to perform charging and overdischarging tests on the lithium battery module 1.
When the charge and discharge controlled module 3 receives the charge control signal, the energy feedback bidirectional power supply module 22 is controlled to perform charge test on the lithium battery module 1 in response to the charge control signal; when the charge and discharge controlled module 3 receives the discharge control signal, the energy feedback bi-directional power supply module 22 is controlled to perform an over-discharge test on the lithium battery module 1 in response to the discharge control signal, wherein the charge and discharge controlled module 3 may preferably be a contactor, and the contactors are divided into an alternating current contactor (voltage AC) and a direct current contactor (voltage DC) and are applied to electric power, power distribution and power utilization occasions. The contactor is an electric appliance which utilizes a coil to flow current to generate a magnetic field in industrial electricity to close a contact so as to control a load.
Referring to fig. 3, in view of the fact that the charge and discharge controlled module 3 can better respond to the charge control signal or the discharge control signal when the charge and discharge management module 2 outputs the charge control signal or the discharge control signal, the charge and discharge management module 2 includes a main control module 5, a charge management module 6, and a discharge management module 7; the charge and discharge controlled module 3 comprises a charge controlled module 8 and a discharge controlled module 9, wherein the main control module 5 can be preferably an upper computer.
When the main control module 5 outputs a main control signal for controlling the charging management module 6, the charging management module 6 is coupled to the main control module 5 to receive the main control signal and output a charging control signal to the charging controlled module 8, and the charging controlled module 8 is coupled to the charging management module 6 to receive the charging control signal and respond to the charging control signal to perform a charging test on the lithium battery module 1 through the energy feedback bidirectional power module 22.
When the main control module 5 outputs a main control signal for controlling the discharge management module 7, the discharge management module 7 is coupled to the main control module 5 to receive the main control signal and output a discharge control signal to the discharge controlled module 9, and the discharge controlled module 9 is coupled to the discharge management module 7 to receive the discharge control signal and control the energy feedback bi-directional power supply module 22 to perform an over-discharge test on the lithium battery module 1 in response to the discharge control signal.
Example 2
Referring to fig. 4, the present embodiment is different from embodiment 1 in that a system for testing deep overdischarge of a module battery further includes a first pre-charge module 10, a first voltage detection module 11, a second pre-charge module 12, and a second voltage detection module 13.
When the main control module 5 outputs a main control signal for controlling the charging management module 6, the charging management module 6 and the discharging management module 7 are disconnected, and a first voltage detection module 11, of which both ends are connected to the front end and the rear end of the charging management module 6 for detecting a voltage difference between the front end and the rear end of the charging management module 6, is started.
If the voltage difference between the front and rear ends of the charging management module 6 detected by the first voltage detection module 11 exceeds the first preset voltage difference, the first pre-charging module 10, which is controlled by the main control module 5 and coupled to the charging management module 6 to charge the charging management module 6, receives the main control signal and charges the charging management module 6 in response to the main control signal, so as to keep the voltage difference between the front and rear ends of the charging management module 6 smaller than the preset voltage difference.
When the main control module 5 outputs a main control signal for controlling the discharging management module 7, the charging management module 6 and the discharging management module 7 are disconnected, and the second voltage detection module 13 for detecting the voltage difference between the front end and the rear end of the discharging management module 7 is started.
If the preset undervoltage protection voltage of the discharge management module 7 is greater than or equal to the second preset voltage, the second voltage detection module 13 is started to detect the voltage difference between the front end and the rear end of the discharge management module 7.
If the voltage difference between the front and the rear of the discharge management module 7 detected by the second voltage detection module 13 exceeds the first preset voltage difference, the second pre-charge module 12 receives the master signal and responds to the master signal to charge the discharge management module 7, so as to keep the voltage difference between the front and the rear of the discharge management module 7 smaller than the first preset voltage difference.
If the undervoltage protection voltage of the preset discharge management module 7 is smaller than the second preset voltage, the discharge management module 7 is started first, and then the second voltage detection module 13 is started to detect the voltage difference between the front end and the rear end of the discharge management module 7.
If the voltage difference between the front and rear ends of the discharge management module 7 detected by the second voltage detection module 13 exceeds the first preset voltage difference, the second pre-charge module 12 receives the main control signal and charges the discharge management module 7 in response to the main control signal, and keeps the voltage difference between the front and rear ends of the discharge management module 7 smaller than the first preset voltage difference, where the first preset voltage difference is 5V, and may be other voltages.
Example 3
Referring to fig. 5, the present embodiment is different from embodiment 2 in that the module battery deep overdischarge test system further includes a battery health degree monitoring device 14 for monitoring and acquiring the health degree of the lithium battery module 1, a notification module 15 for sending notification information to a terminal held by a person in charge, a processing terminal 16 for data analysis and processing, a recording and analyzing module 17 for recording the health degree before and after the detection and acquisition of the lithium battery module 1 by the battery health degree monitoring device 14 and analyzing and acquiring a health degree difference, a first database 18 for storing the distribution probability of the battery health degree lower than the fault category corresponding to the preset health degree, a second database 19 for storing the specific problem probability distribution of the fault of the module battery deep overdischarge test system, and a third database 20 for storing the processing times and the processing success rate of different specific problems of different persons in charge with respect to the fault of different module battery deep overdischarge test systems.
If the health degree difference value of the battery exceeding the preset ratio exceeds the preset difference value range or the health degree of the lithium battery module 1 is lower than the preset health degree, the processing terminal 16 starts the notification module 15 to send the notification message to the terminal held by the responsible person.
The health degree of the battery can calculate and obtain the SOH according to the relation between the SOH and the internal resistance of the battery, namely, the internal resistance of the battery at the end of the service life of the battery is the internal resistance value of the battery when the battery leaves a factory, and is the internal resistance of the battery in the current state; the health of the battery can be analyzed by monitoring the internal resistance.
In addition, the notification information sent by the processing terminal 16 to the terminal held by the person in charge by starting the notification module 15 includes specific analysis and judgment of the fault, and the specific analysis and judgment process is as follows:
if and only if the health degree of the lithium battery module 1 is lower than the preset health degree, the processing terminal 16 analyzes the health degree difference of the battery exceeding the preset proportion.
If the health degree difference of the batteries exceeding the preset proportion exceeds a first preset difference, the processing terminal 16 analyzes and determines that the fault type is that the module battery deep overdischarge test system has a fault, wherein the first preset difference can be 0.2 health degree.
If the health degree difference value of the battery exceeding the preset proportion is lower than the first preset difference value and exceeds the second preset difference value, the processing terminal 16 calls the first database 18 to obtain the fault distribution class distribution probability corresponding to the battery health degree lower than the preset health degree, the fault distribution class distribution probability is used as the analyzed and determined current fault class distribution probability, the first preset difference value is defined to be larger than the second preset difference value, and the second preset difference value can be 0.1 health degree.
If the health degree difference of the battery exceeding the preset proportion is lower than a second preset difference, the processing terminal 16 analyzes and determines that the fault type is a battery fault, wherein the processing terminal 16 may be a central processing unit or other terminal equipment.
The processing terminal 16 loads the failure category into notification information sent to the terminal held by the person in charge.
In addition, further considering that the object of the notification information sent by the notification module 15 needs to be the most appropriate person in charge for handling the current fault problem, the specific manner for confirming the person in charge is as follows:
if the fault category analyzed and determined by the processing terminal 16 has a module battery deep overdischarge test system fault, the specific problem probability distribution of the module battery deep overdischarge test system fault is inquired and obtained from the second database 19, and the processing times and the processing success rate of different specific problems of different responsible persons about different module battery deep overdischarge test system faults are inquired and obtained from the third database 20.
The processing terminal 16 adds the processing success rate of each responsible person about the specific problem and the distribution probability of the corresponding specific problem one by one, obtains the sum as the processing success rate of the responsible person, and selects the responsible person with the highest processing success rate as the object notified by the notification module 15.
For example, assume that there is 3 specific problems, i.e., a, b, and c in sequence, where the distribution probability of a is 30%, the distribution probability of b is 40%, the distribution probability of c is 30%, the responsible person is a, the processing success probability of a with respect to a is 80%, the processing success probability of a with respect to b is 90%, and the processing success probability of a with respect to c is 70%, and then the overall processing success rate of a is 81%.
In addition, it is further considered that, on the premise that an object of the notification information sent by the notification module 15 is a most suitable person in charge for handling the current fault problem, it is also required to consider that a subsequent person in charge may not be good at some problems, and needs to start learning again after arriving at the site, so how to facilitate the corresponding person in charge to learn the processing mode of the relevant problem more quickly is as follows:
the processing terminal 16 obtains the processing times and the processing success rate of the different specific problems of the responsible person about the faults of the over-discharge test system with different module battery depths according to the analyzed and determined responsible person.
If the processing times of the partial problems of the responsible person are lower than the preset times, the processing terminal 16 queries and acquires the processing learning video of the problem with the processing times lower than the preset times from the fourth database 21 as a common query object according to the specific problem with the high processing success rate of the responsible person and the problem with the processing times lower than the preset times, analyzes and determines the unique processing learning video as the key reminding content according to the intersection learning part of the specific problem with the high processing success rate of the responsible person and the problem with the processing times lower than the preset times, and uses the intersection learning part as other reminding content, wherein the preset times can be 1 or 2 times and can be specifically set according to needs.
The processing terminal 16 sends the highlight reminding content and other reminding content to the terminal of the responsible person, which may be a mobile phone, a computer or other terminal equipment.
The embodiment of the present application further provides a method for testing deep overdischarge of a module battery, including:
step S100, a charge control signal or a discharge control signal is output.
Step S200, receiving the charging control signal and controlling the energy feedback bi-directional power module 22 to perform the charging test on the lithium battery module 1 in response to the charging control signal.
Step S300, receiving the discharge control signal and controlling the energy feedback bi-directional power module 22 to perform an over-discharge test on the lithium battery module 1 in response to the discharge control signal.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A system for testing deep overdischarge of a battery module, comprising:
the lithium battery module (1) is used for testing charging and overdischarging;
the charge and discharge management module (2) is used for outputting a charge control signal or a discharge control signal;
an energy feedback bidirectional power module (22), one end of which is coupled to an external charging device to discharge to the external charging device so as to feed back surplus electric quantity to a power grid or receive charging of the external charging device, and the other end of which is coupled to the lithium battery module (1) to perform charging and overdischarging tests on the lithium battery module (1);
the two ends of the charge and discharge controlled module (3) are respectively coupled to the lithium battery module (1) and the charge and discharge management module (2) to receive the charge control signal and respond to the charge control signal to control the energy feedback bidirectional power supply module (22) to carry out charge test on the lithium battery module (1), or receive the discharge control signal and respond to the discharge control signal to control the energy feedback bidirectional power supply module (22) to carry out overdischarge test on the lithium battery module (1);
and the power supply module (4) is used for supplying power to the charging and discharging management module (2) and the charging and discharging controlled module (3).
2. The system for testing deep overdischarge of battery modules as claimed in claim 1, wherein the charge and discharge management module (2) comprises:
the main control module (5) is used for outputting a main control signal;
the charging management module (6) is coupled to the main control module (5) to receive the main control signal and output a charging control signal to the charging and discharging controlled module (3);
and the discharge management module (7) is coupled to the main control module (5) to receive the main control signal and output a discharge control signal to the charge and discharge controlled module (3).
3. A modular battery deep overdischarge test system according to claim 2, wherein the charge and discharge controlled module (3) comprises:
the charging controlled module (8) is coupled with the charging management module (6) to receive the charging control signal and respond to the charging control signal to control the energy feedback bidirectional power supply module (22) to carry out charging test on the lithium battery module (1);
and the discharge controlled module (9) is coupled to the discharge management module (7) to receive the discharge control signal and respond to the discharge control signal to control the energy feedback bidirectional power supply module (22) to perform an overdischarge test on the lithium battery module (1).
4. The system of claim 2 or 3, further comprising:
the first pre-charging module (10) is controlled by the main control module (5) and is coupled to the charging management module (6) to charge the charging management module (6), and the voltage difference between the front end and the rear end of the charging management module (6) is kept to be smaller than a preset voltage;
the first voltage detection module (11) is used for detecting the voltage difference of the front end and the rear end of the charging management module (6);
when the main control module (5) outputs a main control signal for controlling the charging management module (6), the charging management module (6) and the discharging management module (7) are disconnected, and the first voltage detection module (11) is started to detect the voltage difference of the front end and the rear end of the charging management module (6);
if the voltage difference between the front end and the rear end of the charging management module (6) detected by the first voltage detection module (11) exceeds a first preset voltage difference, the first pre-charging module (10) receives the master control signal and responds to the master control signal to charge the charging management module (6), and the voltage difference between the front end and the rear end of the charging management module (6) is kept to be smaller than the preset voltage difference.
5. The system of claim 2 or 3, further comprising:
the second pre-charging module (12) is controlled by the main control module (5) and is coupled to the discharge management module (7) to charge the discharge management module (7), and the voltage difference between the front end and the rear end of the discharge management module (7) is kept to be smaller than a preset voltage;
the second voltage detection module (13) is used for detecting the voltage of the front end and the rear end of the discharge management module (7);
when the master control module (5) outputs a master control signal for controlling the discharge management module (7), the charge management module (6) and the discharge management module (7) are disconnected, and a second voltage detection module (13) is started to detect the voltage difference of the front end and the rear end of the discharge management module (7);
if the undervoltage protection voltage of the preset discharge management module (7) is greater than or equal to a second preset voltage, starting a second voltage detection module (13) to detect the voltage difference of the front end and the rear end of the discharge management module (7);
if the voltage difference of the front end and the rear end of the discharge management module (7) detected by the second voltage detection module (13) exceeds the first preset voltage difference, the second pre-charge module (12) receives the master control signal and responds to the master control signal to charge the discharge management module (7), and the voltage difference of the front end and the rear end of the discharge management module (7) is kept to be smaller than the first preset voltage difference;
if the undervoltage protection voltage of the preset discharge management module (7) is smaller than a second preset voltage, starting the discharge management module (7) firstly, and then starting a second voltage detection module (13) to detect the voltage difference of the front end and the rear end of the discharge management module (7);
if the voltage difference of the front end and the rear end of the discharge management module (7) detected by the second voltage detection module (13) exceeds the first preset voltage difference, the second pre-charge module (12) receives the master control signal and responds to the master control signal to charge the discharge management module (7), and the voltage difference of the front end and the rear end of the discharge management module (7) is kept to be smaller than the first preset voltage difference.
6. The system of claim 2 or 3, further comprising:
the battery health degree monitoring device (14) is used for monitoring and acquiring the health degree of the lithium battery module (1);
the notification module (15) is used for sending notification information to the terminal held by the responsible person;
a processing terminal (16) for data analysis processing;
and if and only if the health degree of the lithium battery module (1) is lower than the preset health degree, the processing terminal (16) starts the notification module (15) to send notification information to the terminal held by the responsible person.
7. The system of claim 6, further comprising:
the recording and analyzing module (17) is used for recording the health degree before and after the detection and acquisition of the lithium battery module (1) by the battery health degree monitoring device (14) and analyzing and acquiring a health degree difference value;
if the health degree difference value exceeding the preset ratio battery exceeds the preset difference value range, the processing terminal (16) starts a notification module (15) to send notification information to the terminal held by the responsible person.
8. The system of claim 7, further comprising:
the first database (18) is used for storing the distribution probability of the fault types corresponding to the battery health degrees lower than the preset health degrees and defining the fault types to be divided into the faults of the module battery deep overdischarge test system and the battery faults;
if and only if the health degree of the lithium battery module (1) is lower than the preset health degree, the processing terminal (16) analyzes the health degree difference value of the battery exceeding the preset proportion;
if the health degree difference value of the batteries with the preset proportion exceeds a first preset difference value, the processing terminal (16) analyzes and determines that the fault type is that the module battery deep overdischarge test system has a fault;
if the health degree difference value of the battery exceeding the preset ratio is lower than a first preset difference value and exceeds a second preset difference value, the processing terminal (16) calls the first database (18) to obtain the fault distribution type distribution probability corresponding to the battery health degree lower than the preset health degree, the fault distribution type distribution probability is used as the current fault type distribution probability determined by analysis, and the first preset difference value is defined to be larger than the second preset difference value;
if the health degree difference value of the battery exceeding the preset proportion is lower than a second preset difference value, the processing terminal (16) analyzes and determines that the fault type is a battery fault;
the processing terminal (16) loads the failure category into notification information sent to the terminal held by the person in charge.
9. The system of claim 8, further comprising:
the second database (19) stores the specific problem probability distribution of the module battery deep over-discharge test system faults;
the third database (20) stores the processing times and the processing success rate of different specific problems of different responsible persons about different module battery deep overdischarge test system faults;
if the fault type analyzed and determined by the processing terminal (16) has the fault of the module battery deep overdischarge test system, inquiring and acquiring the specific problem probability distribution of the fault of the module battery deep overdischarge test system from the second database (19), and inquiring and acquiring the processing times and the processing success rate of different specific problems of different responsible persons about the fault of the different module battery deep overdischarge test system from the third database (20);
the processing terminal (16) adds the processing success rate of each responsible person about the specific problem and the distribution probability of the corresponding specific problem one by one, obtains the sum as the processing success rate of the responsible person, and selects the responsible person with the highest processing success rate as the object notified by the notification module (15).
10. A method for testing deep overdischarge of a module battery is characterized by comprising the following steps:
outputting a charging control signal or a discharging control signal;
receiving a charging control signal and responding to the charging control signal to control the energy feedback bidirectional power supply module (22) to carry out charging test on the lithium battery module (1);
and receiving the discharge control signal and responding to the discharge control signal to control the energy feedback bidirectional power supply module (22) to perform overdischarge test on the lithium battery module (1).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117452273A (en) * | 2023-12-07 | 2024-01-26 | 中通维易科技服务有限公司 | Battery charge-discharge performance test system for simulating actual use process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117452273A (en) * | 2023-12-07 | 2024-01-26 | 中通维易科技服务有限公司 | Battery charge-discharge performance test system for simulating actual use process |
| CN117452273B (en) * | 2023-12-07 | 2024-05-24 | 中通维易科技服务有限公司 | Battery charge-discharge performance test system for simulating actual use process |
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