CN108414945A - A kind of device of screening new-energy automobile dynamic lithium battery - Google Patents
A kind of device of screening new-energy automobile dynamic lithium battery Download PDFInfo
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- CN108414945A CN108414945A CN201810271134.5A CN201810271134A CN108414945A CN 108414945 A CN108414945 A CN 108414945A CN 201810271134 A CN201810271134 A CN 201810271134A CN 108414945 A CN108414945 A CN 108414945A
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- battery pack
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related 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
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Abstract
The present invention relates to a kind of devices of screening new-energy automobile dynamic lithium battery, including：Two-way inverter, connect with battery pack, for being battery pack charge or discharge under different operating modes；CAN communication module, including CAN controller and CAN transceiver, CAN controller are connect by CAN transceiver with battery pack, the message for acquiring the battery status information that power battery pack BMS is sent out；Test controller is connect with CAN controller, for collected message under different operating modes to be read out and parsed, calculates parameter information of the battery pack under different operating modes, and based on the conformity classification battery pack of battery pack parameter information under different operating modes.Compared with prior art, the present invention uses two-way inverter under different operating modes for battery pack charge or discharge, and the conformity classification battery pack of the parameter information based on battery pack under different operating modes, improves the efficiency and accuracy of battery pack screening.
Description
Technical field
The present invention relates to a kind of lithium battery screening plants, more particularly, to a kind of screening new-energy automobile dynamic lithium battery
Device.
Background technology
Power source of the power battery as vehicle, when power battery performance drops to the 80% of originality energy, it is impossible to reach
To the use standard of pure electric automobile.Performance Evaluation is carried out to retired battery, the good battery of screening consistency is for energy storage etc.
Field helps to improve energy utilization rate.
Currently, most widely used on automobile is CAN_bus fieldbus, using the combination of control chip+CAN controller
Mode, communication can easily be run by electromagnetic interference, program to fly.The retired battery pack got off, model differ from bus, bus
Sample, the agreement for analytic message can be according to different battery manufacturers without the same, and parsing can only be directed to the electricity of specific company
Pond message.The information of all single batteries in a large amount of acquisition battery packs is needed for the MCU control chips of analytic message, calculating
Amount, and packet parsing and data calculating are carried out in MCU, processor load is big, empty to the speed of service of processor, storage
Between, heat-resistant stable have very high requirement.8 common 51 microcontroller speeds of service all can not meet the requirement of the device,
And Anti-high temperature chip price.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of screening new energy vapour
The device of vehicle dynamic lithium battery.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of device of screening new-energy automobile dynamic lithium battery, including：
Two-way inverter, connect with battery pack, for being battery pack charge or discharge under different operating modes；
CAN communication module, including CAN controller and CAN transceiver, the CAN controller pass through CAN transceiver and battery
Group connection, the message for acquiring the battery status information that power battery pack BMS is sent out；
Test controller is connect with CAN controller, for being read out reconciliation to collected message under different operating modes
Analysis calculates parameter information of the battery pack under different operating modes, and based on the consistency of battery pack parameter information under different operating modes
Screen battery pack.
The CAN controller includes CAN process kernels, sends buffer zone module, acceptance fitration, receives buffer zone module
With interface management logic module, the transmission buffer zone module is connect with CAN process kernels, and the buffer zone module that receives passes through
Acceptance fitration is connect with CAN process kernels, and the interface management logic module is slow with transmission buffer zone module and receiving respectively
Rush area's module and test controller connection；
The reception buffering area receives new message while test controller handles message, and the acceptance fitration will
The examination code of storage is compared with the identification code of the message of reception, only reception and the information-related message of single battery, at the CAN
It manages kernel and executes error detection, arbitration, error handle, provide the programmable period to compensate propagation delay time, phase turn
Change.
The end TX, RX of the CAN transceiver is connect with CAN controller, is respectively used to outputting and inputting for data；CAN
The data inputted by CAN controller are converted to CAN signal level by transceiver, to CAN bus on be transmitted, and from CAN
Signal level is converted into logic level to CAN controller in bus.
For a battery pack, it is 5~10 times that two-way inverter, which carries out it charge and discharge number,.
The parameter information includes electric current, voltage, DC internal resistance, characterization internal resistance.
The test controller includes message parameter parsing module, passes through the CAN message solution in undated parameter parsing module
Parameter list is analysed, different agreement is parsed with realizing.
Compared with prior art, the invention has the advantages that：
1) use two-way inverter under different operating modes for battery pack charge or discharge, and based on battery pack in different operating modes
Under parameter information conformity classification battery pack, improve battery pack screening efficiency and accuracy.
2) it is extended using CAN controller as the external RAM of test controller, reduces the sky configured needed for test controller
Between, small by communication electromagnetic interference, program, which is not easy to run, to fly.
3) present invention can assess the performance and the surplus value of retired battery pack, and performance scalability is strong, can be directed to
Different vendor's battery updates packet parsing parameter list, improves energy utilization rate.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is that test controller controls chip structure block diagram；
Fig. 3 is CAN controller structure diagram；
Fig. 4 is that experiment carries out experimental data schematic diagram in 7 cyclic processes；
Fig. 5 is mono- cycle charge-discharge stage DC internal resistance of Fig. 4, characterization internal resistance details enlarged drawing；
Fig. 6 is the details enlarged drawing of DC internal resistance part in mono- cycle of Fig. 5；
Fig. 7 is Fig. 6 ohmic internal resistances and polarization resistance schematic diagram；
Wherein：1, two-way inverter, 2, battery pack, 3, CAN transceiver, 4, CAN controller, 5, test controller.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
A kind of device of screening new-energy automobile dynamic lithium battery, to solve these problems, the application is to retired battery pack 2
Re-test of the different operating modes at a temperature of is carried out, chip is controlled using the M2 of upper seamount meaning microelectric technique Co., Ltd research and development,
MCU can stablize under various circumstances, high-speed acquisition and dissection process data, 2 performance indicator parameter of final determining battery pack are right
Battery is screened.
Specifically, as shown in Figure 1, including：
Two-way inverter 1 using the two-way inverters 1 of PCS is specially the Expos in 2010 provided by state's net in the present embodiment
The retired 80V, 60A to get off, the module of 24 strings 1 simultaneously, connect with battery pack 2, for being battery under different operating modes on meeting bus
2 charge or discharge of group；
CAN communication module, including CAN controller 4 and CAN transceiver 3, CAN controller 4 pass through CAN transceiver 3 and battery
2 connection of group, the message for acquiring the battery status information that power battery pack 2BMS is sent out；
Test controller 5 is connect with CAN controller 4, for being read out reconciliation to collected message under different operating modes
Analysis, calculates parameter information of the battery pack 2 under different operating modes, and based on battery pack 2 under different operating modes parameter information it is consistent
Property screening battery pack 2.
Battery pack 2 in the present embodiment is using retired come with the two-way inverters of PCS 1 to power electric by bus or public transport
Pond group 2 carries out the charge-discharge test under specific operation.Test controller 5 is using the research and development of upper seamount meaning microelectric technique Co., Ltd
M2 control chip, 32 bit processors, general structure is to be based on as shown in Fig. 2, it is a homemade chip of independent research
The reduced instruction type processor of MIPS frameworks, the bit processor of 32bit, the flash memory spaces of 128k, 2 UART/LIN are logical
Believe serial ports, 16 I/O ports and 8 unidirectional delivery outlets are connect with CAN controller 4.
The register of CAN controller can be accessed by M2 by sequential, and operation and control are written and read to CAN controller 4
Feature operation processed, the external RAM space of the register of CAN controller 4 as main control chip M2, concrete structure such as Fig. 3 institutes
Show, CAN controller 4 includes CAN process kernels, sends buffer zone module, acceptance fitration, receives buffer zone module and mouthpiece
Logic module is managed, buffer zone module is sent and is connect with CAN process kernels, receive buffer zone module and pass through acceptance fitration and CAN
Process kernel connects, interface management logic module respectively with send buffer zone module and receive buffer zone module, and test is controlled
Device 5 processed connects；
It receives buffering area and receives new message while test controller 5 handles message, acceptance fitration is by storage
Code is checked and accepted compared with the identification code of the message of reception, only receives and is executed with the information-related message of single battery, CAN process kernels
Error detection, arbitration, error handle provide the programmable period to compensate propagation delay time, phase conversion.
The end TX, RX of CAN transceiver is connect with CAN controller 4, is respectively used to outputting and inputting for data；CAN is received and dispatched
The data inputted by CAN controller 4 are converted to CAN signal level by device 3, to CAN bus on be transmitted, and it is total from CAN
Signal level is converted into logic level to CAN controller 4 on line, as shown in figure 3, using CAN controller 4 and CAN transceiver 3
Integration module saves space, improves transmission stability.
For a battery pack 2, it is 5~10 times that two-way inverter 1, which carries out it charge and discharge number, and parameter information includes straight
Flow internal resistance and characterization internal resistance, wherein DC internal resistance=ohmic internal resistance+polarization resistance.
Test controller 5 includes message parameter parsing module, and ginseng is parsed by the CAN message in undated parameter parsing module
Number table, parses the different agreement of the different battery packs 2 of different Battery Plants with realizing.
For example, in the experiment of 0 degrees centigrade carried out at room temperature, the test work step of design is as shown in table 1：
Table 1
| Walk label | Control Cooling | Controlling value | |
| 1 | Step 1 | It stands | |
| 2 | Survey DC internal resistance | Constant current charge-discharge (A) | 8 |
| 3 | Step 3 | It stands | |
| 4 | Step 4 | Constant current charge-discharge (A) | -8 |
| 5 | Step 5 | Reset charge/discharge capacity | |
| 6 | Survey characterization internal resistance | Constant current charge-discharge (A) | 0.8 |
| 7 | Step 7 | It stands | |
| 8 | Step 8 | Constant current charge-discharge (A) | -0.8 |
| 9 | Step 9 | It stands | |
| 10 | Ladder discharges | Constant current charge-discharge (A) | -8 |
| 11 | Cycle | Reset charge/discharge capacity |
Charge/discharge capacity is reset in 1 step 5 of table, refers to the value of record data being reset, rather than battery capacity is discharged
To 0；The purpose of step 10 ladder electric discharge is to change to reduce Soc.
After primary experiment carries out 7 cycles, the cut-off condition of trigger voltage, primary experiment terminates, and the results are shown in Figure 4,
The abscissa of wherein Fig. 4 indicates the number that complete cycle carries out, and is charging and discharging currents value (A) on the left of ordinate；Right side is battery
Voltage value (V).
From fig. 4, it can be seen that after calibration, to the first standing → 1C charging pulses → standing → 1C discharge pulses → with 0.1C of battery pack
Multiplying power discharging terminates after 7 cycles, and SOC (battery charge amount) is gradually decreased, until voltage drops to blanking voltage, such as Fig. 4 institutes
Show.The one cycle once tested from Fig. 4 interceptions below is amplified explanation, as shown in Figure 5 and Figure 6,
As shown in figure 5, being respectively divided into charging stage and discharge regime, characterization internal resistance and DC internal resistance are measured, such as Fig. 6 institutes
Show, DC internal resistance is represented by ohmic internal resistance and polarization resistance.In Fig. 7, respectively once test 7 times cycles of 1-7 as a result,
1 cycle of ordinate includes two kinds of charge and discharge, is charged and discharged separate computations, judges consistency, screens the electricity under different demands
Pond group.
In addition to this, the voltage value obtained with this device measurement by carrying out static accuracy experiment and multimeter measurement
Voltage value is compared, and compares measurement accuracy.Quiescent voltage acquisition is more as shown in table 2 with actual value：
Table 2
| Single battery number | Measured value/v | Gathered data/v | Error/% |
| 1 | 3.1 | 3.1101 | 0.33 |
| 2 | 3.09 | 3.0931 | 0.1 |
| 3 | 3.1 | 3.1059 | 0.19 |
| 4 | 3.1 | 3.1055 | 0.18 |
| 5 | 3.1 | 3.106 | 0.19 |
| … | … | … | … |
| … | … | … | … |
| 20 | 3.1 | 3.1061 | 0.2 |
| 21 | 3.11 | 3.1156 | 0.18 |
| 22 | 3.11 | 3.1152 | 0.17 |
| 23 | 3.11 | 3.1165 | 0.21 |
| 24 | 3.13 | 3.1132 | 0.1 |
| Battery pack | 75.3 | 75.503 | 0.4 |
The error that battery cell measures it can be seen from 2 data of table is up to 0.33%, much smaller than national standard
0.5%；2 error of battery pack is 0.40%, is less than national standard 0.5%, it can be seen that, this device high certainty of measurement, accurately and reliably.
The application is versatile, in addition to calculate DC internal resistance, AC internal Resistance etc., other parameters related with battery performance,
It can all be measured by this device.This experiment carries out under 0 degree Celsius of environment temperature, under -40 to 100 degrees Celsius of environment
Can carry out.Job stability is strong, does not occur situations such as program fleet substantially.It can quickly be filtered out by this device and meet performance
Battery, operational efficiency is high, maximumlly carries out echelon utilization, improves energy utilization rate.Batch application can greatly save industry
Cost.
Claims (6)
1. a kind of device of screening new-energy automobile dynamic lithium battery, which is characterized in that including：
Two-way inverter, connect with battery pack, for being battery pack charge or discharge under different operating modes；
CAN communication module, including CAN controller and CAN transceiver, the CAN controller are connected by CAN transceiver and battery pack
It connects, the message for acquiring the battery status information that power battery pack BMS is sent out；
Test controller is connect with CAN controller, for collected message under different operating modes to be read out and parsed, is counted
Parameter information of the battery pack under different operating modes is calculated, and based on the conformity classification of battery pack parameter information under different operating modes electricity
Pond group.
2. a kind of device of screening new-energy automobile dynamic lithium battery according to claim 1, which is characterized in that described
CAN controller includes CAN process kernels, sends buffer zone module, acceptance fitration, receives buffer zone module and interface management is patrolled
Volume module, the transmissions buffer zone module are connect with CAN process kernels, it is described receive buffer zone module by acceptance fitration and
CAN process kernels connect, and the interface management logic module buffer zone module and receives buffer zone module with sending respectively, and
Test controller connects；
The reception buffering area receives new message while test controller handles message, and the acceptance fitration will store
Examination code compared with the identification code of the message of reception, only receive with the information-related message of single battery, in CAN processing
Core executes error detection, arbitration, error handle, provides the programmable period to compensate propagation delay time, phase conversion.
3. a kind of device of screening new-energy automobile dynamic lithium battery according to claim 1, which is characterized in that described
The end TX, RX of CAN transceiver is connect with CAN controller, is respectively used to outputting and inputting for data；CAN transceiver will be by CAN
The data of controller input are converted to CAN signal level, to CAN bus on be transmitted, and from CAN bus signal is electric
Flat turn changes logic level into CAN controller.
4. a kind of device of screening new-energy automobile dynamic lithium battery according to claim 1, which is characterized in that for one
A battery pack, it is 5~10 times that two-way inverter, which carries out it charge and discharge number,.
5. a kind of device of screening new-energy automobile dynamic lithium battery according to claim 1, which is characterized in that the ginseng
Number information includes electric current, voltage, DC internal resistance and characterization internal resistance.
6. a kind of device of screening new-energy automobile dynamic lithium battery according to claim 1, which is characterized in that the survey
It includes message parameter parsing module to try controller, by the CAN message analytic parameter table in undated parameter parsing module, to realize
Different agreement is parsed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113702850A (en) * | 2021-08-27 | 2021-11-26 | 深圳市新威尔电子有限公司 | Battery detection method for transmitting CAN message based on process flow |
| CN115085895A (en) * | 2022-06-29 | 2022-09-20 | 章鱼博士智能技术(上海)有限公司 | Energy storage information synchronization system and method |
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