CN220172194U - Lithium ion power battery management device - Google Patents
Lithium ion power battery management device Download PDFInfo
- Publication number
- CN220172194U CN220172194U CN202321681925.8U CN202321681925U CN220172194U CN 220172194 U CN220172194 U CN 220172194U CN 202321681925 U CN202321681925 U CN 202321681925U CN 220172194 U CN220172194 U CN 220172194U
- Authority
- CN
- China
- Prior art keywords
- control board
- circuit
- chip
- battery management
- power battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 40
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 238000005070 sampling Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 9
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000004146 energy storage Methods 0.000 abstract 1
- 238000007726 management method Methods 0.000 description 34
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a lithium ion power battery management device which comprises an algorithm processing main control board and a battery information acquisition slave control board, wherein the main control board is connected with the slave control board through a pin row a and a bus row. The lithium ion power battery management device can effectively provide better voltage, current and temperature collection, and enables the master control board to be communicated with the slave control boards through the high-speed transmission communication circuit, the master control board has strong calculation speed, superposition of a plurality of battery packs can be achieved through cascade connection among the slave boards so as to achieve different voltage levels, and the master control board and the slave control boards can be connected through the pin row a and the pin row bus. The device has the characteristics of simple structure, small volume, good manufacturability, high detection accuracy and high calculation speed, and has wide market prospect in the application of power electronics, aerospace and energy storage systems, especially in the field of electric automobiles.
Description
Technical Field
The utility model relates to the technical field of battery management systems, in particular to the field of lithium ion power battery management systems of electric automobiles, and particularly relates to a lithium ion power battery management device.
Background
The new energy automobile has been accepted by the masses, the lithium battery is used as a main power source of the new energy automobile, compared with the traditional lead-acid battery, the lithium battery has higher specific energy, higher power density and longer cycle service life, and the full life cycle cost of the lithium battery is lower than that of the lead-acid battery along with the popularization of the lithium battery and the gradual improvement of the manufacturing technology. However, the working condition of the lithium battery as an electric automobile is very complex, and the existence of factors such as overcurrent, kinetic energy recovery, battery aging, overcharge, overdischarge and the like during rapid acceleration can cause extremely large load on a power battery pack, and high-temperature alarm and even direct firing events often occur, so that a reliable battery management system (Battery Management System, BMS) plays a vital role in safe and stable operation of the electric automobile.
The traditional battery management device is limited by technology, and certain precision errors exist in monitoring and measuring battery parameters; the complexity of the hardware and software systems involved in design and implementation is not enough, and the performance of a plurality of components including sensors, control circuits, algorithms, communication interfaces and the like is not high enough; the single batteries in the battery pack may have differences, and when the voltage and capacity mismatch phenomenon occurs, the conventional battery management system has no power balancing function or even cannot measure the voltage parameter of each single battery. Therefore, the battery management device is required to be improved and upgraded, the monitoring and measuring precision of the basic physical quantity parameters of the battery is improved, and the functions of the battery management device are enriched, so that the battery management device becomes a more perfect battery protection device.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides a lithium ion power battery management device.
The utility model adopts the following technical scheme:
the lithium ion power battery management device comprises a main control board and a slave control board, wherein the main control board is connected with the slave control board through a pin row a and a bus row;
the main control board comprises a main control chip, an external expansion memory chip, an external expansion operation memory chip, a main control board power supply circuit control chip, a JTAG program downloading interface, a power supply circuit, a main control chip peripheral circuit, a clock crystal oscillator circuit, an external expansion operation memory chip peripheral circuit, an external expansion memory chip peripheral circuit and a pin array a;
the slave control board comprises a slave control board chip, a current sampling resistor, a voltage sampling device, a wiring terminal, a bus bar, a pin b, a high-precision current acquisition circuit, a high-precision single voltage acquisition circuit, a high-precision temperature measurement circuit, a single battery energy equalization circuit, a high-speed transmission communication peripheral circuit, a high-speed transmission communication circuit, a wiring terminal peripheral circuit and a bus bar peripheral circuit.
The lithium ion power battery management device is applied to predicting the charge state of the lithium ion power battery and providing action signals for the lithium ion power battery protection device, and the device is integrally applied to monitoring, measuring and protecting the power battery.
The main control chip controls the whole battery management system device and is used for judging the receiving and transmitting of data and providing calculation force for an algorithm; the external extended operation memory chip can increase the operation memory of the lithium ion power battery management device; the external expansion memory chip can increase the memory of the lithium ion power battery management device.
The high-precision current acquisition circuit is used for measuring the current of the power battery; the high-precision single voltage acquisition circuit is used for measuring the single voltage of the power battery; the high-precision temperature measuring circuit is used for measuring the multipoint temperature of the lithium ion power battery pack; the single battery energy balancing circuit is used for balancing energy among lithium ion power batteries; the high-speed transmission communication circuit is used for carrying out data transmission between the master control board and the slave control board.
Further, the main control chip plays a core control role on the device, inputs basic physical quantity information of a battery and the like, outputs an action signal and performs necessary calculation; the main control chip is a 32-bit floating point type DSP, the main frequency is 150MHz, and the on-chip memory is FLASH-256K 16 bits and SRAM-34K 16 bits.
Further, the external extended running memory chip adds an SRAM chip to the device, providing fast data storage and access to improve the performance and efficiency of the computer system; the external expansion operation memory chip is a high-performance low-power consumption device, and is an 8M (512K x 16) high-speed static RAM.
Further, the external expansion memory chip adds a Flash chip to the device to provide nonvolatile data storage and program storage so as to achieve data persistence and support system functions; the external expansion memory chip supports 8M (512 Kx 16) memory space at the highest.
Further, the chip comprises a MC33771B chip and a MC33664 chip; the wiring terminal comprises a plug-in type 5.08mm wiring terminal and a plug-in type 2.54mm wiring terminal.
Further, the high-precision current acquisition circuit is connected in series into a battery pack power consumption circuit to acquire information on the current of the battery pack to be measured; the high-precision current acquisition circuit uses a sampling resistor of 0.1mΩ.
Furthermore, the high-precision single voltage acquisition circuit uses a second-order low-pass filter circuit for each single voltage measurement channel to ensure the stability and accuracy of circuit operation.
Further, the high-precision temperature measuring circuit measures the multipoint temperature of the device, and each measuring NTC resistor is provided with a temperature sensing channel of a filter; the high-precision temperature acquisition circuit uses 3 NTC resistors with the resistance value of 1k to measure temperature data of 3 points, and can be expanded to 7 measuring points if necessary.
Further, the single battery energy dynamic balancing circuit is a passive balancing circuit, and the balancing capacity is 300mA; the passive equalization can be realized by the built-in metal oxide semiconductor field effect transistor, and the equalization resistance can be adjusted according to different application scenes.
Furthermore, the high-speed transmission communication circuit adopts SPI daisy chain communication technology, has low cost and high transmission speed, and can adopt a loop type daisy chain topological structure to communicate between the slave board and the main board in order to improve the robustness of communication and reduce the communication failure rate.
The utility model has the following technical effects:
1. the sizes of the SRAM and the Flash chip of the main control board of the lithium ion power battery management device can be changed according to the requirements of users, the lithium ion power battery management device has good adaptability, can meet the requirements of different customers, improves the flexibility of products, and is beneficial to mass production of series products;
2. the slave control boards of the lithium ion power battery management device of the utility model, each slave control board supports 7-14 single batteries, any voltage level required by customers can be stacked through cascade connection among the slave control boards, and compared with the traditional BMS device, the slave control boards have higher flexibility, thus greatly reducing the research and development and production costs of the slave control boards;
3. the demand can be realized only by simply physically connecting the pin row a with the slave control board, and compared with the traditional integrated BMS, the master control board can be selected according to the calculation force requirements of different clients on the master control chip;
4. the utility model solves the defects that the traditional BMS device has inaccurate current measurement and can not measure the voltage of the single battery, increases the multipoint temperature acquisition measurement, further enriches the functions of the lithium ion power battery management device, and improves the robustness and portability of the device.
Drawings
Fig. 1 is a schematic diagram of 3D preview of a main control board according to the present utility model;
FIG. 2 is a main control board PCB wiring diagram of the present utility model;
FIG. 3 is a schematic diagram of a main control board of the present utility model;
FIG. 4 is a schematic 3D preview of a slave board according to the present utility model;
FIG. 5 is a wiring diagram of a slave board PCB according to the present utility model;
FIG. 6 is a schematic diagram of a slave control board of the present utility model;
fig. 7 is a flowchart of the operation of the lithium-ion power battery management apparatus of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more clear and clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in conjunction with specific embodiments. It should be noted that the described embodiments of the present utility model are illustrative, but this is not a limitation of the present utility model, and thus the present utility model is not limited to the above-described embodiments. Other embodiments, which are within the scope of the present utility model, are contemplated as falling within the scope of the present utility model, as those of ordinary skill in the art will achieve without undue burden in view of the present utility model.
As shown in fig. 1, a 3D schematic diagram of a main control board of a lithium ion power battery management device, where the main control board includes a main control chip 11, an external extended memory chip 12, an external extended running memory chip 13, a main control board power supply circuit control chip 14, and a JTAG program download interface 15, and the picture represents a 3D image of the physical structure and the element layout of the circuit board in this embodiment. It can provide key information in terms of physical layout, assembly and troubleshooting, facilitating efficient design and production flow.
As shown in fig. 2, a lithium ion power battery management device main control board PCB wiring diagram is a four-layer circuit board drawn by using professional PCB drawing software.
As shown in fig. 3, a schematic diagram of a main control board of a lithium ion power battery management device is used for understanding the working principle of the main control board in more detail and performing early work on PCB wiring. The power supply circuit 21 provides three grades of direct current power supplies of 5V, 3.3V and 1.9V for the main control board of the device; the main control chip 11 and the main control chip peripheral circuits 22 perform computing tasks, control device operations, manage system functions, process and store data for the device, and provide the capability to interface and communicate with the outside; the clock crystal oscillator circuit 23 selects 30MHz external crystal oscillator for the device to provide clock signals for the system; the external extended run memory chip 13 and the external extended run memory chip peripheral circuitry 24 provide run memory for the device; the external expansion memory chip 12 and the external expansion memory chip peripheral circuit 25 provide external memory space for the device; the master control board is electrically connected to the slave control boards and pin a 26 provides a physical circuit connection for the device. All the circuits are concentrated on the main control board, and all the circuits and electronic components are welded by soldering tin.
The main control board power supply circuit control chip 14 adopts an enhanced product double-output low-voltage-drop voltage stabilizer with model number TPS767D301MPWPREP of Texas instruments. The chip is a power management chip integrated with the function of a voltage stabilizer, and the input voltage range is as follows: 2.7V to 7V, output voltage: 3.0V, output current: maximum 1A, high precision output voltage: 2% accuracy, ultra low pressure drop: typical 260mV, low quiescent current: typical 30 μa, short-circuit protection and overheat protection functions, low power standby mode: typical 2 μa, packaging: HTSSOP-20. The chip has stable output voltage and lower ripple, can provide stable power supply, and has a protection function to prevent faults such as overheating and short circuit, thereby ensuring reliable power supply of the main control board of the whole battery management device.
The main control board and main control chip 11 adopts TMS320F28335, and the chip is a digital signal controller produced by Texas instruments, and belongs to a part of C2000 series. The chip processor speed: the main control board of the utility model has high performance computing capability and response speed, and can reach 150MHz at maximum after frequency multiplication and frequency division through the 30MHz clock crystal oscillator circuit 23. A memory: a 128KB Flash memory and a 34KB RAM memory are provided for program code and data storage. And the capacity expansion is carried out by combining the external expansion operation memory chip 13, the external expansion operation memory chip peripheral circuit 24, the external expansion storage chip 12 and the external expansion storage chip peripheral circuit 25 so as to improve the performance of the device. The chip provides rich peripheral interfaces including analog input/output, general timer/counter, PWM module, serial communication interface, etc., in the device of the present utility model, most of the interfaces are led out through 2 pins a 26 of 2 x 40p, wherein pin a is used for connection with a slave control board.
As shown in fig. 4, a slave control board of the lithium ion power battery management device is a 3D schematic diagram, and the slave control board comprises an MC33771B chip 31, a current sampling resistor 32, a voltage sampling device 33, a plug-in 5.08mm connecting terminal 34, a plug-in 2.54mm connecting terminal 35, a busbar 36, an MC33664 chip 37 and a pin B38, where the figures represent 3D images of the physical structure and the element layout of the circuit board of the present embodiment. The device can provide key information in terms of physical layout, assembly and fault elimination, and promote efficient design and production flow, wherein the pin header b is used for testing and externally connecting a display screen for use when the battery management device fails.
As shown in fig. 5, a lithium ion power battery management device is a two-layer circuit board drawn from a control board PCB wiring diagram using professional PCB drawing software. The device also comprises 6 four-hole plug-in type 5.08mm connecting terminals 34, a type 2EHDR-04P connector and 1 20-pin plug-in type 2.54mm connecting terminals 35, and the functions of the terminals are a single voltage interface, a current measurement interface, a temperature measurement interface, a power supply interface and a signal transmission interface.
As shown in fig. 6, a schematic diagram of a slave control board of a lithium ion power battery management device is used for understanding the working principle of the slave control board in more detail and performing early work on PCB wiring. The high-precision current acquisition circuit 41 acquires working current data for the device; the high-precision single cell voltage acquisition circuit 42 acquires single cell voltage data for the device; the high precision temperature measurement circuit 44 collects temperature data for the device; the cell energy equalization circuit 43 provides the device with a passive equalization capability of up to 300mA; the high-speed transmission communication peripheral circuit 45 and the high-speed transmission communication circuit 46 are used for carrying out data transmission between the slave control board and the master control board of the device; the terminal peripheral circuit 47 provides hardware support for the device to collect basic physical information of the battery; the master control board is electrically connected to the slave control boards and the test bus peripheral circuit 48 provides a physical electrical connection for the device.
The core control chip of the slave control board is selected from a chip 31 with the model number of MC33771B of NXP company, the chip supports SPI daisy chain communication, and the pin array a 26 is welded on the slave control board through soldering tin to realize electrical connection; the power supply device is used for connecting 14 single lithium ion power batteries, and the voltage measurement of 14 maximum single batteries can be realized through each slave control board through the plug-in wiring terminal 34; up to 7 temperature sensors measure the multipoint temperature of the present embodiment; the low on-resistance passive cell balancing MOSFET can provide 300mA current balance control; 1 current measurement channel. Diagnostic function: supply voltage: VPWR is 9.6V or less and is 61.6V working voltage or 75V transient voltage.
The high-precision current acquisition circuit 41 of the embodiment is an external circuit which is matched with an internal current induction module of the MC33771B chip 31, and in a measurement matching circuit, two second-order low-pass filter circuits are used for improving the current sampling precision, C HFI ＝47nF，R LPFI ＝127Ω，C LPFI ＝47nF，C d ＝6.8μF,Z di =2v. In the current application, the final precision is error due to the shunt resistance, and current sampling before calibration is needed to further improve the current sampling precision.
The high-precision single-cell voltage acquisition circuit 42 of the embodiment can measure the voltage range of single cells to be 0-5V, each slave control board supports 7-14 single-cell voltage measurement, 15 slave control boards can be cascaded theoretically, and a battery system with the voltage level of 25.9-777V can be realized; the MC33771B chip 31 has an independent internal ADC for converting the battery voltage, one ADC is common to all voltage channels, and over-voltage and under-voltage can be detected by a digital comparator. A second-order low-pass filter circuit is used in each sampling unit to ensure the stability and accuracy of the circuit operation, C HF ＝47nF，R LPF-1 ＝3kΩ，C LPF ＝470nF，R LPF-2 ＝2kΩ，C IN ＝47nF，R BAL And can be arbitrarily selected to support the supply of the equalizing current of 300mA. When the number of power batteries in the slave control board is smaller than 14, the number of batteries of the slave control board system of the utility model is required to be larger than 7, and CELL 1-CELL 4 and CELL 12-CELL 14 are required to be used.
The high-precision temperature measurement circuit 44 in this embodiment can be used to measure the temperature of the battery pack, the temperature of the shunt resistor, the temperature of the contactor, the temperature of the control module, etc., and can realize the temperature measurement of any point of the whole device by connecting the connecting terminal 34 with 5.08mm in a pluggable manner with the NTC temperature measuring resistor. The design supports temperature measurement of 7 points at most from the control board, and GPIO of the MC33771B chip 31 is used as signal input. This example R TC ＝10kΩ，R NTC ＝10kΩ，C NTC ＝2200pF，R LPFT ＝10kΩ，C LPFT =1000 Pf. The induction range is-40-140 ℃ and the error is less than 1 ℃.
The battery cell energy balance peripheral circuit 42 in this embodiment is a passive balance circuit, and can implement passive balance by incorporating a mosfet, and can support 300mA current balance, and the balance resistance can be adjusted according to different application scenarios. The passive energy equalization circuit R BAL ＝80Ω，R BAL_C ＝20Ω，V LEAK When the two balanced CELL use the same MOSFET, the balanced resistance is R Balanced resistor ＝R BAL +R BAL_C =100Ω. The MOSFET is a MOSFET inside the MC33771B chip 31.
The high speed transmission communication circuit 46 of the present embodiment uses SPI daisy-chain communication, which has advantages of high transmission speed and low cost compared to conventional CAN communication. The MC33771B chip 31 can perform data transmission with the MC33664 chip 37 only through two wires, namely RDTX and ROTX. When a plurality of slave control boards are in cascade connection for communication, a loop type daisy chain can be adopted for communication, when a breakpoint occurs, nodes before the breakpoint can be communicated in the forward direction, nodes after the breakpoint can be communicated in the reverse direction, and therefore failure rate of a system is effectively reduced, and robustness of daisy chain communication is improved.
The specific implementation steps of the lithium ion power battery management device are as shown in fig. 7, and the specific implementation steps include:
in step S1, the battery data is monitored, and the slave control board in this embodiment monitors the voltage, current, temperature and other related parameters of the battery in real time through the internal sensor and the external measuring circuit of the battery and through the pluggable connection terminal 34, and sends the monitored data to the MC33771B chip 31.
In step S2, data is collected and transmitted, and the slave control board communication MC33664 chip 37 of the present embodiment is responsible for sending and receiving data from the battery. The data of voltage, current, temperature and the like are transmitted to the main control chip 11 of the main control board through the SPI daisy chain for subsequent processing and analysis.
And S3, analyzing and calculating the data, wherein the main control chip 11 of the main control board analyzes and calculates the received battery data. The state, the residual capacity, the health condition and the like of the battery can be estimated through a pre-downloaded program algorithm, and calibration and correction can be carried out according to the requirement.
Step S4, charge and discharge control is performed, and the embodiment controls the battery charging process according to the battery state and the charging requirement. It can monitor the charging current and voltage and ensure that the battery is charged within safe and efficient ranges. And the discharging process of the battery ensures that the battery is discharged within a safe and effective range. It can control the discharge rate and limit the depth of discharge to protect the battery from overdischarge.
In step S5, the equalization control, for the battery system in which the plurality of slave control boards are cascaded, may implement passive energy equalization between each single battery. The voltage and capacity difference of each single battery in the battery pack is monitored, passive equalization can be realized through the built-in metal oxide semiconductor field effect transistor, and 300mA current equalization can be supported.
In step S6, the device in this embodiment monitors abnormal conditions of the battery, such as over-temperature, over-current, over-voltage, under-voltage, etc., and sends out an alarm in time. The main control chip 11 of the main control board can also take corresponding measures, such as sending action command signals to the external relay, so as to cut off the battery power supply or reduce the current, thereby protecting the safety of the battery and the system.
In step S7, the device in this embodiment records the operation data of the battery, including battery parameters, charging and discharging processes, fault events, etc., and stores the external expansion memory chip 12 and the external expansion memory chip peripheral circuit 25 of the main control board for performance analysis, life prediction and fault diagnosis.
In summary, according to the lithium ion power battery management device in the technical scheme, multiple voltage levels can be realized through cascade connection among the slave control boards according to the requirements of users, and basic physical quantity information of the power battery in use is measured and transmitted to the main control board for calculation and analysis, so that the power battery can be effectively protected, and the lithium ion power battery management device has the advantages of being simple in operation, low in cost and high in reliability.
By way of illustration and the accompanying drawings, there is shown exemplary examples of specific structures of the embodiments and other variations may be made based on the spirit of the utility model. While the above utility model is directed to the presently preferred embodiments, such disclosure is not intended to be limiting.
Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the utility model. Any and all equivalents and alternatives falling within the scope of the claims are intended to be embraced therein.
Claims (10)
1. The lithium ion power battery management device is characterized by comprising a main control board and a slave control board, wherein the main control board is connected with the slave control board through a pin row a and a bus row;
the main control board comprises a main control chip, an external expansion memory chip, an external expansion operation memory chip, a main control board power supply circuit control chip, a JTAG program downloading interface, a power supply circuit, a main control chip peripheral circuit, a clock crystal oscillator circuit, an external expansion operation memory chip peripheral circuit, an external expansion memory chip peripheral circuit and a pin array a;
the slave control board comprises a slave control board chip, a current sampling resistor, a voltage sampling component, a wiring terminal, a bus bar, a pin b, a high-precision current acquisition circuit, a high-precision single voltage acquisition circuit, a high-precision temperature measurement circuit, a single battery energy equalization circuit, a high-speed transmission communication peripheral circuit, a high-speed transmission communication circuit, a wiring terminal peripheral circuit and a bus bar peripheral circuit.
2. The li-ion power battery management apparatus of claim 1, wherein the master control chip is a 32-bit floating-point DSP with a primary frequency of 150MHz, and the on-chip memory is FLASH-256k x 16 bits and SRAM-34k x 16 bits.
3. The li-ion power battery management apparatus of claim 1, wherein the external extended run memory chip is a high performance low power device, 8M high speed static RAM.
4. The lithium-ion power battery management device of claim 1, wherein the external expansion memory chip supports up to 8M memory space.
5. The lithium-ion power battery management device of claim 1, wherein the chip comprises a MC33771B chip, a MC33664 chip; the wiring terminal comprises a plug-in type 5.08mm wiring terminal and a plug-in type 2.54mm wiring terminal.
6. The lithium-ion power battery management apparatus of claim 1, wherein the high-precision current collection circuit uses a sampling resistance of 0.1mΩ.
7. The lithium-ion power battery management device of claim 1, wherein the high-precision cell voltage acquisition circuit uses a second-order high-pass filter circuit.
8. The lithium-ion power battery management device according to claim 1, wherein the high-precision temperature acquisition circuit uses 3 NTC resistors with a resistance value of 1k to measure temperature data of 3 points, and can be extended to 7 measurement points if necessary.
9. The lithium ion power battery management device according to claim 1, wherein the single battery energy dynamic balancing circuit is a passive balancing circuit, and the balancing capacity is 300mA.
10. The lithium-ion power battery management device according to claim 1, wherein the high-speed transmission communication adopts SPI daisy-chain communication, and system robustness is improved through a loop-type daisy-chain connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321681925.8U CN220172194U (en) | 2023-06-29 | 2023-06-29 | Lithium ion power battery management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321681925.8U CN220172194U (en) | 2023-06-29 | 2023-06-29 | Lithium ion power battery management device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220172194U true CN220172194U (en) | 2023-12-12 |
Family
ID=89064193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321681925.8U Active CN220172194U (en) | 2023-06-29 | 2023-06-29 | Lithium ion power battery management device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220172194U (en) |
-
2023
- 2023-06-29 CN CN202321681925.8U patent/CN220172194U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7471337B2 (en) | Monitoring system for series-connected battery cells | |
| US11067635B2 (en) | Battery cell evaluation system | |
| US11846678B2 (en) | Method and system for validating a temperature sensor in a battery cell | |
| KR20130123098A (en) | Balancing system for battery and method for balancing of battery using the same | |
| CN113253134A (en) | Portable electric energy system and measuring method thereof | |
| US11215669B2 (en) | Apparatus and method for measuring voltage | |
| CN108333548A (en) | Insulation resistance measuring apparatus and fault self-diagnosis method | |
| EP3579006B1 (en) | Validation of a temperature sensor of a battery cell | |
| CN113300005B (en) | Electric quantity detection device and method and electronic equipment | |
| CN102375124A (en) | Battery capacity test device | |
| KR20190075609A (en) | Apparatus and method for diagnosing fault of current sensor | |
| CN112014751B (en) | SOC estimation method based on estimation of actual dischargeable capacity of lithium ion battery | |
| TWI613455B (en) | Expandable modular battery capacity estimation system | |
| CN220172194U (en) | Lithium ion power battery management device | |
| CN102253346A (en) | Method and device for automatically testing battery charging | |
| Qahtan et al. | IoT-based electrical vehicle’s energy management and monitoring system | |
| CN116027207A (en) | Battery electric quantity detection circuit, electronic equipment and electric quantity metering method | |
| CN211744085U (en) | Protection circuit and power supply | |
| US11397200B2 (en) | Current measuring apparatus and method | |
| CN213069108U (en) | Battery pack residual capacity measuring circuit | |
| CN112557915A (en) | Electric quantity detection circuit, electric quantity detection method and electronic equipment | |
| CN218350461U (en) | BMS test fixture | |
| CN114706004B (en) | Method, device, equipment and medium for determining residual electric quantity of battery core in battery pack | |
| CN216509192U (en) | Multi-battery pack power supply management device of portable testing equipment of airplane | |
| CN219122369U (en) | Monitoring circuit and protection system of two-in-one battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |