CN116916374B - Wireless BMS channel quality evaluation method and system for power battery - Google Patents
Wireless BMS channel quality evaluation method and system for power battery Download PDFInfo
- Publication number
- CN116916374B CN116916374B CN202311178872.2A CN202311178872A CN116916374B CN 116916374 B CN116916374 B CN 116916374B CN 202311178872 A CN202311178872 A CN 202311178872A CN 116916374 B CN116916374 B CN 116916374B
- Authority
- CN
- China
- Prior art keywords
- wireless
- channel quality
- wireless bms
- bms
- judging
- 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
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000013441 quality evaluation Methods 0.000 title claims abstract description 24
- 238000012797 qualification Methods 0.000 claims abstract description 35
- 230000006854 communication Effects 0.000 claims description 62
- 238000004891 communication Methods 0.000 claims description 61
- 238000013461 design Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000011156 evaluation Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 13
- 239000000178 monomer Substances 0.000 description 6
- 238000005070 sampling Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
-
- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the technical field of power batteries, in particular to a wireless BMS channel quality evaluation method and system for a power battery. The method comprises the following steps of: s1, judging the qualification of the wireless BMS channel quality based on the stability of a transmission signal, and if the stability does not reach the standard, judging that the channel quality is unqualified; s2, if the stability meets the standard, judging the qualification of the wireless BMS channel quality based on the validity of the transmitted signal, and if the validity does not meet the standard, judging that the channel quality is not qualified; and S3, if the validity meets the standard, judging the qualification of the wireless BMS channel quality based on the rationality of the transmitted signal, if the rationality does not meet the standard, judging that the channel quality is unqualified, and if the rationality meets the standard, judging that the channel quality is qualified. The method and the device can accurately judge the channel quality condition of the wireless BMS of the power battery.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a wireless BMS channel quality evaluation method and system for a power battery.
Background
The power battery is the heart of the electric automobile, and provides energy for the electric automobile, and BMS is the key part of the power battery, and the power battery is high-efficient safe application and is protected to navigate. At present, most of BMS in the market adopts a wired mode to carry out data transmission, and wired BMS has two drawbacks, firstly, the battery package needs to be considered when designing with BMS and walks the line, influences the overall design of the battery package, and then influences the integrated efficiency of the battery package, secondly, wired arrangement exists pencil circuit break, short-circuit risk when the battery package actually operates, influences data sampling and transmission, and then causes vehicle and personnel safety risk. BMS adopts wireless communication mode, can optimize battery package structural design and integrated efficiency, can avoid pencil risk simultaneously, improves vehicle security performance, so wireless BMS has obtained rapid development.
For example, chinese patent No. CN115601948A entitled "a lithium ion battery wireless control method, system, and vehicle", which describes a system employing a wireless control battery, in which a master controller wakes up slave controllers in a wireless broadcast manner; receiving a sampling instruction from a main controller by a slave controller; the slave controller collects battery information and sends the battery information to the master controller in a wireless communication mode; the main controller receives the battery information, completes the periodic sampling, and the system and the vehicle correspond to the control method. The wireless communication mode adopted here is actually a data communication control mode based on the wireless BMS, that is, a mode of adopting wireless transmission between the master controller and the slave controller for data exchange. The wireless BMS is also divided into a wireless BMS slave board and a wireless BMS main board, the wireless BMS main board is responsible for balanced calculation of a power battery during operation, and related balanced instructions are transmitted to the wireless BMS slave board through a channel, the wireless BMS system solves the problems of large occupied space and complex circuit of a wired BMS system, but the system does not mention the flow of judging the channel quality, and for the wireless BMS system, the channel quality is a key factor about the whole data information exchange and even affects the safety state of the battery and the vehicle, so that the channel quality is required to be judged for the power battery assembled with the wireless BMS system.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a power battery wireless BMS channel quality evaluation method and an evaluation system.
The technical scheme of the invention is as follows: a wireless BMS channel quality evaluation method of a power battery is carried out according to the following steps:
s1, after the wireless BMS main board and the wireless BMS slave board are electrified and work, judging the qualification of the wireless BMS channel quality based on the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board, and judging that the channel quality is unqualified if the stability is unqualified;
s2, if the stability meets the standard, judging the qualification of the wireless BMS channel quality based on the effectiveness of the signal sent by the wireless BMS slave board to the wireless BMS main board, and if the effectiveness does not meet the standard, judging that the channel quality is unqualified;
s3, if the effectiveness meets the standard, judging the qualification of the wireless BMS channel quality based on the rationality that the wireless BMS slave board transmits signals to the wireless BMS main board, if the rationality does not meet the standard, judging that the channel quality is unqualified, and if the rationality meets the standard, judging that the channel quality is qualified.
According to the wireless BMS channel quality evaluation method for the power battery provided by the application, in step S1, the method for judging the stability of the wireless BMS channel quality based on the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board includes: and acquiring the time of the communication period of the signal sent by the wireless BMS slave board to the wireless BMS master board, calculating the difference value between the time of each communication period and the design value, judging that the communication period is stable if the ratio of the difference value to the design value is not greater than a set threshold value, and judging that the communication period is unstable if the difference value is not greater than the set threshold value.
According to the wireless BMS channel quality evaluation method for the power battery, in the step S1, if all continuous T communication periods are unstable, judging that the channel quality is unqualified, otherwise, judging that the channel quality is qualified; and T is an integer greater than 2.
According to the wireless BMS channel quality evaluation method for a power battery provided by the application, in step S2, the method for judging the qualification of the wireless BMS channel quality based on the validity of the signal sent by the wireless BMS slave board to the wireless BMS main board includes: the wireless BMS main board receives the battery cell voltage signals sent by the wireless BMS slave board, the wireless BMS main board processes the battery cell voltage signals to form an equalization instruction array, the equalization instruction array is an array which is 0 when the battery cells need to be equalized and is 1 when the battery cells do not need to be equalized, if NULL value NULL occurs in the equalization instruction array or the number which exceeds the effective range and is not 0 or 1 or the dimension of the equalization instruction array is unequal to the number of the battery cell voltages acquired by the wireless BMS slave board, the equalization instruction array is judged to have invalid values, otherwise, the equalization instruction array is judged to have no invalid value, and the equalization instruction array is effective.
According to the wireless BMS channel quality evaluation method for the power battery provided by the application, in step S3, the method for judging the qualification of the wireless BMS channel quality based on the rationality of the wireless BMS slave board transmitting signals to the wireless BMS main board includes: the wireless BMS mainboard converts the cell voltage data sent by the wireless BMS slave board into balanced instruction data according to the voltage condition, the wireless BMS slave board compares the balanced instruction with the corresponding cell voltage data after receiving the balanced instruction sent by the wireless BMS mainboard, if the two are completely matched, the balanced instruction is judged to be reasonable, otherwise, the balanced instruction is unreasonable.
According to the wireless BMS channel quality evaluation method for the power battery, the wireless BMS main board converts cell voltage data sent by the wireless BMS slave board into an equalization instruction according to voltage conditions, and the method comprises the following steps:
setting the balance instruction of the battery cell with the battery cell voltage outside the set voltage range as 1, and setting the balance instruction of the battery cell with the battery cell voltage within the set voltage range as 0;
alternatively, the cell balancing command for the cell whose cell voltage exceeds the upper limit of the set voltage range is set to 1, and the cell balancing command for the cell whose cell voltage does not exceed the upper limit of the set voltage range is set to 0.
The application also provides a wireless BMS channel quality evaluation system of the power battery, which adopts the wireless BMS channel quality evaluation method of the power battery, and comprises the following steps of,
the stability judging module is used for judging the qualification of the wireless BMS channel quality according to the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board;
the validity judging module is used for judging the qualification of the wireless BMS channel quality according to the validity of the signal sent by the wireless BMS slave board to the wireless BMS main board under the condition that the signal sending is stable;
the rationality judging module is used for judging the qualification of the wireless BMS channel quality according to the rationality that the wireless BMS slave board transmits signals to the wireless BMS mainboard under the condition that the transmitted signals are effective.
According to the wireless BMS channel quality evaluation system for power battery provided by the application, the stability judging module comprises,
the communication cycle time acquisition module is used for acquiring the time of a communication cycle of a signal sent by the wireless BMS slave board to the wireless BMS main board;
the time comparison module calculates the ratio of the difference value of the acquired communication cycle time and the design value to the design value;
and the stability calculation module compares the ratio with a set threshold, and outputs qualified channel quality when the ratio is not more than the set threshold and fails to reach the standard when the ratio is more than the set threshold.
According to the wireless BMS channel quality evaluation system for power battery provided by the application, the validity judging module comprises,
the balanced instruction array acquisition module is used for converting the voltage signals of the battery cells into balanced instruction arrays in a mode of 0 when the battery cells need to be balanced and 1 when the battery cells do not need to be balanced;
and the effectiveness calculation module is used for outputting qualified channel quality to reach the standard when NULL value NULL appears in the equalization instruction array, or the value is not 0 or 1 when the effective range is exceeded, or the dimension of the equalization instruction array is unequal to the number of the cell voltages acquired by the wireless BMS slave board, otherwise, the qualified channel quality is not reached.
According to the wireless BMS channel quality evaluation system for the power battery provided by the application, the rationality judgment module comprises,
the balanced instruction data acquisition module is used for converting the voltage data of the battery cell into balanced instruction data according to the voltage condition;
and the rationality calculation module is used for comparing the equalization instruction with corresponding cell voltage data, and outputting the qualified channel quality when the equalization instruction and the corresponding cell voltage data are completely matched, or else, outputting the unqualified channel quality.
The application has the advantages that: 1. the wireless BMS of the power battery evaluates the channel quality from three aspects, evaluates and judges the stability, the effectiveness and the rationality respectively, and the evaluation mode is very accurate and comprehensive, so that the real situation of accurately judging the current channel quality is ensured, and a very good evaluation means is provided for the use of the wireless BMS of the power battery, so that the wireless BMS of the power battery has great popularization value;
2. the method for evaluating the stability of the channel quality of the wireless BMS of the power battery is carried out based on the communication period, and whether the unstable condition exists in the wireless transmission process or not is judged through the time of the communication period of the signal sent by the wireless BMS slave board to the wireless BMS main board, so that the judging mode is simple and accurate, and the operation is extremely convenient;
3. the stability is judged by collecting a plurality of communication periods, so that the qualification condition of the channel quality is obtained, the occurrence of misjudgment condition is avoided, the final obtained result is ensured to be completely accurate, and the channel quality condition can be truly reflected;
4. the method for evaluating the effectiveness of the channel quality of the wireless BMS of the power battery is carried out based on the equalization instruction array, the wireless BMS main board converts the cell voltage data acquired by the wireless BMS slave board into the equalization instruction array, and whether the data in the current equalization instruction array are effective or not can be accurately judged by judging the range of the equalization instruction data, so that the effectiveness of the equalization instruction array is obtained, the judging mode is simple, and the judging result is extremely accurate;
5. the method for evaluating the rationality of the channel quality of the wireless BMS of the power battery is carried out based on the equalization instruction, the wireless BMS main board converts the cell voltage data acquired by the wireless BMS slave board into the equalization instruction, and the equalization instruction is compared with the cell voltage, so that the qualification of the channel quality can be accurately judged, the judging mode is very simple, and the judging result is very accurate;
6. this application is very simple to the mode that wireless BMS mainboard was converted wireless BMS slave plate collection's electric core voltage data into balanced instruction, can divide into initiative balanced mode and passive balanced mode, and the conversion of whichever mode all can be accurate convenient judges channel quality's qualification, and conversion mode is very simple and convenient.
The method and the device for judging the channel quality of the wireless BMS of the power battery have the advantages that qualification judgment is carried out on the three aspects of stability, effectiveness and rationality of the channel quality of the wireless BMS of the power battery, the channel quality condition of the wireless BMS of the power battery can be accurately judged, the accuracy of wireless BMS information transmission of the power battery is greatly facilitated, and the method and the device for judging the channel quality of the wireless BMS of the power battery have great popularization value.
Drawings
Fig. 1: wireless BMS system schematic diagrams of the present application;
fig. 2: the wireless BMS system channel quality evaluation method is schematically shown in the application.
Detailed Description
Embodiments of the present invention are described in detail below, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
The invention will now be described in further detail with reference to the drawings and to specific examples.
The application relates to a wireless BMS channel quality evaluation method and system of power battery, and the application is mainly to judge the signal transmission between wireless BMS mainboard and the wireless BMS slave plate in the wireless BMS of power battery, evaluate and judge from three aspects of signal transmission's stability, validity and rationality, evaluate the qualification condition of channel quality, avoid wireless BMS's channel quality qualification to appear under the condition of not up to standard transmission problem.
As shown in fig. 1, for the wireless BMS system structure schematic diagram of this application, the wireless BMS system of this application includes a set of wireless BMS mainboard and a plurality of wireless BMS slave plate of group, wireless BMS gathers electric core voltage and the temperature of corresponding module, wireless BMS slave plate passes through wireless transmission's mode with the information of gathering to wireless BMS mainboard, wireless BMS mainboard carries out analysis and calculation according to the electric core voltage data that wireless BMS slave plate sent, judge whether this electric core needs to be balanced, then wireless BMS mainboard starts balanced instruction to wireless BMS slave plate, wireless BMS slave plate regulates and control the voltage of electric core according to the balanced instruction of sending.
Specifically, the evaluation method of the present application is performed according to the following steps, as shown in fig. 2:
s1, after the wireless BMS main board and the wireless BMS slave board are electrified and work, judging the stability of the channel quality of the wireless BMS based on the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board, and judging that the channel quality is unqualified if the stability is unqualified;
for judging the stability of communication, the method is carried out through a communication period, and by comparing the time of the communication period, if the time of the communication period exceeds a set range, the communication between a wireless BMS main board and a wireless BMS slave board is proved to be problematic, and the condition of data missing occurs, so that the current channel quality can be judged to be unqualified;
s2, if the stability meets the standard, judging the qualification of the wireless BMS channel quality based on the effectiveness of the signal sent by the wireless BMS slave board to the wireless BMS main board, and if the effectiveness does not meet the standard, judging that the channel quality is unqualified;
the validity judgment is carried out after the communication stability judgment reaches the standard, namely the validity of the communication is considered only under the condition of stable communication, the validity of the communication is judged by judging the validity of the transmission signals, and if certain transmission signals are false, the qualification of the current channel quality can be judged to be substandard;
s3, if the effectiveness meets the standard, judging the qualification of the wireless BMS channel quality based on the rationality of the signal sent by the wireless BMS slave board to the wireless BMS main board, if the rationality does not meet the standard, judging that the channel quality is unqualified, and if the rationality meets the standard, judging that the channel quality is qualified;
the rationality judgment of the communication is carried out after the validity judgment of the communication reaches the standard, namely the evaluation judgment of the application is to firstly judge the stability of the communication, determine that the current channel transmission data is stable, then carry out the validity evaluation judgment of the communication, determine that the current channel transmission data is valid, finally carry out the rationality evaluation judgment of the communication, and determine that the current channel transmission data is reasonable and carry out the steps in sequence;
the rationality judgment of the communication is based on the rationality of the transmitted signal, and if some signals are unreasonable, the qualification of the current channel quality can be judged to be substandard.
The method and the device evaluate whether the quality qualification of the channel between the wireless BMS slave board and the wireless BMS main board meets the standard or not through evaluating three aspects of stability, effectiveness and rationality of communication, and the follow-up processing process which does not meet the standard is not in the consideration range of the scheme.
In some embodiments of the present application, the step S1 is optimized in this embodiment, and specifically, in the step S1, a method for determining eligibility of channel quality of a wireless BMS based on stability of a signal sent from the wireless BMS slave board to the wireless BMS motherboard includes: and acquiring the time of the communication period of the signal sent by the wireless BMS slave board to the wireless BMS master board, calculating the difference value between the time of each communication period and the design value, judging that the communication period is stable if the ratio of the difference value to the design value is not greater than a set threshold value, and judging that the communication period is unstable if the difference value is not greater than the set threshold value.
Assuming that the design value of the embodiment is 100ms, that is, the communication period set in the embodiment is 100ms, in the actual communication process, the time for collecting three continuous communication periods is 80ms, 95ms and 108ms respectively, the ratio of the three communication periods is calculated according to the above manner to be 20%, 5% and 8%, the set threshold value of the embodiment is 10%, and if the ratio of the first communication period exceeds the set threshold value, the first communication period is judged to be unstable; if the ratio of the second communication period does not exceed the set threshold, judging that the second communication period is stable; and if the ratio of the third communication period does not exceed the set threshold, judging that the third communication period is stable.
In practical application, the design value and the set threshold are selected and set according to practical requirements, and are not limited to the above data.
In order to avoid the situation of misjudgment, in the process of evaluating and judging the communication stability, the time of continuous T communication periods is acquired to judge, if the continuous T communication periods are all unstable, the stability of the channel quality is judged to be unqualified, otherwise, the stability of the channel quality is judged to be qualified, and T is an integer larger than 2 and can be 3, 4 and 5 ….
In other embodiments of the present application, the step S2 is optimized in this embodiment, and specifically, in the step S2, a method for determining eligibility of wireless BMS channel quality based on validity of a signal sent by the wireless BMS slave board to the wireless BMS motherboard includes: the wireless BMS main board receives the battery cell voltage signals sent by the wireless BMS slave board, the wireless BMS main board processes the battery cell voltage signals to form an equalization instruction array, the wireless BMS main board judges the battery cell voltage data after receiving the battery cell voltage data transmitted by the wireless BMS slave board, the battery cell voltage data is actually compared with a set voltage range, if the battery cell voltage is in the set voltage range, the battery cell is judged to be not required to be equalized, the battery cell can be marked as 1, when the battery cell voltage data exceeds the set voltage range, the battery cell is judged to be required to be equalized, the battery cell can be marked as 0, after each battery cell is marked, the equalization instruction array can be finally formed, the equalization instruction array is an n-dimensional array, and n represents the number of the battery cells in the module corresponding to the wireless BMS slave board.
After the balance instruction array is obtained, the data of the balance instruction array are analyzed, if NULL value NULL appears in the balance instruction array, or the value is not 0 or 1 when the NULL value exceeds the effective range, or the dimension of the balance instruction array is unequal to the number of the cell voltages acquired by the wireless BMS slave board, the balance instruction array is judged to have invalid value, otherwise, the balance instruction array is judged to have no invalid value, and the balance instruction array is effective.
The NULL value NULL, or the value which is beyond the effective range, namely is not 0 or 1, or the dimension of the equalization instruction array is not equal to the number of the cell voltages acquired by the wireless BMS slave board, and the situations are not generated under the normal communication condition, so that the effectiveness of the current communication can be judged to be up to standard as long as the situations are eliminated.
In a further embodiment of the present application, the step S3 is optimized, and specifically, in the step S3, a method for determining eligibility of channel quality of the wireless BMS based on reasonability of signals sent from the wireless BMS slave board to the wireless BMS motherboard includes: the wireless BMS main board converts the battery cell voltage data sent by the wireless BMS slave board into an equalization instruction according to the voltage condition, and two modes of converting the battery cell voltage data into the equalization instruction are adopted, wherein one mode is active equalization, and the other mode is passive equalization;
the active equalization refers to that a high-voltage cell in the same module transmits electric energy to a low-voltage cell so as to achieve the purpose of mutual equalization, in an active equalization mode, an equalization instruction of a cell with the cell voltage being out of a set voltage range is set as 1, and an equalization instruction of a cell with the cell voltage being in the set voltage range is set as 0;
the passive equalization refers to that other battery cells are discharged from a battery cell with high voltage in the same module without changing, so that the purpose of equalization is achieved, in a passive equalization mode, an equalization instruction of a battery cell with the voltage of the battery cell exceeding the upper limit of the set voltage range is set as 1, and an equalization instruction of a battery cell with the voltage of the battery cell not exceeding the upper limit of the set voltage range is set as 0;
after the wireless BMS main board obtains corresponding balanced instruction, the wireless BMS main board can send the balanced instruction to the wireless BMS slave board, the wireless BMS slave board receives the balanced instruction and compares the balanced instruction with the acquired battery cell voltage data corresponding to the balanced instruction, if the balanced instruction is matched with the corresponding battery cell voltage data (namely meets the setting requirement of the active balanced or passive balanced), the balanced instruction is judged to be reasonable, if the balanced instruction is not matched, the balanced instruction is judged to be unreasonable, and if the unmatched balanced instruction appears in the same module, the channel quality corresponding to the module is judged to be unqualified.
The matching refers to that the balanced instruction data accords with the voltage condition of the battery cells, for example, the balanced instruction data obtained by the wireless BMS mainboard is 1, and in an active mode, the voltage of the corresponding battery cells collected by the wireless BMS slave board is in a set voltage range, and the balanced instruction data is not matched with the voltage of the battery cells; for example, in the passive equalization mode, the equalization instruction data obtained by the wireless BMS main board is 1, the voltage acquired by the wireless BMS slave board to the corresponding battery cell is in the set voltage range, and the equalization instruction data is not matched with the voltage of the battery cell. Mismatch indicates that a problem arises in data interaction between the wireless BMS motherboard and the wireless BMS slave board, so that it can be determined that the channel quality is unacceptable.
For example, the voltage that wireless BMS slave plate gathered 1# electric core monomer has exceeded the voltage range of setting for, wireless BMS slave plate sends this electric core monomer's voltage data to wireless BMS mainboard, wireless BMS mainboard is given 1# electric core monomer's balanced instruction according to the decision mode of initiative balanced, then wireless BMS mainboard sends balanced instruction to wireless BMS slave plate, wireless BMS slave plate receives 1# electric core monomer's balanced instruction after, can compare this balanced instruction and 1# electric core monomer's voltage data, if find that 1# electric core monomer's voltage data has indeed exceeded the voltage range of setting for, then judge balanced instruction and voltage data and be assorted, otherwise be the mismatch.
In addition, the application also provides a wireless BMS channel quality evaluation system of the power battery, which comprises a stability judgment module, a validity judgment module and a rationality judgment module, wherein the stability judgment module is used for judging the qualification of the wireless BMS channel quality according to the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board; the validity judging module is used for judging the qualification of the wireless BMS channel quality according to the validity of the signal sent by the wireless BMS slave board to the wireless BMS main board under the condition that the channel quality is stable; the rationality judging module is used for judging the qualification of the wireless BMS channel quality according to the rationality that the wireless BMS slave board sends signals to the wireless BMS main board under the condition that the channel quality is effective.
The stability judging module comprises a communication cycle time acquisition module, a time comparison module and a stability calculation module, wherein the communication cycle time acquisition module is used for acquiring the time of a communication cycle of a signal sent by the wireless BMS slave board to the wireless BMS main board; the time comparison module calculates the ratio of the difference value of the acquired communication cycle time and the design value to the design value; the stability calculation module compares the ratio with a set threshold, and when the ratio is not larger than the set threshold, the output channel quality qualification meets the standard, and when the ratio is larger than the set threshold, the output channel quality qualification does not meet the standard.
The validity judging module comprises an equalization instruction array acquisition module and a validity calculating module, wherein the equalization instruction array acquisition module is used for converting a cell voltage signal into an equalization instruction array in a mode of 0 when the cell needs equalization and 1 when the cell does not need equalization; the effectiveness calculation module outputs the qualified channel quality to reach the standard when NULL value NULL appears in the equalization instruction array, or the number is not 0 or 1 when the number of dimensions of the equalization instruction array is not equal to the number of the cell voltages acquired by the wireless BMS slave board, or the qualified channel quality is not reached.
The rationality judging module comprises an equalization instruction data acquisition module and a rationality calculating module, wherein the equalization instruction data acquisition module is used for converting the voltage data of the battery cell into equalization instruction data according to the voltage condition; the rationality calculation module is used for comparing the equalization instruction with corresponding cell voltage data, and outputting the qualified channel quality when the equalization instruction and the corresponding cell voltage data are completely matched, otherwise, outputting the qualified channel quality when the equalization instruction and the corresponding cell voltage data are not qualified.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A wireless BMS channel quality evaluation method of a power battery is characterized in that: the method comprises the following steps of:
s1, after the wireless BMS main board and the wireless BMS slave board are electrified and work, judging the qualification of the wireless BMS channel quality based on the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board, and judging that the channel quality is unqualified if the stability is unqualified;
s2, if the stability meets the standard, judging the qualification of the wireless BMS channel quality based on the effectiveness of the signal sent by the wireless BMS slave board to the wireless BMS main board, and if the effectiveness does not meet the standard, judging that the channel quality is unqualified;
s3, if the effectiveness meets the standard, judging the qualification of the wireless BMS channel quality based on the rationality of the signal sent by the wireless BMS slave board to the wireless BMS main board, if the rationality does not meet the standard, judging that the channel quality is unqualified, and if the rationality meets the standard, judging that the channel quality is qualified;
in step S1, the method for determining the stability of the wireless BMS channel quality based on the stability of the wireless BMS slave board transmitting a signal to the wireless BMS motherboard includes: collecting the time of a communication period of a signal sent by a wireless BMS slave board to a wireless BMS main board, calculating the difference value of the time of each communication period and a design value, judging that the communication period is stable if the ratio of the difference value to the design value is not greater than a set threshold value, and judging that the communication period is unstable if the difference value is not greater than the set threshold value;
in the step S2, the method for judging the qualification of the wireless BMS channel quality based on the validity of the signal sent by the wireless BMS slave board to the wireless BMS motherboard includes: the wireless BMS main board receives the cell voltage signals sent by the wireless BMS slave board, the wireless BMS main board processes the cell voltage signals to form an equalization instruction array, the equalization instruction array is an array which is 0 when the cell needs equalization and is 1 when the cell does not need equalization, if NULL value NULL occurs in the equalization instruction array, or the number which is not 0 or 1 when the cell exceeds an effective range, or the dimension of the equalization instruction array is unequal to the number of the cell voltages acquired by the wireless BMS slave board, the equalization instruction array is judged to have an invalid value, otherwise, the equalization instruction array is judged to have no invalid value, and the equalization instruction array is valid;
in step S3, the method for judging the qualification of the wireless BMS channel quality based on the rationality of the wireless BMS slave board transmitting the signal to the wireless BMS motherboard includes: the wireless BMS mainboard converts the cell voltage data sent by the wireless BMS slave board into balanced instruction data according to the voltage condition, the wireless BMS slave board compares the balanced instruction with the corresponding cell voltage data after receiving the balanced instruction sent by the wireless BMS mainboard, if the two are completely matched, the balanced instruction is judged to be reasonable, otherwise, the balanced instruction is unreasonable.
2. The power battery wireless BMS channel quality evaluation method of claim 1, wherein: in the step S1, if all of the continuous T communication periods are unstable, determining that the channel quality is not qualified, otherwise, determining that the channel quality is qualified; and T is an integer greater than 2.
3. The power battery wireless BMS channel quality evaluation method of claim 1, wherein: the method for converting the cell voltage data sent by the wireless BMS slave board into the equalization instruction by the wireless BMS master board according to the voltage condition comprises the following steps:
setting the balance instruction of the battery cell with the battery cell voltage outside the set voltage range as 1, and setting the balance instruction of the battery cell with the battery cell voltage within the set voltage range as 0;
alternatively, the cell balancing command for the cell whose cell voltage exceeds the upper limit of the set voltage range is set to 1, and the cell balancing command for the cell whose cell voltage does not exceed the upper limit of the set voltage range is set to 0.
4. The utility model provides a wireless BMS channel quality evaluation system of power battery which characterized in that: the evaluation system adopts the wireless BMS channel quality evaluation method of the power battery according to any one of claims 1-3, comprising,
the stability judging module is used for judging the qualification of the wireless BMS channel quality according to the stability of the signal sent by the wireless BMS slave board to the wireless BMS main board;
the validity judging module is used for judging the qualification of the wireless BMS channel quality according to the validity of the signal sent by the wireless BMS slave board to the wireless BMS main board under the condition that the signal sending is stable;
the rationality judging module is used for judging the qualification of the wireless BMS channel quality according to the rationality of the wireless BMS slave board sending signals to the wireless BMS main board under the condition that the sending signals are effective;
the stability judging module comprises a module for judging the stability of the vehicle,
the communication cycle time acquisition module is used for acquiring the time of a communication cycle of a signal sent by the wireless BMS slave board to the wireless BMS main board;
the time comparison module calculates the ratio of the difference value of the acquired communication cycle time and the design value to the design value;
the stability calculation module compares the ratio with a set threshold, and outputs qualified channel quality when the ratio is not more than the set threshold, and when the ratio is not more than the set threshold, the qualified channel quality is not up to the standard;
the validity judgment module comprises a data processing module and a validity judgment module,
the balanced instruction array acquisition module is used for converting the voltage signals of the battery cells into balanced instruction arrays in a mode of 0 when the battery cells need to be balanced and 1 when the battery cells do not need to be balanced;
the effectiveness calculation module is used for outputting qualified channel quality to reach the standard when NULL value NULL appears in the equalization instruction array, or the value is beyond the effective range, namely is not 0 or 1, or the dimension of the equalization instruction array is unequal to the number of the cell voltages acquired by the wireless BMS slave board, otherwise, the qualified channel quality is not up to the standard;
the rationality judgment module comprises a logic module and a logic module,
the balanced instruction data acquisition module is used for converting the voltage data of the battery cell into balanced instruction data according to the voltage condition;
and the rationality calculation module is used for comparing the equalization instruction with corresponding cell voltage data, and outputting the qualified channel quality when the equalization instruction and the corresponding cell voltage data are completely matched, or else, outputting the unqualified channel quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311178872.2A CN116916374B (en) | 2023-09-13 | 2023-09-13 | Wireless BMS channel quality evaluation method and system for power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311178872.2A CN116916374B (en) | 2023-09-13 | 2023-09-13 | Wireless BMS channel quality evaluation method and system for power battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116916374A CN116916374A (en) | 2023-10-20 |
| CN116916374B true CN116916374B (en) | 2024-01-26 |
Family
ID=88358797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311178872.2A Active CN116916374B (en) | 2023-09-13 | 2023-09-13 | Wireless BMS channel quality evaluation method and system for power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116916374B (en) |
Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199479A (en) * | 2016-07-18 | 2016-12-07 | 北京长城华冠汽车科技股份有限公司 | Battery module of electric vehicle BMS accuracy of detection calibrating installation and method |
| WO2019042362A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
| CN109484244A (en) * | 2018-10-16 | 2019-03-19 | 北京航空航天大学 | Battery management system and electric car |
| CN109995102A (en) * | 2019-03-01 | 2019-07-09 | 中国第一汽车股份有限公司 | A kind of equal balance system of Prospect of EVS Powered with Batteries and control method |
| CN111002870A (en) * | 2019-12-19 | 2020-04-14 | 中山华野新能源有限公司 | Active balance control method of new energy vehicle BMS system |
| CN111880109A (en) * | 2020-05-29 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method and system for testing passive equalization function of battery management system of electric vehicle |
| KR20200129717A (en) * | 2019-05-09 | 2020-11-18 | 주식회사 엘지화학 | System for automatically assignign id to slave bms |
| WO2020244588A1 (en) * | 2019-06-05 | 2020-12-10 | 深圳市道通智能航空技术有限公司 | Battery management system, battery management method, power source module, and unmanned aerial vehicle |
| CN112162785A (en) * | 2020-09-30 | 2021-01-01 | 蜂巢能源科技有限公司 | BMS slave board dormancy control method and BMS |
| CN112327184A (en) * | 2020-10-14 | 2021-02-05 | 江苏纵帆微电子有限公司 | Battery pack data transmission system and transmission method thereof |
| CN112737010A (en) * | 2020-12-15 | 2021-04-30 | 杭州高特电子设备股份有限公司 | Lithium ion power battery equalization effect evaluation system and method thereof |
| CN113386620A (en) * | 2021-06-03 | 2021-09-14 | 合肥国盛电池科技有限公司 | BMS intelligence battery management control system suitable for new forms of energy car |
| CN113625167A (en) * | 2020-05-08 | 2021-11-09 | 郑州宇通集团有限公司 | Method for evaluating equalization effect of battery management system |
| CN113884785A (en) * | 2021-08-31 | 2022-01-04 | 深圳市科信通信技术股份有限公司 | Battery management system test method and storage medium |
| CN114114057A (en) * | 2021-10-28 | 2022-03-01 | 合肥国轩高科动力能源有限公司 | New energy electric vehicle battery monomer abnormity prediction method |
| CN114211961A (en) * | 2020-09-18 | 2022-03-22 | 长城汽车股份有限公司 | Thermal runaway protection method and protection system for power battery pack |
| CN114371435A (en) * | 2022-01-17 | 2022-04-19 | 北京西清能源科技有限公司 | BMS sensor effectiveness evaluation method, system, electronic device and medium |
| CN114379419A (en) * | 2021-12-08 | 2022-04-22 | 北京新能源汽车股份有限公司 | Electric automobile and power battery balancing method thereof, battery management system and medium |
| CN114859240A (en) * | 2022-07-05 | 2022-08-05 | 江西信息应用职业技术学院 | Battery pack leakage diagnosis method, system, electronic device and storage medium |
| CN115309679A (en) * | 2022-08-02 | 2022-11-08 | 中航锂电（洛阳）有限公司 | BMS slave control address allocation method, BMS master control module and BMS slave control module |
| WO2023024851A1 (en) * | 2021-08-23 | 2023-03-02 | 深圳市道通科技股份有限公司 | Battery equalization method and system |
| CN115972985A (en) * | 2023-01-29 | 2023-04-18 | 浙江极氪智能科技有限公司 | Battery pack balancing method and device, vehicle and storage medium |
| CN116039380A (en) * | 2022-12-08 | 2023-05-02 | 安徽国轩象铝科技有限公司 | Battery pack information acquisition system based on terminal control |
| CN116047307A (en) * | 2023-01-12 | 2023-05-02 | 威胜信息技术股份有限公司 | Method and device for monitoring performance of power battery pack of electric automobile |
| CN116068437A (en) * | 2021-11-02 | 2023-05-05 | 郑州深澜动力科技有限公司 | BMS thermal management and SOX test method |
| WO2023077270A1 (en) * | 2021-11-02 | 2023-05-11 | 宁德时代新能源科技股份有限公司 | Battery cell capacity equalization method, battery management system and storage medium |
| CN116400221A (en) * | 2023-04-17 | 2023-07-07 | 江苏正力新能电池技术有限公司 | Method for testing safety function of battery management system |
| CN116691445A (en) * | 2023-06-21 | 2023-09-05 | 重庆赣锋动力科技有限公司 | Battery equalization control method under main control dormant state of battery management system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080132173A1 (en) * | 2006-11-30 | 2008-06-05 | Korea Advanced Institute Of Science And Technology | Channel estimation apparatus and channel estimation method |
| KR102204301B1 (en) * | 2017-07-20 | 2021-01-15 | 주식회사 엘지화학 | Wireless battery manamement system and a battery pack including the same |
| CN109435769B (en) * | 2017-08-31 | 2021-05-14 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
| US11863477B2 (en) * | 2019-10-04 | 2024-01-02 | Intel Corporation | Radio link monitoring (RLM) evaluation periods in new radio-unlicensed (NR-U) spectrums and reference signal time difference timing uncertainty configuration |
| EP4064749B1 (en) * | 2020-01-03 | 2023-10-25 | Huawei Technologies Co., Ltd. | Method and apparatus for determining evaluation duration during downlink transmission quality inspection |
| WO2021173378A1 (en) * | 2020-02-28 | 2021-09-02 | Sensata Technologies Inc. | Accelerated error testing for wireless battery management systems |
-
2023
- 2023-09-13 CN CN202311178872.2A patent/CN116916374B/en active Active
Patent Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199479A (en) * | 2016-07-18 | 2016-12-07 | 北京长城华冠汽车科技股份有限公司 | Battery module of electric vehicle BMS accuracy of detection calibrating installation and method |
| WO2019042362A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
| CN109484244A (en) * | 2018-10-16 | 2019-03-19 | 北京航空航天大学 | Battery management system and electric car |
| CN109995102A (en) * | 2019-03-01 | 2019-07-09 | 中国第一汽车股份有限公司 | A kind of equal balance system of Prospect of EVS Powered with Batteries and control method |
| KR20200129717A (en) * | 2019-05-09 | 2020-11-18 | 주식회사 엘지화학 | System for automatically assignign id to slave bms |
| WO2020244588A1 (en) * | 2019-06-05 | 2020-12-10 | 深圳市道通智能航空技术有限公司 | Battery management system, battery management method, power source module, and unmanned aerial vehicle |
| CN111002870A (en) * | 2019-12-19 | 2020-04-14 | 中山华野新能源有限公司 | Active balance control method of new energy vehicle BMS system |
| CN113625167A (en) * | 2020-05-08 | 2021-11-09 | 郑州宇通集团有限公司 | Method for evaluating equalization effect of battery management system |
| CN111880109A (en) * | 2020-05-29 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method and system for testing passive equalization function of battery management system of electric vehicle |
| CN114211961A (en) * | 2020-09-18 | 2022-03-22 | 长城汽车股份有限公司 | Thermal runaway protection method and protection system for power battery pack |
| CN112162785A (en) * | 2020-09-30 | 2021-01-01 | 蜂巢能源科技有限公司 | BMS slave board dormancy control method and BMS |
| CN112327184A (en) * | 2020-10-14 | 2021-02-05 | 江苏纵帆微电子有限公司 | Battery pack data transmission system and transmission method thereof |
| CN112737010A (en) * | 2020-12-15 | 2021-04-30 | 杭州高特电子设备股份有限公司 | Lithium ion power battery equalization effect evaluation system and method thereof |
| CN113386620A (en) * | 2021-06-03 | 2021-09-14 | 合肥国盛电池科技有限公司 | BMS intelligence battery management control system suitable for new forms of energy car |
| WO2023024851A1 (en) * | 2021-08-23 | 2023-03-02 | 深圳市道通科技股份有限公司 | Battery equalization method and system |
| CN113884785A (en) * | 2021-08-31 | 2022-01-04 | 深圳市科信通信技术股份有限公司 | Battery management system test method and storage medium |
| CN114114057A (en) * | 2021-10-28 | 2022-03-01 | 合肥国轩高科动力能源有限公司 | New energy electric vehicle battery monomer abnormity prediction method |
| CN116068437A (en) * | 2021-11-02 | 2023-05-05 | 郑州深澜动力科技有限公司 | BMS thermal management and SOX test method |
| WO2023077270A1 (en) * | 2021-11-02 | 2023-05-11 | 宁德时代新能源科技股份有限公司 | Battery cell capacity equalization method, battery management system and storage medium |
| CN114379419A (en) * | 2021-12-08 | 2022-04-22 | 北京新能源汽车股份有限公司 | Electric automobile and power battery balancing method thereof, battery management system and medium |
| CN114371435A (en) * | 2022-01-17 | 2022-04-19 | 北京西清能源科技有限公司 | BMS sensor effectiveness evaluation method, system, electronic device and medium |
| CN114859240A (en) * | 2022-07-05 | 2022-08-05 | 江西信息应用职业技术学院 | Battery pack leakage diagnosis method, system, electronic device and storage medium |
| CN115309679A (en) * | 2022-08-02 | 2022-11-08 | 中航锂电（洛阳）有限公司 | BMS slave control address allocation method, BMS master control module and BMS slave control module |
| CN116039380A (en) * | 2022-12-08 | 2023-05-02 | 安徽国轩象铝科技有限公司 | Battery pack information acquisition system based on terminal control |
| CN116047307A (en) * | 2023-01-12 | 2023-05-02 | 威胜信息技术股份有限公司 | Method and device for monitoring performance of power battery pack of electric automobile |
| CN115972985A (en) * | 2023-01-29 | 2023-04-18 | 浙江极氪智能科技有限公司 | Battery pack balancing method and device, vehicle and storage medium |
| CN116400221A (en) * | 2023-04-17 | 2023-07-07 | 江苏正力新能电池技术有限公司 | Method for testing safety function of battery management system |
| CN116691445A (en) * | 2023-06-21 | 2023-09-05 | 重庆赣锋动力科技有限公司 | Battery equalization control method under main control dormant state of battery management system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116916374A (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101692583A (en) | Battery management system for pure electric bus | |
| CN112331941A (en) | Cloud auxiliary battery management system and method | |
| CN210051820U (en) | Insulation detection device and battery management system | |
| CN103094633A (en) | Detecting and maintaining system applied to electromobile power battery | |
| CN112186275A (en) | BMS system based on high in clouds | |
| CN112345955B (en) | Multi-fault online diagnosis method and system for power battery | |
| CN110931899B (en) | Fault diagnosis and failure processing system and method for lithium ion power battery pack | |
| CN107800172A (en) | A kind of data collecting system of batteries of electric automobile module | |
| CN101615809A (en) | A kind of single battery control system of vehicular power supply | |
| US20230384392A1 (en) | Method for detecting abnormal condition or fault of battery, and a battery management system operating the same | |
| CN105437995A (en) | Module intelligent detecting and identifying method and multi-way checking fault-tolerant communication method | |
| CN114778976A (en) | Battery charging and discharging equipment precision and line sequence calibration tool system | |
| CN215071703U (en) | Distributed battery energy storage system | |
| CN116916374B (en) | Wireless BMS channel quality evaluation method and system for power battery | |
| CN109585948B (en) | Distributed detection system and method for automobile lithium battery cell and measurement module | |
| CN103171451A (en) | Battery management system based on co-processor and solid-state relay | |
| CN105044440A (en) | Fuel cell monolithic voltage inspection system based on LTC6803 | |
| CN111175667A (en) | Battery test system | |
| CN203218952U (en) | Electric automobile cell management system | |
| CN207199787U (en) | A kind of automobile high in the clouds battery management system based on wireless telecommunications battery core | |
| CN207000210U (en) | A kind of subsidiary secondary failure diagnosis and the lithium battery module acquisition system for the treatment of mechanism | |
| CN109818092A (en) | A kind of novel battery system | |
| CN214124859U (en) | Battery management system for lithium battery | |
| CN213875956U (en) | Modular expanding type single-chip voltage inspection device for hydrogen-oxygen fuel cell | |
| CN204945219U (en) | A kind of single voltage detecting system for feul cells based on LTC6803 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |