CN111830337A - Electric leakage detection method and electric leakage detection system - Google Patents
Electric leakage detection method and electric leakage detection system Download PDFInfo
- Publication number
- CN111830337A CN111830337A CN202010490516.4A CN202010490516A CN111830337A CN 111830337 A CN111830337 A CN 111830337A CN 202010490516 A CN202010490516 A CN 202010490516A CN 111830337 A CN111830337 A CN 111830337A
- Authority
- CN
- China
- Prior art keywords
- current
- sum
- leakage
- electric
- leakage detection
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
- G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers
-
- 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
- G01R19/16571—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 AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a leakage detection method, which comprises the following steps: s1, counting deviation values related to current measurement accuracy in the electrical system; s2, calculating the sum of the actually measured currents of all branches in the electrical system; and S3, comparing the sum of the currents with the deviation value, if the sum of the currents is larger than the deviation value, judging that the electric system has an electric leakage phenomenon, and if not, judging that the electric system is normal. The invention has the advantages that the parts in the electric system can be effectively protected from being damaged, and the personal safety is not threatened, thereby improving the safety of the whole vehicle.
Description
Technical Field
The invention relates to the field of automobile control, in particular to an electric leakage detection method and an electric leakage detection system.
Background
In the automobile industry, a micro hybrid power system is a relatively new power system, and is different from a traditional power system in that a 48V motor is added. The 48V motor provides power for the whole vehicle when the engine is started, stopped and assisted by acceleration; the engine is used as a generator to charge the 48V battery pack when the engine rotates normally; the power can be recovered during the engine braking process and converted into electric energy to be stored in a 48V battery pack.
The current 48V micro-hybrid power system mainly comprises a 48V motor, a 48V battery pack, a DC/DC module, a 48V load and other components. Since these components are dispersed in various positions of the entire vehicle, some are in the engine front compartment, some are under the cabin seat, and some are in the trunk, the components need to be connected by a wire harness. Over time, long-term operation of the vehicle in various environments will likely result in a phenomenon in which the insulation layer of the wire harness deteriorates. And the deterioration of the insulation layer of the wiring harness will cause the occurrence of electric leakage.
On the one hand, it is known that 48V dc is a critical safe voltage and is easily damaged.
On the other hand, when the 48V electrical network has a leakage phenomenon, the leakage current may cause a short circuit to ground, causing damage to components.
In addition, the nature of the leakage is also energy loss, that is, the energy recovery and boosting effects of the 48V electrical system are greatly reduced, and if the effect is serious, the 48V battery may be lack of power, so that the electric energy management of the whole vehicle is affected, and the energy among all the components in the system cannot reach balance.
Disclosure of Invention
In order to solve the problems, the leakage detection needs to be carried out on the 48V electrical system, so that the influence on the 48V electrical system and personal safety is reduced, and safer and more reliable driving experience is brought to passengers.
The electric leakage detection method is used for detecting the electric leakage condition of an electric system and comprises the following steps:
s1, counting deviation values related to current measurement accuracy in the electrical system;
s2, calculating the sum of the actually measured currents of all branches in the electrical system;
and S3, comparing the sum of the currents with the deviation value, if the sum of the currents is larger than the deviation value, judging that the electric system has an electric leakage phenomenon, and if not, judging that the electric system is normal.
In the above-described leakage detection method, after it is determined that there is a leakage phenomenon, the power supply of the electrical system is interrupted and an alarm is issued.
In the above leakage detection method, the accuracy of any branch current is the product of the measured value of the branch current and the measurement accuracy of the measured value.
In the above-described leakage detection method, in step S1, the accuracy deviation is a square root of a sum of squares of the accuracies of the respective branch currents.
In the above-mentioned leakage detecting method, in step S2, the current flowing out of the power source terminal is set to be a positive value, and the currents of the other branches are set to be negative values.
In the above leakage detection method, in step S3, if the duration that the absolute value of the sum of the currents is greater than the deviation value is greater than or equal to the preset time t, it is determined that there is a leakage phenomenon in the electrical system.
In the above-described leakage detection method, the steps are performed after the electrical system enters a stable operating state.
In the leakage detection method, each branch is provided with a current sensor, and current data of each branch acquired by the current sensors is uploaded through a bus.
Another objective of the present invention is to provide an electrical leakage detecting system, which detects whether there is electrical leakage in the electrical system in real time according to any of the above electrical leakage detecting methods.
The leakage detecting system includes:
the electronic control unit is used for receiving the current data of each branch circuit and judging whether the electric leakage phenomenon exists or not;
a battery management system for providing output current data of the battery;
the power-assisted recovery motor is used for providing current data of the power-assisted recovery motor; and a load capable of providing self-current data;
a DC converter providing its own output current value to the electronic control unit through the bus.
According to the technical scheme, the electric leakage condition of the electric system is judged by comparing the precision deviation value with the total current of the closed loop, if the electric leakage phenomenon is judged to occur, the power supply of the electric system is stopped, the continuation of the electric leakage phenomenon is prevented, so that parts in the electric system can be effectively protected from being damaged, the personal safety is not threatened, and the safety of the whole vehicle is ensured. Meanwhile, because the system can also send out an alarm, maintenance personnel can check the electrical system in time so as to reduce the damage of parts caused by electric leakage and avoid unnecessary economic loss.
Drawings
FIG. 1 is a circuit schematic of an embodiment of the present invention;
FIG. 2 is a system framework diagram of an embodiment of the invention.
Detailed Description
In order to make the objects and features of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Also, the embodiments and features of the embodiments in the present application are allowed to be combined with or substituted for each other without conflict. The advantages and features of the present invention will become more apparent in conjunction with the following description.
It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It should also be noted that the numbering of the steps in the present invention is for ease of reference and not for limitation of the order of the steps. Specific language will be used herein to describe the particular sequence of steps which is required.
In micro hybrid power systems, in particular in the automotive field, 48V motors and 48V batteries are currently in the mainstream. The 48V battery provides energy (mainly referring to heavy current) to the 48V motor when the vehicle starts to 48V motor can initiatively output the moment of torsion, helps the engine to improve the rotational speed fast, shortens the start-up time of vehicle, and when the gasoline engine inserts driving system, the transition will be comparatively gentle, avoids the emergence of the condition of vehicle "shake".
Meanwhile, a 12V electrical system is arranged on the vehicle, and the voltage of the 48V battery can be reduced to 12V through the DC/DC module for the 12V system on the vehicle.
However, due to the critical safety of the 48V dc, leakage of electricity once occurs will affect safety of both the human and the vehicle. Therefore, the invention aims to provide a technical scheme which can find the electric leakage in time and provide an alarm in time.
Based on kirchhoff's current law, if the branch current containing the power output device in the closed loop is a positive current and the current of each other electrical device branch is a negative current, the sum of all the branch currents in the closed loop should be 0, that is, in the closed loop:
wherein, IsumRepresenting the absolute value of the sum of all branch currents in the closed loop, InThe current value of each branch is shown, and N is the number of branches.
In fact, however, even under normal circumstances, the sum is typically a number close to 0 due to measurement errors.
On the other hand, from a statistical point of view, since the accuracy of the measured current of each branch is known, the accuracy deviation value of the closed loop can be calculated by a formula. Specifically, the deviation value can be calculated by the following formula 2:
wherein, IoffsetRepresenting said error range calculated from the measurement accuracy, InRepresenting the current value, f, of each branchacnIndicating the measurement accuracy of each branch.
Combine two aspects toSaid sum I, close to 0, caused by measurement errors, is saidsumThe floating range of (A) is a precision deviation value I which can be obtained through statisticsoffsetTo be determined. That is, when the value of the sum significantly exceeds the statistical accuracy deviation value, it can be considered that the leakage phenomenon occurs in the 48V electrical system.
Because the 48V electrical system is not an indispensable part for the running of the vehicle, the 48V electrical system can be commanded to be powered off after the electrical system of the vehicle judges that the 48V electrical system has the electric leakage phenomenon, so that the safety of people and the safety of the vehicle can be protected in time.
As shown in fig. 1, the main consumers in a 48V electrical system are shown and form a closed loop. In the figure, the 48V battery is the power output in the closed loop, and therefore, the current I of the branchmvbNoted as positive values. The remainder, e.g. current I, of the 48V load branchmv_loadMarked as negative, assisting in recovering the current I of the motor branchbrmNeed to be treated differently, when the power-assisted recovery motor works in a power generation mode, the current IbrmMarked as positive, when the power recovery motor is operating in motor mode, current IbrmNoted as negative, current I of the branch of the DC/DC conversion moduledcdcNoted as negative values. According to the theory of kirchhoff's current law, the current sum I of the whole closed circuit shown in fig. 1 can be deduced from formula 1sumThe method comprises the following steps:
Isum＝|Imvb+Imv_load+Ibrm+Idcdc|＝0
in practice, IsumIs a value close to 0.
Let the measurement accuracy of each branch in the figure be fmvb、fmv_load、fbrmAnd fdcdcThen, as can be inferred from equation 2, the accuracy deviation value of the whole closed circuit shown in fig. 1 is:
to obtain the above-mentioned IsumAnd IoffsetAfter a specific value of (b), a comparison is made, if Isum>IoffsetIt is determined that there is a leakage in the closed circuit shown in fig. 1, and it is necessary to interrupt the power supply of the 48V electrical system and give an alarm to the driver and passengers, requiring manual intervention and maintenance.
Further, in order to eliminate the influence of spike noise during the running of the vehicle (since the noise is positive to cause misjudgment), I is subjected tosum>IoffsetIs monitored, i.e. when the system judges Isum>IoffsetThe operations of interrupting power supply and giving an alarm are not immediately executed, but the judgment and the monitoring of I are continuously carried outsum>IoffsetWhether or not it is continuously established. If Isum>IoffsetIs only established once, and the next judgment result is no, the former I can be consideredsum>IoffsetThis is true because of external interference, not true leakage. Specifically, a preset time t can be preset, and when I is judged for the first timesum>IoffsetStarting to time after the completion, and judging I if t time continuessum>IoffsetIf the situation is true, the 48V electrical system is considered to have an electric leakage situation, and manual intervention and maintenance are required.
Further, the above steps are executed after the 48V electric system enters the stable operation state. The stable operating state can be considered as a state in which each controller in the 48V electrical system has completed the initial safety self-checking process and starts sending correct signals.
Fig. 2 is a system block diagram of an electrical leakage detection system, which can be used to implement the electrical leakage detection method. The map includes an Electronic Control Unit (ECU), a Battery Management System (BMS), a Boost Recovery Motor (BRM), a direct current converter (DC/DC), and a load capable of providing current data of the load.
Wherein, the current data among ECU, BMS, BRM, DC/DC and the load are exchanged through the bus.
Specifically, the ECU is a control unit, receives real-time current data provided by the ECU, the BMS, the BRM, the DC/DC and the load, and performs control according to the real-time current dataFormula (1) and formula (2) calculate IsumAnd IoffsetAnd then an alarm is given in time according to the comparison result. Wherein, the load is the direct load of 48V electrical system, the DC/DC convert 48V voltage into 12V voltage, for the 12V electrical system on the car to use. Specifically, the form of the alarm includes lighting a malfunction light on a center console in the vehicle and an audible alarm.
After the ECU gives an alarm and cuts off the power supply of the 48V electrical system, because the battery of the 12V electrical system still holds the electric quantity, after the 48V electrical system is powered off, the work of the 12V electrical system (the power utilization of each electronic control device in the vehicle) is not influenced temporarily, namely the operation of the vehicle is not influenced temporarily, and the vehicle is enough to be parked safely.
The leakage detection method and the leakage detection system ensure the safety of the on-vehicle 48V electrical system, reduce unnecessary energy loss, simultaneously play a role in protecting each part in the 48V electrical system, effectively reduce unnecessary cost caused by the damage of each part and improve the driving safety.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A leakage detection method is used for detecting the leakage condition of an electrical system and is characterized by comprising the following steps:
s1, counting deviation values related to current measurement accuracy in the electrical system;
s2, calculating the sum of the actually measured currents of all branches in the electrical system;
and S3, comparing the sum of the currents with the deviation value, if the sum of the currents is larger than the deviation value, judging that the electric system has an electric leakage phenomenon, and if not, judging that the electric system is normal.
2. The electrical leakage detection method according to claim 1, wherein after the electrical leakage phenomenon is determined, the power supply of the electrical system is interrupted and an alarm is issued.
3. A leakage detecting method according to claim 1, wherein the accuracy of any branch current is the product of the measured value of the branch current and the measurement accuracy of the measured value.
4. A leakage detecting method according to claim 3, wherein in step S1, said precision deviation value is a square root of a sum of squares of said precision of each branch current.
5. A leakage detecting method according to claim 1, wherein in step S2, the current flowing out of the power source terminal is a positive value, and the current of each of the other branches is a negative value.
6. The method as claimed in claim 1, wherein in step S3, if the duration that the absolute value of the sum of the currents is greater than the deviation value is greater than or equal to a predetermined time t, it is determined that there is a leakage phenomenon in the electrical system.
7. A leakage detection method according to claim 1, wherein said steps are performed after said electrical system enters a steady operation state.
8. An electric leakage detecting method according to claim 1, wherein each branch is provided with a current sensor, and each branch current data collected by the current sensor is uploaded through the bus.
9. An electric leakage detection system, characterized in that the electric leakage detection method according to any one of claims 1-8 detects whether an electric leakage phenomenon exists in the electric system in real time.
10. An electrical leakage detection system according to claim 9, comprising:
the electronic control unit is used for receiving the current data of each branch circuit and judging whether the electric leakage phenomenon exists or not;
a battery management system for providing output current data of the battery;
the power-assisted recovery motor is used for providing current data of the power-assisted recovery motor; and a load capable of providing self-current data;
a DC converter providing its own output current value to the electronic control unit through the bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010490516.4A CN111830337B (en) | 2020-06-02 | 2020-06-02 | Leakage detection method and leakage detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010490516.4A CN111830337B (en) | 2020-06-02 | 2020-06-02 | Leakage detection method and leakage detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111830337A true CN111830337A (en) | 2020-10-27 |
| CN111830337B CN111830337B (en) | 2024-08-02 |
Family
ID=72897545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010490516.4A Active CN111830337B (en) | 2020-06-02 | 2020-06-02 | Leakage detection method and leakage detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111830337B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238169A (en) * | 2021-03-16 | 2021-08-10 | 联合汽车电子有限公司 | Land loss detection method, readable storage medium and vehicle |
| CN116795073A (en) * | 2022-03-21 | 2023-09-22 | 通用汽车环球科技运作有限责任公司 | Enhanced fault isolation and mitigation of parasitic loads using smart energy centers |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010060329A (en) * | 2008-09-01 | 2010-03-18 | Patokkusu Japan Kk | Apparatus and method for measuring leakage current of electrical path and electric instrument |
| US20110156697A1 (en) * | 2009-12-31 | 2011-06-30 | Schneider Electric USA, Inc. | Compact, two stage, zero flux electronically compensated current or voltage transducer employing dual magnetic cores having substantially dissimilar magnetic characteristics |
| KR20130028302A (en) * | 2011-09-09 | 2013-03-19 | 김보경 | On-line power cable insulation monitoring system and methods |
| CN106199315A (en) * | 2016-08-31 | 2016-12-07 | 重庆长安汽车股份有限公司 | The hybrid power vehicle high voltage system leak current fault diagnostic equipment and method |
| CN106771901A (en) * | 2016-11-28 | 2017-05-31 | 东北电力大学 | Based on the DC system insulating monitoring method for determining frequency switching resistance principle |
| WO2018221619A1 (en) * | 2017-05-30 | 2018-12-06 | 株式会社 シーディエヌ | Electricity leakage detecting method |
| CN209313420U (en) * | 2018-12-29 | 2019-08-27 | 苏州新丰综合能源服务有限公司 | A kind of family DC leakage monitoring for protection device |
-
2020
- 2020-06-02 CN CN202010490516.4A patent/CN111830337B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010060329A (en) * | 2008-09-01 | 2010-03-18 | Patokkusu Japan Kk | Apparatus and method for measuring leakage current of electrical path and electric instrument |
| US20110156697A1 (en) * | 2009-12-31 | 2011-06-30 | Schneider Electric USA, Inc. | Compact, two stage, zero flux electronically compensated current or voltage transducer employing dual magnetic cores having substantially dissimilar magnetic characteristics |
| KR20130028302A (en) * | 2011-09-09 | 2013-03-19 | 김보경 | On-line power cable insulation monitoring system and methods |
| CN106199315A (en) * | 2016-08-31 | 2016-12-07 | 重庆长安汽车股份有限公司 | The hybrid power vehicle high voltage system leak current fault diagnostic equipment and method |
| CN106771901A (en) * | 2016-11-28 | 2017-05-31 | 东北电力大学 | Based on the DC system insulating monitoring method for determining frequency switching resistance principle |
| WO2018221619A1 (en) * | 2017-05-30 | 2018-12-06 | 株式会社 シーディエヌ | Electricity leakage detecting method |
| CN209313420U (en) * | 2018-12-29 | 2019-08-27 | 苏州新丰综合能源服务有限公司 | A kind of family DC leakage monitoring for protection device |
Non-Patent Citations (2)
| Title |
|---|
| MA GANG 等: "A novel soft switching bi-directional DC/DC converter", 《2005 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS》, 19 June 2006 (2006-06-19) * |
| 吴友毅: "汽车漏电的检测方法", 《汽车维修与保养》, 1 May 2017 (2017-05-01) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113238169A (en) * | 2021-03-16 | 2021-08-10 | 联合汽车电子有限公司 | Land loss detection method, readable storage medium and vehicle |
| CN113238169B (en) * | 2021-03-16 | 2024-04-16 | 联合汽车电子有限公司 | Method for detecting missing ground, readable storage medium, and vehicle |
| CN116795073A (en) * | 2022-03-21 | 2023-09-22 | 通用汽车环球科技运作有限责任公司 | Enhanced fault isolation and mitigation of parasitic loads using smart energy centers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111830337B (en) | 2024-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9071081B2 (en) | Power source device for vehicle | |
| CN101160686B (en) | Battery pack management method for HEV & EV | |
| EP2472700B1 (en) | Charge control device for vehicle, and electric vehicle provided with same | |
| EP2803128B1 (en) | Pre-charging vehicle bus using parallel battery packs | |
| US9929674B2 (en) | Power supply system for vehicle | |
| CN107428254B (en) | power supply unit for vehicle | |
| US8890488B2 (en) | Power supply apparatus and method of controlling the same | |
| CN104118436B (en) | Security monitoring method for electric vehicle range increase system | |
| US8054083B2 (en) | Method and apparatus for diagnosing a motor control circuit in a hybrid vehicle | |
| US11624783B2 (en) | Battery diagnosis apparatus and vehicle | |
| CN105572540B (en) | Adaptive electric automobile high-voltage safety fault diagnosis early warning positioning monitoring system | |
| CN116476696A (en) | High-voltage architecture new energy automobile system and control method | |
| CN103863126A (en) | Power control apparatus for vehicle battery | |
| CN104802658A (en) | New-energy entire car controller integrated with motor control function and battery main control function | |
| US11603000B2 (en) | Travel control apparatus | |
| Kong et al. | Comprehensive fault diagnosis and fault-tolerant protection of in-vehicle intelligent electric power supply network | |
| US20140062409A1 (en) | Power supply system | |
| WO2018095415A1 (en) | Battery voltage-based battery protection method and device | |
| US20200139832A1 (en) | Motor-driven vehicle | |
| CN108248598A (en) | A kind of hybrid electric vehicle driven by wheel hub Failure Control system and method | |
| CN111830337A (en) | Electric leakage detection method and electric leakage detection system | |
| US11603011B2 (en) | Lithium plating detection and mitigation in electric vehicle batteries | |
| CN105452051B (en) | Method for operating a battery system | |
| CN109491370A (en) | A kind of method of controlling security and system of automatic driving test | |
| CN115649089A (en) | A low-voltage lithium battery device for automobiles and its control method |
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 |