CN113043912A - Full-time battery detection device and system and automobile - Google Patents
Full-time battery detection device and system and automobile Download PDFInfo
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- CN113043912A CN113043912A CN202110365576.8A CN202110365576A CN113043912A CN 113043912 A CN113043912 A CN 113043912A CN 202110365576 A CN202110365576 A CN 202110365576A CN 113043912 A CN113043912 A CN 113043912A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
本发明提供一种电池全时检测装置、系统及汽车，包括相互连接的BMS从板、BMS主板；所述BMS从板的输入端连接车载动力电池，所述BMS从板的输出端连接所述BMS主板的输入端；其中，所述BMS从板用于整车进入休眠状态时，通过电压比较器将各电池模组的温度值与预设的正常温度阈值比较，或将各电池模组的电压值与预设的正常电压阈值比较，获得比较结果；当某一电池模组的温度值或电压值异常时，唤醒所述BMS主板并输出异常信息；所述BMS主板确定是否检测所述车载动力电池的状态，并根据检测结果上传车载动力电池检测数据或输出报警信息。本发明以低成本方案解决了对热失控的直接监测；降低了由于实时监测电池故障或热失控造成整车低压电池馈电的风险。
The present invention provides a battery full-time detection device, system and automobile, including a BMS slave board and a BMS main board connected to each other; the input end of the BMS slave board is connected to a vehicle power battery, and the output end of the BMS slave board is connected to the The input end of the BMS main board; wherein, when the BMS slave board is used for the whole vehicle to enter the sleep state, the temperature value of each battery module is compared with the preset normal temperature threshold through the voltage comparator, or the temperature value of each battery module is compared. The voltage value is compared with a preset normal voltage threshold to obtain a comparison result; when the temperature value or voltage value of a certain battery module is abnormal, wake up the BMS main board and output abnormal information; the BMS main board determines whether to detect the vehicle The status of the power battery, and upload the vehicle power battery test data or output alarm information according to the test results. The invention solves the direct monitoring of thermal runaway with a low-cost solution, and reduces the risk of low-voltage battery feeding of the vehicle caused by real-time monitoring of battery failure or thermal runaway.
Description
Technical Field
The invention relates to the technical field of electric vehicle battery safety, in particular to a full-time battery detection device.
Background
Currently, the detection of battery failure or thermal runaway is mainly achieved through two ways:
firstly, without adding a sensor, on the basis of voltage acquisition, a current sensor and Battery System software of the existing Battery System, a Battery Management System (BMS) monitors signals of voltage, temperature and the like of the Battery System, and compares the change conditions of the voltage and the temperature with an initially set threshold value to judge whether a fault or thermal runaway occurs. The method has the advantages that a certain thermal runaway monitoring effect can be achieved under the condition that a battery system is powered on and works, but in a normal condition, after a whole vehicle is powered off, a Battery Management System (BMS) can be powered off and sleeps, the monitoring on battery faults or thermal runaway cannot be achieved after the BMS sleeps, at the moment, monitoring and early warning cannot be achieved if faults or thermal runaway occur, functions can fail, and requirements cannot be met; the battery system is required to continuously operate after the entire vehicle is put into power sleep, but the continuous operation of the BMS causes two problems: firstly, the electricity consumption of the low-voltage storage battery is high due to the continuous work of the BMS, and the problem of the feed of the storage battery of the whole vehicle can be caused with high probability; and secondly, the service life of the BMS is also shortened by the long-time operation of the BMS.
Secondly, according to the characteristics of thermal runaway, when the thermal runaway occurs, besides the voltage, the current, the temperature and the SOC of the battery system are changed, the gas pressure, the oxygen content, the gas components and the salt spray in the system are also obviously changed. The thermal runaway is directly monitored by adding sensors, such as a gas pressure sensor, an oxygen sensor, a gas sensor, a smoke sensor and the like; if the thermal runaway occurs, the BMS is awakened to confirm and send out an early warning signal through the monitoring and awakening unit. One or more sensors (pressure, oxygen and gas components) are added on the basis of software and hardware of the current battery system, when the thermal runaway is monitored by the one or more sensors (pressure, oxygen and gas components) under the working state of the vehicle, the BMS in the dormant state is awakened, and whether the thermal runaway really occurs is comprehensively judged by combining the change of the voltage, the temperature and the SOC of the battery system by the BMS. However, in general, only when thermal runaway occurs, there is a change in characteristic quantity such as smoke pressure, and its wake-up and detection mainly aim at the thermal runaway event, and cannot detect a failure such as a cell abnormality, and then the cost of a single sensor (pressure, oxygen, gas component) is relatively high.
Disclosure of Invention
The invention aims to provide a full-time battery detection device, which solves the technical problems of high cost for directly monitoring thermal runaway and low-voltage battery feed of a whole vehicle caused by real-time monitoring of battery faults or thermal runaway.
In one aspect, a full-time battery detection device is provided, including: the BMS slave boards and the BMS main boards are connected with each other; the input end of the BMS slave plate is connected with a vehicle-mounted power battery, and the output end of the BMS slave plate is connected with the input end of the BMS main board;
when the BMS slave board is used for enabling the whole vehicle to enter a dormant state, comparing the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or comparing the voltage value of each battery module with a preset normal voltage threshold value to obtain a comparison result; when the comparison result is that the temperature value or the voltage value of a certain battery module is abnormal, awakening the BMS mainboard and outputting abnormal information;
the BMS mainboard is used for determining whether to detect the state of the vehicle-mounted power battery according to the abnormal information and uploading the detection data of the vehicle-mounted power battery or outputting alarm information according to the detection result.
Preferably, an AFE chip is arranged in the BMS slave board, and an input end of the AFE chip is connected with each battery module in the vehicle-mounted power battery and is used for collecting a temperature value and a voltage value of the battery module; the AFE chip compares the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or compares the voltage value of each battery module with a preset normal voltage threshold value, and when the temperature value or the voltage value is not within the range of the preset normal threshold value, an awakening signal is generated.
Preferably, the output end of the AFE chip is connected to the BMS board and configured to output a wake-up signal, a temperature value and a voltage value of each battery module to the BMS board.
Preferably, the input end of the BMS board is connected to the output end of the BMS board for receiving a wake-up signal, and the state of the vehicle-mounted power battery is detected when it is determined that the abnormal information satisfies a preset wake-up condition.
On the other hand, the full-time battery detection system comprises a VCU, a TEL, an ICM, a background terminal and a full-time battery detection device for detecting the vehicle-mounted power battery;
the full-time battery detection device comprises a BMS slave plate and a BMS main plate which are connected with each other; the input end of the BMS slave plate is connected with a vehicle-mounted power battery, and the output end of the BMS slave plate is connected with the input end of the BMS main board; the output end of the BMS mainboard is respectively connected with the VCU, the TEL and the ICM; the TEL output end is connected with the background terminal;
when the BMS slave board is used for enabling the whole vehicle to enter a dormant state, comparing the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or comparing the voltage value of each battery module with a preset normal voltage threshold value to obtain a comparison result; when the comparison result is that the temperature value or the voltage value of a certain battery module is abnormal, awakening the BMS mainboard and outputting abnormal information;
the BMS mainboard is used for determining whether the state of the vehicle-mounted power battery is detected or not according to the abnormal information and uploading vehicle-mounted power battery detection data to the VCU/the TEL/the ICM according to the detection result;
and the TEL is used for uploading the detection data of the vehicle-mounted power battery to the background terminal.
Preferably, an AFE chip is arranged in the BMS slave board, and an input end of the AFE chip is connected with each battery module in the vehicle-mounted power battery and is used for collecting a temperature value and a voltage value of the battery module; the AFE chip compares the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or compares the voltage value of each battery module with a preset normal voltage threshold value, and when the temperature value or the voltage value is not within the range of the preset normal threshold value, an awakening signal is generated; and the output end of the AFE chip is connected with the BMS mainboard and is used for outputting a wake-up signal, a temperature value and a voltage value of each battery module to the BMS mainboard.
Preferably, the input end of the BMS board is connected to the output end of the BMS board for receiving a wake-up signal, and the state of the vehicle-mounted power battery is detected when it is determined that the abnormal information satisfies a preset wake-up condition.
Preferably, the output terminal of the BMS motherboard is connected to the input terminal of the VCU, the TEL input terminal, and the ICM input terminal, respectively;
when the BMS mainboard detects that the vehicle-mounted power battery is in fault, a battery fault state signal and a network management awakening signal are output to the VCU;
when the BMS mainboard detects the thermal runaway of the vehicle-mounted power battery, outputting a thermal runaway fault prompt signal and a network management awakening signal to the TEL and the ICM;
when the BMS mainboard determines to upload the detection data of the vehicle-mounted power battery, the detection data of the vehicle-mounted power battery is uploaded to the background terminal through the TEL.
Preferably, the input end of the background terminal is connected with the output end of the TEL and is used for receiving detection data of the vehicle-mounted power battery; the output end of the background terminal is connected with the mobile terminal and used for outputting a data analysis result and an alarm signal.
In another aspect, an automobile is also provided, and the full-time detection system for the battery is included.
In summary, the embodiment of the invention has the following beneficial effects:
according to the full-time detection device and system for the battery and the automobile, provided by the invention, under the existing battery system structure, direct monitoring on thermal runaway is solved by a low-cost scheme (mainly aiming at improvement of a full-time detection strategy of an existing chip awakening function); when the BMS is in sleep, the BMS mainboard is awakened only when the BMS searches that the battery meets the awakening condition through the voltage comparison method, detection and confirmation are carried out, and the risk of low-voltage battery feed of the whole vehicle caused by real-time monitoring of battery failure or thermal runaway is reduced; and the battery part faults such as overlarge self-discharge of a battery core and the like are effectively determined.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic diagram of a full-time battery detection device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a full-time battery detection system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a full-time battery detection logic according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an embodiment of a full-time battery detection device according to the present invention. In this embodiment, the apparatus comprises: a BMS (Battery Management System) slave board, a BMS (Battery Management System) master board connected to each other; the BMS is connected with the vehicle-mounted power battery 3 from the input end of the plate 1, and the BMS is connected with the input end of the BMS mainboard 2 from the output end of the plate 1;
when the BMS slave board 1 is used for enabling the whole vehicle to enter a dormant state, comparing the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or comparing the voltage value of each battery module with a preset normal voltage threshold value to obtain a comparison result; when the comparison result is that the temperature value or the voltage value of a certain battery module is abnormal, awakening the BMS mainboard 2 and outputting abnormal information; it can be understood that the BMS keeps monitoring and judging when the BMS slave board 1 is in a sleep state, and the BMS master board 2 can be awakened when the temperature and the voltage have abnormal values; the method specifically comprises the steps of collecting the single voltage and the temperature of each battery module in the battery pack, comparing the single voltage and the temperature with a preset normal threshold value through an AFE (automatic edge detection) chip, and judging the validity of a signal, the balance function of a battery and the like.
In a specific embodiment, an AFE (Active Front End) chip is arranged in the BMS slave board 1, and an input End of the AFE chip is connected with each battery module in the vehicle-mounted power battery 3 and used for acquiring a temperature value and a voltage value of the battery module; the AFE chip compares the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or compares the voltage value of each battery module with a preset normal voltage threshold value, and when the temperature value or the voltage value is not within the range of the preset normal threshold value, an awakening signal is generated. The output end of the AFE chip is connected with the BMS mainboard 2 and used for outputting the awakening signal, the temperature value and the voltage value of each battery module to the BMS mainboard 2. It is understood that the BMS detects the respective battery modules of the vehicle-mounted power battery 3 from the board 1 at all times using the AFE chip, and wakes up the BMS board 2 when the presence of an abnormality (the voltage or temperature of the battery out of a normal value range) is detected. Whether the battery pack breaks down or is out of control thermally or not in a running state can be monitored, whether the battery pack breaks down or is out of control thermally or not in a parking dormant state can be monitored in real time, monitoring power consumption is reduced, and the risk of feeding of a low-voltage storage battery of the whole vehicle is reduced.
Specifically, as shown in fig. 3, the AFE chip sets a condition for waking up the BMS motherboard 2 in advance, and when the AFE chip detects that a certain channel satisfies the primary wake-up sub-condition at a certain time (T0), the AFE chip triggers to wake up the BMS motherboard 2(T1) and outputs a wake-up signal to the BMS motherboard 2 by flashing the primary wake-up sub-condition (voltage is less than or equal to a certain value/voltage is greater than or equal to a certain value/temperature sampling fault (a certain fixed value)).
The BMS mainboard 2 is used for determining whether to detect the state of the vehicle-mounted power battery 3 according to the abnormal information and uploading the detection data of the vehicle-mounted power battery 3 or outputting alarm information according to the detection result; as can be understood, the BMS board 2 detects the states of components inside the high voltage power storage battery, including the cell voltage, the module voltage, the total battery voltage, the current, the temperature, the battery insulation, and other parameters; and meanwhile, various operations of the internal components of the high-voltage power storage battery are controlled and coordinated, and when the condition of uploading data is determined to be met, the state data and the inspection data of the battery are uploaded.
In a specific embodiment, the input end of the BMS motherboard 2 is connected to the output end of the BMS slave board 1, and is configured to receive a wake-up signal, and detect the state of the vehicle-mounted power battery 3 when it is determined that the abnormal information satisfies a preset wake-up condition. It can be understood that when the state of the power battery is detected after the BMS motherboard 2 is awakened and it is determined that the data uploading condition is satisfied, the battery data during the failure is uploaded; and uploading data when thermal runaway is detected, sending alarm information to remind a user, and simultaneously informing after-sales personnel.
Specifically, as shown in fig. 3, after the BMS motherboard 2 receives the wake-up signal, it first determines whether the wake-up condition is valid, that is, whether the preset wake-up condition is satisfied, and after determining that the wake-up condition is satisfied (T2), it starts to upload data (status data of each battery module of the vehicle-mounted power battery 3) and performs battery detection (detect whether there is a fault), and performs a second-level sub-condition dynamic flash on the chip of the wake-up channel at a certain time after determining the wake-up condition (T3), and detects that the T4 does not satisfy the total thermal runaway condition (preset), and does not satisfy the second-level wake-up sub-condition (as described later), and then performs a sleep state, that is, it finds that there are no thermal failure and fault conditions after starting detection, and continues to; after a period of time (T5), the secondary wake-up sub-condition (fault) is met at a certain moment, the BMS board 2 continues to wake up (T6), the BMS board 2 detects the T8 after confirming the wake-up condition (T7), data is uploaded in the process, and the total thermal runaway condition (thermal runaway fault) is met at the moment T9 in the period of time, and then the data (thermal runaway data) is uploaded to T10.
More specifically, the secondary wake-up sub-condition is that the voltage is less than or equal to V/the voltage is greater than or equal to V/the temperature is greater than or equal to ℃. The first-level awakening sub-conditions are corresponding, when the first-level awakening sub-conditions determine a condition, the corresponding second-level awakening sub-conditions are required to be generated to start uploading data, and if the corresponding second-level awakening sub-conditions are not generated, the data are only detected not to be uploaded.
Specifically, the correspondence between the primary wake-up sub-condition and the secondary wake-up sub-condition is as follows:
a voltage less than or equal to XV (primary wake-up condition), corresponding to which is a': a voltage less than or equal to XV (secondary wake-up condition);
b: a voltage greater than or equal to XV (primary wake-up condition), corresponding to b' a voltage greater than or equal to XV (secondary wake-up condition);
c: the temperature is greater than or equal to X ℃ (primary awakening condition), and the corresponding temperature is c': the temperature is greater than or equal to X ℃ (secondary awakening condition);
d: temperature sampling fault (X ℃) (primary wake-up condition).
Fig. 2 is a schematic diagram of an embodiment of a full-time battery detection system according to the present invention. In this embodiment, the system includes: the Vehicle-mounted power battery detection system comprises a VCU6(Vehicle Control Unit), a TEL4(TEL4 electronic system, remote communication Module), an ICM5(Instrument Cluster Module), a background terminal 7 and a battery full-time detection device for detecting a Vehicle-mounted power battery 3;
the full-time battery detection device comprises a BMS slave plate 1 and a BMS main plate 2 which are connected with each other; the BMS is connected with the vehicle-mounted power battery 3 from the input end of the plate 1, and the BMS is connected with the input end of the BMS mainboard 2 from the output end of the plate 1; the output end of the BMS mainboard 2 is respectively connected with the VCU6, the TEL4 and the ICM 5; the output end of the TEL4 is connected with the background terminal 7;
when the BMS slave board 1 is used for enabling the whole vehicle to enter a dormant state, comparing the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or comparing the voltage value of each battery module with a preset normal voltage threshold value to obtain a comparison result; when the comparison result is that the temperature value or the voltage value of a certain battery module is abnormal, awakening the BMS mainboard 2 and outputting abnormal information; it can be understood that the BMS keeps monitoring and judging when the BMS slave board 1 is in a sleep state, and the BMS master board 2 can be awakened when the temperature and the voltage have abnormal values; the method specifically comprises the steps of collecting the single voltage and the temperature of each battery module in the battery, comparing the single voltage and the temperature with a preset normal threshold value through an AFE (automatic edge detection) chip, and judging the validity of a signal, the balance function of the battery and the like.
In a specific embodiment, an AFE (Active Front End) chip is arranged in the BMS slave board 1, and an input End of the AFE chip is connected with each battery module in the vehicle-mounted power battery 3 and used for acquiring a temperature value and a voltage value of the battery module; the AFE chip compares the temperature value of each battery module with a preset normal temperature threshold value through a voltage comparator, or compares the voltage value of each battery module with a preset normal voltage threshold value, and when the temperature value or the voltage value is not within the range of the preset normal threshold value, an awakening signal is generated. The output end of the AFE chip is connected with the BMS mainboard 2 and used for outputting the awakening signal, the temperature value and the voltage value of each battery module to the BMS mainboard 2. It is understood that the BMS detects the respective battery modules of the vehicle-mounted power battery 3 from the board 1 at all times using the AFE chip, and wakes up the BMS board 2 when the presence of an abnormality (the voltage or temperature of the battery out of a normal value range) is detected. Whether the battery pack breaks down or is out of control thermally or not in a running state can be monitored, whether the battery pack breaks down or is out of control thermally or not in a parking dormant state can be monitored in real time, monitoring power consumption is reduced, and the risk of feeding of a low-voltage storage battery of the whole vehicle is reduced.
Specifically, as shown in fig. 3, the AFE chip sets a condition for waking up the BMS motherboard 2 in advance, and when the AFE chip detects that a certain channel satisfies the primary wake-up sub-condition at a certain time (T0), the AFE chip triggers to wake up the BMS motherboard 2(T1) and outputs a wake-up signal to the BMS motherboard 2 by flashing the primary wake-up sub-condition (voltage is less than or equal to a certain value/voltage is greater than or equal to a certain value/temperature sampling fault (a certain fixed value)).
The BMS mainboard 2 is used for determining whether to detect the state of the vehicle-mounted power battery 3 according to the abnormal information and uploading the detection data of the vehicle-mounted power battery 3 to the VCU 6/the TEL 4/the ICM5 according to the detection result; as can be understood, the BMS board 2 detects the states of components inside the high voltage power storage battery, including the cell voltage, the module voltage, the total battery voltage, the current, the temperature, the battery insulation, and other parameters; and meanwhile, various operations of the internal components of the high-voltage power storage battery are controlled and coordinated, and when the condition of uploading data is determined to be met, the state data and the inspection data of the battery are uploaded.
In a specific embodiment, the input end of the BMS motherboard 2 is connected to the output end of the BMS slave board 1, and is configured to receive a wake-up signal, and detect the state of the vehicle-mounted power battery 3 when it is determined that the abnormal information satisfies a preset wake-up condition. It can be understood that when the state of the power battery is detected after the BMS motherboard 2 is awakened and it is determined that the data uploading condition is satisfied, the battery data during the failure is uploaded; and uploading data when thermal runaway is detected, sending alarm information to remind a user, and simultaneously informing after-sales personnel.
Specifically, as shown in fig. 3, after the BMS motherboard 2 receives the wake-up signal, it first determines whether the wake-up condition is valid, that is, whether the preset wake-up condition is satisfied, and after determining that the wake-up condition is satisfied (T2), it starts to upload data (status data of each battery module of the vehicle-mounted power battery 3) and performs battery detection (detect whether there is a fault), and performs a second-level sub-condition dynamic flash on the chip of the wake-up channel at a certain time after determining the wake-up condition (T3), and detects that the T4 does not satisfy the total thermal runaway condition (preset), and does not satisfy the second-level wake-up sub-condition (as described later), and then performs a sleep state, that is, it finds that there are no thermal failure and fault conditions after starting detection, and continues to; after a period of time (T5), the secondary wake-up sub-condition (fault) is met at a certain moment, the BMS board 2 continues to wake up (T6), the BMS board 2 detects the T8 after confirming the wake-up condition (T7), data is uploaded in the process, and the total thermal runaway condition (thermal runaway fault) is met at the moment T9 in the period of time, and then the data (thermal runaway data) is uploaded to T10.
More specifically, the secondary wake-up sub-condition is that the voltage is less than or equal to V/the voltage is greater than or equal to V/the temperature is greater than or equal to ℃. The first-level awakening sub-conditions are corresponding, when the first-level awakening sub-conditions determine a condition, the corresponding second-level awakening sub-conditions are required to be generated to start uploading data, and if the corresponding second-level awakening sub-conditions are not generated, the data are only detected not to be uploaded. Specifically, the correspondence between the primary wake-up sub-condition and the secondary wake-up sub-condition is as follows:
a voltage less than or equal to XV (primary wake-up condition), corresponding to which is a': a voltage less than or equal to XV (secondary wake-up condition);
b: a voltage greater than or equal to XV (primary wake-up condition), corresponding to b' a voltage greater than or equal to XV (secondary wake-up condition);
c: the temperature is greater than or equal to X ℃ (primary awakening condition), and the corresponding temperature is c': the temperature is greater than or equal to X ℃ (secondary awakening condition);
d: temperature sampling fault (X ℃) (primary wake-up condition).
More specifically, the output end of the BMS motherboard 2 is respectively connected to the input end of the VCU6, the input end of the TEL4, and the input end of the ICM5, and is configured to report the detected fault; when the BMS mainboard 2 detects that the vehicle-mounted power battery 3 is in fault, a battery fault state signal and a network management awakening signal are output to the VCU6, and the BMS mainboard is used for carrying out logic judgment on a plurality of functions, sending instructions to a plurality of parts of the whole vehicle and controlling the parts. For example: and (4) decision and control of functions of high voltage electricity, low voltage electricity, emergency high voltage electricity, charging, running and the like on the whole vehicle. When the BMS mainboard 2 detects the thermal runaway of the vehicle-mounted power battery 3, a thermal runaway fault prompt signal and a network management awakening signal are output to the TEL4 and the ICM5, the thermal runaway fault prompt signal and the network management awakening signal are used for displaying a vehicle state and vehicle fault alarm and prompt for a driver, and a data uploading background terminal 7 is used for data detection and analysis. When the BMS mainboard 2 detects that the detection data of the vehicle-mounted power battery 3 are uploaded, the detection data of the vehicle-mounted power battery 3 are uploaded to the background terminal 7 through the TEL4, and the data uploading background terminal 7 is used for data detection and analysis.
The TEL4 is used for uploading detection data of the vehicle-mounted power battery 3 to the background terminal 7. As can be understood, the input end of the background terminal 7 is connected to the output end of the TEL4, and is used for receiving detection data of the vehicle-mounted power battery 3; the output end of the background terminal 7 is connected with the mobile terminal and is used for outputting a data analysis result and an alarm signal; the background terminal 7 is generally arranged in a data monitoring center of a vehicle enterprise; receiving data uploaded by a remote communication module and interacting with a client mobile phone APP; the method can be used for data analysis, storage and APP transceiving instruction collection with a client; meanwhile, the vehicle rescue group and the emergency accident group can be contacted to deal with the vehicle faults and the like.
The invention also provides an automobile comprising the battery full-time detection system.
In summary, the embodiment of the invention has the following beneficial effects:
according to the full-time detection device and system for the battery and the automobile, provided by the invention, under the existing battery system structure, direct monitoring on thermal runaway is solved by a low-cost scheme (mainly aiming at improvement of a full-time detection strategy of an existing chip awakening function); when the BMS is in sleep, the BMS mainboard is awakened only when the BMS searches that the battery meets the awakening condition through the voltage comparison method, detection and confirmation are carried out, and the risk of low-voltage battery feed of the whole vehicle caused by real-time monitoring of battery failure or thermal runaway is reduced; and the battery part faults such as overlarge self-discharge of a battery core and the like are effectively determined.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
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