CN107394297B - Combined type battery fire alarm system - Google Patents
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- CN107394297B CN107394297B CN201710566523.6A CN201710566523A CN107394297B CN 107394297 B CN107394297 B CN 107394297B CN 201710566523 A CN201710566523 A CN 201710566523A CN 107394297 B CN107394297 B CN 107394297B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
Disclosed is a composite battery fire alarm system, which includes: the device comprises a first temperature monitoring unit, a smoke monitoring unit, a second temperature monitoring unit, a chemical composition monitoring unit, a power monitoring unit and a control unit. The monitoring unit is in communication connection with each monitoring unit through the control unit and is used for receiving monitoring data and generating a monitoring scheduling signaling and/or a fire alarm signaling according to the received monitoring data and preset data. The system can accurately and timely acquire the operating parameters in the battery, and can adjust and improve the monitoring and scheduling signaling in real time through rapid comprehensive analysis, thereby further improving the reliability of the system and reducing the energy consumption.
Description
Technical Field
The invention relates to the technical field of battery fire alarm, in particular to a combined type battery fire alarm system.
Background
The power battery is a power source for providing power source for the tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts. Which is mainly distinguished from a starting battery for starting an engine of an automobile. As an electric vehicle core component, safe operation of a power battery is a basis on which various aspects of equipment can be safely operated.
At present, power equipment of a new energy bus is mainly a power battery or a super capacitor, a plurality of battery boxes are generally installed in one new energy bus, and a large number of power battery units or super capacitors are installed in the battery boxes. When the conditions of short circuit thermal runaway, high temperature, extrusion by external force, puncture and the like occur inside the power battery or the super capacitor, the thermal expansion of the power battery or the capacitor is easily caused to cause explosion and combustion. And once a fire accident happens inside the battery box of the new energy bus, if effective fire extinguishing is not implemented in time, the life of the personnel on the bus can be endangered, and great loss is caused to the personal safety and property of the personnel on the bus.
Although the prior art has partial systems for monitoring the temperature and fire in the power battery compartment, the following disadvantages still exist. For example, the invention patent application with publication number CN 104537793A discloses a temperature and smoke joint control fire extinguishing circuit for a power battery compartment of a passenger car, and the device mainly carries out fire alarm prediction on the battery compartment through a traditional vehicle-mounted temperature sensor and a traditional smoke sensor. On one hand, however, the fire alarm cannot be comprehensively analyzed according to the actual operation condition of the battery compartment, so that the accuracy of the fire alarm is not high; on the other hand, the technical scheme only detects the temperature and smoke of the battery compartment environment, and actual abnormal conditions inside the battery cannot occur in time, so that the battery compartment has high hysteresis, is not favorable for finding out fire in time, and misses the best rescue opportunity.
The utility model discloses a utility model patent that grant publication number is CN 205549285U discloses a vehicle engine storehouse or power battery storehouse intelligence fire early warning and automatic fire extinguishing device, it still is through setting up the temperature-sensing ware and the smog inductor outside the battery to the temperature that battery storehouse has appeared or smog unusual to report to the police, has equally that the prediction degree of accuracy is not high, prediction hysteresis quality is strong scheduling problem.
Disclosure of Invention
At least one of the objectives of the present invention is to provide a composite battery fire alarm system, which can accurately and timely obtain the operating parameters inside the battery, and can adjust and improve the monitoring and scheduling signaling in real time through rapid comprehensive analysis, so as to improve the reliability of the system and reduce the energy consumption.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hybrid battery fire alarm system, comprising:
the first temperature monitoring unit is arranged outside the power battery unit and used for acquiring first temperature data of the power battery unit in the battery compartment;
the smoke monitoring unit is arranged in the battery compartment and used for acquiring smoke data in the battery compartment;
the second temperature monitoring unit is arranged in the power battery unit and used for acquiring second temperature data of the power battery unit;
the chemical composition monitoring unit is arranged in the power battery unit and is used for acquiring chemical composition data in the power battery unit;
the power monitoring unit is connected between the positive electrode and the negative electrode of the power battery unit and is used for acquiring power data of the power battery unit;
and the control unit is in communication connection with each monitoring unit and is used for receiving the monitoring data and generating a monitoring scheduling signaling and/or a fire alarm signaling according to the received monitoring data and preset data.
Preferably, the first temperature monitoring unit adopts a monolithic integrated two-end temperature-sensing current sensor which is arranged on the outer surface of the power battery unit or the inner wall of the battery compartment.
Preferably, the smoke monitoring unit adopts a surface ion type N-type semiconductor smoke sensor which is arranged on the inner surface of the battery compartment or the outer surface of the power battery unit.
Preferably, the chemical composition monitoring unit adopts a probe type ion concentration collector which extends into the power battery unit through an opening arranged on a safety valve of the power battery unit.
Preferably, the power monitoring unit adopts a single-phase electric energy metering chip, and is used for measuring active power, electric quantity, voltage effective value and current effective value.
Preferably, the control unit and each monitoring unit are electrically connected with the power battery unit and are powered by the power battery unit.
Preferably, the system further comprises one or more emergency battery units; the control unit and each monitoring unit supply power through the power battery unit or supply power through the emergency battery unit according to the monitoring scheduling instruction generated by the control unit.
Preferably, the control unit is configured to set a frequency of executing the monitoring command by each monitoring unit according to the first temperature data acquired by the first temperature monitoring unit.
Preferably, the control unit is configured to determine a current working state of the power battery according to the received power data and the chemical composition data, and set corresponding different monitoring and scheduling signaling according to the working state.
Preferably, the system further comprises a thermal equilibrium monitoring unit connected with the control unit and used for acquiring data of voltage difference and/or temperature difference between the power battery units; the control unit is further used for comparing the voltage difference value and/or the temperature difference value data acquired by the thermal balance monitoring unit with a preset difference value threshold value and sending a corresponding alarm signaling when the voltage difference value and/or the temperature difference value between the power battery units is larger than the preset threshold value.
In summary, due to the adoption of the technical scheme, the invention at least has the following beneficial effects:
by arranging the first temperature monitoring unit, the smoke monitoring unit, the second temperature monitoring unit, the chemical composition monitoring unit and the power monitoring unit, the system can accurately and timely acquire the operating parameters in the battery; the monitoring and scheduling signaling and/or the fire alarm signaling are generated by the control unit according to the received monitoring data and the preset data, and the system can adjust and improve the monitoring and scheduling signaling in real time through rapid comprehensive analysis, so that the reliability of the system is improved, and the energy consumption is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a hybrid battery fire alarm system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a hybrid battery fire alarm system according to another embodiment of the present invention;
fig. 3 is a schematic structural view of a hybrid battery fire alarm system according to still another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments, so that the objects, technical solutions and advantages of the present invention will be more clearly understood. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a hybrid battery fire alarm system according to an embodiment of the present invention includes:
the first temperature monitoring unit 1 is arranged outside the power battery unit (for example, on the inner wall of a battery compartment) and is used for acquiring environmental temperature data of the power battery unit in the battery compartment;
the smoke monitoring unit 2 is arranged in the battery compartment and used for acquiring smoke data in the battery compartment;
a second temperature monitoring unit (not shown in the figure) arranged inside the power battery unit and used for acquiring internal temperature data of the power battery unit;
a chemical composition monitoring unit (not shown in the figure) arranged inside the power battery unit and used for acquiring chemical composition data inside the power battery unit;
the power monitoring unit 3 is connected between the positive electrode and the negative electrode of the power battery unit and used for acquiring power data (such as charging voltage, charging current, discharging voltage and discharging current lamp) of the power battery unit;
and the control unit 4 is in communication connection with each monitoring unit and is used for receiving the monitoring data and generating a monitoring scheduling signaling and/or a fire alarm signaling according to the received monitoring data and preset data. The communication connection mode CAN be wired connection (such as a CAN bus, a universal serial bus, and the like), wireless connection (such as bluetooth, wiFi, zigBee, homekit, thread, and the like), or a combination thereof; the preset data comprises a charging/discharging characteristic database, a use environment threshold value database, an alarm threshold value database and the like of the power battery unit.
Fig. 2 illustrates a hybrid battery fire alarm system according to another embodiment of the present invention. The first temperature monitoring unit 1 may adopt a monolithic integrated two-end temperature sensing current sensor AD590 manufactured by american analog devices, to convert the temperature into current data, which increases an output current of 1 μ Α for every 1 increase in the range of-55 ℃ to 150 ℃. Specifically, the first temperature monitoring unit may be disposed on an outer surface (e.g., 11, 12 in fig. 2) of the power battery unit or an inner wall (e.g., 1 in fig. 1) of the battery compartment within the battery compartment, so that temperature data of an environment in which the power battery unit is located within the battery compartment may be accurately acquired.
The smoke monitoring unit 2 can adopt a surface ion type N-type semiconductor smoke sensor, tin dioxide can be used as a gas-sensitive material, and when the temperature is 200-300 ℃, the tin dioxide adsorbs oxygen in the air to form oxygen anion adsorption, so that the electron density in the semiconductor is reduced, and the resistance value of the semiconductor is increased. Which may be disposed on the inner surface of the battery compartment (e.g., 2 in fig. 1) or on the outer surface of the power cell unit (e.g., 21 in fig. 2).
The second temperature monitoring unit (not shown) may be a linear temperature sensing sensor (e.g., a temperature sensing cable) disposed inside the battery unit, for example, the temperature sensing cable may be disposed on the separator between the positive electrode and the negative electrode in the lithium ion power battery unit and led out through the opening 5 of the safety valve to be connected to the control unit 4.
The chemical composition monitoring unit can adopt a probe type ion concentration collector, which can extend into the power battery unit through an opening 5 arranged on a safety valve of the power battery unit, so as to obtain accurate chemical composition data in the battery unit, such as the concentration change condition of specific particles. Furthermore, the electric quantity and the charge state of the battery can be acquired according to the chemical composition data in the battery.
The power monitoring unit 3 can adopt Shenzhen market resultant force as the single-phase electric energy metering chip HLW8012 that science and technology promoted, and it can measure active power, electric quantity, voltage effective value, electric current effective value. HLW8012 is connected with the output and input poles of the power battery unit, and performs analog-to-digital conversion on the current and voltage sampling signals through a 2-path programmable gain amplifier and an analog-to-digital conversion circuit in the power battery unit to obtain digital signals, and further calculates through an operation circuit to obtain an active power value, a current effective value, a voltage effective value and the like, and converts the active power value, the current effective value, the voltage effective value and the like into square wave pulses to be output to the control unit. In a preferred embodiment, the power monitoring unit 3 may also be arranged directly inside the control unit 4.
Typically, the control unit 4 and each monitoring unit are electrically connected to and powered by a power cell unit. In a preferred embodiment, the system further comprises one or more emergency battery units 6, the control unit 4 and each monitoring unit can supply power through the power battery unit or the emergency battery unit 6 according to the monitoring scheduling command generated by the control unit 4, so that the reliability of the system can be improved.
The control unit 4 may set the frequency at which the monitoring unit executes the monitoring command according to the ambient temperature data in the battery compartment acquired by the first temperature monitoring unit 1. For example, the higher the ambient temperature, the higher the frequency with which each monitoring unit executes the monitoring command. And may determine whether to activate a monitoring unit partially disposed inside or outside the power battery unit according to the usage environment threshold, for example, when the ambient temperature is less than a first threshold (e.g., 30 degrees celsius), only the first temperature monitoring unit 1 is turned on and controlled to transmit the ambient temperature data at a low frequency, for example, once per second; when the ambient temperature is between a first threshold and a second threshold (for example, 50 degrees celsius), controlling the first temperature monitoring unit 1 to send the ambient temperature monitoring data every 0.1 second; when the ambient temperature is greater than the second threshold, the frequency of sending data by the first temperature monitoring unit 1 can be further increased, the smoke monitoring unit 3, the second temperature monitoring unit, the chemical component monitoring unit and the like are enabled, and the monitoring data are controlled to be sent at a higher frequency.
On the basis that the scheduling monitoring unit executes the monitoring command, the control unit 4 may further determine the current working state of the power battery (for example, no power output, charging in progress, charging completed, high-power peak output, continuous high-power output, and the like) according to the received power data and chemical component data, and the control unit may set corresponding different monitoring scheduling signaling according to the working state of the power battery. For example, when the operating state is a high power peak output, the frequency of executing the monitoring command of each monitoring unit is increased, thereby simultaneously improving the accuracy and real-time performance of monitoring. When the working state is no power output, the frequency of executing the monitoring command by each monitoring unit can be reduced, and part of the monitoring units can be further closed (for example, a second temperature monitoring unit and a chemical composition monitoring unit which are arranged inside the power battery unit are closed), so that the energy consumption of the system operation is reduced, and the operation time of the system can be prolonged.
When one or more of the monitoring data received by the control unit 4 reaches an alarm threshold, the control unit 4 generates a corresponding alarm signaling and sends the alarm signaling to a corresponding alarm device or a communication interface of the fire fighting device through the communication interface. In other embodiments, the alarm signaling may be further sent to an alarm interface of the fire department.
As shown in fig. 3, the hybrid battery fire alarm system according to still another embodiment of the present invention may further include an air pressure monitoring unit and a thermal imaging monitoring unit to further improve the accuracy of the acquired monitoring data. The air pressure monitoring unit can be arranged in the battery compartment and used for acquiring air pressure data in the battery compartment; the thermal imaging monitoring unit can be arranged outside the battery compartment and used for acquiring temperature distribution data of the battery compartment.
When a plurality of power battery units are arranged in the battery compartment, the system can further comprise a thermal balance monitoring unit which is connected with the control unit or arranged inside the control unit and used for acquiring the voltage difference and the temperature difference between the power battery units. The control unit can further compare the voltage difference value and/or temperature difference value data acquired by the thermal balance monitoring unit with a preset difference value threshold value, adjust and improve monitoring scheduling signaling in real time according to the comparison result, and send corresponding alarm signaling when the voltage difference value and/or temperature difference value between the power battery units is larger than the preset threshold value.
The foregoing is merely a detailed description of specific embodiments of the invention and is not intended to limit the invention. Various alterations, modifications and improvements will occur to those skilled in the relevant art without departing from the spirit and scope of the invention.
Claims (10)
1. A hybrid battery fire alarm system, the system comprising:
the first temperature monitoring unit is arranged outside the power battery unit and used for acquiring first temperature data of the power battery unit in the battery compartment;
the smoke monitoring unit is arranged in the battery compartment and used for acquiring smoke data in the battery compartment;
the second temperature monitoring unit is arranged in the power battery unit and used for acquiring second temperature data of the power battery unit;
the chemical component monitoring unit is arranged in the power battery unit and used for acquiring chemical component data in the power battery unit;
the power monitoring unit is connected between the positive electrode and the negative electrode of the power battery unit and is used for acquiring power data of the power battery unit;
and the control unit is in communication connection with each monitoring unit and is used for receiving the monitoring data and generating a monitoring scheduling signaling and/or a fire alarm signaling according to the received monitoring data and preset data.
2. The system of claim 1, wherein the first temperature monitoring unit is a monolithic integrated two-terminal temperature-sensing current sensor disposed on an outer surface of the power battery unit or an inner wall of the battery compartment.
3. The system of claim 1, wherein the smoke monitoring unit employs a surface ion N-type semiconductor smoke sensor disposed on an interior surface of a battery compartment or on an exterior surface of a power cell.
4. The system of claim 1, wherein the chemical composition monitoring unit is a probe-type ion concentration collector which extends into the power battery unit through an opening provided on a safety valve of the power battery unit.
5. The system of claim 1, wherein the power monitoring unit employs a single-phase power metering chip for measuring active power, quantity of electricity, voltage virtual value, and current virtual value.
6. The system of claim 1, wherein the control unit and each monitoring unit are electrically connected to and powered by a power cell unit.
7. The system of claim 1, further comprising one or more emergency battery units; the control unit and each monitoring unit supply power through the power battery unit or supply power through the emergency battery unit according to the monitoring scheduling instruction generated by the control unit.
8. The system of claim 1, wherein the control unit is configured to set a frequency at which each monitoring unit executes the monitoring command based on the first temperature data obtained by the first temperature monitoring unit.
9. The system of claim 8, wherein the control unit is configured to determine an operating status of the current power battery according to the received power data and the chemical composition data, and set corresponding different monitoring and scheduling signaling according to the operating status.
10. The system of claim 1, further comprising a thermal equilibrium monitoring unit connected to the control unit for obtaining data on voltage differences and/or temperature differences between the power cells; the control unit is further used for comparing the voltage difference value and/or the temperature difference value data acquired by the thermal balance monitoring unit with a preset difference value threshold value and sending a corresponding alarm signaling when the voltage difference value and/or the temperature difference value between the power battery units is larger than the preset threshold value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108075197B (en) * | 2017-12-11 | 2019-11-15 | 北京小米移动软件有限公司 | Battery method for early warning, device and storage medium |
| CN109187618B (en) * | 2018-09-21 | 2020-11-20 | 杭州纳戒科技有限公司 | Logistics box monitoring mechanism and system |
| DE102018217600A1 (en) * | 2018-10-15 | 2020-04-16 | Continental Automotive Gmbh | Method and battery sensor for fire detection in a vehicle and vehicle |
| US20200313249A1 (en) * | 2019-03-31 | 2020-10-01 | Ruichen Zhao | Systems and Applications Based on Modular Battery Packs |
| CN112928348B (en) * | 2019-04-30 | 2022-04-26 | 宁德时代新能源科技股份有限公司 | Battery thermal runaway detection method, device and system and battery management unit |
| CN112085864A (en) * | 2020-08-25 | 2020-12-15 | 龙铁纵横（北京）轨道交通科技股份有限公司 | Data management method and system, terminal device and computer readable storage medium |
| CN112863106B (en) * | 2021-02-01 | 2023-04-28 | 重庆金康赛力斯新能源汽车设计院有限公司 | Fireproof alarm method, system and electronic equipment |
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