CN114184639A - Thermal diffusion detection method and system of battery system, storage medium and intelligent terminal - Google Patents
Thermal diffusion detection method and system of battery system, storage medium and intelligent terminal Download PDFInfo
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Abstract
The application relates to a thermal diffusion detection method, a thermal diffusion detection system, a storage medium and an intelligent terminal of a battery system, relating to the field of battery safety technology and comprising the steps of obtaining first temperature information of a first detection point and second temperature information of a second detection point; judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not; if the temperature is not higher than the reference temperature, outputting a normal signal; if the difference value is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference between the temperature corresponding to the first temperature information and the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information; judging whether the value corresponding to the actual temperature information is greater than the reference temperature or not; if the temperature is higher than the reference temperature, outputting an abnormal signal; and if the temperature is not higher than the reference temperature, outputting a prompt signal. The method and the device have the effect of improving the accuracy of the safety analysis of the battery system.
Description
Technical Field
The present application relates to the field of battery safety technologies, and in particular, to a thermal diffusion detection method and system for a battery system, a storage medium, and an intelligent terminal.
Background
With the development of battery technology, batteries are commonly used in the form of a battery system (composed of a plurality of single batteries), and due to the increase of the number of battery bases, safety analysis for the battery system becomes more and more important.
In the related art, when the safety of the battery system is analyzed, the battery is used to emit heat, so that the heat degree of the battery system is often detected to judge whether the battery system is in a safe state, and when the collected temperature is higher than an allowable temperature value, the abnormal condition of the battery system is indicated.
In view of the above-described related art, the inventors of the present invention have considered that, when a heat source is present outside a battery system during safety analysis of the battery system, there is a possibility that the analysis may be inaccurate, and there is room for improvement.
Disclosure of Invention
In order to improve the accuracy of the safety analysis of the battery system, the application provides a thermal diffusion detection method and system of the battery system, a storage medium and an intelligent terminal.
In a first aspect, the present application provides a thermal diffusion detection method for a battery system, which adopts the following technical scheme:
a thermal diffusion detection method of a battery system, comprising:
defining that the side wall of the battery system is provided with a plurality of first detection points and second detection points, wherein the first detection points correspond to the second detection points one by one, the first detection points are positions inside the battery system for detecting the internal temperature, and the second detection points are positions outside the battery system for detecting the external temperature;
acquiring first temperature information of a first detection point and second temperature information of a second detection point;
judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
if the temperature corresponding to the first temperature information is not greater than the reference temperature, outputting a normal signal;
if the temperature corresponding to the first temperature information is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference between the temperature corresponding to the first temperature information and the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information;
judging whether the value corresponding to the actual temperature information is greater than the reference temperature or not;
if the value corresponding to the actual temperature information is larger than the reference temperature, outputting an abnormal signal;
and if the value corresponding to the actual temperature information is not greater than the reference temperature, outputting a prompt signal.
By adopting the technical scheme, when the heat of the battery system is detected, the first temperature information and the second temperature information are respectively obtained, when the temperature corresponding to the first temperature information does not exceed the reference temperature, the battery in the battery system is not short-circuited and heated and is in a normal use state, when the temperature corresponding to the first temperature information exceeds the reference temperature, the temperature transmitted by the second detection point to the first detection point can be determined according to the temperature corresponding to the second temperature information and the conversion rate, so that the self heating condition of the battery can be calculated to judge whether the temperature of the battery exceeds the reference temperature, if so, the self heating of the battery is serious, an abnormal signal is output to indicate that the safety of the battery is poor, if not, the heating of the battery is not serious, and a prompt signal is output to prompt a worker that the battery system is influenced by an external heating source, so that the staff can process the heating source in time, and the accuracy of the safety analysis of the battery system is improved.
Optionally, the method further includes a heat dissipation method, and the method includes:
matching the gear information stored in the preset gear database and the corresponding temperature information with the first temperature information to determine the current gear information of the cooling fan preset at the first detection point;
judging whether an abnormal signal exists or not;
if no abnormal signal exists, the cooling fan is controlled to adjust to the gear corresponding to the current gear information for cooling;
if the abnormal signal exists, controlling the cooling fan to adjust to the preset highest gear and outputting timing information;
judging whether a normal signal exists when the time corresponding to the timing information reaches the preset heat dissipation time;
if the time corresponding to the timing information reaches the heat dissipation time, a normal operation signal is output;
and if no normal signal exists when the time corresponding to the timing information reaches the heat dissipation time, outputting an alarm signal.
By adopting the technical scheme, different gears of the cooling fan are determined to work according to different temperatures of the first detection point, so that the battery can better dissipate heat, the power consumed by the cooling fan is reduced, and the energy is saved; when no normal signal exists after the radiator fan is operated for the preset time with the maximum gear, the state of the current battery cannot be cooled by the radiator fan, and an alarm signal is output to enable a worker to know the condition, so that the worker can conveniently process the condition.
Optionally, the method further includes:
defining the temperature corresponding to the first temperature information when the timing information starts to time as an initial temperature, and defining the temperature corresponding to the first temperature information when the time corresponding to the timing information reaches the preset detection time as a termination temperature;
acquiring difference temperature information, wherein the temperature corresponding to the difference temperature information is the difference between the ending temperature and the initial temperature;
calculating and acquiring a heating rate according to the difference temperature information and the detection time;
judging whether the temperature rise rate is greater than a preset safe rate or not;
if the heating rate is not greater than the safe rate, outputting a normal heating signal;
and if the temperature rise rate is greater than the safety rate, controlling the preset fire extinguishing device to operate on the battery opposite to the first detection point.
Through adopting above-mentioned technical scheme, judge the size of rate of rise in order to judge whether the condition of a fire appears, when rate of rise in temperature was greater than safe rate, then the battery is generated heat probably because the condition of a fire arouses, utilizes extinguishing device to carry out the operation to the battery that generates heat this moment to reduce the condition emergence of the condition of a fire increase.
Optionally, an air bag is preset at the second detection point, a gas check valve is arranged at a gas outlet of the air bag, and the gas flow direction of the gas check valve is from the inside of the air bag to the outside;
acquiring gas volume information of gas blown out by the airbag;
matching the adjustment temperature value and the corresponding gas volume information stored in the preset temperature database with the gas volume information of the airbag to determine a first adjustment temperature;
acquiring pressure information of a squeezing point which is preset on the outer side wall of the battery system and can be squeezed by the air bag;
judging whether the pressure value corresponding to the pressure information is consistent with a preset reference pressure value or not;
if the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjusting temperature and the preset fixed temperature to obtain second temperature information.
By adopting the technical scheme, when the second detection point is heated, the gas in the air bag is heated and expanded to blow outwards through the gas one-way valve, and the changed temperature value can be judged through the amount of the gas blown out from the air bag, so that the second temperature information of the second detection point is determined.
Optionally, if the pressure value corresponding to the pressure information is not consistent with the reference pressure value, the method for acquiring the second temperature information includes:
controlling a preset air pump to inflate the air bag until a positioning signal is obtained;
acquiring the inflation volume information of the gas filled into the airbag before the in-position signal of the air pump is generated;
calculating a difference value to obtain difference value volume information, wherein the difference value is the difference between the volume corresponding to the gas volume information and the volume corresponding to the inflation volume information, and updating the difference value volume information into new gas volume information;
determining a second adjustment temperature according to the adjustment temperature value stored in the temperature database and the matching of the corresponding gas volume information and the difference volume information;
calculating a difference value to obtain second temperature information, wherein the difference value is the difference between the fixed temperature and the second adjustment temperature;
and updating the temperature corresponding to the second temperature information to be a new fixed temperature.
By adopting the technical scheme, when the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the airbag is not in the expanded state, which is possibly caused by the reduction of the gas in the airbag due to the temperature reduction of the second detection point, the airbag is inflated by the air pump at the moment so that the gas outlet of the airbag can be re-vented, and the size of the expanded volume of the airbag at the temperature is judged according to the volume of the gas inflated by the air pump at the moment, so that the second temperature information can be obtained.
Optionally, the method further includes:
acquiring the inflation duration information of single operation of the air pump;
judging whether the time length corresponding to the inflation time length information reaches the preset allowable time length or not;
if the time length corresponding to the inflation time length information does not reach the allowable time length, outputting a normal inflation signal;
and if the time length corresponding to the inflation time length information reaches the allowable time length, controlling the air pump to be closed and outputting an air bag damage signal.
Through adopting above-mentioned technical scheme, in the single operation in-process of air pump, if the duration of operation is longer than permission duration, then probably the gasbag damage leads to the gasbag can't be full of to output gasbag damage signal so that the staff learns this condition, the staff of being convenient for is handled this condition.
Optionally, the method further includes:
determining first temperature information with the highest corresponding temperature in all the first temperature information according to a preset sequencing rule, and determining battery position information of the corresponding battery according to the first temperature information;
and controlling the preset heat dissipation device to move to the position projection superposition position corresponding to the battery position information to dissipate heat of the battery, wherein the air outlet of each air bag is communicated with the heat dissipation device.
By adopting the technical scheme, the gas blown out from the air outlet of the air bag can enter the heat dissipation device, so that the heat dissipation device can dissipate heat of the battery by using the gas, and the waste of energy is reduced; meanwhile, the battery temperature in the battery system can be known to be the highest through judging the temperature corresponding to the first temperature information, so that the heat dissipation device can dissipate heat of the battery, and the situation that the battery temperature is too high is reduced.
In a second aspect, the present application provides a thermal diffusion detection system for a battery system, which adopts the following technical solution:
a thermal diffusion detection system for a battery system, comprising:
the acquisition module is used for acquiring first temperature information of the first detection point and second temperature information of the second detection point;
the processing module is connected with the acquisition module and the judgment module and used for storing and processing information;
the judging module is used for judging whether the temperature corresponding to the first temperature information is greater than the preset reference temperature or not;
if the judging module judges that the temperature corresponding to the first temperature information is not greater than the reference temperature, the processing module outputs a normal signal;
if the judging module judges that the temperature corresponding to the first temperature information is greater than the reference temperature, the processing module calculates a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information;
the judgment module judges whether the value corresponding to the actual temperature information is greater than the reference temperature;
if the judgment module judges that the value corresponding to the actual temperature information is larger than the reference temperature, the processing module outputs an abnormal signal;
and if the judgment module judges that the value corresponding to the actual temperature information is not greater than the reference temperature, the processing module outputs a prompt signal.
By adopting the technical scheme, when the heat of the battery system is detected, the acquisition module is used for respectively acquiring the first temperature information and the second temperature information, when the judgment module judges that the temperature corresponding to the first temperature information does not exceed the reference temperature, the short circuit heating phenomenon of the battery in the battery system is not generated, the battery is in a normal use state, when the judgment module judges that the temperature corresponding to the first temperature information exceeds the reference temperature, the processing module can determine the temperature transmitted by the second detection point to the first detection point according to the temperature corresponding to the second temperature information and the conversion rate, so that the self heating condition of the battery can be calculated, the judgment module is used for judging whether the temperature of the battery exceeds the reference temperature, if the judgment module judges that the temperature exceeds the reference temperature, the self heating of the battery is serious, the processing module outputs an abnormal signal to indicate that the safety of the battery is poor, and if the judgment module judges that the temperature does not exceed the reference temperature, the battery heating is not serious, and the processing module outputs a prompt signal to prompt a worker that the battery system is influenced by an external heating source, so that the worker can timely process the heating source, and the accuracy of the safety analysis of the battery system is improved.
In a third aspect, the present application provides an intelligent terminal, which adopts the following technical scheme:
an intelligent terminal comprises a memory and a processor, wherein the memory is stored with a computer program which can be loaded by the processor and can execute the thermal diffusion detection method of any battery system.
By adopting the technical scheme, when the heat of the battery system is detected by using the intelligent terminal, the first temperature information and the second temperature information are respectively obtained, when the temperature corresponding to the first temperature information does not exceed the reference temperature, the battery in the battery system is not short-circuited and heated and is in a normal use state, when the temperature corresponding to the first temperature information exceeds the reference temperature, the temperature transmitted by the second detection point to the first detection point can be determined according to the temperature corresponding to the second temperature information and the conversion rate, so that the heating condition of the battery can be calculated to judge whether the temperature of the battery exceeds the reference temperature, if so, the battery is heated seriously, an abnormal signal is output to indicate that the safety of the battery is poor, if not, the battery is heated badly, and a prompt signal is output to prompt a worker that the battery system is influenced by an external heating source, so that the staff can process the heating source in time, and the accuracy of the safety analysis of the battery system is improved.
In a fourth aspect, the present application provides a computer storage medium, which can store a corresponding program, and has a feature of improving the accuracy of battery system safety analysis, and adopts the following technical scheme:
a computer readable storage medium storing a computer program that can be loaded by a processor and executed to perform any of the above-described thermal diffusion detection methods for a battery system.
By adopting the technical scheme, the storage medium is provided with a computer program of the thermal diffusion detection method of the battery system, when the heat of the battery system is detected, the first temperature information and the second temperature information are respectively obtained, when the temperature corresponding to the first temperature information does not exceed the reference temperature, the short circuit heating phenomenon of the battery in the battery system is not generated, the battery is in a normal use state, when the temperature corresponding to the first temperature information exceeds the reference temperature, the temperature transmitted by the second detection point to the first detection point can be determined according to the temperature corresponding to the second temperature information and the conversion rate, so that the self heating condition of the battery can be calculated to judge whether the temperature of the battery exceeds the reference temperature, if so, the self heating of the battery is serious, an abnormal signal is output to indicate that the safety of the battery is poor, and if not, the heating of the battery is not serious, and outputting a prompt signal to prompt a worker that the battery system is influenced by an external heating source so that the worker can timely process the heating source, and the accuracy of the safety analysis of the battery system is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the condition that the battery system is influenced by an external heating source to carry out misjudgment during safety analysis can be reduced by judging the temperature of the outer surface of the battery system, so that the accuracy during safety analysis is improved;
2. the condition that the fire extends outwards can be reduced through the judgment of the temperature rise rate, and the safety of the battery system during safety analysis is improved;
3. the gas exhausted from the air bag can be used for heat dissipation of the battery, and waste of energy is reduced.
Drawings
Fig. 1 is a flowchart of a thermal diffusion detection method of a battery system.
Fig. 2 is a flow chart of a radiator fan gear selection method.
Fig. 3 is a flowchart of a fire determination method.
Fig. 4 is a flowchart of a second detected point temperature detecting method.
Fig. 5 is a flowchart of an airbag state detection method.
Fig. 6 is a flow chart of a method of peak temperature heat dissipation.
Fig. 7 is a block flow diagram of a thermal diffusion detection method of a battery system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-7 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.
The embodiment of the application discloses thermal diffusion detection method of battery system, when the safety of battery system is analyzed, the influence caused by external heat source can be reduced through the detection of internal temperature and external temperature of battery system, thereby improving the accuracy of the safety analysis of battery system.
Referring to fig. 1, a method flow of thermal diffusion detection of a battery system includes the steps of:
step S100: defining the side wall of the battery system to be provided with a plurality of first detection points and second detection points, wherein the first detection points correspond to the second detection points one by one, the first detection points are positions inside the battery system for detecting the internal temperature, and the second detection points are positions outside the battery system for detecting the external temperature.
The battery system comprises a shell for placing the batteries and a plurality of batteries placed in the shell, the side wall of the battery system is the side wall of the shell, the number of the first detection points and the number of the second detection points are both consistent with the number of the batteries, the first detection points are located on the inner side wall of the shell and close to the corresponding batteries, the second detection points are located on the outer side wall of the shell and opposite to the first detection points, and the second detection points are set by workers according to actual conditions without repeated description.
Step S101: and acquiring first temperature information of the first detection point and second temperature information of the second detection point.
The temperature corresponding to the first temperature information is the temperature of the first detection point, and the temperature corresponding to the second temperature information is the temperature of the second detection point, both of which can be collected by an instrument capable of measuring temperature, such as a temperature sensor, which is a conventional technical means of those skilled in the art and will not be described in detail.
Step S102: and judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature.
The reference temperature is the maximum heating value allowed by the battery, and is set by the staff according to the actual situation, which is not described in detail; the purpose of the judgment is to know whether the temperature of the first detection point exceeds the maximum heating value allowed by the battery, so as to facilitate the subsequent analysis of the safety of the battery.
Step S1021: and if the temperature corresponding to the first temperature information is not greater than the reference temperature, outputting a normal signal.
When the temperature that first temperature information corresponds is not more than the reference temperature, explain that the temperature of first check point does not exceed the allowable temperature value to indirectly explain that the temperature of battery does not exceed the allowable temperature value, battery at this moment is in normal operating condition, the problem that technical staff in the field known such as short circuit does not appear, output normal signal so that outside staff knows that battery system is in normal operating condition, so that the staff carries out further security detection and analysis to battery system.
Step S1022: if the temperature corresponding to the first temperature information is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference between the temperature corresponding to the first temperature information and the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information.
When the temperature corresponding to the first temperature information is greater than the reference temperature, the temperature of the first detection point exceeds the reference temperatureThe allowable temperature value may be the battery heating caused by the reason that the temperature of the first detection point is too high at this time, and may be the heating source existing outside the battery system, the conversion temperature is the temperature transmitted from the second detection point to the first detection point, the conversion rate is the conversion rate at which the temperature of the second detection point can be converted to the temperature of the first detection point, and is determined by parameters such as the material of the battery system shell, and the like, and the shell material is selected by a worker according to the actual situation, which is not described in detail; the actual temperature information is the heat emitted by the battery itself, and can be represented by the formula T1=T2*a%+T3Calculation of where T1Is the temperature, T, corresponding to the first temperature information2Is the temperature corresponding to the second temperature information, a% is the conversion rate, T3The temperature is corresponding to the actual temperature information.
Step S103: and judging whether the value corresponding to the actual temperature information is greater than the reference temperature.
The purpose of the judgment is to know whether the temperature of the battery exceeds the allowed maximum temperature value so as to judge whether the battery is in a safe state.
Step S1031: and if the value corresponding to the actual temperature information is greater than the reference temperature, outputting an abnormal signal.
When the value corresponding to the actual temperature information is larger than the reference temperature, the temperature of the battery is high, the battery is possibly in a short-circuit abnormal heating state at the time, and an abnormal signal is output to record the situation so as to be convenient for follow-up treatment of the situation.
Step S1032: and if the value corresponding to the actual temperature information is not greater than the reference temperature, outputting a prompt signal.
When the value corresponding to the actual temperature information is not greater than the reference temperature, it indicates that the temperature of the battery is not high, and at this time, the temperature of the first detection point is too high, which may be caused by the presence of a heat source outside, and a prompt signal is output to remind a worker to solve the problem, and the prompt signal may be any signal having a prompt function, such as an indicator light, a horn, and the like, and is a conventional technical means for those skilled in the art, and is not described in detail.
Referring to fig. 2, a heat dissipation method is further included, the method including:
step S200: and determining the current gear information of the cooling fan preset at the first detection point according to the gear information stored in the preset gear database and the matching of the corresponding temperature information and the first temperature information.
The cooling fan is arranged at the first detection point in advance, a worker sets a hole for supplying wind energy to the cooling fan according to actual conditions, the first detection point and the second detection point are not communicated due to the arrangement of the cooling fan and the hole, gear information is the gear which can be reached by the cooling fan, and the worker selects the cooling fan with proper power according to the heating condition of a battery to enable the gear of the cooling fan to meet the requirement; the temperature corresponding to the temperature information is matched with the gear of the cooling fan, for example: the temperature is 20-30 ℃, the temperature corresponds to the I gear of the cooling fan, the temperature is 30-40 ℃, the temperature corresponds to the II gear of the cooling fan, the relation between the two gears is set by workers according to experimental conditions, and the repeated description is omitted; the gear database is composed of different temperature information and corresponding gear information, and is established by a worker through continuous tests, and the establishment process is a conventional technical means of the worker in the field and is not described in detail; when the first temperature information is input into the gear database, gear information corresponding to the temperature corresponding to the first temperature information can be output at the moment, and the gear information is the current gear information of the cooling fan.
Step S201: and judging whether an abnormal signal exists or not.
The purpose of the judgment is to know whether the temperature of the battery exceeds the allowed maximum temperature value under the action of the cooling fan, so that the subsequent cooling can be further controlled.
Step S2011: and if the abnormal signal does not exist, controlling the cooling fan to adjust to the gear corresponding to the current gear information for cooling.
When no abnormal signal exists, the battery temperature can be controlled only through heat dissipation of the heat dissipation fan at the temperature, and the heat dissipation fan is controlled to adjust the battery to the gear corresponding to the current gear information to dissipate heat, so that the battery can conduct good heat dissipation.
Step S2012: if the abnormal signal exists, the cooling fan is controlled to be adjusted to the preset highest gear and timing information is output.
When an abnormal signal exists, it is indicated that the temperature of the battery per se exceeds an allowed maximum temperature value at the temperature, and at the moment, the cooling fan is controlled to be adjusted to the highest gear to cool the battery, so that the cooling effect of the battery is improved, wherein the highest gear is determined by the power of the cooling fan, and the gear condition is set by a worker according to the actual condition, which is not described in detail; the duration corresponding to the timing information is the duration of the highest gear operation of the cooling fan.
Step S202: and judging whether a normal signal exists when the time corresponding to the timing information reaches the preset heat dissipation time.
The heat dissipation time is a fixed value set in advance, the battery can be dissipated after the time of the highest gear operation of the heat dissipation fan under normal conditions, and the specific heat dissipation time is set by a worker according to actual conditions and is not described any more; the purpose of judging is when the length of time that the radiator fan used the highest gear to carry out the operation reaches the radiating time in order to learn, whether the decline of temperature was realized to the battery, is convenient for follow-up further analysis to battery security.
Step S2021: and if the normal signal exists when the time corresponding to the timing information reaches the heat dissipation time, outputting a normal operation signal.
When the time corresponding to the timing information reaches the heat dissipation time, a normal signal exists, which indicates that the battery is cooled under the action of the heat dissipation fan, and the battery only has the problem of temperature rise caused by untimely heat dissipation at the moment, and a normal operation signal is output so that a worker knows that the battery is in a normal working state.
Step S2022: and if no normal signal exists when the time corresponding to the timing information reaches the heat dissipation time, outputting an alarm signal.
When the time corresponding to the timing information reaches the heat dissipation time, no normal signal exists, which indicates that the battery is still in the situation of over-high temperature under the action of the heat dissipation fan, and at this time, an alarm signal is output to enable a worker to know the situation, so that the worker can conveniently process the situation in time, and the alarm signal is a signal with a prompt function, such as flashing of an indicator light, which is a conventional technical means for the worker in the field and is not described in detail.
Referring to fig. 3, the thermal diffusion detection method of the battery system further includes:
step S300: defining the temperature corresponding to the first temperature information when the timing information starts to time as the initial temperature, and defining the temperature corresponding to the first temperature information when the time corresponding to the timing information reaches the preset detection time as the termination temperature.
The detection time is a fixed duration, and is set by a worker according to the actual situation, which is not described in detail; when the timing information starts to count from zero, the temperature corresponding to the first temperature information is the initial temperature, after the action detection time of the cooling fan, the temperature corresponding to the first temperature is the final temperature, and the two temperatures are marked so as to be called subsequently.
Step S301: and acquiring difference temperature information, wherein the temperature corresponding to the difference temperature information is the difference of the ending temperature minus the initial temperature.
The temperature corresponding to the difference temperature information is the difference of the ending temperature minus the initial temperature, and the calculation formula is T13=T11-T12Wherein, T11Temperature value, T, of final temperature12A temperature value, T, of the initial temperature13Is the temperature corresponding to the difference temperature information.
Step S302: and calculating and acquiring the heating rate according to the difference temperature information and the detection time.
The magnitude of the temperature rise rate expresses the temperature rise speed of the battery, and the calculation formula is
Wherein, in the step (A),
in order to detect the duration corresponding to the time,
is the value of the rate of temperature rise.
Step S303: and judging whether the temperature rise rate is greater than a preset safe rate.
The safety rate is a fixed value, is the maximum speed value of the battery temperature rise which is not the fire, is obtained by a worker according to a plurality of tests, is a conventional technical means of the worker in the field, and is not described in detail; the purpose of the judgment is to know whether the temperature rise rate exceeds a safe rate so as to judge whether a fire occurs.
Step S3031: and if the temperature rise rate is not greater than the safety rate, outputting a normal temperature rise signal.
When the rate of temperature rise is not greater than the safe rate, explain that the condition of a fire does not appear in the battery, output normal signal of temperature rise this moment so that the staff learns this condition, make the staff get rid of the condition of a fire condition, the staff of being convenient for in time finds out the battery reason that generates heat to in time handle this condition.
Step S3032: and if the temperature rise rate is greater than the safety rate, controlling the preset fire extinguishing device to operate on the battery opposite to the first detection point.
When rate of rise is greater than safe speed, it is too fast to explain battery rate of rise, it is probably that the condition of a fire leads to this moment, control extinguishing device puts out a fire to the battery that first check point corresponds, take place in order to reduce the condition of a fire diffusion, wherein, extinguishing device is for setting up the device that is used for putting out a fire in the battery system in advance, extinguishing device who uses in this application includes first fire extinguisher and second fire extinguisher, first fire extinguisher can be the carbon dioxide fire extinguisher, the second fire extinguisher can be the dry powder fire extinguisher, when the condition of a fire appears, use first fire extinguisher effect to predetermine for a long time earlier, if the temperature does not descend, reuse second fire extinguisher to put out a fire.
Referring to fig. 4, the second temperature information acquiring method includes:
step S400: an air bag is preset in the second detection point, an air outlet of the air bag is provided with an air one-way valve, and the air flow direction of the air one-way valve is from the inside of the air bag to the outside.
The air bag is arranged at the second detection point, the initial gas in the air bag is in a state of fully expanding the air bag at room temperature, the air bag cannot continue to expand outwards at the moment, and the gas check valve is arranged at the gas outlet of the air bag to control the flow direction of the gas at the gas outlet of the air bag, so that the external gas cannot enter the air bag through the gas outlet of the air bag.
Step S401: and acquiring gas volume information of gas blown out by the airbag.
The volume corresponding to the gas volume information is the amount of gas blown out from the gas outlet by the airbag, and can be obtained by the flow velocity sensor, which is a conventional technical means for those skilled in the art and is not described in detail.
Step S402: and matching the adjustment temperature value and the corresponding gas volume information stored in the preset temperature database with the gas volume information of the airbag to determine a first adjustment temperature.
The temperature value is adjusted to be the temperature value to be adjusted, when the air bag is heated, the gas in the air bag is heated and expanded and can move out of the air bag from the air outlet, and the different gas amounts are caused by the different temperatures, so that the temperature to be adjusted relative to the room temperature can be determined according to the gas volume information, and a temperature database can be established according to the different gas volume information and the corresponding adjusted temperature values, and the establishment process of the temperature database is a conventional technical means of a person skilled in the art and is not described in detail; when the gas volume information of the airbag is input into the temperature database, the corresponding adjustment temperature value, namely the first adjustment temperature, can be matched.
Step S403: and acquiring pressure information of a preset extrusion point on the outer side wall of the battery system, wherein the extrusion point can be extruded by the air bag.
The extrusion point is a pressure sensor arranged on the outer side wall of the shell, when the air bag is in the full expansion state, the air bag can extrude the extrusion point, and the pressure value corresponding to the pressure information is the extrusion force of the air bag to the extrusion point.
Step S404: and judging whether the pressure value corresponding to the pressure information is consistent with the preset reference pressure value.
The reference pressure value is the extrusion force of the air bag on the extrusion point in the full inflation state, and the judgment is carried out for knowing whether the air bag is in the full inflation state or not so as to judge whether the air bag is in the temperature rising state or not.
Step S4041: if the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjusting temperature and the preset fixed temperature to obtain second temperature information.
When the pressure value corresponding to the pressure information is consistent with the reference pressure value, the airbag is in an inflation state all the time, namely the airbag is in a heating state, a positioning signal is output to mark the situation, the fixed temperature, namely the room temperature, is set by a worker according to the environment and is not repeated, the calculation formula of the temperature corresponding to the second temperature information is T2=T0+T4Wherein, T0To fix the temperature, T2Is the temperature, T, corresponding to the second temperature information4The first adjusted temperature.
Step S4042: and if the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, controlling a preset air pump to inflate the air bag until an in-position signal is obtained.
When the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the airbag is not in the full inflation state, and at this time, the second temperature information can not be determined through the gas output amount due to the fact that the gas is reduced after the temperature of the airbag is reduced; the air pump is a device which is always connected with the air bag and used for supplying air to the interior of the air bag, the air pump is used for continuously inflating the air bag until a positioning signal is obtained, the situation that the air bag is in a full inflation state under the inflation action of the air pump is shown, and when the positioning signal is obtained, the air pump stops running.
Step S405: and acquiring the inflation volume information of the gas filled into the airbag before the in-position signal of the air pump is generated.
The volume corresponding to the inflation volume information is the single inflation volume of the air pump to the air bag, and can be obtained through a gauge arranged at the air outlet of the air pump, and is a conventional technical means of a person skilled in the art.
Step S406: and calculating a difference value to obtain difference value volume information, wherein the difference value is the difference between the volume corresponding to the gas volume information and the volume corresponding to the inflation volume information, and updating the difference value volume information into new gas volume information.
The difference value volume information is the volume difference value of the air bag when the air bag is filled with air and is compared with the first air bag when the air bag is filled with air, whether the air bag is increased or decreased compared with the first air bag can be judged through the volume difference value, the difference value volume information is updated to be new gas volume information so as to be convenient for calculating the volume change of the next air bag, wherein the calculation formula of the volume corresponding to the difference value volume information is Q0=Q2-Q1Wherein Q is0Capacity, Q, corresponding to differential volume information1Volume, Q, corresponding to the information of the volume of the charge2The volume corresponding to the gas volume information.
Step S407: and matching the adjustment temperature value stored in the temperature database and the corresponding gas volume information with the difference volume information to determine a second adjustment temperature.
When the difference volume information is input into the temperature database, the adaptive adjustment temperature value can be output, and the adjustment temperature value is the second adjustment temperature.
Step S408: and calculating a difference value to obtain second temperature information, wherein the difference value is the difference between the fixed temperature and the second adjusting temperature.
The temperature corresponding to the second temperature information is the temperature of the air bag after being cooled, and the calculation formula is T2=T0-T5Wherein, T5The second adjustment temperature.
Step S409: and updating the temperature corresponding to the second temperature information to be a new fixed temperature.
And updating the temperature corresponding to the second temperature information to be a new fixed temperature so as to facilitate the calculation of the temperature of the air bag after the temperature is increased or decreased.
Referring to fig. 5, the thermal diffusion detection method of the battery system further includes:
step S500: and acquiring the inflation duration information of the single operation of the air pump.
The time length corresponding to the inflation time length information is the operation time length of the air pump during single operation, and can be completed by any appliance capable of timing, which is a conventional technical means of a person skilled in the art and is not described in detail.
Step S501: and judging whether the time length corresponding to the inflation time length information reaches the preset allowable time length.
The permitted time length is the maximum time length which can be allowed by the gas pump and is set by the working personnel according to the actual situation, and is not described in detail; the purpose of the judgment is to know whether the running time of the air pump exceeds the allowable time so as to judge the state of the air bag.
Step S5011: and if the duration corresponding to the inflation duration information does not reach the allowable duration, outputting a normal inflation signal.
When the time length corresponding to the inflation time length information does not reach the allowable time length, the operation time length of the air pump does not exceed the allowable time length, the air bag can be inflated normally at the time, and a normal inflation signal is output to record the condition, so that the worker can know the condition conveniently.
Step S5012: and if the time length corresponding to the inflation time length information reaches the allowable time length, controlling the air pump to be closed and outputting an air bag damage signal.
When the time length corresponding to the inflation time length information reaches the allowable time length, the fact that the operation time length of the air pump exceeds the allowable time length is described, the air bag is not full at the time, the fact that the air bag is damaged possibly is described, the air pump is controlled to be closed to save energy, an air bag damage signal is output to enable a worker to know the situation, and the worker can conduct timing processing on the situation conveniently.
Referring to fig. 6, the thermal diffusion detection method of the battery system further includes:
step S600: and determining first temperature information with the highest corresponding temperature in all the first temperature information according to a preset sequencing rule, and determining the battery position information of the corresponding battery according to the first temperature information.
The sorting rule is a method capable of sorting the sizes, such as a bubbling method, and is a conventional technical means for those skilled in the art, and is not described in detail; the first temperature information with the highest corresponding temperature can be determined through the sorting rule, the first detection point can be determined according to the first temperature information, and then the battery position information of the corresponding battery can be determined through the position of the first detection point.
Step S601: and controlling the preset heat dissipation device to move to the position projection superposition position corresponding to the battery position information to dissipate heat of the battery, wherein the air outlet of each air bag is communicated with the heat dissipation device.
The heat dissipation device is a device capable of gathering and releasing wind power, and can be an air pipe, air outlets of all air bags are communicated with the heat dissipation device, so that air blown out of the air bags can be blown out through the heat dissipation device, and the movement of the heat dissipation device can be driven by a linear module or an air cylinder, so that the heat dissipation device is a conventional technical means of a person skilled in the art and is not described in detail; the batteries with the highest temperature in all the batteries can be further cooled through the movement of the cooling device, so that the stability of the batteries in the use process is improved, the waste of gas blown out by the air bag is reduced, and the energy is saved.
Referring to fig. 7, based on the same inventive concept, an embodiment of the present invention provides a thermal diffusion detection system of a battery system, including:
the acquisition module is used for acquiring first temperature information of the first detection point and second temperature information of the second detection point;
the processing module is connected with the acquisition module and the judgment module and used for storing and processing information;
the judging module is used for judging whether the temperature corresponding to the first temperature information is greater than the preset reference temperature or not;
if the judging module judges that the temperature corresponding to the first temperature information is not greater than the reference temperature, the processing module outputs a normal signal;
if the judging module judges that the temperature corresponding to the first temperature information is greater than the reference temperature, the processing module calculates a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information;
the judgment module judges whether the value corresponding to the actual temperature information is greater than the reference temperature;
if the judgment module judges that the value corresponding to the actual temperature information is larger than the reference temperature, the processing module outputs an abnormal signal;
if the judgment module judges that the value corresponding to the actual temperature information is not greater than the reference temperature, the processing module outputs a prompt signal;
the gear adjusting information module is used for adjusting the gear of the cooling fan, so that the gear of the cooling fan can be automatically adjusted according to the actual temperature, and the battery cooling effect is better;
the fire processing module is used for judging whether a fire occurs or not, so that the fire can be processed in time, and the safety of the test is improved;
the first temperature acquisition module is used for acquiring the temperature of the outer surface of the battery system after being heated;
the second temperature acquisition module is used for acquiring the temperature of the outer surface of the battery system after being cooled;
the air bag detection module is used for detecting whether the air bag is damaged or not so as to reduce the occurrence of useless blowing operation of the air pump;
and the heat dissipation module is used for dissipating heat of the position with the highest internal temperature of the battery system, so that the situation that the internal temperature of the battery system is too high is reduced.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
An embodiment of the present invention provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executes a thermal diffusion detection method of a battery system.
Computer storage media include, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Based on the same inventive concept, an embodiment of the present invention provides an intelligent terminal, which includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute a thermal diffusion detection method of a battery system.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. A thermal diffusion detection method for a battery system, comprising:
defining that the side wall of the battery system is provided with a plurality of first detection points and second detection points, wherein the first detection points correspond to the second detection points one by one, the first detection points are positions inside the battery system for detecting the internal temperature, and the second detection points are positions outside the battery system for detecting the external temperature;
acquiring first temperature information of a first detection point and second temperature information of a second detection point;
judging whether the temperature corresponding to the first temperature information is greater than a preset reference temperature or not;
if the temperature corresponding to the first temperature information is not greater than the reference temperature, outputting a normal signal;
if the temperature corresponding to the first temperature information is greater than the reference temperature, calculating a difference value to obtain actual temperature information, wherein the difference value is the difference between the temperature corresponding to the first temperature information and the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information;
judging whether the value corresponding to the actual temperature information is greater than the reference temperature or not;
if the value corresponding to the actual temperature information is larger than the reference temperature, outputting an abnormal signal;
and if the value corresponding to the actual temperature information is not greater than the reference temperature, outputting a prompt signal.
2. The thermal diffusion detection method of a battery system according to claim 1, characterized in that: also included is a method of dissipating heat, the method comprising:
matching the gear information stored in the preset gear database and the corresponding temperature information with the first temperature information to determine the current gear information of the cooling fan preset at the first detection point;
judging whether an abnormal signal exists or not;
if no abnormal signal exists, the cooling fan is controlled to adjust to the gear corresponding to the current gear information for cooling;
if the abnormal signal exists, controlling the cooling fan to adjust to the preset highest gear and outputting timing information;
judging whether a normal signal exists when the time corresponding to the timing information reaches the preset heat dissipation time;
if the time corresponding to the timing information reaches the heat dissipation time, a normal operation signal is output;
and if no normal signal exists when the time corresponding to the timing information reaches the heat dissipation time, outputting an alarm signal.
3. The thermal diffusion detection method of a battery system according to claim 2, characterized in that: further comprising:
defining the temperature corresponding to the first temperature information when the timing information starts to time as an initial temperature, and defining the temperature corresponding to the first temperature information when the time corresponding to the timing information reaches the preset detection time as a termination temperature;
acquiring difference temperature information, wherein the temperature corresponding to the difference temperature information is the difference between the ending temperature and the initial temperature;
calculating and acquiring a heating rate according to the difference temperature information and the detection time;
judging whether the temperature rise rate is greater than a preset safe rate or not;
if the heating rate is not greater than the safe rate, outputting a normal heating signal;
and if the temperature rise rate is greater than the safety rate, controlling the preset fire extinguishing device to operate on the battery opposite to the first detection point.
4. The thermal diffusion detection method of a battery system according to claim 1, characterized in that: the second temperature information acquisition method comprises the following steps:
defining a second detection point, presetting an air bag, arranging a gas one-way valve at a gas outlet of the air bag, wherein the gas flow direction of the gas one-way valve is from the inside of the air bag to the outside;
acquiring gas volume information of gas blown out by the airbag;
matching the adjustment temperature value and the corresponding gas volume information stored in the preset temperature database with the gas volume information of the airbag to determine a first adjustment temperature;
acquiring pressure information of a squeezing point which is preset on the outer side wall of the battery system and can be squeezed by the air bag;
judging whether the pressure value corresponding to the pressure information is consistent with a preset reference pressure value or not;
if the pressure value corresponding to the pressure information is consistent with the reference pressure value, outputting a positioning signal and calculating the sum of the first adjusting temperature and the preset fixed temperature to obtain second temperature information.
5. The thermal diffusion detection method of a battery system according to claim 4, characterized in that: if the pressure value corresponding to the pressure information is inconsistent with the reference pressure value, the method for acquiring the second temperature information comprises the following steps:
controlling a preset air pump to inflate the air bag until a positioning signal is obtained;
acquiring the inflation volume information of the gas filled into the airbag before the in-position signal of the air pump is generated;
calculating a difference value to obtain difference value volume information, wherein the difference value is the difference between the volume corresponding to the gas volume information and the volume corresponding to the inflation volume information, and updating the difference value volume information into new gas volume information;
determining a second adjustment temperature according to the adjustment temperature value stored in the temperature database and the matching of the corresponding gas volume information and the difference volume information;
calculating a difference value to obtain second temperature information, wherein the difference value is the difference between the fixed temperature and the second adjustment temperature;
and updating the temperature corresponding to the second temperature information to be a new fixed temperature.
6. The thermal diffusion detection method of a battery system according to claim 5, characterized in that: further comprising:
acquiring the inflation duration information of single operation of the air pump;
judging whether the time length corresponding to the inflation time length information reaches the preset allowable time length or not;
if the time length corresponding to the inflation time length information does not reach the allowable time length, outputting a normal inflation signal;
and if the time length corresponding to the inflation time length information reaches the allowable time length, controlling the air pump to be closed and outputting an air bag damage signal.
7. The thermal diffusion detection method of a battery system according to claim 6, characterized in that: further comprising:
determining first temperature information with the highest corresponding temperature in all the first temperature information according to a preset sequencing rule, and determining battery position information of the corresponding battery according to the first temperature information;
and controlling the preset heat dissipation device to move to the position projection superposition position corresponding to the battery position information to dissipate heat of the battery, wherein the air outlet of each air bag is communicated with the heat dissipation device.
8. A thermal diffusion detection system for a battery system, comprising:
the acquisition module is used for acquiring first temperature information of the first detection point and second temperature information of the second detection point;
the processing module is connected with the acquisition module and the judgment module and used for storing and processing information;
the judging module is used for judging whether the temperature corresponding to the first temperature information is greater than the preset reference temperature or not;
if the judging module judges that the temperature corresponding to the first temperature information is not greater than the reference temperature, the processing module outputs a normal signal;
if the judging module judges that the temperature corresponding to the first temperature information is greater than the reference temperature, the processing module calculates a difference value to obtain actual temperature information, wherein the difference value is the difference of the temperature corresponding to the first temperature information minus the conversion temperature, and the conversion temperature is the product of the preset conversion rate multiplied by the temperature corresponding to the second temperature information;
the judgment module judges whether the value corresponding to the actual temperature information is greater than the reference temperature;
if the judgment module judges that the value corresponding to the actual temperature information is larger than the reference temperature, the processing module outputs an abnormal signal;
and if the judgment module judges that the value corresponding to the actual temperature information is not greater than the reference temperature, the processing module outputs a prompt signal.
9. An intelligent terminal, comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 7.
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