CN113442725B - Power battery thermal runaway alarm method and system and vehicle - Google Patents
Power battery thermal runaway alarm method and system and vehicle Download PDFInfo
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- CN113442725B CN113442725B CN202110680109.4A CN202110680109A CN113442725B CN 113442725 B CN113442725 B CN 113442725B CN 202110680109 A CN202110680109 A CN 202110680109A CN 113442725 B CN113442725 B CN 113442725B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a power battery thermal runaway alarm method, a system and a vehicle, wherein the method comprises the following steps: (S1) detecting the current electric quantity of the battery cell; (S2) selecting n air pressure value points in the time period T according to the time sequence, wherein the n air pressure value points are respectively (T)1,P1)、(t2,P2)……(ti,Pi)……(tn,Pn) I is 1,2, … … n; if the difference value of any two adjacent air pressure value points meets the following relational expression: pi+1‑Pi≥ΔPiIf the temperature is not controlled, the atmospheric pressure alarm condition of thermal runaway is considered to be met; otherwise, the thermal runaway air pressure alarm condition is not satisfied; wherein, Δ PiThe air pressure difference value threshold value of the air pressure value of the (i + 1) th air pressure value point and the air pressure value of the ith air pressure value point is preset. According to the method, the automatic fitting of the air pressure change trend in a section of range can be realized through the collected multiple air pressure value points meeting the thermal runaway, and the accuracy, timeliness and robustness of thermal event alarming are improved.
Description
Technical Field
The invention relates to the technical field of power battery health, in particular to a power battery thermal runaway alarm method, a power battery thermal runaway alarm system and a vehicle.
Background
GB38031-2020 power storage battery safety requirements for electric vehicles require that a thermal event warning signal be provided 5min before a single cell thermal runaway could cause diffusion and hence danger to the passenger compartment. At present, most of technologies for monitoring the thermal safety state by using an air pressure sensor are used for reporting a thermal event, when an air pressure signal is diagnosed, a single fixed threshold point is generally adopted or compared with a certain single point in the previous period, when the fixed threshold is reached, thermal runaway occurs for a period of time, and the defects of untimely alarm response, false alarm, missing report, high requirement on maintaining the air tightness of a whole package and the like exist.
Disclosure of Invention
The invention aims to provide a thermal runaway alarm method, a thermal runaway alarm system and a vehicle for a power battery, which can realize automatic fitting of an air pressure change trend in a section of range through a plurality of collected air pressure value points meeting the thermal runaway, and improve the accuracy, timeliness and robustness of thermal event alarm.
In order to achieve the purpose, the invention provides a thermal runaway alarm method for a power battery, which comprises the following steps:
(S1) detecting the current electric quantity of the battery cell;
(S2) selecting n air pressure value points in the time sequence within the time period T, wherein the n air pressure value points are respectively (T)1,P1)、(t2,P2)……(ti,Pi)……(tn,Pn) I is 1,2, … … n; if any two adjacent air pressure valuesThe difference values of the points all satisfy the following relation: p isi+1-Pi≥ΔPiIf the temperature is not controlled, the atmospheric pressure alarm condition of thermal runaway is considered to be met; otherwise, the thermal runaway air pressure alarm condition is not satisfied;
wherein, Δ PiThe air pressure difference value threshold value of the air pressure value of the (i + 1) th air pressure value point and the air pressure value of the ith air pressure value point is preset.
Further, Δ PiThe formula of (1) is as follows:
ΔPi=ΔPi^×r×(1-s);
in the formula: delta PiThe pressure difference threshold value of the pressure value of the (i + 1) th pressure value point and the pressure value of the ith pressure value point is preset in the T time period at the state of 100% SOC of the electric quantity of the battery core; r is a trend change factor, 0<r<1; s is a measurement bias factor, 0<s<1;
The r of different battery cell electric quantities is different, and the r is determined by the ratio of the air pressure value at the Tth moment of the current battery cell electric quantity to the air pressure value at the Tth moment of 100% of the battery cell electric quantity;
and s is comprehensively determined according to the signal detection precision, the sealing deviation and the consistency deviation of the testing equipment.
Further, if the electric quantity of the battery cell is 50% of the SOC, r is 0.65; if the electric quantity of the battery cell is 60% SOC, r is 0.7; if the electric quantity of the battery cell is 70% SOC, r is 0.82; if the electric quantity of the battery core is 80% of SOC, r is 0.88; if the electric quantity of the battery cell is 90% SOC, r is 0.93.
Further, the method for selecting the non-first air pressure value point comprises the following steps: at the determined pressure value point (t)i,Pi) Then, t is addediThe latter air pressure values are chronologically related to PiTaking the first point satisfying the difference value of ≧ Δ P1 as (t)i+1,Pi+1)。
Further, at the selected pressure value point (t)1,P1) Then, the following selection steps are executed:
(D1) firstly, selecting a first air pressure value point in a T time period as an alternative air pressure value point (T)1,P1);
(D2) Will t1The subsequent air pressure value point is firstly according to timeThe rear sequence is respectively connected with the alternative air pressure value points (t)1,P1) Making difference, and respectively judging whether the air pressure difference value is greater than the air pressure difference value threshold value of corresponding calibration, if at least one air pressure difference value is greater than the air pressure difference value threshold value of corresponding calibration, then making said alternative air pressure value point (t)1,P1) As the finally selected air pressure value point (t)1,P1) (ii) a If the pressure value point (t)1,P1) If all the subsequent air pressure value points are less than or equal to the corresponding calibrated air pressure difference value threshold, then the operation is switched to the execution (D3);
(D3) selecting a current alternative air pressure value point (t)1,P1) The next air pressure value point is used as a new alternative air pressure value point (t)1,P1) Go to execute (D2).
Further, the value range of n is 3-5.
The invention also provides a power battery thermal runaway alarm system, which comprises:
the signal acquisition module is used for acquiring the electric quantity information and the air pressure value point of the battery cell;
the analysis module is used for calculating the electric quantity of the battery cell and analyzing whether an air pressure value point meeting a thermal runaway condition exists or not;
the alarm module is used for sending out an alarm prompt when the heat is out of control;
the signal acquisition module and the alarm module are respectively connected with the analysis module; the power battery thermal runaway alarm system can execute the steps of the battery thermal runaway alarm method.
The invention also discloses a vehicle which comprises the power battery thermal runaway alarm system.
Compared with the prior art, the invention has the following advantages:
according to the power battery thermal runaway alarm method, the system and the vehicle, the accuracy of thermal event alarm is improved, the air pressure change trend can be automatically fitted in a certain range (in a time period or within an air pressure difference threshold value range), real numerical values can be automatically captured, and diagnosis is more accurate; the timeliness of the thermal event alarm is improved, and the air pressure can be diagnosed at the initial stage of the air pressure change according to a strategy; the robustness of thermal runaway alarm is improved, the air pressure signal can be influenced by the accuracy, the acquisition accuracy, the interference and the like of the sensor, and the influence of the factors can be avoided to a greater extent by adopting a variation trend strategy.
Drawings
FIG. 1 is a flow chart of a power battery thermal runaway alarm method of the invention;
FIG. 2 is a schematic diagram of the air pressure value point signal fitting the trend of air pressure change according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, the embodiment discloses a power battery thermal runaway alarm method, which includes the following steps:
(S1) detecting the current electric quantity of the battery cell;
(S2) selecting n air pressure value points in the time sequence within the time period T, wherein the n air pressure value points are respectively (T)1,P1)、(t2,P2)……(ti,Pi)……(tn,Pn) I is 1,2, … … n; if the difference value of any two adjacent air pressure value points meets the following relational expression: pi+1-Pi≥ΔPiIf the temperature is not controlled, the atmospheric pressure alarm condition of thermal runaway is considered to be met; otherwise, the thermal runaway air pressure alarm condition is not satisfied;
wherein, Δ PiThe air pressure difference value threshold value of the air pressure value of the (i + 1) th air pressure value point and the air pressure value of the ith air pressure value point is preset. The calibrated air pressure difference threshold value can be a certain value or a certain value range, and the value range represents that the difference value is in the value range.
The determination of T is determined by selecting a proper time length, and generally selecting 0.2-2 times of the time length from the beginning of the change of the air pressure to the peak value of the air pressure as the preference; for example, if a test data has a time period from the start of the air pressure change to the peak of the air pressure of 30s, the selectable time period T may be one of 6s to 60s, such as 10 s.
In this embodiment, n is in the range of 3 to 5. To fit this trend, the pressure is mainly determined by the pressureAnd (4) building three dimensions of a value, an air pressure difference value threshold and time. For example, if the vehicle is out of control thermally, 4 air pressure value points in the air pressure trend can be captured by the method described above, and the 4 points can form a curve trend as shown in fig. 2, wherein P2-P1=ΔP1',P3-P2=ΔP2',P4-P3=ΔP3'。
In the present embodiment, Δ t1,Δt2,…,Δtn-1The time intervals are not equal, where Δ t1=t2-t1,Δt2=t3-t2,…,Δtn-1=tn-tn-1. In certain embodiments, Δ t1,Δt2,…,Δtn-1Each time interval is equal. When the time intervals are unequal, automatic fitting in a certain range can be realized.
In the present embodiment, Δ PiThe formula of (1) is:
ΔPi=ΔPi^×r×(1-s);
in the formula: delta PiThe pressure difference value threshold value of the pressure value of the (i + 1) th pressure value point and the pressure value of the ith pressure value point is preset in the T time period when the battery core electric quantity is 100% SOC; r is a trend change factor, 0<r<1; s is a measurement bias factor, 0<s<1;
The r of different battery cell electric quantities is different, and the r is determined by the ratio of the air pressure value at the Tth moment of the current battery cell electric quantity to the air pressure value at the Tth moment of 100% of the battery cell electric quantity;
and s is comprehensively determined according to the signal detection precision, the sealing deviation and the consistency deviation of the testing equipment.
When the preset air pressure difference value threshold values are all positive values, the rising trend of the air pressure can be fitted; when the preset air pressure difference value thresholds are all negative values, the descending trend of the air pressure can be fitted; if the preset air pressure difference value threshold is set to be positive and negative crossed, the situation that the air pressure fluctuates up and down can be fitted.
Due to the air pressure difference value threshold value delta Pi(ΔP1、ΔP2、ΔP3… …) is a markAnd quantifying, if the calibration has deviation and has certain influence on the use of alarming, the calibration is mainly influenced by two aspects, namely, different electric core systems, electric core capacity and electric quantity of the electric core influence the air pressure change trend, and measurement deviation needs to be considered for air pressure change data measured in a certain test, such as signal detection precision, sealing deviation of test equipment, consistency deviation and the like. Therefore, two influencing factors are taken for calibration, namely a trend change factor r and a measurement deviation factor s (r and s are independent). For a certain type of battery cell, the battery cell system and the battery cell capacity are determined, and the air pressure change is mainly influenced by the electric quantity. And selecting the electric cores under different electric quantities to perform thermal runaway test by taking the electric quantity of the 100% SOC as a reference, so as to obtain air pressure values under different electric quantities. Taking the starting change of the air pressure as the starting point of a time window T, and obtaining an air pressure value at the Tth moment; obtaining the air pressure values at the Tth moment under different electric quantities in the air pressure values under different electric quantities, and obtaining the ratio of the corresponding air pressure values to the air pressure change value at the Tth moment under the condition that the electric quantity is 100%, namely obtaining the trend change factor r under different electric quantities; each ratio can be configured in software, and corresponding ratio r can be set in different electric quantity ranges and used for thermal runaway judgment after configuration. For the measurement deviation factor s, a measurement deviation factor s can be comprehensively determined according to the signal detection precision, the sealing deviation of the test equipment, the consistency deviation and the like, and a calibrated air pressure difference value threshold value can be obtained by using the measurement deviation factor s, namely the air pressure value at the T-th moment is multiplied by (1-s).
In this embodiment, if the cell electric quantity is 50% SOC, r is 0.65; if the electric quantity of the battery cell is 60% SOC, r is 0.7; if the electric quantity of the battery cell is 70% SOC, r is 0.82; if the electric quantity of the battery cell is 80% SOC, r is 0.88; if the electric quantity of the battery cell is 90% SOC, r is 0.93.
Referring to fig. 1, a test may be performed at 100% SOC to obtain a piece of data, and a suitable time interval may exist (T) within a time period T (e.g. 20s)1,P1)、(t2,P2)、(t3,P3)、(t3,P3) Four points are (10, 100), (12, 101), (15, 103) and (25, 110), and the four points are firstlyAfter making difference, respectively satisfy Δ P1^=1kPa、ΔP2^=1.5kPa、ΔP2And the three air pressure difference threshold values are parameters preliminarily determined according to the air pressure value under 100% of electric quantity, are preliminarily used as parameters in the strategy, and need to be further calibrated.
The comprehensive factors can be considered through experiments, and a measurement deviation factor s is obtained, wherein s is 0.2; the air pressure values at the T-th time points in the case of 50%, 60%, 70%, 80%, and 90% of the electricity amount can be obtained through experiments, and the ratio of the air pressure values at the T-th time points is 100%, respectively, to obtain the trend change factors r for each electricity amount, such as 0.65, 0.7, 0.82, 0.88, and 0.93, respectively). Then, the air pressure difference value thresholds of different electric quantities are respectively calibrated, under 50% of electric quantity: delta P1=1*0.65*(1-0.2)=0.52kPa,ΔP2=1.5*0.65*(1-0.2)=0.78kPa,ΔP32.08kPa (1-0.2) ═ 4 × 0.65 ═ 2.08 kPa; under 60% of electricity: delta P1=1*0.7*(1-0.2)=0.56kPa,ΔP2=1.5*0.7*(1-0.2)=0.84kPa,ΔP 34 × 0.7 × 1-0.2 — 2.24kPa, and so on.
In this embodiment, the method for selecting the non-first pressure value point is as follows: at the determined pressure value point (t)i,Pi) Then, t isiThe latter pressure values are chronologically successive with PiTaking the first point satisfying the difference value of ≧ Δ P1 as (t)i+1,Pi+1)。
In this embodiment, the air pressure value point (t) is selected1,P1) Then, the following selection steps are executed:
(D1) firstly, selecting a first air pressure value point in a T time period as an alternative air pressure value point (T)1,P1);
(D2) Will t1The subsequent air pressure value points are respectively connected with the alternative air pressure value points (t) according to the time sequence1,P1) Making difference, and judging whether the air pressure difference value is greater than the corresponding calibrated air pressure difference value threshold value or not, if at least one air pressure difference value is greater than the corresponding calibrated air pressure difference value threshold value, then the alternative air pressure value point (t) is pointed out1,P1) As the finally selected pressure value point (t)1,P1) (ii) a If the pressure value point (t)1,P1) If all the subsequent air pressure value points are less than or equal to the corresponding calibrated air pressure difference value threshold, then the operation is switched to the execution (D3);
(D3) selecting a current alternative air pressure value point (t)1,P1) The next air pressure value point is used as a new alternative air pressure value point (t)1,P1) Go to execute (D2).
This embodiment also discloses a power battery thermal runaway alarm system, includes:
the signal acquisition module is used for acquiring the electric quantity information and the air pressure value point of the battery cell;
the analysis module is used for calculating the electric quantity of the battery cell and analyzing whether an air pressure value point meeting a thermal runaway condition exists or not;
the alarm module is used for sending out an alarm prompt when the heat is out of control;
the signal acquisition module and the alarm module are respectively connected with the analysis module; the power battery thermal runaway alarm system can execute the steps of the battery thermal runaway alarm method.
The embodiment also discloses a vehicle which comprises the power battery thermal runaway alarm system.
According to the power battery thermal runaway alarm method, the system and the vehicle, the accuracy of thermal event alarm is improved, the air pressure change trend can be automatically fitted in a certain range (in a time period or within an air pressure difference threshold value range), real numerical values can be automatically captured, and diagnosis is more accurate; the timeliness of the thermal event alarm is improved, and the air pressure can be diagnosed at the initial stage of the air pressure change according to a strategy; the robustness of thermal runaway alarm is improved, the air pressure signal can be influenced by the accuracy, the acquisition accuracy, the interference and the like of the sensor, and the influence of the factors can be avoided to a greater extent by adopting a variation trend strategy.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A power battery thermal runaway alarm method is characterized by comprising the following steps:
(S1) detecting the current electric quantity of the battery cell;
(S2) selecting n air pressure value points in the time sequence within the time period T, wherein the n air pressure value points are respectively (T)1,P1)、(t2,P2)……(ti,Pi)……(tn,Pn) I is 1,2, … … n; if the difference value of any two adjacent air pressure value points meets the following relational expression: pi+1-Pi≥ΔPiIf the temperature is not controlled, the atmospheric pressure alarm condition of thermal runaway is considered to be met; otherwise, the thermal runaway air pressure alarm condition is not satisfied;
wherein, Δ PiAnd presetting an air pressure difference value threshold value of the air pressure value of the (i + 1) th air pressure value point and the air pressure value of the ith air pressure value point under the current electric quantity of the electric core.
2. The power battery thermal runaway alarm method of claim 1, wherein Δ PiThe formula of (1) is:
ΔPi=ΔPi^×r×(1-s);
in the formula: delta PiThe pressure difference threshold value of the pressure value of the (i + 1) th pressure value point and the pressure value of the ith pressure value point is preset in the T time period at the state of 100% SOC of the electric quantity of the battery core; r is a trend change factor, 0<r<1; s is a measurement bias factor, 0<s<1;
The r of different battery cell electric quantities is different, and the r is determined by the ratio of the air pressure value at the Tth moment of the current battery cell electric quantity to the air pressure value at the Tth moment of 100% of the battery cell electric quantity;
and s is comprehensively determined according to the signal detection precision, the sealing deviation and the consistency deviation of the testing equipment.
3. The warning method for the thermal runaway of the power battery according to claim 2, wherein if the electric quantity of the battery cell is 50% SOC, r is 0.65; if the electric quantity of the battery cell is 60% SOC, r is 0.7; if the electric quantity of the battery cell is 70% SOC, r is 0.82; if the electric quantity of the battery cell is 80% SOC, r is 0.88; if the electric quantity of the battery cell is 90% SOC, r is 0.93.
4. The power battery thermal runaway alarm method according to claim 1,2 or 3, wherein the method for selecting the non-first air pressure value point is as follows: at the determined pressure value point (t)i,Pi) Then, t is addediThe latter pressure values are chronologically successive with PiTaking the first point satisfying the difference value of ≧ Δ P1 as (t)i+1,Pi+1)。
5. The power battery thermal runaway alarm method of claim 4, wherein at a selected air pressure value point (t)1,P1) Then, the following selection steps are executed:
(D1) firstly, selecting a first air pressure value point in a T time period as an alternative air pressure value point (T)1,P1);
(D2) Will t1The subsequent air pressure value points are respectively connected with the alternative air pressure value points (t) according to the time sequence1,P1) Making difference, and judging whether the air pressure difference value is greater than the corresponding calibrated air pressure difference value threshold value or not, if at least one air pressure difference value is greater than the corresponding calibrated air pressure difference value threshold value, then the alternative air pressure value point (t) is pointed out1,P1) As the finally selected pressure value point (t)1,P1) (ii) a If the pressure value point (t)1,P1) If all the subsequent air pressure value points are less than or equal to the corresponding calibrated air pressure difference value threshold, then the operation is switched to the execution (D3);
(D3) selecting a current alternative air pressure value point (t)1,P1) The next air pressure value point is used as a new alternative air pressure value point (t)1,P1) Go to execute (D2).
6. The power battery thermal runaway alarm method according to claim 1,2, 3 or 5, wherein the value of n ranges from 3 to 5.
7. A power battery thermal runaway alarm system is characterized by comprising:
the signal acquisition module is used for acquiring the electric quantity information and the air pressure value point of the battery cell;
the analysis module is used for calculating the electric quantity of the battery cell and analyzing whether an air pressure value point meeting a thermal runaway condition exists or not;
the alarm module is used for sending out an alarm prompt when the heat is out of control;
the signal acquisition module and the alarm module are respectively connected with the analysis module; the power battery thermal runaway alarm system can execute the steps of the battery thermal runaway alarm method according to any one of claims 1 to 6.
8. A vehicle characterized by comprising a power battery thermal runaway warning system as claimed in claim 7.
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