CN117480069A

CN117480069A - Method and apparatus for thermal runaway detection

Info

Publication number: CN117480069A
Application number: CN202280038531.2A
Authority: CN
Inventors: 林本锋
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2024-01-30
Also published as: WO2023225974A1

Abstract

A thermal runaway detection method can effectively improve the safety performance of a battery replacement cabinet (13) and a battery replacement station (11). The battery management unit BMU (131) determines whether thermal runaway occurs in the battery changing cabinet (13) according to battery parameters of the battery (142) in the battery changing cabinet (13), wherein the battery parameters comprise the temperature of the battery monomer in the battery (142) and/or the voltage of the battery monomer; if the thermal runaway of the power exchange cabinet (13) is determined, the BMU (131) sends fault information to a station control system (151) of the power exchange station (11), and the fault information is used for indicating the thermal runaway of the power exchange cabinet (13).

Description

Method and apparatus for thermal runaway detection

Technical Field

The present application relates to the field of battery technologies, and in particular, to a method and apparatus for thermal runaway detection.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry. In this case, the electric vehicle is an important component for sustainable development of the automobile industry due to the advantage of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor for development.

In addition to improving the performance of batteries, safety issues are also a non-negligible issue in the development of battery technology. If the safety problem of the battery is not guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem to be solved in the battery technology.

Disclosure of Invention

The embodiment of the application provides a method and a device for detecting thermal runaway, which can effectively improve the safety performance of a battery cabinet and a battery exchange station.

In a first aspect, a method of thermal runaway detection is provided, the method comprising: the battery management unit BMU determines whether the battery cabinet is out of control or not according to battery parameters of a battery in the battery cabinet, wherein the battery parameters comprise the temperature of a battery monomer in the battery and/or the voltage of the battery monomer; if the battery cabinet is determined to be out of control, the BMU sends fault information to a station control system of the power exchange station, wherein the fault information is used for indicating the battery cabinet to be out of control.

According to the embodiment of the application, the BMU determines whether the battery cabinet has thermal runaway according to the battery parameters of the battery in the battery cabinet. If the thermal runaway is determined to occur, the thermal runaway of the battery cabinet is indicated to the station control system, so that the station control system can timely perform thermal runaway treatment on the battery cabinet, the occurrence of auxiliary thermal runaway of the battery is avoided, and the safety performance of the auxiliary battery and the battery exchange station is effectively improved. Further, the BMU determines whether the battery cabinet is out of control according to the voltage and/or the temperature of the battery cell, and the voltage and/or the temperature of the battery cell is one of the parameters which can best show whether the battery cabinet is out of control, so that whether the battery cabinet is out of control according to the voltage and/or the temperature of the battery cell is determined, and the accuracy is high.

In some possible implementations, the BMU sends fault information to a station control system of the power exchange station, including: and the BMU sends the fault information to the station control system through a charger for charging the battery changing cabinet.

In general, the BMU communicates through a CAN communication manner, but the station control system may not support the CAN communication manner, so in the above technical solution, the BMU sends fault information to the station control system through the charger for charging the battery replacement cabinet, so that the BMU and the charger CAN communicate through the CAN communication manner, and the charger and the station control system CAN communicate through the communication manners supported by the station control system and the charger, thereby advantageously ensuring normal communication between the BMU and the station control system.

In some possible implementations, the method further includes: the BMU receives the battery parameters sent by a cell monitoring unit CSC in the battery.

In the above technical solution, the CSC is itself used for collecting the temperature and/or voltage of the battery cell, and the collected battery parameters, that is, the temperature and/or voltage of the battery cell and the actual temperature and the actual voltage of the battery cell are close to each other. In this way, the BMU determines whether the thermal runaway has occurred in the battery cabinet through the battery parameters transmitted by the received CSC, and the accuracy of determining whether the thermal runaway has occurred in the battery cabinet can be greatly improved.

In some possible implementations, the battery parameters include at least one of the following: a minimum voltage among voltages of the battery cells; the highest temperature among the temperatures of the battery cells; the rate of rise of the temperature of the battery cell over time; the temperature difference between the highest temperature and the lowest temperature among the temperatures of the battery cells.

According to the technical scheme, when the battery cabinet is in thermal runaway, at least one of the minimum voltage in the voltage of the battery cells in the battery cabinet, the highest temperature in the temperature of the battery cells, the rising rate of the temperature of the battery cells along with time and the temperature difference between the highest temperature and the lowest temperature in the temperature of the battery cells can be abnormal along with the occurrence of the thermal runaway, so that whether the battery cabinet is in thermal runaway or not is determined according to at least one of the battery parameters, and the accuracy of determining whether the battery cabinet is in thermal runaway or not is high.

In some possible implementations, the battery management unit BMU determines, according to battery parameters of the battery in the battery closet, whether the thermal runaway occurs in the battery closet, including: the BMU determining that thermal runaway of the battery compartment has occurred if the battery parameter meets at least one of the following fault conditions;

The fault conditions include the following: the duration that the minimum voltage is smaller than the voltage threshold is above a first duration threshold, and the duration that the maximum temperature is greater than the first temperature threshold is above a second duration threshold; the duration for which the minimum voltage is less than the voltage threshold is above the first duration threshold, and the duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second duration threshold; the duration that the minimum voltage is less than the voltage threshold is above the first duration threshold, the duration that the temperature difference is greater than a second temperature threshold is above the second duration threshold, and the duration that the maximum temperature is greater than a third temperature threshold is above the second duration threshold; the time duration during which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second time duration threshold, and the time duration during which the maximum temperature is greater than the first temperature threshold is above the second time duration threshold; the time duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second time duration threshold, the time duration for which the temperature difference is greater than the second temperature threshold is above the second time duration threshold, and the time duration for which the maximum temperature is greater than the third temperature threshold is above the second time duration threshold; the voltage of the battery monomer cannot be obtained, and the duration of time when the highest temperature is larger than the first temperature threshold is larger than the second duration threshold; the voltage of the battery monomer cannot be obtained, and the duration of time when the rate of rise of the temperature along with time is greater than the rate of rise threshold is above the second duration threshold; the voltage of the battery monomer cannot be obtained, the duration of time when the temperature difference is larger than the second temperature threshold is larger than the second duration threshold, and the duration of time when the highest temperature is larger than the third temperature threshold is larger than the second duration threshold; in a preceding target time when the battery parameter is not updated, a duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above a third duration threshold; in the front target moment when the battery parameter is not updated, the duration that the highest temperature is greater than a first temperature threshold is more than the second duration threshold, and the duration that the battery parameter is not updated is more than the third duration threshold; at a pre-target time when the battery parameter is not updated, a duration for which the temperature difference is greater than the second temperature threshold is above the second duration threshold, a duration for which the maximum temperature is greater than the third temperature threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above the third duration threshold.

According to the technical scheme, in the comparison process of the battery parameters and the threshold value, whether the battery cabinet is in thermal runaway is determined after the comparison result lasts for a certain period of time, so that the problem that the battery parameters reach the thermal runaway condition only at a moment, the thermal runaway does not actually occur, or the battery cabinet is in thermal runaway at a certain period of time, but then automatically returns to a normal state is avoided.

In some possible implementations, the voltage threshold is 1.7V; and/or the first time length threshold is 300ms; and/or the second duration threshold is 3000ms; and/or the third duration threshold is 12s; and/or the first temperature threshold is 78 ℃; and/or the second temperature threshold is 30 ℃; and/or the third temperature threshold is 60 ℃; and/or the increase rate threshold is 3 ℃/3s; and/or the target time is 20s.

The parameters mentioned in the technical scheme, such as 300ms, 78 ℃ and the like, are values obtained by combining experience on the basis of practice, the accuracy is high, the problem that the battery cabinet which is not subjected to thermal runaway is mistakenly determined to be subjected to thermal runaway, or the battery cabinet which is subjected to thermal runaway is mistakenly determined to be not subjected to thermal runaway is avoided, and the accuracy for determining whether the battery cabinet is subjected to thermal runaway can be greatly improved.

In some possible implementations, the battery cabinet includes a plurality of the batteries, the method further including: the BMU determines a target battery with thermal runaway according to battery parameters of each battery in a plurality of batteries; the BMU outputs the identification information of the target battery.

According to the technical scheme, whether the battery cabinet is in thermal runaway or not is determined, the specific battery in thermal runaway is determined, the identification information of the battery in thermal runaway is output, equipment (such as a station control system) receiving the identification information conveniently performs subsequent operation on the battery in thermal runaway, for example, the battery in thermal runaway is displayed on a display screen of a power exchange station, so that a worker only exchanges the battery in thermal runaway without exchanging the whole battery cabinet, and battery cost is saved.

In some possible implementations, the method is applied to a heavy truck.

In a second aspect, a method for thermal runaway detection is provided, the method comprising: the station control system of the power exchange station receives fault information sent by a battery management unit BMU, wherein the fault information is used for indicating that a thermal runaway occurs in a power exchange cabinet in the power exchange station; and the station control system carries out thermal runaway treatment on the power exchange cabinet according to the fault information.

In some possible implementations, the station control system of the power exchange station receives fault information sent by the battery management unit BMU, including: and the station control system receives the fault information through a charger for charging the battery changing cabinet.

In some possible implementations, the station control system performs thermal runaway processing on the power conversion cabinet according to the fault information, including: and the station control system stops the charging of the battery charger to the battery changing cabinet according to the fault information.

In some possible implementations, the method further includes: and the station control system disconnects a charging contactor between the battery changing cabinet and the charger.

In some possible implementations, the method is applied to a heavy truck.

In a third aspect, there is provided an apparatus for thermal runaway detection for performing the method of the first aspect or implementations thereof. In particular, the apparatus comprises functional modules for performing the method of the first aspect or implementations thereof described above.

In a fourth aspect, there is provided an apparatus for thermal runaway detection for performing the method of the second aspect or implementations thereof described above. In particular, the apparatus comprises functional modules for performing the method of the second aspect described above or in various implementations thereof.

In a fifth aspect, there is provided an apparatus for thermal runaway detection, comprising a processor and a memory, the memory being for storing a computer program, the processor being for invoking the computer program to perform the method of the first or second aspect or implementations thereof.

In a sixth aspect, a computer readable storage medium is provided for storing a computer program for causing a computer to perform the method of any one of the above first to second aspects or implementations thereof.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.

Fig. 2 is a schematic flow chart of a method of thermal runaway detection provided in an embodiment of the present application.

FIG. 3 is a schematic flow chart of another method of thermal runaway detection provided by an embodiment of the present application.

Fig. 4 is a schematic block diagram of an apparatus for thermal runaway detection provided in an embodiment of the present application.

Fig. 5 is a schematic block diagram of another apparatus for thermal runaway detection provided by an embodiment of the present application.

Fig. 6 is a schematic block diagram of an apparatus for providing yet another thermal runaway detection in accordance with an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

With the development of new energy technology, the application field of the battery is more and more wide, for example, the battery can be used as a power source to provide power for electric equipment, and the use of non-renewable resources is reduced. Under the condition that the electric quantity of the battery in the electric equipment is insufficient to support the electric equipment to continue running, the electric equipment can be charged by using charging equipment such as a charging pile and the like, namely, the battery in the electric equipment is charged, so that the battery can be circularly used in charging and discharging. However, the battery needs to be charged for a long time, so that the continuous use of the electric equipment is limited.

In order to improve the endurance utilization rate of electric equipment, a power conversion technology is generated. The power conversion technology adopts a mode of 'vehicle-electricity separation', and can provide battery replacement service for electric equipment through a power conversion station, namely, the battery can be quickly taken down or installed from the electric equipment. The battery taken down from the electric equipment can be put into a battery-changing cabinet of the battery-changing station for charging so as to be ready for battery-changing for the electric equipment which subsequently enters the battery-changing station.

When the battery taken down from the electric equipment is charged by the battery changing cabinet, the battery is easy to be out of control due to the fact that the temperature of the battery possibly rises or other reasons in the charging process. Once thermal runaway occurs, combustion, explosion, etc. of the battery may occur, thereby seriously affecting the safety performance of the battery.

In view of this, the embodiment of the application proposes a method for thermal runaway detection, where a battery management unit (battery management unit, BMU) determines whether thermal runaway has occurred in a battery compartment according to battery parameters of a battery in the battery compartment. If the thermal runaway is determined to occur, the thermal runaway is indicated to the station control system of the power exchange station, so that the station control system can timely perform thermal runaway treatment on the battery cabinet, the thermal runaway of the battery cabinet is avoided, and the safety performance of the battery cabinet and the power exchange station is effectively improved.

Fig. 1 shows a schematic diagram of an application scenario of a method for thermal runaway detection according to an embodiment of the present application. As shown in fig. 1, the application scenario of the thermal runaway detection method may involve a power exchange station 11, a powered device 12, and a battery.

The power exchange station 11 may refer to a location that provides power exchange services for electrical consumers. For example, the power exchange station 11 may be a stationary location, or the power exchange station 11 may be a movable location such as a mobile power exchange vehicle, without limitation.

Powered device 12 may be removably coupled to a battery. In some examples, powered device 12 may be a car, heavy truck, or the like, powered by a power battery.

The battery may include a battery disposed within powered device 12 and a battery located in power exchange station 11 for exchanging power. For ease of distinction, as shown in fig. 1, the battery to be replaced in powered device 12 is designated as battery 141, and the battery for use in the replacement of power in the power station is designated as battery 142. The battery may be a lithium ion battery, a lithium metal battery, a lead-acid battery, a nickel-metal-hydride battery, a lithium-sulfur battery, a lithium-air battery, a sodium ion battery, or the like, and is not particularly limited in the embodiments of the present application. The battery in the embodiments of the present application may be a battery pack on a battery scale. It should be appreciated that in other scenarios, the battery may be a cell/battery unit or a battery module.

The battery can be used as a power source to supply power for a motor of electric equipment and can also be used for supplying power for other electric equipment in the electric equipment, for example, the battery can also be used for supplying power for an in-car air conditioner, an in-car player and the like.

After the electric consumer 12 with the battery 141 installed is driven into the power exchange station 11, the power exchange station 11 removes the battery 141 from the electric consumer 12 by the power exchange device, and removes the battery 142 from the power exchange station 11, and then installs the battery 142 onto the electric consumer vehicle 12. The consumer 12 with the battery 142 installed may then be driven off the power exchange station 11. Through the power conversion technology, electric equipment can be rapidly supplemented with energy in a few minutes or even tens of seconds, and user experience is improved.

As shown in fig. 1, a power exchange cabinet 13 may be provided in the power exchange station 11. The battery exchange cabinet 13 includes a BMU 131. The battery changing cabinet 13 may be further provided with a plurality of charging bins 132, and batteries for changing the power may be placed in the charging bins 132.

The power exchange station 11 may also be provided with management means correspondingly. The management device may be a centralized structure or a distributed structure, and is not limited thereto. The management device may be provided inside the power exchange station 11 or may be provided outside the power exchange station 11. In the case of a distributed structure of the management device, the management device may also be arranged partly inside the station 11 and partly outside the station 11. For example, as shown in fig. 1, the management device may include a station control system 151 inside the power exchange station 11 and a cloud server 152 outside the power exchange station 11, which is not limited herein.

Alternatively, the BMU 131 may communicate with other units, modules, devices, etc. through wired or wireless means. The station control system 151 may communicate with other units, modules, devices, etc. through wired or wireless means. The wired communication method may include, for example, a controller area network (control area network, CAN) communication method and a daisy chain (daisy chain) communication method. The wireless communication method may include, for example, various methods such as bluetooth communication, wireless fidelity (wireless fidelity, WIFI) communication, zigBee communication, and the like, and is not limited thereto.

For example, station control system 151 may communicate with BMU 131 to obtain information regarding battery 141 on powered device 12 or battery 142 within charging bin 133. For another example, station control system 151 may also communicate with cloud server 152 to obtain information about battery 141 on powered device 12 or battery 142 in charging bin 133.

Fig. 2 shows a schematic flow chart of a method 200 of thermal runaway detection in an embodiment of the present application. It should be appreciated that the power stations, BMUs, power cabinets and the station control system in method 200 may be power stations 11, BMUs 131, power cabinets 13 and station control system 151, respectively, of fig. 1. The method 200 may include at least some of the following.

S210: the BMU determines whether thermal runaway has occurred in the battery compartment based on battery parameters of the battery in the battery compartment, which may include the temperature of the battery cells in the battery and/or the voltage of the battery cells.

S220: if the battery cabinet is determined to be out of control, the BMU sends fault information to a station control system of the power exchange station, wherein the fault information is used for indicating the battery cabinet to be out of control.

The electric equipment can be an electric vehicle, a ship, a spacecraft or the like. The electric vehicle may be, for example, a heavy truck such as a sprinkler, fire truck, earth-moving vehicle, truck, or the like. It was analyzed that heavy trucks had an overall market hold of approximately 700 tens of thousands, with over 70% of heavy trucks operating for 24 hours (two shifts or three shifts). In this case, the method 100 is applied to a heavy truck, and further, the safety performance of the heavy truck can be improved, and the occurrence of safety accidents can be prevented.

The BMU is arranged on the battery cabinet, can be used for monitoring physical parameters of the battery, such as voltage, temperature and the like in real time, and can also be used for balancing management and the like.

Optionally, before S110, the method 100 may further include: the BMU acquires battery parameters.

The battery cabinet may include at least one battery, which may include one or more cell monitoring units (cell supervision circuit, CSC), which may collect battery parameters of the battery, such as temperature and/or voltage of battery cells in the battery. Wherein one CSC may collect the temperature and/or voltage of multiple battery cells. After the CSC collects, the CSC may send the collected temperatures and/or voltages of the plurality of battery cells to the BMU. I.e., the BMU may receive the battery parameters sent by the CSC to obtain the battery parameters.

The CSC and the BMU may communicate via wire or wirelessly. Such as by CAN communication or daisy chain communication.

The CSC may periodically collect battery parameters. Such as collecting battery parameters every 5 ms. Alternatively, the CSC may also acquire battery parameters aperiodically. For example, the time between the first and second battery parameter acquisition is 5ms, and the time between the second and third battery parameter acquisition is 8ms.

Optionally, the battery parameters may include at least one of the following: the minimum voltage among the voltages of the battery cells, the highest temperature among the temperatures of the battery cells, the rate of rise of the temperatures of the battery cells over time, and the temperature difference between the highest temperature and the lowest temperature among the temperatures of the battery cells.

According to the technical scheme, when the battery cabinet is in thermal runaway, at least one of the minimum voltage in the voltage of the battery monomer, the highest temperature in the temperature of the battery monomer, the rising rate of the temperature of the battery monomer along with time and the temperature difference between the highest temperature and the lowest temperature in the temperature of the battery monomer can be abnormal along with the occurrence of the thermal runaway, so that whether the battery cabinet is in thermal runaway or not is determined according to at least one of the battery parameters, and the accuracy of determining whether the battery cabinet is in thermal runaway or not is high.

In this case, S110 may specifically include: the BMU may determine that thermal runaway of the battery compartment has occurred in the event that the battery parameters meet at least one of the following fault conditions.

The fault condition may include, among others:

(a) The duration for which the minimum voltage is less than the voltage threshold is above a first duration threshold, and the duration for which the maximum temperature is greater than the first temperature threshold is above a second duration threshold;

(b) The duration for which the minimum voltage is less than the voltage threshold is above a first duration threshold, and the duration for which the rate of rise of temperature over time is greater than the rate of rise threshold is above a second duration threshold;

(c) The duration of the minimum voltage being less than the voltage threshold is above a first duration threshold, the duration of the temperature difference being greater than a second temperature threshold is above a second duration threshold, and the duration of the maximum temperature being greater than a third temperature threshold is above a second duration threshold;

(d) The time duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above a second time duration threshold, and the time duration for which the maximum temperature is greater than the first temperature threshold is above the second time duration threshold;

(e) The time duration that the temperature rise rate with time is greater than the rise rate threshold is above a second time duration threshold, the time duration that the temperature difference is greater than the second temperature threshold is above the second time duration threshold, and the time duration that the highest temperature is greater than the third temperature threshold is above the second time duration threshold;

(f) The voltage of the battery monomer cannot be obtained, and the duration of time when the highest temperature is higher than the first temperature threshold is higher than the second duration threshold;

(g) The voltage of the battery monomer cannot be obtained, and the duration of time when the rate of rise of the temperature along with time is greater than the rate of rise threshold is above a second duration threshold;

(h) The voltage of the battery monomer cannot be obtained, the duration of the temperature difference being greater than the second temperature threshold is greater than the second duration threshold, and the duration of the highest temperature being greater than the third temperature threshold is greater than the second duration threshold;

(i) In the front target moment when the battery parameter is not updated, the duration that the rising rate of the temperature along with time is larger than the rising rate threshold value is more than a second duration threshold value, and the duration that the battery parameter is not updated is more than a third duration threshold value;

(j) In the front target moment when the battery parameter is not updated, the duration that the highest temperature is greater than the first temperature threshold is more than the second duration threshold, and the duration that the battery parameter is not updated is more than the third duration threshold;

(k) At a pre-target time when the battery parameter is not updated, a duration for which the temperature difference is greater than the second temperature threshold is above the second duration threshold, a duration for which the highest temperature is greater than the third temperature threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above the third duration threshold.

The voltage of the battery cell that cannot be obtained may be, for example, a disconnection fault of the battery cell voltage sampling line, and/or the obtained voltage of the battery cell is an invalid value.

According to the technical scheme, in the comparison process of the battery parameters and the threshold value, whether the battery cabinet is in thermal runaway is determined after the comparison result lasts for a certain period of time, so that the problem that the battery parameters reach the thermal runaway condition only at a moment, the thermal runaway does not actually occur, or the battery cabinet is in thermal runaway for a certain period of time, but then the battery cabinet is automatically restored to the normal state is avoided.

As an example, the voltage threshold may be 1.7V; and/or

The first time length threshold may be 300ms; and/or

The second duration threshold may be 3000ms; and/or

The third duration threshold may be 12s; and/or

The first temperature threshold may be 78 ℃; and/or

The second temperature threshold may be 30 ℃; and/or

The third temperature threshold may be 60 ℃; and/or

The rate of rise threshold may be 3 ℃/3s; and/or

The target time may be 20s.

The time length threshold is 300ms, the second time length threshold is 3000ms, the first temperature threshold is 78 ℃, the second temperature threshold is 30 ℃, the third temperature threshold is 60 ℃, the rise rate threshold is 3 ℃/3s, and the target time is 20s, the fault condition can be:

(a) Minimum voltage Vmin <1.7V (300 ms) & maximum temperature Tmax >78 ℃ (3000 ms);

(b) Vmin <1.7V (300 ms) & temperature rise dT/dT >3 ℃/3s (3000 ms);

(c) Vmin <1.7V (300 ms) & temperature difference (Tmax-Tmin) >30 ℃ & Tmax >60 ℃ (3000 ms);

(d)dT/dt>3℃/3s(3000ms)&&Tmax>78℃(3000ms)；

(e) dT/dT >3 ℃/3s (3000 ms) & temperature difference (Tmax-Tmin) >30 ℃ & Tmax >60 ℃ (3000 ms);

(f) The voltage & & Tmax >78 ℃ (3000 ms) of the battery cell cannot be obtained;

(g) The voltage & & dT/dT >3 ℃/3s (3000 ms) of the battery cell cannot be obtained;

(h) The voltage & (Tmax-Tmin) >30 ℃ & Tmax >60 ℃ (3000 ms) of the battery cell can not be obtained;

(i) 20s dT/dT >3 ℃/3s (3000 ms) before battery parameters are not updated and battery parameters are not updated (12 s);

(j) 20s Tmax >78 ℃ (3000 ms) & battery parameter not updated (12 s) before battery parameter not updated;

(k) Before the battery parameters are not updated, the temperature difference (Tmax-Tmin) >30 ℃ & Tmax >60 ℃ ] (3000 ms) & the battery parameters are not updated (12 s).

The time (300 ms) in parentheses in the above description indicates that the duration is 300ms or longer.

The parameters mentioned above, such as 300ms, 78 ℃ and the like, are values obtained by combining experience on the basis of practice, the accuracy is high, the problem that the battery cabinet which is not subjected to thermal runaway is erroneously determined to be subjected to thermal runaway, or the battery cabinet which is subjected to thermal runaway is erroneously determined to be not subjected to thermal runaway is avoided, and the accuracy of determining whether the battery cabinet is subjected to thermal runaway can be greatly improved.

After the BMU determines that the battery cabinet has thermal runaway, fault information can be sent to a station control system of the power exchange station.

As one example, the BMU may send fault information directly to the station control system.

As another example, the BMU may send fault information to the station control system through a charger that charges the battery closet. The BMU may send the fault information to the charger in a CAN communication manner or a daisy chain communication manner, and after the charger receives the fault information, the fault information may be transmitted to the station control system in an ethernet communication manner.

In general, the BMU communicates through a CAN communication manner, but the station control system may not support the CAN communication manner, so in the above technical solution, the BMU sends fault information to the station control system through a charger for charging the battery cabinet, so that the BMU and the charger CAN communicate through the CAN communication manner, and the charger and the station control system CAN communicate through the communication manner (such as ethernet) supported by the station control system and the charger, thereby advantageously ensuring normal operation of communication between the BMU and the station control system.

Of course, communication between the BMU and the charger, and between the charger and the station control system may also be performed by other communication manners, which is not specifically limited in the embodiments of the present application.

Further, if the battery cabinet includes a plurality of batteries, the method 100 may further include: the BMU determines whether each battery has thermal runaway according to the battery parameters of each battery in the plurality of batteries, and outputs a thermal runaway fault zone bit corresponding to each battery.

For example, if the thermal runaway fault flag bit is "0", it indicates that the battery is not thermally out of control; if the thermal runaway flag bit is "1", this indicates that thermal runaway has occurred in the battery. Assuming that the battery cabinet includes 4 batteries, the BMU outputs "0110", it is known that the second and third batteries are thermally out of control, and the first and fourth batteries are not thermally out of control.

The BMU outputs the thermal runaway fault flag bit corresponding to each battery, which may be outputting the thermal runaway fault flag bit corresponding to each battery to the station control system, or outputting the thermal runaway fault flag bit corresponding to each battery to the upper computer, or outputting the thermal runaway fault flag bit corresponding to each battery to itself.

Alternatively, the BMU may output only identification information of the battery in which thermal runaway occurs. In other words, the BMU may determine a target battery in which thermal runaway occurs according to a battery parameter of each of the plurality of batteries, and output identification information of the target battery.

The identification information may include, but is not limited to, a Serial Number (SN) of the target battery and a group identification of the target battery among the plurality of batteries. The identification of the target battery within the group of the plurality of batteries may be a number of the target battery among the plurality of batteries, such as may be a number determined based on an electrical schematic.

According to the technical scheme, whether the battery cabinet is in thermal runaway or not is determined, the specific battery in thermal runaway is determined, the identification information of the battery in thermal runaway is output, the equipment (such as a host computer, a station control system and the like) receiving the identification information conveniently performs subsequent operation on the battery in thermal runaway, for example, the station control system displays the battery in thermal runaway on a display screen of the battery replacement station, so that a worker of the battery replacement station can replace only the battery in thermal runaway without replacing the whole battery cabinet, and battery cost is saved.

After the station control system receives the fault information, the station control system can perform thermal runaway treatment on the battery cabinet based on the fault information.

Specifically, the station control system can stop charging of the battery charger to the battery cabinet based on the fault information. For example, the station control system may send a stop message to the charger, where the stop message is used to instruct the charger to stop charging the battery closet. And after receiving the stopping information, the charger stops charging the battery-changing cabinet.

Further, the station control system can also disconnect a charging contactor between the battery changing cabinet and the charger. For example, the station control system may open the charging contactor while stopping the charging of the battery cabinet by the charger.

Fig. 3 shows a schematic flow chart of another method 300 of thermal runaway detection provided herein. The method 300 may include at least some of the following.

S310: the station control system of the power exchange station receives fault information sent by the BMU, wherein the fault information is used for indicating that the power exchange cabinet in the power exchange station has thermal runaway.

S320: and the station control system carries out thermal runaway treatment on the battery-changing cabinet according to the fault information.

Optionally, in an embodiment of the present application, the station control system of the power exchange station receives fault information sent by the BMU, including: and the station control system receives fault information through a charger for charging the battery changing cabinet.

Optionally, in an embodiment of the present application, the station control system performs thermal runaway processing on the power exchange cabinet according to the fault information, including: and the station control system stops the charging of the battery charger to the battery-changing cabinet according to the fault information.

Optionally, in an embodiment of the present application, the method 300 further includes: the station control system disconnects a charging contactor between the battery changing cabinet and the charger.

Alternatively, in an embodiment of the present application, the method 300 is applied to a heavy truck.

It should be appreciated that although methods 100 and 300 are described above as separate, this does not mean that methods 100 and 300 are independent, and that descriptions of methods 100 and 300 may be referred to each other. Alternatives to method 100 and method 300 may be used in combination without conflict. For example, descriptions regarding thermal runaway management of powered devices by a VCU in method 100 based on fault information may apply to method 300.

In the embodiment of the present application, the sequence number of each process does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by the function and the internal logic of each process, and should not constitute any limitation on the implementation process of the embodiment of the present application.

On the premise of no conflict, various embodiments described in the present application and/or technical features in various embodiments may be combined with each other arbitrarily, and a technical solution obtained after combination should also fall into the protection scope of the present application.

Having described the method of thermal runaway detection of the embodiments of the present application in detail above, the apparatus of thermal runaway detection of the embodiments of the present application will be described below. It should be appreciated that the apparatus for thermal runaway detection in embodiments of the present application may perform the method for thermal runaway detection in embodiments of the present application.

Fig. 4 shows a schematic block diagram of an apparatus 400 for thermal runaway detection in accordance with an embodiment of the present application. The apparatus 400 may be applied to a BMU. As shown in fig. 4, the apparatus 400 may include:

and the processing unit 410 is configured to determine whether the battery cabinet is thermally out of control according to battery parameters of the battery in the battery cabinet, where the battery parameters include a temperature of the battery cell and/or a voltage of the battery cell.

And the communication unit 420 is used for sending fault information to the station control system of the power exchange station if the battery cabinet is determined to be out of control, wherein the fault information is used for indicating that the battery cabinet is out of control.

Optionally, in the embodiment of the present application, the communication unit 420 is specifically configured to: and sending fault information to the station control system through a charger for charging the battery changing cabinet.

Optionally, in an embodiment of the present application, the communication unit 420 is further configured to: and receiving battery parameters sent by a battery cell monitoring unit CSC in the battery.

Optionally, in an embodiment of the present application, the battery parameters include at least one of the following parameters: a minimum voltage among voltages of the battery cells; the highest temperature among the temperatures of the battery cells; the rate of rise of the temperature of the battery cell over time; the temperature difference between the highest temperature and the lowest temperature among the temperatures of the battery cells.

Optionally, in an embodiment of the present application, the processing unit 410 is specifically configured to: the BMU determines that thermal runaway of the battery compartment has occurred if the battery parameter meets at least one of the following fault conditions;

fault conditions include the following: the duration for which the minimum voltage is less than the voltage threshold is above a first duration threshold, and the duration for which the maximum temperature is greater than the first temperature threshold is above a second duration threshold; the duration for which the minimum voltage is less than the voltage threshold is above a first duration threshold, and the duration for which the rate of rise of temperature over time is greater than the rate of rise threshold is above a second duration threshold; the duration of the minimum voltage being less than the voltage threshold is above a first duration threshold, the duration of the temperature difference being greater than a second temperature threshold is above a second duration threshold, and the duration of the maximum temperature being greater than a third temperature threshold is above a second duration threshold; the time duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above a second time duration threshold, and the time duration for which the maximum temperature is greater than the first temperature threshold is above the second time duration threshold; the time duration that the temperature rise rate with time is greater than the rise rate threshold is above a second time duration threshold, the time duration that the temperature difference is greater than the second temperature threshold is above the second time duration threshold, and the time duration that the highest temperature is greater than the third temperature threshold is above the second time duration threshold; the voltage of the battery monomer cannot be obtained, and the duration of time when the highest temperature is higher than the first temperature threshold is higher than the second duration threshold; the voltage of the battery monomer cannot be obtained, and the duration of time when the rate of rise of the temperature along with time is greater than the rate of rise threshold is above a second duration threshold; the voltage of the battery monomer cannot be obtained, the duration of the temperature difference being greater than the second temperature threshold is greater than the second duration threshold, and the duration of the highest temperature being greater than the third temperature threshold is greater than the second duration threshold; in the front target moment when the battery parameter is not updated, the duration that the rising rate of the temperature along with time is larger than the rising rate threshold value is more than a second duration threshold value, and the duration that the battery parameter is not updated is more than a third duration threshold value; in the front target moment when the battery parameter is not updated, the duration that the highest temperature is greater than the first temperature threshold is more than the second duration threshold, and the duration that the battery parameter is not updated is more than the third duration threshold; at a pre-target time when the battery parameter is not updated, a duration for which the temperature difference is greater than the second temperature threshold is above the second duration threshold, a duration for which the highest temperature is greater than the third temperature threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above the third duration threshold.

Alternatively, in the present embodiment, the voltage threshold is 1.7V; and/or the first time length threshold is 300ms; and/or the second duration threshold is 3000ms; and/or the third duration threshold is 12s; and/or the first temperature threshold is 78 ℃; and/or the second temperature threshold is 30 ℃; and/or the third temperature threshold is 60 ℃; and/or the rise rate threshold is 3 ℃/3s; and/or the target time is 20s.

Optionally, in an embodiment of the present application, the battery cabinet includes a plurality of batteries, and the processing unit 410 is further configured to: determining a target battery in which thermal runaway occurs according to a battery parameter of each of the plurality of batteries; and outputting the identification information of the target battery.

Alternatively, in embodiments of the present application, the apparatus 400 is applied to a heavy truck.

It should be understood that the apparatus 400 may implement the corresponding operations in the method 200, and are not described herein for brevity.

Fig. 5 shows a schematic block diagram of an apparatus 500 for thermal runaway detection in an embodiment of the present application. The apparatus 500 may be applied to a station control system of a power exchange station. As shown in fig. 5, the apparatus 500 may include:

and the communication unit 510 is used for receiving fault information sent by the BMU, wherein the fault information is used for indicating that the heat runaway occurs in the power exchange cabinet in the power exchange station.

And the processing unit 520 is used for performing thermal runaway processing on the battery-changing cabinet according to the fault information.

Optionally, in the embodiment of the present application, the communication unit 510 is specifically configured to: and receiving fault information through a charger for charging the battery-changing cabinet.

Optionally, in the embodiment of the present application, the processing unit 520 is specifically configured to: and stopping charging the battery cabinet by the charger according to the fault information.

Optionally, in an embodiment of the present application, the processing unit 520 is further configured to: and disconnecting the charging contactor between the battery changing cabinet and the charger.

Alternatively, in an embodiment of the present application, the apparatus 500 is applied to a heavy truck.

It should be understood that the apparatus 500 may implement the corresponding operations in the method 300, and are not described herein for brevity.

Fig. 6 is a schematic hardware configuration of an apparatus 600 for thermal runaway detection according to an embodiment of the present application. The apparatus 600 includes a memory 601, a processor 602, a communication interface 603, and a bus 604. The memory 601, the processor 602, and the communication interface 603 are connected to each other by a bus 604.

The memory 601 may be a read-only memory (ROM), a static storage device, and a random access memory (random access memory, RAM). The memory 601 may store a program, and the processor 602 and the communication interface 603 are configured to perform the steps of the method of thermal runaway detection of the embodiments of the present application when the program stored in the memory 601 is executed by the processor 602.

The processor 602 may employ a general-purpose central processing unit (central processing unit, CPU), microprocessor, application specific integrated circuit (application specific integrated circuit, ASIC), graphics processor (graphics processing unit, GPU) or one or more integrated circuits for executing associated programs to perform functions required to be performed by the units in the apparatus of the embodiments of the present application or to perform the methods of thermal runaway detection of the embodiments of the present application.

The processor 602 may also be an integrated circuit chip with signal processing capabilities. In implementation, various steps of the method of thermal runaway detection of embodiments of the present application may be accomplished by instructions in the form of integrated logic circuits or software of hardware in the processor 602.

The processor 602 may also be a general purpose processor, a digital signal processor (digital signal processing, DSP), an ASIC, an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 601, and the processor 602 reads information in the memory 601, and in combination with its hardware, performs functions that the unit included in the apparatus for thermal runaway detection of the embodiment of the present application needs to perform, or performs the method for thermal runaway detection of the embodiment of the present application.

The communication interface 603 enables communication between the apparatus 600 and other devices or communication networks using a transceiving apparatus, such as, but not limited to, a transceiver. For example, the device 600 may send fault information to the VCU through the communication interface 603.

A bus 604 may include a path that communicates information between components of the device 600 (e.g., the memory 601, the processor 602, the communication interface 603).

It should be noted that although the above-described apparatus 600 only shows a memory, a processor, a communication interface, in a particular implementation, those skilled in the art will appreciate that the apparatus 600 may also include other devices necessary to achieve proper operation. Also, as will be appreciated by those skilled in the art, the apparatus 600 may also include hardware devices that implement other additional functions, as desired. Furthermore, it will be appreciated by those skilled in the art that the apparatus 600 may also include only the necessary devices to implement the embodiments of the present application, and not necessarily all of the devices shown in fig. 6.

Embodiments of the present application also provide a computer readable storage medium for storing a computer program for performing the methods of the various embodiments of the present application described above.

The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

The present embodiments also provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method of thermal runaway detection described above.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

A method of thermal runaway detection, the method comprising:

the battery management unit BMU determines whether the battery cabinet is out of control or not according to battery parameters of a battery in the battery cabinet, wherein the battery parameters comprise the temperature of a battery monomer in the battery and/or the voltage of the battery monomer;

If the battery cabinet is determined to be out of control, the BMU sends fault information to a station control system of the power exchange station, wherein the fault information is used for indicating the battery cabinet to be out of control.
The method of claim 1, wherein the BMU sends fault information to a station control system of a power exchange station, comprising:

and the BMU sends the fault information to the station control system through a charger for charging the battery changing cabinet.
The method according to claim 1 or 2, characterized in that the method further comprises:

the BMU receives the battery parameters sent by a cell monitoring unit CSC in the battery.
A method according to any one of claims 1 to 3, wherein the battery parameters include at least one of the following parameters:

a minimum voltage among voltages of the battery cells;

the highest temperature among the temperatures of the battery cells;

the rate of rise of the temperature of the battery cell over time;

the temperature difference between the highest temperature and the lowest temperature among the temperatures of the battery cells.
The method of claim 4, wherein the battery management unit BMU determining whether thermal runaway has occurred in the battery compartment based on battery parameters of the battery in the battery compartment comprises:

The BMU determining that thermal runaway of the battery compartment has occurred if the battery parameter meets at least one of the following fault conditions;

the fault conditions include the following:

the duration that the minimum voltage is smaller than the voltage threshold is above a first duration threshold, and the duration that the maximum temperature is greater than the first temperature threshold is above a second duration threshold;

the duration for which the minimum voltage is less than the voltage threshold is above the first duration threshold, and the duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second duration threshold;

the duration that the minimum voltage is less than the voltage threshold is above the first duration threshold, the duration that the temperature difference is greater than a second temperature threshold is above the second duration threshold, and the duration that the maximum temperature is greater than a third temperature threshold is above the second duration threshold;

the time duration during which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second time duration threshold, and the time duration during which the maximum temperature is greater than the first temperature threshold is above the second time duration threshold;

The time duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second time duration threshold, the time duration for which the temperature difference is greater than the second temperature threshold is above the second time duration threshold, and the time duration for which the maximum temperature is greater than the third temperature threshold is above the second time duration threshold;

the voltage of the battery monomer cannot be obtained, and the duration of time when the highest temperature is larger than the first temperature threshold is larger than the second duration threshold;

the voltage of the battery monomer cannot be obtained, and the duration of time when the rate of rise of the temperature along with time is greater than the rate of rise threshold is above the second duration threshold;

the voltage of the battery monomer cannot be obtained, the duration of time when the temperature difference is larger than the second temperature threshold is larger than the second duration threshold, and the duration of time when the highest temperature is larger than the third temperature threshold is larger than the second duration threshold;

in a preceding target time when the battery parameter is not updated, a duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above a third duration threshold;

In the front target moment when the battery parameter is not updated, the duration that the highest temperature is greater than a first temperature threshold is more than the second duration threshold, and the duration that the battery parameter is not updated is more than the third duration threshold;

at a pre-target time when the battery parameter is not updated, a duration for which the temperature difference is greater than the second temperature threshold is above the second duration threshold, a duration for which the maximum temperature is greater than the third temperature threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above the third duration threshold.
The method of claim 5, wherein the voltage threshold is 1.7V; and/or

The first time length threshold is 300ms; and/or

The second duration threshold is 3000ms; and/or

The third duration threshold is 12s; and/or

The first temperature threshold is 78 ℃; and/or

The second temperature threshold is 30 ℃; and/or

The third temperature threshold is 60 ℃; and/or

The rise rate threshold is 3 ℃/3s; and/or

The target time is 20s.
The method of any one of claims 1 to 6, wherein the battery cabinet comprises a plurality of batteries, the method further comprising:

The BMU determines a target battery with thermal runaway according to battery parameters of each battery in a plurality of batteries;

the BMU outputs the identification information of the target battery.
The method according to any one of claims 1 to 7, characterized in that the method is applied to a heavy truck.
A method of thermal runaway detection, the method comprising:

the station control system of the power exchange station receives fault information sent by a battery management unit BMU, wherein the fault information is used for indicating that a thermal runaway occurs in a power exchange cabinet in the power exchange station;

and the station control system carries out thermal runaway treatment on the power exchange cabinet according to the fault information.
The method according to claim 9, wherein the station control system of the power exchange station receives fault information sent by the battery management unit BMU, comprising:

and the station control system receives the fault information through a charger for charging the battery changing cabinet.
The method according to claim 9 or 10, wherein the station control system performs a thermal runaway process on the battery closet according to the fault information, including:

and the station control system stops the charging of the battery charger to the battery changing cabinet according to the fault information.
The method of claim 11, wherein the method further comprises:

and the station control system disconnects a charging contactor between the battery changing cabinet and the charger.
The method according to any one of claims 9 to 12, characterized in that the method is applied to a heavy truck.
An apparatus for thermal runaway detection, applied to a battery management unit BMU, comprising:

the processing unit is used for determining whether the battery cabinet is in thermal runaway according to battery parameters of the battery in the battery changing cabinet, wherein the battery parameters comprise the temperature of the battery monomer in the battery and/or the voltage of the battery monomer;

and the communication unit is used for sending fault information to a station control system of the power exchange station if the battery cabinet is determined to be out of control, wherein the fault information is used for indicating that the battery cabinet is out of control.
The apparatus according to claim 14, wherein the communication unit is specifically configured to:

and sending the fault information to the station control system through a charger for charging the battery changing cabinet.
The apparatus according to claim 14 or 15, wherein the communication unit is further configured to:

The battery parameters sent by the cell monitoring unit CSC in the battery are received.
The apparatus of any one of claims 14 to 16, wherein the battery parameters include at least one of the following:

a minimum voltage among voltages of the battery cells;

the highest temperature among the temperatures of the battery cells;

the rate of rise of the temperature of the battery cell over time;

the temperature difference between the highest temperature and the lowest temperature among the temperatures of the battery cells.
The apparatus according to claim 17, wherein the processing unit is specifically configured to:

the BMU determining that thermal runaway of the battery compartment has occurred if the battery parameter meets at least one of the following fault conditions;

the fault conditions include the following:

the duration that the minimum voltage is smaller than the voltage threshold is above a first duration threshold, and the duration that the maximum temperature is greater than the first temperature threshold is above a second duration threshold;

the duration for which the minimum voltage is less than the voltage threshold is above the first duration threshold, and the duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second duration threshold;

The duration that the minimum voltage is less than the voltage threshold is above the first duration threshold, the duration that the temperature difference is greater than a second temperature threshold is above the second duration threshold, and the duration that the maximum temperature is greater than a third temperature threshold is above the second duration threshold;

the time duration during which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second time duration threshold, and the time duration during which the maximum temperature is greater than the first temperature threshold is above the second time duration threshold;

the time duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second time duration threshold, the time duration for which the temperature difference is greater than the second temperature threshold is above the second time duration threshold, and the time duration for which the maximum temperature is greater than the third temperature threshold is above the second time duration threshold;

the voltage of the battery monomer cannot be obtained, and the duration of time when the highest temperature is larger than the first temperature threshold is larger than the second duration threshold;

the voltage of the battery monomer cannot be obtained, and the duration of time when the rate of rise of the temperature along with time is greater than the rate of rise threshold is above the second duration threshold;

The voltage of the battery monomer cannot be obtained, the duration of time when the temperature difference is larger than the second temperature threshold is larger than the second duration threshold, and the duration of time when the highest temperature is larger than the third temperature threshold is larger than the second duration threshold;

in a preceding target time when the battery parameter is not updated, a duration for which the rate of rise of the temperature over time is greater than the rate of rise threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above a third duration threshold;

in the front target moment when the battery parameter is not updated, the duration that the highest temperature is greater than a first temperature threshold is more than the second duration threshold, and the duration that the battery parameter is not updated is more than the third duration threshold;

at a pre-target time when the battery parameter is not updated, a duration for which the temperature difference is greater than the second temperature threshold is above the second duration threshold, a duration for which the maximum temperature is greater than the third temperature threshold is above the second duration threshold, and a duration for which the battery parameter is not updated is above the third duration threshold.
The apparatus of claim 18, wherein the voltage threshold is 1.7V; and/or

The first time length threshold is 300ms; and/or

The second duration threshold is 3000ms; and/or

The third duration threshold is 12s; and/or

The first temperature threshold is 78 ℃; and/or

The second temperature threshold is 30 ℃; and/or

The third temperature threshold is 60 ℃; and/or

The rise rate threshold is 3 ℃/3s; and/or

The target time is 20s.
The apparatus of any one of claims 14 to 19, wherein the battery compartment comprises a plurality of the batteries, the processing unit further configured to:

determining a target battery in which thermal runaway occurs according to battery parameters of each battery in a plurality of batteries;

and outputting the identification information of the target battery.
The device according to any one of claims 14 to 20, characterized in that it is applied to a heavy truck.
An apparatus for thermal runaway detection, characterized by a station control system applied to a power exchange station, the apparatus comprising:

the communication unit is used for receiving fault information sent by the battery management unit BMU, and the fault information is used for indicating that the battery changing cabinet in the battery changing station is out of control;

And the processing unit is used for carrying out thermal runaway processing on the battery changing cabinet according to the fault information.
The apparatus according to claim 22, wherein the communication unit is specifically configured to:

and receiving the fault information through a charger for charging the battery changing cabinet.
The apparatus according to claim 22 or 23, wherein the processing unit is specifically configured to:

and stopping charging of the battery charger to the battery changing cabinet according to the fault information.
The apparatus of claim 24, wherein the processing unit is further configured to:

and disconnecting the charging contactor between the battery changing cabinet and the charger.
The device according to any one of claims 22 to 25, wherein the device is applied to a heavy truck.
An apparatus for thermal runaway detection, comprising:

a memory for storing a program;

a processor for executing the memory-stored program, which, when executed, is for performing the method of thermal runaway detection according to any one of claims 1 to 8.
An apparatus for thermal runaway detection, comprising:

A memory for storing a program;

a processor for executing the memory-stored program, which, when executed, is adapted to carry out the method of thermal runaway detection according to any one of claims 9 to 13.
A computer-readable storage medium storing a computer program that causes a computer to execute the method of thermal runaway detection according to any one of claims 1 to 8.
A computer-readable storage medium storing a computer program that causes a computer to execute the method of thermal runaway detection according to any one of claims 9 to 13.