Battery pack testing equipment, methods and vehicles

Abstract

This disclosure relates to a detection device, method, and vehicle for a battery pack. The detection device is disposed inside the battery pack and includes a first metal sheet, a second metal sheet, and a processor. The first metal sheet includes a first end and a second end, and the second metal sheet includes a third end and a fourth end. The first end and the third end are respectively connected to the processor. A gap exists between the second end and the fourth end, and the second end and the fourth end are capable of thermal deformation contact when the temperature is higher than a preset temperature. The processor is used to detect the resistance value between the first end and the third end, and the resistance value is used to determine whether the battery pack is in a thermal runaway state. Using the above technical solution, rapid detection of thermal runaway phenomena in a battery pack can be achieved.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack technology, and more particularly to battery pack testing apparatus, methods, and vehicles. Background Technology

[0002] For electric vehicles, the safety of the power battery is paramount. However, in some situations, power batteries may inevitably experience safety malfunctions such as thermal runaway or spontaneous combustion. Therefore, to ensure passenger safety, early warning systems can be implemented to issue hazard alerts in advance when a power battery safety malfunction occurs, informing passengers to move away from the vehicle as soon as possible. However, in some scenarios, power battery safety malfunctions may not be identified in time, posing a risk of safety incidents. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a battery pack testing device, method, and vehicle.

[0004] According to a first aspect of the present disclosure, a battery pack detection device is provided, disposed inside the battery pack. The detection device includes a first metal sheet, a second metal sheet, and a processor. The first metal sheet includes a first end and a second end, and the second metal sheet includes a third end and a fourth end.

[0005] The first end and the third end are respectively connected to the processor, and there is a gap between the second end and the fourth end. The second end and the fourth end can be heated and deformed to contact when the temperature is higher than a preset temperature.

[0006] The processor is used to detect the resistance value between the first terminal and the third terminal, and the resistance value is used to determine whether the battery pack is in a thermal runaway state.

[0007] Optionally, the processor is configured to, when the resistance value is less than a set first resistance value, acquire the cell voltage information and cell temperature information of the battery pack; and, when the cell voltage information and cell temperature information are abnormal, determine that the battery pack is in a thermal runaway state.

[0008] Optionally, the processor is further configured to determine that the battery pack is in a coolant leakage state when the resistance value is within a set resistance value range.

[0009] Optionally, it also includes:

[0010] A housing, wherein a cavity is formed inside the housing, and a through hole is provided on the housing to communicate with the cavity;

[0011] The first metal sheet is inserted through the housing and has a first end located inside the cavity and a second end located outside the housing; the second metal sheet is inserted through the housing and has a third end located outside the housing and a fourth end located inside the cavity.

[0012] Optionally, the detection device is located at any corner inside the battery pack housing.

[0013] Optionally, the battery includes a water-cooled plate, and the detection device is disposed within a preset area at the connection between the water-cooled plate and the coolant pipe.

[0014] According to a second aspect of the present disclosure, a method for detecting a battery pack is provided, applied to the battery pack detection apparatus described in any one of the first aspects above, the method comprising:

[0015] Obtain the resistance value between the first end of the first metal sheet and the third end of the second metal sheet;

[0016] The resistance value is used to determine whether the battery pack is in a state of thermal runaway.

[0017] Optionally, determining whether the battery pack is in a thermal runaway state based on the resistance value includes:

[0018] When the resistance value is less than a set first resistance value, the cell voltage information and cell temperature information of the battery pack are obtained;

[0019] If the cell voltage and cell temperature information are abnormal, it is determined that the battery pack is in a state of thermal runaway.

[0020] Optionally, it also includes:

[0021] If the resistance value is within a set resistance value range, it is determined that the battery pack is in a coolant leakage state.

[0022] Optionally, it includes:

[0023] If the battery pack is in a state of thermal runaway, a first warning message will be issued; or,

[0024] A second warning message is issued if the battery pack is in a state of coolant leakage.

[0025] According to a third aspect of the present disclosure, a vehicle is provided, including a detection device for a battery pack as described in any one of the first aspects.

[0026] In the above technical solution, the detection device for the battery pack is disposed inside the battery pack and includes a first metal plate, a second metal plate, and a processor. The first metal plate includes a first end and a second end, and the second metal plate includes a third end and a fourth end. Furthermore, the first end and the third end are respectively connected to the processor, and there is a gap between the second end and the fourth end. Thus, the processor can detect the resistance value between the first end and the third end. Because there is a gap between the second end and the fourth end, the first end and the third end are in an open circuit state, at which point the resistance is infinite. However, during thermal runaway, the second end and the fourth end deform and come into contact due to heat, forming a circuit between the first end and the third end, at which point the resistance value is small. Therefore, the thermal runaway state of the battery pack can be quickly identified based on the resistance value.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0029] Figure 1 This is a block diagram illustrating a battery pack detection device according to an exemplary embodiment.

[0030] Figure 2 This is a schematic diagram illustrating an anomaly detection process according to an exemplary embodiment.

[0031] Figure 3 This is a schematic diagram of the detection section of a battery pack detection device according to an exemplary embodiment.

[0032] Figure 4 This is a cross-sectional view of the detection section of a battery pack detection device according to an exemplary embodiment.

[0033] Figure 5 This is a flowchart illustrating a battery pack detection method according to an exemplary embodiment.

[0034] Figure 6 This is a flowchart illustrating a battery pack detection method according to an exemplary embodiment.

[0035] Figure 7 This is a flowchart illustrating a battery pack detection method according to an exemplary embodiment.

[0036] Figure 8 This is a flowchart illustrating a battery pack testing process according to an exemplary embodiment.

[0037] Figure 9 This is a functional block diagram of a vehicle illustrating an exemplary embodiment.

[0038] Explanation of reference numerals in the attached figures

[0039] 100 - First metal sheet, 101 - First end, 102 - Second end, 200 - Second metal sheet, 203 - Third end, 204 - Fourth end, 30 - Housing, 40 - High temperature resistant cable, 50 - High temperature resistant cable. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0041] Before introducing the battery pack testing apparatus, method, and vehicle disclosed herein, the application scenarios of this disclosure will first be introduced. For electric vehicles, the safety of the power battery is a major concern. Since power battery failures are difficult to avoid, in relevant scenarios, early warning systems are used to inform users of the current risks associated with the power battery, thereby reducing potential losses.

[0042] To provide fault warnings, it's first necessary to identify abnormal states of the power battery. For example, in some scenarios, the voltage and temperature of the battery pack's cells can be monitored. When abnormal changes occur in cell voltage and temperature, it confirms a risk of thermal runaway and issues a warning. However, since anomalies in single-cell voltage / temperature data may be due to data loss, this method requires a period of continuous monitoring to detect abnormalities before triggering an alarm. In other words, this method suffers from slow anomaly identification and untimely alarms.

[0043] In some scenarios, pressure sensors can be used to identify the risk of thermal runaway in power batteries. These sensors monitor pressure changes within the battery pack. By combining pressure values, cell voltage, and cell temperature, the risk of thermal runaway can be identified, thus improving the speed of anomaly detection. However, pressure sensors are relatively expensive, increasing the cost of detection. Furthermore, during thermal runaway, the pressure fluctuations within the battery pack are significant, making it difficult to determine the abnormal pressure range, which further complicates thermal runaway identification.

[0044] It is also worth noting that these detection methods can detect thermal runaway in battery packs, but cannot detect coolant leakage in battery packs.

[0045] Therefore, this disclosure provides a battery pack detection device disposed inside the battery pack. The detection device includes a first metal plate, a second metal plate, and a processor. The first metal plate includes a first end and a second end, and the second metal plate includes a third end and a fourth end.

[0046] The first end and the third end are respectively connected to the processor, and there is a gap between the second end and the fourth end. The second end and the fourth end can be heated and deformed to contact when the temperature is higher than a preset temperature.

[0047] The processor is used to detect the resistance value between the first terminal and the third terminal, and the resistance value is used to determine whether the battery pack is in a thermal runaway state.

[0048] Reference Figure 1 The diagram shows a block diagram of a battery pack detection device. The first metal sheet 100 and / or the second metal sheet 200 can be a metal composite, such as a steel-copper composite. Generally, steel has a coefficient of thermal expansion of 12 ppm / ℃, while copper has a coefficient of thermal expansion of 16.6 ppm / ℃. Due to the difference in thermal expansion coefficients between the two metals, when the steel and copper composite is at a high temperature, it can bend towards the side with the smaller coefficient of thermal expansion. Therefore, by configuring the first metal sheet 100 and / or the second metal sheet, the second end 102 and the fourth end 204 can be thermally deformed and come into contact when the temperature is higher than a preset temperature.

[0049] It should be noted that due to the gap between the second terminal 102 and the fourth terminal 204, when the battery pack is in a normal state, the first terminal 101 and the third terminal 203 are not in contact, i.e., they are in an open circuit state, and the resistance measured by the processor is infinite. However, during thermal runaway of the battery pack, the second terminal 102 and the fourth terminal 204 are heated and deformed into contact under the action of high-temperature gas, thus forming a circuit between the first terminal 101 and the third terminal 203. In this case, the processor can measure a significant change in the resistance value between the first terminal 101 and the third terminal 203, i.e., from infinite to a smaller value. Therefore, the thermal runaway state of the battery pack can be quickly identified based on this resistance value.

[0050] For example, in one possible implementation, the processor is configured to acquire cell voltage information and cell temperature information of the battery pack when the resistance value is less than a set first resistance value; and determine that the battery pack is in a thermal runaway state when the cell voltage information and the cell temperature information are abnormal.

[0051] Here, the first resistance value can be obtained based on the material and dimensional structure testing of the first metal sheet 100 and the second metal sheet 200, and this disclosure does not impose any limitations on this. Furthermore, the processor can, for example, interact with the BMS (Battery Management System) to obtain the cell voltage and cell temperature information of the battery pack. Thus, the processor can determine that the battery pack is in a thermal runaway state if the resistance value is less than the set first resistance value and if the cell voltage and cell temperature information are abnormal.

[0052] When the processor determines that the battery pack is in a thermal runaway state, it can also interact with the VCU (Vehicle Control Unit) to report the abnormal information to the VCU. The VCU can then issue an alarm through a warning actuator.

[0053] Of course, refer to Figure 2 The diagram illustrates an anomaly detection process. In some implementation scenarios, the processor may also refer to a Battery Management System (BMS). The BMS can be connected to the second terminal 102 of the first metal plate 100 and the fourth terminal 204 of the second metal plate 200. When the resistance value is less than a set first resistance value, the BMS acquires the cell voltage and cell temperature information of the battery pack. Thus, if the cell voltage and cell temperature information are abnormal, the BMS can determine that the battery pack is in a thermal runaway state.

[0054] In addition, refer to Figure 3 A schematic diagram of the detection section of a battery pack detection device is shown, along with a reference diagram. Figure 4 The diagram shows a cross-sectional view of the detection section of a battery pack detection device. In one possible embodiment, the battery pack detection device further includes:

[0055] The housing 30 has a cavity inside and a through hole communicating with the cavity.

[0056] The first metal sheet 100 is inserted through the housing 30 and has a first end 101 located inside the cavity and a second end 102 located outside the housing 30; the second metal sheet 200 is inserted through the housing 30 and has a third end 203 located outside the housing 30 and a fourth end 204 located inside the cavity.

[0057] For example, refer to Figure 4A first metal sheet 100 and a second metal sheet 200 are disposed within the housing 30. The portion of the first metal sheet 100 located within the cavity is formed as a cantilever beam structure, and the portion of the second metal sheet 200 located within the cavity is also formed as a cantilever beam structure.

[0058] In this way, high-temperature gas and coolant can enter the cavity through the small holes in the housing 30. When high-temperature gas enters the cavity, the portion of the first metal sheet 100 and / or the portion of the second metal sheet 200 located in the cavity are heated and bent, causing the second end 102 to contact the fourth end 204, resulting in a change in resistance. Furthermore, the first end 101 can be connected to the processor, for example, via a high-temperature resistant cable 40, and the third end 203 can be connected to the processor, for example, via a high-temperature resistant cable 50. When coolant enters the cavity, it fills the cavity, and the second end 102 and the fourth end 204 are connected through the coolant, resulting in a change in resistance. Thus, the processor can determine whether the battery pack is in a thermal runaway state or a coolant leakage state based on the change in resistance.

[0059] In the above technical solution, the detection device for the battery pack is located inside the battery pack and includes a first metal plate, a second metal plate, and a processor. The first metal plate includes a first end and a second end, and the second metal plate includes a third end and a fourth end. Furthermore, the first end and the third end are respectively connected to the processor, and there is a gap between the second end and the fourth end. In this way, the processor can detect the resistance value between the first end and the third end. Because there is a gap between the second end and the fourth end, the first end and the third end are in an open circuit state, at which point the resistance is infinite. However, during thermal runaway, the second end and the fourth end deform and come into contact due to heat, forming a circuit between the first end and the third end, at which point the resistance value is small. Therefore, the thermal runaway state of the battery pack can be quickly identified based on the resistance value. Moreover, compared to the detection method using voltage sensors, the above technical solution also has the advantages of lower cost and a clearer range of outliers, thus making it easier to implement.

[0060] In one possible implementation, the processor is configured to determine that the battery pack is in a coolant leakage state when the resistance value is within a set resistance value range.

[0061] It should be noted that when the battery pack is in normal operation, there is no direct path between the first and third terminals due to the gap between the second and fourth terminals. At this time, the processor can measure an infinite resistance between the first and third terminals. However, when coolant leaks from the battery pack, the leaked coolant gradually accumulates, eventually submerging the gap between the second and fourth terminals. This creates a direct path between the first and third terminals, and the processor can then measure a change in the resistance between them, within a set resistance range. For example, during the coolant leak, the resistance value may decrease.

[0062] Here, the resistance value range may vary depending on the coolant material. Therefore, the resistance value range can be calibrated based on actual conditions, and this disclosure does not limit the specific value of the resistance value range.

[0063] Thus, when the processor detects that the resistance value is within a set resistance value range, it determines that the battery pack is in a coolant leakage state. It should be noted that in related scenarios, due to the lack of methods for detecting coolant leaks, coolant leakage is usually only inferred when insulation abnormalities occur. However, using the above technical solution, coolant leakage in the battery pack can be detected by detecting the resistance value.

[0064] Furthermore, since there is still some space on the sides of the current battery pack casing, and these areas are prone to accumulating leaked coolant, in one possible implementation, the detection device is positioned at any corner inside the battery pack casing. This improves the accuracy of coolant leak detection.

[0065] Of course, depending on application requirements, the detection device for the battery pack can also be placed in any area within the battery pack without affecting its functionality. For example, in one possible implementation, the battery includes a water-cooled plate, and the detection device is located within a predetermined area at the connection between the water-cooled plate and the coolant pipe.

[0066] Since coolant leaks typically occur at the connection between the water-cooling plate and the coolant pipe, the accuracy of coolant leak detection can be improved by placing the detection device within a preset area at the connection between the water-cooling plate and the coolant pipe.

[0067] Furthermore, the number of detection devices for the battery pack may be one or more, and this disclosure does not limit this.

[0068] Based on the same inventive concept, this disclosure provides a method for testing a battery pack, which is applied to the battery pack testing device provided in this disclosure. Figure 5This is a flowchart of a battery pack testing method shown in this disclosure, with reference to... Figure 5 The method includes:

[0069] In step S51, the resistance value between the first end of the first metal sheet and the third end of the second metal sheet is obtained;

[0070] In step S52, it is determined whether the battery pack is in a thermal runaway state based on the resistance value.

[0071] It should be noted that due to the gap between the second and fourth terminals, when the battery pack is in a normal state, the first and third terminals are not in contact, i.e., in an open circuit state, and the resistance measured by the processor is infinite. However, during thermal runaway of the battery pack, the second and / or fourth terminals are heated and deformed into contact under the influence of high-temperature gas, thus creating a circuit between the first and third terminals. In this case, the processor can detect a significant change in the resistance value between the first and third terminals, from infinite to a smaller value. Therefore, the thermal runaway state of the battery pack can be quickly identified based on this resistance value.

[0072] Therefore, when the resistance value is greater than the set second resistance value, the processor can determine that the battery pack is in a normal state, i.e., not in a thermal runaway state. In some implementations, the processor can also determine that the battery pack is in a normal state when the resistance value is infinite.

[0073] In the above technical solution, the detection device for the battery pack is disposed inside the battery pack and includes a first metal plate, a second metal plate, and a processor. The first metal plate includes a first end and a second end, and the second metal plate includes a third end and a fourth end. Furthermore, the first end and the third end are respectively connected to the processor, and there is a gap between the second end and the fourth end. Thus, the processor can detect the resistance value between the first end and the third end. Because there is a gap between the second end and the fourth end, the first end and the third end are in an open circuit state, at which point the resistance is infinite. However, during thermal runaway, the second end and the fourth end deform and come into contact due to heat, forming a circuit between the first end and the third end, at which point the resistance value is small. Therefore, the thermal runaway state of the battery pack can be quickly identified based on the resistance value.

[0074] Figure 6 This is a flowchart of a battery pack testing method shown in this disclosure, with reference to... Figure 6 The method is in Figure 5 Based on this, determining whether the battery pack is in an abnormal state according to the resistance value (step S52) includes:

[0075] In step S521, if the resistance value is less than a set first resistance value, the cell voltage information and cell temperature information of the battery pack are obtained.

[0076] In step S522, if the cell voltage information and the cell temperature information are abnormal, it is determined that the battery pack is in a thermal runaway state.

[0077] Here, the first resistance value can be obtained based on the material and size structure of the first and second metal sheets through testing and calibration, and this disclosure does not impose any limitations on this. Furthermore, the processor can, for example, interact with the BMS to obtain the cell voltage and cell temperature information of the battery pack. Thus, the processor can determine that the battery pack is in a thermal runaway state if the resistance value is less than a set first resistance value and if the cell voltage and cell temperature information are abnormal.

[0078] Figure 7 This is a flowchart of a battery pack testing method shown in this disclosure, with reference to... Figure 7 The method includes:

[0079] In step S71, the resistance value between the first end of the first metal sheet and the third end of the second metal sheet is obtained.

[0080] In step S72, if the resistance value is within a set resistance value range, it is determined that the battery pack is in a coolant leakage state.

[0081] It should be understood that when the battery pack is in normal condition, there is no conductive path between the first and third terminals due to the gap between the second and fourth terminals. At this time, the processor can measure an infinite resistance value between the first and third terminals. However, when coolant leaks from the battery pack, the leaked coolant gradually accumulates, eventually submerging the gap between the second and fourth terminals. This creates a conductive path between the first and third terminals, and the processor can then measure a change in the resistance value between them, within a set resistance range. For example, during the coolant leak, the resistance value may decrease.

[0082] Here, the resistance value range may vary depending on the coolant material. Therefore, the resistance value range can be calibrated based on actual conditions, and this disclosure does not limit the specific value of the resistance value range.

[0083] Thus, when the processor detects that the resistance value is within a set resistance value range, it determines that the battery pack is in a coolant leakage state. It should be noted that in related scenarios, due to the lack of methods for detecting coolant leaks, coolant leakage is usually only inferred when insulation abnormalities occur. However, using the above technical solution, coolant leakage in the battery pack can be detected by detecting the resistance value.

[0084] In some implementation scenarios, a first warning message can be issued when the battery pack is in a state of thermal runaway; and a second warning message can be issued when the battery pack is in a state of coolant leakage.

[0085] Here, warning information can be presented as messages, sounds, lights, or a combination thereof. Providing warnings can reduce losses for users in the event of battery pack failure.

[0086] Figure 8 This is a flowchart of a battery pack testing process shown in this disclosure, with reference to... Figure 8 The process includes:

[0087] Obtain the resistance value between the first end of the first metal sheet and the third end of the second metal sheet.

[0088] Here, the processor can, for example, acquire the resistance value between the first end of the first metal sheet and the third end of the second metal sheet according to a preset time period. The event period can be 1 second, 3 seconds, etc., and this disclosure does not limit it. In some implementation scenarios, the execution end of the method can also respond to the detection command sent by the upper layer application to acquire the resistance value between the first end and the third end.

[0089] Because there is a gap between the second and fourth terminals, the first and third terminals are not in contact when the battery pack is in normal operation, i.e., they are in an open circuit state. At this time, the resistance measured by the processor is infinite. Therefore, when the resistance value is infinite or greater than the set second resistance value, it can be determined that the battery pack is not in a thermal runaway state.

[0090] When the resistance value is not infinite, the processor can determine whether the resistance value is within a preset resistance value range. It should be understood that when coolant leaks from the battery pack, the leaked coolant gradually accumulates, eventually submerging the gap between the second and fourth terminals. This creates a circuit between the first and third terminals, at which point the processor can detect a change in the resistance value between the first and third terminals, and confirm that it falls within the set resistance value range. For example, during coolant leakage, the resistance value may decrease.

[0091] Here, the resistance value range may vary depending on the coolant material. Therefore, the resistance value range can be calibrated based on actual conditions, and this disclosure does not limit the specific value of the resistance value range.

[0092] In this way, when the resistance value is within the set resistance value range, it can be determined that the battery pack is in a coolant leakage state, and a coolant leakage warning can be issued.

[0093] When the resistance value is not within the set resistance value range, it can also be determined whether the resistance value is less than a set first resistance value, which is less than the lower limit of the resistance value range.

[0094] It is worth noting that during thermal runaway of the battery pack, the second and fourth terminals deform and come into contact under the influence of high-temperature gas, thus creating a circuit between the first and third terminals. In this situation, the processor can detect a significant change in the resistance value between the first and third terminals, from infinity to a smaller value. Therefore, the thermal runaway state of the battery pack can be quickly identified based on this resistance value.

[0095] In other words, when the resistance value is less than the first resistance value, the battery pack may be at risk of thermal runaway. At this time, the cell voltage and cell temperature can be obtained. If the cell voltage and cell temperature are abnormal (such as sampling failure), it can be determined that the battery pack is in a thermal runaway state, and a thermal runaway warning can be issued.

[0096] Here, the first resistance value can be obtained based on the material and size structure of the first and second metal sheets through testing and calibration, and this disclosure does not impose any limitations on this. Furthermore, the processor can, for example, interact with the BMS to obtain the cell voltage and cell temperature information of the battery pack. Thus, the processor can determine that the battery pack is in a thermal runaway state if the resistance value is less than a set first resistance value and if the cell voltage and cell temperature information are abnormal.

[0097] In the above technical solution, the detection device for the battery pack is disposed inside the battery pack and includes a first metal plate, a second metal plate, and a processor. The first metal plate includes a first end and a second end, and the second metal plate includes a third end and a fourth end. Furthermore, the first end and the third end are respectively connected to the processor, and a gap exists between the second end and the fourth end. In this way, the processor can detect the resistance value between the first end and the third end and quickly identify thermal runaway or coolant leakage phenomena in the battery pack based on the resistance value.

[0098] This disclosure also provides a vehicle including a detection device for the battery pack provided in this disclosure.

[0099] Figure 9 This is a block diagram illustrating a vehicle 900 according to an exemplary embodiment. For example, vehicle 900 may be a hybrid vehicle or an electric vehicle. Vehicle 900 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle. Vehicle 900 may include the battery pack detection device provided in this disclosure.

[0100] Reference Figure 9 The vehicle 900 may include various subsystems, such as an infotainment system 910, a perception system 920, a decision control system 930, a drive system 940, and a computing platform 950. The vehicle 900 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and component of the vehicle 900 can be interconnected via wired or wireless means.

[0101] In some embodiments, the infotainment system 910 may include a communication system, an entertainment system, and a navigation system, etc.

[0102] The perception system 920 may include several sensors for sensing information about the environment surrounding the vehicle 900. For example, the perception system 920 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0103] The decision control system 930 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0104] The drive system 940 may include components that provide powered motion to the vehicle 900. In one embodiment, the drive system 940 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0105] Some or all of the functions of the vehicle 900 are controlled by a computing platform 950. The computing platform 950 may include at least one processor 951 and a memory 952, the processor 951 being able to execute instructions 953 stored in the memory 952.

[0106] Processor 951 can be any conventional processor, such as a commercially available CPU. Processors may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems-on-chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0107] The memory 952 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0108] In addition to instruction 953, memory 952 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 952 can be used by computing platform 950.

[0109] In this embodiment of the disclosure, the processor 951 may execute instructions 953 to complete all or part of the steps of the above-described battery pack detection method.

[0110] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the above-described battery pack detection method when executed by the programmable device.

[0111] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0112] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery pack testing device, characterized in that, The detection device, disposed inside the battery pack, includes a first metal sheet, a second metal sheet, and a processor. The first metal sheet includes a first end and a second end, and the second metal sheet includes a third end and a fourth end. A housing is also present, with a cavity formed inside the housing and a through hole communicating with the cavity. The first metal sheet passes through the housing, having a first end located inside the cavity and a second end located outside the housing; the second metal sheet passes through the housing, having a third end located outside the housing and a fourth end located inside the cavity. The first end and the third end are respectively connected to the processor, and there is a gap between the second end and the fourth end. The second end and the fourth end can be heated and deformed to contact when the temperature is higher than a preset temperature. The processor is used to detect the resistance value between the first terminal and the third terminal, and the resistance value is used to determine whether the battery pack is in a thermal runaway state. The processor is further configured to determine that the battery pack is in a coolant leakage state when the resistance value is within a set resistance value range.

2. The battery pack detection device according to claim 1, characterized in that, The processor is configured to, when the resistance value is less than a set first resistance value, acquire the cell voltage information and cell temperature information of the battery pack; and, when the cell voltage information and cell temperature information are abnormal, determine that the battery pack is in a thermal runaway state.

3. The battery pack detection device according to claim 1, characterized in that, The detection device is located at any corner inside the battery pack housing.

4. The battery pack detection device according to claim 1, characterized in that, The battery includes a water-cooled plate, and the detection device is located within a preset area at the connection between the water-cooled plate and the coolant pipe.

5. A method for testing a battery pack, characterized in that, The detection apparatus applied to the battery pack according to any one of claims 1 to 4, the method comprising: Obtain the resistance value between the first end of the first metal sheet and the third end of the second metal sheet; Determine whether the battery pack is in a thermal runaway state based on the resistance value; If the resistance value is within a set resistance value range, it is determined that the battery pack is in a coolant leakage state.

6. The method according to claim 5, characterized in that, The step of determining whether the battery pack is in a thermal runaway state based on the resistance value includes: When the resistance value is less than a set first resistance value, the cell voltage information and cell temperature information of the battery pack are obtained; If the cell voltage and cell temperature information are abnormal, it is determined that the battery pack is in a state of thermal runaway.

7. The method according to claim 6, characterized in that, include: If the battery pack is in a state of thermal runaway, a first warning message will be issued; or, A second warning message is issued if the battery pack is in a state of coolant leakage.

8. A vehicle, characterized in that, The detection device includes the battery pack according to any one of claims 1 to 4.

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