Battery pack temperature detection method and detection system, battery pack and vehicle

Abstract

The invention provides a battery pack temperature detection method and system, a battery pack and a vehicle. The detection method comprises the following steps: providing a plurality of acquisition units, wherein each acquisition unit corresponds to each battery cell and acquires temperature information of each battery cell in a non-contact manner; obtaining a thermal imaging image, wherein the thermal imaging image comprises a plurality of detection areas corresponding to the plurality of acquisition units; and on the basis that the temperature value of one or more detection areas in the thermal imaging image exceeds a set threshold value, judging that one or more battery cells corresponding to the one or more detection areas have temperature abnormity. According to the battery pack disclosed by the invention, the temperature information of each battery cell is acquired in a non-contact manner through the acquisition unit, the layout of the acquisition unit is facilitated, the temperature conditions of the battery cells are effectively and reliably monitored in real time, and the thermal safety performance of the battery pack in the actual use process is ensured. The detection method and the detection system disclosed by the invention are economical in cost and easy to implement, can be implemented by simply modifying an existing battery pack structure, and are high in applicability.

Description

Technical Field

[0001] This disclosure generally relates to the field of vehicles, and in particular to the field of power battery systems for new energy vehicles. More specifically, it relates to a method for detecting the temperature of a battery pack, a detection system, a battery pack using the detection system, a vehicle, a control unit for implementing the detection method, a computer-readable storage medium, and a computer program product. Background Technology

[0002] With the increasing popularity of new energy vehicles, higher and higher requirements are being placed on battery pack technology, a key technology for these vehicles. During the charging and discharging cycles of a battery, it generates heat. In certain emergency situations, the battery temperature can rise above a critical temperature, leading to thermal runaway and subsequent safety issues through heat diffusion. During thermal runaway, the exothermic reaction inside the battery causes the battery temperature to rise rapidly, and heat diffusion can cause serious damage to the vehicle and may ultimately lead to safety accidents such as fires and explosions.

[0003] To ensure battery pack safety, current methods employ negative temperature coefficient (NTC) thermistors to monitor and collect temperature information from the battery cells within the pack, providing warnings in the event of thermal runaway. An NTC thermistor is a sensor whose resistance decreases with increasing temperature. Due to cost limitations and the limited number of sampling channels, it's not possible to assign a dedicated NTC thermistor to each cell. In other words, typically, 4 to 8 cells within the battery pack share a single NTC thermistor via a sampling harness. This means that during thermal runaway, if the cell triggering the runaway is far from the NTC thermistor, the battery management system (BMS) will be unable to quickly and accurately obtain its temperature information, thus failing to issue a timely alarm. Furthermore, to measure the cell temperature, the NTC thermistor needs to be in contact with the cell, which is detrimental to its layout and positioning within the battery pack and increases operational complexity. Summary of the Invention

[0004] The purpose of this disclosure is to solve the problems existing in the prior art and to provide a method and system for detecting the temperature of a battery pack, so as to monitor the temperature of each cell inside the battery pack in real time in a cost-effective and reliable manner, so as to obtain timely and accurate temperature information to improve the safety and reliability of the battery pack.

[0005] Therefore, according to one aspect of this disclosure, a method for detecting the temperature of a battery pack is provided, the battery pack including multiple battery cells, the detection method comprising: providing multiple acquisition units, each acquisition unit corresponding to a specific battery cell and acquiring temperature information of each battery cell in a non-contact manner; acquiring a thermal imaging image, the thermal imaging image including multiple detection areas corresponding to the multiple acquisition units; and determining that one or more battery cells corresponding to one or more detection areas have a temperature abnormality based on the temperature value of one or more detection areas in the thermal imaging image exceeding a set threshold.

[0006] Based on the above technical concept, the embodiments of this disclosure may further include any one or more of the following optional forms.

[0007] In some alternative configurations, the acquisition unit is configured to acquire and export the infrared radiation emitted by each battery cell.

[0008] In some alternative forms, the thermal imaging image is acquired by an infrared thermal imaging camera during the step of acquiring the thermal imaging image.

[0009] In some alternative forms, the detection method further includes: converging temperature information collected by multiple acquisition units to the infrared thermal imaging camera before acquiring a thermal imaging image.

[0010] In some alternative forms, the detection method further includes generating an alarm signal after determining that one or more of the battery cells have an abnormal temperature.

[0011] In some alternative forms, the alarm signal is displayed via the thermal imaging image and / or via an alarm.

[0012] According to another aspect of this disclosure, a battery pack temperature detection system is provided, the battery pack including multiple battery cells, the detection system including: multiple acquisition units, each acquisition unit corresponding to each battery cell and configured to acquire temperature information of each battery cell in a non-contact manner; a thermal imaging unit configured to acquire a thermal imaging image, the thermal imaging image including multiple detection areas corresponding to the multiple acquisition units; and a judgment unit configured to determine that one or more battery cells corresponding to one or more detection areas have a temperature abnormality based on the temperature value of one or more detection areas in the thermal imaging image exceeding a set threshold.

[0013] In some alternative configurations, the acquisition unit is constructed as a light guide strip to acquire infrared radiation emitted by each battery cell in a non-contact manner and guide the infrared radiation to the thermal imaging unit.

[0014] In some alternative forms, the light guide strip is arranged adjacent to the battery cell and has an incident surface that is generally parallel to the surface of the battery cell and an exit surface that guides infrared light to the thermal imaging unit. The light guide strip also has a reflective surface that is angled to the incident surface and / or the exit surface.

[0015] In some alternative forms, the reflecting surface is tilted at 45 degrees relative to the incident surface and / or the exit surface.

[0016] In some alternative forms, the reflective surface is coated or adhered with a light-shielding material.

[0017] In some alternative configurations, the thermal imaging unit is configured as an infrared thermal imaging camera.

[0018] In some alternative configurations, the detection system further includes an aggregation unit for converging temperature information collected by multiple acquisition units to the thermal imaging unit.

[0019] In some alternative configurations, the focusing unit is constructed as a focusing lens and has an incident light surface arranged adjacent to a plurality of the acquisition units and an exit light surface facing the thermal imaging unit.

[0020] In some alternative embodiments, the detection system further includes an alarm unit configured to issue an alarm signal in response to the determination unit determining that one or more of the battery cells have an abnormal temperature.

[0021] In some alternative forms, the detection system further includes a display unit configured to display the thermal imaging image.

[0022] According to another aspect of this disclosure, a battery pack is provided, the battery pack including a housing, a plurality of battery cells housed within the housing, and a battery management system, the battery pack further including the aforementioned battery pack temperature detection system, the detection system communicating with the battery management system, and the acquisition unit and thermal imaging unit of the detection system being arranged on the housing.

[0023] According to another aspect of this disclosure, a control unit is provided, the control unit including a memory and at least one processor, the memory storing computer-executable instructions that, when executed by the at least one processor, cause the at least one processor to perform the above-described battery pack temperature detection method.

[0024] According to another aspect of this disclosure, a vehicle is provided, the vehicle including the above-described battery pack temperature detection system or the above-described battery pack or control unit.

[0025] According to another aspect of this disclosure, a computer-readable storage medium is provided having computer-executable instructions stored thereon, which, when executed, implement the above-described method for detecting battery pack temperature.

[0026] According to another aspect of this disclosure, a computer program product is provided, including computer-executable instructions that, when executed by at least one processor, implement the above-described method for detecting battery pack temperature.

[0027] The battery pack temperature detection method and system disclosed herein acquire temperature information of each cell in a non-contact manner through a data acquisition unit. This facilitates the layout of the data acquisition unit and effectively and reliably monitors the temperature of the cells in real time, ensuring the thermal safety performance of the battery pack during actual use. The detection method and system disclosed herein are cost-effective, easy to implement, and can be implemented with simple modifications to existing battery pack structures, making them highly applicable. Attached Figure Description

[0028] Other features and advantages of this disclosure will be better understood through the following detailed description of alternative embodiments in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic flowchart of a battery pack temperature detection method according to one embodiment of the present disclosure;

[0030] Figure 2 This is a schematic block diagram of a battery pack temperature detection system according to one embodiment of the present disclosure;

[0031] Figure 3 This is a schematic diagram of multiple battery cells equipped with a detection system according to one embodiment of the present disclosure;

[0032] Figure 4 yes Figure 3 A top view of multiple battery cells shown;

[0033] Figure 5 yes Figure 3 A partially enlarged schematic diagram of multiple battery cells shown;

[0034] Figure 6 and Figure 5 Similarly, a partially enlarged schematic diagram of the battery cell is shown from another perspective;

[0035] Figure 7 yes Figure 3 A side view of multiple battery cells shown;

[0036] Figure 8 This is a schematic diagram of a control unit according to one embodiment of the present disclosure. Detailed Implementation

[0037] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using this disclosure, and are not intended to limit the scope of this disclosure. The descriptions of the structural positions of various components, such as up, down, top, bottom, etc., are not absolute but relative. These directional descriptions are appropriate when the various components are arranged as shown in the figures, but they change accordingly when the positions of the various components in the figures change.

[0038] Furthermore, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of the methods and systems according to various embodiments of this disclosure. It should be noted that the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0039] In this document, the expressions "including" or similar synonyms such as "having" are open-ended and do not exclude additional unlisted elements, steps, or components. In this document, "multiple" means two or more, unless otherwise explicitly specified. In this document, unless otherwise explicitly stated and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0040] Power battery packs used in new energy vehicles provide operating power and / or drive power to the vehicle. A battery pack typically consists of multiple cells or battery units, a battery management system, a casing, and corresponding accessories. Most existing methods for preventing battery pack thermal runaway are passive protection methods, meaning protective measures are taken after thermal runaway has already occurred. The drawback of this approach is that if the protection measures fail, the risks associated with thermal runaway cannot be avoided. Therefore, more and more manufacturers are looking to monitor and collect the temperature information of the cells within the battery pack to ensure the safety of the battery pack during vehicle use. It has been recognized that NTC thermistors used for monitoring and collecting internal temperature information of the battery pack are expensive and inconvenient to install, and cannot quickly and accurately obtain cell temperature information, thus failing to issue timely warnings and posing safety hazards.

[0041] Based on the concept of this disclosure, a method for detecting the temperature of a battery pack is provided, combined with... Figure 1 As shown, a detection method according to one embodiment of this disclosure includes:

[0042] S1 provides multiple acquisition units, each of which corresponds to a battery cell and acquires the temperature information of each battery cell in a non-contact manner.

[0043] S2, acquire a thermal imaging image, the thermal imaging image including multiple detection areas corresponding to the multiple acquisition units respectively;

[0044] S3, based on the temperature value of one or more detection areas in the thermal imaging image exceeding a set threshold, it is determined that one or more battery cells corresponding to one or more detection areas have temperature anomalies.

[0045] By employing a non-contact acquisition method, the layout of the acquisition unit within the battery pack is easy to implement and facilitates the arrangement of sampling channels, without affecting the normal operation of the battery cells. It should be understood that objects with temperatures above absolute zero (i.e., -273.15℃) can emit infrared radiation. For battery cells, the operating temperature is typically between -25℃ and 55℃. At different temperatures, the battery cells emit infrared radiation of different wavelengths; the higher the surface temperature of the battery cell, the shorter the emitted or radiated infrared wavelength, and vice versa. Therefore, by acquiring the infrared radiation emitted by the battery cells, temperature information related to the current temperature status of the cells can be obtained. Furthermore, by observing the temperature values ​​of the corresponding detection areas in the thermal imaging image, the temperature of each battery cell can be obtained in real time, resulting in high detection efficiency and accurate and reliable results. This also facilitates temperature monitoring of all battery cells within the battery pack, enabling timely and accurate thermal runaway warnings (or low temperature warnings), ensuring the reliability and safety of the battery pack.

[0046] Based on the above concept, this disclosure also provides a battery pack temperature detection system, which can perform the above-described battery pack temperature detection method. Combined with... Figure 2 As shown, the detection system 100 mainly includes multiple acquisition units 110, a thermal imaging unit 120, and a judgment unit 130. The multiple acquisition units 110 correspond to each individual battery cell and are configured to acquire the temperature information of each cell in a non-contact manner, for example, by performing... Figure 1 Step S1 of the detection method shown. The thermal imaging unit 120 is configured to acquire a thermal imaging image, which includes multiple detection areas corresponding to multiple acquisition units 110, for example, performing... Figure 1 Step S2 of the detection method shown. The judgment unit 130 is configured to determine that one or more battery cells corresponding to one or more detection areas have a temperature abnormality based on the temperature value of one or more detection areas in the thermal imaging image exceeding a set threshold, for example, by executing... Figure 1 Step S3 of the detection method shown.

[0047] It should be understood that "non-contact" here means that the acquisition unit does not need to contact the battery cell to collect temperature information. When the detection system is applied to a battery pack, the battery pack includes a housing and a battery management system. Multiple battery cells are housed within the housing. The detection system can communicate with the battery management system, and the acquisition unit and thermal imaging unit of the detection system can be arranged on the housing. In this way, the acquisition unit corresponding to each battery cell can be pre-arranged on the housing at the position corresponding to the battery cell, for example, by attaching it to the top cover of the housing through adhesive bonding. After the battery cell is installed in the housing, the acquisition unit already arranged on the top cover of the housing can realize non-contact acquisition of temperature information associated with the battery cell, avoiding the complex process of installing the acquisition unit onto the battery cell and simplifying the arrangement process of the acquisition unit.

[0048] Advantageously, the acquisition unit is configured to acquire and export the infrared radiation emitted by each battery cell. For example... Figures 3 to 7 In one embodiment shown, multiple battery cells 200 are arranged side by side, and each battery cell 200 is provided with a corresponding acquisition unit 110. In some embodiments, the acquisition unit 110 may be constructed as a light guide strip to acquire the infrared light emitted by each battery cell 200 in a non-contact manner.

[0049] In the illustrated embodiment, the acquisition unit 110 or light guide strip is arranged adjacent to the battery cell 200 and has an incident surface 110a that is substantially parallel to the surface of the battery cell 200 and an exiting surface 110b that guides infrared light. It also has a reflecting surface 110c that is at an angle to the incident surface 110a and / or the exiting surface 110b. Figure 6The illustrated light guide structure shows two opposing reflective surfaces 110c, with the incident surface 110a and the exit surface 110b configured on a single plane. In this embodiment, the reflective surface 110c is tilted, for example, at 45 degrees relative to the incident surface 110a and / or the exit surface 110b, so that most of the infrared light entering from the incident surface 110a can be reflected by one reflective surface 110c to be substantially parallel to the incident surface 110a and transmitted within the light guide, then reflected by the other reflective surface 110c and exited from the exit surface 110b. It should be understood that the configuration of the light guide is not limited to that shown in the figure; any configuration that can guide the infrared light entering the light guide and exit from the exit surface is acceptable, such as a parallelogram or other suitable configuration.

[0050] exist Figures 3 to 7 In the illustrated embodiment, the multiple battery cells 200 are shown in four groups as an example. Each group of battery cells 200 is equipped with a detection system 100. That is, each detection system 100 includes multiple acquisition units 110 and corresponding thermal imaging units 120 and focusing units 140. For each group of battery cells, the length of each acquisition unit or light guide is different. The light guide corresponding to the battery cell closer to the thermal imaging unit is shorter, and vice versa. Even if there is light interaction between adjacent light guides, due to the design of the light guide's own structure (especially the reflective surface) and the fact that the thermal imaging image includes multiple detection areas corresponding to the multiple acquisition units 110, the transmission of infrared rays in each light guide is not significantly interfered with, ensuring accurate transmission of the temperature information of each battery cell. In addition, in some embodiments, the number and / or position of the multiple groups of battery cells in the battery pack are not the same. The detection systems of the same arrangement of battery cells can be integrated according to actual needs, thereby reducing, for example, the number of thermal imaging units 120 and / or focusing units 140 shown in the figure.

[0051] The light guide strip can be made of a transparent material to facilitate light transmission, such as, but not limited to, plastics, glass, optical fibers, polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), and polycarbonate (PC). Advantageously, a light-shielding material can be coated or adhered to the reflective surface 110c of the light guide strip. The light-shielding material may include, but is not limited to, a light-shielding reflective film or coating made of polyester fiber, glass fiber, etc., and may be a color that facilitates light reflection, such as gold or silver, without limitation.

[0052] Advantageously, in step S2 of the detection method, the thermal imaging image is acquired via an infrared thermal imaging camera. In other words, the thermal imaging unit 120 of the detection system 100 is configured as an infrared thermal imaging camera. The infrared thermal imaging camera is capable of accurately capturing thermal radiation and detecting temperature differences, then converting them into a visible image, thereby providing accurate and visual detection results. The thermal imaging unit 120 may be powered by and communicate with a battery management system.

[0053] Advantageously, in step S3 of the detection method, if the temperature value of the detection area exceeds a set threshold, it is determined that the corresponding battery cell has a temperature anomaly. This set threshold can be selected according to actual needs, for example, 55℃. When the temperature value of the detection area exceeds 55℃, it can be determined that the corresponding battery cell has a high-temperature anomaly. Alternatively, the set threshold can be selected to have a certain temperature difference from the normal operating temperature of the battery cell, such as 57℃, 60℃, or 65℃. It should be understood that the smaller the temperature difference between the set threshold and the normal operating temperature, the higher the detection accuracy, but this may lead to too many anomalies and increase the detection burden. Conversely, the larger the temperature difference between the set threshold and the normal operating temperature, the lower the detection accuracy and the possibility of missed detections. Depending on the required detection accuracy, the set threshold can be set to a reasonable value, and no restrictions are imposed here.

[0054] In some embodiments, the detection method may further include: converging temperature information collected by multiple acquisition units to an infrared thermal imaging camera before acquiring a thermal imaging image. Correspondingly, in some embodiments, the detection system 100 further includes an aggregation unit 140 for converging temperature information collected by multiple acquisition units 110 to a thermal imaging unit 120. Figures 3 to 7 In the illustrated embodiment, the focusing unit 140 can be configured as a condensing lens, and has an incident light surface 140a arranged adjacent to a plurality of acquisition units 110 and an exit light surface 140b facing the thermal imaging unit 120. Depending on different needs, the condensing lens may also have other configurations, which are not limited here. Similarly, the thermal imaging unit 120 and the focusing unit 140 can also be arranged on the housing of the battery pack. In some embodiments, when the thermal imaging unit 120 uses a wide-angle thermal imaging camera, the focusing unit 140 is not required.

[0055] In some embodiments, the detection method may further include generating an alarm signal after determining that one or more battery cells have an abnormal temperature. In this manner, the alarm signal may include a battery pack temperature abnormality alarm and / or an alarm indicating the location of a battery cell with an abnormal temperature. In some embodiments, the alarm signal may be displayed via a thermal imaging image and / or via an alarm. Accordingly, in some embodiments, the detection system 100 may further include an alarm unit (not shown) configured to issue an alarm signal in response to the determination unit's determination that one or more battery cells have an abnormal temperature. As an example, the alarm module may be an alarm, which may provide real-time alarm via color change and / or sound.

[0056] In some embodiments, the detection system 100 may further include a display unit (not shown) configured to display thermal imaging images. The display unit may be, for example, a monitor or display screen, and may be configured to display thermal imaging images from the thermal imaging unit 120 and / or alarm signals from the alarm unit, showing the thermal imaging image of the cell temperature status and / or the location of cells with abnormal temperatures and / or alarms on the display screen for visual visualization.

[0057] As can be seen from the above description, this disclosure provides a non-contact temperature information acquisition unit and uses the temperature value of the detection area in the thermal imaging image corresponding to the acquisition unit to determine whether there is a temperature anomaly in the battery cell. This improves detection accuracy and shortens detection time, enabling monitoring of the temperature status of all battery cells in the battery pack at a significantly reduced cost. It also improves detection efficiency, optimizes the layout of sampling channels, and reduces the number of sampling channels, ensuring the safety and reliability of the battery pack. Furthermore, this disclosure can be easily implemented by modifying existing battery pack casings, featuring a simple structure, high detection accuracy, stable performance, economic cost, and strong versatility.

[0058] Combination Figure 8 As shown, this disclosure also provides a control unit 300, which may include a memory 310 and at least one processor 320. The memory 310 may store computer-executable instructions 311, which may be executed by at least one processor 320. When executing the computer-executable instructions 311, the at least one processor 320 implements the detection method according to the above embodiments.

[0059] This disclosure also provides a vehicle that includes the above-described battery pack temperature detection system or a battery pack having the detection system or the above-described control unit.

[0060] Depending on the specific needs, the control unit may include at least one of a vehicle control unit, a remote control unit, an electronic control unit for a thermal imaging unit, and an electronic control unit for a battery management system. It is understood that the components included in the control unit 300 are not limited to the memory 310 and the processor 320, and may vary depending on the specific requirements. Exemplarily, the control unit 300 may also include multiple components connected to its input / output interfaces, including but not limited to: input units, such as a keyboard, mouse, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as semiconductor storage devices, magnetic surface storage devices, optical storage devices, etc.; and communication units, such as network interface cards, wireless transceivers, etc. The communication unit allows the computing device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0061] In some embodiments, memory 310 may include, for example, random access memory (RAM) or read-only memory (ROM). Memory 310 may be used to store instructions, programs, code, and other programs and data required by control unit 300, but is not limited thereto. Additionally, processor 320 may be a central processing unit (CPU) or other general-purpose processors, such as digital signal processing (DSP), field-programmable gate array (FPGA), programmable logic array (PLA), etc.

[0062] Alternatively, the above-described detection methods can be implemented using a computer-readable storage medium. The computer-readable storage medium carries computer-executable instructions for performing the various embodiments of this disclosure. The computer-readable storage medium can be a tangible device capable of holding and storing instructions used by an instruction execution device. The computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (not exhaustive) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combinations thereof. The computer-readable storage medium used herein is not to be interpreted as a transient signal itself, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0063] In some embodiments, this disclosure also provides a computer program product tangibly stored on a computer-readable storage medium and including computer-executable instructions that, when executed by at least one processor, implement the detection method according to the above embodiments.

[0064] Generally, the various example embodiments of this disclosure can be implemented in hardware or dedicated circuitry, software, firmware, logic, or any combination thereof. Some aspects may be implemented in hardware, while others may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device. When aspects of embodiments of this disclosure are illustrated or described as block diagrams, flowcharts, or using some other graphical representation, it will be understood that the blocks, apparatuses, systems, techniques, or methods described herein can be implemented as non-limiting examples in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0065] The computer-executable instructions or computer program products used to execute the various embodiments of this disclosure can also be stored in the cloud. When needed, users can access the computer-executable instructions stored in the cloud for executing an embodiment of this disclosure via mobile internet, fixed network or other networks, thereby implementing the technical solutions disclosed in the various embodiments of this disclosure.

[0066] It should be understood here that the embodiments shown in the figures only illustrate the optional shapes, sizes and arrangements of the battery pack temperature detection system according to this disclosure, and are not intended to limit the scope of the disclosure. Other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the disclosure.

[0067] The technical content and features of this disclosure have been disclosed above. However, it is understood that those skilled in the art can make various changes and improvements to the above-disclosed concept under the inventive concept of this disclosure, but all such changes and improvements fall within the protection scope of this disclosure. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of this disclosure is determined by the claims.

Claims

1. A method for detecting the temperature of a battery pack, the battery pack comprising multiple battery cells, characterized in that, The detection method includes: Multiple acquisition units are provided, each of which corresponds to a battery cell and acquires the temperature information of each battery cell in a non-contact manner (S1); Acquire a thermal imaging image, the thermal imaging image including multiple detection areas corresponding to multiple acquisition units (S2); Based on the fact that the temperature value of one or more detection areas in the thermal imaging image exceeds a set threshold, it is determined that one or more battery cells corresponding to one or more detection areas have a temperature abnormality (S3).

2. The method for detecting battery pack temperature according to claim 1, characterized in that, The acquisition unit is configured to acquire the infrared radiation emitted by each battery cell and export the infrared radiation.

3. The method for detecting battery pack temperature according to claim 1, characterized in that, In the step of acquiring thermal imaging images, the thermal imaging images are acquired by an infrared thermal imaging camera.

4. The method for detecting battery pack temperature according to claim 3, characterized in that, The detection method further includes: before acquiring a thermal imaging image, converging the temperature information collected by multiple acquisition units to the infrared thermal imaging camera.

5. The method for detecting the temperature of a battery pack according to any one of claims 1 to 4, characterized in that, The detection method further includes generating an alarm signal after determining that one or more of the battery cells have an abnormal temperature.

6. The method for detecting battery pack temperature according to claim 5, characterized in that, The alarm signal is displayed via the thermal imaging image and / or via an alarm.

7. A battery pack temperature detection system, the battery pack comprising a plurality of battery cells (200), characterized in that, The detection system (100) includes: Multiple acquisition units (110) are provided, each of which corresponds to a battery cell (200) and is configured to acquire the temperature information of each battery cell (200) in a non-contact manner. A thermal imaging unit (120) is configured to acquire a thermal imaging image, the thermal imaging image including a plurality of detection areas corresponding to a plurality of acquisition units (110); The judgment unit (130) is configured to determine that one or more battery cells (200) corresponding to one or more detection areas have a temperature abnormality based on the temperature value of one or more detection areas in the thermal imaging image exceeding a set threshold.

8. The battery pack temperature detection system according to claim 7, characterized in that, The acquisition unit (110) is constructed as a light guide strip to acquire infrared rays emitted by each battery cell (200) in a non-contact manner and guide the infrared rays to the thermal imaging unit (120).

9. The battery pack temperature detection system according to claim 8, characterized in that, The light guide strip is arranged adjacent to the battery cell (200) and has an incident surface (110a) that is substantially parallel to the surface of the battery cell (200) and an exit surface (110b) that guides infrared rays to the thermal imaging unit (120). The light guide strip also has a reflective surface (110c) that is angled to the incident surface (110a) and / or the exit surface (110b).

10. The battery pack temperature detection system according to claim 9, characterized in that, The reflecting surface (110c) is inclined at 45 degrees relative to the incident surface (110a) and / or the exit surface (110b).

11. The battery pack temperature detection system according to claim 9, characterized in that, The reflective surface (110c) is coated or pasted with a light-shielding material.

12. The battery pack temperature detection system according to any one of claims 7 to 11, characterized in that, The thermal imaging unit (120) is configured as an infrared thermal imaging camera.

13. The battery pack temperature detection system according to any one of claims 7 to 11, characterized in that, The detection system (100) further includes an aggregation unit (140) for aggregating temperature information collected by multiple acquisition units (110) to the thermal imaging unit (120).

14. The battery pack temperature detection system according to claim 13, characterized in that, The focusing unit (140) is constructed as a focusing lens and has an incident light surface (140a) arranged adjacent to the plurality of acquisition units (110) and an exit light surface (140b) facing the thermal imaging unit (120).

15. The battery pack temperature detection system according to any one of claims 7 to 11, characterized in that, The detection system (100) further includes an alarm unit configured to issue an alarm signal in response to the judgment unit (130) determining that one or more of the battery cells (200) have an abnormal temperature.

16. The battery pack temperature detection system according to any one of claims 7 to 11, characterized in that, The detection system (100) further includes a display unit configured to display the thermal imaging image.

17. A battery pack, the battery pack comprising a housing, a plurality of battery cells housed within the housing, and a battery management system, characterized in that, The battery pack further includes a battery pack temperature detection system according to any one of claims 7 to 16, the detection system communicating with the battery management system, and the acquisition unit and thermal imaging unit of the detection system being arranged on the housing.

18. A control unit, the control unit comprising a memory and at least one processor, the memory storing computer-executable instructions, characterized in that, When the computer-executable instructions are executed by the at least one processor, the at least one processor performs the method for detecting the battery pack temperature according to any one of claims 1 to 6.

19. A vehicle, characterized in that, The vehicle includes a battery pack temperature detection system according to any one of claims 7 to 16, or a battery pack according to claim 17, or a control unit according to claim 18.

20. A computer-readable storage medium having computer-executable instructions stored thereon, characterized in that, When the computer-executable instructions are executed, they implement the method for detecting the battery pack temperature according to any one of claims 1 to 6.

21. A computer program product comprising computer-executable instructions, characterized in that, When the computer-executable instructions are executed by at least one processor, they implement the method for detecting the temperature of the battery pack according to any one of claims 1 to 6.

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