Power battery thermal management method and device, computer device, and storage medium

Abstract

The application relates to the technical field of batteries, in particular to a power battery thermal management method and device, computer equipment and a storage medium. The method comprises the following steps: collecting internal battery temperature data under the condition that the temperature of the battery is adjusted by a temperature self-adjusting unit arranged outside the battery; and sending the internal battery temperature data to a warning unit through a target wave band; wherein the warning unit is used for determining the working state of the battery according to the internal battery temperature data and the material system of the battery, and generating a warning information when the working state of the battery is abnormal. The application can effectively manage the heat of the power battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a method, apparatus, computer equipment, and storage medium for thermal management of power batteries. Background Technology

[0002] Temperature has a significant impact on the charge retention capacity, cycle life, and battery safety of power batteries. Therefore, it is crucial to maintain the operating temperature of power batteries at the optimal operating temperature (between 10-30℃) through reasonable means.

[0003] Currently, battery thermal management units in the industry are not real-time enough in terms of temperature sensing, or are unable to provide proactive warnings and autonomous temperature adjustment, so improvements are urgently needed. Summary of the Invention

[0004] Therefore, it is necessary to provide a power battery thermal management method, device, computer equipment, and storage medium that can effectively manage the thermal of power batteries, addressing the aforementioned technical problems.

[0005] In a first aspect, this application provides a thermal management method for a power battery, the method comprising:

[0006] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0007] The battery's internal temperature data is sent to the early warning unit via the target frequency band.

[0008] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0009] In one embodiment, collecting battery internal temperature data includes:

[0010] The internal temperature data of the battery is collected by an implanted temperature sensor that is placed in the pre-wound layer of the electrode separator inside the battery.

[0011] In one embodiment, transmitting battery internal temperature data to an early warning unit via a target wavelength band includes:

[0012] The internal temperature data of the battery is modulated and transmitted to the early warning unit via the target band.

[0013] In one embodiment, the target band is a band with a frequency less than 100 Hz.

[0014] In one embodiment, the temperature self-regulating unit includes:

[0015] The inner layer of temperature-controlled phase change material is located on the outside of the battery;

[0016] The outer layer of temperature-controlled deformation material is located on the outside of the inner layer of temperature-controlled phase change material.

[0017] In one embodiment, the temperature self-regulating unit has a non-enclosed structure.

[0018] Secondly, this application also provides a power battery thermal management device, the device comprising:

[0019] The data acquisition module is used to acquire internal battery temperature data when the battery temperature is regulated by an externally mounted temperature self-regulating unit.

[0020] The transmission module is used to send the battery's internal temperature data to the early warning unit via the target frequency band;

[0021] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0022] Thirdly, this application also provides a computer device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0023] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0024] The battery's internal temperature data is sent to the early warning unit via the target frequency band.

[0025] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0026] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0027] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0028] The battery's internal temperature data is sent to the early warning unit via the target frequency band.

[0029] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0030] Fifthly, this application also provides a computer program product comprising a computer program that, when executed by a processor, performs the following steps:

[0031] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0032] The battery's internal temperature data is sent to the early warning unit via the target frequency band.

[0033] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0034] The aforementioned power battery thermal management methods, devices, computer equipment, storage media, and computer program products include an externally mounted temperature self-regulating unit that can autonomously control the temperature based on changes in the external temperature, ensuring the battery operates at a suitable temperature. This contrasts with the traditional method of first detecting an abnormal temperature and then issuing a temperature regulation command before taking action. This effectively saves the external energy required for temperature regulation and prevents short-term periods of abnormal battery operating temperature. Furthermore, by collecting the internal temperature of the battery and issuing an external warning unit, the system can alert the user to any abnormal battery status, allowing the user to take timely and effective measures to address the battery's abnormal condition, thus enabling effective thermal management of the power battery. Attached Figure Description

[0035] Figure 1 This is an application environment diagram of a power battery thermal management method in one embodiment;

[0036] Figure 2 This is a flowchart illustrating a power battery thermal management method in one embodiment;

[0037] Figure 3 This is a structural block diagram of a power battery thermal management device in one embodiment;

[0038] Figure 4 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] With the increasing popularity of new energy vehicles, represented by electric vehicles, power batteries, as core energy supply devices, have become particularly important. The performance and safety of power batteries have become the focus of consumers' attention. Solving the temperature control problem of power batteries through reasonable and effective means is key to improving their performance and safety. It is well known that among all environmental factors, temperature has the greatest impact on the charging and discharging performance of power batteries: in high-temperature environments, side reactions in the battery accelerate, the performance of battery materials degrades during charging at high temperatures, and the battery cycle life is greatly shortened. Excessive temperature can also cause safety problems such as bulging, separator deformation, electrolyte decomposition, and even explosions due to thermal runaway. In low-temperature environments, the kinetic processes of battery active materials slow down, electrolyte viscosity and internal resistance increase, the reaction rate slows down, and the battery's discharge capacity and output power decrease. Prolonged operation and charging / discharging of batteries in low-temperature environments can also cause lithium deposition on the anode surface, causing irreversible damage to battery capacity and thus affecting the vehicle's range. Therefore, if... Figure 1 As shown, this embodiment provides a power battery thermal management system, including:

[0041] An implanted temperature acquisition module is used to detect and acquire the internal temperature of the battery in real time.

[0042] The temperature data conversion and transmission module converts and modulates the collected temperature data and transmits it to the next module.

[0043] Temperature signal receiving module, which receives temperature data transmitted from inside the battery;

[0044] The temperature data diagnostic module processes the received battery internal temperature data to determine the battery internal temperature status and whether the battery internal temperature exceeds the threshold range.

[0045] Specifically, the temperature data diagnostic module incorporates a pre-built algorithm model, which diagnoses the battery's working state and health status by mapping the internal temperature data of the battery with the battery material system, and determines whether the threshold is exceeded.

[0046] The temperature data transmission module converts the processed temperature data into a specific signal format and transmits it to the early warning unit.

[0047] The signal receiving module in the early warning unit receives and modulates the data sent from inside the battery and transmits it to the data processing module in the next early warning unit.

[0048] The data processing module in the early warning unit processes the data transmitted from the previous module, judges the safety and health status of the battery based on the internal temperature parameters of the battery, and sends the judgment result to the warning alarm module in the early warning unit.

[0049] The warning and alarm module in the early warning unit takes corresponding warning and alarm actions based on the judgment result instructions sent by the data processing module in the early warning unit.

[0050] In one embodiment, such as Figure 2 As shown, a power battery thermal management method is provided, which consists of... Figure 1 The temperature data conversion and transmission module in the system performs the following steps:

[0051] S101 collects internal battery temperature data while the battery temperature is regulated by a temperature self-regulating unit located outside the battery.

[0052] The temperature self-regulating unit consists of two layers: the inner layer uses a temperature-controlled phase change material, and the outer layer uses a temperature-controlled deformation material. The inner and outer layers are combined to create a temperature-adaptive coating, thus integrating the heat dissipation module and the insulation module into one unit.

[0053] Under normal conditions, the infrared emissivity of the inner layer temperature-controlled phase change material will remain at approximately 90% to dissipate heat. When the temperature drops, the infrared emissivity of the inner layer temperature-controlled phase change material will decrease to around 20%, activating the heat preservation mode. In hot weather, the temperature-controlled deformation material expands, causing the heterogeneous bilayer actuator to bend towards the environment. The perforated portion can directly transfer the battery's infrared radiation into the environment, while simultaneously enhancing air convection and strengthening the heat dissipation effect. In cold weather, the temperature-controlled deformation material thin-film actuator will return to its original flat shape. The actuator can reflect infrared radiation back to the battery while suppressing infrared radiation caused by its low infrared emissivity, helping to suppress heat loss and achieve the purpose of heat preservation.

[0054] S102 transmits the battery's internal temperature data to the early warning unit via the target band.

[0055] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0056] Correspondingly, the internal temperature of a battery with a specific material system varies under different health conditions. By processing and analyzing the temperature data collected inside the battery, the active materials of the internal electrodes, the health condition, and the working state of the battery can be determined.

[0057] Optionally, the information processing module of the alarm unit is embedded with a pre-built algorithm model, which determines whether to issue an instruction to execute an alarm based on the mapping relationship between the temperature data inside the battery and the battery safety status.

[0058] It is understandable that batteries with specific material systems have different internal temperatures under different health conditions. By processing and analyzing the temperature data collected inside the battery, the active materials of the internal electrodes, the health status, and the operating status can be determined. Temperature thresholds need to be set in advance, and these threshold parameters need to be set according to the optimal temperature range for each battery material system. Optionally, the warning module of the early warning unit issues an alarm signal after receiving data indicating that the temperature exceeds the threshold. The signal sent directionally to the external early warning unit can be sound waves or electromagnetic waves, but it must have strong penetrating power. The warning information issued by the early warning unit can be sound, image, or mechanical vibration, but it must be a stimulus form that is easily perceived by human senses and leaves a lasting impression.

[0059] In the aforementioned power battery thermal management method, the external temperature self-regulation unit can autonomously control the temperature according to changes in the external temperature, keeping the battery in a suitable operating temperature environment. This is unlike the traditional method of first detecting an abnormal temperature and then issuing a temperature regulation command before taking action. This effectively saves the additional external energy input for temperature regulation and also "prevents problems before they occur," avoiding short periods of abnormal battery operating temperature. The internal temperature of the battery is collected, and an external warning unit can issue an alert to the user regarding abnormal battery status. The user can then take timely and effective measures to address the abnormal battery status, thus enabling effective thermal management of the power battery.

[0060] In one embodiment, this embodiment provides an optional method for collecting internal battery temperature data. The specific implementation process may include: collecting internal battery temperature data through an implanted temperature sensor deployed in the pre-wound layer of the internal electrode separator of the battery.

[0061] Furthermore, the internal temperature data of the battery is modulated and transmitted to the early warning unit via the target band.

[0062] Optionally, the main component of the temperature acquisition module is a temperature-sensitive material sensor. Temperature data is received 1ms after the sensor in the implantable temperature acquisition module detects and acquires the data, and the acquisition cycle is 100ms. The implantation location / acquisition point includes, but is not limited to, the pre-wound layer of the electrode diaphragm.

[0063] The target band is the band with a frequency of less than 100 Hz.

[0064] In this embodiment, after temperature data acquisition, it is amplified and transmitted to the outside of the battery, where it is received by a signal receiving module. The signal containing temperature information emitted from inside the battery is processed to obtain internal battery temperature parameter data. This internal temperature parameter is modulated and directionally transmitted to the signal receiving module of the external warning unit. The battery parameter data transmission module modulates the internal battery data obtained from the reflected wave data processing module and transmits it to the outside of the battery via a specific frequency band. The signal emitted from inside the battery must have strong penetrating power, such as low-frequency sound waves (but not limited to sound waves), with a typical sound wave frequency of 100Hz.

[0065] In one embodiment, the temperature self-regulating unit includes: an inner layer of temperature-controlled phase change material disposed on the outside of the battery; an outer layer of temperature-controlled deformation material disposed on the outside of the inner layer of temperature-controlled phase change material; the inner and outer layers are combined to form a temperature-adaptive coating, i.e., the heat dissipation module and the heat insulation module are integrated into one unit.

[0066] Optionally, the thermosensitive phase change material is primarily vanadium dioxide, and the phase change temperature is controlled by adjusting the atomic percentage of doped tungsten. The thermosensitive deformation material is primarily polyethylene, with a copper metal layer deposited on its surface. Utilizing the mismatch in thermal expansion capabilities between the two layers, the heterogeneous bilayer actuator achieves both battery-oriented alignment and bending towards the external environment, thereby achieving both heat preservation and heat dissipation.

[0067] The temperature self-regulating unit consists of two layers, inner and outer, providing dual temperature control for a more significant effect. The inner layer is a temperature-sensitive phase change material, and the outer layer is a temperature-sensitive deformation material. The temperature self-regulating unit can be placed outside the battery module, without occupying the effective space inside the module used for cell placement, or it can be used individually for each cell without damaging the cell's structure and material properties. The main component of the temperature-sensitive phase change material is vanadium dioxide (vanadium dioxide can be used, but is not limited to this temperature-sensitive phase change material), with tungsten metal as a dopant. The phase change temperature (i.e., the self-regulating temperature) is controlled by changing the tungsten content. The temperature-sensitive deformation material acts as an "actuator" for polyethylene, while the copper plating on the polyethylene surface supports heat dissipation. The temperature self-regulating unit is not fully enclosed, facilitating the external transmission of internal temperature signals. The energy required for the autonomous temperature control unit to achieve temperature self-regulation comes from the phase change material and deformation material itself, without involving external energy interference or input. The energy required for the temperature sensing and diagnosis unit to collect, receive, process, and transmit signals between modules comes from the battery's internal electrical energy. The energy required for the early warning unit to receive signals, process data, and issue early warnings comes from outside the battery.

[0068] Furthermore, the temperature-sensitive phase change material and temperature-sensitive deformation material can sense changes in the ambient temperature of the battery in real time, and the inner and outer double-layer temperature control materials work together to regulate the battery temperature. The phase change material and deformation material that make up the temperature self-regulation unit can perform autonomous temperature control according to changes in the external temperature, so that the battery is in a suitable operating temperature environment, rather than the traditional mode of first detecting temperature abnormalities and then issuing temperature regulation commands and then taking temperature regulation actions. This can not only effectively save the additional external energy input for temperature regulation, but also "prevent problems before they occur".

[0069] Under high temperatures, the infrared emissivity of the inner layer temperature-controlled phase change material remains at approximately 90% to dissipate heat. When the temperature drops, the infrared emissivity of the inner layer temperature-controlled phase change material decreases to around 20%, activating the heat preservation mode. In hot weather, the temperature-controlled deformation material expands, causing the heterogeneous bilayer actuator to bend towards the environment. The perforated portion can directly transfer the battery's infrared radiation into the environment, while simultaneously enhancing air convection and strengthening heat dissipation. In cold weather, the temperature-controlled deformation material thin-film actuator returns to its original flat shape. The actuator can reflect infrared radiation back to the battery while suppressing infrared radiation caused by its low infrared emissivity, helping to suppress heat loss and achieve the purpose of heat preservation.

[0070] Furthermore, the temperature self-regulating unit has a non-enclosed structure.

[0071] In this embodiment, the energy required for the autonomous temperature control unit to achieve temperature self-regulation comes from the phase change material and deformation material itself, without involving interference or input of external energy. The energy required for the temperature sensing and diagnosis unit to collect, receive, process, and transmit signals between modules comes from the internal electrical energy of the battery. The energy required for the early warning unit to receive signals, process data, and make early warning actions comes from outside the battery.

[0072] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0073] Based on the same inventive concept, this application also provides a power battery thermal management device 1 for implementing the power battery thermal management method described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the power battery thermal management device 1 provided below can be found in the limitations of the power battery thermal management method above, and will not be repeated here.

[0074] In one embodiment, such as Figure 3 As shown, a power battery thermal management device 1 is provided, comprising: a data acquisition module 11 and a transmission module 12, wherein:

[0075] The acquisition module 11 is used to acquire internal battery temperature data when the battery temperature is regulated by a temperature self-regulation unit set externally to the battery.

[0076] The transmission module 12 is used to send the battery internal temperature data to the early warning unit via the target band;

[0077] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and material system, and to generate early warning information when the battery's operating status is abnormal.

[0078] In one embodiment, the acquisition module 11 is further configured to: acquire internal battery temperature data via an implanted temperature sensor deployed in the pre-wound layer of the internal electrode separator of the battery.

[0079] In one embodiment, the transmission module 12 is further configured to: modulate the internal temperature data of the battery and send the modulated internal temperature data of the battery to the early warning unit via a target band.

[0080] In one embodiment, the target band is a band with a frequency less than 100 Hz.

[0081] In one embodiment, the temperature self-regulating unit includes:

[0082] The inner layer of temperature-controlled phase change material is located on the outside of the battery;

[0083] The outer layer of temperature-controlled deformation material is located on the outside of the inner layer of temperature-controlled phase change material.

[0084] In one embodiment, the temperature self-regulating unit has a non-enclosed structure.

[0085] Each module in the aforementioned power battery thermal management device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0086] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores XX data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements a power battery thermal management method.

[0087] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0088] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0089] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0090] The internal temperature data of the battery is sent to the early warning unit via the target wavelength.

[0091] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and the battery's material system, and to generate early warning information when the battery's operating status is abnormal.

[0092] In one embodiment, when the processor executes the logic of the computer program to collect internal battery temperature data, it specifically implements the following steps: collecting internal battery temperature data through an implanted temperature sensor deployed in the pre-wound layer of the internal electrode separator of the battery.

[0093] In one embodiment, when the processor executes the logic of the computer program to send the battery internal temperature data to the early warning unit via the target band, the following steps are specifically implemented: modulating the battery internal temperature data and sending the modulated battery internal temperature data to the early warning unit via the target band.

[0094] In one embodiment, the target band is a band with a frequency less than 100 Hz.

[0095] In one embodiment, the temperature self-regulating unit includes: an inner layer of temperature-controlled phase change material disposed on the outside of the battery; and an outer layer of temperature-controlled deformation material disposed on the outside of the inner layer of temperature-controlled phase change material.

[0096] In one embodiment, the temperature self-regulating unit has a non-enclosed structure.

[0097] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0098] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0099] The internal temperature data of the battery is sent to the early warning unit via the target wavelength.

[0100] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and the battery's material system, and to generate early warning information when the battery's operating status is abnormal.

[0101] In one embodiment, when the logic of the computer program for collecting battery internal temperature data is executed by the processor, the following steps are specifically implemented: collecting battery internal temperature data through an implanted temperature sensor deployed in the pre-wound layer of the electrode separator inside the battery.

[0102] In one embodiment, when the logic of the computer program sending the battery internal temperature data to the early warning unit via the target band is executed by the processor, the following steps are specifically implemented: modulating the battery internal temperature data, and sending the modulated battery internal temperature data to the early warning unit via the target band.

[0103] In one embodiment, the target band is a band with a frequency less than 100 Hz.

[0104] In one embodiment, the temperature self-regulating unit includes:

[0105] An inner layer of temperature-controlled phase change material is disposed on the outer side of the battery;

[0106] An outer layer of temperature-controlled deformation material is disposed on the outside of the inner layer of temperature-controlled phase change material.

[0107] In one embodiment, the temperature self-regulating unit has a non-enclosed structure.

[0108] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0109] When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected.

[0110] The internal temperature data of the battery is sent to the early warning unit via the target wavelength.

[0111] The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and the battery's material system, and to generate early warning information when the battery's operating status is abnormal.

[0112] In one embodiment, when the logic of the computer program for collecting battery internal temperature data is executed by the processor, the following steps are specifically implemented: collecting battery internal temperature data through an implanted temperature sensor deployed in the pre-wound layer of the electrode separator inside the battery.

[0113] In one embodiment, when the logic of the computer program sending the battery internal temperature data to the early warning unit via the target band is executed by the processor, the following steps are specifically implemented: modulating the battery internal temperature data, and sending the modulated battery internal temperature data to the early warning unit via the target band.

[0114] In one embodiment, the target band is a band with a frequency less than 100 Hz.

[0115] In one embodiment, the temperature self-regulating unit includes:

[0116] An inner layer of temperature-controlled phase change material is disposed on the outer side of the battery;

[0117] An outer layer of temperature-controlled deformation material is disposed on the outside of the inner layer of temperature-controlled phase change material.

[0118] In one embodiment, the temperature self-regulating unit has a non-enclosed structure.

[0119] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0120] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A thermal management method for a power battery, characterized in that, The method includes: When the battery temperature is regulated by a temperature self-regulating unit located outside the battery, internal battery temperature data is collected. The internal temperature data of the battery is sent to the early warning unit via the target wavelength. The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and the battery's material system, and to generate early warning information when the battery's operating status is abnormal. The temperature self-regulating unit includes: An inner layer of temperature-controlled phase change material is disposed on the outer side of the battery; An outer layer of temperature-controlled deformation material is disposed on the outside of the inner layer of temperature-controlled phase change material; Under high temperature conditions, the infrared emissivity of the inner layer temperature-controlled phase change material remains high to dissipate heat; when the temperature drops, the infrared emissivity of the inner layer temperature-controlled phase change material drops to low infrared emissivity, thus activating the heat preservation mode. In hot weather, the outer temperature-controlled deformation material expands, causing the heterogeneous bilayer actuator to bend towards the environment and transmit the battery's infrared radiation into the environment; in cold weather, the outer temperature-controlled deformation material thin film actuator will return to its original flat shape and reflect the infrared radiation back to the battery.

2. The method according to claim 1, characterized in that, The collected battery internal temperature data includes: The internal temperature data of the battery is collected by an implanted temperature sensor that is placed in the pre-wound layer of the electrode separator inside the battery.

3. The method according to claim 1, characterized in that, The step of sending the battery's internal temperature data to the early warning unit via the target wavelength includes: The internal temperature data of the battery is modulated and transmitted to the early warning unit via the target band.

4. The method according to claim 1, characterized in that, The target band is a band with a frequency less than 100Hz.

5. The method according to any one of claims 1 to 4, characterized in that, The temperature self-regulating unit has a non-enclosed structure.

6. A power battery thermal management device, characterized in that, The apparatus for implementing the method according to any one of claims 1 to 5, comprising: The data acquisition module is used to acquire internal battery temperature data when the battery temperature is regulated by an externally mounted temperature self-regulating unit. The transmission module is used to send the internal temperature data of the battery to the early warning unit via the target band; The early warning unit is used to determine the battery's operating status based on the battery's internal temperature data and the battery's material system, and to generate early warning information when the battery's operating status is abnormal.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

Images