Heating film power design method, heating film, lithium-ion battery, equipment and medium

Abstract

This invention discloses a heating film power design method, a heating film, a lithium-ion battery, equipment, and a medium. The method includes: acquiring the current ambient temperature collected by a temperature sensor; setting the power required to raise the temperature of each cross-section along the length of the heating film from the current ambient temperature to a reference temperature; wherein the power of each cross-section is positively correlated with the distance of the cross-section from the center point of the heating film. By positively correlating the power of each cross-section along the length of the heating film with the distance of the cross-section from the center point of the heating film, and combining this with the characteristic that the heat dissipation conditions are worst at the middle of the battery cell and gradually improve towards both sides, the problem of uneven temperature in the battery cell caused by different heat dissipation conditions at different locations can be solved, thereby improving the temperature uniformity of the battery cell and thus increasing the battery's lifespan.

Description

Technical Field

[0001] This invention relates to heating technology, and more particularly to a heating film power design method, a heating film, a lithium-ion battery, equipment, and a medium. Background Technology

[0002] In low-temperature environments, the slow diffusion of lithium ions within lithium-ion batteries, the decrease in ionic conductivity in the electrolyte, the increase in internal contact resistance, and the slowing of various chemical reaction rates lead to a sharp decline in the battery's charge / discharge capacity and usable capacity. Especially in low-temperature environments, lithium plating can occur, and lithium dendrites growing to a certain extent can puncture the separator, causing safety incidents. To avoid these incidents, heating films are widely used in power battery systems. Heating films are used to heat the lithium-ion battery cells, ensuring that the cells operate at a normal temperature (e.g., 20℃-30℃).

[0003] Most existing heating films use electric heating. Because the heat dissipation conditions are different in different parts of the battery cell, the battery cell will have uneven temperature, that is, poor temperature uniformity, which will affect the battery's lifespan. Summary of the Invention

[0004] This invention provides a heating film power design method, a heating film, a lithium-ion battery, equipment, and a medium to solve the problem of uneven temperature in the battery cell caused by different heat dissipation conditions at different locations, thereby improving the temperature uniformity of the battery cell and thus increasing the battery's lifespan.

[0005] In a first aspect, the present invention provides a heating film power design method, comprising:

[0006] Obtain the current ambient temperature collected by the temperature sensor;

[0007] The power required to raise the temperature of each cross section along the length of the heating film from the current ambient temperature to a reference temperature is set, wherein the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0008] Optionally, the power required to raise the temperature of each cross-section along the length of the heating film from the current ambient temperature to the reference temperature can be set, including:

[0009] The simulation calculates the estimated heat required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature. The estimated heat required for each cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0010] Calculate the quotient of the estimated heat required for each section and the heating time to obtain the estimated power required for each section to rise from the current ambient temperature to the reference temperature;

[0011] The estimated power is corrected to obtain the power required to raise the current ambient temperature to the reference temperature for each cross section along the length of the heating film.

[0012] Optionally, the estimated power is corrected to obtain the power required to raise the temperature of each cross section along the length of the heating film from the current ambient temperature to the reference temperature, including:

[0013] Calculate the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films;

[0014] Calculate the quotient of the theoretical total power and the number of heating films to obtain the theoretical power of each heating film;

[0015] Based on the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature, the estimated total power of the heating film is calculated.

[0016] For each of the heating films, the quotient of the theoretical power and the estimated total power is calculated to obtain a correction factor;

[0017] The power required for each cross section to rise from the current ambient temperature to the reference temperature is obtained by multiplying the correction factor by the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature along the length of the heating film.

[0018] Optionally, the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films can be calculated using the following formula:

[0019]

[0020] Where P is the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films, a is the redundancy factor, and C p denoted as , where m is the specific heat capacity of the battery cell, m is the total mass of the battery module, ΔT is the temperature change of the battery module, and t is the heating time.

[0021] Optionally, based on the estimated power required for each cross-section to rise from the current ambient temperature to the reference temperature, the estimated total power of the heating film is calculated, including:

[0022] Based on the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature, an objective function is established that relates the estimated power to the distance between the cross section and the center point of the heating film.

[0023] The estimated total power of the heating film is obtained by calculating the integral of the objective function with respect to distance.

[0024] Optionally, after setting the power required to raise the temperature of each cross-section along the length of the heating film from the current ambient temperature to the reference temperature, the method further includes:

[0025] During the heating process, the actual temperature of each cross section along the length of the heating film is acquired by a temperature sensor.

[0026] The power of each cross section along the length of the heating film is adjusted based on the actual temperature and the expected temperature.

[0027] Secondly, the present invention also provides a heating film power design device, comprising:

[0028] The temperature acquisition module is used to acquire the current ambient temperature collected by the temperature sensor.

[0029] The power setting module is used to set the power required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature, wherein the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0030] Thirdly, the present invention also provides a heating film in which the power of each cross section along the length of the heating film is positively correlated with the distance of the cross section from the center point of the heating film.

[0031] Fourthly, the present invention also provides a lithium-ion battery comprising at least one heating film as provided in the third aspect of the present invention and a plurality of battery cells, wherein the heating film is disposed on at least one side of the battery cells.

[0032] Fifthly, the present invention also provides an electronic device, comprising:

[0033] One or more processors;

[0034] Memory, used to store one or more programs;

[0035] When the one or more programs are executed by the one or more processors, the one or more processors implement the heating film power design method as provided in the first aspect of the present invention.

[0036] In a sixth aspect, the present invention also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the heating film power design method provided in the first aspect of the present invention.

[0037] The heating film power design method provided by this invention includes: acquiring the current ambient temperature collected by a temperature sensor, setting the power required for each cross-section along the length of the heating film to rise from the current ambient temperature to a reference temperature, wherein the power of the cross-section is positively correlated with the distance of the cross-section from the center point of the heating film. By positively correlating the power of each cross-section along the length of the heating film with the distance of the cross-section from the center point of the heating film, and combining the characteristic that the heat dissipation conditions are worst at the middle position of the battery cell and gradually improve towards both sides, the problem of uneven temperature in the battery cell caused by different heat dissipation conditions at different positions of the battery cell can be solved, thereby improving the temperature uniformity of the battery cell and thus improving the battery life.

[0038] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A power design scheme diagram for a heating film provided by existing technology;

[0041] Figure 2 A flowchart of a heating film power design method provided in an embodiment of the present invention;

[0042] Figure 3 A power design scheme diagram for a heating film provided in an embodiment of the present invention;

[0043] Figure 4 A schematic diagram illustrating the objective function relating the estimated power to the distance between the cross section and the center point of the heating film, provided for an embodiment of the present invention;

[0044] Figure 5 A schematic diagram for calculating the integral of the objective function with respect to distance;

[0045] Figure 6 This is a schematic diagram of a heating film power design device provided in an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the structure of an electronic device provided as an embodiment of the present invention.

[0047] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] Figure 1 This diagram illustrates a power design scheme for a heating film in the prior art, dividing the heating film along its length into several uniformly powered sections, with higher power at both ends and lower power in the middle. For example... Figure 1 As shown, the heating film is divided into five sections, each with a uniformly distributed power at each position. The power is lowest at positions in the middle section (section a), highest at positions in the two outer sections (sections c), and the power at positions in section b, located between sections a and c, falls between the power of sections a and c. Due to varying heat dissipation conditions at different locations within the battery cell, the heat dissipation is worst at the middle position, gradually improving towards the outer edges. The current technology's uniform power design within each section causes heat to accumulate in the middle, resulting in inconsistent temperatures across different positions and impacting battery lifespan.

[0051] To address the aforementioned problems, this invention provides a heating film power design method. By positively correlated between the power of each cross-section along the length of the heating film and the distance of the cross-section from the center point of the heating film, the problem of uneven temperature in the battery cell caused by different heat dissipation conditions at different locations in the battery cell is solved, thereby improving the battery's service life. Figure 2 This is a flowchart illustrating a heating film power design method provided in an embodiment of the present invention. This embodiment is applicable to situations where uneven temperature distribution occurs in the battery cell due to varying heat dissipation conditions at different locations. The method can be executed by the heating film power design device provided in this embodiment of the present invention. This device can be implemented in software and / or hardware and is typically configured in electronic devices, such as... Figure 2 As shown, the heating film power design method may include the following steps:

[0052] S101. Obtain the current ambient temperature collected by the temperature sensor.

[0053] In this embodiment of the invention, a temperature sensor is externally mounted on the lithium-ion battery. This temperature sensor is connected to a Battery Management System (BMS), and it uploads the collected ambient temperature to the BMS, allowing the processing device to obtain the current ambient temperature from the BMS. The BMS is used for intelligent management and maintenance of each battery cell, preventing overcharging and over-discharging, extending battery life, and monitoring battery status. In other embodiments of the invention, the processing device may also directly obtain the current ambient temperature from the temperature sensor; this is not a limitation of the present invention.

[0054] S102. Set the power required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature, wherein the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0055] The ideal operating temperature for lithium-ion batteries is between 20°C and 45°C. At low temperatures, the charge / discharge capacity and usable capacity of lithium-ion batteries decrease dramatically. Therefore, in this embodiment of the invention, the reference temperature can be any temperature between 20°C and 45°C, for example, 25°C.

[0056] Figure 3 This invention provides a power design scheme for a heating film. In this embodiment, after obtaining the current ambient temperature, the power required to raise the temperature of each cross-section along the length of the heating film from the current ambient temperature to a reference temperature is set, such as... Figure 3As shown, the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film. That is, the closer the cross section is to the center point of the heating film, the lower the power, and the farther the cross section is from the center point of the heating film, the higher the power, and the trend is continuous. Combined with the characteristic that the heat dissipation conditions are worst in the middle of the cell and gradually improve towards both sides, the problem of uneven temperature in the cell caused by different heat dissipation conditions at different locations can be solved, the temperature uniformity of the cell can be improved, and thus the battery life can be improved.

[0057] For example, a positive temperature coefficient (PTC) material, such as a heating wire, can be provided in each cross section of the heating film. By adjusting the heating power of each heating wire, the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film. In other embodiments of the present invention, other implementation schemes may also be adopted, and the embodiments of the present invention are not limited herein.

[0058] The heating film power design method provided in this invention includes: acquiring the current ambient temperature collected by a temperature sensor, setting the power required for each cross-section along the length of the heating film to rise from the current ambient temperature to a reference temperature, wherein the power of the cross-section is positively correlated with the distance of the cross-section from the center point of the heating film. By positively correlating the power of each cross-section along the length of the heating film with the distance of the cross-section from the center point of the heating film, and combining the characteristic that the heat dissipation conditions are worst at the middle position of the battery cell and gradually improve towards both sides, the problem of uneven temperature in the battery cell caused by different heat dissipation conditions at different positions of the battery cell can be solved, thereby improving the temperature uniformity of the battery cell and thus improving the battery life.

[0059] In some embodiments of the present invention, step S102 may include the following sub-steps:

[0060] S1021. Simulate and calculate the estimated heat required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature. The estimated heat required for the cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0061] In this embodiment of the invention, simulation software is used to estimate the amount of heat required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature. The estimated heat required for each cross section output by the simulation software is positively correlated with the distance of the cross section from the center point of the heating film. That is, the closer the cross section is to the center point of the heating film, the smaller the estimated heat required, and the farther the cross section is from the center point of the heating film, the larger the estimated heat required, and the trend is continuous.

[0062] S1022. Calculate the quotient of the estimated heat required for each section and the heating time to obtain the estimated power required for each section to rise from the current ambient temperature to the reference temperature.

[0063] For example, the simulation software is set with the heating time required for each section to heat from the current ambient temperature to a reference temperature. By calculating the quotient of the estimated heat required for each section to heat to the reference temperature, the estimated power required for each section to rise from the current ambient temperature to the reference temperature is obtained.

[0064] S1023. Correct the estimated power to obtain the power required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature.

[0065] The estimated power required for each cross-section to rise from the current ambient temperature to the reference temperature is a simulated reference value, not an accurate value, and therefore needs to be corrected. In this embodiment of the invention, the theoretical power required for the heating film to heat the battery cell from the current ambient temperature to the reference temperature can be calculated, and the estimated power can be corrected based on this theoretical power. For example, the correction process is as follows:

[0066] 1. Calculate the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films.

[0067] For example, in an embodiment of the present invention, the theoretical total power required to heat the battery module from the current ambient temperature to a reference temperature using multiple heating films is calculated using the following formula:

[0068]

[0069] Where P is the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films, a is the redundancy factor, and C p denoted as , where m is the specific heat capacity of the battery cell, m is the total mass of the battery module, ΔT is the temperature change of the battery module, and t is the heating time.

[0070] 2. Calculate the quotient of the theoretical total power and the number of heating films to obtain the theoretical power of each heating film.

[0071] In this embodiment of the invention, the battery module is provided with multiple heating films. Assuming that each heating film has the same power, the theoretical power of each heating film can be obtained by calculating the quotient of the theoretical total power and the number of heating films. The calculation formula is as follows:

[0072] p = P / n

[0073] Where p is the theoretical power of each heating film, and n is the number of heating films.

[0074] 3. Based on the estimated power required for each section to rise from the current ambient temperature to the reference temperature, calculate the estimated total power of the heating film.

[0075] For example, the sum of the estimated power required for all cross sections to rise from the current ambient temperature to the reference temperature is calculated to obtain the estimated total power of the heating film.

[0076] In some embodiments of the present invention, an objective function is established based on the estimated power required for each cross-section to rise from the current ambient temperature to a reference temperature, relating the estimated power to the distance between the cross-section and the center point of the heating film. For example, Figure 4 A schematic diagram illustrating the objective function relating the estimated power to the distance between the cross-section and the center point of the heating film, as provided in this embodiment of the invention. Figure 4 As shown, the estimated power required by the cross section is positively correlated with the distance of the cross section from the center point of the heating film. That is, the closer the cross section is to the center point of the heating film, the smaller the estimated power required, and the farther the cross section is from the center point of the heating film, the larger the estimated power required, and the trend is continuous.

[0077] After obtaining the objective function of the estimated power and the distance of the cross section from the center point of the heating film, the integral of the objective function with respect to the distance is calculated to obtain the estimated total power of the heating film. Figure 5 A diagram illustrating the calculation of the integral of the objective function with respect to distance, as shown below. Figure 5 As shown, for Figure 5 By integrating the shaded area in the diagram, the estimated total power p′ of the heating film can be obtained.

[0078] 4. For each heating film, calculate the quotient of the theoretical power and the estimated total power to obtain the correction factor.

[0079] In this embodiment of the invention, for each heating film, the quotient of the theoretical power p and the estimated total power p′ is calculated to obtain the correction coefficient k. That is, k = p / p′.

[0080] 5. Calculate the product of the correction factor and the estimated power required for each section to rise from the current ambient temperature to the reference temperature, to obtain the power required for each section along the length of the heating film to rise from the current ambient temperature to the reference temperature.

[0081] For example, the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature is multiplied by a correction factor to obtain the power required for each cross section to rise from the current ambient temperature to the reference temperature along the length of the heating film.

[0082] The embodiments of the present invention are based on the theoretical power required for the heating film to heat the battery cell from the current ambient temperature to the reference temperature. The estimated power required for each cross section to rise from the current ambient temperature to the reference temperature obtained by simulation is corrected, thereby improving the accuracy of the output power of the heating film and thus improving the temperature uniformity of the heating film.

[0083] In some embodiments of the present invention, after setting the power required for each cross section to rise from the current ambient temperature to the reference temperature along the length of the heating film, the power required for each cross section to rise from the current ambient temperature to the reference temperature can be adjusted according to actual data.

[0084] For example, during the heating process, the actual temperature of each cross-section along the length of the heating film is acquired by a temperature sensor, and then the power of each cross-section along the length of the heating film is adjusted based on the actual temperature and the expected temperature. For instance, if the actual temperature of the cell at a certain cross-section is lower than the expected temperature, the power at that cross-section is increased; if the actual temperature of the cell at a certain cross-section is higher than the expected temperature, the power at that cross-section is decreased.

[0085] This invention also provides a heating film in which the power of each cross-section along the length of the heating film is positively correlated with the distance of the cross-section from the center point of the heating film. For example, Figure 3 As shown, the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film. That is, the closer the cross section is to the center point of the heating film, the lower the power, and the farther the cross section is from the center point of the heating film, the higher the power, and the trend is continuous. Combined with the characteristic that the heat dissipation conditions are worst in the middle of the cell and gradually improve towards both sides, the problem of uneven temperature in the cell caused by different heat dissipation conditions at different locations can be solved, the temperature uniformity of the cell can be improved, and thus the battery life can be improved.

[0086] This invention also provides a lithium-ion battery, including at least one heating film as provided in any of the foregoing embodiments and a plurality of battery cells, wherein the heating film is disposed on at least one side of the battery cell. For example, a heating film is attached to each side of each battery cell.

[0087] This invention also provides a heating film power design device. Figure 6 This is a schematic diagram of a heating film power design device provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the heating film power design device includes:

[0088] The ambient temperature acquisition module 201 is used to acquire the current ambient temperature collected by the temperature sensor;

[0089] The power setting module 202 is used to set the power required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature, wherein the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0090] In some embodiments of the present invention, the power setting module 202 includes:

[0091] The estimated heat calculation submodule is used to simulate and calculate the estimated heat required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature. The estimated heat required for each cross section is positively correlated with the distance of the cross section from the center point of the heating film.

[0092] The estimated power calculation submodule is used to calculate the quotient of the estimated heat required for each section and the heating time, so as to obtain the estimated power required for each section to rise from the current ambient temperature to the reference temperature.

[0093] The estimated power correction submodule is used to correct the estimated power to obtain the power required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature.

[0094] In some embodiments of the present invention, the power estimation correction submodule includes:

[0095] The theoretical total power calculation unit is used to calculate the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films;

[0096] The theoretical power calculation unit is used to calculate the quotient of the total theoretical power and the number of heating films to obtain the theoretical power of each heating film;

[0097] The estimated total power calculation unit is used to calculate the estimated total power of the heating film based on the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature.

[0098] The correction coefficient calculation unit is used to calculate the quotient of the theoretical power and the estimated total power for each of the heating films, and obtain the correction coefficient.

[0099] The correction unit is used to calculate the product of the correction coefficient and the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature, so as to obtain the power required for each cross section to rise from the current ambient temperature to the reference temperature along the length of the heating film.

[0100] In some embodiments of the present invention, the theoretical total power required to heat the battery module from the current ambient temperature to a reference temperature using multiple heating films is calculated using the following formula:

[0101]

[0102] Where P is the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films, a is the redundancy factor, and C p denoted as , where m is the specific heat capacity of the battery cell, m is the total mass of the battery module, ΔT is the temperature change of the battery module, and t is the heating time.

[0103] In some embodiments of the present invention, the estimated total power calculation unit includes:

[0104] The objective function construction sub-unit is used to establish an objective function relating the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature, and the distance between the cross section and the center point of the heating film.

[0105] The integrator subunit is used to calculate the integral of the objective function with respect to distance to obtain the estimated total power of the heating film.

[0106] In some embodiments of the present invention, the heating film power design device further includes:

[0107] The actual temperature acquisition module is used to acquire the actual temperature of each cross section along the length of the heating film, collected by the temperature sensor, during the heating process after setting the power required to raise the current ambient temperature to the reference temperature for each cross section along the length of the heating film.

[0108] A power adjustment module is used to adjust the power of each cross section along the length of the heating film based on the actual temperature and the expected temperature.

[0109] The heating film power design device described above can execute the heating film power design method provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects for executing the heating film power design method.

[0110] Figure 7 This is a schematic diagram of an electronic device provided for an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0111] like Figure 7As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0112] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0113] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the heating film power design method.

[0114] In some embodiments, the heating film power design method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or mounted on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the heating film power design method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the heating film power design method by any other suitable means (e.g., by means of firmware).

[0115] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0116] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0117] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0118] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0119] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with a graphical user interface or web browser through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication (e.g., communication networks) of any form or medium. Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0120] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0121] This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the heating film power design method provided in any embodiment of this application.

[0122] In implementing the computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0123] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0124] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for designing the power of a heating film, characterized in that, include: Obtain the current ambient temperature collected by the temperature sensor; The power required to raise the temperature of each cross section along the length of the heating film from the current ambient temperature to the reference temperature is set, wherein the power of the cross section is positively correlated with the distance of the cross section from the center point of the heating film; The power required to raise the temperature of each cross-section along the length of the heating film from the current ambient temperature to the reference temperature is set, including: The simulation calculates the estimated heat required for each cross section along the length of the heating film to rise from the current ambient temperature to the reference temperature. The estimated heat required for each cross section is positively correlated with the distance of the cross section from the center point of the heating film. Calculate the quotient of the estimated heat required for each section and the heating time to obtain the estimated power required for each section to rise from the current ambient temperature to the reference temperature; The estimated power is corrected to obtain the power required to raise the current ambient temperature to the reference temperature for each cross section along the length of the heating film.

2. The heating film power design method according to claim 1, characterized in that, The estimated power is corrected to obtain the power required to raise the temperature of each cross section along the length of the heating film from the current ambient temperature to the reference temperature, including: Calculate the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films; Calculate the quotient of the theoretical total power and the number of heating films to obtain the theoretical power of each heating film; Based on the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature, the estimated total power of the heating film is calculated. For each of the heating films, the quotient of the theoretical power and the estimated total power is calculated to obtain a correction factor; The power required for each cross section to rise from the current ambient temperature to the reference temperature is obtained by multiplying the correction factor by the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature along the length of the heating film.

3. The heating film power design method according to claim 2, characterized in that, The theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films is calculated using the following formula: Where P is the theoretical total power required to heat the battery module from the current ambient temperature to the reference temperature using multiple heating films, a is the redundancy factor, and C p denoted as , where is the specific heat capacity of the battery cell, m is the total mass of the battery module, ΔT is the temperature change of the battery module, and t is the heating time.

4. The heating film power design method according to claim 2, characterized in that, Based on the estimated power required for each cross-section to rise from the current ambient temperature to the reference temperature, the estimated total power of the heating film is calculated, including: Based on the estimated power required for each cross section to rise from the current ambient temperature to the reference temperature, an objective function is established that relates the estimated power to the distance between the cross section and the center point of the heating film. The estimated total power of the heating film is obtained by calculating the integral of the objective function with respect to distance.

5. The heating film power design method according to any one of claims 1-4, characterized in that, After setting the power required to raise the temperature of each cross section along the length of the heating film from the current ambient temperature to the reference temperature, the following is also included: During the heating process, the actual temperature of each cross section along the length of the heating film is acquired by a temperature sensor. The power of each cross section along the length of the heating film is adjusted based on the actual temperature and the expected temperature.

6. A heating film, characterized in that, The power design method of the heating film as described in any one of claims 1-5 is adopted, and the power of each cross section along the length of the heating film is positively correlated with the distance of the cross section from the center point of the heating film.

7. A lithium-ion battery, characterized in that, It includes at least one heating film as described in claim 6 and a plurality of battery cells, wherein the heating film is disposed on at least one side of the battery cells.

8. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the heating film power design method as described in any one of claims 1-5.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the heating film power design method as described in any one of claims 1-5.

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