Battery fast charging power boundary control method, electronic equipment and computer program product

Abstract

The invention discloses a battery fast charging power boundary control method, electronic equipment and a computer program product, and the method comprises the steps: obtaining a first charging power and a second charging power, the first charging power being a power which enables the heat production capability and the heat dissipation capability to reach balance under the condition that a battery is continuously charged; the second charging power is the power capable of reaching the highest temperature after the battery is charged for preset time; determining a real-time power volume according to the first charging power and the real-time power in the battery charging process; the real-time power volume represents accumulated energy of temperature change of the battery when the battery is charged with real-time power; determining a limited power volume according to the first charging power, the second charging power and a preset time; the limited power volume represents accumulated energy when the battery is heated to the highest temperature when the battery is charged at the second charging power; according to the technical scheme provided by the invention, the charging efficiency is improved while the charging safety is ensured.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of battery technology, and in particular to a battery fast charging power boundary control method, electronic device, and computer program product. Background Art

[0002] With the development of lithium-ion battery fast charging technology, high-power DC charging has become the industry standard. At present, during fast charging, high-power charging is usually used. The battery pack can easily reach the battery's safety boundary temperature, or even exceed the battery pack's safety boundary temperature, increasing the risk of thermal runaway of the battery. If the charging power is reduced to meet the safety boundary temperature, the charging time will be increased.

[0003] The current fast charging technology still has shortcomings in determining and controlling the battery charging power boundary, and cannot achieve a balance between fast charging efficiency and safety performance, which affects the battery charging efficiency. Summary of the invention

[0004] The present invention provides a battery fast charging power boundary control method, electronic equipment and computer program product, which can improve charging efficiency while ensuring charging safety.

[0005] In a first aspect, the present invention provides a battery fast charging power boundary control method, comprising:

[0006] Obtaining a first charging power and a second charging power, wherein the first charging power is the power at which the heat generation capacity and the heat dissipation capacity of the battery can be balanced when the battery is continuously charged; and the second charging power is the power at which the battery can reach the highest temperature after a preset charging time.

[0007] Determine a real-time power capacity according to the first charging power and the real-time power during the charging process of the battery; the real-time power capacity represents the accumulated energy of the temperature change generated by the battery when the battery is charged at the real-time power;

[0008] determining a limited power capacity according to the first charging power, the second charging power and the preset time; the limited power capacity represents the accumulated energy required for the battery to be heated to the maximum temperature when the battery is charged at the second charging power;

[0009] When the real-time power capacity is less than the limiting power capacity, the boundary of the maximum battery charging power is set to the second charging power; when the real-time power capacity is equal to the limiting power capacity, the boundary of the maximum battery charging power is set to the first charging power.

[0010] Optionally, determining the real-time power capacity according to the first charging power and the real-time power during the battery charging process includes:

[0011] Acquire a first difference between the real-time power and the first charging power;

[0012] The real-time power capacity during the charging process is obtained based on the integration operation according to the first difference.

[0013] Optionally, obtaining the real-time power capacity during the charging process based on the difference based on an integral operation includes:

[0014] The real-time power capacity is obtained based on a first integral formula, where the first integral formula is:

[0015]

[0016] W T is the real-time power capacity, A0 is the capacity coefficient, P T is the real-time power, P cont is the first charging power, ta-tb is the charging time period when the real-time power is greater than the first charging power, tc-td is the charging time period when the real-time power is less than or equal to the first charging power, and i and j are both integers.

[0017] Optionally, determining the limited power capacity according to the first charging power, the second charging power and the preset time includes:

[0018] Obtaining a second difference between the second charging power and the first charging power;

[0019] The limited power capacity within the preset time is obtained based on an integral operation according to the second difference.

[0020] Optionally, obtaining the limited power capacity within the preset time based on an integral operation according to the second difference includes:

[0021] The limited power capacity is obtained based on a second integral formula, where the second integral formula is:

[0022]

[0023] W T-limit is the limiting power capacity, P s is the second charging power, and t1 is the preset time.

[0024] Optionally, when the real-time power capacity is less than the limited power capacity, the boundary of the maximum charging power of the battery is set to the second charging power, including:

[0025] When charging is turned on, the real-time power capacity is less than the limited power capacity, the boundary of the maximum battery charging power is set to the second charging power, and if the real-time power capacity is greater than the first preset threshold, the real-time power is gradually increased to the second charging power.

[0026] Optionally, when the real-time power capacity is equal to the limited power capacity, after the boundary of the maximum battery charging power is set to the first charging power, the method includes:

[0027] When the real-time power capacity is less than the limited power capacity again, the boundary of the maximum battery charging power is set to the second charging power. If the real-time power capacity is greater than the second preset threshold, the real-time power is less than or equal to the first charging power.

[0028] Optionally, the first preset threshold value ranges from 0% to 90% of the limited power capacity; the second preset threshold value ranges from 0% to 90% of the limited power capacity.

[0029] In a second aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0030] at least one processor; and,

[0031] a memory communicatively connected to the at least one processor; wherein,

[0032] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the battery fast charging power boundary control method described in any embodiment of the present invention.

[0033] In a third aspect, an embodiment of the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the battery fast charging power boundary control method described in any embodiment of the present invention is implemented.

[0034] The technical solution provided by the present invention obtains a first charging power and a second charging power, wherein the first charging power is the power at which the heat generation capacity and the heat dissipation capacity can be balanced when the battery is continuously charged; the second charging power is the power at which the battery can reach the highest temperature after a preset charging time; the first charging power and the second charging power are used as boundary conditions of the charging power. The real-time power capacity is determined using the first charging power and the real-time power during the battery charging process, and the limited power capacity is determined using the first charging power, the second charging power and the preset time; when the real-time power capacity is less than the limited power capacity, it indicates that the accumulated energy currently charged with the real-time power has not reached the accumulated energy heated to the highest temperature. At this time, the boundary of the maximum power of the battery charging can be set to the second charging power. At this time, increasing the real-time power can increase the charging speed, thereby speeding up the charging process, and during this period, the limit of the maximum temperature of the battery can be met, thereby ensuring charging safety and charging efficiency. When the real-time power capacity is equal to the limited power capacity, it means that the cumulative energy currently charged with the real-time power reaches the cumulative energy required to heat up to the maximum temperature. At this time, the boundary of the maximum charging power of the battery is set to the first charging power. At this time, the real-time power is limited so that the heat generation capacity of the battery during charging is less than or equal to the heat dissipation capacity to avoid the battery exceeding the maximum temperature and to ensure the safety of battery charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A flowchart of a battery fast charging power boundary control method provided by an embodiment of the present invention;

[0036] Figure 2 A flowchart of another battery fast charging power boundary control method provided by an embodiment of the present invention;

[0037] Figure 3 is a schematic diagram of real-time power control;

[0038] Figure 4 Schematic diagram of real-time power boundary Ptmax limit

[0039] Figure 5 A schematic structural diagram of an electronic device is provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Figure 1A flowchart of a battery fast charging power boundary control method provided by an embodiment of the present invention. This embodiment can be applied to fast charging power boundary control situations. The method can be executed by a fast charging power boundary control device, which can be implemented in hardware and / or software. The method specifically includes the following steps:

[0042] S110, obtaining a first charging power and a second charging power, wherein the first charging power is a power at which the heat generation capacity and the heat dissipation capacity of the battery can be balanced when the battery is continuously charged; and the second charging power is a power at which the battery can reach a maximum temperature after a preset charging time.

[0043] Specifically, the heat dissipation capacity of the battery under continuous charging is related to the thermal management capacity of the battery system. The thermal management of the battery system reduces the battery temperature and prevents the battery from thermal runaway through effective heat dissipation measures. The corresponding charging power when the heat generation of the battery itself during the continuous charging process and the heat dissipation of the battery during the thermal management process can be balanced is the first charging power. Among them, the first charging power can obtain the power data when the heat generation and heat dissipation are balanced at different temperatures and different SOCs by testing and or simulation. For example, the first charging power corresponding to 0-100% SOC and every 5% SOC interval at -20℃, -10℃, 0℃, 10℃, 20℃, 30℃, 40℃, 50℃ and 60℃ is calibrated respectively. By using the obtained data as a data table or database, the corresponding first charging power can be obtained at a specific temperature and SOC. For example, according to the current working condition of the battery, it can be known that it is 20℃ and 50% SOC, then the current first charging power is determined according to the two parameters of 20℃ and 50% SOC. In the actual charging process, the first charging power can be updated in real time according to the situation.

[0044] The power at which the battery can reach the highest temperature within the preset charging time is the second charging power. For example, the second charging power is a pulse charging power, and the pulse period is used as the preset time. The preset time can be set to n seconds, and n can be 1, 2, 3, 4, 5, etc. For example, the embodiment of the present invention adopts a 10-second pulse charging power, and the battery can reach the highest temperature after charging. Then the 10-second pulse charging power is the second charging power, which is also the maximum charging power allowed in the charging power. Among them, the second charging power can also be obtained by testing and / or simulation to obtain the power data of the highest temperature after charging at different temperatures and different SOCs. For example, the second charging power corresponding to 0-100% SOC and every 5% SOC interval is calibrated at -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C and 60°C respectively. By using the obtained data as a data table or database, the corresponding second charging power can be obtained at a specific temperature and SOC. For example, according to the current working condition of the battery, it is known to be 20°C and 50% SOC, then the current second charging power is determined based on the two parameters of 20°C and 50% SOC. During the actual charging process, the second charging power can be updated in real time according to the situation. It should be noted that when the battery includes multiple single cells, the first charging power and the second charging power are determined based on the single cell with the highest temperature in the battery and the corresponding SOC.

[0045] S120, determining a real-time power capacity according to the first charging power and the real-time power during the battery charging process; the real-time power capacity represents the accumulated energy of the temperature change generated by the battery when the battery is charged at the real-time power;

[0046] Specifically, taking the first charging power as a reference, the real-time power capacity is obtained according to the power relationship between the first charging power and the real-time power. For example, when the real-time power is greater than the first charging power, it means that when the battery is charged at the real-time power, the heat generated by the battery itself is greater than the heat dissipation of the battery. The heat of the battery will accumulate during the charging process, which will appear as a temperature rise. At this time, the energy used for temperature rise can be considered to be a positive value. When the real-time power is less than the first charging power, it means that when the battery is charged at the real-time power, the heat generated by the battery itself is less than the heat dissipation of the battery. The heat of the battery will decrease during the charging process, which will appear as a temperature drop. At this time, the energy used for temperature rise can be considered to be a negative value. Therefore, the cumulative energy used for temperature rise during the charging process can be regarded as the sum of the corresponding energies of temperature rise and temperature drop. The accumulated energy that causes temperature change through the battery is expressed as real-time power capacity.

[0047] S130, determining a limited power capacity according to the first charging power, the second charging power and the preset time; the limited power capacity represents the cumulative energy required for the battery to be heated to a maximum temperature when the battery is charged at the second charging power;

[0048] Specifically, when charging at the second charging power, the battery can reach the maximum temperature within a preset time. Since the second charging power is greater than the first charging power, the heat of the battery will also accumulate during the charging process, which will manifest as a temperature rise. According to the power relationship between the second charging power and the first charging power, the limited power capacity is obtained. For example, according to the difference between the second charging power and the first charging power, and the accumulated energy when the temperature rises during the corresponding charging process within a preset time, the accumulated energy when the battery is heated to the maximum temperature during the charging process represents the limited power capacity.

[0049] S140: When the real-time power capacity is less than the limited power capacity, the boundary of the maximum battery charging power is set to the second charging power; when the real-time power capacity is equal to the limited power capacity, the boundary of the maximum battery charging power is set to the first charging power.

[0050] Specifically, if the real-time power capacity is less than the limited power capacity, it means that the accumulated energy currently charged with the real-time power has not yet reached the accumulated energy heated to the maximum temperature. At this time, the boundary of the maximum battery charging power can be set to the second charging power, that is, the real-time power at this time can be a power value less than or equal to the second charging power. In some embodiments, in order to increase the charging speed, the real-time power can be the second charging power, thereby speeding up the charging process, and during this period, the battery maximum temperature limit can be met, ensuring charging safety and charging efficiency.

[0051] When the real-time power capacity is equal to the limited power capacity, it means that the cumulative energy currently charged with the real-time power reaches the cumulative energy required to heat up to the maximum temperature. At this time, the boundary of the maximum charging power of the battery is set to the first charging power. That is to say, by limiting the real-time power, the real-time power is less than or equal to the first charging power. Therefore, the heat generation capacity of the battery during charging is less than or equal to the heat dissipation capacity, thereby avoiding exceeding the maximum temperature and ensuring the charging safety of the battery.

[0052] The technical solution provided by the present invention obtains a first charging power and a second charging power, wherein the first charging power is the power at which the heat generation capacity and the heat dissipation capacity can be balanced when the battery is continuously charged; the second charging power is the power at which the battery can reach the highest temperature after a preset charging time; the first charging power and the second charging power are used as boundary conditions of the charging power. The real-time power capacity is determined using the first charging power and the real-time power during the battery charging process, and the limited power capacity is determined using the first charging power, the second charging power and the preset time; when the real-time power capacity is less than the limited power capacity, it indicates that the accumulated energy currently charged with the real-time power has not reached the accumulated energy heated to the highest temperature. At this time, the boundary of the maximum power of the battery charging can be set to the second charging power. At this time, increasing the real-time power can increase the charging speed, thereby speeding up the charging process, and during this period, the limit of the maximum temperature of the battery can be met, thereby ensuring charging safety and charging efficiency. When the real-time power capacity is equal to the limited power capacity, it means that the cumulative energy currently charged with the real-time power reaches the cumulative energy required to heat up to the maximum temperature. At this time, the boundary of the maximum charging power of the battery is set to the first charging power. At this time, the real-time power is limited so that the heat generation capacity of the battery during charging is less than or equal to the heat dissipation capacity to avoid the battery exceeding the maximum temperature and to ensure the safety of battery charging.

[0053] Figure 2 A flowchart of another battery fast charging power boundary control method provided by an embodiment of the present invention, see Figure 2 ,

[0054] S210, obtaining a first charging power and a second charging power, wherein the first charging power is a power at which the heat generation capacity and the heat dissipation capacity of the battery can be balanced when the battery is continuously charged; and the second charging power is a power at which the battery can reach a maximum temperature after a preset charging time.

[0055] S220, obtaining a first difference between the real-time power and the first charging power;

[0056] S230: Obtain the real-time power capacity during the charging process based on the first difference and an integral operation.

[0057] Specifically, during the charging process, the real-time power can be obtained through the battery management system (BMS). Since the first charging power is the power of the battery heat generation and heat dissipation balance, the first charging power can also be called risk-free power. The first difference between the real-time power and the first charging power can reflect the difference between the real-time power and the risk-free power. The cumulative energy of the heat generation capacity of the charging process is greater than the heat dissipation capacity by integrating the difference during the charging time, which is the real-time power capacity.

[0058] In some embodiments, obtaining the real-time power capacity during the charging process based on the difference based on the integral operation includes: obtaining the real-time power capacity based on a first integral formula, the first integral formula being:

[0059]

[0060] W T is the real-time power capacity, A0 is the capacity coefficient, P T is the real-time power, P cont is the first charging power, ta-tb is the charging time period when the real-time power is greater than the first charging power, tc-td is the charging time period when the real-time power is less than or equal to the first charging power, and i and j are both integers. Part of the total energy of the battery during the charging process will be converted into battery power, and part will be converted into heat consumption. The volume coefficient A0 is the proportional relationship between the part converted into heat and the total charging energy. In other words, the volume coefficient A0 reflects how much proportion of the charging energy is converted into battery heat. Among them, the volume coefficient A0 can be obtained based on the measured charging energy and the charging energy calibrated by simulation. When the real-time power is greater than the first charging power, it means that when the battery is charged with the real-time power, the heat generated by the battery itself is greater than the heat dissipation of the battery. The heat of the battery will accumulate during the charging process, which is manifested as temperature rise. At this time, the energy used for temperature rise can be considered to be a positive value. When the real-time power is less than the first charging power, it means that when the battery is charged with the real-time power, the heat generated by the battery itself is less than the heat dissipation of the battery. The heat of the battery will decrease during the charging process, which is manifested as temperature drop. At this time, the energy used for temperature rise can be considered to be a negative value. Therefore, the cumulative energy used by the battery to heat up during the charging process can be regarded as the sum of the energy corresponding to the temperature rise and temperature drop.

[0061] S240, obtaining a second difference between the second charging power and the first charging power;

[0062] S250: Obtain a limited power capacity within a preset time based on an integral operation according to the second difference.

[0063] Specifically, during the charging process, the second difference between the second charging power and the first charging power can reflect the difference between the maximum charging power and the risk-free power. By integrating the difference over the charging time, the cumulative energy of the battery heating to the highest temperature during the charging process can be obtained, which is the limiting power capacity.

[0064] In some embodiments, obtaining the limited power capacity within the preset time based on the second difference based on the integral operation includes: obtaining the limited power capacity based on a second integral formula, and the second integral formula is:

[0065]

[0066] W T-limitTo limit the power capacity, P s The second charging power, t1 is the preset time. The embodiment of the present invention adopts a 10-second pulse charging power, and the battery can reach the highest temperature after charging. The 10-second pulse charging power is the second charging power, and t1 is 10. The limited power capacity also reflects the maximum power capacity of the battery when the temperature rises to the highest temperature.

[0067] S260: When the real-time power capacity is less than the limited power capacity, the boundary of the maximum battery charging power is set to the second charging power; when the real-time power capacity is equal to the limited power capacity, the boundary of the maximum battery charging power is set to the first charging power.

[0068] Specifically, if the real-time power capacity is less than the limited power capacity, it means that the accumulated energy currently charged with the real-time power has not yet reached the accumulated energy heated to the maximum temperature. At this time, the boundary of the maximum battery charging power can be set to the second charging power, that is, the real-time power at this time can be a power value less than or equal to the second charging power. In some embodiments, in order to increase the charging speed, the real-time power can be the second charging power, thereby speeding up the charging process, and during this period, the battery maximum temperature limit can be met, ensuring charging safety and charging efficiency.

[0069] When the real-time power capacity is equal to the limited power capacity, it means that the cumulative energy currently charged with the real-time power reaches the cumulative energy required to heat up to the maximum temperature. At this time, the boundary of the maximum charging power of the battery is set to the first charging power. That is to say, by limiting the real-time power, the real-time power is less than or equal to the first charging power. Therefore, the heat generation capacity of the battery during charging is less than or equal to the heat dissipation capacity, thereby avoiding exceeding the maximum temperature and ensuring the charging safety of the battery.

[0070] In some embodiments, when the real-time power capacity is less than the limited power capacity, the boundary of the maximum charging power of the battery is set to the second charging power, including:

[0071] When charging is turned on, the real-time power capacity is less than the limited power capacity, and the boundary of the maximum battery charging power is set to the second charging power. If the real-time power capacity is greater than the first preset threshold, the real-time power is gradually increased to the second charging power.

[0072] Specifically, in some charging conditions, when charging is turned on, the real-time power capacity must be less than the limited power capacity. At this time, the boundary of the maximum battery charging power is set to the second charging power. At this time, the real-time power is less than or equal to the second charging power. In theory, the real-time power can be increased to the maximum second charging power, thereby increasing the charging speed. However, the instantaneous high-power impact affects the service life of the battery. Therefore, a period of pre-charging is performed first. The pre-charging power here can be greater than the first charging power. As the real-time power capacity increases, when the real-time power capacity is greater than the first preset threshold, the real-time power can be gradually increased until it is equal to the second charging power. Among them, the specific value of the first preset threshold here is not limited and is determined according to the actual charging demand. Exemplarily, the value range of the first preset threshold can be 0%-90% of the limited power capacity, such as 0% of the limited power capacity, 10% of the limited power capacity, 20% of the limited power capacity, 30% of the limited power capacity, 40% of the limited power capacity, 50% of the limited power capacity, 60% of the limited power capacity, 70% of the limited power capacity, 80% of the limited power capacity or 90% of the limited power capacity.

[0073] In some embodiments, when the real-time power capacity is equal to the limited power capacity, after the boundary of the maximum power of battery charging is set to the first charging power, the method includes:

[0074] When the real-time power capacity is less than the limited power capacity again, the boundary of the maximum battery charging power is set to the second charging power. If the real-time power capacity is greater than the second preset threshold, the real-time power is less than or equal to the first charging power.

[0075] Specifically, in some charging conditions, when charging starts, the real-time power volume is less than the limited power volume, and the boundary of the maximum battery charging power is set to the second charging power. At this time, the real-time power is less than or equal to the second charging power. In some embodiments, the real-time power can be pulled up to the maximum second charging power, thereby increasing the charging speed. Since the real-time power is greater than the first charging power, when charging for a certain period of time, the real-time power volume is equal to the limited power volume, and the boundary of the maximum battery charging power is adjusted to the first charging power. At this time, the real-time power is power data less than or equal to the first charging power. According to the first integral formula in the above embodiment, the difference between the real-time power and the first charging power is a negative value in some time periods. Therefore, during the entire charging time, as the charging time accumulates, the real-time power volume will decrease, and the real-time power volume will be less than the limited power volume, and the boundary of the maximum battery charging power will be adjusted to the second charging power again. At this time, the real-time power can theoretically be greater than the first charging power or pulled up to the maximum second charging power to increase the charging speed. However, during the charging process, if the charging power is directly increased, the real-time power capacity will be equal to the limited power capacity again in a very short time, causing the boundary conditions to change rapidly, which is obviously not conducive to charging stability. During this period, if the real-time power capacity is greater than the second preset threshold, it means that the variation space between the real-time power capacity and the limited power capacity is small. That is to say, during the charging process with real-time power, if the real-time power is charged with a power greater than the first charging power, the heat generated by the battery itself is greater than the heat dissipation of the battery. The heat of the battery will accumulate during the charging process, which may cause the real-time power capacity to be equal to the limited power capacity again in a very short time. Therefore, it is necessary to limit the real-time power to be less than or equal to the first charging power. During the charging process with real-time power, the heat generated by the battery itself is less than the heat dissipation of the battery. The heat of the battery will decrease during the charging process, which is used to increase the variation space between the real-time power capacity and the limited power capacity. Among them, the specific value of the second preset threshold here is not limited and is determined according to the actual charging demand. Exemplarily, the value range of the second preset threshold can be 0%-90% of the limited power capacity, such as 0% of the limited power capacity, 10% of the limited power capacity, 20% of the limited power capacity, 30% of the limited power capacity, 40% of the limited power capacity, 50% of the limited power capacity, 60% of the limited power capacity, 70% of the limited power capacity, 80% of the limited power capacity or 90% of the limited power capacity.

[0076] For ease of understanding, based on the above embodiments, the embodiments of the present invention provide a charging condition. In the specific charging condition, the first charging power and the second charging power are obtained based on the single cell with the highest temperature in the battery detected by the BMS and the corresponding SOC. The first charging power Pcont is 250W, the second charging power adopts 10s pulse power, and the second charging power Ps is 850W. The power capacity can be limited by: get. Figure 3 is a schematic diagram of real-time power control. Figure 4 This is a real-time power boundary Ptmax limit diagram, see Figure 3 and Figure 4 , at the beginning of charging, the real-time power P T The capacity is less than the limited power capacity, and the boundary of the maximum battery charging power is set to the second charging power Ps. After charging at 400W for 2s, the real-time power capacity is greater than the first preset threshold. In order to speed up the charging speed, the charging power is gradually increased to the second charging power Ps within 3-5s of charging. After charging at the second charging power Ps for 3s, the real-time power capacity is equal to the limited power capacity. To avoid exceeding the maximum temperature, the boundary of the maximum battery charging power is set to the first charging power Pcont, and the real-time power P T The battery is then reduced to the first charging power Pcont within 1 second and charged at the first charging power Pcont for 2 seconds. At this time, when the real-time power capacity is greater than the second preset threshold, the variation space between the real-time power capacity and the limited power capacity is small, so the implementation power P T Continue to decrease to less than the first charging power Pcont. At this time, the real-time power capacity is less than the limited power capacity, and the boundary of the maximum charging power of the battery is set to the second charging power Ps. For example, the real-time power capacity at the 11th second of the charging time can be expressed as:

[0077]

[0078] Among them, 0-9s is a charging time period when the real-time power is greater than the first charging power, and 10-11s is a charging time period when the real-time power is less than or equal to the first charging power.

[0079] At the 25th second of the charging time, the real-time power capacity is less than the second preset threshold value. The real-time power capacity at the 25th second of the charging time can be expressed as:

[0080]

[0081] Among them, 0-9s is the charging time period when the real-time power is greater than the first charging power, and 10-25s is the charging time period when the real-time power is less than or equal to the first charging power. In order to speed up the charging speed, the real-time power can be gradually increased to a power greater than the first charging power Pcont.

[0082] Figure 5 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. 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 processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0083] like Figure 5 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0084] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0085] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 11 performs the various methods and processes described above, such as a battery fast charging power boundary control method.

[0086] In some embodiments, the battery fast charging power boundary control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the battery fast charging power boundary control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the battery fast charging power boundary control method in any other appropriate manner (e.g., by means of firmware).

[0087] Various implementations of the systems and techniques described above 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 chips (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0088] Computer programs for implementing 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, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0089] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0090] To provide interaction with a user, the systems and techniques described herein may 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 a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0091] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0092] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery fast charging power boundary control method, characterized in that: include: Obtaining a first charging power and a second charging power, wherein the first charging power is the power at which the heat generation capacity and the heat dissipation capacity of the battery can be balanced when the battery is continuously charged; and the second charging power is the power at which the battery can reach the highest temperature after a preset charging time. Determine a real-time power capacity according to the first charging power and the real-time power during the charging process of the battery; the real-time power capacity represents the accumulated energy of the temperature change generated by the battery when the battery is charged at the real-time power; determining a limited power capacity according to the first charging power, the second charging power and the preset time; the limited power capacity represents the accumulated energy required for the battery to be heated to the maximum temperature when the battery is charged at the second charging power; When the real-time power capacity is less than the limiting power capacity, the boundary of the maximum battery charging power is set to the second charging power; when the real-time power capacity is equal to the limiting power capacity, the boundary of the maximum battery charging power is set to the first charging power.

2. The battery fast charging power boundary control method according to claim 1, characterized in that: Determining a real-time power capacity according to the first charging power and the real-time power during the battery charging process includes: Acquire a first difference between the real-time power and the first charging power; The real-time power capacity during the charging process is obtained based on the integration operation according to the first difference.

3. The battery fast charging power boundary control method according to claim 2, characterized in that: Obtaining the real-time power capacity during the charging process based on the difference based on an integral operation includes: The real-time power capacity is obtained based on a first integral formula, where the first integral formula is: W T is the real-time power capacity, A0 is the capacity coefficient, P T is the real-time power, P cont is the first charging power, ta-tb is the charging time period when the real-time power is greater than the first charging power, tc-td is the charging time period when the real-time power is less than or equal to the first charging power, and i and j are both integers.

4. The battery fast charging power boundary control method according to any one of claims 2-3, characterized in that: Determining a limited power capacity according to the first charging power, the second charging power, and the preset time includes: Obtaining a second difference between the second charging power and the first charging power; The limited power capacity within the preset time is obtained based on an integral operation according to the second difference.

5. The battery fast charging power boundary control method according to claim 4, characterized in that: Obtaining the limited power capacity within the preset time based on the second difference based on an integral operation includes: The limited power capacity is obtained based on a second integral formula, where the second integral formula is: W T-limit is the limiting power capacity, P s is the second charging power, and t1 is the preset time.

6. The battery fast charging power boundary control method according to claim 5, characterized in that: When the real-time power capacity is less than the limited power capacity, the boundary of the maximum charging power of the battery is set to the second charging power, including: When charging is turned on, the real-time power capacity is less than the limited power capacity, the boundary of the maximum battery charging power is set to the second charging power, and if the real-time power capacity is greater than the first preset threshold, the real-time power is gradually increased to the second charging power.

7. The battery fast charging power boundary control method according to claim 6, characterized in that: When the real-time power capacity is equal to the limited power capacity, after the boundary of the maximum battery charging power is set to the first charging power, the method includes: When the real-time power capacity is less than the limited power capacity again, the boundary of the maximum battery charging power is set to the second charging power. If the real-time power capacity is greater than the second preset threshold, the real-time power is less than or equal to the first charging power.

8. The battery fast charging power boundary control method according to claim 7, characterized in that: The value range of the first preset threshold is 0%-90% of the limited power capacity; the value range of the second preset threshold is 0%-90% of the limited power capacity.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the battery fast charging power boundary control method described in any one of claims 1-8.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the battery fast charging power boundary control method according to any one of claims 1 to 8 is implemented.

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