Ultra-fast charging temperature correction method, device and equipment of battery, medium and product

Abstract

The invention relates to an ultra-fast charging temperature correction method, device and equipment of a battery, a medium and a product, and the method comprises the steps: obtaining a battery cell highest temperature collection value and a battery cell lowest temperature collection value of the current battery; if it is judged that the current battery meets a preset temperature compensation condition based on the highest temperature collection value of the battery cell, the highest temperature collection value of the battery cell and the lowest temperature collection value of the battery cell are obtained, and the highest temperature compensation value of the battery cell and the lowest temperature compensation value of the battery cell are calculated based on the relation between the preset temperature rise rate and the current; and obtaining a battery cell highest temperature correction value according to the battery cell highest temperature acquisition value and the battery cell highest temperature compensation value, and obtaining a battery cell lowest temperature correction value according to the battery cell lowest temperature acquisition value and the battery cell lowest temperature compensation value. Therefore, the problem that in the prior art, normal and abnormal temperature rise in the battery cell cannot be accurately reflected when the vehicle battery is subjected to ultrafast charging is solved, the charging performance of the vehicle battery is improved, and the charging safety of the whole vehicle under the ultrafast charging condition is improved.

Description

Technical Field

[0001] The present invention relates to the field of battery charging technology, and in particular to a method, device, equipment, medium and product for correcting the ultra-fast charging temperature of a battery. Background Art

[0002] As the number of new energy vehicles increases, ultra-fast charging technology has always been a key issue of concern to new energy vehicle users. In order to increase the charging rate, shorten the charging time, and improve the charging safety of the entire vehicle under ultra-fast charging conditions, it is necessary to accurately predict the internal temperature of the battery in order to accurately control the charging strategy.

[0003] However, the problem of being unable to accurately reflect the normal and abnormal temperature rise inside the battery cell during ultra-fast charging of vehicle batteries and being unable to maximize charging performance and charging safety needs to be solved urgently. Summary of the invention

[0004] The present invention provides a method, device, equipment, medium and product for ultra-fast charging temperature correction of a battery, so as to solve the problem that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged, improve the charging performance of the vehicle battery, and enhance the charging safety of the whole vehicle under ultra-fast charging conditions.

[0005] The first aspect of the present invention provides a method for ultra-fast charging temperature correction of a battery, the method comprising: obtaining a maximum cell temperature acquisition value and a minimum cell temperature acquisition value of a current battery; based on the maximum cell temperature acquisition value, determining whether the current battery meets a preset temperature compensation condition, obtaining the maximum cell temperature acquisition value and the minimum cell temperature acquisition value, and calculating the maximum cell temperature compensation value and the minimum cell temperature compensation value based on a preset temperature rise rate and current relationship; obtaining a maximum cell temperature correction value according to the maximum cell temperature acquisition value and the maximum cell temperature compensation value, and obtaining a minimum cell temperature correction value according to the minimum cell temperature acquisition value and the minimum cell temperature compensation value.

[0006] Further, in some embodiments, after obtaining the maximum cell temperature collection value and the minimum cell temperature collection value of the current battery, it also includes: obtaining the current charging current of the current battery; if the current charging current is greater than a first preset current, determining whether the first duration that the current charging current is greater than the first preset current is greater than the first preset duration, and whether the maximum cell temperature collection value increases by the preset temperature; if the first duration is greater than the first preset duration, and the maximum cell temperature collection value increases by the preset temperature, determining that the current battery meets the preset temperature compensation condition.

[0007] Furthermore, in some embodiments, after obtaining the battery cell minimum temperature correction value according to the battery cell minimum temperature collection value and the battery cell minimum temperature compensation value, it also includes: judging whether the current charging current is less than a second preset current, and whether the second duration of the current charging current being less than the second preset current is greater than the second preset duration; if the current charging current is less than the second preset current, and the second duration is greater than the second preset duration, after judging that the current battery meets the preset exit temperature compensation condition, adjusting the battery cell maximum temperature correction value based on the first strategy until the battery cell maximum temperature correction value is equal to the battery cell maximum temperature collection value, and adjusting the battery cell minimum temperature correction value based on the second strategy until the battery cell minimum temperature correction value is equal to the battery cell minimum temperature collection value.

[0008] Furthermore, in some embodiments, the maximum temperature compensation value of the battery cell is:

[0009] Cell maximum temperature compensation value = ∑(VT ntcmax -(-0.0024x 2 +0.0279x-0.0084))·Δt;

[0010] Among them, VT ntcmax To calculate the maximum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current △t is the sampling period, the unit is s.

[0011] Furthermore, in some embodiments, the minimum temperature compensation value of the battery cell is:

[0012] The minimum temperature compensation value of the battery cell = Σ(VT ntcmin -(-0.0023x 2 +0.0274x-0.0115))·Δt;

[0013] Among them, VT ntcmin To calculate the minimum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, △t is the sampling period, and the unit is s.

[0014] Further, in some embodiments, the battery cell minimum temperature correction value is less than or equal to the battery cell maximum temperature correction value.

[0015] According to the battery ultra-fast charging temperature correction method provided by the embodiment of the present invention, the internal temperature rise rate of the battery is calculated through the external temperature sampling point and the charging current, and the internal temperature of the battery is calculated in real time. The problem in the prior art that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged is solved, the charging performance of the vehicle battery is improved, and the charging safety of the whole vehicle under ultra-fast charging conditions is improved.

[0016] The second aspect of the present invention provides an ultra-fast charging temperature correction device for a battery, wherein the device includes: an acquisition module, used to obtain a maximum cell temperature acquisition value and a minimum cell temperature acquisition value of the current battery; a calculation module, used to determine, based on the maximum cell temperature acquisition value, whether the current battery meets a preset temperature compensation condition, then obtain the maximum cell temperature acquisition value and the minimum cell temperature acquisition value, and calculate the maximum cell temperature compensation value and the minimum cell temperature compensation value based on a preset temperature rise rate and current relationship; a correction module, used to obtain a maximum cell temperature correction value based on the maximum cell temperature acquisition value and the maximum cell temperature compensation value, and obtain a minimum cell temperature correction value based on the minimum cell temperature acquisition value and the minimum cell temperature compensation value.

[0017] Further, in some embodiments, after obtaining the maximum cell temperature collection value and the minimum cell temperature collection value of the current battery, the computing device is also used to: obtain the current charging current of the current battery; if the current charging current is greater than a first preset current, determine whether the first duration that the current charging current is greater than the first preset current is greater than the first preset duration, and whether the maximum cell temperature collection value increases by a preset temperature; if the first duration is greater than the first preset duration, and the maximum cell temperature collection value increases by the preset temperature, determine that the current battery meets the preset temperature compensation condition.

[0018] Further, in some embodiments, after obtaining the battery cell minimum temperature correction value according to the battery cell minimum temperature collection value and the battery cell minimum temperature compensation value, the correction module is also used to: determine whether the current charging current is less than a second preset current, and whether the second duration of the current charging current being less than the second preset current is greater than the second preset duration; if the current charging current is less than the second preset current, and the second duration is greater than the second preset duration, after determining that the current battery meets the preset exit temperature compensation condition, adjust the battery cell maximum temperature correction value based on the first strategy until the battery cell maximum temperature correction value is equal to the battery cell maximum temperature collection value, and at the same time adjust the battery cell minimum temperature correction value based on the second strategy until the battery cell minimum temperature correction value is equal to the battery cell minimum temperature collection value.

[0019] Furthermore, in some embodiments, the maximum temperature compensation value of the battery cell is:

[0020] Cell maximum temperature compensation value = ∑(VT ntcmax -(-0.0024x 2 +0.0279x-0.0084))·Δt;

[0021] Among them, VT ntcmaxTo calculate the maximum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current △t is the sampling period, the unit is s.

[0022] Furthermore, in some embodiments, the minimum temperature compensation value of the battery cell is:

[0023] The minimum temperature compensation value of the battery cell = ∑(VT ntcmin -(-0.0023x 2 +0.0274x-0.0115))·Δt;

[0024] Among them, VT ntcmin To calculate the minimum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, △t is the sampling period, and the unit is s.

[0025] Further, in some embodiments, the battery cell minimum temperature correction value is less than or equal to the battery cell maximum temperature correction value.

[0026] The ultra-fast charging temperature correction device for a battery provided by an embodiment of the present invention calculates the internal temperature rise rate of the battery through external temperature sampling points and charging current, and calculates the internal temperature of the battery in real time. This solves the problem in the prior art that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged, improves the charging performance of the vehicle battery, and improves the charging safety of the vehicle under ultra-fast charging conditions.

[0027] A third aspect of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for correcting the temperature of ultra-fast charging of a battery as described in any one of the above items.

[0028] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, the program being executed by a processor to implement a method for correcting the temperature of an ultra-fast charge of a battery as described in any one of the above items.

[0029] A fifth aspect of the present invention provides a method including a computer program, which, when executed by a processor, implements the ultra-fast charging temperature correction method for a battery as described in any one of the above items.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 A flow chart of a method for correcting the temperature of a battery for ultra-fast charging according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of a JR MAX temperature rise rate and current relationship curve according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a curve showing the relationship between the JR MIN temperature rise rate and the current according to an embodiment of the present invention;

[0035] Figure 4 A schematic block diagram of a battery ultra-fast charging temperature correction device according to an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The following describes the ultra-fast charging temperature correction method, device, equipment, medium and product of the battery in the embodiment of the present invention with reference to the accompanying drawings. In view of the problem mentioned in the above background technology that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged, and the charging performance and charging safety cannot be maximized, the present invention provides a method for ultra-fast charging temperature correction of the battery, which calculates the internal temperature rise rate of the battery through external temperature sampling points and charging current, and calculates the internal temperature of the battery in real time. It solves the problem in the prior art that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged, improves the charging performance of the vehicle battery, and improves the charging safety of the whole vehicle under ultra-fast charging conditions.

[0039] Specifically, Figure 1 The present invention is a flow chart of a method for correcting the temperature of a battery for ultra-fast charging according to an embodiment of the present invention.

[0040] like Figure 1 As shown, the ultra-fast charging temperature correction method of the battery includes the following steps:

[0041] In step S101, the maximum temperature acquisition value and the minimum temperature acquisition value of the battery cell of the current battery are acquired.

[0042] Among them, the temperature of the battery cell can be collected through thermistors. At the same time, in order to truly reflect the temperature of the battery cell, the thermistor needs to be arranged at a location such as the surface of the battery cell, the busbar, or the module cover, which can accurately sense the temperature change of the battery cell.

[0043] In step S102, based on the maximum temperature collected value of the battery cell, it is determined that the current battery meets the preset temperature compensation conditions, then the maximum temperature collected value of the battery cell and the minimum temperature collected value of the battery cell are obtained, and based on the preset relationship between the temperature rise rate and the current, the maximum temperature compensation value of the battery cell and the minimum temperature compensation value of the battery cell are calculated.

[0044] It should be understood that there are many ways to determine whether the battery meets the preset temperature compensation conditions. For example, the embodiment of the present invention can make a determination based on the current size and the increase in the maximum temperature of the battery cell. The specific determination process will be described in detail later.

[0045] Furthermore, in some embodiments, the preset relationship between the temperature rise rate and the current can be established by obtaining the average temperature rise rates of 40°C fast charging, 25°C fast charging and 40°C high-speed post-fast charging, respectively, and establishing a curve of the temperature rise rate and the relationship with the current.

[0046] Among them, Table 1 is a table of average temperature rise rates of 40°C fast charging and 25°C fast charging provided according to a specific embodiment of the present invention, and Table 2 is a table of average temperature rise rates of 40°C high-speed post-fast charging provided according to a specific embodiment of the present invention.

[0047] Table 1

[0048]

[0049]

[0050] Table 2

[0051]

[0052] Furthermore, the embodiment of the present invention can generate a temperature rise rate and current relationship curve according to the average temperature rise rate table, where: Figure 2 and Figure 3 As shown, Figure 2 The figure is a schematic diagram of a curve showing the relationship between the JR MAX temperature rise rate and the current according to an embodiment of the present invention. Figure 3 The figure is a schematic diagram of a curve showing the relationship between the temperature rise rate and the current of a JR MIN according to an embodiment of the present invention, wherein x=I^2 / 100000.

[0053] Furthermore, in some embodiments, according to the temperature rise rate and current relationship curve, the maximum temperature compensation value of the battery cell and the minimum temperature compensation value of the battery cell can be calculated.

[0054] Furthermore, in some embodiments, the maximum temperature compensation value of the battery cell is: maximum temperature compensation value of the battery cell = ∑(VT ntcmax -(-0.0024x 2 +0.0279x-0.0084))·Δt. Among them, VT ntcmax To calculate the maximum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, △t is the sampling period. Thus, the maximum temperature of the battery cell NTCmax can be calculated in real time. The temperature rise rate VT of 1℃ ntcmax =1℃ / t1, t1 is the time required for a change of 1℃ (unit: s), t1>5s; VT ntcmax Initial value = 2*(-0.0024x2+0.0279x-0.0084).

[0055] Furthermore, in some embodiments, the minimum temperature compensation value of the battery cell is: minimum temperature compensation value of the battery cell = ∑(VT ntcmin -(-0.0023x 2 +0.0274x-0.0115))·Δt. Among them, VT ntcmin To calculate the minimum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, △t is the sampling period. Thus, the minimum temperature of the battery cell NTCmin and the temperature rise rate VT of 1℃ can be calculated in real time. ntcmin =1℃ / t1, t1 is the time required for a change of 1℃ (unit: s), t1>5s; VT ntcmin n initial value = 2*(-0.0023x2+0.0274x-0.0115).

[0056] In step S103, a cell maximum temperature correction value is obtained according to the cell maximum temperature acquisition value and the cell maximum temperature compensation value, and a cell minimum temperature correction value is obtained according to the cell minimum temperature acquisition value and the cell minimum temperature compensation value.

[0057] Specifically, the maximum temperature correction value of the battery cell in the embodiment of the present invention can be obtained according to the difference between the maximum temperature acquisition value of the battery cell and the maximum temperature compensation value of the battery cell, wherein the maximum temperature compensation value of the battery cell ranges from 0°C to 20°C. Similarly, the minimum temperature correction value of the battery cell in the embodiment of the present invention can be obtained according to the difference between the minimum temperature acquisition value of the battery cell and the low and high temperature compensation values ​​of the battery cell, wherein the minimum temperature compensation value of the battery cell ranges from 0°C to 20°C.

[0058] It should be noted that the embodiments of the present invention may verify the minimum temperature correction value of the battery cell during the compensation process. For example, in some embodiments, the minimum temperature correction value of the battery cell is less than or equal to the maximum temperature correction value of the battery cell.

[0059] The following is a detailed description of determining whether the battery meets the preset temperature compensation condition.

[0060] As an example, in some embodiments, after obtaining the maximum cell temperature collection value and the minimum cell temperature collection value of the current battery, it also includes: obtaining the current charging current of the current battery; if the current charging current is greater than the first preset current, determining whether the first duration that the current charging current is greater than the first preset current is greater than the first preset duration, and whether the maximum cell temperature collection value increases by a preset temperature; if the first duration is greater than the first preset duration, and the maximum cell temperature collection value increases by a preset temperature, determining that the current battery meets the preset temperature compensation conditions.

[0061] For example, in the embodiment of the present invention, when the current is greater than 273 A for 10 seconds and the maximum temperature collected value of the battery cell increases by greater than or equal to 1° C., it is determined that the current battery meets the preset temperature compensation condition.

[0062] Since the current changes during the charging process, if the battery cell is always temperature compensated, over-compensation may occur when the current is low. Therefore, when to determine that the current battery meets the preset exit temperature compensation condition is further explained below.

[0063] As an example, in some embodiments, after obtaining the battery cell minimum temperature correction value based on the battery cell minimum temperature collection value and the battery cell minimum temperature compensation value, it also includes: judging whether the current charging current is less than the second preset current, and whether the second duration of the current charging current being less than the second preset current is greater than the second preset duration; if the current charging current is less than the second preset current, and the second duration is greater than the second preset duration, judging that the current battery meets the preset exit temperature compensation condition, and adjusting the battery cell maximum temperature correction value based on the first strategy until the battery cell maximum temperature correction value is equal to the battery cell maximum temperature collection value, and at the same time adjusting the battery cell minimum temperature correction value based on the second strategy until the battery cell minimum temperature correction value is equal to the battery cell minimum temperature collection value.

[0064] Among them, the first preset current, the first preset duration, the second preset current and the second preset duration can be manually set or can be the results obtained based on experimental data, and are not specifically limited here.

[0065] For example, the battery cell maximum temperature exit temperature compensation condition of the embodiment of the present invention can be: when the current is less than 273A for 100s, the battery cell maximum temperature correction value catches up with the battery cell maximum temperature collection value at a rate of 1°C / 10s until |battery cell maximum temperature correction value-battery cell maximum temperature collection value|≤1°C, then the battery cell maximum temperature correction value = battery cell maximum temperature collection value.

[0066] Similarly, the battery cell minimum temperature exit temperature compensation condition of the embodiment of the present invention is: when the current is less than 273A for 100s, the battery cell minimum temperature correction value catches up with the battery cell minimum temperature collection value at a rate of 1°C / 10s until |battery cell minimum temperature correction value-battery cell maximum temperature collection value|≤1°C, then the battery cell minimum temperature correction value = battery cell minimum temperature collection value.

[0067] According to the ultra-fast charging temperature correction method for the battery provided by the embodiment of the present invention, the internal temperature rise rate of the battery is calculated through the external temperature sampling point and the charging current, and the internal temperature of the battery is calculated in real time. The problem that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged in the prior art is solved, and the collection, correction and compensation of the battery cell temperature are realized. The internal temperature of the battery can be accurately predicted, the charging strategy can be accurately controlled, the charging performance of the vehicle battery is improved, and the charging safety of the whole vehicle under ultra-fast charging conditions is improved.

[0068] Next, the ultra-fast charging temperature correction device for a battery according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0069] Figure 4 The present invention is a block diagram of a battery ultra-fast charging temperature correction device provided according to an embodiment of the present invention.

[0070] like Figure 4 As shown, the battery ultra-fast charging temperature correction device 10 includes: an acquisition module 100, a calculation module 200 and a correction module 300.

[0071] Among them, the acquisition module 100 is used to obtain the maximum temperature acquisition value and the minimum temperature acquisition value of the current battery cell; the calculation module 200 is used to determine whether the current battery meets the preset temperature compensation condition based on the maximum temperature acquisition value of the battery cell, then obtain the maximum temperature acquisition value and the minimum temperature acquisition value of the battery cell, and calculate the maximum temperature compensation value and the minimum temperature compensation value of the battery cell based on the preset temperature rise rate and current relationship; the correction module 300 is used to obtain the maximum temperature correction value of the battery cell according to the maximum temperature acquisition value and the maximum temperature compensation value of the battery cell, and to obtain the minimum temperature correction value of the battery cell according to the minimum temperature acquisition value and the minimum temperature compensation value of the battery cell.

[0072] Furthermore, in some embodiments, after obtaining the maximum cell temperature collection value and the minimum cell temperature collection value of the current battery, the calculation module 200 is also used to: obtain the current charging current of the current battery; if the current charging current is greater than the first preset current, determine whether the first continuous time that the current charging current is greater than the first preset current is greater than the first preset time, and whether the maximum cell temperature collection value increases by a preset temperature; if the first continuous time is greater than the first preset time, and the maximum cell temperature collection value increases by a preset temperature, determine that the current battery meets the preset temperature compensation conditions.

[0073] Further, in some embodiments, after obtaining the battery cell minimum temperature correction value based on the battery cell minimum temperature collection value and the battery cell minimum temperature compensation value, the correction module 300 is also used to: determine whether the current charging current is less than the second preset current, and whether the second duration of the current charging current being less than the second preset current is greater than the second preset duration; if the current charging current is less than the second preset current, and the second duration is greater than the second preset duration, after determining that the current battery meets the preset exit temperature compensation condition, adjust the battery cell maximum temperature correction value based on the first strategy until the battery cell maximum temperature correction value is equal to the battery cell maximum temperature collection value, and at the same time adjust the battery cell minimum temperature correction value based on the second strategy until the battery cell minimum temperature correction value is equal to the battery cell minimum temperature collection value.

[0074] Furthermore, in some embodiments, the maximum temperature compensation value of the battery cell is:

[0075] Cell maximum temperature compensation value = ∑(VT ntcmax -(-0.0024x 2 +0.0279x-0.0084))·Δt;

[0076] Among them, VT ntcmax To calculate the maximum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current △t is the sampling period, the unit is s.

[0077] Furthermore, in some embodiments, the minimum temperature compensation value of the battery cell is:

[0078] The minimum temperature compensation value of the battery cell = ∑(VT ntcmin -(-0.0023x 2 +0.0274x-0.0115))·Δt;

[0079] Among them, VT ntcmin To calculate the minimum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, △t is the sampling period, and the unit is s.

[0080] Furthermore, in some embodiments, the battery cell minimum temperature correction value is less than or equal to the battery cell maximum temperature correction value.

[0081] It should be noted that the aforementioned explanation of the embodiment of the battery ultra-fast charging temperature correction method is also applicable to the battery ultra-fast charging temperature correction device of this embodiment, and will not be repeated here.

[0082] The ultra-fast charging temperature correction device for a battery provided by an embodiment of the present invention calculates the internal temperature rise rate of the battery through external temperature sampling points and charging current, and calculates the internal temperature of the battery in real time. This solves the problem in the prior art that the normal and abnormal temperature rise inside the battery cell cannot be accurately reflected when the vehicle battery is ultra-fast charged, improves the charging performance of the vehicle battery, and improves the charging safety of the vehicle under ultra-fast charging conditions.

[0083] Figure 5 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present invention. The electronic device may include:

[0084] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0085] When the processor 502 executes the program, the ultra-fast charging temperature correction method for the battery provided in the above embodiment is implemented.

[0086] Furthermore, the electronic device also includes:

[0087] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0088] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0089] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0090] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0091] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0092] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0093] In addition, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the above-mentioned method for correcting the temperature of ultra-fast charging of a battery.

[0094] In addition, an embodiment of the present invention further provides a computer program product, including a computer program, which is executed to implement any of the above-mentioned methods for correcting the temperature of ultra-fast charging of a battery.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0098] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0099] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

Claims

1. A method for correcting the temperature of a battery for ultra-fast charging, characterized in that: The following steps are involved: Get the current battery's maximum and minimum cell temperature values. Based on the maximum temperature collected value of the battery cell, it is determined that the current battery meets the preset temperature compensation condition, then the maximum temperature collected value of the battery cell and the minimum temperature collected value of the battery cell are obtained, and based on the preset relationship between the temperature rise rate and the current, the maximum temperature compensation value of the battery cell and the minimum temperature compensation value of the battery cell are calculated; A cell maximum temperature correction value is obtained according to the cell maximum temperature collection value and the cell maximum temperature compensation value, and a cell minimum temperature correction value is obtained according to the cell minimum temperature collection value and the cell minimum temperature compensation value.

2. The method according to claim 1, characterized in that After obtaining the maximum temperature collection value and the minimum temperature collection value of the battery cell of the current battery, the method further includes: Obtaining a current charging current of the current battery; If the current charging current is greater than the first preset current, determining whether a first duration during which the current charging current is greater than the first preset current is greater than the first preset duration, and whether the collected value of the maximum temperature of the battery cell increases by a preset temperature; If the first duration is greater than the first preset duration, and the collected value of the maximum temperature of the battery cell increases by the preset temperature, it is determined that the current battery meets the preset temperature compensation condition.

3. The method according to claim 2, characterized in that After obtaining the battery cell minimum temperature correction value according to the battery cell minimum temperature acquisition value and the battery cell minimum temperature compensation value, the method further includes: Determine whether the current charging current is less than a second preset current, and whether a second duration during which the current charging current is less than the second preset current is greater than the second preset duration; If the current charging current is less than the second preset current, and the second duration is greater than the second preset duration, it is determined that the current battery meets the preset exit temperature compensation condition, and the battery cell maximum temperature correction value is adjusted based on the first strategy until the battery cell maximum temperature correction value is equal to the battery cell maximum temperature collection value, and at the same time, the battery cell minimum temperature correction value is adjusted based on the second strategy until the battery cell minimum temperature correction value is equal to the battery cell minimum temperature collection value.

4. The method according to claim 1, characterized in that The maximum temperature compensation value of the battery cell is: Cell maximum temperature compensation value = ∑(VT ntcmax -(-0.0024x 2 +0.0279x-0.0084))·Δt; Among them, VT ntcmax To calculate the maximum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, and △t is the sampling period.

5. The method according to claim 1, characterized in that: The minimum temperature compensation value of the battery cell is: The minimum temperature compensation value of the battery cell = Σ(VT ntcmin -(-0.0023x 2 +0.0274x-0.0115))·Δt; Among them, VT ntcmin To calculate the minimum temperature of the battery cell in real time, x = I^2 / 100000, I is the battery current, and △t is the sampling period.

6. The method according to any one of claims 1 to 5, characterized in that: The battery cell minimum temperature correction value is less than or equal to the battery cell maximum temperature correction value.

7. A battery ultra-fast charging temperature correction device, characterized in that: The device comprises: The acquisition module is used to obtain the maximum temperature collection value and the minimum temperature collection value of the battery cell of the current battery; A calculation module, for determining, based on the maximum temperature acquisition value of the battery cell, whether the current battery satisfies a preset temperature compensation condition, obtaining the maximum temperature acquisition value of the battery cell and the minimum temperature acquisition value of the battery cell, and calculating the maximum temperature compensation value of the battery cell and the minimum temperature compensation value of the battery cell based on a preset relationship between the temperature rise rate and the current; The correction module is used to obtain a cell maximum temperature correction value according to the cell maximum temperature collection value and the cell maximum temperature compensation value, and to obtain a cell minimum temperature correction value according to the cell minimum temperature collection value and the cell minimum temperature compensation value.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the ultra-fast charging temperature correction method for a battery as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the ultra-fast charging temperature correction method for a battery as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the ultra-fast charging temperature correction method for a battery as described in any one of claims 1 to 6 is implemented.

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