Battery temperature acquisition method and device, electronic equipment and storage medium

Abstract

The invention relates to a battery temperature acquisition method and device, electronic equipment and a storage medium, and belongs to the technical field of batteries. The method comprises the following steps: acquiring an original temperature acquired by patch type temperature acquisition equipment on a battery protection board; obtaining a target temperature rise of the target area caused by the battery protection board as a heat source; and obtaining the target temperature of the battery based on the target temperature rise and the original temperature. Therefore, under the scene that the temperature of the battery is acquired through the patch type temperature acquisition equipment, the original temperature of the target area acquired by the patch type temperature acquisition equipment and the target temperature rise of the target area caused by the battery protection plate as a heat source can be acquired, and the target temperature of the battery is obtained by comprehensively considering the original temperature and the target temperature rise; compared with the prior art that the original temperature is mostly directly used as the target temperature of the battery, the accuracy of the battery temperature is improved, and the method is particularly suitable for a battery charging scene.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a method, device, electronic device and storage medium for obtaining battery temperature. Background Art

[0002] Battery temperature is an important indicator of the battery. Especially in the battery charging scenario, the battery temperature may fluctuate greatly. It is necessary to monitor the battery temperature in real time to ensure the normal operation of the battery. At present, patch-type temperature acquisition equipment has the advantages of low cost, simple process, and high reliability, and is widely used in battery temperature acquisition. However, in the related art, the accuracy of the battery temperature collected by the patch-type temperature acquisition equipment is low. Summary of the invention

[0003] The present disclosure provides a battery temperature acquisition method, device, electronic device, computer-readable storage medium, and computer program product to at least solve the problem of low accuracy of battery temperature acquired by a patch-type temperature acquisition device in the related art. The technical solution of the present disclosure is as follows:

[0004] According to a first aspect of an embodiment of the present disclosure, a method for obtaining battery temperature is provided, comprising: collecting the original temperature of a target area of ​​a battery protection board by a patch-type temperature collection device, wherein the patch-type temperature collection device is arranged on the battery protection board; obtaining a target temperature rise of the target area caused by the battery protection board being a heat source; and obtaining a target temperature of the battery based on the target temperature rise and the original temperature.

[0005] In one embodiment of the present disclosure, obtaining the target temperature rise of the target area caused by the battery protection plate being a heat source includes: obtaining a candidate functional relationship between candidate parameters of the battery and candidate temperature rise of the target area caused by the battery protection plate being a heat source; obtaining the target parameters of the battery; and determining the target temperature rise based on the target parameters and the candidate functional relationship.

[0006] In one embodiment of the present disclosure, the obtaining of a candidate functional relationship between candidate parameters of the battery and candidate temperature rise of the target area caused by the battery protection plate being a heat source comprises: obtaining a sample data set, wherein each sample data in the sample data set comprises sample parameters of the battery and sample temperature rise of the target area caused by the battery protection plate being a heat source at the same moment; and obtaining the candidate functional relationship based on the sample data set.

[0007] In one embodiment of the present disclosure, the sample data set includes a first subset, wherein each sample data in the first subset is determined when the sample change value of the average current value of the battery is less than or equal to a set threshold; obtaining the candidate functional relationship based on the sample data set includes: obtaining a first functional relationship based on the first subset.

[0008] In one embodiment of the present disclosure, the first functional relationship is obtained based on the first subset, including: obtaining a third functional relationship based on the first subset; obtaining a predicted temperature rise of the target area caused by the battery protection plate as a heat source based on the sample parameters of the battery and the third functional relationship, and determining a mutation moment of the predicted temperature rise; obtaining a fourth functional relationship based on the sample data in the first subset at the mutation moment; obtaining the sum of the third functional relationship and the fourth functional relationship as the first functional relationship.

[0009] In one embodiment of the present disclosure, the third functional relationship is obtained based on the sample data in the first subset at the mutation moment, including: obtaining the difference between the sample temperature rise at the mutation moment and the predicted temperature rise at the mutation moment as the sample second temperature rise at the mutation moment; obtaining the third functional relationship based on the sample parameters of the battery at the mutation moment and the sample second temperature rise at the mutation moment.

[0010] In one embodiment of the present disclosure, the third functional relationship is the functional relationship between the candidate current average value of the battery and the candidate first temperature rise, and the fourth functional relationship is the functional relationship between the candidate change value of the battery average value of the battery and the candidate second temperature rise, wherein the candidate temperature rise includes the candidate first temperature rise and the candidate second temperature rise.

[0011] In one embodiment of the present disclosure, the sample data set includes a second subset, wherein each sample data in the second subset is determined when the sample change value of the average current value of the battery is greater than a set threshold; obtaining the candidate functional relationship based on the sample data set includes: obtaining a second functional relationship based on the second subset.

[0012] In one embodiment of the present disclosure, the second functional relationship is a functional relationship between the candidate current average value of the battery and the candidate temperature rise.

[0013] In one embodiment of the present disclosure, determining the target temperature rise based on the target parameters and the candidate function relationship includes: obtaining a target change value of the average current value of the battery; selecting a target function relationship from a plurality of the candidate function relationships based on the target change value; and determining the target temperature rise based on the target parameters and the target function relationship.

[0014] In one embodiment of the present disclosure, the plurality of candidate functional relationships include a first functional relationship and a fourth functional relationship, wherein the first functional relationship is determined when a sample variation value of the average current value of the battery is less than or equal to a set threshold, and the second functional relationship is determined when the sample variation value is greater than the set threshold;

[0015] The target function relationship is selected from the multiple candidate function relationships based on the target change value, including: if the target change value is less than or equal to the set threshold, the first function relationship is used as the target function relationship; if the target change value is greater than the set threshold, the second function relationship is used as the target function relationship.

[0016] In one embodiment of the present disclosure, obtaining the target temperature of the battery based on the target temperature rise and the original temperature includes: obtaining a difference between the original temperature and the target temperature rise as the target temperature of the battery.

[0017] According to a second aspect of an embodiment of the present disclosure, a battery temperature acquisition device is provided, comprising: a first acquisition module, configured to acquire the original temperature of a target area of ​​a battery protection board through a patch-type temperature acquisition device, wherein the patch-type temperature acquisition device is arranged on the battery protection board; a second acquisition module, configured to acquire a target temperature rise of the target area caused by the battery protection board being a heat source; and a third acquisition module, configured to obtain a target temperature of the battery based on the target temperature rise and the original temperature.

[0018] In one embodiment of the present disclosure, the second acquisition module is further configured to execute: obtaining a candidate functional relationship between candidate parameters of the battery and a candidate temperature rise of the target area caused by the battery protection plate being a heat source; obtaining target parameters of the battery; and determining the target temperature rise based on the target parameters and the candidate functional relationship.

[0019] In one embodiment of the present disclosure, the second acquisition module is further configured to execute: acquiring a sample data set, wherein each sample data in the sample data set includes sample parameters of the battery at the same moment and a sample temperature rise of the target area caused by the battery protection plate being a heat source; and obtaining the candidate function relationship based on the sample data set.

[0020] In one embodiment of the present disclosure, the sample data set includes a first subset, wherein each sample data in the first subset is determined when the sample change value of the average current value of the battery is less than or equal to a set threshold; the second acquisition module is further configured to execute: based on the first subset, obtain a first functional relationship.

[0021] In one embodiment of the present disclosure, the second acquisition module is further configured to execute: based on the first subset, obtain a third functional relationship; based on the sample parameters of the battery and the third functional relationship, obtain the predicted temperature rise of the target area caused by the battery protection plate as a heat source, and determine the mutation moment of the predicted temperature rise; based on the sample data in the first subset at the mutation moment, obtain a fourth functional relationship; obtain the sum of the third functional relationship and the fourth functional relationship as the first functional relationship.

[0022] In one embodiment of the present disclosure, the second acquisition module is further configured to execute: obtaining the difference between the sample temperature rise at the mutation moment and the predicted temperature rise at the mutation moment as the sample second temperature rise at the mutation moment; and obtaining the third functional relationship based on the sample parameters of the battery at the mutation moment and the sample second temperature rise at the mutation moment.

[0023] In one embodiment of the present disclosure, the third functional relationship is the functional relationship between the candidate current average value of the battery and the candidate first temperature rise, and the fourth functional relationship is the functional relationship between the candidate change value of the battery average value of the battery and the candidate second temperature rise, wherein the candidate temperature rise includes the candidate first temperature rise and the candidate second temperature rise.

[0024] In one embodiment of the present disclosure, the sample data set includes a second subset, wherein each sample data in the second subset is determined when the sample change value of the average current value of the battery is greater than a set threshold; the second acquisition module is further configured to execute: based on the second subset, obtain a second functional relationship.

[0025] In one embodiment of the present disclosure, the second functional relationship is a functional relationship between the candidate current average value of the battery and the candidate temperature rise.

[0026] In one embodiment of the present disclosure, the second acquisition module is further configured to execute: obtaining a target change value of the average current value of the battery; selecting a target function relationship from a plurality of candidate function relationships based on the target change value; and determining the target temperature rise based on the target parameters and the target function relationship.

[0027] In one embodiment of the present disclosure, the plurality of candidate functional relationships include a first functional relationship and a fourth functional relationship, wherein the first functional relationship is determined when a sample variation value of the average current value of the battery is less than or equal to a set threshold, and the second functional relationship is determined when the sample variation value is greater than the set threshold;

[0028] The second acquisition module is further configured to execute: if the target change value is less than or equal to the set threshold, the first functional relationship is used as the target functional relationship; if the target change value is greater than the set threshold, the second functional relationship is used as the target functional relationship.

[0029] In one embodiment of the present disclosure, the third acquisition module is further configured to execute: acquiring a difference between the original temperature and the target temperature rise as a target temperature of the battery.

[0030] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, comprising a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to implement the steps of the method described in the first aspect of the embodiment of the present disclosure.

[0031] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method described in the first aspect of the embodiment of the present disclosure are implemented.

[0032] According to a fifth aspect of an embodiment of the present disclosure, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor of an electronic device, the computer program implements the steps of the method described in the first aspect of the embodiment of the present disclosure.

[0033] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects: the original temperature of the target area of ​​the battery protection board is collected by a patch-type temperature acquisition device, wherein the patch-type temperature acquisition device is arranged on the battery protection board, and the target temperature rise of the target area caused by the battery protection board as a heat source is obtained, and the target temperature of the battery is obtained based on the target temperature rise and the original temperature. Therefore, in the scenario where the battery temperature is collected by the patch-type temperature acquisition device, the original temperature of the target area collected by the patch-type temperature acquisition device and the target temperature rise of the target area caused by the battery protection board as a heat source can be obtained, and the target temperature of the battery is obtained by comprehensively considering the original temperature and the target temperature rise. Compared with the related art that directly uses the original temperature as the target temperature of the battery, the accuracy of the battery temperature is improved, which is particularly suitable for battery charging scenarios.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure.

[0036] Figure 1 The figure is a flow chart showing a method for acquiring battery temperature according to an exemplary embodiment.

[0037] Figure 2 is a block diagram of a battery according to an exemplary embodiment.

[0038] Figure 3 is a flow chart showing a method for acquiring battery temperature according to another exemplary embodiment.

[0039] Figure 4 The present invention is a flowchart of obtaining a candidate functional relationship in a method for obtaining battery temperature according to another exemplary embodiment.

[0040] Figure 5 The present invention is a flowchart of obtaining a first functional relationship in a method for obtaining battery temperature according to another exemplary embodiment.

[0041] Figure 6 is a schematic diagram showing a target temperature according to an exemplary embodiment.

[0042] Figure 7 is a schematic diagram showing a target temperature according to another exemplary embodiment.

[0043] Figure 8 is a schematic diagram showing a target temperature according to another exemplary embodiment.

[0044] Fig. 9 The figure is a block diagram of a device for acquiring battery temperature according to an exemplary embodiment.

[0045] Fig.10 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0046] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0048] The acquisition, storage, use, and processing of data in the technical solution disclosed in this disclosure are in compliance with the relevant provisions of national laws and regulations.

[0049] Figure 1 is a flow chart showing a method for obtaining battery temperature according to an exemplary embodiment. Figure 1 As shown, the method for obtaining the battery temperature of the embodiment of the present disclosure includes the following steps.

[0050] S101, collecting the original temperature of the target area of ​​the battery protection board through a patch-type temperature collection device, wherein the patch-type temperature collection device is arranged on the battery protection board.

[0051] It should be noted that the execution subject of the battery temperature acquisition method of the embodiment of the present disclosure is an electronic device, and the electronic device includes a mobile phone, a notebook, a desktop computer, a vehicle terminal, a smart home appliance, a wearable device, etc. Among them, the wearable device may include a wrist-worn device (such as a smart watch, a smart bracelet), a head-worn device, a foot-worn device, etc. The battery temperature acquisition method of the embodiment of the present disclosure can be executed by the battery temperature acquisition device of the embodiment of the present disclosure, and the battery temperature acquisition device of the embodiment of the present disclosure can be configured in any electronic device to execute the battery temperature acquisition method of the embodiment of the present disclosure.

[0052] It should be noted that there are no excessive restrictions on the battery protection board, the battery, and the chip-type temperature acquisition device. For example, the battery protection board includes a protection circuit, the battery may include a lithium battery, and the chip-type temperature acquisition device may include a chip-type NTC (Negative Temperature Coefficient) thermistor.

[0053] It should be noted that the target area is located in the contact area between the patch-type temperature acquisition device and the battery protection board.

[0054] For example, Figure 2 As shown, the battery protection board is located at the head of the battery, the patch-type temperature acquisition device is arranged on the battery protection board, and the battery is connected to the mainboard of the electronic device (not shown in the figure) through a connector.

[0055] It should be noted that the original temperature refers to the temperature actually collected by the patch-type temperature acquisition device at the current moment, and the original temperature Tntc=Tenv+Tp, wherein Tenv is the ambient temperature at the current moment, and Tp is the temperature rise of the target area caused by the heat source at the current moment, Tp=Tcell+Tpcm, that is, Tntc=Tenv+Tcell+Tpcm, Tcell is the temperature rise of the target area caused by the battery (such as the battery cell) as the heat source at the current moment, and Tpcm is the temperature rise of the target area caused by the battery protection board as the heat source at the current moment, that is, Tpcm is the target temperature rise.

[0056] In one embodiment, obtaining the original temperature includes obtaining the original temperature according to a set period. It should be noted that there is no excessive limitation on the set period, for example, it can be 2 seconds.

[0057] S102, obtaining a target temperature rise of a target area caused by the battery protection plate being a heat source.

[0058] It should be noted that the target temperature rise refers to the temperature rise of the target area at the current moment caused by the battery protection board being the heat source.

[0059] In one embodiment, obtaining the target temperature rise includes obtaining the Joule heat generated by the battery protection board, and determining the target temperature rise based on the Joule heat generated by the battery protection board and the specific heat capacity of the battery protection board.

[0060] In some examples, obtaining the target temperature rise Tpcm can be achieved by the following formula:

[0061] Q=Pt=I 2 *R*t

[0062] Tpcm=Q / Cm

[0063] Among them, Q is the Joule heat generated by the battery protection board, P is the heating power of the battery protection board, t is the time, I is the current passing through the battery protection board, R is the resistance of the battery protection board, and Cm is the specific heat capacity of the battery protection board.

[0064] S103, obtaining a target temperature of the battery based on the target temperature rise and the original temperature.

[0065] It should be noted that the target temperature of the battery refers to the temperature of the battery at the current moment.

[0066] In one embodiment, the target temperature of the battery is obtained based on the target temperature rise and the original temperature, including obtaining the difference between the original temperature and the target temperature rise as the target temperature of the battery, that is, the target temperature of the battery Tntc_com=Tntc-Tpcm=Tenv+Tcell.

[0067] In one embodiment, based on the target temperature rise and the original temperature, the target temperature of the battery is obtained, including obtaining the product between the target temperature rise and the set value, obtaining the difference between the original temperature and the product, as the target temperature of the battery, that is, the target temperature of the battery Tntc_com=Tntc-j*Tpcm, where j is the set value. It should be noted that there are no excessive restrictions on the set value, for example, it can be 0.8, 1, 1.2, etc.

[0068] In one embodiment, the target temperature of the battery is obtained based on the target temperature rise and the original temperature, including obtaining the target temperature of the battery based on the target temperature rise and the original temperature if the target temperature rise is within a set interval. Thus, the target temperature of the battery is obtained based on the target temperature rise and the original temperature only when the target temperature rise is within the set interval. It should be noted that the set interval is not overly limited.

[0069] In one embodiment, the target temperature of the battery is obtained based on the target temperature rise and the original temperature, including if the target temperature rise is less than the lower limit of the set interval, updating the target temperature rise to the lower limit of the set interval, if the target temperature rise is greater than the upper limit of the set interval, updating the target temperature rise to the upper limit of the set interval, and obtaining the target temperature of the battery based on the updated target temperature rise and the original temperature. Thus, when the target temperature rise is too large or too small, the target temperature rise can be updated, and the target temperature of the battery can be obtained using the updated target temperature rise and the original temperature.

[0070] The method for acquiring the battery temperature provided by the embodiment of the present disclosure uses a patch-type temperature acquisition device to acquire the original temperature of the target area of ​​the battery protection board, wherein the patch-type temperature acquisition device is set on the battery protection board, and acquires the target temperature rise of the target area caused by the battery protection board as a heat source, and obtains the target temperature of the battery based on the target temperature rise and the original temperature. Therefore, in the scenario where the battery temperature is acquired by the patch-type temperature acquisition device, the original temperature of the target area acquired by the patch-type temperature acquisition device and the target temperature rise of the target area caused by the battery protection board as a heat source can be acquired, and the target temperature of the battery is obtained by comprehensively considering the original temperature and the target temperature rise. Compared with the related art that directly uses the original temperature as the target temperature of the battery, the accuracy of the battery temperature is improved, which is particularly suitable for battery charging scenarios.

[0071] Figure 3 is a flow chart showing a method for obtaining battery temperature according to another exemplary embodiment. Figure 3 As shown, the method for obtaining the battery temperature of the embodiment of the present disclosure includes the following steps.

[0072] S301, collecting the original temperature of the target area of ​​the battery protection board through a patch-type temperature collection device, wherein the patch-type temperature collection device is arranged on the battery protection board.

[0073] For the relevant contents of step S301, please refer to the above embodiment, which will not be repeated here.

[0074] S302, obtaining a candidate functional relationship between candidate parameters of the battery and a candidate temperature rise of a target area caused by a battery protection board being a heat source.

[0075] It should be noted that there are not too many restrictions on the candidate parameters of the battery. For example, it may include candidate charging parameters, candidate discharging parameters, etc. of the battery, and may also include candidate current of the battery, candidate current average value, candidate change value of current average value, etc.

[0076] The candidate current average value refers to the average value of N consecutive candidate currents of the battery, where N is a positive integer greater than 1, and there is no excessive restriction on N, for example, it can be 35.

[0077] Among them, the candidate change value of the current average value refers to the difference between two consecutive candidate current average values. For example, the candidate change value of the current average value refers to the result of subtracting the candidate current average value at the (M+1)th moment from the candidate current average value at the Mth moment, and the (M+1)th moment is the next moment of the Mth moment.

[0078] It should be noted that the candidate functional relationship refers to the functional relationship between the candidate parameters of the battery as the independent variable and the candidate temperature rise as the dependent variable. There are no excessive restrictions on the candidate functional relationship, for example, it may include a linear functional relationship, an inverse proportional functional relationship, a quadratic functional relationship, an exponential functional relationship, etc. There is at least one candidate functional relationship.

[0079] In one implementation, the candidate functional relationship is preset. For example, the candidate functional relationship can be calibrated during the design, manufacture, and use of the battery or battery protection board.

[0080] In one implementation, obtaining the candidate functional relationship includes determining the candidate functional relationship based on a mapping relationship between an identifier of a battery and / or an identifier of a battery protection board and the candidate functional relationship.

[0081] S303, obtaining target parameters of the battery.

[0082] It should be noted that the target parameters of the battery refer to the parameters of the battery at the current moment. The target parameters of the battery can refer to the relevant contents of the candidate parameters of the battery in the above embodiment, which will not be repeated here.

[0083] In one implementation, obtaining the target parameter of the battery includes obtaining the current of the battery at a current moment as the target current of the battery.

[0084] In one implementation, obtaining the target parameter of the battery includes obtaining an average value of N consecutive battery currents closest to the current moment as the target current average value of the battery.

[0085] In one embodiment, obtaining the target parameter of the battery includes obtaining the difference between the average current value of the battery at the current moment and the average current value of the battery at the previous moment as the target change value of the average current value of the battery.

[0086] In one implementation, obtaining the target parameter of the battery includes obtaining the difference between two consecutive current average values ​​closest to the current moment as the target change value of the current average value of the battery.

[0087] S304: Determine a target temperature rise based on the target parameters and the candidate function relationship.

[0088] In the embodiments of the present disclosure, the target temperature rise is determined based on the target parameter and the candidate function relationship, including the following possible implementations:

[0089] Method 1: If the number of candidate functional relationships is one, determine the target temperature rise based on the target parameters and the candidate functional relationships.

[0090] For example, the target parameter is substituted into the candidate functional relationship as an independent variable to obtain the dependent variable of the candidate functional relationship as the target temperature rise.

[0091] Method 2: if the number of candidate functional relationships is Q, determine the i-th first temperature rise based on the target parameter and the i-th candidate functional relationship, and determine the target temperature rise based on the Q first temperature rises.

[0092] It should be noted that Q is a positive integer greater than 1, and i is a positive integer not greater than Q.

[0093] For example, the target parameter is substituted as an independent variable into the ith candidate functional relationship, and the dependent variable of the ith candidate functional relationship is obtained as the ith first temperature rise.

[0094] In one embodiment, determining the target temperature rise based on the Q first temperature rises includes obtaining statistical values ​​of the Q first temperature rises as the target temperature rise. It should be noted that the statistical values ​​may include an average value, a maximum value, a minimum value, a median value, etc.

[0095] In one implementation, determining the target temperature rise based on the Q first temperature rises includes performing weighted summation on the Q first temperature rises to obtain the target temperature rise.

[0096] In one implementation, determining the target temperature rise based on the Q first temperature rises includes screening out the target temperature rise from the Q first temperature rises.

[0097] Method 3: obtaining a target change value of the average current value of the battery, selecting a target function relationship from multiple candidate function relationships based on the target change value, and determining a target temperature rise based on the target parameters and the target function relationship.

[0098] Thus, the target change value of the average current value of the battery can be taken into consideration, a target function relationship can be selected from a plurality of candidate function relationships, and a target temperature rise can be determined based on the target parameters and the target function relationship.

[0099] For example, the target parameter is substituted into the target function relationship as an independent variable to obtain the dependent variable of the target function relationship as the target temperature rise.

[0100] In one implementation, based on the target change value, a target function relationship is selected from multiple candidate function relationships, including determining a target interval in which the target change value is located from multiple candidate intervals, and using the candidate function relationship mapped to the target interval as the target function relationship.

[0101] In one embodiment, the plurality of candidate functional relationships include a first functional relationship and a second functional relationship, wherein the first functional relationship is determined when the sample change value of the average current value of the battery is less than or equal to a set threshold, and the second functional relationship is determined when the sample change value is greater than the set threshold. It is understandable that the first functional relationship is applicable to a continuous current compensation scenario, wherein the continuous current compensation scenario refers to a scenario where the battery current changes slowly, and the second functional relationship is applicable to a large current sudden compensation scenario, wherein the large current sudden scenario refers to a scenario where the battery current suddenly increases in a short period of time, for example, it may include a scenario where the battery starts to charge with a large current.

[0102] Based on the target change value, a target function relationship is selected from multiple candidate function relationships, including taking the first function relationship as the target function relationship if the target change value is less than or equal to the set threshold, and taking the second function relationship as the target function relationship if the target change value is greater than the set threshold. Thus, the target function relationship can be selected from the first function relationship and the second function relationship based on the size relationship between the target change value and the set threshold, that is,

[0103] It should be noted that there is no excessive limitation on the threshold value ΔIpop, for example, it can be 0.6 A (ampere). The relevant contents of the first functional relationship and the second functional relationship can be found in the following embodiments, which will not be described in detail here.

[0104] S305 , obtaining a target temperature of the battery based on the target temperature rise and the original temperature.

[0105] For the relevant contents of step S305, please refer to the above embodiment, which will not be repeated here.

[0106] The battery temperature acquisition method provided by the embodiment of the present disclosure acquires a candidate function relationship between a candidate parameter of the battery and a candidate temperature rise of a target area caused by a battery protection plate as a heat source, acquires a target parameter of the battery, and determines a target temperature rise based on the target parameter and the candidate function relationship. Thus, the target temperature rise can be determined by comprehensively considering the candidate function relationship and the target parameter of the battery.

[0107] Based on any of the above embodiments, Figure 4 As shown, obtaining the candidate functional relationship between the candidate parameters of the battery and the candidate temperature rise of the target area caused by the battery protection board as a heat source in step S302 includes the following steps.

[0108] S401, obtaining a sample data set, wherein each sample data in the sample data set includes sample parameters of a battery at the same moment and a sample temperature rise of a target area caused by a battery protection plate being a heat source.

[0109] It should be noted that the sample data set includes a plurality of sample data. For the sample parameters of the battery, reference may be made to the relevant contents of the candidate parameters of the battery in the above embodiment, which will not be described in detail here.

[0110] In one embodiment, obtaining a sample data set includes collecting sample parameters and sample temperature rise of a battery at multiple moments according to a set period, correlating the sample parameters and sample temperature rise of the battery collected at the same moment to obtain sample data, and adding multiple sample data to the sample data set to generate a sample data set.

[0111] In one implementation, the sample data set includes a first subset, wherein each sample data in the first subset is determined when a sample variation value of an average current value of the battery is less than or equal to a set threshold.

[0112] Obtaining the first subset includes identifying a first sample time period in which a sample change value of the average current value of the battery is less than or equal to a set threshold, and generating the first subset based on sample parameters and sample temperature rise of the battery at multiple moments in the first sample time period.

[0113] In one embodiment, the sample data set includes a second subset, wherein each sample data in the second subset is determined when a sample variation value of an average current value of the battery is greater than a set threshold.

[0114] Acquiring the second subset includes identifying a second sample time period corresponding to a sample change value of the battery current average value greater than a set threshold, and generating the second subset based on sample parameters and sample temperature rise of the battery at multiple moments in the second sample time period.

[0115] S402, obtaining a candidate functional relationship based on the sample data set.

[0116] In one embodiment, based on the sample data set, obtaining the candidate functional relationship includes matching multiple sample data in the sample data set with the set functional relationship, obtaining the total matching degree between the sample data set and the set functional relationship, and determining the candidate functional relationship from multiple set functional relationships based on the total matching degree. For example, sorting the multiple set functional relationships in descending order according to the total matching degree, and taking the first L set functional relationships as the candidate functional relationships. For example, if the total matching degree of the set functional relationship is greater than the set value, the set functional relationship is taken as the candidate functional relationship. Wherein, L is a positive integer.

[0117] In one embodiment, the sample data set includes a first subset, wherein each sample data in the first subset is determined when the sample change value of the average current value of the battery is less than or equal to a set threshold. Based on the sample data set, a candidate functional relationship is obtained, including obtaining a first functional relationship based on the first subset. Thus, the first functional relationship can be obtained based on the first subset, which is suitable for the scenario of continuous current compensation.

[0118] In some examples, a first functional relationship is obtained based on the first subset, including determining a sample point in a two-dimensional coordinate system corresponding to the sample data based on sample parameters and sample temperature rise of the battery at the same time in the sample data, fitting sample points corresponding to multiple sample data in the sample data set to obtain a candidate curve, and using the functional relationship corresponding to the candidate straight line as a candidate functional relationship.

[0119] In some examples, the first functional relationship is a functional relationship between a candidate average current value of the battery, a candidate change value of the average current value of the battery, and a candidate temperature rise.

[0120] In one embodiment, the sample data set includes a second subset, wherein each sample data in the second subset is determined when the sample change value of the average current value of the battery is greater than a set threshold. Based on the sample data set, a candidate functional relationship is obtained, including obtaining a second functional relationship based on the second subset. It should be noted that, based on the second subset, the second functional relationship is obtained, and reference can be made to the relevant content of obtaining the first functional relationship based on the first subset in the above embodiment, which will not be repeated here.

[0121] In some examples, the second functional relationship is a functional relationship between a candidate current average value and a candidate temperature rise of the battery.

[0122] For example, the second functional relationship is as follows:

[0123] ΔT=g*Iave 2+h*Iave+i

[0124] Among them, ΔT is the candidate temperature rise, Iave is the candidate current average value of the battery, and g, h, and i are all function parameters.

[0125] Therefore, a sample data set is obtained in the method, wherein each sample data in the sample data set includes sample parameters of the battery at the same moment and a sample temperature rise of the target area caused by the battery protection plate as a heat source. Based on the sample data set, a candidate function relationship is obtained to achieve the acquisition of the candidate function relationship.

[0126] Based on any of the above embodiments, Figure 5 As shown, based on the first subset, a first functional relationship is obtained, including the following steps.

[0127] S501: Based on the first subset, obtain a third functional relationship.

[0128] It should be noted that, for obtaining the third functional relationship based on the first subset, reference may be made to the relevant content of obtaining the first functional relationship based on the first subset in the above embodiment, which will not be repeated here.

[0129] In some examples, the third functional relationship is a functional relationship between a candidate current average value and a candidate first temperature rise of the battery, wherein the candidate temperature rise includes the candidate first temperature rise.

[0130] For example, the third functional relationship is as follows:

[0131] ΔT1=a*Iave 2 +b*Iave+c

[0132] Wherein, ΔT1 is the candidate first temperature rise, Iave is the candidate current average value of the battery, and a, b, and c are all function parameters.

[0133] S502, based on the sample parameters of the battery and the third functional relationship, obtain the predicted temperature rise of the target area caused by the battery protection plate as a heat source, and determine the predicted sudden change moment of the temperature rise.

[0134] It should be noted that the predicted temperature rise is different from the sample temperature rise. The sample temperature rise is obtained by pre-calibration, while the predicted temperature rise is calculated based on the sample parameters of the battery and the third functional relationship.

[0135] For example, the sample parameters of the battery can be substituted into the third functional relationship as independent variables to obtain the dependent variable of the third functional relationship as the predicted temperature rise.

[0136] It should be noted that the mutation moment of the predicted temperature rise refers to the moment when the predicted temperature rise undergoes a mutation. For example, if the absolute value of the difference between two consecutive predicted temperature rises is greater than a set value, the predicted temperature rise undergoes a mutation, and the later moment of the two consecutive predicted temperature rises is taken as the mutation moment. For example, if the absolute value of the difference between the predicted temperature rise at the (M+1)th moment and the predicted temperature rise at the Mth moment is greater than a set value, the (M+1)th moment is taken as the mutation moment, and the (M+1)th moment is the next moment of the Mth moment.

[0137] It should be noted that there is at least one predicted temperature rise mutation moment.

[0138] It can be understood that the temperature change is caused by heat conduction and the temperature rise will not change suddenly.

[0139] S503: Obtain a fourth functional relationship based on the sample data in the first subset at the mutation moment.

[0140] It should be noted that the fourth functional relationship is obtained based on the sample data in the first subset at the mutation moment. The relevant content of obtaining the first functional relationship based on the first subset in the above embodiment can be referred to, and will not be repeated here.

[0141] In some examples, the fourth functional relationship is a functional relationship between a candidate change value of a battery average value of the battery and a candidate second temperature rise, wherein the candidate temperature rise includes the candidate second temperature rise.

[0142] For example, the fourth functional relationship is as follows:

[0143] ΔT2=d*ΔIave 2 +e*ΔIave+f

[0144] Wherein, ΔT2 is a candidate second temperature rise, ΔIave is a candidate change value of the average current of the battery, and d, e, and f are all function parameters.

[0145] In one embodiment, a fourth functional relationship is obtained based on the sample data in the first subset at the mutation moment, including obtaining the difference between the sample temperature rise at the mutation moment and the predicted temperature rise at the mutation moment as the sample second temperature rise at the mutation moment, and obtaining the fourth functional relationship based on the sample parameters of the battery at the mutation moment and the sample second temperature rise at the mutation moment.

[0146] In some examples, a fourth functional relationship is obtained based on the sample parameters of the battery at the mutation moment and the sample second temperature rise at the mutation moment, including associating the sample parameters of the battery at the same mutation moment and the sample second temperature rise to obtain sample mutation data, adding multiple sample mutation data to the sample mutation data set, and determining a sample mutation point in a two-dimensional coordinate system corresponding to the sample mutation data based on the sample parameters of the battery at the same mutation moment in the sample mutation data and the sample second temperature rise, fitting the sample mutation points corresponding to the multiple sample mutation data in the sample mutation data set to obtain a candidate curve, and using the functional relationship corresponding to the candidate straight line as the fourth functional relationship.

[0147] S504: Obtain a sum of the third functional relationship and the fourth functional relationship as the first functional relationship.

[0148] For example, the first functional relationship is as follows:

[0149] ΔT=ΔT1+ΔT2=a*Iave 2 +b*Iave+c+d*ΔIave 2 +e*ΔIave+f

[0150] Among them, ΔT is the candidate temperature rise, ΔT1 is the candidate first temperature rise, ΔT2 is the candidate second temperature rise, Iave is the candidate current average value of the battery, ΔIave is the candidate change value of the current average value of the battery, and a, b, c, d, e, and f are all function parameters.

[0151] Therefore, in this method, based on the first subset, a third functional relationship is obtained, based on the sample parameters of the battery and the third functional relationship, the predicted temperature rise of the target area caused by the battery protection plate as the heat source is obtained, and the mutation moment of the predicted temperature rise is determined, based on the sample data in the first subset at the mutation moment, the fourth functional relationship is obtained, and the sum of the third functional relationship and the fourth functional relationship is obtained as the first functional relationship to achieve the acquisition of the first functional relationship.

[0152] Based on any of the above embodiments, the first functional relationship and the second functional relationship are as follows:

[0153] ΔT=ΔT1+ΔT2=a*Iave 2 +b*Iave+c+d*ΔIave 2 +e*ΔIave+f

[0154] ΔT=g*Iave 2 +h*Iave+i

[0155] Taking the battery charging scenario as an example, the actual temperature of the battery, the original temperature, the target temperature determined using the first functional relationship, and the absolute value of the battery current are as follows: Figure 6 ,7 The actual temperature of the battery, the original temperature, the target temperature determined by the second functional relationship, and the absolute value of the battery current are shown in Figure 8 shown.

[0156] like Figure 6 As shown, the error between the target temperature determined by the first functional relationship and the actual temperature of the battery is small in the time period from 0 to 4500 seconds, that is, the first functional relationship is suitable for the continuous current compensation scenario.

[0157] like Figure 7 As shown, the error between the target temperature determined by the first functional relationship and the actual temperature of the battery is large in the time period from 0 to 300 seconds, and the charging current of the battery suddenly increases in the time period from 0 to 50 seconds, that is, the first functional relationship is not suitable for large current sudden compensation scenarios.

[0158] like Figure 8 As shown, the error between the target temperature determined by the second functional relationship and the actual temperature of the battery is small in the time period of 0 to 300 seconds, that is, the second functional relationship is suitable for the large current sudden compensation scenario.

[0159] Fig. 9 FIG. 1 is a block diagram of a device for obtaining battery temperature according to an exemplary embodiment. Fig. 9 The battery temperature acquisition device 100 of the embodiment of the present disclosure includes: a first acquisition module 110, a second acquisition module 120 and a third acquisition module 130.

[0160] The first acquisition module 110 is configured to acquire the original temperature of the target area of ​​the battery protection board through a patch-type temperature acquisition device, wherein the patch-type temperature acquisition device is arranged on the battery protection board;

[0161] The second acquisition module 120 is configured to execute acquisition of a target temperature rise of the target area caused by the battery protection board being a heat source;

[0162] The third acquisition module 130 is configured to obtain a target temperature of the battery based on the target temperature rise and the original temperature.

[0163] In one embodiment of the present disclosure, the second acquisition module 120 is further configured to execute: obtaining a candidate functional relationship between candidate parameters of the battery and a candidate temperature rise of the target area caused by the battery protection plate being a heat source; obtaining target parameters of the battery; and determining the target temperature rise based on the target parameters and the candidate functional relationship.

[0164] In one embodiment of the present disclosure, the second acquisition module 120 is further configured to execute: acquiring a sample data set, wherein each sample data in the sample data set includes sample parameters of the battery at the same moment and a sample temperature rise of the target area caused by the battery protection plate being a heat source; and obtaining the candidate function relationship based on the sample data set.

[0165] In one embodiment of the present disclosure, the sample data set includes a first subset, wherein each sample data in the first subset is determined when the sample change value of the average current value of the battery is less than or equal to a set threshold; the second acquisition module 120 is also configured to execute: based on the first subset, obtain a first functional relationship.

[0166] In one embodiment of the present disclosure, the second acquisition module 120 is further configured to perform: based on the first subset, obtain a third functional relationship; based on the sample parameters of the battery and the third functional relationship, obtain the predicted temperature rise of the target area caused by the battery protection plate as a heat source, and determine the mutation moment of the predicted temperature rise; based on the sample data in the first subset at the mutation moment, obtain a fourth functional relationship; obtain the sum of the third functional relationship and the fourth functional relationship as the first functional relationship.

[0167] In one embodiment of the present disclosure, the second acquisition module 120 is further configured to execute: obtaining the difference between the sample temperature rise at the mutation moment and the predicted temperature rise at the mutation moment as the sample second temperature rise at the mutation moment; and obtaining the third functional relationship based on the sample parameters of the battery at the mutation moment and the sample second temperature rise at the mutation moment.

[0168] In one embodiment of the present disclosure, the third functional relationship is the functional relationship between the candidate current average value of the battery and the candidate first temperature rise, and the fourth functional relationship is the functional relationship between the candidate change value of the battery average value of the battery and the candidate second temperature rise, wherein the candidate temperature rise includes the candidate first temperature rise and the candidate second temperature rise.

[0169] In one embodiment of the present disclosure, the sample data set includes a second subset, wherein each sample data in the second subset is determined when the sample change value of the average current value of the battery is greater than a set threshold; the second acquisition module 120 is also configured to execute: based on the second subset, obtain a second functional relationship.

[0170] In one embodiment of the present disclosure, the second functional relationship is a functional relationship between the candidate current average value of the battery and the candidate temperature rise.

[0171] In one embodiment of the present disclosure, the second acquisition module 120 is further configured to execute: obtaining a target change value of the average current value of the battery; selecting a target function relationship from a plurality of candidate function relationships based on the target change value; and determining the target temperature rise based on the target parameters and the target function relationship.

[0172] In one embodiment of the present disclosure, the plurality of candidate functional relationships include a first functional relationship and a fourth functional relationship, wherein the first functional relationship is determined when a sample variation value of the average current value of the battery is less than or equal to a set threshold, and the second functional relationship is determined when the sample variation value is greater than the set threshold;

[0173] The second acquisition module 120 is also configured to execute: if the target change value is less than or equal to the set threshold, use the first functional relationship as the target functional relationship; if the target change value is greater than the set threshold, use the second functional relationship as the target functional relationship.

[0174] In one embodiment of the present disclosure, the third acquisition module 130 is further configured to execute: acquiring a difference between the original temperature and the target temperature rise as the target temperature of the battery.

[0175] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0176] The battery temperature acquisition device provided by the embodiment of the present disclosure acquires the original temperature of the target area of ​​the battery protection board through a patch-type temperature acquisition device, wherein the patch-type temperature acquisition device is arranged on the battery protection board, acquires the target temperature rise of the target area caused by the battery protection board as a heat source, and obtains the target temperature of the battery based on the target temperature rise and the original temperature. Therefore, in the scenario where the battery temperature is acquired through the patch-type temperature acquisition device, the original temperature of the target area acquired by the patch-type temperature acquisition device and the target temperature rise of the target area caused by the battery protection board as a heat source can be acquired, and the target temperature of the battery is obtained by comprehensively considering the original temperature and the target temperature rise. Compared with the related art that directly uses the original temperature as the target temperature of the battery, the accuracy of the battery temperature is improved, and it is particularly suitable for battery charging scenarios.

[0177] Fig.10 is a block diagram of an electronic device 200 according to an exemplary embodiment.

[0178] like Fig.10 As shown, the electronic device 200 includes:

[0179] The memory 210 and the processor 220, a bus 230 connecting different components (including the memory 210 and the processor 220), the memory 210 stores a computer program, and when the processor 220 executes the program, the method for obtaining the battery temperature described in the embodiment of the present disclosure is implemented.

[0180] Bus 230 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. For example, these architectures include but are not limited to Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus and Peripheral Component Interconnect (PCI) bus.

[0181] The electronic device 200 typically includes a variety of electronic device readable media. These media can be any available media that can be accessed by the electronic device 200, including volatile and non-volatile media, removable and non-removable media.

[0182] The memory 210 may also include computer system readable media in the form of volatile memory, such as random access memory (RAM) 240 and / or cache memory 250. The electronic device 200 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 260 may be used to read and write non-removable, non-volatile magnetic media ( Fig.10 not shown, usually called a "hard drive"). Although Fig.10 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 230 via one or more data medium interfaces. The memory 210 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present disclosure.

[0183] A program / utility 280 having a set (at least one) of program modules 270 may be stored, for example, in the memory 210, such program modules 270 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 270 generally perform the functions and / or methods of the embodiments described in the present disclosure.

[0184] The electronic device 200 may also communicate with one or more external devices 290 (e.g., keyboards, pointing devices, displays 291, etc.), one or more devices that enable a user to interact with the electronic device 200, and / or any device that enables the electronic device 200 to communicate with one or more other computing devices (e.g., network cards, modems, etc.). Such communication may be performed through an input / output (I / O) interface 292. Furthermore, the electronic device 200 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) through a network adapter 293. Fig.10 As shown, the network adapter 293 communicates with other modules of the electronic device 200 via the bus 230. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device 200, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0185] The processor 220 executes various functional applications and data processing by running the programs stored in the memory 210 .

[0186] It should be noted that the implementation process and technical principles of the electronic device of this embodiment refer to the aforementioned explanation of the method for obtaining the battery temperature of the embodiment of the present disclosure, and will not be repeated here.

[0187] The electronic device provided by the embodiment of the present disclosure can execute the battery temperature acquisition method as described above, and collect the original temperature of the target area of ​​the battery protection board through the patch-type temperature acquisition device, wherein the patch-type temperature acquisition device is set on the battery protection board, and obtains the target temperature rise of the target area caused by the battery protection board as a heat source, and obtains the target temperature of the battery based on the target temperature rise and the original temperature. Therefore, in the scenario where the battery temperature is collected by the patch-type temperature acquisition device, the original temperature of the target area collected by the patch-type temperature acquisition device and the target temperature rise of the target area caused by the battery protection board as a heat source can be obtained, and the target temperature of the battery is obtained by comprehensively considering the original temperature and the target temperature rise. Compared with the related art that directly uses the original temperature as the target temperature of the battery, the accuracy of the battery temperature is improved, which is particularly suitable for battery charging scenarios.

[0188] In order to implement the above embodiment, the present disclosure further proposes a computer-readable storage medium on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method for obtaining the battery temperature provided by the present disclosure are implemented.

[0189] Alternatively, the computer readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, or the like.

[0190] In order to implement the above embodiments, the present disclosure further provides a computer program product, including a computer program, characterized in that when the computer program is executed by a processor of an electronic device, the method for obtaining the battery temperature as described above is implemented.

[0191] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0192] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for obtaining battery temperature, characterized in that: include: The original temperature of the target area of ​​the battery protection board is collected by a patch-type temperature collection device, wherein the patch-type temperature collection device is arranged on the battery protection board; Obtaining a target temperature rise of the target area caused by the battery protection plate being a heat source; Based on the target temperature rise and the original temperature, a target temperature of the battery is obtained.

2. The method according to claim 1, characterized in that The obtaining of the target temperature rise of the target area caused by the battery protection plate being a heat source includes: Acquire a candidate functional relationship between candidate parameters of the battery and a candidate temperature rise of the target area caused by the battery protection plate being a heat source; Obtaining target parameters of the battery; The target temperature rise is determined based on the target parameter and the candidate functional relationship.

3. The method according to claim 2, characterized in that The acquiring of the candidate functional relationship between the candidate parameters of the battery and the candidate temperature rise of the target area caused by the battery protection plate being a heat source includes: Acquire a sample data set, wherein each sample data in the sample data set includes a sample parameter of the battery at the same time and a sample temperature rise of the target area caused by the battery protection board being a heat source; Based on the sample data set, the candidate functional relationship is obtained.

4. The method according to claim 3, characterized in that: The sample data set includes a first subset, wherein each sample data in the first subset is determined when a sample variation value of an average current value of the battery is less than or equal to a set threshold; The obtaining the candidate functional relationship based on the sample data set includes: Based on the first subset, a first functional relationship is obtained.

5. The method according to claim 4, characterized in that The obtaining a first functional relationship based on the first subset includes: Based on the first subset, a third functional relationship is obtained; Based on the sample parameters of the battery and the third functional relationship, a predicted temperature rise of the target area caused by the battery protection plate being a heat source is obtained, and a sudden change moment of the predicted temperature rise is determined; Based on the sample data in the first subset at the mutation moment, a fourth functional relationship is obtained; The sum of the third functional relationship and the fourth functional relationship is obtained as the first functional relationship.

6. The method according to claim 5, characterized in that The obtaining of a third functional relationship based on the sample data in the first subset at the mutation moment includes: Obtaining a difference between the sample temperature rise at the mutation moment and the predicted temperature rise at the mutation moment as the sample second temperature rise at the mutation moment; The third functional relationship is obtained based on the sample parameters of the battery at the mutation moment and the sample second temperature rise at the mutation moment.

7. The method according to claim 5, characterized in that The third functional relationship is a functional relationship between a candidate current average value of the battery and a candidate first temperature rise, and the fourth functional relationship is a functional relationship between a candidate change value of a battery average value of the battery and a candidate second temperature rise, wherein the candidate temperature rise includes the candidate first temperature rise and the candidate second temperature rise.

8. The method according to claim 3, characterized in that The sample data set includes a second subset, wherein each sample data in the second subset is determined when a sample variation value of an average current value of the battery is greater than a set threshold; The obtaining the candidate functional relationship based on the sample data set includes: Based on the second subset, a second functional relationship is obtained.

9. The method according to claim 8, characterized in that The second functional relationship is a functional relationship between the candidate current average value of the battery and the candidate temperature rise.

10. The method according to any one of claims 2 to 9, characterized in that: The determining the target temperature rise based on the target parameter and the candidate functional relationship includes: Obtaining a target change value of an average current value of the battery; Based on the target change value, selecting a target function relationship from a plurality of candidate function relationships; The target temperature rise is determined based on the target parameter and the target function relationship.

11. The method according to claim 10, characterized in that The plurality of candidate functional relationships include a first functional relationship and a fourth functional relationship, wherein the first functional relationship is determined when a sample variation value of the average current value of the battery is less than or equal to a set threshold, and the second functional relationship is determined when the sample variation value is greater than the set threshold; The selecting a target function relationship from a plurality of candidate function relationships based on the target change value comprises: If the target change value is less than or equal to the set threshold, the first functional relationship is used as the target functional relationship; If the target change value is greater than the set threshold, the second functional relationship is used as the target functional relationship.

12. The method according to any one of claims 1 to 9, characterized in that The step of obtaining a target temperature of the battery based on the target temperature rise and the original temperature includes: A difference between the original temperature and the target temperature rise is obtained as the target temperature of the battery.

13. A device for obtaining battery temperature, characterized in that: include: A first acquisition module is configured to acquire the original temperature of a target area of ​​a battery protection board through a patch-type temperature acquisition device, wherein the patch-type temperature acquisition device is disposed on the battery protection board; A second acquisition module is configured to execute acquisition of a target temperature rise of the target area caused by the battery protection board being a heat source; The third acquisition module is configured to obtain a target temperature of the battery based on the target temperature rise and the original temperature.

14. An electronic device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: Implement the steps of the method according to any one of claims 1 to 12.

15. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 12 are implemented.

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