CN117716560A - Battery temperature detection method, battery temperature detection circuit and device - Google Patents
Battery temperature detection method, battery temperature detection circuit and device Download PDFInfo
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- CN117716560A CN117716560A CN202280004624.3A CN202280004624A CN117716560A CN 117716560 A CN117716560 A CN 117716560A CN 202280004624 A CN202280004624 A CN 202280004624A CN 117716560 A CN117716560 A CN 117716560A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
Abstract
A battery temperature detection method, circuit and device, the battery temperature detection circuit includes: the first protection plate and the second protection plate are respectively arranged on the front surface and the back surface of the battery core. The battery cell temperature detection method comprises the following steps: determining a first temperature based on the first thermistor and a second temperature based on the second thermistor (S11); the temperature of the cell is determined based on the first temperature and the second temperature (S12). The first thermistor and the second thermistor can collect the temperatures of the front side and the back side of the battery cell, so that the temperature estimation error caused by the inconsistent temperatures of the front side and the back side of the battery cell is avoided, and compared with a single patch type thermistor, the temperature reliability is improved.
Description
The disclosure relates to the technical field of batteries, and in particular relates to a battery temperature detection method, a battery temperature detection circuit and a device.
With the continuous improvement of living standard and the progress of the age, electronic products are continuously developed and updated, and become necessities in life. Most electronic products rely on batteries to power them, so the importance of battery safety is increasingly highlighted. To prevent the battery temperature from being too high, the battery temperature is detected. The thermistor is a sensor resistor, the resistance value of which changes along with the change of temperature, the sensitivity of the thermistor is higher, the working temperature range is wide, the stability is strong, and the thermistor is mostly manufactured into a special detection element.
In the related art, the method for acquiring the battery temperature comprises the following steps: the lead-type NTC is directly adhered to the battery core, or a single NTC is adopted on the protective plate of the battery and the NTC fitting temperature on the main plate is adopted. However, in a practical application scenario, the adoption of the lead-type NTC to collect the temperature of the battery cell can cause the trouble of PCB layout and production flow, and the joint angle and position can directly influence the sampling precision. The use of a single patch NTC may result in a large temperature estimation error, low reliability, and increase the load on the CPU.
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a method, a circuit and a device for detecting the temperature of a battery, which are used for accurately measuring the temperature of the battery.
According to a first aspect of embodiments of the present disclosure, there is provided a method of detecting a temperature of a battery cell, applied to a battery temperature detection circuit, the battery temperature detection circuit including: the first thermistor is fixed on the first protective plate in a patch mode, and the second thermistor is fixed on the second protective plate in a patch mode, and the first protective plate and the second protective plate are respectively arranged on the front surface and the back surface of the battery cell; the method comprises the following steps: determining a first temperature based on the first thermistor and a second temperature based on the second thermistor; the temperature of the battery cell is determined based on the first temperature and the second temperature.
In one embodiment, a third temperature is determined based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode; determining the temperature of the cell based on the first temperature and the second temperature, comprising: determining a temperature of the cell based on the first temperature, the second temperature, and the third temperature.
In one embodiment, a fourth temperature is determined based on a fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode; determining the temperature of the cell based on the first temperature and the second temperature, comprising: determining a temperature of the cell based on the first temperature, the second temperature, and the fourth temperature.
In one embodiment, a third temperature is determined based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode; determining a fourth temperature based on the fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode; determining the temperature of the cell based on the first temperature and the second temperature, comprising: determining a temperature of the battery cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature.
In one embodiment, determining the temperature of the cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature comprises: determining a mean temperature between the first temperature and the second temperature; and carrying out weighting treatment on the average temperature, the third temperature and the fourth temperature to obtain the temperature of the battery cell.
In one embodiment, the battery temperature detection circuit further includes: and the main control chip is used for executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
In one embodiment, the method further comprises: before the main control chip executes the step of determining the temperature of the battery cell based on the first temperature and the second temperature, the main control chip is determined to be in a working state based on the electric quantity and/or the electric current of the battery cell.
In one embodiment, the method further comprises: and if the main control chip is determined to be in a dormant state based on the electric quantity and/or the electric current of the battery cell, periodically waking up the main control chip, and executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
According to a second aspect of embodiments of the present disclosure, there is provided a circuit for battery temperature detection, comprising: the first protection plate and the second protection plate are respectively arranged on the front surface and the back surface of the battery cell; a first thermistor, in the form of a patch, fixed to the first protective plate for determining a first temperature; the second thermistor is fixed on the second protection plate in a patch mode and is used for determining a second temperature; and the main control chip is arranged on the first protection plate or the second protection plate and is used for determining the temperature of the battery cell based on the first temperature and the second temperature.
In one embodiment, the first thermistor is fixed at a first edge position of the first protection plate far away from the heating device mounted on the protection plate and close to the battery cell; the second thermistor is fixed at a second edge position of the second protection plate, which is far away from a heating device arranged on the protection plate and is close to the battery cell.
In one embodiment, the first protective plate has more heat generating devices than the second protective plate; the battery circuit further includes: and a third thermistor, in the form of a patch, fixed at a central position corresponding to the heat generating device mounted on the first protective plate, for determining a third temperature.
In one embodiment, the battery circuit further comprises: and the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode and is used for determining a fourth temperature.
According to a third aspect of embodiments of the present disclosure, there is provided an apparatus for battery temperature detection, applied to a battery temperature detection circuit, the battery temperature detection circuit including: a first thermistor fixed in a first protective plate in a patch form, and a second thermistor fixed in a second protective plate in a patch form, the first protective plate and the second protective plate being provided separately on the front and the back of the battery cell, the device comprising: a detection unit for determining a first temperature based on the first thermistor and a second temperature based on the second thermistor; and the processing unit is used for determining the temperature of the battery cell based on the first temperature and the second temperature.
In one embodiment, the detection unit is further configured to determine a third temperature based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode; the processing unit determines the temperature of the battery cell based on the first temperature and the second temperature in the following manner: determining a temperature of the cell based on the first temperature, the second temperature, and the third temperature.
In one embodiment, the detection unit is further configured to determine a fourth temperature based on a fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode; the processing unit determines the temperature of the battery cell based on the first temperature and the second temperature in the following manner: determining a temperature of the cell based on the first temperature, the second temperature, and the fourth temperature.
In one embodiment, the detection unit is further configured to determine a third temperature based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode; and determining a fourth temperature based on the fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode; the processing unit determines the temperature of the battery cell based on the first temperature and the second temperature in the following manner: determining a temperature of the battery cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature.
In one embodiment, the processing unit determines the temperature of the cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature in the following manner: determining a mean temperature between the first temperature and the second temperature; and carrying out weighting treatment on the average temperature, the third temperature and the fourth temperature to obtain the temperature of the battery cell.
In one embodiment, the battery temperature detection circuit further includes: and the main control chip is used for executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
In one embodiment, the apparatus further comprises: before the main control chip executes the step of determining the temperature of the battery cell based on the first temperature and the second temperature, the processing unit determines that the main control chip is in a working state based on the electric quantity and/or the electric current of the battery cell.
In one embodiment, the apparatus further comprises: and if the processing unit determines that the main control chip is in a dormant state based on the electric quantity and/or the electric current of the battery cell, the processing unit wakes up the main control chip periodically, and the step of determining the temperature of the battery cell based on the first temperature and the second temperature is executed.
According to a fourth aspect of embodiments of the present disclosure, there is provided a battery temperature detection device including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: the method of battery temperature detection described in any one of the embodiments of the first aspect is performed.
According to a fifth aspect of embodiments of the present disclosure, there is provided a storage medium having instructions stored therein, which when executed by a processor of a terminal, enable the terminal to perform the method of battery temperature detection described in any one of the embodiments of the first aspect.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the battery temperature detection circuit includes: the first protection plate and the second protection plate are symmetrically arranged on the front surface and the back surface of the battery cell, the first thermistor is fixed on the first protection plate in a patch mode, and the second thermistor is fixed on the second protection plate in a patch mode, so that the temperatures of the front surface and the back surface of the battery cell can be collected through the first thermistor and the second thermistor, and errors in temperature estimation caused by inconsistent temperatures of the front surface and the back surface of the battery cell are avoided. The reliability of temperature is improved compared to a single chip thermistor.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flow chart illustrating a method of a cell temperature detection circuit according to an exemplary embodiment.
Fig. 2 is a flow chart illustrating a method of a cell temperature detection circuit according to an exemplary embodiment.
Fig. 3 is a flow chart illustrating a method of a cell temperature detection circuit according to an exemplary embodiment.
Fig. 4 is a flow chart illustrating a method of a cell temperature detection circuit according to an exemplary embodiment.
Fig. 5 is a block diagram of a cell temperature detection circuit according to an exemplary embodiment.
Fig. 6 is a layout view of a first protective plate according to an exemplary embodiment.
Fig. 7 is a plate layout view of a second protection plate according to an exemplary embodiment.
Fig. 8 is a circuit diagram illustrating a cell temperature detection according to an exemplary embodiment.
Fig. 9 is a block diagram illustrating a cell temperature detection circuit arrangement according to an exemplary embodiment.
Fig. 10 is a block diagram illustrating a cell temperature detection circuit arrangement according to an exemplary embodiment.
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure.
With the continuous improvement of living standard and the progress of the age, electronic products are continuously developed and updated, and become necessities in life. Most electronic products rely on batteries to power them, so the importance of battery safety is increasingly highlighted. The electronic components and the battery are very sensitive to temperature, the performance of the battery can be seriously affected by the too high temperature, and the conditions of excessive scalding, even smoking, ignition and the like of the electronic product caused by the too high temperature of the battery can also occur in life. Therefore, in order to prevent the battery from being excessively high in temperature, the temperature is detected. The thermistor is a sensor resistor, the resistance value of which changes along with the change of temperature, the sensitivity of the thermistor is higher, the working temperature range is wide, the stability is strong, and the thermistor is mostly manufactured into a special detection element. In the related art, the method for collecting the temperature of the battery cell comprises the following steps: the lead-type NTC is directly adhered to the battery core, or a single NTC is adopted on the protective plate of the battery and the NTC fitting temperature on the main plate is adopted. However, in a practical application scenario, the adoption of the lead-type NTC to collect the temperature of the battery cell can cause the trouble of PCB layout and production flow, and the joint angle and position can directly influence the sampling precision. The use of a single patch NTC may result in a large temperature estimation error, low reliability, and increase the load on the CPU.
Thus, the present disclosure provides a battery cell temperature detection method applied to a battery temperature detection circuit, the battery temperature detection circuit comprising: the device comprises a first protection plate, a second protection plate, a first thermistor, a second thermistor and a main control chip. The first protection plate and the second protection plate are symmetrically arranged on the front surface and the back surface of the battery cell; a first thermistor fixed on the first protective plate in a patch form; the second thermistor is fixed on the second protection plate in a patch mode. The main control chip determines a first temperature based on the first thermistor, determines a second temperature based on the second thermistor, and determines a temperature of the battery cell based on the first temperature and the second temperature. Through the temperature of collecting the electric core both sides, can more accurate acquisition electric core's temperature, reduce the error.
Fig. 1 is a flowchart illustrating a method for detecting a temperature of a battery cell according to an exemplary embodiment, and as shown in fig. 1, the method for detecting a temperature of a battery cell is used in a battery circuit for detecting a temperature of a battery cell, and a type of a terminal to which the method for detecting a temperature of a battery cell is applied is not limited in the embodiments of the present disclosure. The method for detecting the temperature of the battery cell comprises the following steps.
In step S11, a first temperature is determined based on the first thermistor, and a second temperature is determined based on the second thermistor.
In the embodiment of the disclosure, the position of the first thermistor is fixed at a position far away from a heating device arranged on the protection plate and close to the first edge of the battery cell; the position of the second thermistor is fixed at a position far away from the heating device arranged on the protection plate and close to the second edge of the battery cell. The main control chip is used for determining the first temperature based on the temperature of one side of the collecting core of the first thermistor. The main control chip acquires the temperature of the other side of the current core based on the second thermistor, and determines the second temperature.
In step S12, the temperature of the cell is determined based on the first temperature and the second temperature.
In an embodiment of the present disclosure, a main control chip processes a first temperature and a second temperature, including: and determining the average temperature between the first temperature and the second temperature, and weighting the average temperature to obtain the temperature of the battery cell.
According to the embodiment of the disclosure, in the using process of the battery, the front temperature and the back temperature of the battery core are greatly different, and if the temperature of the battery core can not be accurately obtained through only one patch type thermistor, the error is relatively large. The chip thermistor is respectively arranged at two sides of the battery cell, so that the temperature of the battery cell can be obtained relatively accurately. By taking the average value of the temperatures at two sides and weighting the average value temperature, more accurate cell temperature can be obtained. For battery circuits with different layouts, only the coefficient of the weighting process needs to be changed.
Fig. 2 is a flowchart illustrating yet another method for detecting a temperature of a battery cell according to an exemplary embodiment, and as shown in fig. 2, the method for detecting a temperature of a battery cell is used in a battery circuit for detecting a temperature of a battery cell, and a type of a terminal to which the method for detecting a temperature of a battery cell is applied in an embodiment of the disclosure is not limited. The method for detecting the temperature of the battery cell comprises the following steps.
In step S21, a first temperature is determined based on the first thermistor, a second temperature is determined based on the second thermistor, and a third temperature is determined based on the third thermistor.
In an embodiment of the present disclosure, more heat generating devices are mounted on the first protective plate than on the second protective plate.
In the embodiment of the disclosure, the position of the first thermistor is fixed at a position far away from a heating device arranged on the protection plate and close to the first edge of the battery cell; the position of the second thermistor is fixed at a position far away from a heating device arranged on the protective plate and close to the second edge of the battery cell; the third thermistor is fixed at a center position corresponding to the heat generating device mounted on the first protection plate. The main control chip is used for determining the first temperature based on the temperature of one side of the collecting core of the first thermistor. The main control chip acquires the temperature of the other side of the current core based on the second thermistor, and determines the second temperature. The main control chip acquires the temperature of the center position of the heating device based on the third thermistor, and determines a third temperature.
In step S22, the temperature of the cell is determined based on the first temperature, the second temperature, and the third temperature.
In the embodiment of the disclosure, the processing of the first temperature, the second temperature and the third temperature by the main control chip includes: and determining the average temperature between the first temperature and the second temperature, and carrying out weighting treatment on the average temperature and the third temperature to obtain the temperature of the battery cell.
According to the embodiment of the disclosure, in the use process of the battery, the heating device can generate heat, and the temperature of the first thermistor and the second thermistor acquired the temperature of the battery core is disturbed due to the temperature rise of the heating device, so that the acquired temperature of the battery core is large in error compared with the actual temperature of the battery core. According to the method and the device, the temperature of the central position of the heating device is acquired through the third thermistor, and the acquired temperature is weighted, so that the temperature of the battery cell can be estimated more accurately. For battery circuits with different layouts, only the coefficient of the weighting process needs to be changed.
Fig. 3 is a flowchart illustrating yet another method for detecting a temperature of a battery cell according to an exemplary embodiment, and as shown in fig. 3, the method for detecting a temperature of a battery cell is used in a battery circuit for detecting a temperature of a battery cell, and a type of a terminal to which the method for detecting a temperature of a battery cell is applied is not limited in the embodiments of the present disclosure. The method for detecting the temperature of the battery cell comprises the following steps.
In step S31, a first temperature is determined based on the first thermistor, a second temperature is determined based on the second thermistor, and a fourth temperature is determined based on the fourth thermistor.
In an embodiment of the present disclosure, more heat generating devices are mounted on the first protective plate than on the second protective plate.
In the embodiment of the disclosure, the position of the first thermistor is fixed at a position far away from a heating device arranged on the protection plate and close to the first edge of the battery cell; the position of the second thermistor is fixed at a position far away from a heating device arranged on the protective plate and close to the second edge of the battery cell; the position of the fourth thermistor is fixed on the second protection plate at a position close to the controller. The main control chip is used for determining the first temperature based on the temperature of one side of the collecting core of the first thermistor. The main control chip acquires the temperature of the other side of the current core based on the second thermistor, and determines the second temperature. The main control chip is used for determining a fourth temperature based on the temperature radiated by the fourth thermistor acquisition controller.
In step S32, the temperature of the cell is determined based on the first temperature, the second temperature, and the fourth temperature.
In the embodiment of the disclosure, the processing of the first temperature, the second temperature and the fourth temperature by the main control chip includes: and determining the average temperature between the first temperature and the second temperature, and carrying out weighting treatment on the average temperature and the fourth temperature to obtain the temperature of the battery cell.
According to embodiments of the present disclosure, the controller may generate heat during use of the electronic device. Because the temperature of the controller is increased, the temperature of the collected battery core of the first thermistor and the second thermistor is disturbed, and the error of the collected battery core temperature is large compared with the actual battery core temperature. According to the battery cell temperature estimation method and device, the temperature radiated by the controller is acquired through the fourth thermistor, and the acquired temperature is weighted, so that the battery cell temperature can be estimated more accurately. For battery circuits with different layouts, only the coefficient of the weighting process needs to be changed.
Fig. 4 is a flowchart illustrating yet another method for detecting a temperature of a battery cell according to an exemplary embodiment, and as shown in fig. 4, the method for detecting a temperature of a battery cell is used in a battery circuit for detecting a temperature of a battery cell, and the type of a terminal to which the method for detecting a temperature of a battery cell is applied in an embodiment of the disclosure is not limited. The method for detecting the temperature of the battery cell comprises the following steps.
In step S41, a first temperature is determined based on the first thermistor, a second temperature is determined based on the second thermistor, a third temperature is determined based on the third thermistor, and a fourth temperature is determined based on the fourth thermistor.
In an embodiment of the disclosure, the second protection plate is used for being connected with a controller for controlling the operation of the battery cell.
In the embodiment of the disclosure, the position of the first thermistor is fixed at a position far away from a heating device arranged on the protection plate and close to the first edge of the battery cell; the position of the second thermistor is fixed at a position far away from a heating device arranged on the protective plate and close to the second edge of the battery cell; the position of the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate; the position of the fourth thermistor is fixed on the second protection plate at a position close to the controller. The main control chip is used for determining the first temperature based on the temperature of one side of the collecting core of the first thermistor. The main control chip acquires the temperature of the other side of the current core based on the second thermistor, and determines the second temperature. The main control chip acquires the temperature of the center position of the heating device based on the third thermistor, and determines a third temperature. The main control chip is used for determining a fourth temperature based on the temperature radiated by the fourth thermistor acquisition controller.
In step S42, the temperature of the cell is determined based on the first temperature, the second temperature, the third temperature, and the fourth temperature.
In the embodiment of the disclosure, the processing of the first temperature, the second temperature, the third temperature and the fourth temperature by the main control chip includes: and determining the average temperature between the first temperature and the second temperature, and carrying out weighting treatment on the average temperature, the third temperature and the fourth temperature to obtain the temperature of the battery cell.
According to embodiments of the present disclosure, the heat generating device and the controller may generate heat during use of the electronic device. Because the temperature of the heating device and the temperature of the controller are increased, the temperature of the first thermistor and the second thermistor are acquired, and the acquired battery cell temperature has large error compared with the actual battery cell temperature. According to the battery temperature measuring device, the temperature of the central position of the heating device is collected through the third thermistor, and the temperature radiated by the controller is collected through the fourth thermistor, so that the accuracy of battery temperature measurement can be improved. The average temperature between the first temperature and the second temperature is determined, and the average temperature, the third temperature and the fourth temperature are weighted, so that the cell temperature can be estimated more accurately. For battery circuits with different layouts, only the coefficient of the weighting process needs to be changed.
In the embodiment of the disclosure, the first temperature, the second temperature, the third temperature and the fourth temperature are acquired through the main control chip, and the temperature of the battery cell is estimated. The main control chip is adopted for temperature estimation, so that the burden of a CPU can be reduced.
In the embodiment of the disclosure, a main control chip is preset with two modes of a working state and a dormant state, and the main control chip determines the mode based on the electric quantity and/or the current of the battery cell. When the battery is in the process of charging or discharging, the current of the battery core is greater than or equal to the current threshold value, and the main control chip is in a working state, and the temperature of the battery core is acquired and estimated at a preset high frequency. The main control chip in the working mode can estimate the temperature of the battery cell in real time, and the accuracy of battery cell temperature acquisition is improved.
In the embodiment of the disclosure, the master control chip determines the mode based on the electric quantity and/or the current of the battery cell. When the electric quantity of the battery core is smaller than the electric quantity threshold value or the electric current of the battery core is smaller than the electric current threshold value, the battery is in a low-electric-quantity state at the moment, and the main control chip is in a dormant state. The main control chip in the sleep mode pauses the acquisition and estimation of the temperature of the battery cell. The main control chip is provided with a timer, and the main control chip is periodically awakened to acquire and estimate the temperature of the battery cell according to the time set by the timer. Through the sleep mode of the main control chip, the frequency of collecting and estimating the temperature of the battery core is reduced under the condition of low battery power, and the power of the battery can be saved. The main control chip is periodically awakened by the timer to acquire and estimate the temperature of the battery cell, so that the change of the temperature of the battery cell can be detected.
Fig. 5 is a block diagram of a cell temperature detection circuit according to an exemplary embodiment, and as shown in fig. 5, the cell temperature detection circuit 100 includes: the battery cell 110, the first protection plate 120, the second protection plate 130, the first thermistor 140, and the second thermistor 150. In the present disclosure, the first protection plate 120 and the second protection plate 130 are symmetrically disposed at both sides of the battery cell 110. The first thermistor 140 is a chip thermistor and is fixed to the first protection plate 120 in a chip form, and the second thermistor 150 is a chip thermistor and is fixed to the second protection plate 130 in a chip form.
In one embodiment of the present disclosure, the first thermistor 140 and the second thermistor 150 are respectively located on the protection plate near two sides of the battery cell 110, so that two side temperatures of the battery cell can be respectively obtained. For example, in the actual use process of the battery, the temperature difference between the front side and the back side of the battery is relatively large, and if the temperature is collected by only relying on a thermistor on one side, the error is large, so that the temperature of the battery core cannot be accurately obtained. Therefore, the two thermistors in the present disclosure commonly acquire temperatures on both sides of the current core, and measurement accuracy can be improved.
In one embodiment of the present disclosure, the first thermistor 140 is fixed on the first protection plate 120, and other heat generating devices, such as a triode, a disposable fuse, an integrated circuit module, a main control chip, an auxiliary power supply, etc., are mounted on the first protection plate 120. In order to reduce the interference of the heating devices, the temperature of one side of the battery cell can be more accurately acquired by the first thermistor 140, and the position of the first thermistor 140 is fixed at a position far away from the heating devices mounted on the protection plate and close to the first edge position of the battery cell.
Fig. 6 is a layout view of a first protective plate according to an exemplary embodiment of the present disclosure. Referring to fig. 6, the thermistor NTC1 is fixed at a position distant from other heat generating devices on the protection plate, such as Q1, Q3, RS1, etc., and the thermistor NTC1 is fixed at the lower left corner of the first protection plate, i.e., at an edge position near one side of the battery cell.
In one embodiment of the present disclosure, the second thermistor 150 is fixed on the second protection plate 130, and other heat generating devices such as a triode, a disposable fuse, an electricity meter module circuit, an FPC connection pad, etc. are mounted on the second protection plate 130. In order to reduce the interference of these heat generating devices, it is determined that the second thermistor 150 can more accurately collect the temperature of the other side of the battery cell, and the position of the second thermistor 150 is fixed at a position far from the heat generating devices mounted on the protection plate and close to the second edge position of the battery cell.
Fig. 7 is a plate layout view of a second protection plate according to an exemplary embodiment of the present disclosure. Referring to fig. 7, the thermistor NTC2 is fixed at a position far from other heat generating devices on the protection plate, such as Q2, Q4, RS2, etc., and the thermistor NTC2 is fixed at the upper left corner of the second protection plate, i.e., near the edge position of the other side of the battery cell.
In one embodiment of the present disclosure, more heat generating devices are mounted on the first protective plate than on the second protective plate.
In an embodiment of the disclosure, the battery circuit further includes a third thermistor, where the third thermistor is a patch type thermistor and is fixed in a patch type at a central position corresponding to the heat generating device mounted on the first protection plate. As shown in fig. 6, the position where the thermistor NTC3 is fixed is the center position of the heat generating device including Q1, Q3, RS1, and the like. For example, during battery use, when the temperature of the heating device increases, the collected core temperatures of the first thermistor and the second thermistor are disturbed, so that the collected core temperature has a large error compared with the actual core temperature. According to the method and the device, the temperature of the central position of the heating device is acquired through the third thermistor, and the acquired temperature is weighted, so that the temperature of the battery cell can be estimated more accurately.
In an embodiment of the disclosure, the second protection board is used for being connected with a controller for controlling the operation of the battery cell.
In an embodiment of the disclosure, the battery circuit further includes a fourth thermistor, where the fourth thermistor is a patch type thermistor and is fixed on the second protection board in a patch type at a position close to the controller. As shown in fig. 7, the thermistor NTC4 is fixed at a position close to the controller, and the controller generates heat during actual use. For example, when the controller temperature increases, the first thermistor, the second thermistor, and the third thermistor are disturbed to collect temperatures, resulting in a large error in the estimated cell temperature compared to the actual cell temperature. According to the method and the device, the temperature radiated by the controller is collected, the collected temperature is weighted, and the temperature of the battery cell can be estimated more accurately.
Fig. 8 is a circuit diagram illustrating a cell temperature detection according to an exemplary embodiment of the present disclosure. Referring to fig. 8, pcm represents a protection circuit module, R1, R2, R3, R4 are resistors, NTC1, NTC2, NTC3, NTC4 are thermistors, ARM-STM32 is a 32bit serial single chip microcomputer, SDA is a bidirectional data line, SCL is a clock line, and the battery circuit further includes a main control chip and an auxiliary power supply. The main control chip is adopted for temperature estimation, so that the burden of a CPU can be reduced.
It should be understood by those skilled in the art that the various implementations/embodiments of the present disclosure may be used in combination with the foregoing embodiments or may be used independently. Whether used alone or in combination with the previous embodiments, the principles of implementation are similar. In the practice of the present disclosure, some of the examples are described in terms of implementations that are used together. Of course, those skilled in the art will appreciate that such illustration is not limiting of the disclosed embodiments.
Based on the same conception, the embodiment of the disclosure also provides a battery cell temperature detection device.
It can be appreciated that, in order to achieve the above-mentioned functions, the battery cell temperature detection device provided in the embodiments of the present disclosure includes a hardware structure and/or a software module that perform each function. The disclosed embodiments may be implemented in hardware or a combination of hardware and computer software, in combination with the various example elements and algorithm steps disclosed in the embodiments of the disclosure. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of the embodiments of the present disclosure.
Fig. 9 is a block diagram 100 of a cell temperature detection device according to an exemplary embodiment. Referring to fig. 9, the apparatus includes a detection unit 101 and a processing unit 102.
The detection unit 101 is configured to determine a first temperature based on the first thermistor and a second temperature based on the second thermistor.
The processing unit 102 is configured to determine a temperature of the battery cell based on the first temperature and the second temperature.
In an embodiment of the present disclosure, the detection unit 101 is further configured to determine a third temperature based on a third thermistor; the third thermistor is fixed in a patch form at a center position corresponding to the heat generating device mounted on the first protective plate. The processing unit 102 determines the temperature of the cell based on the first temperature and the second temperature in the following manner: the temperature of the cell is determined based on the first temperature, the second temperature, and the third temperature.
In an embodiment of the present disclosure, the detection unit 101 is further configured to determine a fourth temperature based on a fourth thermistor; the fourth thermistor is fixed at a position of the second protection plate close to the controller in a patch mode. The processing unit 102 determines the temperature of the cell based on the first temperature and the second temperature in the following manner: the temperature of the cell is determined based on the first temperature, the second temperature, and the fourth temperature.
In an embodiment of the present disclosure, the detection unit 101 is further configured to determine a third temperature based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode; and determining a fourth temperature based on the fourth thermistor; the fourth thermistor is fixed at a position of the second protection plate close to the controller in a patch mode. The processing unit 102 determines the temperature of the cell based on the first temperature and the second temperature in the following manner: the temperature of the cell is determined based on the first temperature, the second temperature, the third temperature, and the fourth temperature.
In the disclosed embodiment, the processing unit 102 determines the temperature of the battery cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature in the following manner: determining a mean temperature between the first temperature and the second temperature; and weighting the average temperature, the third temperature and the fourth temperature to obtain the temperature of the battery cell.
In an embodiment of the present disclosure, the battery temperature detection circuit further includes: and the main control chip is used for executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
In the embodiment of the present disclosure, before the main control chip performs the step of determining the temperature of the battery cell based on the first temperature and the second temperature, the processing unit 102 determines that the main control chip is in the working state based on the electric quantity and/or the electric current of the battery cell.
In the embodiment of the present disclosure, if the processing unit determines that the main control chip is in the sleep state based on the electric quantity and/or the electric current of the electric core, the processing unit 102 wakes up the main control chip periodically, and performs the step of determining the temperature of the electric core based on the first temperature and the second temperature.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Fig. 10 is a block diagram illustrating an apparatus 200 for cell temperature detection according to an exemplary embodiment. For example, apparatus 200 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.
Referring to fig. 10, the apparatus 200 may include one or more of the following components: a processing component 202, a memory 204, a power component 206, a multimedia component 208, an audio component 210, an input/output (I/O) interface 212, a sensor component 214, and a communication component 216.
The processing component 202 generally controls overall operation of the apparatus 200, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 202 may include one or more processors 220 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 202 can include one or more modules that facilitate interactions between the processing component 202 and other components. For example, the processing component 202 may include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.
The memory 204 is configured to store various types of data to support operations at the apparatus 200. Examples of such data include instructions for any application or method operating on the device 200, contact data, phonebook data, messages, pictures, videos, and the like. The memory 204 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power component 206 provides power to the various components of the device 200. The power components 206 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 200.
The multimedia component 208 includes a screen between the device 200 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 200 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 210 is configured to output and/or input audio signals. For example, the audio component 210 includes a Microphone (MIC) configured to receive external audio signals when the device 200 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 204 or transmitted via the communication component 216. In some embodiments, audio component 210 further includes a speaker for outputting audio signals.
The I/O interface 212 provides an interface between the processing assembly 202 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 214 includes one or more sensors for providing status assessment of various aspects of the apparatus 200. For example, the sensor assembly 214 may detect the on/off state of the device 200, the relative positioning of the components, such as the display and keypad of the device 200, the sensor assembly 214 may also detect a change in position of the device 200 or a component of the device 200, the presence or absence of user contact with the device 200, the orientation or acceleration/deceleration of the device 200, and a change in temperature of the device 200. The sensor assembly 214 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 214 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 214 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 216 is configured to facilitate communication between the apparatus 200 and other devices in a wired or wireless manner. The device 200 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 216 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 200 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 204, including instructions executable by processor 220 of apparatus 200 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
It is further understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
It will be further understood that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.
Claims (22)
- A battery temperature detection method, characterized by being applied to a battery temperature detection circuit, the battery temperature detection circuit comprising: the first thermistor is fixed on the first protective plate in a patch mode, and the second thermistor is fixed on the second protective plate in a patch mode, and the first protective plate and the second protective plate are respectively arranged on the front surface and the back surface of the battery cell; the method comprises the following steps:determining a first temperature based on the first thermistor and a second temperature based on the second thermistor;The temperature of the battery cell is determined based on the first temperature and the second temperature.
- The method according to claim 1, wherein the method further comprises:determining a third temperature based on the third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode;determining the temperature of the cell based on the first temperature and the second temperature, comprising:determining a temperature of the cell based on the first temperature, the second temperature, and the third temperature.
- The method according to claim 1, wherein the method further comprises:determining a fourth temperature based on the fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode;determining the temperature of the cell based on the first temperature and the second temperature, comprising:determining a temperature of the cell based on the first temperature, the second temperature, and the fourth temperature.
- The method according to claim 1, wherein the method further comprises:determining a third temperature based on the third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode;Determining a fourth temperature based on the fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode;determining the temperature of the cell based on the first temperature and the second temperature, comprising:determining a temperature of the battery cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature.
- The method of claim 4, wherein determining the temperature of the cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature comprises:determining a mean temperature between the first temperature and the second temperature;and carrying out weighting treatment on the average temperature, the third temperature and the fourth temperature to obtain the temperature of the battery cell.
- The method according to any one of claims 1 to 5, wherein the battery temperature detection circuit further comprises:and the main control chip is used for executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
- The method of claim 6, wherein the method further comprises:Before the main control chip executes the step of determining the temperature of the battery cell based on the first temperature and the second temperature, the main control chip is determined to be in a working state based on the electric quantity and/or the electric current of the battery cell.
- The method of claim 6, wherein the method further comprises:and if the main control chip is determined to be in a dormant state based on the electric quantity and/or the electric current of the battery cell, periodically waking up the main control chip, and executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
- A battery temperature detection circuit, characterized by comprising:the first protection plate and the second protection plate are respectively arranged on the front surface and the back surface of the battery cell;a first thermistor, in the form of a patch, fixed to the first protective plate for determining a first temperature;the second thermistor is fixed on the second protection plate in a patch mode and is used for determining a second temperature;and the main control chip is arranged on the first protection plate or the second protection plate and is used for determining the temperature of the battery cell based on the first temperature and the second temperature.
- The battery temperature detection circuit according to claim 9, wherein,The first thermistor is fixed at a first edge position of the first protection plate, which is far away from a heating device arranged on the protection plate and is close to the battery cell;the second thermistor is fixed at a second edge position of the second protection plate, which is far away from a heating device arranged on the protection plate and is close to the battery cell.
- The battery temperature detection circuit according to claim 9, wherein the first protective plate has more heat generating devices than the second protective plate;the battery circuit further includes:and a third thermistor, in the form of a patch, fixed at a central position corresponding to the heat generating device mounted on the first protective plate, for determining a third temperature.
- The battery temperature detection circuit of claim 9, wherein the battery circuit further comprises:and the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode and is used for determining a fourth temperature.
- A battery temperature detection device, characterized by being applied to a battery temperature detection circuit, the battery temperature detection circuit comprising: a first thermistor fixed in a first protective plate in a patch form, and a second thermistor fixed in a second protective plate in a patch form, the first protective plate and the second protective plate being provided separately on the front and the back of the battery cell, the device comprising:A detection unit for determining a first temperature based on the first thermistor and a second temperature based on the second thermistor;and the processing unit is used for determining the temperature of the battery cell based on the first temperature and the second temperature.
- The apparatus of claim 13, wherein the device comprises a plurality of sensors,the detection unit is further used for determining a third temperature based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode;the processing unit determines the temperature of the battery cell based on the first temperature and the second temperature in the following manner:determining a temperature of the cell based on the first temperature, the second temperature, and the third temperature.
- The apparatus of claim 13, wherein the device comprises a plurality of sensors,the detection unit is also used for determining a fourth temperature based on a fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode;the processing unit determines the temperature of the battery cell based on the first temperature and the second temperature in the following manner:determining a temperature of the cell based on the first temperature, the second temperature, and the fourth temperature.
- The apparatus of claim 13, wherein the device comprises a plurality of sensors,the detection unit is further used for determining a third temperature based on a third thermistor; the third thermistor is fixed at the center position corresponding to the heating device arranged on the first protection plate in a patch mode; and determining a fourth temperature based on the fourth thermistor; the fourth thermistor is fixed at the position, close to the controller, of the second protection plate in a patch mode;the processing unit determines the temperature of the battery cell based on the first temperature and the second temperature in the following manner:determining a temperature of the battery cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature.
- The apparatus of claim 16, wherein the processing unit determines the temperature of the cell based on the first temperature, the second temperature, the third temperature, and the fourth temperature by:determining a mean temperature between the first temperature and the second temperature;and carrying out weighting treatment on the average temperature, the third temperature and the fourth temperature to obtain the temperature of the battery cell.
- The apparatus according to any one of claims 13 to 17, wherein the battery temperature detection circuit further comprises:and the main control chip is used for executing the step of determining the temperature of the battery cell based on the first temperature and the second temperature.
- The apparatus of claim 18, wherein the apparatus further comprises:before the main control chip executes the step of determining the temperature of the battery cell based on the first temperature and the second temperature, the processing unit determines that the main control chip is in a working state based on the electric quantity and/or the electric current of the battery cell.
- The apparatus of claim 18, wherein the apparatus further comprises:and if the processing unit determines that the main control chip is in a dormant state based on the electric quantity and/or the electric current of the battery cell, the processing unit wakes up the main control chip periodically, and the step of determining the temperature of the battery cell based on the first temperature and the second temperature is executed.
- A battery temperature detection device, characterized by comprising:a processor;a memory for storing processor-executable instructions;Wherein the processor is configured to: performing the battery temperature detection method of any one of claims 1 to 8.
- A storage medium having instructions stored therein that, when executed by a processor of a terminal, enable the terminal to perform the battery temperature detection method of any one of claims 1 to 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2022/099596 WO2023240637A1 (en) | 2022-06-17 | 2022-06-17 | Battery temperature detection method, battery temperature detection circuit and apparatus |
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| CN202280004624.3A Pending CN117716560A (en) | 2022-06-17 | 2022-06-17 | Battery temperature detection method, battery temperature detection circuit and device |
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| WO (1) | WO2023240637A1 (en) |
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| US20110210703A1 (en) * | 2010-03-01 | 2011-09-01 | Boston-Power, Inc. | Thermal Sensor Device With Average Temperature And Hot Spot Feedback |
| CN104734214B (en) * | 2013-12-18 | 2018-08-14 | 比亚迪股份有限公司 | Portable device and its charge/discharge control method |
| CN106486976A (en) * | 2016-11-23 | 2017-03-08 | 宇龙计算机通信科技(深圳)有限公司 | Battery protecting apparatus and battery protecting method |
| CN108196648A (en) * | 2017-12-28 | 2018-06-22 | 努比亚技术有限公司 | Detection method, device and the computer readable storage medium of febrile state |
| CN108767375B (en) * | 2018-05-16 | 2021-08-24 | 南通鼎鑫电池有限公司 | Lead-acid storage battery pack capable of being preheated in low-temperature environment |
| CN210403961U (en) * | 2019-10-09 | 2020-04-24 | Oppo广东移动通信有限公司 | Electronic device |
| CN111890938A (en) * | 2020-07-31 | 2020-11-06 | 北京骑胜科技有限公司 | Battery management method, system, medium, battery, and electric vehicle |
| CN113758965A (en) * | 2021-09-08 | 2021-12-07 | 东软睿驰汽车技术（沈阳）有限公司 | Method and device for evaluating heat preservation performance of heat preservation material and electronic equipment |
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