CN117460961A - Battery temperature detection circuit and method, battery protection board, battery and mobile terminal - Google Patents
Battery temperature detection circuit and method, battery protection board, battery and mobile terminal Download PDFInfo
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- CN117460961A CN117460961A CN202280004131.XA CN202280004131A CN117460961A CN 117460961 A CN117460961 A CN 117460961A CN 202280004131 A CN202280004131 A CN 202280004131A CN 117460961 A CN117460961 A CN 117460961A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
Abstract
The present disclosure relates to a battery temperature detection circuit, a method, a battery protection board, a battery and a mobile terminal, the battery temperature detection circuit includes: the battery cell temperature acquisition sub-circuit and the gain sub-circuit are connected with the correction sub-circuit; the battery cell temperature acquisition sub-circuit is configured to acquire battery cell temperatures of a plurality of different parts of a battery cell of the battery, and determine battery cell acquisition temperatures according to the plurality of battery cell temperatures; the gain subcircuit is configured to collect the temperature of the battery protection board and the temperature of the processor of the central processing unit, and determine the gain temperature of the battery core temperature by the temperature of the battery protection board and the temperature of the processor based on preset gain parameters; the correction sub-circuit is configured to determine a target detection temperature of the battery based on a preset correction parameter, which is determined by an inverting adjustment resistance of an adder in the correction sub-circuit, based on the gain temperature and the cell acquisition temperature. The present disclosure improves the accuracy and precision of battery temperature detection.
Description
The disclosure relates to the technical field of battery temperature detection, in particular to a battery temperature detection circuit, a battery temperature detection method, a battery protection plate, a battery and a mobile terminal.
The battery is a key component of normal operation of electronic equipment, the service life of the battery is influenced, the safe use of the electronic equipment is influenced, the equipment is possibly scalded due to the fact that the temperature of the battery is too high, the use is influenced, other components and parts can be enabled to work at abnormal temperature, and the equipment is possibly failed or even explodes.
In related scenes, the lead type thermistor is attached to the surface of the battery core to collect the temperature of the battery core, so that the mode not only limits the layout of the protection plate, but also has higher requirements on the position of the thermistor, and if the attaching position of the thermistor is deviated, the collected temperature can be greatly deviated. Or, the chip thermistor is attached to the protection plate, and the CPU fits to obtain the battery temperature according to the temperature of the protection plate collected by the thermistor and the equipment temperature collected by the CPU.
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a battery temperature detection circuit, a battery temperature detection method, a battery protection plate, a battery and a mobile terminal.
According to a first aspect of embodiments of the present disclosure, there is provided a battery temperature detection circuit including:
the battery cell temperature acquisition sub-circuit and the gain sub-circuit are connected with the correction sub-circuit;
the battery cell temperature acquisition sub-circuit is configured to acquire battery cell temperatures of a plurality of different parts of a battery cell of the battery, and determine battery cell acquisition temperatures according to the plurality of battery cell temperatures;
the gain subcircuit is configured to collect the temperature of the battery protection board and the temperature of the processor of the central processing unit, and determine the temperature of the protection board and the gain temperature of the processor to the temperature of the battery core based on preset gain parameters;
the correction sub-circuit is configured to determine a target detection temperature of the battery based on a preset correction parameter, which is determined by an inverting adjustment resistance of an adder in the correction sub-circuit, according to the gain temperature and the cell acquisition temperature.
Optionally, the gain sub-circuit comprises a protection board temperature acquisition sub-circuit, a processor temperature acquisition sub-circuit and a gain calculation sub-circuit;
the protection plate temperature acquisition sub-circuit is configured to acquire the protection plate temperature of the battery protection plate and determine the protection plate gain temperature of the protection plate temperature to the battery core temperature based on preset protection plate gain sub-parameters;
The processor temperature acquisition sub-circuit is configured to acquire the processor temperature of the central processing unit and determine the processor gain temperature of the processor temperature versus the battery cell temperature based on a preset processor gain sub-parameter;
the gain calculation sub-circuit is configured to determine the protection board gain temperature and the gain temperature of the processor gain temperature to the cell temperature based on a preset gain adjustment sub-parameter;
the gain parameters include the protection board gain subparameter, the processor gain subparameter, and the gain adjustment subparameter.
Optionally, an inverting access terminal of the adder in the battery cell temperature acquisition sub-circuit is provided with an inverting adjusting resistor;
the cell temperature acquisition sub-circuit is configured to determine a cell acquisition temperature from a plurality of the cell temperatures based on a cell temperature parameter determined by an inverse adjustment resistance of an adder in the cell temperature acquisition sub-circuit.
Optionally, the battery cell temperature acquisition sub-circuit is configured to acquire a first battery cell temperature of the battery cell through a thermistor disposed on a first face of the battery protection plate, and acquire a second battery cell temperature of the battery cell through a thermistor disposed on a second face of the battery protection plate;
The first surface and the second surface are protection plate surfaces which are oppositely arranged.
Optionally, the preset correction parameter is determined by an inverting adjustment resistance of an adder in the correction sub-circuit;
the correction subcircuit is configured to:
performing gain removal on the battery cell acquisition temperature according to the gain temperature to obtain a gain-removed battery cell acquisition temperature; and is combined with the other components of the water treatment device,
and determining the target detection temperature of the battery according to the preset correction parameters and the gain-removed battery core acquisition temperature.
According to a second aspect of embodiments of the present disclosure, there is provided a battery temperature detection method applied to a battery protection board including the battery temperature detection circuit of the first aspect, the method including:
collecting the temperature of a protection plate of the battery protection plate, the temperature of a processor of a central processing unit and the temperature of a plurality of different parts of battery cores of the battery;
determining a battery cell acquisition temperature according to a plurality of battery cell temperatures, and determining the protection plate temperature and the gain temperature of the processor temperature to the battery cell temperature based on a preset gain parameter;
and determining the target detection temperature of the battery according to the gain temperature and the battery cell acquisition temperature based on a preset correction parameter, wherein the correction parameter is determined by an inverting adjustment resistor of an adder in a correction sub-circuit.
Optionally, the gain parameters include a protection board gain subparameter, a processor gain subparameter, and a gain adjustment subparameter, and determining the protection board temperature and the gain temperature of the processor temperature to the cell temperature based on a preset gain parameter includes:
determining the gain temperature of the protection board from the temperature of the protection board to the temperature of the battery cell based on the gain subparameter of the protection board;
determining a processor gain temperature of the processor temperature versus the cell temperature based on the processor gain subparameter;
and determining the gain temperature of the protection board and the gain temperature of the processor to the gain temperature of the battery cell based on the gain adjustment subparameter.
Optionally, the determining the cell collection temperature according to the cell temperatures includes:
and determining the battery cell acquisition temperature according to a plurality of battery cell temperatures based on the battery cell temperature parameters, wherein the battery cell temperature parameters are determined by the reversed phase adjusting resistance of the adder in the battery cell temperature acquisition sub-circuit.
Optionally, the cell temperature parameter, the protection board gain subparameter, the processor gain subparameter, the gain adjustment subparameter, and the correction parameter are determined by:
Standing the battery cell for a preset period of time, and after the standing is finished, collecting the temperature of a standing protection board of the battery protection board, the temperature of a standing processor of the central processing unit, the temperature of the standing battery cell of a plurality of different parts of the battery cell and the temperature of a standing battery outputted by the battery temperature detection circuit;
under the condition that the battery cell is charged by the maximum charging current, collecting the temperature of a charging protection plate of the battery protection plate, the temperature of a charging processor of the central processing unit, the temperature of the charging battery cells at a plurality of different parts of the battery cell and the temperature of the charging battery output by the battery temperature detection circuit;
discharging the battery cells under a plurality of preset temperature conditions by using preset discharge current, collecting the discharge protection plate temperature of the battery protection plate, the discharge processor temperature of the central processing unit, the discharge battery cell temperatures of a plurality of different parts of the battery cells and obtaining the discharge battery temperature output by the battery temperature detection circuit;
based on a preset calculation formula, determining an initial fitting equation according to the rest battery temperature, the rest protection plate temperature, the rest processor temperature and the rest battery core temperatures;
Based on the calculation formula, determining a charging fitting equation according to the rechargeable battery temperature, the charging protection plate temperature, the charging processor temperature and the plurality of charging battery core temperatures;
based on the calculation formula, respectively determining a plurality of discharge fitting equations according to the discharge battery temperature, the discharge protection plate temperature, the discharge processor temperature and the discharge cell temperatures under a plurality of preset temperature conditions;
and according to the charge fitting equation and the plurality of discharge fitting equations, fitting and calculating to obtain the battery cell temperature parameter, the protection plate gain subparameter, the processor gain subparameter, the gain adjustment subparameter and the correction parameter.
Optionally, the determining, based on the preset correction parameter, the target detection temperature of the battery according to the gain temperature and the battery cell acquisition temperature includes:
performing gain removal on the battery cell acquisition temperature according to the gain temperature to obtain a gain-removed battery cell acquisition temperature;
and determining the target detection temperature of the battery according to the preset correction parameters and the gain-removed battery core acquisition temperature.
According to a third aspect of the embodiments of the present disclosure, there is provided a battery protection plate including: the battery temperature detection circuit of any one of the first aspects.
Optionally, the battery protection plate further includes:
a power supply circuit configured to convert a voltage of power supplied from a battery cell into a voltage required by the battery temperature detection circuit, and supply the converted power to the battery temperature detection circuit as operating power;
and an electricity meter configured to convert the voltage-type target detection temperature output from the battery temperature detection circuit into a digital-type target detection temperature.
According to a fourth aspect of embodiments of the present disclosure, there is provided a battery comprising: the battery protection plate according to the third aspect.
According to a fifth aspect of embodiments of the present disclosure, there is provided a mobile terminal, comprising: the battery according to the fourth aspect.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
acquiring the cell temperatures of a plurality of different parts of a cell of the battery through a cell temperature acquisition sub-circuit, and determining the cell acquisition temperature according to the cell temperatures; the gain sub-circuit collects the temperature of a battery protection plate and the temperature of a processor of a central processing unit, and determines the temperature of the battery protection plate and the gain temperature of the processor to the temperature of the battery core based on preset gain parameters; the correction sub-circuit is used for determining the target detection temperature of the battery according to the gain temperature and the battery cell acquisition temperature based on preset correction parameters, and the correction parameters are determined by the reversed phase adjusting resistance of the adder in the correction sub-circuit. The battery temperature detection device has the advantages that the target detection temperature of the battery can be determined according to the battery core temperatures of a plurality of different parts, the temperature inconsistency of the battery core at different parts is avoided, the temperature estimation error is caused, the reliability and the accuracy of battery temperature detection are improved compared with the case that the battery core temperature is acquired at a single part, the temperature of two interference sources with the maximum battery temperature acquisition is removed, the influence of the heating of the protection plate and the heating of the central processing unit on the battery temperature is reduced, and the accuracy of battery temperature detection is further improved.
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 circuit diagram illustrating a battery temperature detection circuit according to an exemplary embodiment.
Fig. 2 is an overall schematic diagram illustrating a battery temperature detection according to an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating a packaged battery temperature detection circuit according to an exemplary embodiment.
Fig. 4 is a flowchart illustrating a battery temperature detection method according to an exemplary embodiment.
Fig. 5 is a circuit diagram of a power supply circuit according to an exemplary embodiment.
Fig. 6 is a schematic diagram of an electricity meter according to an example embodiment.
Fig. 7 is a block diagram illustrating an apparatus applying a battery temperature detection method 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. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
It should be noted that, all actions for acquiring signals, information or data in the present application are performed under the condition of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.
In the related art, the lead type thermistor is attached to the battery core, so that the interference of heating of the protective plate and heating of the CPU to the temperature of the collected battery core can be reduced as much as possible, the temperature accuracy of the collected battery core is higher, the temperature of the battery can be accurately determined, but the operation in the production process of electronic equipment is more troublesome, the accuracy requirement on the attaching position of the lead type thermistor is high, and the production efficiency is influenced. And through pasting the SMD thermistor of establishing on the protection shield, though easy operation in the production process, the temperature of gathering receives the influence that the protection shield generates heat and CPU generates heat, leads to the temperature accuracy of gathering lower to through the CPU fit, increased the system operation burden.
Therefore, the battery temperature detection method can reduce the influence of heating of other components of the equipment on battery temperature acquisition, improve the accuracy of acquired battery temperature and reduce the operation load of a system.
Fig. 1 is a circuit diagram of a battery temperature detection circuit, which may be applied to a battery PCM (Protection circuit module ) board, hereinafter referred to as a battery protection board, which may be applied to a battery, which may be applied to a mobile terminal such as a mobile phone, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, a wearable device, a PC (Personal Computer, a personal computer), and the like, according to an exemplary embodiment.
As shown in fig. 1, the battery temperature detection circuit 100 includes: the correction sub-circuit 101, the cell temperature acquisition sub-circuit 102 and the gain sub-circuit 103 are all connected with the correction sub-circuit 101.
The cell temperature acquisition sub-circuit 102 is configured to acquire cell temperatures of a plurality of different portions of a cell of the battery, and determine a cell acquisition temperature from the plurality of cell temperatures.
In one embodiment, the plurality of different locations may be cell locations with different amounts of heat generated on the battery. For example, the temperature of the battery core may be obtained by disposing a thermistor at a battery core position where the amount of heat generated is different on the battery.
Taking a mobile phone as an example for illustration, the plurality of different parts may be a front side of the battery and a back side of the battery, wherein the front side of the battery is a side of the battery close to a display screen of the mobile terminal, and the back side of the battery is a side of the battery close to a back shell of the mobile terminal. The heating value of the front side of the battery is different from the heating value of the back side of the battery, so that the inconsistent heating value of the front side and the back side of the battery can be avoided, and the temperature detection error caused by the inconsistent heating value of the front side and the back side of the battery is improved in reliability and accuracy of battery temperature detection compared with the temperature of a single part of the collected current core.
As yet another example, the plurality of different locations may be a battery end portion, which refers to one end of the battery that is charged and discharged, and a battery tail portion, which refers to the other end of the battery that is opposite the charged and discharged end. Because the heating value of the end part of the battery which is used as one end for charging and discharging is higher than that of the tail part of the battery, the temperature detection error caused by inconsistent heating values of different parts of the battery can be avoided.
The gain subcircuit 103 is configured to collect a protection plate temperature of a battery protection plate and a processor temperature of a central processing unit, and determine a gain temperature of the protection plate temperature and the processor temperature to the battery cell temperature based on a preset gain parameter.
In the embodiment of the disclosure, the influence of the heat generation of the heat generating device of the protection plate on the detection of the temperature of the battery cell is large, so that the temperature of the heat generating device of the protection plate can be used as the temperature of the protection plate, for example, a thermistor can be configured on the heat generating device of the protection plate, and the temperature of the heat generating device of the protection plate can be acquired through the thermistor, so that the temperature of the protection plate can be obtained. The heating device on the battery protection board can comprise a MOS tube, a precision resistor and the like.
Similarly, the heat generated by the CPU has a larger influence on the detection of the temperature of the battery cell, so that the temperature of the CPU can be acquired by configuring a thermistor on the CPU, thereby obtaining the temperature of the CPU.
The correction sub-circuit 101 is configured to determine a target detection temperature of the battery according to the gain temperature and the cell acquisition temperature based on a preset correction parameter, the preset correction parameter being determined by an inverting adjustment resistance of an adder in the correction sub-circuit.
The voltages at the two ends of the thermistor NTC can be used for representing the acquired temperature, so that the voltage type target detection temperature can be directly obtained.
In the embodiment of the present disclosure, referring to fig. 1 and 2, the temperatures of the corresponding components may be collected by thermistors provided at the respective positions. For example, the temperature of the battery cells at different positions is respectively collected through a thermistor NTC1 and a thermistor NTC2 which are arranged on the protection plate and far away from the heating device of the protection plate; collecting the temperature of a protective plate of the battery protective plate through a thermistor NTC3 arranged on a heating device of the protective plate; the processor temperature of the central processor is acquired by a thermistor NTC4 provided on the central processor.
Referring to fig. 3, in the case where components of the battery temperature detection circuit other than the thermistors are packaged together to obtain an operation module, for example, in the case where the battery cell temperature acquisition sub-circuit includes two thermistors NTC1 and NTC2, the operation module is connected to the thermistors NTC1 to NTC4, respectively.
Further, since the gain degrees of the protection plate temperature and the processor temperature on the cell collection temperature are different, the overall gain (gain temperature) of the protection plate temperature and the processor temperature on the cell collection temperature can be determined by setting corresponding gain parameters.
Further, the gain temperature and the cell acquisition temperature are attenuated and have interference, so attenuation and interference need to be removed through preset correction parameters, and a final target detection temperature is obtained.
The circuit collects the cell temperatures of a plurality of different parts of the cell of the battery through a cell temperature collection sub-circuit, and determines the cell collection temperature according to the cell temperatures; the gain sub-circuit collects the temperature of a battery protection plate and the temperature of a processor of a central processing unit, and determines the temperature of the battery protection plate and the gain temperature of the processor to the temperature of the battery core based on preset gain parameters; the correction sub-circuit is used for determining the target detection temperature of the battery according to the gain temperature and the battery cell acquisition temperature based on preset correction parameters, and the correction parameters are determined by the reversed phase adjusting resistance of the adder in the correction sub-circuit. The battery temperature detection device has the advantages that the target detection temperature of the battery can be determined according to the battery core temperatures of a plurality of different parts, the temperature inconsistency of the battery core at the different parts is avoided, the temperature estimation error is caused, the reliability and the accuracy of the battery temperature detection are improved compared with the case that the battery core temperature is acquired at a single part, the temperatures of two interference sources with the maximum battery temperature acquisition are removed, the influence of the heating of the protection plate and the heating of the central processing unit on the battery temperature is reduced, and the accuracy of the battery temperature detection is further improved.
In one embodiment, referring to FIG. 1, the gain subcircuit 103 includes a protection plate temperature acquisition subcircuit 1031, a processor temperature acquisition subcircuit 1032, and a gain calculation subcircuit 1033;
the protection board temperature acquisition sub-circuit 1031 is configured to acquire a protection board temperature of the battery protection board, and determine a protection board gain temperature of the protection board temperature to the battery cell temperature based on a preset protection board gain sub-parameter.
In the embodiment of the disclosure, as shown in fig. 1, the protection board temperature acquisition sub-circuit 1031 includes an adder U2, a resistor R8 and a resistor R12, both of which have first ends connected to a positive-phase access end of the adder U2, a resistor R5 and a thermistor NTC3, both of which have first ends connected to a second end of the resistor R8, and a resistor R6 and a resistor R14, both of which have first ends connected to an inverting access end of the adder U2.
The second end of the thermistor NTC3 is grounded, the second end of the resistor R5 is connected to a power supply, the second end of the resistor R6 and the second end of the resistor R12 are both grounded, and the second end of the resistor R14 is connected to the output end of the adder U2. When the electronic device is set in a factory, resistors R8 and R12 with different resistance values are configured, and the gain subparameter of the protection board can be determined.
The resistors R6 and R14 with different resistance values can be configured to reduce drift caused by different temperatures.
During driving, the protection board temperature acquisition sub-circuit 1031 acquires the protection board temperature of the heating device of the protection board based on the power transmitted through the resistor R5, and calculates the product of the protection board temperature and the protection board gain sub-parameter to obtain the protection board gain temperature.
The processor temperature acquisition sub-circuit 1032 is configured to acquire a processor temperature of the central processor and to determine a processor gain temperature of the processor temperature versus the cell temperature based on a preset processor gain sub-parameter.
As shown in fig. 1, the processor temperature acquisition sub-circuit 1032 includes an adder U3, a resistor R9 and a resistor R10, both of which have first ends connected to a positive access terminal of the adder U3, a resistor R7 and a thermistor NTC4, both of which have first ends connected to a second end of the resistor R9, and a resistor R11 and a resistor R13, both of which have first ends connected to an inverting access terminal of the adder U2.
The second end of the resistor R7 is connected to the power supply, the second end of the resistor R11, the second end of the resistor R10 and the second end of the thermistor NTC4 are all grounded, and the second end of the resistor R13 is connected to the output end of the adder U3. Similarly, when the processor is set in a factory, resistors R9 and R10 with different resistance values are configured, and the magnitude of the gain subparameter of the processor can be determined.
The resistors R11 and R13 with different resistance values can be configured to reduce drift caused by different temperatures.
In the driving process, the processor temperature acquisition sub-circuit 1032 acquires the processor temperature of the central processing unit CPU based on the power transmitted through the resistor R7, and calculates the product of the processor temperature and the processor gain sub-parameter to obtain the processor gain temperature.
The gain calculation sub-circuit 1033 is configured to determine the protection board gain temperature and a gain temperature of the processor gain temperature versus the cell temperature based on a preset gain adjustment sub-parameter;
the gain parameters include the protection board gain subparameter, the processor gain subparameter, and the gain adjustment subparameter.
With continued reference to fig. 1, gain calculation sub-circuit 1033 includes an adder U4, a resistor R15 and a resistor R16 each having a first end connected to a positive access terminal of adder U4, and a resistor R17 and a resistor R18 each having a first end connected to an inverted access terminal of adder U4.
The second end of the resistor R15 is connected to the output end of the protection board temperature acquisition sub-circuit 1031, the second end of the resistor R16 is connected to the output end of the processor temperature acquisition sub-circuit 1032, the positive access end of the adder U4 and the second end of the resistor R17 are both grounded, and the second end of the resistor R18 is connected to the output end of the adder U4.
In the driving process, the gain calculation sub-circuit 1033 receives the temperature signals output by the protection board temperature acquisition sub-circuit 1031 and the processor temperature acquisition sub-circuit 1032, calculates a gain temperature sum of the processor gain temperature and the protection board temperature, and calculates a product of the gain adjustment sub-parameter and the gain temperature sum to obtain a final gain temperature.
According to the technical scheme, in the battery temperature detection process, the gain of the heating device of the protection board to the battery temperature and the gain of the processor to the battery temperature are calculated through the protection board gain subparameter and the processor gain subparameter respectively, the influence of two maximum heating interference sources in the mobile terminal to the battery temperature detection is eliminated, and therefore the accuracy of the battery temperature detection is improved.
In one embodiment, referring to fig. 1, the inverting input of the adder is configured with an inverting regulator resistor in the cell temperature acquisition sub-circuit 102.
In the embodiment of the disclosure, the inverting access terminal of the adder in the battery cell temperature acquisition sub-circuit 102 is configured with the inverting adjustment resistors R19 and R20, and when the battery cell temperature acquisition sub-circuit is set in a factory, the magnitude of the battery cell temperature parameter can be determined by configuring the inverting adjustment resistors R19 and R20 with different resistance values.
The cell temperature acquisition sub-circuit 102 is configured to determine a cell acquisition temperature from a plurality of the cell temperatures based on a cell temperature parameter determined by an inverse adjustment resistance of an adder in the cell temperature acquisition sub-circuit.
In this disclosure embodiment, as shown in fig. 1, the battery cell temperature acquisition sub-circuit 102 includes an adder U1, a resistor R2 with a first end connected to a positive access end of the adder U1, a resistor R1 and a thermistor NTC1 with a first end connected to a second end of the resistor R2, a resistor R4 with a first end connected to a positive access end of the adder U1, a resistor R3 and a thermistor NTC2 with a first end connected to a second end of the resistor R4, and opposite phase adjusting resistors R19 and R20 with a first end connected to an opposite phase access end of the adder U1.
The second end of the resistor R1 is connected with a power supply, the second end of the thermistor NTC1 is grounded, the second end of the resistor R3 is connected with a power supply, and the second end of the thermistor NTC2 is grounded. The second end of the reverse phase adjusting resistor R19 is grounded, the second end of the reverse phase adjusting resistor R20 is connected with the output end of the adder U1, and the positive phase of the adder U1 is connected with the ground.
In the driving process, the battery cell temperature acquisition sub-circuit 102 acquires the battery cell temperature of the battery through the thermistor NTC1 and the thermistor NTC2 based on the electric power transmitted through the resistor R1 and the resistor R3 respectively, calculates the sum of the battery cell temperature through the addition operation of the adder U1, and calculates the product of the sum of the battery cell temperature and the battery cell temperature parameter to obtain the battery cell acquisition temperature.
Optionally, the battery cell temperature acquisition sub-circuit is configured to acquire a first battery cell temperature of the battery cell through a thermistor disposed on a first face of the battery protection plate, and acquire a second battery cell temperature of the battery cell through a thermistor disposed on a second face of the battery protection plate;
the first surface and the second surface are protection plate surfaces which are oppositely arranged.
In the embodiment of the disclosure, the number of the thermistors arranged on the first surface of the battery protection plate may be one or more, and the number of the thermistors arranged on the second surface of the battery protection plate may be one or more. When the number of thermistors provided at the same location is plural, the average value of the plurality of acquired cell temperatures may be used as the final cell temperature.
In one embodiment, the preset correction parameter is determined by an inverting regulator resistance of an adder in the correction sub-circuit 101;
the correction subcircuit is configured to:
performing gain removal on the battery cell acquisition temperature according to the gain temperature to obtain a gain-removed battery cell acquisition temperature; and is combined with the other components of the water treatment device,
and determining the target detection temperature of the battery according to the preset correction parameters and the gain-removed battery core acquisition temperature.
With continued reference to fig. 1, the correction sub-circuit 101 includes an adder U5, a resistor R21 and a resistor R22 each having a first end connected to a non-inverting input terminal of the adder U5, and an inverting adjustment resistor R23 and an inverting adjustment resistor R24 each having a first end connected to an inverting input terminal of the adder U5. When the factory is set, the reverse phase adjusting resistor R23 and the reverse phase adjusting resistor R24 with different resistance values are configured, and the size of the correction parameter can be determined.
The second end of the resistor R21 is connected to the output end of the battery core temperature acquisition sub-circuit 102, the second end of the inverting adjustment resistor R23 is connected to the output end of the gain sub-circuit 103, the second end of the inverting adjustment resistor R24 is connected to the output end of the adder U5, and the second end of the resistor R22 is grounded.
In the driving process, the correction sub-circuit 101 receives temperature signals of the gain sub-circuit 103 and the cell temperature acquisition sub-circuit 102, calculates a difference between the cell acquisition temperature and the gain temperature, and calculates a product of a preset correction parameter and the difference to obtain a target detection temperature of the battery.
In the embodiment of the present disclosure, the target detection temperature V may be calculated by the following formula:
V＝d×[a×(V1+V2+...Vn)/n-e×(b×V3+c×V4)] (1)
wherein d is a preset correction parameter, a is a battery core temperature parameter, b is a protection board gain subparameter, c is a processor gain subparameter, and e is a gain adjustment subparameter, wherein e can be 1 in some optional embodiments. V1, V2 to Vn are the cell temperatures of a plurality of different parts respectively, n is the number of the cell temperatures, for example, in some embodiments, only the cell temperatures of the front side and the back side of the battery are collected, the value of n is 2, the cell temperatures only comprise V1 and V2, V3 is the temperature of the protection board, and V4 is the temperature of the processor.
The target detection temperature V is a voltage-type target detection temperature.
Fig. 4 is a flowchart illustrating a battery temperature detection method according to an exemplary embodiment, which may be applied to a battery protection board including the aforementioned battery temperature detection circuit, as shown in fig. 4, the method including the following steps.
In step S41, collecting the temperature of the battery protection plate and the temperature of the processor of the central processing unit, and collecting the temperatures of the battery cells at a plurality of different positions of the battery cells;
in step S42, determining a cell acquisition temperature according to a plurality of the cell temperatures, and determining a gain temperature of the protection board temperature and the processor temperature to the cell temperature based on a preset gain parameter;
in step S43, a target detection temperature of the battery is determined according to the gain temperature and the cell acquisition temperature based on a preset correction parameter, where the correction parameter is determined by an inverting adjustment resistance of an adder in a correction sub-circuit.
Optionally, the gain parameters include a protection board gain subparameter, a processor gain subparameter, and a gain adjustment subparameter, and in step S42, determining the protection board temperature and the gain temperature of the processor temperature to the battery cell temperature based on the preset gain parameters includes:
Determining the gain temperature of the protection board from the temperature of the protection board to the temperature of the battery cell based on the gain subparameter of the protection board;
determining a processor gain temperature of the processor temperature versus the cell temperature based on the processor gain subparameter;
and determining the gain temperature of the protection board and the gain temperature of the processor to the gain temperature of the battery cell based on the gain adjustment subparameter.
Optionally, in step S42, the determining a cell acquisition temperature according to a plurality of cell temperatures includes:
and determining the battery cell acquisition temperature according to a plurality of battery cell temperatures based on the battery cell temperature parameters, wherein the battery cell temperature parameters are determined by the reversed phase adjusting resistance of the adder in the battery cell temperature acquisition sub-circuit.
Optionally, the cell temperature parameter, the protection board gain subparameter, the processor gain subparameter, the gain adjustment subparameter, and the correction parameter are determined by:
under the condition that the battery cell is charged by the maximum charging current, collecting the temperature of a charging protection plate of the battery protection plate, the temperature of a charging processor of the central processing unit, the temperature of the charging battery cells at a plurality of different parts of the battery cell and the temperature of the charging battery output by the battery temperature detection circuit;
Discharging the battery cells under a plurality of preset temperature conditions by using preset discharge current, collecting the discharge protection plate temperature of the battery protection plate, the discharge processor temperature of the central processing unit, the discharge battery cell temperatures of a plurality of different parts of the battery cells and obtaining the discharge battery temperature output by the battery temperature detection circuit;
based on a preset calculation formula, determining a charging fitting equation according to the temperature of the rechargeable battery, the temperature of the charging protection plate, the temperature of the charging processor and the temperatures of a plurality of charging cells;
based on the calculation formula, respectively determining a plurality of discharge fitting equations according to the discharge battery temperature, the discharge protection plate temperature, the discharge processor temperature and the discharge cell temperatures under a plurality of preset temperature conditions;
and according to the charge fitting equation and the plurality of discharge fitting equations, fitting and calculating to obtain the battery cell temperature parameter, the protection plate gain subparameter, the processor gain subparameter, the gain adjustment subparameter and the correction parameter.
In some optional embodiments of the present disclosure, first, the battery is left standing at room temperature (25 ℃) for a preset period of time, and the temperature of the battery, the temperature of the protection board and the temperature of the processor are respectively collected by the thermistors arranged on the battery, the protection board and the central processor, and the temperature of the battery at rest is determined and output at the current temperature of the battery temperature detection circuit, and then substituted into the formula (1), so as to obtain an initial fitting equation.
Further, under the condition of room temperature (25 ℃), the battery cell is charged with the maximum charging current, and the temperature of the protection plate, the temperature of the charging processor and the temperatures of a plurality of charging battery cells are charged through the thermistor, and the temperature of the charging battery outputted by the battery temperature detection circuit is obtained and substituted into the formula (1) to obtain a charging fitting equation.
Further, under the condition of room temperature (25 ℃), the battery cell is discharged with a preset discharge current of 2.5A and a constant current, the discharge protection plate temperature of the battery protection plate, the discharge processor temperature of the central processing unit, the discharge battery cell temperatures of a plurality of different parts of the battery cell and the discharge battery temperature output by the battery temperature detection circuit are collected, and the first discharge fitting equation is obtained by substituting the preset discharge current into the formula (1).
Further, under the condition of-15 ℃, the battery cell is discharged by a preset discharge current of 2.5A and a constant current, the discharge protection plate temperature of the battery protection plate, the discharge processor temperature of the central processing unit, the discharge battery cell temperatures of a plurality of different parts of the battery cell and the discharge battery temperature output by the battery temperature detection circuit are collected, and the second discharge fitting equation is obtained by substituting the discharge protection plate temperature, the discharge processor temperature of the central processing unit and the discharge battery cell temperatures into the formula (1).
Further, under the condition of 45 ℃, the battery cell is discharged by a preset discharge current of 2.5A and a constant current, the discharge protection plate temperature of the battery protection plate, the discharge processor temperature of the central processing unit, the discharge battery cell temperatures of a plurality of different parts of the battery cell and the discharge battery temperature output by the battery temperature detection circuit are collected, and the third discharge fitting equation is obtained by substituting the discharge protection plate temperature, the discharge processor temperature of the central processing unit and the discharge battery cell temperatures into the formula (1).
Further, according to an initial fitting equation, a charging fitting equation, a first discharging fitting equation, a second discharging fitting equation and a third discharging fitting equation, fitting calculation is performed to obtain the battery cell temperature parameter, the protection plate gain subparameter, the processor gain subparameter, the gain adjustment subparameter and the correction parameter.
Optionally, in step S43, the determining, based on the preset correction parameter, the target detection temperature of the battery according to the gain temperature and the battery cell acquisition temperature includes:
performing gain removal on the battery cell acquisition temperature according to the gain temperature to obtain a gain-removed battery cell acquisition temperature;
and determining the target detection temperature of the battery according to the preset correction parameters and the gain-removed battery core acquisition temperature.
The embodiment of the present disclosure further provides a battery protection plate, as shown in fig. 2, including:
the battery temperature detection circuit 100 according to any one of the foregoing embodiments.
Optionally, the battery protection plate further includes: a power supply circuit 200 and an electricity meter 300 each connected to the battery temperature detection circuit 100;
the power supply circuit 200 is configured to convert a voltage of power supplied from a battery cell into a voltage required by the battery temperature detection circuit 100, and supply the converted power to the battery temperature detection circuit 100 as operating power;
the fuel gauge 300 is configured to convert the voltage type target detection temperature outputted from the battery temperature detection circuit 100 into a digital target detection temperature.
In the embodiment of the disclosure, the electricity meter 300 may convert the voltage representing the target detection temperature into the battery cell temperature and transmit the temperature to the motherboard through the integrated circuit bus IIC, so that the voltage Vi at two ends of the thermistor NTC may be collected by the operation module and transmitted to the electricity meter 300 after being operated, and the electricity meter 300 converts the voltage representing the target detection temperature into the battery cell temperature T and transmits the battery cell temperature T to the motherboard, thereby reducing the burden of the central processing unit CPU.
Wherein the electricity meter 300 may be connected to the power supply circuit 200 to supply operating power to the electricity meter 300 through the power supply circuit 200, and the electricity meter 300 may be directly connected to a battery to directly supply operating power to the electricity meter 300 through the battery.
In the embodiment of the present disclosure, the power supply circuit 200 boosts the power of 4.2V supplied from the battery to 5V and supplies the boosted power to the battery temperature detection circuit 100.
In the embodiment of the present disclosure, referring to fig. 5, the chip in the power supply circuit 200 may be PW5300. The voltage input terminal VIN of the chip PW5300 is connected to the positive electrode of the battery, the ground of the chip PW5300 is grounded, the enable terminal EN of the chip PW5300 is connected to the voltage output terminal LX of the chip PW5300 through a resistor L1, the voltage output terminal LX is connected to a battery temperature detection circuit through a diode D2, the voltage output terminal LX is connected to the anode of the diode D2, the battery temperature detection circuit is connected to the cathode of the diode D2, and the cathode of the diode D2 is grounded through two parallel capacitors C3 and C4.
The current limiting terminal OCP of the chip PW5300 is grounded through a resistor R101, the voltage input terminal VIN of the chip PW5300 is grounded through two parallel capacitors C1 and C2, the current feedback terminal FB of the chip PW5300 is connected to the cathode of the diode D2 through a resistor R102, and the current feedback terminal FB of the chip PW5300 is grounded through a resistor R103. Thereby supplying the boosted voltage of 5V to the battery temperature detection circuit.
Referring to fig. 6, vbat+ and GND of the chip of the fuel gauge 300 are respectively connected to the positive and negative electrodes of the battery, pin TH of the chip is connected to the output terminal TS of the battery temperature detection circuit, and pin SCL and pin SDA of the chip are respectively connected to the motherboard. The fuel gauge 300 may protect the battery cell from charge and discharge, or may convert the voltage-type target detection temperature output from the battery temperature detection circuit into a digital-type target detection temperature.
In this way, the power supply circuit 200 can supply power to the battery temperature detection circuit 100, and the power supply voltage is stable and reliable, and compared with the direct power supply by using the battery core, the influence of voltage rise and fall on the measurement accuracy during battery charging and discharging can be reduced, thereby improving the measurement accuracy.
Compared with the lead-type thermistor, the technical scheme has the advantages that the chip temperature of a plurality of parts of the chip is acquired by adopting the plurality of patch-type thermistors, the circuit layout is diversified, and the battery temperature can be detected by changing coefficients in corresponding formulas according to different layouts. In the production process, the PCM (Protection Circuit Module ) board production steps of the patch type thermistor are obviously less than those of the lead type NTC, so that the cost is saved. And after the operation module is packaged, the operation is more stable, the speed is faster, the precision is higher, and the anti-interference capability is strong.
The embodiment of the disclosure also provides a battery, including: the battery protection plate according to any one of the foregoing embodiments.
The battery provided by the embodiment of the disclosure further comprises a battery core, and the battery core is electrically connected with the battery protection plate.
The embodiment of the disclosure also provides a mobile terminal, which comprises the battery in any embodiment.
Alternatively, the mobile terminal may be a mobile phone, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, a wearable device, a PC (Personal Computer, a personal computer), or the like.
Fig. 7 is a block diagram illustrating an apparatus 700 for applying a battery temperature detection method according to an exemplary embodiment. For example, the apparatus 700 may be a mobile terminal such as 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. 7, an apparatus 700 may include one or more of the following components: a processing component 702, a memory 704, a power component 706, a multimedia component 708, an audio component 710, an input/output interface 712, a sensor component 714, and a communication component 716.
The processing component 702 generally controls overall operation of the apparatus 700, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 702 may include one or more processors 720 to execute instructions to perform all or part of the steps of the battery temperature detection method described above. Further, the processing component 702 can include one or more modules that facilitate interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.
The memory 704 is configured to store various types of data to support operations at the apparatus 700. Examples of such data include instructions for any application or method operating on the apparatus 700, contact data, phonebook data, messages, pictures, videos, and the like. The memory 704 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 706 provides power to the various components of the device 700. Power component 706 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for device 700.
The multimedia component 708 includes a screen between the device 700 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 708 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the apparatus 700 is in an operational 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 710 is configured to output and/or input audio signals. For example, the audio component 710 includes a Microphone (MIC) configured to receive external audio signals when the device 700 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 704 or transmitted via the communication component 716. In some embodiments, the audio component 710 further includes a speaker for outputting audio signals.
The input/output interface 712 provides an interface between the processing component 702 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 714 includes one or more sensors for providing status assessment of various aspects of the apparatus 700. For example, the sensor assembly 714 may detect an on/off state of the device 700, a relative positioning of the components, such as a display and keypad of the device 700, a change in position of the device 700 or a component of the device 700, the presence or absence of user contact with the device 700, an orientation or acceleration/deceleration of the device 700, and a change in temperature of the device 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 714 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 714 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 716 is configured to facilitate communication between the apparatus 700 and other devices in a wired or wireless manner. The apparatus 700 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 716 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 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 700 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 performing the battery temperature detection methods described above.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 704, including instructions executable by processor 720 of apparatus 700 to perform the above-described battery temperature detection 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.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. 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 intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
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 appended claims.
Claims (14)
- A battery temperature detection circuit, characterized by comprising:the battery cell temperature acquisition sub-circuit and the gain sub-circuit are connected with the correction sub-circuit;the battery cell temperature acquisition sub-circuit is configured to acquire battery cell temperatures of a plurality of different parts of a battery cell of the battery, and determine battery cell acquisition temperatures according to the plurality of battery cell temperatures;The gain subcircuit is configured to collect the temperature of the battery protection board and the temperature of the processor of the central processing unit, and determine the temperature of the protection board and the gain temperature of the processor to the temperature of the battery core based on preset gain parameters;the correction sub-circuit is configured to determine a target detection temperature of the battery based on a preset correction parameter, which is determined by an inverting adjustment resistance of an adder in the correction sub-circuit, according to the gain temperature and the cell acquisition temperature.
- The circuit of claim 1, wherein the gain subcircuit comprises a protection board temperature acquisition subcircuit, a processor temperature acquisition subcircuit, and a gain calculation subcircuit;the protection plate temperature acquisition sub-circuit is configured to acquire the protection plate temperature of the battery protection plate and determine the protection plate gain temperature of the protection plate temperature to the battery core temperature based on preset protection plate gain sub-parameters;the processor temperature acquisition sub-circuit is configured to acquire the processor temperature of the central processing unit and determine the processor gain temperature of the processor temperature versus the battery cell temperature based on a preset processor gain sub-parameter;The gain calculation sub-circuit is configured to determine the protection board gain temperature and the gain temperature of the processor gain temperature to the cell temperature based on a preset gain adjustment sub-parameter;the gain parameters include the protection board gain subparameter, the processor gain subparameter, and the gain adjustment subparameter.
- The circuit of claim 1, wherein the inverting access terminal of the adder in the cell temperature acquisition sub-circuit is configured with an inverting adjustment resistor;the cell temperature acquisition sub-circuit is configured to determine a cell acquisition temperature from a plurality of the cell temperatures based on a cell temperature parameter determined by an inverse adjustment resistance of an adder in the cell temperature acquisition sub-circuit.
- The circuit of claim 1, wherein the cell temperature acquisition sub-circuit is configured to acquire a first cell temperature of the cell via a thermistor disposed on a first side of the battery protection plate and to acquire a second cell temperature of the cell via a thermistor disposed on a second side of the battery protection plate;the first surface and the second surface are protection plate surfaces which are oppositely arranged.
- The circuit of any of claims 1-4, wherein the correction sub-circuit is configured to:performing gain removal on the battery cell acquisition temperature according to the gain temperature to obtain a gain-removed battery cell acquisition temperature; and is combined with the other components of the water treatment device,and determining the target detection temperature of the battery according to the preset correction parameters and the gain-removed battery core acquisition temperature.
- A battery temperature detection method, characterized by being applied to a battery protection board including the battery temperature detection circuit according to claims 1 to 5, comprising:collecting the temperature of a protection plate of the battery protection plate, the temperature of a processor of a central processing unit and the temperature of a plurality of different parts of battery cores of the battery;determining a battery cell acquisition temperature according to a plurality of battery cell temperatures, and determining the protection plate temperature and the gain temperature of the processor temperature to the battery cell temperature based on a preset gain parameter;and determining the target detection temperature of the battery according to the gain temperature and the battery cell acquisition temperature based on a preset correction parameter, wherein the correction parameter is determined by an inverting adjustment resistor of an adder in a correction sub-circuit.
- The method of claim 6, wherein the gain parameters include a protection plate gain subparameter, a processor gain subparameter, and a gain adjustment subparameter, wherein determining the protection plate temperature and the gain temperature of the processor temperature versus the cell temperature based on preset gain parameters comprises:determining the gain temperature of the protection board from the temperature of the protection board to the temperature of the battery cell based on the gain subparameter of the protection board;determining a processor gain temperature of the processor temperature versus the cell temperature based on the processor gain subparameter;and determining the gain temperature of the protection board and the gain temperature of the processor to the gain temperature of the battery cell based on the gain adjustment subparameter.
- The method of claim 7, wherein said determining a cell acquisition temperature from a plurality of said cell temperatures comprises:and determining the battery cell acquisition temperature according to a plurality of battery cell temperatures based on the battery cell temperature parameters, wherein the battery cell temperature parameters are determined by the reversed phase adjusting resistance of the adder in the battery cell temperature acquisition sub-circuit.
- The method of claim 8, wherein the cell temperature parameter, the protection plate gain subparameter, the processor gain subparameter, the gain adjustment subparameter, and the correction parameter are determined by:Standing the battery cell for a preset period of time, and after the standing is finished, collecting the temperature of a standing protection board of the battery protection board, the temperature of a standing processor of the central processing unit, the temperature of the standing battery cell of a plurality of different parts of the battery cell and the temperature of a standing battery outputted by the battery temperature detection circuit;under the condition that the battery cell is charged by the maximum charging current, collecting the temperature of a charging protection plate of the battery protection plate, the temperature of a charging processor of the central processing unit, the temperature of the charging battery cells at a plurality of different parts of the battery cell and the temperature of the charging battery output by the battery temperature detection circuit;discharging the battery cells under a plurality of preset temperature conditions by using preset discharge current, collecting the discharge protection plate temperature of the battery protection plate, the discharge processor temperature of the central processing unit, the discharge battery cell temperatures of a plurality of different parts of the battery cells and obtaining the discharge battery temperature output by the battery temperature detection circuit;based on a preset calculation formula, determining an initial fitting equation according to the rest battery temperature, the rest protection plate temperature, the rest processor temperature and the rest battery core temperatures;Based on the calculation formula, determining a charging fitting equation according to the rechargeable battery temperature, the charging protection plate temperature, the charging processor temperature and the plurality of charging battery core temperatures;based on the calculation formula, respectively determining a plurality of discharge fitting equations according to the discharge battery temperature, the discharge protection plate temperature, the discharge processor temperature and the discharge cell temperatures under a plurality of preset temperature conditions;and according to the charge fitting equation and the plurality of discharge fitting equations, fitting and calculating to obtain the battery cell temperature parameter, the protection plate gain subparameter, the processor gain subparameter, the gain adjustment subparameter and the correction parameter.
- The method according to any one of claims 6-9, wherein the determining the target detected temperature of the battery based on the gain temperature and the cell acquisition temperature based on a preset correction parameter comprises:performing gain removal on the battery cell acquisition temperature according to the gain temperature to obtain a gain-removed battery cell acquisition temperature;and determining the target detection temperature of the battery according to the preset correction parameters and the gain-removed battery core acquisition temperature.
- A battery protection plate, characterized by comprising:the battery temperature detection circuit of any one of claims 1-5.
- The battery protection plate of claim 11, further comprising:a power supply circuit configured to convert a voltage of power supplied from a battery cell into a voltage required by the battery temperature detection circuit, and supply the converted power to the battery temperature detection circuit as operating power;and an electricity meter configured to convert the voltage-type target detection temperature output from the battery temperature detection circuit into a digital-type target detection temperature.
- A battery, comprising:the battery protection plate according to claim 11 or 12.
- A mobile terminal comprising the battery of claim 13.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2022/094795 WO2023225871A1 (en) | 2022-05-24 | 2022-05-24 | Battery temperature detection circuit and method, battery protection plate, battery, and mobile terminal |
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| CN105633498B (en) * | 2016-03-15 | 2018-05-08 | 北京小米移动软件有限公司 | Battery temperature detection method and device |
| CN107402081B (en) * | 2016-05-18 | 2021-09-03 | 中兴通讯股份有限公司 | Mobile terminal, and method and device for determining battery temperature |
| WO2017201739A1 (en) * | 2016-05-27 | 2017-11-30 | 广东欧珀移动通信有限公司 | Battery protecting board, battery, and mobile terminal |
| CN112713322B (en) * | 2019-10-24 | 2022-05-03 | 北京小米移动软件有限公司 | Battery temperature determination method, battery temperature determination device, and storage medium |
| CN114199394A (en) * | 2021-12-09 | 2022-03-18 | 深圳绿米联创科技有限公司 | Temperature measuring method and device and electronic equipment |
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