CN110400990B - Battery temperature control method and battery temperature control circuit - Google Patents
Battery temperature control method and battery temperature control circuit Download PDFInfo
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- CN110400990B CN110400990B CN201910623114.4A CN201910623114A CN110400990B CN 110400990 B CN110400990 B CN 110400990B CN 201910623114 A CN201910623114 A CN 201910623114A CN 110400990 B CN110400990 B CN 110400990B
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4264—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing with capacitors
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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
- H01M10/4285—Testing apparatus
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a battery temperature control method and a battery temperature control circuit, wherein the battery temperature control method comprises the steps of obtaining a first detection signal corresponding to the ambient temperature; detecting whether the first detection signal is matched with a first preset signal; when the first detection signal is matched with the first preset signal, acquiring a second detection signal corresponding to the battery temperature; detecting whether the second detection signal is matched with a second preset signal; and when the second detection signal is matched with the second preset signal, the heating circuit is started. The matching condition of the first detection signal and the first preset signal is detected, when the first detection signal is matched with the first preset signal, the ambient temperature is indicated to be lower, at the moment, the matching condition of the second detection signal and the second preset signal is continuously detected, when the second detection signal is matched with the second preset signal, the battery temperature is indicated to be lower, then the heating circuit is started to heat the battery, the temperature of the battery is increased, and the normal charge and discharge of the battery under the low-temperature environment are ensured.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a battery temperature control method and a battery temperature control circuit.
Background
With the improvement of living standard of common people, under the condition of power failure, the emergency lamp is used as a lighting tool needed by emergency lighting or emergency power supply places. Traditional emergency light discharges through the charge-discharge battery of taking oneself for the lighting device of emergency light lasts the illumination, and traditional effective charge-discharge temperature of charging and discharging battery needs to be greater than-30 degrees, and under the very low condition of ambient temperature, the battery temperature is less than this temperature and will lead to almost not charging and discharging because of electrolyte loses activity, makes the unable normal work of charging and discharging battery.
Disclosure of Invention
Accordingly, it is desirable to provide a battery temperature control method and a battery temperature control circuit that have simple steps and improve the operational stability of the battery.
A battery temperature control method, comprising: acquiring a first detection signal corresponding to the ambient temperature; detecting whether the first detection signal is matched with a first preset signal; when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature; detecting whether the second detection signal is matched with a second preset signal; and when the second detection signal is matched with a second preset signal, the heating circuit is started.
In one embodiment, the acquiring the first detection signal corresponding to the ambient temperature includes: acquiring a first detection voltage corresponding to the ambient temperature; the detecting whether the first detection signal matches a first preset signal includes: detecting whether the first detection voltage is matched with a first preset voltage or not; when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature comprises: and when the first detection voltage is matched with the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature.
In one embodiment, the detecting whether the first detection voltage matches a first preset voltage includes: detecting whether the first detection voltage is greater than or equal to the first preset voltage; when the first detection voltage is matched with a first preset voltage, acquiring a second detection voltage corresponding to the battery temperature comprises: and when the first detection voltage is greater than or equal to the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature.
In one embodiment, after the detecting whether the first detection voltage is greater than or equal to the first preset voltage, the method further includes: and when the first detection voltage is smaller than the first preset voltage, closing the heating circuit.
In one embodiment, the detecting whether the second detection signal matches a second preset signal includes: detecting whether the second detection voltage is matched with a second preset voltage or not; when the second detection signal matches a second preset signal, turning on the heating circuit includes: and when the second detection voltage is matched with a second preset voltage, starting the heating circuit.
In one embodiment, the detecting whether the second detection voltage matches a second preset voltage includes: detecting whether the second detection voltage is greater than or equal to a second preset voltage; when the second detection voltage is matched with a second preset voltage, the step of starting the heating circuit comprises the following steps: and when the second detection voltage is greater than or equal to a second preset voltage, starting the heating circuit.
In one embodiment, after the detecting whether the second detection voltage is greater than or equal to a second preset voltage, the method further includes: and when the second detection voltage is less than a second preset voltage, closing the heating circuit.
A battery temperature control circuit comprising: the temperature control circuit comprises a control module, a first detection circuit, a second detection circuit and a temperature control circuit; a first input end of the control module is connected with an output end of the first detection circuit, an output end of the first detection circuit outputs a first detection signal, a second input end of the control module is connected with an output end of the second detection circuit, an output end of the second detection circuit outputs a second detection signal, and an output end of the control module is connected with an input end of the temperature control circuit; the control module is used for detecting whether the first detection signal is matched with a first preset signal; when the first detection signal is matched with a first preset signal, detecting whether the second detection signal is matched with a second preset signal; when the second detection signal is matched with a second preset signal, a heating circuit is started; the first detection circuit is used for acquiring a first detection signal corresponding to the ambient temperature; the second detection circuit is used for acquiring a second detection signal corresponding to the battery temperature when the first detection signal is matched with a first preset signal.
In one embodiment, the first detection circuit includes a first resistor, a first temperature sensor, and a first capacitor, a first end of the first resistor is configured to be connected to an external power source, a second end of the first resistor is grounded through the first temperature sensor, a second end of the first resistor is also grounded through the first capacitor, and a second end of the first resistor is connected to the first input end of the control module.
In one embodiment, the second detection circuit includes a second resistor, a second temperature sensor, and a second capacitor, a first end of the second resistor is used for being connected to an external power supply, a second end of the second resistor is grounded through the second temperature sensor, a second end of the second resistor is also grounded through the second capacitor, and a second end of the second resistor is connected to the second input end of the control module.
According to the battery temperature control method and the battery temperature control circuit, the matching condition of a first detection signal corresponding to the ambient temperature and a first preset signal is detected, when the first detection signal is matched with the first preset signal, the ambient temperature is low, the battery temperature is detected at the moment, the matching condition of a second detection signal corresponding to the battery temperature and a second preset signal is continuously detected, when the second detection signal is matched with the second preset signal, the battery temperature is low, the heating circuit is started to heat the battery, the temperature of the battery is increased, normal charging and discharging of the battery in a low-temperature environment are ensured, and the working stability of the battery is improved.
Drawings
FIG. 1 is a flow chart of a battery temperature control method according to an embodiment;
fig. 2 is a schematic structural diagram of a battery temperature control circuit according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention relates to a battery temperature control method. For example, the battery temperature control method includes: acquiring a first detection signal corresponding to the ambient temperature; detecting whether the first detection signal is matched with a first preset signal; when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature; detecting whether the second detection signal is matched with a second preset signal; and when the second detection signal is matched with a second preset signal, the heating circuit is started. According to the battery temperature control method, the matching condition of a first detection signal corresponding to the ambient temperature and a first preset signal is detected, when the first detection signal is matched with the first preset signal, the ambient temperature is low, the battery temperature is detected at the moment, the matching condition of a second detection signal corresponding to the battery temperature and a second preset signal is continuously detected, when the second detection signal is matched with the second preset signal, the battery temperature is low, a heating circuit is started to heat the battery, the temperature of the battery is increased, normal charging and discharging of the battery in a low-temperature environment are ensured, and the working stability of the battery is improved.
Please refer to fig. 1, which is a flowchart illustrating a battery temperature control method according to an embodiment of the invention.
A battery temperature control method comprising part or all of the steps of:
s100: and acquiring a first detection signal corresponding to the ambient temperature.
In this embodiment, for the control of the temperature of the battery, the environment where the battery is located needs to be determined, that is, the temperature of the environment where the battery is located is measured, and the ambient temperature of the battery is high and low as embodied by the battery temperature control circuit.
S200: and detecting whether the first detection signal is matched with a first preset signal.
In this embodiment, the first detection signal corresponds to a current temperature of an environment where the battery is located, and the first preset signal corresponds to one of the environmental temperatures, where the current temperature of the environment where the first detection signal corresponds to the battery may be lower than the current temperature where the first preset signal corresponds to the environmental temperature, or the current temperature of the environment where the first detection signal corresponds to the battery may be higher than the current temperature where the first preset signal corresponds to the environmental temperature. The environment temperature can be changed at any time, namely the battery environment temperature is a variable, so that the first detection signal is also a variable, namely the temperature value corresponding to the first detection signal is variable, and according to the matching result of the temperature value corresponding to the first detection signal and the temperature value corresponding to the first preset signal, the temperature value corresponding to the first preset signal is a basis for judging the environment temperature of the battery, namely whether the battery environment temperature reaches the specified temperature is judged according to the matching condition of the first detection signal and the first preset signal, so that whether the temperature of the battery needs to be detected or not is judged subsequently.
S300: and when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature.
In this embodiment, the first preset signal corresponds to a reference ambient temperature, that is, the first preset signal is a set signal, so that the ambient temperature corresponding to the first preset signal is a fixed temperature, and the first detection signal is obtained from the battery temperature control circuit in real time, so as to obtain a change condition of the ambient temperature, that is, the first detection signal corresponds to the ambient temperature with a change in temperature value. When the ambient temperature detected by the battery temperature control circuit is matched with the reference ambient temperature corresponding to the first preset signal, namely the ambient temperature reaches the reference ambient temperature corresponding to the first preset signal, the ambient temperature reaches the specified temperature at the moment, and the ambient temperature is lower, the temperature of the battery, the temperature of the surface of the battery thermometer or the temperature of the interior of the battery needs to be further obtained at the moment. And battery temperature passes through battery temperature control circuit and converts the second detection signal that corresponds into, and the second detection signal is corresponding to the temperature on the battery surface promptly, the change condition of battery surface temperature is reflected in the change condition of second detection signal, and the operating condition of battery is directly influenced to the height of battery surface temperature, consequently need detect battery surface temperature, is convenient for follow-up control to battery temperature for battery work is at the temperature of normal charge-discharge.
S400: and detecting whether the second detection signal is matched with a second preset signal.
In this embodiment, the second preset signal corresponds to one of the values of the battery temperature, the second detection signal corresponds to the real-time temperature on the battery surface, that is, the second detection signal corresponds to the current temperature of the battery surface, the second detection signal corresponds to the changed battery temperature, and the second preset signal corresponds to the constant value of the battery surface temperature. The second detected signal with the matching of second preset signal is compared, and the real-time temperature that is exactly the battery surface matches and compares with a fixed temperature, and the real-time temperature value on battery surface compares the matching with the fixed temperature value on battery surface promptly, wherein, the battery surface temperature that the second detected signal corresponds is continuously acquireed, is convenient for to the real-time supervision of battery surface temperature to be convenient for judge the relation between the current temperature on battery surface and the battery surface fixed temperature, and then be convenient for follow-up control heating circuit's operating condition.
S500: and when the second detection signal is matched with a second preset signal, the heating circuit is started.
In this embodiment, the current temperature of the battery corresponding to the second detection signal matches with the fixed temperature corresponding to the second preset signal, which indicates that the temperature on the surface of the battery reaches the specified temperature, and the temperature on the surface of the battery is lower, in order to improve the activity of the electrolyte in the low-temperature environment during the operation of the battery, the heater in the heating circuit on the surface of the battery is turned on, so that the temperature of the battery is rapidly increased, the activity of the electrolyte of the battery is increased, and the battery can be normally charged and discharged in the low-temperature environment.
In the above embodiment, the matching condition of the first detection signal corresponding to the ambient temperature and the first preset signal is detected, when the first detection signal is matched with the first preset signal, it indicates that the ambient temperature is low, at this time, the battery temperature is detected, the matching condition of the second detection signal corresponding to the battery temperature and the second preset signal is continuously detected, when the second detection signal is matched with the second preset signal, it indicates that the battery temperature is low, the heating circuit is started to heat the battery, so that the temperature of the battery rises, normal charging and discharging of the battery in a low-temperature environment are ensured, and the working stability of the battery is improved.
In an embodiment, the acquiring the first detection signal corresponding to the ambient temperature includes: acquiring a first detection voltage corresponding to the ambient temperature; the detecting whether the first detection signal matches a first preset signal includes: detecting whether the first detection voltage is matched with a first preset voltage or not; when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature comprises: and when the first detection voltage is matched with the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature.
In this embodiment, the detection signal and the preset signal are both voltage signals, that is, the first detection signal is a first detection voltage, the second detection signal is a second detection voltage, the first preset signal is a first preset voltage, the obtained first detection signal is a first voltage signal for obtaining the battery temperature control current, and whether the first detection signal is matched with the first preset signal or not is detected, that is, whether the first detection voltage is matched with the first preset voltage or not is detected, so that the ambient temperature corresponds to the first detection voltage, one fixed temperature in the ambient temperature corresponds to the first preset voltage, and the battery temperature corresponds to the second detection voltage. Like this, ambient temperature and battery temperature correspond to different voltages, convert temperature signal into voltage signal, are about to physical signal conversion for the comparison of temperature height converts the comparison of voltage size into, and the processing chip of being convenient for acquires the voltage that ambient temperature and battery temperature correspond, thereby is convenient for to ambient temperature and battery temperature's detection.
In one embodiment, the detecting whether the first detection voltage matches a first preset voltage includes: detecting whether the first detection voltage is greater than or equal to the first preset voltage; when the first detection voltage is matched with a first preset voltage, acquiring a second detection voltage corresponding to the battery temperature comprises: and when the first detection voltage is greater than or equal to the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature.
In this embodiment, the first detection voltage is inversely proportional to the ambient temperature, that is, the lower the ambient temperature is, the larger the voltage value of the first detection voltage is, the first preset voltage corresponds to the first detection voltage of the battery temperature control circuit at a fixed ambient temperature, and the temperature corresponding to the first preset voltage is one of the real-time variation processes of the ambient temperature. And when the first detection voltage is greater than or equal to the first preset voltage, the real-time environment temperature is lower than the fixed environment temperature, namely the current environment temperature is lower. At this time, in order to ensure that the battery can be charged and discharged normally and the temperature of the battery is at a higher temperature, the temperature of the battery needs to be detected, and whether the current battery works in a normal state or not can be determined by acquiring the temperature of the battery.
In an embodiment, after the detecting whether the first detection voltage is greater than or equal to the first preset voltage, the method further includes: and when the first detection voltage is smaller than the first preset voltage, closing the heating circuit. In this embodiment, the voltage value is inversely proportional to the temperature value, and the first detection voltage is smaller than the first preset voltage, which indicates that the current ambient temperature is higher than the fixed ambient temperature, i.e., indicates that the current ambient temperature is higher than the specified ambient temperature, i.e., indicates that the current ambient temperature is higher, and the battery is not in a low-temperature environment.
In an embodiment, the temperature value is proportional to the voltage value, that is, the higher the ambient temperature is, the larger the voltage value of the first detection voltage is, and the detecting whether the first detection voltage matches with a first preset voltage includes: detecting whether the first detection voltage is less than or equal to the first preset voltage; when the first detection voltage is matched with a first preset voltage, acquiring a second detection voltage corresponding to the battery temperature comprises: and when the first detection voltage is less than or equal to the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature. Therefore, when the current environment temperature is lower than the temperature corresponding to the first preset voltage, the voltage value of the first detection voltage is smaller than or equal to the first preset voltage, and the current environment temperature is in a low-temperature state.
In an embodiment, the detecting whether the second detection signal matches a second preset signal includes: detecting whether the second detection voltage is matched with a second preset voltage or not; when the second detection signal matches a second preset signal, turning on the heating circuit includes: and when the second detection voltage is matched with a second preset voltage, starting the heating circuit.
In this embodiment, the detection signal and the preset signal are both voltage signals, that is, the second detection signal is a second detection voltage, the second preset signal is a second preset voltage, the obtained second detection signal is a second voltage signal for obtaining the battery temperature control current, and whether the second detection signal is matched with the second preset signal is detected, that is, whether the second detection voltage is matched with the second preset voltage is detected, so that the current battery temperature corresponds to the second detection voltage, one fixed temperature in the battery temperature corresponds to the second preset voltage, wherein the temperature corresponding to the second preset voltage is one of the real-time change processes of the battery temperature. Like this, battery temperature corresponds to different voltages, converts temperature signal into voltage signal, is about to physical signal conversion for the comparison of battery temperature height converts the comparison of voltage size into, and the processing chip of being convenient for acquires the voltage that battery temperature corresponds, thereby is convenient for to the detection of battery temperature. And when the second detection voltage is matched with the second preset voltage, the detected current temperature of the battery is successfully matched with the preset battery temperature, namely the current temperature of the battery is lower than the second preset temperature, the battery temperature reaches a lower temperature, the temperature of the battery is raised by starting the heating circuit, normal charging and discharging of the battery in a low-temperature environment are ensured, and the working stability of the battery is improved.
In an embodiment, the detecting whether the second detection voltage matches a second preset voltage includes: detecting whether the second detection voltage is greater than or equal to a second preset voltage; when the second detection voltage is matched with a second preset voltage, the step of starting the heating circuit comprises the following steps: and when the second detection voltage is greater than or equal to a second preset voltage, starting the heating circuit. In this embodiment, the second detection voltage is inversely proportional to the battery temperature, that is, the lower the battery temperature is, the larger the voltage value of the second detection voltage is, and the second preset voltage corresponds to the second detection voltage of the battery temperature control circuit at a fixed battery temperature, where the temperature corresponding to the second preset voltage is one of the real-time variation processes of the battery temperature. And when the second detection voltage is greater than or equal to the second preset voltage, the real-time battery temperature is lower than the fixed battery temperature, namely the current battery temperature is lower. At this moment, in order to ensure that the battery can be normally charged and discharged, the temperature on the surface of the battery is higher, the temperature of the battery needs to be raised, and the temperature on the surface of the battery is raised to a proper temperature by starting the heating circuit, so that the battery can be normally charged and discharged.
In an embodiment, after the detecting whether the second detection voltage is greater than or equal to a second preset voltage, the method further includes: and when the second detection voltage is less than a second preset voltage, closing the heating circuit. In this embodiment, the voltage value is inversely proportional to the temperature value, and the second detection voltage being less than the second preset voltage indicates that the current battery temperature is higher than the fixed battery temperature, i.e., indicates that the current battery temperature is higher than the specified battery temperature, i.e., indicates that the current battery temperature is higher, and the surface temperature of the battery is not in a low-temperature environment, and at this time, the battery is charged and discharged normally, and the temperature of the battery does not need to be raised, i.e., the heating circuit is turned off, so that the damage rate of the battery with an excessively high temperature is reduced.
In an embodiment, the temperature value is proportional to the voltage value, that is, the higher the battery temperature is, the larger the voltage value of the second detection voltage is, and the detecting whether the second detection voltage matches with a second preset voltage includes: detecting whether the second detection voltage is less than or equal to the second preset voltage; when the second detection voltage is matched with a second preset voltage, the step of starting the heating circuit comprises the following steps: and when the second detection voltage is less than or equal to the second preset voltage, starting a heating circuit. Therefore, the current battery temperature is lower than the temperature corresponding to the second preset voltage, the voltage value of the second detection voltage is smaller than or equal to the second preset voltage, the current battery temperature is in a low-temperature state, and at the moment, the heating circuit is started, so that the temperature of the surface of the battery is increased to a proper temperature, and the battery is charged and discharged normally.
In an embodiment, a temperature corresponding to the first preset voltage is lower than a temperature corresponding to the second preset voltage.
In an embodiment, the temperature corresponding to the first predetermined voltage is minus 50 ℃, and the temperature corresponding to the second predetermined voltage is minus 30 ℃.
In an embodiment, when the second detection voltage matches a second preset voltage, the turning on the heating circuit includes: detecting whether the second detection voltage is smaller than a third preset voltage or not; and when the second detection voltage is less than a third preset voltage, closing the heating circuit. In this embodiment, the temperature corresponding to the third preset voltage is higher than the temperature corresponding to the second preset voltage, for example, the temperature corresponding to the third preset voltage is 0 ℃. Because the temperature and the voltage are in an inverse relation, when the second detection voltage is smaller than a third preset voltage, the current battery temperature is higher than the temperature corresponding to the third preset voltage, the battery is in a normal charge-discharge state at the moment, and the heating circuit is turned off to reduce the failure rate caused by the overhigh battery temperature.
In an embodiment, after the detecting whether the second detection voltage is smaller than a third preset voltage, the method further includes: and when the second detection voltage is greater than or equal to a third preset voltage, the heating circuit is kept on. In this embodiment, the third preset voltage also corresponds to one of the varied battery temperatures, moreover, the temperature corresponding to the third preset voltage is higher than the temperature corresponding to the second preset voltage, the second detection voltage is greater than or equal to a third preset voltage, which indicates that the battery temperature is higher than the temperature corresponding to the second preset voltage and lower than the temperature corresponding to the third preset voltage, i.e. the current battery temperature is between the temperature corresponding to the second preset voltage and the temperature corresponding to the third preset voltage, wherein, the temperature corresponding to the third preset voltage is the highest temperature of the heating circuit for heating the battery, in order to ensure that the battery works in a normal charging and discharging state, the heating circuit is controlled to be started by detecting the second detection voltage corresponding to the battery temperature, so that the temperature of the battery is maintained at a proper temperature.
In one embodiment, a battery temperature control circuit is provided, referring to fig. 2, a battery temperature control circuit 10 includes: the detection circuit comprises a control module, a first detection circuit 100, a second detection circuit 200 and a temperature control circuit 300; in this embodiment, the control module includes a processing chip U1, a first input end INT1 of the processing chip U1 is connected to an output end TA of the first detection circuit 100, the output end TA of the first detection circuit 100 outputs a first detection signal, a second input end INT2 of the processing chip U1 is connected to an output end TB of the second detection circuit 200, the output end TB of the second detection circuit 200 outputs a second detection signal, and an output end OUT1 of the processing chip U1 is connected to an input end HP of the temperature control circuit 300; the processing chip U1 is used for detecting whether the first detection signal matches a first preset signal; when the first detection signal is matched with a first preset signal, detecting whether the second detection signal is matched with a second preset signal; when the second detection signal is matched with a second preset signal, a heating circuit is started; the first detection circuit 100 is configured to obtain a first detection signal corresponding to an ambient temperature; the second detection circuit 200 is configured to obtain a second detection signal corresponding to the battery temperature when the first detection signal matches a first preset signal. In this embodiment, the first detection signal includes a first detection voltage, the second detection signal includes a second detection voltage, the first preset signal includes a first preset voltage, and the second preset signal includes a second preset voltage.
In an embodiment, referring to fig. 2, the first detection circuit 100 includes a first resistor R1, a first temperature sensor NTC1, and a first capacitor C1, a first end of the first resistor R1 is configured to be connected to an external power source VSS, a second end of the first resistor R1 is grounded through the first temperature sensor NTC1, a second end of the first resistor R1 is further grounded through the first capacitor C1, and a second end of the first resistor R1 is connected to the first input end INT1 of the processing chip U1. The first temperature sensor NTC1 is used for detecting the ambient temperature, the first end of the first temperature sensor NTC1 is the second end of the first resistor R1, the second end of the first resistor R1 is used for outputting a first detection voltage corresponding to the ambient temperature, the first detection voltage is equal to the voltage drop on the first temperature sensor NTC1, the voltage drop of the first temperature sensor NTC1 is related to the ambient temperature, and the voltage of the first end of the first temperature sensor NTC1 is changed by detecting the changed ambient temperature, namely the first detection voltage is changed. In this embodiment, the first Temperature sensor NTC1 includes an NTC (Negative Temperature Coefficient) resistor, and the first detection voltage is a voltage of a first end of the NTC resistor, such that the magnitude of the first detection voltage is inversely proportional to the magnitude of the ambient Temperature, that is, when the ambient Temperature is lower, the resistance of the NTC resistor is larger, the first detection voltage is also larger, and the magnitude of the current ambient Temperature is reflected by obtaining the magnitude of the first detection voltage. The first capacitor C1 is used for filtering, so as to reduce the voltage mixed with the high-frequency signal in the first detection voltage, thereby making the output of the first detection voltage more stable, and facilitating the processing chip U1 to obtain the first detection voltage.
In an embodiment, the first resistor and the first temperature sensor are arranged in a replaceable manner, the first temperature sensor includes an NTC resistor, a first end of the first temperature sensor is used for being connected with an external power supply VSS, a second end of the first temperature sensor is grounded through the first resistor, the second end of the first temperature sensor is also grounded through the first capacitor, and the second end of the first temperature sensor is connected with the first input end of the processing chip. Thus, the first detection voltage is proportional to the ambient temperature, i.e., the lower the ambient temperature, the smaller the first detection voltage.
In an embodiment, referring to fig. 2, the second detection circuit 200 includes a second resistor R2, a second temperature sensor NTC2 and a second capacitor C2, a first end of the second resistor R2 is configured to be connected to an external power source VSS, a second end of the second resistor R2 is grounded through the second temperature sensor NTC2, a second end of the second resistor R2 is further grounded through the second capacitor C2, and a second end of the second resistor R2 is connected to the second input end INT2 of the processing chip U1. The second temperature sensor NTC2 is used for detecting the battery temperature, the first end of the second temperature sensor NTC2 is the second end of the second resistor R2, the second end of the second resistor R2 is used for outputting a second detection voltage corresponding to the battery temperature, the second detection voltage is equal to the voltage drop across the second temperature sensor NTC2, the voltage drop across the second temperature sensor NTC2 is related to the battery temperature, and the voltage across the first end of the second temperature sensor NTC2 is changed by detecting the changed battery temperature, that is, the second detection voltage is changed. In this embodiment, the second temperature sensor NTC2 includes an NTC resistor, and the second detection voltage is a voltage of a first end of the NTC resistor, such that the magnitude of the second detection voltage is inversely proportional to the magnitude of the battery temperature, that is, when the battery temperature is lower, the resistance of the NTC resistor is larger, the second detection voltage is also larger, and the magnitude of the current battery temperature is reflected by obtaining the magnitude of the second detection voltage. The second capacitor C2 is used for filtering, so as to reduce the voltage of the second detection voltage mixed with high-frequency signals, thereby making the output of the second detection voltage more stable, and facilitating the processing chip U1 to obtain the second detection voltage.
In an embodiment, the second resistor and the second temperature sensor are arranged in an exchangeable manner, the second temperature sensor includes an NTC resistor, a first end of the second temperature sensor is used for being connected to an external power supply, a second end of the second temperature sensor is grounded through the second resistor, a second end of the second temperature sensor is also grounded through the second capacitor, and a second end of the second temperature sensor is connected to the second input end of the processing chip. Thus, the second detection voltage is proportional to the battery temperature, i.e., the lower the battery temperature, the smaller the second detection voltage.
In one embodiment, the first and second Temperature sensors comprise PTC (Positive Temperature Coefficient) resistors.
In one embodiment, the detection signal and the preset signal comprise a current signal, for example, the first detection circuit comprises a first resistor, a first temperature sensor and a first capacitor, the first resistor, the first temperature sensor and the first capacitor are connected in parallel, and the first detection signal is the current signal of the first temperature sensor; for another example, the second detection circuit includes a second resistor, a second temperature sensor, and a second capacitor, the second resistor, the second temperature sensor, and the second capacitor are connected in parallel, and the second detection signal is a current signal of the second temperature sensor. The current of the first temperature sensor is in direct proportion to the ambient temperature, and the current of the second temperature sensor is in direct proportion to the battery temperature. For other signals, any relationship between the detection signal and the temperature signal is applicable to the above embodiment.
In an embodiment, referring to fig. 2, the temperature control circuit 300 includes a heater HE1, a third resistor R3, and an electronic switch Q1, a first end of the heater HE1 is configured to be connected to a reference power VDD, a second end of the heater HE1 is connected to a first end T1 of the electronic switch Q1, a control end T0 of the electronic switch Q1 is grounded through the third resistor R3, a second end T2 of the electronic switch Q1 is configured to be grounded, and a control end T0 of the electronic switch Q1 is further configured to be connected to an output end OUT1 of the processing chip U1. When the first detection voltage is greater than or equal to the first preset voltage and the second detection voltage is greater than or equal to the second preset voltage, an output end OUT1 of the processing chip U1 outputs a high potential, so that the electronic switching tube Q1 is turned on, and the heater HE1 starts to operate, that is, the heater HE1 is in a heating state to heat a battery. In this embodiment, the electronic switch Q1 includes an N-type insulated gate field effect transistor, the first terminal of the electronic switch Q1 is a drain of the N-type insulated gate field effect transistor, the second terminal of the electronic switch Q1 is a source of the N-type insulated gate field effect transistor, and the control terminal of the electronic switch Q1 is a gate of the N-type insulated gate field effect transistor.
In one embodiment, the heater is a heat generating film.
In one embodiment, the heater is a heating coil formed by winding a plurality of resistance wires.
In one embodiment, the external power supply and the reference power supply are low-voltage direct currents obtained by rectifying, filtering and reducing the voltage of the mains supply, and the output voltage of the reference power supply is greater than the output voltage of the external power supply.
Above-mentioned battery temperature control circuit, detect the first detected signal that ambient temperature corresponds and the matching condition of first preset signal, when first detected signal matches with first preset signal, then indicate that ambient temperature is lower, detect battery temperature this moment, continue to detect the matching condition of second detected signal and the second preset signal that battery temperature corresponds, when second detected signal matches with the second preset signal, then indicate that battery temperature is lower, then open heating circuit and heat for the battery, make the temperature of battery rise, ensured that the battery normally charges and discharges under low temperature environment, the stability of battery work has been improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A battery temperature control method, comprising:
acquiring a first detection signal corresponding to the ambient temperature;
detecting whether the first detection signal is matched with a first preset signal;
when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature;
detecting whether the second detection signal is matched with a second preset signal; the temperature corresponding to the first preset signal is lower than the temperature corresponding to the second preset signal;
when the second detection signal is matched with a second preset signal, a heating circuit is started;
after the turning on the heating circuit, the method further comprises:
detecting whether the temperature corresponding to the second detection signal is higher than the temperature corresponding to the third preset voltage;
and when the temperature corresponding to the second detection signal is higher than the temperature corresponding to the third preset voltage, closing the heating circuit.
2. The battery temperature control method according to claim 1, wherein the acquiring a first detection signal corresponding to an ambient temperature includes:
acquiring a first detection voltage corresponding to the ambient temperature;
the detecting whether the first detection signal matches a first preset signal includes:
detecting whether the first detection voltage is matched with a first preset voltage or not;
when the first detection signal is matched with a first preset signal, acquiring a second detection signal corresponding to the battery temperature comprises:
and when the first detection voltage is matched with the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature.
3. The battery temperature control method according to claim 2, wherein the detecting whether the first detection voltage matches a first preset voltage includes:
detecting whether the first detection voltage is greater than or equal to the first preset voltage;
when the first detection voltage is matched with a first preset voltage, acquiring a second detection voltage corresponding to the battery temperature comprises:
and when the first detection voltage is greater than or equal to the first preset voltage, acquiring a second detection voltage corresponding to the battery temperature.
4. The battery temperature control method according to claim 3, further comprising, after the detecting whether the first detected voltage is greater than or equal to the first preset voltage:
and when the first detection voltage is smaller than the first preset voltage, closing the heating circuit.
5. The battery temperature control method according to claim 2, wherein the detecting whether the second detection signal matches a second preset signal comprises:
detecting whether the second detection voltage is matched with a second preset voltage or not;
when the second detection signal matches a second preset signal, turning on the heating circuit includes:
and when the second detection voltage is matched with a second preset voltage, starting the heating circuit.
6. The battery temperature control method according to claim 5, wherein the detecting whether the second detection voltage matches a second preset voltage includes:
detecting whether the second detection voltage is greater than or equal to a second preset voltage;
when the second detection voltage is matched with a second preset voltage, the step of starting the heating circuit comprises the following steps:
and when the second detection voltage is greater than or equal to a second preset voltage, starting the heating circuit.
7. The battery temperature control method according to claim 6, further comprising, after the detecting whether the second detected voltage is greater than or equal to a second preset voltage:
and when the second detection voltage is less than a second preset voltage, closing the heating circuit.
8. A battery temperature control circuit, comprising: the temperature control circuit comprises a control module, a first detection circuit, a second detection circuit and a temperature control circuit;
a first input end of the control module is connected with an output end of the first detection circuit, an output end of the first detection circuit outputs a first detection signal, a second input end of the control module is connected with an output end of the second detection circuit, an output end of the second detection circuit outputs a second detection signal, and an output end of the control module is connected with an input end of the temperature control circuit;
the control module is used for detecting whether the first detection signal is matched with a first preset signal; when the first detection signal is matched with a first preset signal, detecting whether the second detection signal is matched with a second preset signal; when the second detection signal is matched with a second preset signal, a heating circuit is started; the temperature corresponding to the first preset signal is lower than the temperature corresponding to the second preset signal;
the first detection circuit is used for acquiring a first detection signal corresponding to the ambient temperature;
the second detection circuit is used for acquiring a second detection signal corresponding to the battery temperature when the first detection signal is matched with a first preset signal;
the control module is further used for detecting whether the temperature corresponding to the second detection signal is higher than the temperature corresponding to the third preset voltage; and when the temperature corresponding to the second detection signal is higher than the temperature corresponding to the third preset voltage, closing the heating circuit.
9. The battery temperature control circuit according to claim 8, wherein the first detection circuit comprises a first resistor, a first temperature sensor and a first capacitor, a first end of the first resistor is used for being connected with an external power supply, a second end of the first resistor is grounded through the first temperature sensor, a second end of the first resistor is also grounded through the first capacitor, and a second end of the first resistor is connected with the first input end of the control module.
10. The battery temperature control circuit according to claim 8, wherein the second detection circuit comprises a second resistor, a second temperature sensor and a second capacitor, a first end of the second resistor is used for being connected with an external power supply, a second end of the second resistor is grounded through the second temperature sensor, a second end of the second resistor is also grounded through the second capacitor, and a second end of the second resistor is connected with the second input end of the control module.
11. The battery temperature control circuit of claim 8, wherein the temperature control circuit comprises a heater, a third resistor and an electronic switch tube, a first end of the heater is used for being connected with a reference power supply, a second end of the heater is connected with a first end of the electronic switch tube, a control end of the electronic switch tube is grounded through the third resistor, a second end of the electronic switch tube is used for being grounded, and the control end of the electronic switch tube is further used for being connected with an output end of the processing chip.
12. The battery temperature control circuit according to claim 11, wherein the heater is a heating coil formed by winding a heating film or a plurality of resistance wires.
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