CN116298971A - Self-adaptive battery voltage detection circuit, device and quick-charging device - Google Patents

Self-adaptive battery voltage detection circuit, device and quick-charging device Download PDF

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Publication number
CN116298971A
CN116298971A CN202310230355.9A CN202310230355A CN116298971A CN 116298971 A CN116298971 A CN 116298971A CN 202310230355 A CN202310230355 A CN 202310230355A CN 116298971 A CN116298971 A CN 116298971A
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China
Prior art keywords
battery
voltage detection
detected
voltage
input end
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CN202310230355.9A
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Chinese (zh)
Inventor
罗庆华
张富彬
刘浩淼
王诺
钟裕捷
李仕胜
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Beijing Epcmicro Technology Co ltd
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Beijing Epcmicro Technology Co ltd
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Priority to CN202310230355.9A priority Critical patent/CN116298971A/en
Publication of CN116298971A publication Critical patent/CN116298971A/en
Pending legal-status Critical Current

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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]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a self-adaptive battery voltage detection circuit, equipment and a quick charging device, wherein the circuit comprises: the device comprises a voltage detection module, an analog-to-digital converter, a comparison module and a processor, wherein a first input end of the voltage detection module is connected with an anode of a battery to be detected, a second input end of the voltage detection module is connected with a cathode of the battery to be detected, an output end of the voltage detection module is respectively connected with an input end of the comparison module and an input end of the analog-to-digital converter, an output end of the analog-to-digital converter and an output end of the comparison module are respectively connected with the processor, an output end of the processor is connected with an input end of the comparison module, and the comparison module is used for outputting a full-charge prompt signal when the battery to be detected is full and adjusting a reference voltage when the battery to be detected is full according to a control signal of the processor. According to the invention, the reference voltage of the battery to be detected when the battery to be detected is full can be adaptively adjusted according to the service condition of the battery to be detected, so that the service safety and service life of the battery are effectively ensured, and the safety performance of the battery is improved.

Description

Self-adaptive battery voltage detection circuit, device and quick-charging device
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a self-adaptive battery voltage detection circuit, device, and quick-charging apparatus.
Background
The battery applied to the electronic equipment generally has states of charging, standing, discharging and the like, in order to make timely and correct protection and control on the battery in different states, the charging and discharging states of the battery often need to be identified, the charging and discharging states can be judged by monitoring the voltage of the battery, and a correct subsequent control method is made according to the voltage state of the battery. Especially when charging the battery, if the battery is charged continuously after being fully charged, the battery is easy to damage, and the voltage value when the battery is fully charged along with the increase of the service time of the battery or other irresistible damage, can also be reduced, if the same reference voltage is also used for judging whether the battery is fully charged, the damage of the battery can be further caused, the service life of the battery is reduced, and even potential safety hazards appear. The existing battery voltage detection circuit cannot be correspondingly adjusted according to the change of the voltage value when the battery is full, and further damage to the battery is caused.
Disclosure of Invention
One or more embodiments of the present invention describe an adaptive battery voltage detection circuit, apparatus, and fast charging device, so as to solve the problems in the prior art that the battery voltage detection circuit cannot make corresponding adjustment according to the change of the voltage value when the battery is full, resulting in damage to the battery, reduction of the service life of the battery, and potential safety hazard.
In one aspect of the present invention, there is provided an adaptive battery voltage detection circuit comprising: the device comprises a voltage detection module, an analog-to-digital converter, a comparison module and a processor, wherein a first input end of the voltage detection module is connected with the positive electrode of a battery to be detected, a second input end of the voltage detection module is connected with the negative electrode of the battery to be detected, an output end of the voltage detection module is respectively connected with the input end of the comparison module and the input end of the analog-to-digital converter, an output end of the analog-to-digital converter and the output end of the comparison module are respectively connected with the processor, an output end of the processor is connected with the input end of the comparison module,
the voltage detection module is used for detecting the voltage value of the battery to be detected; the analog-to-digital converter is used for converting the voltage value of the battery to be detected into digital quantity; the comparison module is used for outputting a full-charge prompt signal when the battery to be detected is full, and adjusting the reference voltage when the battery to be detected is full according to the control signal of the processor; the processor is used for analyzing the regulating value of the reference voltage according to the digital quantity of the battery to be detected and the full-charge prompt signal and outputting a corresponding regulating control signal to the comparison module.
Further, the voltage detection module comprises a fully differential operational amplification circuit and a level shift circuit, wherein a first input end of the fully differential operational amplification circuit is used as a first input end and a second input end of the voltage detection module and is used as a second input end of the voltage detection module, an output end of the fully differential operational amplification circuit is connected with an input end of the potential shift circuit, an output end of the potential shift circuit is used as an output end of the voltage detection module, the fully differential motion amplification circuit is used for collecting voltage signals of a battery to be detected and carrying out amplification or reduction processing of a preset proportion on the collected voltage signals, the level shift circuit is used for increasing a preset shift level on the voltage signals output by the fully differential operational amplification circuit, and the comparison circuit is used for outputting full-charge prompt signals when the battery to be detected is full.
Further, the comparison module comprises a reference voltage adjusting unit and a comparison unit, wherein the reference voltage adjusting unit is connected with a first input end of the comparison unit, a second input end of the comparison unit is connected with an output end of the voltage detection module, an output end of the comparison unit is used as an output end of the comparison module, and an input end of the reference voltage adjusting unit is used as an input end of the comparison module; the reference voltage adjusting unit is used for realizing a self-adaptive parameter adjusting function based on a preset algorithm model, and is specifically used for adjusting parameters of the reference voltage adjusting unit according to the adjusting control signal so as to adjust an output reference voltage value, and the comparing unit is used for comparing the magnitude relation between the voltage value of the battery to be detected and the reference voltage, and outputting a full-charge prompt signal when the voltage value of the voltage to be detected is greater than or equal to the reference voltage.
Another aspect of the present invention also provides an adaptive battery voltage detection apparatus, where the battery voltage detection device includes the adaptive battery voltage detection circuit according to the above embodiments.
Another aspect of the present invention also provides a fast charging device, which includes the adaptive battery voltage detection circuit according to the foregoing embodiments.
The embodiment of the invention provides a self-adaptive battery voltage detection circuit, equipment and a quick charging device, wherein the self-adaptive battery voltage detection circuit comprises: the device comprises a voltage detection module, an analog-to-digital converter, a comparison module and a processor, wherein a first input end of the voltage detection module is connected with an anode of a battery to be detected, a second input end of the voltage detection module is connected with a cathode of the battery to be detected, an output end of the voltage detection module is respectively connected with an input end of the comparison module and an input end of the analog-to-digital converter, an output end of the analog-to-digital converter and an output end of the comparison module are respectively connected with the processor, and an output end of the processor is connected with an input end of the comparison module, wherein the voltage detection module is used for detecting a voltage value of the battery to be detected; the analog-to-digital converter is used for converting the voltage value of the battery to be detected into digital quantity; the comparison module is used for outputting a full-charge prompt signal when the battery to be detected is full, and adjusting the reference voltage when the battery to be detected is full according to the control signal of the processor; the processor is used for analyzing the regulating value of the reference voltage according to the digital quantity of the battery to be detected and the full-charge prompt signal and outputting a corresponding regulating control signal to the comparison module. According to the invention, the reference voltage of the battery to be detected when the battery to be detected is full can be adaptively adjusted according to the service condition of the battery to be detected, so that the service safety and service life of the battery are effectively ensured, and the safety performance of the battery is improved.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present description, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a circuit for detecting a voltage of an adaptive battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an adaptive battery voltage detection circuit according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It will be understood by those skilled in the art that all terms (including 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 unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Fig. 1 is a block diagram of a self-adaptive battery voltage detection circuit according to an embodiment of the present invention, and referring to fig. 1, the self-adaptive battery voltage detection circuit according to an embodiment of the present invention includes: the voltage detection module 10, the analog-to-digital converter 20, the comparison module 30 and the processor 40, wherein the processor 40 is an EPC30xxx SoC (Power Battery management control chip), the analog-to-digital converter 20 is an ADC, a first input end of the voltage detection module 10 is connected with a positive pole VBAT+ of a battery to be detected, a second input end of the voltage detection module 10 is connected with a negative pole VBAT-of the battery to be detected, an output end of the voltage detection module 20 is respectively connected with an input end of the comparison module 30 and an input end of the analog-to-digital converter 20, an output end of the analog-to-digital converter 20 and an output end of the comparison module 30 are respectively connected with the processor 40, and an output end of the processor 40 is connected with an input end of the comparison module 30.
The voltage detection module 10 is configured to detect a voltage value of the battery to be detected, and output an analog signal Vout of the voltage value of the battery to be detected to the analog-to-digital converter 20; the analog-to-digital converter 20 is used for converting the voltage value of the battery to be detected into a digital quantity and transmitting a converted digital quantity signal Dout to the processor 40; the comparison module 30 is configured to output a full-charge prompt signal Detect when the battery to be detected is full, and adjust a reference voltage when the battery to be detected is full according to a Control signal Control of the processor 40; the processor 40 is configured to analyze the adjustment value of the reference voltage according to the digital quantity of the battery to be detected and the full-charge prompt signal, and output a corresponding adjustment Control signal Control to the comparison module 30.
It should be noted that, the adaptive battery voltage detection circuit according to the embodiment of the present invention is for detecting a single battery, and aims to implement adaptive adjustment for a full determination signal in a battery voltage detection process.
Further, the voltage detection module 10 of the embodiment of the present invention includes a fully differential operational amplification circuit and a level shift circuit, where a first input end of the fully differential operational amplification circuit is used as a first input end and a second input end of the voltage detection module 10 are used as a second input end of the voltage detection module 10, an output end of the fully differential operational amplification circuit is connected with an input end of the potential shift circuit 102, and an output end of the potential shift circuit is used as an output end of the voltage detection module 10, and the fully differential motion amplification circuit is used to collect a voltage signal of a battery to be detected and perform amplification or reduction processing of a preset proportion on the collected voltage signal, and the level shift circuit is used to increase a preset shift level on the voltage signal output by the fully differential operational amplification circuit. For the specific structure of the voltage detection module 10, there are many design structures in the prior art, and the present invention will not be described in detail.
Fig. 2 schematically illustrates a structural schematic diagram of an adaptive battery voltage detection circuit according to an embodiment of the present invention, referring to fig. 2, a comparison module 30 according to an embodiment of the present invention includes a reference voltage adjusting unit 302 and a comparison unit 301, where the reference voltage adjusting unit 302 is connected to a first input terminal of the comparison unit 301, a second input terminal of the comparison unit 301 is connected to an output terminal of the voltage detection module 10, and an output terminal of the comparison unit 301 is used as an output terminal of the comparison module 30, and is used to send a signal detect to a controller 40, and an input terminal of the reference voltage adjusting unit 302 is used as an input terminal of the comparison module 30, and is used to receive a Control signal Control of the processor 40; the reference voltage adjusting unit 302 has a function of adjusting adaptive parameters based on a preset algorithm model, and is specifically configured to adjust parameters of the reference voltage adjusting unit according to the adjustment control signal to adjust an output reference voltage value, and the comparing unit 301 is configured to compare a magnitude relation between the voltage value of the battery to be detected and the reference voltage, and output a full-charge prompt signal when the voltage value of the voltage to be detected is greater than or equal to the reference voltage.
The self-adaptive battery voltage detection circuit provided by the embodiment of the invention realizes the feedback regulation of battery voltage detection through the reference voltage regulation unit, and the self-adaptive regulation of the full-judging reference voltage of the battery according to the control signal of the processor 40 can detect the battery voltage in real time according to the service condition of the battery, thereby improving the intelligence of battery voltage detection and being beneficial to further maintaining the stability of the battery function in the use process of the battery.
In another aspect of the embodiment of the present invention, there is further provided a battery voltage detection apparatus, where the battery voltage detection device includes the adaptive battery voltage detection circuit in the above embodiment.
In another aspect of the embodiment of the present invention, a fast charging device is provided, where the fast charging device includes the adaptive battery voltage detection circuit in the foregoing embodiment.
The embodiment of the invention provides a self-adaptive battery voltage detection circuit, equipment and a quick charging device, wherein the self-adaptive battery voltage detection circuit comprises: the voltage detection device comprises a voltage detection module 10, an analog-to-digital converter 20, a comparison module 30 and a processor 40, wherein a first input end of the voltage detection module 10 is connected with a positive pole VBAT+ of a battery to be detected, a second input end of the voltage detection module 10 is connected with a negative pole VBAT-of the battery to be detected, an output end of the voltage detection module 10 is respectively connected with an input end of the comparison module 30 and an input end of the analog-to-digital converter 20, an output end of the analog-to-digital converter 20 and an output end of the comparison module 30 are respectively connected with the processor 40, and an output end of the processor 40 is connected with an input end of the comparison module 30, wherein the voltage detection module 10 is used for detecting a voltage value of the battery to be detected; the analog-to-digital converter 20 is used for converting the voltage value of the battery to be detected into a digital quantity Dout; the comparison module 30 is configured to output a full-charge prompt signal Detect when the battery to be detected is full, and adjust a reference voltage when the battery to be detected is full according to a Control signal Control of the processor 40; the processor 40 is configured to analyze the adjustment value of the reference voltage according to the digital quantity of the battery to be detected and the full-charge prompt signal and output a corresponding adjustment control signal to the comparison module 30. According to the invention, the reference voltage of the battery to be detected when the battery to be detected is full can be adaptively adjusted according to the service condition of the battery to be detected, so that the service safety and service life of the battery are effectively ensured, and the safety performance of the battery is improved.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments in part.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, a pendant, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention in further detail, and are not to be construed as limiting the scope of the invention, but are merely intended to cover any modifications, equivalents, improvements, etc. based on the teachings of the invention.

Claims (5)

1. An adaptive battery voltage detection circuit, the circuit comprising: the device comprises a voltage detection module, an analog-to-digital converter, a comparison module and a processor, wherein a first input end of the voltage detection module is connected with the positive electrode of a battery to be detected, a second input end of the voltage detection module is connected with the negative electrode of the battery to be detected, an output end of the voltage detection module is respectively connected with the input end of the comparison module and the input end of the analog-to-digital converter, an output end of the analog-to-digital converter and an output end of the comparison module are respectively connected with the processor, an output end of the processor is connected with the input end of the comparison module,
the voltage detection module is used for detecting the voltage value of the battery to be detected; the analog-to-digital converter is used for converting the voltage value of the battery to be detected into digital quantity; the comparison module is used for outputting a full-charge prompt signal when the battery to be detected is full, and adjusting the reference voltage when the battery to be detected is full according to the control signal of the processor; the processor is used for analyzing the regulating value of the reference voltage according to the digital quantity of the battery to be detected and the full-charge prompt signal and outputting a corresponding regulating control signal to the comparison module.
2. The circuit according to claim 1, wherein the voltage detection module comprises a fully differential operational amplification circuit and a level shift circuit, a first input end of the fully differential operational amplification circuit is used as a first input end of the voltage detection module, a second input end of the fully differential operational amplification circuit is used as a second input end of the voltage detection module, an output end of the fully differential operational amplification circuit is connected with an input end of the potential shift circuit, an output end of the potential shift circuit is used as an output end of the voltage detection module, the fully differential motion amplification circuit is used for collecting voltage signals of a battery to be detected and performing amplification or reduction processing of preset proportion on the collected voltage signals, and the level shift circuit is used for increasing preset shift level on the voltage signals output by the fully differential operational amplification circuit.
3. The circuit of claim 1, wherein the comparison module comprises a reference voltage adjustment unit and a comparison unit, the reference voltage adjustment unit is connected with a first input terminal of the comparison unit, a second input terminal of the comparison unit is connected with an output terminal of the voltage detection module, an output terminal of the comparison unit is used as an output terminal of the comparison module, and an input terminal of the reference voltage adjustment unit is used as an input terminal of the comparison module; the reference voltage adjusting unit is used for realizing a self-adaptive parameter adjusting function based on a preset algorithm model, and is particularly used for adjusting the reference voltage value output by the reference voltage adjusting unit according to the adjusting control signal, and the comparing unit is used for comparing the magnitude relation between the voltage value of the battery to be detected and the reference voltage and outputting a full-charge prompt signal when the voltage value of the voltage to be detected is greater than or equal to the reference voltage.
4. An adaptive battery voltage detection apparatus comprising an adaptive battery voltage detection circuit according to any one of claims 1 to 3.
5. A fast charging device comprising an adaptive battery voltage detection circuit according to any one of claims 1-3.
CN202310230355.9A 2023-03-10 2023-03-10 Self-adaptive battery voltage detection circuit, device and quick-charging device Pending CN116298971A (en)

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CN202310230355.9A CN116298971A (en) 2023-03-10 2023-03-10 Self-adaptive battery voltage detection circuit, device and quick-charging device

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CN202310230355.9A CN116298971A (en) 2023-03-10 2023-03-10 Self-adaptive battery voltage detection circuit, device and quick-charging device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116718935A (en) * 2023-08-08 2023-09-08 成都爱旗科技有限公司 Battery detection device and battery detection method
CN117129746A (en) * 2023-08-25 2023-11-28 广芯微电子(苏州)有限公司 Voltage detection method and circuit
CN117134012A (en) * 2023-10-26 2023-11-28 河南锂动电源有限公司 Fault self-detection lithium battery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116718935A (en) * 2023-08-08 2023-09-08 成都爱旗科技有限公司 Battery detection device and battery detection method
CN116718935B (en) * 2023-08-08 2023-11-07 成都爱旗科技有限公司 Battery detection device and battery detection method
CN117129746A (en) * 2023-08-25 2023-11-28 广芯微电子(苏州)有限公司 Voltage detection method and circuit
CN117134012A (en) * 2023-10-26 2023-11-28 河南锂动电源有限公司 Fault self-detection lithium battery
CN117134012B (en) * 2023-10-26 2024-01-16 河南锂动电源有限公司 Fault self-detection lithium battery

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