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WO2018058315A1 - Procédé et appareil permettant la détermination d'hystérésis de tension et l'activation d'une batterie au lithium-chlorure de thionyle - Google Patents

Procédé et appareil permettant la détermination d'hystérésis de tension et l'activation d'une batterie au lithium-chlorure de thionyle Download PDF

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Publication number
WO2018058315A1
WO2018058315A1 PCT/CN2016/100374 CN2016100374W WO2018058315A1 WO 2018058315 A1 WO2018058315 A1 WO 2018058315A1 CN 2016100374 W CN2016100374 W CN 2016100374W WO 2018058315 A1 WO2018058315 A1 WO 2018058315A1
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WO
WIPO (PCT)
Prior art keywords
activation
battery
voltage
current
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/100374
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English (en)
Chinese (zh)
Inventor
李向锋
张玉清
陈美淋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Star Instrument Co Ltd
Original Assignee
Shenzhen Star Instrument Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Star Instrument Co Ltd filed Critical Shenzhen Star Instrument Co Ltd
Priority to PCT/CN2016/100374 priority Critical patent/WO2018058315A1/fr
Publication of WO2018058315A1 publication Critical patent/WO2018058315A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01M10/44—Methods for charging or discharging
    • 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

Definitions

  • the present invention relates to the field of voltage determination and activation of lithium batteries, and more particularly to a method and apparatus for determining and activating voltage hysteresis of a lithium thionyl chloride battery.
  • Voltage hysteresis is a major characteristic of lithium thionyl chloride batteries, and it is also the basis of the existence of such batteries.
  • the principle is as follows:
  • the thionyl chloride electrolyte constituting the battery is a strong oxidizing chemical, which rises with it.
  • a dense passivation film is formed on the surface of the metal lithium. This passivation film is an ion.
  • the conductor, lithium ions can migrate in the passivation film, and the rate at which lithium ions migrate in the passivation film is small, thus blocking the battery from reacting.
  • the migration rate of lithium ions in the passivation film can meet the requirements; when the current is large, the limitation of the migration rate of lithium ions in the passivation film is severe. The effect is that a large voltage drop occurs across the passivation film.
  • the specific performance of the passivation film is the battery load voltage. As the current continues to flow, the passivation film gradually ruptures, and the voltage drop across the gradual drop, the load voltage of the battery. It gradually rises to normal. The gradual rupture process of the passivation film is the elimination process of the battery voltage lag.
  • the passivation film of the battery When the battery is in a small current discharge or storage condition, the passivation film of the battery will gradually thicken, and the voltage hysteresis of the battery will be aggravated. Indeed, the voltage will drop to 2 V or even more. Affect the user's use. If no measures are taken on the circuit, the instrument will not work properly due to the transient voltage being too high.
  • the method for eliminating the voltage hysteresis of lithium thionyl chloride battery is generally to use a large current between short turns to discharge the lithium thionyl chloride battery.
  • the advantage of this scheme is that it is not necessary to judge whether the battery has voltage lag or not. Activation; the downside is that frequent high current discharge activation accelerates battery consumption and affects battery life.
  • the present invention proposes a voltage hysteresis of a lithium thionyl chloride battery in which a lithium thionyl chloride battery is judged to have a voltage hysteresis, and a lithium thionyl chloride battery is activated according to the judgment result. Decision and activation methods and devices.
  • a voltage hysteresis determination and activation method for a lithium thionyl chloride battery comprising the steps of: Sl, determining whether there is a last activation time, and if so, performing step S2; if not, performing step S3; S2, determining the last time Whether the inter-turn interval between the activation time and the current time reaches the preset collection time, if yes, go to step S3, if not, continue with this step; S3, collect the current battery voltage, and then determine the system operation time, and from the experience Reading the empirical value of the voltage corresponding to the running time of the system, and determining whether the current battery voltage is less than the voltage empirical value, and if yes, performing step S4, if not, returning to step S1, wherein the experience table records Correspondence between the system running time and the battery experience value; S4. Using a small current discharge circuit to activate the activation operation in the battery.
  • a voltage hysteresis determination and activation device for a lithium thionyl chloride battery comprising a control device and a small current discharge circuit, the control device being electrically connected to the small current discharge circuit, the small current discharge circuit and the lithium thionyl chloride battery
  • the control device includes a first determining module, a second determining module, a voltage collecting module, a voltage experience value acquiring module, a third determining module, and an activation module, where the first determining module is configured to determine whether there is a last activation.
  • the second determining module is configured to determine whether the inter-turn interval between the last active time and the current time reaches a preset collection time when there is a last activation time; the voltage collecting module is used for The second judgment module determines that the result is ⁇ , and collects the current battery voltage; the voltage empirical value acquisition module is configured to determine the system operation time after the voltage collection module collects the battery voltage, and read from the experience table.
  • the system operates a corresponding voltage empirical value between the turns, wherein the experience table records the system running time and electricity Corresponding relationship of the experience value; the third determining module is configured to determine whether the current battery voltage is less than the voltage empirical value; the activation module is configured to use the small current discharging circuit to the battery when the third determining module determines that the result is ⁇ Perform the activation operation in the preset activation time.
  • the beneficial effects of the present invention are as follows:
  • the present invention collects the voltage of the lithium thionyl chloride battery, and compares the collected battery voltage with the lithium thionyl chloride battery, and the voltage of the current month in the corresponding voltage value empirical table. The values are compared to determine whether the battery has a voltage hysteresis, and the battery is activated only when there is a voltage hysteresis, thereby effectively preventing unnecessary consumption; further, the present invention determines the current voltage acquisition and the previous activation period. Whether the interval between the two turns is exceeded, and the lithium thionyl chloride battery is activated only when the two activated turns exceed a certain inter-turn interval. Further, the present invention uses a small electric power. The flow activates the lithium thionyl chloride battery, effectively preventing the damage of the battery caused by the large current activation, and ensuring the service life of the battery.
  • FIG. 1 is a block diagram showing the structure of a voltage hysteresis determination and activation device for a lithium thionyl chloride battery according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing a method for determining and activating a voltage hysteresis of a lithium thionyl chloride battery according to an embodiment of the present invention
  • FIG. 4 is a circuit diagram of a small current discharge circuit according to an embodiment of the present invention.
  • Control device-1 first determination module-10; second determination module-20; voltage acquisition module -30; voltage empirical value acquisition module-40; third determination module-50; activation module -60; Discharge circuit -70; lithium thionyl chloride battery -80.
  • a lithium thionyl chloride battery is used in the enthalpy and the corresponding voltage value empirical table, and the lithium thionyl chloride battery can be inquired through the use of the enthalpy.
  • 80 is the voltage value under normal conditions (without voltage hysteresis), so it can be judged whether there is voltage hysteresis in the battery according to the use of the diurnal and corresponding voltage value empirical table and the voltage of the lithium thionyl chloride battery 80.
  • FIG. 1 is a structural block diagram of a voltage hysteresis determination and activation device for a lithium thionyl chloride battery according to an embodiment of the present invention.
  • the voltage hysteresis determination and activation device of the lithium thionyl chloride battery includes a control device 1 and a small current discharge circuit 70, the control device 1 is electrically connected to the small current discharge circuit 70, and the small current discharge circuit 70 and lithium thionyl chloride
  • the battery device 80 is electrically connected.
  • the control device 1 includes a first determining module 10, a second determining module 20, a voltage collecting module 30, a voltage experience value acquiring module 40, a third determining module 50, and an activating module 60.
  • the first determining module 10 is configured to determine whether there is a last activation time;
  • the second judging module 20 is configured to determine whether the inter-time interval between the last activation time and the current time reaches the preset collection time when there is a last activation time;
  • the voltage collecting module 30 is configured to: when the second determining module determines that the result is ⁇ , collect the current battery voltage;
  • the voltage empirical value acquisition module 40 is configured to determine a system operation time after the voltage collection module collects the battery voltage, and read an empirical value of the voltage corresponding to the operation time of the system from the experience table, Wherein, the experience table describes the correspondence between the system operation time and the battery experience value;
  • the third determining module 50 is configured to determine whether the current battery voltage is less than a voltage experience value
  • the activation module 60 is configured to use a small current discharge circuit to perform an activation operation in the preset activation period of the battery when the determination result of the third determination module is ⁇ .
  • the small current discharge circuit includes a resistor R28, a PNP type transistor Q13, and a capacitor C9.
  • the base of the transistor Q13 is electrically connected to the resistor R28, and is emitted.
  • the pole is connected to the +5V power supply, the collector is connected to the positive pole of the capacitor C9, the other end of the resistor R28 is connected to the control device, and the cathode of the capacitor C9 is connected to the ground.
  • the resistor R28 is a resistance of about 1000 ohms. When it is determined that there is a voltage hysteresis in the lithium thionyl chloride battery, the input terminal of the resistor R28 is at a level of ⁇ , thereby activating the discharge circuit.
  • the preset collection time is preferably 7 days, that is, when the interval between the last activation to the current time reaches 7 days, the judgment result of the second judgment module is In other embodiments, the preset collection time is 6 to 8 days.
  • the voltage of the lithium thionyl chloride battery can be set to be the frequency of the lithium thionyl chloride battery when the lithium subsulfide battery is exposed to a small current for a long period of time or storage. Otaru collects once.
  • the present invention compares the voltage of the lithium thionyl chloride battery, compares the collected battery voltage with the lithium thionyl chloride battery, and compares the voltage value of the current month in the corresponding voltage value empirical table to determine whether the battery is There is a voltage hysteresis, and the battery is activated only when there is a voltage hysteresis, thereby effectively preventing Unnecessary consumption; further, the present invention determines whether the inter-turn interval between the last activation time and the current time reaches the preset acquisition time, only when the two-time interval between the two activations reaches the preset collection time.
  • the lithium thionyl chloride battery is activated. Further, the invention uses a small current discharge circuit to activate a small current of the lithium thionyl chloride battery, effectively preventing the damage of the battery by the large current activation, and ensuring the service life of the battery.
  • the activation module 60 includes a voltage difference calculation unit;
  • the voltage difference calculation unit is configured to calculate a difference between the voltage experience value and the current battery voltage
  • the activation module 60 is configured to read an activation current corresponding to the difference from an activation table, where the activation table is used to record a correspondence between the difference and the activation current;
  • the activation module 60 is configured to apply the activation current to the battery within the preset activation period using a small current discharge circuit.
  • the activation current ranges from 2 mA to 4 mA, which is proportional to the voltage difference, as shown in Table 1, which is an activation table of the activation current corresponding to the difference in the embodiment;
  • the activation module 60 controls the small current discharge circuit to generate different activation currents by generating pulse signals of different duty ratios.
  • the activation module 60 in the embodiment further includes a capacity detecting unit;
  • the capacity detecting unit is configured to detect a capacity of the battery, and read a preset activation time corresponding to the battery capacity from an active time table.
  • the preset activation time is 8 to 12 minutes, which is proportional to the battery capacity.
  • the activation module 60 further includes a current control module. ;
  • the current control module is configured to control the magnitude of the activation current of the small current discharge circuit to be inversely proportional to the daytime of the activation, that is, the magnitude of the activation current is gradually decreased as the activation progresses.
  • an embodiment of the present invention further provides a voltage hysteresis determination and activation method for a lithium thionyl chloride battery, including the steps of:
  • step S2 determining whether there is a last activation time, and if so, performing step S2, if not, executing step S3;
  • step S3 determining whether the inter-time interval between the last activation to the current time reaches the preset collection time, and if yes, executing step S3, if not, continuing the step;
  • step S1 collecting the current battery voltage, then determining the system operation time, and reading the empirical value of the voltage corresponding to the running time of the system from the experience table, and determining whether the current battery voltage is less than the voltage empirical value, and if so, performing steps S4, if no, returning to step S1, wherein the experience table records the correspondence between the system operation time and the battery experience value;
  • the battery is subjected to an activation operation within a preset activation period using a small current discharge circuit.
  • step S4 specifically includes the following steps:
  • activation current ranges from 2 mA to 4 mA.
  • the method further comprises the steps of: [0056] detecting the capacity of the battery, and reading a preset activation time corresponding to the battery capacity from an active time table
  • step S5 wherein the magnitude of the activation current in step S5 is inversely proportional to the time of the current activation.
  • the present invention collects the voltage of the lithium thionyl chloride battery, and compares the collected battery voltage with the lithium thionyl chloride battery and the voltage value of the current month in the corresponding voltage value empirical table. In comparison, it is judged whether there is a voltage hysteresis in the battery, and the battery is activated only when there is a voltage hysteresis, thereby effectively preventing unnecessary consumption; further, the present invention determines whether the current voltage acquisition and the previous activation time exceed The lithium thionyl chloride battery is activated only when the two activated turns exceed a certain inter-turn interval. Further, the present invention uses a small current to activate the lithium thionyl chloride battery, effectively preventing large The current activates the damage to the battery and ensures the battery life.
  • the present invention calculates a voltage difference between the current month battery voltage value of the lithium sulfite battery and the collected lithium thionyl chloride battery voltage, and uses different currents for the lithium thionyl chloride battery according to the voltage difference. The value is activated to effectively increase the efficiency of the activation during the protection of the battery.
  • the present invention detects the capacity of the lithium thionyl chloride battery, and activates the lithium thionyl chloride battery according to the difference in capacity, thereby protecting the battery from being ensured under the premise that the battery is fully activated. Excessive activation and damage.
  • the activation current of the present invention gradually decreases as the activation progresses, thereby avoiding damage to the battery caused by a large activation current of the battery at the end of the activation period while ensuring the activation of the inter-turn efficiency.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Primary Cells (AREA)

Abstract

La présente invention concerne un procédé et un appareil pour la détermination et l'activation d'hystérésis de tension d'une batterie au lithium-chlorure de thionyle. Le procédé consiste : à déterminer si une hystérésis de tension se produit dans une batterie au lithium-chlorure de thionyle ; et si une hystérésis de tension se produit et qu'une période de temps pour deux activations d'hystérésis de tension adjacentes dépasse un certain intervalle, à effectuer une activation de décharge de faible courant sur la batterie au lithium-chlorure de thionyle au moyen d'un petit circuit de décharge de courant. Comme la batterie n'est activée que lorsque l'hystérésis de tension se produit et qu'une période de temps pour deux activations dépasse un certain intervalle de temps, une consommation de batterie inutile est efficacement empêchée ; en outre, en raison de l'utilisation d'un faible courant pour activer la batterie, une forte activation de courant est efficacement empêchée et ne peut endommager la batterie, et la durée de vie de la batterie est garantie.
PCT/CN2016/100374 2016-09-27 2016-09-27 Procédé et appareil permettant la détermination d'hystérésis de tension et l'activation d'une batterie au lithium-chlorure de thionyle Ceased WO2018058315A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/100374 WO2018058315A1 (fr) 2016-09-27 2016-09-27 Procédé et appareil permettant la détermination d'hystérésis de tension et l'activation d'une batterie au lithium-chlorure de thionyle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/100374 WO2018058315A1 (fr) 2016-09-27 2016-09-27 Procédé et appareil permettant la détermination d'hystérésis de tension et l'activation d'une batterie au lithium-chlorure de thionyle

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WO2018058315A1 true WO2018058315A1 (fr) 2018-04-05

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201038224Y (zh) * 2007-04-25 2008-03-19 武汉孚特电子科技有限公司 一种带改善电压滞后部件的9v锂亚硫酰氯电池
CN201100864Y (zh) * 2007-11-30 2008-08-13 成都建中锂电池有限公司 锂电池激活检测表
WO2011091521A1 (fr) * 2010-01-28 2011-08-04 Phostech Lithium Inc. Procédé permettant de réduire l'activation d'une batterie au lithium rechargeable et batterie au lithium rechargeable ayant une activation réduite
CN103700902A (zh) * 2014-01-14 2014-04-02 深圳市思达仪表有限公司 一种锂亚硫酰氯电池的电压滞后判定及激活方法与装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201038224Y (zh) * 2007-04-25 2008-03-19 武汉孚特电子科技有限公司 一种带改善电压滞后部件的9v锂亚硫酰氯电池
CN201100864Y (zh) * 2007-11-30 2008-08-13 成都建中锂电池有限公司 锂电池激活检测表
WO2011091521A1 (fr) * 2010-01-28 2011-08-04 Phostech Lithium Inc. Procédé permettant de réduire l'activation d'une batterie au lithium rechargeable et batterie au lithium rechargeable ayant une activation réduite
CN103700902A (zh) * 2014-01-14 2014-04-02 深圳市思达仪表有限公司 一种锂亚硫酰氯电池的电压滞后判定及激活方法与装置

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