[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2023197056A1 - Method of activating battery - Google Patents

Method of activating battery Download PDF

Info

Publication number
WO2023197056A1
WO2023197056A1 PCT/CA2022/050579 CA2022050579W WO2023197056A1 WO 2023197056 A1 WO2023197056 A1 WO 2023197056A1 CA 2022050579 W CA2022050579 W CA 2022050579W WO 2023197056 A1 WO2023197056 A1 WO 2023197056A1
Authority
WO
WIPO (PCT)
Prior art keywords
charge
battery
charging
activating
negative electrode
Prior art date
Application number
PCT/CA2022/050579
Other languages
French (fr)
Inventor
Daniel Lin
Kai-Yi Chang
Original Assignee
Spheretech Research Corp.
HSU, David Tien-wei
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 Spheretech Research Corp., HSU, David Tien-wei filed Critical Spheretech Research Corp.
Priority to PCT/CA2022/050579 priority Critical patent/WO2023197056A1/en
Publication of WO2023197056A1 publication Critical patent/WO2023197056A1/en

Links

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
    • H01M10/446—Initial charging measures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134—Electrodes based on metals, Si or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes

Definitions

  • the present disclosure relates to a method of activating a battery, and in particular to a method of activating a battery by repeatedly charging and discharging.
  • the first method is to coat a surface of the pure silicon negative electrode with a layer of lithium ions, the thickness of which is about 5 to 10 microns.
  • the second method is to open the battery after it has been activated, replenish a lithium-ion- containing liquid, and then encapsulate it again.
  • the present disclosure provides a method of activating a battery, thereby reducing the irreversible capacity loss caused by the use of pure silicon as the negative electrode of the battery in the activation process.
  • the disclosure provides a method of activating a battery, comprising: (A) placing a battery comprising a pure silicon negative electrode into a charge and discharge machine; and (B) repeatedly charging and discharging the battery 5 to 60 times, wherein a first charge is charging the battery to 5% to 80% of the capacity thereof, and the charging amount of each charge from a second charge is the same as the previous charge, or is increased by 1% to 100% compared with the previous charge, until the charge has reached an upper limit voltage of the battery.
  • the first charge in step (B) may charge the battery to 35% of the capacity thereof.
  • the charging amount of each charge from the second charge in step (B) is the same as the previous charge, or is increased by 5% to 40% compared with the previous charge.
  • the method of activating the battery of the present disclosure activates the battery comprising a pure silicon negative electrode in a step charging and discharging manner with a small power, which can effectively reduce the irreversible capacity loss caused during the activation process.
  • FIG. 1 is a flow chart of a method of activating a battery of the present disclosure.
  • FIG. 2 is the activation charging conditions of Example 1 and Comparative example 1.
  • FIG. 3 is the charge and discharge curve of the activation process of Comparative example 2.
  • FIG. 4 shows the test results of the 0.5C discharge capacity performance of an activated battery in Example 1 and Comparative example 1.
  • FIG. 5 shows the test results of the voltage change of the activated lithium battery in several charge and discharge cycles of Example 1 and Comparative example 2.
  • a method of activating a battery of the present disclosure comprises: (A) placing a battery comprising a pure silicon negative electrode into a charge and discharge machine, SI 01; and (B) repeatedly charging and discharging the battery 5 to 60 times, wherein a first charge is charging the battery to 5% to 80% of the capacity thereof, and the charging amount of each charge from a second charge is the same as the previous charge, or is increased by 1% to 100% compared with the previous charge, until the charge has reached an upper limit voltage of the battery, SI 02.
  • Example 1 is to activate the battery in accordance with the method of activating the battery shown in FIG. 1.
  • step (A) of Example 1 is placing a lithium battery comprising a pure silicon negative electrode into a charge and discharge machine, wherein an activating thickness of the pure silicon negative electrode is 22 to 30 microns, an activating area is 2.2 cm * 11.6 cm.
  • step (B) of Example 1 are shown in FIG. 2.
  • Example 1 As shown in FIG. 2, in Example 1, the battery is repeatedly charged and discharged 55 times, but the present disclosure is not limited thereto, the number of repeated charge and discharge may be 5 to 60 times.
  • Example 1 As shown in FIG. 2, in Example 1, a first charge in the repeated charge and discharge is charging the battery to 35% of the capacity thereof, but the present disclosure is not limited thereto, the first charge in the repeated charge and discharge may charge the battery to 5% to 80% of the capacity thereof.
  • the charging amount of per charge from the second charge may be the same as the previous charge, i.e., the charging amount is not increased.
  • the second to twentieth charges of Example 1 maintains the same charging amount.
  • the charging amount of a single charge may be increased by 40%, 20% or 5% compared with the previous charge, which is between 1% and 100%.
  • the twenty-first charge of Example 1 increases the charging amount by 40% compared to the twentieth charge
  • the twenty-sixth charge increases the charging amount by 20% compared with the twenty-fifth charge
  • the fifty-first charge increases the charging amount by 5% compared to the fiftieth charge.
  • Comparative example 1 takes the same lithium battery comprising a pure silicon negative electrode as Example 1, and is activated in a traditional manner, wherein the activating thickness of the pure silicon negative electrode is 22 to 30 microns, and the activating area is 2.2 cm x 11.6 cm. [0025] More specifically, the activation charging conditions of step (B) of
  • Comparative example 1 are shown in FIG. 2.
  • the twenty-third charge of Comparative example 1 increases the charging amount by 200% compared to the previous charge (twenty second charge).
  • Comparative example 2 takes a lithium battery comprising a graphite negative electrode, and is activated in a traditional manner, wherein the activating thickness of the graphite negative electrode is 120 microns, and the activating area is 2.2 cm x 11.6 cm.
  • the lithium battery of Comparative example 2 uses lithium cobalt oxide (LiCoCh) as the positive electrode material, and the charge and discharge curve of the activation process is shown in FIG. 3. As shown in FIG. 3, the activation process of the lithium battery in Comparative example 2 is set to 0.2C charging to 4.2V at constant current and constant voltage, discharging to 2.5V at constant current, a total of three cycles.
  • LiCoCh lithium cobalt oxide
  • Test example 1 respectively tests the 0.5C discharge capacity performance of an activated lithium battery in Example 1 and Comparative example 1, and the results are shown in FIG. 4.
  • the activated lithium battery of Example 1 has not attenuated in the volumetric energy density after undergoing several cycles, in comparison, the activated lithium battery of Comparative example 1 has undergone a significant attenuation trend in the volumetric energy density after undergoing 5 cycles. It can be seen that the method of activating the battery of the present disclosure may effectively improve the attenuation of the volumetric energy density with the number of cyclic charge and discharge.
  • Test example 2 respectively tests the voltage change of the activated lithium battery in several charge and discharge cycles of Example 1 and Comparative example 2, and the results are shown in FIG. 5. [0035] As can be seen from FIG. 5, compared with the activated lithium battery of
  • the activated lithium battery of Example 1 has the activating thickness only 1/4 of that of Comparative example 2, but in close proximity to 4V voltage, the activated lithium battery of Example 1 can reach a capacity exceeding the normal operating voltage 4.2V of the activated lithium battery of Comparative example 2. It can be seen that in the activation process of the activated lithium battery of Example 1, the loss of lithium ions are much lower than the lithium battery comprising a graphite negative electrode activated by the traditional manner (Comparative example 2), the activated lithium battery of Example 1 can obtain more capacity in the same area.
  • the method of activating the battery of the present disclosure activates the battery comprising a pure silicon negative electrode in a step charging and discharging manner with a small power
  • the expansion amount of the pure silicon electrode in the activation process can be controlled within 10% to 20%, greatly reducing the area of the fracture surface generated during the activation process, which can effectively reduce the irreversible capacity loss caused during the activation process.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The disclosure provides a method of activating a battery, comprising: (A) placing a battery comprising a pure silicon negative electrode into a charge and discharge machine; and (B) repeatedly charging and discharging the battery 5 to 60 times, wherein a first charge is charging the battery to 5% to 80% of the capacity thereof, and the charging amount of each charge from a second charge is the same as the previous charge, or is increased by 1% to 100% compared with the previous charge, until the charge has reached an upper limit voltage of the battery.

Description

METHOD OF ACTIVATING BATTERY
BACKGROUND OF THE INVENTION
1. Field of the Invention [0001] The present disclosure relates to a method of activating a battery, and in particular to a method of activating a battery by repeatedly charging and discharging.
2. Description of the Related Art [0002] Recently, the application of batteries using pure silicon as a negative electrode (e.g., lithium batteries) has attracted more and more attention, but in related industries, it has not been possible to achieve a considerable mass production scale, partly because of the increase in production costs. In addition, when the pure silicon negative electrode is activated in the battery, an irreversible capacity loss occurs, and the lost capacity can reach 20% to 40% of the capacity before activation, and the lost capacity will not be restored in the subsequent cyclic charge and discharge.
[0003] Traditionally, for lithium batteries that use pure silicon as the negative electrode, two ways are used to supplement the consumed lithium ions to compensate for the loss of the above-mentioned irreversible capacity. Among them, the first method is to coat a surface of the pure silicon negative electrode with a layer of lithium ions, the thickness of which is about 5 to 10 microns. The second method is to open the battery after it has been activated, replenish a lithium-ion- containing liquid, and then encapsulate it again.
BRIEF SUMMARY OF THE INVENTION
[0004] In view of the disadvantages of a traditional battery using pure silicon as a negative electrode, the present disclosure provides a method of activating a battery, thereby reducing the irreversible capacity loss caused by the use of pure silicon as the negative electrode of the battery in the activation process.
[0005] To achieve the above object and other objects, the disclosure provides a method of activating a battery, comprising: (A) placing a battery comprising a pure silicon negative electrode into a charge and discharge machine; and (B) repeatedly charging and discharging the battery 5 to 60 times, wherein a first charge is charging the battery to 5% to 80% of the capacity thereof, and the charging amount of each charge from a second charge is the same as the previous charge, or is increased by 1% to 100% compared with the previous charge, until the charge has reached an upper limit voltage of the battery.
[0006] In the above-mentioned method, the first charge in step (B) may charge the battery to 35% of the capacity thereof. [0007] In the above-mentioned method, the charging amount of each charge from the second charge in step (B) is the same as the previous charge, or is increased by 5% to 40% compared with the previous charge.
[0008] The method of activating the battery of the present disclosure activates the battery comprising a pure silicon negative electrode in a step charging and discharging manner with a small power, which can effectively reduce the irreversible capacity loss caused during the activation process.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] For ease of description and clarity, the thickness or dimensions of each layer in the drawings are enlarged, omitted, or schematically outlined. At the same time, the dimensions of each element do not fully reflect their true dimensions.
[0010] FIG. 1 is a flow chart of a method of activating a battery of the present disclosure. [0011] FIG. 2 is the activation charging conditions of Example 1 and Comparative example 1.
[0012] FIG. 3 is the charge and discharge curve of the activation process of Comparative example 2. [0013] FIG. 4 shows the test results of the 0.5C discharge capacity performance of an activated battery in Example 1 and Comparative example 1.
[0014] FIG. 5 shows the test results of the voltage change of the activated lithium battery in several charge and discharge cycles of Example 1 and Comparative example 2.
DETAILED DESCRIPTION OF THE INVETION
[0015] As shown in FIG. 1, a method of activating a battery of the present disclosure comprises: (A) placing a battery comprising a pure silicon negative electrode into a charge and discharge machine, SI 01; and (B) repeatedly charging and discharging the battery 5 to 60 times, wherein a first charge is charging the battery to 5% to 80% of the capacity thereof, and the charging amount of each charge from a second charge is the same as the previous charge, or is increased by 1% to 100% compared with the previous charge, until the charge has reached an upper limit voltage of the battery, SI 02.
[0016] Example 1 :
[0017] Example 1 is to activate the battery in accordance with the method of activating the battery shown in FIG. 1. [0018] More specifically, step (A) of Example 1 is placing a lithium battery comprising a pure silicon negative electrode into a charge and discharge machine, wherein an activating thickness of the pure silicon negative electrode is 22 to 30 microns, an activating area is 2.2 cm * 11.6 cm.
[0019] More specifically, the activation charging conditions of step (B) of Example 1 are shown in FIG. 2.
[0020] As shown in FIG. 2, in Example 1, the battery is repeatedly charged and discharged 55 times, but the present disclosure is not limited thereto, the number of repeated charge and discharge may be 5 to 60 times.
[0021] As shown in FIG. 2, in Example 1, a first charge in the repeated charge and discharge is charging the battery to 35% of the capacity thereof, but the present disclosure is not limited thereto, the first charge in the repeated charge and discharge may charge the battery to 5% to 80% of the capacity thereof.
[0022] The charging amount of per charge from the second charge may be the same as the previous charge, i.e., the charging amount is not increased. For example, as shown in FIG. 2, the second to twentieth charges of Example 1 maintains the same charging amount. Alternatively, for example, the charging amount of a single charge may be increased by 40%, 20% or 5% compared with the previous charge, which is between 1% and 100%. For example, as shown in FIG. 2, the twenty-first charge of Example 1 increases the charging amount by 40% compared to the twentieth charge, the twenty-sixth charge increases the charging amount by 20% compared with the twenty-fifth charge, and the fifty-first charge increases the charging amount by 5% compared to the fiftieth charge. [0023] Comparative example 1
[0024] Comparative example 1 takes the same lithium battery comprising a pure silicon negative electrode as Example 1, and is activated in a traditional manner, wherein the activating thickness of the pure silicon negative electrode is 22 to 30 microns, and the activating area is 2.2 cm x 11.6 cm. [0025] More specifically, the activation charging conditions of step (B) of
Comparative example 1 are shown in FIG. 2.
[0026] As shown in FIG. 2, the twenty-third charge of Comparative example 1 increases the charging amount by 200% compared to the previous charge (twenty second charge).
[0027] Comparative example 2
[0028] Comparative example 2 takes a lithium battery comprising a graphite negative electrode, and is activated in a traditional manner, wherein the activating thickness of the graphite negative electrode is 120 microns, and the activating area is 2.2 cm x 11.6 cm.
[0029] The lithium battery of Comparative example 2 uses lithium cobalt oxide (LiCoCh) as the positive electrode material, and the charge and discharge curve of the activation process is shown in FIG. 3. As shown in FIG. 3, the activation process of the lithium battery in Comparative example 2 is set to 0.2C charging to 4.2V at constant current and constant voltage, discharging to 2.5V at constant current, a total of three cycles.
[0030] Test example 1
[0031] Test example 1 respectively tests the 0.5C discharge capacity performance of an activated lithium battery in Example 1 and Comparative example 1, and the results are shown in FIG. 4.
[0032] As shown in FIG. 4, the activated lithium battery of Example 1 has not attenuated in the volumetric energy density after undergoing several cycles, in comparison, the activated lithium battery of Comparative example 1 has undergone a significant attenuation trend in the volumetric energy density after undergoing 5 cycles. It can be seen that the method of activating the battery of the present disclosure may effectively improve the attenuation of the volumetric energy density with the number of cyclic charge and discharge.
[0033] Test example 2
[0034] Test example 2 respectively tests the voltage change of the activated lithium battery in several charge and discharge cycles of Example 1 and Comparative example 2, and the results are shown in FIG. 5. [0035] As can be seen from FIG. 5, compared with the activated lithium battery of
Comparative example 2, the activated lithium battery of Example 1 has the activating thickness only 1/4 of that of Comparative example 2, but in close proximity to 4V voltage, the activated lithium battery of Example 1 can reach a capacity exceeding the normal operating voltage 4.2V of the activated lithium battery of Comparative example 2. It can be seen that in the activation process of the activated lithium battery of Example 1, the loss of lithium ions are much lower than the lithium battery comprising a graphite negative electrode activated by the traditional manner (Comparative example 2), the activated lithium battery of Example 1 can obtain more capacity in the same area.
[0036] In summary, the method of activating the battery of the present disclosure activates the battery comprising a pure silicon negative electrode in a step charging and discharging manner with a small power, the expansion amount of the pure silicon electrode in the activation process can be controlled within 10% to 20%, greatly reducing the area of the fracture surface generated during the activation process, which can effectively reduce the irreversible capacity loss caused during the activation process.
[0037] The above embodiments of the disclosure made only by way of example to describe the feature and effect of the disclosure, and it should not be considered as the scope of substantial technical content is limited thereby. Various possible modifications and alternations of the embodiments could be carried out by the those of ordinary skill in the art without departing from the spirit and scope of the disclosure. Therefore, the scope of the disclosure is based on the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A method of activating a battery, comprising:
(A) placing a battery comprising a pure silicon negative electrode into a charge and discharge machine; and (B) repeatedly charging and discharging the battery 5 to 60 times, wherein a first charge is charging the battery to 5% to 80% of the capacity thereof, and the charging amount of each charge from a second charge is the same as the previous charge, or is increased by 1% to 100% compared with the previous charge, until the charge has reached an upper limit voltage of the battery.
2. The method according to claim 1, wherein the first charge in step (B) is charging the battery to 35% of the capacity thereof.
3. The method according to claim 1, wherein the charging amount of each charge from the second charge in step (B) is the same as the previous charge, or is increased by 5% to 40% compared with the previous charge.
PCT/CA2022/050579 2022-04-14 2022-04-14 Method of activating battery WO2023197056A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CA2022/050579 WO2023197056A1 (en) 2022-04-14 2022-04-14 Method of activating battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA2022/050579 WO2023197056A1 (en) 2022-04-14 2022-04-14 Method of activating battery

Publications (1)

Publication Number Publication Date
WO2023197056A1 true WO2023197056A1 (en) 2023-10-19

Family

ID=88328513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2022/050579 WO2023197056A1 (en) 2022-04-14 2022-04-14 Method of activating battery

Country Status (1)

Country Link
WO (1) WO2023197056A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6377030B1 (en) * 1998-07-31 2002-04-23 Canon Kabushiki Kaisha Method of charging secondary battery by varying current or voltage at an inflection point in a storage region before full charge and device therefor
US20080311464A1 (en) * 2005-10-13 2008-12-18 Krause Larry J Method of Using an Electrochemical Cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6377030B1 (en) * 1998-07-31 2002-04-23 Canon Kabushiki Kaisha Method of charging secondary battery by varying current or voltage at an inflection point in a storage region before full charge and device therefor
US20080311464A1 (en) * 2005-10-13 2008-12-18 Krause Larry J Method of Using an Electrochemical Cell

Similar Documents

Publication Publication Date Title
JP2024153648A (en) Multiplexed Charge/Discharge Battery Management System
WO2002047185A2 (en) Improved electrodes for lithium batteries
CN111384456A (en) Pre-charging formation method of lithium ion battery and lithium ion battery
CN108400396B (en) Method for improving first charge-discharge specific capacity and first effect of lithium ion battery
JP7192755B2 (en) Manufacturing method of lithium ion battery
JP2002313412A (en) Method of activating secondary battery
Zhang et al. Effects of pressure evolution on the decrease in the capacity of lithium-ion batteries
WO2023197056A1 (en) Method of activating battery
CN114744301A (en) Active lithium excitation method of lithium battery with supplemented lithium pole piece and application
Ibrahim et al. Parameters observation of restoration capacity of industrial lead acid battery using high current pulses
WO2024040996A1 (en) Charging and discharging management method
CN109713386B (en) Formation method of hard carbon negative electrode material lithium ion battery
CN112490524A (en) Formation method of soft package lithium ion battery and soft package lithium ion battery
WO2017052189A9 (en) Method for controlling operation of chemical flow battery
JPS5894770A (en) Leakage-less closed type lead battery
TW202341563A (en) Method for activating battery by repeatedly charging and discharging the battery
CN112946502B (en) Method for rapidly testing cycle life of lithium ion battery
CN112271289A (en) High-first-efficiency pre-lithiated silicon monoxide negative electrode material and preparation method and application thereof
Calasanzio et al. Charging of valve-regulated lead/acid batteries under deep cycling applications
CN112946500A (en) Method for rapidly testing cycle life of lithium ion battery
CN110112812A (en) Battery module active equalization method and system, control device and storage medium
WO2024119652A1 (en) Solid-state battery system, and control method for solid-state battery system
CN115036461B (en) Battery and power consumption device
WO2023184339A1 (en) Electrochemical apparatus and control method therefor, and electrochemical apparatus management system, electronic device and medium
Ota et al. Modeling of voltage hysteresis and relaxation of HEV NiMH battery

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22936745

Country of ref document: EP

Kind code of ref document: A1