AU2020202737B1 - Method for repairing decommissioned battery module - Google Patents
Method for repairing decommissioned battery module Download PDFInfo
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- AU2020202737B1 AU2020202737B1 AU2020202737A AU2020202737A AU2020202737B1 AU 2020202737 B1 AU2020202737 B1 AU 2020202737B1 AU 2020202737 A AU2020202737 A AU 2020202737A AU 2020202737 A AU2020202737 A AU 2020202737A AU 2020202737 B1 AU2020202737 B1 AU 2020202737B1
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- battery module
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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
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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
- H01M10/44—Methods for charging or discharging
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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
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The disclosure discloses a method for repairing a decommissioned battery module,
including the following steps of: charging the decommissioned battery module to an upper-limit
voltage; releasing parallel connection of a plurality of single-string batteries in the
decommissioned battery module; standing the decommissioned battery module which is charged
to the upper-limit voltage for a preset time, and then respectively charging each of the
single-string batteries to the upper-limit voltage; discharging each of the single-string batteries to
a lower-limit voltage; and connecting the plurality of single-string batteries in parallel. When the
above method for repairing the decommissioned battery module is used to repair the
decommissioned battery module, an overall shape of the decommissioned battery module is
maintained without needing to disassemble the decommissioned battery module into a single
battery cell, and only the parallel connection among the plurality of single-string batteries is
released to repair each of the single-string batteries. Compared with a traditional method, the
above method for repairing the decommissioned battery module has a lower cost when repairing
the decommissioned battery module.
Description
[0001] The present disclosure relates to the field of repairing battery module performances, and more particularly, to a method for repairing a decommissioned battery module.
[0002] In recent years, the battery industry has also been expanded actively with the rapid development of the electric vehicle industry, and lithium ion battery technologies have become one of key technologies in an electric vehicle system at current. A service life and a cost of the battery serve as two key factors that restrict the development of an electric vehicle during the use of the lithium ion battery. A sales volume of the electric vehicles in China was 517,000 in 2016, and a market sales volume of the electric vehicles was expected to be about 700,000 in 2017. According to a five-year service life of the battery, China Automotive Technology and Research Center predicts that 322,000 tons of batteries will be cumulatively decommissioned by 2020 in China. With the promotion of new energy vehicles and the passage of time, a pressure on battery decommissioning and recycling will also become greater and greater.
[0003] A method for repairing the lithium ion battery may be used in a decommissioned battery module to repair performances of the battery, and the battery may be reused after repairing. However, a traditional method for repairing a decommissioned battery module is direct at a battery cell of a lithium ion battery monomer. In other words, the battery cell of the lithium ion battery monomer is repaired after the decommissioned battery module is disassembled into the battery cell of the lithium ion battery monomer, and then the battery cell of the lithium ion battery monomer is reassembled into the decommissioned battery module after the decommissioned battery module is repaired.
[0004] That is to say, the traditional method for repairing the decommissioned battery module wastes time and efforts, and has a relatively high cost when repairing the decommissioned battery module.
[0005] An object of the present disclosure is intended to provide a method for repairing a decommissioned battery module, which has a lower cost when repairing the decommissioned battery module.
[0006] A method for repairing a decommissioned battery module is provided, wherein the decommissioned battery module includes a plurality of single-string batteries connected in parallel, each of the single-string batteries is formed by connecting a plurality of battery monomers in series, and the method includes the following steps of:
[00071 charging the decommissioned battery module to an upper-limit voltage;
[0008] releasing parallel connection of the plurality of single-string batteries in the decommissioned battery module;
[0009] standing the decommissioned battery module which is charged to the upper-limit voltage for a preset time, and then respectively charging each of the single-string batteries to the upper-limit voltage;
[0010] discharging each of the single-string batteries to a lower-limit voltage; and
[0011] connecting the plurality of single-string batteries in parallel.
[0012] When the above method for repairing the decommissioned battery module is used to repair the decommissioned battery module, an overall shape of the decommissioned battery module is maintained without needing to disassemble the decommissioned battery module into a single battery cell, and only the parallel connection among the plurality of single-string batteries is released to repair each of the single-string batteries. Compared with a traditional method for repairing a decommissioned battery module, the above method for repairing the decommissioned battery module has a lower cost when repairing the decommissioned battery module.
[0013] In order to illustrate the technical solutions in the embodiments of the present disclosure or the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described hereinafter. Apparently, the drawings in the following description are merely some embodiments of the present disclosure. Those of ordinary skills in the art can also obtain other drawings according to these drawings without going through any creative work.
[0014] In the drawing:
[0015] FIG. 1 is a flow chart of a method for repairing a decommissioned battery module according to an embodiment.
[00161 The technical solutions in the embodiments of the present disclosure will be clearly and completely described hereinafter with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some but not all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skills in the art without going through any creative work shall belong to the scope of protection of the present disclosure.
[00171 As shown in FIG. 1, a method for repairing a decommissioned battery module according to an embodiment is used to repair the decommissioned battery module, and the method includes the following steps.
[00181 In S100, the decommissioned battery module is charged to an upper-limit voltage.
[0019] The decommissioned battery module includes a plurality of single-string batteries connected in parallel, and each of the single-string batteries is formed by connecting a plurality of battery monomers in series.
[0020] Specifically, the decommissioned battery module includes 3 to 20 single-string batteries connected in parallel. Each of the single-string batteries may be formed by connecting 3 to 20 battery monomers in series.
[0021] The upper-limit voltage is different according to different decommissioned battery modules. Generally, the upper-limit voltage of the battery monomer is 3.6 V to 4.2 V, while the upper-limit voltage of the decommissioned battery module is determined according to a number of the battery monomers actually connected in series.
[0022] In the embodiment, before the step S100, the method further includes discharging the decommissioned battery module to a lower-limit voltage at 23 0 C to 27C, and completely discharging the decommissioned battery module during working discharge of the decommissioned battery module at a normal temperature, so as to facilitate subsequent repairing process.
[0023] In S200, parallel connection of the plurality of single-string batteries in the decommissioned battery module is released.
[0024] Specifically, the S200 is: opening a case of the decommissioned battery module to expose positive and negative terminals of the plurality of single-string batteries, and then releasing the parallel connection of the plurality of single-string batteries in the decommissioned battery module.
[0025] In S300, the decommissioned battery module which is charged to the upper-limit voltage is stood for a preset time, and then each of the single-string batteries is respectively charged to the upper-limit voltage.
[0026] Generally, the upper-limit voltage of the battery monomer is 3.6 V to 4.2 V, while the upper-limit voltage of the single-string battery is determined according to the number of the battery monomers actually connected in series.
[00271 In the embodiment, the upper-limit voltage of the single-string battery is consistent with that of the decommissioned battery module because the plurality of single-string batteries are connected in parallel to form the decommissioned battery module.
[0028] Preferably, the preset time is 1 hour to 24 hours.
[0029] More preferably, the preset time is 1 hour to 2 hours.
[0030] In the embodiment, a cut-off current of the single-string battery is 0.02 C.
[0031] In the embodiment, a charging current of the single-string battery is 0.1 C to 0.5 C.
[0032] In a preferred embodiment, after the operation of respectively charging each of the single-string batteries to the upper-limit voltage, the S300 further includes performing the following operations of: standing the plurality of single-string batteries for the preset time, and respectively charging each of the single-string batteries to the upper-limit voltage again.
[0033] More preferably, the operations of standing the plurality of single-string batteries for the preset time, and respectively charging each of the single-string batteries to the upper-limit voltage again are repetitive operations that are repeated for 2 times to 10 times.
[0034] In the embodiment, the above steps of charging and standing are both performed at a constant temperature of 300 C to 600 C to repair a performance of the single-string battery, so that a SEI film on a negative electrode surface of the battery monomer in the single-string battery can be repaired more compactly, and the repaired battery monomer has a good consistency.
[0035] Preferably, the performance of the single-string battery is repaired at a high temperature of 45 0C to 60 0C, so that the SEI film on the negative electrode surface of the battery monomer in the single-string battery is repaired more uniformly and stably, and the repaired battery monomer has a better consistency.
[0036] In the embodiment, the preset time for standing is 1 hour to 24 hours. During standing, the single-string battery may be discharged slowly to a certain extent and then charged after standing. When the single-string battery is charged to the upper-limit voltage, an upper limit of a battery capacity of the single-string battery can be repaired and increased.
[00371 Preferably, the preset time for standing is 1 hour to 2 hours, and the shorter standing time can meet standing requirements, which means that the single-string battery can be charged again.
[0038] It should be noted that since the single-string battery may be charged to the upper-limit voltage faster when the single-string battery is charged again after being fully charged, a charging time for repeated charging is shorter, which may either be dozen of seconds or one minute. Different models of battery cells may also cause changes in the charging time, which aims to realize a repeated charging process of standing-charging-standing-charging after the single-string battery is fully charged, so as to repair the upper limit of the battery capacity of the single-string battery.
[0039] In S400, each of the single-string batteries is discharged to the lower-limit voltage.
[0040] In the embodiment, a discharging current of the single-string battery is 0.1 C to 0.5 C.
[0041] In S500, the plurality of single-string batteries are connected in parallel.
[0042] Specifically, the S500 includes: connecting the plurality of single-string batteries in parallel, and then installing a case of the decommissioned battery module.
[0043] When a lithium ion battery module is repeatedly used, and a capacity of the lithium ion battery module decays to less than 70% of an initial capacity, the lithium ion battery module may be decommissioned to become the decommissioned battery module, and the above method for repairing the decommissioned battery module is used to repair the performance of the decommissioned battery module. Compared with the capacity of the battery module before repairing, the battery capacity of the decommissioned battery module can be repaired and increased by more than 20%, thus greatly improving the battery capacity of the decommissioned battery module.
[0044] When the above method for repairing the decommissioned battery module is used to repair the decommissioned battery module, an overall shape of the decommissioned battery module is maintained without needing to disassemble the decommissioned battery module into a single battery cell, and only the parallel connection among the plurality of single-string batteries is released to repair each of the single-string batteries. Compared with a traditional method for repairing the decommissioned battery module, the above method for repairing the decommissioned battery module has a lower cost when repairing the decommissioned battery module.
[0045] Specific embodiments are as follows.
[0046] Embodiment 1 to Embodiment 6
[00471 Decommissioned battery modules in Table 1 below are taken as samples, and are respectively numbered as B, and repairing tests are performed on the samples by the process method according to the present disclosure. An ECT051OOA energy-feedback battery detection device D produced by Shenzhen Hengyineng Technology Co., Ltd is employed as a charging and discharging testing device.
[0048] Table 1: Decommissioned Battery Module Samples
[0049]
Sample Positive electrode active Packaging case and shape Rated capacity C (Ah) number material
B Square aluminum case 140 LiFePO 4
[0050] A repairing method and operation steps are as follows.
[0051] In P1, a fully charged decommissioned battery module is discharged with the detection device D to a lower-limit voltage at a constant current of 0.5 C, a discharge capacity
CO is recorded, and a lower-limit voltage of a single lithium iron phosphate battery is 2.0 V.
[0052] In P2, the decommissioned battery module is charged to an upper-limit voltage, a case of the decommissioned battery module is opened to expose positive and negative terminals of a plurality of single-string batteries, and then parallel connection of the plurality of single-string batteries in the decommissioned battery module is released (in other words, wires wound on the terminals to realize the parallel connection are unwound).
[0053] In P3, the decommissioned battery module which is charged to the upper-limit voltage is stood for 1 hour, and then each of the single-string batteries is respectively charged to the upper-limit voltage. An upper-limit voltage of the single lithium iron phosphate battery is 3.6 V, and a cut-off current of constant-voltage charging is 0.02 C. The fully charged single-string batteries are stood for 1 hour, and then each of the single-string batteries is charged to the upper-limit voltage again at a constant current and a constant voltage. A charging current is 0.1 C to 0.5 C, the upper-limit voltage of the single lithium iron phosphate battery is 3.6 V, and the cut-off current of the constant-voltage charging is 0.02 C.
[0054] In P4, each of the single-string batteries is discharged from the upper-limit voltage to the lower-limit voltage at the constant current. A discharging current is 0.1 C to 0.5 C, and the lower-limit voltage of the single lithium iron phosphate battery is 2.0 V.
[0055] In P5, the P3 and the P4 are repeated for three times, the plurality of single-string batteries are connected in parallel, and then the case of the decommissioned battery module is installed.
[0056] In P6, the repaired decommissioned battery module is charged to the upper-limit voltage at the constant current of 0.5 C and the constant voltage in a normal temperature environment with the cut-off current of 0.02 C, and then is discharged to the lower-limit voltage at the constant current of 0.5 C. A discharge capacity C1 is recorded.
[00571 Embodiments 1 to 6 and Comparative Examples 1 to 3: the samples B are repaired according to the above steps, and are repaired according to different process condition settings in the Table 2 below, and capacity results before and after repairing under various conditions are shown in the Table 2.
[0058] Table 2: Capacity Increase of Samples B Before and After Repairing at Charging and Discharging Currents of 0.1 C to 0.5 C at 250 C to 600 C
[0059]
Ratio of Process condition Ratio of Capacit capacity Capacit capacity y before before Environ Char Disch y after after repairin Experiment No. repairing repairing ment ging Charging arging repairing repairing g CN.Ah) to rated tempera curre time curren gC1 treated increase capacity ture nt t (Ah) capacity e rate CO/C(%) C1/C (%) (%)
980 minutes Embodiment 1 97.0 69.3 0.1 C 134.3 95.9 38.5
- - 0.1 C
680 0.2 C minutes
Embodiment 2 98.0 70.0 45W 0.2 C - - 133.8 95.6 36.5
- - 0.2 C
380 0.5 C 30 minutes Embodiment 3 96.0 68.6 0.5 C - - 127.7 91.2 33.0
- - 0.5 C
980 0.1 C 90 minutes Embodiment 4 96.6 69.0 0.1 C - - 132.1 94.4 36.7
- - 0.1 C
680 0.2 C 680 60 0 minutes Embodiment 5 95.3 68.1 0.2 C 127.8 91.3 34.1
0.5 C . Embodiment 6 97.7 69.8 minutes 126.5 90.4 29.5 0.5 C - -
Ratio of Process condition Ratio of Capacit capacity Capacit capacity y before before Environ Char Disch y after after repairin Experiment No. repairing repairing ment ging Charging arging repairing repairing g time curren gC1 treated increase CN.Ah) to rated tempera curre capacity ture nt t (Ah) capacity e rate CO/C(%) C1/C (%) (%)
- - 0.5 C
980 minutes Comparison 1 96.9 69.2 0.1C - - 119.6 85.4 23.4
- - 0.1 C
680 0.2 C 680 Normal minutes Comparison 2 95.9 68.5 tempera 0.2 C - - 116.1 82.9 21.1 ture - - 0.2 C
380 0.5 C 30 minutes Comparison 3 94.2 67.3 0.5C - - 111.2 79.4 18.0
- - 0.5 C
[00601 It can be seen from the above table that when the decommissioned battery module is repaired by charging and discharging at different currents, capacity repaired by charging and discharging at a current of 0.1 C at 45°C has a relatively optimum effect, but the charging and the discharging at the current of 0.1 C last too long, resulting in a low production efficiency. Moreover, the capacity repaired by charging and discharging at the current of 0.1 C is not significantly increased in comparison to the capacity repaired by charging and discharging at a current of 0.2 C. In view of a production efficiency, an energy consumption and a capacity repairing effect, an optimal condition for implementing the process according to the present disclosure is charging and discharging at the current of 0.2 C at 45C.
[0061] Experimental results show that, the present disclosure only needs to repeatedly repair the decommissioned battery module by several small-current charging and discharging in a higher temperature environment, and SOC discharging ends of the single-string batteries are aligned in a small-current discharging manner on the premise of not disassembling the decommissioned battery module into the single battery cell at the same time, so that a dischargeable capacity of the decommissioned battery module is increased after repairing. By repetitively standing and recharging, the discharge capacity of the repaired battery is increased by more than 20% in comparison to the discharge capacity of the battery before repairing. The repaired battery is installed to a vehicle and recycled according to the same requirements, and may be continuously used for more than 3 years, thus prolonging a service life of the battery.
[0062] The repairing method according to the present disclosure is simple in process, convenient in operation and low in cost, can save capital and energy, reduce battery scrapping and protect environment through repairing the decommissioned lithium ion battery, and has an important practical disclosure value.
[0063] The present disclosure is not limited to repair the performance of the decommissioned power lithium ion battery, and the technical solution can be used to effectively repair and increase the performance of the batteries as long as a recycling capacity of the batteries that are from various fields, made of various positive and negative electrode materials, and provided with various packaging cases is reduced to about 70% after use.
[0064] The embodiments above merely express several embodiments of the present disclosure in a more specific and detailed manner, but cannot be understood as limiting the patent scope of the present disclosure. It should be pointed out that many deformations and improvements can further be made by those of ordinary skills in the art on the premise of not deviating from the concept of the present invention, and all the deformations and improvements shall fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the patent of the present disclosure shall be subject to the appended claims.
Claims (10)
1. A method for repairing a decommissioned battery module, wherein the decommissioned
battery module comprises a plurality of single-string batteries connected in parallel, each of the
single-string batteries is formed by connecting a plurality of battery monomers in series, and the
method comprises the following steps of:
charging the decommissioned battery module to an upper-limit voltage;
releasing parallel connection of the plurality of single-string batteries in the
decommissioned battery module;
standing the decommissioned battery module which is charged to the upper-limit voltage for
a preset time, and then respectively charging each of the single-string batteries to the upper-limit
voltage;
discharging each of the single-string batteries to a lower-limit voltage; and
connecting the plurality of single-string batteries in parallel.
2. The method for repairing the decommissioned battery module according to claim 1,
wherein after the operation of respectively charging each of the single-string batteries to the
upper-limit voltage, the method further comprises performing the following operations of:
standing the plurality of single-string batteries for the preset time, and respectively charging each
of the single-string batteries to the upper-limit voltage again.
3. The method for repairing the decommissioned battery module according to claim 2,
wherein the operations of standing the plurality of single-string batteries for the preset time, and
respectively charging each of the single-string batteries to the upper-limit voltage again are
repetitive operations that are repeated for 2 times to 10 times.
4. The method for repairing the decommissioned battery module according to claim 1,
wherein the operation of releasing the parallel connection of the plurality of single-string
batteries in the decommissioned battery module comprises: opening a case of the
decommissioned battery module to expose positive and negative terminals of the plurality of
single-string batteries, and then releasing the parallel connection of the plurality of single-string
batteries in the decommissioned battery module.
5. The method for repairing the decommissioned battery module according to claim 1,
wherein the operation of connecting the plurality of single-string batteries in parallel comprises:
connecting the plurality of single-string batteries in parallel, and then installing a case of the
decommissioned battery module.
6. The method for repairing the decommissioned battery module according to any one of
claims 1 to 5, wherein the decommissioned battery module comprises 3 to 20 single-string
batteries connected in parallel, and each of the single-string batteries is formed by connecting 3
to 20 battery monomers in series.
7. The method for repairing the decommissioned battery module according to any one of
claims 1 to 5, wherein the preset time is 1 hour to 24 hours.
8. The method for repairing the decommissioned battery module according to claim 7,
wherein the preset time is 1 hour to 2 hours.
9. The method for repairing the decommissioned battery module according to any one of
claims 1 to 5, wherein a cut-off current of the single-string battery is 0.02 C.
10. The method for repairing the decommissioned battery module according to any one of
claims 1 to 5, wherein a charging current of the single-string battery is 0.1 C to 0.5 C, and a
discharging current of the single-string battery is 0.1 C to 0.5 C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/076109 WO2021163985A1 (en) | 2020-02-21 | 2020-02-21 | Method for repairing decommissioned battery module |
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| AU2020202737B1 true AU2020202737B1 (en) | 2021-05-13 |
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| JP (1) | JP7142697B2 (en) |
| AU (1) | AU2020202737B1 (en) |
| SG (1) | SG11202003648UA (en) |
| WO (1) | WO2021163985A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002601A (en) * | 2021-09-24 | 2022-02-01 | 河南利威新能源科技有限公司 | Method and device for calculating capacity of retired lithium ion battery cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115663324B (en) * | 2022-08-05 | 2023-10-20 | 西安交通大学 | Retired battery diaphragm repairing and regenerating process |
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|---|---|---|---|---|
| US20190198856A1 (en) * | 2017-12-22 | 2019-06-27 | Ut-Battelle, Llc | Fast formation cycling for rechargeable batteries |
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| JP2007026733A (en) * | 2005-07-12 | 2007-02-01 | Sanyo Electric Co Ltd | Control method of battery pack |
| CN103337671A (en) * | 2013-06-27 | 2013-10-02 | 国家电网公司 | Cascade utilization screening method of waste power batteries |
| CN105489962B (en) * | 2015-11-30 | 2017-10-13 | 山东精工电子科技有限公司 | A kind of waste and old power lithium-ion battery recoverying and utilizing method |
| CN107394293B (en) * | 2017-07-07 | 2019-06-18 | 协能济（北京）储能科技有限公司 | A kind of restorative procedure and its reparation circuit of retired capacity of lithium ion battery |
| CN108232337A (en) * | 2017-12-07 | 2018-06-29 | 上海国际汽车城（集团）有限公司 | A kind of retired battery step check and evaluation of electric vehicle utilizes method |
| CN108281718B (en) * | 2017-12-28 | 2019-11-05 | 浙江赫克力能源有限公司 | A kind of restorative procedure of waste and old lead acid accumulator |
| CN110021793A (en) * | 2018-01-09 | 2019-07-16 | 深圳市普兰德储能技术有限公司 | A method of repairing retired performance of lithium ion battery |
| CN108448192A (en) * | 2018-01-12 | 2018-08-24 | 深圳市凤凰锂能科技有限公司 | The recoverying and utilizing method of retired power battery |
| CN110752411B (en) * | 2019-11-12 | 2022-09-20 | 朴元成 | Battery repairing method and device |
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2020
- 2020-02-21 SG SG11202003648UA patent/SG11202003648UA/en unknown
- 2020-02-21 JP JP2020526287A patent/JP7142697B2/en active Active
- 2020-02-21 AU AU2020202737A patent/AU2020202737B1/en active Active
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190198856A1 (en) * | 2017-12-22 | 2019-06-27 | Ut-Battelle, Llc | Fast formation cycling for rechargeable batteries |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002601A (en) * | 2021-09-24 | 2022-02-01 | 河南利威新能源科技有限公司 | Method and device for calculating capacity of retired lithium ion battery cell |
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| JP2022524170A (en) | 2022-04-28 |
| WO2021163985A1 (en) | 2021-08-26 |
| JP7142697B2 (en) | 2022-09-27 |
| SG11202003648UA (en) | 2021-09-29 |
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