CN109669143B - Battery pack capacity evaluation method - Google Patents
Battery pack capacity evaluation method Download PDFInfo
- Publication number
- CN109669143B CN109669143B CN201910093911.6A CN201910093911A CN109669143B CN 109669143 B CN109669143 B CN 109669143B CN 201910093911 A CN201910093911 A CN 201910093911A CN 109669143 B CN109669143 B CN 109669143B
- Authority
- CN
- China
- Prior art keywords
- battery pack
- dynamic
- voltage
- pressure difference
- value
- 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.)
- Active
Links
Images
Landscapes
- Secondary Cells (AREA)
Abstract
The invention provides a battery pack capacity evaluation method, and belongs to the technical field of battery pack quality detection. The battery pack capacity evaluation method comprises the following steps: discharging the battery pack to be tested with the initial charge amount within a set range to cut-off voltage according to a set multiplying power, and determining a relation curve of the lowest monomer voltage and the discharge time and a relation curve of the lowest monomer voltage and the dynamic pressure difference in the discharge process; taking the dynamic pressure difference value corresponding to the common maximum inflection point on the two curves as a first characteristic voltage point dynamic pressure difference value, and taking the dynamic pressure difference value at the discharge cutoff position as a second characteristic voltage point dynamic pressure difference value; and comparing the obtained dynamic differential pressure values of the two characteristic voltage points with the corresponding qualified dynamic differential pressure standard value, and if the two dynamic differential pressure values do not exceed the corresponding qualified dynamic differential pressure standard value, indicating that the capacity of the battery pack to be tested is qualified. The battery pack capacity evaluation method can shorten evaluation time and reduce evaluation cost.
Description
Technical Field
The invention relates to a battery pack capacity evaluation method, and belongs to the technical field of battery pack quality detection.
Background
The existing battery pack capacity evaluation method is in a full-charge state when the battery is discharged, so that the battery pack needs to be fully charged before discharging, and the discharge capacity is the actual capacity of the battery pack, so that the time spent in the evaluation process is too long. Meanwhile, charging and discharging are required to be completed on power charging and discharging working condition equipment, and the cost of the power charging and discharging working condition equipment is high. Therefore, the existing battery capacity evaluation method takes long time and requires high cost.
Disclosure of Invention
The invention aims to provide a battery pack capacity evaluation method to solve the problems of long time and high cost of battery pack capacity evaluation at present.
In order to achieve the above object, the present invention provides a battery pack capacity evaluation method, including the steps of:
1) discharging the battery pack to be tested with the initial charge amount within a set range to cut-off voltage according to a set multiplying power, and determining a relation curve of the lowest monomer voltage and the discharge time and a relation curve of the lowest monomer voltage and the dynamic pressure difference in the discharge process;
2) taking the dynamic pressure difference value corresponding to the common maximum inflection point on the two curves as a first characteristic voltage point dynamic pressure difference value, and taking the dynamic pressure difference value at the discharge cutoff position as a second characteristic voltage point dynamic pressure difference value;
3) and comparing the obtained dynamic differential pressure values of the two characteristic voltage points with corresponding dynamic differential pressure qualified standard values, and if the two dynamic differential pressure values do not exceed the corresponding dynamic differential pressure qualified standard values, indicating that the capacity of the battery pack to be tested is qualified, wherein the dynamic differential pressure qualified standard values are determined according to the full-charge and full-discharge capacity evaluation data of the battery pack.
The battery pack capacity evaluation method has the beneficial effects that: the method is used for evaluating the capacity of the battery pack, and the battery pack is not required to be in a full-charge state when being discharged, so that the process of fully charging the battery pack is saved, and the evaluation time is shortened; in addition, special power charging and discharging working condition equipment is not needed, so that the cost is reduced.
In order to obtain a qualified standard value of the dynamic pressure difference so as to judge whether the capacity of the battery pack to be tested is qualified or not, as an improvement of the above battery pack capacity evaluation method, the obtaining process of the qualified standard value of the dynamic pressure difference is as follows:
A. extracting at least 100 sets of battery packs, and discharging to cut-off voltage according to a set multiplying power after each set of battery pack is fully charged;
B. acquiring a characteristic voltage point dynamic voltage difference value of each battery pack in a discharging process, wherein each group comprises a corresponding first characteristic voltage point dynamic voltage difference value and a corresponding second characteristic voltage point dynamic voltage difference value;
C. and calculating the average value of the dynamic voltage difference values of the first characteristic voltage point and the average value of the dynamic voltage difference values of the second characteristic voltage point in the obtained dynamic voltage difference values of the characteristic voltage points of each battery pack, and respectively taking the set proportion of each average value as the qualified standard value of the dynamic voltage difference of the first characteristic voltage point and the qualified standard value of the dynamic voltage difference of the second characteristic voltage point.
In order to make the obtained qualified standard value of the dynamic pressure difference more reasonable, the value range of the set proportion in the step C is 105-120 percent as another improvement of the battery pack capacity evaluation method.
In order to evaluate whether the capacity of the battery pack is qualified or not under the condition that the battery pack is not required to be fully charged so as to reduce the evaluation time, as a further improvement of the battery pack capacity evaluation method, the set range is 30% -70%.
Drawings
Fig. 1 is a flow chart of a battery capacity evaluation method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The method for evaluating the capacity of the battery pack is described in detail below by taking a power lithium battery pack as an example. The power lithium battery pack is formed by selecting monomer cells meeting the capacity required by customers. After the power lithium battery pack is formed by connecting the single battery cells in series and in parallel, the pack capacity has a certain attenuation relative to the single capacity, so that the rated capacity of each single battery cell forming the power lithium battery pack needs to meet the customer requirements, and the calculation is carried out according to the standard that the rated capacity of the single battery cell is equal to the capacity of the power lithium battery pack multiplied by 102 percent when the rated capacity of the single battery cell is calculated.
Referring to fig. 1, the battery capacity evaluating method includes the steps of:
step 1: according to the discharge process test data of the battery pack to be tested, a corresponding relation curve of the discharge time and the lowest single voltage (namely, a relation curve of the lowest single voltage and the discharge time) and a corresponding relation curve of the lowest single voltage and the dynamic pressure difference (namely, a relation curve of the lowest single voltage and the dynamic pressure difference) are determined.
In this embodiment, the battery pack to be tested, the initial charge of which is within the range of 30% SOC to 70% SOC (i.e., within the set range), is discharged to the cut-off voltage according to the 1C magnification (i.e., the set magnification), the discharging process may be performed on the battery rack, the voltage value of each single battery cell in the discharging process of the battery pack to be tested is collected by the battery management group, and the maximum value and the minimum value among the voltage values of all the single battery cells in the discharging process of the battery pack to be tested are calculated. Wherein, the minimum value is used as the lowest monomer voltage, and the difference between the maximum value and the minimum value is used as the dynamic pressure difference. Drawing a scatter diagram of the lowest monomer voltage and the discharge time by using an EXCEL tool, determining a corresponding relation curve (marked as a T-Vmin curve) of the discharge time and the lowest monomer voltage, drawing a scatter diagram of the dynamic pressure difference and the lowest monomer voltage, and determining a corresponding relation curve (marked as a Vmin-DVDiff curve) of the lowest monomer voltage and the dynamic pressure difference.
In other embodiments, the setting range of the initial charge of the battery pack to be tested, the setting magnification during discharging, and the cut-off voltage can be adjusted according to actual conditions.
Step 2: and determining the characteristic voltage point dynamic pressure difference values (including a first characteristic voltage point dynamic pressure difference value and a second characteristic voltage point dynamic pressure difference value) according to the slopes and slope change rates of the T-Vmin curve and the Vmin-DVDiff curve.
In the discharging process, when the charge capacity of the battery pack to be tested is in a 10% SOC-0% SOC interval, the voltage of each monomer battery core is rapidly reduced, a very obvious inflection point is formed on a T-Vmin curve, and the slope of the T-Vmin curve is rapidly increased. Meanwhile, because the rapid reduction rates of the cell voltages of the single cells are not consistent, an obvious inflection point is also formed on the Vmin-DVDiff curve. In this embodiment, the voltage value at the common maximum inflection point on the two curves is used as the first characteristic voltage point, and the dynamic voltage difference value corresponding to the common maximum inflection point on the two curves is used as the first characteristic voltage point dynamic voltage difference value (i.e., the dynamic voltage difference value corresponding to the first characteristic voltage point).
As the depth of discharge continues to increase, the slope of the two curves continues to increase until the discharge cutoff voltage. In this embodiment, the voltage value at the discharge cutoff point is used as the second characteristic voltage point, and the dynamic voltage difference value at the discharge cutoff point is used as the second characteristic voltage point dynamic voltage difference value (i.e., the dynamic voltage difference value corresponding to the second characteristic voltage point).
And step 3: and (3) formulating a characteristic voltage point dynamic differential pressure judgment standard (comprising a qualified standard value of the dynamic differential pressure of the first characteristic voltage point and a qualified standard value of the dynamic differential pressure of the second characteristic voltage point) by combining the full charge and full discharge capacity evaluation data of the power lithium battery pack.
In this embodiment, 100 sets of power lithium battery packs (hereinafter referred to as battery packs) are selected, and after each set of battery pack is fully charged, the battery packs are discharged to a cut-off voltage according to a 1C magnification (i.e., a set magnification).
And (3) acquiring a first characteristic voltage point dynamic voltage difference value and a second characteristic voltage point dynamic voltage difference value in the discharging process of each set of battery pack by utilizing the step (1) and the step (2) to obtain 100 sets of characteristic voltage point dynamic voltage difference values.
Calculating the average value of the dynamic voltage difference values of the first characteristic voltage point in the obtained 100 groups of dynamic voltage difference values of the characteristic voltage points, and taking 105 percent (namely a set proportion) of the average value as a qualified dynamic voltage difference standard value of the first characteristic voltage point; similarly, calculating the average value of the dynamic voltage difference values of the second characteristic voltage point in the obtained 100 groups of dynamic voltage difference values of the characteristic voltage point, and taking 105% of the average value as the qualified dynamic voltage difference standard value of the second characteristic voltage point respectively.
As another embodiment, when the dynamic differential pressure qualified standard value is determined, the set multiplying power when the battery pack is discharged and the set proportion of the dynamic differential pressure value average of the first and second characteristic voltage points may all be adjusted according to actual conditions, for example, the set proportion may be selected from a range of 105% to 120%.
As another embodiment, in order to make the obtained dynamic differential pressure qualified standard value more conform to the actual situation, more than 100 sets of evaluation data of the full charge and full discharge capacity of the power lithium battery pack may be selected as required to calculate the dynamic differential pressure qualified standard value.
And 4, step 4: and judging whether the capacity of the battery pack to be tested is qualified or not according to the characteristic voltage point dynamic pressure difference judgment standard.
And (3) comparing the first characteristic voltage point dynamic pressure difference value and the second characteristic voltage point dynamic pressure difference value of the battery pack to be tested obtained in the step (2) with corresponding dynamic pressure difference qualified standard values respectively, and if the first characteristic voltage point dynamic pressure difference value and the second characteristic voltage point dynamic pressure difference value do not exceed the corresponding dynamic pressure difference qualified standard values, indicating that the capacity of the battery pack to be tested is qualified.
In the embodiment, whether the capacity of the battery pack is qualified or not is evaluated according to the dynamic voltage difference value of the two characteristic voltage points in the discharging process of the battery pack, and the problems that the evaluation of the capacity of the battery pack takes long time and the required equipment and labor cost are high are solved.
Claims (4)
1. A battery pack capacity evaluation method is characterized by comprising the following steps:
1) discharging the battery pack to be tested with the initial charge amount within a set range to cut-off voltage according to a set multiplying power, and determining a relation curve of the lowest monomer voltage and the discharge time and a relation curve of the lowest monomer voltage and the dynamic pressure difference in the discharge process; the dynamic pressure difference is the difference value between the maximum value and the minimum value of all the single cell voltage values in the discharging process of the battery pack to be tested;
2) taking the dynamic pressure difference value corresponding to the common maximum inflection point on the two curves as a first characteristic voltage point dynamic pressure difference value, and taking the dynamic pressure difference value at the discharge cutoff position as a second characteristic voltage point dynamic pressure difference value;
3) and comparing the obtained dynamic differential pressure values of the two characteristic voltage points with corresponding dynamic differential pressure qualified standard values, and if the two dynamic differential pressure values do not exceed the corresponding dynamic differential pressure qualified standard values, indicating that the capacity of the battery pack to be tested is qualified, wherein the dynamic differential pressure qualified standard values are determined according to the full-charge and full-discharge capacity evaluation data of the battery pack.
2. The battery pack capacity evaluation method according to claim 1, wherein the obtaining of the dynamic pressure difference qualification value is as follows:
A. extracting at least 100 sets of battery packs, and discharging to cut-off voltage according to a set multiplying power after each set of battery pack is fully charged;
B. acquiring a characteristic voltage point dynamic pressure difference value of each battery pack in a discharging process, wherein the characteristic voltage point dynamic pressure difference value of each battery pack comprises a first characteristic voltage point dynamic pressure difference value and a second characteristic voltage point dynamic pressure difference value which correspond to each other;
C. and calculating the average value of the dynamic voltage difference values of the first characteristic voltage point and the average value of the dynamic voltage difference values of the second characteristic voltage point in the obtained dynamic voltage difference values of the characteristic voltage points of each battery pack, and respectively taking the set proportion of each average value as the qualified standard value of the dynamic voltage difference of the first characteristic voltage point and the qualified standard value of the dynamic voltage difference of the second characteristic voltage point.
3. The battery pack capacity evaluation method according to claim 2, wherein the value range of the ratio set in step C is 105% to 120%.
4. The battery pack capacity evaluation method according to claim 1, wherein the set range is 30% to 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093911.6A CN109669143B (en) | 2019-01-30 | 2019-01-30 | Battery pack capacity evaluation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093911.6A CN109669143B (en) | 2019-01-30 | 2019-01-30 | Battery pack capacity evaluation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109669143A CN109669143A (en) | 2019-04-23 |
| CN109669143B true CN109669143B (en) | 2021-01-29 |
Family
ID=66150091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910093911.6A Active CN109669143B (en) | 2019-01-30 | 2019-01-30 | Battery pack capacity evaluation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109669143B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687457B (en) * | 2019-11-13 | 2021-12-03 | 东软睿驰汽车技术（沈阳）有限公司 | Battery pack abnormity detection method and device, storage medium and electronic equipment |
| CN111999671B (en) * | 2020-08-04 | 2023-01-10 | 中汽研汽车检验中心（天津）有限公司 | Lithium ion battery overdischarge excess capacity value calculation method |
| CN113281667A (en) * | 2021-05-14 | 2021-08-20 | 奇瑞商用车（安徽）有限公司 | Power battery pack capacity testing method |
| CN114137421B (en) * | 2021-11-30 | 2023-09-19 | 章鱼博士智能技术(上海)有限公司 | Battery abnormality detection method, device, equipment and storage medium |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008179284A (en) * | 2007-01-25 | 2008-08-07 | Toyota Motor Corp | Degradation determination device of secondary battery |
| CN103728565A (en) * | 2013-12-19 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for detecting whether battery pack is qualified or not |
| CN103852724A (en) * | 2012-11-29 | 2014-06-11 | 北汽福田汽车股份有限公司 | Assessment method for low-temperature performance of cells |
| CN104166102A (en) * | 2014-08-22 | 2014-11-26 | 湖南科霸汽车动力电池有限责任公司 | Judgment method for SOC use interval of automotive power battery pack |
| CN104183878A (en) * | 2014-08-19 | 2014-12-03 | 国家电网公司 | Equalized battery access point determination method and device |
| CN104269574A (en) * | 2014-09-23 | 2015-01-07 | 中航锂电（洛阳）有限公司 | Battery pack sorting method |
| CN104535935A (en) * | 2014-12-31 | 2015-04-22 | 普天新能源车辆技术有限公司 | Capacity detection method and device of power battery pack |
| CN204302467U (en) * | 2014-12-31 | 2015-04-29 | 普天新能源车辆技术有限公司 | A kind of capacity checking apparatus of power battery pack |
| CN105449740A (en) * | 2015-11-13 | 2016-03-30 | 中国东方电气集团有限公司 | Energy storage lithium battery active balancing control system and control method |
| CN106785178A (en) * | 2017-03-16 | 2017-05-31 | 许继电源有限公司 | Battery modules recycle detection, screening method for group matching and device |
| CN108287318A (en) * | 2018-01-30 | 2018-07-17 | 上海华普汽车有限公司 | A kind of detection method and detecting system based on power cell of vehicle packet |
| CN108680868A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of battery pack loop test consistency analysis method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4872496B2 (en) * | 2006-07-06 | 2012-02-08 | 日産自動車株式会社 | Battery detection device |
| WO2008053410A2 (en) * | 2006-10-30 | 2008-05-08 | Koninklijke Philips Electronics N.V. | Apparatus and method for determination of the state-of-charge of a battery when the battery is not in equilibrium |
| US7429856B1 (en) * | 2007-11-20 | 2008-09-30 | Qualitau, Inc. | Voltage source measurement unit with minimized common mode errors |
| JP5994240B2 (en) * | 2011-12-02 | 2016-09-21 | 日産自動車株式会社 | Battery control device |
| US9151783B2 (en) * | 2012-04-26 | 2015-10-06 | Synopsys, Inc. | Ground offset monitor and compensator |
| CN103424713B (en) * | 2013-08-23 | 2016-04-20 | 河南超威电源有限公司 | Lead-acid power battery capacity method for group matching |
| CN104614679B (en) * | 2015-01-22 | 2017-05-10 | 哈尔滨龙易电气有限公司 | Method for measuring surplus capacity of curve-fitting type storage battery |
| CN109245211A (en) * | 2018-09-26 | 2019-01-18 | 合肥工业大学 | A kind of two-stage circuit of battery pack balancing based on Flyback converter |
-
2019
- 2019-01-30 CN CN201910093911.6A patent/CN109669143B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008179284A (en) * | 2007-01-25 | 2008-08-07 | Toyota Motor Corp | Degradation determination device of secondary battery |
| CN103852724A (en) * | 2012-11-29 | 2014-06-11 | 北汽福田汽车股份有限公司 | Assessment method for low-temperature performance of cells |
| CN103728565A (en) * | 2013-12-19 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for detecting whether battery pack is qualified or not |
| CN104183878A (en) * | 2014-08-19 | 2014-12-03 | 国家电网公司 | Equalized battery access point determination method and device |
| CN104166102A (en) * | 2014-08-22 | 2014-11-26 | 湖南科霸汽车动力电池有限责任公司 | Judgment method for SOC use interval of automotive power battery pack |
| CN104269574A (en) * | 2014-09-23 | 2015-01-07 | 中航锂电（洛阳）有限公司 | Battery pack sorting method |
| CN104535935A (en) * | 2014-12-31 | 2015-04-22 | 普天新能源车辆技术有限公司 | Capacity detection method and device of power battery pack |
| CN204302467U (en) * | 2014-12-31 | 2015-04-29 | 普天新能源车辆技术有限公司 | A kind of capacity checking apparatus of power battery pack |
| CN105449740A (en) * | 2015-11-13 | 2016-03-30 | 中国东方电气集团有限公司 | Energy storage lithium battery active balancing control system and control method |
| CN106785178A (en) * | 2017-03-16 | 2017-05-31 | 许继电源有限公司 | Battery modules recycle detection, screening method for group matching and device |
| CN108287318A (en) * | 2018-01-30 | 2018-07-17 | 上海华普汽车有限公司 | A kind of detection method and detecting system based on power cell of vehicle packet |
| CN108680868A (en) * | 2018-05-28 | 2018-10-19 | 天津市捷威动力工业有限公司 | A kind of battery pack loop test consistency analysis method |
Non-Patent Citations (3)
| Title |
|---|
| The Capacity Effect on Consistency of Energy Storage Batteries;Hongwei Wang 等;《2018 International Conference on Electronics Technology (ICET)》;20180731;第82-85页 * |
| 基于负荷电流放电法的蓄电池容量预估技术;苗俊杰 等;《电源技术》;20180630;第42卷(第6期);第889-891页 * |
| 锂离子电池串联一致性与电压差的研究;王正 等;《电池工业》;20170228;第21卷(第1期);第12-15页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109669143A (en) | 2019-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109669143B (en) | Battery pack capacity evaluation method | |
| CN108089133B (en) | Battery pack consistency detection method and detection device for energy storage system | |
| CN107983667B (en) | Lithium ion battery matching method | |
| CN108490366B (en) | Rapid assessment method for state of health of electric automobile retired battery module | |
| CN111036575B (en) | Lithium ion battery sorting method based on temperature change analysis | |
| CN102590751A (en) | Assessment method and device for consistency of power battery pack | |
| CN112881928B (en) | Screening method for consistency of battery monomers | |
| CN109946616B (en) | Method for estimating unbalance degree of system capacity of lithium iron phosphate battery | |
| CN107843846A (en) | A kind of health state of lithium ion battery method of estimation | |
| CN104617339A (en) | Lithium ion battery group matching method | |
| CN113109729B (en) | Vehicle power battery SOH evaluation method based on accelerated aging test and real vehicle working condition | |
| CN111551868B (en) | Consistency analysis method for lithium iron phosphate battery system | |
| CN112051512B (en) | Echelon utilization sorting method and energy storage system | |
| CN110687464B (en) | Speed-adjustable type gradient utilization power battery sorting method | |
| CN111786035A (en) | Lithium ion battery matching method | |
| CN111562509B (en) | Method and system for determining residual life of retired power battery | |
| CN103412264A (en) | Method for evaluating consistency of single cells in storage battery pack | |
| CN111029668A (en) | Matching method of lithium ion power batteries | |
| CN111064253A (en) | Battery health degree rapid evaluation method based on average discrete Frechet distance | |
| CN111965557A (en) | Backup power reliability assessment method and device | |
| CN117233622A (en) | New energy automobile power lithium battery performance detection test method | |
| CN112114260A (en) | Method for testing and evaluating overcharge stability of lithium ion battery monomer | |
| CN117007975A (en) | Method for performing reinforcement learning on battery capacity attenuation assessment by collecting multi-point temperatures of battery cells of energy storage battery | |
| CN114798502B (en) | Classification grouping method, system and production line for gradient utilization batteries | |
| CN113759254B (en) | Battery reorganization method, device, equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: Kaibo Energy Technology Co.,Ltd. Address after: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee after: Kaibo Energy Technology Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY RESEARCH INSTITUTE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. |