Prosecution Insights
Last updated: October 02, 2026
Application No. 18/267,161

Battery Management System, Battery Pack, Electric Vehicle, and Battery Management Method

Final Rejection §102
Filed
Jun 14, 2023
Priority
Jul 26, 2021 — RE 10-2021-0098141 +1 more
Examiner
MCDANIEL, TYNESE V
Art Unit
2859
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
LG Energy Solution Ltd.
OA Round
2 (Final)
59%
Grant Probability
Moderate
3-4
OA Rounds
0m
Est. Remaining
75%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allowance Rate
219 granted / 374 resolved
-9.4% vs TC avg
Strong +16% interview lift
Without
With
+16.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
44 currently pending
Career history
401
Total Applications
across all art units

Statute-Specific Performance

§101
3.1%
-36.9% vs TC avg
§103
59.0%
+19.0% vs TC avg
§102
6.6%
-33.4% vs TC avg
§112
29.4%
-10.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 374 resolved cases

Office Action

§102
CTNF 18/267,161 CTNF 92614 DETAILED ACTION Notice of Pre-AIA or AIA Status 07-03-aia AIA 15-10-aia The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA. 12-151 AIA 26-51 12-51 Status of Claims This Office Action is in response to the application filed on 06/14/2023. Claims 1-15 are presently pending and are presented for examination. Information Disclosure Statement The information disclosure statement (IDS) submitted on 06/14/2023, 06/18/2024, 12/12/2024 and 01/05/2026 are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: 07-12-aia AIA (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. 07-15-03-aia AIA Claim s 1-15 is/are rejected under 35 U.S.C. 102(a)(2) as being anticipated by Itakura (US 20210296911) . As to claim 1, Itakura discloses a battery management system (Fig. 1 , power supply system 1) comprising: a battery monitor configured to detect a voltage of each of a plurality of batteries connected in series (Fig. 1, voltage detector 12) ; a balancer configured to perform a balancing operation for each battery (discharger 11) ; and a control circuit (controller 15) configured to: control the balancer based on the voltage of each battery detected by the battery monitor (Fig. 11 S111-S1113, Equalization process in progress) , and for each battery of the plurality of batteries (Fig. 11 [0046] The above process is repeatedly executed for all the cells included in power storage module M1 while power supply system 1 is in operation (N in S17). : determine a first voltage value indicating a no-load voltage of the battery ([0065] and Fig. 11 Voltage detector 12 detects voltages of n cells connected in series and transmits the voltages to controller 15 (S10). [0040] Controller 15 executes an equalization process between the plurality of cells C1 to C20 based on the voltages of the plurality of cells C1 to C20 received from voltage detector 12 (S111)…the OCV of the cell with the lowest OCV becomes the target value.) , compensate the first voltage value of the battery using a balancing capacity of the battery by the balancing operation performed at a latest reference time (Fig. 11 , S113. [0066] Controller 15 adds the estimated voltage decrease quantity as compensation value V Δt to the detected voltage of the equalized discharge cell (S113)) determine a voltage difference between the compensated first voltage value of the battery and a reference voltage value ([0067] Fig. 11 , and S13 Controller 15 calculates a voltage difference between the calculated average voltage and the detected voltage of the target cell (S13) “Average voltage” identified as “reference voltage value”). and detect an internal short circuit fault in the battery based on a comparison of a magnitude of the voltage difference of the battery with a threshold ([0045] Controller 15 calculates difference voltage ΔV between the current voltage difference calculated this time and the voltage difference calculated Δt hour(s) (“i.e. threshold”) earlier (S14). [0046] …determines that a minute short circuit has occurred in the target cell (S16)). As to claim 2, Itakura discloses the battery management system according to claim 1, wherein the control circuit is configured to, for each battery: increase a fault count of the battery by 1 in response to the magnitude of the voltage difference of the battery being equal to or larger than the threshold (Fig. 11 , [0047] When difference voltage ΔV calculated in step S15 is greater than or equal to the determination threshold value (Y in S15), controller 15 increments variable a (S151). An initial value of variable a is 0. Based on the value of variable a, controller 15 specifies a number of times N that difference voltage ΔV became greater than or equal to the determination threshold value in the past x (for example, 40) comparative determinations (S152)) detect the internal short circuit fault in the battery in response to the fault count of the battery being equal to or larger than a predetermined value ([0048] controller 15 determines that a minute short circuit has occurred in the target cell (S16)) . As to claim 3, Itakura discloses the battery management system according to claim 1, wherein the reference voltage value is equal to an average or median of the compensated first voltage values of at least two of the plurality of batteries ([0049] [0067] the average voltage) . As to claim 4, Itakura discloses the battery management system according to claim 1, wherein the balancer includes a plurality of balancing circuits connected in parallel to the plurality of batteries in a one-to-one correspondence relationship (Fig. 1 and discharger 11) , and wherein each balancing circuit includes a discharge resistor and a discharge switch connected in series (S1,R1 through S20,R20) . As to claim 5, Itakura discloses the battery management system according to claim 1, wherein the control circuit is configured to determine, for each battery, the balancing capacity of the battery by accumulating a discharge capacity of the battery for each balancing operation within a predetermined period of time ([0066] Controller 15 adds the estimated voltage decrease quantity as compensation value V Δt to the detected voltage of the equalized discharge cell (S113)) preceding the latest reference time ([0046] The above process is repeatedly executed for all the cells included in power storage module M1 while power supply system 1 is in operation (N in S17). . As to claim 6, Itakura discloses the battery management system according to claim 5, wherein the control circuit is configured to determine the discharge capacity of the battery for a given balancing operation by applying a capacity estimation function to first balancing data associated with the given balancing operation (Fig. 11 S112) , and wherein the first balancing data includes a second voltage value indicating the no-load voltage of the battery at a start of the given balancing operation and a duration of the given balancing operation (Fig. 7-8 and Fig. 11 S11-S113 and [0040]-[0041] [0066]. the OCV of the cell with the lowest OCV becomes the target value. When the equalization process is in progress (Y in S111), controller 15 estimates a voltage decrease quantity of the equalized discharge cell in Δt hour(s) (for example, one hour) (S112). Controller 15 adds the estimated voltage decrease quantity as compensation value VΔt to the detected voltage of the equalized discharge cell (S113)). As to claim 7, Itakura discloses the battery management system according to claim 5, wherein the control circuit is configured to determine the discharge capacity of the battery for a given balancing operation (S111-S113) by applying a state of charge (SOC)-open circuit voltage (OCV) mapping ([0060] [0061] and Fig.9 Compensation value VΔt can be estimated based on the SOC-OCV curve) to second balancing data of the given balancing operation, and wherein the second balancing data includes a second voltage value indicating the no-load voltage of the battery at a start of the given balancing operation and a third voltage value indicating the no-load voltage of the battery at an end of the given balancing operation (Fig. 7-8 and Fig. 11 S11-S113 and [0040]-[0041]) . As to claim 8, Itakura discloses the battery management system according to claim 1, wherein the control circuit is configured to, for each battery of the plurality of batteries: determine an estimated SOC of the battery by applying a SOC-OCV mapping to the first voltage value of the battery ([0060] [0061] and Fig.9 Compensation value VΔt can be estimated based on the SOC-OCV curve) , compensate the estimated SOC of the battery by adding a SOC change amount to the estimated SOC of the battery (Fig. 11 S113) , wherein the SOC change amount corresponds to the balancing capacity of the battery (Fig. 11 S113) , and determine the compensated first voltage value by applying the SOC-OCV mapping to the compensated estimated SOC of the battery ([0060] [0061] and Fig.9) . As to claim 9, Itakura discloses the battery pack comprising the battery management system according to claim 1 ([0065] power storage module M1) . As to claim 10, Itakura discloses an electric vehicle comprising the battery pack according to claim 9 ([0027] FIG. 1. Power supply system 1 is mounted on a vehicle) . As to claim 11, Itakura discloses a battery management method, comprising: determining, by a control circuit Fig. 1 controller 15) , a first voltage value indicating a no-load voltage of a battery included among a plurality of batteries connected in series ([0065] and Fig. 11 Voltage detector 12 detects voltages of n cells connected in series and transmits the voltages to controller 15 (S10). [0040] Controller 15 executes an equalization process between the plurality of cells C1 to C20 based on the voltages of the plurality of cells C1 to C20 received from voltage detector 12 (S111)…the OCV of the cell with the lowest OCV becomes the target value.) , compensating, by the control circuit, the first voltage value of the battery using a balancing capacity of the battery at a balancing operation for the plurality of batteries performed at a latest reference time (Fig. 11, S113. [0066] Controller 15 adds the estimated voltage decrease quantity as compensation value V Δt to the detected voltage of the equalized discharge cell (S113) ); determining, by the control circuit, a voltage difference between the compensated first voltage value of the battery and a reference voltage value ([0067] Fig. 11, and S13 Controller 15 calculates a voltage difference between the calculated average voltage and the detected voltage of the target cell (S13) “Average voltage” identified as “reference voltage value”) .; and detecting, by the control circuit, an internal short circuit fault in the battery based on a comparison of a magnitude of the voltage difference of the battery with a threshold ([0045] Controller 15 calculates difference voltage ΔV between the current voltage difference calculated this time and the voltage difference calculated Δt hour(s) (“i.e. threshold”) earlier (S14). [0046] …determines that a minute short circuit has occurred in the target cell (S16)). As to claim 12, Itakura discloses the battery management method according to claim 11, wherein detecting the internal short circuit fault in the battery comprises: increasing, by the control circuit, a fault count of the battery by 1 in response to the magnitude of the voltage difference of the battery being equal to or larger than the threshold (Fig. 11 , [0047] When difference voltage ΔV calculated in step S15 is greater than or equal to the determination threshold value (Y in S15), controller 15 increments variable a (S151). An initial value of variable a is 0. Based on the value of variable a, controller 15 specifies a number of times N that difference voltage ΔV became greater than or equal to the determination threshold value in the past x (for example, 40) comparative determinations (S152)); and detecting, by the control circuit, the internal short circuit fault in the battery in response to the fault count of the battery being equal to or larger than a predetermined value ([0048] controller 15 determines that a minute short circuit has occurred in the target cell (S16)). As to claim 13, Itakura discloses the battery management method according to claim 11, wherein the reference voltage value is an average or median of the compensated first voltage values of at least two of the plurality of batteries ([0049] [0067] the average voltage). As to claim 14, Itakura discloses the battery management method according to claim 11, wherein compensating the first voltage value of the battery comprises: determining, by the control circuit, an estimated state of charge (SOC) of the battery by applying a SOC-open circuit voltage (OCV) mapping to the first voltage value of the battery ([0060] [0061] and Fig.9 Compensation value VΔt can be estimated based on the SOC-OCV curve); compensating, by the control circuit, the estimated SOC of the battery by adding a SOC change amount to the estimated SOC of the battery (Fig. 11 S113), wherein the SOC change amount corresponds to the balancing capacity of the battery (Fig. 11 S113) ; and determining, by the control circuit, the compensated first voltage value by applying the SOC-OCV mapping to the compensated estimated SOC of the battery ([0060] [0061] and Fig.9). As to claim 15, Itakura discloses the battery management method according to claim 11, further comprising, for each battery of the plurality of batteries (Fig. 11 [0046] The above process is repeatedly executed for all the cells included in power storage module M1 while power supply system 1 is in operation (N in S17), determining a respective first voltage value ([0065] and Fig. 11 Voltage detector 12 detects voltages of n cells connected in series and transmits the voltages to controller 15 (S10) , compensating the respective first voltage value of the battery (Fig. 11, S113. [0066] Controller 15 adds the estimated voltage decrease quantity as compensation value V Δt to the detected voltage of the equalized discharge cell (S113) , determining a respective voltage difference using the respective first voltage value ([0067] Fig. 11, and S13 Controller 15 calculates a voltage difference between the calculated average voltage and the detected voltage of the target cell (S13) “Average voltage” identified as “reference voltage value”) , and detecting an internal short circuit fault based on a magnitude of the respective voltage difference ([0045] Controller 15 calculates difference voltage ΔV between the current voltage difference calculated this time and the voltage difference calculated Δt hour(s) (“i.e. threshold”) earlier (S14). [0046] …determines that a minute short circuit has occurred in the target cell (S16)). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to TYNESE V MCDANIEL whose telephone number is (313)446-6579. The examiner can normally be reached on M to F, 9am to 530pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Taelor Kim can be reached at 571-270-7166. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /TYNESE V MCDANIEL/Primary Examiner, Art Unit 2859 Application/Control Number: 18/267,161 Page 2 Art Unit: 2859 Application/Control Number: 18/267,161 Page 3 Art Unit: 2859 Application/Control Number: 18/267,161 Page 4 Art Unit: 2859 Application/Control Number: 18/267,161 Page 5 Art Unit: 2859 Application/Control Number: 18/267,161 Page 6 Art Unit: 2859 Application/Control Number: 18/267,161 Page 7 Art Unit: 2859 Application/Control Number: 18/267,161 Page 8 Art Unit: 2859 Application/Control Number: 18/267,161 Page 9 Art Unit: 2859 Application/Control Number: 18/267,161 Page 10 Art Unit: 2859
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Prosecution Timeline

Jun 14, 2023
Application Filed
Apr 23, 2026
Non-Final Rejection mailed — §102
Jul 23, 2026
Response Filed
Sep 29, 2026
Final Rejection mailed — §102 (current)

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Prosecution Projections

3-4
Expected OA Rounds
59%
Grant Probability
75%
With Interview (+16.2%)
3y 4m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 374 resolved cases by this examiner. Grant probability derived from career allowance rate.

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