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公开(公告)号：US10677849B2
公开(公告)日：2020-06-09
申请号：US15846774
申请日：2017-12-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： John M. Moote , Vijay P. Saharan , Patrick M. Hanley , Edgar P. Calderon
IPC: G01R31/36 , H01M10/42 , G01N27/02 , G01N27/20 , G01R31/374 , G01R31/385
Abstract: An electrochemical cell comprises an electrolyte capable of facilitating ion transfer between an anode and a cathode. A method for identifying and/or characterizing a soft short in an electrochemical cell comprises cooling the electrochemical cell to an observation temperature at which inter-electrolyte ion migration is substantially inhibited, observing the open circuit voltage (OCV) of the electrochemical cell at the observation temperature for a period of time, and determining the presence of a soft short in the electrochemical cell if the OCV reaches a minimum threshold voltage prior to the expiration of the period of time. The method can optionally further include generating an impedance spectrum for the cell via potentiostatic electrochemical impedance spectroscopy (PETS) at or below the observation temperature, and defining the cell leakage resistance as the maximum impedance limit of the impedance spectrum. The observation temperature can comprise the glass transition temperature of the electrolyte.
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公开(公告)号：US20190187216A1
公开(公告)日：2019-06-20
申请号：US15846774
申请日：2017-12-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： John M. Moote , Vijay P. Saharan , Patrick M. Hanley , Edgar P. Calderon
Abstract: An electrochemical cell comprises an electrolyte capable of facilitating ion transfer between an anode and a cathode. A method for identifying and/or characterizing a soft short in an electrochemical cell comprises cooling the electrochemical cell to an observation temperature at which inter-electrolyte ion migration is substantially inhibited, observing the open circuit voltage (OCV) of the electrochemical cell at the observation temperature for a period of time, and determining the presence of a soft short in the electrochemical cell if the OCV reaches a minimum threshold voltage prior to the expiration of the period of time. The method can optionally further include generating an impedance spectrum for the cell via potentiostatic electrochemical impedance spectroscopy (PETS) at or below the observation temperature, and defining the cell leakage resistance as the maximum impedance limit of the impedance spectrum. The observation temperature can comprise the glass transition temperature of the electrolyte.
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公开(公告)号：US20170322251A1
公开(公告)日：2017-11-09
申请号：US15266213
申请日：2016-09-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Evan J. Dawley , Edgar P. Calderon , Cammi L. Siu , Lance W. Turner
CPC classification number: G01R31/046 , G01N3/30 , G01N3/34 , G01N3/36 , G01N2203/0039 , G01N2203/0617 , G01R31/3644 , G01R31/44
Abstract: A method and a test fixture for evaluating a junction between an electrical lead trace and a busbar are described, and include an electric power supply disposed to supply electric power to the electrical lead trace and an electric monitoring device disposed to monitor electrical potential across the junction. A mechanical stress-inducing device is disposed to apply mechanical stress proximal to the junction. The electric monitoring device monitors the electrical potential across the junction of the electrical lead trace coincident with the mechanical stress-inducing device applying mechanical stress proximal to the junction when the electric power supply is supplying electric power to the electrical lead trace. Electrical integrity of the junction is evaluated based upon the monitored electrical potential across the junction.
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4.发明授权Systems and methods for determining battery state information based on internal battery pressure 有权基于内部电池压力确定电池状态信息的系统和方法公开(公告)号：US09573484B2
公开(公告)日：2017-02-21
申请号：US14163584
申请日：2014-01-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Herman K. Phlegm , Andrew J. Namou , Edgar P. Calderon , Lisa J. Gross
CPC classification number: B60L11/1862 , B60L3/0007 , B60L3/0046 , B60L11/1857 , B60L2240/54 , H01M2/02 , H01M10/48
Abstract: Systems and methods for monitoring a state of a battery system based on information related to a measured pressure within the battery system are presented. In certain embodiments, the disclosed systems and methods may utilize a pressure-sensitive smart foam material in connection with measuring a pressure within the battery system. Based on the measured pressure information, a variety of information relating to the battery system may be determined. For example, information relating to a state of a battery system, certain events occurring within the battery system, and/or battery lifecycle information may be determined based on the measured pressure information.
Abstract translation: 提出了基于与电池系统内的测量压力相关的信息监测电池系统的状态的系统和方法。 在某些实施例中，所公开的系统和方法可以与测量电池系统内的压力相关联地使用压敏智能泡沫材料。 基于测量的压力信息，可以确定与电池系统有关的各种信息。 例如，可以基于所测量的压力信息来确定与电池系统的状态，电池系统中发生的某些事件和/或电池寿命周期信息有关的信息。
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公开(公告)号：US11183721B2
公开(公告)日：2021-11-23
申请号：US16595737
申请日：2019-10-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Elaine E. Parkanzky , Karl C. Dorgan , Faruk Sohag , Rajesh K. Bhagirath , Edgar P. Calderon , John M. Moote
IPC: H01M10/38 , H01M10/6569 , H01M10/658 , H01M10/613 , H05K7/20
Abstract: A thermal barrier for use in a power module assembly having at least one battery cell and corresponding method of forming. The thermal barrier includes at least one compressible member having one or more pockets. A first layer and a second layer are positioned adjacent to the compressive member at a first side and a second side, respectively. The thermal barrier includes one or more phase change materials configured to be deposited into the pockets. The phase change materials are configured to undergo an endothermic phase change reaction when a temperature is at or above an activation temperature. The first layer and the second layer may be configured to at least partially reflect radiant heat. In one example, the phase change materials include a bicarbonate salt.
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Patent Agency Ranking
公开(公告)号：US20180231368A1
公开(公告)日：2018-08-16
申请号：US15434137
申请日：2017-02-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Edgar P. Calderon , Roger M. Brisbane , Herman K. Phlegm
Abstract: A method of leak testing a fluid passage of a part manufactured from a low conductivity material includes measuring an electrical resistance between an interior wall surface of the fluid passage of the part, and an exterior wall surface of the fluid passage of the part. The measured electrical resistance is compared to a threshold value to determine if the measured electrical resistance is equal to or greater than the threshold value, or if the measured electrical resistance is less than the threshold value. The threshold value is equal to a nominal wall thickness of the fluid passage multiplied by a resistivity of the material used to form the part. The part passes the leak test when the measured electrical resistance is equal to or greater than the threshold value. The part fails the leak test when the measured electrical resistance is less than the threshold value.
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公开(公告)号：US20230299365A1
公开(公告)日：2023-09-21
申请号：US17695985
申请日：2022-03-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Herman K. Phlegm , Srikanth Arisetty , Rajesh K. Bhagirath , Edgar P. Calderon
IPC: H01M10/42 , H01M50/367 , H01M10/48
CPC classification number: H01M10/4207 , H01M50/367 , H01M10/482
Abstract: A method for constant pressure regulation of battery cells includes disposing the cells in a stacked arrangement within a battery cell placement volume of an apparatus configured to maintain a constant pressure on the cells, providing a gas pressure within a chamber of the apparatus, thereby causing an initial pressure to be applied on the battery cells, and detecting an expansion of the battery cells during a predetermined timespan using a linear displacement sensor. During the predetermined timespan, if the detected expansion is less than a maximum allowable expansion minus a predetermined measurement error, then the gas pressure within the chamber is increased, and if the detected expansion is greater than the maximum allowable expansion plus the predetermined measurement error, then the gas pressure within the chamber is decreased. An apparatus for constant pressure regulation of battery cells is also provided.
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公开(公告)号：US10564064B2
公开(公告)日：2020-02-18
申请号：US15434137
申请日：2017-02-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Edgar P. Calderon , Roger M. Brisbane , Herman K. Phlegm
Abstract: A method of leak testing a fluid passage of a part manufactured from a low conductivity material includes measuring an electrical resistance between an interior wall surface of the fluid passage of the part, and an exterior wall surface of the fluid passage of the part. The measured electrical resistance is compared to a threshold value to determine if the measured electrical resistance is equal to or greater than the threshold value, or if the measured electrical resistance is less than the threshold value. The threshold value is equal to a nominal wall thickness of the fluid passage multiplied by a resistivity of the material used to form the part. The part passes the leak test when the measured electrical resistance is equal to or greater than the threshold value. The part fails the leak test when the measured electrical resistance is less than the threshold value.
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公开(公告)号：US09459325B2
公开(公告)日：2016-10-04
申请号：US14099640
申请日：2013-12-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Edgar P. Calderon , Gregory J. Rushlow , Hayley Hanchett , Jack Cravener
IPC: G01N27/416 , G01R31/36
CPC classification number: G01R31/3627 , G01R31/3658
Abstract: Systems and methods for scanning a battery cell to identify internal faults are disclosed. In certain embodiments, a method for scanning a battery cell for faults may comprise generating an input signal across first and second charge plates disposed on each side of the battery cell. An open circuit voltage of the battery cell generated in response to the input signal may be measured. The measured open circuit voltage may be compared with a reference signal associated with a reference battery cell having no faults. Based on the comparison, a fault and/or a possible fault within the battery cell being scanned may be identified.
Abstract translation: 公开了用于扫描电池单元以识别内部故障的系统和方法。 在某些实施例中，用于扫描电池单元以用于故障的方法可以包括跨越设置在电池单元的每一侧上的第一和第二充电板产生输入信号。 可以测量响应于输入信号而产生的电池单元的开路电压。 测量的开路电压可以与与没有故障的参考电池单元相关联的参考信号进行比较。 基于该比较，可以识别正被扫描的电池单元内的故障和/或可能的故障。
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公开(公告)号：US20210104793A1
公开(公告)日：2021-04-08
申请号：US16595737
申请日：2019-10-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Elaine E. Parkanzky , Karl C. Dorgan , Faruk Sohag , Rajesh K. Bhagirath , Edgar P. Calderon , John M. Moote
IPC: H01M10/6569 , H05K7/20 , H01M10/613 , H01M10/658
Abstract: A thermal barrier for use in a power module assembly having at least one battery cell and corresponding method of forming. The thermal barrier includes at least one compressible member having one or more pockets. A first layer and a second layer are positioned adjacent to the compressive member at a first side and a second side, respectively. The thermal barrier includes one or more phase change materials configured to be deposited into the pockets. The phase change materials are configured to undergo an endothermic phase change reaction when a temperature is at or above an activation temperature. The first layer and the second layer may be configured to at least partially reflect radiant heat. In one example, the phase change materials include a bicarbonate salt.
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