-
公开(公告)号：US20200313152A1
公开(公告)日：2020-10-01
申请号：US16410714
申请日：2019-05-13
发明人： Anna G. Stefanopoulou , Jason B. Siegel , Sravan Pannala , Gregory B. Less , Ting Cai , Mingxuan Zhang
IPC分类号： H01M2/34 , G01R31/52 , H01M10/42 , H01M10/48 , G01R31/36 , G01R31/3842 , B60L58/12 , H01M10/0525
摘要： An electrical device comprises a battery cell; a pressure sensor for measuring swelling forces of the battery cell, optionally with voltage, temperature and current sensors, and a battery management system including a controller. The controller executes a program to: (i) determine a reference swelling force corresponding to a reference electrical signal received from the pressure sensor at an earlier reference time, (ii) determine a second swelling force corresponding to a second electrical signal received from the pressure sensor at a later second time, and (iii) determine whether a risk of internal short circuit of the battery cell exists by comparing a reference level of the reference electrical signal and a signal representative of the second electrical signal. When the signal representative of the second electrical signal exceeds the reference level of the reference electrical signal by a threshold amount, a risk of internal short circuit of the cell exists.
-
公开(公告)号：US11623526B2
公开(公告)日：2023-04-11
申请号：US15777384
申请日：2016-11-18
摘要： There is disclosed an electrical device including a battery, and a battery management system. The battery management system includes a controller in electrical communication with a pressure sensor to monitor the state of health of the battery. The controller applies a method for determining the state of health that uses a non-electrical (mechanical) signal of force measurements combined with incremental capacity analysis to estimate the capacity fading and other health indicators of the battery with better precision than existing methods. The pressure sensor may provide the force measurement signal to the controller, which may determine which incremental capacity curve based on force to use for the particular battery. The controller then executes a program utilizing the data from the pressure sensor and the stored incremental capacity curves based on force to estimate the capacity fading and signal a user with the state of health percentage.
-
公开(公告)号：US20210359347A1
公开(公告)日：2021-11-18
申请号：US17265774
申请日：2019-08-06
IPC分类号： H01M10/42 , H01M10/0525 , H01M10/48
摘要： The present disclosure provides an electrical device including a battery cell, a voltage sensor operatively coupled to the battery cell in order to measure a voltage level of the battery cell, a current sensor operatively coupled to the battery cell in order to measure an amount of current drawn from or supplied to the battery cell, and a battery management system (BMS). The battery management system includes a controller In communication with the voltage sensor and the current sensor. The controller is configured to execute a program stored in the BMS to calculate a state of health of the individual battery electrodes comprising a battery cell using a first differential voltage point, a second differential voltage point, and a characteristic curve of a fresh battery electrode of a fresh battery cell, wherein the battery cell includes a second battery electrode not exhibiting distinct phase transitions during a charge-discharge cycle.
-
公开(公告)号：US20220123559A1
公开(公告)日：2022-04-21
申请号：US17503478
申请日：2021-10-18
发明人： Anna G. Stefanopoulou , Jason B. Siegel , Ting Cai
IPC分类号： H02J7/00 , G01R31/371 , G09B5/02 , G06F3/14 , G06K7/14
摘要： Disclosed is a system and method for detecting, assessing, and displaying a battery fault, such as an internal short circuit in a battery cell. The system includes a battery; a sensor for outputting a sensor signal correlating to a measurement of a chemical, electrical, or physical property of the battery; and a controller in electrical communication with the sensor and a display device. The controller is configured to execute a program stored in the controller to: (i) detect and assess a fault in the battery based on the sensor signal, and (ii) transmit a display signal to the display device such that the display device produces an image indicative of the presence or the absence of a fault in the battery. The display device can be a virtual reality headset to be used for first responders and other beneficiaries for an electric vehicle fire.
-
公开(公告)号：US20150147608A1
公开(公告)日：2015-05-28
申请号：US14403057
申请日：2013-05-23
申请人： The Regents of the University of Michigan , United States of America, as represented by the Secretary of the Army, Washington, D.C.
IPC分类号： H01M10/48 , G01R31/36 , G01K7/42 , H01M10/052
CPC分类号： H01M10/486 , G01K7/42 , G01R31/3648 , G01R31/3662 , H01M10/052 , H01M10/482 , H01M10/633 , H01M10/6557 , Y02T10/7011
摘要： A method and a system of estimating core temperatures of battery cells in a battery pack can include several steps. In one step, a surface temperature of one or more battery cell(s) is received, a current of the one or more battery cell(s) is received, an inlet temperature of coolant provided to the battery pack is received, and a flow rate or velocity of the coolant is received. In another step, estimations are made including those of a cell-lumped internal electrical resistance of the battery cell(s), a cell-lumped conduction resistance between a core and a surface of the battery cell(s), and a cell-lumped convection resistance between the surface and the coolant. In yet another step, an estimation is made of a core temperature of the battery cell(s) based upon the received and estimated values of previous steps.
摘要翻译： 估计电池组中的电池单元的核心温度的方法和系统可以包括几个步骤。 在一个步骤中，接收一个或多个电池单元的表面温度，接收一个或多个电池单元的电流，接收提供给电池组的冷却剂的入口温度，并且流动 接收冷却剂的速度或速度。 在另一步骤中，进行估计，包括电池单体的电池集中的内部电阻，芯和电池单元的表面之间的电池集中的导通电阻，以及电池集合 表面与冷却液之间的对流电阻。 在另一步骤中，基于先前步骤的接收和估计值来估计电池单元的核心温度。
-
公开(公告)号：US11355824B2
公开(公告)日：2022-06-07
申请号：US16410714
申请日：2019-05-13
发明人： Anna G. Stefanopoulou , Jason B. Siegel , Sravan Pannala , Gregory B. Less , Ting Cai , Mingxuan Zhang
IPC分类号： H01M50/578 , G01R31/52 , H01M10/42 , H01M10/48 , G01R31/3842 , B60L58/12 , H01M10/0525 , G01R31/36
摘要： An electrical device comprises a battery cell; a pressure sensor for measuring swelling forces of the battery cell, optionally with voltage, temperature and current sensors, and a battery management system including a controller. The controller executes a program to: (i) determine a reference swelling force corresponding to a reference electrical signal received from the pressure sensor at an earlier reference time, (ii) determine a second swelling force corresponding to a second electrical signal received from the pressure sensor at a later second time, and (iii) determine whether a risk of internal short circuit of the battery cell exists by comparing a reference level of the reference electrical signal and a signal representative of the second electrical signal. When the signal representative of the second electrical signal exceeds the reference level of the reference electrical signal by a threshold amount, a risk of internal short circuit of the cell exists.
-
公开(公告)号：US10422293B2
公开(公告)日：2019-09-24
申请号：US15573388
申请日：2016-05-13
摘要： A method and apparatus to predict and enable control of misfire that influences combustion cyclic variation and COV of IMEP in spark-ignited (SI) engine. The method includes obtaining engine data and determining temperature and pressure within a cylinder in response to engine data; determining crank angle resolved flame velocity evolution based on the engine data; comparing the crank angle resolved flame velocity to predetermined turbulent combustion regime data to determine a misfire occurrence; and updating a misfire occurrence indicator and outputting a control signal when the misfire occurrence indicator is greater than a predetermined limit, the control signal being capable of adjusting any engine actuators, such as external ignition source, of the spark-ignited engine on a cycle to cycle basis. The method and apparatus further includes correlating the crank angle resolved flame velocity to combustion phasing when the misfire occurrence indicator is less than the predetermined limit.
-
公开(公告)号：US10230137B2
公开(公告)日：2019-03-12
申请号：US14403057
申请日：2013-05-23
申请人： The Regents of the University of Michigan , The United States of America, as represented by the Secretary of the Army, Washington, D.C.
IPC分类号： H01M10/48 , H01M10/052 , G01K7/42 , G01R31/36 , H01M10/633 , H01M10/6557
摘要： A method and a system of estimating core temperatures of battery cells in a battery pack can include several steps. In one step, a surface temperature of one or more battery cell(s) is received, a current of the one or more battery cell(s) is received, an inlet temperature of coolant provided to the battery pack is received, and a flow rate or velocity of the coolant is received. In another step, estimations are made including those of a cell-lumped internal electrical resistance of the battery cell(s), a cell-lumped conduction resistance between a core and a surface of the battery cell(s), and a cell-lumped convection resistance between the surface and the coolant. In yet another step, an estimation is made of a core temperature of the battery cell(s) based upon the received and estimated values of previous steps.
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.02 秒)
