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公开(公告)号：US11901751B2
公开(公告)日：2024-02-13
申请号：US17319815
申请日：2021-05-13
Applicant: Google LLC
Inventor： Michael Jonathon Chen , William Alan Saperstein , James Robert Lim , David Wang
CPC classification number: H02J7/00308 , H02J7/0031 , H02J7/00302 , H02J7/007182
Abstract: An indexed sequence of bits in a buffer is allocated for tracking a battery charging state. The indexed sequence of bits has a first number of bits. A battery voltage of a rechargeable battery is sampled at a sampling rate. For each sampled battery voltage, the battery voltage is compared with a voltage threshold. A next bit position in the indexed sequence of bits is identified. In accordance with a determination that a comparison result is true, a predefined first value is added to the next bit position. A second number of bits that are filled with the predefined first value is determined. A ratio between the second number and the first number is also determined. In accordance with a determination that the ratio exceeds a threshold step-down ratio, a battery charge voltage is stepped down. The rechargeable battery is charged to a step-down voltage.
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公开(公告)号：US20230246470A1
公开(公告)日：2023-08-03
申请号：US18159553
申请日：2023-01-25
Applicant: Google LLC
Inventor： James Robert Lim , David Wang , Haoxing Zhang , Shang Shi
IPC: H02J7/00 , G01R19/165 , G01R31/3835
CPC classification number: H02J7/007182 , H02J7/0029 , G01R19/16542 , G01R31/3835
Abstract: The present document describes battery zero-voltage (0V) detection methodologies and applications thereof. These techniques detect the occurrence of the 0V condition and enable the device to continue operation after one 0V condition. These techniques may, however, shut down the device after detecting a second occurrence of the 0V condition of the battery. In an aspect, a combination of hardware and software is used at a system side of a device, when the device is connected to an external power source, to detect a 0V condition and/or distinguish the 0V condition from an undervoltage-protection (UVP) condition.
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公开(公告)号：US11637434B2
公开(公告)日：2023-04-25
申请号：US17222230
申请日：2021-04-05
Applicant: Google LLC
Inventor： James Robert Lim , David Wang , Bonnie Yip , Haoxing Zhang
Abstract: This application is directed to a battery protection system including a sense resistor, a comparator, a switching component, and a protection integrated circuit (PIC). The sense resistor is electrically coupled in series with one of a plurality of rechargeable battery cells that are coupled in parallel in a battery. The comparator is coupled to the sense resistor and configured to compare a voltage drop across the sense resistor with a reference voltage to determine whether a subset of the rechargeable battery cells is not charging in the battery. The switching component is coupled to the battery, while the PIC is coupled to the comparator and the switching component. The PIC is configured to control charging and discharging of the battery including disabling the battery from being charged in accordance with a determination that a subset of the rechargeable battery cells is not charging in the battery.
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公开(公告)号：US20220285741A1
公开(公告)日：2022-09-08
申请号：US17194480
申请日：2021-03-08
Applicant: Google LLC
Inventor： James Robert Lim , Wei Li , Brian Conner , Brett Wilson
Abstract: An example outdoor mounted device includes a first battery configured to operate at a low temperature range that at least includes negative 20 Celsius; a second battery configured to operate at a high temperature range; a temperature sensor; and processing circuitry configured to: determine, based on data received from the temperature sensors, a current temperature; responsive to determining that the current temperature is within the low temperature range, cause one or more components of the computing device to operate using electrical energy sourced from the first battery; and responsive to determining that the current temperature is within the high temperature range, cause the one or more components of the computing device to operate using electrical energy sourced from the second battery.
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公开(公告)号：US20220102691A1
公开(公告)日：2022-03-31
申请号：US17032685
申请日：2020-09-25
Applicant: Google LLC
Inventor： David Wang , Lauren Francine Chanen , James Robert Lim , Neha Ravi Dixit , Alexander P. Wroblewski
Abstract: A battery pack includes a battery, an outer enclosure housing the battery to form a battery pack, and an expandable portion extending from the outer enclosure and allowing the battery pack to expand along an X-axis of the battery pack. The expandable portion includes an inner portion, an outer portion, and a gap portion between the inner portion and the outer portion. The inner portion and the outer portion have a sealing layer to seal off an interior space and the gap portion is devoid of the sealing layer. The sealing layer allows for fluid communication between the gap portion and the interior space when a pressure exerted on the sealing layer exceeds a pressure threshold. The expandable portion includes folds allowing the expandable portion to fold toward the battery pack in an initial folded configuration and expand away from the battery pack in an at least partially unfolded configuration.
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Patent Agency Ranking
公开(公告)号：US20220099606A1
公开(公告)日：2022-03-31
申请号：US17032679
申请日：2020-09-25
Applicant: Google LLC
Inventor： David Wang , Arun Raghupathy , James Robert Lim , Ihab A. Ali , Chang Hong Ye
IPC: G01N25/72 , G01R31/392 , G01R31/371
Abstract: A battery pack includes a battery, a first temperature sensor configured to provide a first temperature value associated with a temperature of the battery, a heat source disposed proximate to the battery and configured to heat the battery, a second temperature sensor configured to provide a second temperature value associated with a temperature of the heat source, and a control board coupled to the first temperature sensor and the second temperature sensor, wherein the control board is configured to receive the first temperature value and the second temperature value. The control board is configured to compare the first temperature value and the second temperature value to determine a temperature gradient between the battery and the heat source and transmit an alert if the temperature gradient exceeds a first temperature gradient threshold.
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公开(公告)号：US20240356357A1
公开(公告)日：2024-10-24
申请号：US18253288
申请日：2022-10-26
Applicant: Google LLC
Inventor： James Robert Lim , Chang Hong Ye , David Wang , Yuandan Li
IPC: H02J7/00
CPC classification number: H02J7/007194 , H02J7/0048 , H02J7/005 , H02J7/0069
Abstract: The present document describes techniques for extending battery life after long-term and high-temperature storage. These techniques delay charging of a battery to detect battery conditions and determine whether the battery was exposed to high temperatures while in an idle or low-power state for a long period of time. These techniques include a methodology to relax and refresh an anode surface of the battery, after high-temperature storage, through distinct and tailored discharges prior to beginning a normal charge profile. These techniques can be applied to a wide range of chemistry platforms, which may have kinetic (Li-ion) limitations, to extend the longevity of the battery by reducing lithium plating and capacity degradation caused by long-term, high-temperature storage.
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公开(公告)号：US20240222714A1
公开(公告)日：2024-07-04
申请号：US18606897
申请日：2024-03-15
Applicant: Google LLC
Inventor： James Robert Lim , Wei Li , Brian Conner , Brett Wilson
CPC classification number: H01M10/425 , H01M10/482 , H01M10/486 , H01M2010/4271
Abstract: An example outdoor mounted device includes a first battery configured to operate at a low temperature range that at least includes negative 20 Celsius; a second battery configured to operate at a high temperature range; a temperature sensor; and processing circuitry configured to: determine, based on data received from the temperature sensors, a current temperature; responsive to determining that the current temperature is within the low temperature range, cause one or more components of the computing device to operate using electrical energy sourced from the first battery; and responsive to determining that the current temperature is within the high temperature range, cause the one or more components of the computing device to operate using electrical energy sourced from the second battery.
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公开(公告)号：US20230344099A1
公开(公告)日：2023-10-26
申请号：US18173607
申请日：2023-02-23
Applicant: Google LLC
Inventor： James Robert Lim , Pinci Liao , Chih-Min Chien , Chien-Yueh Tung
IPC: H01M50/597 , H01R13/64 , H01R13/62 , H01M10/42
CPC classification number: H01M50/597 , H01R13/64 , H01R13/6205 , H01M10/425
Abstract: The present document describes techniques associated with a blind battery connector. The blind battery connector described herein enables a user to blindly engage, safely and securely, a battery connector with a system-side connector. In aspects, the blind battery connector includes polarity-oriented magnets at both the battery connector and the system-side connector to automatically align and engage the battery connector with the system-side connector with correct orientation. The magnets may be embedded or removably assembled to the battery connector and the system-side connector. The blind battery connector controls initial alignment of the battery connector for coupling with the system-side connector and provides additional mechanical strength to the coupling against drop, vibration, and shock. The techniques described herein may decrease battery connection time at factory assembly, increase units per hour, and lower operating costs, while decreasing the likelihood of battery connector damage and/or reverse polarity engagement.
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公开(公告)号：US20230304951A1
公开(公告)日：2023-09-28
申请号：US18312477
申请日：2023-05-04
Applicant: Google LLC
Inventor： David Wang , Arun Raghupathy , James Robert Lim , Ihab A. Ali , Chang Hong Ye
IPC: G01N25/72 , G01R31/371 , G01R31/392
CPC classification number: G01N25/72 , G01R31/371 , G01R31/392
Abstract: A battery pack includes a battery, a first temperature sensor configured to provide a first temperature value associated with a temperature of the battery, a heat source disposed proximate to the battery and configured to heat the battery, a second temperature sensor configured to provide a second temperature value associated with a temperature of the heat source, and a control board coupled to the first temperature sensor and the second temperature sensor, wherein the control board is configured to receive the first temperature value and the second temperature value. The control board is configured to compare the first temperature value and the second temperature value to determine a temperature gradient between the battery and the heat source and transmit an alert if the temperature gradient exceeds a first temperature gradient threshold.
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