US 12,334,519 B2
Battery and automotive diagnostic tablet
Huaming Chen, Guangdong (CN); Weikang Wang, Guangdong (CN); and Honghua Lu, Guangdong (CN)
Assigned to AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Shenzhen (CN)
Filed by AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Guangdong (CN)
Filed on Mar. 25, 2022, as Appl. No. 17/656,471.
Application 17/656,471 is a continuation of application No. PCT/CN2020/118154, filed on Sep. 27, 2020.
Claims priority of application No. 201910940281.1 (CN), filed on Sep. 30, 2019.
Prior Publication US 2022/0216528 A1, Jul. 7, 2022
Int. Cl. H02J 7/00 (2006.01); G01R 31/3842 (2019.01); G01R 31/396 (2019.01); H01M 10/42 (2006.01)
CPC H01M 10/4257 (2013.01) [G01R 31/3842 (2019.01); G01R 31/396 (2019.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A battery, comprising a battery cell, a negative electrode interface, and a positive electrode interface, the positive electrode of the battery cell being connected to the positive electrode interface, wherein the battery further comprises:
a first resistor, wherein one end of the first resistor is connected to the negative electrode of the battery cell, and the other end of the first resistor is connected to the negative electrode interface;
a thermistor:
a switching circuit; and
a protection chip comprising a power detection end, a resistance detection end, a positive electrode voltage end, a negative electrode voltage end, and an execution end, a current detection end, and a communication interface, wherein
the power detection end is connected to the first resistor, and
the protection chip is configured to detect power information of the battery cell via the power detection end, and send the power information to a microprocessor via the communication interface, and
the resistance detection end is connected to the thermistor, and
the protection chip is configured to detect a resistance value of the thermistor in the battery cell via the resistance detection end, and control the switching circuit to switch off when a detected resistance value is not within a preset resistance value range, and
an input end of the switching circuit is connected to the positive electrode of the battery cell, and an output end of the switching circuit is connected to the positive electrode interface, and
the execution end of the protection chip is connected to a control end of the switching circuit, the positive electrode voltage end and the negative electrode voltage end are respectively connected to the positive electrode of the battery cell and the negative electrode of the battery cell,
when it is detected that a voltage of the battery cell is higher than a first preset voltage, the protection chip controls the switching circuit to be in a first state via the execution end, wherein when the switching circuit is in the first state, current of the the switching circuit does not flow from the positive electrode interface to the battery cell, but the current of the switching circuit flows from the battery cell to the positive electrode interface,
when it is detected that the voltage of the battery cell is lower than a second preset voltage, the protection chip controls the switching circuit to be in a second state via the execution end, wherein when the switching circuit is in the second state, the current of the switching circuit flows from the positive electrode interface to the battery cell, but the current of the switching circuit does not flow from the battery cell to the positive electrode interface, and
the current detection end is connected to a link between the switching circuit and the positive electrode interface, and
the protection chip is configured to control the switching circuit to be in the second state via the execution end when the current detection end detects that the current of the switching circuit is greater than a preset current.