Secondary battery protective chip
A technology for rechargeable batteries and chip protection, applied in protection against overcurrent, protection against overvoltage, emergency protection circuit devices, etc. question
Inactive Publication Date: 2011-05-18
曹先国
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Problems solved by technology
[0003] Existing rechargeable battery protection circuits such as figure 1 As shown, it consists of two chips, the control IC1 and the MOS power switch tube (consisting of 10 and 11). The control IC of the battery protection circuit monitors the voltage of the battery and controls the gates of the two MOS tubes. Carry out overcharge control, overdischarge control and overcurrent control separately, without integrating the control IC and MOS tube power switch tube into the same integrated block, and at the same time, the control of the delay control part is realized by using an external capacitor, which increases the The peripheral components of the chip are removed, the production process increases, the production cycle is long, the cost increases, the reliability decreases, and the size of the protection circuit increases
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[0020] Now examine the accompanying drawings, figure 2 It is a diagram showing the internal system structure of the rechargeable battery protection chip of the present invention. Such as figure 2 In the shown invention, the rechargeable battery protection chip includes a second MOS power switch tube 2, an overcharge voltage detection control circuit module 3, an overdischarge voltage detection control circuit module 4, a twelfth delay control circuit module 5, and an eleventh delay control circuit module. The charging detection circuit module 6, the tenth short circuit detection control circuit module 7, the eighth overcharge current detection control circuit module 8, the ninth overdischarge current detection control circuit module 9, the sixteenth precise clock generation and control circuit module 10, the eighth Fifteenth temperature sensor circuit module 11, thirteenth logic control circuit 12, fourteenth low voltage high control circuit module 13, battery positive powe...
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The invention discloses a protective integrated circuit chip for charging battery, which is characterized by the following: integrating IC and MOS power switch pipe on one chip; detecting to control the overcharge voltage, overdischarge voltage, overcharge current, overdischarge current; proceeding short-circuit protection; controlling temperature sensor; controlling clock precisely; proceeding trickle charging control; fitting for packing super-large current technology; protecting charging battery; reducing peripheral circuit elements; minimizing circuit bulk.
Description
technical field [0001] The invention relates to a protection integrated circuit chip for a rechargeable battery. In particular, it relates to a method that integrates overcharge voltage detection control, overdischarge voltage detection control, overcharge current detection control, overdischarge current detection control, short circuit protection, temperature sensor, precise clock control, MOS tube power switch and trickle charge The control and other functional blocks are integrated on the same integrated circuit chip, and the rechargeable battery protection chip with super-high current technology is realized with conventional packaging, which plays a good role in protecting the rechargeable battery. Background technique [0002] It is well known that rechargeable batteries have the advantages of high energy, high voltage, long life and other power sources that cannot be compared with other power sources. In battery-powered portable electronic products, especially in the f...
Claims
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IPC IPC(8): H02H7/18H02H3/08H02H3/20
Inventor 曹先国
Owner 曹先国