Improved battery protection circuit and system
A protection circuit and improved technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of inability to output such a large current, high power consumption of audio power amplifier circuits, and inability to achieve protection actions.
Active Publication Date: 2016-06-15
WUXI ZGMICRO ELECTRONICS CO LTD
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Problems solved by technology
However, for some more complex systems, such as Bluetooth speakers, sometimes users need a special high-power drive. In order to increase the output volume of the Bluetooth speaker, an additional audio power amplifier is required, and this audio power amplifier circuit consumes a lot of power. The existing high-integration Generally, the chip cannot output such a large current. If the audio power amplifier circuit takes power directly from the battery, when the battery is in an overvoltage discharge state or an overcurrent discharge state, the protection action of prohibiting discharge cannot be realized.
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[0021] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. Unless otherwise specified, the words connected, connected, and joined in this document mean that they are electrically connected directly or indirectly.
[0023] Please refer to figure 1 As shown, it is a schematic circuit diagram of a battery protection system in an embodiment of the present invention. figure 1 The battery...
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The invention provides an improved battery protection circuit and system. The improved battery protection circuit comprises a low voltage detection circuit, a switch, a discharging switch tube, an overcurrent detection circuit and a logic control circuit. The switch is connected between one end of a power-on button and the cathode of an electrical core, and the other end of the power-on button is connected with the anode of the electrical core; the input end of the low voltage detection circuit is connected with the electrical core, and the output end of the low voltage detection circuit is connected with the control end of the switch; a first connecting end of the discharging switch tube is connected with the cathode of the electrical core, a second connecting end of the discharging switch tube is connected with a second power end, and a first power end is connected with the anode of the electrical core; and the first input end of the logic control circuit is connected with the output end of the overcurrrent detection circuit, the second input end of the logic control circuit is connected with the output end of the low voltage detection circuit, and the output end of the logic control circuit is connected with the control end of the discharging switch tube. Compared with the prior art, a battery can be completely protected if there is a discharging module which takes electricity from the electrical core directly in the system.
Description
【Technical field】 [0001] The invention relates to the technical field of battery protection, in particular to an improved battery protection circuit and system. 【Background technique】 [0002] A new type of battery protection circuit and system in the prior art. For smaller electronic systems, such as Bluetooth headsets, all systems are integrated on the same chip, and all system power supplies are monitored by the chip. Its battery protection function is complete. However, for some more complex systems, such as Bluetooth speakers, sometimes users need a special high-power drive. In order to increase the output volume of the Bluetooth speaker, an additional audio power amplifier is required, and this audio power amplifier circuit consumes a lot of power. The existing high-integration High-speed chips generally cannot output such a large current. If the audio power amplifier circuit takes power directly from the battery, when the battery is in an over-voltage discharge state...
Claims
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IPC IPC(8): H02H7/18
CPCH02H7/18
Inventor 王钊
Owner WUXI ZGMICRO ELECTRONICS CO LTD