Battery overcurrent protection circuit and battery overcurrent protection method
An overcurrent protection circuit and circuit current technology, applied in the field of lithium electronics, can solve problems such as affecting system operation, and achieve the effect of protecting circuit safety and improving stability
Active Publication Date: 2019-03-29
CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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Problems solved by technology
[0003] At present, although there are various protection methods for battery short-circuit protection devices, almost all of these protection methods cut off the circuit when the current reaches a preset value. If the short circuit protection device cannot be distinguished, it will be treated as a short circuit, cutting off the circuit and affecting the normal operation of the system
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[0052] In order to make the object, technical solution and technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
[0053] In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner ", "outside" and other expressions indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and do not indicate or imply the specific installation and operation orientation that the described device or component must have, so it cannot be understood as a reference to this Invention Limitations.
[0054] In the description o...
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The invention discloses a battery over-current protection circuit, which comprises that a first-level sampling and locking unit samples and locks the size of circuit current and transfers the size to a voltage division protection unit; the voltage division protection unit performs voltage division protection on the circuit when the circuit current increases; a second-level sampling and locking unit samples and locks the size of the circuit current after voltage division of the voltage division protection unit and transfers the size to a judgment control unit; and the judgment control unit performs control according to the size of the circuit current after voltage division of the voltage division protection unit, and disconnects a major loop of the circuit or relieves a voltage division protection state of the voltage division protection unit in a time delay manner. Compared with the prior art, voltage division protection is firstly performed on the circuit when the circuit current increases, then a cause is judged, and corresponding measures of disconnecting the circuit or relieving voltage division protection and the like are taken according to the cause, thereby ensuring the system not to be affected by external current pulse and the like to have a mistaken cutting operation, and significantly improving the stability of the system. In addition, the invention further discloses a battery over-current protection method.
Description
technical field [0001] The invention belongs to the technical field of lithium electronics, and more specifically, the invention relates to a battery overcurrent protection circuit and a battery overcurrent protection method. Background technique [0002] Non-renewable energy is increasingly scarce in today's society, and the environmental pollution caused by non-renewable energy is becoming more and more serious. Therefore, various new energy sources, especially technologies in the field of lithium batteries, are developing more and more rapidly. However, as lithium batteries are widely used in various industries, the changing environmental factors in different fields and the battery system becoming more and more complex to meet the needs have brought many new problems. Among them, security issues are undoubtedly the first to be resolved. Among all kinds of safety problems of lithium batteries, battery short circuit is one of the most frequent and most serious problems. ...
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IPC IPC(8): H02H7/18
CPCH02H7/18
Inventor 苏晓越刘祥赵东炎
Owner CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY