Current measurement method, device and system
A current measurement and displacement technology, applied in the field of measurement, can solve problems such as uneven current density of the collector plate, potential safety hazards, abnormal heating of the collector plate, etc.
Active Publication Date: 2021-04-06
HUATING HEFEI POWER TECH
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Problems solved by technology
The difference in the current flowing through individual batteries will cause uneven current density on the current collector plate of the battery module, resulting in abnormal heating of the current collector plate. Long-term use of batteries with current differences will have potential safety hazards and will also reduce the battery life of the battery module. service life
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.
[0045] It should ...
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The application provides a current measurement method, device and system, the system includes a cantilever beam, a photoelectric displacement detector, a laser and computer equipment electrically connected to the photoelectric displacement detector, and the laser light emitted by the laser is reflected by the free end of the cantilever beam , forming a light spot on the photoelectric displacement detector. Under the action of the magnetic field generated by the current to be measured under the free end, the magnetic block drives the cantilever beam to deflect toward the battery, and the photoelectric displacement detector detects the displacement of the light spot formed on the photoelectric displacement detector by the cantilever beam before and after deflection. The computer equipment calculates the size of the current to be measured according to the displacement of the light spot. The detection accuracy of the photoelectric displacement detector to the cantilever beam can reach the nanometer level. Therefore, the above-mentioned system can detect the small battery difference in the battery, avoid the abnormal heating caused by the uneven current density on the current collector plate, and thus improve the battery module. service life.
Description
technical field [0001] The present application relates to the measurement field, in particular, to a current measurement method, device and system. Background technique [0002] During the use of lithium batteries, due to differences in their own manufacturing processes, when the batteries are connected in parallel in the module or connected to the same load, there are slight differences in the current flow of different individual batteries. Differences in the current flowing through individual batteries will cause uneven current density on the current collector plate of the battery module, resulting in abnormal heating of the current collector plate. Long-term use of batteries with current differences will have potential safety hazards and will also reduce the life of the battery module. service life. Contents of the invention [0003] In order to solve the above problems, embodiments of the present application provide a current measurement method, device, and system. ...
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Login to View More IPC IPC(8): G01R31/389G01R19/00
CPCG01R19/0092G01R31/389
Inventor 张广平劳力周鹏
Owner HUATING HEFEI POWER TECH