Battery current estimation method
A battery current and current technology, which is applied in battery/fuel cell control devices, electric vehicles, vehicle energy storage, etc., can solve the problem that the current estimation method cannot meet the accurate current estimation of the battery system.
Pending Publication Date: 2020-10-20
的卢技术有限公司
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[0003] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology and provide a battery current estimation method. According to the characteristics of the new energy vehicle battery application scene, a system solution for collecting battery input and output energy integrated in multiple ways is formed. The system can Effectively improve the estimation accuracy of the output energy of the battery under small load, thereby ensuring the accurate estimation of the battery usage and the accuracy of the remaining power estimation, and solving the problem that the existing current estimation method cannot meet the accurate estimation of the current when the battery system is connected to different loads question
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[0012] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0013] like figure 1 As shown, the battery system 101 supplies power to the first load 105, the second load 104, the third load 108 and 111, and the first load 105, the second load 104, the third load 108 and 111 are three types of loads with large current differences. . The current of the first load 105 is the largest and the acquisition accuracy of the minimum current can be guaranteed by the main current collector 102 . The current of the second resistive load is small, and the minimum current sampling accuracy of the second load 104 cannot be satisfied by the main current collector 102 but can be guaranteed by the second load input current collector 103 . The third load 108 and 111 have the smallest current and the minimum current is so small that it cannot be directly collected by the current collector at its input, the third load input current collector 10...
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The invention discloses a battery current estimation method, and belongs to the technical field of calculation, reckoning or counting. The method comprises the steps of when a current acquisition module connected to a main positive busbar of a battery system meets the access load minimum current acquisition precision, counting acquisition data of the current acquisition module on the main positivebusbar of the battery system; when the current acquisition module connected to the main positive busbar of the battery system cannot meet the access load minimum current acquisition precision but a load input end current acquisition module meets the access load minimum current acquisition precision, counting the acquisition data of the load input end current acquisition module; when the load input end current acquisition module can only satisfy the maximum current acquisition precision but does not satisfy the minimum current acquisition precision, acquiring acquisition data of the load output end current acquisition module, and reversely deducing acquisition data of the load input end current acquisition module according to the efficiency of the same power transmission point, so that theproblem of statistics of in-vehicle energy use in the vehicle standing time period can be effectively solved.
Description
technical field [0001] The invention discloses a battery current estimation method, which belongs to the technical field of calculation, calculation or counting. Background technique [0002] Different from the energy supply method of traditional vehicles, the energy source of new energy vehicles is the battery system. During the entire life cycle of a new energy vehicle, the battery system is equivalent to the engine and fuel tank of a fuel vehicle. The process of replenishing energy, braking and driving will cause a certain degree of life damage to its energy storage unit and battery, and due to its Compared with fuel, the energy density is lower. Whether the energy collection and management of the whole vehicle is done well will determine the remaining mileage of the vehicle and the estimation of battery power. According to the characteristics of the current sensor, its detection accuracy under low load conditions is very poor, or even impossible to detect, which leads t...
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IPC IPC(8): B60L58/12
CPCB60L58/12B60L2240/549Y02T10/70
Inventor 陈朋
Owner 的卢技术有限公司