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Electric vehicle storage battery dump energy algorithm based on digital voltage sampling

A technology of remaining power and digital voltage, applied in the field of electric vehicles, can solve problems such as off-grid, inconvenient riding for users, and low value

Active Publication Date: 2014-01-01
ZHEJIANG JINKAI ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case of high current output such as uphill or starting, the electron consumption on the positive and negative electrodes is greater than the number of electrons generated by the reaction between the electrodes and the electrolyte, so that the voltage value will drop sharply in a short period of time, resulting in The power display of the meter does not correspond to the grid, or the value is pulled down, so that the power value indicated by the meter is significantly lower than the actual power of the battery, and even the charging indication appears in advance
Users who understand the principle of battery discharge can understand the reason for this state, while users who do not understand the principle of battery discharge will complain and worry about whether the vehicle needs to be charged or not, which brings inconvenience to the user's riding

Method used

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Embodiment Construction

[0018] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0019] The algorithm of remaining power of electric vehicle battery based on digital voltage sampling includes the following steps:

[0020] a. Sampling to obtain the initial voltage V after power-on 0 ’; After the key is powered on, directly collect the initial voltage V 0 '.

[0021] b1. Within 15 seconds after startup, the voltage data V is collected every 5 seconds. 1 ', V 2 ', V 3 '.

[0022] b2, V △n '=V 0 '-V n ’, if V △1 ', V △2 '...V △n ’ are greater than M, then V 0 =V n '; if V △n '=V 0 '-V n ′0 =V n '. Sequential detection of V △1 ', V △2 ', V △3 ′, if V △1 ’ is greater than 3V, then detect V △2 ’, if V △2 ’ is also greater than 3V, then detect V △3 ′, in short when V △1 ', V △2 ', V ...

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Abstract

The invention provides an electric vehicle storage battery dump energy algorithm based on digital voltage sampling, belonging to the technical field of electric vehicles and solving the problem of inaccurate display of electric quantity of the traditional electric vehicle instrument. The electric vehicle storage battery dump energy algorithm based on the digital voltage sampling comprises the following steps of: a, sampling to obtain an initial voltage V0'; b, carrying out empty voltage processing to obtain V0; c, carrying out once voltage sampling every Ns, sequentially obtaining V1, V2, V3,......,Vn; d, judging whether the Vn is greatly reduced relative to the V0, if the Vdeltan is more than k, entering the step e, wherein Vdeltan=V0-Vn, if Vdelta is more than 0 and is less than k, entering the step f, if Vdelta is less than 0, entering the step g; e, V0=V0, returning the step d; f, V0=Vn, returning the step d; and g, increasing the voltage, V0=Vn, and returning the step d. The electric vehicle storage battery dump energy algorithm ensures that the electric quantity displayed by an electricity meter is maximally close to the actual electric quantity of a battery.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to an algorithm, in particular to an algorithm for remaining power of an electric vehicle storage battery based on digital voltage sampling. Background technique [0002] The power display of the electric vehicle generally all directly takes the voltage signal from the battery to indicate the remaining power of the battery. At present, electric vehicle meters generally have three-segment (multi-segment) type, digital type, and pointer type. They basically indicate the remaining battery power by collecting battery voltage in real time. According to chemical knowledge, we know that charging is to convert electrical energy into chemical energy and store it. Discharging is the process in which electrical energy is released from the battery to drive external devices, and chemical energy is converted into electrical energy. Since it is a chemical reaction, there must be a proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 方火军范韩伟陈铮鲍旭云鲍婕
Owner ZHEJIANG JINKAI ELECTRONICS TECH CO LTD