Electric automobile lithium battery balanced maintenance system based on current distribution

Abstract

The invention discloses an electric automobile lithium battery balanced maintenance system based on current distribution. The electric automobile lithium battery balanced maintenance system structurally comprises a battery main body, a bottom frame, a side cover, a handle, wherein the battery main body and the side cover are connected with the bottom frame in a cementing mode, the battery main body is connected with the side cover in a buckling mode, the battery main body is connected with the handle in a riveting mode, and a battery balancing device is installed inside the battery main body.According to the electric automobile lithium battery balanced maintenance system, a user can reasonably charge the automobile according to the using condition of the automobile; during slow charging,a shunting connecting plate is electrically connected with a shunting electric connecting arm; during fast charging, a constant-current arm is electrically connected with a constant-current battery block; during time-delay charging, an electricity measuring electric connecting arm is electrically connected with an electricity measuring battery block, and then the electricity is uniformly conveyedto the automobile through a power supply battery block; through reasonable charging time, it is guaranteed that a user can use the automobile at any time, the situation that the charging time is not insufficient or different degrees of damage to the automobile and the battery is caused due to the fact that a long-term single use rapid charging mode is used is avoided, and the balance maintenance is carried out when the lithium battery is charged to the maximum.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a balanced maintenance system for electric vehicle lithium batteries based on current distribution. Background technique [0002] Electric vehicle batteries are divided into two categories, storage batteries and fuel cells. Storage batteries are suitable for pure electric vehicles; equalization charging, referred to as equalization charging, is charging to balance battery characteristics. Differences and other reasons cause the battery terminal voltage to be unbalanced. In order to avoid the deterioration of this unbalanced trend, it is necessary to increase the charging voltage of the battery pack and activate the battery to charge the battery to balance the characteristics of each battery in the battery pack and prolong the maintenance method of the battery life. . [0003] In the prior art, a shunt adapter is attached to the battery to achieve the function of shunting. In thi...

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Problems solved by technology

[0004] The main purpose of the present invention is to overcome the deficiencies of the prior art and provide a balanced maintenance system for electric vehicle lithium batteries based on current distribution to solve the problem of adding a shunt adapter to the battery to achieve the function of shunting. In this mode , when a battery is fully charged first, the balancing device can prevent it from overcharging and continue to charge the battery that is not fully charged. This method is simple, but it will cause energy loss and is not suitable for fast charging systems; Each cell is discharged to the same level through the same load one by one and then charged with a constant current to ensure a more accurate equilibrium state between the cells. However, due to the physical differences between the cells, it is difficult to achieve the ideal effect after discharge. , even if the same effect is achieved after discharge, a new unbalanced phenomenon will appear during the charging process; timing, sequencing, and separate detection and uniform charging of the single batteries in the battery pack, when charging the battery pack, can To ensure that each battery in the battery pack will not be overcharged or over-discharged, thus ensuring that each single battery in the battery pack is in a normal working state; that is to say, although the shunt charging speed is slow but It can save current. Discharge charging is faster than shunt charging, but it is difficult to achieve balanced charging. Although the detection method achieves balanced charging, the charging time is particularly slow.

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