Lithium battery pack charging management system
A lithium battery pack and charging management technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as temperature runaway of the shunt circuit, many connection signal lines, affecting the timely control of the shunt circuit, etc., to achieve the effect of complete charging
Inactive Publication Date: 2015-08-19
SINONEWENERGY SUZHOU TECH
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Problems solved by technology
Since the temperature acquisition unit and the dispatching unit are electrically connected through signal lines, there are many signal lines connected to the single lithium battery balance control device, and the feedback control often has a time lag problem, which affects the timely control of the shunt circuit, making the shunt circuit There is still a risk of temperature runaway
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[0018] In order to describe the technical content, structural features, achieved goals and effects of the invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0019] Such as figure 1 The charging management system of the lithium battery pack shown, in this example, the lithium battery pack is composed of a plurality of single lithium batteries 1 connected in series, and the charging management system includes a main switch 2, a control management module 3, and a plurality of voltage acquisition modules 4 , a plurality of discharge modules 5 .
[0020] The main switch 2 is used to control whether the external power supply is electrically connected to the lithium battery pack, that is, whether the lithium battery pack can continuously charge each single lithium battery 1 through the charger 6 electrically connected to the external power supply.
[0021] The control management module 3 is connected with t...
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The invention relates to a lithium battery pack charging management system. The system comprises a control management module which is used for controlling whether an external power supply can transmit electric energy to a lithium battery pack, a plurality of voltage acquisition modules of which each is used for detecting the real-time voltage across the two ends of a corresponding single lithium battery, and a plurality of discharging modules of which each is used for discharging the corresponding single lithium battery. Each discharging module includes a discharging circuit, and a voltage switch, an electric energy conversion element and a temperature switch are connected in series in the discharging circuit, wherein the voltage switch is a switch which is switched on when the real-time voltage across the two ends of the corresponding single lithium battery reaches a set value, and the temperature switch is a switch which is switched off when the real-time temperature of the corresponding electric energy conversion element or a component in thermal conductive connection with the electric energy conversion element reaches a set overheating temperature protection threshold. As one temperature switch for overheating protection is connected in series to each discharging circuit, the problem that overheating protection of the discharging circuits is not in time is avoided.
Description
technical field [0001] The invention relates to a charge management system of a lithium battery pack. Background technique [0002] Existing lithium battery packs usually consist of a plurality of single lithium batteries connected in series. It is difficult to ensure that the specifications of these single batteries are exactly the same. When charging, it is easy to have inconsistent real-time voltages at both ends of each single battery. When charging, in order to make the entire battery pack reach the rated voltage, each single battery needs to reach the rated voltage. In this way, when a single battery has a low capacity, its voltage is also lower than that of other single batteries. At this time, in order to reach the rated voltage of the battery pack, other single batteries may be overcharged, which may easily lead to lithium battery charging. The battery exploded. [0003] In order to avoid the above situation, in the prior art, a discharge circuit for discharging t...
Claims
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IPC IPC(8): H02J7/00H02H7/18
CPCH02H7/18H02J7/00
Inventor 范田郴樊朝辉瞿洪桂
Owner SINONEWENERGY SUZHOU TECH