BMS-based electric vehicle fast charging and heating control system and method
A heating control, electric vehicle technology, applied in electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc., can solve problems such as small heating current, interrupted charging, and inability to heat normally, to avoid shock and achieve good compatibility sexual effect
Active Publication Date: 2021-04-16
HUBEI JINQUAN NEW MATERIALS CO LTD
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Problems solved by technology
[0003] At this stage, the fast charging pile only has the battery charging mode, and is not specially used for the battery heating mode. When the battery pack is disconnected and only heated, the charging pile will It is judged that the battery has been disconnected, which leads to the interruption of charging; furthermore, the voltage value of the default battery of the charging pile cannot fluctuate violently during the charging process, because the heating current is usually small, and the current output accuracy of the charging pile is low. When the constant current mode is used for separate heating, the charging pile can easily determine that the battery voltage is faulty, resulting in failure to heat normally
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[0040] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0041] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...
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The invention relates to the technical field of power batteries, and discloses an BMS-based electric vehicle fast charging and heating control system and method. In the process of heating a power battery, by requesting switching of charging modes of a charging pile, a large-amplitude fluctuation of a voltage can be prevented, and therefore the charging pile can be prevented from judging a battery voltage fault so that a heating process is normally carried out; furthermore, in the process of switching the modes of the charging pile, the voltage is prevented from being impacted in a mode of generating a voltage superposition value to slowly rise or fall; and then, according to the invention, the electric vehicle can normally heat and charge the battery for different types of charging piles, and compatibility is good.
Description
technical field [0001] The invention relates to the technical field of power batteries, in particular to a BMS-based fast charging and heating control system and method for electric vehicles. Background technique [0002] The function of the charging pile is similar to the refueling machine in the gas station. It can be fixed on the ground or wall, and installed in the parking lot or charging station of public buildings and residential areas. It can charge various types of electric vehicles according to different voltage levels. When the temperature is lower than 0°C in winter, since the power battery is charged below 0°C, there is a risk of lithium deposition and fire. Therefore, when the electric vehicle is charged at low temperature, the battery management system BMS will first control the battery to heat up. to charge. [0003] At this stage, the fast charging charging pile only has the battery charging mode, and is not specially used for battery heating. When the batte...
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IPC IPC(8): B60L53/62B60L58/12B60L58/27
CPCY02T10/70Y02T10/7072Y02T90/12
Inventor 罗达逸
Owner HUBEI JINQUAN NEW MATERIALS CO LTD