Battery heating system, electric vehicle and vehicle-mounted system
A battery heating system and battery technology, applied in the field of electronics, can solve the problems of low energy utilization, high cost, large space, etc.
Active Publication Date: 2020-04-17
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology
[0003] In the prior art, external heating methods such as wide-wire metal film heating and electric heating wire heating are usually used to control the temperature of the heater to raise the temperature, and then the battery is heated by contact conduction, air convection, and liquid heat transfer, which requires a large space and higher cost
In addition, external heating is easy to form a temperature gradient in the battery pack, and most of the energy is dissipated, and the energy utilization rate is low
Method used
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[0087] The technical solution in this application will be described below with reference to the accompanying drawings.
[0088] For ease of understanding, several terms or concepts involved in the embodiments of the present application are firstly introduced next.
[0089] Lithium-ion battery (lithium-ion cell): refers to a device that relies on the movement of lithium ions between the positive electrode and the negative electrode to realize the mutual conversion of chemical energy and electrical energy. The device includes electrodes, separator, electrolyte, housing and terminals, etc., and is designed to be rechargeable. In the embodiment of the present application, the lithium electronic battery may also be referred to as a battery cell, a single battery, a single storage battery, and the like.
[0090] Lithium-ion cell module (lithium-ion cell module): refers to the combination of more than one single battery in series, parallel or series-parallel and used as a power supp...
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The invention provides a battery heating system, an electric vehicle and a vehicle-mounted system, which can be applied to the field of electric vehicles. According to the scheme provided by the invention, the battery can be rapidly and uniformly heated. The battery heating system comprises a temperature monitoring unit used for outputting a temperature monitoring signal, a voltage conversion unitused for receiving a first voltage input by a power supply or a second voltage input by a to-be-heated battery, a control unit used for receiving the temperature monitoring signal and outputting a control signal, a voltage conversion unit used for boosting or reducing the first voltage or boosting or reducing the second voltage according to control signal such that the to-be-heated battery receives the charging current of the power supply through the voltage conversion unit in a first time period and outputs the discharging current to the power supply through the voltage conversion unit in asecond time period, and the to-be-heated battery heats itself through alternate charging and discharging.
Description
technical field [0001] The present application relates to the field of electronic technology, in particular to battery heating systems, electric vehicles and vehicle-mounted systems. Background technique [0002] A typical battery pack is formed by connecting multiple cells in a series or parallel configuration, and many types of battery packs include rechargeable cells. The single batteries that make up the rechargeable battery pack need to work in a suitable temperature range. Too high or too low battery temperature is not conducive to the performance of the battery, and it is easy to cause safety risks. At lower temperatures, the available capacity of the battery is greatly attenuated, resulting in the battery being unable to discharge or charge the battery under low temperature conditions, and the battery rate performance is severely attenuated, which limits the performance of the battery. In addition, under low-temperature charging conditions, due to the low battery ac...
Claims
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IPC IPC(8): H01M10/42H01M10/48H01M10/615H01M10/625
CPCH01M10/615H01M10/625H01M10/486H01M10/425H01M10/4285Y02E60/10H02J7/007194H02J7/00711H02J2310/48H01M10/44H01M2010/4271H01M10/6571H01M10/63H01M10/637H01M10/48H01M2220/20H01M10/657H01M10/633H01M10/443
Inventor 谢杰张光辉刘伟
Owner HUAWEI DIGITAL POWER TECH CO LTD