Low-temperature alternating-current heating method and device for lithium ion battery for launching vehicle
A lithium-ion battery and heating method technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of long time consumption, large energy loss, poor heating uniformity, etc., and achieve the effect of increasing the heating speed
Pending Publication Date: 2022-02-25
BEIJING INST OF SPECIALIZED MACHINERY
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Problems solved by technology
The external heating method has the advantages of being simple and easy to implement, but it also has disadvantages such as long time-consuming, large energy loss, and poor heating uniformity.
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[0054] In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0055] figure 1 It is a flow chart of a low-temperature alternating current heating method for a lithium-ion battery for a launch vehicle according to an embodiment of the present invention, including the following steps:
[0056]Step 101, obtaining the battery temperature T and the remaining battery capacity SOC in real time;
[0057] Step 102, obtaining A and f corresponding to the T and SOC from the database,...
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The invention provides a low-temperature alternating-current heating method and device for a lithium ion battery for a launching vehicle. The method comprises the following steps: acquiring a battery temperature T and a battery residual capacity SOC in real time; acquiring A and f corresponding to the T and the SOC from a database, the A and the f respectively being the amplitude and the frequency of the current output by an alternating current power supply which enables the heat generation rate of the battery to be the highest and is used for heating the battery; adjusting an alternating current power supply to enable the amplitude and the frequency of the output current to be respectively equal to A and f; and repeating the process until the battery temperature T reaches the set heating temperature. The heating speed of the battery can be improved on the premise that the capacity and the service life of the battery are not damaged. Experiments show that heating from -20.03 DEG C to 0 DEG C within 480s can be realized by adopting the method disclosed by the invention, the average temperature rise rate is 2.50 DEG C / min, and the temperature can be raised to 5 DEG C within 613s.
Description
technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a low-temperature AC heating method and device for a lithium-ion battery used in a launching vehicle. Background technique [0002] With the development and application of a new generation of all-electric drive missile launch vehicles, lithium-ion power batteries have become electric drive batteries due to their advantages such as high specific power, voltage, and energy density, long cycle life, no pollution, no memory effect, and low self-discharge. An important energy storage component of a missile launch vehicle. However, the electrochemical reaction rate of lithium-ion batteries decreases at low temperatures, it is difficult to intercalate and deintercalate lithium ions, the internal resistance increases sharply, the charge and discharge performance deteriorates, the capacity decays significantly, and the power performance deteriorates, which leads to the failu...
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IPC IPC(8): H01M10/615H01M10/625H01M10/633
CPCH01M10/615H01M10/633H01M10/625Y02E60/10
Inventor 孙丹妮周妍吕国栋
Owner BEIJING INST OF SPECIALIZED MACHINERY