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1. A high-frequency heater is developed with pulse width modulation, which can achieve closed-loop controllable heating current with good flexibility. The battery is heated using its own power, contributing to the implementation of battery heaters for electric vehicles.
A novel pulse self-heating strategy is proposed to enable quick warming of the battery. The battery is heated up using pulse self-discharge signal generated by self-designed circuit. Pulse heating can provide faster heating with lower polarization. Internal resistance and off-period voltage are predominant influence on heating duration.
Higher SOC is suggested for pulse heating to achieve heating duration within 200 s. Battery warming at low temperature is a critical issue affecting battery thermal management. In this study, the pulse self–heating strategy is proposed to enable quick and safe warming of lithium–ion battery at low temperature.
Besides, given the relationship between the current frequency and the heat generated by the battery, a low frequency (0.01–0.1 Hz) was chosen to achieve higher heat production. Second, the pulse self-heating of the battery was carried out alternately by employing the VACV charge heating mode and the VACV discharge heating mode.
Conclusions A pulse internal self–heating strategy is proposed to achieve quick battery heating. An electric circuit is built to generate intermittently high current in the battery. Fluctuation of off–period voltage and on–period voltage are observed, and this fluctuation amplitude gradually decreases as the heating proceeded.
Aiming to the issue of charging difficulty and capacity fading for lithium-ion battery at low temperature, this study proposes a preheating strategy using variable-frequency pulse.
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Warming up lithium-ion batteries from cold environments to room temperature rapidly and safely is the key to popularizing battery electric vehicles in cold regions. Pulse preheating technology is an effective internal heating method while facing challenges such as low heating rate, high energy consumption, and risk of over-charging or discharging.
Live ChatThe first term I (V − O C V) of the equation represents the irreversible heat generated due to the electrode potential deviation from the Open-Circuit Voltage (OCV) to form the electrode polarization, and under pulse current excitation in a low-temperature environment. The battery will generate a tremendous transient high voltage in a short time due to …
Live ChatBy using a pulsed current to heat the vehicle''s power battery and a bidirectional high-frequency pulse heating algorithm, The Bidirectional Pulse EV Charger effectively solves the pain points of electric vehicle — charging difficulties in low- temperature environments and shortened mileage.
Live ChatThe results show that the optimal variable‐frequency pulse pre‐heating strategy can heat the lithium‐ion battery from −20°C to 5°C in 1000 seconds. Meanwhile, it brings less damage to the battery health and improves the performance of battery in cold weather based on the views of power consumption, capacity attenuation, and internal impedance changes.
Live ChatThe experimental results showed that the proposed battery self-heating strategy can heat a battery from about -20 to 5 °C in less than 600 s without having a large …
Live ChatThe results show that the optimal variable-frequency pulse pre-heating strategy can heat the lithium-ion battery from −20°C to 5°C in 1000 …
Live ChatBattery internal heating technology could efficiently enhance the power supply capability of Lithium-ion batteries at low temperature. However, existing interna
Live ChatThe proposed AC heating strategy can change the heating rate of the lithium-ion battery by changing the switching frequency, and the optimal heating effect is achieved at a frequency of 500 Hz (4.2C), which heats up the test battery from 253.15 to 273.15 K in 365 s, with an average heating rate of 3.29 K/min, and the temperature distribution of the battery is …
Live ChatResonant inverters are widely used in induction heating applications. Series Resonant Inverter (SRI) fed with voltage source is very much reliable, cost-effective and provides various power control techniques. Different power control schemes like phase shift control (PSC), asymmetrical duty cycle (ADC) control, asymmetrical voltage cancellation (AVC) control, pulse …
Live ChatBy using a pulsed current to heat the vehicle''s power battery and a bidirectional high-frequency pulse heating algorithm, The Bidirectional Pulse EV Charger effectively solves the pain points of electric vehicle — charging difficulties in …
Live ChatUsing high-frequency AC to charge or discharge LIB can effectively address the issue of battery aging due to voltage imbalances. The AC heating strategy provides a feasible …
Live ChatVerification of battery terminal voltage at 20 % SOC. Results at a BPC heating frequency of 100 Hz when the temperature is −10 °C (A), 0 °C (B), and 10 °C (C). Results at a BPC heating frequency of 500 Hz when the temperature is −10 °C (D), 0 °C (E), and 10 °C (F). Download: Download high-res image (2MB)
Live ChatFurther performance analysis showed that the increased heating frequency contributed to a higher ... during the first 5 s. When switches S1 and S3 were set to position a, and switches S2 and S4 were set to position b, battery pack 1 began discharging with a high current owing to the short circuit; simultaneously, battery pack 2 was charged with ...
Live ChatExperiments are performed to evaluate the performances of the battery cells and battery pack. The bidirectional pulse heating technology is set to a pulse frequency of 2 Hz, which is the highest steady-state frequency available for the physical bidirectional DC/DC module used in charger that available in the market.
Live ChatTo study the heat generation behavior of batteries under high-frequency ripple current excitation, this paper establishes a thermal model of LIBs, and different types of LIBs …
Live ChatChangan SL03 Car Uses Micro Core High Frequency Pulse Heating Technology, Find Details and Price about EV Car New Energy Car from Changan SL03 Car Uses Micro Core High Frequency Pulse Heating Technology - Tianjin Hanlian SCM Co., Ltd. ... CLTC pure electric battery life [km] 200: 200: 705: 515: Length*width*height [mm] 4820*1890*1480: 4820*1890 ...
Live ChatThe experimental circuit for pulse preheating is shown in Figure 2 nsidering the polarization of discharge, the Thevenin equivalent model of the lithium battery is used [], where OCV is the battery open-circuit voltage, R 0 is …
Live ChatIn this paper, an optimal pulse heating strategy is proposed for low-temperature heating of lithiumion battery. Firstly, this paper establishes a coupling model to describe the electro-thermal-aging behavior of battery. Secondly, the heating time and capacity loss jointly form a multi-objective optimization problem with the current constraint.
Live ChatThe results show that the optimal variable-frequency pulse pre-heating strategy can heat the lithium-ion battery from −20°C to 5°C in 1000 seconds. Meanwhile, it brings less damage to the battery health and improves the performance of battery in cold weather based on the views of power consumption, capacity attenuation, and internal impedance changes.
Live Chat4.2. Effect of AC Frequency on Battery Life. The heating effect suggests that selecting a higher AC frequency can heat the battery faster. This is crucial for studying the effects of high-frequency charging or discharging at low temperatures (253.15 K) on lithium precipitation in the battery.
Live Chatbetween the DC pulse discharge frequency and the internal heat generation rate of the battery exists. Unfortunately, there are few experiments on the correlation between DC pulse frequency and heat generation rate in the studies. The studies only concentrated on low frequencies below tens of Hz or ultrahigh frequencies of 50kHz and 150kHz. There
Live ChatTo acquire the temperature and voltage variation of the battery during self–heating, the pulse heating signal is applied to the battery. Heating is performed with the switching interval of 0.5 s. The initial ambient temperature is −10 °C, and heating is switched off when the battery reaches 10 °C. The SOC is set to 1.
Live ChatThat is why working with high-frequency chargers offers numerous benefits: maximum energy saving; longer life span of your battery; reduced heat generation in the battery; lower water consumption; low weight …
Live ChatMoreover, the pulsed heating method can easily achieve a high heating rate. Even at 0.4 s pulse period, the heating rate in the initial 1 min can achieve 10.2 °C/min. This indicates that the internal resistance of lithium ion batteries is efficiently used to generate heat via the proposed pulse waveform.
Live ChatThe results show that only high-frequency and high-amplitude AC pulse parameters could heat the battery to above 0 °C within 5 min without capacity loss. The primary contribution of this research is to uncover the battery aging …
Live Chat• A novel pulse self-heating strategy is proposed to enable quick warming of the battery. • The battery is heated up using pulse self-discharge signal generated by self …
Live ChatThe bidirectional pulse heating technology is set to a pulse frequency of 2 Hz, which is the highest steady-state frequency available for the physical bidirectional DC/DC …
Live ChatMoreover, the heating time can be reduced to within 2 min by increasing cell output power using convective heating and mutual pulse heating. For external power heating, high frequency AC signal ...
Live ChatIn Fig. 9 (b) the battery positive and negative pulse current and pulse current relative to the CC charge increased by 5.57% and 0.86% respectively; In Fig. 10 (b) the battery positive and negative pulse current and pulse current relative to the CC charge increased by 10.20% and 1.87% respectively. Obviously, the influence of positive and negative pulse …
Live ChatDOI: 10.1016/J.IJHEATMASSTRANSFER.2019.02.020 Corpus ID: 127709540; Experimental study on pulse self–heating of lithium–ion battery at low temperature @article{Qu2019ExperimentalSO, title={Experimental study on pulse self–heating of lithium–ion battery at low temperature}, author={Zhiguo Qu and Z. Y. Jiang and Qiuwan Wang}, …
Live ChatUtilizing micro-core high-frequency pulse heating technology adaptable to all temperature ranges and scenarios, Changan Auto ingeniously integrates the battery and electric drive system. This inventive solution effectively addresses the battery warming challenge in low-temperature conditions, enabling users to enjoy unrestricted driving across a wide temperature …
Live Chatfor fast and non-destructive internal heating applications without complex battery models. The remainder of this paper is organized as follows. Sec-tion 2 describes a heat generation analysis of pulse heating. Then an experimental setup and battery pulse self-heating tests are explored in Sect. 3. An online VACV pulse heating
Live ChatTo address the issues mentioned above, many scholars have carried out corresponding research on promoting the rapid heating strategies of LIB [10], [11], [12].Generally speaking, low-temperature heating strategies are commonly divided into external, internal, and hybrid heating methods, considering the constant increase of the energy density of power …
Live ChatReceived 26 October 2022; Revised 23 November 2022; Accepted 7 December 2022; Published 4 February 2023
Live ChatIn our previous study, we developed flexible phase-change material (PCM) packages for passive thermal energy storage of heat from lithium-ion batteries in hybrid …
Live ChatHigh-frequency ripple current excitation reduces the lithium precipitation risk of batteries during self-heating at low temperatures. To study the heat generation behavior of batteries under high-frequency ripple current excitation, this paper establishes a thermal model of LIBs, and different types of LIBs with low-temperature self-heating schemes are studied based …
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