Low temperature is one of the major drawbacks of electric cars in high latitudes. This problem can be addressed using a battery self-preheating system. The existing self-heating systems have problems, s
The strategy contains two stages: preheating process for battery cold-start, and temperature holding process for battery temperature control after preheating. The strategy switches from
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May 1, 2023 · This energy conversion model can help the system to make the optimal preheating strategy and obtain the maximum discharge energy. Nevertheless, based on the outcome of
Sep 5, 2023 · Power battery packs have relatively high requirements with regard to the uniformity of temperature distribution during the preheating process.
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May 2, 2024 · Lithium-ion batteries are expected to operate within a narrow temperature window around room temperature for optimal performance and lifetime. Therefore, in cold
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This study provides a new approach for coupling the preheating technology and the power battery pack balancing technology in low-temperature environments.
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Power battery packs have relatively high requirements with regard to the uniformity of temperature distribution during the preheating process.
A preheating system with closed-loop liquid preheating coupled with heating-film preheating was designed, and the preheating effect of closed-loop preheating was investigated. The results
Lithium-ion batteries are expected to operate within a narrow temperature window around room temperature for optimal performance and lifetime. Therefore, in cold environments, electric
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Aug 30, 2023 · This study provides a new approach for coupling the preheating technology and the power battery pack balancing technology in low-temperature environments.
Jan 15, 2022 · The strategy contains two stages: preheating process for battery cold-start, and temperature holding process for battery temperature control after preheating. The strategy
Why Thermal Management Could Make or Break Renewable Energy Adoption As global renewable capacity surges past 4,500 GW, a critical question emerges: How can we prevent
The system can preheat the battery safely in the capacity range of 20%–100%. When the battery pack is set in −20 °C, the effective electric energy can be increased by 550% after preheating. An energy conversion model is also built to measure the relationship between the energy improvement of battery and the energy consumption by preheating.
Owing to small energy consumption and preheat current during preheating, this self-preheating system could still preheat the battery pack from −10 °C to 20 °C even at 0.2 SOC. As shown in Fig. 5 (c), the battery pack was preheated from −10 °C to 20 °C in 180 s, with an increase of the voltage of the battery pack from 14.7 V to 19 V.
An energy conversion model of the self-preheating system was developed. Energy conversion relationship of the battery at low temperatures was explained. Low temperature is one of the major drawbacks of electric cars in high latitudes. This problem can be addressed using a battery self-preheating system.
The strategy contains two stages: preheating process for battery cold-start, and temperature holding process for battery temperature control after preheating. The strategy switches from the preheating to the temperature holding according to the power capability of battery pack.
The model explains the energy transformation of a battery during its operation and explains the decrease of battery discharge energy from the perspective of energy conservation and energy conversion. It can be used to design a more rational and energy-efficient battery self-heating system to obtain the best preheating strategy.
In self-heating systems, a larger preheating current may result in overdischarge of the battery pack and damage the battery. Since this system can achieve a high heating rate using a relatively small current, it hardly damages the batteries. 3.2. Influence of the preheating system on battery performance 3.2.1.
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