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Battery capacity

In order to increase battery capacity, materials are needed in which the electro-chemically active ions undergo redox changes of more than one electron (e.g., Ni2+-Ni" +, in a narrow voltage window, maintaining capacity at high... [Pg.329]

Renault-Nissan is heavily committed to electric vehicles as well. The company plans to launch an electric car in the U.S. market in 2010. The car will be designed to have a range of 100 miles and performance comparable to that of a V-6 gasoline-powered car. A quick plug in of about one hour will deliver a recharge of about 80% of the batteries capacity. [Pg.55]

At lower temperature, ionic conductivity is lowered, ohmic polarization is increased, and the battery capacity decrease is observed mainly due to diffusion limitations. [Pg.8]

To get high power density (i.e., battery capacity at a high current rate), there have been many attempts using carbon beads, hybrid materials with CNTs and diverse oxide materials. Wang et al. [96] have... [Pg.487]

Actual capacity (of batteries) -> capacity Adams, Ralph Norman... [Pg.12]

As mentioned before, the theoretical capacity of the battery is the maximum battery capacity and depends only on... [Pg.400]

A study of the influence of ultrasound on the charging of lead-acid batteries [ 128] showed that there is a great improvement in the performance of these batteries caused by enhancement of ion transport. An increase of 10-22% in battery capacity is obtained in the presence of ultrasound, and even after deducting an estimated increase in capacity due to temperature changes caused by ultrasound, there is still an 8-14% increase in capacity for the battery. The results of the studies led to the conclusion that the improvement in performance. of lead-acid batteries under the action of ultrasound can be attributed to the enhanced energy transfer and accelerated mass transport. [Pg.244]

Unlike the cathode reaction, the anode reaction is not a homogenous single-phase reaction, but rather a two-phase [Cd and Cd(OH)2] charge transfer reaction. Therefore, the anode potential is independent of its SOC. The anode reaction mechanism plays a significant role in impacting the reduction in battery capacity... [Pg.1898]

The battery capacity represents the electric charge that a battery can supply. Instead of using the Coulomb, which is the SI unit for the electric capacity but is an inconveniently small unit, the Amphour (Ah) is commonly used to refer to the capacity of electric vehicle batteries. Batteries are characterized by a nominal value of capacity, determined with predefined procedures. However, the real capacity of a battery depends on the current values drawn out from it. This changing in the expected capacity is caused by uncompleted or unwanted reactions inside the cell. This effect occurs in all the types of batteries, but it is particularly accentuated for lead-acid batteries. Figure 5.13 shows typical discharge curves for different discharge rates (/j, where the black line shows the available... [Pg.143]

The capacity of batteries used to supply electric vehicles is generally referred to a 5 h discharge, and in that case, the capacity is represented with the symbol C5. Moreover, the value of battery capacity is often used to represent a current value. [Pg.143]

FM4. Incomplete charging. If either of the electrodes is persistently undercharged, either because of a defective charge regime or as a result of physical changes which prevent the electrode from reaching an adequate potential, then a rapid decline in available battery capacity may occur. [Pg.5]

Fig. 3.33. (a), (b) Phase composition of pastes prepared with different amounts of acid at 30 and 80°C (c), (d) Changes in C20 capacity of 12-V/42-Ah automotive batteries with positive plates produced from 3BS, 4BS, and IBS pastes (depending on acid strength and preparation temperature) on cycling at 50% DoD. The battery capacity is limited by the positive plates [34]. [Pg.77]

Tests were also performed using VRLA batteries with gelled electrolyte [9]. The additives gave benefits similar to those obtained with AGM batteries. It was concluded that the porosity additives could have a positive effect on battery capacity. Future work with these additives will continue and involve full-scale batteries. [Pg.114]

One issue is how to define the capacity of a fully charged battery. It can be the rated capacity (given by the manufacturer), the measured capacity (which changes with age), or the practical capacity (battery capacity that is available during operation conditions). The differences between these capacities is illustrated in Fig. 8.7. Definitions of SoC, SoH, measured capacity, practical capacity etc. are given in Table 8.1. A detailed discussion of these terms has been presented by Sauer et al. [4]. [Pg.213]

A simple Ah counter with recalibration is shown in Fig. 8.12. The Ah counter is reset to the battery capacity when the full SoC is detected, and it is set to zero when a fully discharged state is detected. Additionally, the Ah counter can be used to measure battery capacity. [Pg.222]

From the literature, it is known that temperature affects the performance of a battery in multiple ways. With decreasing temperature, battery capacity is reduced and cycle-life is increased. Charge-acceptance is reduced at decreasing temperature, especially if the temperature is below 0°C [30]. Temperature gradients between cells in a battery reduce capacity and lifetime [31]. Peak power increases with increasing temperature [32]. Therefore, control of battery temperature (thermal management) is an important task for a battery management system. [Pg.233]

Na2S2-Br2) redox flow systems, the active mass is in the electrolyte(s), which is stored externally and is pumped to the electrodes. In this case, the battery capacity (energy) can be changed independently of battery power by altering the size of the external storage tanks. [Pg.301]


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See also in sourсe #XX -- [ Pg.345 ]




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Automotive batteries capacity

Batteries Ampere-hour capacity

Batteries high-capacity

Batteries practical capacity

Batteries specific capacity

Batteries theoretical capacity

Battery Capacity and Discharging

Battery capacity, definition

Battery performance charge capacities

Battery technology capacity

Capacity factors affecting battery

Capacity lithium batteries

Capacity lithium polymer batteries

Capacity nickel metal hydride batteries

Capacity of a battery

Capacity of battery

Capacity traction batteries

Cathode materials lithium batteries, gravimetric capacities

Discharge capacity batteries

Large-capacity lithium ion batteries

Traction lead-acid batteries capacity

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