How to improve the energy density of the lithium-ion battery system

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

How to improve the energy density of the lithium-ion battery system? Improve the energy density of the lithium-ion battery system is a system engineering, which can start from the development and design of new materials, the improvement of the rechargeable battery structure and the improvement of production and manufacturing process. 1. Upgrade the electrical core material uses a different chemical system, which can change the energy density.

For example, based on the ratio of nickel, cobalt and manganese in the positive material of the key battery, cobalt, manganese is increased. The silicon / carbon polymer material on the negative electrode material reaches 4200 mAh / g, while the negative electrode material base in lithium electrode is only 371 mAh / g, which is much lower than the silicon / carbon polymer material. In addition, many lithium-ion batteries have a capacity loss during the first charging process, and some lithium ion losses may also be added during the circulation process.

Therefore, the technique of supplementing lithium elements in the electrode or electrolyte is also a major research direction of battery technology. 2. The most common lithium-ion battery pack on the sales market is a small module + battery pack, and the structure of the support is structural composition.

Many parts have a lot of volume and quality, which greatly reduces overall integrated high efficiency. Adjusting the packaging structure and simplifying the installation support point structure enables key components more compact, in a limited indoor space, lithium-ion battery packs, tall. This year, the CTP (Lithium Ion Battery Package) scheduled method for battery brands changed the original key component - lithium-ion battery pack structure, lithium-ion battery pack consists of a number of large-capacity lithium-ion batteries, lithium ion battery packs piled up A lot of parts.

Compared with the traditional lithium-ion battery pack, the plan will not only reduce the total number of parts, but reduce indoor space and more energy usage. Thus, the construction of a lithium-ion battery pack has a second-level integrated plan for a lithium ion battery pack, which has become a technical orientation that many companies tend to choose. 3.

Changing the lithium-ion battery pack specification change the specifications of lithium-ion battery packs, but also the key position to expand. For example, based on changing the lithium-ion battery pack length and total width, make the key and more smooth and small, benefit the space layout of lithium-ion battery packs, improve the indoor space efficiency of lithium ion battery packs, and increase lithium ion battery packs Compared to energy. The advertising design can also make the key to the total heat-insulating area, so that the key can immediately pass the internal heat to the outside world, the accumulation of heat inside the alert, and the increase is higher than the energy as soon as possible.

4, use a lightweight material in materials, except for the upgrade of the lithium-ion battery material, the improvement of the rechargeable battery assembly products is also a key way to improve the rechargeable battery system software than energy. Use a lightweight material has become a key way. At this stage, battery box materials typically use aluminum alloy materials, high strength steel sheet materials and polymer materials.

The aluminum alloy is small, only about one-third of stainless steel sheets, using aluminum alloy profiles to reduce stainless steel sheets to reduce the net weight of lithium-ion battery packs, and the surface of the aluminum alloy profile will have a high-density and stable air oxide film. Corrosion, high quality battery box material. High-strength steel material is high, the high toughness charging battery housing can be lighter, low cost, good plasticity, is a more ideal battery pack material, currently in battery packs.

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