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Preparation method of lithium-ion low-voltage power supply for commercial vehicle

A low-voltage power supply, lithium-ion battery technology, applied in the manufacture of electrolyte batteries, batteries, circuits, etc., can solve problems such as falling off, unable to start the vehicle normally, power supply cracking, etc., to prevent cracking or falling off, low internal resistance, and avoid battery effect of lifespan

Inactive Publication Date: 2020-03-17
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned deficiencies in the background technology, to provide a preparation method of a lithium-ion low-voltage power supply for commercial vehicles, and to solve the problem of internal cracking or falling off of the power supply caused by the failure to start the vehicle normally at a lower ambient temperature and the vibration of the vehicle question

Method used

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  • Preparation method of lithium-ion low-voltage power supply for commercial vehicle
  • Preparation method of lithium-ion low-voltage power supply for commercial vehicle
  • Preparation method of lithium-ion low-voltage power supply for commercial vehicle

Examples

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preparation example Construction

[0031] Such as figure 1 As shown, the present invention provides a method for preparing a lithium-ion low-voltage power supply for commercial vehicles, including the following steps:

[0032] Step 1: First select 3C~15C power type lithium ion battery cells, stick the heating film 7 on the surface of the lithium ion battery cells, and the positive and negative electrodes of the heating film are on the same side of the lithium ion battery cells, which is convenient for electricity Connect; then select the metal connector of the shape required by the design, connect 2 or more lithium-ion battery cells in parallel to form a lithium-ion battery module that meets the capacity requirements; then pass 7-10 lithium-ion battery modules The metal connectors are connected in series, and the connecting wires are connected to the positive and negative electrodes of the battery in the order of "+ / - / + / -... / + / - / + / -" to form a lithium-ion battery module 3 and then fix it inside the box 1. .

[0033...

Embodiment 1

[0039] Stick the heating film on the surface of the lithium titanate battery cell, and use 4 2.4V lithium ion battery cells in parallel to form a 0.36KWh lithium ion battery module, and then use the 10 lithium ion battery modules in a straight row type The metal connectors are connected in series to form a lithium ion battery module 2, and the lithium ion battery module 2 is fixed in the box; the switch is connected in series between the heating membrane and the power generation module. Pour the prepared electronic potting glue into the box by potting method until the liquid level of the electronic potting glue is 8mm higher than the highest surface of the lithium-ion battery module, and the thickness of the surface casting is controlled at 5mm~8mm at the metal connector. The thickness is controlled between 35mm and 40mm to ensure that the lithium-ion battery module and the outer box are integrated without affecting the heat dissipation of the battery. Then put the poured box i...

Embodiment 2

[0041] Three 3.2V lithium iron phosphate battery cells are connected in parallel to form a 0.45KWh lithium ion battery module, and then 8 lithium ion battery modules are connected in series with triangular connectors to form a lithium ion battery module 2. The lithium-ion battery module 2 is fixed in the box; the prepared electronic potting glue is poured into the box by potting method until the liquid level of the electronic potting glue is 15mm higher than the highest surface of the lithium-ion battery module 2, and the thickness of the surface is poured Control the thickness between 10mm~15mm and the thickness of the metal connector between 45mm~50mm, so as to ensure that the lithium ion battery module and the box are integrated without affecting the heat dissipation of the battery; then put the poured box into a vacuum oven Vacuum, the vacuum degree is -0.08Mpa, and keep it for 5min~10min. After opening to check the thickness meets the requirements, place it in a vacuum oven...

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Abstract

The invention discloses a preparation method of a lithium ion low-voltage power supply for a commercial vehicle. The method comprises the following steps: attaching a heating film to the surface of each lithium ion battery monomer, connecting a plurality of lithium ion battery monomers in parallel to form a lithium ion battery module, connecting a plurality of lithium ion battery modules in seriesto form a lithium ion battery module, and fixing the lithium ion battery module in a box body; pouring an electronic pouring sealant into the box body until the electronic pouring sealant completelycovers the lithium ion battery module; a controller, a temperature sensor and a switch are fixed to the inner surface of a cover plate, then the controller is connected with a lithium ion battery module in parallel and then connected with a positive pole and a negative pole on the cover plate, a heating film and the switch are connected to a heating module outside a box body after being connectedin series, and finally the cover plate is connected with the box body in a sealed mode. The lithium ion battery module is fixed in the box body through glue pouring, so that the lithium ion battery module has an anti-vibration function, cracking or falling of the battery module and a metal connecting body between the battery module and the module can be prevented, a vibration reduction effect is achieved, and the use of the whole vehicle under all working conditions can be met.

Description

Technical field [0001] The invention belongs to the technical field of low-voltage power supply for automobiles, and specifically relates to a preparation method of a lithium-ion low-voltage power supply for commercial vehicles. It is particularly suitable for commercial vehicles to meet the starting and parking conditions of the vehicle under different working conditions, different environmental requirements and parking conditions. Power supply capacity. Background technique [0002] With the development of new energy vehicles, the application of lithium-ion batteries in automobiles has become the mainstream. Lithium-ion low-voltage power supplies mainly include 12V, 24V, 36V and 48V. Their common characteristics are light weight, long cruising range, long service life, energy saving and environmental protection. Among them, 12V lithium-ion low-voltage power supplies are already in the application stage for cars, and 24V, 36V and 48V lithium-ion low-voltage power supplies have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0525H01M2/10H01M10/615H01M10/625H01M10/635H01M10/6571H01M50/20
CPCH01M10/058H01M10/0525H01M10/615H01M10/625H01M10/635H01M10/6571H01M2220/20H01M50/20Y02E60/10Y02P70/50
Inventor 孟仙雅冯修成周建刚刘立炳刘钊
Owner DONGFENG COMML VEHICLE CO LTD
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