Lithium battery assembly capable of providing high discharge pulse within wide temperature range, and forming method

A technology of lithium batteries and lithium-ion batteries, applied in electrical components, secondary batteries, circuits, etc., can solve problems such as poor low-temperature performance and limited applications, and achieve the effect of reducing aging

Inactive Publication Date: 2016-12-14
SHENZHEN LONGSING NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the poor low-temperature performance of lithium-ion batteries (typical operating temperature > -10°C), this type of composite battery power supply has limited applications in fields such as outdoor communications and smart meter reading systems.

Method used

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  • Lithium battery assembly capable of providing high discharge pulse within wide temperature range, and forming method
  • Lithium battery assembly capable of providing high discharge pulse within wide temperature range, and forming method
  • Lithium battery assembly capable of providing high discharge pulse within wide temperature range, and forming method

Examples

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Effect test

Embodiment 1

[0048] In order to demonstrate the superior performance of the embodiment of the present invention, a rechargeable secondary lithium-ion battery was constructed according to the scheme involved in the present invention, and related basic tests were carried out.

[0049] A pouch type test battery was fabricated using the following components. The anode is made of 9-micron copper foil, and a carbon-based anode: carbon powder: PVDF (80:10:10w%) hard material mixture layer is coated on both sides of the copper foil with a thickness of 27.5 microns (each side). The carbon-based anode material particles are flakes with a thickness of 100-200 nanometers and a diameter of 500 nanometers to 5 micrometers, the total thickness of the anode is 64 micrometers, the width of the anode is 22 millimeters, and the length of the anode is 1185 millimeters. Herein, "w%" all represent mass percent.

[0050] The cathode selects 20 micron aluminum foil as the carrier, and the cathode material with a...

Embodiment 2

[0053] Lithium-ion batteries were manufactured using the processes and materials described in Example 1 above, wherein the anode material used was a spherical carbon-based anode material, and the particle size of the spherical carbon-based anode material was 1 micron to 10 microns. The battery prepared in this embodiment is charged and discharged with a current of 1C in the voltage range of 2.75-3.76, and the measured capacity is about 35mAh.

Embodiment 3

[0055] The flow process and materials described in the above-mentioned embodiment 1 are used to manufacture lithium-ion batteries, wherein the anode material uses a sheet-like carbon-based material, and the particle thickness of the sheet-like carbon-based material is 500 nanometers to 21 microns, and the diameter is 30 microns to 100 microns. The battery is charged and discharged with a current of 1C within the voltage range of 2.75-3.76, and its measured capacity is about 47mAh.

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Abstract

Disclosed is a rechargeable secondary lithium ion battery, having an improved anode material, cathode material and electrolyte solution, so as to reduce the formation of dendrites by deposits of lithium metal on the surface of carbonaceous material when lithium ions are inserted into the carbonaceous material during charging, and mitigate the risk of side reactions. Also disclosed are a lithium battery assembly capable of providing a high discharge pulse within a wide temperature range, and a forming method. The lithium battery assembly comprises a primary lithium / oxyhalide battery and a rechargeable secondary lithium ion battery connected in parallel to the primary lithium / oxyhalide battery, the open circuit voltage of the rechargeable secondary lithium ion battery in a full state being higher than that of the primary lithium / oxyhalide battery connected in parallel. Since the open circuit voltage of the rechargeable secondary lithium ion battery in the full state is higher than that of the primary lithium / oxyhalide battery connected in parallel, the rechargeable secondary lithium ion battery is lower than the full state when the two batteries are connected in parallel and under a load end open circuit condition, thereby alleviating ageing and self-discharging caused by side reactions.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery assembly capable of providing high discharge pulses in a wide temperature range and a forming method. Background technique [0002] With the rapid development of wireless communication technology, mobile devices have been fully digitized and their functions are becoming increasingly complex. Correspondingly, the demand for power in the working mode of the device is transformed into instantaneous high-current pulses for wireless data transmission. Taking the Global System for Mobile Communications (GSM) as an example, its typical demand is 2A, 500ms pulse current. Another example is the rapidly developing smart meter reading (AMR) system in recent years. It has the ability to automatically collect digital water and electricity meter readings, and regularly transmits data to mobile collection terminals through wireless communication, and further uploads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M16/00H01M10/0525
CPCH01M10/0525H01M16/00H01M10/38Y02E60/10Y02P70/50
Inventor 王然石徐祯祥黎胜
Owner SHENZHEN LONGSING NEW ENERGY TECH
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