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Battery casing and manufacturing process for the battery

A technology of a battery case and a manufacturing method, which is applied to battery pack parts, circuits, electrical components, etc., can solve the problems of inability to connect well, peel off, and the lead plate is not easy to melt, so as to improve production efficiency and increase capacity. , high consistency effect

Inactive Publication Date: 2009-06-17
SHENZHEN BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the good conductivity and heat dissipation of aluminum, the above welding methods have the following disadvantages: 1) the resistance welding method cannot be used for good connection; 2) if the ultrasonic welding method is used, the lead plate cannot be easily melted connection; 3) If the laser welding method is used, cracks or bubbles are prone to occur at the welded part of the battery case
In addition, after welding by the above three methods, the nickel strip is easier to peel off from the shell due to the corrosion of the electrolyte.

Method used

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  • Battery casing and manufacturing process for the battery
  • Battery casing and manufacturing process for the battery
  • Battery casing and manufacturing process for the battery

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Embodiment Construction

[0020] A method for making an aluminum alloy battery, comprising the step of making a case, the step of making the case further includes the following steps:

[0021] Such as figure 1 As mentioned above, using the CA heat compounding method (that is, controlled atmosphere heat compounding), the CA heat compounding temperature is 550±50°C, and according to the size requirements of the aluminum alloy shell to be produced, a small piece of nickel with a thickness of 0.1mm The strips 1 are respectively compounded on the 3-series aluminum alloy plate 2 with a thickness of 0.6mm, so that each section of the nickel strip 1 and the aluminum alloy plate 2 form a uniform monomer;

[0022] According to the size requirements of the aluminum alloy shell to be produced, the aluminum alloy plate 2 compounded with the nickel strip 1 is cut and punched into figure 2 The aluminum alloy casing 3 shown, the stamping here is that described nickel strip 1 is stamped on the bottom of the aluminum ...

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Abstract

The invention discloses a manufacturing method for battery cases and batteries, which comprises steps as following: utilizing the CA thermal compound process to respectively compound segments of metal materials easy to be welded to an aluminum alloy plate or a pure aluminum plate according to the dimension requirements of a case required to be manufactured, thereby forming a uniform unit between each segment of metal materials easy to be welded and the aluminum alloy plate or the pure aluminum plate, and then cutting and punching the aluminum alloy plate or the pure aluminum plate compounded with the easy-welded metal materials to the case according to the dimension requirements of the case to be manufactured, wherein the punching relates to punching the metal materials easy to be welded to the outside of the case. By utilizing the technical scheme, metal materials easy to be welded can be processed on the battery casing firmer.

Description

technical field [0001] The invention relates to a manufacturing method of a battery casing. Background technique [0002] In lithium-ion batteries, in order to prevent abnormal behaviors such as overcharging, over-discharging, and short-circuiting of the battery, a protective circuit for controlling the battery voltage and current is provided outside the lithium-ion battery cell. Considering the connection with the protective circuit, the battery case It must be a material that is convenient for welding or provide the necessary lead-out device. [0003] At present, the materials used for the battery case mainly include: stainless steel or nickel-plated steel, aluminum alloy, aluminum-plastic film, etc. Among them, stainless steel or nickel-plated steel can be easily welded without the need for a lead-out device, and the battery packaged in aluminum-plastic film is directly provided with tabs, so welding is more convenient. [0004] In order to obtain greater mass energy de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M50/119
CPCY02E60/12Y02E60/10
Inventor 王伟强邹晓兵
Owner SHENZHEN BAK BATTERY CO LTD
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