Busbar for high-safety power battery module and manufacturing method of busbar

A power battery and busbar technology, which is applied to battery components, secondary batteries, circuits, etc., can solve the problems of unable to cut off the circuit in time, thermal runaway of the module, and no safety protection, so as to avoid thermal runaway and over-control Accurate stream size and improved security

Active Publication Date: 2021-02-02
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the production process of power battery modules, the busbars used in series and parallel connection between batteries are copper or aluminum bars. The copper or aluminum bars themselves have no safety protection. When an external short circuit occurs, the circuit cannot be cut off in time, causing the module to fail Thermal runaway, burning the module, may eventually cause a safety accident

Method used

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  • Busbar for high-safety power battery module and manufacturing method of busbar
  • Busbar for high-safety power battery module and manufacturing method of busbar
  • Busbar for high-safety power battery module and manufacturing method of busbar

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Effect test

Embodiment 1

[0046] This embodiment provides a method for preparing a busbar. Such as figure 1 As shown, the bus bar includes a base material 1 , a semiconductor layer 2 of a PTC thermistor, a metal layer 3 and a terminal 4 . The preparation of the busbar includes:

[0047]Substrate production: According to the ratio of PE: SP = 95%: 5%, melting and mixing molding is carried out to make a thickness of 200 μm and a conductivity of 10 -8 s / m substrate.

[0048] Production of the PTC coating material: According to the weight ratio of PE: yttrium oxide: barium titanate = 74%: 2%: 24%, melting and mixing are carried out to prepare a uniform coating material.

[0049] PTC coating: Corona treatment is carried out on the above substrate, and then the prepared PTC coating material is coated on the substrate by electrostatic spraying to form the semiconductor layer of the PTC thermistor, the semiconductor layer of the PTC thermistor The thickness is 100 μm.

[0050] Plating metal layer: use mag...

Embodiment 2

[0054] This embodiment provides a method for preparing a busbar. Such as figure 1 As shown, the bus bar includes a base material 1 , a semiconductor coating 2 of a PTC thermistor, a metal layer 3 and a terminal 4 . The preparation of the busbar includes:

[0055] Substrate production: According to the ratio of PE: SP = 97.5%: 2.5%, perform mixed molding to make a thickness of 300 μm and a conductivity of 10 -9 s / m substrate.

[0056] Production of PTC coating material: According to the ratio of PE: yttrium oxide: barium titanate = 74%: 2%: 24%, melting and mixing are carried out to make a uniform coating material.

[0057] PTC coating: Corona treatment is carried out on the above substrate, and then the prepared PTC coating material is coated on the substrate by electrostatic spraying to form the semiconductor layer of the PTC thermistor, the semiconductor layer of the PTC thermistor The thickness is 200 μm.

[0058] Plating metal layer: use magnetron sputtering to plate ...

Embodiment 3

[0062] This embodiment provides a method for preparing a bus bar. Such as figure 1 As shown, the bus bar includes a base material 1 , a semiconductor coating 2 of a PTC thermistor, a metal layer 3 and a terminal 4 . The preparation of the busbar includes:

[0063] Substrate production: According to the ratio of PP: SP = 95%: 5%, perform mixed molding to make a thickness of 200 μm and a conductivity of 10 -8 s / m substrate.

[0064] Production of PTC coating materials: According to the ratio of PE: yttrium oxide: barium titanate = 80%: 3%: 17%, melting and mixing are carried out to make a uniform coating material.

[0065] PTC coating: Corona treatment is carried out on the above substrate, and then the prepared PTC coating material is coated on the substrate by electrostatic spraying to form the semiconductor layer of the PTC thermistor, the semiconductor layer of the PTC thermistor thickness

[0066] Plating metal layer: A layer of metal copper is plated on the semiconduc...

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Abstract

The invention provides a busbar for a high-safety power battery module and a manufacturing method of the busbar. The busbar comprises a plate-shaped base material and at least one plating layer unit covering the surface of the base material, each plating layer unit is a multi-layer structure and comprises at least one semiconductor layer of a PTC thermistor and at least one metal layer, and the metal layers are alternately provided with full plating areas and pattern plating areas at intervals along a current path. Each pattern plating area comprises a plurality of metal sheet micro-units, andthe metal sheet micro-units are connected through contacts, and the metal sheet micro-units and the full plating areas are connected through the contacts. When an external short circuit occurs and alarge current passes through, the contacts of the pattern plating areas are fused, the micro unit is independent, and a conductive path is disconnected. And meanwhile, an internal resistance of the semiconductor layer of the PTC thermistor is increased due to heating so that an open-circuit effect is further achieved, and a dual-protection effect is realized. The busbar provided by the invention can greatly improve the safety performance of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery manufacturing, in particular to a high-safety power battery module busbar and a manufacturing method thereof. Background technique [0002] Lithium-ion battery (Lithium-ion Battery) is a new type of green and environmentally friendly chemical power source that appeared in the early 1990s. It has the advantages of high voltage (single battery voltage up to 3.6V, large specific energy (100-130Wh / Kg), stable discharge voltage, good cycle performance, excellent safety performance, and long storage and working life. It is the latest chemical power supply industry. One of the directions of development. [0003] In the production process of power battery modules, the busbars used in series and parallel connection between batteries are copper or aluminum bars. The copper or aluminum bars themselves have no safety protection. When an external short circuit occurs, the circuit cannot be cut off...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/505H01M50/516H01M50/517H01M50/526H01M50/524H01M50/581H01M50/583H01M10/0525
CPCH01M10/0525Y02E60/10
Inventor 李缜吴洋洋王启岁汪涛张沿江娄帅帅
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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