Battery Module Thermal Resin Cooling for Electrode Lead Heat

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Solution Overview

Problem

Conventional battery modules experience performance degradation due to heat generation at electrode leads during charging and discharging, leading to potential damage of battery cells.

Innovation Solution

A battery module design incorporating a plurality of battery cells stacked within a module case, filled with thermal resin that covers electrode leads, and a heatsink for cooling, with resin injection holes and filling check holes for efficient resin distribution and heat management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If battery cells are connected in series or parallel to increase output voltage and charge/discharge capacity, then the battery pack's electrical performance is improved, but the heat generation at electrode leads increases due to higher current and resistance

Engineering Contradiction:

Improveoutput voltage and charge/discharge capacityVSAvoidheat generation at electrode leads

Core Design Contradiction:

PowerVSObject-generated harmful factors

Solution Approach 1:

The patent applies thermal resin with high thermal conductivity to the electrode leads, converting the harmful heat generation into a manageable thermal flow. The thermal resin captures the heat at the electrode leads and directs it toward the heatsink, transforming the harmful thermal energy into a controlled heat transfer process that protects the battery cells.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The thermal resin acts as an intermediary substance between the electrode leads and the heatsink. It fills the space around the electrode leads and provides a thermal conduction path, mediating the heat transfer from the high-resistance electrode leads to the cooling heatsink, thereby reducing temperature rise at critical points.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If conventional cooling methods are used without targeted thermal management at electrode leads, then the overall battery module structure is simple, but the temperature rise at electrode leads causes performance degradation and potential damage

Engineering Contradiction:

Improvecooling system structureVSAvoidbattery cell durability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies thermal resin specifically to the electrode leads rather than uniformly cooling the entire battery module. This localized thermal management approach targets the specific area where heat generation is most problematic (the electrode leads with high resistance), providing enhanced cooling where needed while maintaining overall structural simplicity.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The thermal resin is pre-applied to the electrode leads before final assembly of the battery module. This preliminary thermal management preparation ensures that the critical electrode leads are protected from temperature rise before the module is completed and put into operation, preventing performance degradation from the outset.

Inventive Principle:

Principle #10Preliminary action

3Temperature

If thermal resin is applied to cover electrode leads for heat dissipation, then the temperature rise at electrode leads is suppressed, but the assembly process and resin application become more complex

Engineering Contradiction:

Improvetemperature rise at electrode leadsVSAvoidresin application process

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The patent uses injection holes to introduce thermal resin into the battery module structure. This injection method allows the thermal resin to be delivered precisely to the electrode leads area through controlled fluid flow, simplifying the application process compared to manual application methods while ensuring proper coverage of the critical thermal zones.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Effectively suppresses temperature rise at electrode leads, minimizing damage and extending battery cell life by efficiently transferring heat away from the electrode leads to the heatsink, while simplifying the assembly process and reducing the risk of component interference.

Implementation Method 1

a thermal resin filled in the module case to cover at least a portion of electrode leads of the plurality of battery cells... efficiently transferring heat away from the electrode leads to the heatsink

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

a heatsink mounted to one side of the module case to cool the plurality of battery cells... for efficiently transferring heat away from the electrode leads to the heatsink

Methodology Applied

Scientific EffectHeat sink: Heat Sink

Data Source

PatentUS11652248B2Battery module and battery pack comprising same battery module

Publication Date: 2023.05.16 LG ENERGY SOLUTION LTD

AI summary

A battery module includes a plurality of battery cells stacked on each other, a heatsink configured to cool the plurality of battery cells, a module case having one side to which the heatsink is mounted, the module case being configured to accommodate the plurality of battery cells, and a thermal resin disposed inside the module case. The thermal resin is filled in the module case to cover at least a portion of electrode leads of the plurality of battery cells, and the thermal resin extends alongside the heatsink.