Battery Pack Distribution Box Cooling With Integrated Circuit Breaker
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Solution Overview
Problem
The existing distribution boxes in battery packs face challenges with inefficient heat dissipation due to high voltage components and devices, leading to overheating and reduced service life, especially in electric vehicles requiring high power and long ranges.
Innovation Solution
A distribution box design incorporating a circuit breaker and a heat dissipation apparatus with a thermally conductive adhesive and semiconductor chilling plate to efficiently dissipate heat through a heat dissipation opening, reducing component count and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high voltage components and devices with large specifications are arranged in a small space distribution box, then the voltage and current requirements for long mile range and high power are met, but heat dissipation efficiency deteriorates leading to overheating
Solution Approach 1:
The patent extracts the heat dissipation function from the traditional housing-based heat dissipation holes and creates a dedicated heat dissipation apparatus. This apparatus includes a heat dissipation component with first and second heat dissipation surfaces, where the first heat dissipation surface contacts high voltage components while the second heat dissipation surface exposes to the external environment through a heat dissipation opening, effectively separating heat generation and heat dissipation functions.
Solution Approach 2:
The patent introduces a heat dissipation apparatus as an intermediary between the high voltage components and the external environment. The heat dissipation component acts as a mediator that conducts heat away from the components through thermally conductive materials, with the heat dissipation opening serving as an intermediary pathway for heat to escape to the surroundings.
2Ease of manufacture
If traditional heat dissipation holes on housing are used, then manufacturing is simple, but heat dissipation efficiency is low causing overheating and reduced service life
Solution Approach 1:
The patent segments the heat dissipation function into distinct components: a heat dissipation component separate from the housing, with dedicated heat dissipation surfaces. The first heat dissipation surface contacts the high voltage components while the second heat dissipation surface faces outward, creating a segmented heat dissipation pathway that improves efficiency while maintaining manufacturing feasibility through modular assembly.
3Temperature
If multiple heat dissipation holes are created on housing, then heat dissipation area increases, but housing structure complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the heat dissipation function with a dedicated heat dissipation apparatus rather than modifying the housing structure. The heat dissipation component integrates both heat conduction (through its structure) and heat dissipation (through the second heat dissipation surface exposed via the opening), combining multiple functions into a single component that reduces overall structural complexity.
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
Enhances heat dissipation efficiency, prolongs the service life of components, and reduces manufacturing costs by effectively managing heat generation within the distribution box.
Implementation Method 1
A first side surface of the first thermally conductive adhesive is thermally connected with the first conductive connection member, the second conductive connection member, the third conductive connection member, and the fourth conductive connection member. A second side surface of the first thermally conductive adhesive is thermally connected with the heat dissipation module.
Implementation Method 2
The heat dissipation apparatus is arranged at a heat dissipation opening of the box body. The heat dissipation opening is provided on a side of the box body corresponding to positions where the circuit breaker is connected to the positive circuit and the negative circuit.
Data Source
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AI summary
A distribution box, a battery pack, and a vehicle. The distribution box includes a box body, a positive circuit, a negative circuit, a circuit breaker, and a heat dissipation apparatus. The positive circuit is arranged inside the box body. The positive circuit includes a first conductive connection member and a second conductive connection member. The negative circuit is arranged inside the box body. The negative circuit includes a third conductive connection member and a fourth conductive connection member. A first positive terminal of the circuit breaker is connected with an end of the first conductive connection member. A second positive terminal of the circuit breaker is connected with an end of the second conductive connection member. A first negative terminal of the circuit breaker is connected with an end of the third conductive connection member. A second negative terminal of the circuit breaker is connected with an end of the fourth conductive connection member. The heat dissipation apparatus is arranged at a heat dissipation opening of the box body. In the distribution box of the present disclosure, the circuit breaker is used, which reduces a quantity of components and devices in the distribution box and reduces manufacturing costs. Through use of the heat dissipation apparatus, heat dissipation of the components and devices in the distribution box can be accelerated through the heat dissipation opening, thereby increasing a service life of the components and devices.