Battery Box Bottom Guard Plate Fixation With Connecting Assembly

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Solution Overview

Problem

Existing battery boxes face challenges with complex and heavy steel bottom guard plates that require intricate shaping, leading to high production and maintenance costs, and unreliable fixation due to direct suspension, compromising safety and protection.

Innovation Solution

A battery box design featuring a flat bottom guard plate connected via a connecting assembly, utilizing composite materials and innovative fastening mechanisms to securely attach the guard plate to the box body, avoiding suspension and optimizing fixation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a complex-shaped steel bottom guard plate is used to form an effective lock attachment with the battery box, then the fixation reliability is improved, but the weight increases and anti-corrosion performance deteriorates

Engineering Contradiction:

Improvefixation reliabilityVSAvoidbottom guard plate weight

Core Design Contradiction:

ReliabilityVSWeight of stationary object

Solution Approach 1:

The bottom guard plate is divided into a flat plate portion and a separate connecting assembly. The connecting assembly includes a connecting plate and connecting members that are pre-installed on the box body, allowing the flat plate to be securely attached without requiring complex shaping of the entire plate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bottom guard plate uses a composite structure combining a flat plate (which can be made of lighter materials) with a connecting assembly that provides the fixation function. This separates the protective function from the fixation function, allowing optimization of each component independently.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a complex-shaped steel bottom guard plate is molded and processed to form an effective lock attachment, then the fixation reliability is improved, but the production cost increases

Engineering Contradiction:

Improvefixation reliabilityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of shaping the bottom guard plate to match the box body contours, the invention inverts the approach by installing connecting members on the box body first, then attaching a simple flat plate to these pre-positioned connectors. This reverses the traditional manufacturing sequence and simplifies plate production.

Inventive Principle:

Principle #13The other way round (Inversion)

3Strength

If the whole bottom guard plate is made of steel plate, then the strength is improved, but the anti-corrosion performance deteriorates and maintenance cost increases

Engineering Contradiction:

Improvebottom guard plate strengthVSAvoidcorrosion resistance

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The connecting assembly includes connecting members that are strategically positioned at critical attachment points. These localized reinforcement elements provide necessary strength and corrosion resistance only where needed for fixation, rather than requiring the entire plate to be made of heavy steel.

Inventive Principle:

Principle #3Local quality

4Weight of stationary object

If a flat plate bottom guard plate is used, then the weight is reduced and production cost decreases, but the fixation reliability deteriorates due to direct suspension

Engineering Contradiction:

Improvebottom guard plate weightVSAvoidfixation reliability

Core Design Contradiction:

Weight of stationary objectVSReliability

Solution Approach 1:

The connecting assembly acts as an intermediary between the flat bottom guard plate and the box body. It includes connecting members that are pre-installed on the box body and connecting plates that attach to the flat plate, providing reliable fixation without requiring the flat plate itself to be complex-shaped.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4672432A1Battery box and battery pack

Publication Date: 2025.12.31 EVE ENERGY CO LTD

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AI summary

Disclosed in the present application are a battery box and a battery pack. The battery box includes a box body (1); a bottom guard plate (2), in a form of a flat plate, the bottom guard plate (2) being spaced apart from the box body (1) and an overhanging portion is formed between the bottom guard plate and the box body (1); and a connecting assembly (3), provided in the overhanging portion. Both of the box body (1) and the bottom guard plate (2) are connected with the connecting assembly (3) to allow the bottom guard plate (2) to be attached to the box body (1).