Battery Pack Temperature Control Circuit for Heat Dissipation
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Solution Overview
Problem
Existing battery packs face challenges in efficiently dissipating waste heat generated during operation, which can lead to temperature increases and potential damage, especially in high-power applications like motor vehicles.
Innovation Solution
A battery pack design featuring a hollow, electrically conductive temperature control element with insulating duct sections forming a common heat transfer circuit, allowing for effective heat dissipation without a heat transfer medium flowing through the housing, using a carrier and base plate with channel sections to manage heat transfer medium flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery cells are combined in series to achieve high output voltage, then electrical power is improved, but heat generation increases leading to temperature rise
Solution Approach 1:
A temperature control element is introduced as an intermediary component between adjacent battery cells. This element provides both electrical connection and thermal management functions, mediating between the high-power operation and heat dissipation requirements without requiring the housing to be flowed through by coolant
Solution Approach 2:
The temperature control element serves multiple functions simultaneously: it acts as an electrical conductor connecting battery cells in series, provides a pathway for heat dissipation, and maintains structural integrity. This multi-functionality allows high power operation while managing heat generation
2Temperature
If coolant flows through the housing to dissipate heat, then temperature control is improved, but the housing becomes complex and requires additional channels
Solution Approach 1:
The heat dissipation function is extracted from the housing structure and relocated to dedicated temperature control elements. This separation allows the housing to remain simple while the temperature control elements handle thermal management through their own integrated channels
Solution Approach 2:
Temperature control elements serve as intermediary components that handle heat dissipation separately from the housing. These elements provide dedicated thermal management pathways without requiring the housing itself to be complex or flowed through by coolant
3Reliability
If conductors are welded directly together for electrical connection, then electrical connectivity is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The temperature control element performs dual functions as both an electrical conductor and a heat dissipation pathway. By making this single component electrically conductive, the system achieves reliable electrical connections while simultaneously providing thermal management capability through its integrated channels
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
This design ensures safe and efficient heat dissipation, maintaining optimal operating temperatures, particularly for lithium-based battery cells, while preventing damage and ensuring high-current-resistant electrical connections.
Implementation Method 1
heat can be dissipated or supplied via the temperature control circuit in the area of the conductor by means of a heat-transferring medium
Implementation Method 2
a heat-transferring medium is guided through the temperature control circuit
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a battery pack comprising a plurality of individual flat battery cells (6), each having a cathode arrester (17) and an anode arrester (18). Two arresters (17, 18) of adjacent flat battery cells (5, 6) are electrically connected to each other. To achieve good heat dissipation, one arrester (17, 18) is in contact with an electrically conductive temperature control element (30). The base of the temperature control element (30) is hollow, and several temperature control elements (30), together with electrically insulating channel sections, form a common temperature control circuit (44).