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CN-121983737-A - Immersed high-power battery system based on built-in runner and composite packaging

CN121983737ACN 121983737 ACN121983737 ACN 121983737ACN-121983737-A

Abstract

The invention discloses an immersed high-power battery system based on a built-in runner and composite packaging. The system core is that an insulating tube is preset in the battery core to form a cooling flow channel, and an inner insulating layer, a structural reinforcing layer for filling the flow channel and an outer protective layer are sequentially applied to the battery core to form an integrated composite packaging body. The packaged battery cell units are placed in a sealed housing and immersed in a cooling medium to form a standard module. The module housing is provided with a standardized interface supporting the free assembly of a plurality of modules and the integration of the cooling circuit. The invention systematically solves the problems of heat dissipation, mechanical reliability and environmental sealing of the high-power battery through the determined materials and the determined process, has high configuration flexibility, and is suitable for power application under extreme working conditions.

Inventors

  • FANG CUIPING

Assignees

  • 方翠萍

Dates

Publication Date
20260505
Application Date
20260325

Claims (9)

  1. 1. A battery system capable of being assembled freely is characterized by comprising a plurality of standard battery unit modules with the same structure, wherein the modules are assembled through standardized interfaces on a shell of the standard battery unit modules, each standard battery unit module comprises a soft package electric core with a cooling flow channel arranged inside, a composite packaging body which is combined with the electric core in a conformal mode and comprises a structure reinforcing layer, the cooling flow channel is filled with materials of the structure reinforcing layer, and a sealing shell is used for accommodating the electric core and a cooling medium.
  2. 2. The battery system of claim, wherein the composite package further comprises an inner insulating layer between the structural reinforcement layer and the electrical cell, and an outer protective layer outside the structural reinforcement layer.
  3. 3. The battery system of claim, wherein the cooling flow channel is formed from an insulating tubular preform that is placed during cell fabrication.
  4. 4. The battery system of claim, wherein the inner insulating layer is comprised of a flexible polymer layer formed by a vacuum pressure impregnation process.
  5. 5. The battery system of claim, wherein the structural reinforcement layer is composed of a thermosetting resin layer formed by a vacuum potting process and filling the cooling flow channels.
  6. 6. The battery system of claim, wherein the sealed housing is provided with a mechanical interface, an electrical interface, and a fluid interface, the fluid interface being a quick-connect connector.
  7. 7. A method of manufacturing the standard cell module of claim, comprising the steps of integrating an insulating tubular preform into the cells to form a cooling runner, forming an inner insulating layer by a vacuum pressure impregnation process, filling the cooling runner with a thermosetting resin by a vacuum potting process and cladding the cells to form a structural reinforcement layer.
  8. 8. The method of claim, further comprising the step of roughening the outer surface of the structural reinforcement layer and preparing a ceramic protective layer.
  9. 9. The battery system of claim, wherein the cooling flow channels of a plurality of the modules are in parallel communication via the fluid interface to form an integrated cooling circuit.

Description

Immersed high-power battery system based on built-in runner and composite packaging Technical Field The invention relates to the technical field of power batteries, in particular to a battery system suitable for high-power, high-vibration and high-corrosion environments. In particular, the present invention relates to a battery module in which a through cooling flow passage is constructed inside a battery cell and a full-immersion heat dissipation and multilayer composite packaging technology is adopted, and a method of manufacturing the same. Background In application scenarios (such as special engineering machinery and electric racing vehicles) requiring continuous high-power discharge and extreme environmental tolerance, the power battery system faces key technical challenges such as heat dissipation bottleneck, insufficient mechanical reliability, environmental sealing failure and the like. The traditional battery pack adopts an external cooling mode, the heat dissipation efficiency is limited by a heat resistance path, and the sealing structure is difficult to resist high-pressure flushing, high-salt spray corrosion and severe vibration for a long time. In addition, the appearance and the interface of the existing battery system are fixed, and the battery system cannot be flexibly configured according to the installation space, so that the electric upgrading cost is high. Therefore, a new battery solution capable of systematically solving the problems of heat dissipation, reliability and integration flexibility is needed. Disclosure of Invention The invention aims to provide a modularized battery system with high power density, high reliability and high integration level. The battery system is characterized in that a through cooling flow channel is prefabricated in the battery core, full-immersion heat dissipation is adopted, efficient core heat management is achieved, an integrated composite packaging body is constructed, excellent mechanical strength and environment tightness are provided for the soft package battery core, and a battery system can be freely assembled and conveniently integrated to target equipment through a standardized module design. In order to achieve the above object, the present invention provides a modular battery system that can be assembled freely. The system is formed by assembling a plurality of standard battery unit modules with the same structure through standardized interfaces on the shell of the standard battery unit modules. Each standard battery unit module comprises a single battery core internally provided with a through cooling flow channel, an integrated composite packaging body which is conformally combined with the battery core, wherein the packaging body sequentially comprises an inner insulation buffer layer, a structural reinforcement framework layer and an outer protection function layer from inside to outside, the cooling flow channel is completely filled with materials of the structural reinforcement framework layer, a fully immersed unit shell is a sealed shell and is used for accommodating the packaged battery core and filling cooling medium, so that the battery core is completely immersed, and a standardized mechanical interlocking interface, an electrical connection interface and a standardized fluid interface are integrated on the unit shell. A plurality of the standard battery cell modules may be physically connected, electrically interconnected, and in communication with a cooling circuit through an interface on their housings to form an integrated battery system, and the integrated cooling circuit may be connected to an external cooling device through the fluid interface. The battery system has the advantages that the cooling medium can directly flow through the internal flow channel of the battery core to realize efficient core heat dissipation, the integrated composite packaging body remarkably improves the mechanical strength and environmental tolerance of the battery core, the modular design supports free assembly according to requirements to realize flexible capacity, voltage and shape configuration, and the standardized interface and the integrable cooling circuit design greatly reduce the complexity of system installation and maintenance. Drawings Fig. 1 is a schematic view of the external structure of a standard battery cell module according to the present invention. Fig. 2 is an exploded view of an assembly of the standard cell module of the present invention. Fig. 3 is a schematic perspective view of a single cell after integrated composite packaging in the present invention. Fig. 4 is a schematic cross-sectional structure of the single cell in fig. 3. Fig. 5 is a partially enlarged cross-sectional schematic view of the area of the composite package of fig. 4. The reference numerals indicate that 1 is a cooling tank shell, 2 is an upper sealing cover body, 3 is a soft package battery core body, 4 is a lower end supporting base, 5 is a pos