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A phase-change liquid-cooled combined cooling device for a lithium iron phosphate battery pack

A cooling device, lithium iron phosphate technology, applied in battery pack parts, batteries, secondary batteries, etc., can solve the problem of only a single cycle

Active Publication Date: 2018-08-03
DONG GUAN LONGTTECH COMPANY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phase change heat dissipation has the advantages of compact structure and no increase in energy-consuming components, but the biggest disadvantage is that the battery pack must carry a sufficient amount of phase change materials to absorb heat. Once the phase change materials are all changed from solid to liquid, they cannot quickly Return to solid state and absorb heat again, i.e. only single cycle

Method used

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  • A phase-change liquid-cooled combined cooling device for a lithium iron phosphate battery pack
  • A phase-change liquid-cooled combined cooling device for a lithium iron phosphate battery pack
  • A phase-change liquid-cooled combined cooling device for a lithium iron phosphate battery pack

Examples

Experimental program
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Effect test

Embodiment 1

[0045] As shown in the figure, a phase-change liquid-cooled combined cooling device for a lithium iron phosphate battery pack includes a battery sub-assembly 1 which is formed by connecting a plurality of cylindrical battery cells 2 head to tail in series;

[0046] It includes a first cooling tube 3, the outer peripheral surface of the first cooling tube 3 is provided with at least four battery receiving portions 4 along the axial direction and center-symmetrically, and the battery receiving portions 4 are arc grooves. The diameter of the circular arc groove is larger than the diameter of the battery cell 2. The adjacent battery receiving parts 4 are connected by an inner butting arc 12 with the same butting radius R; at least four of the battery sub-groups 1 are centrally symmetrical and the left end output electrode is alternately arranged on the outer periphery of the first cooling tube 3 Section 4.

[0047] The second cooling pipe 5 is also included, and the second cooling pip...

Embodiment 2

[0058] The cross section of the battery pack receiving tube unit 100 is circular or regular polygon, that is, the cross section of the outer tube 10, the second cooling tube 5, the first cooling tube 3, and the third cooling tube 7 are all the same. , Is a circle or regular polygon.

[0059] The battery pack storage tube unit 100 includes a battery containing cooling part 100.1, a first cooling liquid storage part 100.2, and a second cooling liquid storage part 100.3. The first cooling liquid reservoir 100.2 and the second cooling liquid reservoir 100.3 are respectively adjacent to the left and right ends of the battery accommodating cooling portion 100.1 and are separated in the outer tube 10 by a separator 11. The second cooling cycle control device is provided in the second cooling liquid reservoir 100.3. The first cooling cycle control device 18 and the second cooling cycle control device 19 also include a return tank, a heat exchanger, and a water storage tank. The return ...

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Abstract

A phase-change liquid-cooled combined cooling device for a lithium iron phosphate battery pack, comprising a first cooling pipe (3) and a second cooling pipe (5), and the outer peripheral surface of the first cooling pipe (3) is axially and centrally symmetrical There are at least 4 battery storage parts (4); the second cooling pipe (5) is symmetrically provided with a storage fastening part (6) along the axis center, and the inner peripheral surface of the second cooling pipe (5) and The outer peripheral surface of the first cooling pipe (3) is matched to form at least four battery storage holes (8); the battery subgroup (1) is arranged in the battery storage holes (8); and a solid-liquid phase change cooling unit (200) is also included , the solid-liquid phase change cooling unit includes an inner cooling hole (30) and an outer cooling hole (50), and the inner cooling hole (30) and the outer cooling hole (50) are filled with frame-shaped Copper foam and solid-liquid phase change working medium. The phase change liquid cooling combined cooling device of the lithium iron phosphate battery pack greatly improves the cooling and heat dissipation capacity of the battery pack.

Description

Technical field [0001] The invention relates to the technical field of lithium iron phosphate batteries, in particular to a phase change liquid cooling combined cooling device for lithium iron phosphate battery packs. Background technique [0002] Lithium iron phosphate battery has become the best candidate for new energy vehicle power system due to its high specific energy, no pollution and no memory effect. However, lithium-ion batteries are very sensitive to temperature, and the battery pack can discharge efficiently and maintain good performance within a suitable temperature range. Problems such as fast aging speed, fast increase in thermal resistance, fewer cycles, and short service life will occur at high temperatures. To control the operating temperature of the battery pack within an ideal range, certain heat dissipation measures must be adopted. The design of the lithium battery heat dissipation system emphasizes two target parameters. One is that the maximum temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/653H01M10/6551H01M10/6556H01M10/6557H01M10/6568H01M10/659H01M2/10H01M50/249
CPCH01M10/613H01M10/625H01M10/653H01M10/6551H01M10/6556H01M10/6557H01M10/6568H01M10/659H01M2220/20H01M50/20Y02E60/10
Inventor 邓通吴传官
Owner DONG GUAN LONGTTECH COMPANY LTD