CN111370806A - Battery pack honeycomb topology heat conduction structure for underwater vehicle - Google Patents
Battery pack honeycomb topology heat conduction structure for underwater vehicle Download PDFInfo
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- CN111370806A CN111370806A CN202010153835.6A CN202010153835A CN111370806A CN 111370806 A CN111370806 A CN 111370806A CN 202010153835 A CN202010153835 A CN 202010153835A CN 111370806 A CN111370806 A CN 111370806A
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- Prior art keywords
- underwater vehicle
- heat conduction
- battery
- section
- conduction structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/643—Cylindrical cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a honeycomb-shaped topological heat conduction structure of a battery pack for an underwater vehicle, which comprises a plurality of cylindrical lithium batteries and is characterized in that: the axial lines of the cylindrical lithium batteries are parallel to the axial line of the underwater vehicle, and the axial distances of any two adjacent cylindrical lithium batteries are equal on the axial cross section of the underwater vehicle. The invention can realize the theoretical maximum heat dissipation of the self space structure without using other heat conduction measures, and the structure is suitable for battery frame materials of various discharge batteries and has the characteristics of higher efficiency, simpler and controllable device.
Description
Technical Field
The invention relates to a heat conduction structure of a lithium battery pack, and belongs to the technical field of battery safety.
Background
The underwater vehicle is an underwater vehicle which can navigate, propel and guide automatically under water, is divided according to the operation mode and mainly comprises a manned underwater vehicle and an unmanned underwater vehicle. An Unmanned Underwater Vehicle (UUVs) mainly refers to a recoverable small-sized Underwater autonomous navigation carrier for Underwater reconnaissance, remote control operation and the like, and is an Unmanned intelligent small-sized equipment platform which takes a submarine or a surface ship as a support platform and can remotely navigate Underwater autonomously for a long time. The UUVs can be divided into two categories, namely thermal power and electric power. In comparison, the electrodynamic force propulsion system has the advantages of low noise, no flight path, no influence of flight depth on performance, simple structure, low cost, convenience in use and maintenance and the like. The development of electrodynamic systems mainly involves two aspects: a power battery and a propulsion motor.
The lithium battery is a latest generation green high-energy battery, is a novel electrochemical system which is rapidly developed from the beginning of the 80 s in the 20 th century, has the outstanding advantages of high and stable output voltage, small specific volume, high specific energy, small self-discharge, no memory effect, no pollution and the like, is rapidly developed in recent years, and occupies a leading position in the field of underwater vehicle power batteries with the outstanding cost performance advantage. As a lithium battery for the power of an underwater vehicle, the lithium battery can discharge large current for a long time and is one of the main performance indexes. However, a series of problems must be caused when the large-current discharge is carried out for a long time, wherein the most important is that the large-current discharge generates a large amount of heat, and the battery is positioned in the sealed battery compartment section, so that the heat dissipation efficiency is low, and the heat accumulation is further intensified. The effect of the generation of a large amount of heat on the safe use of the battery is very serious. First, the generation of a large amount of heat will cause the temperature of the battery to rise rapidly, and the rise in temperature has a great influence on the performance of the battery. Secondly, the heat accumulation inside the battery to a certain extent may cause deformation, leakage, even explosion and other dangers.
Therefore, an effective battery pack heat dissipation and conduction structure is designed, and it is very necessary to ensure that the heat generated by the battery pack in normal operation is in a safe and controllable range.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a structure for improving the heat conduction rate of a lithium battery pack in an enclosed space, which can ensure that the temperature of the battery pack is within the self safety temperature range of the battery under the normal working condition of the current underwater vehicle, and effectively improves the safety of heavy current discharge of the lithium battery in the enclosed space.
The technical scheme adopted by the invention for solving the technical problems is as follows: the battery pack honeycomb topology heat conduction structure for the underwater vehicle comprises a plurality of cylindrical lithium batteries, wherein the axes of the cylindrical lithium batteries are parallel to the axis of the underwater vehicle, and the axial distances between any two adjacent cylindrical lithium batteries are equal on the axial cross section of the underwater vehicle.
The number of the cylindrical lithium batteries is 0.7-0.8 times of the maximum number of the lithium batteries capable of being accommodated on the axial cross section of the underwater vehicle.
The axial cross section of the underwater vehicle is regarded as a circle, the maximum sectional area is calculated, and if the axial cross section is non-circular, 0.72-0.8 times of the maximum diagonal length of the axial cross section is taken as the diameter of the axial cross section, and the maximum sectional area is calculated.
The axle center distance between any two adjacent cylindrical lithium batteries is equal to 0.82-1.13% of the diameter of the axial cross section.
The invention has the beneficial effects that: by analyzing the vertical interface of the battery cabin section in the underwater vehicle, a honeycomb topology heat conduction structure which can meet the condition that the temperature of the battery pack is within the self-safety temperature range under the normal working condition can be obtained by utilizing structural simulation optimization through adjusting the distance between batteries. The cellular topological heat conduction structure is verified through optimization calculation and experiments, and on the premise of not using other heat conduction measures, the heat dissipation of the self space structure is theoretically maximized, and the structure is suitable for battery frame materials of various discharged batteries. It has the characteristics of more efficient, simpler and controllable device.
Drawings
Fig. 1 is a schematic vertical cross-sectional view of a honeycomb topology heat conduction structure and a distribution diagram of a battery to be tested according to an embodiment.
FIG. 2 is a graph showing transient temperature change curves of a battery under test in a designed honeycomb topology heat conduction structure.
Detailed Description
The present invention will be further described with reference to the following drawings and examples, which include, but are not limited to, the following examples.
The invention provides a honeycomb-shaped topological heat conduction structure of a battery pack for an underwater vehicle, which comprises the following structural design steps:
(1) determining the diameter of the external vertical section of the underwater vehicle, wherein the error is less than or equal to +/-3 mm;
the external vertical section of the underwater vehicle is mainly circular, and if the external vertical section of the underwater vehicle is non-circular, the length of the maximum diagonal is 0.72-0.8 times that of the maximum diagonal;
(2) analyzing the section in the step (1), and designing the maximum number of the lithium batteries which can be loaded by calculation by combining the diameter of the cylindrical lithium batteries;
wherein the diameter of the cylindrical lithium battery is mainly 18 mm; other diameters are also included depending on the conditions of use;
(3) designing and arranging 0.7-0.8 times of the maximum number of the batteries obtained in the step (2) in a vertical section of a battery cabin section in the underwater vehicle;
(4) distributing the number of the batteries obtained in the step (3) in the vertical section obtained in the step (1) according to the same number of circles, and ensuring that the distance between the centers of any two circles is equal through calculation, wherein the distance is equal to 0.82% -1.13% of the diameter of the vertical section of the underwater vehicle in the step (1);
wherein the circular diameter of the replacement battery is equal to the diameter of the cylindrical battery;
(5) and (4) filling the cylindrical battery into the structure obtained in the step (4), namely, the battery honeycomb topological heat conduction structure.
In the embodiment of the invention, the diameter of the vertical section of the battery cabin section for measuring the battery loaded by the underwater vehicle is 332mm, and the error is less than or equal to +/-3 mm; the diameter of a cylindrical 18650 lithium battery is 18mm, and the maximum number of lithium batteries which can be loaded is 340 through calculation and design; 238(340 × 0.7 ═ 238) circles with the diameter of 18mm are distributed in the vertical section of the cell cabin section, the distance between the centers of any two circles is ensured to be equal through calculation, the distance is 332mm × 0.82% ═ 2.722mm, and the structure is processed, so that the honeycomb topology heat conduction structure is obtained.
The following analytical tests were performed on the design:
the test equipment mainly comprises: the underwater vehicle battery cabin comprises 1 set of underwater vehicle battery cabin shell, 1 set of battery stacks (comprising 6 battery pack modules), 1 set of BMS100250C1 type lithium battery monitoring system, 1 high-power resistance wire, 1 electric soldering iron and a plurality of special leads.
The main process of the test is to assemble brand-new 18650 lithium iron phosphate batteries into a battery stack according to a 10-string 10-parallel mode and install the battery stack inside a cabin shell of an aircraft battery. And (3) placing the battery cabin section in a water pool at 10 ℃ to continuously discharge for 5h at 24A current, and monitoring and recording the transient temperature change condition of the battery to be detected in the battery cabin section by using a BMS100250C1 lithium battery monitoring system.
TABLE 1
Fig. 1 is a schematic distribution diagram of the batteries to be tested, and it can be found that the adjacent distances between any single batteries are equal.
Fig. 2 is a transient temperature change curve of a tested battery in a designed honeycomb topology heat conduction structure, table 1 shows the transient temperature change distribution of the tested battery in the designed honeycomb topology heat conduction structure, according to fig. 2 and table 1, the tested battery in a battery cabin section is continuously discharged for 5 hours in a water pool at 10 ℃ at 24A, the highest temperature of the battery cabin section is 68.8 ℃, and the temperature of the battery cabin section is increased by 58.8 ℃ through heat generated by battery stacking electricity. It can be found that the designed honeycomb topology heat conduction structure has better safety characteristic when discharging large current.
Claims (4)
1. A cellular topological heat conduction structure of group battery for underwater vehicle, includes a plurality of cylindrical lithium cell, its characterized in that: the axial lines of the cylindrical lithium batteries are parallel to the axial line of the underwater vehicle, and the axial distances of any two adjacent cylindrical lithium batteries are equal on the axial cross section of the underwater vehicle.
2. The battery pack honeycomb topology heat conduction structure for underwater vehicles according to claim 1, characterized in that: the number of the cylindrical lithium batteries is 0.7-0.8 times of the maximum number of the lithium batteries capable of being accommodated on the axial cross section of the underwater vehicle.
3. The battery pack honeycomb topology heat conduction structure for underwater vehicles according to claim 1, characterized in that: the axial cross section of the underwater vehicle is regarded as a circle, the maximum sectional area is calculated, and if the axial cross section is non-circular, 0.72-0.8 times of the maximum diagonal length of the axial cross section is taken as the diameter of the axial cross section, and the maximum sectional area is calculated.
4. The battery pack honeycomb topology heat conduction structure for underwater vehicles according to claim 3, characterized in that: the axle center distance between any two adjacent cylindrical lithium batteries is equal to 0.82-1.13% of the diameter of the axial cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153835.6A CN111370806A (en) | 2020-03-07 | 2020-03-07 | Battery pack honeycomb topology heat conduction structure for underwater vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153835.6A CN111370806A (en) | 2020-03-07 | 2020-03-07 | Battery pack honeycomb topology heat conduction structure for underwater vehicle |
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| Publication Number | Publication Date |
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| CN111370806A true CN111370806A (en) | 2020-07-03 |
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| CN202010153835.6A Pending CN111370806A (en) | 2020-03-07 | 2020-03-07 | Battery pack honeycomb topology heat conduction structure for underwater vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793971A (en) * | 2021-08-29 | 2021-12-14 | 西北工业大学 | High-heat-conductivity lithium battery pack for underwater vehicle |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793971A (en) * | 2021-08-29 | 2021-12-14 | 西北工业大学 | High-heat-conductivity lithium battery pack for underwater vehicle |
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Application publication date: 20200703 |