CN109037787B - New energy automobile lithium ion battery pack structure and 18650 battery manufacturing method thereof - Google Patents
New energy automobile lithium ion battery pack structure and 18650 battery manufacturing method thereof Download PDFInfo
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- CN109037787B CN109037787B CN201811040184.9A CN201811040184A CN109037787B CN 109037787 B CN109037787 B CN 109037787B CN 201811040184 A CN201811040184 A CN 201811040184A CN 109037787 B CN109037787 B CN 109037787B
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000017525 heat dissipation Effects 0.000 claims abstract description 10
- 239000003792 electrolyte Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- H01M10/625—Vehicles
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
-
- 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
-
- 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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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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)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a lithium ion battery pack structure of a new energy automobile, which comprises a shell, wherein an embedding groove is formed in the outer side of the shell, a heat exchange unit is embedded in the embedding groove, the shell comprises a bottom plate, an outer shell and an inner shell, a first heat conduction cavity is formed between the outer shell and the inner shell, a first heat conduction hole penetrates through the inner shell, a plurality of connecting mechanisms are fixedly arranged on the inner wall of the inner shell, an installation shell is fixedly arranged at the end part of each connecting mechanism, a plurality of battery cavities are formed in the installation shell, a limiting groove is formed in the inner wall of each installation shell, and a blocking mechanism is arranged between the battery cavities. The lithium ion battery pack has good heat dissipation capacity and self-protection effect, can effectively deal with the heating phenomenon generated in the working process and prevent the new energy automobile from generating bumping action on the 18650 battery in the advancing process, and has more excellent design performance and longer service life compared with the lithium ion battery pack in the prior art.
Description
Technical Field
The invention relates to the technical field of new energy automobile batteries, in particular to a lithium ion battery pack structure of a new energy automobile and a manufacturing method of a 18650 battery of the lithium ion battery pack structure.
Background
The lithium ion battery is a kind of secondary battery, i.e. a rechargeable battery, and it mainly depends on the movement of lithium ions between the positive and negative electrodes to work, during the charging and discharging process, the lithium ions are inserted and extracted between the two electrodes, during the charging, the lithium ions are extracted from the positive electrode and inserted into the negative electrode through the electrolyte, the negative electrode is in a lithium-rich state, and the opposite is true during the discharging.
The lithium battery is divided into a lithium battery and a lithium ion battery, the lithium ion battery is used for mobile phones and notebook computers, the lithium ion battery comprises various types, 18650 is one of the types, 18650 battery generally adopts a material containing lithium element as an electrode, which is a representative of modern high-performance battery, and with the development of science and technology, 18650 battery used for new energy vehicles such as electric vehicles or hybrid vehicles is gradually developed, in the prior art, 18650 battery used for new energy vehicles such as electric vehicles or hybrid vehicles is generally used in a battery pack mode, and the battery packs have some defects in the actual use process, for example, the battery packs cannot be effectively adapted to the running state of the vehicles, namely, the battery packs composed of 18650 batteries are required to have good heat dissipation capability and self-protection effect.
Therefore, it is necessary to invent a new energy automobile lithium ion battery pack structure and a method for manufacturing 18650 battery to solve the above problems.
Disclosure of Invention
The invention aims to provide a lithium ion battery pack structure of a new energy automobile and a manufacturing method of a 18650 battery of the new energy automobile, which have good heat dissipation capacity and self-protection effect, can effectively deal with the heating phenomenon generated in the working process and prevent the new energy automobile from generating bumping action on the 18650 battery in the advancing process.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a new energy automobile lithium ion battery group structure, includes the casing, the casing outside is equipped with inlays the groove, it is equipped with heat transfer unit to inlay the nested inside heat transfer unit that is equipped with of groove, the casing includes bottom plate, shell body and interior casing, be equipped with first heat conduction chamber between shell body and the interior casing, it is equipped with first heat conduction hole to run through on the interior casing, the fixed a plurality of coupling mechanism that are equipped with on the interior casing inner wall, coupling mechanism end fixing is equipped with the installation casing, be equipped with the spacing groove on inside a plurality of battery chambeies and the inner wall of being equipped with of installation casing, be equipped with separation mechanism between the battery chamber.
Preferably, the outer shell and the inner shell are both fixedly arranged at the top of the bottom plate, and the inner shell is arranged on the inner side of the outer shell.
Preferably, the heat transfer unit is equipped with a plurality ofly, the heat transfer unit sets up to the refrigeration piece, the refrigeration piece includes heat-absorbing surface and cooling surface, the heat-absorbing surface with inlay the laminating of inslot inner wall.
Preferably, the connecting mechanism comprises a first connecting plate and a second connecting plate, the second connecting plate is arranged at the bottom of the first connecting plate, and a connecting spring is arranged between the first connecting plate and the second connecting plate.
Preferably, one end of the connecting spring is fixedly connected with the first connecting plate, and the other end of the connecting spring is fixedly connected with the second connecting plate.
Preferably, the first connecting plate is fixedly connected with the inner shell, and the second connecting plate is fixedly connected with the mounting shell.
Preferably, the separation mechanism comprises a separation plate, the separation plate is matched with the limiting groove, a second heat conduction hole penetrates through the side wall of the separation plate, a second heat conduction cavity is formed in the top of the side wall of the separation plate, the second heat conduction holes are multiple, and the second heat conduction holes are communicated with the second heat conduction cavity.
Preferably, the casing top is equipped with the top cap, top cap top both ends are run through and are equipped with the screw, the top cap passes through the screw and can dismantle with the casing and be connected, the bottom plate bottom is equipped with the buffer board, the buffer board is made by rubber.
Preferably, a 18650 battery is arranged in the battery cavity, a tooth-shaped groove is formed in the outer wall of the 18650 battery, the 18650 battery comprises a battery shell, a 18650 battery core and a protection circuit board, the 18650 battery core comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, the tooth-shaped groove is formed in the battery shell, the positive electrode, the negative electrode and the diaphragm are arranged in the battery shell, the diaphragm is arranged between the positive electrode and the negative electrode, and the electrolyte is filled between the positive electrode, the negative electrode and the diaphragm and the battery shell.
The invention also provides a manufacturing method of the new energy automobile 18650 battery based on the lithium ion battery pack structure, which specifically comprises the following steps:
the method comprises the following steps: firstly, adding a PVC material in a molten state into a forming die, integrally forming the battery shell and the toothed groove, cooling for three to five hours after pouring is finished, cooling the forming die and the battery shell, then dismounting the forming die, and taking out the battery shell;
step two: assembling the anode, the cathode and the diaphragm to enable the diaphragm to be positioned between the anode and the cathode, and then installing the assembled anode, cathode and diaphragm into the battery shell;
step three: adding electrolyte into the battery shell, so that the electrolyte completely fills gaps among the positive electrode, the negative electrode, the diaphragm and the battery shell;
step four: mounting a protection circuit board outside the battery shell, and electrically connecting the protection circuit board with a 18650 electric core;
step five: and (6) packaging.
The invention has the technical effects and advantages that:
1. when the 18650 battery in the battery cavity heats up in the working process, because the side wall of the baffle plate is provided with the second heat conduction hole and the top of the baffle plate is provided with the second heat conduction cavity, air in the second heat conduction cavity can be contacted with the surface of the 18650 battery through the second heat conduction hole so as to exchange heat with the 18650 battery and cool the 18650 battery, meanwhile, hot air in the second heat conduction cavity can overflow from the top of the second heat conduction cavity to the inside of the shell, heat dissipated by the 18650 battery through the outer wall of the mounting shell can also enter the shell and enters the first heat conduction cavity from the shell through the first heat conduction hole, the shell heats up under the action of the hot air in the first heat conduction cavity, then the heat absorption surface of the heat exchange unit absorbs the heat on the shell, so that the 18650 battery is cooled down in a multi-time heat exchange mode, and the invention has good heat dissipation effect, the blocking mechanism fixedly connected with the inner shell and the mounting shell can play a good role in buffering the mounting shell when bumping, and prevent the force generated by bumping from directly acting on the 18650 battery, thereby providing a good protection effect for the 18650 battery;
2. the second heat conduction cavity and the first heat conduction cavity can effectively reduce the overall weight of the blocking mechanism and the shell while playing roles, so that the overall weight of the heat-insulation device is reduced, and is convenient to mount, dismount and carry;
3. the 18650 battery has the advantage that the heat dissipation effect is better by arranging the tooth-shaped grooves on the surface of the battery shell so as to increase the surface area of the battery shell.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the internal structure of the mounting case of the present invention.
FIG. 3 is a schematic side view of the blocking plate according to the present invention.
Fig. 4 is a schematic structural diagram of the connecting mechanism of the present invention.
FIG. 5 is a schematic overall side view of the present invention.
Fig. 6 is a schematic diagram of a 18650 cell structure according to the invention.
In the figure: the heat exchanger comprises a machine shell 1, an embedded groove 2, a heat exchange unit 3, a bottom plate 4, an outer shell 5, an inner shell 6, a first heat conduction cavity 7, a first heat conduction hole 8, a connection mechanism 9, an installation shell 10, a battery cavity 11, a limit groove 12, a separation mechanism 13, a separation plate 14, a second heat conduction hole 15, a second heat conduction cavity 16, a first connection plate 17, a second connection plate 18, a connection spring 19, a top cover 20, a screw 21, a buffer plate 22, a 2318650 battery and a toothed groove 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a lithium ion battery pack structure of a new energy automobile as shown in figures 1-6, which comprises a casing 1, wherein an embedding groove 2 is arranged on the outer side of the casing 1, a heat exchange unit 3 is embedded in the embedding groove 2, the casing 1 comprises a bottom plate 4, an outer shell 5 and an inner shell 6, a first heat conduction cavity 7 is arranged between the outer shell 5 and the inner shell 6, a first heat conduction hole 8 is arranged on the inner shell 6 in a penetrating manner, a plurality of connecting mechanisms 9 are fixedly arranged on the inner wall of the inner shell 6, the end parts of the connecting mechanisms 9 are fixedly provided with an installation shell 10, a plurality of battery cavities 11 are arranged in the installation shell 10, a limiting groove 12 is arranged on the inner wall of the installation shell, and a blocking mechanism 13 is arranged between the battery cavities 11.
From the above embodiment, it can be seen that: when the 18650 battery 23 in the battery cavity 11 is heated in the working process, because the side wall of the barrier plate 14 is provided with the second heat conduction hole 15 and the top is provided with the second heat conduction cavity 16, the air in the second heat conduction cavity 16 can contact with the surface of the 18650 battery 23 through the second heat conduction hole 15, so as to exchange heat with the 18650 battery 23, so as to cool the 18650 battery 23, meanwhile, the hot air in the second heat conduction cavity 16 can overflow to the inside of the case 1 from the top of the second heat conduction cavity 16, the heat dissipated from the 18650 battery 23 through the outer wall of the mounting case 10 can also enter the case 1 and enter the first heat conduction cavity 7 from the case 1 through the first heat conduction hole 8, the case 5 is heated under the action of the hot air in the first heat conduction cavity 1867, and then the heat on the case 5 can be absorbed by the heat absorption surface of the heat exchange unit 3, so that the invention is cooled by the heat exchange for many times for the 50 battery 23, therefore, the invention has good heat dissipation effect, and the blocking mechanism 13 fixedly connected with the inner shell 6 and the mounting shell 10 can play a good role in buffering the mounting shell 10 when bumping, so as to prevent the force generated by bumping from directly acting on the 18650 battery 23, thereby providing good protection effect for the 18650 battery 23.
Example 2
Further, in the above embodiment 1, both the outer case 5 and the inner case 6 are fixed to the top of the bottom plate 4, and the inner case 6 is provided inside the outer case 5.
Further, in above-mentioned embodiment 1, heat exchange unit 3 is equipped with a plurality ofly, heat exchange unit 3 sets up to the refrigeration piece, the refrigeration piece includes heat-absorbing surface and radiating surface, the heat-absorbing surface is laminated with 2 inner walls of inlaying groove.
Further, in the above embodiment 1, the connection mechanism 9 includes the first connection plate 17 and the second connection plate 18, the second connection plate 18 is disposed at the bottom of the first connection plate 17, and the connection spring 19 is disposed between the first connection plate 17 and the second connection plate 18, so as to provide a good buffering effect for the mounting case 10, and prevent the force generated by the bumping from directly acting on the 18650 battery 23, thereby providing a good protection effect for the 18650 battery 23.
Further, in the above embodiment 1, one end of the connection spring 19 is fixedly connected to the first connection plate 17 and the other end thereof is fixedly connected to the second connection plate 18.
Further, in the above embodiment 1, the first connecting plate 17 is fixedly connected to the inner housing 6, and the second connecting plate 18 is fixedly connected to the mounting housing 10.
Further, in embodiment 1 above, the blocking mechanism 13 includes a blocking plate 14, the blocking plate 14 is matched with the limiting groove 12, a second heat conduction hole 15 is formed through a side wall of the blocking plate 14, and a second heat conduction cavity 16 is formed at a top of the blocking plate, the second heat conduction holes 15 are provided in plurality, and the second heat conduction holes 15 are all communicated with the second heat conduction cavity 16.
Further, in above embodiment 1, a top cover 20 is disposed on the top of the housing 1, screws 21 are disposed at two ends of the top cover 20 in a penetrating manner, the top cover 20 is detachably connected to the housing 1 through the screws 21, a buffer plate 22 is disposed at the bottom of the bottom plate 4, and the buffer plate 22 is made of rubber so as to have a certain shock absorption effect.
Further, in embodiment 1 above, a 18650 battery 23 is disposed inside the battery cavity 11, a toothed groove 24 is disposed on an outer wall of the 18650 battery 23, the 18650 battery 23 includes a battery case, a 18650 electric core and a protection circuit board, the 18650 electric core includes a positive electrode, a negative electrode, a diaphragm and an electrolyte, the toothed groove 24 is disposed on the battery case, the positive electrode, the negative electrode and the diaphragm are disposed inside the battery case, the diaphragm is disposed between the positive electrode and the negative electrode, and the electrolyte is filled between the positive electrode, the negative electrode and the diaphragm and the battery case.
Example 3
The invention also provides a manufacturing method of the new energy automobile 18650 battery based on the lithium ion battery pack structure, which specifically comprises the following steps:
the method comprises the following steps: firstly, adding a PVC material in a molten state into a forming die, integrally forming the battery shell and the tooth-shaped groove 24, cooling for three to five hours after pouring is finished, cooling the forming die and the battery shell, then detaching the forming die, and taking out the battery shell;
step two: assembling the anode, the cathode and the diaphragm to enable the diaphragm to be positioned between the anode and the cathode, and then installing the assembled anode, cathode and diaphragm into the battery shell;
step three: adding electrolyte into the battery shell, so that the electrolyte completely fills gaps among the positive electrode, the negative electrode, the diaphragm and the battery shell to form a 18650 electric core;
step four: mounting the protection circuit board outside the battery shell, and electrically connecting the protection circuit board with a 18650 electric core;
step five: and (6) packaging.
The working principle of the invention is as follows:
referring to the attached drawings 1, 2, 3 and 4 of the specification, 18650 batteries 23 supply power to the heat exchange unit 3 embedded in the slot 2, when the 18650 batteries 23 in the battery cavity 11 are heated during operation, air in the second heat conduction cavity 16 contacts with the surface of the 18650 batteries 23 through the second heat conduction hole 15 and the second heat conduction cavity 16 is arranged at the top of the baffle plate 14, so as to exchange heat with the 18650 batteries 23 and cool the 18650 batteries 23, meanwhile, hot air in the second heat conduction cavity 16 overflows from the top of the second heat conduction cavity 16 to the inside of the case 1, heat dissipated by the 18650 batteries 23 through the outer wall of the mounting case 10 also enters the case 1 and enters the first heat conduction cavity 7 through the first heat conduction hole 8 in the case 1, the outer case 5 is heated under the action of the hot air in the first heat conduction cavity 7, then, the heat absorbing surface of the heat exchange unit 3 absorbs heat on the outer shell 5, so that the 18650 battery 23 is cooled in a multi-heat exchange manner, the heat exchange unit has a good heat dissipation effect, and the blocking mechanism 13 fixedly connected with the inner shell 6 and the mounting shell 10 can play a good role in buffering the mounting shell 10 when the battery jolts, so that the force generated by jolt is prevented from directly acting on the 18650 battery 23, and a good protection effect is provided for the 18650 battery 23;
referring to the attached drawings 1 and 2 of the specification, the second heat conduction cavity 16 and the first heat conduction cavity 7 can effectively reduce the weight of the whole blocking mechanism 13 and the casing 1 while playing a role, so that the whole weight of the heat conduction device is reduced, and the heat conduction device is more convenient to mount, dismount and carry;
referring to the specification and the attached fig. 6, the surface of the battery shell is provided with the tooth-shaped grooves 24 so as to increase the surface area of the battery shell, so that the 18650 battery 23 has better heat dissipation effect.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a new energy automobile lithium ion battery group structure, includes casing (1), its characterized in that: the heat exchanger is characterized in that an embedding groove (2) is formed in the outer side of the casing (1), a heat exchange unit (3) is embedded in the embedding groove (2), the casing (1) comprises a bottom plate (4), an outer casing (5) and an inner casing (6), a first heat conduction cavity (7) is formed between the outer casing (5) and the inner casing (6), a first heat conduction hole (8) penetrates through the inner casing (6), a plurality of connecting mechanisms (9) are fixedly arranged on the inner wall of the inner casing (6), an installation casing (10) is fixedly arranged at the end part of each connecting mechanism (9), a plurality of battery cavities (11) are formed in the installation casing (10), limiting grooves (12) are formed in the inner wall of the installation casing (10), and a blocking mechanism (13) is arranged between the battery cavities (11);
the number of the heat exchange units (3) is multiple, the heat exchange units (3) are arranged to be refrigeration sheets, each refrigeration sheet comprises a heat absorption surface and a heat dissipation surface, and the heat absorption surfaces are attached to the inner walls of the embedding grooves (2);
the blocking mechanism (13) comprises a blocking plate (14), the blocking plate (14) is matched with the limiting groove (12), a plurality of second heat conducting holes (15) are arranged on the side wall of the blocking plate (14) in a penetrating mode, and a second heat conducting cavity (16) is arranged at the top of the blocking plate (14), wherein each second heat conducting hole (15) is communicated with the second heat conducting cavity (16), and hot air in the second heat conducting cavity (16) can overflow from the top of the second heat conducting cavity (16) and disperse into the shell (1);
a 18650 battery (23) is arranged in the battery cavity (11), a toothed groove (24) is formed in the outer wall of the 18650 battery (23), the 18650 battery (23) comprises a battery shell, a 18650 electric core and a protective circuit board, the 18650 electric core comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, the toothed groove (24) is formed in the battery shell, the positive electrode, the negative electrode and the diaphragm are arranged in the battery shell, the diaphragm is arranged between the positive electrode and the negative electrode, and the electrolyte is filled between the positive electrode, the negative electrode and the diaphragm and the battery shell;
the dentate groove (24) is used for increasing the surface area of the battery shell and enhancing the heat dissipation effect of the 18650 battery (23);
the preparation method of the 18650 battery (23) comprises the following steps:
the method comprises the following steps: firstly, adding a PVC material in a molten state into a forming die, integrally forming a battery shell and a toothed groove (24), cooling for three to five hours after pouring is finished, cooling the forming die and the battery shell, then detaching the forming die, and taking out the battery shell;
step two: assembling the positive electrode, the negative electrode and the separator so that the separator is positioned between the positive electrode and the negative electrode, and then installing the assembled positive electrode, negative electrode and separator inside the battery case;
step three: adding electrolyte into the battery shell, so that the electrolyte completely fills gaps among the positive electrode, the negative electrode, the separator and the battery shell to form the 18650 electric core;
step four: mounting a protection circuit board outside a battery shell, and electrically connecting the protection circuit board with the 18650 electric core;
step five: and (6) packaging.
2. The lithium ion battery pack structure of the new energy automobile according to claim 1, characterized in that: the outer shell (5) and the inner shell (6) are fixedly arranged at the top of the bottom plate (4), and the inner shell (6) is arranged on the inner side of the outer shell (5).
3. The lithium ion battery pack structure of the new energy automobile according to claim 1, characterized in that: the connecting mechanism (9) comprises a first connecting plate (17) and a second connecting plate (18), the second connecting plate (18) is arranged at the bottom of the first connecting plate (17), and a connecting spring (19) is arranged between the first connecting plate (17) and the second connecting plate (18).
4. The lithium ion battery pack structure of the new energy automobile according to claim 3, characterized in that: one end of the connecting spring (19) is fixedly connected with the first connecting plate (17) and the other end is fixedly connected with the second connecting plate (18).
5. The lithium ion battery pack structure of the new energy automobile according to claim 3, characterized in that: the first connecting plate (17) is fixedly connected with the inner shell (6), and the second connecting plate (18) is fixedly connected with the mounting shell (10).
6. The lithium ion battery pack structure of the new energy automobile according to claim 1, characterized in that: casing (1) top is equipped with top cap (20), top cap (20) top both ends are run through and are equipped with screw (21), top cap (20) can be dismantled with casing (1) through screw (21) and be connected, bottom plate (4) bottom is equipped with buffer board (22), buffer board (22) are made by rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811040184.9A CN109037787B (en) | 2018-09-07 | 2018-09-07 | New energy automobile lithium ion battery pack structure and 18650 battery manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN109860461A (en) * | 2019-01-22 | 2019-06-07 | 欣旺达电子股份有限公司 | The preparation method of battery case, battery and battery case |
| WO2022088006A1 (en) * | 2020-10-30 | 2022-05-05 | 张新华 | Battery installation and fixing structure for electric vehicle |
| CN112713310B (en) * | 2020-12-22 | 2024-07-09 | 惠州市竤泰科技有限公司 | Efficient lithium battery production process and lithium battery |
| CN113611965A (en) * | 2021-07-21 | 2021-11-05 | 东莞力朗电池科技有限公司 | Cylindrical lithium ion battery with protection mechanism |
| CN114188637A (en) * | 2022-01-10 | 2022-03-15 | 海口安驰博尔能源技术开发有限公司 | A single soft-pack lithium-ion battery forming structure |
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Effective date of registration: 20231127 Address after: 343400 Yongxin County Industrial Park, Ji'an City, Jiangxi Province Patentee after: Yongxin County Dajian Energy Co.,Ltd. Address before: 517000 south of Keqi Road, west of Binjiang Avenue, high tech Development Zone, Heyuan City, Guangdong Province Patentee before: GUANGDONG NEW LINGJIA NEW ENERGY INCORPORATED Co. |