CN113054285B - Preparation method of lithium battery pack with collision protection and heat dissipation functions - Google Patents
Preparation method of lithium battery pack with collision protection and heat dissipation functions Download PDFInfo
- Publication number
- CN113054285B CN113054285B CN202110331658.0A CN202110331658A CN113054285B CN 113054285 B CN113054285 B CN 113054285B CN 202110331658 A CN202110331658 A CN 202110331658A CN 113054285 B CN113054285 B CN 113054285B
- Authority
- CN
- China
- Prior art keywords
- triangular prism
- lithium battery
- battery pack
- battery
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/6554—Rods or plates
-
- 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
- H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
-
- 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
Abstract
The invention discloses a preparation method of a high-power lithium battery pack with collision protection and good heat dissipation functions. The method comprises the following steps of (1) making a heat-conducting thin plate with round holes into hollow triangular prisms, and placing a lithium battery monomer in each triangular prism; electrically connecting the lithium battery monomers according to the circuit requirement; placing the triangular prism structure in a housing; leading out a lead from the upper part of the shell, slowly filling melted paraffin into gaps among the shell, the triangular prism and the battery monomer, vibrating the shell simultaneously, and synchronously vibrating the triangular prism structure and the lithium battery under the driving of the shell; filling paraffin into all gaps, and waiting for the paraffin to be cooled and solidified; the method has the advantages of good battery monomer consistency, long battery pack service life, large capacity, low cost, easy processing, simple structure, strong anti-collision capability of the battery pack, no air bubbles in the phase change material and the like.
Description
Technical Field
The invention belongs to the field of lithium batteries, and particularly relates to a preparation method of a high-power lithium battery pack with a triangular structure by using a phase-change material.
Background
The high-power lithium battery pack has important application in many fields, particularly the lithium battery pack used outdoors becomes an important part of an electric automobile, the performance of the battery pack directly relates to the whole automobile performance of the electric automobile, and the existing lithium battery pack still has certain defects.
The lithium battery pack comprises a plurality of lithium battery cells, wherein the lithium battery cells are electrically connected in a specific mode and are placed in a shell to form the lithium battery pack. The battery cells are generally cylindrical, square and the like, and 18650 cylindrical lithium battery cells, 433861 square lithium battery cells and 103450 square lithium battery cells are common, and in some cases, the battery cells are also called as battery cores.
When the battery pack discharges, each battery monomer in the battery pack generates heat, after the battery pack works for a period of time, the temperature of the battery monomer at the center of the battery pack is higher, the temperature of the battery monomer at the edge of the battery pack is lower, and due to the different discharge capacities of the battery monomers at different temperatures, the whole battery pack stops discharging when a part of the battery monomers (even one battery monomer) reach a discharge cut-off condition. Due to the temperature difference of each battery monomer in the battery pack, the overall discharge capacity of the battery pack is reduced, and the service life of the battery pack is exhausted after the discharge capacity of the whole battery pack is reduced to a certain degree. For a high-power battery pack, the discharge current of the battery monomer is large, the heat generation rate is large, the temperature difference between the battery monomers at the central position and the edge position is large, and the influence on the overall discharge capacity of the battery pack is large.
When working under the outdoor high temperature environment in summer, because battery monomer heat production is great, the group battery heat-sinking capability is not enough, and each battery monomer temperature is higher to still can arouse further danger along with group battery monomer temperature risees gradually, battery monomer can appear the spontaneous combustion phenomenon when the temperature risees to a definite value, arouses the burning of whole group battery.
In the prior art, various technologies are used to assist in heat dissipation in order to reduce the internal temperature of the battery pack and to reduce the temperature difference between the individual cells in the battery pack. The air cooling technology, the liquid cooling technology and the phase change cooling technology can reduce the temperature of the battery pack and reduce the temperature difference among the battery monomers in the battery pack. Air cooling and liquid cooling need to use structures such as air ducts, fans, pipelines, pumps and the like, the structure is complex, the heat dissipation capacity of the air cooling and liquid cooling technology is limited, although the temperature of a high-power battery pack can be reduced, and the temperature difference among battery monomers can be reduced, the temperature reduction range and the temperature difference among the battery monomers cannot meet the use requirement.
The phase change technology has good effect. In the chinese patent application with publication number CN112259830A entitled "a lithium battery capable of starting discharge at low temperature and method for making the same", polyvinylidene fluoride is used to coat a composite phase change material composed of dodecane and expanded graphite, and the composite phase change material is coated on an adhesive tape, and the adhesive tape is used to coat a battery core, and the composite phase change material undergoes phase change between-2 ℃ and-11 ℃ and releases heat.
The utility model is CN210866264U name "a phase change heat-retaining device for lithium cell thermal control" through setting up buffer board, phase change energy storage capsule and fan etc. radiating effect when having improved lithium cell charge-discharge still can not solve the great problem of each battery monomer difference in temperature in the group battery to adopt the fan to assist radiating mode can additionally increase the battery energy consumption, reduce group battery output energy, the cost is higher.
In the chinese patent application with publication number CN109768194A entitled "lithium ion battery module thermal management system based on phase change material-fin composite structure", a plurality of lithium iron phosphate square battery modules and heat dissipation structures arranged at intervals are fixed in an aluminum battery case, each heat dissipation structure is composed of a pair of substrates and a plurality of heat dissipation fins arranged between the pair of substrates in an aligned manner, and phase change material is filled between two adjacent heat dissipation fins, so that the temperature gradient of the battery pack is reduced.
In the Chinese patent application with the publication number of CN107146922A, namely 'a flame-retardant honeycomb-shaped adaptive temperature control module and a preparation method and application thereof', multilayer flaky graphene and long-chain alkane are used as main materials, a flame retardant and carbon fibers are added to prepare powder, then the powder is subjected to mould pressing processing to prepare a honeycomb-shaped adaptive temperature control module product, and the honeycomb-shaped adaptive temperature control module product is used in contact with the surface of a new energy power lithium battery, so that the problem of instantaneous heat sudden rise of the lithium battery pack is solved.
In the chinese patent application with publication number CN102181270A entitled "a device of composite phase change material for lithium battery heat dissipation", the device includes a top cover, a box body, and a partition board; the cavity with the corresponding number is separated according to the number of the battery monomers needing heat dissipation in the box body, the air flow channel is arranged between the adjacent partition plates, and the composite phase change material with the phase change temperature of 40-70 ℃ is filled in the cavity.
The existing battery pack easily causes the phenomena of battery deformation, short circuit, battery spontaneous combustion and the like in the collision process. The prior art uses a cushioning space, a shock absorbing assembly and an elastomeric material to reduce damage caused by collisions. Chinese patent publication No. CN112332016A entitled "a housing structure for packaging lithium batteries" discloses a method of using crash-proof cotton to keep the battery in a stable state during collision. Chinese patent publication No. CN112366418A entitled "a new energy automobile power battery structure" uses an elastic card and a buffer space to reduce collision damage. Chinese patent publication No. CN112310531A entitled "automotive lithium battery fixing device with shockproof function" uses a shock-absorbing assembly and a damper assembly to reduce the collision of lithium batteries. Even with these anti-collision technologies, the phenomenon of spontaneous combustion due to the collision of the automotive lithium battery still exists.
The existing high-power battery pack has the following defects: the temperature difference of battery monomers in the battery pack is still large in the high-power discharging process, so that the overall discharging capacity of the battery pack is reduced, and the service life of the battery pack is seriously shortened; the existing lithium battery pack heat dissipation technology has the defects that the manufacturing cost is high, the processing technology is complex, when the phase change material is used for reducing the temperature of a battery, bubbles, air passages and air gaps are mixed in the phase change material, the heat transfer is seriously influenced, and the temperature consistency of each battery monomer in the battery pack is poor, so that the performance consistency of each battery monomer is poor; the radiating demand of battery is not fully considered among the current battery anticollision technique, leads to there to conflict in anticollision technique and heat dissipation technique, can't satisfy the heat dissipation demand of battery simultaneously when designing crashproof structure. A new technology needs to be developed, which can meet the requirements of battery heat dissipation and battery anti-collision, and has the advantages of simple structure, low cost, and easy processing and manufacturing.
Disclosure of Invention
In order to solve the problems in the prior art, the invention discloses a preparation method of a lithium battery pack with collision protection and heat dissipation functions, which comprises a plurality of steps,
step A: punching a plurality of through holes on a thin plate made of a heat conduction material, and manufacturing the thin plate with a plurality of holes for later use;
and B: manufacturing a triangular prism by using a thin plate with a plurality of holes, wherein the side surface of the triangular prism is the thin plate with the plurality of holes, and the two bottom surfaces are triangles;
step C: each triangular prism is internally provided with a lithium battery monomer;
step D: electrically connecting all the lithium battery monomers according to the circuit requirement;
step E: fixing a triangular prism containing a lithium battery in a housing;
step F: leading out a lead wire for connecting the positive electrode and the negative electrode of the battery pack from the upper part of the shell;
step G: pouring the melted phase-change material into gaps among the shell, the triangular prism and the single battery, vibrating the shell at the same time, synchronously vibrating the triangular prism and the lithium battery under the driving of the shell, and waiting for the phase-change material to be cooled and solidified after all the gaps are filled with the phase-change material;
step H: an upper cover is installed above the housing, and the lead passes through the upper cover.
Preferably, the heat conduction material is steel, the thickness of the thin plate is 1 mm, the through hole is a circular hole with the diameter of 2 mm, and the distance between the centers of adjacent holes is 4 mm.
Preferably, the phase change material is paraffin, and the melting point of the paraffin is between 50 and 60 ℃.
Preferably, the amplitude of the vibration is 1 to 3 mm and the frequency is 5 to 10 Hz.
Preferably, the melted phase change material has a temperature 5 to 15 degrees celsius higher than the melting point when the phase change material is poured.
Preferably, two bottom surfaces of the triangular prism are regular triangles, and the side edges of the triangular prism are perpendicular to the bottom surfaces.
The application has the advantages that: this application can satisfy battery heat dissipation demand and can satisfy battery anticollision requirement again to simple structure, it is with low costs, easy processing and preparation.
The heat-conducting sheet is provided with holes, and when the heat-conducting sheet is impacted, the holes on the side surfaces of the prisms deform to absorb energy in the collision process; the phase-change material in the triangular prism can absorb energy in the collision process; the triangular prism also has better impact resistance, and the shape of the triangular prism is still unchanged when the triangular prism is impacted by larger external force; under the combined action of round holes in the phase-change material, the triangular prism and the thin plate, the single battery can be effectively protected, and the single battery cannot be damaged under strong impact.
The melted phase-change materials can flow through the holes, so that the heat dissipation capacity is improved, and bubbles in the phase-change materials are released; bubbles are further eliminated by vibration; the solidified phase-change material in the battery pack is free of air bubbles, air passages and air gaps, and has good heat dissipation capability; the heat conducting thin plate is used for rapidly conducting the heat in the center of the battery pack to the edge position; the temperature difference between each battery monomer in the battery pack is small, the consistency between each battery monomer is good, the discharge capacity of the battery pack is high, and the service life of the battery pack is long.
Drawings
FIG. 1 is a sheet having a plurality of apertures according to an embodiment of the present invention.
Fig. 2 is a triangular prism in an embodiment of the present invention.
Fig. 3 is a plurality of triangular prisms on which lithium battery cells are placed in an embodiment of the present invention.
Fig. 4 shows a housing, a triangular prism, and a battery cell in an embodiment of the present invention.
Fig. 5 shows the housing and the upper cover in the embodiment of the invention.
In the figure: 1. a sheet having a plurality of holes; 11. round holes on the thin plate; 2. a triangular prism; 3. a lithium battery cell; 4. a housing; 41. a fixed plate on the housing; 51. the lead is connected with the anode and the cathode of the battery pack; 52. connecting wires between single electrodes of the lithium battery; 6. an upper cover; 61. and a screw connecting the upper cover and the housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A preparation method of a lithium battery pack with collision protection and heat dissipation functions comprises a plurality of steps including step A, step B, step C, … … and step G.
In step a: punching a plurality of holes on a thin plate made of a heat conduction material to manufacture a thin plate with a plurality of holes for later use; in fig. 1, the heat conductive material is steel, the thickness of the thin plate is 1 mm, the diameter of the through hole on the thin plate is 2 mm, the distance between the centers of two adjacent holes is 4 mm, and thin plates with two lengths are manufactured for standby.
And B, step B: manufacturing a triangular prism by using a thin plate with a plurality of holes, wherein the side surface of the triangular prism is the thin plate with the plurality of holes, two bottom surfaces in the embodiment are regular triangles, and the side edge of the triangular prism is vertical to the bottom surfaces; in fig. 2 and 3, since 18650 lithium batteries are used as the cells, the diameter of the battery cell is 18 mm, the height of the cell is 65 mm, the side length of the regular triangle is 36 mm, the diameter of the inscribed circle of the regular triangle is more than 18 mm, and a plurality of regular triangular prisms are spaced apart by a thin plate having a plurality of holes. For simplification, only a few triangular prisms are drawn in fig. 3, the upper bottom surface and the lower bottom surface of each triangular prism are regular triangles, the cross section of the single battery is circular, and the cross section of the single battery in the drawing is drawn into an oval due to the projection in the drawing; the holes in the sheet are not shown in fig. 2 and 3, since they are too small and are more numerous.
And C: each triangular prism is internally provided with a lithium battery monomer; referring to fig. 3, the diameter of the inscribed circle of the triangle is greater than that of the unit cell in the embodiment, so that the battery unit cell can be easily put in without damaging the lithium battery unit cell inside even if some deformation of the triangular prism occurs.
Step D: electrically connecting all the lithium battery monomers according to the circuit requirement; in the embodiment, every two battery cells are connected in parallel and then connected in series, and referring to fig. 4, the electrodes of two adjacent lithium battery cells are electrically connected by a lead.
Step E: fixing triangular prisms containing lithium batteries in a shell, wherein the side edges of each triangular prism are in the vertical direction, and the upper bottom surfaces of the triangular prisms are open; referring to fig. 4 and 5, the triangular prism and the lithium battery cell are placed in a housing and fixed with the housing, the housing is made of steel, the upper bottom surface of the triangular prism is open, and the lower bottom surface and the periphery of the triangular prism are caught by the housing.
Step F: leading out a lead wire for connecting the anode and the cathode of the battery pack from the upper part of the shell; in the embodiment, the positive and negative leads of the battery pack are respectively led out from the upper left and the upper right of the casing, and the leads for connecting the positive and negative poles of the battery pack are respectively led out from the upper two sides of the casing and are marked in fig. 4.
G: the shell is vibrated simultaneously, the triangular prism and the lithium battery vibrate synchronously under the driving of the shell, and after all the gaps are filled with the phase-change materials, the phase-change materials are waited to be cooled and solidified. In the embodiment, the phase-change material is paraffin, the paraffin is poured from the upper bottom surface of the triangular prism, the lower surface and the periphery of the triangular prism are held by the shell, and the paraffin fills the gap in the shell. The paraffin is commonly used as a phase change energy storage material, No. 52 to No. 58, the embodiment adopts No. 52 fully refined oil-free paraffin, the melting point is 52 ℃, the paraffin melted at 60 ℃ is injected into the shell in which the battery monomer and the triangular prism are arranged at the speed of 5 ml/s, the whole operation is carried out on a vibration test bench, the vibration frequency is set to be 8Hz, and the vibration amplitude is set to be 1 mm.
Step H: an upper cover is arranged above the shell, and positive and negative leads of the battery pack penetrate through the upper cover. In the embodiment of fig. 4 and 5, the fixing plate is arranged on the outer shell, the fixing plate is provided with a hole, the outer shell and the upper cover are connected by using screws, and in order to prevent short circuit, the embodiment also uses an insulating material to prevent the lead and the electrode of the battery cell from contacting with the upper cover.
A lithium battery pack with collision protection and heat dissipation functions is manufactured through the steps A to H. When the battery pack continuously works at high power, the battery can emit a large amount of heat, the temperature of the battery and the phase-change material can continuously rise, when the melting point of the phase-change material is reached, a temperature platform can be provided due to phase change, the temperature of all battery monomers in the battery pack can be stabilized near the temperature platform, the temperature of the battery monomers is prevented from being too high, and various abnormal battery states caused by high temperature are eliminated.
The phase change material that begins to melt also reduces the temperature difference between the cells, and although the battery continues to emit heat, this heat is used to melt the phase change material, and the temperature of each cell is near the melting point of the phase change material. In the embodiment, enough phase-change materials are adopted, the discharge is continuously carried out at the maximum current at the highest external environment temperature, and the phase-change materials are completely melted when the electric quantity of the battery is completely discharged; the phase change material does not melt completely in most cases of practical operation.
The heat conducting thin plate has high heat conducting capacity, so that heat at the central position is conducted to the edge position; the melted phase-change material flows through the through holes of the heat-conducting thin plate, and heat at the center of the battery pack is transferred to the edge of the battery pack, so that temperature difference among battery monomers in the battery pack is reduced.
When receiving the striking, round hole and heat conduction sheet metal take place deformation and can absorb the impact energy, and phase change material also can share the energy of striking process, and the triangular prism structure has higher mechanical strength and anti ability of colliding, has guaranteed that battery monomer is difficult to damage, has higher anti ability of colliding on the whole. The battery pack manufactured by the method has no obvious damage to the battery cells in a severe automobile crash test. When the heat-conducting thin plate deforms in a certain range, the heat-conducting thin plate automatically restores to the original state after collision.
In the embodiment, by adopting the method, the heat dissipation requirement of the battery pack and the anti-collision requirement of the battery can be met, and the battery anti-collision device is simple in structure, low in cost and easy to process and manufacture.
In another embodiment, the heat conducting material is aluminum alloy, the through holes on the thin plate are triangular holes, the side length of each triangle is 3 mm, and the distance between the centers of the adjacent through holes is 6 mm; the adopted square lithium battery has the model of 433861, the length of 43 mm, the width of 38 mm and the height of 61 mm; manufacturing regular triangular prisms by using a thin plate with through holes, wherein the height of each triangular prism is 61 mm, the side length of each regular triangle on two bottom surfaces of each triangular prism is 95 mm, and a plurality of regular triangular prisms are separated by using a heat-conducting thin plate; placing a lithium battery monomer in each triangular prism, and electrically connecting the battery monomers according to circuit requirements; placing the triangular prism containing the lithium battery monomer into a heat-conducting shell for fixing, and leading out a lead from the upper part of the shell; adopting No. 58 paraffin wax, melting at 70 ℃, and then pouring the molten paraffin wax into a shell provided with triangular prisms and lithium battery monomers at a speed of 12 ml/s; the irrigation process is carried out on a vibration test bed, the vibration amplitude is 2 mm, the vibration frequency is 9Hz, an upper cover is installed above the shell after paraffin is solidified and shaped, and the lead penetrates through the upper cover, so that the lithium battery pack with collision protection and heat dissipation functions is manufactured.
In other embodiments, other sizes of cells are used, and the triangular prism is sized according to the size of the cells.
In a plurality of embodiments, a plurality of materials are respectively adopted, including an aluminum plate, an iron plate, a copper plate and a graphite plate, the aluminum alloy material has a good heat conduction effect, the weight of the stainless steel material is obviously higher than that of the aluminum alloy material, but the stainless steel material is easier to weld when a triangular prism structure is manufactured, and the strength of the graphite plate is too low. The preferred steel that uses as the heat conduction material, crashworthiness is stronger, and processing is convenient, and the heat dissipation is better, and the temperature difference between each battery monomer is less, has compromise factors such as crashworthiness, heat dissipation, processing.
In a plurality of embodiments, triangular, rectangular, regular hexagonal and circular through holes are respectively adopted on the thin plates, the resistance of the holes is different when paraffin flows through the holes, the mechanical properties of the thin plates punched with the holes are different, and the heat conduction capability of the thin plates punched with the holes is different. When the circular hole and the regular hexagonal hole are used, the molten paraffin can easily flow through the through hole, the heat conducting capacity of the steel plate using the two holes is better, and the integral heat dissipation capacity is better; when triangular holes or rectangular holes are used, bubbles are easy to remain at the edges of the holes when paraffin is poured; the sheet is more impact resistant when round holes are used. The round hole is optimized, the whole heat conduction capability is strong, the processing is easy, almost no bubbles exist in the phase change material, and the whole anti-collision capability is strong.
When the diameter of the circular through hole is 2 millimeters, the distance between the centers of adjacent holes is 4 millimeters, the thickness of the steel plate is 1 millimeter, paraffin flowing, heat conducting performance and mechanical strength can be considered, and the requirements of battery heat dissipation and battery anti-collision can be better met. Preferably, a steel plate with the thickness of 1 mm is used, the diameter of the circular through hole is 2 mm, and the distance between the centers of adjacent holes is 4 mm.
The phase-change material comprises an organic phase-change material and an inorganic phase-change material, common phase-change materials comprise water, benzene, ethanol, methylbenzene, normal hexane and paraffin, the upper limit of the working environment temperature of most lithium batteries is generally not more than 70 ℃, and as long as the melting point of the phase-change material is close to but not more than the maximum environment temperature of the lithium batteries during working, the phase-change materials can be used in the lithium battery pack to control the temperature of a battery monomer. Paraffin is the most common phase-change material with low price and large phase-change energy storage, can be produced in batches, has stable performance, and is non-toxic and harmless. The melting points of paraffin wax with different grades are gradually increased from 52 to 58, the grade of the paraffin wax is the melting point of the paraffin wax, and the melting point of the 52 paraffin wax is 52 ℃. Preferably, the phase change material is paraffin, and the melting point of the paraffin is 50-60 ℃.
When the paraffin is poured, the vibration amplitude is too large or the frequency is too high, so that the pouring operation is not facilitated, and the paraffin can be splashed out, but the vibration amplitude is too small or the frequency is too low, so that the bubbles generated in the material pouring process are not removed, and the vibration amplitude is preferably 1 to 3 millimeters, the frequency is preferably 5 to 10Hz, so that the bubbles in the paraffin can be effectively removed, and the operation is convenient.
When pouring into phase change material, the phase change material temperature that melts is 5 to 15 degrees centigrade higher than the melting point, and the effect is better, if the temperature is too low, phase change material's mobility is relatively poor, and partial phase change material can solidify in the filling process, also mix with the bubble easily, and the temperature can exceed the maximum ambient temperature of battery too high.
Various triangular prisms can meet the requirements, but the two bottom surfaces of each triangular prism are regular triangles, and the side edges of each triangular prism are perpendicular to the bottom surface, so that the size of a battery which can be accommodated in each triangular prism is larger, the anti-collision capacity is stronger, preferably, the two bottom surfaces of each triangular prism are regular triangles, and the side edges of each triangular prism are perpendicular to the bottom surface.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present patent is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and these embodiments are still within the scope of the invention.
Claims (3)
1. A preparation method of a lithium battery pack with collision protection and heat dissipation functions is characterized by comprising the following steps: comprises a plurality of steps which are carried out,
step A: punching a plurality of through holes on a thin plate made of a heat conduction material, and manufacturing the thin plate with a plurality of holes for later use;
and B, step B: manufacturing a triangular prism by using a thin plate with a plurality of holes, wherein the side surface of the triangular prism is the thin plate with the plurality of holes, and the two bottom surfaces are triangles;
and C: each triangular prism is internally provided with a lithium battery monomer;
step D: electrically connecting all the lithium battery monomers according to the circuit requirement;
and E, step E: fixing a triangular prism containing a lithium battery in a housing;
step F: leading out a lead wire for connecting the anode and the cathode of the battery pack from the upper part of the shell;
step G: pouring the melted phase-change material into gaps among the shell, the triangular prism and the single battery, vibrating the shell at the same time, synchronously vibrating the triangular prism and the lithium battery under the driving of the shell, and waiting for the phase-change material to be cooled and solidified after all the gaps are filled with the phase-change material;
step H: an upper cover is arranged above the shell, and a lead passes through the upper cover;
the phase-change material is paraffin, and the melting point of the paraffin is between 50 and 60 ℃;
when the phase-change material is poured, the temperature of the melted phase-change material is 5 to 15 ℃ higher than the melting point;
the amplitude of the vibration is 1 to 3 mm and the frequency is 5 to 10 Hz.
2. The method for preparing a lithium battery pack with collision protection and heat dissipation functions as claimed in claim 1, wherein the method comprises the following steps: the heat conduction material is steel, the thickness of the thin plate is 1 mm, the through hole is a circular hole with the diameter of 2 mm, and the distance between the centers of adjacent holes is 4 mm.
3. The method for preparing a lithium battery pack with collision protection and heat dissipation functions as claimed in claim 1, wherein the method comprises the following steps: two bottom surfaces of the triangular prism are regular triangles, and the side edges of the triangular prism are perpendicular to the bottom surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331658.0A CN113054285B (en) | 2021-03-29 | 2021-03-29 | Preparation method of lithium battery pack with collision protection and heat dissipation functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331658.0A CN113054285B (en) | 2021-03-29 | 2021-03-29 | Preparation method of lithium battery pack with collision protection and heat dissipation functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113054285A CN113054285A (en) | 2021-06-29 |
| CN113054285B true CN113054285B (en) | 2022-08-23 |
Family
ID=76516304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110331658.0A Active CN113054285B (en) | 2021-03-29 | 2021-03-29 | Preparation method of lithium battery pack with collision protection and heat dissipation functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113054285B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955081B (en) * | 2021-09-24 | 2023-11-28 | 中国航空工业集团公司西安飞机设计研究所 | Aircraft battery cabin structure |
| CN114204191B (en) * | 2021-12-04 | 2023-07-25 | 深圳市鸿昊升电子有限公司 | Electric power storage lithium battery with anti-collision and good heat dissipation performance |
| CN114628815A (en) * | 2022-03-22 | 2022-06-14 | 国网黑龙江省电力有限公司电力科学研究院 | Phase-change temperature adaptive shell for outdoor battery in low-temperature area |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006261009A (en) * | 2005-03-18 | 2006-09-28 | Toshiba Corp | Battery pack |
| CN101635382A (en) * | 2009-08-28 | 2010-01-27 | 南京双登科技发展研究院有限公司 | Heat-dissipating method of power lithium battery |
| CN102181270A (en) * | 2011-04-28 | 2011-09-14 | 华南理工大学 | Composite phase change material for heat dissipation of lithium battery and device |
| CN105492566B (en) * | 2013-08-29 | 2018-04-17 | 得克萨斯系统大学董事会 | Thermal storage unit, its composition and its preparation and application |
| KR20150093952A (en) * | 2014-02-10 | 2015-08-19 | 영남대학교 산학협력단 | Case of angular lithium ion secondary battery |
| US9614263B2 (en) * | 2014-02-14 | 2017-04-04 | Intramicron, Inc. | Thermal management systems for energy storage cells having high charge/discharge currents and methods of making and using thereof |
| US10396416B2 (en) * | 2014-05-21 | 2019-08-27 | Thermal Ceramics, Inc. | Passive insulation materials |
| CN207977427U (en) * | 2018-03-02 | 2018-10-16 | 北京车和家信息技术有限公司 | Radiator, radiating subassembly, power battery device and vehicle |
| WO2020197982A1 (en) * | 2019-03-22 | 2020-10-01 | Razack Siddique Khateeb | Thermal management system and device |
| CN210040308U (en) * | 2019-06-19 | 2020-02-07 | 安徽沃博源科技有限公司 | Battery pack |
| CN210516843U (en) * | 2019-11-22 | 2020-05-12 | 无锡南洋职业技术学院 | Battery module structure assembly of electric automobile |
-
2021
- 2021-03-29 CN CN202110331658.0A patent/CN113054285B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 新型三维脉动热管的性能;王亚雄等;《化工进展》;20160805(第08期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113054285A (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113054285B (en) | Preparation method of lithium battery pack with collision protection and heat dissipation functions | |
| CN103325964A (en) | Air cooled electric automobile battery thermal-management device containing phase change material | |
| CN204271214U (en) | There is the dynamic lithium battery group of intelligent temperature regulatory function | |
| CN216872114U (en) | Battery and electric equipment | |
| CN110071348A (en) | Based on the cooling power battery thermal management system of composite phase-change material and its application | |
| CN216872113U (en) | Battery and electric equipment | |
| JP2012174496A (en) | Battery module | |
| CN110137626A (en) | A kind of battery heat removal system and vehicle | |
| CN211125754U (en) | Battery pack heat conduction device and battery pack | |
| Khan et al. | Advancements in Battery Thermal Management System for Fast Charging/Discharging Applications | |
| CN108183281A (en) | The lithium ion battery of radiator structure is set in a kind of | |
| WO2023185244A1 (en) | Heat dissipation structure, high voltage box, battery, and electrical device | |
| CN219321458U (en) | Heat exchange plate and battery device | |
| CN112086705A (en) | Power battery heat dissipation method based on ionic liquid phase change material and liquid cooling | |
| CN214797542U (en) | Box structure of 48V start-stop battery | |
| CN213782117U (en) | Lithium battery heat dissipation device | |
| CN211789143U (en) | Lithium battery pack | |
| CN210074095U (en) | Battery cooling system and vehicle | |
| CN210129528U (en) | A graphite alkene battery for unmanned aerial vehicle | |
| CN201985215U (en) | Rectangular lithium-ion power battery using wound battery core | |
| JP2003197278A (en) | Storage battery | |
| CN218241960U (en) | Vehicle-mounted lithium ion battery with flame retardant function | |
| WO2024077625A1 (en) | Battery and electrical device | |
| CN218568972U (en) | Small-size lithium cell integrated configuration | |
| CN111969279B (en) | Power battery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |