CN210349890U

CN210349890U - Water-cooled new forms of energy power battery aluminum hull

Info

Publication number: CN210349890U
Application number: CN201822075305.5U
Authority: CN
Inventors: 郭志星; 刘康
Original assignee: Jiangsu Changfeng Precision Technology Co ltd
Current assignee: Jiangsu Changfeng Precision Technology Co ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-04-17
Anticipated expiration: 2028-12-11

Abstract

The utility model relates to a water-cooled new forms of energy power battery aluminum hull, including inner shell, shell body and cooling barrel, the inner shell install in the shell body, the cooling barrel install in the outside of shell body, the inner shell constitute by inner box and the first end cover of installing in inner box upper end, the shell body also constitute by outer box and the second end cover of installing in outer box upper end, the cooling barrel constitute by first semicircular cylinder and second semicircular cylinder, the inner wall of first semicircular cylinder and second semicircular cylinder all seted up the recess with outer box assorted, outer box clamp fix between first semicircular cylinder and second semicircular cylinder; the design has the advantages of simple structure, easy manufacture, practicality and high efficiency.

Description

Water-cooled new forms of energy power battery aluminum hull

Technical Field

The utility model relates to the technical field of batteries, especially a water-cooled new forms of energy power battery aluminum hull.

Background

At present, the majority of domestic researches on heat transfer media adopt the traditional single air cooling mode, and foreign countries begin researches on new heat transfer media such as liquid cooling mode, phase change materials and the like.

The air cooling mode is low in price but poor in heat dissipation effect, and the liquid cooling mode is high in efficiency and is an important development direction of a power battery heat management system in the future; the common liquid cooling mode is that pipelines are scattered in the battery pack, so that the internal space is occupied, and most importantly, the leakage of the liquid cooling in the battery pack is a great safety hazard.

Meanwhile, the battery with the traditional winding structure has high production efficiency, small area of the corner of the pole piece and easy mass production and effective control of burr and powder removal of the edge of the pole piece; the traditional multi-roll continuous winding battery has high charge and discharge multiplying power and small heat production, and is suitable for being used under a low-temperature condition in a certain range; but the area of the corner of the pole piece is large, the production efficiency is relatively low, and the control of batch production and the control of burr and powder removal of the edge of the pole piece are not facilitated.

The conventional ultrasonic welding structure has disadvantages: the number of layers of the welded lugs is usually less than 100, and the instantaneously generated high temperature easily causes the contraction of the ceramic coating diaphragm paper at the lugs to form potential safety hazards; ultrasonic equipment is difficult to maintain, and a cold-solder product is difficult to detect, so that the consistency of the battery is influenced, and the subsequent battery assembly and assembly are not facilitated; the tab is easy to crack or generate metal dust, which affects the safety of the battery.

The conventional stud coupling structure has disadvantages in that: the size and material of the stud are limited by the process, the stud is influenced by the space of the battery shell, the diameter of the stud is limited, in order to improve the torsion, a stainless steel stud is usually adopted, and the stud and a connecting column of a cover plate of the shell are different in material to form a primary battery, so that the primary battery is easy to corrode points on site, and the reliability of the battery is influenced; the stud connection torsion is small, the influence of negative and negative pole piece tabs, the surface roughness of a shell cover plate connection column material and the like on contact resistance cannot be overcome, the contact surface resistance is unstable, the consistency of the battery is influenced, and the subsequent battery matching and assembling are not facilitated;

the process control of laser penetration welding is complex, the laser penetration welding is influenced by a plurality of factors such as environment, materials, processes and the like, the number of layers of the welding pole lug is generally controlled to be less than 10, and the welding effect is extremely unstable.

Lithium batteries have been increasingly and widely used in consumer, power, energy storage and various purpose batteries due to the advantages of high working voltage, large energy density, no memory effect, long cycle life, no pollution and the like, and gradually replace the traditional rechargeable batteries to become the main products in the battery field. Along with the market expansion, the demand on high-capacity and high-power lithium ion secondary batteries is increasing, and the markets such as mobile communication base stations of backup power supplies, peak shaving power supplies of wind and light power generation systems, vehicle-mounted lithium battery packs, emergency power supplies of cold-zone emergency rescue, power supplies of electric locomotives in cold-zone and the like have great demands. The battery has the advantages of large monomer capacity, high power density, good consistency and easy matching, the battery pack can still work normally under the discharge multiplying power of (1-10) C at the temperature of minus 30 ℃ to plus 60 ℃, and the conventional high-capacity lithium ion secondary battery with 100Ah or above has the defect of difficult surmounting. The main body is as follows:

1) in the ultrasonic welding battery, the dispersion of the internal resistances of the batteries welded by different machines and time is large, which is not beneficial to the matching of the battery pack;

2) the internal resistance of the stud-connected battery is large, and the stud-connected battery is usually only suitable for continuous discharge of current below 1C at normal temperature and cannot meet the high-power requirement required by equipment;

3) the internal resistance of the stud-connected battery is large, for example, 1KHz alternating current impedance of a 50Ah lithium ion secondary battery is usually more than 1m omega, and the discharge multiplier rate is poor;

4) the casing is generally in direct communication with the cathode, and after the cells are grouped, the insulating layer of the casing is broken, thereby causing the safety risk of short circuit between cells in the battery pack or chemical corrosion of the casing.

Disclosure of Invention

The utility model not only adopts the inner and outer double-layer water cooling mode to cool the battery component, but also arranges the radiating fins outside the cooling cylinder body, thereby greatly improving the cooling efficiency of the cooling cylinder body; a water-cooled new forms of energy power battery aluminum hull is provided.

In order to solve the technical problem, the structure of the utility model comprises an inner shell, an outer shell and a cooling cylinder, wherein the inner shell is arranged in the outer shell, the cooling cylinder is arranged outside the outer shell, the inner shell is composed of an inner box body and a first end cover arranged at the upper end of the inner box body, the outer shell is also composed of an outer box body and a second end cover arranged at the upper end of the outer box body, the cooling cylinder is composed of a first semicircular cylinder and a second semicircular cylinder, the inner walls of the first semicircular cylinder and the second semicircular cylinder are respectively provided with a groove matched with the outer box body, the outer box body is clamped and fixed between the first semicircular cylinder and the second semicircular cylinder, the two sides of the first semicircular cylinder are provided with first connecting seats, the two sides of the second semicircular cylinder are provided with second connecting seats, the first connecting seat is fixedly connected with the second connecting seat through a threaded component, a first water storage cavity and a liquid inlet and outlet hole are formed in the first semicircular cylinder body and the second semicircular cylinder body, the liquid inlet and outlet hole is communicated with the first water storage cavity, and a sealing end is installed at an outlet of the liquid inlet and outlet hole.

Further: the damping device is characterized in that first damping springs are arranged between the outer walls of the four sides of the inner box body and the inner walls of the four sides of the outer box body, and second damping springs are arranged between the bottom of the inner box body and the bottom surface of the outer box body.

And further: and a second water storage cavity and a water inlet and a water outlet are formed in the side wall of the inner box body, the water inlet and the water outlet are communicated with the second water storage cavity, and a sealing end cover is installed at an outlet of the water inlet and the water outlet.

And further: the outer wall of the outer box body is provided with a positioning seat, and the inner walls of the first semicircular cylinder body and the second semicircular cylinder body are provided with positioning grooves matched with the positioning seat.

And further: radiating fins are densely distributed on the outer walls of the first semicircular cylinder body and the second semicircular cylinder body.

After the structure is adopted, the utility model can detect the length, width and height of the product at one time by arranging the length mark on the bottom surface of the second layer of ladder and arranging the height mark and the width mark on the stop block, thereby playing the roles of increasing the practical performance and improving the working efficiency; and the design also has the advantages of simple structure, easy manufacture, practicality and high efficiency.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The water-cooled new energy power battery aluminum shell shown in figure 1 comprises an inner shell, an outer shell and a cooling cylinder, wherein the inner shell is arranged in the outer shell, the cooling cylinder is arranged outside the outer shell, the inner shell is composed of an inner box body 3 and a first end cover 4 arranged at the upper end of the inner box body 3, the outer shell is also composed of an outer box body 1 and a second end cover 2 arranged at the upper end of the outer box body 1, the cooling cylinder is composed of a first semicircular cylinder body 5 and a second semicircular cylinder body, grooves matched with the outer box body 1 are formed in the inner walls of the first semicircular cylinder body and the second semicircular cylinder body, the outer box body 1 is clamped and fixed between the first semicircular cylinder body and the second semicircular cylinder body, first connecting seats 7 are arranged on two sides of the first semicircular cylinder body 5, and second connecting seats are arranged on two sides of the second semicircular cylinder body, first connecting seat 7 pass through screw assembly and second connecting seat fixed connection, first semicircular cylinder 5 and second semicircular cylinder in all seted up first water storage cavity 6 and business turn over liquid hole 8, business turn over liquid hole 8 be linked together with first water storage cavity 6, the exit of business turn over liquid hole 8 install sealing end 9. During operation, inject cold water into first water storage cavity 6 earlier, accelerate the cooling of battery through the cold water in first water storage cavity 6, played the effect that improves its practicality.

As shown in fig. 1, first damper springs 14 are provided between the four outer walls of the inner casing 3 and the four inner walls of the outer casing 1, and second damper springs 13 are provided between the bottom of the inner casing 3 and the bottom of the outer casing 1. This design protects battery pack in the inner casing through first damping spring 14 and second damping spring 13, prevents that the vibration from causing the damage to its structure.

As shown in fig. 1, a second water storage cavity 11 and a water inlet and outlet 10 are formed in the side wall of the inner box 3, the water inlet and outlet 10 is communicated with the second water storage cavity 11, and a sealing end cover 15 is installed at an outlet of the water inlet and outlet 10. This design has still poured into cold water into in second water storage cavity 11, has adopted inside and outside double-deck water-cooling's mode to accelerate cooling efficiency.

As shown in fig. 1, a positioning seat 12 is disposed on an outer wall of the outer box 1, and positioning grooves matched with the positioning seat 12 are disposed on inner walls of the first semicircular cylinder and the second semicircular cylinder. This design has played the effect of being convenient for installation and dismantlement through adopting this structure.

As shown in figure 1, radiating fins are densely distributed on the outer walls of the first semicircular cylinder body and the second semicircular cylinder body, and the cooling is realized by adding blocks through the radiating fins, so that the cooling device has the advantages of simple structure, easiness in manufacturing, practicability and high efficiency.

Claims

1. The utility model provides a water-cooled new forms of energy power battery aluminum hull which characterized in that: comprises an inner shell, an outer shell and a cooling cylinder, wherein the inner shell is arranged in the outer shell, the cooling cylinder is arranged outside the outer shell, the inner shell comprises an inner box body (3) and a first end cover (4) arranged at the upper end of the inner box body (3), the outer shell also comprises an outer box body (1) and a second end cover (2) arranged at the upper end of the outer box body (1), the cooling cylinder comprises a first semicircular cylinder body (5) and a second semicircular cylinder body, grooves matched with the outer box body (1) are formed in the inner walls of the first semicircular cylinder body and the second semicircular cylinder body, the outer box body (1) is clamped and fixed between the first semicircular cylinder body and the second semicircular cylinder body, first connecting seats (7) are arranged at the two sides of the first semicircular cylinder body (5), second connecting seats are arranged at the two sides of the second semicircular cylinder body, first connecting seat (7) pass through screw assembly and second connecting seat fixed connection, first semicircular cylinder (5) and the semicircular cylinder of second in all seted up first water storage cavity (6) and business turn over liquid hole (8), business turn over liquid hole (8) be linked together with first water storage cavity (6), the exit of business turn over liquid hole (8) install sealing end (9).

2. The water-cooled new forms of energy power battery aluminum casing of claim 1, characterized in that: the damping device is characterized in that first damping springs (14) are arranged between the outer walls of the four sides of the inner box body (3) and the inner walls of the four sides of the outer box body (1), and second damping springs (13) are arranged between the bottom of the inner box body (3) and the bottom surface in the outer box body (1).

3. The water-cooled new forms of energy power battery aluminum casing of claim 1, characterized in that: the side wall of the inner box body (3) is internally provided with a second water storage cavity (11) and a water inlet and outlet (10), the water inlet and outlet (10) is communicated with the second water storage cavity (11), and a sealing end cover (15) is arranged at an outlet of the water inlet and outlet (10).

4. The water-cooled new forms of energy power battery aluminum casing of claim 1, characterized in that: the outer box is characterized in that a positioning seat (12) is arranged on the outer wall of the outer box body (1), and positioning grooves matched with the positioning seat (12) are formed in the inner walls of the first semicircular cylinder body and the second semicircular cylinder body.

5. The water-cooled new energy power battery aluminum shell according to any one of claims 1 or 4, characterized in that: radiating fins are densely distributed on the outer walls of the first semicircular cylinder body and the second semicircular cylinder body.