CN209786141U

CN209786141U - Waterproof heat dissipation protection device for cylindrical lithium ion battery

Info

Publication number: CN209786141U
Application number: CN201920587995.4U
Authority: CN
Inventors: 李天辉; 侯建华; 郑金
Original assignee: Chongqing Tianhui Energy Technology Co Ltd
Current assignee: Chongqing Tianhui Energy Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2019-12-13
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a waterproof heat dissipation protection device for cylinder type lithium ion battery, lithium ion battery is located the inner chamber of shell, the inner wall of shell and lithium ion battery's outer wall laminating, and the outer wall of shell is provided with the annular fin that increases heat radiating area, the lower surface of shell is inlayed and is had the negative pole contact piece with lithium ion battery negative pole contact, the upper surface of shell has cup jointed the positive pole contact piece through the circular port to the positive pole department that corresponds lithium ion battery, the height that the positive pole contact piece protrudes the shell upper surface is greater than the distance between positive pole contact piece lower surface and the lithium ion battery positive pole, positive pole contact piece and negative pole contact piece are electrically conductive material, the shell is the heat conduction material, and the contact site of shell and positive pole contact piece and negative pole contact piece is; the heat that produces when the battery uses can give off fast, and when the battery was idle, with anodal contact piece and anodal separation, and the battery is in the shell inner chamber completely, and the battery possesses waterproof ability.

Description

waterproof heat dissipation protection device for cylindrical lithium ion battery

Technical Field

The utility model relates to a waterproof heat dissipation technical field of cylindrical lithium ion battery specifically is a waterproof heat dissipation protection device for cylinder type lithium ion battery.

background

A lithium ion battery is a generic term for a battery using a lithium ion intercalation compound as a positive electrode material, and is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. With the shortage of energy and the pressure in the world on environmental protection, lithium batteries are widely used in the electric vehicle industry, and lithium ion batteries are also mainly used in electronic products such as notebook computers, mobile phones, PDAs, camcorders, portable optical discs, etc., among which the notebook computers and mobile phones are the largest application products. 3C products such as electronics, information and communication are all moving towards wireless and portable development, and various high-performance components of the products are also moving towards the goals of being light, thin, short and small, and lithium ion batteries are the best power supply source. The cylindrical lithium ion battery has the largest market share due to the advantages of small size, compact structure, flexible use and the like.

However, the cylindrical lithium ion battery in the prior art has certain defects in the actual use process:

At present, generally used cylindrical lithium ion batteries are usually wrapped with plastic wrappers or metal wrappers on the outer surfaces of pole membranes and isolating membrane winding drums to protect internal battery parts, but the heat dissipation of the batteries is poor, so that heat generated in the use process of the batteries cannot be dissipated in time, and the service life of the batteries is easily shortened; and the battery does not have waterproof function, carelessly contacts the water body when the battery is idle, easily causes the damage of battery self.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a waterproof heat dissipation protection device for cylindrical lithium ion battery, including cylindrical lithium ion battery and convolute in the peripheral shell of lithium ion battery, lithium ion battery is located the inner chamber of shell, the inner wall of shell with lithium ion battery's outer wall laminating, and the outer wall of shell is provided with the annular fin that increases heat radiating area, the lower surface of shell is inlayed and is had the negative pole contact piece with lithium ion battery negative pole contact, the upper surface of shell corresponds the positive pole department of lithium ion battery has cup jointed the positive pole contact piece through the circular hole, the positive pole contact piece protrusion the height of shell upper surface is greater than the distance between positive pole contact piece lower surface and the lithium ion battery positive pole, positive pole contact piece and negative pole contact piece are electrically conductive material, the shell is heat conduction material, and the contact parts of the shell and the positive contact piece and the negative contact piece are made of insulating materials.

Preferably, the outer wall of the lithium ion battery is wrapped by an inner shell, an outer shell is sleeved on the periphery of the inner shell, a convex ring is arranged on the periphery of the inner shell, the convex ring penetrates through the outer wall of the outer shell, and the inner shell is made of copper.

Preferably, the center of the periphery of the convex ring is provided with a groove with a U-shaped section, the upper side wall and the lower side wall of the groove are provided with vent holes, the vent holes communicate the U-shaped groove with the cavity structure between the inner shell and the outer shell, the vent holes arranged on the upper side wall of the groove of the convex ring are close to one side of the outer shell, and the vent holes arranged on the lower side wall of the groove are close to one side of the inner shell.

Preferably, a supporting block is connected between the upper surface of the inner shell and the top of the inner cavity of the outer shell, an annular pressing plate is sleeved in an annular groove formed in the upper surface of the outer shell, a rod body is rotatably mounted on the side wall of the supporting block, one end of the rod body is rotatably connected with the lower surface of the annular pressing plate, and the other end of the rod body is rotatably connected with the outer edge of the lower surface of the positive contact piece.

Preferably, a spring is connected between the upper surface of one end of the rod body close to the annular pressure plate and the inner cavity of the shell.

Preferably, the distance between the lower surface of the annular pressure plate and the top surface of the inner cavity of the surrounding shell is greater than the distance between the lower surface of the anode contact piece and the anode of the lithium ion battery.

Preferably, the edge of the lower surface of the positive electrode contact piece is provided with a flange extending downwards, and the flange is sleeved on the periphery of the positive electrode of the lithium ion battery.

Compared with the prior art, the beneficial effects of the utility model are that:

The utility model relates to a cylindrical lithium ion battery protection device places lithium ion battery in the casing, and the casing is made by the material with better heat dissipation and provides bigger heat dissipation area, can in time diffuse away the heat that produces when the battery uses, improves the life of battery; when the battery is idle, the shell of the battery can be separated from the electrode relative to the electrode part of the battery, so that the battery has stronger waterproof capability.

Drawings

Fig. 1 is a schematic overall front view structure diagram of the present invention;

FIG. 2 is a schematic sectional view of the whole of the present invention;

Fig. 3 is a schematic view of the overall overhead structure of the present invention;

Fig. 4 is a schematic view of the overall structure of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 1 according to the present invention;

FIG. 6 is an enlarged schematic view of the structure of the present invention at B in FIG. 1;

Fig. 7 is an enlarged schematic view of the structure of fig. 2 at C according to the present invention.

In the figure: 100-a lithium ion battery; 200-a housing; 201-positive contact piece; 202-negative contact tab; 203-an annular platen; 204-support block; 205-a rod body; 206-a spring; 300-inner shell; 301-convex ring; 302-air vent.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a waterproof heat-dissipation protection device for a cylindrical lithium ion battery comprises a cylindrical lithium ion battery 100 and a shell 200 wound on the periphery of the lithium ion battery 100, wherein the lithium ion battery 100 is positioned in an inner cavity of the shell 200, the inner wall of the shell 200 is attached to the outer wall of the lithium ion battery 100, the outer wall of the shell 200 is provided with an annular fin for increasing the heat-dissipation area, a negative contact piece 202 in contact with the negative electrode of the lithium ion battery 100 is embedded on the lower surface of the shell 200, an anode contact piece 201 is sleeved on the upper surface of the shell 200 corresponding to the positive electrode of the lithium ion battery 100 through a circular hole, the height of the anode contact piece 201 protruding out of the upper surface of the shell 200 is larger than the distance between the lower surface of the anode contact piece 201 and the positive electrode of the lithium ion battery 100, the anode contact piece 201 and the negative contact piece 202 are made of conductive materials, the shell 200 is made, when the battery is used, the heat generated by the battery in use can be diffused out in time through the radiating fins on the shell 200, so that the service life of the battery is prolonged; when the battery is idle, the casing 200 is separated from the positive electrode relative to the positive electrode contact piece 201 of the positive electrode part, and the lithium ion battery 100 is completely positioned in the inner cavity of the casing 200, so that the battery has stronger waterproof capability.

the outer wall of the lithium ion battery 100 is wrapped by an inner shell 300, the outer shell 200 is sleeved on the periphery of the inner shell 300, a convex ring 301 is arranged on the periphery of the inner shell 300, the convex ring 301 penetrates through the outer wall of the outer shell 200, the inner shell 300 is made of copper, the convex ring 301 on the inner casing 300 can quickly dissipate the heat generated by the battery during operation into the air, a groove with a U-shaped section is arranged in the center of the periphery of the convex ring 301, and the upper and lower side walls of the groove are provided with vent holes 302, the vent holes 302 communicate the U-shaped groove with the cavity structure between the inner shell 300 and the outer shell 200, the vent holes 302 arranged on the upper side wall of the groove of the convex ring 301 are close to one side of the outer shell 200, and the ventilation holes 302 provided on the lower side wall of the groove are close to one side of the inner casing 300, the U-shaped groove increases the contact area for heat exchange, the outer wall of the inner casing 300 is communicated with the air through the vent holes 302, so that a heat dissipation channel is formed, and the heat dissipation efficiency is greatly improved.

A supporting block 204 is connected between the upper surface of the inner shell 300 and the top of the inner cavity of the outer shell 200, an annular pressing plate 203 is sleeved in an annular groove formed in the upper surface of the outer shell 200, a rod body 205 is rotatably installed on the side wall of the supporting block 204, one end of the rod body 205 is rotatably connected with the lower surface of the annular pressing plate 203, the other end of the rod body 205 is rotatably connected with the outer edge of the lower surface of the anode contact piece 201, the lower surface of the anode contact piece is contacted with the anode of the lithium ion battery 100 by pressing the anode contact piece 201 to meet the use requirement of the battery, when the battery is idle, the annular pressing plate 203 is pressed to separate the lower surface of the anode contact piece 201 from the anode, a spring 206 is connected between the upper surface of one end of the rod body 205 close to the annular pressing plate 203 and the inner cavity of the outer shell 200, the spring 206 enables the anode contact piece 201 to be kept in a separated state from the anode The distance between the positive pole, the edge of the lower surface of the positive pole contact piece 201 is provided with the flange that extends downwards, and the flange cup joints the periphery at the positive pole of the lithium ion battery 100, has increased the holistic leakproofness of shell 200, ensures that the positive pole contact piece 201 and the annular pressing plate 203 no matter what kind of state, and the homoenergetic guarantees that the shell 200 is in the encapsulated situation, and provides the guide effect for reciprocating of annular pressing plate 203 and positive pole contact piece 201.

The working principle is as follows: when the lithium ion battery 100 is idle, the annular pressing plate 203 is pressed, and the lower surface of the positive contact piece 201 is separated from the positive electrode through the lever action of the rod body 205; when the lithium ion battery 100 is used, the lower surface of the positive contact piece 201 is in contact with the positive electrode of the lithium ion battery 100 by pressing the lever action of the rod body 205, meanwhile, the annular pressing plate 203 protrudes out of the upper surface of the outer shell 200, and heat generated during the operation of the battery is quickly dissipated to the air through the heat dissipation channel communicated with the convex ring 301 and the vent hole 302 on the inner shell 300.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely for

To distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a waterproof heat dissipation protection device for cylinder type lithium ion battery, includes columniform lithium ion battery (100) and convolutes in lithium ion battery (100) outlying shell (200), its characterized in that: lithium ion battery (100) are located the inner chamber of shell (200), the inner wall of shell (200) with the outer wall laminating of lithium ion battery (100), and the outer wall of shell (200) is provided with the annular fin who increases heat radiating area, the lower surface of shell (200) inlay have with negative pole contact piece (202) of lithium ion battery (100) negative pole contact, the upper surface of shell (200) correspond to the anodal department of lithium ion battery (100) has cup jointed anodal contact piece (201) through the circular port, anodal contact piece (201) protrusion the height of shell (200) upper surface is greater than anodal contact piece (201) lower surface with distance between lithium ion battery (100) the positive pole, anodal contact piece (201) and negative pole contact piece (202) are electrically conductive material, shell (200) are the heat conduction material, and shell (200) with the contact site of anodal contact piece (201) and negative pole (202) is insulating material And (3) material quality.

2. The waterproof and heat-dissipation protection device for the cylindrical lithium ion battery as claimed in claim 1, wherein: the outer wall parcel of lithium ion battery (100) has inner shell (300), outer shell (200) has been cup jointed to the periphery of inner shell (300), the periphery of inner shell (300) is provided with bulge loop (301), bulge loop (301) run through the outer wall of outer shell (200), the material of inner shell (300) is copper.

3. The waterproof and heat-dissipation protection device for the cylindrical lithium ion battery as claimed in claim 2, wherein: the middle position of the periphery of the convex ring (301) is provided with a groove with a U-shaped section, the upper side wall and the lower side wall of the groove are provided with vent holes (302), the U-shaped groove and a cavity structure between the inner shell (300) and the outer shell (200) are communicated through the vent holes (302), the vent holes (302) formed in the upper side wall of the groove of the convex ring (301) are close to one side of the outer shell (200), and the vent holes (302) formed in the lower side wall of the groove are close to one side of the inner shell (300).

4. The waterproof and heat-dissipation protection device for the cylindrical lithium ion battery as claimed in claim 3, wherein: the upper surface of inner shell (300) with be connected with supporting shoe (204) between the top of shell (200) inner chamber, annular clamp plate (203) is equipped with to the ring channel endotheca that the upper surface of shell (200) was seted up, the body of rod (205) is installed in the lateral wall rotation of supporting shoe (204), the one end of the body of rod (205) with the lower surface rotation of annular clamp plate (203) is connected, and the other end of the body of rod (205) with the lower surface outer fringe rotation of anodal contact piece (201) is connected.

5. the waterproof and heat-dissipation protection device for the cylindrical lithium ion battery as claimed in claim 4, wherein: and a spring (206) is connected between the upper surface of one end of the rod body (205), which is close to the annular pressure plate (203), and the inner cavity of the shell (200).

6. the waterproof and heat-dissipation protection device for the cylindrical lithium ion battery as claimed in claim 5, wherein: the distance between the lower surface of the annular pressing plate (203) and the top surface of the inner cavity of the surrounding shell (200) is larger than the distance between the lower surface of the anode contact piece (201) and the anode of the lithium ion battery (100).

7. The waterproof and heat-dissipation protection device for the cylindrical lithium ion battery as claimed in claim 6, wherein: the edge of the lower surface of the positive electrode contact piece (201) is provided with a flange extending downwards, and the flange is sleeved on the periphery of the positive electrode of the lithium ion battery (100).