CN210325900U - High-heat-dissipation anti-self-explosion lithium battery - Google Patents

Abstract

The utility model relates to a high heat dissipation anti-self-explosion lithium battery, which comprises a shell, an end cover, a bottom cover and a charging and discharging assembly; the end cover and the bottom cover are respectively embedded and fixed in the two ends of the shell, and the charge and discharge assembly is arranged in the shell and between the end cover and the bottom cover; the second arc-shaped block and the two first arc-shaped blocks are arranged outside the shell, and the heat dissipation area is effectively increased by utilizing the outer arc surfaces of the second arc-shaped block and the two first arc-shaped blocks, so that the heat dissipation effect is improved; in addition, the wall thickness of the shell is increased due to the arrangement of the second arc-shaped block and the two first arc-shaped blocks, materials are saved due to the arrangement of the second arc-shaped cavity and the two first arc-shaped cavities, and the heat dissipation area is further enlarged to improve the heat dissipation effect.

Description

High-heat-dissipation anti-self-explosion lithium battery

Technical Field

The utility model relates to a high heat dissipation explosion-proof formula lithium cell.

Background

The lithium battery is a battery which takes lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, the lithium battery can generate heat in the charging and discharging processes, if the heat dissipation is poor, the inner shell expands due to overhigh temperature, and the outer shell further bulges outwards and even explodes; although the existing lithium battery adopts an aluminum shell to help heat dissipation, the heat dissipation area is limited; meanwhile, the outer wall is small in thickness and weak in strength, and is easily burst by the inner shell of the bulge, so that the safety performance is low, and further improvement is to be achieved.

SUMMERY OF THE UTILITY MODEL

To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that an effectively increased heat radiating area in order to improve the radiating effect, increased the intensity of shell simultaneously, improved the high heat dissipation explosion-proof formula lithium cell of security performance.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a high-heat-dissipation anti-self-explosion lithium battery comprises a shell, an end cover, a bottom cover and a charge and discharge assembly; the charging and discharging assembly is arranged in the outer shell and arranged between the end cover and the bottom cover, and comprises an inner shell, a diaphragm, an anode and a cathode; two symmetrical and transversely distributed second supporting plates are formed in the two first arch-shaped cavities, and a plurality of first heat dissipation ribs which are vertically distributed at equal intervals are formed outwards on the outer sides of the two first arch-shaped blocks; a second arc-shaped block is formed outside the outer part of the shell in the upward direction, a second arc-shaped cavity is formed in the second arc-shaped block, and a third supporting plate which is vertically distributed is formed in the middle of the inner part of the second arc-shaped cavity; two fourth supporting plates which are symmetrically and vertically distributed and two fifth supporting plates which are symmetrically and vertically distributed are further formed inside the second arch cavity, and a plurality of second heat dissipation ribs which are transversely distributed at equal intervals are formed outwards on the outer side above the second arch cavity.

Preferably, the two second supporting plates are respectively arranged at the upper side and the lower side of the first supporting plate.

Preferably, the two fourth supporting plates are respectively arranged at the left side and the right side of the third supporting plate, and the two fifth supporting plates are respectively arranged at the outer sides of the two fourth supporting plates.

Preferably, the outside below of the left and right sides of shell all outwards is formed with an extension board, two a plurality of breach grooves have all been seted up in the outside of extension board.

Compared with the prior art, the utility model has the advantages of: the second arc-shaped block and the two first arc-shaped blocks are arranged outside the shell, and the heat dissipation area is effectively increased by utilizing the outer arc surfaces of the second arc-shaped block and the two first arc-shaped blocks, so that the heat dissipation effect is improved; in addition, the wall thickness of the shell is increased due to the arrangement of the second arc-shaped block and the two first arc-shaped blocks, materials are saved due to the arrangement of the second arc-shaped chamber and the two first arc-shaped chambers, the heat dissipation area is further enlarged to improve the heat dissipation effect, the strength of the second arc-shaped chamber is guaranteed due to the arrangement of the third supporting plate, the two fourth supporting plates and the two fifth supporting plates in the second arc-shaped chamber, and the strength of the first arc-shaped chamber is guaranteed due to the arrangement of the first supporting plate and the two second supporting plates in each first arc-shaped chamber, so that the strength of the shell is increased, and the safety performance is improved.

Drawings

Fig. 1 is an exploded view of the present invention.

Detailed Description

As shown in fig. 1, a high heat dissipation explosion-proof lithium battery includes a case 1, an end cap 2, a bottom cap 7 and a charge and discharge assembly; the end cover 2 and the bottom cover 7 are respectively embedded and fixed in the two ends of the outer shell 1, the charge-discharge assembly is arranged in the outer shell 1 and between the end cover 2 and the bottom cover 7, and the charge-discharge assembly comprises an inner shell 3, a diaphragm 4, an anode 5 and a cathode 6; the inner shell 3 is filled with electrolyte, the diaphragm 4 is arranged in the inner shell 3, the anode 5 and the cathode 6 are both arranged at one end of the inner shell 3 and are respectively arranged at two sides of the diaphragm 4, when the battery discharges (namely the process of using the battery), lithium ions embedded in the cathode 6 are separated out, then are dissolved into the electrolyte, penetrate through the diaphragm 4 and then move back to the anode 5, and the more the lithium ions back to the anode, the higher the discharge capacity is; similarly, when the battery is charged, lithium ions are generated on the positive electrode 5 of the battery, the generated lithium ions are carried by the electrolyte and pass through the diaphragm 4 to move to the negative electrode 6, the surface of the negative electrode 6 is provided with a plurality of micropores, the lithium ions reaching the negative electrode are embedded into the micropores of the negative electrode 6, the more the embedded lithium ions are, the higher the charging capacity is, and the above principle is the prior art; and the utility model is characterized in that: the left side and the right side of the outer part of the shell 1 are both outwards provided with a first arc-shaped block 13, a first arc-shaped cavity 112 is respectively arranged in each of the two first arc-shaped blocks 13, and the middle parts of the inner parts of the two first arc-shaped cavities 112 are both provided with a first supporting plate 14 which is transversely distributed; two symmetrical and transversely distributed second supporting plates 15 are formed inside the two first arc-shaped cavities 112, the two second supporting plates 15 are respectively arranged on the upper side and the lower side of the first supporting plate 14, and a plurality of first heat dissipation ribs 16 which are vertically arranged at equal intervals are outwards formed on the outer sides of the two first arc-shaped blocks 13; a second arc-shaped block 17 is formed outwards on the outer side of the outer shell 1, a second arc-shaped cavity 113 is formed in the second arc-shaped block 17, and a third support plate 18 which is vertically distributed is formed in the middle of the inner part of the second arc-shaped cavity 113; second arch chamber 112's inside still forms two symmetries and vertical distribution's fourth backup pad 19 and two symmetries and vertical distribution's fifth backup pad 110, the left and right sides of third backup pad 18 is located respectively to two fourth backup pads 19, the outside of two fourth backup pads 19 is located respectively to two fifth backup pads 110, the outside second heat dissipation muscle 111 that is formed with a plurality of equidistant horizontal arrangements in the top outside in second arch chamber, shell 1's left and right sides outside below all outwards is formed with an extension board 11, a plurality of breach grooves 12 have all been seted up in two outsides of extension board 11, breach groove 12 is used for supplying the screw to pass in order to fix shell 1 in assigned position department.

When in use: fix terminal block 8 in the outside of end cover 2 to make anodal 5 and negative pole 6 be connected with the positive negative pole binding post in terminal block 8 respectively, can produce the heat after charge-discharge assembly work a period, the heat transmits to shell 1 through inner shell 3 on, the outside diffusion of a plurality of first heat dissipation muscle 16 of rethread and second heat dissipation muscle 111, thereby plays effectual radiating effect.

The lithium battery is a battery which takes lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, the lithium battery can generate heat in the charging and discharging processes, if the heat dissipation is poor, the inner shell 3 expands due to overhigh temperature, and the outer shell 1 further bulges outwards and even explodes; although the existing lithium battery adopts an aluminum shell to help heat dissipation, the heat dissipation area is limited; meanwhile, the outer wall is small in thickness and weak in strength, and is easily burst by the inner shell 3 of the bulge, so that the safety performance is low; the utility model arranges the second arc-shaped block 17 and the two first arc-shaped blocks 13 outside the shell 1, and effectively increases the heat dissipation area by utilizing the outside cambered surfaces of the second arc-shaped block 17 and the two first arc-shaped blocks 13, thereby improving the heat dissipation effect; in addition, the wall thickness of the housing 1 is increased by the arrangement of the second arc-shaped block 17 and the two first arc-shaped blocks 13, the arrangement of the second arc-shaped cavity 113 and the two first arc-shaped cavities 112 not only saves materials, but also further enlarges the heat dissipation area to improve the heat dissipation effect, the intensity of the second arc-shaped cavity 113 is ensured by the arrangement of the third support plate 18, the two fourth support plates 19 and the two fifth support plates 110 in the second arc-shaped cavity 113, and the intensity of the first arc-shaped cavity 112 is ensured by the arrangement of the first support plate 14 and the two second support plates 15 in each first arc-shaped cavity 112, so that the intensity of the housing 1 is increased, and the safety performance is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (4)

1. A high-heat-dissipation anti-self-explosion lithium battery comprises a shell, an end cover, a bottom cover and a charge and discharge assembly; the charging and discharging assembly is arranged in the outer shell and arranged between the end cover and the bottom cover, and comprises an inner shell, a diaphragm, an anode and a cathode; two symmetrical and transversely distributed second supporting plates are formed in the two first arch-shaped cavities, and a plurality of first heat dissipation ribs which are vertically distributed at equal intervals are formed outwards on the outer sides of the two first arch-shaped blocks; a second arc-shaped block is formed outside the outer part of the shell in the upward direction, a second arc-shaped cavity is formed in the second arc-shaped block, and a third supporting plate which is vertically distributed is formed in the middle of the inner part of the second arc-shaped cavity; two fourth supporting plates which are symmetrically and vertically distributed and two fifth supporting plates which are symmetrically and vertically distributed are further formed inside the second arch cavity, and a plurality of second heat dissipation ribs which are transversely distributed at equal intervals are formed outwards on the outer side above the second arch cavity.

2. The lithium battery as claimed in claim 1, wherein the two second support plates are disposed at upper and lower sides of the first support plate, respectively.

3. The lithium battery as claimed in claim 1, wherein the two fourth support plates are respectively disposed at left and right sides of the third support plate, and the two fifth support plates are respectively disposed at outer sides of the two fourth support plates.

4. The lithium battery as claimed in claim 1, wherein an extension plate is outwardly formed below the outer sides of the left and right sides of the case, and a plurality of notch grooves are formed on the outer sides of the two extension plates.

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