CN211184790U

CN211184790U - Electric bicycle lithium cell heat radiation structure

Info

Publication number: CN211184790U
Application number: CN202020122961.0U
Authority: CN
Inventors: 刘卫朋; 丁希罕; 邵先辉; 张剑; 金明钢
Original assignee: Hangzhou Skyrich Power Co ltd
Current assignee: Hangzhou Skyrich Power Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-08-04
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses an electric bicycle lithium cell heat radiation structure belongs to electric bicycle technical field, and aim at overcomes the poor defect of current electric bicycle lithium cell radiating effect. The heat dissipation structure comprises an upper cover and a BMS (battery management system) fixed on the upper cover, wherein a heat dissipation port is formed in the upper cover, a heat dissipation sheet is arranged at the position of the heat dissipation port, and the heat dissipation sheet is in contact connection with the BMS through a heat conduction medium. The utility model provides an electric bicycle lithium cell heat radiation structure, BMS in the battery can dispel the heat rapidly through the fin among the heat radiation structure, improves the radiating effect, improves the ability of overflowing of battery, reduces the fault rate that the battery produced because of BMS generates heat.

Description

Electric bicycle lithium cell heat radiation structure

Technical Field

The utility model belongs to the technical field of electric bicycle, a electric bicycle lithium cell heat radiation structure is related to.

Background

The internal structure of the lithium battery shell of the two-wheeled electric bicycle mainly comprises a battery module, a BMS and a connecting wire harness. At present, a battery module and a BMS (battery management system) are generally fixed in a plastic shell, the heat conducting performance of the plastic shell is poor, and when a battery discharges with large current, MOS (metal oxide semiconductor) tubes and other elements on the BMS can generate heat. If the heat cannot be dissipated in time, BMS temperature protection may be caused, affecting customer experience. Long-term heat accumulation can also cause BMS failures and local high temperatures of battery modules, affecting battery performance.

Disclosure of Invention

The utility model discloses the problem to prior art existence provides an electric bicycle lithium cell heat radiation structure, and aim at overcomes the poor defect of current electric bicycle lithium cell radiating effect.

The utility model discloses a realize like this:

the utility model provides an electric bicycle lithium cell heat radiation structure, includes the upper cover and fixes the BMS on the upper cover, its characterized in that, the upper cover is last to have the thermovent, thermovent department sets up the fin, the fin with BMS passes through the heat-conducting medium contact and connects. BMS in the battery can dispel the heat rapidly through the fin among the heat radiation structure, improves the radiating effect, improves the ability of overflowing of battery, reduces the fault rate that the battery produced because of BMS generates heat.

Preferably, the surface of the upper cover is recessed inwards to form a mounting table, and the outer contour of the radiating fin is matched with the shape of the mounting table and is fixed on the mounting table. The mounting table can limit the radiating fins, and the radiating fins can be mounted accurately and quickly.

Preferably, the inner side edge of the mounting table is enclosed to form the heat dissipation opening, a fixing column is arranged below the heat dissipation opening, and the BMS is fixed on the fixing column.

Preferably, the BMS has a smaller outer shape than the heat dissipation port. BMS is got from the thermovent and is put like this.

Preferably, the corner of the heat sink has a convex protrusion, the corner of the heat sink has a first fixing hole, the corner of the mounting base and the corner of the heat sink match each other and have a second fixing hole, and the heat sink is fixed to the upper cover by a screw passing through the first fixing hole and the second fixing hole. This can improve the contact surface between the heat sink and the mount at the corner, and provide a fixing hole for fixing the heat sink and the mount.

Preferably, the heat sink is an aluminum plate. The aluminum plate is a good thermal conductor, and is convenient for rapid heat dissipation.

Preferably, the heat-conducting medium is heat-conducting silicone grease. Heat conduction silica gel heat conduction non-conducting and basically there is not the inviscid, when dismantling the fin, can not and BMS between there be adhesive force, convenient to detach.

The utility model provides an electric bicycle lithium cell heat radiation structure, BMS in the battery can dispel the heat rapidly through the fin among the heat radiation structure, improves the radiating effect, improves the ability of overflowing of battery, reduces the fault rate that the battery produced because of BMS generates heat.

Drawings

FIG. 1 is a schematic diagram of a battery;

FIG. 2 is an exploded view of the heat dissipation structure;

fig. 3 is a schematic structural view of the upper cover.

Reference is made to the accompanying drawings in which: 100. an upper cover; 110. a heat dissipation port; 120. an installation table; 130. fixing a column; 200. a BMS; 300. a heat sink; 310. a convex portion; 400. a heat transfer medium.

Detailed Description

The following detailed description is made of specific embodiments of the present invention with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The present embodiment provides a heat dissipation structure for a lithium battery of an electric bicycle, which is mainly applied to a lithium battery of a two-wheeled electric bicycle, as shown in fig. 1-3, the heat dissipation structure comprises an upper cover 100 and a BMS200 fixed on the upper cover 100, the upper cover 100 is provided with a heat dissipation opening 110, a heat dissipation plate 300 is disposed at the heat dissipation opening 110, and the heat dissipation plate 300 and the BMS200 are in contact connection through a heat conductive medium 400. BMS200 in the battery can rapidly dissipate heat through heat dissipation fins 300 in the heat dissipation structure, thereby improving the heat dissipation effect, improving the overcurrent capacity of the battery, and reducing the failure rate of the battery caused by heat generation of BMS 200.

The surface of the upper cover 100 is recessed to form the mounting stage 120, and the outer contour of the heat sink 300 and the shape of the mounting stage 120 are matched and fixed to the mounting stage 120. The mounting table 120 can limit the heat sink 300, which facilitates accurate and quick mounting of the heat sink 300. The inner side edge of the mounting table 120 encloses a heat dissipation opening 110, a fixing post 130 is arranged below the heat dissipation opening 110, and the BMS200 is fixed on the fixing post 130 by a screw. The BMS200 has an outer shape smaller than that of the heat dissipation port 110. This facilitates the BMS200 to take and place the BMS200 from the heat dissipation port 110.

The corner of heat sink 300 has convex portion 310, the corner of heat sink 300 has first fixing hole, the corner of mount 120 and the corner of heat sink 300 match and have second fixing hole, which may be screw hole, and heat sink 300 is fixed on upper cover 100 by screw passing through first fixing hole and second fixing hole. This can improve the contact surface between heat sink 300 and mount 120 at the corner, and provide a fixing hole for fixing the two. If the heat sink 300 and the mounting platform 120 are in large-area contact, the large-area contact between the heat sink 300 and the upper cover 100 will reduce the heat dissipation effect of the heat sink 300 and increase the material consumption for manufacturing the heat sink 300, so that the foot is in large-area contact only, so as to set a large fixing hole, correspondingly set a large screw and improve the connection strength.

The heat sink 300 is an aluminum plate. The aluminum plate is a good thermal conductor, and is convenient for rapid heat dissipation. But may be a copper plate, a stainless steel plate, or the like. The heat transfer medium 400 is heat transfer silicone grease. The heat conduction silica gel heat conduction nonconducting and basically there is not the cohesiveness, when dismantling fin 300, can not and BMS200 between the adhesive force, convenient to detach. The heat transfer medium 400 is provided at a main heat generating part of the BMS200, for example, the BMS200 has a MOS transistor having a large heat generation amount, the heat transfer medium 400 is filled between the MOS transistor and the heat sink 300, and the heat transfer medium 400 is not provided at other parts of the BMS200 having a small or no heat generation amount.

Claims

1. A lithium battery heat dissipation structure of an electric bicycle comprises an upper cover (100) and a BMS (200) fixed on the upper cover (100), and is characterized in that a heat dissipation port (110) is formed in the upper cover (100), a heat dissipation fin (300) is arranged at the position of the heat dissipation port (110), and the heat dissipation fin (300) and the BMS are in contact connection through a heat conduction medium (400).

2. The lithium battery heat dissipation structure of the electric bicycle as claimed in claim 1, wherein the surface of the upper cover (100) is recessed to form a mounting platform (120), and the outer contour of the heat sink (300) and the shape of the mounting platform (120) are matched and fixed on the mounting platform (120).

3. The lithium battery heat dissipation structure of the electric bicycle according to claim 2, wherein the inner edge of the mounting platform (120) is surrounded by the heat dissipation opening (110), a fixing post (130) is disposed under the heat dissipation opening (110), and the BMS is fixed on the fixing post (130).

4. The lithium battery heat dissipation structure of an electric bicycle according to claim 3, wherein the BMS has a smaller outer shape than the heat dissipation port (110).

5. The lithium battery heat dissipation structure of an electric bicycle according to claim 2, wherein the corner of the heat sink (300) has a convex protrusion (310), the corner of the heat sink (300) has a first fixing hole, the corner of the mounting platform (120) and the corner of the heat sink (300) are matched and have a second fixing hole, and the heat sink (300) is fixed to the upper cover (100) by a screw passing through the first fixing hole and the second fixing hole.

6. The lithium battery heat dissipation structure of the electric bicycle according to claim 1, wherein the heat sink (300) is an aluminum plate.

7. The lithium battery heat dissipation structure of the electric bicycle according to claim 1, wherein the heat conducting medium (400) is heat conducting silicone grease.