CN218448125U

CN218448125U - Overcurrent protection device for power lithium ion battery pack

Info

Publication number: CN218448125U
Application number: CN202222754185.8U
Authority: CN
Inventors: 卿松; 李艾兰; 陆丽; 张靖漓
Original assignee: Nanjing Fenglue Electromechanical Technology Co ltd
Current assignee: Nanjing Fenglue Electromechanical Technology Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-02-03
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to a lithium ion battery technical field just discloses a power lithium ion battery organizes overcurrent protection device, which comprises a housin, the inside of casing is provided with the group battery, outer wall one side fixedly connected with guard box of casing, the inside fixed mounting of guard box has the shunt, and the one end fixed connection of shunt and group battery, the inner wall top fixedly connected with micro motor of guard box. Overcurrent protection is carried out on the battery pack through the shunt, the first rotating rod can be driven to rotate through the micro motor, air cooling heat dissipation is carried out on the shunt through the first fan, the first rotating rod rotates to drive the second rotating rod to rotate through the belt pulley, the first bevel gear rotates to be driven, the first bevel gear rotates to drive the second bevel gear to rotate, the third rotating rod rotates to drive the second fan to rotate, heat dissipation is carried out on the inside of the shell, and the battery pack is more stable in power supply.

Description

Overcurrent protection device for power lithium ion battery pack

Technical Field

The utility model relates to a lithium ion battery technical field specifically is a power lithium ion battery organizes overcurrent protection device.

Background

The lithium ion power battery is a novel high-energy battery successfully developed in the 20 th century. The negative electrode of this battery is made of graphite or the like, and the positive electrode is made of lithium iron phosphate, lithium cobaltate, lithium titanate or the like. The 70 s were put into practical use. Because of its advantages of high energy, high battery voltage, wide working temp. range and long storage life, it has been widely used in military and civil small-sized electric appliances, and the lithium ion power battery partially replaces the traditional battery in mobile phones, portable computers, video cameras, etc. The high-capacity lithium ion battery has been tried in electric vehicles, will become one of the main power sources of electric vehicles in the 21 st century, and has been applied to artificial satellites, aerospace and energy storage.

The patent number CN201921417381.8 discloses a soft-package lithium ion battery pack overcurrent protection device, which belongs to the field of lithium ion batteries, and the technical scheme is characterized by comprising a shell and a lithium ion battery pack formed by connecting a plurality of lithium ion batteries in series, wherein the lithium ion battery pack is arranged in the shell, and the soft-package lithium ion battery pack overcurrent protection device also comprises a control circuit board which is arranged in the shell and is electrically connected with the lithium ion battery pack; the control circuit board comprises a protection chip and a charging control switch, the charging control switch is connected in series in a charging and discharging main circuit of the lithium ion battery pack, and the protection chip is connected in parallel with the charging control switch to control the on and off of the charging control switch; and the shunt mechanism is connected with the single lithium ion battery in parallel, and the triggering shunt voltage of the shunt mechanism is greater than the rated voltage of the single lithium ion battery. The problem that when a single lithium ion battery is charged to a voltage exceeding a rated voltage, chemical side reactions of the battery are intensified, and the battery is damaged or the safety problem is caused is solved.

The battery pack overcurrent protection device in the prior art has the following defects: this protection device can not dispel the heat when shunting the protection, and the easy too high shunt that causes of temperature damages, reduces the reposition of redundant personnel effect, can not effectively protect the group battery.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

To the deficiency of the prior art, the utility model provides a power lithium ion battery organizes overcurrent protection device.

(II) technical scheme

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a power lithium ion battery group overcurrent protection device, includes the casing, the inside of casing is provided with the group battery, outer wall one side fixedly connected with guard box of casing, the inside fixed mounting of guard box has the shunt, and the one end fixed connection of shunt and group battery, the inner wall top fixedly connected with micro motor of guard box, the first bull stick of micro motor's output fixedly connected with, the first fan of the bottom fixedly connected with of first bull stick.

Preferably, the inner wall top of guard box rotates through first bearing and is connected with the second bull stick, the first bevel gear of bottom fixedly connected with of second bull stick, the fixed cover of outer wall of first bull stick is equipped with the action wheel of belt pulley, and the fixed cover of follow driving wheel of belt pulley establish on the second bull stick, the inner wall top fixedly connected with bracing piece of casing, the bottom of bracing piece rotates through the second bearing and is connected with the third bull stick, the one end fixedly connected with second bevel gear of third bull stick, and second bevel gear is connected with the meshing of first bevel gear, the other end fixedly connected with second fan of third bull stick.

Preferably, the one end of casing is provided with the mouth that charges, one side of the mouth that charges articulates there is the apron, through setting up the mouth that charges, is for the convenience of charging for the group battery, through setting up the apron, is for the protection mouth that charges, avoids the mouth that charges to damage.

Preferably, one side fixedly connected with containing box of casing, the inside of containing box is provided with the connecting wire, and connecting wire and group battery electric connection, through setting up the connecting wire, is for the convenience of the group battery supplies power for external equipment, through setting up the containing box, is for the convenience of accomodating the connecting wire to protect the connecting wire.

Preferably, the micro motor is electrically connected with the battery pack, and the micro motor is electrically connected with the battery pack so as to drive the micro motor to work when the battery pack supplies power externally, thereby achieving the purpose of saving energy.

Preferably, the top of the protection box is provided with heat dissipation holes, and the heat dissipation holes are arranged to improve heat dissipation.

(III) advantageous effects

Compared with the prior art, the utility model provides a power lithium ion battery organizes overcurrent protection device possesses following beneficial effect:

(one), this a power lithium ion battery group overcurrent protection device, carry out overcurrent protection to the group battery through the shunt, can drive first bull stick rotation through setting up the micro motor, thereby drive first fan and carry out the forced air cooling heat dissipation to the shunt, first bull stick rotates and can drive the rotation of second bull stick through the belt pulley, thereby drive first bevel gear and rotate, first bevel gear rotates and can drive second bevel gear and rotate, thereby drive the rotation of third bull stick, the rotation of third bull stick can drive the rotation of second fan, thereby dispel the heat to the inside of casing, thereby make the group battery power supply more stable.

(two), this a power lithium ion battery group overcurrent protection device, through setting up the mouth that charges, be for the sake of charging for the group battery, through setting up the apron, be for the protection mouth that charges, avoid the mouth that charges to damage, through setting up the connecting wire, be for the sake of the group battery supplies power for external equipment, through setting up the containing box, be for the sake of the convenience containing connecting wire to protect the connecting wire.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a front cross-sectional view of the present invention;

fig. 4 is an enlarged view of the position a of the present invention.

In the figure: 1. a housing; 2. a battery pack; 3. a protection box; 4. a flow divider; 5. a micro motor; 6. a first rotating lever; 7. a first fan; 8. a second rotating rod; 9. a first bevel gear; 10. a belt pulley; 11. a support bar; 12. a third rotating rod; 13. a second bevel gear; 14. a second fan; 15. a charging port; 16. a cover plate; 17. a storage box; 18. and connecting the wires.

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.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As shown in fig. 1-4, the present invention provides an overcurrent protection device for a power lithium ion battery pack, which comprises a housing 1, a battery pack 2 is disposed inside the housing 1, a protection box 3 is fixedly connected to one side of an outer wall of the housing 1, a shunt 4 is fixedly mounted inside the protection box 3, the shunt 4 is fixedly connected to one end of the battery pack 2, a micro-motor 5 is fixedly connected to a top portion of an inner wall of the protection box 3, a first rotating rod 6 is fixedly connected to an output end of the micro-motor 5, a first fan 7 is fixedly connected to a bottom portion of the first rotating rod 6, a second rotating rod 8 is rotatably connected to the top portion of the inner wall of the protection box 3 through a first bearing, a first bevel gear 9 is fixedly connected to a bottom portion of the second rotating rod 8, a driving wheel of a belt pulley 10 is fixedly sleeved on an outer wall of the first rotating rod 6, a driven wheel of the belt pulley 10 is fixedly sleeved on the second rotating rod 8, a support rod 11 is fixedly connected to a top portion of the inner wall of the housing 1, a bottom portion of the support rod 11 is rotatably connected to a third rotating rod 12 through a second bearing, a second rotating rod is fixedly connected to a charging box 15, a charging box 15 is disposed on one side of the charging box for preventing the charging box 2 from being damaged by a charging box 15, the charging box, a charging box 17 is disposed on one side of the charging box, a charging box, the charging box, a charging box 17, a charging box 16 is disposed on the charging box for preventing the charging box from being damaged, the connecting wire 18 is for the convenience of accomodating to protect connecting wire 18, micro motor 5 and group battery 2 electric connection, through with micro motor 5 and group battery 2 electric connection, be for making group battery 2 drive micro motor 5 work when to outer power supply, thereby reach the purpose of the energy can be saved, the louvre has been seted up at the top of guard box 3, through setting up the louvre, is for improving the heat dissipation.

The working principle of the over-current protection device for the power lithium ion battery pack is described in detail below.

As shown in fig. 1-4, when in use, the cover plate 16 is opened, the charging head is connected with the charging port 15 to charge the battery pack 2, after the charging, the charging head is taken down, the cover plate 16 is covered, the connection with the external device is realized through the connecting wire 18, power supply to the external device is facilitated, when the battery pack 2 supplies power to the outside, the micro motor 5 is started, overcurrent protection is performed on the battery pack 2 through the shunt 4, the micro motor 5 drives the first rotating rod 6 to rotate, so as to drive the first fan 7 to perform air cooling heat dissipation on the shunt 4, the first rotating rod 6 rotates to drive the second rotating rod 8 to rotate through the belt pulley 10, so as to drive the first bevel gear 9 to rotate, the first bevel gear 9 rotates to drive the second bevel gear 13 to rotate, so as to drive the third rotating rod 12 to rotate, the third rotating rod 12 rotates to drive the second fan 14 to rotate, so as to dissipate heat inside of the housing 1, so as to make power supply of the battery pack 2 more stable.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely 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. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The utility model provides a power lithium ion battery organizes overcurrent protection device, includes casing (1), its characterized in that: a battery pack (2) is arranged in the shell (1), a protection box (3) is fixedly connected to one side of the outer wall of the shell (1), a shunt (4) is fixedly installed in the protection box (3), and the shunt (4) is fixedly connected with one end of the battery pack (2);

the inner wall top fixedly connected with micro motor (5) of guard box (3), the first bull stick (6) of output fixedly connected with of micro motor (5), the first fan (7) of bottom fixedly connected with of first bull stick (6).

2. The over-current protection device of the power lithium ion battery pack according to claim 1, characterized in that: the inner wall top of guard box (3) rotates through first bearing and is connected with second bull stick (8), the first bevel gear (9) of bottom fixedly connected with of second bull stick (8), the fixed cover of outer wall of first bull stick (6) is equipped with the action wheel of belt pulley (10), and the fixed cover of follow driving wheel of belt pulley (10) establishes on second bull stick (8), the inner wall top fixedly connected with bracing piece (11) of casing (1), the bottom of bracing piece (11) rotates through the second bearing and is connected with third bull stick (12), the one end fixedly connected with second bevel gear (13) of third bull stick (12), and second bevel gear (13) are connected with first bevel gear (9) meshing, the other end fixedly connected with second fan (14) of third bull stick (12).

3. The over-current protection device of the power lithium ion battery pack according to claim 1, characterized in that: one end of the shell (1) is provided with a charging port (15), one side of the charging port (15) is hinged with a cover plate (16), and the charging port (15) is arranged, so that the battery pack (2) can be charged conveniently.

4. The over-current protection device of the power lithium ion battery pack of claim 1, characterized in that: one side fixedly connected with containing box (17) of casing (1), the inside of containing box (17) is provided with connecting wire (18), and connecting wire (18) and group battery (2) electric connection.

5. The over-current protection device of the power lithium ion battery pack of claim 1, characterized in that: the micro motor (5) is electrically connected with the battery pack (2).

6. The over-current protection device of the power lithium ion battery pack of claim 1, characterized in that: the top of the protection box (3) is provided with heat dissipation holes.