CN212907913U

CN212907913U - Battery pack for electric tool

Info

Publication number: CN212907913U
Application number: CN202021790305.4U
Authority: CN
Inventors: 蔡德时
Original assignee: Suzhou Keyis Intelligent Drive Technology Co ltd
Current assignee: Suzhou Keyis Intelligent Drive Technology Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-04-06
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses an electric tool battery pack, which comprises an upper shell, a bottom shell, a first battery cell bracket, a second battery cell bracket, an end cover, a BMS board, a battery cell and a confluence piece; the cell support I and the cell support II are respectively sleeved at two ends of a cell, two end covers are arranged, the two end covers are respectively sleeved on the cell support I and the cell support II, and the confluence sheet is electrically connected to a cell electrode and arranged between the cell support I, the cell support II and the end covers; BMS board electric connection just is equipped with the contact in the convergent current piece, and relative joint of epitheca, drain pan just sets up in the surface of two end covers. The utility model discloses the outside protecting crust from inside to outside of electric core is that electric core support contains electric core support one, electric core support two, end cover, shell epitheca, drain pan in proper order, and fixes a plurality of electric cores from the direction of difference. Electric core, electric core support and converge the piece and constitute a whole, avoid in the use to converge piece and electric core emergence and drop.

Description

Battery pack for electric tool

Technical Field

The utility model relates to an electric tool battery package belongs to battery package technical field.

Background

The battery pack is widely applied to various electric equipment, and comprises a plurality of battery cores which are fixed together through a battery core bracket. Lithium battery hand-held power tools have seen a great deal of development in recent years, one of the important reasons being the advancement of lithium battery technology and the reduction in cost. The electric tool needs to be provided with a detachable battery pack, and some collision, extrusion and vibration are inevitable in the using process of the electric tool, so that the reliability of the whole battery pack is ensured to be particularly important, and one important factor for determining the reliability of the battery pack is the strength and the reliability of a battery cell packaging structure.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art, an object of the utility model is to provide an electric tool battery package has solved the not high technical problem of electric tool battery package reliability among the prior art.

In order to achieve the above object, the utility model adopts the following technical scheme:

a battery pack of an electric tool comprises an upper shell, a bottom shell, a first battery cell support, a second battery cell support, an end cover, a BMS board, a battery cell and a bus bar;

the cell support I and the cell support II are respectively sleeved at two ends of a cell, two end covers are arranged, the two end covers are respectively sleeved on the cell support I and the cell support II, and the confluence sheet is electrically connected to a cell electrode and arranged between the cell support I, the cell support II and the end covers;

BMS board electric connection just is equipped with the contact in the convergent current piece, and relative joint of epitheca, drain pan just sets up in the surface of two end covers.

As a preferable aspect of the present invention, in the battery pack for an electric power tool, the upper case is further provided with a contact connecting groove matched with the contact.

As a preferred embodiment of the present invention, in the electric tool battery pack, the upper case is further provided with a lock catch for connecting an electric tool, the lock catch includes an unlocking button, a lock tongue and a spring, the spring is used for driving the lock tongue to be in a locked state, and the unlocking button drives the lock tongue to be unlocked.

In a preferred embodiment of the present invention, the battery pack for electric tool has notches formed on the side edges of the two end caps, the notches being matched with the BMS board.

As a preferred scheme of the present invention, in the electric tool battery pack, the first battery cell support is provided with a first battery cell mounting hole for connecting a battery cell, the second battery cell support is provided with a second battery cell mounting hole for connecting a battery cell, the first battery cell support is further provided with a connecting hole and a buckle, and the second battery cell support is respectively connected to the connecting hole and the buckle through the connecting column and the clamping groove.

As a preferable aspect of the present invention, in the foregoing electric tool battery pack, the end portions of the connection hole and the first battery cell installation hole are provided with a guide bevel angle.

As a preferred embodiment of the present invention, in the foregoing electric tool battery pack, the first cell support and the second cell support are further provided with grooves having shapes matching with those of the bus bar, the grooves are internally provided with positioning posts, the bus bar is provided with positioning holes, and the positioning holes are connected with the positioning posts.

In a preferred embodiment of the present invention, in the battery pack for an electric power tool, an end of the bus bar is electrically connected to the BMS plate through the flange.

As a preferable scheme of the invention, in the electric tool battery pack, buffering protrusions are further arranged on the outer surfaces of the two end covers, and suspension cavities are further arranged in the upper shell and the bottom shell. As a preferable aspect of the present invention, in the battery pack for an electric tool, the inner surface of the upper case is further provided with an anti-friction rib, and the anti-friction rib is connected with the lock catch.

The utility model discloses the beneficial effect who reaches:

compared with the prior art, the utility model discloses the outside protecting crust from inside to outside of electric core is that electric core support contains electric core support one, electric core support two, end cover, shell epitheca, drain pan in proper order to electric core support contains electric core support one, electric core support two, the end cover is the tip of cover at electric core, and shell epitheca, drain pan are the outside of cover at two end covers, and perpendicular with the direction of opening and shutting of two end covers, and such benefit is fixed a plurality of electric cores from the direction of difference.

Electric core is directly fixed through electric core support, fixes the piece that converges through recess and reference column in the bottom of electric core support, makes electric core, electric core support and the piece that converges constitute a whole, avoids the piece that converges to take place to drop with electric core in the use. The buffer bulges and the suspension cavities can reduce the damage of the battery cell when the battery cell falls to the maximum extent.

Drawings

FIG. 1 is an isometric view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

fig. 3 is a partially enlarged view of a first cell holder of the present invention;

fig. 4 is a partially enlarged view of the current collector and the first cell support of the present invention;

FIG. 5 is a partial enlarged view of the latch and the upper case of the present invention;

the meaning of the reference symbols in the figures: 1-locking; 2-upper shell; 3-a bottom shell; 4-BMS board; 5-end cover; 6-confluence piece; 7-cell support I; 8-battery cell bracket II; 9-electric core; 10-a suspended cavity; 11-an unlock button; 12-a bolt; 13-a spring; 21-a contact connection slot; 22-antifriction convex ribs; 41-contact; 51-notch; 52-buffer bumps; 61-positioning holes; 62-flanging; 71-a connection hole; 72-buckling; 73, a first battery cell mounting hole; 102-a groove; 101-a positioning column; 81-connecting column; 82-a card slot; and 83-cell mounting hole II.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 5: the embodiment discloses an electric tool battery pack, including epitheca 2, drain pan 3, electric core support 7, two 8 of electric core support, end cover 5, BMS board 4, electric core 9 and piece 6 that converges.

Wherein, electric core support one 7, electric core support two 8 cup joint respectively in the both ends of electric core 9, and end cover 5 has two, and two end covers 5 cup joint respectively in electric core support one 7, electric core support two 8, and the piece 6 electricity that converges is connected in electric core 9 electrode, and sets up between electric core support one 7, electric core support two 8 and end cover 5.

The BMS board 4 is electrically connected to the bus bar 6 and provided with contacts 41, and the upper case 2 and the bottom case 3 are clamped to each other and are disposed on the outer surfaces of the two end caps 5. That is to say, the external protective shell of the battery cell 9 is, in sequence, a battery cell support (including the first battery cell support 7 and the second battery cell support 8), the end cover 5 and the shell (the upper shell 2 and the bottom shell 3).

The upper case 2 is further provided with a contact connecting groove 21 matched with the contact 41, and the contact connecting groove 21 is used for penetrating through an electrode piece of the electric tool and protecting the contact 41.

The upper casing 2 is also provided with a lock catch 1 for connecting an electric tool, one end shell of the lock catch 1 is designed in a hinged mode, the lock catch 1 comprises an unlocking button 11, a lock tongue 12 and a spring 13, the spring 13 is used for driving the lock tongue 12 to be attached to the upper casing 2 in the direction, namely, the spring is driven to be in a locking state, and the unlocking button 11 is used for overcoming the elasticity of the spring 13 and driving the lock tongue 12 to be unlocked.

As shown in fig. 5: the inner surface of the upper shell 2 is also provided with anti-friction convex ribs 22, and the anti-friction convex ribs 22 are connected with the lock catch 1, so that the friction between the end part of the lock catch 1 and the inner surface of the upper shell 2 can be reduced, and the defect that the lock catch 1 is clamped is avoided.

In order to fix the BMS board 4 while reducing the occupied space of the BMS board 4, the sides of the two end caps 5 of the present embodiment are each provided with a notch 51 matching with the BMS board 4. When the two notches 51 are engaged with each other, the edge of the BMS board 4 can be fixed such that the BMS board 4 is inserted between the two end caps 5.

The first battery cell support 7 of this embodiment is provided with a first battery cell mounting hole 73 for connecting the battery cell 9, the second battery cell support 8 is provided with a second battery cell mounting hole 83 for connecting the battery cell 9, the first battery cell support 7 is further provided with a connecting hole 71 and a buckle 72, and the second battery cell support 8 is connected to the connecting hole 71 and the buckle 72 through a connecting post 81 and a clamping groove 82 respectively. This construction is very easy to assemble.

In order to facilitate assembly, the end portions of the connection hole 71 and the first cell mounting hole 73 are provided with guide bevel angles.

As shown in fig. 4: electric core support one 7, electric core support two 8 still be equipped with the groove 102 that converges piece 6 shape assorted, be equipped with reference column 101 in the groove 102, converge piece 6 is equipped with locating hole 61, reference column 101 is connected to locating hole 61, and such benefit is exactly to inlay converge piece 6 in electric core support one 7, the inside of electric core support two 8, reduces whole electric core fixed knot structure's thickness on the one hand, promotes the reliability of being connected between converge piece 6 and the electric core moreover.

The end of the bus bar 6 is electrically connected to the BMS board 4 through the flange 62.

The BMS board 4 is further provided with a temperature sensor for detecting the temperature of the battery cell 9. A temperature sensor may be appropriately inserted between the battery cells 9.

Because this embodiment is not the parcel in the inside of instrument when installing at electric tool, consequently when electric tool falls, the battery package has great probability to land earlier to the risk of battery package's corner is the biggest, in order to reduce this kind of damage to the battery package that falls as far as possible, two end cover 5 surfaces of this embodiment still are equipped with buffering arch 52, still be equipped with in epitheca 2, the drain pan 3 and hang cavity 10, it is great at the edge of epitheca 2, drain pan 3 that unsettled cavity 10, its inside can set up a plurality of protruding muscle and be used for supporting inside end cover 5, buffering arch 52 can adopt elastic material, for example rubber.

For prior art, the outside protective housing from inside to outside of this embodiment electricity core 9 is electric core support (containing electricity core support one 7, electricity core support two 8), end cover 5, shell (epitheca 2, drain pan 3) in proper order, and electricity core support (containing electricity core support one 7, electricity core support two 8), end cover 5 overlaps the tip at electricity core 9, and shell (epitheca 2, drain pan 3) are the outside of cover at two end covers 5, and perpendicular with the direction of opening and shutting of two end covers 5, such benefit is fixed a plurality of electricity cores 9 from different directions.

Electric core 9 directly fixes through electric core support, fixes the piece 6 that converges through recess 102 and reference column 101 in electric core support's bottom, makes electric core 9, electric core support and piece 6 that converges constitute a whole, avoids the piece 6 that converges to take place to drop with electric core 9 in the use.

The buffer bulge 52 and the suspension cavity 10 can reduce the damage of the battery cell when the battery cell falls to the maximum extent.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. An electric tool battery pack is characterized by comprising an upper shell (2), a bottom shell (3), a first battery cell support (7), a second battery cell support (8), an end cover (5), a BMS board (4), a battery cell (9) and a bus bar (6);

the battery cell support I (7) and the battery cell support II (8) are respectively sleeved at two ends of a battery cell (9), two end covers (5) are provided, the two end covers (5) are respectively sleeved on the battery cell support I (7) and the battery cell support II (8), and the current converging sheet (6) is electrically connected to electrodes of the battery cell (9) and is arranged among the battery cell support I (7), the battery cell support II (8) and the end covers (5);

BMS board (4) electricity is connected in converging piece (6) and is equipped with contact (41), upper shell (2), drain pan (3) relative joint just set up in the surface of two end covers (5).

2. A power tool battery pack according to claim 1, wherein the upper case (2) is further provided with a contact connecting groove (21) for mating with the contact (41).

3. The electric tool battery pack according to claim 1, wherein the upper case (2) is further provided with a lock catch (1) for connecting an electric tool, the lock catch (1) comprises an unlocking button (11), a lock tongue (12) and a spring (13), the spring (13) is used for driving the lock tongue (12) to be in a locked state, and the unlocking button (11) drives the lock tongue (12) to be unlocked.

4. A power tool battery pack according to claim 1, wherein the side edges of the two end caps (5) are provided with notches (51) matching with the BMS board (4).

5. The electric tool battery pack according to claim 1, wherein the first cell support (7) is provided with a first cell mounting hole (73) for connecting a cell (9), the second cell support (8) is provided with a second cell mounting hole (83) for connecting the cell (9), the first cell support (7) is further provided with a connecting hole (71) and a buckle (72), and the second cell support (8) is respectively connected to the connecting hole (71) and the buckle (72) through a connecting column (81) and a clamping groove (82).

6. The power tool battery pack as claimed in claim 5, wherein the ends of the connection hole (71) and the first cell mounting hole (73) are provided with guiding bevels.

7. The electric tool battery pack according to claim 1, wherein the first cell holder (7) and the second cell holder (8) are further provided with grooves (102) matched with the shape of the bus bar (6), positioning posts (101) are arranged in the grooves (102), the bus bar (6) is provided with positioning holes (61), and the positioning holes (61) are connected with the positioning posts (101).

8. The battery pack for electric power tools according to claim 1, wherein the end of the bus bar (6) is electrically connected to the BMS board (4) through a flange (62).

9. The electric tool battery pack according to claim 1, wherein buffering protrusions (52) are further arranged on the outer surfaces of the two end covers (5), and suspending cavities (10) are further arranged in the upper shell (2) and the bottom shell (3).

10. The battery pack for the electric tool as claimed in claim 1, wherein the upper case (2) is further provided with an anti-friction rib (22) on the inner surface, and the anti-friction rib (22) is connected with the lock catch (1).