CN113782908B

CN113782908B - Battery pack

Info

Publication number: CN113782908B
Application number: CN202110625865.7A
Authority: CN
Inventors: 吴小力; 董志军
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2020-06-10
Filing date: 2021-06-04
Publication date: 2024-01-19
Anticipated expiration: 2041-06-04
Also published as: CN113782908A

Abstract

The invention discloses a battery pack, comprising: a housing; the battery cell group comprises a plurality of battery cells, and the battery cell group is positioned in an accommodating space formed by the shell; a battery pack interface formed at an upper side of the housing for detachably connecting the battery pack to an electrical tool in a first direction; one side of the shell away from the upper side is the lower side; the battery pack outputs electric energy of the battery cell group at least through the connecting terminals; the connection terminal includes: a first terminal piece and a second terminal piece that abuts against the first terminal piece, wherein the first terminal piece and the second terminal piece abut against to form a first clamping area that can clamp a tool terminal of the electric tool and a second clamping area that can clamp the same tool terminal; the first clamping area and the second clamping area are staggered in the first direction. The invention provides a battery pack with good vibration resistance and reliable connection, which is suitable for an electric tool, and a connection terminal of the battery pack.

Description

Battery pack

Technical Field

The present invention relates to a battery pack, and more particularly, to a battery pack suitable for an electric tool.

Background

Battery packs are widely used in power tools to provide power to the power tools. The electric tool is provided with a terminal seat pole piece, the battery pack is provided with a connecting terminal, and when the battery pack is connected with the electric tool, the battery pack is connected with the connecting terminal through the terminal seat pole piece in an inserting mode so as to conduct a power supply.

In the working process of the battery pack matched with the electric tool, vibration always exists, the vibration frequency and the period are different, and the connection terminal of the battery pack is required to be designed in a limited space due to the restriction of related factors such as modeling, a platform, plug force and the like, so that the plug force is ensured to be proper, and the battery pack is wear-resistant and is in contact with an uninterrupted power terminal.

Because of the vibration of the electric tool in the use process, the contact failure risk exists between the connecting terminal of the existing battery pack and the terminal block pole piece of the electric tool at the contact position, and the problem that the battery pack cannot supply power to the electric tool or power supply is interrupted can be caused.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide a battery pack which has good vibration resistance and is reliably connected and is suitable for an electric tool and a connecting terminal of the battery pack.

In order to achieve the above object, the present invention adopts the following technical scheme: a battery pack, comprising: a housing; the battery cell group comprises a plurality of battery cells, and the battery cell group is positioned in an accommodating space formed by the shell; a battery pack interface formed at an upper side of the case for detachably connecting the battery pack to the electrical tool in a first direction; defining the side of the shell away from the upper side as the lower side; the battery pack outputs electric energy of the battery cell group at least through the connecting terminals; the connection terminal includes: the electric tool comprises a first terminal piece and a second terminal piece which is abutted with the first terminal piece, wherein the first terminal piece and the second terminal piece are abutted to form a first clamping area capable of clamping a tool terminal of the electric tool and a second clamping area capable of clamping the same tool terminal; the first clamping area and the second clamping area are staggered in the first direction.

Further, the first terminal piece includes a first outer connecting piece and a first inner connecting piece; the first outer connecting piece extends out of the first outer support leg along a first direction; the first inner connecting piece extends out of the first inner support leg along a first direction; the second terminal piece comprises a second outer connecting piece and a second inner connecting piece; the second outer connecting piece extends out of the second outer support leg along the first direction; the second inner connecting piece extends out of the second inner support leg along the first direction; wherein the first outer leg and the second outer leg abut to form a first clamping area capable of clamping the tool connection terminal; the first inner leg and the second inner leg are abutted to form a second clamping area for clamping the tool connection terminal; when the battery pack is mounted to the electric tool, the first clamping area is contacted with the tool terminal first, and then the second clamping area is contacted with the tool terminal.

Further, the first outer connecting member, the first inner connecting member, the second inner connecting member, and the second outer connecting member are disposed at intervals in a second direction perpendicular to the first direction.

Further, the first terminal piece includes a first connecting member connecting the first outer connecting member and the first inner connecting member; the second terminal plate includes a second connecting member connecting the second outer connecting member and the second inner connecting member.

Further, the battery pack further includes: the circuit board is used for fixing the connecting terminal; the first terminal piece further includes: at least one first supporting leg extending downwards from the first outer connecting piece and connected with the circuit board so as to fix the first terminal piece; the second terminal piece further includes: and at least one second supporting leg extending downwards from the second outer connecting piece and connected with the circuit board to fix the second terminal plate.

Further, the length of the first support leg in the first direction is less than the length of the first outer link; the second support leg has a length in the first direction that is less than the length of the second outer connector.

Further, the first connector is disposed away from the first outer leg and the first inner leg in a first direction.

Further, the first connector is adjacent to the upper side of the housing.

Further, the second connector is adjacent to the underside of the housing.

Further, the first terminal piece is integrally formed; the second terminal piece is integrally formed.

A battery pack and power tool combination comprising: the electric tool comprises a tool main body, a tool interface and a tool matching part, wherein the tool interface and the tool matching part are arranged on the tool main body; the battery pack is provided with a battery pack interface and a battery pack combining part, the battery pack interface is arranged to be matched with the tool interface to supply power for the electric tool, and the battery pack combining part can be detachably connected with the tool matching part; a battery pack, further comprising: a housing; the battery cell group comprises a plurality of battery cells, and the battery cell group is positioned in an accommodating space formed by the shell; a battery pack interface formed at an upper side of the case for detachably connecting the battery pack to the electrical tool in a first direction; the side of the shell far away from the upper side is the lower side; the battery pack outputs electric energy of the battery cell group at least through the connecting terminals; the connection terminal includes: the electric tool comprises a first terminal piece and a second terminal piece which is abutted with the first terminal piece, wherein the first terminal piece and the second terminal piece are abutted to form a first clamping area capable of clamping a tool terminal of the electric tool and a second clamping area capable of clamping the same tool terminal; the first clamping area and the second clamping area are staggered in the first direction.

The invention has the advantages of improving the vibration resistance of the battery pack and improving the connection reliability of the battery pack and the electric tool.

Drawings

FIG. 1 is a schematic view of a battery pack and power tool;

fig. 2 is a structural view of a battery pack as one of the embodiments;

fig. 3 is a schematic view of the internal structure of the battery pack case of fig. 1 with the battery pack removed;

FIG. 4 is a schematic view of the structure of the power tool terminal block and the tool terminal;

fig. 5 is a block diagram of one bit direction of a connection terminal as one embodiment;

FIG. 6 is a block diagram of another orientation of a connection terminal as one embodiment;

fig. 7 is a block diagram of one bit direction of the first terminal piece of the connection terminal shown in fig. 5;

fig. 8 is a structural view of a second terminal plate of the connection terminal shown in fig. 5;

fig. 9 is another positional structural view of the first terminal piece of the connection terminal shown in fig. 5;

FIG. 10 is a force analysis diagram of the first terminal piece of FIG. 7 as the tool terminals are displaced;

fig. 11 is a force analysis diagram of the second terminal plate shown in fig. 8 when the tool terminal is displaced;

fig. 12 is a structural view of a connection terminal of another embodiment;

fig. 13 is a structural view of a second terminal plate of the connection terminal shown in fig. 12.

Detailed Description

The invention is described in detail below with reference to the drawings and the specific embodiments.

Fig. 1 shows a power tool 100 and a battery pack 200 that can adapt the power tool 100 and power the power tool 100. In this embodiment, the power tool 100 is an electric drill, but it should be understood that the present application is not limited to the disclosed embodiments, but is applicable to other types of power tools 100 including, but not limited to, electric hammers, sanders, angle grinders, electric wrenches, electric saws.

The power tool 100 includes: the tool body 10, the tool interface 30 and the tool engaging portion 20 provided on the tool body 10, and the battery pack 200 is provided with a battery pack interface 45 and a battery pack engaging portion 44. The battery pack interface 45 is used to adapt the tool interface 30 to power the power tool 100. The battery pack coupling portion 44 is detachably coupled to the tool engaging portion 20 so that the battery pack 200 can supply power to the power tool 100.

In the following description, the front-rear-left-right direction will be described with reference to the direction indicated by the arrow in fig. 2.

Referring to fig. 1 to 2, the tool body 10 includes: a housing 11, a functional member 12, a motor 13, a grip portion 15, and an operation switch 14.

The functional element 12 is used for realizing the function of the electric tool 100, and the functional element 12 is driven to operate by the motor 13. The functional element 12 differs for different power tools 100. For example, for angle grinders, the functional member 12 is a blade for performing a grinding or cutting function. The functional element 12 is connected to the motor 13, in particular the functional element 12 is connected to the motor 13 via an output shaft and a transmission. The motor 13 includes a rotor, a stator, and a motor shaft, and is connected to the output shaft and the motor shaft through a transmission mechanism to transmit the driving force of the motor to the output shaft.

The housing 11 is formed with a head housing space capable of accommodating the motor 13 and the transmission mechanism. The tool body 10 further includes a grip portion 15, the grip portion 15 may be formed as a separate piece or from the housing 11, the grip portion 15 being grippable by a user to operate the power tool 100.

The handle 15 is also provided with an operation switch 14, the operation switch 14 is used for starting or stopping the operation of the motor 13, and the operation switch 14 can also be used for realizing the speed regulation of the motor 13. The operating switch 14 may be, but is not limited to, a trigger, a knob, a sliding mechanism, etc. The power tool 100 is provided with a tool engaging portion 20 and a tool interface 30 at a lower end of the grip portion.

The battery pack 200 is used to supply power to the power tool 100, and as shown in fig. 2 and 3, the battery pack 200 includes: a battery pack housing 41, a circuit board 42, and a battery cell assembly 43.

The battery pack case 41 includes an upper case 411 and a lower case 412. The upper case 411 and the lower case 412 are assembled to form an accommodating space to fix and accommodate the cell assembly 43. A battery pack coupling portion 44 is formed on one upper surface of the battery pack case 41, the battery pack coupling portion 44 being capable of mating with the tool mating portion 20 such that the battery pack 200 is detachably attached to the bottom of the power tool 100 in the first direction, and in some embodiments, the battery pack coupling portion 44 is provided with a pair of sliding portions having an inverted L-shaped cross section. Accordingly, to attach the battery pack 200 to the tool body 10, the sliding portion is capable of sliding along the tool engaging portion 20 at the bottom of the handle to be mounted to the tool body 10 by the tool engaging portion 20, and in some embodiments, the tool engaging portion 20 is provided as a pair of rails. More specifically, when the user slides the battery pack 200 toward the front of the tool body 10, the battery pack 200 may be connected thereto.

The battery pack 200 further includes a battery pack interface 45, and in some embodiments, the battery pack interface 45 is formed at an upper side of the battery pack housing 41 for detachably connecting the battery pack 200 to the power tool 100 in the first direction. The battery pack interface 45 includes a power positive interface 451, a power negative interface 452, and a power communication interface 453. The battery pack 200 provides power to the power tool 100 through the power positive interface 421 and the power negative interface 452; the battery pack 200 communicates with the power tool 100 through the power communication interface 453. In a specific embodiment, the housing is provided with 6 battery pack interfaces 45, it being understood that the battery pack housing 41 may be provided with more or fewer battery pack interfaces 45 depending on the electrical characteristics of the battery pack 200.

The battery module 43 includes a plurality of battery cells 431, and the plurality of battery cells are connected in series, parallel, or a combination of series and parallel to form the battery module 43. In some embodiments, the battery cells 431 are in a flat bag structure, and a plurality of battery cells 431 are stacked and arranged along the up-down direction, and the battery cells 431 can be bent into an arc shape. In other embodiments, the battery cells 431 have a cylindrical structure. It is to be understood that the present application is not limited to the disclosed embodiments, but is not limited to the structure of the cells herein.

The circuit board 42 is located between the upper case 411 and the cell assembly 43, and is connected with the cell assembly 43. The circuit board 42 includes a power management module (not shown) and a plurality of connection terminals 46. The power management module is configured to perform power management on the battery pack 200, so as to implement charge and discharge management of the battery pack 200. The connection terminal 46 is located in the battery pack interface 45 and is configured to mate with the tool terminal 17 of the power tool 100 to output the power of the battery pack 43 to the power tool 100. The circuit board 42 is also used for fixing the connection terminal 46, the connection terminal 46 includes a power supply terminal 461 and a battery pack communication terminal 462, and the power supply terminal 461 includes a battery pack negative terminal 4611 and a battery pack positive terminal 4612. Wherein the battery pack negative terminal 4611 and the battery pack positive terminal 4612 are used to power the power tool 100 that is coupled to the battery pack interface 45. The battery pack communication terminal 462 is located in the power communication interface 453 to communicate with the power tool 100 that is connected to the battery pack interface 45. In the present embodiment, the 6 connection terminals 46 are respectively: the battery pack comprises a first battery pack negative terminal, a second battery pack negative terminal, a first battery pack communication terminal, a second battery pack communication terminal, a first battery pack positive terminal and a second battery pack positive terminal. Wherein the first battery pack negative terminal and the second battery pack negative terminal are connected in parallel and connected to one electrode of the cell assembly 43, and the first battery pack positive terminal and the second battery pack positive terminal are connected in parallel and connected to the other electrode of the cell assembly 43. Thus, when discharging the battery pack 200, a discharge current will flow through the battery pack positive terminal and the battery pack negative terminal; and when the battery pack 200 is charged, a charging current will flow through the battery pack negative terminal 4611 and the battery pack positive terminal 4612. In the present embodiment, the terminal structures of the power supply terminal 461 and the battery pack communication terminal 462 are different.

Referring to fig. 4, the power tool 100 further includes a terminal block 16 and a tool terminal 17, the terminal block 16 for fixing the tool terminal 17 at a predetermined position, and the tool terminal 17 can be plugged with the battery pack 200 connection terminal 46 when the battery pack 200 is connected with the power tool 100, so as to achieve electrical connection of the power tool 100 and the battery pack 200. Specifically, the terminal block 16 and the tool terminal 17 are located in the tool interface 30 at the bottom end of the grip portion 15.

Referring to fig. 5 to 8, as a specific structure of the connection terminal 46 of an embodiment, the connection terminal 46 clamps the tool terminal 17 by elastic force from both sides in the left-right direction, respectively. That is, the connection terminal 46 includes a clamping region. In addition, the tool terminal 17 of the power tool 100 is guided by the battery pack interface 45 of the battery pack 200 to be inserted into the connection terminal 46 during sliding, so that the tool terminal 17 of the power tool 100 is electrically connected to the battery pack connection terminal 46.

The connection terminal 46 includes a first terminal piece 463 and a second terminal piece 464 that abuts against the first terminal piece 463, and the first terminal piece 463 and the second terminal piece 464 are provided independently of each other. The first and second terminal pieces 463, 464 abut to form a clamping region configured to clamp the tool terminal 17, i.e. the tool terminal 17 is insertable between the first and second terminal pieces 463, 464. In some embodiments, the first and second terminal pieces 463, 464 abut to form first and second clamping regions 465, 466 capable of clamping the tool terminals 17, and the first and second clamping regions 465, 466 are staggered in the first direction. So that both clamping portions can simultaneously clamp the tool terminal 17. Here, the first clamp region 465 and the second clamp region 466 remain in an electrically conductive state. In some embodiments, the first clamping area 465 and the second clamping area 466 can also clamp other terminals that can mate with the connection terminal 46, such as terminals of a charger, without limitation. In some embodiments, the first and second terminal pieces 463 and 464 are each integrally formed of a conductive metal.

Specifically, the first terminal piece 463 includes a first outer connector 4631 and a first inner connector 4632, and the second terminal piece 464 includes a second outer connector 4641 and a second inner connector 4642. Wherein the first outer connecting member 4631, the first inner connecting member 4632, the second inner connecting member 4642, and the second outer connecting member 4641 are disposed at intervals in a second direction perpendicular to the first direction.

The first outer link 4631 extends in a first direction beyond the first outer leg 4633 and the first inner link 4632 extends in a first direction beyond the first inner leg 4634. The second outer connector 4641 extends in a first direction with the second outer leg 4643 and the second inner connector 4642 extends in a first direction with the second inner leg 4644. The first outer leg 4633 and the second outer leg 4643 abut to form the first clamping area 465 capable of clamping the tool connection terminal 46; the first inner leg 4634 and the second inner leg 4644 abut to form a second clamping region 466 for clamping the tool connection terminal 46. When the battery pack 200 is mounted to the power tool 100, i.e., when the battery pack 200 is slid along the bottom of the handle of the tool body 10 to be attached, the tool terminals 17 are plugged into the connection terminals 46, the first clamping areas 465 come into contact with the tool terminals 17 before the second clamping areas 466 come into contact with the tool terminals 17.

The first outer leg 4633 is bent from one end of the first outer connecting member 4631 inwardly of the connecting terminal 46 to extend in a first direction, the second outer leg 4633 is bent from one end of the second outer connecting member 4641 inwardly of the connecting terminal 46 to extend in the first direction to contact corresponding portions of the pair of first outer legs 4633 to form a first contact point 467, and the first outer leg 4633 and the second outer leg 4643 are bent outwardly of the connecting terminal 46 at the first contact point 467 to form a first gap 4651 at the end of the first clamping area 465 to guide the tool terminal 17 into the first clamping area 465. Likewise, the first inner leg 4634 is bent inwardly of the connection terminal 46 from one end of the first inner connecting member 4632 to extend in the first direction, the second inner leg 4644 is bent inwardly of the connection terminal 46 from one end of the second inner connecting member 4642 to extend in the first direction to contact corresponding portions of the pair of first inner legs 4634 to form a second contact point 468, and the first inner leg 4634 and the second inner leg 4644 are bent outwardly of the connection terminal 46 at the second contact point to form a second gap 4652 at the end of the second clamping region 466 to guide the tool terminal 17 into the second clamping region 466. In some embodiments, the length of the second outer leg 4633 is greater than the length of the first inner leg 4634, the first outer leg 4633 and the second outer leg 4633 are the same length, and the first inner leg 4634 and the second inner leg 4634 are the same length, such that the first outer leg 4633 and the first inner leg 4634 can abut to form a first clamping region 465, the second outer leg 4643 and the second inner leg 4644 can abut to form a second clamping region 466, and the first clamping region 465 and the second clamping region 466 are disposed back and forth in the first direction. In some embodiments, the distance between the first contact point 467 and the second contact point 468 is 7mm or less, and further, the distance between the first contact point 467 and the second contact point 468 is 5mm or less, so that the connection terminal 46 can be adapted to the shorter tool terminal 17 to enable the smaller tool terminal 17 to contact the first contact point 467 and the second contact point 467 at the same time, thereby improving the vibration resistance of the battery pack 200.

In some embodiments, the first clamping region 465 is divided into two equal longitudinal widths by a slit disposed in a first direction from one end of the first clamping region 465. The second gripping region 466 is also divided into two equal longitudinal widths, the slit being disposed in the first direction from one end of the second gripping region 466.

In some embodiments, the first outer leg 4633 and the second outer leg 4643 are also provided with a boss, respectively, at the first contact point 467 to increase the clamping force of the first clamping region 465 on the tool terminal 17. Likewise, the first and second inner legs 4634, 4644 may also be respectively bumped at the second contact point to increase the clamping force of the second clamping region 466 against the tool terminal 17.

According to the structure of the connection terminal 46 thus constructed, when the battery pack 200 is mounted to the power tool 100, the tool terminal 17 enters the battery pack interface 45, when the battery pack 200 continues to slide, the tool terminal 17 enters the first gap 4651 formed at the end of the first clamping area 465, then enters the first clamping area 465, the battery pack 200 continues to move in the first direction, the tool terminal 17 enters the second gap 4652 formed at the end of the corresponding second clamping area 466, and enters the second clamping area 466. Accordingly, as the battery pack 200 is inserted into the power tool 100 in the first direction, the connection terminals 46 will be press-fitted between the clamping areas, and then the tool terminals 17 and the connection terminals 46 are electrically connected by the press-contact of the first terminal pieces 463 and the second terminal pieces 464 with each other, which effectively prevents heat accumulation and chattering generated at the contact points of the connection terminals 46 and the tool terminals 17.

The first terminal 463 further includes a first supporting leg 463, where the first supporting leg 463 extends downward from the first external connecting member 4631, and is connected with the circuit board 42 for fixing the first terminal 463. In some embodiments, the length of the first support leg 4635 in the first direction is smaller than the length of the first external connection member 4631, so that the contact area of the first terminal plate 463 and the circuit board 42 is small to achieve elastic connection of the first terminal plate 463 and the circuit board 42. In some embodiments, the first terminal piece 463 further includes a first auxiliary supporting portion 463, the first auxiliary supporting portion 463 includes an extension arm 463 and a supporting arm 463, the supporting arm 463 is connected with the circuit board 42 and is spaced from the first supporting leg 463, the supporting arm 463 is connected with the first external connecting member 463 through the extension arm 463, and the first auxiliary supporting portion 4636 can make the connection between the first terminal piece 463 and the circuit board 42 more stable. In some embodiments, the first terminal piece 463 is provided with a plurality of first support feet 4635 in a first direction.

In this way, referring to fig. 9, when the vibration of the power tool 100 causes the tool terminal 17 to displace to apply a force to the first terminal piece 463, the first terminal piece 463 can float around the intersection P1 of the first auxiliary supporting portion 4636 and the first external connecting member 4631, thereby improving the vibration resistance of the battery pack 200, and maintaining the contact area of the connecting terminal 46 and the tool terminal 17, suppressing an increase in contact resistance, thereby suppressing heat generated in the connecting electrons due to the increase in contact resistance.

In addition, the second terminal plate 464 further includes a second supporting leg 4645, and the second supporting leg 4645 extends downward from the second external connection member 4641 to be connected with the circuit board 42 for fixing the second terminal plate 464. In some embodiments, the length of the second support leg 4645 in the first direction is less than the length of the second outer connector 4641 to achieve the elastic connection of the second terminal plate 464 and the circuit board 42. The second terminal plate 464 further includes a second auxiliary supporting portion 4646, and in some embodiments, the second auxiliary supporting portion 4646 extends from the second external connection member 4641 in the second direction to make the connection of the second terminal plate 464 and the circuit board 42 more stable. It is understood that the second auxiliary supporting part 4646 may also have a similar structure to the first auxiliary supporting part 4636, and the second terminal plate 464 may be floated around the intersection of the second auxiliary supporting part 4646 and the second external connecting member 4641 while increasing the stability of the second terminal plate 464, thereby improving the vibration resistance of the battery pack 200.

In addition, the first terminal piece 463 further includes a first connecting member 463, and the first connecting member 463 is disposed between the first outer connecting member 4631 and the first inner connecting member 4632 to connect the first outer connecting member 4631 and the first inner connecting member 4632, so that the first outer leg 4633 and the first inner leg 4634 are connected, and thus the first inner leg 4634 can be interlocked with the first outer leg 4633, i.e., the first inner leg 4634 can move along with the first outer leg 4633. In some embodiments, first connector 4637 is adjacent to the upper side of the housing, i.e., first connector 4637 connects the upper portions of first outer connector 4631 and first inner connector 4632; in other embodiments, the first connector 4637 is disposed away from the first outer leg 4633 and the first inner leg 4634 in a first direction, i.e., the first connector 4637 connects the rear portions of the first outer connector 4631 and the first inner connector 4632.

Also, the second terminal plate 464 further includes a second connecting member 4647, and the second connecting member 4647 is disposed between the second outer connecting member 4641 and the second inner connecting member 4642 to connect the second outer connecting member 4641 and the second inner connecting member 4642, thereby connecting the second outer leg 4643 and the first inner leg 4634, so that the second outer leg 4643 can be interlocked with the second inner leg 4644, i.e., the first inner leg 4634 can move with the second outer leg 4643. In some embodiments, the second connector 4647 is proximate to the underside of the battery pack housing 41, i.e., the second connector 4647 connects the second outer connector 4641 and the lower portion of the second inner connector 4642.

In this way, as shown in fig. 10 to 11, when the tool terminal 17 moves leftward, the first outer leg 4633 moves leftward by the force applied from the tool terminal 17, and the first outer leg 4633 transmits the force applied to the first inner leg 4634 through the first connecting member 4637 to thereby move the first inner leg 4634, so that the first inner leg 4634 also moves leftward following the first outer leg 4633; at this time, the second inner leg 4644 is also moved leftward by the force applied from the tool terminal 17, and the second inner leg 4644 transmits the received force to the second outer leg 4643 through the second connection member 4647 to move the second outer leg 4643, so that the second outer leg 4643 also moves leftward following the second inner leg 4644. It will be appreciated that as the tool terminal 17 moves to the right, the first inner leg 4633 moves to the right under the force applied by the tool terminal 17, and the first outer leg 4633 also follows the first inner leg 4634 to the right; at this time, the second outer leg 4643 is also moved rightward by the force applied by the tool terminal 17, and thus the second inner leg 4644 is also moved rightward following the first outer leg 4633.

In this way, the first terminal piece 463 and the second terminal piece 464 can move following the direction in which the tool terminal 17 moves, so that the first clamping area 465 and the second clamping area 466 remain relatively stable, maintaining the clamping force unchanged. Therefore, even if the tool terminal 17 moves continuously due to vibration of the power tool 100 and is displaced, a contact failure between the connection terminal 46 and the tool terminal 17 can be prevented.

Referring to fig. 12 to 13, as a specific structure of a connection terminal 46 of another embodiment, a structure different from that of the example connection terminal shown in fig. 5 is: the first connection 4637 of the first terminal piece 463 is disposed away from the first outer leg 4633 and the first inner leg 4634 in a first direction, connecting the rear portions of the first outer connection 4631 and the first inner connection 4632. And the second auxiliary supporting portion 4646 of the second terminal plate 464 extends from the second external connection member 4641 in the first direction.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.

Claims

1. A battery pack, comprising:

a housing;

the battery cell group comprises a plurality of battery cells, and the battery cell group is positioned in an accommodating space formed by the shell;

a battery pack interface formed at an upper side of the housing for detachably connecting the battery pack to the electric tool in a first direction; defining a side of the housing away from the upper side as a lower side;

the battery pack outputs electric energy of the battery cell group at least through the connecting terminals;

the connection terminal includes:

a first terminal plate and a second terminal plate abutting against the first terminal plate,

wherein,

the first terminal piece and the second terminal piece are abutted to form a first clamping area capable of clamping a tool terminal of an electric tool and a second clamping area capable of clamping the same tool terminal;

the first clamping area and the second clamping area are staggered in the first direction;

the first terminal piece comprises a first outer support leg and a first inner support leg connected to the first outer support leg, and the first outer support leg and the first inner support leg are arranged on two sides of the tool terminal;

the second terminal piece includes a second outer leg and a second inner leg connected to the second outer leg; the second outer support leg and the second inner support leg are arranged on two sides of the tool terminal;

the first outer leg abuts the second outer leg to form the first clamping area capable of clamping the tool connection terminal.

2. The battery pack according to claim 1, wherein:

the first terminal piece includes a first outer connector and a first inner connector;

the first outer connector extends out of the first outer leg in a first direction;

the first inner connector extends out of the first inner leg in a first direction;

the second terminal piece comprises a second outer connecting piece and a second inner connecting piece;

the second outer connector extends out of the second outer leg in a first direction;

the second inner connecting piece extends out of the second inner support leg along a first direction;

wherein,

the first inner leg and the second inner leg abut to form a second clamping area for clamping the tool connection terminal;

when the battery pack is mounted to the electric tool, the first clamping area is contacted with the tool terminal first, and then the second clamping area is contacted with the tool terminal.

3. The battery pack according to claim 2, wherein:

the first outer connecting piece, the first inner connecting piece, the second outer connecting piece is perpendicular in the second direction interval setting of first direction.

4. The battery pack according to claim 2, wherein:

the first terminal piece comprises a first connecting piece, and the first connecting piece is connected with the first outer connecting piece and the first inner connecting piece;

the second terminal plate includes a second connecting member connecting the second outer connecting member and the second inner connecting member.

5. The battery pack according to claim 1, wherein:

the battery pack further includes:

a circuit board for fixing the connection terminal;

the first terminal piece further includes: at least one first support leg extending downwardly from the first outer connector for connection with the circuit board to secure the first terminal blade;

the second terminal piece further includes: and at least one second supporting leg extending downward from the second external connection member to be connected with the circuit board so as to fix the second terminal plate.

6. The battery pack according to claim 5, wherein:

the length of the first support leg in the first direction is less than the length of the first outer connector;

the length of the second supporting leg in the first direction is smaller than the length of the second outer connecting piece.

7. The battery pack according to claim 4, wherein:

the first connector is disposed away from the first outer leg and the first inner leg in the first direction.

8. The battery pack according to claim 4, wherein:

the first connector is adjacent to the upper side of the housing.

9. The battery pack according to claim 4, wherein:

the second connector is adjacent to the underside of the housing.

10. The battery pack according to claim 1, wherein:

the first terminal piece is integrally formed;

the second terminal piece is integrally formed.

11. A battery pack and power tool combination comprising:

the electric tool comprises a tool main body, a tool interface and a tool matching part, wherein the tool interface and the tool matching part are arranged on the tool main body; a kind of electronic device with high-pressure air-conditioning system

The battery pack is provided with a battery pack interface and a battery pack combining part, the battery pack interface is arranged to be matched with the tool interface to supply power for the electric tool, and the battery pack combining part can be detachably connected with the tool matching part;

the battery pack further includes:

a housing;

a battery pack interface formed at an upper side of the housing for detachably connecting the battery pack to the electric tool in a first direction; one side of the shell away from the upper side is the lower side;

the connection terminal includes:

wherein,