CN219759730U - Battery pack and electric tool - Google Patents

Abstract

The utility model discloses a battery pack and an electric tool. The battery pack comprises a shell and a plurality of battery cell groups arranged in the shell, at least one blind window part is arranged on the shell, the blind window part comprises a plurality of first barrier strips arranged at intervals, a through groove is formed between every two adjacent first barrier strips, a second barrier strip is arranged in at least part of the through groove, the second barrier strip comprises a protruding part protruding out of the surface of the shell and a recessed part embedded into the shell, an air inlet is formed between the first barrier strip and the second barrier strip, and external air flows into the shell through the air inlet to dissipate heat of the battery cell groups. In the direction of front view darkwindow portion, the air intake is hidden through the cooperation of first blend stop and second blend stop to on the basis of promoting outward appearance integrality, improve the intake and reduce the suction volume of dust, the bellying can be when the battery package is placed as the supporting point, reduces the wearing and tearing of battery package casing.

Description

Battery pack and electric tool

Technical Field

The utility model relates to the field of electric energy storage devices, in particular to a battery pack and an electric tool.

Background

With rapid development of technology, the application field of battery packs is becoming more and more widespread, and hand-held electric tools and garden appliances using rechargeable electric cores are widely used in factories, farms, and home use. Because of the internal resistance of the rechargeable battery cells, heat can be generated when the rechargeable battery cells are charged and discharged, and the rechargeable battery cells are compactly packaged in the shell of the battery pack, the heat can be concentrated in the shell, the battery cell framework and other places, and the efficiency and the service life of the battery pack are affected. Therefore, it is necessary to perform timely and effective heat dissipation of the battery pack.

At present, the conventional heat dissipation mode of the battery pack is as follows: the heat is dissipated by convection of the gas, and the heat is conducted out of the battery pack by the heat sink, and then the temperature is reduced by convection of the surrounding air. The existing battery pack is generally provided with a heat dissipation opening on a shell of the battery pack, external air flows into the shell through the heat dissipation opening, but dust can enter the shell from the heat dissipation opening and accumulate on the battery cell group along with time, so that poor contact between the battery cell and the nickel plate is caused, and normal use of the battery pack is affected.

Disclosure of Invention

An object of the present utility model is to provide a battery pack to achieve an increase in the amount of air intake while reducing the entry of dust and the like into the inside of the battery pack and to reduce the abrasion of the case when the battery pack is placed.

Another object of the present utility model is to provide a power tool.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a battery package, includes the casing and sets up a plurality of electric core groups in the casing, be provided with at least one blind window portion on the casing, the blind window portion includes the first blend stop that a plurality of intervals set up, adjacent two form logical groove between the first blend stop, at least part be provided with the second blend stop in the logical groove, the second blend stop including protruding in the bellying on casing surface with the embedding concave part in the casing, first blend stop with form the air intake between the second blend stop, outside air current accessible the air intake flows into inside the casing, right electric core group dispels the heat.

Preferably, a gap between the concave portion and the first barrier rib in the height direction of the battery pack is the air inlet, and the air inlet is positioned on the left side and the right side above the concave portion and below the first barrier rib.

As another preference, the length of the recess is not less than two-thirds of the total length of the second barrier strip.

Further preferably, the engagement portions of the convex portion and the concave portion are configured as inclined surfaces so that an external air flow can flow along the inclined surfaces toward the concave portion.

Further, the width of the second barrier strip is not larger than the width of the through groove.

Further, the protruding parts protrude from the surface of the case, and the plurality of protruding parts are adapted to contact with the placement plane to form a support plane, and when the battery pack is placed on the placement plane, the surface of the case is spaced apart from the placement plane by a certain distance.

Further, two blind window portions are arranged on the shell, the two blind window portions are symmetrically arranged on the shell along the axis of the width direction of the battery pack, and a plurality of first barrier strips belonging to the same blind window portion are arranged along the width direction of the battery pack.

Further, the protruding portion is arranged on one side, close to the end face of the battery pack, of the second barrier strip.

Further, a heat dissipation hole is further formed in the shell, external air flow flowing in from the air inlet can flow out of the heat dissipation hole so as to take away heat generated during charging and discharging of the battery cell, and a dust screen is arranged on one side, close to the battery cell, of the heat dissipation hole.

Another aspect of the present utility model provides a power tool including the above battery pack.

Compared with the prior art, the utility model has the beneficial effects that:

the hidden window part comprises a plurality of first barrier strips arranged at intervals, a through groove is formed between two adjacent first barrier strips, a second barrier strip is arranged in the through groove, an air inlet is formed between the first barrier strip and the second barrier strip, external air can flow into the shell through the air inlet, meanwhile, dust can be well reduced from entering the shell through the cooperation between the second barrier strip and the air inlet, the cleaning frequency of the battery pack shell is reduced, and the convenience of users is improved; the second blend stop includes protruding portion and the concave part in the embedding casing in casing surface, and the supporting point when the bellying can be placed as the battery package, and the bellying is suitable for and places the plane contact and form a supporting plane promptly to make the casing surface and place the interval certain distance between the plane, thereby can avoid the casing to lead to the casing wearing and tearing with placing the plane contact.

Drawings

FIG. 1 is a schematic view of a battery pack according to the present utility model;

FIG. 2 is a schematic view of a battery pack according to another embodiment of the present utility model;

FIG. 3 is a schematic view of a cross section of a blind window portion along a length direction of a battery pack according to the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic view of a cross section of a blind window portion along a width direction of a battery pack in the present utility model;

FIG. 6 is a partial enlarged view at B in FIG. 4;

fig. 7 is a side view of a battery pack according to the present utility model.

In the figure: 1. a housing; 11. a heat radiation hole; 12. a decoration piece; 2. a bracket; 3. a cell group; 31. a battery cell; 4. a blind window portion; 41. a first barrier strip; 42. a second barrier strip; 421. a boss; 422. a recessed portion; 423. an inclined plane; 43. an air inlet; 44. an air inlet channel; 45. and (5) through grooves.

Detailed Description

The present utility model will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present utility model, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 7, the present embodiment provides a battery pack that can be applied to a medium-sized or large-sized garden tool such as an electric mower, a grass trimmer, an electric scissors, a pruning machine, an electric saw, etc., and that supplies electric power to the garden tool. The battery pack specifically comprises a shell 1 and a plurality of battery cell groups 3 arranged in the shell 1, wherein each battery cell group 3 comprises a plurality of battery cells 31 which are arranged at intervals, and brackets 2 used for fixing the battery cells 31 are arranged at two ends of each battery cell 31. The bottom of the shell 1 is provided with at least one hidden window part 4, the hidden window part 4 is of a grid-shaped structure arranged on the surface of the shell 1, external air flow can enter the shell 1 through an air inlet 43 in the hidden window part 4, and the air inlet 43 is hidden in the direction of the front view hidden window part 4. Specifically, the blind window portion 4 includes a plurality of first barrier strips 41 that the interval set up, form logical groove 45 between two adjacent first barrier strips 41, be provided with second barrier strip 42 in the logical groove 45, second barrier strip 42 has bellying 421 and depressed part 422, bellying 421 extends outward and is protruding in casing 1 surface, the depressed part 422 then imbeds inside casing 1, the both ends and the cell wall fixed connection of logical groove 45 of second barrier strip 42, bellying 421 is higher than first barrier strip 41 in the height direction of battery package, and the depressed part 422 is lower than first barrier strip 41 in the height direction of battery package, the interval between depressed part 422 and the first barrier strip 41 forms air intake 43, air intake 43 is located the left and right both sides above the depressed part 422, thereby when the user observes along the direction perpendicular to the terminal surface at blind window portion 4 place, air intake 43 can't be observed, air intake 43 is hidden under first barrier strip 41. An air inlet channel 44 is further arranged below the first barrier strip 41, the air inlet 43 is communicated with the air inlet channel 44, and external air flow can flow into the inner body through the air inlet 43 and the air inlet channel 44 to dissipate heat of each cell 31.

The air inlets 43 are located between the first barrier rib 41 and the second barrier rib 42, and the other first barrier ribs 41 are adjacent to the two second barrier ribs 42 except the first barrier rib 41 arranged at two ends of the blind window portion 4, so that the air inlet channel 44 arranged below the first barrier rib 41 can be communicated with the two air inlets 43, and the air inlet channel 44 has larger air inlet quantity. Compared with the air inlet 43 directly arranged on the surface of the shell 1, the air inlet 43 on the battery pack is hidden by the cooperation of the first barrier strip 41 and the second barrier strip 42 in the direction of the front view and the dark window 4 due to the arrangement of the dark window 4, the air inlet 43 cannot be observed by a user along the direction perpendicular to the end face of the dark window 4, the overall appearance of the battery pack is more complete and attractive, and the dark window 4 also enables the battery pack to have larger air inlet quantity. In addition, the width of the second barrier rib 42 is the same as that of the through groove 45, the second barrier rib 42 covers the through groove 45, and the second barrier rib 42 can serve as a blocking part to block dust moving along with air flow, so that the amount of dust entering the shell 1 is reduced, the cleaning frequency of the battery pack is reduced, and the convenience of users is improved.

In most cases, the width of the second barrier rib 42 is equal to or smaller than the width of the through groove 45, and if the width of the second barrier rib 42 is too large, a portion of the second barrier rib 42 extends into the air inlet channel 44, so that the flow area of the air inlet channel 44 is reduced, and a portion of the air flow flowing into the air inlet channel 44 from the air inlet 43 is blocked by the second barrier rib 42, so that the air flow entering the heat dissipation channel is reduced, and the heat dissipation performance of the battery pack is reduced due to the reduced air flow. In addition, the length of the recess 422 is not less than two-thirds of the length of the second barrier rib 42, since the air inlet 43 is formed between the recess 422 and the through slot 45, the size of the air inlet 43 is directly related to the size of the recess 422, and if the length of the recess 422 is too small, the length of the air inlet 43 is correspondingly reduced, so that the air flow into the housing 1 is reduced.

As shown in fig. 3-4, in the preferred embodiment, the engaging portions of the protruding portion 421 and the recessed portion 422 of the second barrier rib 42 are configured as inclined surfaces 423, so that the inclined surfaces 423 are more smoothly engaged when the battery pack is in use, the protruding portion 421 is in contact with the placement plane, the inclined surfaces 423 and the recessed portion 422 are in a trapezoid shape, external air flow can flow to the recessed portion 422 along the opening direction of the through groove 45, and external air flow can also flow to the recessed portion 422 along the inclined surfaces 423 to enter the air inlet 43, thereby improving the air intake and the air intake efficiency of the air inlet 43.

As shown in fig. 7, the upper surface of the boss 421 is higher than the case 1 and the decoration 12 provided on the case 1, when the battery pack is placed on the flat surface, the boss 421 may serve as a supporting point when the battery pack is placed, the boss 421 is adapted to contact with the placement flat surface to form a supporting plane, which is higher than the case 1 and the decoration 12 provided on the case 1, so that the case 1 and the decoration 12 are spaced apart from the placement flat surface by a certain distance, so that the case 1 and the decoration 12 are not in contact with the placement flat surface when the battery pack is placed, and abrasion of the case 1 and the decoration 12 due to contact of the case 1 and the decoration 12 with the placement flat surface is prevented. In addition, due to the arrangement of the second barrier rib 42, a certain distance is formed between the surface of the housing 1 and the placement plane, so that when dust and a small amount of accumulated water exist on the placement plane, the dust and the accumulated water can be prevented from directly entering the housing 1. In addition, due to the provision of the second barrier rib 42, the case 1 of the battery pack has better hydrophobicity when the battery pack is placed on a surface having a small amount of water accumulation, reducing water stain residue on the surface of the case 1.

In this embodiment, two blind window portions 4 are disposed on the housing 1, the two blind window portions 4 are symmetrically disposed on the housing 1 along the axis of the width direction of the battery pack, the protruding portions 421 on the second barrier strips 42 are disposed on the side of the second barrier strips 42 close to the end face of the battery pack, and the second barrier strips 42 belonging to the same blind window portion 4 are arranged along the width direction of the battery pack. When the battery pack is placed, each protruding portion 421 is contacted with the placement plane to form a support plane, the end face of each protruding portion 421 close to the battery pack is provided with a larger support area, and the battery pack is better in stability and not easy to turn over by external force when placed. In addition, in the process of placing the battery pack on the placement plane, since the protruding portion 421 of the second barrier rib 42 is arranged close to the end face of the battery pack, the protruding portion 421 can contact the placement plane earlier, and the surface abrasion of the shell 1 caused by the contact between the shell 1 and the placement plane in the process of placing the battery pack can be reduced; and because the protruding portions 421 are arranged at intervals along the width direction of the battery pack, a user has a larger placement angle when placing the battery pack, and does not need to deliberately find the placement angle.

The length of the protruding portion 421 of the second barrier rib 42 is not more than one third of the total length of the second barrier rib 42, the greater the length of the protruding portion 421, the better the stability of the battery pack when placed, but since the total length of the second barrier rib 42 is fixed, the length of the protruding portion 421 is increased to correspondingly reduce the length of the recess portion 422, the length of the air inlet 43 is in a proportional relationship with the length of the recess portion 422, and the longer the recess portion 422 is, the longer the length of the air inlet 43 is. Therefore, the length of the protruding portion 421 is not easy to be set too large, so that the too small length of the recessed portion 422 is avoided, the length of the air inlet 43 is too small, the air flow entering the housing 1 cannot meet the heat dissipation requirement of the battery cell group 3, and heat generated during charging and discharging of the battery cell group 3 cannot be removed in time, so that normal operation of the battery pack is affected. In this embodiment, the housing 1 of the battery pack is further provided with a heat dissipation hole 11, the heat dissipation hole 11 is in a waist-shaped hole shape, an included angle of 60 ° is formed between adjacent heat dissipation holes 11, external air flow flowing in from the air inlet 43 can flow out from the heat dissipation hole 11, and air flow absorbing heat generated by charging and discharging of the battery core 31 can be timely discharged out of the housing 1 from the heat dissipation hole 11. The side of the radiating hole 11, which is close to the battery cell 31, is also provided with a dust screen, dust and the like can be blocked outside the shell 1 by the dust screen, so that the situation that the battery cell 31 and a nickel plate are in poor contact and the use of a battery pack is affected due to the fact that the dust enters the shell 1 from the radiating hole 11 is avoided.

Another aspect of the present utility model provides a power tool including the above battery pack.

The foregoing has outlined the basic principles, features, and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a battery package, includes the casing and sets up a plurality of electric core group in the casing, its characterized in that, be provided with at least one blind window portion on the casing, the blind window portion includes the first blend stop that a plurality of intervals set up, adjacent two form logical groove between the first blend stop, at least part be provided with the second blend stop in the logical groove, the second blend stop including protruding in the bellying on casing surface and embedding the concave part in the casing, first blend stop with form the air intake between the second blend stop, outside air current accessible the air intake flows into inside the casing, right electric core group dispels the heat.

2. The battery pack of claim 1, wherein a gap between the recess and the first barrier rib in a height direction of the battery pack is the air inlet, and the air inlet is located on left and right sides above the recess and below the first barrier rib.

3. The battery pack of claim 2, wherein the recess has a length not less than two-thirds of the total length of the second barrier rib.

4. The battery pack of claim 3, wherein the engagement portions of the protrusions and the depressions are configured as inclined surfaces so that external air flow can flow along the inclined surfaces toward the depressions.

5. The battery pack of claim 1, wherein the width of the second barrier rib is not greater than the width of the through slot.

6. The battery pack of claim 1, wherein the protrusions protrude from a surface of the housing, and wherein a plurality of the protrusions are adapted to contact the placement plane to form a support plane, and wherein the surface of the housing is spaced apart from the placement plane when the battery pack is placed on the placement plane.

7. The battery pack according to claim 1, wherein two blind window portions are provided on the case, the two blind window portions are symmetrically provided on the case along an axis in a width direction of the battery pack, and a plurality of first barrier strips belonging to the same blind window portion are arranged in the width direction of the battery pack.

8. The battery pack of claim 7, wherein the boss is disposed on a side of the second barrier strip adjacent to the battery pack end face.

9. The battery pack according to claim 1, wherein the housing is further provided with a heat dissipation hole, an external air flow flowing in from the air inlet can flow out from the heat dissipation hole to take away heat generated when the battery cell is charged and discharged, and a dust screen is arranged on one side of the heat dissipation hole, which is close to the battery cell.

10. A power tool comprising a battery pack according to any one of claims 1-9.