CN107919445B - Battery pack assembly and garden tool with same - Google Patents
Battery pack assembly and garden tool with same Download PDFInfo
- Publication number
- CN107919445B CN107919445B CN201610887098.6A CN201610887098A CN107919445B CN 107919445 B CN107919445 B CN 107919445B CN 201610887098 A CN201610887098 A CN 201610887098A CN 107919445 B CN107919445 B CN 107919445B
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- China
- Prior art keywords
- battery
- battery pack
- fan
- opening
- garden tool
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Links
- 238000009423 ventilation Methods 0.000 claims description 38
- 238000004891 communication Methods 0.000 claims description 6
- 239000012792 core layer Substances 0.000 claims 3
- 238000010413 gardening Methods 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 description 15
- 230000006872 improvement Effects 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery pack assembly and a gardening tool with the same. The battery pack assembly is simple in structure, and can effectively reduce the temperature of the battery pack, so that the use efficiency of the battery pack is improved.
Description
Technical Field
The invention relates to a battery pack assembly and a gardening tool with the same.
Background
Currently, in order to realize the normal operation of a machine, a direct current gardening tool, such as a hand-push mower, a grass raking machine and the like, needs to be matched with a battery pack.
Taking a direct current mower as an example, when the direct current mower mows in a weather with a high temperature, the service temperature of the battery pack is also high. This not only gives the user a potential hazard, but also gives the user a bad experience, for example, the battery pack is too hot to trigger the temperature protection mechanism of the battery pack, and the battery pack cannot normally supply power.
Disclosure of Invention
The invention aims to provide a battery pack assembly and a gardening tool with the same, which can effectively reduce the temperature of the battery pack, thereby improving the use efficiency of the battery pack.
In order to achieve the above object, an embodiment of the present invention provides a battery pack assembly, which includes a battery pack and a battery chamber for accommodating the battery pack, and further includes a fan disposed in the battery chamber and adjacent to the battery pack.
As a further improvement of an embodiment of the present invention, the battery compartment includes an opening for assembling/disassembling the battery pack, and the fan and the opening are located at opposite sides of the battery pack when the battery pack is located in the battery compartment.
As a further improvement of an embodiment of the present invention, the battery chamber includes a battery pack accommodating portion accommodating the battery pack and a fan accommodating portion accommodating the fan, the battery pack accommodating portion and the fan accommodating portion are in communication with each other, the battery pack accommodating portion includes the opening, the fan accommodating portion is located at a side of the battery pack accommodating portion away from the opening, and the fan accommodating portion includes a through hole communicating with an outside of the battery chamber.
As a further improvement of an embodiment of the present invention, the battery pack includes at least two parallel battery cell layers, each battery cell layer includes a plurality of battery cells, a first gap is provided between two adjacent battery cell layers, the minimum value of the first gap is 1mm to 3mm, and the opening, the first gap and the fan form a first ventilation path.
As a further improvement of one embodiment of the invention, the minimum value of the first gap is 1.8 mm-3 mm.
As a further improvement of an embodiment of the present invention, the minimum value of the first gap is 2.5mm.
In order to achieve the above object, an embodiment of the present invention provides a gardening tool, including a housing and a battery pack assembly according to any one of the above technical solutions, where the battery cavity is located in the housing.
As a further improvement of an embodiment of the present invention, the gardening tool further includes a battery cavity cover, the battery cavity cover is used for closing the battery cavity, the housing includes a first housing portion and a second housing portion, the battery cavity cover is connected with the first housing portion through a rotating shaft, when the battery cavity cover closes the battery cavity, an air supply channel is formed between one end of the battery cavity cover, which is far away from the rotating shaft, and the second housing portion, and the air supply channel includes at least one "L" -shaped tortuous channel.
As a further improvement of an embodiment of the present invention, the battery chamber includes an opening for assembling/disassembling the battery pack and a bottom opposite to the opening, and a distance between a lowest point of the opening and the horizontal surface is larger than a distance between a lowest point of the bottom and the horizontal surface when the gardening tool is placed on the horizontal surface.
As a further improvement of an embodiment of the present invention, the battery cavity includes a first electrical connection portion, and the battery pack includes a second electrical connection portion that is mutually mated with the first electrical connection portion; when the gardening tool is placed on a horizontal plane, the first electric connection part is positioned on one side surface of the battery cavity, which is far away from the horizontal plane.
Compared with the prior art, the invention has the beneficial effects that: the battery pack assembly of the embodiment of the invention has a simple structure, and can effectively reduce the temperature of the battery pack, thereby improving the use efficiency of the battery pack.
Drawings
FIG. 1 is a cross-sectional view of a garden tool, according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the area of FIG. 1;
fig. 3 is a schematic view of a garden tool without a battery pack according to an embodiment of the present invention;
fig. 4 is a cross-sectional view showing a state in which a garden tool battery pack, according to an embodiment of the present invention, is not assembled;
FIG. 5 is an enlarged view of a portion of the area of FIG. 4;
FIG. 6 is a simplified schematic diagram of a garden tool, according to an embodiment of the present invention;
fig. 7 is a partial sectional view of a battery pack-in-state according to an embodiment of the present invention;
FIG. 8 is an enlarged view of a portion of the area of FIG. 7;
fig. 9 is a cross-sectional view of a battery pack according to an embodiment of the present invention;
fig. 10 is an enlarged view of a portion of the area of fig. 9.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
To clearly illustrate the location and orientation described within this invention, terms such as "upper," "lower," and the like, used herein to refer to spatially relative locations are used for ease of illustration to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, an embodiment of the present invention provides a garden tool 100, and the garden tool 100 includes a battery pack assembly 10, a housing 20, and a motor 30 and a control board 40 inside the housing 20. The garden tool 100 may be a lawnmower, a grass trimmer, a grass rake, or the like.
In this embodiment, taking the garden tool 100 as a mower as an example, the garden tool 100 further comprises a cutting blade 50 driven to rotate by the motor 30, a roller 70 rotatably arranged below the casing 20, and a push rod 80 arranged above the casing 20 for pushing by a user.
In this embodiment, the battery pack assembly 10 is located within the housing 20.
Referring to fig. 2 and 3, the battery pack assembly 10 includes a battery pack 11 and a battery chamber 12 accommodating the battery pack 11.
The battery pack assembly 10 further includes a fan 13 positioned within the battery cavity 12 and disposed adjacent to the battery pack 11.
Here, when the temperature of the battery pack 11 is too high, the heat dissipation of the battery pack 11 can be assisted by the action of the fan 13, so that the temperature of the battery pack 11 is effectively reduced, and the situation that the battery pack 11 is too high to bring potential danger to a user or bring bad experience to the user is avoided.
In this embodiment, the fan 13 may be a centrifugal fan or an axial fan, and the fan 13 may be directly or indirectly powered by the battery pack 11.
In addition, the fan 13 is connected to the control board 40, the battery pack assembly 10 further includes a temperature sensor (not shown) connected to the control board 40, and when the temperature sensor senses that the temperature of the battery pack assembly 10 exceeds a threshold value, the control board 40 controls the fan 13 to operate, and the control board 40 can control the rotation speed of the fan 13 according to the temperature of the battery pack assembly 10, etc.
In other embodiments, the fan 13 may be continuously operated at a constant speed or a variable speed to achieve continuous cooling of the battery pack 11.
In the present embodiment, the battery cavity 12 is surrounded by the inner area of the casing 20, and the battery cavity 12 is disposed in an inclined manner as a whole, so as to facilitate the assembly/disassembly process of the battery pack 11.
That is, in combination with fig. 4 to 5, the battery chamber 12 includes an opening 121 for assembling/disassembling the battery pack 11 and a bottom 122 opposite to the opening 121, and when the garden tool 100 is placed on the horizontal plane a, a distance D1 between the lowest point of the opening 121 and the horizontal plane a is greater than a distance D2 between the lowest point of the bottom 122 and the horizontal plane a, and at this time, the battery chamber 12 is inclined upward and rightward, facilitating the assembling/disassembling process of the battery pack 11.
In the present embodiment, the battery chamber 12 includes a first electrical connection portion 1252, and the battery pack 11 includes a second electrical connection portion 1251 that is coupled to the first electrical connection portion 1252.
When the garden tool 100 is placed in the horizontal plane a, the first electrical connection 1252 is located at a side of the battery chamber 12 away from the horizontal plane a.
In a specific example, the battery cavity 12 is substantially rectangular, but not limited thereto.
Referring to fig. 6, the battery cavity 12 includes a first inner surface 123, a second inner surface (not labeled), a third inner surface 124 and a fourth inner surface (not labeled) connected to the opening 121 and the bottom 122 in sequence, the third inner surface 124 is located at a side of the first inner surface 123 away from the horizontal plane a, a second electrical connection portion 1251 is formed on the third inner surface 124, and the outer surface of the battery pack 11 has a first electrical connection portion 1252 mutually matched with the second electrical connection portion 1251.
Here, the first inner surface 123 is defined as an inner surface below the battery chamber 12, the third inner surface 124 is defined as an inner surface above the battery chamber 12, and the second inner surface and the fourth inner surface are connected to both ends of the first inner surface 123 and the third inner surface 124, respectively.
Thus, when water is supplied into the battery chamber 12, the water flows toward the lower left corner (i.e., the bottom 122 direction) along the first inner surface 123, and the first and second electrical connection portions 1252 and 1251 are not affected.
Of course, the first electrical connection portion 1252 and the second electrical connection portion 1251 may be disposed in other areas, which is not limited to the above description.
In the present embodiment, when the battery pack 11 is positioned in the battery chamber 12, the fan 13 and the opening 121 are positioned at opposite sides of the battery pack 11.
Specifically, the battery chamber 12 includes a battery pack accommodating portion 1201 for accommodating the battery pack 11 and a fan accommodating portion 1202 for accommodating the fan 13, the battery pack accommodating portion 1201 and the fan accommodating portion 1202 are in communication with each other, the battery pack accommodating portion 1201 includes the opening 121, and the fan accommodating portion 1202 is located on a side of the battery pack accommodating portion 1201 away from the opening 121.
Here, the periphery of the intersection of the battery pack accommodating portion 1201 and the fan accommodating portion 1202 is a separation structure, the middle part is a hollow structure, the battery pack 11 is directly limited in the battery pack accommodating portion 1201, and the fan 13 is directly limited in the fan accommodating portion 1202, so that the independent limiting functions of the battery pack accommodating portion 1201 and the fan accommodating portion 1202 can be realized, the mutual conduction of the battery pack accommodating portion 1201 and the fan accommodating portion 1202 can be ensured, and the fan 13 can directly act on the battery pack 11.
In this embodiment, the fan housing 1202 further includes a through hole 1203 that communicates with the outside of the battery chamber 12.
In actual use, the inside of the garden tool 100 is formed with a slit communicating with the outside of the garden tool 100, and the through hole 1203 communicates with the outside of the garden tool 100 through the slit, and in this embodiment, the slit of the garden tool 100 is located in the lower area of the garden tool 100.
The battery pack accommodating portion 1201 communicates with the outside of the battery pack assembly 10 through the opening 121, and the battery pack accommodating portion 1201 communicates with the outside of the garden tool 100 substantially through the opening 121.
Specifically, referring to fig. 7 and 8, the gardening tool 100 further includes a battery cavity cover 90, the battery cavity cover 90 is used for closing the battery cavity 12, and the battery cavity cover 90 is provided with an air supply channel S that is mutually communicated with the battery cavity 12.
The air supply channel S may be directly formed on the battery cavity cover 90, or the battery cavity cover 90 and other structures cooperate to form the air supply channel S, but not limited thereto.
The battery cavity cover 90 is detachably connected to the casing 20, but is not limited thereto.
In the present embodiment, the battery chamber cover 90 is rotatably connected to the housing 20 through a rotation shaft 21, and the battery chamber cover 90 is used to open/close the battery chamber 12.
The opening 121 of the battery chamber 12 is disposed near the battery chamber cover 90, and when the battery chamber cover 90 opens the battery chamber 12, the opening 121 is exposed, and at this time, a user can perform the assembly/disassembly process of the battery pack 11.
In the present embodiment, the battery cavity cover 90 is not disposed closely to the opening 121 of the battery cavity 12, and when the battery pack 11 is loaded into the battery cavity 12 and the battery cavity cover 90 closes the battery cavity 12, there is substantially a space between the battery cavity cover 90 and the battery pack 11.
In this embodiment, the casing 20 includes a first casing portion 22 and a second casing portion 23 connected to the battery cavity cover 90, the battery cavity cover 90 is connected to the first casing portion 22 through a rotation shaft 21, the second casing portion 23 is located in a lower area of the first casing portion 22, when the battery cavity cover 90 closes the battery cavity 12, the air supply channel S is formed between an end of the battery cavity cover 90 away from the rotation shaft 21 and the second casing portion 23, and the air supply channel S is in communication with the opening 121, so that the battery pack accommodating portion 1201 is in communication with the outside of the garden tool 100.
The air supply channel S comprises at least one L-shaped tortuous channel.
Here, referring to fig. 8, the second case portion 23 is formed with a first blocking portion 231, the battery cavity cover 90 is formed with a second blocking portion 91, and when the battery cavity cover 90 closes the battery cavity 12, the first blocking portion 231 and the second blocking portion 91 cooperate with each other to form the "L" type meandering path at the air supply path S.
Specifically, the second shell portion 23 is partially bent upward to form a bent portion (i.e., the first blocking portion 231), and the end of the battery cavity cover 90 away from the rotating shaft 21 is downwardly protruded to form a baffle (i.e., the second blocking portion 91), so that when the battery cavity cover 90 closes the battery cavity 12, the first blocking portion 231 and the second blocking portion 91 partially overlap, i.e., a channel formed between the first blocking portion 231 and the second blocking portion 91 is "L" shaped.
When air needs to enter/exit the air supply channel S, the air needs to pass through the "L" type tortuous path, and the first blocking portion 231 and the second blocking portion 91 are disposed, so that on one hand, external foreign matters/water can be prevented from entering the battery cavity cover 91 from the air supply channel S, and on the other hand, the first blocking portion 231 and the second blocking portion 91 realize double blocking, so that the air can smoothly enter and exit the air supply channel S.
In addition, the battery cavity cover 90 includes a cavity cover body 901 and an extension portion 902 that are connected to each other, the cavity cover body 901 is connected to the first shell portion 22, the extension portion 902 is located on a side of the cavity cover body 901 away from the first shell portion 22, and the extension portion 902 is bent toward a side away from the garden tool 100 relative to the cavity cover body 901.
That is, the battery cavity cover 90 has an outwardly bent structure at its end, and the bent structure is provided to prevent foreign matters/water from outside from falling into the air supply passage S from above.
In the present embodiment, with continued reference to fig. 7 and 8, the battery pack 11 includes a plurality of battery cells 111, a first gap P1 is provided between the plurality of battery cells 111, and the opening 121 of the battery cavity 12, the first gap P1 and the fan 13 form a first ventilation path S1.
Here, the first ventilation path S1 substantially means a passage formed by the air supply passage S, the opening 121, the first gap P1, the fan 13, and the through hole 1203.
In a specific example of the present embodiment, referring to fig. 9 and fig. 10, each of the battery cell layers 111 includes a plurality of battery cells 1111, and taking a case that the plurality of battery cell layers 111 includes a first battery cell layer 111a and a second battery cell layer 111b disposed in parallel, a first gap P1 is formed between the first battery cell layer 111a and the second battery cell layer 111 b.
The first cell layer 111a includes a plurality of first cells 1111a, and the first cells 1111a are cylindrical cells, for example, the cross section of the first cells 1111a is circular, but not limited thereto.
The plurality of first cells 1111a are substantially aligned in a straight line, and there is no gap between adjacent first cells 1111 a.
The plurality of first cells 1111a are arranged in a substantially straight line, which means that the line connecting the centers of the plurality of first cells 1111a is a straight line.
In addition, the radii of the first cells 1111a are substantially equal, but not limited thereto.
The first cell layer 111a includes only one first cell 1111a in the thickness direction thereof, that is, the thickness of the first cell layer 111a is substantially equal to the diameter of the first cell 1111 a.
The second battery cell layer 111b includes a plurality of second battery cells 1111b, and the descriptions of the second battery cell layer 111b and the second battery cell 1111b may refer to the descriptions of the first battery cell layer 111a and the first battery cell 1111a, which are not repeated here.
Here, the radii of the first cell 111a and the second cell 111b are the same, but not limited thereto.
In this example, the first gap P1 between the first cell layer 111a and the second cell layer 111b is a wavy gap and is a non-equidistant gap.
The minimum value of the first gap P1 between the first cell layer 111a and the second cell layer 111b is 1 mm-3 mm.
Here, the minimum value of the first gap P1 refers to the minimum distance between the point on the first cell 1111a and the point on the second cell 1111b of the adjacent second cell layer 111 b.
That is, the minimum value of the first gap P1 is defined as the difference obtained by subtracting the radius of the first cell 1111a from the radius of the second cell 1111b from the distance between the center of the first cell 1111a and the center of the adjacent second cell 111 b.
In addition, the minimum value of the first gap P1 in this example is preferably 1.8mm to 3mm, and most preferably, the minimum value of the first gap P1 is 2.5mm.
Here, if the first clearance P1 is too small, the ventilation amount inside the battery pack 11 is insufficient, affecting the heat radiation efficiency; if the first gap P1 is too large, on the one hand, the wind speed will be reduced, which affects the heat dissipation efficiency, and on the other hand, only the cold air close to the battery cell layer 111 can take away more heat, while the cold air close to the middle of the first gap P1 cannot take away enough heat due to being far away from the battery cell layer 111, which results in low cold air utilization rate and affects the heat dissipation efficiency.
In this example, the propagation direction of the first ventilation path S1 in the first gap P1 is perpendicular to the axial direction of the cell 1111.
Here, the ventilation path in the first gap P1 is substantially curved, and for convenience of description, the propagation direction of the first ventilation path S1 in the first gap P1 is defined as a vector pointing from a position entering the first gap P1 to a position leaving the first gap P1, the vector being a straight line.
In this embodiment, the battery pack 11 further includes a battery case 112 covering the plurality of battery cell layers 111, and the battery case 112 has a plurality of ventilation holes (not labeled) thereon, and the plurality of ventilation holes are located at least on the first ventilation path S1.
Here, the battery pack 11 is exemplified as a substantially rectangular parallelepiped, that is, the battery pack 11 and the battery chamber 12 are matched with each other at this time.
When the battery pack 11 is mounted in the battery cavity 12, the battery pack 11 includes a front end surface 113 corresponding to the opening 121, a rear end surface 114 opposite to the front end surface 113, a first end surface 115, a second end surface (not shown), a third end surface 116, and a fourth end surface (not shown) connecting the front end surface 113 and the rear end surface 114.
A plurality of ventilation holes are preferably provided on the front end face 113 and the rear end face 114 so as to allow the cold air of the first ventilation path S1 to pass through. Of course, in other embodiments, the first end surface 115, the second end surface, the third end surface 116, and the fourth end surface may be provided with ventilation holes, and the positions and the number of ventilation holes are not limited.
In the present embodiment, a second gap P2 is formed between the battery case 112 and the plurality of battery cells 111, and the opening 121 of the battery cavity 12, the second gap P2, and the fan 13 form a second ventilation path S2.
Here, the second ventilation path S2 substantially means a passage formed by the air supply passage S, the opening 121, the second gap P2, the fan 13, and the through hole 1203.
In the present embodiment, when the battery pack 11 is located in the battery chamber 12, a third gap P3 is provided between the battery pack 11 and the battery chamber 12, and the opening 121 of the battery chamber 12, the third gap P3, and the fan 1203 form a third ventilation path S3.
Here, the third air passage S3 is substantially a passage formed by the air supply passage S, the opening 121, the third gap P3, the fan 13, and the through hole 1203.
The inner surface of the battery cavity 12 and/or the outer surface of the battery pack 11 are formed with a mating portion (not shown) for restricting the relative positions of the battery cavity 12 and the battery pack 11 to form the third gap P3.
Specifically, the inner surface of the battery cavity 12 and/or the outer surface of the battery pack 11 are formed with a concave-convex structure, when the battery pack 11 is placed in the battery cavity 12, the outer surface of the battery pack 11 is not in contact with the inner surface of the battery cavity 12 and a gap is left between the outer surface and the inner surface of the battery cavity 12 due to the limitation of the concave-convex structure, and the gap can allow the cold air to pass through.
As described above, in the present embodiment, the gardening tool 100 includes the first ventilation path S1, the second ventilation path S2 and the third ventilation path S3, and the temperature inside and outside the battery pack 11 can be effectively reduced through the ventilation process of the three ventilation paths.
In the present embodiment, when the fan 13 is in the air suction operation, cool air having a low temperature outside the garden tool 100 enters the inside of the garden tool 100 through the air supply passage S.
Here, a part of the cool air enters the inside of the battery pack 11 from the vent hole of the front end face 113 (or the vent hole of the other end face) of the battery pack 11, the cool air cools the respective battery cells 1111 and the battery case 112 through the first ventilation path S1 and the second ventilation path S2, the cool air is gradually changed into hot air, and the hot air is sucked to the fan 13 from the vent hole of the rear end face 114 (or the vent hole of the other end face) of the battery pack 11, and the fan 13 discharges the hot air from the through hole 1203 to the outside of the garden tool 100; another part of the cool air is changed into hot air through the third ventilation path S3 and sucked to the fan 13, and the fan 13 discharges the hot air from the through hole 1203 to the outside of the garden tool 100.
When the fan 13 is in the blowing operation, cool air having a low temperature outside the garden tool 100 enters the inside of the garden tool 100 through the through hole 1203 of the fan housing 1202.
Here, the fan 13 blows a part of cool air into the battery pack 11 from the vent hole of the upper rear end surface 114 (or the vent hole of the other end surface) of the battery pack 11, cools the respective battery cells 1111 and the battery case 112 through the first ventilation path S1 and the second ventilation path S2, gradually changes the cool air into hot air, and discharges the hot air from the vent hole of the front end surface 113 (or the vent hole of the other end surface) of the battery pack 11, and then discharges the hot air from the air supply passage S to the outside of the garden tool 100; the fan 13 changes another part of the cool air into hot air through the third ventilation path S3 and blows the hot air to the air supply path S, and discharges the hot air to the outside of the garden tool 100 through the air supply path S.
It should be noted that, since the fan 13 is disposed opposite to the opening 121 of the battery cavity 12, the cooling air propagation path can completely cover the entire battery pack 11, and the heat dissipation effect is excellent.
In the present embodiment, the first ventilation path S1, the second ventilation path S2, and the third ventilation path S3 are separated from the control board 40, the motor 30, and the like. The first ventilation path S1 is a main heat dissipation path, the second ventilation path S2 and the third ventilation path S3 are auxiliary heat dissipation paths, and here, in order to reduce the overall volume of the battery pack assembly 10, the second ventilation path S2 and the third ventilation path S3 may be appropriately reduced or omitted, but not limited thereto.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. Battery package assembly (10), battery package assembly (10) includes battery package (11) and holds battery chamber (12) of battery package (11), its characterized in that, battery package assembly (10) still includes being located battery chamber (12) is interior and adjacent fan (13) that battery package (11) set up, battery chamber (12) include one be used for assembling/dismantle opening (121) of battery package (11), when battery package (11) are located in battery chamber (12), fan (13) with opening (121) are located battery package (11) 'S opposite side, battery package (11) include at least two parallel arrangement' S electric core layer (111), each electric core layer (111) include a plurality of electric core (1111), have first clearance (P1) between two adjacent electric core layers (111), opening (121), first clearance (P1) and fan (13) form first clearance (S1) in first axial direction ventilation route (S1) and electric core (1111) each other perpendicular to ventilation route (S1).
2. The battery pack assembly (10) according to claim 1, wherein the battery chamber (12) includes a battery pack accommodating portion (1201) accommodating the battery pack (11) and a fan accommodating portion (1202) accommodating the fan (13), the battery pack accommodating portion (1201) and the fan accommodating portion (1202) are in communication with each other, the battery pack accommodating portion (1201) includes the opening (121), the fan accommodating portion (1202) is located on a side of the battery pack accommodating portion (1201) away from the opening (121), and the fan accommodating portion (1202) includes a through hole (1203) in communication with an outside of the battery chamber (12).
3. The battery pack assembly (10) of claim 1, wherein the first gap (P1) has a minimum value of 1mm to 3mm.
4. The battery pack assembly (10) according to claim 3, wherein the first gap (P1) has a minimum value of 1.8mm to 3mm.
5. The battery pack assembly (10) of claim 4, wherein the first gap (P1) has a minimum value of 2.5mm.
6. A garden tool (100), characterized by comprising a housing (20) and a battery pack assembly (10) according to any of claims 1-5, said battery cavity (12) being located within said housing (20).
7. The garden tool (100) according to claim 6, wherein the garden tool (100) further comprises a battery cavity cover (90), the battery cavity cover (90) is used for closing the battery cavity (12), the housing (20) comprises a first housing part (22) and a second housing part (23), the battery cavity cover (90) is connected with the first housing part (22) through a rotating shaft (21), and when the battery cavity cover (90) closes the battery cavity (12), an end of the battery cavity cover (90) away from the rotating shaft (21) and the second housing part (23) form the air supply channel (S), and the air supply channel (S) comprises at least one "L" -shaped zigzag channel.
8. The garden tool (100) according to claim 6, wherein the battery chamber (12) comprises an opening (121) for assembling/disassembling the battery pack (11) and a bottom (122) opposite to the opening (121), and wherein a distance (D1) between a lowest point of the opening (121) and the horizontal plane (a) is larger than a distance (D2) between a lowest point of the bottom (122) and the horizontal plane (a) when the garden tool (100) is placed on the horizontal plane (a).
9. The garden tool (100) according to claim 6, wherein the battery cavity (12) comprises a first electrical connection (1252), the battery pack (11) comprising a second electrical connection (1251) that mates with the first electrical connection (1252); when the garden tool (100) is placed in a horizontal plane (a), the first electrical connection (1252) is located at a side of the battery cavity (12) remote from the horizontal plane (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610887098.6A CN107919445B (en) | 2016-10-11 | 2016-10-11 | Battery pack assembly and garden tool with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610887098.6A CN107919445B (en) | 2016-10-11 | 2016-10-11 | Battery pack assembly and garden tool with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107919445A CN107919445A (en) | 2018-04-17 |
| CN107919445B true CN107919445B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610887098.6A Active CN107919445B (en) | 2016-10-11 | 2016-10-11 | Battery pack assembly and garden tool with same |
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| Country | Link |
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| CN (1) | CN107919445B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7046739B2 (en) | 2018-07-02 | 2022-04-04 | 本田技研工業株式会社 | Working machine |
| CN111492785B (en) * | 2020-04-26 | 2022-03-15 | 隆鑫通用动力股份有限公司 | Electric mower |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993078A (en) * | 2015-08-03 | 2015-10-21 | 江苏绿伟锂能有限公司 | Lithium battery module for gardening tool |
| CN204834797U (en) * | 2015-08-31 | 2015-12-02 | 宁波动一电器有限公司 | Garden instrument |
| CN206422108U (en) * | 2016-10-11 | 2017-08-18 | 天佑电器（苏州）有限公司 | Battery pack assembly and the garden instrument with it |
-
2016
- 2016-10-11 CN CN201610887098.6A patent/CN107919445B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993078A (en) * | 2015-08-03 | 2015-10-21 | 江苏绿伟锂能有限公司 | Lithium battery module for gardening tool |
| CN204834797U (en) * | 2015-08-31 | 2015-12-02 | 宁波动一电器有限公司 | Garden instrument |
| CN206422108U (en) * | 2016-10-11 | 2017-08-18 | 天佑电器（苏州）有限公司 | Battery pack assembly and the garden instrument with it |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107919445A (en) | 2018-04-17 |
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