Power tools and battery packs

Abstract

To cool a battery pack including an all-solid-state battery.SOLUTION: An electric tool 1 includes a motor 4, a battery pack 3, a tool fan 5, and a tool housing 20. The motor 4 has a motor shaft 41. The battery pack 3 has an all-solid-state battery 38 supplying power to the motor 4. The tool fan 5 operates on the basis of the rotation of the motor shaft 41. The tool housing 20 houses the motor 4 and the tool fan 5. The battery pack 3 has battery-side suction holes 321, 322. The battery-side suction holes 321, 322 suck air to the inner part of the battery pack 3 from the outer part of the battery pack 3. The tool housing 20 includes a tool-side exhaust hole 212 and a ventilation passage 222. The tool-side exhaust hole 212 exhausts the air in the tool housing 20 by the operation of the tool fan 5. The ventilation passage 222 is formed between the tool-side exhaust hole 212 and the battery-side suction holes 321, 322.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure generally relates to power tools and battery packs, and more particularly to power tools equipped with tool fans and battery packs attached to power tools equipped with tool fans.

Background Art

[0002] Patent Document 1 discloses a power tool including a power tool body having a mounting portion on the lower surface of a grip portion for mounting a battery pack, and a battery pack removably mounted on the power tool body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when a battery pack (battery pack) having an all-solid-state battery is used in a power tool, the battery pack may become hot during operation of the power tool as compared with the case where a battery pack having a lithium-ion battery is used in the power tool.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a power tool and a battery pack capable of cooling a battery pack having an all-solid-state battery.

Means for Solving the Problems

[0006] A power tool according to one aspect of the present disclosure comprises a motor, a battery pack, a tool fan, and a tool housing. The motor has a motor shaft. The battery pack has a solid-state battery that supplies power to the motor. The tool fan operates based on the rotation of the motor shaft. The tool housing houses the motor and the tool fan. The battery pack has a battery-side intake port. The battery-side intake port draws air from the outside of the battery pack into the inside of the battery pack. The tool housing has a tool-side exhaust port and a ventilation passage, Tool-side air intake port, tool-side shutter, The tool-side exhaust port exhausts the air inside the tool housing through the operation of the tool fan. The ventilation passage is formed between the tool-side exhaust port and the battery-side intake port. The tool-side air intake port draws the air exhausted from the battery pack into the ventilation passage. The tool-side shutter opens and closes the tool-side air intake port. The battery pack is configured to be detachable from the tool housing. The tool-side shutter is configured to close the tool-side air intake when the battery pack is removed from the tool housing, and to open the tool-side air intake when the battery pack is attached to the tool housing. .

[0007] A power tool according to one aspect of the present disclosure comprises a motor, a tool fan, and a tool housing. The motor has a motor shaft. The tool fan operates based on the rotation of the motor shaft. The tool housing houses the motor and the tool fan. The tool housing is configured to accommodate a battery pack. The battery pack has a solid-state battery that supplies power to the motor. The battery pack has a battery-side intake port. The battery-side intake port draws air from outside the battery pack into the battery pack. The tool housing has a tool-side exhaust port and a ventilation passage, Tool-side air intake port, tool-side shutter, The tool-side exhaust port exhausts the air inside the tool housing through the operation of the tool fan. The ventilation passage connects the tool-side exhaust port and the battery-side intake port when the battery pack is installed. The tool-side air intake port draws the air exhausted from the battery pack into the ventilation passage. The tool-side shutter opens and closes the tool-side air intake port. The battery pack is configured to be detachable from the tool housing. The tool-side shutter is configured to close the tool-side air intake port when the battery pack is removed from the tool housing and to open the tool-side air intake port when the battery pack is attached to the tool housing.

[0008] A battery pack according to one aspect of the present disclosure is configured to be detachably attached to a power tool. The power tool comprises a motor having a motor shaft, a tool fan that operates based on the rotation of the motor shaft, and a tool housing that houses the motor and the tool fan. The battery pack is configured to be detachably attached to the tool housing. The tool housing has a tool-side air intake port and a tool-side shutter. The tool-side air intake port draws air exhausted from the battery pack into the tool housing. The tool-side shutter has a recess. The tool-side shutter is configured to close the tool-side air intake port when the battery pack is removed from the tool housing and to open the tool-side air intake port when the battery pack is attached to the tool housing.The aforementioned battery pack comprises an all-solid-state battery, a battery-side air intake port, a battery-side exhaust port, protrusion The all-solid-state battery supplies power to the motor. The battery-side air intake port is located in front writing Ingredients housing When installed, the tool fan draws in air. The battery-side exhaust port is located in front writing Ingredients housing When installed, the operation of the tool fan draws in the air from the battery-side intake port, which then supplies the air to the power tool. Side intake port It exhausts to the outlet. The protrusion is provided at a position corresponding to the recess of the tool-side shutter. When the battery pack is attached to the tool housing, the tool-side shutter is opened by sliding at least one of the tool housing and the battery pack with the protrusion fitted into the recess of the tool-side shutter. [Effects of the Invention]

[0009] According to the power tool and battery pack of the above-described embodiment of this disclosure, it is possible to cool the battery pack having an all-solid-state battery. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic diagram showing the configuration of a power tool according to one embodiment. [Figure 2] Figure 2 is a plan view of the mounting part on the same power tool. [Figure 3] Figure 3 is a plan view of the battery pack of the same power tool. [Figure 4] Figure 4 is a schematic diagram showing the main components of the same power tool. [Figure 5] Figure 5 is a schematic diagram showing the configuration of a charging system according to one embodiment. [Modes for carrying out the invention]

[0011] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, elements common to each other are denoted by the same reference numerals, and redundant descriptions of the common elements may be omitted. The following embodiments are merely one of various embodiments of the present disclosure. The embodiments can be variously modified according to design and the like as long as the object of the present disclosure can be achieved. Also, the embodiments (including modifications) may be realized in appropriate combinations.

[0012] Each figure described in the present disclosure is a schematic diagram, and the ratio of the size and thickness of each component in each figure does not necessarily reflect the actual dimensional ratio. Note that the arrows indicating each direction in the drawings are merely examples and are not intended to define the direction when the power tool 1 is used. Also, the arrows indicating each direction in the drawings are merely shown for the purpose of explanation and do not have an entity.

[0013] In addition, the "orthogonal (perpendicular)" as used in the present disclosure means not only a state where the angle between two entities is exactly 90 degrees, but also a state where the two entities intersect within a certain range of difference. That is, the angle between two orthogonal entities falls within a certain range of difference (for example, 10 degrees or less) with respect to 90 degrees. That is, the "orthogonal" as used in the present disclosure includes a case where the angle formed by two entities is 80 degrees or more and 100 degrees or less. Similarly, for the "parallel" as used in the present disclosure, it means not only a state where two entities do not strictly intersect, but also a state where the two entities are arranged within a certain range of difference. For example, the "parallel" as used in the present disclosure includes a case where the inclination of the other with respect to one is 10 degrees or less. That is, the "parallel" as used in the present disclosure includes a case where the angle formed by one and the other is -10 degrees or more and 10 degrees or less.

[0014] (1) Overview First, the overview of the power tool 1 according to the present embodiment will be described with reference to FIG. 1.

[0015] As shown in FIG. 1, the power tool 1 is, for example, a portable power tool. The power tool 1 includes a power tool main body 2 and a battery pack 3. The power tool main body 2 includes a motor 4, a tool fan 5, and a tool housing 20.

[0016] The motor 4 has a motor shaft 41. The motor 4 operates by the power supplied from the battery pack 3.

[0017] The tool fan 5 operates based on the rotation of the motor shaft 41. The tool fan 5 is, for example, a centrifugal fan. When the tool fan 5 operates, the air existing in the space Sp1 where the tool fan 5 in the tool housing 20 is disposed is exhausted to the outside of the tool housing 20 through the tool-side exhaust hole 212.

[0018] The battery pack 3 supplies power to the motor 4. The battery pack 3 of the present embodiment is configured to be detachable from the tool housing 20. The battery pack 3 has an all-solid-state battery 38, battery-side intake holes 321 and 322, and a battery-side exhaust hole 311. The battery-side intake holes 321 and 322 intake air from the outside of the battery pack 3 into the battery pack 3 by the operation of the tool fan 5. The battery-side exhaust hole 311 exhausts the air intake from the battery-side intake holes 321 and 322 by the operation of the tool fan 5 to the tool fan 5 of the power tool 1.

[0019] The tool housing 20 houses the motor 4 and the tool fan 5. The tool housing 20 of the present embodiment is configured to be able to attach the battery pack 3. The tool housing 20 has a tool-side exhaust hole 212 and a ventilation path 222. The tool-side exhaust hole 212 exhausts the air in the tool housing 20 by the operation of the tool fan 5. The ventilation path 222 is formed between the tool-side exhaust hole 212 and the battery-side intake holes 321 and 322 of the battery pack 3.

[0020] According to the power tool 1 of this embodiment, the tool-side exhaust port 212 and the battery-side intake ports 321 and 322 of the battery pack 3 are connected by a ventilation passage 222. Therefore, when the tool fan 5 is in operation, it is possible to generate an airflow that passes through the battery-side intake ports 321 and 322, the ventilation passage 222, the battery-side exhaust port 311, and the tool-side exhaust port 212 in that order. According to the power tool 1 of this embodiment, by generating an airflow that passes through the inside of the battery pack 3, it is possible to cool the all-solid-state battery 38 of the battery pack 3.

[0021] The all-solid-state battery 38 can be rapidly charged tens of times faster than lithium-ion batteries, allowing for a reduction in battery capacity (battery size) if frequent charging is assumed. However, rapid charging has the problem of requiring a large charging current. Furthermore, because the electrolyte of the all-solid-state battery 38 is solid, its internal resistance is higher than that of lithium-ion batteries, which have a liquid electrolyte. Consequently, the all-solid-state battery 38 tends to become hotter than lithium-ion batteries during discharge to operate the motor 4 of the power tool body 2, and during charging. The power tool 1 of this embodiment allows for cooling of the all-solid-state battery 38, which tends to become hotter than lithium-ion batteries. In other words, the power tool 1 of this embodiment allows for the practical use of a battery pack 3 that is smaller and lighter than a battery pack containing lithium-ion batteries, thereby reducing the overall size of the power tool. The smaller and lighter power tool 1 reduces operator fatigue and improves work efficiency.

[0022] (2)Details The detailed configuration of the power tool 1 and charging system 8 according to this embodiment will be described below with reference to Figures 1 to 5. In the following description, the direction from the motor shaft 41 of the motor 4 toward the output shaft 61 (described later) will be referred to as the forward direction, and the direction from the output shaft 61 toward the motor shaft 41 will be referred to as the rear direction. In the following description, the forward and rear directions may be collectively referred to as the "front-rear direction." In the following description, the direction from the grip portion 22 (described later) toward the body portion 21 (described later) will be referred to as the upward direction, and the direction from the body portion 21 toward the grip portion 22 will be referred to as the downward direction. In the following description, the upward and downward directions may be collectively referred to as the "up-down direction." In addition, the direction perpendicular to the front-rear direction and the up-down direction may be referred to as the "left-right direction."

[0023] (2.1) Configuration of power tools The power tool 1 of this embodiment is used, for example, in an assembly line for assembling workpieces in a factory. As shown in Figure 1, the power tool 1 is a power tool that can be held in one hand by an operator, such as an impact rotary tool. As described above, the power tool 1 comprises a power tool body 2 and a battery pack 3.

[0024] (2.2) Configuration of the power tool body As shown in Figure 1, the power tool body 2 comprises a tool housing 20, a motor 4, a tool fan 5, a transmission mechanism 6, and a trigger 221.

[0025] Motor 4 is, for example, a brushless motor. Motor 4 has a motor shaft 41. Motor 4 converts the power supplied from the battery pack 3 into rotational driving force (torque) of the motor shaft 41.

[0026] As shown in Figure 1, the tool fan 5 is positioned in front of the motor 4. In this embodiment, the tool fan 5 is designed to operate integrally with the motor shaft 41, with the motor shaft 41's rotation axis as its center of rotation. In other words, when the motor shaft 41 rotates, the tool fan 5 rotates integrally with the motor shaft 41.

[0027] The tool fan 5 in this embodiment is a centrifugal fan that blows air in a centrifugal direction. That is, the tool fan 5 blows air radially outward from the motor shaft 41. The radial direction of the motor shaft 41 is perpendicular to the front-rear direction. The tool fan 5 blows the air present in the space Sp1 in which the tool fan 5 is located radially outward from the motor shaft 41, thereby exhausting the air present in space Sp1 to the outside of the tool housing 20 through the tool-side exhaust port 212.

[0028] The transmission mechanism 6 is positioned in front of the tool fan 5. The transmission mechanism 6 is a mechanism that transmits the rotational driving force transmitted from the motor shaft 41 of the motor 4 to the output shaft 61. In this embodiment, the transmission mechanism 6 includes an impact mechanism that generates a large tightening torque by applying rotational impact to the anvil.

[0029] The tip of the output shaft 61 is configured to allow attachment of tools such as socket bits and screwdriver bits. As the output shaft 61 rotates, the tools attached to it also rotate. For example, if a screwdriver bit is attached to the output shaft 61, the screwdriver bit rotates while in contact with a fastening member (such as a screw), enabling operations such as tightening or loosening the fastening member.

[0030] The trigger 221 is an operating unit that receives input for controlling the rotation of the motor 4. Part of the trigger 221 protrudes forward from the grip portion 22, while the other part of the trigger 221 is housed in the grip portion 22. Pulling the trigger 221 switches the motor 4 on and off. The amount of pull on the trigger 221 can also be used to adjust the rotation speed (rpm) of the motor 4. The greater the pull, the faster the rotation speed of the motor 4.

[0031] As shown in Figure 1, the tool housing 20 includes a body portion 21, a grip portion 22, a mounting portion 23, a tool-side shutter 24, and a spring 25.

[0032] The body section 21 has a cylindrical shape with a closed front and rear end. The body section 21 houses the motor 4, the tool fan 5, and the transmission mechanism 6. The body section 21 also has a plurality of (two in the example in Figure 1) tool-side intake holes 211 and a plurality of (one in the example in Figure 1) tool-side exhaust holes 212. The tool-side intake holes 211 draw in air from outside the tool housing 20 by the operation of the tool fan 5. The tool-side exhaust holes 212 exhaust air from inside the tool housing 20 by the operation of the tool fan 5. In this embodiment, the tool-side exhaust holes 212 are formed to face the tool fan 5. Further details will be explained in the section "(2.6) Configuration of the Charging System," but the tool-side exhaust holes 212 also function as tool-side intake holes 213.

[0033] The grip portion 22 protrudes downward from the body portion 21. The mounting portion 23 is configured so that the battery pack 3 can be detachably attached. In this embodiment, the grip portion 22 is formed in a cylindrical shape with an open top and bottom. The grip portion 22 has a ventilation passage 222.

[0034] As described above, the ventilation passage 222 is formed between the tool-side exhaust port 212 and the battery-side intake ports 321 and 322. More specifically, the ventilation passage 222 is formed between the tool-side exhaust port 212 and the battery-side intake ports 321 and 322 in the direction of the airflow generated by the operation of the tool fan 5. The upper end of the ventilation passage 222 (the upper end of the grip portion 22) is connected to the space Sp1 in which the tool fan 5 is located.

[0035] The mounting portion 23 is provided at the tip (lower end) of the grip portion 22. In other words, the body portion 21 and the mounting portion 23 are connected by the grip portion 22. The mounting portion 23 is formed in a rectangular box shape.

[0036] The mounting portion 23 has a bottom portion 231, a side circumference portion 232, a top portion 233, and a partition portion 234.

[0037] The top surface 233 is formed in the shape of a rectangular plate with an opening 2331. The thickness direction of the top surface 233 is aligned with the vertical direction. In other words, the thickness direction of the top surface 233 is parallel to the vertical direction. The edge of the opening 2331 of the top surface 233 has the same shape as the inner circumference of the grip portion 22 and is connected to the lower end of the grip portion 22 along its entire circumference.

[0038] The side circumferential portion 232 protrudes downward from the end (outer edge) of the top surface portion 233. The side circumferential portion 232 is formed around the entire circumference of the end of the top surface portion 233. In other words, the side circumferential portion 232 is formed in a rectangular cylindrical shape in cross-section. The side circumferential portion 232 of this embodiment has four planar portions that form a rectangular cylindrical shape. The four planar portions include a front portion, a rear portion that faces the front portion in the front-rear direction and is located behind the front portion, and a pair of corresponding side portions in the left-right direction.

[0039] The partition portion 234 protrudes forward from the rear surface of the side circumference portion 232. The partition portion 234 is formed in a rectangular plate shape. The thickness direction of the partition portion 234 is aligned with the vertical direction. A gap (space) is formed between the partition portion 234 and the top surface portion 233. A gap (space) is also formed between the partition portion 234 and the front surface of the side circumference portion 232. Furthermore, a gap (space) is formed between the partition portion 234 and the bottom surface portion 231. In this embodiment, in a plan view from below, a part of the partition portion 234 overlaps with the entire opening 2331. In other words, the partition portion 234 in this embodiment is positioned to completely conceal the opening 2331 in a plan view from below.

[0040] The bottom portion 231 is formed in the shape of a rectangular plate with a rectangular opening. The thickness direction of the bottom portion 231 is aligned with the vertical direction. The end (outer edge) of the bottom portion 231 is connected to the lower end of the side circumference portion 232 along its entire circumference. The opening of the bottom portion 231 functions as a tool-side air intake hole 2311. In other words, the bottom portion 231 has a tool-side air intake hole 2311. Furthermore, the bottom portion 231 of this embodiment also has a protruding portion 2312.

[0041] The tool-side air intake vent 2311 draws air exhausted from the battery pack 3 into the ventilation passage 222 through the operation of the tool fan 5. Figure 2 is a plan view of the mounting section 23 when the battery pack 3 is not attached, viewed from below. The dashed line in Figure 2 indicates the portion of the tool-side shutter 24 that is hidden by the bottom section 231. As shown in Figure 2, the tool-side air intake vent 2311 has four edges, including a pair of edges along the front-rear direction and a pair of edges along the direction perpendicular to the front-rear and up-down directions (left-right direction). In the following description, the edge located on the front side of the pair of edges along the left-right direction may be referred to as the "front edge". In this embodiment, in a plan view from above, a part of the partition section 234 and the entirety of the tool-side air intake vent 2311 overlap. In other words, the partition section 234 in this embodiment is positioned to hide the entirety of the tool-side air intake vent 2311 in a plan view from above.

[0042] The projection 2312 is formed along the leading edge of the tool-side air intake hole 2311 and protrudes downward. More specifically, in this embodiment, the projection 2312 is formed along the leading edge near the center of the leading edge. As shown in Figure 1, the projection 2312 is formed in a rectangular plate shape. The lower end of the projection 2312 is formed in a tapered shape, becoming thinner as it approaches the lower end. The lower end of the projection 2312 has an inclined surface that faces diagonally forward and diagonally downward.

[0043] The tool-side shutter 24 is formed in the shape of a rectangular plate having a rectangular opening 241. The thickness direction of the tool-side shutter 24 is aligned with the vertical direction. The tool-side shutter 24 is positioned between the partition 234 and the bottom surface 231 in the vertical direction. The tool-side shutter 24 is supported from below by the bottom surface 231.

[0044] As shown in Figure 2, the tool-side shutter 24 has four sides, including a pair of sides aligned in the front-to-back direction and a pair of sides aligned in the left-to-right direction. In the following description, the rear side of the pair of sides aligned in the left-to-right direction may be referred to as the "rear side". A recess is formed in the rear side of this embodiment, and a spring 25 is fitted into the recess. In addition to the opening 241, the tool-side shutter 24 has a recess 242.

[0045] The opening 241 is rectangular. The opening 241 is a through hole that runs vertically. As shown in Figure 2, when the battery pack 3 is not attached to the mounting part 23, the entire opening 241 overlaps with the bottom surface 231 in a plan view from below. In other words, when the battery pack 3 is not attached to the mounting part 23, the opening 241 is not exposed to the outside, thus preventing dust from entering the inside of the tool housing 20 through the tool-side air intake hole 2311 and the opening 241. In this disclosure, "dust" refers to minute objects such as "dirt," "scrap," "dust," and "debris," and includes, for example, metal powder, fiber scraps, sand, pollen, fly ash, etc. Details of the operation of the tool-side shutter 24 will be explained in the section "(2.4) Shutter Operation."

[0046] The pair of recesses 242 are formed so that a pair of protrusions 312 (see Figure 3), described later, of the battery pack 3 can be hooked onto them. The pair of recesses 242 are recessed upward and are formed in a rectangular shape when viewed from below. The pair of recesses 242 are arranged side by side in the left-right direction. One of the pair of recesses 242 is positioned along one of a pair of edges that run along the front-rear direction of the tool-side air intake hole 2311. The other of the pair of recesses 242 is positioned along the other of a pair of edges that run along the front-rear direction of the tool-side air intake hole 2311.

[0047] The spring 25 is a helical spring with its central axis aligned in the front-rear direction. The rear end of the spring 25 is fixed to the rear surface of the side circumference 232 (see Figure 1). The front end of the spring 25 is fitted into a recess formed on the rear edge of the tool-side shutter 24. The spring 25 is an elastic member that applies a forward force to the tool-side shutter 24. The tool housing 20 may have another elastic member or mechanism that applies a forward force to the tool-side shutter 24, either in place of or in addition to the spring 25.

[0048] (2.3) Battery pack configuration The battery pack 3 shown in Figure 1 supplies power to the motor 4 of the power tool body 2. The battery pack 3 is also configured to be detachable from the tool housing 20. The battery pack 3 comprises a battery housing 30, a solid-state battery 38, and a heat dissipation section 39.

[0049] The battery housing 30 is formed in a rectangular box shape. The battery housing 30 has a top surface 31, a side surface 32, a bottom surface 33, a guide surface 34, a pair of partition surfaces 35, a battery-side shutter 36, and a spring 37.

[0050] The bottom portion 33 is formed in a rectangular plate shape. The thickness direction of the bottom portion 33 is aligned with the vertical direction.

[0051] The side perimeter portion 32 protrudes upward from the end (edge) of the bottom portion 33. The side perimeter portion 32 is formed around the entire circumference of the end of the bottom portion 33. In other words, the side perimeter portion 32 is formed in a rectangular cylindrical shape in cross-section. The side perimeter portion 32 of this embodiment has four planar portions that form a rectangular cylindrical shape. The four planar portions include a front portion, a rear portion that faces the front portion in the front-rear direction and is located behind the front portion, and a pair of side portions that face each other in the left-right direction. The rear portion has a battery-side air intake hole 321, and the front portion has a battery-side air intake hole 322. The battery-side air intake holes 321 and 322 draw air from the outside of the battery housing 30 into the inside of the battery housing 30 by the operation of the tool fan 5. Further details will be explained in the section "(2.6) Configuration of the charging system," but the battery-side air intake hole 322 also functions as a battery-side exhaust hole 323.

[0052] The top surface portion 31 is formed in the shape of a rectangular plate with a rectangular opening. The thickness direction of the top surface portion 31 is aligned with the vertical direction. The end (outer edge) of the top surface portion 31 is connected to the upper end of the side circumference portion 32 along its entire circumference. The opening of the top surface portion 31 functions as a battery-side exhaust vent 311. In other words, the top surface portion 31 has a battery-side exhaust vent 311. Furthermore, the top surface portion 31 of this embodiment also has a pair of protrusions 312 (see Figure 3).

[0053] The battery-side exhaust port 311 exhausts the air drawn in from the battery-side intake ports 321 and 322 into the ventilation passage 222 of the power tool body 2, due to the operation of the tool fan 5. In other words, the air drawn in by the battery-side intake ports 321 and 322 passes through the inside of the battery housing 30 and moves to the ventilation passage 222 of the power tool body 2 via the battery-side exhaust port 311. Figure 3 is a plan view of the battery pack 3 as seen from above, when it is not attached to the mounting part 23. The dashed lines in Figure 3 indicate the portion of the battery-side shutter 36 hidden by the top surface 31 and the spring 37 hidden by the top surface 31. As shown in Figure 3, the battery-side exhaust port 311 has four edges, including a pair of edges along the front-rear direction and a pair of edges along the direction perpendicular to the front-rear and up-down directions (left-right direction). In the following description, the edge located at the rear of the pair of edges along the left-right direction may be referred to as the "rear edge".

[0054] Further details will be explained in section (2.6) "Charging System Configuration," but the battery-side exhaust port 311 also functions as a battery-side intake port.

[0055] The pair of protrusions 312 are formed to hook into the pair of recesses 242 (see Figure 2) of the battery pack 3. The pair of protrusions 312 project upward from the top surface 31. The shape of the pair of protrusions 312 is a rectangular prism shape. The pair of protrusions 312 are arranged side by side in the left-right direction. When the top surface 31 of the battery pack 3 and the bottom surface 231 of the mounting portion 23 are facing each other, the pair of protrusions 312 are positioned to face the pair of recesses 242 in the vertical direction.

[0056] As shown in Figure 1, the guide portion 34 protrudes forward from the rear surface of the side circumference portion 32. The guide portion 34 is formed in a rectangular plate shape. The thickness direction of the guide portion 34 is aligned with the vertical direction. A gap (space) is formed between the guide portion 34 and the top surface portion 31. A gap (space) is also formed between the guide portion 34 and the front surface of the side circumference portion 32. A gap (space) is also formed between the guide portion 34 and the bottom surface portion 33. The guide portion 34 is positioned opposite the battery-side shutter 36 so as to be in contact with it. The guide portion 34 is a member that guides the operation of the battery-side shutter 36.

[0057] The battery-side shutter 36 is formed in the shape of a rectangular plate with a rectangular opening 361. The thickness direction of the battery-side shutter 36 is aligned with the vertical direction. The battery-side shutter 36 is positioned between the guide portion 34 and the top surface portion 31 in the vertical direction. The battery-side shutter 36 is supported from below by the guide portion 34.

[0058] As shown in Figure 3, the battery-side shutter 36 has four sides, including a pair of sides aligned in the front-to-back direction and a pair of sides aligned in the left-to-right direction. In the following description, the front side of the pair of sides aligned in the left-to-right direction may be referred to as the "front side". A recess is formed in the front side of this embodiment, and a spring 37 is fitted into the recess. In addition to the opening 361, the battery-side shutter 36 has an inclined portion 362.

[0059] The opening 361 is a rectangular opening. The opening 361 is a through hole running vertically. The opening 361 has four edges, including a pair of edges running in the front-to-back direction and a pair of edges running in the left-to-right direction. In the following description, the front edge of the pair of edges running in the left-to-right direction may be referred to as the "front edge".

[0060] As shown in Figure 3, when the battery pack 3 is not attached to the mounting section 23, the entire opening 361 overlaps with the top surface 31 in a top view. In other words, when the battery pack 3 is not attached to the mounting section 23, the opening 361 is not exposed to the outside, thus preventing dust from entering the inside of the battery housing 30 through the battery-side exhaust holes 311 and the opening 361.

[0061] The inclined portion 362 is formed along the front edge of the opening 361, and more specifically, in this embodiment, the inclined portion 362 is formed along the front edge near the center of the front edge. As shown in Figure 1, the inclined portion 362 has a tapered shape, becoming thinner as it approaches the rear end (opening 361). The inclined portion 362 has an inclined surface that faces diagonally upward and diagonally backward. When the top surface 31 of the battery pack 3 and the bottom surface 231 of the mounting portion 23 are facing each other, the inclined portion 362 is positioned in the vertical direction opposite to the protruding portion 2312 of the bottom surface 231.

[0062] The spring 37 is a helical spring with its central axis aligned in the front-rear direction. The front end of the spring 37 is fixed to the front part of the side circumference 32 (see Figure 1). The rear end of the spring 37 is fitted into a recess formed on the front edge of the battery-side shutter 36. The spring 37 is an elastic member that applies a rearward force to the battery-side shutter 36. The battery housing 30 may have another elastic member or mechanism that applies a rearward force to the battery-side shutter 36, either in place of or in addition to the spring 37. Details of the operation of the spring 37 will be explained in section (2.4) Shutter Operation.

[0063] The pair of partitions 35 protrude upward from the bottom surface 33. The pair of partitions 35 are formed along the left-right direction, extending from one end to the other of the bottom surface 33 in the left-right direction. The pair of partitions 35 are formed in a rectangular plate shape. The thickness direction of the pair of partitions 35 is aligned with the front-back direction.

[0064] The all-solid-state battery 38 is located in a region enclosed by a pair of partitions 35 and a pair of side surfaces of the periphery 32. The all-solid-state battery 38 stores power and supplies power to the motor 4 of the power tool body 2, etc. In this embodiment, the all-solid-state battery 38 includes a plurality of laminate cells (pouch-type cells) stacked in the vertical direction.

[0065] The heat dissipation section 39 is directly or indirectly attached to the solid-state battery 38 and dissipates the heat generated in the solid-state battery 38. The heat dissipation section 39 is made of a material with a higher thermal conductivity than air. More specifically, the heat dissipation section 39 is made of a heat dissipation member made of, for example, urethane resin, silicone resin, or conductive polymer, or a metal member made of iron and aluminum. In this embodiment, the heat dissipation section 39 is made of aluminum. The thermal conductivity of aluminum at room temperature (approximately 236 W / m·K) is far higher than the thermal conductivity of air at room temperature (approximately 0.024 W / m·K). By attaching the heat dissipation section 39 to the solid-state battery 38, the solid-state battery 38 can be cooled.

[0066] In this embodiment, the heat dissipation unit 39 is directly attached to the solid-state battery 38. However, the heat dissipation unit 39 may be indirectly attached to the solid-state battery 38 via another heat dissipation member or metal member, etc.

[0067] As shown in Figure 4, the heat dissipation section 39 of this embodiment has a plurality of heat dissipation fins. The plurality of heat dissipation fins protrude upward from the portion of the heat dissipation section 39 that is in direct or indirect contact with the all-solid-state battery 38. The plurality of heat dissipation fins are formed along the front-to-back direction. The shape of the plurality of heat dissipation fins is plate-like with the thickness direction aligned with the left-to-right direction. By having a plurality of heat dissipation fins in the heat dissipation section 39, the heat dissipation performance of the heat dissipation section 39 can be further improved.

[0068] At least a portion of the heat dissipation section 39 in this embodiment overlaps with the battery-side air intake holes 321 and 322 in a plan view from the front-to-back direction. Also, at least a portion of the heat dissipation section 39 overlaps with the battery-side exhaust hole 311 in a plan view from above. In other words, at least a portion of the heat dissipation section 39 is positioned in the airflow path from the battery-side air intake holes 321 and 322 to the battery-side exhaust hole 311 when the tool fan 5 is operating. The heat dissipation section 39 then dissipates the heat generated by the all-solid-state battery 38 into the air flowing from the battery-side air intake holes 321 and 322 to the battery-side exhaust hole 311. Because the heat dissipation section 39 is positioned in the airflow path formed by the operation of the tool fan 5, the heat dissipation performance of the heat dissipation section 39 can be further improved.

[0069] (2.4) Shutter operation Next, the operation of the tool-side shutter 24 and the battery-side shutter 36 will be described. As shown in Figure 4, when the battery pack 3 is not attached to the mounting part 23 of the power tool body 2, the tool-side shutter 24 closes the tool-side air intake vent 2311, and the battery-side shutter 36 closes the battery-side exhaust vent 311. In other words, when the battery pack 3 is not attached to the mounting part 23 of the power tool body 2, the tool-side shutter 24 is in a closed position, closed by the elastic force of the spring 25 to close the tool-side air intake vent 2311. Similarly, when the battery pack 3 is not attached to the mounting part 23 of the power tool body 2, the battery-side shutter 36 is in a closed position, closed by the elastic force of the spring 37 to close the battery-side exhaust vent 311.

[0070] Next, we will describe the case in which an operator attaches the battery pack 3 to the mounting section 23. First, the operator moves the power tool body 2 and the battery pack 3 so that the multiple protrusions 312 of the battery pack 3 fit into the multiple recesses 242 (see Figure 2) of the mounting section 23, and so that the inclined surface of the protrusions 2312 of the mounting section 23 and the inclined surface of the inclined section 362 of the battery pack 3 are in contact with each other.

[0071] Next, the operator slides at least one of the power tool body 2 and the battery pack 3 along the front-rear direction against the repulsive force (elastic force) of the springs 25 and 37, so that the mounting part 23 moves forward relative to the battery pack 3 and the battery pack 3 moves backward relative to the mounting part 23.

[0072] As the mounting portion 23 slides, the multiple recesses 242 of the mounting portion 23 receive a rearward force from the multiple protrusions 312 of the battery pack 3. As the multiple recesses 242 receive a rearward force, the spring 25 compresses, and the tool-side shutter 24 moves rearward. Also, as the mounting portion 23 slides, the inclined surface of the inclined portion 362 of the battery pack 3 receives a forward force from the inclined surface of the protrusions 2312 of the mounting portion 23, causing the spring 37 to compress, and the battery-side shutter 36 to move forward.

[0073] When at least one of the power tool body 2 and the battery pack 3 is slid to the positional relationship shown in Figure 1, the battery pack 3 is fixed to the mounting part 23.

[0074] As shown in Figure 1, when the battery pack 3 is attached to the mounting section 23, in a plan view from above, at least a portion of the opening 241 of the tool-side shutter 24 and at least a portion of the tool-side air intake vent 2311 overlap. Also, when the battery pack 3 is attached to the mounting section 23, in a plan view from above, at least a portion of the opening 361 of the battery-side shutter 36 and at least a portion of the battery-side exhaust vent 311 overlap. In other words, when the battery pack 3 is attached to the mounting section 23, the tool-side shutter 24 opens the tool-side air intake vent 2311, and the battery-side shutter 36 opens the battery-side exhaust vent 311.

[0075] As described above, the tool housing 20 has a tool-side shutter 24 that opens and closes the tool-side air intake port 2311. The presence of the tool-side shutter 24 prevents dust from entering the inside of the tool housing 20 through the tool-side air intake port 2311 when the battery pack 3 is removed from the tool housing 20. Furthermore, the tool-side shutter 24 in this embodiment automatically closes the tool-side air intake port 2311 when the battery pack 3 is removed from the tool housing 20, thus more reliably preventing dust from entering the inside of the tool housing 20 through the tool-side air intake port 2311.

[0076] As described above, the battery pack 3 has a battery-side shutter 36 that opens and closes the battery-side exhaust port 311. The presence of the battery-side shutter 36 prevents dust from entering the inside of the battery pack 3 through the battery-side exhaust port 311 when the battery pack 3 is removed from the tool housing 20. Furthermore, the battery-side shutter 36 in this embodiment automatically closes the battery-side exhaust port 311 when the battery pack 3 is removed from the tool housing 20, thus more reliably preventing dust from entering the inside of the battery pack 3 through the battery-side exhaust port 311.

[0077] (2.5) Regarding airflow As shown in Figure 1, when the battery pack 3 is attached to the mounting section 23, in a plan view from above, at least a portion of the opening 241 of the tool-side shutter 24, at least a portion of the tool-side intake hole 2311, at least a portion of the opening 361 of the battery-side shutter 36, and at least a portion of the battery-side exhaust hole 311 overlap. In other words, when the battery pack 3 is attached to the mounting section 23, the internal space of the battery housing 30 and the internal space of the mounting section 23 are connected. The internal space of the mounting section 23 is connected to the ventilation passage 222 of the grip section 22 and the space Sp1 where the tool fan 5 is located.

[0078] With the battery pack 3 attached to the mounting section 23, when the trigger 221 is operated by the operator, the motor shaft 41 rotates. The rotation of the motor shaft 41 causes the tool fan 5 to rotate. When the tool fan 5 rotates, the air present in the space Sp1 where the tool fan 5 is located is exhausted to the outside through the tool-side exhaust port 212, causing the air pressure in space Sp1 to decrease. As the air pressure in space Sp1 decreases, the air present around the tool housing 20 moves into space Sp1 through the tool-side intake port 211.

[0079] Furthermore, as the air pressure in space Sp1 decreases, the air present around the battery housing 30 moves into the internal space of the battery housing 30 through the battery-side intake port 321 or the battery-side intake port 322. The air that moves into the internal space of the battery housing 30 passes through at least a portion of the heat dissipation section 39, the opening 361 of the battery-side shutter 36, the battery-side exhaust port 311, the tool-side intake port 2311, and the opening 241 of the tool-side shutter 24 in that order, and moves into the internal space of the mounting section 23. As the air passes through at least a portion of the heat dissipation section 39, it cools the heat dissipation section 39 and the all-solid-state battery 38. The air that moves into the internal space of the mounting section 23 passes through the space between the partition section 234 and the front part of the side peripheral section 232, the opening 2331 of the top surface section 233, the ventilation passage 222, and the space Sp1 where the tool fan 5 is located, in that order, and is exhausted to the outside from the tool-side exhaust port 212.

[0080] (2.6) Charging System Configuration Next, the configuration of the charging system 8 will be described with reference to Figure 5. As shown in Figure 5, the charging system 8 comprises a battery pack 3 and a charging device 7. In other words, the battery pack 3 is a component of the power tool 1 and also a component of the charging system 8.

[0081] The battery pack 3 is charged by the charging device 7.

[0082] In the charging system 8, the battery-side air intake port 321 of the battery pack 3 draws air from the outside of the battery pack 3 into the inside of the battery pack 3 through the operation of the charging device fan 72, which will be described later.

[0083] Furthermore, in the charging system 8, the battery-side intake port 322 of the battery pack 3 functions as a battery-side exhaust port 323 that exhausts air drawn in from the battery-side intake port 321 towards the charging device 7 by the operation of the charging device fan 72. In other words, the battery housing 30 of the battery pack 3 has a battery-side exhaust port 323.

[0084] The charging device 7 is a device for charging a battery pack 3 having an all-solid-state battery 38. The charging device 7 comprises a charging device housing 70, a charging unit 71, a charging device fan 72, and a motor 73.

[0085] The charging unit 71 converts power from an external power source into power to be supplied to the battery pack 3 and outputs it to the battery pack 3. More specifically, the charging unit 71 converts power from an external power source into power to be supplied to the solid-state battery 38 and outputs it to the solid-state battery 38. The external power source includes grid power, distributed power sources such as solar cells, and portable power sources such as portable power supplies. In other words, the charging unit 71 of this embodiment supports rapid charging that is tens of times faster than that of a lithium-ion battery, and is configured to output a larger current compared to a charging unit that charges a lithium-ion battery.

[0086] Motor 73 has a motor shaft 731. The motor shaft 731 is connected to the charging device fan 72. In other words, motor 73 is the motor that operates (rotates) the charging device fan 72.

[0087] The charging device fan 72 operates when the battery pack 3 is being charged, that is, when the charging unit 71 is in operation. The charging device fan 72 is, for example, a centrifugal fan. When the charging device fan 72 operates, the air present in the space where the charging device fan 72 is located within the charging device housing 70 is exhausted to the outside of the charging device housing 70 through the charging device side exhaust port 701, which will be described later.

[0088] The charging device housing 70 houses the charging unit 71, the charging device fan 72, and the motor 73. The charging device housing 70 is also configured to securely hold the power tool 1. However, it is not essential that the charging device housing 70 is configured to securely hold the power tool 1; it is sufficient that the charging device housing 70 is configured to securely hold the battery pack 3.

[0089] The charging device housing 70 has a plurality of (three in the example in Figure 5) charging device side exhaust holes 701, a partition portion 702, and a charging device side intake hole 703.

[0090] In this embodiment, the multiple exhaust holes 701 on the charging device side are formed, for example, in positions facing the charging device fan 72. The multiple exhaust holes 701 on the charging device side are formed, for example, in the vicinity of the charging device fan 72. The multiple exhaust holes 701 on the charging device side are used by the charging device fan 72 to exhaust the air present inside the charging device housing 70 to the outside of the charging device housing 70.

[0091] The partition 702 separates the charging device housing 70 into a portion that houses the charging device fan 72 and a portion that secures the power tool 1 (or battery pack 3). In this embodiment, the partition 702 is formed in the shape of a rectangular plate with its thickness aligned in the front-to-back direction. In this embodiment, the charging device fan 72 is positioned in front of the partition 702, and the battery pack 3 is secured behind the partition 702.

[0092] The charging device side intake port 703 is formed in the partition portion 702. The charging device side intake port 703 penetrates the partition portion 702 along the front-to-back direction. In this embodiment, the shape of the charging device side intake port 703 is rectangular when viewed from the front-to-back direction. The charging device side intake port 703 draws in air exhausted from the battery side exhaust port 323 by the operation of the charging device fan 72.

[0093] In this embodiment, the charging device side intake port 703 is located in front of the battery side exhaust port 323 of the battery pack 3. At least a portion of the charging device side intake port 703 faces at least a portion of the battery side exhaust port 323 when the battery pack 3 is being charged, that is, when the battery pack 3 is fixed to the charging device housing 70.

[0094] (2.7) Regarding airflow Once the battery pack 3 is secured in the charging device housing 70, the charging device 7 begins charging the solid-state battery 38 of the battery pack 3. As the charging device 7 begins charging, the charging device fan 72 operates (rotates). When the charging device fan 72 rotates, the air in the space where the charging device fan 72 is located is exhausted to the outside through the charging device exhaust port 701, causing the air pressure in the space where the charging device fan 72 is located to decrease.

[0095] As the air pressure in the space where the charging device fan 72 is located decreases, the air surrounding the battery housing 30 moves into the internal space of the battery housing 30 through the battery-side intake port 321. The air that has moved into the internal space of the battery housing 30 passes through at least a portion of the heat dissipation section 39, the battery-side exhaust port 323, the charging device-side intake port 703, and the space where the charging device fan 72 is located, in that order, and is exhausted to the outside of the charging device housing 70 through the charging device-side exhaust port 701.

[0096] As air passes through at least a portion of the heat dissipation section 39, it cools the heat dissipation section 39 and the all-solid-state battery 38. In other words, at least a portion of the heat dissipation section 39 of the battery pack 3 is positioned in the airflow path from the battery-side intake port 321 to the battery-side exhaust port 323 when the charging device fan 72 is operating. At least a portion of the heat dissipation section 39 of the battery pack 3 dissipates the heat generated by the all-solid-state battery 38 into the air flowing from the battery-side intake port 321 to the battery-side exhaust port 323. Because the heat dissipation section 39 is positioned in the airflow path formed by the operation of the charging device fan 72, the heat dissipation performance of the heat dissipation section 39 can be further improved.

[0097] According to the charging system 8 of this embodiment, an airflow can be formed between the battery-side intake port 321 and the battery-side exhaust port 323, thereby enabling cooling of the all-solid-state battery 38, for example, which is positioned between the battery-side intake port 321 and the battery-side exhaust port 323.

[0098] Furthermore, since at least a portion of the charging device side intake port 703 in this embodiment faces at least a portion of the battery side exhaust port 323 of the battery pack 3, the operation of the charging device fan 72 facilitates the formation of airflow between the space where the charging device fan 72 is located and the battery side intake port 321, thereby enabling better cooling of the solid-state battery 38.

[0099] Furthermore, as the air pressure in the space where the charging device fan 72 is located decreases, the air present around the tool housing 20 moves into the interior of the tool housing 20 through the tool-side intake port 211 or the tool-side intake port 213. The air that has moved into the interior of the tool housing 20 passes through the ventilation passage 222, the opening 2331 of the top surface portion 233, the space between the partition portion 234 and the front portion of the side peripheral portion 232, the opening 241 of the tool-side shutter 24, the tool-side intake port 2311, the battery-side intake port (battery-side exhaust port 311), and the opening 361 of the battery-side shutter 36, and moves into the interior space of the battery housing 30. The air that has moved into the interior space of the battery housing 30 passes through at least a part of the heat dissipation portion 39, the battery-side exhaust port 323, the charging device-side intake port 703, and the space where the charging device fan 72 is located, and is exhausted to the outside of the charging device housing 70 via the charging device-side exhaust port 701.

[0100] (3) Variant The following lists some modifications of the above embodiment.

[0101] In the above embodiment, the battery pack 3 is shown to be detachable from the tool housing 20, but the battery pack 3 may be integrally formed with the tool housing 20. In other words, the battery pack 3 may not be removable from the tool housing 20.

[0102] In the above embodiment, an example was given in which the tool-side shutter 24 automatically closes the tool-side air intake 2311 by the elastic force of the spring 25 when the battery pack 3 is removed from the mounting part 23. However, the tool-side shutter 24 may also be configured to be opened and closed manually by the operator.

[0103] In the above embodiment, an example was given in which the battery-side shutter 36 automatically closes the battery-side exhaust port 311 by the elastic force of the spring 37 when the battery pack 3 is removed from the mounting part 23. However, the battery-side shutter 36 may also be configured to be opened and closed manually by an operator.

[0104] The positions of the battery-side intake holes 321, 322, tool-side intake hole 211, tool-side exhaust hole 212, charger-side intake hole 703, and charger-side exhaust hole 701 in the above embodiment are examples only, and these positions can be set as appropriate.

[0105] In the above embodiment, the charging device housing 70 is shown as having a partition portion 702, but the charging device housing 70 may not have a partition portion 702, and the charging device fan 72 may be simply exposed to the battery pack 3.

[0106] In the above embodiment, the example shows that the all-solid-state battery 38 includes laminated cells (pouch-type cells), but the all-solid-state battery 38 may also include cylindrical cells (including button-type cells) or prismatic cells.

[0107] (summary) As described above, the power tool (1) according to the first embodiment comprises a motor (4), a battery pack (3), a tool fan (5), and a tool housing (20). The motor (4) has a motor shaft (41). The battery pack (3) has a solid-state battery (38) that supplies power to the motor (4). The tool fan (5) operates based on the rotation of the motor shaft (41). The tool housing (20) houses the motor (4) and the tool fan (5). The battery pack (3) has battery-side intake ports (321; 322). The battery-side intake ports (321; 322) draw air from the outside of the battery pack (3) into the inside of the battery pack (3). The tool housing (20) has a tool-side exhaust port (212) and a ventilation passage (222). The tool-side exhaust port (212) exhausts air from inside the tool housing (20) through the operation of the tool fan (5). The ventilation passage (222) is formed between the tool-side exhaust port (212) and the battery-side intake ports (321;322).

[0108] In this embodiment, since the tool exhaust port and the battery-side intake port (321;322) of the battery pack (3) are connected by a ventilation passage (222), the operation of the tool fan (5) can generate an airflow that passes through the battery-side intake port (321;322), the ventilation passage (222), and the tool-side exhaust port (212) in that order. By generating an airflow that passes through the inside of the battery pack (3), the all-solid-state battery (38) of the battery pack (3) can be cooled.

[0109] In the power tool (1) according to the second embodiment, the battery pack (3) is configured to be detachable from the tool housing (20) as in the first embodiment. The battery pack (3) has a battery-side exhaust port (311). The battery-side exhaust port (311) exhausts the air drawn in from the battery-side intake ports (321; 322) into the ventilation passage (222) by the operation of the tool fan (5).

[0110] In this embodiment, the air drawn in through the battery-side intake port (321;322) moves to the ventilation passage (222) of the tool housing (20) via the battery-side exhaust port (311).

[0111] In the third embodiment of the power tool (1), in the second embodiment, the battery pack (3) has a battery-side shutter (36). The battery-side shutter (36) opens and closes the battery-side exhaust port (311).

[0112] According to this embodiment, when the battery pack (3) is removed from the tool housing (20), it is possible to prevent dust from entering the inside of the battery pack (3) through the battery-side exhaust port (311).

[0113] In the power tool (1) according to the fourth embodiment, in the third embodiment, the battery-side shutter (36) is configured to close the battery-side exhaust port (311) when the battery pack (3) is removed from the tool housing (20). The battery-side shutter (36) is configured to open the battery-side exhaust port (311) when the battery pack (3) is attached to the tool housing (20).

[0114] According to this embodiment, it is possible to more reliably prevent dust from entering the inside of the battery pack (3) from the battery-side exhaust port (311).

[0115] In the power tool (1) according to the fifth embodiment, in any of the first to fourth embodiments, the battery pack (3) has a heat dissipation section (39). The heat dissipation section (39) is directly or indirectly attached to the solid-state battery (38) and dissipates the heat generated by the solid-state battery (38).

[0116] According to this embodiment, the heat dissipation unit (39) is attached to the solid-state battery (38), thereby enabling cooling of the solid-state battery (38).

[0117] In the power tool (1) according to the sixth embodiment, the battery pack (3) further has a battery-side exhaust port (311). The battery-side exhaust port (311) exhausts the air drawn in from the battery-side intake ports (321;322) into the ventilation passage (222) when the tool fan (5) is operating. At least a portion of the heat dissipation section (39) is positioned in the airflow path from the battery-side intake ports (321;322) to the battery-side exhaust port (311) when the tool fan (5) is operating. At least a portion of the heat dissipation section (39) dissipates the heat generated by the solid-state battery (38) into the air.

[0118] According to this embodiment, since the heat dissipation unit (39) is positioned in the airflow path formed by the operation of the tool fan (5), the heat dissipation performance of the heat dissipation unit (39) can be further improved.

[0119] In the power tool (1) according to the seventh embodiment, in any of the first to sixth embodiments, the battery pack (3) is configured to be detachably attached to the tool housing (20). The tool housing (20) further includes a tool-side air intake port (2311) and a tool-side shutter (24). The tool-side air intake port (2311) draws air exhausted from the battery pack (3) into the ventilation passage (222). The tool-side shutter (24) opens and closes the tool-side air intake port (2311).

[0120] According to this embodiment, when the battery pack (3) is removed, it is possible to prevent dust from entering the inside of the tool housing (20) through the tool-side air intake hole (2311).

[0121] In the power tool (1) according to the eighth embodiment, in the seventh embodiment, the tool-side shutter (24) is configured to close the tool-side air intake port (2311) when the battery pack (3) is removed from the tool housing (20). The tool-side shutter (24) is configured to open the tool-side air intake port (2311) when the battery pack (3) is attached to the tool housing (20).

[0122] According to this embodiment, it is possible to more reliably suppress dust from entering the inside of the tool housing (20) from the tool-side intake port (2311).

[0123] The configurations other than those in the first embodiment are not essential to the power tool (1) and can be omitted as appropriate.

[0124] The power tool (power tool body 2) according to the ninth embodiment comprises a motor (4), a tool fan (5), and a tool housing (20). The motor (4) has a motor shaft (41). The tool fan (5) operates based on the rotation of the motor shaft (41). The tool housing (20) houses the motor (4) and the tool fan (5). The tool housing (20) is configured to accommodate a battery pack (3). The battery pack (3) has a solid-state battery (38) that supplies power to the motor (4). The battery pack (3) has battery-side intake ports (321; 322). The battery-side intake ports (321; 322) draw air from the outside of the battery pack (3) into the inside of the battery pack (3). The tool housing (20) has a tool-side exhaust port (212) and a ventilation passage (222). The tool-side exhaust port (212) exhausts air from inside the tool housing (20) through the operation of the tool fan (5). The ventilation passage (222) connects the tool-side exhaust port (212) and the battery-side intake ports (321;322) when the battery pack (3) is installed.

[0125] In this embodiment, since the tool-side exhaust port (212) and the battery-side intake ports (321;322) of the battery pack (3) are connected by a ventilation passage (222), the operation of the tool fan (5) can generate an airflow that passes through the battery-side intake ports (321;322), the ventilation passage (222), and the tool-side exhaust port (212) in that order. By generating an airflow that passes through the inside of the battery pack (3), the all-solid-state battery (38) of the battery pack (3) can be cooled.

[0126] The battery pack (3) according to the tenth embodiment is configured to be detachably attached to the power tool (1). The power tool (1) includes a motor (4) having a motor shaft (41), a tool fan (5) that operates based on the rotation of the motor shaft (41), and a tool housing (20) that houses the motor (4) and the tool fan (5). The battery pack (3) includes a solid-state battery (38), battery-side air intake ports (321; 322), and battery-side exhaust port (311). The solid-state battery (38) supplies power to the motor (4). The battery-side air intake ports (321; 322) draw in air when the battery pack is attached to the power tool (1) due to the operation of the tool fan (5). The battery-side exhaust port (311), when attached to the power tool (1), exhausts air drawn in from the battery-side intake ports (321; 322) to the power tool's (1) tool fan (5) by the operation of the tool fan (5).

[0127] In this embodiment, since the tool-side exhaust port (212) and the battery-side intake ports (321;322) of the battery pack (3) are connected by a ventilation passage (222), the operation of the tool fan (5) can generate an airflow that passes through the battery-side intake ports (321;322), the ventilation passage (222), and the tool-side exhaust port (212) in that order. By generating an airflow that passes through the inside of the battery pack (3), the all-solid-state battery (38) of the battery pack (3) can be cooled. [Explanation of Symbols]

[0128] 1 Power tools 2 Power tool body 20 Tool Housings 212 Tool-side exhaust port 222 Ventilation duct 2311 Tool-side air intake port 24 Tool-side shutter 3 Battery pack 321 Battery side air intake port 322 Battery-side air intake port 311 Battery side exhaust port 36 Battery-side shutter 38 All-solid-state battery 39 Heat radiation part 4 motors 41 Motor shaft 5 Tool Fans

Claims

1. A motor having a motor shaft, A battery pack having an all-solid-state battery that supplies power to the motor, A tool fan that operates based on the rotation of the motor shaft, A tool housing that houses the motor and the tool fan, Equipped with, The battery pack has a battery-side air intake port that draws air from the outside of the battery pack into the inside of the battery pack, The tool housing is The tool-side exhaust port, which exhausts air from inside the tool housing by the operation of the tool fan, A ventilation passage formed between the tool-side exhaust port and the battery-side intake port, A tool-side air intake port that draws the air exhausted from the battery pack into the ventilation passage, A tool-side shutter that opens and closes the tool-side air intake port, It has, The battery pack is configured to be detachable from the tool housing, The tool-side shutter is configured to close the tool-side air intake when the battery pack is removed from the tool housing, and to open the tool-side air intake when the battery pack is attached to the tool housing. Power tools.

2. The battery pack is The operation of the tool fan causes the air drawn in from the battery-side intake port to be exhausted into the ventilation passage via a battery-side exhaust port, A battery-side shutter that opens and closes the battery-side exhaust port, Furthermore, The battery-side shutter is configured to close the battery-side exhaust port when the battery pack is removed from the tool housing, and to open the battery-side exhaust port when the battery pack is attached to the tool housing. The power tool according to claim 1.

3. The battery pack is directly or indirectly attached to the all-solid-state battery and has a heat dissipation section that dissipates heat generated by the all-solid-state battery. The power tool according to claim 1.

4. The battery pack further has a battery-side exhaust port that exhausts the air drawn in from the battery-side intake port into the ventilation passage by the operation of the tool fan, At least a portion of the heat dissipation section is When the tool fan is in operation, the airflow path is arranged from the battery-side intake port to the battery-side exhaust port. The heat generated by the all-solid-state battery is dissipated into the air. The power tool according to claim 3.

5. A motor having a motor shaft, A tool fan that operates based on the rotation of the motor shaft, A tool housing that houses the motor and the tool fan, Equipped with, The tool housing is configured to accommodate a battery pack having an all-solid-state battery that supplies power to the motor. The battery pack has a battery-side air intake port that draws air from the outside of the battery pack into the inside of the battery pack, The tool housing is The tool-side exhaust port, which exhausts air from inside the tool housing by the operation of the tool fan, With the battery pack installed, a ventilation passage connects the tool-side exhaust port and the battery-side intake port, A tool-side air intake port that draws the air exhausted from the battery pack into the ventilation passage, A tool-side shutter that opens and closes the tool-side air intake port, It has, The battery pack is configured to be detachable from the tool housing, The tool-side shutter is configured to close the tool-side air intake when the battery pack is removed from the tool housing, and to open the tool-side air intake when the battery pack is attached to the tool housing. Power tools.

6. A battery pack configured to be detachably attached to the tool housing of an electric tool, comprising a motor having a motor shaft, a tool fan that operates based on the rotation of the motor shaft, and a tool housing that houses the motor and the tool fan, The tool housing is A tool-side air intake port that draws air exhausted from the battery pack into the tool housing, A tool-side shutter having a recess, configured to close the tool-side air intake when the battery pack is removed from the tool housing, and to open the tool-side air intake when the battery pack is attached to the tool housing, It has, The aforementioned battery pack is A solid-state battery that supplies power to the motor, When attached to the tool housing, the battery-side air intake port draws in air through the operation of the tool fan, When installed in the tool housing, the battery-side exhaust port exhausts the air drawn in from the battery-side intake port by the operation of the tool fan to the tool-side intake port of the power tool, A protrusion provided at a position corresponding to the recess of the tool-side shutter, Equipped with, When the battery pack is attached to the tool housing, the tool housing and the battery pack are slid together with the protruding portion fitted into the recess of the tool-side shutter, thereby opening the tool-side shutter. Battery pack.

Images