CN108110271B - Battery and electric tool - Google Patents
Battery and electric tool Download PDFInfo
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- CN108110271B CN108110271B CN201711387817.9A CN201711387817A CN108110271B CN 108110271 B CN108110271 B CN 108110271B CN 201711387817 A CN201711387817 A CN 201711387817A CN 108110271 B CN108110271 B CN 108110271B
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
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Abstract
The present invention relates to a battery comprising: a housing and a self-discharge circuit; the self-discharge loop comprises a first conductive piece which is arranged in the shell and electrically connected with the positive electrode of the battery, and a second conductive piece which is arranged in the shell and electrically connected with the negative electrode of the battery; the first conductive member has a first position, a second position and a third position relative to the second conductive member; when the first conductive piece is positioned at the first position and the second position, the first conductive piece is not contacted with the second conductive piece; when the first conductive piece is positioned at the third position, the first conductive piece is electrically connected with the second conductive piece; the first conductive member is switched from the first position to the second position under the promotion of an external force, and is switched and kept at the third position after the external force is removed. When the first conductive piece is located at the third position relative to the second conductive piece, the self-discharging loop is closed, the residual electric quantity of the battery is consumed in a short time, the self-discharging effect of the battery after use is achieved, and the fire and the like caused by the fact that the battery accidentally forms the closed loop are avoided. The invention also relates to an electric tool.
Description
Technical Field
The invention relates to the field of energy sources, in particular to a battery and an electric tool.
Background
Batteries are widely used today because of their ease of use. When the battery is applied to an electric tool such as a stapler, the battery with the full charge must be selected, otherwise, the use is interrupted due to insufficient charge, which may cause unexpected accidents. When the battery is used in the anastomat, if the battery is low in power, the operation is interrupted, and serious life danger is brought to a patient. In such power tools, the battery is therefore a disposable product.
When the battery is used as a disposable product, most of the used batteries still have residual capacity. When the positive and negative electrodes of the used batteries are connected by the conductive substance, a closed loop is accidentally formed and conducted, and a fire or the like may be seriously caused.
Disclosure of Invention
In view of the above, it is desirable to provide a battery that can avoid the accidental formation of a closed circuit and can be turned on.
A battery, comprising: a housing and a self-discharge circuit;
the self-discharge loop comprises a first conductive piece which is arranged in the shell and is electrically connected with the positive electrode of the battery, and a second conductive piece which is arranged in the shell and is electrically connected with the negative electrode of the battery;
the first conductive member has a first position, a second position, and a third position relative to the second conductive member; when the first conductive piece is positioned at the first position and the second position, the first conductive piece is not contacted with the second conductive piece; when the first conductive piece is positioned at a third position, the first conductive piece is electrically connected with the second conductive piece;
the first conductive piece is switched from the first position to the second position under the promotion of external force, and is switched and kept at the third position after the external force is cancelled.
The battery is provided with a self-discharge loop, and the self-discharge loop comprises a first conductive piece electrically connected with the positive electrode of the battery and a second conductive piece electrically connected with the negative electrode of the battery. The first conductive member is switched from the first position to the second position under the promotion of an external force and is kept at the third position after the external force is removed. When the first conductive piece is located at the first position and the second position relative to the second conductive piece, the first conductive piece is not in contact with the second conductive piece, and the battery cannot discharge through the self-discharge loop. When the first conductive piece is located at the third position relative to the second conductive piece, the first conductive piece and the second conductive piece are electrically connected to form a closed loop, so that the residual electric quantity of the battery can be consumed in a short time, namely, the self-discharging effect of the battery after use is achieved, and the danger of fire and the like caused by the fact that the battery accidentally forms the closed loop is avoided.
In one embodiment, the self-discharge loop further comprises a resistor; the resistor is electrically connected between the battery anode and the first conductive piece, or the resistor is electrically connected between the battery cathode and the second conductive piece.
In one embodiment, the battery further comprises a circuit board arranged in the shell, a separator is arranged on the circuit board, the first conductive piece and the second conductive piece are separated by the separator, and the first conductive piece is kept at a first position;
the first conductive piece has elasticity, and is elastically deformed under the action of external force and switched from a first position to a second position;
and after the external force acting on the first conductive member is removed, the first conductive member is switched and kept at the third position under the action of the self-elastic force.
In one embodiment, the first conductive member is in a bent sheet shape; the first conductive member has a first end electrically connected to the positive electrode of the battery, and a second end opposite to the first end for contact connection with the second conductive member.
In one embodiment, a groove is formed in the separator, a separation arm is formed on a side wall of the groove, and the first conductive member and the second conductive member are separated by the separation arm.
In one embodiment, the second end of the first conductive member overlaps the upper side of the partition arm, and the second conductive member is located at the lower side of the partition arm; the shell is provided with an insertion hole, and an acting element is inserted into the insertion hole and acts on the second end of the first conductive element, so that the second end of the first conductive element is bent downwards under the action of external force and is switched from the first position to the second position and is kept at the second position.
In one embodiment, the separating arm is provided with a stopper for preventing the first conductive member from contacting the second conductive member when sliding downwards.
In one embodiment, the tail end of the second end of the first conductive member is tilted upward, and a contact surface of the second conductive member, which is abutted to the first conductive member, is a curved surface which is concave upward.
In one embodiment, the battery further comprises a circuit board disposed within the housing, the circuit board having a separator disposed thereon; the first conductive member and the second conductive member are separated by the separator and hold the first conductive member at a first position;
the second conductive piece has elasticity, and the second conductive piece elastically deforms under the action of external force, so that the first conductive piece is switched from a first position to a second position relative to the second conductive piece;
after the external force acting on the second conductive piece is removed, the second conductive piece reduces elastic deformation under the action of the self elastic force, so that the first conductive piece is switched and kept at a third position relative to the second conductive piece.
The invention also provides an electric tool.
An electric tool comprising a housing, a battery mounting cavity provided in the housing for mounting a battery according to any one of claims 1 to 9, an action member provided in the battery mounting cavity for changing the relative positions of the first conductive member and the second conductive member;
when the battery is mounted on the electric tool, the first conductive piece is switched from a first position to a second position relative to the second conductive piece under the action of the action piece;
after the battery is detached from the electric tool, the acting force of the acting element is removed, and the first conductive element is switched and kept at a third position relative to the second conductive element.
In the electric tool, the shell is provided with the battery mounting cavity for mounting the battery provided by the invention, and the action piece for changing the relative position of the first conductive piece and the second conductive piece is arranged in the battery mounting cavity. After the action piece enables the battery to be taken out of the battery installation cavity, the acting force of the action piece is cancelled, the first conductive piece is switched to the third position relative to the second conductive piece, the first conductive piece is abutted to the second conductive piece to form a closed loop, so that the residual electric quantity of the battery is exhausted in a short time, and the self-discharging effect of the battery after use is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present invention.
Fig. 2 is an exploded view of the battery of fig. 1.
Fig. 3 is a partial structural view of the battery shown in fig. 1.
Fig. 4 is a circuit diagram of a self-discharge circuit of the battery shown in fig. 1.
Fig. 5 is a partial cross-sectional view of the battery of fig. 1 with the first conductive member in a first position relative to the second conductive member.
Fig. 6 is a partial cross-sectional view of the battery of fig. 1 with the first conductive member in a second position relative to the second conductive member.
Fig. 7 is a partial cross-sectional view of the battery of fig. 1 with the first conductive member in a third position relative to the second conductive member.
Figure 8 is a schematic structural view of a power tool according to an embodiment of the present invention,
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be directly electrically connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 7, a battery 100 according to an embodiment of the present invention includes a housing 110 and a self-discharge circuit 130. Specifically, the self-discharge circuit 130 includes a first conductive member 131 disposed in the casing 110 and electrically connected to the positive electrode of the battery 100, and a second conductive member 133 disposed in the casing 110 and electrically connected to the negative electrode of the battery 100.
The first conductive member 131 has a first position, a second position and a third position relative to the second conductive member 133. The first conductive member 131 is not in contact with the second conductive member 133 when in the first position and the second position. When the first conductive member 131 is located at the third position, it is electrically connected to the second conductive member 133.
The first conductive member 131 is switched from the first position to the second position by the external force, and is switched and maintained at the third position after the external force is removed.
When the first conductive member 131 is located at the first position and the second position with respect to the second conductive member 133, it does not contact the second conductive member 133, and the battery 100 is not discharged through the self-discharge circuit. When the first conductive member 131 is located at the third position relative to the second conductive member 133, it is in contact with the second conductive member 133 to form a closed loop, so that the residual electric quantity of the battery 100 can be consumed in a short time, that is, the self-discharge effect of the battery 100 after use is achieved, and the danger of fire and the like caused by the accidental formation of the closed loop by the battery 100 is avoided.
In this embodiment, the self-discharge loop 130 further includes a resistor 135. Specifically, in this embodiment, the resistor 135 is electrically connected between the negative electrode of the battery 100 and the second conductive member 133. The resistor 135 serves to consume the residual capacity of the battery 100. The resistor 135 has a resistance that depends on the amount of heat generated from the discharge circuit 130, and the resistor 135 is required to ensure that the resistor 135 does not cause a fire due to excessive heat generation. Similarly, resistor 135 may be electrically connected between the positive electrode of battery 100 and first conductive member 131.
Of course, the resistor 135 may not be provided if the resistances of the first conductive member 131 and the second conductive member 133 are large enough not to short the self-discharge circuit 130 and not to generate excessive heat.
In this embodiment, the self-discharge loop 130 includes a resistor 135. Similarly, two or more resistors 135 may be provided according to the amount of heat generated from the discharge circuit 130 and the resistance of the resistor 135.
In this embodiment, the first conductive member 131 has elasticity. The position of first conductive member 131 with respect to second conductive member 133 is switched by the elastic deformation of first conductive member 131.
Specifically, the battery 100 further includes a circuit board 150 disposed in the housing 110, and a separator 151 is disposed on the circuit board 150. First conductive member 131 is separated from second conductive member 133 by a partition 151, and first conductive member 131 is located at a first position with respect to second conductive member 133, as shown in fig. 5. The first conductive member 131 is elastically deformed by an external force and is located at a second position with respect to the second conductive member 133, as shown in fig. 6. After the external force acting on the first conductive member 131 is removed, the first conductive member 131 is switched and maintained at the third position by its own elastic force, that is, the first conductive member 131 abuts against the second conductive member 133, as shown in fig. 7.
Preferably, in this embodiment, the resistor 135, the first conductive member 131, the second conductive member 133, and the resistor 135 are all disposed on the circuit board 150, and are electrically connected to the positive and negative electrodes of the battery 100 through the circuit board 150.
Preferably, in this embodiment, the first conductive member 131 is in a bent sheet shape. The first conductive member 131 has a first end 1311 electrically connected to the positive electrode of the battery 100, and a second end 1313 opposite to the first end 1311 to be in contact connection with the second conductive member 133. The sheet-shaped first conductive member 131 needs a small external force for elastic deformation, and is easy to implement.
Preferably, in this embodiment, a groove 153 is formed on the partition 151, a partition wall 155 is formed on a sidewall of the groove 153, and the first conductive member 131 and the second conductive member 133 are separated by the partition wall 155.
Specifically, in this embodiment, the partition wall 155 is a cantilever, the second end 1313 of the first conductive member 131 overlaps the upper side of the partition wall 155, and the second conductive member 133 is located at the lower side of the partition wall 155. The housing 110 has a receptacle 111 therein, and an acting member is inserted into the receptacle 111 and acts on the second end 1313 of the first conductive member 131 to bend the second end 1313 of the first conductive member 131 downward by an external force, so that the first conductive member 131 is switched from the first position to the second position with respect to the second conductive member 133.
Preferably, the partition wall 155 is provided with a stopper 157 for preventing the first conductive member 131 from contacting the second conductive member 133 when it is bent downward.
In this embodiment, the stopper 157 has a plate shape. The stopper 157 may have other structures such as a rod shape and a cylindrical shape. Further, a plurality of stoppers 157 may be provided on the partition 111.
In this embodiment, the stopper 157 is integrally formed with the partition wall 155. Of course, the stop member 157 may be fixedly connected to the partition wall 155 by screwing, welding, etc.
Preferably, the tail end of the second end 1313 of the first conductive member 131 is tilted upward, and the contact surface 1331 of the second conductive member 133, which is in contact with the first conductive member 131, is a curved surface which is concave upward. Of course, the tail end of the second end 1313 of the first conductor 131 is lifted upwards to a degree corresponding to the contact surface 1331 being concaved upwards, so that the second end 1313 can be in contact connection with the second conductor 133. In this way, the second end 1313 of the first conductive member 131 can be effectively prevented from sliding off the contact surface 1331 of the second conductive member 133.
In another embodiment, the first conductive member 131 may be disposed at the lower side of the partition 155, and the second conductive member 133 may be disposed at the upper side of the partition 155, where the first conductive member 131 is located at the first position relative to the second conductive member 133. The second end 1313 of the first conductive member 131 is bent upward by an external force, and is switched from the first position to the second position; after the external force acting on the first conductive member 131 is removed, the first conductive member 131 is switched and maintained at the third position by its own elastic force. Preferably, the tail end of the second end 1313 of the first conductive member 131 tilts downward, which effectively prevents the first conductive member 131 from coming out of contact with the second conductive member 133.
In another embodiment, the partition 155 may be a beam provided on two opposite sidewalls of the groove 153.
It should be noted that, the position switching of the first conductive member relative to the second conductive member can also be realized through the elastic deformation of the second conductive member; and the position switching of the first conductive piece relative to the second conductive piece can be realized by the simultaneous elastic deformation of the first conductive piece and the second conductive piece.
Specifically, in another embodiment, the second conductive member has elasticity. The relative position switching between the second conductive piece and the first conductive piece is realized through the elastic deformation of the second conductive piece. Specifically, the first conductive member and the second conductive member are separated by the separator, and the first conductive member is kept at a first position; the second conductive piece generates elastic deformation under the action of external force, so that the first conductive piece is switched from a first position to a second position relative to the second conductive piece; after the external force acting on the second conductive piece is removed, the second conductive piece reduces elastic deformation under the action of the elastic force of the second conductive piece, so that the first conductive piece is switched relative to the second conductive piece and is kept at a third position.
In another embodiment, the first and second conductive members may be further separated by a first separation spacer disposed between the first and second conductive members, the first conductive member being located at a first position relative to the second conductive member. Specifically, a second separating sheet is arranged in a battery mounting cavity of the electric tool, when the battery is mounted on the electric tool, the first separating sheet moves under the pushing action of the second separating sheet until the battery is separated from the contact with the first conductive piece and the second conductive piece, at the moment, the first conductive piece and the second conductive piece are separated by the second separating sheet, and the first conductive piece is switched to a second position relative to the second conductive piece; after the second separating sheet is drawn out from the space between the first conductive piece and the second conductive piece, the first conductive piece and the second conductive piece are in contact connection, and the first conductive piece is switched and kept at a third position relative to the second conductive piece.
It should be noted that, in this embodiment, the first conductive member and/or the second conductive member has elasticity, and when the first conductive member and the second conductive member are separated by the first separation piece or the second separation piece, the first conductive member and/or the second conductive member elastically deforms, and the first conductive member is located at the first position or the second position relative to the second conductive member; the second separating sheet is drawn away from the space between the first conductive piece and the second conductive piece, when the first conductive piece and/or the second conductive piece are/is restored, the first conductive piece is in contact connection with the second conductive piece, and the first conductive piece is switched and kept at a third position relative to the second conductive piece.
It should be noted that, the first conductive component and the second conductive component may also implement the relative position conversion of the first conductive component and the second conductive component by other means, such as by moving the first conductive component or the second conductive component.
As shown in fig. 8, the present invention also provides an electric power tool 200. Specifically, the power tool 200 is a handle of the stapler, but may be other power tools using disposable batteries.
The power tool 200 includes a housing 210, a battery mounting cavity 211 is formed on the housing 210 for mounting the battery 100, and an acting member 213 is disposed in the battery mounting cavity 211 for changing a relative position of the first conductive member 131 and the second conductive member 133.
When the battery 100 is mounted on the power tool 200, the acting member 213 is inserted into the insertion hole 111 and acts on the second end 1313 of the first conductive member 131, and the first conductive member 131 is switched from the first position to the second position relative to the second conductive member 133 by the acting member 213. After the battery 100 is detached from the power tool 200, the acting member 213 is withdrawn from the insertion hole 111, the acting force on the first conductive member 131 is removed, and the first conductive member 131 is switched and maintained at the third position with respect to the second conductive member 133.
In the electric tool, the shell is provided with the battery mounting cavity for mounting the battery provided by the invention, and the action piece for changing the relative position of the first conductive piece and the second conductive piece is arranged in the battery mounting cavity. After the action piece enables the battery to be taken out of the battery installation cavity, the acting force of the action piece is cancelled, the first conductive piece is switched to the third position relative to the second conductive piece, the first conductive piece is abutted to the second conductive piece to form a closed loop, so that the residual electric quantity of the battery is exhausted in a short time, and the self-discharging effect of the battery after use is achieved.
Specifically, in the present embodiment, the acting element 213 is a pressing element for driving the first conductive element 131 to elastically deform.
In this embodiment, the acting element 213 has a rectangular parallelepiped shape. Of course, the acting element 213 may have other structures, such as an ellipsoid, which can drive the second end 1313 of the first conductive element 131 to elastically deform.
Of course, if the second conductive member of the discharge loop has elasticity, the relative position of the first conductive member and the second conductive member is switched by the elastic deformation of the second conductive member, and the pressing member is used for driving the second conductive member to elastically deform.
In further embodiments, if the first and second electrically-conductive members are separated by a first separator, the acting member is a second separator disposed within the battery mounting cavity. The second separating sheet is used for separating the first conductive member and the second conductive member instead of the first separating sheet while pushing the first separating sheet to move.
The battery is provided with a self-discharge loop, and the self-discharge loop comprises a first conductive piece electrically connected with the positive electrode of the battery and a second conductive piece electrically connected with the negative electrode of the battery. When the battery is not used or is installed on the electric tool, the first conductive piece is not contacted with the second conductive piece, and the battery can not be discharged through the self-discharging loop. After the battery is disassembled from the electric tool, the first conductive piece and the second conductive piece are contacted and connected to form a closed loop, so that the residual electric quantity of the battery can be consumed in a short time, the self-discharging effect of the battery after use is achieved, and the danger of fire and the like caused by the fact that the battery accidentally forms the closed loop is avoided.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A battery, comprising: a housing and a self-discharge circuit;
the self-discharge loop comprises a first conductive piece which is arranged in the shell and is electrically connected with the positive electrode of the battery, and a second conductive piece which is arranged in the shell and is electrically connected with the negative electrode of the battery;
the first conductive member has a first position, a second position, and a third position relative to the second conductive member; when the first conductive piece is positioned at the first position and the second position, the first conductive piece is not contacted with the second conductive piece; when the first conductive piece is positioned at a third position, the first conductive piece is electrically connected with the second conductive piece;
the first conductive piece is switched from the first position to the second position under the promotion of external force, and is switched and kept at the third position after the external force is cancelled.
2. The battery of claim 1, wherein the self-discharge loop further comprises a resistor; the resistor is electrically connected between the battery anode and the first conductive piece, or the resistor is electrically connected between the battery cathode and the second conductive piece.
3. The battery of claim 1, further comprising a circuit board disposed within the housing, the circuit board having a separator disposed thereon, the first and second conductive members being separated by the separator and maintaining the first conductive member in the first position;
the first conductive piece has elasticity, and is elastically deformed under the action of external force and switched from a first position to a second position;
and after the external force acting on the first conductive member is removed, the first conductive member is switched and kept at the third position under the action of the self-elastic force.
4. The battery of claim 3, wherein the first conductive member is in the form of a bent sheet; the first conductive member has a first end electrically connected to the positive electrode of the battery, and a second end opposite to the first end for contact connection with the second conductive member.
5. The battery of claim 4, wherein the separator has a groove, a separation arm is disposed on a sidewall of the groove, and the first conductive member and the second conductive member are separated by the separation arm.
6. The battery of claim 5, wherein the second end of the first conductive member overlaps the upper side of the separator arm and the second conductive member is located at the lower side of the separator arm; the shell is provided with an insertion hole, and an acting element is inserted into the insertion hole and acts on the second end of the first conductive element, so that the second end of the first conductive element is bent downwards under the action of external force and is switched from the first position to the second position and is kept at the second position.
7. The battery of claim 5, wherein the separating arm is provided with a stopper for preventing the first conductive member from contacting the second conductive member when sliding downward.
8. The battery of claim 6, wherein the tail end of the second end of the first conductive member is tilted upward, and a contact surface of the second conductive member abutting against the first conductive member is a curved surface which is concave upward.
9. The battery of claim 1, further comprising a circuit board disposed within the housing, the circuit board having a separator disposed thereon; the first conductive member and the second conductive member are separated by the separator and hold the first conductive member at a first position;
the second conductive piece has elasticity, and the second conductive piece elastically deforms under the action of external force, so that the first conductive piece is switched from a first position to a second position relative to the second conductive piece;
after the external force acting on the second conductive piece is removed, the second conductive piece reduces elastic deformation under the action of the self elastic force, so that the first conductive piece is switched and kept at a third position relative to the second conductive piece.
10. An electric tool comprising a housing, a battery mounting cavity provided in the housing for mounting a battery according to any one of claims 1 to 9, an action member provided in the battery mounting cavity for changing the relative positions of the first conductive member and the second conductive member;
when the battery is mounted on the electric tool, the first conductive piece is switched from a first position to a second position relative to the second conductive piece under the action of the action piece;
after the battery is detached from the electric tool, the acting force of the acting element is removed, and the first conductive element is switched and kept at a third position relative to the second conductive element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711387817.9A CN108110271B (en) | 2017-12-20 | 2017-12-20 | Battery and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711387817.9A CN108110271B (en) | 2017-12-20 | 2017-12-20 | Battery and electric tool |
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| Publication Number | Publication Date |
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| CN108110271A CN108110271A (en) | 2018-06-01 |
| CN108110271B true CN108110271B (en) | 2020-01-10 |
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| CN201711387817.9A Active CN108110271B (en) | 2017-12-20 | 2017-12-20 | Battery and electric tool |
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| WO2022001953A1 (en) * | 2020-07-03 | 2022-01-06 | 苏州英途康医疗科技有限公司 | Battery pack with self-discharge function and electric tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008047516A (en) * | 2006-07-20 | 2008-02-28 | Hama System:Kk | Connector for battery discharge countermeasure |
| CN201112528Y (en) * | 2007-10-31 | 2008-09-10 | 赖国荣 | Hand-held charging device for electric tool |
| CN206312997U (en) * | 2017-01-09 | 2017-07-07 | 东莞市益通电子科技有限公司 | A kind of battery tray of spring auxiliary contacts |
| CN206574749U (en) * | 2017-02-22 | 2017-10-20 | 中山市达兴塑料电器有限公司 | Battery temperature protection cover plate |
| CN206574750U (en) * | 2017-02-22 | 2017-10-20 | 中山市达兴塑料电器有限公司 | Can self discharge battery cover plate |
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