CN212887455U - Battery pack and electric tool - Google Patents
Battery pack and electric tool Download PDFInfo
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- CN212887455U CN212887455U CN202022052618.6U CN202022052618U CN212887455U CN 212887455 U CN212887455 U CN 212887455U CN 202022052618 U CN202022052618 U CN 202022052618U CN 212887455 U CN212887455 U CN 212887455U
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- battery
- terminal
- battery pack
- battery unit
- switching terminal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a battery package and electric tool. The battery pack comprises a positive terminal, a negative terminal, a switch device, a first battery unit and a second battery unit, wherein the first battery unit and the second battery unit are composed of different numbers of battery cells, the number of the battery cells of the second battery unit is smaller than that of the battery cells of the first battery unit, the switch device comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive terminal, the fixed connecting terminals are electrically connected to the first battery unit or the second battery unit respectively, and the other end of the switching terminal is switched to be closed with any fixed connecting terminal to output at least two different voltages. The utility model discloses a switch of a plurality of voltages is realized through switching device, simple structure, and the switching is convenient.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a technical field of lithium cell especially relates to a can be applied to battery package and electric tool of different voltage platforms.
[ background of the invention ]
With the development of lithium batteries, lithium electric tools are more and more widely used, but different electric tools have different rated working voltages, and therefore, a corresponding battery pack needs to be configured for each electric tool. When a user uses a plurality of different tools, the user needs to be equipped with a plurality of corresponding battery packs, the carrying is inconvenient, a single battery can only be suitable for corresponding platforms, the utilization rate of the battery is not high, and the unused tools are required to occupy a large space for storing a plurality of battery packs, so that the battery packs are easy to be confused.
Please refer to chinese patent application No. CN102554885B published on 11/18/2015, which discloses a battery having a first configuration mode in which three battery cells are connected in series to output a first operating voltage, and a second configuration mode in which four battery cells are connected in series to output a second operating voltage, wherein the battery has no switching device for directly switching the voltages, and has no reminding device at different output voltages, and thus the safety is not high.
[ Utility model ] content
To the not enough of prior art, the utility model aims to provide a battery package and electric tool that voltage switching is convenient and the security is high.
The utility model provides a prior art problem can adopt following technical scheme: the method comprises the following steps: a shell, a positive terminal, a negative terminal, a circuit board arranged in the shell and a plurality of battery cells, wherein the positive electrode of one battery cell is connected with the negative electrode of another battery cell to form a battery pack, the negative terminal is electrically connected to the negative electrode of the last cell of the battery pack, the battery pack has a switching device, the battery pack comprises a first battery unit and a second battery unit which are formed by different numbers of battery cells, and the number of cells of the second battery unit is smaller than the number of cells of the first battery unit, the switching device comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive terminal, the fixed connection terminals are electrically connected to the first battery unit or the second battery unit respectively, and at least two different voltages are output by switching the other end of the switching terminal to be closed with any one of the fixed connecting terminals.
The further improvement scheme is as follows: the battery pack is provided with a voltage detection terminal which is respectively connected with the anode of each battery cell.
The further improvement scheme is as follows: the switching terminal is correspondingly provided with a shifting knob on the shell, and the shifting knob protrudes out of the shell.
The further improvement scheme is as follows: each battery cell is formed by a plurality of single-row batteries connected in series or formed by a plurality of rows of batteries connected in series.
The utility model provides a prior art problem still can adopt following technical scheme: an electric power tool includes: main casing body, install in motor and controller in the main casing body, the battery package includes: the battery pack comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive terminal, the fixed connecting terminals are respectively and electrically connected to the first battery unit or the second battery unit, the other end of the switching terminal is closed with any one of the fixed connecting terminals by stirring to output at least two different voltages, and the electric tool has an allowable working voltage, the controller controls the battery pack to be connected with the electric tool in a matched mode by shifting the switching terminal to select the output voltage corresponding to the allowable working voltage.
The further improvement scheme is as follows: the controller detects the voltage value of each battery cell, and when the voltage difference between any two battery cells exceeds a preset voltage value, the controller controls the electric tool to be disconnected from the battery pack.
The further improvement scheme is as follows: the predetermined voltage value is 0.5V.
The further improvement scheme is as follows: the switching terminal of the battery pack is correspondingly provided with a shifting knob on the shell, the shifting knob protrudes out of the shell, and the shell of the electric tool is provided with a groove matched with the shifting knob.
Compared with the prior art, the utility model discloses following beneficial effect has: the battery pack comprises a first battery unit and a second battery unit, wherein the first battery unit and the second battery unit are composed of a switch device and battery cells with different numbers, the number of the battery cells of the second battery unit is smaller than that of the battery cells of the first battery unit, the switch device comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive terminal, the fixed connecting terminals are electrically connected to the first battery unit or the second battery unit respectively, and at least two different voltages are output by toggling the other end of the switching terminal to be closed with any one of the fixed connecting terminals.
[ description of the drawings ]
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
fig. 1 is a schematic view of a battery pack according to the present invention;
fig. 2a and 2b are schematic diagrams of a battery pack of the present invention;
fig. 3a and 3b are discharge circuit diagrams of the battery pack according to the present invention;
fig. 4 is a charging circuit diagram of the battery pack of the present invention.
The meaning of the reference symbols in the figures:
100. the battery pack 101, the housing 102, the battery pack 103, the circuit board 1031, the positive terminal 1032, the negative terminal 1033, the first voltage detection terminal 1034, the second voltage detection terminal 1035, the third voltage detection terminal 1036, the temperature detection terminal 104, the switching device 1041, the first fixed connection terminal 1042, the second fixed connection terminal 105, the fixing frame 1, the first cell 2, the second cell 3, the third cell 4, the fourth cell 11, the first connection piece 12, the second connection piece 13, the third connection piece 14, the fourth connection piece 15, the fifth connection piece 200, 200', the electric tool 201, 201', the temperature detection receiving terminal 202, 202', the controller 203, the third voltage detection receiving terminal 300, and the charging device
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, fig. 2a and fig. 2b, a battery pack 100 according to the present invention includes a housing 101, a battery pack 102 and a circuit board 103, which are installed in the housing 101 and are formed by a plurality of battery cells, and an electrical connection terminal and a switch device 104 installed in the housing 101. Connecting pieces are installed on the positive electrode and the negative electrode of each battery cell, the positive electrode of one battery cell is connected with the negative electrode of the other battery cell through the connecting pieces, the battery pack 102 comprises a first battery unit and a second battery unit which are composed of battery cells with different numbers, the number of the battery cells of the second battery unit is smaller than that of the battery cells of the first battery unit, the switch device 104 comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive electrode terminal, the fixed connecting terminals are electrically connected to the first battery unit or the second battery unit respectively, and the other end of the switching terminal is closed with any one fixed connecting terminal through shifting to output at least two different voltages.
Referring to fig. 2a, fig. 2b, fig. 3a, and fig. 3b, the battery pack 102 includes a plurality of battery cells and a fixing frame 105, in this embodiment, the battery pack 102 includes four battery cells, which are a first battery cell 1, a second battery cell 2, a third battery cell 3, and a fourth battery cell 4, and a positive electrode and a negative electrode of each battery cell are arranged in the fixing frame 105 in a mutually staggered manner, a negative electrode of the first battery cell 1 is electrically connected to a first connecting piece 11, a positive electrode of the first battery cell 1 is electrically connected to a negative electrode of the second battery cell 2 through a second connecting piece 12, a positive electrode of the second battery cell 2 is electrically connected to a negative electrode of the third battery cell 3 through a third connecting piece 13, a positive electrode of the third battery cell 3 is electrically connected to a negative electrode of the fourth battery cell 4 through a fourth connecting piece 14, and a positive electrode of the fourth battery cell 4 is electrically connected to a fifth connecting. The battery pack 102 is provided with a circuit board 103, the circuit board 103 is electrically connected with an electric terminal, the electric terminal comprises a positive terminal 1031, a negative terminal 1032, a first resistor R1, a second resistor R2, a second voltage detection terminal 1034, a third voltage detection terminal 1035 and a temperature detection terminal 1036, the first voltage detection terminal 1033 is connected to the positive pole of the first battery cell 1, the second voltage detection terminal 1034 is connected to the positive pole of the second battery cell 2, the third voltage detection terminal 1035 and the temperature detection terminal 1036 are connected to the positive pole of the third battery cell 3, the voltage detection terminals are used for detecting the voltage of each battery cell, and the temperature detection terminal 1036 detects the temperature of the battery pack.
The switch device 104 includes a switching terminal and at least two fixed connection terminals, the at least two fixed connection terminals are electrically connected to the connection pad, the switching terminal can be switched at least at two positions, and selectively closed with any one of the fixed connection terminals to output at least two different voltages. In this embodiment, the first battery unit is formed by connecting four battery cells in series, the second battery unit is formed by connecting three battery cells in series, the switch device 104 is a single-pole double-throw switch, and includes a switching terminal, a first fixed connection terminal 1041 and a second fixed connection terminal 1042, one end of the switching terminal is electrically connected to the positive terminal 1031, the negative terminal 1032 is electrically connected to the negative electrode of the last battery cell in series, that is, the negative terminal 1032 is electrically connected to the negative electrode of the first battery cell 1 through the first connection piece 11, and the first fixed connection terminal 1041 is electrically connected to the positive electrode of the fourth battery cell 4 through a fifth connection piece 15, so as to form a first battery unit; the second fixed connection terminal 1042 is electrically connected to the third cell 3 and the fourth cell 4 through a fourth connection piece 14, so as to form a second battery unit. The switch terminal is in the casing 101 is last to have a dial knob correspondingly, dial the knob and can switch between first position and second position, first position is corresponding to switch the terminal with first fixed connection terminal 1041 is closed, the second position is corresponding to switch the terminal with second fixed connection terminal 1042 is closed. In this embodiment, the nominal voltage of each battery cell is 4V, and may be composed of a single row of batteries formed by connecting a plurality of single batteries in series or a plurality of rows of batteries formed by connecting a plurality of single batteries in series, the capacity of the battery cell is changed, and when the dial knob is dialed to the first position, the battery pack 100 outputs 16V voltage; when the dial knob is dialed to the second position, the battery pack 100 outputs 12V voltage. Of course, the second fixed connection terminal 1042 can also be electrically connected to the second battery cell 2 and the third battery cell 3 through the third connection piece 13 to form a second battery unit, which can output 8V voltage; or the second connecting sheet 12 is electrically connected to the first battery cell 1 and the second battery cell 2 to form a second battery unit, and 4V voltage can be output. The dial knob protrudes out of the housing 101, and the housing of the electric tool 200 and the housing of the charging device 300 connected to the battery pack 100 are provided with grooves adapted to the position of the dial knob, so that when the output voltage of the battery pack 100 is not matched with the allowable working voltage of the electric tool 200, the battery pack 100 and the electric tool 200 cannot be mounted.
Taking the battery pack 100 with adjustable voltage of 12V and 16V as an example, the battery pack 100 is detachably connected to the electric tool, and the electric tool includes: the battery pack 100 is turned to 16V to match with the 16V electric tool 200, as shown in fig. 3a, the electric tool 200 includes a positive electrode, a negative electrode, a third voltage detection receiving terminal 203, a temperature detection terminal 201, a first switch K1 connected to the positive electrode, and a controller 202. When a user dials a battery pack to 12V for use, and then dials to 16V for discharging, the controller 202 of the 16V battery pack detects and calculates voltage values of the first battery cell 1, the second battery cell 2, and the third battery cell 3 through the third voltage detection receiving terminal 203 and the negative electrode, detects a voltage value of the fourth battery cell through the positive electrode, and calculates a voltage difference between the battery cells, if the voltage difference exceeds a predetermined voltage value, if the predetermined voltage value is 0.5V, the controller 202 controls the first switch K1 to be turned off, and the electric tool 200 is disconnected from the battery pack 100. When the battery pack 100 is shifted to 12V to match the 12V electric tool 200', as shown in fig. 3b, the electric tool 200' includes a positive electrode, a negative electrode, a temperature detection receiving terminal 201', a first switch K1' connected to the positive electrode, and a controller 202', the controller 202' detects the voltage of the battery pack 100 through the positive electrode and the negative electrode and calculates a single cell voltage value, when the single cell voltage value is smaller than an under-voltage protection voltage value, such as 2.5V, the controller 202' controls the first switch K1' to be disconnected, and the electric tool 200' is disconnected from the battery pack 100.
Referring to fig. 4, in order to provide a charging circuit diagram of the battery pack 100 of the present invention, the charging device 300 includes at least two charging control modules, in this embodiment, taking the battery pack 100 with adjustable voltages of 12V and 16V as an example, when the battery pack 100 is charged, the button of the battery pack 100 is turned to a position with the maximum voltage, such as a 16V position, the charging device 300 includes a 12V charging control module for charging the first to third electric cores 3 and a 4V charging control module for charging the fourth electric core 4, the charging device 300 includes voltage detection receiving terminals connected to the first voltage detection terminal 1033, the second voltage detection terminal 1034 and the third voltage detection terminal 1035 of the battery pack 100, the 4V charging control module includes a second switch K2, the 12V charging module includes a third switch K3, the charging control module detects the voltage value of each battery cell through the voltage detection receiving terminal, and when any battery cell voltage value exceeds a full electricity voltage value, the charging control module controls the second switch K2 and the third switch K3 to be disconnected, and the charging device 300 is disconnected from the battery pack 100.
The utility model discloses a battery package 100 has first battery unit and the second battery unit that switching device, different quantity electric core constitute, just the electric core quantity of second battery unit is less than the electric core quantity of first battery unit, switching device is including switching terminal and two at least fixed connection terminal, switching terminal one end connect in positive terminal, fixed connection terminal electricity respectively connect in first battery unit or second battery unit, through stirring the other end of switching terminal is in order to be closed with arbitrary fixed connection terminal, exports two at least different voltages, and this switching device simple structure, and it is convenient to switch.
The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many other alternatives to the battery pack and power tool of the present invention may be made without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.
Claims (8)
1. A battery pack, comprising: the battery comprises a shell, a positive terminal, a negative terminal, a circuit board and a plurality of battery cells, wherein the circuit board and the battery cells are arranged in the shell; the method is characterized in that: the battery pack is provided with a switch device, the battery pack comprises a first battery unit and a second battery unit, the first battery unit and the second battery unit are composed of battery cells with different numbers, the number of the battery cells of the second battery unit is smaller than that of the battery cells of the first battery unit, the switch device comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive terminal, the fixed connecting terminals are electrically connected to the first battery unit or the second battery unit respectively, and the other end of the switching terminal is closed with any one of the fixed connecting terminals by shifting to output at least two different voltages.
2. The battery pack according to claim 1, wherein: the battery pack is provided with a voltage detection terminal which is respectively connected with the anode of each battery cell.
3. The battery pack according to claim 2, wherein: the switching terminal is correspondingly provided with a shifting knob on the shell, and the shifting knob protrudes out of the shell.
4. The battery pack according to claim 3, wherein: each battery cell is formed by a plurality of single-row batteries connected in series or formed by a plurality of rows of batteries connected in series.
5. A power tool removably connectable with a battery pack, comprising: main casing body, install in motor and controller in the main casing body, the battery package includes: the battery pack comprises a switching terminal and at least two fixed connecting terminals, one end of the switching terminal is connected to the positive terminal, the fixed connecting terminals are respectively and electrically connected to the first battery unit or the second battery unit, and the other end of the switching terminal is switched to be closed with any one of the fixed connecting terminals to output at least two different voltages; the method is characterized in that: the electric tool is provided with an allowable working voltage, the output voltage corresponding to the allowable working voltage is selected by toggling the switching terminal, and the controller controls the battery pack to be connected with the electric tool in a matched mode.
6. The power tool of claim 5, wherein: the controller detects the voltage value of each battery cell, and when the voltage difference between any two battery cells exceeds a preset voltage value, the controller controls the electric tool to be disconnected from the battery pack.
7. The power tool of claim 6, wherein: the predetermined voltage value is 0.5V.
8. The power tool of claim 7, wherein: the switching terminal of the battery pack is correspondingly provided with a shifting knob on the shell, the shifting knob protrudes out of the shell, and the shell of the electric tool is provided with a groove matched with the shifting knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022052618.6U CN212887455U (en) | 2020-09-17 | 2020-09-17 | Battery pack and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022052618.6U CN212887455U (en) | 2020-09-17 | 2020-09-17 | Battery pack and electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212887455U true CN212887455U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022052618.6U Active CN212887455U (en) | 2020-09-17 | 2020-09-17 | Battery pack and electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212887455U (en) |
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2020
- 2020-09-17 CN CN202022052618.6U patent/CN212887455U/en active Active
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