Dual-output-mode battery pack and electric tool applying same
By designing a dual-output mode battery pack, flexible switching of power tool voltage mode is achieved, which solves the difference in voltage requirements of different power tools, and improves user convenience and versatility of battery packs.
Patent Information
- Application Number
- CN202510751724.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-06
- Publication Date
- 2025-07-22
Smart Images
Figure CN120357059A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery packs, and more particularly to a dual-output mode battery pack and a power tool using the same. Background Art
[0002] With the wide application of power tools, lithium battery packs have become the mainstream power source due to their high energy density, light weight and environmental protection characteristics. Currently, the power tool battery packs on the market generally adopt a fixed voltage output design, that is, the output voltage is determined by the series-parallel connection of battery cells during production (such as 12V, 18V, 20V, etc.), and this voltage remains constant throughout the life cycle. As previously applied by our company, the publication number is CN216928696U, a linkage type battery pack, which includes a housing, a light strip and a switch for turning on and off the light strip. A button for pressing the switch is provided on the housing, a clamping plate for connecting with a power tool is provided on the housing, and a linkage member for driving the button to move towards the switch is provided on the clamping plate.
[0003] However, due to differences in power requirements, motor designs and working scenarios of different power tools, there are significant differences in the input voltages. For example, small hand-held drills mostly use 12V voltage, while high-power tools such as saws and angle grinders often require 18V or 20V voltage to drive. This results in that when users use multiple power tools, they must separately equip corresponding battery packs for each voltage specification. For example, a user who uses a drill, a saw and a lawn mower at the same time needs to carry three battery packs of 12V, 18V and 20V, which not only increases the purchase cost, but also significantly increases the carrying burden, especially in mobile scenarios such as outdoor work and high-altitude work. Summary of the Invention
[0004] To solve the above technical problems, the present application provides a dual-output mode battery pack, which has the advantage of being able to output two voltage modes, so that the same type of battery pack can meet the usage requirements, and thus there is no need to reserve battery packs with different voltages, thereby improving the convenience of use for personnel.
[0005] To achieve the above object, the technical solution of the present invention is as follows: A dual-output mode battery pack, comprising a housing; A first battery pack and a second battery pack disposed within a housing, the first battery pack being provided with a first positive electrode contact and a first negative electrode contact; the second battery pack being provided with a second positive electrode contact and a second negative electrode contact; a circuit board, the circuit board being provided with a battery output interface for the battery pack; the battery output interface including a first positive terminal, a second positive terminal, and a third positive terminal, as well as a first negative terminal, a second negative terminal, and a third negative terminal; the first positive terminal and the second positive terminal being electrically connected to the first positive electrode contact, the third positive terminal being electrically connected to the second positive electrode contact; the first negative terminal and the second negative terminal being electrically connected to the second negative electrode contact, the third negative terminal being electrically connected to the first negative electrode contact.
[0006] Implementing the above technical solution, even when there is a low-voltage usage requirement, when the power-off interface of the high-voltage power tool is inserted into the battery output interface, the positive electrode of the power-taking interface of the power tool only needs to be connected to the first positive terminal and the third positive terminal simultaneously, and the potential is the same as A+ and B+; the negative electrode of the power-taking interface only needs to be connected to the first negative terminal and the third negative terminal simultaneously, and the potential is the same as A- and B-. At this time, it is equivalent to connecting the first battery pack and the second battery pack in parallel to supply power to the power tool together, that is, the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 20V power supply is achieved; when there is a high-voltage usage requirement, as long as the positive electrode of the power-taking interface of the power tool is connected to the third positive terminal, the negative electrode of the power-taking interface is connected to the third negative terminal, and a metal sheet is provided inside the power-taking interface to connect the second positive terminal and the second negative terminal. At this time, the potential of the positive electrode of the power-taking interface is B+, the potential of the negative electrode of the power-taking interface is A-, and the second positive terminal A+ is connected to the second negative terminal B-, thereby enabling the first battery pack and the second battery pack to form a series battery pack of B+—B—A+—A-, and the supply voltage is the series voltage of two battery packs. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 40V power supply is achieved, and the effect of high-voltage supply is further achieved, so that the same battery pack can meet the usage requirements of different voltages, and thus there is no need to reserve battery packs of different voltages, thereby improving the convenience of use for personnel.
[0007] As a preferred solution of the present application, the first positive terminal and the second positive terminal are arranged side by side horizontally, and the first positive terminal and the third positive terminal are arranged side by side vertically; the first negative terminal and the second negative terminal are arranged side by side horizontally, and the first negative terminal and the third negative terminal are arranged side by side vertically.
[0008] Implementing the above technical solution, even if the power-taking interface of the power tool only needs to be set as a vertical insertion of straight metal sheets, the first positive terminal and the third positive terminal can be connected while ensuring that the second positive terminal is not connected to the first positive terminal or the second positive terminal. Similarly, the first negative terminal, the second negative terminal, and the third negative terminal are the same as the positive terminals; that is, the smoothness of installation is ensured, and at the same time, the stability and reliability of the battery pack voltage switching between 20V and 40V are ensured.
[0009] As a preferred solution of the present application, both the first battery pack and the second battery pack include a plurality of battery cells and aluminum sheets for connecting the battery cells in series or in parallel.
[0010] Implementing the above technical solution, when the effective capacity of one of the battery packs decays too much, it can be replaced, or one of the damaged battery cells can be replaced to ensure the normal function of the overall lithium battery pack.
[0011] As a preferred solution of the present application, a battery cell mounting rack is provided inside the housing. The battery cell mounting rack includes a pair of mounting plates, and a plurality of positioning grooves for embedding the battery cells are provided inside the mounting plates.
[0012] Implementing the above technical solution, the battery cell mounting rack includes a pair of mounting plates, and a plurality of positioning grooves for embedding the battery cells are provided inside the mounting plates. That is, the two ends of the battery cell are clamped and fixed in the positioning grooves through the mounting plates, and a heat dissipation space is left between the battery cells to prevent the battery cells from overheating.
[0013] As a preferred solution of the present application, data acquisition lines are provided in both the first battery pack and the second battery pack. Each data acquisition line is electrically connected to a circuit board, and the circuit board further includes data output terminals electrically connected to the data acquisition lines.
[0014] Implementing the above technical solution, corresponding data acquisition metal sheets can be provided on the power tool to be connected to the data output terminals, so that the power tool can monitor signals such as the voltage and temperature of the battery pack in real time, so that when the battery pack is at a high temperature, the power tool automatically stops working to prevent damage to the battery pack.
[0015] As a preferred solution of the present application, the four corners of the circuit board are respectively connected to the first positive contact, the first negative contact, the second positive contact, and the second negative contact through metal pole pieces.
[0016] Implementing the above technical solution, the connection points of the positive and negative poles of the first battery pack and the second battery pack to the circuit board are located at the four corners of the circuit board and are far away from each other, so that the heat generated by the current is evenly distributed on the circuit board, thereby reducing the occurrence of overheating caused by heat concentration.
[0017] As a preferred solution of the present application, circuit daughter boards are further provided on both sides of the circuit board, and indicator lights for displaying the battery level are provided on the daughter boards.
[0018] The above technical solution is implemented to facilitate personnel to visually monitor whether the battery pack needs to be replaced.
[0019] The present application further provides a power tool, including a battery pack and a power tool body. A card seat electrically connected to the battery pack is provided on the power tool body to enable the battery pack to supply electric energy to the tool body.
[0020] As a preferred solution of the present application, the card seat includes a base, and a main positive connection piece and a main negative connection piece are provided on the base; when the battery pack is installed on the card seat, both the first positive terminal and the third positive terminal are in contact connection with the main positive connection piece, and both the first negative terminal and the third negative terminal are in contact connection with the main negative connection piece.
[0021] The above technical solution is implemented, so that the main positive connection piece of the power tool is simultaneously connected to the first positive terminal and the third positive terminal, and the potential is the same as A+ and B+; the main negative connection piece is simultaneously connected to the first negative terminal and the third negative terminal, and the potential is the same as A- and B-. At this time, it is equivalent to connecting the first battery pack and the second battery pack in parallel to jointly supply power to the power tool, that is, the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 20V power supply is achieved. At the same time, a pair of data connection pieces for respectively inserting into the data output terminals are also provided on the base, so that while supplying energy, the power tool can obtain the working conditions of the battery pack in real time to ensure normal use.
[0022] As a preferred solution of the present application, the card seat includes a base, and a main positive connection piece, a main negative connection piece, a secondary positive connection piece, a secondary negative connection piece and a series metal piece connecting the secondary positive connection piece and the secondary negative piece are provided on the base; when the battery pack is installed on the card seat, all three positive terminals are in contact connection with the main positive connection piece, the third negative terminal is in contact connection with the main negative connection piece, the secondary positive connection piece is in contact connection with the second positive terminal, and the secondary negative connection piece is in contact connection with the second negative terminal.
[0023] To implement the above technical solution, when the battery pack is clamped on the card seat of the power tool, the total positive connection piece is connected to the third positive terminal, the total negative connection piece is connected to the third negative terminal, and the secondary positive connection piece is connected to the second positive terminal, the secondary negative connection piece is connected to the second negative terminal, and the secondary positive connection piece and the secondary negative plate are connected by a series metal piece, so that the second positive terminal is connected to the second negative terminal. At this time, the potential of the total positive connection piece is B+, the potential of the total negative connection piece is A-, and the second positive terminal A+ is connected to the second negative terminal B-, thereby enabling the first battery pack and the second battery pack to form a series battery pack of B+—B—A+—A-, and the power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 40V power supply is achieved, and then the effect of high voltage supply is achieved to meet the 40V power consumption requirement of the power tool.
[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. When there is a low-voltage usage requirement, when the power-off interface of the high-voltage power tool is inserted into the battery output interface, the positive electrode of the power-taking interface of the power tool only needs to be connected to the first positive terminal and the third positive terminal at the same time, and the potential is the same as A+ and B+; the negative electrode of the power-taking interface only needs to be connected to the first negative terminal and the third negative terminal at the same time, and the potential is the same as A- and B-. At this time, it is equivalent to connecting the first battery pack and the second battery pack in parallel to supply power to the power tool together, that is, the power supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 20V power supply is achieved; when there is a high-voltage usage requirement, as long as the positive electrode of the power-taking interface of the power tool is connected to the third positive terminal, the negative electrode of the power-taking interface is connected to the third negative terminal, and the second positive terminal is connected to the second negative terminal through a metal piece arranged inside the power-taking interface. At this time, the potential of the positive electrode of the power-taking interface is B+, the potential of the negative electrode of the power-taking interface is A-, and the second positive terminal A+ is connected to the second negative terminal B-, thereby enabling the first battery pack and the second battery pack to form a series battery pack of B+—B—A+—A-, and the power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 40V power supply is achieved, and then the effect of high voltage supply is achieved. Therefore, it has the advantage of being able to output two voltage modes, so that the same type of battery pack can meet the usage requirements, and thus there is no need to reserve battery packs with different voltages, improving the convenience of personnel use. Description of the Drawings
[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0026] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present application.
[0027] Figure 2 It is a schematic diagram of the internal structure of the housing in Embodiment 1 of the present application.
[0028] Figure 3 It is a schematic diagram of the structure of the circuit board part in Embodiment 1 of the present application.
[0029] Figure 4 It is a schematic diagram of the structure of the battery pack part in Embodiment 1 of the present application.
[0030] Figure 5 It is a schematic diagram of the structure of the battery output interface in Embodiment 1 of the present application.
[0031] Figure 6 It is a schematic diagram of the connection structure of Embodiment 2 of the present application.
[0032] Figure 7 It is a schematic diagram of the connection structure of Embodiment 3 of the present application.
[0033] Reference signs: 1, housing; 2, first battery pack; 21, first positive electrode contact; 22, first negative electrode contact; 3, second battery pack; 31, second positive electrode contact; 32, second negative electrode contact; 4, circuit board; 41, circuit sub-board; 42, display lamp; 5, battery output interface; 51, first positive terminal; 52, second positive terminal; 53, third positive terminal; 54, first negative terminal; 55, second negative terminal; 56, third negative terminal; 57, data output terminal; 6, battery cell; 7, aluminum sheet; 8, data acquisition line; 9, mounting plate; 101, base; 102, main positive connection piece; 103, main negative connection piece; 104, secondary positive connection piece; 105, secondary negative connection piece; 106, series metal piece. Detailed implementation manners
[0034] The following will further elaborate on the present application in conjunction with the attached Figure 1-7 drawings.
[0035] Embodiment 1 The embodiment of the present application discloses a battery pack with a dual output mode. Referring to Figure 1 , the battery pack with a dual output mode includes a housing 1; The first battery pack 2 and the second battery pack 3 are arranged inside the housing 1. The first battery pack 2 is provided with a first positive electrode contact 21 and a first negative electrode contact 22; the second battery pack 3 is provided with a second positive electrode contact 31 and a second negative electrode contact 32. That is, the first battery pack 2 and the second battery pack 3 supply electrical energy outward through their own positive and negative electrode contacts respectively. For easy understanding, the potential of the first positive electrode contact 21 is A+, the potential of the first negative electrode contact 22 is A-, the potential of the second positive electrode contact 31 is B+, and the potential of the first negative electrode contact 22 is B-.
[0036] It further includes a circuit board 4. The circuit board 4 is provided with a battery output interface 5 connected to the first battery pack 2 and the second battery pack 3; that is, electrical energy is supplied to the power tool that needs electricity through the battery output interface 5.
[0037] The battery output interface 5 includes a first positive terminal 51, a second positive terminal 52 and a third positive terminal 53, as well as a first negative terminal 54, a second negative terminal 55 and a third negative terminal 56; both the first positive terminal 51 and the second positive terminal 52 are electrically connected to the first positive electrode contact 21, and the third positive terminal 53 is electrically connected to the second positive electrode contact 31; both the first negative terminal 54 and the second negative terminal 55 are electrically connected to the second negative electrode contact 32, and the third negative terminal 56 is electrically connected to the first negative electrode contact 22. Furthermore, the potentials of the first positive terminal 51 and the second positive terminal 52 are both A+, the third positive terminal 53 is B+, the potentials of the first negative terminal 54 and the second negative terminal 55 are both B-, and the third positive terminal 53 is A-.
[0038] Even when there is a low-voltage usage requirement, when the power-off interface of the high-voltage power tool is inserted into the battery output interface 5, the positive electrode of the power-taking interface of the power tool only needs to be connected to the first positive terminal 51 and the third positive terminal 53 simultaneously, and the potential is the same as A+ and B+; the negative electrode of the power-taking interface only needs to be connected to the first negative terminal 54 and the third negative terminal 56 simultaneously, and the potential is the same as A- and B-. At this time, it is equivalent to connecting the first battery pack 2 and the second battery pack 3 in parallel to supply power to the power tool together, that is, the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 20V power supply is achieved.
[0039] When high voltage is required, just connect the positive pole of the power interface of the power tool to the third positive terminal 53, the negative pole of the power interface to the third negative terminal 56, and connect the second positive terminal 52 to the second negative terminal 55 by setting a metal sheet inside the power interface. At this time, the potential of the positive pole of the power interface is B+, the potential of the negative pole of the power interface is A-, and the second positive terminal 52A+ is connected to the second negative terminal 55B-, so that the first battery group 2 and the second battery group 3 form a series battery pack of B+-B-A+-A-, and the power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, then the effect of 40V power supply is achieved, and then the effect of high voltage supply is achieved.
[0040] In order to install and remove the battery pack, the first positive terminal 51 and the second positive terminal 52 are arranged side by side horizontally, and the first positive terminal 51 and the third positive terminal 53 are arranged side by side vertically; the first negative terminal 54 and the second negative terminal 55 are arranged side by side horizontally, and the first negative terminal 54 and the third negative terminal 56 are arranged side by side vertically. Even if the power supply interface of the power tool only needs to be set to a straight metal sheet for vertical insertion, the first positive terminal 51 and the third positive terminal 53 can be connected while ensuring that the second positive terminal 52 is not connected to the first positive terminal 51 or the second positive terminal 52. Similarly, the first negative terminal 54, the second negative terminal 55 and the third negative terminal 56 are the same as the positive terminals. That is, the smoothness of the installation is guaranteed, and at the same time, the stability and reliability of the 20V and 40V switching of the battery pack are guaranteed.
[0041] The first battery pack 2 and the second battery pack 3 each include a plurality of cells 6 and an aluminum sheet 7 for connecting the cells 6 in series or in parallel. In this embodiment, the first battery pack 2 and the second battery pack 3 each include five 4V lithium cells 6, which are connected end to end in series through the aluminum sheet 7 to form a 20V battery pack. When the effective capacity of one of the battery packs decays too much, it can be replaced, or one of the damaged cells 6 can be replaced to ensure the normal function of the overall lithium battery pack.
[0042] In order to monitor the working conditions of each battery cell 6 in the first battery group 2 and the second battery group 3 in the battery pack, data acquisition lines 8 are provided in the first battery group 2 and the second battery group 3. Each data acquisition line 8 is electrically connected to the circuit board 4. The circuit board 4 also includes a data output terminal 57 electrically connected to the data acquisition line 8. That is, a corresponding data acquisition metal sheet can be provided on the power tool and connected to the data output terminal 57, so that the power tool can monitor the voltage, temperature and other signals of the battery pack in real time, so that when the battery pack reaches a high temperature, the power tool automatically stops working to prevent damage to the battery pack.
[0043] Inside the housing 1, there is a battery cell 6 mounting bracket, which includes a pair of mounting plates 9. Inside the mounting plates 9, there are several positioning slots for the battery cell 6 to be inserted. That is, the two ends of the battery cell 6 are clamped and fixed in the positioning slots through the mounting plates 9, and a heat dissipation space is left between the battery cells 6 to prevent the battery cell 6 from overheating. The four corners of the circuit board 4 are respectively connected to the first positive contact 21, the first negative contact 22, the second positive contact 31, and the second negative contact 32 through metal pole pieces. So that the connection points of the positive and negative poles of the first battery pack 2 and the second battery pack 3 to the circuit board 4 are located at the four corners of the circuit board 4 and are far away from each other, thereby making the heat generated by the current evenly distributed on the circuit board 4, and further reducing the occurrence of overheating caused by heat concentration.
[0044] On both sides of the circuit board 4, there are also circuit sub-boards 41, and on the sub-boards, there are indicator lights 42 for displaying the battery level. So as to facilitate personnel to directly monitor whether the battery pack needs to be replaced.
[0045] The implementation principle of a battery pack with a dual-output mode in this application embodiment is: the first positive terminal 51 and the second positive terminal 52 are both electrically connected to the first positive contact 21, and the third positive terminal 53 is electrically connected to the second positive contact 31; the first negative terminal 54 and the second negative terminal 55 are both electrically connected to the second negative contact 32, and the third negative terminal 56 is electrically connected to the first negative contact 22. Thus, the potentials of the first positive terminal 51 and the second positive terminal 52 are both A+, the third positive terminal 53 is B+, the potentials of the first negative terminal 54 and the second negative terminal 55 are both B-, and the third positive terminal 53 is A-.
[0046] Even when there is a low-voltage usage requirement, when the power-off interface of the high-voltage power tool is inserted into the battery output interface 5, the positive pole of the power-taking interface of the power tool only needs to be connected to the first positive terminal 51 and the third positive terminal 53 at the same time, and the potential is the same as A+ and B+; the negative pole of the power-taking interface only needs to be connected to the first negative terminal 54 and the third negative terminal 56 at the same time, and the potential is the same as A- and B-. At this time, it is equivalent to connecting the first battery pack 2 and the second battery pack 3 in parallel to supply power to the power tool together, that is, the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 20V power supply is achieved.
[0047] When there is a high-voltage usage requirement, just connect the positive electrode of the power-taking interface of the power tool to the third positive terminal 53, connect the negative electrode of the power-taking interface to the third negative terminal 56, and make the second positive terminal 52 connected to the second negative terminal 55 through the metal sheet arranged inside the power-taking interface. At this time, the potential of the positive electrode of the power-taking interface is B+, the potential of the negative electrode of the power-taking interface is A-, and the second positive terminal 52 (A+) is connected to the second negative terminal 55 (B-), thereby enabling the first battery pack 2 and the second battery pack 3 to form a series battery pack of B+—B—A+—A-, and the power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 40V power supply is achieved, and then the effect of high-voltage supply is achieved.
[0048] That is, this battery pack can output dual voltages. Just set the corresponding power-taking interfaces for power tools with different voltage requirements. Thus, for power tools with different voltages, users only need to buy the same type of battery pack to meet the usage requirements, and there is no need to reserve battery packs with different voltages, which improves the versatility. Then, users only need to buy the battery once (or multiple spare ones) to drive all power tools compatible with this platform (such as electric drills, electric saws, angle grinders, hair dryers, lawn mowers, etc.), without having to buy expensive dedicated batteries and chargers separately for each new tool. Lower the entry threshold: Buying a "naked machine" (the version without battery and charger) is usually much cheaper than the version with a battery set. Users can gradually add tools as needed without having to pay the battery cost each time.
[0049] Improve the usage convenience and efficiency: Seamless tool switching: In the same work project (such as woodworking, decoration, gardening), only 1-2 batteries are needed to quickly switch between different tools without waiting for charging or looking for the battery of a specific tool. When one battery runs out of power, just replace it with a spare battery to continue working, and take the original battery to charge.
[0050] Reduce the carrying burden: When working outdoors, only a small number of universal batteries and 1-2 chargers are needed to support the operation of the whole set of tools, greatly reducing the weight and volume of the toolbox.
[0051] Simplify the charging management: Only need to manage the charging of one or a few battery models, and the chargers are also universal. There is no need to equip each tool with a dedicated charger, making the socket and desktop cleaner.
[0052] Enhance the user experience and brand stickiness: "Ecosystem" locking effect: Once users invest in buying a certain brand's battery platform and several core tools, it is very convenient and economical to add new tools compatible with this brand later, greatly improving users' loyalty and repurchase rate to the brand's ecosystem.
[0053] Future compatibility: Users don't have to worry about the compatibility between newly purchased tools and existing batteries. As long as they are on the same platform (such as the 18V system), new tools can be driven by old batteries (as long as the power is sufficient).
[0054] Upgrade flexibility: Users can choose to upgrade to batteries with higher capacity or more advanced technologies (such as fast charging), enhancing the performance and usage time of all existing tools.
[0055] Optimize battery utilization and value: Avoid idle waste: There will no longer be idle dedicated batteries gathering dust. Each battery can be fully utilized on all compatible tools owned by the user.
[0056] Prolong battery life: By rotating the use among different tools, overcharging and over-discharging of a single battery can be avoided, which helps to prolong the overall battery life (under reasonable usage conditions).
[0057] Second-hand market value: Universal battery packs have better liquidity and are easier to sell or transfer as accessories in the second-hand market.
[0058] Promote brand product line expansion and sales: Lower the threshold for users to try new tools: Users are more willing to try new product categories of the same brand (such as trying a circular saw from a drill), because they know they don't need to purchase additional batteries.
[0059] Simplify inventory management: Brands can centralize the production and sales of a few standardized battery models, simplifying the supply chain and retail inventory.
[0060] Bundle sales and promotions: It is easier to launch flexible sales combinations of "bare machine" + "battery set", or carry out promotions such as "buy a battery and get a tool for free" / "buy a tool and get a battery for free".
[0061] Simplify maintenance and recycling: Standardized maintenance: Users only need to be familiar with the maintenance and safety precautions of one or a few types of batteries.
[0062] Centralized recycling: When the battery reaches the end of its life, the recycling process is more centralized and convenient.
[0063] Technical iteration: Battery technologies (such as from nickel-cadmium to lithium-ion, and to possible future new technologies) and interface standards will develop, and old platforms may not be able to fully compatible with the latest tools or the performance of batteries.
[0064] Example 2 An embodiment of the present application discloses a power tool, which includes a battery pack as in Embodiment 1 and a power tool body. A card seat is arranged on the power tool body and is electrically connected to the battery pack to supply electric energy from the battery pack to the tool body. The card seat includes a base 101, and a total positive connection piece 102 and a total negative connection piece 103 are arranged on the base 101. When the battery pack is installed on the card seat, both the first positive terminal 51 and the third positive terminal 53 are in abutting connection and communication with the total positive connection piece 102, and both the first negative terminal 54 and the third negative terminal 56 are in abutting connection and communication with the total negative connection piece 103. That is, the total positive connection piece 102 of the power tool is simultaneously connected to the first positive terminal 51 and the third positive terminal 53, and the potential is the same as A+ and B+; the total negative connection piece 103 is simultaneously connected to the first negative terminal 54 and the third negative terminal 56, and the potential is the same as A- and B-. At this time, it is equivalent to connecting the first battery pack 2 and the second battery pack 3 in parallel to jointly supply power to the power tool, that is, the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, so the effect of 20V power supply is achieved. At the same time, a pair of data connection pieces for respectively inserting into the data output terminals 57 are also arranged on the base 101, so that while supplying energy, the power tool can obtain the working condition of the battery pack in real time to ensure normal use. At the same time, in this embodiment, a pair of metal connection pieces are also arranged to connect the data transmission port, so as to detect the state of the battery pack.
[0065] Embodiment 3 The differences between this embodiment and Embodiment 2 are as follows: The card holder includes a base 101, on which a main positive connection piece 102, a main negative connection piece 103, a secondary positive connection piece 104, a secondary negative connection piece 105, and a series metal piece 106 connecting the secondary positive connection piece 104 and the secondary negative electrode piece are provided; when the battery pack is installed on the card holder, all three positive terminal ends are in contact and connected with the main positive connection piece 102, the third negative terminal end 56 is in contact and connected with the main negative connection piece 103, the secondary positive connection piece 104 is in contact and connected with the second positive terminal end 52, and the secondary negative connection piece 105 is in contact and connected with the second negative terminal end 55. When the battery pack is clamped on the card holder of the power tool, the main positive connection piece 102 is connected with the third positive terminal end 53, the main negative connection piece 103 is connected with the third negative terminal end 56, and the secondary positive connection piece 104 is connected with the second positive terminal end 52, the secondary negative connection piece 105 is connected with the second negative terminal end 55, and the secondary positive connection piece 104 and the secondary negative electrode piece are connected through the series metal piece 106, so that the second positive terminal end 52 is connected with the second negative terminal end 55. At this time, the potential of the main positive connection piece 102 is B+, the potential of the main negative connection piece 103 is A-, and the second positive terminal end 52A+ is connected with the second negative terminal end 55B-, thereby enabling the first battery pack 2 and the second battery pack 3 to form a series battery pack of B+—B—A+—A-, and the supply voltage is the series voltage of the two battery packs. For example, if the voltage of the battery pack in this embodiment is 20V, the effect of 40V power supply is achieved, and then the effect of high-voltage supply is achieved to meet the 40V power consumption requirement of the power tool. In this embodiment, the secondary positive connection piece 104 and the secondary negative connection piece 105 are also in contact with the data transmission port at the same time for monitoring the state of the battery pack. Therefore, the card holders of this embodiment and Embodiment 2 both include four connecting metal pieces. For 20V, the outer two metal pieces are long and the inner two metal pieces are short; for 40V, the outer two metal pieces are short and the inner two metal pieces are long. As a result, the structural differences between the two are small, and the difference lies only in the adjustment of the length of the connecting metal pieces, which facilitates installation and production.
[0066] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.
Claims
1. A battery pack with a dual output mode, characterized in that: Comprising a housing (1); A first battery pack (2) and a second battery pack (3) disposed within the housing (1), the first battery pack (2) being provided with a first positive electrode contact (21) and a first negative electrode contact (22); the second battery pack (3) being provided with a second positive electrode contact (31) and a second negative electrode contact (32); A circuit board (4), the circuit board (4) being provided with a battery output interface (5) for the battery pack; The battery output interface (5) includes a first positive terminal (51), a second positive terminal (52), and a third positive terminal (53), as well as a first negative terminal (54), a second negative terminal (55), and a third negative terminal (56); The first positive terminal (51) and the second positive terminal (52) are both electrically connected to the first positive electrode contact (21), and the third positive terminal (53) is electrically connected to the second positive electrode contact (31); The first negative terminal (54) and the second negative terminal (55) are both electrically connected to the second negative electrode contact (32), and the third negative terminal (56) is electrically connected to the first negative electrode contact (22).
2. The dual-output mode battery pack according to claim 1, characterized in that: The first positive terminal (51) and the second positive terminal (52) are arranged side by side horizontally, and the first positive terminal (51) and the third positive terminal (53) are arranged side by side vertically; The first negative terminal (54) and the second negative terminal (55) are arranged side by side horizontally, and the first negative terminal (54) and the third negative terminal (56) are arranged side by side vertically.
3. The dual-output mode battery pack according to claim 1, wherein: A battery cell (6) mounting bracket is disposed within the housing (1), the battery cell (6) mounting bracket includes a pair of mounting plates (9), and a plurality of positioning grooves for embedding the battery cells (6) are provided within the mounting plates (9).
4. A dual-output mode battery pack according to claim 1, characterized in that: The first battery pack (2) and the second battery pack (3) each include a plurality of battery cells (6) and aluminum sheets (7) for connecting the battery cells (6) in series or in parallel.
5. A dual-output mode battery pack according to claim 1, characterized in that: Data acquisition lines (8) are provided in both the first battery pack (2) and the second battery pack (3), each of the data acquisition lines (8) is electrically connected to the circuit board (4), and the circuit board (4) further includes a data output terminal (57) electrically connected to the data acquisition line (8).
6. The dual-output mode battery pack according to claim 1, wherein: Four corners of the circuit board (4) are respectively connected to the first positive electrode contact (21), the first negative electrode contact (22), the second positive electrode contact (31), and the second negative electrode contact (32) through metal pole pieces.
7. A dual-output mode battery pack according to claim 1, characterized in that: Circuit sub-boards (41) are further provided on both sides of the circuit board (4), and display lamps (42) for displaying the battery level are provided on the sub-boards.
8. An electric tool, characterized in that: Comprising a dual-output mode battery pack according to any one of claims 1-8, and a power tool body, wherein a card seat for electrically connecting with the battery pack to supply electric energy from the battery pack to the tool body is provided on the power tool body.
9. An electric tool according to claim 8, characterized in that: The card holder includes a base (101), and a total positive connection piece (102) and a total negative connection piece (103) are arranged on the base (101); when the battery pack is installed on the card holder, the first positive terminal (51) and the third positive terminal (53) are both in abutting connection and communication with the total positive connection piece (102), and the first negative terminal (54) and the third negative terminal (56) are both in abutting connection and communication with the total negative connection piece (103).
10. An electric tool according to claim 8, characterized in that: The card holder includes a base (101), and a total positive connection piece (102), a total negative connection piece (103), a secondary positive connection piece (104), a secondary negative connection piece (105) and a series metal piece (106) connecting the secondary positive connection piece (104) and the secondary negative piece are arranged on the base (101); when the battery pack is installed on the card holder, the three positive terminals are all in abutting connection and communication with the total positive connection piece (102), the third negative terminal (56) is in abutting connection and communication with the total negative connection piece (103), the secondary positive connection piece (104) is in abutting connection and communication with the second positive terminal (52), and the secondary negative connection piece (105) is in abutting connection and communication with the second negative terminal (55).