A dual output mode battery pack and power tool applying the same

Abstract

The application relates to a double-output-mode battery pack and an electric tool applying the same, which comprises a shell, a first battery group and a second battery group arranged in the shell, first positive contact points and first negative contact points arranged on the first battery group, second positive contact points and second negative contact points arranged on the second battery group, a circuit board provided with battery output interfaces of the battery groups, the battery output interfaces comprising first positive terminals, second positive terminals and third positive terminals, and first negative terminals, second negative terminals and third negative terminals, the first positive terminals and the second positive terminals being electrically connected with the first positive contact points, the third positive terminal being electrically connected with the second positive contact points, the first negative terminals and the second negative terminals being electrically connected with the second negative contact points, and the third negative terminal being electrically connected with the first negative contact points. The application has the effects of being capable of outputting two voltage modes, not needing to reserve battery packs with different voltages, and improving the convenience of personnel use.

Description

Technical Field

[0001] This application relates to the technical field of battery packs, and in particular to a dual-output mode battery pack and power tools using the same. Background Technology

[0002] With the widespread use of power tools, lithium battery packs have become the mainstream power source due to their high energy density, lightweight, and environmentally friendly characteristics. Currently, most power tool battery packs on the market adopt a fixed voltage output design. This means that the output voltage (e.g., 12V, 18V, 20V, etc.) is determined during production by connecting the battery cells in series and parallel, and this voltage remains constant throughout its entire lifespan. As previously applied for by our company, with publication number CN216928696U, a linkage-type battery pack includes a housing, a light strip, and a switch for turning the light strip on and off. The housing has a button for pressing the switch, a snap-fit ​​plate for connecting to a power tool, and a linkage component for driving the button to move towards the switch.

[0003] However, different power tools have significantly different input voltage requirements due to differences in power demands, motor design, and working scenarios. For example, small handheld drills mostly use 12V, while high-power tools such as chainsaws and angle grinders often require 18V or 20V. This means that users must equip themselves with separate battery packs for each voltage specification when using multiple power tools. For instance, a user who uses a drill, chainsaw, and lawnmower simultaneously would need to carry 12V, 18V, and 20V battery packs, which not only increases purchase costs but also significantly increases the burden of carrying them, making it extremely inconvenient, especially for mobile scenarios such as outdoor work or working at heights. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a dual-output mode battery pack, which is capable of outputting two voltage modes, so that the same type of battery pack can meet the usage requirements, thereby eliminating the need for spare battery packs with different voltages and improving the ease of use for personnel.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A dual-output mode battery pack, including a housing; A first battery pack and a second battery pack are disposed within a housing. The first battery pack is provided with a first positive contact and a first negative contact; the second battery pack is provided with a second positive contact and a second negative contact. A circuit board is provided with a battery output interface for the battery packs. The battery output interface includes 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 and second positive terminals are electrically connected to the first positive contact, and the third positive terminal is electrically connected to the second positive contact. The first and second negative terminals are both electrically connected to the second negative contact, and the third negative terminal is electrically connected to the first negative contact.

[0006] To achieve the above technical solution, even when low-voltage usage is required, simply inserting the power output interface of the high-voltage power tool into the battery output interface allows the positive terminal of the power tool's input interface to be connected to both the first and third positive terminals simultaneously, with the potential being the same as A+ and B+; similarly, the negative terminal of the input interface only needs to be connected to both the first and third negative terminals simultaneously, with the potential being the same as A- and B-. This is equivalent to connecting the first and second battery packs in parallel to supply power to the power tool, meaning the supply voltage is the voltage of a single battery pack. For example, in this embodiment, if the battery pack voltage is 20V, then a 20V power supply is achieved. When high-voltage usage is required, simply connecting the positive terminal of the power tool's input interface to the third positive terminal... The negative terminal of the power input interface is connected to the third negative terminal, and the second positive terminal is connected to the second negative terminal through a metal plate inside the power input interface. At this time, the potential of the positive terminal of the power input interface is B+, and the potential of the negative terminal of the power input interface is A-. The second positive terminal A+ is connected to the second negative terminal B-, thereby forming a series battery pack of B+-B-A+-A- between the first battery pack and the second battery pack. The supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, so a 40V supply effect is achieved, thereby achieving a high voltage supply effect. This allows the same battery pack to meet the usage requirements of different voltages, thus eliminating the need to spare battery packs of different voltages and improving the convenience of use for personnel.

[0007] As a preferred embodiment of this 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] By implementing the above technical solution, even if the power input interface of the power tool is simply set to a vertically inserted, straight-line metal plate, the first and third positive terminals can be connected while ensuring that the second positive terminal is not connected to either the first or second positive terminal. Similarly, the first, second, and third negative terminals are the same as the positive terminals. This ensures smooth installation while also guaranteeing the stability and reliability of the battery pack's 20V and 40V switching.

[0009] As a preferred embodiment of this 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] By implementing the above technical solution, when the effective capacity of one of the battery packs degrades too much, it can be replaced, or a damaged cell can be replaced, in order to ensure the normal function of the overall lithium battery pack.

[0011] As a preferred embodiment of this application, a cell mounting bracket is provided inside the housing. The cell mounting bracket includes a pair of mounting plates, and the mounting plates are provided with a plurality of positioning slots for embedding the cells.

[0012] To achieve the above technical solution, the battery cell mounting bracket includes a pair of mounting plates, each with several positioning slots for embedding the battery cells. The mounting plates clamp and secure the battery cells by engaging both ends in the positioning slots, and the gaps between the battery cells are designed to allow for heat dissipation, thereby preventing overheating.

[0013] As a preferred embodiment of this application, both the first battery pack and the second battery pack are provided with data acquisition lines, each of which is electrically connected to a circuit board. The circuit board also includes a data output terminal electrically connected to the data acquisition line.

[0014] To achieve the above technical solution, a corresponding data acquisition metal plate can be installed on the power tool and connected to the data output terminal, so that the power tool can monitor the voltage and temperature of the battery pack in real time. When the battery pack is overheated, the power tool will automatically stop working to prevent damage to the battery pack.

[0015] As a preferred embodiment of this 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 via metal electrodes.

[0016] The above technical solution is implemented so that the connection points of the positive and negative electrodes of the first and second battery packs with the circuit board are located at the four corners of the circuit board and are far apart 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 embodiment of this application, the circuit board is further provided with circuit sub-boards on both sides, and the circuit sub-boards are provided with indicator lights for displaying power.

[0018] The above technical solution allows personnel to visually monitor whether the battery pack needs to be replaced.

[0019] This application also provides an electric tool, including a battery pack and an electric tool body, wherein the electric tool body is provided with a socket electrically connected to the battery pack so that the battery pack supplies power to the tool body.

[0020] As a preferred embodiment of this application, the card holder includes a base, on which a main positive connection piece and a main negative connection piece are disposed; when the battery pack is installed on the card holder, the first positive terminal and the third positive terminal are both in contact with the main positive connection piece, and the first negative terminal and the third negative terminal are both in contact with the main negative connection piece.

[0021] To achieve the above technical solution, the main positive connection piece of the power tool is simultaneously connected to both the first and third positive terminals, with the same potential as A+ and B+; the main negative connection piece is simultaneously connected to both the first and third negative terminals, with the same potential as A- and B-. This is equivalent to connecting the first and second battery packs in parallel to supply power to the power tool, meaning the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, thus achieving a 20V power supply. Simultaneously, the base is also equipped with a pair of data connection pieces for insertion into the data output terminals, thereby enabling the power tool to obtain real-time battery pack status while supplying power, ensuring normal operation.

[0022] As a preferred embodiment of this application, the card holder includes a base, on which are disposed a main positive connecting piece, a main negative connecting piece, a secondary positive connecting piece, and a secondary negative connecting piece, as well as a series metal component connecting the secondary positive connecting piece and the secondary negative electrode piece; when the battery pack is installed on the card holder, all three positive terminals are in contact with the main positive connecting piece, the third negative terminal is in contact with the main negative connecting piece, the secondary positive connecting piece is in contact with the second positive terminal, and the secondary negative connecting piece is in contact with the second negative terminal.

[0023] To achieve the above technical solution, when the battery pack is attached to the socket of the power tool, the main positive connecting piece is connected to the third positive terminal, the main negative connecting piece is connected to the third negative terminal, the secondary positive connecting piece is connected to the second positive terminal, the secondary negative connecting piece is connected to the second negative terminal, and the secondary positive connecting piece and the secondary negative terminal are connected by a series metal component, so that the second positive terminal is connected to the second negative terminal. At this time, the potential of the main positive connecting piece is B+, the potential of the main negative connecting piece is A-, and the second positive terminal A+ is connected to the second negative terminal B-, thereby forming a series battery pack of B+-B-A+-A- between the first battery pack and the second battery pack. The power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, thus achieving the effect of 40V power supply, thereby achieving the effect of high voltage supply to meet the 40V power demand of the power tool.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. When low-voltage usage is required, simply inserting the power output port of the high-voltage power tool into the battery output port allows the positive terminal of the power tool's input port to be connected to both the first and third positive terminals simultaneously, with the potential being the same as A+ and B+; the negative terminal of the input port only needs to be connected to both the first and third negative terminals simultaneously, with the potential being the same as A- and B-. This effectively connects the first and second battery packs in parallel to supply power to the power tool, meaning the supply voltage is the voltage of a single battery pack. For example, in this embodiment, if the battery pack voltage is 20V, then a 20V power supply is achieved. When high-voltage usage is required, simply connecting the positive terminal of the power tool's input port to the third positive terminal and the negative terminal of the input port to the third positive terminal... The negative terminal is connected, and the second positive terminal is connected to the second negative terminal through a metal plate inside the power input interface. At this time, the potential of the positive terminal of the power input interface is B+, and the potential of the negative terminal of the power input interface is A-. The second positive terminal A+ is connected to the second negative terminal B-, thereby forming a series battery pack of B+-B-A+-A- between the first battery pack and the second battery pack. The supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, so a 40V power supply is achieved, thus achieving a high voltage supply effect. This allows for the output of two voltage modes, so that the same type of battery pack can meet the usage requirements, thereby eliminating the need to spare battery packs with different voltages and improving the convenience of use for personnel. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0027] Figure 2 This is a schematic diagram of the internal structure of the shell in Embodiment 1 of this application.

[0028] Figure 3 This is a schematic diagram of the circuit board portion in Embodiment 1 of this application.

[0029] Figure 4 This is a schematic diagram of the battery pack section in Embodiment 1 of this application.

[0030] Figure 5 This is a schematic diagram of the battery output interface in Embodiment 1 of this application.

[0031] Figure 6 This is a schematic diagram of the connection structure of Embodiment 2 of this application.

[0032] Figure 7 This is a schematic diagram of the connection structure of Embodiment 3 of this application.

[0033] Reference numerals: 1. Housing; 2. First battery pack; 21. First positive contact; 22. First negative contact; 3. Second battery pack; 31. Second positive contact; 32. Second negative contact; 4. Circuit board; 41. Circuit sub-board; 42. Indicator light; 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 component. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1 to 7 This application will be described in further detail.

[0035] Example 1

[0036] This application discloses a dual-output mode battery pack. (Refer to...) Figure 1 The dual-output mode battery pack includes a housing 1; A first battery pack 2 and a second battery pack 3 are disposed within the housing 1. The first battery pack 2 has a first positive contact 21 and a first negative contact 22; the second battery pack 3 has a second positive contact 31 and a second negative contact 32. That is, the first battery pack 2 and the second battery pack 3 supply electrical energy to the outside through their respective positive and negative contacts. For ease of understanding, the potential of the first positive contact 21 is A+, the potential of the first negative contact 22 is A-, the potential of the second positive contact 31 is B+, and the potential of the first negative contact 22 is B-.

[0037] It also includes a circuit board 4, which has a battery output interface 5 that is connected to the first battery pack 2 and the second battery pack 3; that is, it supplies power to the power tools that need power through the battery output interface 5.

[0038] 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 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. This results in the first positive terminal 51 and the second positive terminal 52 having a potential of A+, the third positive terminal 53 having a potential of B+, the first negative terminal 54 and the second negative terminal 55 having a potential of B-, and the third positive terminal 53 having a potential of A-.

[0039] Even when low voltage is required, when the power output interface of the high-voltage power tool is inserted into the battery output interface 5, the positive terminal of the power input interface of the power tool only needs to be connected to the first positive terminal 51 and the third positive terminal 53 simultaneously, with the potential being the same as A+ and B+; the negative terminal of the power input interface only needs to be connected to the first negative terminal 54 and the third negative terminal 56 simultaneously, with the potential being 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, 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.

[0040] When high voltage is required, simply connect the positive terminal of the power tool's power input interface to the third positive terminal 53, and the negative terminal of the power input interface to the third negative terminal 56. A metal plate inside the power input interface connects the second positive terminal 52 to the second negative terminal 55. At this time, the potential of the positive terminal of the power input interface is B+, and the potential of the negative terminal is A-. The second positive terminal 52 (A+) and the second negative terminal 55 (B-) are connected, thus forming a series battery pack of B+-B-A+-A- between the first battery pack 2 and the second battery pack 3. The supply voltage is the series voltage of the two battery packs. For example, in this embodiment, if the battery pack voltage is 20V, a 40V power supply is achieved, thereby realizing a high voltage supply.

[0041] For the installation and removal of the battery pack, the first positive terminal 51 and the second positive terminal 52 are arranged horizontally side by side, and the first positive terminal 51 and the third positive terminal 53 are arranged vertically side by side; the first negative terminal 54 and the second negative terminal 55 are arranged horizontally side by side, and the first negative terminal 54 and the third negative terminal 56 are arranged vertically side by side. Even if the power tool's power input interface only needs to be designed with a vertically inserted, straight-line metal plate, 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 either the first positive terminal 51 or the second positive terminal 53. Similarly, the first negative terminal 54, the second negative terminal 55, and the third negative terminal 56 are the same as the positive terminals. This ensures smooth installation while also guaranteeing the stability and reliability of the battery pack's 20V and 40V switching.

[0042] Both the first battery pack 2 and the second battery pack 3 include several battery cells 6 and aluminum sheets 7 for connecting the battery cells 6 in series or in parallel. In this embodiment, both the first battery pack 2 and the second battery pack 3 consist of 5 4V lithium battery cells 6, which are connected in series end to end through the aluminum sheets 7 to form a 20V battery pack. When the effective capacity of one of the battery packs degrades too much, it can be replaced, or one of the damaged battery cells 6 can be replaced to ensure the normal functioning of the overall lithium battery pack.

[0043] In order to monitor the working condition of each cell 6 in the first battery pack 2 and the second battery pack 3, data acquisition lines 8 are provided in both the first battery pack 2 and the second battery pack 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 that is electrically connected to the data acquisition line 8. That is, the power tool can be equipped with a corresponding data acquisition metal piece connected to the data output terminal 57, so that the power tool can monitor the voltage and temperature of the battery pack in real time, so that when the battery pack is hot, the power tool will automatically stop working to prevent damage to the battery pack.

[0044] The housing 1 contains a battery cell 6 mounting bracket, which includes a pair of mounting plates 9. Each mounting plate 9 has several positioning slots for embedding the battery cells 6. The mounting plates 9 clamp and secure the battery cells 6 by engaging both ends in the positioning slots, and the gaps between the battery cells 6 allow for heat dissipation, thus preventing overheating. The four corners of the circuit board 4 are connected to the first positive contact 21, the first negative contact 22, the second positive contact 31, and the second negative contact 32 via metal electrodes. This ensures that the connection points of the positive and negative electrodes 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, distancing them from each other. This allows the heat generated by the current to be evenly distributed on the circuit board 4, reducing the risk of overheating due to heat concentration.

[0045] Circuit board 4 also has sub-circuit boards 41 on both sides, and the sub-circuit boards are equipped with indicator lights 42 for displaying battery level. This allows personnel to visually monitor whether the battery pack needs to be replaced.

[0046] The implementation principle of a dual-output mode battery pack according to an embodiment of this application is as follows: 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. This results in the first positive terminal 51 and the second positive terminal 52 having a potential of A+, the third positive terminal 53 having a potential of B+, the first negative terminal 54 and the second negative terminal 55 having a potential of B-, and the third positive terminal 53 having a potential of A-.

[0047] Even when low voltage is required, when the power output interface of the high-voltage power tool is inserted into the battery output interface 5, the positive terminal of the power input interface of the power tool only needs to be connected to the first positive terminal 51 and the third positive terminal 53 simultaneously, with the potential being the same as A+ and B+; the negative terminal of the power input interface only needs to be connected to the first negative terminal 54 and the third negative terminal 56 simultaneously, with the potential being 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, 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.

[0048] When high voltage is required, simply connect the positive terminal of the power tool's power input interface to the third positive terminal 53, and the negative terminal of the power input interface to the third negative terminal 56. A metal plate inside the power input interface connects the second positive terminal 52 to the second negative terminal 55. At this time, the potential of the positive terminal of the power input interface is B+, and the potential of the negative terminal is A-. The second positive terminal 52 (A+) and the second negative terminal 55 (B-) are connected, thus forming a series battery pack of B+-B-A+-A- between the first battery pack 2 and the second battery pack 3. The power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, if the battery pack voltage is 20V, a 40V power supply is achieved, thereby realizing a high voltage supply.

[0049] This battery pack can function as a dual-voltage output. Users only need to set the corresponding power interface for power tools with different voltage requirements. This allows users to purchase the same type of battery pack to meet their needs for power tools with different voltage requirements, eliminating the need for spare battery packs of different voltages. This improves versatility. Users only need to purchase one battery (or multiple spares) to power all power tools compatible with this platform (such as drills, chainsaws, angle grinders, hair dryers, lawnmowers, etc.), without needing to buy expensive dedicated batteries and chargers for each new tool. It lowers the barrier to entry: purchasing a "bare" version (without battery and charger) is usually much cheaper than a battery pack. Users can gradually add tools as needed without having to pay for batteries each time.

[0050] Improve ease of use and efficiency: Seamless tool switching: Within the same work project (such as carpentry, renovation, gardening), you can quickly switch between different tools using only 1-2 batteries, without waiting to charge or searching for batteries for specific tools. If one battery runs out, simply replace it with a spare battery to continue working; the original battery can be used for charging.

[0051] Reduced carrying burden: When working outside, you only need to carry a small number of universal batteries and 1-2 chargers to support the operation of the entire tool set, which greatly reduces the weight and size of the toolbox.

[0052] Simplified charging management: Only one or a few battery models need to be managed. The charger is also universal, eliminating the need to equip each tool with a dedicated charger, and the sockets and desktops are also tidier.

[0053] Enhance user experience and brand loyalty: The "ecosystem" lock-in effect: Once users invest in a brand's battery platform and a few core tools, it becomes very convenient and economical to add new compatible tools from that brand, greatly increasing user loyalty to the brand's ecosystem and repurchase rate.

[0054] Future compatibility: Users do not need to worry about compatibility issues between the new tool and the existing battery. As long as it is on the same platform (such as an 18V system), the new tool can be powered by the old battery (as long as the power is sufficient).

[0055] Upgrade flexibility: Users can choose to upgrade to batteries with higher capacity or more advanced technologies (such as fast charging) to improve the performance and usage time of all existing tools.

[0056] Optimize battery utilization and value: Avoid idle waste: No more idle dedicated batteries gathering dust; every battery can be fully utilized on all compatible tools the user owns.

[0057] Extending battery life: By rotating between different tools, you can avoid overcharging and discharging a single battery, which helps to extend the overall battery life (under reasonable use).

[0058] Second-hand market value: Universal battery packs have better liquidity and are easier to sell on the second-hand market or transfer as accessories.

[0059] Promote brand product line expansion and sales: Lowering the barrier for users to try new tools: Users are more willing to try new categories of tools from the same brand (such as trying a circular saw instead of a drill) because they know they don't need to buy extra batteries.

[0060] Simplified inventory management: Brands can centralize the production and sales of a few standardized battery models, simplifying the supply chain and retail inventory.

[0061] Bundled sales and promotions: It is easier to launch flexible sales combinations such as "battery kit" + "battery bundle", or to carry out promotional activities such as "buy battery and get tools free" / "buy tools and get batteries free".

[0062] Simplify maintenance and recycling: Standardized maintenance: Users only need to be familiar with the maintenance and safety precautions for one or a few types of batteries.

[0063] Centralized recycling: When batteries reach the end of their lifespan, recycling is more centralized and convenient.

[0064] Technological iteration: Battery technologies (such as from nickel-cadmium to lithium-ion, and to possible new technologies in the future) and interface standards will evolve, and older platforms may not be compatible with the full performance of the latest tools or batteries.

[0065] Example 2

[0066] This application discloses an electric tool, including a battery pack as shown in Embodiment 1, and an electric tool body, referred to... Figure 6The power tool body is provided with a socket electrically connected to the battery pack to supply power to the tool body. The socket includes a base 101, on which a main positive connection piece 102 and a main negative connection piece 103 are provided. When the battery pack is installed on the socket, the first positive terminal 51 and the third positive terminal 53 are both in contact with the main positive connection piece 102, and the first negative terminal 54 and the third negative terminal 56 are both in contact with the main negative connection piece 103. This means that the main positive connection piece 102 of the power tool is simultaneously connected to the first positive terminal 51 and the third positive terminal 53, with the same potential as A+ and B+; the main negative connection piece 103 is simultaneously connected to the first negative terminal 54 and the third negative terminal 56, with the same potential 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, that is, the supply voltage is the voltage of a single battery pack. For example, in this embodiment, the battery pack voltage is 20V, thus achieving the effect of 20V power supply. Meanwhile, the base 101 is also equipped with a pair of data connection pieces for insertion into the data output terminals 57, thereby enabling the power tool to obtain the battery pack status in real time while providing power, in order to ensure normal operation. In this embodiment, a pair of metal connection pieces are also provided for connecting the data transmission port, thereby detecting the battery pack status.

[0067] Example 3

[0068] The difference between this embodiment and Embodiment 2 is that: (Refer to...) Figure 7The card holder includes a base 101, on which are provided a main positive connecting piece 102, a main negative connecting piece 103, a secondary positive connecting piece 104, and a secondary negative connecting piece 105, as well as a series metal piece 106 connecting the secondary positive connecting piece 104 and the secondary negative electrode piece. When the battery pack is installed on the card holder, all three positive terminals are in contact with the main positive connecting piece 102, the third negative terminal 56 is in contact with the main negative connecting piece 103, the secondary positive connecting piece 104 is in contact with the second positive terminal 52, and the secondary negative connecting piece 105 is in contact with the second negative terminal 55. When the battery pack is attached to the socket of the power tool, the main positive connector 102 is connected to the third positive terminal 53, the main negative connector 103 is connected to the third negative terminal 56, the secondary positive connector 104 is connected to the second positive terminal 52, the secondary negative connector 105 is connected to the second negative terminal 55, and the secondary positive connector 104 and the secondary negative connector are connected by a series metal piece 106, so that the second positive terminal 52 and the second negative terminal 55 are connected. At this time, the potential of the main positive connector 102 is B+, the potential of the main negative connector 103 is A-, and the second positive terminal 52A+ and the second negative terminal 55B- are connected, thereby forming a series battery pack of B+-B-A+-A- between the first battery pack 2 and the second battery pack 3. The power supply voltage is the series voltage of the two battery packs. For example, in this embodiment, the battery pack voltage is 20V, thus achieving the effect of 40V power supply, thereby achieving the effect of high voltage supply to meet the 40V power demand of the power tool. In this embodiment, the secondary positive connecting piece 104 and the secondary negative connecting piece 105 also simultaneously contact the data transmission port for monitoring the battery pack status. Therefore, both this embodiment and Embodiment 2's card holder contain four connecting metal pieces. For 20V, the two outer metal pieces are longer, and the two inner metal pieces are shorter; for 40V, the two outer metal pieces are shorter, and the two inner metal pieces are longer. This results in minimal structural differences between the two, with the only difference being the adjustment of the length of the connecting metal pieces, thus facilitating installation and production.

[0069] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-output mode battery pack, characterized in that: Includes the housing (1); A first battery pack (2) and a second battery pack (3) are disposed 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). Circuit board (4), wherein a battery output interface (5) for the battery pack is provided on the circuit board (4); 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 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).

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 in the horizontal direction, and the first positive terminal (51) and the third positive terminal (53) are arranged side by side in the vertical direction; The first negative terminal (54) and the second negative terminal (55) are arranged side by side in the horizontal direction, and the first negative terminal (54) and the third negative terminal (56) are arranged side by side in the vertical direction.

3. A dual-output mode battery pack according to claim 1, characterized in that: The housing (1) contains a battery cell (6) mounting bracket, which includes a pair of mounting plates (9) and a plurality of positioning slots for embedding the battery cells (6) in 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 number 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: The first battery pack (2) and the second battery pack (3) are each provided with a data acquisition line (8), and 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).

6. A dual-output mode battery pack according to claim 1, characterized in that: 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) via metal electrodes.

7. A dual-output mode battery pack according to claim 1, characterized in that: Circuit sub-boards (41) are also provided on both sides of the circuit board (4), and indicator lights (42) for displaying power are provided on the circuit sub-boards (41).

8. A power tool, characterized in that: The invention includes a dual-output mode battery pack as described in any one of claims 1-7, and a power tool body, wherein the power tool body is provided with a socket electrically connected to the battery pack to supply power from the battery pack to the tool body.

9. A power tool according to claim 8, characterized in that: The card holder includes a base (101), on which a main positive connecting piece (102) and a main negative connecting piece (103) are provided; when the battery pack is installed on the card holder, the first positive terminal (51) and the third positive terminal (53) are both in contact with the main positive connecting piece (102), and the first negative terminal (54) and the third negative terminal (56) are both in contact with the main negative connecting piece (103).

10. A power tool according to claim 8, characterized in that: The card holder includes a base (101), on which are provided a main positive connecting piece (102), a main negative connecting piece (103), a secondary positive connecting piece (104), and a secondary negative connecting piece (105), as well as a series metal piece (106) connecting the secondary positive connecting piece (104) and the secondary negative electrode piece; when the battery pack is installed on the card holder, all three positive terminals are in contact with the main positive connecting piece (102), the third negative terminal (56) is in contact with the main negative connecting piece (103), the secondary positive connecting piece (104) is in contact with the second positive terminal (52), and the secondary negative connecting piece (105) is in contact with the second negative terminal (55).

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