Battery device and power tool assembly

Abstract

This application discloses a battery device and a power tool assembly, belonging to the field of battery technology. The battery device includes a battery housing, at least two battery cells, and at least two sets of power terminals. The battery housing is provided with power slots for inserting a plug into the power tool. Each battery cell is disposed within the battery housing. A portion of each set of power terminals is disposed within the power slots and can be electrically connected to the plug. Each set of power terminals is spaced apart along the insertion direction of the plug. Each set of power terminals is electrically connected to a battery string, and each battery string includes battery cells. The number of battery cells in each battery string is different, so that each set of power terminals outputs a different voltage level. This design allows the same battery device to output at least two different voltage levels. Simultaneously, it reduces the number of slots on the battery housing and improves space utilization, making the battery device more compact and suitable for compact power tools.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery device and a power tool assembly. Background Technology

[0002] Portable power tools (such as electric drills, angle grinders, lawnmowers, and chainsaws) are widely used in home renovation, garden maintenance, and equipment repair. Battery-powered devices provide them with an independent and portable power source, freeing them from the constraints of mains cables and significantly improving operational flexibility and ease of use. To improve energy efficiency and reduce operating costs, current power tools generally use rechargeable battery devices as their power unit.

[0003] Power tools of different types and power specifications typically have a fixed operating voltage. Power tools with different operating voltages require matching battery packs of the corresponding voltage level to operate properly. However, most power tool battery packs are designed with a fixed voltage output, capable of outputting only a single voltage and incompatible with tools operating at different voltages. Summary of the Invention

[0004] The purpose of this application is to provide a battery device and a power tool assembly that can solve the problem in the related art that battery devices cannot be compatible with tools with different operating voltages.

[0005] In a first aspect, embodiments of this application provide a battery device for use in power tools, the battery device comprising: The battery housing is provided with a power slot for inserting a plug for a power tool; At least two battery cells are disposed within the battery casing; At least two sets of power terminals, each set of power terminals is partially disposed in the power slot and can be electrically connected to the plug respectively, and each set of power terminals is spaced apart along the insertion direction of the plug; Each group of power terminals is electrically connected to a battery string, and each group of battery strings includes battery cells. The number of battery cells in each group of battery strings is different, so that each group of power terminals outputs a voltage of a different level.

[0006] Secondly, embodiments of this application also provide a power tool assembly, which includes a power tool and the aforementioned battery device. The power tool is provided with a plug, which can be inserted into the power slot of the battery device and can be selectively electrically connected to a set of power terminals in the battery device.

[0007] In this embodiment of the application, by providing at least two sets of power terminals in the battery device, each set of power terminals is electrically connected to a battery string composed of different numbers of battery cells, so that the same battery device can output at least two different voltage levels to adapt to power tools with different operating voltages, significantly improving the versatility and utilization of the battery device, and reducing the cost for users to equip power tools with multiple battery devices for different voltage specifications.

[0008] At least a portion of each set of power terminals is disposed within a power slot and spaced apart along the insertion direction of the plug. This reduces the need for slots on the battery casing and improves space utilization, resulting in a more compact battery device structure suitable for compact power tools. Furthermore, the separate arrangement of the power terminals along the insertion direction allows for a greater relative distance between adjacent sets of terminals, increasing the safety distance between them and reducing the risk of short circuits caused by terminals being too close together. This significantly improves the electrical safety performance of the battery device. Attached Figure Description

[0009] Figure 1 This is one of the perspective views of the battery device disclosed in the embodiments of this application; Figure 2 This is a second perspective view of the battery device disclosed in the embodiments of this application; Figure 3 This is a front view of the battery device disclosed in the embodiments of this application; Figure 4 This is an exploded view of the battery device disclosed in the embodiments of this application; Figure 5 This is one of the perspective views of the battery cell housing disclosed in the embodiments of this application; Figure 6 This is a second perspective view of the battery cell housing disclosed in the embodiments of this application; Figure 7 This is the third perspective view of the battery device disclosed in the embodiments of this application (hiding the protective housing and sealing components). Figure 8 This is the fourth perspective view of the battery device disclosed in the embodiments of this application (hiding the protective housing and sealing components). Figure 9 This is a schematic diagram of the battery device disclosed in the embodiments of this application from a cross-sectional view. Figure 10 This is a cross-sectional view of the battery device disclosed in the embodiments of this application; Figure 11 This is the fifth perspective view of the battery device disclosed in the embodiments of this application (concealing the power terminals, signal terminals, circuit board, and second housing). Figure 12This is a perspective view of the second housing portion disclosed in the embodiments of this application; Figure 13 This is a perspective view of the first housing portion disclosed in the embodiments of this application; Figure 14 This is a top view of the first housing portion disclosed in the embodiments of this application; Figure 15 This is a partial enlarged view of the battery device disclosed in the embodiments of this application; Figure 16 This is a partial exploded view of the battery device disclosed in the embodiments of this application; Figure 17 This is the sixth perspective view of the battery device disclosed in the embodiments of this application (hiding the protective casing and sealing plate). Figure 18 This is one of the connection diagrams of the circuit board, battery cell, and battery cell housing disclosed in the embodiments of this application; Figure 19 This is the seventh perspective view of the battery device disclosed in the embodiments of this application (hiding the protective casing and sealing plate). Figure 20 This is a connection diagram of the circuit board, conductive connection portion, and conductive lead-out portion disclosed in the embodiments of this application; Figure 21 This is the second connection diagram of the circuit board, battery cell, and battery cell housing disclosed in the embodiments of this application; Figure 22 This is a diagram showing the positional relationship between the battery cell housing and the first housing portion as disclosed in the embodiments of this application.

[0010] Explanation of reference numerals in the attached figures: 10 - Battery casing; 20 - Battery cell; 21 - Electrode; 2101 - Positive electrode; 2102 - Negative electrode; 100 - Battery cell housing; 101 - Restraining and limiting part; 102 - Supporting and limiting part; 103 - Engaging groove; 110 - Half shell; 120 - Limiting and engaging part; 130 - Groove; 131 - First groove; 132 - Second groove; 140 - Connecting protrusion; 150 - Annular limiting groove; 200 - Protective housing; 201 - Second end wall; 2010 - Wall section; 2011 - First wall section; 2012 - Second wall section; 2013 - Guide surface; 210 - First housing portion; 211 - Limiting hole; 212 - Fluid through hole; 213 - First assembly hole; 214 - Connecting protrusion; 220 - Second housing part; 2200 - Air outlet; 221 - Power socket; 2211 - Positive power slot; 2212 - Negative power slot; 222 - Signal slot; 2221 - Positive signal slot; 2222 - Negative signal slot; 223 - Constraint engagement part; 224 - Connecting part; 2241 - Arc-shaped clearance groove; 225 - Snap-fit ​​groove; 226 - Second assembly hole; 230 - Supporting snap-fit ​​part; 231-Fixing plate; 232-First support plate; 233-Second support plate; 240-Third support plate; 250 - Guide rail; 300 - Reinforcing structure; 301 - First section; 302 - Transition section; 303 - Second section; 304 - Hole; 3041 - First Hole; 3042 - Second Hole; 310 - First Reinforcing Structure; 311 - First corner reinforcement structure; 312 - Second corner reinforcement structure; 320 - Second reinforcement structure; 321 - Third corner reinforcement structure; 322 - Fourth corner reinforcement structure; 400 - Reinforcing member; 410 - First reinforcing rib; 420 - Second reinforcing rib; 430 - Third reinforcing rib; 500 - Supporting structure; 501 - Channel; 5011 - First channel; 5012 - Second channel; 510 - First support structure; 520 - Second support structure; 600 - Circuit board; 610 - Drain hole; 700 - Conductive connection part; 701 - Conductive sheet; 710 - Positive electrode connection; 720 - Negative electrode connection; 730 - Conductive lead-out portion; 731 - First lead-out section; 732 - Second lead-out section; 733 - Bent lead-out section; 7301 - Positive electrode edge lead-out section; 7302 - Negative electrode edge lead-out section; 800 - First gap; 900 - Power terminal; 901 - First power terminal; 902 - Second power terminal; 910 - Positive power terminal; 920 - Negative power terminal; 1000 - Signal terminal; 1010 - Positive signal terminal; 1020 - Negative signal terminal; 1100 - Second insulating barrier; 1200 - First baffle; 1211 - First partition; 1212 - First connecting plate; 1213 - First liquid outlet; 1300 - Second baffle; 1311 - Second baffle plate; 1312 - Second connecting plate; 1313 - Second liquid outlet; 1400 - Third insulating barrier; 1500 - Fourth insulating barrier; 1600 - First insulating connection; 1700 - Second insulating connection; 1800 - Sealing assembly; 1810 - Sealing plate; 1811 - Fastening plate; 18111 - First connection hole; 18112 - Heat dissipation hole; 1812 - Heat conduction plate; 18121 - Second connection hole; 1820 - Sealing ring section; 1900 - Insulating seal; 2000 - Annular seal; 2100 - Locking mechanism; 2110 - Operating component; 2120 - Locking component. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0013] The battery device and power tool assembly provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0014] refer to Figures 1-22 The present application provides a battery device for use in power tools. The battery device may include a battery housing 10, at least two battery cells 20 and at least two sets of power terminals 900.

[0015] The battery unit 20 is disposed within the battery housing 10, which protects the battery unit 20. The battery housing 10 may have a power slot 221 for inserting a plug into a power tool; portions of each set of power terminals 900 are disposed within the power slot 221 and can be electrically connected to the plug to achieve electrical connection between the battery device and the power tool, enabling the battery device to supply power to the power tool. For example, the battery device also includes a circuit board 600, with the power terminals 900 electrically connected to the circuit board 600, and the circuit board 600 electrically connected to the battery unit 20.

[0016] Each set of power terminals 900 is spaced apart along the insertion direction of the plug; each set of power terminals 900 is electrically connected to a set of battery strings, each set of battery strings includes battery cells 20, and the number of battery cells 20 in each set of battery strings is different, so that each set of power terminals 900 outputs a voltage of different levels.

[0017] Here, the battery cells 20 in each battery string are connected in series.

[0018] In this embodiment of the application, by providing at least two sets of power terminals 900 in the battery device, and each set of power terminals 900 being electrically connected to a battery string composed of a different number of battery cells 20, the same battery device can output at least two different voltage levels to adapt to power tools with different operating voltages, significantly improving the versatility and utilization of the battery device, and reducing the cost for users to equip multiple battery devices for power tools with different voltage specifications.

[0019] At least a portion of each set of power terminals 900 is disposed within the power slot 221 and spaced apart along the insertion direction of the plug. This reduces the number of slots on the battery housing 10 and improves space utilization, making the battery device more compact and suitable for compact power tools. Furthermore, the separate arrangement of the power terminals 900 along the insertion direction of the plug allows for a greater relative distance between adjacent sets of power terminals 900. This increases the safety distance between adjacent sets of power terminals 900, reduces the risk of short circuits caused by terminals 900 being too close together, and significantly improves the electrical safety performance of the battery device.

[0020] Furthermore, the spacing between the power terminals 900 along the insertion direction of the plug facilitates the formation of more adequate insulation zones between them. This allows for the addition of isolation zones or insulating components between adjacent power terminals 900, increasing the flexibility of insulation design and improving the overall safety performance of the battery device. Simultaneously, it helps to disperse current paths, improve heat dissipation, and thus enhance the current carrying capacity of the electrical electronics.

[0021] In an optional embodiment, the voltage levels output by the power terminals 900 increase sequentially along the insertion direction of the plug. This arrangement allows for sequential contact during plug insertion, facilitating graded connection of different voltages and thus improving power supply stability and connection reliability. Simultaneously, by using power terminals 900 at different positions or depths, it prevents power terminals 900 with higher output voltages from connecting to power tools with lower operating voltages, preventing mis-plugging and improving the identification and safety of different voltage outputs.

[0022] In other embodiments, the voltage level at the power output terminal may decrease or remain unchanged along the insertion direction of the plug.

[0023] In this embodiment, the battery device may include two power terminals 900, namely a first power terminal 901 and a second power terminal 902. The first power terminal 901 and the second power terminal 902 are spaced apart along the insertion direction of the plug, and the output voltage of the first power terminal 901 is lower than the output voltage of the second power terminal 902. For example, the first power terminal 901 can output a voltage of 18V, and the second power terminal 902 can output a voltage of 36V.

[0024] In an optional embodiment, the heights of each set of power terminals 900 are the same in the thickness direction of the battery device, and the thickness direction of the battery device intersects with the insertion direction of the plug. For example, the thickness direction of the battery device can be a first direction as described below, the insertion direction of the plug can be parallel to the length direction of the battery device, and the length direction of the battery device can be a second direction as described below.

[0025] A first insulating partition is provided between two adjacent sets of electrical terminals 900. In the thickness direction of the battery device, the height of the first insulating partition is lower than the height of the electrical terminals 900, allowing the connector of the plug to pass over the first insulating partition and make electrical connection with the electrical terminals 900. In this embodiment, the first insulating partition separates two adjacent sets of electrical terminals 900, preventing direct contact or arcing between electrical terminals 900 of different voltage levels. It also forms a physical barrier, preventing dust, metal debris, moisture, etc., from forming a conductive path between adjacent sets of electrical terminals 900, effectively improving electrical safety and avoiding the risk of short circuits and arcing. Simultaneously, the lower height of the first insulating partition allows the conductive contacts of the plug to smoothly pass over the first insulating partition when inserted, ensuring reliable contact with the electrical terminals 900.

[0026] In other embodiments, the first insulating barrier may not be provided between two adjacent sets of power terminals 900.

[0027] In an optional embodiment, the power terminal 900 includes a positive power terminal 910 and a negative power terminal 920. At least a portion of the positive power terminal 910 and at least a portion of the negative power terminal 920 are located within the power slot 221. The positive power terminal 910 is used for electrical connection with the positive connection terminal of the plug, and the negative power terminal 920 is used for electrical connection with the negative connection terminal of the plug, so that the battery device can supply power to the power tool. The positive power terminal 910 and the negative power terminal 920 are spaced apart along the width of the power slot 221. This facilitates the positive and negative connection terminals of the power tool's plug to respectively contact the positive power terminal 910 and the negative power terminal 920, forming a power supply circuit and enabling a stable electrical connection between the power tool and the battery device.

[0028] For example, the power socket 221 includes a positive power socket 2211 and a negative power socket 2212, with at least a portion of the positive power terminal 910 of each power terminal 900 located in the positive power socket 2211, and at least a portion of the negative power terminal 920 of each power terminal 900 located in the negative power socket 2212.

[0029] The first insulating barrier includes a first barrier 1200 and a second barrier 1300. The first barrier 1200 is disposed between two adjacent positive power terminals 910, and the second barrier 1300 is disposed between two adjacent negative power terminals 920.

[0030] The first partition 1200 includes at least two first partitions 1211, each of which is spaced apart along the insertion direction of the plug; the second partition 1300 includes at least two second partitions 1311, each of which is spaced apart along the insertion direction of the plug. This arrangement is equivalent to adding multiple bends, steps, and barriers to the insulation path between two adjacent positive power terminals 910 and two adjacent negative power terminals 920. For current or leakage to creep from one level to another along the surface, it must bypass each partition, thus forcibly lengthening the creepage path. This effectively increases the creepage distance between two adjacent negative power terminals 920, reducing the risk of creepage short circuits.

[0031] In other embodiments, the first partition 1200 includes a first partition 1211, and the second partition 1300 includes a second partition 1311.

[0032] like Figure 8As shown, the first partition 1200 extends along the direction from the negative power terminal 920 to the positive power terminal 910 to guide the liquid around the positive power terminal 910 to flow in the direction from the negative power terminal 920 to the positive power terminal 910, that is, to guide the liquid around the positive power terminal 910 to flow away from the negative power terminal 920; the second partition 1300 extends along the direction from the positive power terminal 910 to the negative power terminal 920 to guide the liquid around the negative power terminal 920 to flow in the direction from the positive power terminal 910 to the negative power terminal 920, that is, to guide the liquid around the negative power terminal 920 to flow away from the positive power terminal 910. This design makes it difficult for the liquid around the positive terminal 910 and the liquid around the negative terminal 920 to mix, thus making it difficult for the liquid to form a conductive path between the positive terminal 910 and the negative terminal 920. This helps to reduce the risk of short circuits and improve the safety and reliability of the battery device.

[0033] Optionally, such as Figure 8 As shown, two adjacent first separators 1211 are sealed together near the edge of the battery cell 20 via a first connecting plate 1212. This arrangement ensures that the creepage path between two adjacent positive power terminals 910 must bypass each first separator 1211 and run along the first connecting plate 1212, preventing current or leakage from passing through the gap between the first separator 1211 and the circuit board 600.

[0034] like Figure 8 As shown, two adjacent second separators 1311 are sealed together near the edge of the battery cell 20 via a second connecting plate 1312. This arrangement ensures that the creepage path between two adjacent negative power terminals 920 must bypass each second separator 1311 and run along the second connecting plate 1312, preventing current or leakage from passing through the gap between the second separator 1311 and the circuit board 600.

[0035] In this embodiment, the space enclosed by two adjacent first partitions 1211 and first connecting plates 1212 has a first liquid outlet 1213 on the side away from the negative power terminal 920, so that the liquid between the two adjacent first partitions 1211 flows in the direction away from the negative power terminal 920. The space enclosed by two adjacent second partitions 1311 and second connecting plates 1312 has a second liquid outlet 1313 on the side away from the positive power terminal 910, so that the liquid between the two adjacent second partitions 1311 flows in the direction away from the positive power terminal 910.

[0036] In an optional embodiment, a second insulating barrier 1100 is provided between the positive power terminal 910 and the negative power terminal 920. In this embodiment, the second insulating barrier 1100 can form a physical isolation, preventing direct contact between the positive power terminal 910 and the negative power terminal 920, effectively preventing short circuits between the positive and negative terminals; at the same time, the second insulating barrier 1100 raises the insulation path between the positive power terminal 910 and the negative power terminal 920, increasing the creepage distance and electrical clearance between the positive power terminal 910 and the negative power terminal 920, reducing the risk of leakage and creepage breakdown caused by dust, moisture, metal debris, etc. Here, as... Figure 8 As shown, the second insulating barrier 1100 extends along the insertion direction of the plug.

[0037] In the thickness direction of the battery device, the height of the second insulating partition 1100 is lower than the height of the positive power terminal 910 and the negative power terminal 920.

[0038] In other embodiments, the second insulating barrier 1100 may not be provided between the positive power terminal 910 and the negative power terminal 920.

[0039] Optionally, to prevent liquid around the edge power terminal 900 from flowing in the second direction, a fourth insulating barrier 1500 may be provided on the side of the edge power terminal 900 away from the first insulating barrier in the second direction, so as to prevent the liquid at the edge power terminal 900 from flowing in the second direction and accumulating on the circuit board 600 or flowing in the third direction, which may easily cause a short circuit between the positive power terminal 910 and the negative power terminal 920.

[0040] In an optional embodiment, a signal slot 222 may also be provided on the battery housing 10, and the battery device may also include a signal terminal 1000, at least a portion of which is located in the signal slot 222, so as to enable the power tool to communicate with the battery device, thereby facilitating the monitoring of the actual situation of the battery device (such as temperature, power, working status, etc.).

[0041] In the width direction of the power slot 221, the power slot 221 and the signal slot 222 are spaced apart. This arrangement makes full use of the space in the width direction of the battery device without increasing the length or thickness of the battery device. Furthermore, separating the power slot 221 for power supply from the signal slot 222 for communication, so that the power terminal 900 and the signal terminal 1000 belong to different slots, avoids electromagnetic interference to the communication signal from the high-current power supply circuit. For example, the signal terminal 1000 is spaced apart from the power terminal 900 near the socket of the power slot 221. For example, the width direction of the battery device is the third direction described below.

[0042] In other embodiments, the signal slot 222 may not be provided on the battery housing 10, and the battery device may not include the signal terminal 1000.

[0043] In an optional embodiment, a third insulating barrier 1400 is provided between the signal terminal 1000 and the power terminal 900. This third insulating barrier provides physical isolation between the power supply circuit and the signal circuit, preventing interference from high currents and high voltages on the communication signal and ensuring stable signal transmission. Simultaneously, it increases the creepage distance and clearance between the signal terminal 1000 and the power terminal 900, preventing short circuits, leakage, or breakdowns between the power supply and communication circuits caused by foreign objects, moisture, or metal debris, effectively improving the overall safety of the battery device. Furthermore, the third insulating barrier 1400 prevents the power terminal 900 from deforming and contacting the signal terminal 1000 when the plug is inserted.

[0044] In other embodiments, the third insulating barrier 1400 may not be provided between the signal terminal 1000 and the power terminal 900.

[0045] For example, in the thickness direction of the battery device, the height of the third insulating barrier 1400 can be equal to or higher than the height of the signal terminal 1000 and the power terminal 900. With this configuration, when the connector of the plug is misaligned during insertion, the third insulating barrier 1400 can prevent the connector of the plug from entering the signal slot 222 and contacting the signal terminal 1000.

[0046] Optionally, the signal terminal 1000 includes a positive signal terminal 1010 and a negative signal terminal 1020, and the second insulating barrier 1100 may be located between the positive signal terminal 1010 and the negative signal terminal 1020. This configuration allows for physical isolation between the positive signal terminal 1010 and the negative signal terminal 1020, as well as between the positive power terminal 910 and the negative power terminal 920, through the second insulating barrier 1100. For example, the signal slot 222 includes a positive signal slot 2221 and a negative signal slot 2222, with at least a portion of the positive signal terminal 1010 located within the positive signal slot 2221 and at least a portion of the negative signal terminal 1020 located within the negative signal slot 2222, facilitating electrical connection with the signal plug.

[0047] Of course, the second insulating barrier 1100 may not be provided between the positive signal terminal 1010 and the negative signal terminal 1020.

[0048] In an optional embodiment, the circuit board 600 is disposed within the protective housing 200 described below, the power terminal 900 is located on the side of the circuit board 600 away from the battery cell 20 and is electrically connected to the circuit board 600, and the first partition 1200, the second partition 1300, the second insulating partition 1100 and the third insulating partition 1400 are all connected to the circuit board 600.

[0049] like Figure 8 As shown, the circuit board 600 is provided with at least two drain holes 610, and at least one drain hole 610 is provided between the second insulating partition 1100 and each of the two adjacent third insulating partitions 1400. This arrangement allows liquid around the positive signal terminal 1010 and the negative signal terminal 1020 to be drained through the drain holes 610 respectively, which can effectively prevent liquid from accumulating around the positive signal terminal 1010 and the negative signal terminal 1020, thereby effectively reducing the risk of short circuits in the power terminal 900 and the signal terminal 1000, as well as the risk of circuit corrosion.

[0050] In other embodiments, the drain hole 610 may not be provided on the circuit board 600.

[0051] In optional embodiments, such as Figure 8 As shown, one end of the second insulating barrier 1100 and one end of the two third insulating barriers 1400 are connected by the first insulating connection 1600, and the other end of the second insulating barrier 1100 and the other end of the two third insulating barriers 1400 are connected by the second insulating connection 1700. With this configuration, the first insulating connection 1600 and the second insulating connection 1700 can enclose the second insulating barrier 1100 and the two third insulating barriers 1400 to form a relatively closed independent chamber, which can effectively prevent liquid from flowing between the positive electrode energy region, the negative electrode energy region, and the signal region, avoid liquid cross-polarity and cross-regional contact, and further reduce the risk of short circuit.

[0052] The first partition 1200 and the second partition 1300 are respectively connected to the two third insulating partitions 1400.

[0053] This design allows all the partitions to be connected into a single insulating frame structure, resulting in higher strength, less swaying, shifting, or deformation. It ensures that the insulation gap and creepage distance between the terminals remain stable, improving long-term reliability.

[0054] In an optional embodiment, the battery housing 10 may include a battery cell housing 100 and a protective housing 200. The battery cell housing 100 is used to house the battery cells 20 of the battery device, providing basic protection, insulation, and sealing for the battery cells 20. The protective housing 200 covers the battery cell housing 100. This configuration can effectively improve the overall structural strength of the battery housing 10. When the battery device is impacted, the impact force can preferentially act on the protective housing 200. As an independent rigid structure, the protective housing 200 can diffuse locally concentrated impact forces (such as single-point impacts during drops) to a larger area through its own housing structure, converting concentrated force into distributed force, thereby significantly reducing the impact intensity, reducing the impact force on the internal battery cells 20, and improving the protection effect on the battery cells 20.

[0055] Here, the power socket 221 is located on one side of the protective housing 200 in the first direction.

[0056] At least two reinforcing structures 300 may be provided on the outer wall of at least one of the battery cell housing 100 and the protective housing 200. These at least two reinforcing structures 300 include a first reinforcing structure 310 and a second reinforcing structure 320, located on opposite sides of the battery housing 10 in a second direction. This arrangement allows the first reinforcing structure 310 and the second reinforcing structure 320 to form an enclosed rigid protective frame, which is beneficial for resisting external loads from different directions (such as drops, side impacts, etc.). Furthermore, the reinforcing structures 300, located on the battery cell housing 100, the protective housing 200, or both, can form triple protection with an inner shell, an outer shell, and reinforcing structures 300, effectively improving the structural strength of the battery housing 10 and the protective performance of the battery cell 20.

[0057] like Figure 3 As shown, each reinforcing structure 300 includes a first segment 301 and a second segment 303 connected to the first segment 301. The first segment 301 extends along a first direction, and the second segment 303 is located on the side of the battery housing 10 away from the power slot 221, and extends along a second direction. This arrangement allows each reinforcing structure 300 to form a rigid corner support, improving the overall rigidity and deformation resistance of the battery housing 10. Simultaneously, the second segment 303, located on the side away from the power slot 221, does not occupy the power slot 221's position, does not affect the insertion and connection of the battery device with the power tool, and provides focused reinforcement to the part far from the power slot 221 that is more susceptible to drop impacts.

[0058] In this embodiment, the battery casing 10 includes a battery cell casing 100 and a protective casing 200 covering the battery cell casing 100. This effectively improves the overall structural strength of the battery casing 10. When the battery is impacted, the impact force is preferentially applied to the protective casing 200 and transmitted and diffused within it, thus mitigating the impact on the battery cell casing 100 and reducing the impact on the internal battery cells 20, thereby improving the protection of the battery cells 20. Simultaneously, by providing a reinforcing structure 300 on the outer wall of the battery cell casing 100 and / or the protective casing 200, a stiffness difference is created between the local area where the reinforcing structure 300 is located and other areas of the battery casing 10, thereby forming a rigid reinforcement area on the battery casing 10. When the battery casing 10 is subjected to a drop impact, the impact load is preferentially absorbed by the rigid reinforcement area and transmitted and diffused along the reinforcing structure 300, preventing the impact load from concentrating on a local location. This reduces the risk of impact transmission from the protective casing 200 to the battery cell casing 100 and the battery cells 20, thereby further improving the battery's impact resistance.

[0059] Optionally, the battery cell housing 100 may include two half-shells 110, which can be joined together to form a space for accommodating the battery cell 20. This facilitates the installation and removal of the battery cell 20.

[0060] In an optional embodiment, the reinforcing structure 300 is disposed on the outer wall of the protective housing 200. In the third direction, a first gap 800 is provided between the battery cell housing 100 and the protective housing 200. In the second direction, the orthographic projections of the first reinforcing structure 310 and the second reinforcing structure 320 both cover the first gap 800. The first direction, the second direction and the third direction intersect each other.

[0061] In this embodiment, a first gap 800 is provided between the battery cell housing 100 and the protective housing 200. When the protective housing 200 is subjected to external impact, the first gap 800 can provide deformation buffer space to prevent the impact force from being directly and rigidly transmitted to the battery cell housing 100, thereby further reducing the impact load on the internal battery cell 20. At the same time, by having the first reinforcing structure 310 and the second reinforcing structure 320 respectively cover the first gap 800, the strength and rigidity of the side wall of the battery housing 10 in the second direction caused by the first gap 800 between the battery cell housing 100 and the protective housing 200 can be compensated, ensuring the overall structural rigidity of the side wall of the battery housing 10, so as to achieve a balance between structural strength and buffer protection.

[0062] In other embodiments, the first gap 800 may not be provided between the battery cell housing 100 and the protective housing 200.

[0063] In an optional embodiment, the protective housing 200 may include a first housing portion 210 and a second housing portion 220, the second housing portion 220 being connected to the first housing portion 210 to form a space for accommodating the battery unit housing 100. A power slot 221 is disposed on the second housing portion 220, and a reinforcing structure 300 is disposed on the outer wall of the first housing portion 210. This arrangement, on the one hand, allows external impacts to be absorbed and diffused by the protective housing 200, reducing the impact on the internal battery unit housing 100 and battery unit 20, thus improving the protective effect; on the other hand, the reinforcing structure 300 does not occupy the space accommodating the battery unit 20, which is beneficial for improving the space utilization rate inside the protective housing 200.

[0064] In other embodiments, the reinforcing structure 300 may also be disposed on the outer wall of the battery cell housing 100.

[0065] In an optional embodiment, in the third direction, the protective housing 200 has a first sidewall and a second sidewall, and a reinforcing member 400 is provided on both the first and second sidewalls. The reinforcing members 400 on the first and second sidewalls are respectively disposed opposite to the two pole portions 21 of the battery unit 20. With this configuration, when the battery device is subjected to external impact or compression, the reinforcing member 400 can provide rigid protection for the ends of the battery unit 20, avoiding the risk of short circuits, leakage, etc. caused by the direct compression of the positive pole portion 2101 and negative pole portion 2102 of the battery unit 20 after the battery housing 10 is deformed, thereby further improving the protective effect of the battery housing 10 on the battery unit 20.

[0066] In other embodiments, neither the first sidewall nor the second sidewall may be provided with a reinforcing member 400.

[0067] Multiple reinforcing members 400 can be provided on both the first and second sidewalls, and each reinforcing member 400 corresponds to each battery unit 20.

[0068] Optionally, the reinforcing member 400 on the first sidewall can be disposed on the side of the first sidewall facing away from the battery cell 20, and the reinforcing member 400 on the second sidewall can be disposed on the side of the second sidewall facing away from the battery cell 20, that is, the reinforcing members 400 are all disposed on the outer wall of the protective housing 200. This arrangement, on the one hand, ensures that the reinforcing members 400 do not occupy the internal space of the protective housing 200, which is conducive to arranging more battery cells 20 within the protective housing 200 and improving the capacity and energy density of the battery device; on the other hand, it makes it less likely that the reinforcing members 400 will directly act on the battery cell 20, thereby avoiding damage to the battery cell 20 due to external pressure, and further improving the protection effect on the battery cell 20.

[0069] Of course, the reinforcing member 400 on the first sidewall can also be provided on the side of the first sidewall close to the battery unit 20, and the reinforcing member 400 on the second sidewall can also be provided on the side of the second sidewall close to the battery unit 20, that is, the reinforcing member 400 can be provided on the inner wall of the protective housing 200.

[0070] In an optional embodiment, the reinforcing member 400 may include a first reinforcing rib 410, a second reinforcing rib 420, and a third reinforcing rib 430. The first reinforcing rib 410, the second reinforcing rib 420, and the third reinforcing rib 430 are distributed circumferentially around the battery cell 20, and all three extend radially outward from the center of the battery cell 20. This arrangement allows the lines connecting the ends of the first reinforcing rib 410, the second reinforcing rib 420, and the third reinforcing rib 430 near the center of the battery cell 20 to form a triangle, and the lines connecting the ends of the first reinforcing rib 410, the second reinforcing rib 420, and the third reinforcing rib 430 away from the center of the battery cell 20 to form a triangle. The stability of the triangular structure can effectively enhance the reinforcing effect of the reinforcing member 400 on the protective shell 200, giving the protective shell 200 higher structural strength and stiffness in multiple stress directions, effectively suppressing deformation and collapse, thereby effectively improving the structural strength and stiffness of the battery shell 10.

[0071] In other embodiments, the reinforcement 400 may also include only one or two reinforcing ribs.

[0072] In an optional embodiment, the battery casing 10 has a first corner, a second corner, a third corner and a fourth corner, the first corner and the second corner are arranged along a third direction, the third corner and the fourth corner are arranged along a third direction, and the first corner and the third corner are arranged opposite to each other, and the second corner and the fourth corner are arranged opposite to each other.

[0073] A first reinforcing structure 310 is provided at both the first and second corners, and a second reinforcing structure 320 is provided at both the third and fourth corners. For example, the first reinforcing structure 310 at the first corner can be a first corner reinforcing structure 311, the first reinforcing structure 310 at the second corner can be a second corner reinforcing structure 312, the second reinforcing structure 320 at the third corner can be a third corner reinforcing structure 321, and the second reinforcing structure 320 at the fourth corner can be a fourth corner reinforcing structure 322.

[0074] In this embodiment, since the corners are the first parts to hit the ground when falling, by providing corresponding reinforcing structures 300 at the four corners of the battery housing 10, the corners of the battery housing 10 can be reinforced. When the battery device falls, the reinforcing structures 300 at the corners can withstand the impact, thereby effectively protecting the side walls and planar areas of the battery housing 10 from direct damage. At the same time, it can also reduce the transmission of impact to the interior of the battery housing 10, further protecting the internal battery cells 20.

[0075] In other embodiments, the first reinforcing structure 310 may not be provided at either the first or the second corner, and the first reinforcing structure 310 may be located between the first and the second corner; the second reinforcing structure 320 may not be provided at either the third or the fourth corner, and the second reinforcing structure 320 may be located between the third and the fourth corner.

[0076] In an optional embodiment, in the third direction, the distance between the opposite sides of the first reinforcing structure 310 at the first corner and the first reinforcing structure 310 at the second corner gradually decreases; in the third direction, the distance between the opposite sides of the second reinforcing structure 320 at the third corner and the second reinforcing structure 320 at the fourth corner gradually decreases.

[0077] This design allows each reinforcing structure 300 to gradually narrow towards each other, creating a smooth sloping transition on the outer side of the reinforcing structure 300. This reduces stress concentration and the risk of impact damage during drop collisions. It also improves the torsional and pressure resistance of the battery casing 10, making the battery casing 10 more aesthetically pleasing.

[0078] In other embodiments, in the third direction, the distance between the opposite sides of the first reinforcing structure 310 at the first corner and the first reinforcing structure 310 at the second corner may gradually increase or remain unchanged; in the third direction, the distance between the opposite sides of the second reinforcing structure 320 at the third corner and the second reinforcing structure 320 at the fourth corner may also gradually increase or remain unchanged.

[0079] In an optional embodiment, the reinforcing structure 300 further includes a transition section 302, through which the first section 301 is connected to the second section 303.

[0080] Along the direction from the first reinforcing structure 310 to the second reinforcing structure 320, the distance between the side of the transition section 302 of the first reinforcing structure 310 facing away from the second reinforcing structure 320 and the second reinforcing structure 320 gradually decreases; similarly, along the direction from the second reinforcing structure 320 to the first reinforcing structure 310, the distance between the side of the transition section 302 of the second reinforcing structure 320 facing away from the first reinforcing structure 310 and the first reinforcing structure 310 gradually decreases. This design allows the outer wall of the transition section 302 to slope and converge, eliminating sharp right angles and abrupt steps, making it less prone to damage upon impact and preventing stress concentration. It also improves the aesthetics of the battery casing 10.

[0081] Of course, along the direction from the first reinforcing structure 310 to the second reinforcing structure 320, the distance between the side of the transition section 302 of the first reinforcing structure 310 facing away from the second reinforcing structure 320 and the second reinforcing structure 320 can also remain unchanged; along the direction from the second reinforcing structure 320 to the first reinforcing structure 310, the distance between the side of the transition section 302 of the second reinforcing structure 320 facing away from the first reinforcing structure 310 and the first reinforcing structure 310 can also remain unchanged.

[0082] In this embodiment, in the second direction, the distance between the opposite sides of the first segment 301 of the first reinforcing structure 310 and the first segment 301 of the second reinforcing structure 320 is greater than or equal to the maximum distance between the opposite sides of the transition segment 302 of the first reinforcing structure 310 and the transition segment 302 of the second reinforcing structure 320. One end of the transition segment 302 opposite to the power socket 221 is flush with the side of the second segment 303 opposite to the power socket 221, or the side of the second segment 303 opposite to the power socket 221 protrudes from the transition segment 302. This arrangement ensures that the transition segment 302 does not protrude from the first segment 301 and the second segment 303, thereby preventing the reinforcing structure 300 from forming outwardly protruding bulges or corners.

[0083] In an optional embodiment, multiple holes 304 are provided on both the first section 301 and the second section 303, with the holes 304 spaced apart. This arrangement has two advantages: firstly, the spaced holes 304 optimize the stress distribution of the reinforcing structure 300, preventing localized stress concentration and improving the structural stability of the battery casing 10 under impact; secondly, it alters the impact load transmission path, allowing the impact force to diffuse more evenly across the reinforcing structure 300; and thirdly, it absorbs some of the impact energy, reducing the rigid transmission of the impact force to the protective casing 200 and minimizing the impact on the battery casing 10 and the internal battery cells 20. Finally, it reduces material usage and the overall weight of the battery casing 10 while maintaining the overall strength and support stiffness of the reinforcing structure 300, achieving a lightweight design.

[0084] Optionally, the hole 304 is a triangular hole. In this embodiment, since a triangle has a stable geometric structure, while reducing weight by opening the hole 304, the structural rigidity and support strength of the reinforcing structure 300 itself can be guaranteed, making it less prone to local instability or damage; at the same time, the corner structure of the triangular hole can effectively disperse stress during impact, reduce stress concentration, thereby improving the impact resistance of the reinforcing structure 300 and ensuring the structural stability of the battery casing 10.

[0085] In other embodiments, the hole 304 may not be a triangular hole. For example, the hole 304 may be a round hole, a rectangular hole, or a hole of other shapes.

[0086] In an optional embodiment, each of the plurality of holes 304 on the first segment 301 and the second segment 303 includes a plurality of first holes 3041 and a plurality of second holes 3042. In a first direction, the first holes 3041 and the second holes 3042 on the first segment 301 are arranged alternately; in a second direction, the first holes 3041 and the second holes 3042 on the second segment 303 are arranged alternately.

[0087] The first hole 3041 and the second hole 3042 are arranged symmetrically at the center.

[0088] In this embodiment, the centrally symmetrical arrangement of the first hole 3041 and the second hole 3042 results in a difference in the force transmission direction of adjacent first holes 3041 and second holes 3042. When the reinforcing structure 300 is impacted, the impact force can be guided to different directions for dispersed transmission, avoiding the concentrated transmission of impact load along a single path. This allows for more effective dissipation of impact energy and reduces the impact on the protective shell 200. Simultaneously, the centrally symmetrical arrangement of the first hole 3041 and the second hole 3042 makes the material distribution and stiffness distribution of the reinforcing structure 300 more balanced, avoiding localized weakness due to a single opening method, and improving the overall structural strength and stability of the reinforcing structure 300. Furthermore, the centrally symmetrical arrangement of the triangular holes can form a continuous rib structure, which strengthens the reinforcing structure 300, further enhancing its overall rigidity. This makes it less prone to localized failure under drop impact conditions, improving the protective effect of the battery shell 10 on the battery cell 20.

[0089] In other embodiments, the first hole 3041 and the second hole 3042 may not be arranged in a centrally symmetrical manner. For example, the arrangement directions of the first hole 3041 and the second hole 3042 are exactly the same.

[0090] In one optional embodiment, the hole 304 penetrates the reinforcing structure 300 along a third direction. This configuration has several advantages. First, the through-hole 304 reduces the material usage of the reinforcing structure 300, facilitating weight reduction. It also helps to make the material and stiffness distribution of the reinforcing structure 300 more uniform. Second, during the use, placement, or cleaning of the battery device, dust, debris, or wastewater entering the hole 304 can be easily discharged through it, preventing accumulation within the hole 304. This avoids corrosion or localized stress concentration caused by the accumulation of debris, thus extending the service life of the battery casing 10.

[0091] Of course, the 304 hole may not penetrate the reinforcing structure 300.

[0092] In another alternative embodiment, the plurality of holes 304 in the first segment 301 and the second segment 303 each include a plurality of third holes and a plurality of fourth holes, both of which are blind holes. In a first direction, the third holes and fourth holes in the first segment 301 are arranged alternately, and in a second direction, the third holes and fourth holes in the second segment 303 are arranged alternately.

[0093] In the third direction, the reinforcing structure 300 is symmetrical about the first plane, and the third hole and the second hole 3042 are located on both sides of the first plane, and the first direction, the second direction and the third direction intersect each other.

[0094] In this embodiment, both the third and fourth holes are blind holes and do not penetrate the reinforcing structure 300. This allows for weight reduction and stress dispersion while maintaining the local continuity and integrity of the reinforcing structure 300, preventing a significant decrease in rigidity due to through holes. This helps maintain and improve the structural strength of the reinforcing structure 300. In the third direction, the reinforcing structure 300 is symmetrical about the first plane, and the third and fourth holes are located on opposite sides of the first plane. This allows for a more uniform material and stiffness distribution, and a more balanced transfer of impact loads, avoiding unilateral weakness or stress imbalance, further enhancing structural strength and impact resistance. The alternating arrangement of the third and fourth holes, combined with a symmetrical layout, allows impact stress to be dispersed and transmitted in multiple directions within the reinforcing structure 300, reducing local stress concentration and improving overall impact resistance without significantly reducing rigidity.

[0095] In other embodiments, the third and fourth holes may not be arranged alternately; for example, the center lines of the third and fourth holes may be on the same straight line.

[0096] In an optional embodiment, the reinforcing structure 300 and the protective housing 200 are an integral structure. This arrangement can reduce the number of connecting structures and improve the connection stability between the reinforcing structure 300 and the protective housing 200.

[0097] Alternatively, the reinforcing structure 300 can be detachably connected to the protective housing 200, which facilitates replacement if the reinforcing structure 300 is damaged.

[0098] In an optional embodiment, the protective housing 200 has a first wall and a second wall, which are connected by an inclined wall. Along the direction from the first segment 301 to the second segment 303, the distance between the inclined wall and the centerline of the protective housing 200 in a third direction gradually decreases. Exemplarily, the second wall is the side of the second end wall 201 that faces away from the first end wall, as described below.

[0099] The first section 301 is positioned opposite to the first wall surface, the second section 303 is positioned opposite to the second wall surface, and the transition section 302 is positioned opposite to the inclined wall surface; the distance between the side of the first section 301 facing away from the first wall surface and the first wall surface, the distance between the side of the second section 303 facing away from the second wall surface and the second wall surface, and the distance between the side of the transition section 302 facing away from the inclined wall surface and the inclined wall surface are equal.

[0100] In this embodiment, the transition section 302 corresponds to the inclined wall surface and can be well adapted to the inclined shape of the protective shell 200, providing effective support and reinforcement to the inclined wall area, so that the protective shell 200 is uniformly and reliably reinforced in both the straight wall section and the inclined wall section. Along the direction from the first section 301 to the second section 303, the distance between the inclined wall surface and the center line gradually decreases, and the distance between the side of the first section 301, the transition section 302 and the second section 303 facing away from the corresponding wall surface is equal to that of the corresponding wall surface, so that the transition section 302 does not protrude from the first section 301 and the second section 303, and the outer surface of the reinforcing structure 300 forms a continuous, stepless, smooth surface with a regular appearance. At the same time, it avoids stress concentration caused by local protrusions or depressions, which can effectively improve the overall aesthetics and structural reliability of the battery shell 10.

[0101] Optionally, at least two spaced holes 304 may be provided on the transition section 302. This arrangement allows the spaced holes 304 to optimize the stress distribution in the transition section 302, preventing localized stress concentration and altering the impact load transmission path. This allows the impact force to diffuse more evenly across the transition section 302 of the reinforced structure 300, and also absorbs some of the impact energy, reducing the rigid transmission of the impact force from the transition section 302 to the protective shell 200.

[0102] Of course, the hole 304 may not be provided on the transition section 302.

[0103] In optional embodiments, such as Figure 2 and Figure 9 As shown, a limiting engagement portion 120 is provided on one of the battery cell housing 100 and the protective housing 200, and a limiting space is provided on the other. The limiting engagement portion 120 is located within the limiting space. In the second direction and / or the third direction, the limiting engagement portion 120 engages with the wall surface forming the limiting space. With this configuration, when the protective housing 200 is subjected to a large impact, the walls forming the limiting space can abut against each other to achieve a limiting effect. This effectively prevents large misalignment between the battery cell housing 100 and the protective housing 200, thereby reducing the risk of positional displacement and poor contact of the battery cell 20 and other related components within the battery cell housing 100.

[0104] Of course, the battery cell housing 100 and the protective housing 200 may not have the limiting engagement part 120 and the limiting space.

[0105] Optionally, the limiting space can be a limiting hole 211, and in the second direction and / or the third direction, the hole wall of the limiting hole 211 is spaced apart from the limiting engagement part 120. This arrangement allows the limiting engagement part 120 to not contact the hole wall of the limiting hole 211 under normal conditions, so that a gap channel is formed between the limiting engagement part 120 and the hole wall of the limiting hole 211, so that liquid inside the protective housing 200 and external airflow can flow through the gap channel, thereby achieving the effects of liquid drainage and heat dissipation.

[0106] In this embodiment, in the first direction, the protective housing 200 has a first end wall and a second end wall 201, the power slot 221 is disposed on the first end wall, the limiting hole 211 is disposed on the second end wall 201, and the limiting engagement part 120 is disposed on the side of the battery unit housing 100 near the second end wall 201.

[0107] Optionally, in the first direction, the size of the portion of the limiting engagement part 120 extending into the limiting hole 211 is less than or equal to the size of the limiting hole 211. This arrangement ensures that the limiting engagement part 120 does not protrude beyond the outer side of the protective housing 200, preventing the limiting engagement part 120 from contacting, scratching, or colliding with the mounting surface or external components, thus ensuring the stability and smoothness of the battery device during placement. Simultaneously, it allows for a certain amount of leeway in the first direction, enabling buffering and avoidance, preventing rigid jamming, and reducing structural stress and wear on the protective housing 200 and the battery cell housing 100, thereby improving the reliability of the battery device and extending its service life.

[0108] Of course, in the first direction, a portion of the limiting engagement part 120 may also extend out from the limiting hole 211.

[0109] In optional embodiments, such as Figure 14 As shown, the second end wall 201 has at least two wall portions 2010, including a first wall portion 2011 and a second wall portion 2012, and a limiting hole 211 is provided on the second wall portion 2012. Along the direction from the first end wall to the second end wall 201, the first wall portion 2011 protrudes from the second wall portion 2012. In this embodiment, the second end wall 201 adopts a structure in which the first wall portion 2011 protrudes from the second wall portion 2012, so that the second wall portion 2012 where the limiting hole 211 is located is relatively recessed to form a clearance space. On the one hand, the protruding first wall portion 2011 can protect the limiting hole 211 and the limiting engagement portion 120, reduce the direct effect of external impact on the limiting engagement portion 120, and ensure that the limiting engagement portion 120 and the hole wall limiting fit of the limiting hole 211 are stable and reliable. On the other hand, it can avoid the limiting engagement portion 120 from contacting and interfering with the mounting surface or external components, and improve the stability of the battery device placement. At the same time, the concave structure can form a fluid flow space, which is beneficial to protect the heat dissipation and drainage inside the housing 200, further improving the safety of the battery device and extending the service life of the battery device.

[0110] In other embodiments, the first wall portion 2011 may not protrude from the second wall portion 2012.

[0111] In optional embodiments, such as Figure 14 As shown, a fluid passage 212 is provided on the first wall portion 2011. This arrangement enables airflow exchange between the inside and outside of the protective housing 200 and facilitates the drainage of liquid inside the protective housing 200. This is beneficial for the dissipation of internal heat and the drainage of accumulated liquid during the operation of the battery device, avoiding safety hazards caused by internal overheating or liquid accumulation. At the same time, it can reduce the weight of the battery housing 10, achieving a lightweight design.

[0112] In other embodiments, the fluid through-hole 212 may not be provided on the first wall portion 2011.

[0113] Optionally, such as Figure 14 As shown, a fluid passage 212 can also be provided on the second wall portion 2012, which can further improve the heat dissipation effect of the battery device and is more conducive to the discharge of liquid inside the protective casing 200.

[0114] In optional embodiments, such as Figure 13As shown, a guide surface 2013 is provided on the side of the second wall portion 2012 near the first wall portion 2011. Along the direction from the second wall portion 2012 to the first wall portion 2011, the distance between the guide surface 2013 and the first wall portion 2011 gradually decreases in the first direction. This arrangement can guide the fluid entering the protective housing 200, allowing the water to flow more smoothly to the fluid passage 212 of the first wall portion 2011 and be discharged from the fluid passage 212, preventing liquids from accumulating inside the protective housing 200 and improving the drainage effect.

[0115] In other embodiments, the second wall portion 2012 may not have a guide surface 2013 on the side near the first wall portion 2011.

[0116] In optional embodiments, such as Figure 6 As shown, the side wall of the battery cell housing 100 near the second end wall 201 has at least two supporting and limiting portions 102. Each supporting and limiting portion 102 is distributed along a second direction, and each supporting and limiting portion 102 corresponds to a battery cell 20. The supporting and limiting portion 102 is used to accommodate at least a portion of the corresponding battery cell 20. In the second direction, the supporting and limiting portion 102 is in a limiting engagement with the corresponding battery cell 20. This arrangement can constrain the battery cell 20 in the second direction to prevent the battery cell 20 from shifting its position when subjected to vibration, impact, or compression, thus ensuring the stable arrangement of the battery cells 20.

[0117] like Figure 13 As shown, at least one supporting engagement portion 230 is provided on the side of the second end wall 201 facing the first end wall. The supporting engagement portion 230 is located between two adjacent supporting limiting portions 102, and in the second direction, the supporting engagement portion 230 is in limiting cooperation with the adjacent supporting limiting portion 102. This arrangement can effectively limit the movement and displacement of the protective housing 200 and the battery unit housing 100 in the second direction, and can effectively improve the positioning stability between the protective housing 200 and the battery unit housing 100.

[0118] In other embodiments, the side wall of the battery cell housing 100 near the second end wall 201 may not have the supporting and limiting part 102, and the side of the second end wall 201 facing the first end wall may not have the supporting and engaging part 230.

[0119] In an optional embodiment, in the third direction, the length of the limiting hole 211 is greater than or equal to the length of the support engagement portion 230. This arrangement avoids the formation of a blind zone at the support engagement portion 230, facilitating the drainage of liquid accumulated inside the protective housing 200 through the limiting hole 211 and preventing liquid from accumulating inside the protective housing 200.

[0120] Of course, in the third direction, the length of the limiting hole 211 can also be less than the length of the support and engagement part 230.

[0121] In an optional embodiment, the supporting and limiting part 102 has an arc-shaped structure, and the center of the supporting and limiting part 102 coincides with the axis of the corresponding battery unit 20. This configuration allows the supporting and limiting part 102 to adapt to the shape of the battery unit 20, avoiding the presence of sharp edges or points that could cause compression or wear to the battery unit 20.

[0122] like Figure 13 As shown, the support and engagement portion 230 includes a fixing plate 231, a first support plate 232, and a second support plate 233. The fixing plate 231 extends along a third direction and is located between two adjacent support and limiting portions 102. In the second direction, the first support plate 232 and the second support plate 233 are respectively disposed on both sides of the fixing plate 231. Both the first support plate 232 and the second support plate 233 have an arc-shaped surface on the side near the battery cell housing 100. The arc-shaped surface of the first support plate 232 and the arc-shaped surface of the second support plate 233 are respectively in contact with the adjacent support and limiting portions 102. The center of the arc-shaped surface of the first support plate 232 coincides with the axis of its adjacent support and limiting portion 102, and the center of the arc-shaped surface of the second support plate 233 coincides with the axis of its adjacent support and limiting portion 102. This design allows the support latching portion 230 to adapt to the shape of the support limiting portion 102, thus avoiding the presence of sharp edges or points that could cause compression or wear to the support limiting portion 102, which helps extend the service life of the battery cell housing 100.

[0123] For example, the support and locking portion 230 may include a plurality of first support plates 232 and a plurality of second support plates 233, and each first support plate 232 and each second support plate 233 may be spaced apart along a third direction. In this way, the support and locking effect of the support and locking portion 230 on the support and limiting portion 102 can be improved.

[0124] Optionally, at least two third support plates 240 may be provided on the side of the second end wall 201 facing the first end wall. In the second direction, at least one third support plate 240 may be provided at each of the two edges of the second end wall 201. The third support plates 240 are used to support and limit the supporting and limiting portions 102 at the two edges of the battery cell housing 100. For example, the side of the third support plate 240 near the battery cell housing 100 is provided with an arc-shaped surface. The arc-shaped surface of the third support plate 240 fits against the corresponding supporting and limiting portion 102, and the center of the arc-shaped surface of the third support plate 240 coincides with the axis of the corresponding supporting and limiting portion 102. This arrangement can improve the limiting and supporting effect on the battery cell housing 100.

[0125] In this embodiment, in the second direction, two third support plates 240 can be respectively provided at the two edges of the second end wall 201.

[0126] In optional embodiments, such as Figure 7 As shown, on the third-party side, at least two conductive connection portions 700 are provided on both sides of the battery unit housing 100 to facilitate the electrical connection between the battery unit 20 and the circuit board 600.

[0127] like Figure 4 As shown, the first end wall is provided with an air outlet 2200, which is used to communicate with the inner cavity of the tool housing of the power tool. In the first direction, the fluid through hole 212 penetrates the second end wall 201. In the third direction, the distance between the center line of the fluid through hole 212 and the side wall of the adjacent protective housing 200 is less than or equal to one-quarter of the width of the protective housing 200, so that the airflow entering through the fluid through hole 212 flows through the conductive connection part 700.

[0128] In this embodiment, the fluid through-hole 212 and the air outlet 2200 are arranged along a first direction, allowing airflow to pass through the arrangement space of the battery cells 20 along the first direction. The airflow path can cover the entire area of ​​the battery cells 20, which is beneficial for forming relatively uniform heat dissipation for all battery cells 20 and avoiding the problem of poor heat dissipation in some battery cells 20. This can effectively improve the heat dissipation effect of the battery device. At the same time, since the conductive connection part 700 is a current concentration area, it is prone to local overheating. The distance between the center line of the fluid through-hole 212 and the side wall of the adjacent protective shell 200 is less than or equal to one-quarter of the width of the protective shell 200. This makes it easier for the airflow entering from the fluid through-hole 212 to flow through the conductive connection part 700, which can effectively dissipate heat from the conductive connection part 700. This can further improve the heat dissipation effect of the battery device, thereby improving the working stability of the battery device and extending its service life.

[0129] For example, the air outlet 2200 may include a power slot 221, a signal slot 222 as described below, and other slots or openings provided on the first end wall.

[0130] In an optional embodiment, in the first direction, the orthographic projection of the conductive connection 700 covers at least a portion or all of the fluid through-hole 212. This arrangement allows the cooling airflow introduced by the fluid through-hole 212 to directly act on the surface of the conductive connection 700, effectively reducing the temperature rise of the conductive connection 700 and improving its heat dissipation effect.

[0131] In other embodiments, the orthographic projection of the conductive connection 700 in the first direction may not cover the fluid through-hole 212.

[0132] Optionally, the conductive connection 700 is located within the first gap 800, and both the fluid through-hole 212 and the air outlet 2200 are connected to the first gap 800. This arrangement, in the third direction, utilizes the dedicated first gap 800 formed between the protective housing 200 and the battery cell housing 100, and positions the conductive connection 700, where heat generation is most concentrated, within this first gap 800. Simultaneously, the fluid through-hole 212 and the air outlet 2200 are connected to the first gap 800, enabling directional, efficient, and uniform heat dissipation from the conductive connection 700, significantly reducing the risk of localized overheating and improving the safety of the battery device.

[0133] For example, in the first direction, the first gap 800 is disposed opposite to the fluid through-hole 212. This arrangement facilitates the direct and smooth flow of cooling airflow entering from the fluid through-hole 212 into the first gap 800, avoiding airflow deflection or bypassing, reducing wind resistance, and improving airflow utilization, thereby further enhancing the heat dissipation effect on the conductive connection 700 within the first gap 800. Of course, the first gap 800 and the fluid through-hole 212 may not be disposed opposite to each other. For example, the first gap 800 and the fluid through-hole 212 may be offset, such as the fluid through-hole 212 being disposed at the middle position of the second end wall 201.

[0134] In an optional embodiment, the second section 303 covers a portion of the fluid through-hole 212, and the hole 304 of the second section 303 extends along at least one wall surface penetrating the second section 303, such as... Figure 10 As shown, at least a portion of the holes 304 in the second section 303 are connected to the fluid through-hole 212 covered by the second section 303.

[0135] In this embodiment, the second section 303 partially covers the fluid passage 212, which can effectively improve the structural strength and impact resistance of the second end wall 201 where the fluid passage 212 is provided. Simultaneously, the connection between the second section 303 and the fluid passage 212 via the hole 304 ensures smooth air intake and liquid drainage through the fluid passage 212. Furthermore, because the opening direction of the hole 304 differs from that of the fluid passage 212, the air intake channel of the protective housing 200 forms a labyrinthine structure, causing the airflow to form a tortuous flow path, making it difficult for external debris to directly enter the interior of the protective housing 200, thus achieving a certain dustproof effect.

[0136] In other embodiments, the second section 303 may not cover the fluid through hole 212, and the hole 304 on the second section 303 may not be connected to the fluid through hole 212.

[0137] In optional embodiments, such as Figure 2 and Figure 9As shown, the battery casing 10 may further include at least two support structures 500. The support structures 500 are disposed on the side of the second end wall 201 facing away from the first end wall, i.e., the support structures 500 are located at the bottom of the protective casing 200. Furthermore, the support structures 500 are connected to the protective casing 200, and each support structure 500 is spaced apart along a second direction. Each support structure 500 extends along a third direction, crossing the centerline of the protective casing 200 in the third direction, and the sides of each support structure 500 facing away from the first end wall are located on the same plane.

[0138] This configuration, by replacing independent point-like protrusions with at least two support structures 500 extending along a third direction and spaced apart along a second direction on the second end wall 201, increases the stress-bearing area of ​​the support region. This effectively disperses the impact stress generated when the battery device is dropped, preventing concentrated impact from causing deformation or damage to the support structures 500, and improving the impact resistance and structural reliability of the support structures 500. The sides of each support structure 500 facing away from the power slot 221 are on the same plane, ensuring the battery device is placed stably. Since each support structure 500 extends along a third direction and crosses the centerline of the protective housing 200 in the third direction, compared to supporting the battery housing 10 with point-like protrusions, it effectively increases the support area, thereby increasing the stress-bearing area of ​​the support region of the battery housing 10. This effectively disperses the impact stress generated when the battery device is dropped, improving the impact resistance and structural reliability of the battery housing 10, thus enhancing the overall protective performance of the battery housing 10.

[0139] Optionally, at least one support structure 500 is located between the second section 303 of the first corner reinforcement structure 311 and the second section 303 of the second corner reinforcement structure 312, and the support structure 500 is connected to the second section 303 of the first corner reinforcement structure 311 and the second corner reinforcement structure 312 at both ends in the third direction. At least one support structure 500 is located between the second section 303 of the third corner reinforcement structure 321 and the second section 303 of the fourth corner reinforcement structure 322, and the support structure 500 is connected to the second section 303 of the third corner reinforcement structure 321 and the fourth corner reinforcement structure 322 at both ends in the third direction. This arrangement allows the support structure 500 and the reinforcement structure 300 to jointly form a frame structure, significantly improving the overall bending and torsional resistance of the second end wall 201 and effectively increasing the structural strength of the battery casing 10.

[0140] In optional embodiments, such as Figure 9As shown, each support structure 500 is provided with at least two channels 501, which are spaced apart along the second direction and extend along the third direction. This arrangement, on the one hand, reduces material usage and the overall weight of the battery casing 10 while ensuring the overall strength and rigidity of the support structure 500, achieving a lightweight design; on the other hand, the spaced channels 501 optimize the stress distribution of the support structure 500, preventing localized stress concentration and improving the structural stability of the battery casing 10 under impact. It also alters the impact load transmission path, allowing the impact force to diffuse more evenly across the support structure 500, and absorbs some of the impact energy, reducing the rigid transmission of the impact force to the protective casing 200 and minimizing the impact on the battery casing 10 and the internal battery cells 20.

[0141] In other embodiments, the support structures 500 may not have holes 501.

[0142] In an optional embodiment, each channel 501 is a triangular hole. In this embodiment, since triangles have a stable geometric structure, while reducing weight by opening holes, the structural rigidity and support strength of the support structure 500 itself can be guaranteed, making it less prone to local instability or damage; at the same time, the corner structure of the triangular hole can effectively disperse stress during impact, reduce stress concentration, thereby improving the impact resistance of the support structure 500 and ensuring the structural stability of the battery casing 10.

[0143] In other embodiments, the channel 501 may not be a triangular hole. For example, the channel 501 may be a round hole, a rectangular hole, or a hole of other shapes.

[0144] In an optional embodiment, at least two channels 501 include at least one first channel 5011 and at least one second channel 5012, with the first channel 5011 and the second channel 5012 alternately distributed along a second direction; the first channel 5011 and the second channel 5012 are arranged in a centrally symmetrical manner.

[0145] In this embodiment, the centrally symmetrical arrangement of the first and second channels 5011 and 5012 results in a difference in the force transmission direction between adjacent channels. When the support structure 500 is impacted, the impact force can be guided to different directions for dispersed transmission, avoiding the concentrated transmission of impact load along a single path. This allows for more effective dissipation of impact energy and reduces the impact on the protective shell 200. Simultaneously, the centrally symmetrical arrangement of the first and second channels 5011 and 5012 ensures a more balanced material and stiffness distribution in the support structure 500, preventing localized weakness due to a single opening method and improving the overall structural strength and stability of the support structure 500. Furthermore, the centrally symmetrical triangular holes can form a continuous rib structure, which strengthens the support structure 500, further enhancing its overall rigidity and reducing the likelihood of localized failure under drop impact conditions. This improves the protective effect of the battery shell 10 on the battery unit 20.

[0146] In other embodiments, the first channel 5011 and the second channel 5012 may not be centrally symmetrically arranged. For example, the first channel 5011 and the second channel 5012 may be arranged in the same direction.

[0147] Optionally, each channel 501 on the support structure 500 is connected to at least a portion of the holes 304 on the adjacent second section 303. This arrangement, where the channels 501 and corresponding holes 304 are interconnected to form a continuous structure, reduces material buildup and internal stress, lowers the probability of defects such as shrinkage marks and deformation during molding, improves the molding quality of the battery casing 10, and facilitates processing. The corresponding connection between the channels 501 of the support structure 500 and the holes 304 of the second section 303 makes the structural layout of the second section 303 and the support structure 500 more regular and unified, resulting in smoother force transmission, further optimizing the overall mechanical properties of the structure, and enhancing its impact and deformation resistance.

[0148] Of course, each channel 501 may not be connected to the hole 304.

[0149] In this embodiment, as Figure 2As shown, two support structures 500 can be provided on the side of the second end wall 201 opposite to the power slot 221. The two support structures 500 can be a first support structure 510 and a second support structure 520, respectively. The two ends of the first support structure 510 are connected to the first corner reinforcement structure 311 and the second corner reinforcement structure 312, and the two ends of the second support structure 520 are connected to the third corner reinforcement structure 321 and the fourth corner reinforcement structure 322. Furthermore, in the second direction, the first support structure 510 and the second support structure 520 can be symmetrical about the center line of the protective shell 200, which helps to center the center of gravity of the protective shell 200.

[0150] For example, a support structure 500 is provided on the side of each first wall portion 2011 facing away from the first end wall. Here, the side of each first wall portion 2011 facing away from the first end wall is located on the same plane. In this embodiment, the support structure 500 is respectively provided on two first wall portions 2011, and the two protruding first wall portions 2011 provide a reliable mounting base for the support structure 500, ensuring that the support height is consistent, making the battery device more stable and avoiding support failure due to inward sinking of the support position. The relatively concave design of the middle second wall portion 2012 can avoid a large area of ​​the bottom of the protective housing 200 contacting the mounting surface, reducing friction and scratches, while reserving a certain deformation space, so that it is not easy to directly squeeze and damage the internal components when subjected to impact, further improving the protective performance of the battery housing 10.

[0151] In some embodiments, at least two sets of fluid through-hole groups are provided on the second end wall 201, with each set of fluid through-hole groups spaced apart along a third direction, and each set of fluid through-hole groups including at least two fluid through-holes 212 spaced apart along a second direction. This arrangement can increase the air intake area, make the airflow distribution more uniform, and effectively improve the heat dissipation effect on the battery unit 20 and the conductive connection portion 700.

[0152] In this embodiment, two sets of fluid through holes may be provided on the second end wall 201. In the third direction, the two sets of fluid through holes may be provided close to both sides of the protective housing 200. In the first direction, the conductive connection portions 700 at the two ends of the battery unit 20 respectively cover part of the fluid through holes 212 of the two sets of fluid through holes, so that the cooling airflow can enter the protective housing 200 from the two sets of fluid through holes and dissipate heat to the conductive connection portions 700 at both ends of the battery unit 20.

[0153] In optional embodiments, such as Figure 14As shown, the fluid through-hole 212 is a strip-shaped hole that extends along a second direction. In this second direction, the length of the fluid through-hole 212 is greater than or equal to the diameter of the battery cell 20. This design significantly increases the air intake area, ensuring sufficient cooling airflow into the first gap 800 and improving the heat dissipation efficiency for the conductive connection 700 and the battery cell 20. Simultaneously, compared to a small round hole, the elongated fluid through-hole 212 provides a wider drainage path, making it less prone to clogging by impurities or condensate.

[0154] In other embodiments, the fluid through-hole 212 may not be a strip-shaped hole; for example, the fluid through-hole 212 may be a circular hole.

[0155] In optional embodiments, such as Figure 11 As shown, the battery cell housing 100 has at least two constraint limiting portions 101 on the side wall near the second housing portion 220. Each constraint limiting portion 101 is distributed along a second direction, and each constraint limiting portion 101 corresponds to a battery cell 20. Each constraint limiting portion 101 is used to accommodate at least a portion of the corresponding battery cell 20. In the second direction, the constraint limiting portion 101 and the corresponding battery cell 20 are mutually constrained. This arrangement can constrain the battery cell 20 in the second direction to prevent the battery cell 20 from shifting its position when subjected to vibration, impact, or compression, thus ensuring the stable arrangement of the battery cells 20. At the same time, it can also reduce the problems of pulling or poor contact of the electrical connectors of the battery cell 20 caused by relative movement between the battery cell 20 and the battery cell housing 100, which is beneficial to improving the working stability of the battery device.

[0156] like Figure 12 As shown, at least two locking portions 223 are provided on one of the battery cell housing 100 and the second housing portion 220, and at least two locking grooves 103 are provided on the other. The locking portions 223 are spaced apart along the second direction, and each locking portion 223 is correspondingly embedded in each locking groove 103. In the second direction, each locking portion 223 is limited and engaged with the groove wall of the corresponding locking groove 103. This arrangement can effectively limit the relative movement of the battery cell housing 100 and the protective housing 200 in the second direction, avoid misalignment or movement of the battery cell housing 100 and the protective housing 200, thereby preventing the internal battery cell 20 from shifting and short-circuiting, and improving the structural stability and safety of the battery device.

[0157] like Figure 11As shown, in the second direction, at least two engaging grooves 103 are respectively located on both sides of at least one constraint limiting portion 101. This arrangement serves two purposes: firstly, it forms a double-sided clamping limit on the constraint limiting portion 101, effectively improving the phase limiting effect between the battery cell housing 100 and the protective housing 200; secondly, since the engaging grooves 103 are located on both sides of the constraint limiting portion 101, the constraint engaging portion 223 is correspondingly arranged on both sides of the constraint limiting portion 101. When the protective housing 200 is subjected to external force, this structure can cut off the direct transmission path of the external load to the area of ​​the constraint limiting portion 101 near the second housing portion 220, thereby cutting off the direct transmission path of the impact load to the area of ​​the battery cell 20 near the second housing portion 220, preventing the area of ​​the battery cell 20 near the second housing portion 220 from directly bearing a large impact and causing deformation, compression, or short circuit.

[0158] When the protective housing 200 is impacted, the impact load will be preferentially transmitted through the contact area formed on both sides of the constraint limiting part 101 by the groove wall of the constraint engaging part 223 and the engaging groove 103, and dispersed to both sides of the battery unit 20. It is less likely to concentrate the force on the area of ​​the battery unit 20 near the second housing part 220. This can achieve load avoidance protection for the area of ​​the battery unit 20 near the second housing part 220, and effectively disperse the impact force along both sides of the battery unit 20, reduce local stress concentration, reduce the risk of internal short circuit caused by deformation of the battery unit 20 under stress, and significantly improve the structural stability and safety of the battery device under complex working conditions such as impact and extrusion.

[0159] Optionally, in the third direction, the locking part 223 is constrained and engaged with the groove wall of the locking groove 103. This arrangement can effectively limit the relative movement of the battery cell housing 100 and the protective housing 200 in the third direction, further preventing misalignment or movement of the battery cell housing 100 and the protective housing 200, thereby preventing the internal battery cell 20 from shifting and short-circuiting, and improving the structural stability and safety of the battery device.

[0160] In optional embodiments, such as Figure 12 As shown, in the second direction, two adjacent constraint engagement portions 223 are connected by a connecting portion 224. In this embodiment, two adjacent constraint engagement portions 223 are connected as a whole by the connecting portion 224, so that the dispersed engagement structure forms an integral structure, which can effectively improve the rigidity and deformation resistance of the constraint engagement portions 223, so that they are not prone to bending or breaking when subjected to external impact or compression; at the same time, when subjected to external force, the load can be transferred and dispersed between multiple constraint engagement portions 223 through the connecting portion 224, avoiding stress concentration in a single constraint engagement portion 223, which is beneficial to improving the overall impact and compression resistance of the battery housing 10 and extending the service life of the battery housing 10.

[0161] In other embodiments, two adjacent constraint engagement portions 223 may not be connected by the connecting portion 224.

[0162] In an optional embodiment, in the second direction, each constraint limiting part 101 has a locking groove 103 on both sides. This arrangement can form multiple limiting points in the second direction, making the fit between the battery cell housing 100 and the second housing part 220 more uniform, effectively avoiding local tilting, shaking, or unstable locking due to too few limiting points; at the same time, when subjected to external forces such as lateral impact or compression, the load can be distributed and transmitted through multiple locking grooves 103 and constraint locking parts 223, avoiding stress concentration in a few limiting parts, greatly reducing the risk of deformation, loosening, or even breakage of the locking structure, and improving the structural reliability of the battery housing 10 under complex working conditions.

[0163] Of course, there may be only two engagement slots 103. In one embodiment, the two engagement slots 103 may be located on both sides of one of the constraint limiting parts 101; in another embodiment, the two engagement slots 103 may be located on both sides of at least two constraint limiting parts 101, that is, there are at least two constraint limiting parts 101 between the two engagement slots 103.

[0164] like Figure 11 As shown, the constraint limiting part 101 has an arc-shaped structure, the second housing part 220 is provided with a constraint engaging part 223, the connecting part 224 is disposed opposite to the constraint limiting part 101, and the connecting part 224 is provided with an arc-shaped relief groove 2241 on the side of the constraint limiting part 101, and the center of each arc-shaped relief groove 2241 coincides with the center of the constraint limiting part 101.

[0165] In this embodiment, the arc-shaped constraint limiting part 101 can better fit the outer peripheral surface of the cylindrical battery unit 20, and can avoid the constraint limiting part 101 from causing squeezing damage to the battery unit 20; the arc-shaped relief groove 2241 can increase the relief space of the constraint limiting part 101, and prevent the connecting part 224 from squeezing or interfering with the constraint limiting part 101 during assembly and deformation under force.

[0166] In other embodiments, the arc-shaped clearance groove 2241 may not be provided on the side of the connecting portion 224 near the constraint limiting portion 101.

[0167] Optionally, a gap is provided between the wall of the arc-shaped clearance groove 2241 and the constraint limiting part 101. This arrangement can cut off the direct force path between the connecting part 224 and the battery cell housing 100, so that the external load can be preferentially transmitted through both sides of the constraint limiting part 101, which can effectively improve the protection effect of the battery cell 20.

[0168] Of course, no gap may be provided between the groove wall of the arc-shaped clearance groove 2241 and the constraint limiting part 101.

[0169] In an optional embodiment, at least two engaging structures are provided on one of the battery cell housing 100 and the second housing portion 220, such as... Figure 12 As shown, the engagement structures are spaced apart along the third direction. Each engagement structure includes at least two constraint engagement portions 223, and the constraint engagement portions 223 of the engagement structure are spaced apart along the second direction.

[0170] Each engagement groove 103 extends along a third direction, and each constraint engagement part 223 of each engagement structure is respectively embedded in each engagement groove 103.

[0171] In this embodiment, at least two engaging structures are arranged along a third direction, and each engaging structure includes at least two constraint engaging parts 223 arranged along a second direction, forming a matrix-type multi-point engaging system. This significantly increases the number of constraint points and the mating area between the battery unit housing 100 and the second housing part 220, significantly improves the overall structural rigidity of the assembled battery housing 10, and suppresses local deformation.

[0172] In other embodiments, either the battery cell housing 100 or the second housing portion 220 may be provided with only one engaging structure.

[0173] In optional embodiments, such as Figure 11 and Figure 12 As shown, one edge of the second housing portion 220 and the edge of the first housing portion 210 are provided with a snap-fit ​​groove 225, and the other edge is provided with a connecting protrusion 214. Both the snap-fit ​​groove 225 and the connecting protrusion 214 are arranged around the receiving space, and the connecting protrusion 214 engages with the snap-fit ​​groove 225. This arrangement, with the snap-fit ​​groove 225 and the connecting protrusion 214 surrounding the receiving space and engaging, forms a continuous and complete mating structure in the circumferential direction, making the connection between the second housing portion 220 and the first housing portion 210 more uniform and stronger in integrity, avoiding local loosening or gaps; at the same time, it significantly improves the overall rigidity of the protective housing 200, making it less prone to deformation under external pressure or impact, further ensuring the structural stability of the internal battery unit 20 and battery housing 10.

[0174] In other embodiments, the edges of the second housing portion 220 and the first housing portion 210 may not have the snap-fit ​​groove 225 and the connecting protrusion 214. For example, the second housing portion 220 and the first housing portion 210 are connected only by fasteners such as screws.

[0175] Optionally, the second housing portion 220 and the first housing portion 210 can also be connected by fasteners such as screws. This can further improve the connection stability between the second housing portion 220 and the first housing portion 210.

[0176] For example, the second housing portion 220 may be provided with a first mounting hole 213, and the second housing portion 220 may also be provided with a second mounting hole 226, with the first mounting hole 213 and the second mounting hole 226 being coaxially arranged; a screw can pass through the second mounting hole 226 and connect to the first mounting hole 213 to connect the second housing portion 220 and the first housing portion 210. In the second direction, at least one first mounting hole 213 is provided on each side of the second housing portion 220, and at least one second mounting hole 226 is provided on each side of the first housing portion 210.

[0177] In an optional embodiment, the battery device includes at least two battery cells 20, each battery cell 20 being disposed within a battery cell housing 100. The conductive connection portion 700 described above is electrically connected to the electrode portion 21 of each battery cell 20 in a one-to-one correspondence. Here, the conductive connection portion 700 facilitates the charging and discharging of the battery cells 20, for example, by outputting electrical energy from the battery cells 20 or charging the battery cells 20.

[0178] like Figure 16 As shown, in the third direction, sealing components 1800 are provided on both sides of the battery cell housing 100. The sealing component 1800 includes a sealing plate portion 1810 and a sealing ring portion 1820. The sealing plate portion 1810 is connected to the battery cell housing 100, and in the third direction, the orthographic projection of the sealing plate portion 1810 covers all conductive connection portions 700. The sealing ring portion 1820 is located between the sealing plate portion 1810 and the battery cell housing 100, and is sealed to both the sealing plate portion 1810 and the battery cell housing 100 respectively. The sealing ring portion 1820 is arranged around all conductive connection portions 700. The sealing component 1800 is an insulating structure.

[0179] This design effectively prevents external conductive solutions or substances from entering the area enclosed by the sealing ring 1820 and coming into contact with the conductive connection 700. This effectively prevents the conductive connection 700 from being corroded, improves the connection stability between the battery cell 20 and the circuit board 600, and effectively prevents the formation of a conductive path between the conductive connection 700 and adjacent conductive components, thereby reducing the risk of short circuits and improving the safety and reliability of the battery device.

[0180] In optional embodiments, such as Figure 16As shown, the sealing plate portion 1810 may include a fastening plate 1811 and a heat-conducting plate 1812. The fastening plate 1811 is connected to the battery cell housing 100, and the heat-conducting plate 1812 is located between the fastening plate 1811 and the battery cell housing 100. The heat-conducting plate 1812 is sealed to the sealing ring portion 1820. In the third direction, the orthographic projection of the heat-conducting plate 1812 covers all conductive connection portions 700.

[0181] In this embodiment, the fastening plate 1811 is connected to the battery cell housing 100, which can reliably fix the sealing assembly 1800. At the same time, the heat-conducting plate 1812 and the sealing ring 1820 are sealed together, which can not only seal and protect the conductive connection 700, but also quickly dissipate the heat generated by the conductive connection 700 during operation, avoid heat accumulation in the sealed area, and improve the heat dissipation effect of the conductive connection 700.

[0182] In other embodiments, the sealing plate portion 1810 may also exclude the heat-conducting plate 1812.

[0183] In optional embodiments, such as Figure 16 As shown, one of the fastening plate 1811 and the battery cell housing 100 is provided with a plurality of connecting protrusions 140, and the other is provided with a plurality of first connecting holes 18111. Each connecting protrusion 140 corresponds to each first connecting hole 18111, and each connecting protrusion 140 is spaced apart along the circumference of the sealing ring portion 1820. The heat-conducting plate 1812 is provided with a plurality of second connecting holes 18121. Each second connecting hole 18121 corresponds to each connecting protrusion 140, and each connecting protrusion 140 passes through the corresponding second connecting hole 18121 and connects to the first connecting hole 18111.

[0184] In this embodiment, the connecting protrusions 140 are arranged circumferentially around the sealing ring portion 1820. When the fastening plate 1811 is connected to the battery unit housing 100, the sealing ring portion 1820 is subjected to uniform force in the circumferential direction, avoiding poor sealing due to excessive or insufficient local force. This effectively improves the sealing and protection effect against conductive solutions and heat-conducting materials, further reducing the risk of corrosion and short circuit of the conductive connection portion 700. At the same time, the connecting protrusions pass through the second connecting hole 18121 of the heat-conducting plate 1812 and connect to the first connecting hole 18111, which simultaneously fixes the fastening plate 1811 and the heat-conducting plate 1812. This forms a stable overall structure with the fastening plate 1811, the heat-conducting plate 1812, and the battery unit housing 100. The sealing assembly 1800 is not easy to loosen when subjected to vibration or impact, ensuring the long-term effectiveness of the sealing structure. This is beneficial to improving the structural reliability of the battery device and extending its service life.

[0185] Furthermore, by connecting the protrusion 140 and the connection hole to connect the sealing assembly 1800 and the battery cell housing 100, space is reserved for the conductive lead 730 described below to pass through, thereby facilitating the electrical connection between the conductive lead 730 and the circuit board 600.

[0186] In other embodiments, neither the fastening plate 1811 nor the battery cell housing 100 may have the connecting protrusion 140 and the first connecting hole 18111. For example, the fastening plate 1811 and the battery cell housing 100 may be bonded together.

[0187] Optionally, such as Figure 16 As shown, the fastening plate 1811 can be provided with multiple heat dissipation holes 18112, each of which penetrates the fastening plate 1811 in a third direction. This arrangement can, on the one hand, reduce the weight of the fastening plate 1811, which is beneficial to the lightweighting of the battery device; on the other hand, it facilitates airflow through the heat-conducting plate 1812, thereby improving the heat dissipation effect of the battery device.

[0188] In optional embodiments, such as Figure 18 As shown, at least one of the battery cell housing 100 and the heat-conducting plate 1812 is provided with an annular limiting groove 150. The annular limiting groove 150 surrounds all conductive connection portions 700. A portion of the sealing ring portion 1820 is located within the annular limiting groove 150, and the sealing ring portion 1820 is in a limiting fit with the groove wall of the annular limiting groove 150. This arrangement can form a limiting constraint on the sealing ring portion 1820, effectively preventing the sealing ring portion 1820 from shifting, twisting, or falling out during assembly and use, ensuring that the sealing ring portion 1820 always remains in the preset sealing position, continuously and stably blocking the intrusion of external conductive solutions, conductive substances, etc., and significantly improving the reliability of the sealing structure.

[0189] Of course, the annular limiting groove 150 may not be provided on either the battery cell housing 100 or the heat conduction plate 1812.

[0190] In optional embodiments, such as Figure 18 As shown, the battery device also includes a circuit board 600, which is disposed outside the battery cell housing 100; as Figure 17As shown, on the third-party side, at least two conductive leads 730 are provided on both sides of the battery cell housing 100. Each conductive lead 730 includes a first lead 731 and a second lead 732 electrically connected to the first lead 731. The first lead 731 is electrically connected to at least one conductive connection 700, and the second lead 732 is electrically connected to the circuit board 600. The first lead 731 is located within the space enclosed by the sealing ring 1820, and the second lead 732 is located outside the sealing ring 1820. This arrangement allows for the electrical signal or energy output through the first lead 731's electrical connection to the conductive connection 700, while also effectively isolating the inner sealed area from the outer area where the circuit board 600 is located through the sealing ring 1820, ensuring the airtightness of the sealed area and preventing external conductive solutions, moisture, etc., from entering the interior along the conductive leads 730.

[0191] The second lead-out portion 732 is covered with an insulating seal 1900. This arrangement can seal the second lead-out portion 732 to prevent it from being corroded or short-circuited due to contact between conductive solutions or conductive substances and the second lead-out portion 732.

[0192] In other embodiments, the insulating seal 1900 may not be provided outside the second lead-out portion 732.

[0193] In optional embodiments, such as Figure 18 As shown, the battery cell housing 100 is provided with an annular limiting groove 150, and a portion of the sealing ring portion 1820 is located within the annular limiting groove 150. The conductive lead-out portion 730 also includes a bent lead-out portion 733, the two ends of which are electrically connected to the first lead-out portion 731 and the second lead-out portion 732, respectively, and the bent lead-out portion 733 is sandwiched between the sealing ring portion 1820 and the groove wall of the annular limiting groove 150, and the sealing ring portion 1820, the bent lead-out portion 733 and the groove wall of the annular limiting groove 150 are sealed together.

[0194] In this embodiment, the bent lead-out portion 733 is sandwiched between the sealing ring portion 1820 and the groove wall of the annular limiting groove 150. The compression deformation of the sealing ring portion 1820 and the bent lead-out portion 733 are used to tightly fit and seal the battery cell housing 100. There is no need to make a hole in the battery cell housing 100 for the conductive lead-out portion 730 to pass through, which eliminates the weak point of sealing caused by the hole. It effectively prevents external conductive solutions or conductive substances from entering the space enclosed by the sealing ring portion 1820 along the conductive lead-out portion 730, which can greatly improve the reliability of the seal.

[0195] In other embodiments, the conductive lead 730 may not include the bent lead 733. For example, the sealing ring portion 1820 may be provided with an opening for the conductive lead 730 to pass through, or the battery cell housing 100 may be provided with an opening for the conductive lead 730 to pass through.

[0196] In optional embodiments, such as Figure 21 As shown, a groove 130 is provided on the battery cell housing 100, and a portion of the second lead 732 is located in the groove 130; the insulating sealant 1900 includes a potting compound layer filled in the groove 130, and the potting compound layer covers the second lead 732.

[0197] In this embodiment, a portion of the second lead-out 732 is placed within the groove 130 and filled and encapsulated with a potting compound. This facilitates full encapsulation and insulation of the second lead-out 732, preventing it from contacting and conducting with the battery cell housing 100 or external conductive structures. This avoids risks such as short circuits and leakage, thus improving the electrical safety of the battery device. Furthermore, after the potting compound cures, it firmly bonds the second lead-out 732 to the groove wall of the groove 130. When the battery device is subjected to vibration or impact, this effectively prevents the second lead-out 732 from shaking or shifting, ensuring the stability of the electrical connection between the second lead-out 732 and the circuit board 600.

[0198] In other embodiments, the groove 130 may not be provided on the battery cell housing 100, and the insulating seal 1900 may not include the potting compound layer.

[0199] In an optional embodiment, from a third-party perspective, at least two through holes can be provided on each of the two side walls of the battery cell housing 100, and the electrode portion 21 of each battery cell 20 can correspond one-to-one with each through hole. This arrangement facilitates the electrical connection between the conductive connection portion 700 and the electrode portion 21.

[0200] like Figure 18 As shown, an annular seal 2000 is provided at the end of the battery cell 20. The annular seal 2000 surrounds the electrode 21 of the battery cell 20 and seals against the wall of the through hole. The annular seal 2000 also partially seals against the conductive connection 700. The annular seal 2000 is an insulating structure. This configuration forms a sealing barrier inside the battery cell 20, preventing conductive solutions and conductive substances from entering the connection point between the electrode 21 and the conductive connection 700 from inside the battery cell housing 100. It also creates electrical isolation around the electrode 21 and the conductive connection 700, preventing conductive solutions or conductive substances from forming a conductive path between the electrode 21 and the adjacent conductive structure, further reducing the risk of short circuit in the battery cell 20.

[0201] In this embodiment, the annular seal 2000, together with the outer sealing component 1800, can form a double seal, both internally and externally, which can further improve the sealing reliability and safety of the battery device.

[0202] In other embodiments, the annular seal 2000 may not be provided at the end of the battery cell 20.

[0203] Optionally, such as Figure 18 and Figure 19 As shown, the conductive connection portion 700 includes at least two conductive pieces 701, each of which is spaced apart and electrically connected to the electrode portion 21 of the battery cell 20. This arrangement allows for multi-contact conductivity between the conductive connection portion 700 and the electrode portion 21. Even if individual conductive pieces 701 experience contact fluctuations or damage, the remaining conductive pieces 701 can still maintain normal conductivity, significantly improving the stability and reliability of the electrical connection between the conductive connection portion 700 and the electrode portion 21. Furthermore, the spaced arrangement of multiple conductive pieces 701 effectively increases the heat dissipation surface area compared to a single solid conductive structure, enabling faster heat dissipation from the electrode portion 21 of the battery cell 20 and the conductive connection points, preventing heat accumulation, reducing temperature rise at the connection points, and improving the operating temperature environment of the battery cell 20.

[0204] Of course, the conductive connection part 700 may also include only one conductive piece 701.

[0205] In this embodiment, the conductive connection portion 700 electrically connected to the positive electrode portion 2101 of the battery unit 20 is the positive electrode connection portion 710, and the conductive connection portion 700 electrically connected to the negative electrode portion 2102 of the battery unit 20 is the negative electrode connection portion 720.

[0206] At least two conductive leads 730 may include a positive electrode edge lead 7301, a negative electrode edge lead 7302, and a middle lead. The first lead 731 of the middle lead may be electrically connected to the adjacent positive electrode connection 710 and negative electrode connection 720, respectively, so that the battery cells 20 are connected in series. For example, the middle lead is located on the third-direction side of the battery cell housing 100.

[0207] The battery device may include at least two sets of battery strings, each set of battery strings including at least two battery cells 20. The sets of battery strings are arranged along a first direction, and the battery cells 20 of each set of battery strings are arranged along a second direction. The battery cells 20 of each set of battery strings are connected in series.

[0208] For example, the conductive connection 700 connecting two adjacent battery cells 20 in each battery string can be electrically connected through the first lead-out portion 731 of the intermediate lead-out portion to realize the series connection of two adjacent battery cells 20 in each battery string. In the second direction, the positive electrode portion 2101 of one of the two battery cells 20 located at the edge of each battery string is electrically connected to the circuit board 600 through the positive electrode edge lead-out portion 7301, and the negative electrode portion 2102 of the other is electrically connected to the circuit board 600 through the negative electrode edge lead-out portion 7302.

[0209] Optionally, the battery cell housing 100 is provided with at least two recesses 130, and portions of the second leads 732 of each conductive lead 730 are respectively located within the respective recesses 130. Specifically, as shown... Figure 21 As shown, the battery cell housing 100 may be provided with a plurality of grooves 130. The plurality of grooves 130 may include a plurality of first grooves 131 and four second grooves 132. A portion of the second lead-out portion 732 of the middle lead-out portion is located in the first groove 131. A portion of the second lead-out portion 732 of the positive electrode edge lead-out portion 7301 and a portion of the second lead-out portion 732 of the negative electrode edge lead-out portion 7302 are respectively located in the corresponding second grooves 132.

[0210] For example, in order to improve the structural compactness of the battery device and reduce its volume, the four second grooves 132 can be distributed in pairs on the sidewalls of the battery cell housing 100 in the second direction to effectively utilize the space on both sides of the battery cell housing 100 in the second direction.

[0211] In this embodiment, each battery string includes five battery cells 20. Of course, the number of battery cells 20 in each battery string can be less than or greater than five. For example, the voltage of the battery cell 20 is 3.6V.

[0212] Based on the battery device provided in the embodiments of this application, the embodiments of this application also provide a power tool assembly, which may include a power tool and the battery device described in any of the above embodiments. The power tool is provided with a plug, which can be inserted into the power slot 221 of the battery device and can be selectively electrically connected to a set of power terminals 900 in the battery device.

[0213] The beneficial effects achieved by the power tool assembly provided in this application embodiment are consistent with the beneficial effects achieved by the battery device provided in this application embodiment, and will not be repeated here.

[0214] In an optional embodiment, the plug can be one of at least two preset plugs, each preset plug is provided with a connection terminal, and the connection terminal of each preset plug can be electrically connected to each power terminal 900 in a one-to-one correspondence, and the lengths of the connection terminals of each preset plug are different.

[0215] In this embodiment, the connection terminals of each preset plug have different lengths, which allows different preset plugs to be inserted and connected to the corresponding power terminals 900 one by one, realizing mechanical error-proof matching of voltage levels, automatically outputting the corresponding voltage, and avoiding damage to the equipment due to voltage mismatch; at the same time, it realizes single slot compatibility with multiple voltage plugs, improves the versatility of the battery device, and has a simple structure and reliable connection.

[0216] In other embodiments, the length of the connection terminals of each preset plug may also be the same. For example, the battery device may also include only one power terminal 900. The output voltage of the power terminal 900 can be changed by changing the conductive switching switch or switching circuit inside the battery device to achieve the switching of different output voltages.

[0217] In an optional embodiment, the power terminal 900 includes a positive power terminal 910 and a negative power terminal 920, and the connection terminal includes a positive connection terminal and a negative connection terminal. The positive connection terminal is electrically connected to the positive power terminal 910, and the negative connection terminal is electrically connected to the negative power terminal 920. The spacing between the positive and negative connection terminals of each plug is the same. This arrangement ensures that the positive and negative terminals of different plugs can be stably aligned with the corresponding positive power terminal 910 and negative power terminal 920 on the battery side, guaranteeing correct polarity and reliable electrical connection. At the same time, it achieves a unified interface specification, facilitating the sharing of the same power slot 221 by multiple voltage plugs, simplifying structural design, reducing costs, and preventing short circuits due to reverse polarity, thus improving safety.

[0218] In other embodiments, the spacing between the positive and negative terminals of different preset plugs is different. For example, each power slot 221 can be arranged along a third direction.

[0219] In some embodiments, such as Figure 1 As shown, the battery device may further include a locking mechanism 2100. The locking mechanism 2100 includes an operating member 2110, a latching member 2120 connected to the operating member 2110, and an elastic member for providing support to the operating member 2110. The latching member 2120 can engage with a locking groove of a power tool to lock the battery device to the power tool. The operating member 2110 can move the latching member 2120 to disengage it from the locking groove, thus disengaging the battery device from the power tool. Here, the elastic member can be a spring.

[0220] Optionally, such as Figure 1 As shown, in the third direction, guide rails 250 can be provided on both sides of the second housing 220. The guide rails 250 can extend along the second direction. The power tool can be provided with a sliding groove, which slides into contact with the guide rails 250 to facilitate smooth connection between the power tool and the battery device.

[0221] The power tool includes a tool housing, a slide groove located at the bottom of the tool housing, and an inner cavity. When the tool housing is connected to the battery device, the inner cavity of the tool housing communicates with the air outlet 2200. The cooling fan of the power tool drives cooling airflow from the fluid passage 212 into the protective housing 200, then through the air outlet 2200 into the inner cavity of the tool housing, and finally out through the exhaust port of the tool housing.

[0222] In some embodiments, two stepped grooves may be provided on the first end wall, each corresponding to a positive power slot 2211 and a negative power slot 2212, and located above the positive and negative power slots 2211 and 2212, respectively. Two stepped portions may be provided on the tool housing, each embedded in one of the stepped grooves. This arrangement prevents airflow from escaping through the gap between the power slot 221 and the tool housing and thus from entering the inner cavity of the tool housing, thereby improving the sealing performance of the connection between the tool housing and the first end wall.

[0223] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A battery device used in power tools, characterized in that, include: The battery housing (10) is provided with an electrical slot (221) for inserting a plug into a power tool. At least two battery cells (20) are disposed within the battery housing (10); At least two sets of power terminals (900), at least a portion of each set of power terminals (900) is disposed in the power slot (221) and can be electrically connected to the plug respectively, and each set of power terminals (900) is spaced apart along the insertion direction of the plug; Each group of power terminals (900) is electrically connected to a group of battery strings, and each group of battery strings includes battery cells (20). The number of battery cells (20) in each group of battery strings is different, so that each group of power terminals (900) outputs a voltage of a different level.

2. The battery device according to claim 1, characterized in that, Along the insertion direction of the plug, the voltage level output by the power terminal (900) increases sequentially.

3. The battery device according to claim 1, characterized in that, In the thickness direction of the battery device, the height of each group of power terminals (900) is the same, and the thickness direction of the battery device intersects with the insertion direction of the plug; A first insulating partition is provided between two adjacent sets of the power terminals (900). In the thickness direction of the battery device, the height of the first insulating partition is lower than the height of the power terminals (900) so that the connection terminal of the plug can pass over the first insulating partition and be electrically connected to the power terminals (900).

4. The battery device according to claim 3, characterized in that, The power terminal (900) includes a positive power terminal (910) and a negative power terminal (920), and the positive power terminal (910) and the negative power terminal (920) are spaced apart in the width direction of the power slot (221); The first insulating barrier includes a first barrier (1200) and a second barrier (1300). The first barrier (1200) is disposed between two adjacent positive power terminals (910), and the second barrier (1300) is disposed between two adjacent negative power terminals (920). The first partition (1200) includes at least two first partitions (1211), each of which is spaced apart along the insertion direction of the plug; The second partition (1300) includes at least two second partitions (1311), each of which is spaced apart along the insertion direction of the plug.

5. The battery device according to claim 1, characterized in that, The power terminal (900) includes a positive power terminal (910) and a negative power terminal (920), and the positive power terminal (910) and the negative power terminal (920) are spaced apart in the width direction of the power slot (221); A second insulating barrier (1100) is provided between the positive power terminal (910) and the negative power terminal (920).

6. The battery device according to claim 1, characterized in that, The battery housing (10) is also provided with a signal slot (222), and the battery device also includes a signal terminal (1000), at least a portion of which is located in the signal slot (222); In the width direction of the power slot (221), the power slot (221) and the signal slot (222) are spaced apart.

7. The battery device according to claim 6, characterized in that, A third insulating barrier (1400) is provided between the signal terminal (1000) and the power terminal (900).

8. A power tool assembly, characterized in that, The device includes a power tool and a battery device according to any one of claims 1-7, wherein the power tool is provided with a plug that can be inserted into the power slot (221) of the battery device and can be selectively electrically connected to a set of power terminals (900) in the battery device.

9. The power tool assembly according to claim 8, characterized in that, The plug is one of at least two preset plugs, each preset plug is provided with a connection terminal, and the connection terminal of each preset plug can be electrically connected to each power terminal (900) in a one-to-one correspondence, and the lengths of the connection terminals of each preset plug are different.

10. The power tool assembly according to claim 9, characterized in that, The power terminal (900) includes a positive power terminal (910) and a negative power terminal (920), and the connection terminal includes a positive connection terminal and a negative connection terminal. The positive connection terminal is electrically connected to the positive power terminal (910), and the negative connection terminal is electrically connected to the negative power terminal (920). The spacing between the positive and negative terminals of each of the preset plugs is the same.

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