Battery pack and charging system

Abstract

The utility model relates to battery pack technical field discloses a kind of battery pack, including battery pack shell, the electric core component being arranged in battery pack shell and multiple terminals electrically connected with electric core component, multiple insertion slots being arranged in battery pack shell are equipped on battery pack shell, terminal is arranged in insertion slot and exposes in insertion slot, battery pack further includes: the protection assembly being arranged in battery pack shell, protection assembly includes at least one protection sheet slidably arranged in battery pack shell, protection sheet is correspondingly arranged with insertion slot, when being in first state, protection sheet is stretched from battery pack shell and covers at least partial insertion slot, and protection sheet is located above terminal, terminal is shielded by protection sheet;When being in second state, protection sheet is stretched into battery pack shell under the action of external thrust to open insertion slot.The battery pack has good protection effect, prolongs the service life of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and charging system. Background Technology

[0002] In the field of modern portable power tools and appliances, removable battery packs are the mainstream power source, widely used in power tools such as chainsaws, drills, hammer drills, picks, angle grinders, wrenches, hair dryers, lawn mowers, lawnmowers, and electric shears, as well as electrical products such as lighting fixtures, audio equipment, and outdoor power supplies. Their working cycle relies on recharging after the battery is depleted.

[0003] However, in industrial and construction environments, cutting, grinding, and other operations generate a large amount of conductive contaminants such as metal shavings. When the battery pack is removed from the power tool or charger, its exposed charging and discharging terminals are highly susceptible to contamination, especially since users often place it carelessly on workbenches or in toolboxes with shavings, which greatly increases the risk.

[0004] These metal debris entering the interface can cause not only physical damage and poor contact, but also bridging the positive and negative terminals and causing external short circuits. More dangerously, some metal debris can penetrate the battery's interior, adhering to the battery management system's protection board or the battery cells, causing internal short circuits. Internal short circuits can trigger violent discharge and overheating, ultimately leading to thermal runaway, resulting in fires or explosions. Therefore, effectively preventing conductive debris from damaging the safety and functionality of the battery pack is a pressing technical problem that needs to be solved. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a battery pack and charging system that offers excellent protection and safety, and helps extend the battery pack's lifespan.

[0006] This utility model provides a battery pack, including a battery pack housing, a cell assembly disposed within the battery pack housing, and a plurality of terminals electrically connected to the cell assembly. The battery pack housing has a plurality of insertion slots disposed within and exposed to the insertion slots. The battery pack further includes a protective assembly disposed within the battery pack housing, the protective assembly including at least one protective plate slidably disposed within the battery pack housing, the protective plate being correspondingly disposed to the insertion slots. In a first state, the protective plate extends from within the battery pack housing and covers at least a portion of the insertion slots, and the protective plate is positioned above the terminals, which are blocked by the protective plate. In a second state, the protective plate extends into the battery pack housing under the action of an external force to open the insertion slots.

[0007] A further improvement is as follows: the battery pack housing includes an upper cover and a lower housing connected to each other, the battery cell assembly is disposed in the receiving space between the upper cover and the lower housing, the upper cover includes a protrusion at one end of the upper cover away from the lower housing, the protective sheet is slidably disposed inside the protrusion, and the insertion slot passes through the protrusion. A further improvement is as follows: the insertion slot includes a first opening, which is located on the side of the protrusion away from the lower housing; when in the first state, the protective plate extends out from the protrusion and covers at least part of the first opening, and the protective plate is located above the terminal, which is blocked by the protective plate; when in the second state, the protective plate extends into the protrusion under the action of an external force to open the first opening.

[0008] A further improvement is that the insertion slot further includes a second opening on the front sidewall of the protrusion, and the second opening communicates with the first opening to form an inverted L-shaped structure.

[0009] A further improvement is as follows: the protective assembly further includes at least one elastic element disposed inside the protrusion, the elastic element being disposed corresponding to the protective sheet, and one end of the protective sheet abutting against the elastic element; when in the first state, the protective sheet extends out from inside the protrusion under the elastic force of the elastic element and covers at least part of the first opening, and the protective sheet is located above the terminal, the terminal being blocked by the protective sheet; when in the second state, the protective sheet slides toward the protrusion and compresses the elastic element under the action of an external thrust, and the protective sheet opens the first opening.

[0010] A further improvement is as follows: the inner side of the protrusion is provided with a plurality of first limiting grooves communicating with the insertion groove and a plurality of second limiting grooves opposite to the first limiting grooves. A partition is provided between the first limiting grooves and the second limiting grooves. The elastic element is provided in the second limiting groove. The protective sheet is slidably provided in the first limiting groove and the second limiting groove through the partition.

[0011] A further improvement is as follows: the protective sheet includes a protective sheet body and a slider disposed at one end of the protective sheet body. The protective sheet body is disposed in the first limiting groove, and the end of the protective sheet body with the slider passes through the partition, so that the slider is slidably disposed in the second limiting groove and abuts against the elastic member. When in the first state, the protective sheet body extends out from the protrusion under the elastic force of the elastic member and covers at least part of the first opening, and the protective sheet body is located above the terminal, and the terminal is blocked by the protective sheet body. When in the second state, the protective sheet body causes the slider to slide toward the protrusion and compress the elastic member under the action of external thrust, and the protective sheet body opens the first opening.

[0012] A further improvement is that the protective component further includes a fixing plate and fasteners, the fixing plate covering the second limiting groove and being fixed to the protrusion by the fasteners.

[0013] A charging system includes a charging device and a battery pack, the charging device including a connector; in a second state, the battery pack is inserted into the connector, and a protective plate slides and extends into the battery pack housing under the abutment of the connector to open the connector slot.

[0014] A further improvement is as follows: the protective component further includes at least one elastic member disposed inside the protrusion, the elastic member being disposed correspondingly to the protective sheet, and one end of the protective sheet abutting against the elastic member; when in the first state, the battery pack is disengaged from the connector, the protective sheet extends out from the protrusion under the elastic force of the elastic member and covers at least part of the first opening, and the protective sheet is located above the terminal, the terminal being blocked by the protective sheet.

[0015] Compared with the prior art, the present invention has the following beneficial effects: by setting a protective plate, it not only does not affect the normal use of the battery pack, but also prevents metal debris from entering the interior by covering the plug slot when the battery pack is not in use, thus providing good protection, improving safety, and extending the service life of the battery pack; the protective plate moves automatically when plugged into or unplugged from electrical equipment such as chargers, without the need for manual operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention; Figure 2 This is a front view of a battery pack according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the connection between the battery pack and the socket of an electrical device according to an embodiment of the present invention; Figure 4 This is an exploded view of the structure of the top cover according to an embodiment of the present invention; Figure 5 This is a bottom view of the top cover according to an embodiment of the present utility model; Figure 6 This is a top view of an embodiment of the present invention where the top cover is not connected to the socket of an electrical device; Figure 7 This is a top view schematic diagram of the connection between the top cover and the plug socket of an electrical device according to an embodiment of the present invention; Figure 8 This is a bottom view of an embodiment of the present invention, showing the top cover (with the fixing plate removed) not connected to the socket of an electrical device. Figure 9 This is a bottom view schematic diagram showing the connection between the top cover (with the fixing plate removed) and the plug socket of an electrical device according to an embodiment of the present invention; Figure 10 This is a structural diagram of electrical equipment. Detailed Implementation

[0018] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0020] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar attributes, not to indicate or imply relative importance or a specific order.

[0022] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0023] Please refer to Figure 1 and Figure 10 This illustration shows a battery pack 100 provided in an embodiment of the present invention, used to connect to an electrical device 200. The electrical device 200 can be a power tool or garden tool powered by a motor, such as an electric drill, lawnmower, or hair dryer; it can also be an electrical device without a motor, such as a lamp, radio, or speaker. Alternatively, the electrical device 200 can also be a charging device that supplies power to the battery pack.

[0024] The electrical device 200 includes a connector 210 for plugging into the battery pack 100. The connector 210 has a metal piece 211 for electrical connection with the terminal 20. The electrical device 200 may also include a slide rail 220, through which the battery pack 100 can slide along a predetermined sliding direction, thereby being mounted on the electrical device 200. The electrical device 200 may also include a groove 230 for engaging or disengaging the battery pack 100. Figure 10 As shown, electrical equipment 200 is a charger.

[0025] like Figures 1-9As shown, a battery pack 100 includes a battery pack housing 10, a battery cell assembly disposed within the battery pack housing 10, and a plurality of terminals 20 electrically connected to the battery cell assembly. The battery pack housing 10 has a plurality of insertion slots 112 penetrating the battery pack housing 10. The terminals 20 are disposed within and exposed to the insertion slots 112. The battery pack 100 further includes a protective component 30 disposed within the battery pack housing 10. The protective component 30 includes at least one protective sheet 31 slidably disposed within the battery pack housing 10. The protective sheet 31 is correspondingly disposed with respect to the insertion slots 112. In a first state, the protective sheet 31 extends out of the battery pack housing 10 and covers at least a portion of the insertion slots 112, and the protective sheet 31 is located above the terminals 20, which are blocked by the protective sheet 31. In a second state, the protective sheet 31 extends into the battery pack housing 10 under the action of an external thrust to open the insertion slots 112.

[0026] Specifically, the insertion slot 112 is used to insert into the insertion socket 210 of the electrical device 200 so that the terminal 20 is electrically connected to the metal plate 211. In the first state, the battery pack 100 is in an unused state, and the protective plate 31 extends out from the battery pack housing 10 by sliding and covers at least part of the insertion slot 112, and the protective plate 31 is located above the terminal 20, which is blocked by the protective plate 31. In the second state, the battery pack 100 is in a used state, and the protective plate 31 slides and extends into the battery pack housing 10 under the action of external thrust (i.e., under the abutment of the insertion socket 210) to open the insertion slot 112. The insertion socket 210 is inserted into the insertion slot 112, and the terminal 20 is electrically connected to the metal plate 211. At this time, the battery pack 100 and the electrical device 200 are in a plugged-in state.

[0027] By setting the protective plate 31, not only is the normal use of the battery pack 100 not affected, but when the battery pack 100 is not in use, it also prevents metal debris from entering the battery pack by covering the plug slot 112, thus avoiding short circuits, fires, or explosions. It has a good protective effect, improves safety, and extends the service life of the battery pack.

[0028] like Figures 1-3As shown, in one embodiment, the battery pack housing 10 includes an upper cover 11 and a lower housing 12 connected to each other. The battery cell assembly is disposed in the receiving space between the upper cover 11 and the lower housing 12. The upper cover 11 includes a protrusion 111 disposed at one end of the upper cover 11 away from the lower housing 12. A protective sheet 31 is slidably disposed inside the protrusion 111, and a connector groove 112 passes through the protrusion 111. Specifically, in the first state, the protective sheet 31 extends out from the protrusion 111 by sliding and covers at least part of the connector groove 112, and the protective sheet 31 is located above the terminal 20, which is blocked by the protective sheet 31. In the second state, the protective sheet 31 slides and extends into the protrusion 111 under the action of an external thrust to open the connector groove 112.

[0029] Specifically, multiple insertion slots 112 are spaced apart and arranged side by side at the front end of the protrusion 111, and the insertion slots 112 penetrate the protrusion 111, facilitating the insertion of the insertion seat 210 into the insertion slots 112. The inner side of the protrusion 111 is the side of the protrusion 111 closest to the lower housing 12. A matching structure can be provided between the upper cover 11 and the lower housing 12 for splicing and positioning, and the two can be fixedly connected by screws. In this embodiment, the protrusion 111 is a boss.

[0030] like Figure 1 As shown, in one embodiment, the insertion slot 112 includes a first opening 113, which is located on the side of the protrusion 111 away from the lower housing 12. In a first state, a protective plate 31 extends from the protrusion 111 and covers at least part of the first opening 113, and the protective plate 31 is located above the terminal 20, which is blocked by the protective plate 31. In a second state, the protective plate 31 extends into the protrusion 111 under the action of an external force to open the first opening 113. Specifically, the first opening 113 is located on the top wall surface of the protrusion 111, that is, the first opening 113 penetrates the top wall of the protrusion 111.

[0031] Specifically, in the first state, the battery pack 100 is in an unused state, and the protective plate 31 extends out from the protrusion 111 by sliding and covers at least part of the first opening 113. The protective plate 31 is located above the terminal 20, and the terminal 20 is blocked by the protective plate 31. In the second state, the battery pack 100 is in a used state, and the protective plate 31 slides and extends into the protrusion 111 by the abutment of the plug 210, thereby opening the first opening 113 so that the terminal 20 is exposed to the first opening 113. The plug 210 can be inserted into the plug slot 112, and the terminal 20 is electrically connected to the metal plate 211. At this time, the battery pack 100 and the electrical equipment 200 are in a plugged-in state.

[0032] like Figure 1 and Figure 2As shown, in one embodiment, the insertion slot 112 further includes a second opening 114 provided on the front sidewall of the protrusion 111. The second opening 114 communicates with the first opening 113 to form an inverted L-shaped structure. The second opening 114 is used to allow the metal piece 211 on the insertion socket 210 of the electrical device 200 to be inserted into the insertion slot 112. Specifically, the second opening 114 is provided on the front sidewall surface of the protrusion 111, that is, the second opening 114 is provided through the front sidewall of the protrusion 111.

[0033] Specifically, in the first state, the battery pack 100 is in an unused state. The protective plate 31 extends out from the protrusion 111 by sliding and at least partially or completely covers the first opening 113. The protective plate 31 is located above the terminal 20, and the terminal 20 is blocked by the protective plate 31. In the second state, the battery pack 100 is in a used state. The metal plate 211 on the plug 210 is inserted from the second opening 114. The protective plate 31 slides and extends into the protrusion 111 due to the abutment of the metal plate 211, thereby opening the first opening 113 so that the terminal 20 is exposed to the first opening 113, so that the terminal 20 is electrically connected to the metal plate 211. At this time, the battery pack 100 and the electrical device 200 are in a plugged-in state.

[0034] Specifically, the protective sheet 31 is elongated to fit the first opening 113. The terminal 20 is a metal component, and the protective sheet 31 covers the terminal 20, effectively preventing it from being contaminated by metal debris and thus protecting it. It should be noted that the battery pack 100 can be configured with different types and numbers of terminals 20 depending on its model. For example, the terminal 20 can include positive terminals, negative terminals, signal terminals, etc. In this embodiment, there are four insertion slots 112, three of which contain terminals 20, and the other slot is empty. Each of the four insertion slots 112 has a corresponding protective sheet 31, and the corresponding insertion socket 210 also has three metal plates 211. Furthermore, the color of the protective sheet 31 can be different from the color of the protrusion 111, allowing the user to easily identify its operating status and confirm whether the battery pack's charging interface is effectively protected.

[0035] like Figure 4 and Figures 8-9As shown, in one embodiment, the protective component 30 further includes at least one elastic member 32 disposed inside the protrusion 111. The elastic member 32 is disposed corresponding to the protective sheet 31. One end of the protective sheet 31 abuts against the elastic member 32. When in the first state, the protective sheet 31 extends out of the protrusion 111 under the elastic force of the elastic member 32 and covers at least part of the first opening 113 (that is, the elastic member 32 pushes the protective sheet 31 to slide by the elastic force, so that the protective sheet 31 extends out of the protrusion 111 to the first opening 113, so that the protective sheet 31 at least partially or completely covers the first opening 113), and the protective sheet 31 is located above the terminal 20, and the terminal 20 is blocked by the protective sheet 31. When in the second state, the protective sheet 31 slides toward the protrusion 111 and compresses the elastic member 32 under the action of external thrust (that is, under the abutment of the metal sheet 211), and the protective sheet 31 opens the first opening 113.

[0036] Specifically, the number of elastic elements 32 is the same as that of the protective sheet 31. In this embodiment, the elastic element 32 is a spring, and four springs are also provided. The combination of the elastic element 32 and the protective sheet 31 achieves automatic protection of the terminal 20, improving overall efficiency and safety.

[0037] like Figure 4 and Figures 8-9 As shown, in one embodiment, the inner side of the protrusion 111 is provided with a plurality of first limiting grooves 115 communicating with the insertion groove 112 and a plurality of second limiting grooves 116 opposite to the first limiting grooves 115. A partition 117 is provided between the first limiting grooves 115 and the second limiting grooves 116. An elastic member 32 is provided in the second limiting groove 116. A protective sheet 31 is slidably provided in the first limiting groove 115 and the second limiting groove 116 through the partition 117.

[0038] Specifically, the protective sheet 31 is limited on both sides by the openings and walls of the first limiting groove 115 and the second limiting groove 116, which helps to improve the overall stability. One end of the elastic member 32 abuts against the wall of the second limiting groove 116 away from the first limiting groove 115, and the other end abuts against the protective sheet 31. In this embodiment, there are four of each of the first limiting groove 115 and the second limiting groove 116.

[0039] When the battery pack 100 is connected to the electrical device 200, the connector 210 of the electrical device 200 abuts against the front end of the protrusion 111. The metal piece 211 on the connector 210 is inserted into the connector slot 112 through the second opening 114 and pushes the protective piece 31 to slide toward the inside of the protrusion 111, so that the elastic member 32 is compressed. At the same time, the first opening 113 is opened and the terminal 20 is exposed. The metal piece 211 is inserted into the terminal 20 to form an electrical connection. At this time, it is in the second state. When the battery pack 100 is pulled out from the electrical device 200, the connector 210 and the front end of the protrusion 111 gradually move away from each other. The metal piece 211 follows and moves backward, so that the protective piece 31 slides under the elastic force of the elastic member 32 and extends toward the first opening 113 and gradually covers the first opening 113. When the connector 210 is completely separated from the protrusion 111, the protective piece 31 at least partially or completely covers the first opening 113, so that the terminal 20 is shielded and protected. At this time, it is in the first state. The battery pack 100 only exposes the terminals 20 when it is plugged into the electrical equipment 200. However, at this time, the terminals 20 are covered by the electrical equipment 200, making it safer. This not only facilitates the normal functioning of the battery pack 100 but also protects the terminals 20 and the internal structure of the battery pack 100, extending the battery pack's lifespan.

[0040] like Figure 4 and Figures 8-9 As shown, in one embodiment, the protective sheet 31 includes a protective sheet body 311 and a slider 312 disposed at one end of the protective sheet body 311. The protective sheet body 311 is disposed in the first limiting groove 115. The end of the protective sheet body 311 with the slider 312 passes through the partition 117, so that the slider 312 is slidably disposed in the second limiting groove 116 and abuts against the elastic member 32. When in the first state, the protective sheet body 311 extends out from the protrusion 111 under the elastic force of the elastic member 32 and covers at least part of the first opening 113. The protective sheet body 311 is located above the terminal 20, and the terminal 20 is blocked by the protective sheet body 311. When in the second state, the protective sheet body 311 causes the slider 312 to slide toward the protrusion 111 and compress the elastic member 32 under the action of external thrust, and the protective sheet body 311 opens the first opening 113.

[0041] Specifically, in the first state, the slider 312 slides under the elastic force of the elastic member 32, thereby causing the protective sheet 311 to slide and extend out from the protrusion 111, so that the protective sheet 311 at least partially or completely covers the first opening 113, and the protective sheet 311 is located above the terminal 20, and the terminal 20 is blocked by the protective sheet 311; in the second state, the protective sheet 311 causes the slider 312 to slide toward the protrusion 111 and compress the elastic member 32 under the abutment of the metal sheet 211, at which time the protective sheet 311 opens the first opening 113.

[0042] Specifically, the slider 312 and the protective plate 311 are integrally connected. One end of the elastic member 32 abuts against the groove wall of the second limiting groove 116 away from the first limiting groove 115, and the other end abuts against the slider 312. The protective plate 311 is a rectangular plate structure to adapt to the first opening 113.

[0043] like Figures 4-5 As shown, in one embodiment, the protective component 30 further includes a fixing plate 33 and a fastener 34. The fixing plate 33 covers the second limiting groove 116 and is fixed to the inner side of the protrusion 111 by the fastener 34. The fixing plate 33 limits the slider 312 within the second limiting groove 116, so that the bottom of the slider 312 is limited by the fixing plate 33 and the top of the slider 312 is limited by the inner wall of the protrusion 111, thereby preventing the entire protective plate 31 from shaking and improving overall stability. The fastener 34 is a screw. The fixing plate has two arrangement methods: the first is to set multiple fixing plates, each fixing plate corresponding to each second limiting groove 116 and connected to the inner side of the protrusion 111 by screws; the second is to select a large-area fixing plate, which can cover multiple second limiting grooves 116 at the same time and is connected to the inner side of the protrusion 111 by screws. By simultaneously covering the four second limiting grooves 116 with a large fixed plate, the four elastic elements 32 and the four sliders 312 are limited, which not only simplifies the structure but also helps to improve the overall stability.

[0044] like Figure 1-3 As shown, in one embodiment, the upper cover 11 further includes a slide groove 118 for slidingly connecting with the slide rail 220 of the electrical device 200, and the slide groove 118 is provided on both sides of the protrusion 111. By cooperating with the slide rail 220 of the electrical device 200 through the slide groove 118, the battery pack 100 can be slidably inserted into the electrical device 200, which improves convenience.

[0045] like Figure 3 and Figures 6-7 As shown, in one embodiment, the battery pack 100 further includes a locking assembly 40, which includes a button 41 disposed at one end of the protrusion 111 away from the insertion slot 112 and a retractable engaging member 42 disposed on the protrusion 111. The button 41 is connected to the engaging member 42 and is used to drive the engaging member 42 to perform a retractable movement so that the engaging member 42 is detachably connected to the electrical device 200.

[0046] Specifically, button 41 is located at the rear end of protrusion 111, and engaging member 42 is located at the rear end of protrusion 111. Pressing button 41 drives engaging member 42 to retract into protrusion 111, and releasing button 41 drives engaging member 42 to return to its original position and protrude from protrusion 111. Electrical device 200 has a groove 230, and engaging member 42 cooperates with groove 230 to engage or disengage battery pack 100 from electrical device 200. When it is necessary to remove battery pack 100 from electrical device 200, pressing button 41 causes engaging member 42 to retract into protrusion 111, and then the battery pack 100 is pulled out along a predetermined sliding direction via slide rail 220, further improving overall stability and convenience.

[0047] An embodiment of this utility model also provides a charging system, including a charging device and the aforementioned battery pack 100. The charging device includes a connector 210. When in the second state, the battery pack 100 is inserted into the connector 210, and the protective plate 31 slides and extends into the battery pack housing 10 under the abutment of the connector 210 to open the connector slot 112. Further, the protective component 30 also includes at least one elastic member 32 disposed inside the protrusion 111, the elastic member 32 corresponding to the protective plate 31, and one end of the protective plate 31 abutting against the elastic member 32. When in the first state, the battery pack 100 is disengaged from the connector 210, and the protective plate 31 extends from the protrusion 111 under the elastic force of the elastic member 32, covering at least a portion of the first opening 113. The protective plate 31 is located above the terminal 20, which is blocked by the protective plate 31. The protective plate moves automatically when the battery pack is inserted into or disconnected from electrical equipment such as a charger, eliminating the need for manual intervention and ensuring safety and convenience.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A battery pack, comprising a battery pack housing, a cell assembly disposed within the battery pack housing, and a plurality of terminals electrically connected to the cell assembly, wherein the battery pack housing has a plurality of insertion slots disposed within the battery pack housing, and the terminals are disposed within and exposed in the insertion slots, characterized in that, The battery pack further includes: a protective assembly disposed on the battery pack housing, the protective assembly including at least one protective sheet slidably disposed within the battery pack housing, the protective sheet being disposed corresponding to the insertion slot; in a first state, the protective sheet extends out from the battery pack housing and covers at least a portion of the insertion slot, and the protective sheet is located above the terminal, the terminal being blocked by the protective sheet; in a second state, the protective sheet extends into the battery pack housing under the action of an external thrust to open the insertion slot.

2. The battery pack according to claim 1, characterized in that, The battery pack housing includes an upper cover and a lower housing connected to each other. The battery cell assembly is disposed in the receiving space between the upper cover and the lower housing. The upper cover includes a protrusion at one end of the upper cover away from the lower housing. The protective sheet is slidably disposed inside the protrusion. The insertion groove passes through the protrusion.

3. The battery pack according to claim 2, characterized in that, The insertion slot includes a first opening, which is located on the side of the protrusion away from the lower housing. When in the first state, the protective plate extends from the protrusion and covers at least part of the first opening, and the protective plate is located above the terminal, which is shielded by the protective plate. When in the second state, the protective plate extends into the protrusion under the action of external thrust to open the first opening.

4. The battery pack according to claim 3, characterized in that, The insertion slot also includes a second opening on the front sidewall of the protrusion, the second opening communicating with the first opening to form an inverted L-shaped structure.

5. The battery pack according to claim 3, characterized in that, The protective assembly further includes at least one elastic element disposed inside the protrusion, the elastic element being disposed corresponding to the protective sheet, and one end of the protective sheet abutting against the elastic element; when in the first state, the protective sheet extends out from the protrusion under the elastic force of the elastic element and covers at least part of the first opening, and the protective sheet is located above the terminal, and the terminal is blocked by the protective sheet; When in the second state, the protective sheet slides toward the protrusion and compresses the elastic member under the action of external thrust, and the protective sheet opens the first opening.

6. The battery pack according to claim 5, characterized in that, The inner side of the protrusion is provided with a plurality of first limiting grooves communicating with the insertion groove and a plurality of second limiting grooves opposite to the first limiting grooves. A partition is provided between the first limiting grooves and the second limiting grooves. The elastic element is provided in the second limiting groove. The protective sheet is slidably provided in the first limiting groove and the second limiting groove through the partition.

7. The battery pack according to claim 6, characterized in that, The protective sheet includes a protective sheet body and a slider disposed at one end of the protective sheet body. The protective sheet body is disposed in the first limiting groove, and the end of the protective sheet body with the slider passes through the partition, so that the slider is slidably disposed in the second limiting groove and abuts against the elastic member. When in the first state, the protective sheet body extends out from the protrusion under the elastic force of the elastic member and covers at least part of the first opening, and the protective sheet body is located above the terminal, and the terminal is blocked by the protective sheet body. When in the second state, the protective sheet is pushed by an external force, causing the slider to slide toward the protrusion and compress the elastic element, and the protective sheet opens the first opening.

8. The battery pack according to claim 7, characterized in that, The protective assembly further includes a fixing plate and fasteners, the fixing plate covering the second limiting groove and being fixed to the protrusion by the fasteners.

9. A charging system, characterized in that, The device includes a charging device and a battery pack as described in any one of claims 1-8, wherein the charging device includes a connector; when in a second state, the battery pack is inserted into the connector, and the protective plate slides and extends into the battery pack housing under the abutment of the connector to open the connector slot.

10. The charging system according to claim 9, characterized in that, The protective assembly further includes at least one elastic member disposed inside the protrusion, the elastic member being disposed corresponding to the protective sheet, and one end of the protective sheet abutting against the elastic member; when in the first state, the battery pack is disengaged from the connector, the protective sheet extends out from the protrusion under the elastic force of the elastic member and covers at least part of the first opening, and the protective sheet is located above the terminal, the terminal being blocked by the protective sheet.

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