Battery shell structure and detachable battery

Abstract

The utility model relates to a battery shell structure and a detachable battery, and relates to the technical field of batteries. The battery shell structure comprises a protective shell and a connecting assembly, the connecting assembly comprises a connecting buckle and an elastic piece, a fixing base is arranged in the protective shell and connected with the protective shell, and the elastic piece is arranged on the fixing base and abuts against the connecting buckle. The elastic piece is arranged between the fixing base and the connecting buckle, is installed and fixed through the fixing base and forms a whole with the whole protective shell, and therefore the locking effect of the connecting buckle is guaranteed. And the connecting buckles and the protective shell are mutually independent, so that production and assembly are facilitated, and the whole shell structure can be conveniently maintained by replacing the connecting buckles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery shell structure and detachable battery. BACKGROUND

[0002] The battery device is an important accessory of the electric tool, which provides energy for the battery. The battery device mainly comprises a battery body, a battery box sleeved outside one or more battery bodies, and a wire for leading out the battery energy.

[0003] The existing electric tool is usually integrated with the battery structure, the battery cannot be detached or replaced, the battery charging is more troublesome, and the subsequent replacement and maintenance of the battery are difficult to operate. CONTENT

[0004] The purpose of the embodiment of the present application is to provide a battery shell structure and detachable battery to solve the above technical problems.

[0005] In a first aspect, the utility model provides a battery shell structure, which comprises a protective shell and a connecting assembly, the connecting assembly comprises a connecting buckle and an elastic piece, the protective shell is provided with a connecting protrusion, the connecting buckle is arranged at one end of the connecting protrusion, the connecting buckle has a locking position for clamping with the electric tool and an unlocking position for separating from the electric tool, the connecting buckle is driven to switch between the locking position and the unlocking position, the inside of the protective shell is provided with a fixing seat, the fixing seat is arranged at intervals with the connecting buckle, the elastic piece is arranged on the fixing seat, and the elastic piece provides elastic force to reset the connecting buckle to the locking position.

[0006] Optionally, the connecting protrusion is provided with sliding clamping grooves on both sides, and the sliding clamping grooves can be clamped with the limiting protrusions on the electric tool.

[0007] Optionally, each sliding clamping groove comprises a first clamping groove part and a second clamping groove part arranged in sequence in the insertion direction, and the width of the first clamping groove part is greater than that of the second clamping groove part.

[0008] Optionally, the length of the first clamping groove part in the insertion direction is L1, the length of the second clamping groove part in the insertion direction is L2, and the distance between the two sliding clamping grooves on both sides of the connecting protrusion is L3, then 27mm≤L1≤30mm, 22mm≤L2≤25mm, and 48mm≤L3≤51mm.

[0009] Optionally, the connecting buckle comprises a mounting part, a button part and a clamping part, the mounting part is in sliding connection with the protective shell, a through hole is formed in the protective shell, and the button part and the clamping part extend to the outside of the protective shell through the through hole.

[0010] Optionally, the inner side wall of the protective shell is provided with a mounting groove, the mounting part is slidingly arranged in the mounting groove, when the connecting buckle is in the locked position, the mounting part extends to the length L4 of the mounting groove, the protective shell has a first mounting surface and a second mounting surface arranged oppositely, the connecting buckle is arranged between the first mounting surface and the second mounting surface, the distance between the first mounting surface and the second mounting surface is L5, and L4 = 0.1 ± 0.05 * L5.

[0011] Optionally, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are detachably connected, and the connecting part between the upper shell and the lower shell is provided with a sealing assembly.

[0012] Optionally, the upper shell and / or the lower shell is provided with a buffer protection piece.

[0013] In another aspect, the utility model further provides a detachable battery, which comprises a battery pack, a control circuit board and the battery shell structure of any one of the above, the battery pack and the control circuit board are arranged in the interior of the battery shell structure, and the control circuit board is electrically connected with the battery pack.

[0014] Optionally, the detachable battery further comprises an electric quantity display assembly, the electric quantity display assembly comprises a light guide column, an indicating lamp and a control button, the indicating lamp is arranged on the control circuit board, the light entrance surface of the light guide column corresponds to the position of the indicating lamp, the control button is arranged on one side of the protective shell of the battery shell structure, and the control button is electrically connected with the control circuit board.

[0015] The utility model provides a battery shell structure, the interior of the protective shell is provided with a fixing seat, the fixing seat is connected with the protective shell, an elastic piece is arranged on the fixing seat, and the elastic piece abuts against the connecting buckle. The elastic piece is arranged between the fixing seat and the connecting buckle, is fixed through the fixing seat and forms an entirety with the whole protective shell, so as to guarantee the locking effect of the connecting buckle. The connecting buckle and the protective shell are independent of each other, which is convenient for production and assembly, and also facilitates maintenance of the whole shell structure by replacing the connecting buckle. The detachable connection with the electric tool is realized through the setting connecting assembly, the battery is convenient to replace, and the dismounting is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The explosion view of the battery shell structure provided by the embodiments of the present application is shown in the figure.

[0018] Figure 2 A perspective view of a battery housing structure provided by an embodiment of the present application;

[0019] Figure 3 A cross-sectional view of a battery housing structure provided by an embodiment of the present application;

[0020] Figure 4 A perspective view of a battery housing structure provided by an embodiment of the present application; Figure 3 An enlarged view of region A in the middle;

[0021] Figure 5 A perspective view of a connecting buckle in a battery housing structure provided by an embodiment of the present application;

[0022] Figure 6 An exploded view of a detachable battery provided by an embodiment of the present application;

[0023] Figure 7 A side view of a battery housing structure provided by an embodiment of the present application;

[0024] Figure 8 A cross-sectional view of a battery housing structure provided by an embodiment of the present application;

[0025] Figure 9 A side view of a battery housing structure provided by an embodiment of the present application;

[0026] Icon: 100 - protective housing; 101 - upper housing; 102 - lower housing; 200 - connecting assembly; 201 - connecting buckle; 202 - elastic member; 103 - connecting protrusion; 300 - fixing seat; 104 - sliding clamping groove; 2011 - mounting portion; 2012 - button portion; 2013 - clamping portion; 105 - mounting groove; 400 - battery pack; 500 - control circuit board; 600 - light guide column; 700 - indicator light; 800 - control button; 900 - buffer protection member. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] In the description of the present application, it should be noted that the terms "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The embodiment provides a battery shell structure, which comprises a protective shell 100 and a connecting assembly 200, the connecting assembly 200 comprises a connecting buckle 201 and an elastic piece 202, the protective shell 100 is provided with a connecting protrusion 103, the connecting buckle 201 is arranged at one end of the connecting protrusion 103, the connecting buckle 201 has a locking position for clamping the electric tool and an unlocking position for separating from the electric tool, the connecting buckle 201 is driven to switch between the locking position and the unlocking position, the protective shell 100 is internally provided with a fixing seat 300, the fixing seat 300 is arranged in a spaced manner with the connecting buckle 201, the elastic piece 202 is arranged on the fixing seat 300, and the elastic piece 202 provides elastic force to reset the connecting buckle 201 to the locking position.

[0031] Please refer to Figure 1 , as shown, Figure 1The battery shell structure provided by the embodiment of the application is a hollow box structure in the embodiment, and the inside of the protection shell 100 is used for placing a battery pack 400 and connecting wires and other components. The upper surface of the protection shell 100 is provided with a connecting protrusion 103 protruding from the surface of the protection shell 100, and the connecting protrusion 103 can be connected with a fixing groove of an external power tool, so as to ensure the stability of the battery shell structure after being connected with the power tool. The mounting protrusion is provided with a connecting buckle 201, and the connecting buckle 201 is clamped with a clamping groove on the power tool, so as to connect the power battery shell structure and the power tool together, and avoid the battery from falling off in the use process. It can be understood that the power tool will generate a large vibration in the use process, which is easy to cause the battery to loosen and fall off. The connecting buckle 201 is arranged to be locked, so as to ensure the stability of the battery after being mounted. The clamping buckle is connected with the protection shell 100, and the connecting buckle 201 can be switched between the locking position and the unlocking position by sliding the connecting buckle 201. When the battery and the power tool are mounted, the connecting buckle 201 is switched to the locking position, so as to improve the stability. When the battery needs to be disassembled, the connecting buckle 201 is switched to the unlocking position interface, so as to be convenient and fast. In order to ensure the stability of the connecting buckle 201 after being locked, the connecting buckle 201 is provided with an elastic element 202 at the connection position of the protection shell 100. The elastic element 202 provides an elastic force, so that the connecting buckle 201 always has a tendency to reset to the locking position, so as to ensure that the connecting buckle 201 will not fall off due to vibration and other external factors. The inside of the protection shell 100 is provided with a fixing seat 300, and the fixing seat 300 is connected with the protection shell 100. The elastic element 202 is arranged on the fixing seat 300, and the elastic element 202 abuts against the connecting buckle 201. The elastic element 202 is arranged between the fixing seat 300 and the connecting buckle 201, is mounted and fixed by the fixing seat 300, and forms an integral whole with the entire protection shell 100, so as to ensure the locking effect of the connecting buckle 201. The connecting buckle 201 and the protection shell 100 are independent of each other, which is convenient for production and assembly, and also facilitates maintenance of the entire shell structure by replacing the connecting buckle 201.

[0032] It should be noted that in some possible embodiments, the elastic element 202 can be a spiral spring or an elastic sheet or other elastic structure, which can provide an elastic force to reset the connecting buckle 201, and the specific material and structure are not limited.

[0033] Optionally, in some possible embodiments, the two sides of the connecting protrusion 103 are provided with sliding clamping grooves 104, and the sliding clamping grooves 104 can be clamped with limiting protrusions on the power tool.

[0034] Please refer to Figure 2As shown, the connecting protrusion 103 is in a long strip structure, and the two sides of the connecting protrusion 103 are provided with sliding clamping grooves 104, so that the point section of the entire connecting protrusion 103 forms a T-shaped sliding mounting structure. The entire battery shell structure can be clamped with the power tool in a sliding manner. When sliding to the specified position, the connecting buckle 201 is clamped with the clamping groove on the power tool. At this time, the battery shell structure is locked with the power tool, so that the battery can be kept stable during use of the power tool, and falling off is avoided. The sliding clamping groove 104 cooperates with the connecting protrusion 103 to limit from multiple directions, so that the protective shell 100 is prevented from shaking during use.

[0035] Optionally, in some possible embodiments, each sliding clamping groove 104 includes at least a first clamping groove portion and a second clamping groove portion arranged in sequence in the insertion direction, and the width of the first clamping groove portion is greater than the width of the second clamping groove portion.

[0036] Please refer to Figure 7 As shown, one side of the sliding clamping groove 104 forms an opening, and the limiting protrusion on the power tool is clamped in the sliding clamping groove 104 from the clamping position of the sliding clamping groove 104 during installation, so as to complete the installation operation of the battery and the power tool. The sliding clamping groove 104 is divided into a first clamping groove portion and a second clamping groove portion along the insertion direction of the limiting protrusion, and the width of the first clamping groove portion near the opening side is greater than the width of the second clamping groove portion. On the one hand, the first clamping groove portion has a larger width, thereby forming a larger opening, and on the other hand, the second clamping groove portion has a smaller width, thereby ensuring the thickness of the profile on both sides of the second clamping groove portion, so as to ensure the connection strength after installation of the limiting protrusion. Moreover, the first clamping groove portion and the second clamping groove portion form a special-shaped sliding clamping groove 104, which can increase the cooperation surface with the limiting protrusion, thereby playing a limiting role in multiple directions, so as to avoid vibration between the battery shell and the power tool during use.

[0037] Optionally, in some possible embodiments, the connecting buckle 201 includes an installation portion 2011, a button portion 2012 and a clamping portion 2013, the installation portion 2011 is in sliding connection with the protective shell 100, a through hole is formed in the protective shell 100, and the button portion 2012 and the clamping portion 2013 extend to the outside of the protective shell 100 through the through hole.

[0038] Optionally, in some possible embodiments, the length of the first clamping groove portion along the insertion direction is L1, the length of the second clamping groove portion along the insertion direction is L2, and the spacing between the two sliding clamping grooves 104 on both sides of the connecting protrusion 103 is L3, and 27mm≤L1≤30mm, 22mm≤L2≤25mm, and 48mm≤L3≤51mm.

[0039] Please refer to Figure 7 and Figure 8As shown, the length of the first clamping groove and the length of the second clamping groove are adapted to the limiting protrusion on the electric tool. The length of the first clamping groove is greater than the length of the second clamping groove, so as to ensure that the limiting protrusion is quickly assembled in the sliding clamping groove 104. Please refer to Figure 8 As shown, the distance between the sliding clamping grooves 104 on both sides of the connecting protrusion 103 is 48-51 mm, which can better adapt to the limiting protrusion on the existing electric tool and improve the practicability of the entire battery shell structure. During production, the distance between the two sliding clamping grooves 104 can be selectively adjusted according to the corresponding electric tool model to ensure the adaptability and stability after installation.

[0040] Please refer to Figure 5 As shown, in this embodiment, the connecting buckle 201 is in a strip structure, one end of the connecting buckle 201 is bent downward and matched with the protective shell 100 to form a connecting part. The side of the connecting buckle 201 away from the connecting part protrudes upward and extends to the outside of the protective shell 100 through the through hole on the protective shell 100 to form a clamping part 2013 connected with the electric tool. A button part 2012 is arranged between the mounting part 2011 and the clamping part 2013, and the entire connecting buckle 201 can be driven through the button part 2012. The connecting buckle 201 is slidably connected with the protective shell 100 through the mounting part 2011, the elastic member 202 and the fixing seat 300 are arranged at the lower end of the connecting buckle 201, the elastic member 202 abuts against the lower end face of the connecting buckle 201, so that the clamping part 2013 always has a tendency to protrude upward and expose outside the protective shell 100 and lock with the electric tool. When the battery needs to be disassembled, the operator only needs to press the button part 2012 to switch the connecting buckle 201 to the unlocking position, at this time the clamping part 2013 is withdrawn into the inside of the protective shell 100, and the battery can be disassembled through the sliding fork, which is convenient to operate. After stopping pressing the button part 2012, the connecting buckle 201 is automatically reset under the elastic force of the elastic member 202, which is convenient for next time installation and locking.

[0041] Optionally, in some possible embodiments, the inner side wall of the protective shell 100 is provided with a mounting groove 105, the size and shape of the mounting groove 105 are adapted to the mounting part 2011 of the connecting buckle 201, and the mounting part 2011 is slidably arranged in the mounting groove 105.

[0042] Please refer to Figure 3 and Figure 4As shown, the inner side wall of the protective shell 100 is provided with a strip-shaped mounting groove 105, and the mounting portion 2011 of the connecting buckle 201 is also provided in a strip-shaped mounting plate structure. The mounting portion 2011 is inserted into the mounting groove 105, and under the limiting of the mounting groove 105, the entire connecting buckle 201 moves linearly in the vertical direction within the mounting groove 105. The mounting portion 2011 cooperates with the mounting groove 105 to limit the movement direction of the connecting buckle 201, so as to ensure the switching of the connecting buckle 201 between the locked position and the unlocked position, and avoid the locking effect of the connecting buckle 201 being affected by the jamming of the connecting buckle 201 during the switching process.

[0043] Optionally, in some possible embodiments, the mounting portion is slidingly arranged in the mounting groove, and when the connecting buckle is located at the locked position, the length of the mounting portion extending into the mounting groove is L4. The protective shell has a first mounting surface and a second mounting surface arranged oppositely, and the connecting buckle is arranged between the first mounting surface and the second mounting surface. The distance between the first mounting surface and the second mounting surface is L5, and L4 = 0.1 ± 0.05 × L5. Please refer to Figure 9 As shown, when the mounting portion 2011 is in the locked position, the length of the extension portion inserted into the mounting groove 105 is the shortest, and this state is also the initial state when the connecting buckle 201 is installed. When the length of the mounting portion 2011 extending into the mounting groove 105 is too small, the connecting buckle 201 may be separated from the mounting groove 105 during use, affecting the use effect. Conversely, when the length of the mounting portion 2011 extending into the mounting groove 105 is too large, under the limitation of other structures of the shell, the mounting portion 2011 is difficult to be clamped into the mounting groove 105, and problems such as high installation cost or inability to install may occur. When the length L4 of the mounting portion 2011 extending into the mounting groove 105 is 0.1 ± 0.05 × L5, the stability of the connecting buckle 201 after being connected with the mounting groove 105 can be ensured, and the mounting portion 2011 can be quickly and conveniently clamped into the mounting groove 105 by using the deformation of the material itself and the gap between the shell during installation, facilitating the quick disassembly and assembly of the connecting buckle 201.

[0044] Optionally, in some possible embodiments, the button portion 2012 is provided with an anti-slip assembly.

[0045] Please refer to Figure 5 As shown, the anti-slip assembly is used to improve the friction of the surface of the button portion 2012, so as to prevent the operator from being separated when pressing the button portion 2012. It can be understood that the battery and other electronic structures are relatively fragile and have a high cost. When the battery is disassembled by pressing the button portion 2012, if the battery is suddenly separated from the button portion 2012, the battery is easily separated from the power tool and falls, causing the battery to be damaged. Therefore, the anti-slip assembly can ensure the safety during operation and protect the battery.

[0046] Optionally, in some possible embodiments, the clamping portion 2013 is provided with a guide slope.

[0047] As shown in Figure 1 and Figure 5 , the clamping portion 2013 is triangular in structure, and one side of the clamping portion 2013 forms an inclined guide slope. The guide slope is used to guide the clamping portion 2013 to be clamped into the locking clamping groove on the power tool, so as to achieve the effect of automatic locking. In the process of installing the entire battery shell structure on the power tool, only the protective shell 100 needs to be slid, and under the action of the guide slope, the connecting buckle 201 is automatically locked with the power tool, without the need for the operator to press the button portion 2012, so that the installation is convenient and fast, and one-handed operation can be realized.

[0048] Optionally, in some embodiments of the present embodiment, the shell includes an upper shell 101 and a lower shell 102, and the upper shell 101 and the lower shell 102 are detachably connected.

[0049] As shown in Figure 1 , in the present embodiment, the lower shell 102 is a hollow shell with an open upper end, and the inside of the lower shell 102 can be provided with protrusions or grooves for fixing the battery pack 400. At the same time, the lower shell 102 is provided with heat dissipation fins to assist heat dissipation. The upper shell 101 is arranged on the opening of the lower shell 102 and plays a protective and sealing role with the lower shell 102. The upper shell 101 and the lower shell 102 are detachably connected by buckles, bolts or the like, and the specific connection mode is not limited. The detachable connection of the upper shell 101 and the lower shell 102 facilitates production and facilitates the installation of the battery pack 400 and other electronic elements inside the protective shell 100, improving assembly efficiency.

[0050] Optionally, in some possible embodiments, a sealing assembly is arranged at the connection between the upper shell 101 and the lower shell 102.

[0051] As shown in Figure 1 , a sealing groove is arranged at the edge of the upper shell 101 and the lower shell 102, and a sealing protrusion is correspondingly arranged at the edge of the upper shell 101 and clamped in the sealing groove. On the one hand, the sealing effect is achieved by the interference fit between the annular sealing protrusion and the sealing groove, so as to prevent liquid or other impurities from entering the inside of the protective shell 100. On the other hand, the cooperation of the sealing protrusion and the sealing groove can improve the connection strength between the upper shell 101 and the lower shell 102, so as to avoid damage to the edges of the upper shell 101 or the lower shell 102, and improve the service life and protection effect of the protective shell 100.

[0052] Optionally, in some possible embodiments, the sealing assembly can be a sealing ring arranged at the connection between the upper shell 101 and the lower shell 102, and the sealing ring can be made of soft materials such as rubber or silicone.

[0053] Optionally, in some possible embodiments, the upper shell 101 and / or the lower shell 102 is provided with a buffer protection piece 900, which is used to protect the lower shell 102.

[0054] As shown in Figure 1 , the side wall of the shell is provided with a buffer protection piece 900, which is covered on the edge ridge and corner of the upper shell 101 or the lower shell 102, so as to protect the protruding ridge and corner of the shell 100. The buffer protection piece 900 can be made of soft materials such as rubber or silicone, and can also be made of plastic or other composite materials. It can be understood that the protruding ridge or corner of the shell is easy to collide and rub with the external environment during use or transportation, which may cause damage to the protruding part. Therefore, the buffer protection piece 900 is arranged to protect the protruding part of the shell, thereby improving the service life of the shell.

[0055] As shown in Figure 6 , the utility model further provides a detachable battery, which comprises a battery pack 400, a control circuit board 500 and the battery shell structure of any one of the above, the battery pack 400 and the control circuit board 500 are arranged in the inside of the battery shell structure, and the control circuit board 500 is electrically connected with the battery pack 400. The detachable battery adopts the above-mentioned battery shell structure, which is convenient to disassemble and assemble and has good stability.

[0056] Optionally, in some possible embodiments, the detachable battery further comprises an electric quantity display assembly, the electric quantity display assembly comprises a light guide column 600, an indicating lamp 700 and a control button 800, the indicating lamp 700 is arranged on the control circuit board 500, the light entrance surface of the light guide column 600 corresponds to the position of the indicating lamp 700, the control button 800 is arranged on one side of the protective shell 100 of the battery shell structure, and the control button 800 is electrically connected with the control circuit board 500.

[0057] As shown in Figure 6As shown, the control circuit board 500 is provided with the power indicator 700 composed of a plurality of lamp beads, and the remaining power of the battery pack 400 is displayed by the number of the indicator 700. The indicator 700 is arranged in the interior of the protective shell 100, avoiding the indicator 700 or the control circuit board 500 from being exposed to the external environment, and improving the service life of the indicator 700. In order to ensure that the operator can clearly observe the indicator 700, the protective shell 100 is provided with a transparent light guide column 600, the light entrance surface of the light guide column 600 corresponds to the position of the indicator 700, and the light fiber effect is formed through the transparent light guide column 600. The information of the indicator 700 can be known by observing the light emitted by the light guide column 600, so as to judge the remaining power of the battery pack 400. The protective shell 100 is also provided with a control button 800, and the operator can control the indicator 700 to display the remaining power of the battery pack 400 by pressing the control button 800.

[0058] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0059] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery casing structure, characterized in that, include: The protective housing (100) and the connecting assembly (200) include a connecting buckle (201) and an elastic element (202). The protective housing (100) is provided with a connecting protrusion (103). The connecting buckle (201) is disposed at one end of the connecting protrusion (103). The connecting buckle (201) has a locking position for engaging with a power tool and an unlocking position for disengaging from the power tool. The connecting buckle (201) is driven to switch between the locking position and the unlocking position. The protective housing (100) is provided with a fixing seat (300) inside. The fixing seat (300) is spaced apart from the connecting buckle (201). The elastic element (202) is disposed on the fixing seat (300) and provides elastic force to reset the connecting buckle (201) to the locking position.

2. The battery casing structure according to claim 1, characterized in that, The connecting protrusion (103) is provided with sliding slots (104) on both sides, and the sliding slots (104) can slide and engage with the limiting protrusion on the power tool.

3. The battery casing structure according to claim 2, characterized in that, Each of the sliding slots (104) includes at least a first slot portion and a second slot portion arranged sequentially along the insertion direction, wherein the width of the first slot portion is greater than the width of the second slot portion.

4. The battery casing structure according to claim 3, characterized in that, The length of the first slot portion along the insertion direction is L1, the length of the second slot portion along the insertion direction is L2, and the distance between the two sliding slots (104) on both sides of the connecting protrusion (103) is L3. Then, 27mm≤L1≤30mm, 22mm≤L2≤25mm, and 48mm≤L3≤51mm.

5. The battery casing structure according to claim 1, characterized in that, The connecting buckle (201) includes a mounting part (2011), a button part (2012), and a snap-fit ​​part (2013). The mounting part (2011) is slidably connected to the protective housing (100). The protective housing (100) has a through hole. The button part (2012) and the snap-fit ​​part (2013) extend to the outside of the protective housing (100) through the through hole.

6. The battery casing structure according to claim 5, characterized in that, The inner wall of the protective housing (100) is provided with a mounting groove (105), and the mounting part (2011) is slidably disposed in the mounting groove (105). When the connecting buckle (201) is in the locked position, the length of the mounting part (2011) extending to the mounting groove (105) is L4. The protective housing has a first mounting surface and a second mounting surface disposed opposite to each other. The connecting buckle is disposed between the first mounting surface and the second mounting surface. The distance between the first mounting surface and the second mounting surface is preset to be L5, then L4 = 0.1 ± 0.05 × L5.

7. The battery casing structure according to claim 1, characterized in that, The housing includes an upper housing (101) and a lower housing (102), the upper housing (101) and the lower housing (102) are detachably connected, and a sealing assembly is provided at the connection between the upper housing (101) and the lower housing (102).

8. The battery casing structure according to claim 7, characterized in that, A buffer protection element (900) is provided on the upper housing (101) and / or the lower housing (102).

9. A removable battery, characterized in that, include: The battery pack (400), the control circuit board (500), and the battery housing structure as described in any one of claims 1-8, wherein the battery pack (400) and the control circuit board (500) are both disposed inside the battery housing structure, and the control circuit board (500) is electrically connected to the battery pack (400).

10. The removable battery according to claim 9, characterized in that, The removable battery also includes a power display component, which includes a light guide (600), an indicator light (700), and a control button (800). The indicator light (700) is disposed on the control circuit board (500), and the light-incident surface of the light guide (600) corresponds to the position of the indicator light (700). The control button (800) is disposed on one side of the protective housing (100) of the battery housing structure, and the control button (800) is electrically connected to the control circuit board (500).

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