Battery charging device

Abstract

The invention discloses a battery charging device, which comprises a battery with a toothed part on the outer wall; the charging rack comprises a mounting channel, a charging end plate, a battery locking mechanism, an unlocking mechanism and an unlocking keeping mechanism; the battery locking mechanism at least comprises a locking piece; the unlocking keeping mechanism at least comprises a pressing piece, a pushing piece and a keeping matching piece, and the unlocking mechanism has an unlocking keeping state capable of being locked with the keeping matching piece; when the battery is inserted into the mounting channel, the tooth part and the locking part are engaged and locked, the pressing part can be triggered to move along the first direction so as to drive the pushing part to move along the second direction, and the keeping matching part is propped against the unlocking mechanism; external force is applied to drive the unlocking mechanism to move in the direction of the mounting channel, the locking piece can be driven to be separated from the tooth part, and the unlocking mechanism enters an unlocking keeping state, so that the unlocking mechanism is kept in the state of driving the locking piece to be separated from the tooth part, and the battery can be separated from the charging rack. According to the invention, the charging rack can stably lock the battery, and the locking and unlocking operations are convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of battery charging structures, and in particular relates to a battery charging device. Background Art

[0002] With the popularity of commercial high-capacity density lithium batteries, more and more users choose lithium battery electric vehicles as daily means of transportation, production tools, etc. In order to facilitate the charging of electric vehicles, it is necessary to set up battery swap stations to extend the travel distance. The batteries in the battery swap stations are installed on charging racks for charging.

[0003] Chinese patent CN220180594U discloses "A battery pack locking and fixing mechanism", which aims to solve the problem of battery pack shaking in the battery compartment. The battery pack is limited in the front, rear, left and right directions by four fixing components. The structure is relatively complex, and the locking and unlocking operations need to be performed one by one, which is relatively inconvenient to use. In addition, the fixing components occupy a relatively large volume, which increases the floor space of the overall structure. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a battery charging device, which is provided with an unlocking and holding mechanism to ensure smooth removal of the battery, and the battery locking mechanism, unlocking mechanism, and unlocking and holding structure are reasonably arranged, the occupied space is reduced, and the battery insertion and removal operation is convenient.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a battery charging device, comprising:

[0006] A battery, the outer wall of which has teeth;

[0007] The charging rack comprises an installation channel formed by the bracket, a charging end plate located at the end of the installation channel, a battery locking mechanism, an unlocking mechanism, and an unlocking holding mechanism provided on the charging end plate;

[0008] The battery locking mechanism at least comprises a locking member rotatably connected to the charging stand and a first elastic member abutting against the locking member;

[0009] The unlocking and holding mechanism at least comprises a pressing member, a pushing member arranged in linkage with the pressing member, and a holding matching member, and the unlocking mechanism has an unlocking and holding state that can be locked with the holding matching member;

[0010] When the battery is inserted into the installation channel, the tooth portion and the locking member are engaged and locked, and the pressing member can be triggered to move along the first direction to drive the pushing member to move along the second direction, and the retaining fitting member abuts against the unlocking mechanism;

[0011] Applying external force to drive the unlocking mechanism to move along the direction of the installation channel can drive the locking member to disengage from the tooth portion, and the unlocking mechanism enters an unlocking holding state, so that the unlocking mechanism remains in a state of driving the locking member to disengage from the tooth portion, and the battery can be detached from the charging rack.

[0012] Furthermore, the unlocking mechanism forms a retaining mating hole, and a portion of the retaining mating piece extends into the retaining mating hole, and the two are locked and limited, and the unlocking mechanism enters an unlocking and holding state.

[0013] Furthermore, the unlocking mechanism at least includes an unlocking member and an unlocking push rod connected to the unlocking member, the unlocking member has an inclined driving surface, and the locking member forms a bevel surface that abuts against the inclined driving surface; when external force is applied to the unlocking push rod, the unlocking member can be driven to move downward along the installation channel, and the inclined driving surface and the bevel surface cooperate to drive the locking member to flip in the direction away from the battery; when the unlocking mechanism is out of the unlocking holding state, the bevel surface drives the unlocking member to automatically move upward along the installation channel, or the bevel surface and the second elastic member cooperate to drive the unlocking member to automatically move upward along the installation channel.

[0014] Furthermore, the retaining fitting includes a fixed part and a telescopic part, the fixed part is sleeved with a third elastic part, and the telescopic part can be retracted into the interior of the fixed part; when the retaining fitting is in contact with the unlocking mechanism, it is misaligned with the retaining fitting hole, and the telescopic part retracts into the fixed part; when the telescopic part extends into the retaining fitting hole, the retaining fitting and the retaining fitting hole are locked and limited, and the third elastic part is in a compressed state.

[0015] Furthermore, the charging end plate forms a mounting groove, the propulsion member moves in the mounting groove, and the telescopic portion penetrates the side wall of the mounting groove to cooperate with the unlocking member.

[0016] Furthermore, the pressing member is translated upward by a distance S1, and the unlocked holding state is released; when the battery and the locking member are locked, the distance between the battery tooth portion and the locking point of the locking member and the upper surface of the charging end plate is S2, and no tooth portion is provided within the length range from S1 to S2 of the battery axial direction corresponding to its bottom surface.

[0017] Furthermore, the pressing member abuts against a fourth elastic member, and the fourth elastic member is used to provide a tendency for the pressing member to move in a direction protruding from the charging terminal plate.

[0018] Furthermore, the unlocking member is U-shaped, and its closed end forms an inclined driving surface. The locking member is arranged inside the lower part of the unlocking member, and its top surface forms a beveled surface.

[0019] Furthermore, a cutting portion is formed on the closed end of the unlocking member toward one side of the battery; and extended protrusions that can abut against the second elastic member are formed on both sides of the unlocking member.

[0020] Furthermore, the charging rack forms a guide slot that cooperates with both sides of the unlocking member, and the guide slot extends along the length direction of the installation channel so that the unlocking member can move vertically along the installation channel.

[0021] Furthermore, the bracket is movably provided with a ball, and when the battery is inserted into the installation channel, the outer wall thereof rolls with the ball; the ball abuts against the resilient member.

[0022] Furthermore, the first direction and the second direction are perpendicular to each other.

[0023] The beneficial effects of the present invention are: 1) The battery locking mechanism is used to achieve a stable locking of the battery by the charging rack to prevent the battery from being detached at will, and the locking can be achieved during the process of inserting the battery into the installation channel, which is easy to operate; 2) The setting of the unlocking and holding mechanism allows the unlocking mechanism to remain in this state after unlocking the battery until the battery can be smoothly pulled out of the charging rack; 3) After the battery is fully inserted into the installation channel, the unlocking and holding mechanism enters a preparatory state in which the retaining mating piece and the unlocking mechanism are in contact with each other. When the unlocking piece drives the locking piece to flip in a direction away from the tooth portion of the battery, the retaining mating piece of the unlocking and holding mechanism partially enters the retaining mating hole. The entire process only requires operating the unlocking mechanism, which is simple and simplifies the operating steps; 4) When an external force drives the unlocking mechanism to move, the locking piece can be disengaged from the tooth portion. At the same time, the unlocking mechanism enters an unlocking holding state, and the battery is released. After the pressing part is pressed, the retaining fitting can automatically disengage from the retaining fitting hole. The whole process only requires one step of pressing down the unlocking part, which can ensure the smooth removal of the battery. Moreover, after the battery is removed or before the next insertion of the battery, there is no need to detect and confirm the state of the unlocking mechanism to smoothly couple the charging and lock the battery, which makes the operation easier; 5) The unlocking and holding mechanism is arranged on the charging end plate at the bottom, and the unlocking mechanism and the battery locking mechanism are arranged on the side of the charging rack. The overall layout is reasonable, and different mechanisms are scattered in different areas, which reduces the space they occupy, which is beneficial to reducing the battery charging device; 6) Ball bearings are embedded in the bracket of the charging rack, and the ball bearings can also be designed to float to ensure the smooth removal of the battery without wearing the outer wall of the battery; 7) The battery locking mechanism, unlocking mechanism, and unlocking and holding mechanism are all mechanical structures, and no electronic structure is adopted. They are more stable and reliable, and have a longer overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The battery charging device provided by the present invention is a three-dimensional Figure 1 .

[0025] Figure 2 The battery charging device provided by the present invention is a three-dimensional Figure 2 .

[0026] Figure 3 This is a schematic diagram of the exploded structure of the charging stand provided by the present invention.

[0027] Figure 4 The partial structure diagram of the battery locking mechanism, unlocking mechanism and unlocking holding mechanism provided by the present invention Figure 1 .

[0028] Figure 5 The partial structure diagram of the battery locking mechanism, unlocking mechanism and unlocking holding mechanism provided by the present invention Figure 2 .

[0029] Figure 6 The partial structure diagram of the battery locking mechanism, unlocking mechanism and unlocking holding mechanism provided by the present invention Figure 3 .

[0030] Figure 7 A three-dimensional diagram of the battery locking mechanism, unlocking mechanism, and unlocking holding mechanism provided by the present invention.

[0031] Figure 8 A cross-sectional view of the locking member and the toothed portion engaged and locked according to the present invention.

[0032] Fig. 9 A cross-sectional view of the locking member and the toothed portion provided by the present invention when unlocked and disengaged.

[0033] Fig.10 A cross-sectional view of the retaining fitting and retaining fitting hole provided by the present invention in an unlocked retaining state.

[0034] Fig.11 A partial cross-sectional view of the retaining fitting and retaining fitting hole provided by the present invention in an unlocked retaining state.

[0035] Among them, 1-battery, 11-tooth portion, 2-charging rack, 21-bracket, 211-guide slide groove, 212-support rod, 213-connecting ring, 214-ball, 22-installation channel, 23-charging end plate, 231-installation groove, 3-battery locking mechanism, 31-locking member, 311-beveled surface, 32-first elastic member, 4-unlocking mechanism, 41-retaining matching hole, 42-unlocking member, 421-inclined driving surface, 422-cutting portion, 423-extending convex portion, 43-unlocking push rod, 44-second elastic member, 45-unlocking button, 5-unlocking holding mechanism, 51-pressing member, 511-fourth elastic member, 52-pushing member, 521-body, 522-acting portion, 53-retaining matching member, 531-fixing portion, 532-telescopic portion, 533-third elastic member, 534-fifth elastic member. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] like Figure 1 , Figure 2 As shown, a battery charging device includes a battery 1 with a tooth portion 11 on the outer wall, and a charging stand 2 for the battery 1 to be inserted and charged. In this embodiment, the tooth portion 11 extends along the entire length of the battery 1, or extends along most of the length of the battery 1.

[0038] The charging rack 2 includes an installation channel 22 formed by a bracket 21, a charging end plate 23 located at the end, a battery locking mechanism 3, an unlocking mechanism 4, and an unlocking holding mechanism 5 provided on the charging end plate 23. In this embodiment, the outer contour of the bracket 21 is hexagonal, and it includes a support rod 212 extending in the axial direction, and a connecting ring 213 at the entrance end of the installation channel 22, connecting multiple support rods 212.

[0039] The battery locking mechanism 3 at least includes a locking member 31 rotatably connected to the charging rack 2 and a first elastic member 32 abutting against the locking member 31. In this embodiment, the first elastic member 32 is a torsion spring structure, which is used to drive the locking member 31 toward the direction close to the tooth portion 11 of the battery 1. The top surface of the locking member 31 forms a chamfered surface 311, such as Figure 6 As shown, it extends obliquely from top to bottom and from the outside to the inside of the installation channel 22. The bottom of the locking member 31 is rotatably connected to the charging rack 2 via a rotating shaft.

[0040] The unlocking mechanism 4 at least includes an unlocking member 42 and an unlocking push rod 43 connected to the unlocking member 42. An unlocking button 45 may also be provided at the end of the unlocking push rod 43. In this embodiment, the unlocking member 42 is in a U-shape with an opening facing downward, and an inclined driving surface 421 is formed at its closed end. Figure 6As shown, the inclined driving surface 421 extends obliquely from top to bottom and from outside to inside, that is, it has the same oblique direction as the chamfered surface 311 of the locking member 31, and the locking member 31 is arranged inside the lower part of the unlocking member 42; the closed end of the unlocking member 42 forms a cutting portion 422 toward the battery 1 side, and the cutting portion 422 extends obliquely from top to bottom and from outside to inside, which forms an avoidance effect on the insertion of the battery 1, and can also form a guide for the downward insertion of the battery 1; the unlocking member 42 is formed with an extended protrusion 423 on both sides, and the lower part of the extended protrusion 423 abuts against the second elastic member 44. The unlocking mechanism 4 forms a retaining mating hole 41, specifically, the retaining mating hole 41 is formed on the free end wall thickness of one side of the unlocking member 42, and of course, the specific position and number of the retaining mating hole 41 are not limited.

[0041] In order to ensure that the unlocking member 42 can move up and down along the installation channel 22, a guide groove 211 is formed on the charging frame 2. The guide groove 211 can be set on the bracket 21 or on the charging end plate 23. In the present embodiment, it is set on the charging end plate 23 and extends along the axial length direction of the installation channel 22. Both sides of the unlocking member 42 are located in the guide groove 211, so that the guide groove 211 limits the unlocking member 42 to move up and down along the installation channel 22 to avoid displacement.

[0042] The unlocking and holding mechanism 5 at least includes a pressing member 51, a pushing member 52 arranged in linkage with the pressing member 51, and a holding fitting member 53. The pressing member 51 abuts against a fourth elastic member 511, and the fourth elastic member 511 is used to provide a tendency for the pressing member 51 to move in a direction protruding from the charging terminal plate 23. In other words, Figure 4 Taking the direction shown as an example, the fourth elastic member 511 provides an upward elastic force to the pressing member 51 .

[0043] A mounting groove 231 is formed on the charging end plate 23, and the pusher 52 moves in the mounting groove 231. The mounting groove 231 limits the movement range of the pusher 52 to prevent it from being offset. The pressing member 51 extends out from the top opening of the mounting groove 231, and the telescopic portion 532 penetrates the side wall of the mounting groove 231 and cooperates with the unlocking member 42. The cooperation here includes the telescopic portion 532 abutting against the side wall of the unlocking member 42, and also includes the telescopic portion 532 extending into the retaining cooperation hole 41 of the unlocking member 42.

[0044] like Figure 4 , Figure 5 , Fig.10 As shown, the retaining fitting 53 includes a fixed portion 531 and a telescopic portion 532. The fixed portion 531 is sleeved with a third elastic member 533. The telescopic portion 532 can be retracted into the fixed portion 531. A fifth elastic member 534 is also provided between the telescopic portion 532 and the fixed portion 531. Fig.11 shown.

[0045] The pusher 52 includes a body 521 for connecting the fixing portion 531 and an acting portion 522 whose height is less than that of the body 521. The top surface of the acting portion 522 has an arc surface. The pressing member 51 moves the pusher 52 in the horizontal direction by pressing the arc surface downward.

[0046] The unlocking mechanism 4 has an unlocking holding state that can be locked with the retaining fitting 53. Specifically, when the telescopic portion 532 of the retaining fitting 53 extends into the retaining fitting hole 41 on the unlocking member 42, the retaining fitting 53 and the retaining fitting hole 41 are both locked and limited, and the unlocking member 42 cannot move upward or downward. The unlocking mechanism 4 enters the unlocking holding state, and the third elastic member 533 is in a compressed state.

[0047] In order to facilitate the insertion of the battery 1 into the charging rack 2 along the installation channel 22, a ball 214 is movably arranged on the bracket 21, and the ball 214 rolls with the outer wall of the battery 1, thereby reducing the friction resistance of the battery 1 inserted into the installation channel 22. The ball 214 can also abut against the resilient member. At this time, the ball 214 is a floating design, and its relative activity space range is larger. While facilitating the insertion of the battery 1, it provides more adjustable space for the plug-in cooperation between the battery 1 and the charging terminal plate 23. Even if the plug-in structure deviates from the target position, the ball 214 and the resilient member can cooperate to form a stable support for the battery 1 in all directions.

[0048] In the initial state, the pressing member 51 protrudes from the surface of the charging end plate 23 under the action of the fourth elastic member 511, the pushing member 52 is not driven by the pressing member 51, and the third elastic member 533 is in a naturally stretched state, maintaining a certain distance between the mating member 53 and the unlocking member 42; the locking member 31 flips toward the inside of the installation channel 22 under the action of the first elastic member 32.

[0049] When the battery 1 is inserted into the installation channel 22, the tooth portion 11 can move against the locking member 31. Under the action of the first elastic member 32, the tooth portion 11 and the locking member 31 are engaged and locked. Figure 8 As shown, the battery 1 moves close to the charging terminal plate 23 and triggers the pressing member 51 to move along the first direction, thereby driving the pushing member 52 to move along the second direction, and making the retaining fitting member 53 abut against the unlocking mechanism 4. At this time, the retaining fitting member 53 is misaligned with the retaining fitting hole 41. Specifically, the retaining fitting hole 41 is located above the retaining fitting member 53, so that the retaining fitting member 53 abuts against the side wall of the unlocking member 42, and the telescopic portion 532 is pressed and retracted by the unlocking member 42 into the fixed portion 531. Of course, the battery 1 and the locking member 31 are always kept in the locked state. In this embodiment, the first direction and the second direction are perpendicular to each other, and the specific first direction is Figure 1 The vertical direction shown is the up and down direction, and the second direction is Figure 1 Horizontal direction shown.

[0050] When the battery 1 needs to be unlocked, an external force is applied to drive the unlocking mechanism 4 to move along the direction of the installation channel 22. Specifically, the unlocking button 45 is pressed down to make the unlocking push rod 43 move downward, thereby driving the unlocking member 42 to move downward along the installation channel 22. Under the abutment and cooperation of the inclined driving surface 421 of the unlocking member 42 and the beveled surface 311 of the locking member 31, the locking member 31 overcomes the action of the first elastic member 32 and flips in the direction away from the battery 1, so that the locking member 31 is disengaged from the tooth portion 11. Fig. 9 As shown, the telescopic portion 532 enters the retaining fitting hole 41, as shown Fig.10 As shown, the unlocking mechanism 4 enters the unlocking holding state, at which time the unlocking member 42 cannot move upward or downward due to the restriction of the retaining mating member 53, so that the unlocking mechanism 4 remains in the state of driving the locking member 31 to disengage from the tooth portion 11, and the battery 1 can be smoothly detached from the charging stand 2.

[0051] When the battery 1 is pulled out, under the reset action of the fourth elastic member 511, the pressing member 51 moves upward and disengages from the abutment with the pushing member 52, so that under the action of the third elastic member 533, the telescopic portion 532 disengages from the retaining matching hole 41, and the unlocking mechanism 4 disengages from the unlocking holding state. Under the joint action of the beveled surface 311 and the inclined driving surface 421, specifically under the reset action of the first elastic member 32 of the locking member 31, the unlocking member 42 automatically moves up along the installation channel 22. Of course, under the action of the second elastic member 44 below the extended protrusion 423, the beveled surface 311 and the inclined driving surface 421 interact with each other to cooperate and drive the unlocking member 42 to automatically move up along the installation channel 22, and the unlocking mechanism 4 re-enters the initial state, and the battery locking mechanism 3 and the unlocking holding mechanism 5 also re-enter the initial state.

[0052] In order to ensure that the battery 1 is smoothly pulled out, the pressing member 51 is defined to move upward by a distance S1, and then the unlocking holding state of the unlocking mechanism 4 is released. When the battery 1 and the locking member 31 are locked, the minimum distance between the locking point between the tooth portion 11 of the battery 1 and the locking member 31 and the end of the tooth portion 11 is S2, and S1>S2.

[0053] When the battery 1 is in the unlocked holding state, the pressing member 51 moves upward under the action of the fourth elastic member 511, and the pushing member 52 retreats synchronously under the action of the third elastic member 533, and the retaining fitting member 53 moves synchronously in the direction of disengaging from the retaining fitting hole 41 of the unlocking member 42. When the pressing member 51 moves upward from the upper surface of the charging end plate 23 by a distance of S1, the retaining fitting member 53 just disengages from the retaining fitting hole 41 of the unlocking member 42. At this time, the unlocked holding state of the unlocking mechanism 4 is released, the unlocking member 42 automatically resets, and the locking member 31 resumes the locking function. If the locking state is defined, the locking point of the locking member 31 is at a distance of S2 from the upper surface of the charging end plate 23, then there should be no locking point on the battery 1 within the range from S1 to S2 from the bottom surface of the battery 1, that is, no tooth portion 11 is provided within the length range from S1 to S2 of the bottom surface of the battery 1 axially corresponding to the bottom surface of the battery 1, so as to ensure that the battery 1 can be reliably removed. The above structure enables the locking member 31 to rebound after the end of the tooth portion 11 of the battery 1 is completely moved above the locking member 31, thereby effectively ensuring the one-touch unlocking function and the reset of various components after the battery 1 is separated from the charging rack 2, including the reset of the locking mechanism 3, the unlocking mechanism 4, and the unlocking holding mechanism 5. Moreover, the above structure is completely coordinated by the moving stroke of the pressing member 51 and the battery 1, thereby ensuring the long-term stability and reliability of the locking mechanism 3.

[0054] The above specific implementation modes are used to explain the present invention rather than to limit the present invention. Any modification and change made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A battery charging device, characterized in that: include: A battery (1) having an outer wall with teeth (11); A charging rack (2) comprises a mounting channel (22) formed by a bracket (21), a charging end plate (23) located at the end of the mounting channel (22), a battery locking mechanism (3), an unlocking mechanism (4), and an unlocking holding mechanism (5) provided on the charging end plate (23); The battery locking mechanism (3) comprises at least a locking member (31) rotatably connected to the charging rack (2) and a first elastic member (32) abutting against the locking member (31); The unlocking and holding mechanism (5) at least comprises a pressing member (51), a pushing member (52) arranged in linkage with the pressing member (51), and a holding fitting member (53); the unlocking mechanism (4) has an unlocking and holding state that can be locked with the holding fitting member (53); When the battery (1) is inserted into the installation channel (22), the toothed portion (11) and the locking member (31) are engaged and locked, and the pressing member (51) can be triggered to move along a first direction to drive the pushing member (52) to move along a second direction, and the retaining fitting member (53) is brought into contact with the unlocking mechanism (4); Applying external force drives the unlocking mechanism (4) to move along the direction of the installation channel (22), which can drive the locking member (31) to disengage from the tooth portion (11), and the unlocking mechanism (4) enters an unlocking holding state, so that the unlocking mechanism (4) remains in a state of driving the locking member (31) to disengage from the tooth portion (11), and the battery (1) can be disengaged from the charging rack (2).

2. The battery charging device according to claim 1, characterized in that: The unlocking mechanism (4) forms a retaining matching hole (41), and a portion of the retaining matching piece (53) extends into the retaining matching hole (41), and the two are locked and limited, and the unlocking mechanism (4) enters an unlocking and holding state.

3. The battery charging device according to claim 1 or 2, characterized in that: The unlocking mechanism (4) at least comprises an unlocking member (42) and an unlocking push rod (43) connected to the unlocking member (42); the unlocking member (42) has an inclined driving surface (421), and the locking member (31) forms an oblique cut surface (311) that abuts against the inclined driving surface (421); when an external force is applied to the unlocking push rod (43), the unlocking member (42) can be driven to move downward along the installation channel (22), and the inclined driving surface (421) and the oblique cut surface (311) cooperate to drive the locking member (31) to flip in a direction away from the battery (1); when the unlocking mechanism (4) is out of the unlocking holding state, the oblique cut surface (311) drives the unlocking member (42) to automatically move upward along the installation channel (22), or the oblique cut surface (311) and the second elastic member (44) cooperate to drive the unlocking member (42) to automatically move upward along the installation channel (22).

4. The battery charging device according to claim 2, characterized in that: The retaining fitting member (53) comprises a fixed portion (531) and a telescopic portion (532); the fixed portion (531) is sleeved with a third elastic member (533), and the telescopic member (532) can be retracted into the interior of the fixed portion (531); when the retaining fitting member (53) abuts against the unlocking mechanism (4), it is misaligned with the retaining fitting hole (41), and the telescopic member (532) retracts into the fixed portion (531); when the telescopic member (532) extends into the retaining fitting hole (41), the retaining fitting member (53) and the retaining fitting hole (41) are locked and limited, and the third elastic member (533) is in a compressed state.

5. The battery charging device according to claim 4, characterized in that: The charging end plate (23) forms a mounting groove (231), the pushing member (52) moves in the mounting groove (231), and the telescopic portion (532) penetrates the side wall of the mounting groove (231) to cooperate with the unlocking member (42).

6. The battery charging device according to claim 4, characterized in that: The pressing member (51) is translated upward by a distance S1, and the unlocking holding state is released; when the battery (1) and the locking member (31) are locked, the distance between the battery tooth portion (11) and the locking point of the locking member (31) and the upper surface of the charging end plate (23) is S2, and within the length range from S1 to S2 of the axial direction of the battery (1) corresponding to its bottom surface, no tooth portion (11) is provided.

7. The battery charging device according to claim 1, characterized in that: The pressing member (51) abuts against a fourth elastic member (511), and the fourth elastic member (511) is used to provide a tendency for the pressing member (51) to move in a direction protruding from the charging end plate (23).

8. The battery charging device according to claim 3, characterized in that: The unlocking member (42) is U-shaped, and its closed end forms an inclined driving surface (421). The locking member (31) is arranged inside the lower part of the unlocking member (42), and its top surface forms a chamfered surface (311).

9. The battery charging device according to claim 8, characterized in that: A cutting portion (422) is formed on the closed end of the unlocking member (42) facing the battery (1); and extended protrusions (423) that can abut against the second elastic member (44) are formed on both sides of the unlocking member (42).

10. The battery charging device according to claim 8, characterized in that: The charging rack (2) forms a guide slot (211) that cooperates with both sides of the unlocking member (42), and the guide slot (211) extends along the length direction of the installation channel (22) so that the unlocking member (42) can move vertically along the installation channel (22).

11. The battery charging device according to claim 1, characterized in that: The bracket (21) is movably provided with a ball (214); when the battery (1) is inserted into the installation channel (22), the outer wall thereof rolls with the ball (214); and the ball (214) abuts against the resilient member.

12. The battery charging device according to claim 1, characterized in that: The first direction and the second direction are perpendicular to each other.

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