CN218867298U - Detachable battery pack - Google Patents

Abstract

The utility model discloses a detachable battery pack, which comprises a base, a battery and a button, wherein the base is provided with a placing groove, the button is used for being loaded into the placing groove from the notch of the placing groove, the battery is used for plugging the notch of the placing groove, and the battery is matched with the base through a guide structure along the direction of the notch of the placing groove so as to be loaded into the placing groove along the guide direction; the battery and the base are provided with: one is provided with the card shoulder, and another is provided with the elasticity card that can elastic activity is protruding the battery can promote when packing the protruding elastic activity of elasticity card is in order to let out so that battery assembly to preset position, and the battery assembly extremely preset position, the protruding and card shoulder edge of elasticity card standing groove notch direction offsets. Because generally need not to detach after the equipment is accomplished, consequently it is difficult to detach, can not cause the influence to the later stage use, and the equipment is convenient, simple when this detachable battery pack assembles.

Description

Detachable battery pack

Technical Field

The utility model relates to an electrical equipment technical field, more specifically say, relate to a detachable battery pack.

Background

At present, the handheld temperature measurement products in the market all adopt detachable battery packs. Referring to fig. 1, fig. 1 is a schematic structural diagram of a detachable battery pack in the prior art. The removable battery assembly mainly includes a battery holder 100, a key 200 and a battery 300. Wherein be provided with the retaining member on the button 200, the retaining member is protruding like the card, when installing detachable battery pack in products such as temperature measurement products, can operate the retaining member unblock through button 200 presses down.

The battery 300 is generally fixed to the battery holder 100 by screws 400, and specifically, a through hole 300-1 is generally formed in a connection plate of the battery 300, and a threaded hole 100-1 is formed in the battery holder 100. When the battery holder is mounted, the screw 4 is inserted through the through hole 300-1 and screwed with the screw hole 100-1, thereby fixing the battery 300 to the battery holder 100.

In the battery pack, the fixing method not only adds a separate screw 400 to the product cost, but also adds a locking action to the product assembly. The screw 400 is a self-tapping screw, which may cause a risk of thread slipping, and the screw 400 is a mechanical screw, which may cause a copper nut to be embedded in the threaded hole 100-1 of the battery holder 100, thereby increasing the product cost, the mold efficiency, and the cost.

In summary, how to effectively solve the problem of poor connection effect between the base and the battery in the battery assembly is a problem that needs to be solved urgently by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to provide a detachable battery pack, this detachable battery pack can solve the problem that the connection effect is not good between base and the battery among the battery pack effectively.

In order to achieve the above object, the utility model provides a following technical scheme:

a detachable battery assembly comprises a base, a battery and a key, wherein the base is provided with a placing groove, the key is used for being installed into the placing groove from a groove opening of the placing groove, the battery blocks the groove opening of the placing groove, and the battery and the base are matched through a guide structure along the direction of the groove opening of the placing groove so as to be installed into the placing groove along the guide direction; the battery and the base are provided with: one is provided with the card shoulder, and another is provided with the elasticity card that can elastic movement is protruding the battery can promote when packing the protruding elastic movement of elasticity card is in order to give way so that battery assembly to preset position, and the battery assembly extremely preset position, the protruding and card shoulder edge of elasticity card the standing groove notch direction offsets.

When the detachable battery pack is used, the key can be assembled firstly and then the battery is assembled, or the key and the battery are assembled firstly and then are assembled into the base together, and in any mode, after the battery is assembled, the key can be correspondingly installed. The battery is directly guided and inserted through the guide structure, then the elastic clamping protrusions are pressed under the limit of the elastic clamping protrusions, the elastic clamping protrusions are enabled to elastically deform, so that the battery can be continuously loaded, after the battery is loaded in place, notches can be formed at the clamping shoulders, the elastic clamping protrusions can reset and abut against the clamping shoulders when the battery resets, and the battery is prevented from being separated from the placing groove through abutting force. In the above-mentioned removable battery pack, the assembly between the base and the battery is considered, and the main purpose is to assemble the key, so the separation state of the base and the battery is generally before the assembly of the product, but after the provision of the shoulder and the elastic lug, although it is very difficult to separate, because the assembly is completed, the separation is generally not required, and the separation is difficult, and the later use is not affected. But when the equipment, the operation is very convenient simple, only need simply press, can accomplish the installation. Compared with gluing, welding, screw connection and other modes, the assembling mode is very simple and convenient. To sum up, this detachable battery pack can solve the problem that the connection effect is not good between base and the battery among the battery pack effectively.

Preferably, the elastic clamping protrusion is arranged in the placing groove, and the battery is provided with the clamping shoulder; the elastic clamping device is characterized in that one end of the elastic clamping protrusion is fixed in the placing groove through the fixed arm, the other end of the elastic clamping protrusion is provided with a butt surface facing the bottom of the placing groove, and the butt surface is abutted to the shoulder surface of the clamping shoulder.

Preferably, the placing groove is internally provided with two elastic clamping bulges which are arranged in a mirror symmetry mode and are used for respectively abutting against clamping shoulders on two sides of the battery.

Preferably, fixed arm one end connect in the standing groove tank bottom, the fixed arm other end with the protruding one end of elasticity card is connected in order to constitute the opening orientation the U type structure of standing groove tank bottom, the elasticity card protruding with there is the clearance so that the elasticity card is protruding can to fixed arm elasticity activity between the fixed arm.

Preferably, the elastic clamping protrusion and/or the clamping shoulder are/is provided with a guide surface for guiding the elastic clamping protrusion to move elastically when the battery is installed.

Preferably, a supporting arm is arranged between the fixed arm and the groove wall of the placing groove.

Preferably, when the battery is assembled to the predetermined position, the abutting part of the clamping shoulder to the elastic clamping protrusion is deviated to the battery compared with the bending part of the elastic clamping protrusion, so that when the battery moves away from the base, the elastic clamping protrusion moves towards the direction close to the battery.

Preferably, the battery includes a plate portion embedded in the placement groove, and the plate portion is provided with a through hole aligned in a height direction with the elastic clamping protrusion, so that a rod passing through the through hole can push the elastic clamping protrusion to move elastically.

Preferably, each corner of the placement groove has a guide portion, and the guide portion and the battery are guided by a guide hole and a guide post which are matched with each other.

Preferably, the base has a square placing groove, an opening for extending the key portion is opened on one set of opposite side walls of the placing groove, the elastic clamping protrusions are respectively arranged on the other set of opposite side walls of the placing groove, the battery has an abutting portion on the inner side of the plate portion, an elastic member is arranged between the key and the abutting portion, and the external clamping protrusion of the key penetrates out of the placing groove from the groove on the plate portion.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a conventional detachable battery pack in the prior art;

fig. 2 is an exploded schematic view of a detachable battery pack according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a base according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a detachable battery assembly according to an embodiment of the present invention.

The drawings are numbered as follows:

the key comprises a battery holder 100, a key 200, a battery 300, a screw 400, a threaded hole 100-1 and a through hole 300-1;

the base 1, the key 2, the battery 3, the elastic piece 4, the guide structure 5, the abutting structure 6, the placing groove 11, the elastic clamping protrusion 12, the fixing arm 13, the abutting surface 14, the U-shaped structure 15, the avoiding gap 16, the first guide surface 17, the supporting arm 18, the guide hole 19, the first locking surface 20, the external clamping protrusion 21, the clamping shoulder 31, the shoulder surface 32, the second guide surface 33, the plate part 34, the through hole 35, the guide column 36, the abutting portion 37, the inward extending structure 38 and the second locking surface 39.

Detailed Description

The embodiment of the utility model discloses detachable battery pack to solve the problem that the connection effect is not good between base and the battery among the battery pack effectively.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 2-5, fig. 2 is a schematic diagram illustrating an explosion structure of a detachable battery assembly according to an embodiment of the present invention; fig. 3 is a schematic cross-sectional view of a base according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a battery provided in an embodiment of the present invention; fig. 5 is a schematic cross-sectional view of a detachable battery assembly according to an embodiment of the present invention.

In some embodiments, a detachable battery assembly is provided, which mainly comprises a base 1 and a battery 3, wherein the base 1 is used as a mounting seat for the battery 3, and assembly connection is performed between the base 1 and the battery 3.

The base 1 and the battery 3 are locked together mainly by the locking shoulder 31 and the elastic locking projection 12, so that the two are kept in an assembled state. Specifically, in the battery 3 and the base 1: one is provided with a clamping shoulder 31, and the other is provided with an elastic clamping bulge 12 which can move elastically. It should be noted that, the battery 3 is matched with the base 1 through a plurality of sets of clamping shoulders 31 and elastic clamping protrusions 12, and the matching modes of the clamping shoulders 31 and the elastic clamping protrusions 12 may be the same or different, for example, the clamping shoulders 31 in one set are on the base 1, and the elastic clamping protrusions 12 are on the battery 3; the other group has a clamping shoulder 31 on the battery 3 and an elastic clamping projection 12 on the base 1.

When the battery 3 is loaded, the elastic clamping protrusions 12 can be pushed to move elastically to be away so that the battery 3 is assembled to a preset position, namely, the battery is assembled in place. And when the battery 3 is assembled to a predetermined position, that is, assembled in place, the elastic locking projection 12 abuts against the locking shoulder 31 to prevent the battery 3 from moving in a direction of being removed from the assembly. Wherein the battery 3 is guided into the base 1, when the battery 3 is loaded into the base 1, the upper structure of the battery 3 will push against the elastic clamping projection 12, because the elastic clamping projection 12 can move elastically, and as the pushing force increases, the elastic clamping projection 12 starts to move elastically, so that the battery 3 can be loaded continuously. After the battery 3 is put in place, the elastic clamping protrusion 12 is no longer structurally constrained, so that the elastic clamping protrusion 12 starts to reset under the action of deformation force. After reset, it will abut against the shoulder 31 in the direction of loading the battery 3, so that the battery 3 will be subjected to an inward restraining force, and the battery 3 will be prevented from being detached.

When the battery 3 is assembled, the battery 3 only needs to be directly installed in the base 1, the whole process only needs to be pressed, and the assembly is convenient and simple.

In some embodiments, a detachable battery assembly is provided, which mainly comprises a base 1, a battery 3 and a key 2. Wherein the base 1 has a placement groove 11, the key 2 is used for being loaded into the placement groove 11 from the notch of the placement groove 11, and the battery 3 seals the notch of the placement groove 11 to restrain the key 2 therein to complete the final assembly. In assembling, the key 2 may be first fitted into the placement groove 11 and then the battery 3 may be fitted, or the battery 3 and the key 2 may be fitted at the same time to complete the assembly. In the above-mentioned installation relation, the battery 3 and the base 1 form a box structure to limit the key 2, so the assembly relation between the battery 3 and the base 1 is mainly for the key 2 to be installed in the base 1. The key 2 is mainly used for operating the detachability of the detachable battery pack.

And the battery 3 and the base 1 are matched through the guide structure along the notch direction of the placing groove 11, so as to be placed into the placing groove 11 along the guide direction, namely, the loading direction of the battery 3 is the notch direction of the placing groove 11, and when the battery is assembled in the direction, the guide structure 5 guides, so that when the assembly is completed, under the constraint of the guide structure, the battery 3 and the base 1 cannot move relatively in the direction perpendicular to the notch direction of the placing groove 11, and the battery 3 is generally prevented from being further inserted through the abutting structure 6 or the abutting device in the deep groove of the placing groove 11.

Wherein, the battery 3 is connected with the base 1 through the clamp shoulder 31 and the elastic clamp projection 12 in a butt mode, so that the battery 3 is prevented from being loaded into the placing groove 11 and being separated from the placing groove 11, and when the battery is loaded, the battery can be avoided due to the elastic movement of the elastic clamp projection 12. The specific direction of the locking shoulder 31 and the elastic locking protrusion 12 is as described in the above embodiments. Specifically, in battery 3 and base 1: one is provided with a clamping shoulder 31, the other is provided with an elastic clamping bulge 12 which can move elastically, when the battery 3 is loaded, the elastic clamping bulge 12 can be pushed to move elastically to make the battery 3 assemble to a preset position, and when the battery 3 is assembled to the preset position, the elastic clamping bulge 12 and the clamping shoulder 31 are abutted along the direction of the notch of the placing groove 11.

When the detachable battery assembly is used, the key 2 and the battery 3 can be assembled first, or the key 2 and the battery 3 can be assembled first and then assembled into the base 1 together, and in any mode, after the battery 3 is assembled, the key 2 can be correspondingly installed. And the packing into of battery 3 is through guide structure direct guide insertion, then under the spacing of elasticity card protruding 12, presses, impels elasticity card protruding 12 elastic deformation to make battery 3 can continuously pack into, after packing into in place, can form the breach in card shoulder 31 department, so that elasticity card protruding 12 can reset, and on the butt card shoulder 31 when resetting, prevent through butt power that battery 3 breaks away from standing groove 11. In the above-mentioned detachable battery pack, considering the assembly between the base 1 and the battery 3, the main purpose is to assemble the key 2, therefore, the separation state of the base 1 and the battery 3 is usually before the assembly of the product, but after the installation of the above-mentioned shoulder 31 and the elastic lug 12, although it is very difficult to separate, because the assembly is completed and then the separation is not needed, the separation is difficult, and the later use will not be affected. But when the equipment, the operation is very convenient simple, only need simply press, can accomplish the installation. Compared with gluing, welding, screw connection and other modes, the assembling mode is very simple and convenient. To sum up, this detachable battery pack can solve the problem that the connection effect is not good between base and the battery among the battery pack effectively.

In some embodiments, after the assembly is completed, the elastic locking protrusion 12 and the locking shoulder 31 may be both located in the placing groove 11 and encapsulated in the placing groove 11, and because the placing groove 11 and the battery 3 are both rigid structures, the elastic locking protrusion 12 cannot be separated from the locking shoulder 31 without elastic deformation due to self deformation, so that the base 1 and the battery 3 can be stably kept in a fixed relationship, and the assembly requirement is further met. Wherein the hard structure is plastic steel, high-hardness plastic, high-hardness steel, cast iron, etc.

In some embodiments, the base 1 may have a resilient protrusion 12, and the resilient protrusion 12 is disposed on the placement slot 11, i.e. directly or indirectly connected to the bottom or the slot wall of the placement slot 11. Correspondingly, the battery 3 may have a clamping shoulder 31, and it should be noted that the clamping shoulder 31 may be a non-movable shoulder or a resiliently movable shoulder, and in this case, the same or similar structure as the resilient clamping protrusion 12 may be adopted. The abutment surface 14 of the resilient catch projection 12 is now facing the bottom of the recess 11, whereas the shoulder surface 32 of the catch shoulder 31 is facing the recess 11.

Specifically, one end of the elastic clamping projection 12 may be fixed in the groove of the placing groove 11 through the fixing arm 13, and the other end of the elastic clamping projection 12 has an abutting surface 14 facing the bottom of the placing groove 11, and the abutting surface 14 abuts against the shoulder surface 32 of the clamping shoulder 31. Wherein the elastic clamping projection 12 can utilize the elastic performance of the self extending part to realize elastic movement, even if the abutting surface 14 can move along the direction vertical to the direction of the notch of the placing groove 11; the connection between the elastic clamping protrusion 12 and the fixing arm 13 can be realized by an elastic structure, wherein the connection can be bent into an arc, a V-shaped or a U-shaped structure, so that the included angle between the two ends can be elastically changed.

In some embodiments, the base 1 and the battery 3 can be clamped together by a set of clamping shoulders 31 and elastic clamping protrusions 12, that is, on one side of the battery 3, the clamping shoulders 31 and elastic clamping protrusions 12 are clamped together, but one side is stressed to cause instability. For this purpose, it is preferred that the placement groove 11 therein has two elastic snap projections 12 arranged in mirror symmetry for abutting against the snap shoulders 31 on both sides of the battery 3. Namely, the clamping connection can be realized at both sides of the battery 3 through the elastic clamping protrusions 12 and the clamping shoulders 31, so that the connection stability is ensured.

In some embodiments, the fixing arm 13 may be connected to the groove wall of the placement groove 11, but such a structure is not beneficial for the elastic movement of the elastic clamping protrusion 12, and based on this, it is preferable that one end of the fixing arm 13 is connected to the groove bottom of the placement groove 11, and the other end of the fixing arm 13 is connected to one end of the elastic clamping protrusion 12 to form a U-shaped structure 15 which is opened towards the groove bottom of the placement groove 11, wherein the U-shaped structure 15 is easy to generate torsional elastic deformation. At this time, a relief gap 16 is formed between the elastic lug 12 and the fixed arm 13 so that the elastic lug 12 can elastically move toward the fixed arm 13.

In some embodiments, the elastic snap projection 12 and/or the snap shoulder 31 may be provided with a guide surface for guiding the elastic snap projection 12 to move elastically when the battery 3 is loaded. Specifically, the first guiding surface 17 may be disposed on the side of the elastic latch 12 facing the notch of the placing slot 11, and/or the second guiding surface 33 may be disposed at the latch shoulder 31 facing the bottom of the placing slot 11, wherein the first guiding surface 17 may make the elastic latch 12 receive a lateral component force to force the elastic latch 12 to move elastically in the direction of the fixing arm 13 when the battery 3 is loaded. When the second guide surface 33 is stressed, the elastic clamping protrusion 12 is guided to move outwards gradually, so that the pressing force required when the battery 3 is installed is reduced. The guide surface is generally an inclined surface that is disposed obliquely to the battery 3 loading direction, and is generally an inclined plane.

In some embodiments, the fixing arm 13 may have a supporting arm 18 between the groove wall of the placement groove 11 to provide better support for the fixing arm 13. Wherein the support arm 18 may be a rib structure or a block structure. The fixing arm 13 may be a planar vertical plate, which is disposed in parallel with the groove wall of the placing groove 11 near the planar vertical plate, and the supporting arm 18 is disposed therebetween, wherein the supporting arm 18 may be block-shaped or plate-shaped, and when being plate-shaped, the supporting arm 18 is disposed perpendicular to the fixing arm 13.

In some embodiments, the battery 3 is assembled to the predetermined position, and the abutting portion of the shoulder 31 against the elastic lug 12 may be biased toward the battery 3 than the bent portion of the elastic lug 12. So that when the battery 3 is pulled outwards, the acting force between the clamping shoulder 31 and the elastic clamping projection 12 is increased, the elastic clamping projection 12 is under the acting force, the bending part of the elastic clamping projection (12) is equivalent to a fulcrum, and the acting force is deviated towards the battery 3 relative to the fulcrum, so that a moment is formed, and the moment forces the elastic clamping projection 12 to bend away from the fixed arm 13, namely to move towards the battery 3. As shown in fig. 5, the elastic lug 12 has one end of the abutting surface 14, and a convex portion is formed to protrude in a direction away from the fixed arm 13, so that a portion where the shoulder 31 abuts against the abutting surface 14 is deviated in a direction away from the fixed arm 13 as compared with a bent portion of the elastic lug 12, and is close to the battery 3. It should be noted that in this embodiment, the fixing arm 13 is not elastically deformed. Specifically, the elastic clamping projection 12 may have a first locking surface 20 on a side close to the battery 3, and the battery 3 may have a corresponding second locking surface 39 to prevent the elastic clamping projection 12 from moving away from the fixing arm 13, so as to be stabilized at the current position. In the predetermined position, the first locking surface 20 and the second locking surface 39 are not suitable to be arranged in a contact manner, so that the installation is not in place, and preferably, a gap exists between the first locking surface and the second locking surface, but the gap is not suitable to be too large, and the gap can cause looseness. Such as a gap between 0.1 mm and 0.15 mm.

In some embodiments, it is considered that, in rare cases, the battery 3 may need to be pulled out, and an external force is needed to urge the elastic clamping projection 12 to move elastically to disengage from the clamping shoulder 31. The hard pull-out may cause damage to the resilient latch 12, but the resilient latch 12 is not operable because it is entirely closed. Based on this, when the battery 3 includes the plate portion 34 fitted in the placement groove 11, the through hole 35 aligned with the elastic click projection 12 in the height direction may be opened in the plate portion 34 thereof, so that the bar member passing through the through hole 35 can push the elastic click projection 12 to move elastically. The through hole 35 may be included at the time of product shipment, or the through hole 35 may be drilled by a drilling tool or the like when the battery 3 needs to be pulled out at a later stage. When the operation is performed, the rod piece with sufficient strength and capable of penetrating into the through hole 35 is selected, because a certain gap is formed between the U-shaped structure 15 and the battery 3, so that the rod piece can enter between the U-shaped structure and the battery 3, the rod piece can push the elastic clamping protrusion 12 to move by utilizing the lever principle, or push the elastic clamping protrusion 12 to move elastically when the rod piece is pressed down by means of the first guide surface 17 on the elastic clamping protrusion 12.

In some embodiments, each corner of the placement groove 11 may have a guide portion, and the guide portion may be engaged with the battery 3 through a hole for guiding. Specifically, for example, the four corners of the placement groove 11 are each provided with a guide post, the hole in the guide post is the guide hole 19, and the plate portion 34 of the battery 3 is provided with a guide post 36 that fits in the guide hole 19.

In some embodiments, the base 1 may have a square-shaped placing slot 11, one set of opposing side walls of the placing slot 11 is opened with an opening for the key portion of the key 2 to protrude, another set of opposing side walls of the placing slot 11 is respectively provided with an elastic clamping protrusion 12, the battery 3 has an abutting portion 37 at the inner side of the plate portion 34, an elastic member 4 is disposed between the key 2 and the abutting portion 37, wherein the abutting portion 37 has a mounting groove matched with the end of the elastic member 4, and the elastic member 4 is an elastic body or a spring. Wherein the external clamping protrusion 21 of the key 2 penetrates out of the placing groove 11 from the upper groove of the plate part 34 to realize clamping with other structures so as to complete the assembly, and the key 2 can be separated from the clamping to be disassembled when being pushed.

The shoulder 31 may be formed on both side surfaces of the abutting portion 37, or an inward extending structure 38 may be provided inside the plate portion 34, and the shoulder 31 and the second guide surface 33 are formed at the inner end of the inward extending structure 38, that is, the end close to the bottom of the placing groove 11.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A detachable battery assembly comprises a base (1), a battery (3) and a key (2), wherein the base (1) is provided with a placing groove (11), the key (2) is used for being loaded into the placing groove (11) from a notch of the placing groove (11), the battery (3) blocks the notch of the placing groove (11), and the detachable battery assembly is characterized in that the battery (3) is matched with the base (1) along the notch direction of the placing groove (11) through a guide structure (5) so as to be loaded into the placing groove (11) along the guide direction; the battery (3) and the base (1) are arranged such that: one is provided with card shoulder (31), and another is provided with elasticity card protruding (12) that can elastic activity battery (3) can promote when packing into elasticity card protruding (12) elastic activity is in order to make battery (3) assemble to preset position, and battery (3) assemble extremely preset position, elasticity card protruding (12) are followed with card shoulder (31) standing groove (11) notch direction offsets.

2. The removable battery pack according to claim 1, wherein the resilient catch (12) is arranged in the placement groove (11), the battery (3) having the catch shoulder (31); one end of the elastic clamping protrusion (12) is fixed in the groove of the placing groove (11) through a fixing arm (13), the other end of the elastic clamping protrusion (12) is provided with an abutting surface (14) facing the bottom of the placing groove (11), and the abutting surface (14) abuts against a shoulder surface (32) of the clamping shoulder (31).

3. The removable battery pack of claim 2, wherein the placement slot (11) has two elastic clamping protrusions (12) arranged in a mirror symmetry manner for abutting against clamping shoulders (31) on two sides of the battery (3).

4. The detachable battery pack according to claim 3, wherein one end of the fixing arm (13) is connected to the bottom of the groove (11), the other end of the fixing arm (13) is connected to one end of the elastic locking protrusion (12) to form a U-shaped structure (15) with an opening facing the bottom of the groove (11), and a gap is formed between the elastic locking protrusion (12) and the fixing arm (13) to allow the elastic locking protrusion (12) to elastically move towards the fixing arm (13).

5. The removable battery pack according to claim 4, characterized in that the resilient snap (12) and/or the snap shoulder (31) is provided with a guide surface for guiding the resilient snap (12) to move resiliently when the battery (3) is loaded.

6. The removable battery pack according to claim 5, characterized in that between the fixed arm (13) and the wall of the placement channel (11) there is a support arm (18).

7. The removable battery pack of claim 6, wherein when the battery (3) is assembled to the predetermined position, the abutting portion of the shoulder (31) against the elastic lug (12) is biased toward the battery (3) than the bending portion of the elastic lug (12), so that when the battery moves away from the base (1), the elastic lug (12) moves toward the battery (3).

8. The removable battery pack according to any of claims 1 to 7, wherein the battery (3) comprises a plate portion (34) fitted in the placement groove (11), the plate portion (34) being provided with a through hole (35) aligned in the height direction with the elastic lug (12) so that a lever passing through the through hole (35) can push the elastic lug (12) to move elastically.

9. The removable battery pack according to claim 8, characterized in that each corner of the placement groove (11) has the guide structure (5), and the guide structure (5) and the battery (3) are guided by the matching guide hole (19) and guide post (36).

10. The detachable battery assembly according to claim 9, wherein the base (1) has a square placement groove (11), one set of opposing side walls of the placement groove (11) is provided with an opening for extending the key portion of the key (2), the other set of opposing side walls of the placement groove (11) are respectively provided with the elastic locking protrusion (12), the battery (3) has an abutting portion (37) on the inner side of the plate portion (34), an elastic member (4) is arranged between the key (2) and the abutting portion (37), and the external locking protrusion (21) of the key (2) passes through the placement groove (11) from the plate portion (34).

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