CN213278301U - Battery module - Google Patents

Abstract

The utility model provides a battery module, which comprises a shell and at least one battery pack, wherein a containing cavity is arranged in the shell, the battery pack is detachably arranged in the containing cavity, and two opposite sides of the battery pack are provided with first locking parts; second locking parts are installed on the inner side walls of two opposite sides of the accommodating cavity, and under the condition that the battery pack is installed in the accommodating cavity, the first locking parts can be locked with the second locking parts so that the battery pack is locked in the accommodating cavity; the second locking portion includes a control portion having a first position at which the first locking portion and the second locking portion are locked, and a second position at which the first locking portion and the second locking portion are unlocked. The utility model discloses can take out the group battery alone, and can effectively solve the problem of changing the inconvenient dismouting of group battery in-process among the prior art.

Description

Battery module

Technical Field

The utility model relates to a battery equipment technical field particularly, relates to a battery module.

Background

The power battery retired from the electric automobile generally has a residual capacity of 60-80% of an initial capacity and a certain service life.

There are currently two main possible treatment methods: one is echelon utilization, namely, the retired power battery is used as a carrier of electric energy in other fields such as energy storage and the like, so that the residual value is fully exerted; and secondly, disassembly and recovery, namely discharging and disassembling the retired battery and refining raw materials, so that cyclic utilization is realized. No matter the batteries are recycled in a echelon way or disassembled, the original battery module is inevitably required to be disassembled.

In addition, when a part of batteries in the battery module have a fault, the battery module also needs to be disassembled, so that the battery module convenient to disassemble is very important.

The battery module of prior art for conveniently disassembling to cylinder battery adopts the stay bolt most to link a plurality of groups of batteries and the end plate that is used for fixed battery module that is located a plurality of groups of batteries both ends as an organic whole, and its shortcoming is: each battery pack is connected through four long bolt rods, and when a battery in one battery pack goes wrong, the whole battery module must be disassembled, and the bolts need to be screwed, so that the battery pack is inconvenient to install and disassemble.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a battery module, in order to solve the problem that the battery module in the prior art is difficult to disassemble.

In order to achieve the purpose, the utility model provides a battery module, which comprises a shell and at least one battery pack, wherein a containing cavity is arranged inside the shell, the battery pack is detachably arranged in the containing cavity, and two opposite sides of the battery pack are respectively provided with a first locking part; second locking parts are installed on the inner side walls of two opposite sides of the accommodating cavity, and under the condition that the battery pack is installed in the accommodating cavity, the first locking parts can be locked with the second locking parts so that the battery pack is locked in the accommodating cavity; the second locking portion includes a control portion having a first position at which the first locking portion and the second locking portion are locked, and a second position at which the first locking portion and the second locking portion are unlocked.

Further, all be provided with the fixed plate on the inside wall of the relative both sides in chamber that holds, the second sticking department setting is on the fixed plate, and first locking portion includes the locked groove, and the second sticking department includes the spring bolt, and control unit can drive the spring bolt and stretch into in the locked groove to make first locking portion and second sticking department locking.

Furthermore, a plurality of guide convex strips are arranged on the fixed plate, the guide convex strips extend towards the bottom of the shell, and a first slot is formed between every two adjacent guide convex strips; the first locking portion comprises an inserting convex portion, the inserting convex portion is inserted into the first inserting groove, and the locking groove is formed in the inserting convex portion.

Further, the top of direction sand grip is provided with the breach, and the spring bolt can swing ground and set up in the breach, and the lower part of spring bolt is provided with the bellied joint convex part of orientation locked groove, and the joint convex part can stretch into to the locked groove to make first locking portion and second locking portion locking.

Further, the control part comprises a lock cylinder, the lock cylinder is rotatably arranged on the fixing plate, the bottom of the lock cylinder is provided with an inserting part, and the inserting part can be inserted into the notch to drive the lock tongue to be inserted into the lock groove.

Furthermore, the upper portion of the spring bolt is connected with the fixed plate, one side of the spring bolt, which is far away from the lock groove, is provided with a limiting concave portion, one side of the insertion part, which is close to the spring bolt, is provided with a limiting protrusion, and under the condition that the control part is in the first position, the limiting protrusion extends into the limiting concave portion.

Furthermore, the second locking part also comprises a limiting convex part which protrudes towards the inside of the accommodating cavity, and the limiting convex part is arranged on the fixing plate and is positioned at the upper part of the gap; the upper part of the lock cylinder is provided with a limiting groove, and the limiting convex part is clamped in the limiting groove under the condition that the control part is at the first position

Furthermore, the upper end of the fixing plate is provided with a yielding groove, one end of the limiting convex part is connected with the inner side wall of the yielding groove, and the other end of the limiting convex part is suspended in the yielding groove.

Furthermore, the lock core also comprises a connecting part and a power assisting part, wherein one end of the connecting part is connected with the inserting part, and the other end of the connecting part is connected with the top of the guide convex strip; the helping hand portion sets up the one end of keeping away from connecting portion at grafting portion, and spacing recess sets up between connecting portion and helping hand portion.

Furthermore, the second locking parts and the fixing plate are integrally formed, the number of battery packs is multiple, the plurality of battery packs are arranged side by side, the first locking parts and the second locking parts are multiple groups, and the multiple groups of first locking parts and the multiple groups of second locking parts are arranged in a one-to-one correspondence manner; the shell comprises a bottom plate, two flanges arranged on two sides of the bottom plate and extending in the same direction, and end plates arranged at two ends of the bottom plate, wherein the two fixed plates are respectively arranged on the inner walls of the two flanges; the second locking part is arranged at one end of the fixing plate far away from the bottom plate; two opposite sides of the end plate are provided with first folded edges which are parallel to the turned edges, and the two first folded edges are respectively connected with the two turned edges; and a second folding edge is arranged between the two first folding edges, is parallel to the bottom plate and is connected with the bottom plate.

Use the technical scheme of the utility model, the utility model discloses an install the group battery and hold the intracavity, when needs locking for hold the second sticking department on the inside wall of the relative both sides in chamber, with the cooperation of the first locking department of the relative both sides of group battery, and remove the control part to the first position, in order to reach the purpose of locking the group battery, when needs take out the group battery, remove the second position with the control part, make first locking department and second sticking department unblock each other, the utility model discloses can take out the group battery alone, and can effectively solve the problem of changing the inconvenient dismouting of group battery in-process among the prior art.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 schematically shows an exploded view of an embodiment of a battery module of the present invention;

fig. 2 schematically shows a partial block diagram of an embodiment of the fixing plate and the second locking portion of the present invention;

fig. 3 is a partial block diagram schematically illustrating an embodiment of the present invention when the first locking portion is locked with the second locking portion;

wherein the figures include the following reference numerals:

1. a housing; 11. a fixing plate; 111. a first slot; 112. a guide convex strip; 113. a latch bolt; 1131. a limiting concave part; 1132. clamping the convex part; 114. a lock cylinder; 1141. a plug-in part; 1142. a limiting groove; 1143. a limiting bulge; 1144. a connecting portion; 1145. a booster section; 115. a limiting convex part; 116. a notch; 12. a base plate; 122. flanging; 13. an end plate; 2. a battery pack; 21. inserting the convex part; 22. and (4) locking the groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As noted in the background, there are currently two main possible treatment methods: one is echelon utilization, namely, the retired power battery is used as a carrier of electric energy in other fields such as energy storage and the like, so that the residual value is fully exerted; and secondly, disassembly and recovery, namely discharging and disassembling the retired battery and refining raw materials, so that cyclic utilization is realized. No matter the batteries are recycled in a echelon way or disassembled, the original battery module is inevitably required to be disassembled. In addition, when a part of batteries in the battery module have a fault, the battery module also needs to be disassembled, so that the battery module convenient to disassemble is very important. The battery module of prior art for conveniently disassembling to cylinder battery adopts the stay bolt most to link a plurality of groups of batteries and the end plate that is used for fixed battery module that is located a plurality of groups of batteries both ends as an organic whole, and its shortcoming is: each battery pack is connected through four long bolt rods, and when a battery in one battery pack goes wrong, the whole battery module must be disassembled, and the bolts need to be screwed, so that the battery pack is inconvenient to install and disassemble.

In order to solve the above problem, referring to fig. 1 to 3, an embodiment of the present invention provides a battery module, which includes a housing 1 and at least one battery pack 2, wherein a receiving cavity is disposed inside the housing 1, the battery pack 2 is detachably mounted in the receiving cavity, and first locking portions are disposed on two opposite sides of the battery pack 2; second locking parts are installed on the inner side walls of two opposite sides of the accommodating cavity, and under the condition that the battery pack 2 is installed in the accommodating cavity, the first locking parts can be locked with the second locking parts so that the battery pack 2 is locked in the accommodating cavity; the second locking portion includes a control portion having a first position at which the first locking portion and the second locking portion are locked, and a second position at which the first locking portion and the second locking portion are unlocked. Wherein, group battery 2 can be one or more, the utility model discloses an install group battery 2 and hold the intracavity, when needs locking for hold the second sticking department on the inside wall of the relative both sides in chamber, with the cooperation of the first sticking department of the relative both sides of group battery 2, and remove the control part to the primary importance, in order to reach the purpose of locking group battery 2, when needs take out group battery 2, remove the control part to the secondary importance, make first sticking department and second sticking department unblock each other, the utility model discloses can take out group battery 2 alone, and can effectively solve the problem of changing the inconvenient dismouting of group battery 2 in-process among the prior art.

In the embodiment where the battery pack 2 is multiple, the first locking portions and the second locking portions are multiple groups, and the multiple groups of first locking portions and the multiple groups of second locking portions are arranged in one-to-one correspondence; wherein, the first locking portion in every group is located the relative both sides of a group battery 2, in this embodiment, can realize selectively replacing group battery 2, effectively solves the problem that can not independently change the group battery and inconvenient dismouting among the prior art. Wherein, a plurality of cylinder electric cores are arranged inside the battery pack 2.

In order to realize the matching locking between the first locking portion and the second locking portion, the fixing plates 11 are disposed on the inner side walls of the two opposite sides of the accommodating cavity in the embodiment, the second locking portion is disposed on the fixing plates 11, specifically, on the side wall of the fixing plate facing to one side of the accommodating cavity, the first locking portion includes the locking groove 22, the second locking portion includes the locking tongue 113, and the control portion can drive the locking tongue 113 to extend into the locking groove 22, so that the first locking portion and the second locking portion are locked. Specifically, the opening of the locking groove 22 faces the locking tongue 113, and the present embodiment can realize independent installation and replacement of the battery pack 2, and only the control portion needs to be moved, so that the assembly and disassembly are convenient, and preferably, for convenience of processing, the second locking portion and the fixing plate 11 are integrally injection-molded.

In order to ensure the smoothness of the battery pack 2 during the installation into the housing 1 and the removal from the housing 1, in the embodiment, specifically, the fixing plate 11 is provided with a plurality of guiding convex strips 112, the guiding convex strips 112 extend towards the bottom of the housing 1, and a first slot 111 is formed between two adjacent guiding convex strips 112; the first locking portion includes a plurality of insertion convex portions 21, the insertion convex portions 21 are parallel to the guide convex strips 112, the insertion convex portions 21 are inserted into the first insertion grooves 111, the locking grooves 22 are formed on the insertion convex portions 21, and in the embodiment where the insertion convex portions 21 are plural, the plurality of insertion convex portions 21 are inserted into the plurality of first insertion grooves 111 in a one-to-one correspondence. In the process of installing the battery pack 2 into the housing 1 or extracting the battery pack 2 from the housing 1, the first insertion groove 111 guides the insertion protrusion 21, so that the battery pack 2 is guided, thereby ensuring the smoothness of the battery pack 2 in the installation and extraction processes. Wherein, grafting convex part 21 can be the panel beating hem, also can be the working of plastics, and the bottom surface and the spring bolt 113 looks adaptation of locked groove 22, and the bottom surface of locked groove can be the plane, preferably the inclined plane, and this inclined plane inclines gradually along the direction towards spring bolt 113 to make spring bolt 113 change and get into the locked groove. In a preferred embodiment, the side of the fixing plate 11 is provided with a side plate, the side plate is parallel to the guide protrusion 112, and a first slot 111 is also formed between the side plate and the guide protrusion 112 adjacent to the side plate.

Specifically, the top of the guide protruding strip 112 in this embodiment is provided with a notch 116, the latch 113 is swingably disposed in the notch 116, the lower portion of the latch 113 is provided with a snap projection 1132 protruding toward the lock groove 22, and the snap projection 1132 can extend into the lock groove 22 to lock the first locking portion and the second locking portion. The notches form openings at the top of the guide convex strip 112 and the side facing the bolt 113, and when locking is needed, the bolt 113 is driven by the control part to generate certain elastic deformation and enter the locking groove 22 to realize locking; when unlocking, the control part leaves the bolt 113, the bolt 113 rebounds and resets, exits from the lock slot 22, and the unlocking is completed. Wherein, can be integrative injection moulding between spring bolt 113 and the fixed plate 11, also can be pin joint connection, in pin joint connection's embodiment, need set up the torsional spring in order to guarantee, spring bolt 113 can kick-back and reset during the unblock.

The control portion in this embodiment includes a lock core 114, the lock core 114 is rotatably disposed on the fixing plate 11, an insertion portion 1141 is disposed at the bottom of the lock core 114, and the insertion portion 1141 can be inserted into the notch 116, specifically, between the latch and the guiding protruding strip, so as to drive the latch 113 to be inserted into the lock slot 22. A second slot is formed between the guiding protruding strip and the bolt 113, when locking is required, the lock core 114 is pressed, so that the insertion part 1141 enters the second slot, and the bolt 113 is pressed to generate certain elastic deformation and enter the lock slot 22, so as to realize locking; when unlocking, the lock cylinder 114 is lifted, the insertion part 1141 is separated from the latch 113, the latch 113 rebounds and resets, and exits from the lock slot 22, and unlocking is completed.

Preferably, the upper portion of the latch 113 in this embodiment is connected to the inner side wall of the fixing plate 11, a limiting recess 1131 is disposed on a side of the latch 113 away from the locking groove 22, a limiting protrusion 1143 is disposed on a side of the insertion part 1141 close to the latch 113, and the limiting protrusion 1143 extends into the limiting recess 1131 when the control part is in the first position. Through the cooperation of spacing arch 1143 and spacing concave part 1131, when preventing to lock, take place relative movement between spring bolt 113 and grafting portion 1141, guarantee locking stability.

In order to further ensure that the first locking part and the second locking part are unlocked by mistake during locking, in particular to prevent the lock cylinder from withdrawing during vibration, the second locking part in the embodiment further comprises a limiting convex part 115 which protrudes towards the inside of the accommodating cavity, and the limiting convex part 115 is arranged on the fixing plate 11 and is positioned at the upper part of the gap 116; the upper portion of the lock cylinder 114 is provided with a limit groove 1142, and the limit protrusion 115 is clamped in the limit groove 1142 when the control part is at the first position. Through the cooperation of the limit convex part 115 and the limit groove 1142, the movement of the lock cylinder 114 is limited when locking is performed, and the locking stability is ensured.

In order to facilitate unlocking, the limiting convex part 115 has sufficient elastic movement, a yielding groove is formed in the upper end of the fixing plate 11 in the embodiment, one end of the limiting convex part 115 is connected with the inner side wall of the yielding groove, and the other end of the limiting convex part 115 is suspended in the yielding groove. When unlocking is required, the breakable limiting convex part 115 moves to avoid the lock core 114, and preferably, the abdicating groove is an arc groove.

In order to facilitate the user to press and lift the control portion, the key cylinder 114 in this embodiment further includes a connecting portion 1144 and a power assisting portion 1145, one end of the connecting portion 1144 is connected to the inserting portion 1141, and the other end of the connecting portion 1144 is connected to the top of the guiding protruding strip 112; the boosting part 1145 is disposed at an end of the inserting part 1141 away from the connecting part 1144, and the limiting groove 1142 is disposed between the connecting part 1144 and the boosting part 1145. The booster 1145 is a booster handle, and the control unit is moved by lifting and pressing the booster handle.

For convenience of processing, the second locking portion in this embodiment is integrally formed with the fixing plate 11, preferably, the second locking portion is integrally injection-molded, the battery pack is multiple, the multiple battery packs are arranged side by side, the first locking portion and the second locking portion are multiple, and the multiple first locking portions and the multiple second locking portions are arranged in one-to-one correspondence. In order to stably position the battery pack in the housing, the housing 1 includes a bottom plate 12, two flanges 122 disposed on two sides of the bottom plate 12 and extending in the same direction, and end plates 13 mounted on two ends of the bottom plate, the number of the fixing plates 11 is two, and the two fixing plates 11 are respectively mounted on inner walls of the two flanges 122; the second locking part is arranged at one end of the fixing plate 11 far away from the bottom plate 12; the extending direction of the end plate 13 is parallel to the extending direction of the battery pack 2, two opposite sides of the end plate 13 are provided with first folded edges, the first folded edges are parallel to the turned edges 122, and the two first folded edges are respectively connected with the two turned edges 122; a second folding edge is arranged between the two first folding edges, and the second folding edge is parallel to the bottom plate 12 and is connected with the bottom plate 12. In one embodiment, a first slot 111 is also formed between the end plate and the guiding rib 112 adjacent thereto.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model discloses an install the group battery and hold the intracavity, when needs locking for hold the second sticking department on the inside wall of the relative both sides in chamber, with the cooperation of the first locking portion of the relative both sides of group battery, and remove the control part to the first position, in order to reach the purpose of locking the group battery, when needs take out the group battery, remove the second position with the control part, make first locking portion and second sticking department unblock each other, the utility model discloses can take out the group battery alone, and can effectively solve the problem of the inconvenient dismouting of change group battery in-process among the prior art.

It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.

The present disclosure in accordance with certain embodiments described herein is not to be limited in scope by the specific aspects illustrated. As will be apparent to those skilled in the art, many modifications and variations are possible without departing from the spirit and scope of the disclosure. Functionally equivalent methods and apparatuses, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing description, within the scope of the present disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. The disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The battery module is characterized by comprising a shell (1) and at least one battery pack (2), wherein an accommodating cavity is formed in the shell (1), the battery pack (2) is detachably mounted in the accommodating cavity, and first locking parts are arranged on two opposite sides of the battery pack (2);

a second locking part is arranged on the inner side wall of the two opposite sides of the accommodating cavity, and the first locking part can be locked with the second locking part under the condition that the battery pack (2) is arranged in the accommodating cavity so as to lock the battery pack (2) in the accommodating cavity;

the second locking portion includes a control portion having a first position at which the first locking portion and the second locking portion are locked, and a second position at which the first locking portion and the second locking portion are unlocked.

2. The battery module according to claim 1, wherein a fixing plate (11) is disposed on inner side walls of two opposite sides of the accommodating cavity, the second locking portion is disposed on the fixing plate (11), the first locking portion comprises a locking groove (22), the second locking portion comprises a locking tongue (113), and the control portion can drive the locking tongue (113) to extend into the locking groove (22) so as to lock the first locking portion and the second locking portion.

3. The battery module according to claim 2, wherein the fixing plate (11) is provided with a plurality of guiding ribs (112), the guiding ribs (112) extend towards the bottom of the housing (1), and a first slot (111) is formed between two adjacent guiding ribs (112); the first locking portion comprises a plug convex portion (21), the plug convex portion (21) is plugged in the first slot (111), and the lock groove (22) is formed in the plug convex portion (21).

4. The battery module according to claim 3, wherein a notch (116) is formed in the top of the guide rib (112), the latch tongue (113) is swingably disposed in the notch (116), a clamping protrusion (1132) protruding toward the lock groove (22) is disposed on the lower portion of the latch tongue (113), and the clamping protrusion (1132) can extend into the lock groove (22) to lock the first locking portion and the second locking portion.

5. The battery module according to claim 4, wherein the control part comprises a lock cylinder (114), the lock cylinder (114) is rotatably disposed on the fixing plate (11), and a plug-in part (1141) is disposed at the bottom of the lock cylinder (114), and the plug-in part (1141) can be inserted into the notch (116) to drive the latch bolt (113) to be inserted into the lock groove (22).

6. The battery module according to claim 5, wherein the upper portion of the latch (113) is connected to the inner side wall of the fixing plate (11), a limiting recess (1131) is disposed on a side of the latch (113) away from the locking groove (22), a limiting protrusion (1143) is disposed on a side of the insertion part (1141) close to the latch (113), and the limiting protrusion (1143) extends into the limiting recess (1131) when the control part is in the first position.

7. The battery module according to claim 5, wherein the second locking portion further comprises a stopper protrusion (115) protruding toward the inside of the accommodation chamber, the stopper protrusion (115) being provided on the fixing plate (11) and located at an upper portion of the notch (116); the upper portion of lock core (114) is provided with spacing recess (1142), and under the condition that the control part is in the first position, spacing convex part (115) joint in spacing recess (1142).

8. The battery module according to claim 7, wherein the upper end of the fixing plate (11) is provided with a recess, one end of the limiting convex part (115) is connected with the inner side wall of the recess, and the other end of the limiting convex part (115) is suspended in the recess.

9. The battery module according to claim 7, wherein the key cylinder (114) further comprises a connecting portion (1144) and a boosting portion (1145), one end of the connecting portion (1144) is connected to the insertion portion (1141), and the other end of the connecting portion (1144) is connected to the top of the guide rib (112); the power assisting part (1145) is arranged at one end, far away from the connecting part (1144), of the inserting part (1141), and the limiting groove (1142) is arranged between the connecting part (1144) and the power assisting part (1145).

10. The battery module according to claim 2, wherein the second locking portion is integrally formed with the fixing plate (11), the number of battery packs is plural, the plural battery packs are arranged side by side, the first locking portion and the second locking portion are plural sets, and the plural sets of the first locking portion and the plural sets of the second locking portion are arranged in one-to-one correspondence;

the shell (1) comprises a bottom plate (12), two flanges (122) arranged on two sides of the bottom plate (12) and extending in the same direction, and end plates (13) arranged at two ends of the bottom plate, wherein the number of the fixed plates (11) is two, and the two fixed plates (11) are respectively arranged on the inner walls of the two flanges (122);

the second locking part is arranged at one end of the fixing plate (11) far away from the bottom plate (12); two opposite sides of the end plate (13) are provided with first folded edges which are parallel to the turned edges (122), and the two first folded edges are respectively connected with the two turned edges (122); and a second folding edge is arranged between the two first folding edges, is parallel to the bottom plate (12) and is connected with the bottom plate (12).

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