CN114843692A

CN114843692A - Large capacity lithium cell group

Info

Publication number: CN114843692A
Application number: CN202210637028.0A
Authority: CN
Inventors: 田洪友; 周帮; 傅伟珊
Original assignee: Fujian Eu Qian New Energy Technology Co ltd
Current assignee: Fujian Eu Qian New Energy Technology Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-08-02

Abstract

The invention discloses a high-capacity lithium battery pack which comprises a battery shell, a battery pack and fixed outer modules, wherein each fixed outer module is arranged in the battery shell, the high-capacity lithium battery pack also comprises a placing seat used for bearing the fixed outer modules, the outer wall of the lower side of each fixed outer module is provided with a connecting component and a pressing plate respectively, the pressing plates act on the connecting components, and when the fixed outer modules are placed, a fixed outer die extrudes the pressing plates and acts on the connecting components, so that two adjacent fixed outer modules are connected through the connecting components. According to the high-capacity lithium battery pack provided by the invention, the adjacent placing seats are connected and installed, the transverse stability among the battery packs is improved, the shaking of the battery packs is reduced, and the service life is integrally prolonged.

Description

Large-capacity lithium battery pack

Technical Field

The invention relates to the technical field of new energy batteries, in particular to a high-capacity lithium battery pack.

Background

In recent years, in order to reduce the emission of automobile exhaust, a green and environment-friendly trip has been vigorously advocated, and it is known that the core power energy of a new energy automobile is a battery pack, and the battery pack is formed by placing individual batteries in a battery shell to be connected in series, and then forming a lithium battery, which is mainly used for providing driving power for the new energy automobile, and then in the installation process, each lithium battery pack is connected in series to form a large-capacity lithium battery pack, and then is installed on an automobile bottom shell;

for example, the granted publication number "CN 107599814B" is a chinese patent named "a shock absorption battery cell box applied to new energy vehicles", and the patent can buffer the battery cells in the battery cell box through the corresponding structure, so as to have the effect of preventing the battery cells from being vibrated.

The weak point of prior art lies in, specifically when installing each lithium cell, among the prior art, generally all place the device directly on the casing, then the spacing ring of top through setting up of the casing of lithium cell fastens to the position of fixed each lithium cell, but this kind of fixed mode for still there is the condition of transverse collision between the adjacent lithium cell, when taking place the ascending collision in horizontal direction, can cause the friction and collision of lithium cell, causes the damage to the lithium cell.

Disclosure of Invention

The invention aims to provide a high-capacity lithium battery pack to overcome the defects in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides a large capacity lithium cell group, includes a battery case, group battery and is used for placing the fixed outer module of group battery, each fixed outer module sets up respectively in the battery case, still including placing the seat, and it is used for bearing fixed outer module, be provided with connecting elements and holding down plate on the downside outer wall of fixed outer module respectively, the holding down plate acts on connecting elements is placing when fixed outer module, fixed external mold extrusion holding down plate acts on connecting elements, makes adjacent two fixed outer module is connected through connecting elements.

Preferably, one end of the pressing plate is hinged to the placing seat, the other end of the pressing plate is movably connected to the connecting component, and when the battery pack is clamped in the battery seat, the pressing plate is squeezed, so that the pressing plate abuts against the connecting component, and the connecting component protrudes out of the placing seat.

Preferably, the connecting member comprises a connecting rod arranged on the placing seat in a sliding manner, a first lock catch and a second lock catch are arranged on the connecting rod, and the second lock catch can be inserted into a locking groove formed in the adjacent first lock catch; to connect two adjacent placing seats.

Preferably, an inclined plane is arranged on one side wall of the second lock catch, and an inclined groove surface adaptive to the inclined plane is arranged in the locking groove; one side of the second lock catch is provided with an elastic piece, under the elastic force of the elastic piece, the second lock catch can be inserted into a locking groove formed in the first lock catch, and an inclined plane on the second lock catch is enabled to abut against an inclined groove surface of the locking groove.

Preferably, the fixing device further comprises a plug board inserted between two adjacent placing seats, a plurality of heat dissipation holes are formed in the plug board, and the upper portion of the plug board is connected to the fixed outer module.

As preferred, the inserting groove has been seted up on the connecting rod, still be provided with in the inserting groove and support tight subassembly, just the pegboard below is fixed to be provided with the grafting piece, just the grafting piece can be pegged graft to in the inserting groove, and at the in-process of pegging graft: the plug board can tightly support the second lock catch through the supporting component.

Preferably, the abutting assembly comprises a pull column fixedly arranged at one end of the second lock catch and a shift lever rotatably arranged on the pull column, the shift lever is positioned in the insertion groove, and when the insertion block is inserted into the insertion groove, the insertion plate extrudes the shift lever and abuts against the pull column through the shift lever so as to abut against the second lock catch.

Preferably, the bottom of the insertion block is provided with an elastic column, the elastic column can stretch out and draw back towards the insertion block, the elastic column can stretch out and draw back along the long edge direction of the insertion block, a locking position is formed between the elastic column and the insertion block, and after the insertion block is inserted in place, the shifting lever is located at the locking position.

Preferably, a supporting column is fixedly arranged in the inserting groove, a convex block arranged on the shifting lever abuts against the supporting column, and in the process that the inserting block is separated from the inserting groove, the shifting lever can be driven to rotate along a shaft, in which the convex block is in contact with the supporting column, through the limitation of the elastic column, so as to pull the pull column and the second lock catch to contract inwards.

Preferably, the driving lever is rotatably provided with a supporting rod, one end of the supporting rod is fixedly provided with a shifting block, and in the process that the inserting block is separated from the inserting groove, the elastic column is abutted against the shifting block and drives the shifting block and the supporting rod to rotate and open so as to be supported on the inner side wall of the connecting rod.

In the technical scheme, the high-capacity lithium battery pack provided by the invention has the beneficial effects that:

according to the invention, the connecting members are arranged on the bottom sides of the placing seats, and then the adjacent placing seats can be connected through the arranged connecting members, and the connecting members can be automatically connected and installed in the processes of installing the battery packs and fixing the outer modules, namely, the adjacent placing seats are connected and installed, so that the transverse stability of each battery pack is improved, the shaking of the battery packs is reduced, the service life of the whole battery pack is prolonged, in addition, the connecting members can be automatically triggered to be connected in the process of installing the battery packs, namely, the installation time of the connecting members can be saved, and the installation efficiency of the connecting members is greatly improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural diagram of a battery case according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a placing seat and a pressing plate according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a pressing plate and a connection structure according to an embodiment of the present invention;

fig. 4 is a schematic structural view of two adjacent connecting rods engaged with each other according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a socket board and a heat dissipation hole according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a socket board and a socket block according to an embodiment of the present invention;

FIG. 7 is an enlarged schematic view of a portion A according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a connecting rod, a second locking device and a collision component according to an embodiment of the present invention;

fig. 9 is a schematic cross-sectional view illustrating a structure of two adjacent connecting rods engaged with each other according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a connecting rod supporting post and a shift lever according to an embodiment of the present invention;

FIG. 11 is a schematic structural view illustrating a supporting rod abutting against an inner wall of a slot according to an embodiment of the present invention;

FIG. 12 is a diagram of a shifter lever according to an embodiment of the present invention; the structure schematic diagram of bracing piece and shifting block.

Description of reference numerals:

1. a battery case; 11. fixing the outer module; 12. a battery pack; 13. a placing seat; 2. pressing the plate tightly; 21. connecting blocks; 3. a connecting rod; 31. a first lock catch; 32. a second lock catch; 33. a support pillar; 34. a deflector rod; 341. a support bar; 301. inserting grooves; 302. a locking groove; 4. a plugboard; 401. heat dissipation holes; 41. an insertion block; 42. an elastic column; 4101. a locked position; 321. an elastic member; 322. pulling the column; 3411. and (5) shifting blocks.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Referring to fig. 1-12, including a battery case 1, a battery pack 12 and fixed external modules 11 for placing the battery pack 12, wherein the fixed external modules 11 are respectively disposed in the battery case 1, and further including a placing seat 13 for carrying the fixed external modules 11, the fixed external modules 11 are respectively provided with a connecting member and a pressing plate 2 on the lower outer wall thereof, the pressing plate 2 acts on the connecting member, when placing the fixed external modules 11, the fixed external mold presses the pressing plate 2 and acts on the connecting member, so that two adjacent fixed external modules 11 are connected by the connecting member, specifically, the fixed external modules are used for installing lithium batteries, when producing, a plurality of lithium battery plates are placed in series on the fixed external modules to form lithium batteries, and then placed on the placing seat, when performing series connection through copper plates, that is, to form a large-capacity lithium battery pack, when placing each lithium battery, can be through the extrusion of fixed outer module 11 the jam plate 2 acts on connecting elements, make adjacent two fixed outer module 11 is connected through connecting elements, namely, the bottom side through placing on the seat has set up connecting elements, then through the connecting elements who sets up, can be connected with the adjacent seat of placing, and install the in-process of group battery and fixed outer module, can be automatic connect its connecting elements and install, namely, make the adjacent seat of placing connect the installation, improve the lateral stability between each group battery, reduce rocking of its group battery, wholly improve life, and this scheme is through the in-process of installing the group battery, triggering connecting elements that can be automatic connects, namely, can save connecting elements's installation time, improve its installation effectiveness greatly.

Further, the one end of holddown plate 2 articulates on placing seat 13, and other end swing joint is on connecting element, when group battery 12 joint was in the battery tray, extrudees holddown plate 2 to make holddown plate 2 contradict connecting element, make connecting element to the outside protrusion of placing seat 13. Specifically, the connecting member is provided with a connecting block 21, the other end of the pressure plate 2 is provided with a U-shaped groove, and a shaft arranged on the connecting block 21 is rotatably arranged on the U-shaped groove, so that the radian change of the pressure plate 2 during rotation can be adapted to the connection member to be conveniently inserted. According to the invention, the pressing plate 2 can be pressed when the fixed outer module 11 is installed in the placing seat 13, namely, the fixed outer module 11 is further fastened, so that the stability of the fixed outer module is improved.

Further, the connecting member comprises a connecting rod 3 slidably disposed on the placing base 13, and a first lock catch 31 and a second lock catch 32 are disposed on the connecting rod 3, and the second lock catch 32 can be inserted into a lock groove 302 formed on the adjacent first lock catch 31; in order to connect two adjacent placing seats 13, specifically, each placing seat 13 is provided with a connecting member, and the second lock catch 32 can be inserted into the locking groove 302 formed in the adjacent first lock catch 31, that is, the second lock catch 32 in the adjacent placing seat 13 can be inserted into the locking groove 302 formed in the connecting member in another placing seat 13, that is, the two connecting members can be connected, so that the two placing seats 13 are connected.

Further, a side wall of the second lock catch 32 is provided with an inclined surface, and an inclined groove surface adapted to the inclined surface is arranged in the locking groove 302; an elastic member 321 is disposed on one side of the second lock catch 32, and under the elastic force of the elastic member 321, the second lock catch 32 can be inserted into the locking groove 302 formed on the first lock catch 31, and the inclined surface on the second lock catch 32 is made to abut against the inclined groove surface of the locking groove 302; specifically, according to the invention, the inclined surface is arranged on the second lock catch 32 and the inclined groove surface adapted to the inclined surface is arranged on the locking groove 302, so that after the second lock catch 32 is inserted into the locking groove 302, the second lock catch 32 can further tightly abut against the locking groove 302 through the elastic force of the elastic member 321, and the connection performance of the two connection members is improved.

Furthermore, the device also comprises a plugboard 4 inserted between two adjacent placing seats 13, wherein a plurality of heat dissipation holes 401 are formed in the plugboard 4, and the upper part of the plugboard 4 is connected to the fixed outer module 11. According to the invention, the plugboard 4 is arranged between the adjacent placing seats 13, and then the top of the plugboard 4 is mounted on the adjacent placing seats 13, so that not only can the collision vibration between the two adjacent battery packs 12 be reduced, but also the placing stability of the two battery packs 12 can be improved, and further the stability of the battery packs 12 can be greatly improved.

Seted up inserting groove 301 on further connecting rod 3, still be provided with in inserting groove 301 and support tight subassembly, and the fixed grafting piece 41 that is provided with in 4 below pinboards, and grafting piece 41 can be inserted to inserting groove 301 in, and at the in-process of pegging graft: the plug board 4 can abut against the second lock catch 32 through the abutting component.

In a further embodiment of the present invention, the fastening assembly includes a pull post 322 fixedly disposed at one end of the second lock 32, and a shift lever 34 rotatably disposed on the pull post 322, the shift lever 34 is disposed in the insertion groove 301, when the insertion block 41 is inserted into the insertion groove 301, the insertion plate 4 presses the shift lever 34, and the shift lever 34 abuts against the pull post 322 to fasten the second lock 32. After the plugging block 41 is plugged into the plugging groove 301, the shifting lever 34 can be pressed to move downward, and the shifting lever 34 is firstly pressed, so that the shifting lever 34 moves downward, that is, the shifting lever 34 can press the pull post 322 and the second lock catch 32, so that the second lock catch 32 is plugged into the locking groove 302 formed in the first lock catch 31 more tightly.

In a further embodiment of the present invention, an elastic column 42 is disposed at the bottom of the insertion block 41, the elastic column 42 can extend and contract toward the inside of the insertion block 41, the elastic column 42 can extend and contract along the long side direction of the insertion block 41, a locking position 4101 is formed between the elastic column 42 and the insertion block 41, and after the insertion block 41 is inserted in place, the shift lever 34 is located at the locking position 4101.

Furthermore, a supporting column 33 is fixedly arranged in the inserting groove 301, and a convex block arranged on the shift lever 34 is abutted against the supporting column 33, during the process of disengaging the plug block 41 from the plug groove 301, the shift lever 34 can be driven to rotate along the axis of the contact between the convex block and the supporting column 33 by the limitation of the elastic column 42, to pull the pull stud 322 and the secondary lock 32 to retract inward, specifically, as shown in fig. 8 and 10, the support stud 33 is fixedly disposed on the inner portion of the insertion slot 301, when the battery pack 12 needs to be repaired or maintained later and needs to be disassembled, and the insertion block 41 is pulled out of the insertion groove 301, the elastic column 42 can drive the shift lever 34 to move upwards, so that the shift lever 34 can rotate along the axis of the protrusion contacting the support post 33, to pull the pull post 322 and the secondary catch 32 to retract inward, that is, the second lock 32 is brought to contract toward the inside of the connecting rod 3, that is, the connection with the connecting member on the other placing seat 13 can be unlocked.

Further, the supporting rod 341 is rotatably disposed on the shifting rod 34, and one end of the supporting rod 341 is fixedly disposed with the shifting block 3411, and in the process that the plugging block 41 is separated from the plugging slot 301, the elastic column 42 abuts against the shifting block 3411, and drives the shifting block 3411 and the supporting rod 341 to rotate and open so as to be supported on the inner side wall of the connecting rod 3, specifically, as shown in fig. 11, when the plugging block 41 is pulled out from the plugging slot 301 due to the arrangement of the elastic column 42, the elastic column 42 can drive the shifting rod 34 to move upwards, in the process, the elastic column 42 gradually moves along the side wall of the shifting rod 34, then gradually moves to the shifting block 3411, and then drives the shifting block 3411 to rotate, so that the shifting block 3411 and the supporting rod 341 abut against the inner wall of the plugging slot 301, that the shifting rod 34 can drive the second lock 32 to be separated from another connected component, even if the battery pack 12 placing seat 13 is disassembled, the mounting of the battery pack 12 is facilitated.

In the invention, when the installation is carried out, firstly, the placing seat 13 is installed to the corresponding position in the battery shell 1, then the fixed outer module 11 is installed, the lithium battery pack 12 is installed inside the fixed outer module 11, namely, when the fixed outer module 11 is installed on the placing seat 13, the lithium battery can be installed, when the fixed outer module 11 is installed in the placing seat 13, the fixed outer module 11 gradually extrudes the pressing plate placed in the placing seat 13, then the pressing plate is extruded, in the process of extruding the pressing plate, the pressing plate can extrude the connecting rod 3 to the outside of the placing seat 13, so that the connecting rod 3 protrudes to the placing seat 13, then the fixed outer module 11 is installed on the adjacent placing seat 13, after the installation, the connecting rod 3 below the placing seat 13 protrudes similarly, and then the connecting rod 3 is connected with the connecting rod 3 below the adjacent placing seat 13, then, the second lock 32 on the connecting rod 3 is inserted into the lock groove 302 on the other connecting rod 3, as shown in fig. 4, that is, two connecting rods 3 can be connected, so that, when all the fixed outer modules 11 are installed, the connecting rods 3 arranged on the bottom of the placing seats 13 can be inserted into each other, thereby realizing the connection between the adjacent placing seats 13 and improving the stability thereof, then, when the plugboard 4 is installed, in the process of installing the plugboard 4, the insertion blocks 41 arranged below the plugboard 4 are respectively inserted into the insertion grooves 301 formed on the connecting rod 3 assembly, when the plugboard 4 is installed, the shift rod 34 can be extruded to move downwards, the shift rod 34 is gradually extruded, the shift rod 34 moves downwards, in the process of moving downwards, the shift rod 34 gradually extrudes the pull column 322 and the second lock 32, so that the second lock 32 is more tightly inserted into the lock groove 302 formed on the first lock 31, the stability between the second lock catch 32 and the connecting rod 3 is improved, in the process of plugging, the telescopic rod is gradually extruded by the driving rod 34 and gradually extruded towards the inside of the plugging block 41, then the driving rod 34 is gradually positioned on the locking position 4101, the telescopic rod is positioned on one side wall of the driving rod 34 at the moment, namely the installation is finished, then the plugging plate 4 is provided with a plurality of heat dissipation holes 401, and the plurality of heat dissipation holes 401 can dissipate heat and exhaust air of the battery when in use so as to reduce the temperature of the battery when in use, in the invention, when the battery pack 12 is subsequently maintained or maintained and needs to be disassembled, the plugging block 41 is pulled out from the plugging groove 301, the elastic column 42 can drive the driving rod 34 to move upwards, so that the driving rod 34 can rotate along the shaft of the convex block in contact with the supporting column 33, so as to pull the pull column 322 and the second lock catch 32 to shrink inwards, namely, drive the second lock catch 32 to shrink towards the inside of the connecting rod 3, that is, the connection with the connecting component on the other placing seat 13 can be unlocked, so that the two placing seats 13 can be detached, that is, when the device is detached, only the inserting plate 4 needs to be inserted, and the second lock catch 32 can be unlocked through the action of the inserting block 41 and the elastic column 42, so that the device is not only convenient to install, but also convenient to detach, and then when the inserting block 41 is pulled out from the inserting groove 301, the elastic column 42 can drive the shifting rod 34 to move upwards, and in the process, the elastic column 42 gradually moves along the side wall of the shifting rod 34, then gradually moves to the shifting block 1, and then drives the shifting block 3411 to rotate, so that the shifting block 3411 and the supporting rod 341 abut against the inner wall of the inserting groove 301, as shown in fig. 11, the supporting rod 341 abuts against the inner wall of the inserting groove 301 on the connecting rod 3, so as to support the shifting rod 34134 in the state, and thus the second lock catch 32 is continuously in the unlocked state, the unlocking is convenient.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A high-capacity lithium battery pack comprises a battery shell (1), a battery pack (12) and fixed outer modules (11) for placing the battery pack (12), wherein each fixed outer module (11) is respectively arranged in the battery shell (1),

the device is characterized by also comprising a placing seat (13) used for bearing and fixing the outer module (11), wherein a connecting component and a corresponding pressing plate (2) are arranged on the outer wall of the lower side of the fixed outer module (11), and the pressing plate (2) acts on the connecting component;

when the fixed outer die sets (11) are placed, the fixed outer die sets (11) extrude the pressing plate (2) and act on the connecting component, so that two adjacent fixed outer die sets (11) are connected through the connecting component.

2. A high capacity lithium battery pack according to claim 1, characterized in that one end of the pressing plate (2) is hinged to the placing base (13) and the other end is movably connected to the connecting member, when the battery pack (12) is clamped in the battery base, the pressing plate (2) is pressed to make the pressing plate (2) abut against the connecting member, so that the connecting member protrudes to the outside of the placing base (13).

3. The large-capacity lithium battery pack according to claim 1, wherein the connecting member comprises a connecting rod (3) slidably disposed on the placing base (13), and a first lock catch (31) and a second lock catch (32) are disposed on the connecting rod (3), and the second lock catch (32) can be inserted into a lock groove (302) formed on an adjacent first lock catch (31); so as to connect two adjacent placing seats (13).

4. The high-capacity lithium battery pack according to claim 3, wherein a side wall of the second lock catch (32) is provided with an inclined surface, and the locking groove (302) is internally provided with an inclined groove surface adapted to the inclined surface; an elastic piece (321) is arranged on one side of the second lock catch (32), and under the elastic force of the elastic piece (321), the second lock catch (32) can be inserted into a locking groove (302) formed in the first lock catch (31), and an inclined surface on the second lock catch (32) is enabled to abut against an inclined groove surface of the locking groove (302).

5. The high-capacity lithium battery pack as claimed in claim 3, further comprising a plug board (4) inserted between two adjacent placing seats (13), wherein the plug board (4) is provided with a plurality of heat dissipation holes (401), and the top of the plug board (4) is connected to the fixed outer module (11).

6. The high-capacity lithium battery pack according to claim 5, wherein the connecting rod (3) is provided with an insertion groove (301), the insertion groove (301) is further provided with a tightening component, an insertion block (41) is fixedly arranged below the insertion plate (4), the insertion block (41) can be inserted into the insertion groove (301), and in the insertion process: the plug board (4) can tightly abut against the second lock catch (32) through the abutting component.

7. The high-capacity lithium battery pack according to claim 6, wherein the tightening assembly comprises a pull post (322) fixedly arranged at one end of the second lock catch (32), and a shift lever (34) rotatably arranged on the pull post (322), the shift lever (34) is positioned in the insertion groove (301), and when the insertion block (41) is inserted into the insertion groove (301), the insertion plate (4) presses the shift lever (34) and pushes against the pull post (322) through the shift lever (34) to tighten the second lock catch (32).

8. The high-capacity lithium battery pack as claimed in claim 7, wherein the bottom of the plug block (41) is provided with an elastic column (42), the elastic column (42) can extend and contract towards the inside of the plug block (41), the elastic column (42) can extend and contract along the long side direction of the plug block (41), and a locking position (4101) is formed between the elastic column (42) and the plug block (41), so that the shift lever (34) is in the locking position (4101) after the plug block (41) is plugged in place.

9. The high-capacity lithium battery pack according to claim 8, wherein a supporting post (33) is fixedly arranged in the insertion groove (301), a protruding block arranged on the shift lever (34) abuts against the supporting post (33), and in the process that the insertion block (41) is separated from the insertion groove (301), the shift lever (34) can be driven to rotate along a shaft, which is in contact with the supporting post (33), of the protruding block through the limitation of the elastic post (42), so as to pull the pull post (322) and the second lock catch (32) to retract inwards.

10. The lithium battery pack with high capacity according to claim 9, wherein a support rod (341) is rotatably disposed on the shift lever (34), a shift block (3411) is fixedly disposed at one end of the support rod (341), and when the plugging block (41) is separated from the plugging slot (301), the elastic column (42) abuts against the shift block (3411) and drives the shift block (3411) and the support rod (341) to rotate and open so as to be supported on the inner side wall of the connection rod (3).