CN216750214U

CN216750214U - Base device, end plate assembly, battery module and power battery package

Info

Publication number: CN216750214U
Application number: CN202123136144.4U
Authority: CN
Inventors: 赵永金; 黄城
Original assignee: Sinochem International Corp
Current assignee: Sinochem International Corp
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-06-14
Anticipated expiration: 2031-12-10

Abstract

The utility model provides a base device, end plate subassembly, battery module and power battery package, base device include base socket and installation department, and the quantity of base socket is at least three for follow at least three direction and get into the installation department with the guide of base connecting plate. This base device, end plate subassembly, battery module and power battery package are at least three through the quantity that sets up the base socket on base device, and the orientation is at least three direction, can only communicate with the base connecting plate that inserts it with a plurality of directions through a base device alright realization. Also can install this base device on battery module, can be so that other battery modules have multiple arrangement form in the space of connecting, also can make base device adaptation on this battery module and be connected with other battery modules that have multiple arrangement form, the utilization ratio in reinforcing space has avoided connecting space to become the limitation for connected mode between each battery module becomes succinct.

Description

Base device, end plate assembly, battery module and power battery package

Technical Field

The utility model relates to a power battery, in particular to base device, end plate subassembly, battery module and power battery package.

Background

The power battery pack system for the new energy automobile usually comprises a plurality of battery modules, the battery modules are connected through connecting copper bars connected to a base device, a plurality of battery modules are arranged in a certain spatial mode, and therefore a bus bar on each battery module is required to have a plurality of different outgoing line connecting directions or the base device is required to have a plurality of different outgoing line directions. However, in the existing battery module, the base device on the battery module usually has only one to two outgoing line connection directions, and the fewer outgoing line connection directions limit the arrangement mode of the battery module in the limited space of the power battery pack, and also cause the connecting copper bar between the battery modules to become long and the structure to be complicated, thereby increasing the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a base device, end plate subassembly, battery module and power battery package in order to overcome prior art and be qualified for the next round of competitions the defect that the direction of connection is too few.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

a base unit, the base unit includes base socket and installation department, the quantity of base socket is at least three for from at least three direction with the guide of pedestal connection board entering the installation department.

In this scheme, the quantity through setting up base socket on base device is at least three, and sets up the orientation of base socket into at least three direction, can accomplish only through a base device alright realize with insert the base connecting plate above that and communicate with a plurality of directions. Also can install this base unit on the subassembly, and insert base unit through the pedestal connection board and go up to this base unit's installation department, realize this subassembly and other subassembly connections, can make other subassemblies have multiple arrangement form in the space of connecting, also can make the base unit adaptation on this subassembly and be connected with other subassemblies that have multiple arrangement mode, can strengthen the utilization ratio in space, it becomes the limitation to have avoided connecting space, also avoid pedestal connection board overlength or the structure complicacy to increase the cost of manufacture, and avoided the pedestal connection board because of the number of times of buckling too many reduction transmission efficiency and reduction its life. Meanwhile, each assembly is provided with a base device with a plurality of base socket directions, so that the connection mode among the assemblies is simplified.

Preferably, the base device further comprises a protective cap made of an insulating material, and the protective cap is arranged above the mounting portion and used for covering the base connecting plate.

In this scheme, when the base connecting plate that comes from all directions inserts and gets into base device on the base socket on, and with the common movable mounting of each base connecting plate on the installation department, when carrying out base connecting plate and other subassembly electrically conductive connections, set up the protection cap that the material is insulating material and establish in the top of installation department, when realizing that base device connects as electrically conductive relay station and other subassemblies, also can protect base device's insulating properties, avoid personnel's accident to touch and take place danger.

Preferably, the base device comprises a body, and at least one base socket is a groove formed on the body, and/or at least one base socket is a groove formed between the body and the protective cover.

In this scheme, set up the base socket on the body, and this base socket sets up to the notch form, need not to set up the installation that other protruding portions are used for the base connecting plate on the body, to a certain extent, has strengthened the availability in space, and practices thrift the cost, simple structure. Meanwhile, the base socket is divided into two types, the first type is that the base socket is a groove formed on the body of the base device, namely, in different directions on the body, an opening is directly arranged for inserting a base connecting plate; the second type is that the base socket is the recess that forms between body and the visor, can directly penetrate the base connecting plate to the installation department and be connected with it according to the direction of connection of body and installation department can. The two types of base jacks can be arranged according to different connection modes or connection spaces of different components, and the two types of base jacks can be matched and randomly combined on the base device, can be randomly selected in quantity, enhances the free flexibility of connection among the components, and can be suitable for connection among various components.

Preferably, the base device includes a body including a support portion disposed around the mounting portion, and the protective cap is disposed on the support portion.

In this scheme, as mentioned above, the protection cap is arranged above the installation portion and is used for protecting the base installation plate movably connected to the installation portion, so that the supporting portion is arranged on the base device and arranged on the periphery of the installation portion to surround the whole installation portion, the installation portion can be covered by a larger area while the protection cap is supported, and the insulation property of the protection cap is enhanced.

Preferably, the protective cap comprises a clamping groove, and the clamping groove is clamped with the first buckle on the supporting part to fix the protective cap.

In this scheme, the supporting part sets up on base device to be used for supporting the protective cap, so set up first buckle on the supporting part, set up the draw-in groove on the protective cap, through the block mating reaction of first buckle and draw-in groove, strengthened reliability and the steadiness that protective cap and supporting part are connected.

Preferably, the base receptacles have different heights for allowing base connection plates to enter and stack from different heights.

In this case, when the pedestal connection plate is inserted into the pedestal insertion opening and mounted on the mounting portion, since the pedestal connection plate is an intermediate medium for conducting electricity between the components, the conductive connection plate has a certain thickness. The base connecting plate is movably connected to the mounting portion after being inserted into the base device, so that the base insertion openings are arranged to have different heights, and the situation that the base connecting plate cannot be stacked and stacked high and movably connected to the mounting portion due to the fact that the base insertion openings are located at the same height and opposite to the mounting portion after the base connecting plate is inserted into the base insertion openings can be avoided.

An end plate assembly comprising a base unit as described above and a metal end plate, the base unit being removably mounted on the metal end plate.

In this scheme, with base device activity, demountable installation on the metal end plate, and base device can set up on the optional position of metal end plate as required and base device's quantity also can set up as required. The aim at that sets up the metal end plate constitutes the end plate subassembly jointly after installing base device on the metal end plate, can realize installing this end plate subassembly direct mount on each subassembly, need not install base device on each subassembly, destroys the structure of each subassembly, also is convenient for staff's operation, need not additionally to install metal end plate and base device. And the base device can be installed on the metal end plate, and the conductive connection of each component through the base device is realized, so that the base device is not required to be arranged in an extra space, and the utilization rate of the space is enhanced.

Preferably, the metal end plate comprises a fixed clamping groove, the base device is provided with a second buckle, and the second buckle penetrates through the fixed clamping groove and is movably connected with the metal end plate.

In this scheme, set up fixed slot on the metal end plate for install base device, so set up the second buckle on base device, through the block mating reaction of second buckle and fixed slot, strengthened reliability and the steadiness that base device and metal end plate are connected.

A battery module comprises the end plate assembly and the battery module, wherein the battery module comprises a bus bar, a total pole bus bar and a lug, and the bus bar and the total pole bus bar are sequentially connected in an array along the length direction of the metal end plate; the main pole bus bar is located at one end close to the metal end plate, one end of the main pole bus bar is connected with the pole lug, and the other end of the main pole bus bar is inserted into the socket of the base and movably connected with the base device.

In this scheme, install the end plate subassembly on battery module, and be located battery module's both ends for realize through the end plate subassembly with other battery module electrically conductive connection. And dividing the battery module into a bus bar and a total pole bus bar, and sequentially arranging and connecting the bus bar and the total pole bus bar along the length direction connected with the metal end plate. Install total utmost point busbar in the one end that is close to the metal end plate, be convenient for total utmost point busbar and end plate subassembly are connected, realize passing through end plate subassembly and other battery module with the electric current that total utmost point busbar gathered and connect, avoid total utmost point busbar apart from the end plate subassembly too far away, lead to making the structure of end plate subassembly become complicated, increase the cost of manufacture, and reduce the availability ratio of connection space. The battery module further comprises a tab, the tab is connected with the battery core, electricity on the battery core can be transmitted to the end plate assembly through the total pole bus bar, and then the current is transmitted out through the end plate assembly, so that the total pole bus bar is similar to a wire and is used for realizing the transmission of the current. The one end and the utmost point ear fixed connection of total utmost point busbar are in the same place, and the base socket on the base device is inserted to the other end of total utmost point busbar to through the bolt with total utmost point busbar and base device swing joint together, other base connecting plates through the last connection of base device have finally realized transmitting the electric current of the total utmost point busbar on this battery module to other battery modules on. The operation is simple, and the conductive efficiency is enhanced.

A power battery pack comprises the battery modules and a base connecting plate, wherein at least three battery modules are connected to the mounting part of another battery module through the base connecting plate.

In this scheme, each battery module passes through the transmission that the base connecting plate realized the electric current on the base device. In the prior art, one base device can only be connected with one to two base connecting plates, so that the arrangement mode of the battery modules is limited in the power battery pack, the structure of the base connecting plates is complicated or the length of the base connecting plates is increased, and the manufacturing cost is increased. The space availability of the power battery pack is enhanced, the manufacturing cost is reduced, and the connection mode before each battery module becomes free and flexible.

The utility model discloses an actively advance the effect and lie in: this base device, end plate subassembly, battery module and power battery package are at least three through the quantity that sets up the base socket on base device, and set up the orientation of base socket into at least three direction, can accomplish only through a base device alright realize with insert the base connecting plate above that and a plurality of directions communicate. Also can install this base device on battery module, and insert base device through the pedestal connection board and go up to this base device's installation department, realize this battery module and be connected with other battery modules, can make other battery modules have multiple arrangement form in the space of connecting, also can make the base device adaptation on this battery module and be connected with other battery modules that have multiple arrangement mode, can strengthen the utilization ratio in space, it becomes the limitation to have avoided connecting space, also avoid pedestal connection board overlength or the complicated increase cost of manufacture of structure, and avoided the pedestal connection board to reduce transmission efficiency too much and reduce its life because of the number of times of buckling. Meanwhile, each battery module is provided with a base device with a plurality of base socket directions, so that the connection mode among the battery modules is simplified.

Drawings

Fig. 1 is a schematic view of an overall structure of a battery module according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view of the overall structure of the end plate assembly according to the preferred embodiment of the present invention.

Fig. 3 is an exploded view of the base unit according to the preferred embodiment of the present invention.

Fig. 4 is a schematic view of the overall structure of the base device according to the preferred embodiment of the present invention.

Fig. 5 is a schematic view of another perspective of the base device according to the preferred embodiment of the present invention.

Description of reference numerals:

base device 1

Base socket 11

First type 111

Second type 112

Mounting part 12

Bolt 121

Body 13

Protective cap 14

Card slot 141

Support part 15

First buckle 161

Second buckle 162

Tapered structural assembly 1621

Projection 17

Base connecting plate 2

End plate assembly 3

Metal end plate 31

Fixed card slot 311

Battery module 4

Battery module 41

Bus bar 411

Bus bar 412

Tab 42

Plastic end plate 43

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings. As shown in fig. 2 to 3, a base device 1, the base device 1 includes a base socket 11 and a mounting portion 12, the base socket 11 is located on the base device 1, the mounting portion 12 is located inside the base device 1, and a plurality of base sockets 11 are collectively collected on the mounting portion 12. The quantity of base socket 11 on a base device 1 is at least three, and the orientation of base socket 11 sets up to at least three direction, sets up base socket 11's purpose and is used for getting into base device 1 with base connecting plate 2 guide in to place on installation department 12, can accomplish only through a base device 1 alright realize with insert on it base connecting plate 2 with a plurality of directions communicate. Also can install this base device 1 on the subassembly, and insert base device 1 through base connecting plate 2 and go up to this base device 1's installation department 12, realize this subassembly and other subassembly connections, can make other subassemblies have multiple arrangement form in the space of connecting, also can make base device 1 adaptation on this subassembly and be connected with other subassemblies that have multiple arrangement mode, can strengthen the utilization ratio in space, it becomes the limitation to have avoided connecting space, also avoid base connecting plate 2 overlength or the complicated increase cost of manufacture of structure, and avoided base connecting plate 2 to reduce transmission efficiency too much and reduce its life because of the number of times of buckling. Meanwhile, the connection mode among the components is simplified through the base device 1 with a plurality of base sockets 11 on the components.

As shown in fig. 3, the base connection plate 2 is movably connected to the mounting portion 12, and in the present embodiment, bolts 121 are movably connected, so that two bolts 121 are provided inside the base device 1, two bolt 121 holes are correspondingly provided in the mounting portion 12, the base connection plate 2 inserted into the base insertion opening 11 and entering the base device 1 is movably connected together by the bolts 121, and the base connection plate 2 is movably connected together with the mounting portion 12 by the bolts 121. When the bolt 121 is used for mounting the base connecting plate 2 on the mounting part 12, the nut on the bolt 121 is 0.3 mm-1 mm higher than the plane of the mounting part 12.

As shown in fig. 2-3, the base device 1 further includes a protective cap 14, the protective cap 14 is covered on the mounting portion 12, and as above, the base connecting plate 2 is movably connected to the mounting portion 12 through a bolt 121 for conducting the electrical conduction. Therefore, the protective cap 14 covers the bolt 121, and the purpose of the protective cap 14 is to cover the base connecting plate 2, so that the protective cap 14 is made of an insulating material, and when the base device 1 is used as a conductive relay station and connected with other components, the insulating property of the base device 1 can be protected, and the danger caused by accidental touch of personnel is avoided.

Specifically, as shown in fig. 2, the base device 1 includes a body 13, the base socket 11 is installed on the base device 1, and the base socket 11 is configured to be groove-shaped, and there is no need to provide other protruding portions 17 on the body 13 for installation of the base connecting plate 2, so that the availability of space is enhanced to a certain extent, the cost is saved, and the structure is simple.

Meanwhile, the base socket 11 is classified into two types: the first type 111 is that the base socket 11 is a groove formed on the body 13 of the base device 1, that is, in different directions on the body 13, an opening is directly provided for inserting the base connection plate 2; the second type 112 is that the base socket 11 is a groove formed between the body 13 and the protective cover, i.e. the base connecting plate 2 can be directly inserted into the mounting portion 12 according to the connection direction of the body 13 and the mounting portion 12 and connected with the mounting portion 12.

In the present embodiment, the types of the base socket 11 can be arbitrarily combined, and the specific embodiments are at least three embodiments:

firstly, the method comprises the following steps: only the first type 111 of recess is provided on the body 13;

secondly, the method comprises the following steps: only the second type 112 of recess is provided on the body 13;

thirdly, the method comprises the following steps: grooves of a first type 111 and a second type 112 are provided on the body 13.

As for the types of the base sockets 11, the two types of base sockets 11 can be combined arbitrarily and the number of the base sockets 11 can be selected arbitrarily on the base device 1 according to the connection modes with different components or different arrangements in the connection space, so that the free flexibility of connection between the components is enhanced, and the base socket device can be suitable for connection between various components.

Furthermore, as shown in fig. 2, the body 13 of the base device 1 includes the supporting portion 15, and as described above, the protective cap 14 covers the mounting portion 12 to protect the base mounting plate movably connected to the mounting portion 12, so that the supporting portion 15 is disposed on the base device 1 and disposed on the periphery of the mounting portion 12 to surround the whole mounting portion 12, which can more effectively support the protective cap 14 and cover the mounting portion 12 in a larger area, thereby enhancing the insulation of the protective cap 14.

In order to stably mount the protective cap 14 on the supporting portion 15, the locking groove 141 is provided on the protective cap 14, the first latch 161 is provided on the supporting portion 15 of the base device 1, and the protective cap 14 is fixed on the supporting portion 15 by the mutual matching and locking action of the first latch 161 and the locking groove 141, so that the reliability and the stability of the connection between the protective cap 14 and the supporting portion 15 are enhanced.

As shown in fig. 5, when the base connection plate 2 is inserted into the base insertion opening 11 and installed on the installation portion 12, since the base connection plate 2 is an intermediate medium for conducting electricity between the components, the base connection plate 2 has a certain thickness, and the nut on the bolt 121 also has a certain height difference with respect to the horizontal plane of the installation portion 12, when the base insertion opening 11 is installed on the base device 1, the base insertion opening 11 is installed on the body 13 of the base device 1 at different heights, and a certain height difference exists between the base insertion openings 11, and a certain height difference also exists between the base insertion openings 11 and the nut on the bolt 121, so that the purpose of the installation is as follows: the base connecting plates 2 are used for entering from different heights and being stacked together, and therefore the situation that after the base connecting plates 2 are inserted into the base inserting openings 11, the base inserting openings 11 are located at the same height and are oppositely arranged on the mounting portion 12, and the base connecting plates 2 cannot be stacked and stacked high on the mounting portion 12 and are movably connected can be avoided.

As shown in fig. 2, the end plate assembly 3 includes the base device 1 and the metal end plate 31, the base device 1 is detachably and movably mounted on the metal end plate 31, and the base device 1 can be disposed on any position of the metal end plate 31 and the number of the base devices 1 can also be set as required.

As shown in fig. 2, the metal end plate 31 is provided to jointly form the end plate assembly 3 after the base device 1 is mounted on the metal end plate 31, so that the end plate assembly 3 can be directly mounted on each assembly without mounting the base device 1 on each assembly, destroying the structure of each assembly, facilitating the operation of a worker and additionally mounting the metal end plate 31 and the base device 1. And base unit 1 can install on metal end plate 31, realizes that each subassembly passes through base unit 1 conductive connection, need not set up base unit 1 on extra space, then has strengthened the availability in space.

In fig. 2, in order to stably mount the base device 1 on the support portion 15, a fixing slot 311 is provided on the metal end plate 31, and a second buckle 162 is provided on the base device 1, the second buckle 162 penetrates the fixing slot 311 and is movably connected with the metal end plate 31, and the reliability and stability of the connection between the base device 1 and the metal end plate 31 are enhanced by the engagement and cooperation between the second buckle 162 and the fixing slot 311.

Specifically, the number of the fixed card slots 311 may be selected as needed, and the specific positions of the fixed card slots 311 may be set as needed. In this embodiment, two fixing clip slots 311 are selected and disposed on two ends of the metal end plate 31, so that the base device 1 can be connected to other components with a longer distance between the two ends.

Meanwhile, as shown in fig. 4, in this embodiment, the second buckle 162 is provided with a plurality of tapered structural components 1621, and the plurality of tapered structural components 1621 and the fixed slot 311 are in interference fit, so that stability and reliability of the mutual connection and matching between the fixed slot 311 and the second buckle 162 can be realized.

Moreover, since the metal end plate 31 is generally in contact with the external box, if the metal end plate 31 is charged, the external box is charged, and there are some potential hazards. Therefore, the second latch 162 is made of an insulating material, so as to prevent the charged base device 1 from transmitting electricity to the metal end plate 31.

As shown in fig. 1, a battery module 4, the battery module 4 includes the above end plate assembly 3 and battery modules 41, and the battery modules 41 are mounted between the metal end plates 31, that is, the end plate assemblies 3 are mounted on both ends of the battery modules 41 for electrically connecting with other battery modules 41 through the end plate assemblies 3.

In fig. 1, the battery module 41 is divided into the bus bar 412 and the total pole bus bar 411, and the bus bar 412 and the total pole bus bar 411 are connected in series in the longitudinal direction of the connecting metal end plate 31. In this embodiment, install total utmost point busbar 411 in the one end that is close to metal end plate 31, be convenient for total utmost point busbar 411 and end plate subassembly 3 connect, realize passing through end plate subassembly 3 with the electric current that total utmost point busbar 411 gathers and connect with other battery module 4, avoid total utmost point busbar 411 to be too far away from end plate subassembly 3, lead to making end plate subassembly 3's structure become complicated, increase the cost of manufacture, and reduce the availability ratio of connecting the space. In other embodiments, the arrangement between the bus bar 411 and the bus bar 412 may be arranged as desired.

As shown in fig. 5, the battery module 4 further includes a tab 42, the tab 42 is connected to the battery core, electricity on the battery core can be transmitted to the end plate assembly 3 through the bus bar 411, and then the current is transmitted through the end plate assembly 3, and then the bus bar 411 is similar to a wire, and is used for transmitting the current. One end of the bus bar 411 and the tab 42 are fixedly connected together, in this embodiment, one end of the bus bar 411 and the tab 42 are fixedly connected together by laser welding, the other end of the bus bar 411 is inserted into the base socket 11 of the base device 1, the other end of the general tab 42 can be selected to be connected with the base socket 11 with the shortest distance, then the bus bar 411 and the base device 1 are movably connected together by the bolt 121, and finally, the current of the bus bar 411 on the battery module 4 is transmitted to other battery modules by other base connecting plates 2 connected to the base device 1. The operation is simple, and the conductive efficiency is enhanced.

As shown in fig. 2 and 3, since the metal end plate 31 is charged and the battery module 41 is charged, if no insulation treatment is performed between the metal end plate 31 and the battery module 41, the metal end plate 31 will be charged, and the metal end plate 31 is in contact with an external box, which will also charge the external box, thereby causing some potential hazards. Therefore, in order to avoid some potential safety hazards, the base device 1 and the bus bar 411 need to be arranged at intervals, and the specific arrangement method includes at least two implementation methods:

the first method comprises the following steps: a plastic end plate 43 is arranged between the metal end plate 31 and the battery module 41, so that the metal end plate 31 and the battery module 41 are in an insulated state, and the metal end plate 31 is prevented from being electrified;

and the second method comprises the following steps: a protruding part 17 is arranged on one end of the body 13 of the base device 1 close to the bus bar 411, the thickness of the protruding part 17 is larger than that of the metal end plate 31, and the protruding part 17 and the metal end plate 31 are arranged at intervals, so that one end distance is kept, and the metal end plate 31 is prevented from being electrified.

As shown in fig. 1, a power battery pack includes the above battery modules 4 and the base connection plate 2, and current transmission is realized between the battery modules 4 through the base connection plate 2 on the base device 1. In the prior art, one base device 1 can only be connected with one to two base connecting plates 2, which limits the arrangement mode of the battery modules 4 in the power battery pack, makes the structure of the base connecting plates 2 complicated or increases the length of the base connecting plates 2, and increases the manufacturing cost, so compared with the prior art, the base device 1 in the scheme can be connected with at least three base connecting plates 2, so that the arrangement mode of the battery modules 4 in the power battery pack cannot be limited, and the base device can be adapted to the connection of the battery modules 4 in various arrangement modes. The space availability of the power battery pack is enhanced, the manufacturing cost is reduced, and the connection mode of each battery module 4 is free and flexible.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a base device, base device includes base socket and installation department, its characterized in that, the quantity of base socket is at least three for from at least three direction with the guide of base connecting plate entering the installation department.

2. The pedestal device according to claim 1, further comprising a protective cap made of an insulating material and disposed above the mounting portion to cover the pedestal connection plate.

3. Foot means according to claim 2, wherein said foot means comprises a body, at least one said foot socket being a groove opening in said body and/or at least one said foot socket being a groove formed between said body and said protective cap.

4. The base unit of claim 2, wherein the base unit includes a body including a support portion disposed about the mounting portion, the protective cap being disposed on the support portion.

5. The pedestal device of claim 4, wherein the protective cap comprises a slot thereon, and the slot is fixed by engaging with a first snap on the supporting portion.

6. Base unit according to claim 4, characterized in that the base receptacles have different heights for entering and stacking base webs from different heights.

7. An end plate assembly comprising a base unit according to any one of claims 1 to 6 and a metal end plate, said base unit being removably mounted to said metal end plate.

8. The end plate assembly of claim 7, wherein the metal end plate includes a fixing slot, and the base device is provided with a second buckle, and the second buckle penetrates through the fixing slot to be movably connected with the metal end plate.

9. A battery module comprising the end plate assembly of claim 7 or 8 and a battery module, wherein the battery module comprises bus bars, bus bar bars, and tabs, and wherein the bus bars and the bus bar bars are sequentially connected in series along the length direction connecting the metal end plates; the main pole bus bar is located at one end close to the metal end plate, one end of the main pole bus bar is connected with the pole lug, and the other end of the main pole bus bar is inserted into the socket of the base and movably connected with the base device.

10. A power battery pack comprising the battery module according to claim 9 and a base connection plate, wherein at least three battery modules are connected to a mounting portion of another battery module through the base connection plate.