CN216529257U - Square battery - Google Patents

Abstract

The embodiment of the application relates to the technical field of batteries, in particular to a square battery; the application provides a square battery, which comprises a shell, a core body and at least one split structure; the housing has at least one terminal mounting port; the core body is arranged in the shell and comprises a first tab, a second tab, a first terminal electrically connected to the first tab and a second terminal electrically connected to the second tab, and the first tab and the second tab are arranged towards the terminal mounting opening respectively; the split structure is covered on the terminal mounting opening, the split structure is provided with at least one concave portion, and the first terminal and the second terminal can respectively extend out of the shell from the terminal mounting opening through the concave portions under the condition that the first terminal and the second terminal are accommodated in the shell. The manufacturing process of the lugs at the two ends can be simplified, the process difficulty of the 'long-blade' battery in the manufacturing process is reduced, a new manufacturing process can be provided for the square battery cell with the lugs on one side, and meanwhile, the manufacturing cost can be reduced.

Description

Square battery

Technical Field

The embodiment of the application relates to the technical field of batteries, in particular to a square battery.

Background

With the continuous maturity of lithium ion battery technology, market demand is constantly changing, and in order to satisfy the battery performance demand of current high energy density, making core size big in the finite space is the technical problem that needs to solve urgently.

SUMMERY OF THE UTILITY MODEL

The application provides a square battery and an electric automobile for promote the space utilization of core.

As one aspect, the present application provides a prismatic battery including:

a housing having at least one terminal mounting opening;

the core body is arranged in the shell and comprises a first lug, a second lug, a first terminal electrically connected to the first lug and a second terminal electrically connected to the second lug, and the first lug and the second lug are respectively arranged towards the terminal mounting port;

and the split structure is provided with at least one concave part, and the first terminal and the second terminal can respectively extend out of the shell from the terminal mounting port through the concave parts under the condition that the first terminal and the second terminal are accommodated in the shell.

In a possible implementation manner, the number of the terminal installation openings is two, the two terminal installation openings are respectively a first terminal installation opening and a second terminal installation opening which are arranged at two ends of the shell along the length direction of the shell, the first terminal is arranged towards the first terminal installation opening of the shell, the second terminal is arranged towards the second terminal installation opening of the shell, the first terminal can extend out of the shell from the inside of the first terminal installation opening, and the second terminal can extend out of the shell from the inside of the second terminal installation opening;

the split structure is two, and the two split structures are respectively covered on the first terminal mounting opening and the second terminal mounting opening.

In one possible implementation, the split structure includes:

the substrate, the cover is set on the terminal mounting opening, and the concave part is set on the substrate.

In one possible implementation, a limiting structure is arranged between the substrate and the terminal mounting opening, and the limiting structure is used for limiting the first terminal and/or the second terminal to move relative to the shell.

In one possible implementation manner, the limiting structure comprises a limiting part and a limiting matching part which can abut against each other;

the limiting part is arranged on one side, facing the terminal mounting opening, of the substrate, the limiting part is provided with a terminal limiting space, the concave part is communicated with the terminal limiting space, the limiting fitting piece is arranged on the first terminal and/or the second terminal, and the limiting fitting piece is contained in the limiting space.

In one possible implementation, a side of the substrate facing the terminal mounting opening is divided into a first region, a second region and a third region which are adjacent in sequence along a width direction of the housing, and the concave portion is located in the second region;

the split structure further comprises a buckling structure for buckling with the inner wall of the shell, and the buckling structure is connected to the substrate and is located in the first area and/or the second area.

In one possible implementation, the split structure further includes:

the reinforcing part extends along the width direction of the shell and comprises a first side and a second side which are arranged along the thickness direction of the shell, the first side of the reinforcing part is attached to the limiting part and the buckling structure, and the second side of the reinforcing part is buckled on the inner wall of the shell.

In one possible implementation manner, a connecting component for connecting the buckling structure and the reinforcing component is further arranged between the buckling structure and the reinforcing component;

the connecting part comprises a connecting part and a connecting matching part which can be detachably connected;

the connecting part is arranged on the buckling structure, and the connecting matching part is arranged on the reinforcing component; alternatively, the first and second electrodes may be,

the connecting part is arranged on the reinforcing part, and the connecting matching part is arranged on the buckling structure.

In one possible implementation, the connecting portion is a mounting hole, the connecting fitting portion is a protrusion, and the protrusion is embedded in the mounting hole.

In a possible implementation manner, the outer edge of the split structure is provided with a supporting surface, and the split structure is supported on the shell through the supporting surface.

In a possible implementation mode, first utmost point ear is the positive pole, from the first terminal installing port of casing to the second terminal installing port of casing, first terminal is including folding the first clamp plate of establishing according to the preface, weak baffle and first buckle, spacing fitting piece is folded and is established on one side that first buckle deviates from first clamp plate, first fastener runs through first clamp plate, weak baffle, first buckle and spacing fitting piece, first buckle supports to hold on one side that deviates from the casing at the components of a whole that can function independently structure, the first fastener of first utmost point ear electric connection of core is towards the one end of the second terminal installing port of casing, and first clamp plate and weak baffle stretch out outside the casing.

In a possible implementation mode, the second tab is a negative electrode, from the second terminal installing port of the casing to the first terminal installing port of the casing, the second terminal comprises a second pressing plate, an insulating plate and a second snap ring, which are sequentially overlapped, a limiting fitting piece is overlapped and arranged on one side of the second snap ring departing from the second pressing plate, the second fastener penetrates through the second pressing plate, the insulating plate, the second snap ring and the limiting fitting piece, the second snap ring is abutted and held on one side of the split structure departing from the casing, the second tab of the core is electrically connected with one end of the second fastener facing the first terminal installing port of the casing, and the second pressing plate and the insulating plate stretch out of the casing.

The characteristics and advantages of the embodiment of the application are as follows:

according to the embodiment of the application, the first tab and the second tab of the core are respectively and electrically connected with the first terminal and the second terminal, the first tab and the second tab are respectively arranged towards the terminal mounting opening of the shell, and under the condition that the first terminal and the second terminal are accommodated in the shell, the first terminal and the second terminal can respectively extend out of the shell from the terminal mounting opening through the concave part of the split structure, and the split structure is covered on the terminal mounting opening of the shell; therefore, the connection (such as welding) of the first tab and the second tab with the core is completed before entering the shell, the tab in the shell does not need to be drawn out to the outside of the shell to complete the connection (such as welding) of the tab and the cover plate, so that the technical problem of stacking the tabs in the shell is effectively solved, and the space utilization rate of the core is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded schematic view of a square battery according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a split structure, a limiting structure, a connecting part and a first terminal in the embodiment of the application;

FIG. 3 is a schematic bottom view of the split structure in the embodiment of the present application;

FIG. 4 is a schematic view of the first terminal and the positive engagement member of an embodiment of the present application;

fig. 5 is a schematic view of the second terminal and the positive engagement element in an embodiment of the present application.

Reference numerals:

100. a housing; 101. a terminal mounting port; 1011. a first terminal mounting port; 1012. a second terminal mounting port;

200. a core body; 201. a first tab; 202. a first terminal; 2021. a first platen; 2022. a weak guide plate; 2023. a first retaining ring; 2024. a first fastener; 203. a second terminal; 2031. a second platen; 2032. an insulating plate; 2033. a second retaining ring; 2034. a second fastener;

300. a split structure; 301. a substrate; 3011. a recess; 3012. a first region; 3013. a second region; 3014. a third region; 302. a buckling structure; 303. a reinforcing member; 3031. a first side; 3032. a second side; 304. a propping surface;

400. a limiting structure; 401. a limiting member; 4011. a terminal limiting space; 402. a limit fitting piece;

500. a connecting member; 501. a connecting portion; 502. and connecting the matching parts.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

For ease of understanding, an application scenario of the square battery according to the present application will be described first. The square battery provided by the embodiment of the application is used for an electric automobile or other electric equipment (such as an energy storage power station) to provide power for the electric automobile or other electric equipment.

Electric vehicles, energy storage power stations, and the like generally require the use of batteries having a large capacity as power sources. In addition to high safety and long cycle life, these batteries should have high energy density to meet the use standards and meet the needs of people.

The existing square battery with lugs at two ends of the shell has many advantages in the aspect of battery pack grouping, but the battery has many disadvantages; the battery with the tabs at two ends usually comprises a shell, a core body and a cover plate, wherein the core body is usually accommodated in the shell, and the tabs of the core body are connected to the cover plate in a conductive connection mode and are insulated from the cover plate.

This battery all adopts traditional handicraft with processes such as apron welding, core income shell and seal welding, and the battery of this kind of structure must guarantee for the convenience finally to go into the shell that core one end adopts long utmost point ear, roughly can divide into two kinds from structural: firstly, a stop frame with higher height is matched with a longer tab (the tab is welded with a cover plate connecting sheet), one end of the stop frame is welded and then enters a shell, and the other end of the stop frame is welded, the manufacturability and the safety of the scheme are higher, but the utilization rate of a corresponding space of a core body is lower, so that the volume energy density of a battery is relatively lower; secondly, the stopping frame with relatively low height is matched with longer lugs (the lugs are welded with the cover plate in advance), one end of each lug is welded and then enters the shell, and the other end of each lug is welded, but the lugs at the position are stacked thickly due to the longer lugs, and the risk of short circuit of the battery exists.

Therefore, in order to solve at least some of the above problems, in the embodiments of the present invention, by providing an electrically connected first terminal and an electrically connected second terminal on a first tab and a second tab of a core, respectively, the first tab and the second tab are respectively disposed toward a terminal mounting opening, since the first terminal and the second terminal can respectively extend from the terminal mounting opening to the outside of the housing through a recess of a split structure that covers the terminal mounting opening of the housing in a state that the first terminal and the second terminal are accommodated in the housing; therefore, the connection (such as welding) of the first tab and the second tab with the core is completed before entering the shell, the tab in the shell does not need to be drawn out to the outside of the shell to complete the connection (such as welding) of the tab and the cover plate, so that the technical problem of stacking the tabs in the shell is effectively solved, and the space utilization rate of the core is improved.

The prismatic battery according to the embodiment of the present application will be described in detail below with reference to the drawings.

Fig. 1 is an exploded schematic view of a square battery according to an embodiment of the present disclosure;

as shown in fig. 1 to 5, and in particular fig. 1, an embodiment of the present application provides a prismatic battery, which includes a case 100, a core 200, and at least one split structure 300; the housing 100 has at least one terminal mounting opening 101; the core 200 is arranged in the shell 100, the core 200 includes a first tab 201, a second tab, a first terminal 202 electrically connected to the first tab 201, and a second terminal 203 electrically connected to the second tab, the first tab 201 and the second tab are respectively arranged towards the terminal mounting opening 101; at least one split structure 300 is disposed on the terminal mounting opening 101, the split structure 300 has at least one recess 3011, and the first terminal 202 and the second terminal 203 can respectively extend out of the housing 100 from the terminal mounting opening 101 through the recess 3011 in a state where the first terminal 202 and the second terminal 203 are accommodated in the housing 100.

For example, the housing 100 may have a rectangular parallelepiped structure, the housing 100 has an accommodating space for accommodating the core 200 therein, and the housing 100 may have at least one terminal mounting opening 101 thereon; the core 200 may be a rectangular parallelepiped structure and is disposed in the housing 100, the core 200 includes a first tab 201, a second tab, a first terminal 202 electrically connected (e.g., laser welded) to the first tab 201, and a second terminal 203 electrically connected (e.g., laser welded) to the second tab, the first tab 201 and the second tab are disposed toward the terminal mounting opening 101, respectively; the shape of the cross section of the split structure 300 is substantially matched with the shape of the cross section of the housing 100, and the split structure 300 is covered on the terminal mounting opening 101 by welding, bonding, screwing, clamping or the like.

In specific implementation, the first terminal 202 may be laser welded to a first tab 201 (e.g., a positive electrode) of the core 200, and the second terminal 203 may be laser welded to a second tab (e.g., a negative electrode) of the core 200; the core 200 with the first terminal 202 and the second terminal 203 is then placed into the housing 100; finally, the terminal mounting opening 101 is covered by the separate structure 300 to seal the case 100, thereby completing the assembly of the prismatic battery.

In the embodiment of the application, the first tab 201 and the second tab of the core 200 are respectively and electrically connected with the first terminal 202 and the second terminal 203, the first tab 201 and the second tab are respectively arranged towards the terminal installation opening 101, because the first terminal 202 and the second terminal 203 can respectively extend out of the casing 100 from the inside of the terminal installation opening 101 of the casing 100 through the concave part 3011 of the split structure 300 under the condition that the first terminal 202 and the second terminal 203 are accommodated in the casing 100, and the split structure 300 is covered on the terminal installation opening 101 of the casing 100; therefore, the connection (e.g., welding) of the first tab 201 and the second tab with the core 200 is completed before the first tab and the second tab are inserted into the case, and the battery can be assembled without pulling the tabs in the case 100 out of the case 100, so that the technical problem of stacking the tabs in the case 100 can be effectively solved, the space utilization rate of the core 200 can be improved, the battery manufacturing process can be simplified, and the battery manufacturing difficulty can be reduced.

It is understood that the cross-sectional shapes of the shell 100, the core 200 and the split structure 300 may be triangular, quadrangular or pentagonal, etc.

The core 200 may be a stacked core, a roll core, or other suitable types.

In other examples, in order to cover the split structure 300 on the terminal mounting opening 101, the split structure 300 may be directly hinged to the housing 100, so that after the core 200 is inserted into the housing, the split structure 300 is rotated to cover the terminal mounting opening 101, and in addition, the split structure 300 does not need to be positioned through the hinged arrangement, which is beneficial to automated production.

According to an embodiment of the present application, with continued reference to fig. 1, the number of the terminal mounting openings 101 may be two, the two terminal mounting openings 101 may be a first terminal mounting opening 1011 and a second terminal mounting opening 1012 respectively disposed at two ends of the housing 100 along the length direction L of the housing 100, the first terminal 202 may be disposed toward the first terminal mounting opening 1011 of the housing 100, the second terminal 203 may be disposed toward the second terminal mounting opening 1012 of the housing 100, the first terminal 202 may protrude from the first terminal mounting opening 1011 to the outside of the housing 100, and the second terminal 203 may protrude from the second terminal mounting opening 1012 to the outside of the housing 100; the number of the split structures 300 may be two, and the two split structures 300 may be respectively disposed on the first terminal mounting opening 1011 and the second terminal mounting opening 1012.

Illustratively, the two terminal mounting openings 101 are a first terminal mounting opening 1011 and a second terminal mounting opening 1012 oppositely disposed at two ends of the housing 100 along the length direction L of the housing 100, the first terminal 202 is disposed toward the first terminal mounting opening 1011 of the housing 100, such as toward the left, and the second terminal 203 is disposed toward the second terminal mounting opening 1012 of the housing 100, such as toward the right, the first terminal 202 can extend from the inside of the first terminal mounting opening 1011 to the outside of the housing 100, and the second terminal 203 can extend from the inside of the second terminal mounting opening 1012 to the outside of the housing 100; the number of the split structures 300 is two, and the two split structures 300 are respectively covered on the first terminal mounting hole 1011 and the second terminal mounting hole 1012, that is, the arrangement mode corresponds to a battery with tabs at two ends (two sides).

In other examples, the number of the terminal installation openings 101 may also be 1 or another suitable number, such as 3, 4 or more, for example, when the number of the terminal installation openings 101 is 1, the first tab 201 and the second tab may be located on the same side of the battery core, and thus, the first terminal 202 and the second terminal 203 may both be disposed toward the terminal installation opening 101, and both the first terminal 202 and the second terminal 203 may protrude from the terminal installation opening 101 to the outside of the casing 100, and correspondingly, the number of the split structures 300 may be 1, and 2 or more recesses 3011 may be disposed on the split structure 300, and the split structure 300 is disposed on the terminal installation opening 101, that is, this arrangement corresponds to a battery with tabs on one side.

To sum up, this application embodiment not only can be applicable to the square battery that both ends (both sides) go out utmost point ear, also can be applicable to the square battery that the unilateral goes out utmost point ear, compares in the square battery that both ends (both sides) go out utmost point ear, can further simplify the battery manufacturing procedure, reduces the manufacturing degree of difficulty of battery.

Fig. 2 is a schematic structural diagram of the split structure 300, the limiting structure 400, the connecting member 500 and the first terminal 202 in the embodiment of the present application; according to an embodiment of the present application, referring specifically to fig. 2 in conjunction with fig. 1, the separate structure 300 may include a substrate 301, the substrate 301 may be disposed to cover the terminal mounting opening 101, and the recess 3011 may be disposed on the substrate 301. Illustratively, the cover plate can be covered on the terminal mounting opening 101 by welding, bonding, screwing, or clipping, and the recess 3011 is opened on the substrate 301, e.g., at the middle of the substrate 301.

In the embodiment of the application, the substrate 301 and the concave portion 3011 thereon are arranged to simplify the cover plate structure of the conventional battery core, so as to further simplify the battery manufacturing process and reduce the manufacturing difficulty of the battery, and in addition, the first terminal 202 and the second terminal 203 extend out of the casing 100 through the concave portion 3011, so that the concave portion 3011 on the substrate 301 can also play a role in limiting the terminals.

It is understood that the cross-sectional shape of the substrate 301 may be triangular, quadrangular, pentagonal, or the like.

It will also be appreciated that the recess 3011 may be a hole, a notch, or other suitable type.

According to an embodiment of the present application, with continued reference to fig. 2 in conjunction with fig. 1, a limiting structure 400 may be provided between the substrate 301 and the terminal mounting opening 101, and the limiting structure 400 may be used to limit the movement of the first terminal 202 and/or the second terminal 203 relative to the housing 100.

The limiting structure 400 is arranged in the embodiment of the application, so that the first terminal 202 and/or the second terminal 203 are further limited, the position of the first terminal 202 and/or the second terminal 203 is prevented from changing, and the subsequent welding and other operations of the first terminal 202 and/or the second terminal 203 with the substrate 301 are facilitated.

In one embodiment of the present application, with continued reference to fig. 2 and with reference to fig. 1, the limiting structure 400 may include a limiting member 401 and a limiting fitting 402 that can abut against each other; the limiting member 401 may be disposed on a side of the substrate 301 facing the terminal mounting opening 101, the limiting member 401 may be formed with a terminal limiting space 4011, the recess 3011 may communicate with the terminal limiting space 4011, the limiting fitting 402 may be disposed on the first terminal 202 and/or the second terminal 203, and the limiting fitting 402 may be accommodated in the limiting space 4011. Illustratively, the limiting members 401 are 2, such as 2 oppositely disposed plates, and the 2 plates have a space therebetween, so as to form the terminal limiting space 4011, and the limiting fitting member 402 may also be plate-shaped, and the limiting fitting member 402 is disposed on the first terminal 202 and/or the second terminal 203 by welding, bonding, screwing, or clipping.

In other examples, the limiting member 401 may be of other suitable types, such as a "square" shape, a "hex" shape, or a "U" shape, and the limiting engagement member 402 may match the shape of the limiting member 401.

It is understood that 2 limiting members 401 are only preferred, and in other examples, the number of the limiting members 401 may be 1, 3 or more.

Fig. 3 is a schematic bottom view of a split structure 300 according to an embodiment of the present disclosure; according to an embodiment of the present application, referring specifically to fig. 3 in combination with fig. 1 and 2, a side of the substrate 301 facing the terminal mounting port 101 in the width direction W of the housing 100 may be divided into a first region 3012, a second region 3013, and a third region 3014, which are adjacent in this order, and the recess 3011 may be located in the second region 3013; the split structure 300 may further include a fastening structure 302 for fastening with an inner wall of the housing 100, and the fastening structure 302 may be connected to the substrate 301 and located in the first region 3012 and/or the second region 3013. For example, the fastening structure 302 may be 2 rectangular parallelepiped structural members, and the 2 rectangular parallelepiped structural members are oppositely disposed on the upper and lower portions of the substrate 301.

By arranging the buckling structure 302, the embodiment of the application can firstly limit the substrate 301, so that the substrate 301 can be conveniently welded with the shell 100; secondly, the connection strength between the substrate 301 and the housing 100 can be improved; third, it can act as a stop for the core 200 within the housing 100.

According to an embodiment of the present application, with continued reference to fig. 3 and combined with fig. 1 and 2, the split structure 300 may further include a reinforcing member 303, the reinforcing member 303 may be disposed to extend along the width direction W of the housing 100, and as shown in fig. 2, the reinforcing member 303 may include a first side 3031 and a second side 3032 disposed along the thickness direction T of the housing 100, the first side 3031 of the reinforcing member 303 may be attached to the limiting member 401 and the fastening structure 302, and the second side 3032 of the reinforcing member 303 may be fastened to the inner wall of the housing 100. Illustratively, the reinforcing member 303 is plate-shaped, and the limiting structure 400 and the fastening structure 302 are connected to the reinforcing member 303 by welding, bonding, screwing, or clipping.

In the embodiment of the present application, the reinforcing member 303 is disposed to enhance the stability of the limiting member 401 and the buckling structure 302.

According to an embodiment of the present application, as shown in fig. 2 to 3 in particular, a connection component 500 for connecting the fastening structure 302 and the reinforcing component 303 may be further provided between the fastening structure 302 and the reinforcing component 303; the connection member 500 may include a connection portion 501 and a connection fitting portion 502 that are detachably connected; the connecting portion 501 may be disposed on the fastening structure 302, and the connecting mating portion 502 may be disposed on the reinforcing member 303; alternatively, the connecting portion 501 may be disposed on the reinforcing member 303, and the connection mating portion 502 may be disposed on the fastening structure 302. Illustratively, the connecting portion 501 is a hole or a groove, and is disposed on the fastening structure 302, and the connecting mating portion 502 is a column, and is disposed on the reinforcing member 303 by welding, bonding, screwing, or clipping.

The embodiment of the present application provides the connecting member 500 to facilitate the detachment between the fastening structure 302 and the reinforcing member 303.

According to an embodiment of the present application, referring specifically to fig. 2, the connection portion 501 may be a mounting hole, and the connection matching portion 502 may be a protrusion, and the protrusion may be embedded in the mounting hole.

In other examples, the connecting portion 501 and the connecting mating portion 502 may be of other suitable types, such as a snap and a slot.

This application embodiment sets up to the mounting hole through connecting portion 501, connects cooperation portion 502 to set up to the arch, is not only convenient for dismantle between lock structure 302 and the reinforcing component 303, but also can improve the joint strength between lock structure 302 and the reinforcing component 303.

According to an embodiment of the present application, referring to fig. 2 and fig. 3 in combination with fig. 1, an outer edge of the split structure 300 may have an abutting surface 304, and the split structure 300 may abut against the housing 100 through the abutting surface 304. Illustratively, the retaining surface 304 may be planar.

In other examples, the abutting surface 304 may also be a curved surface.

In the embodiment of the present application, the abutting surface 304 is provided to limit the depth of the split structure 300 extending into the housing 100, so as to prevent the split structure 300 from falling into the housing 100 when the split structure 300 is covered on the terminal mounting opening 101 of the housing 100, which not only makes it impossible to fix (e.g., weld) the split structure 300 to the housing 100, but also makes it difficult to take out the split structure 300 from the housing 100.

Fig. 4 is a schematic diagram of the structure of first terminal 202 and positive engagement member 402 in an embodiment of the present application; according to an embodiment of the present application, referring to fig. 4 in particular and in combination with fig. 1, the first tab 201 may be a positive electrode, from the first terminal mounting opening 1011 of the housing 100 to the second terminal mounting opening 1012 of the housing 100, the first terminal 202 may include a first pressing plate 2021, a weak guide plate 2022 and a first snap ring 2023 stacked in sequence, the limit fitting 402 may be stacked on a side of the first snap ring 2023 facing away from the first pressing plate 2021, the first fastening member 2024 may penetrate through the first pressing plate 2021, the weak guide plate 2022, the first snap ring 2023 and the limit fitting 402, the first snap ring 2023 may abut against a side of the split structure 300 facing away from the housing 100, the first tab 201 of the core 200 may electrically connect an end of the first fastening member 2024 facing the second terminal mounting opening 1012 of the housing 100, and the first pressing plate 2021 and the weak guide plate 2022 may extend out of the housing 100. Illustratively, the first tab 201 of the core 200 is connected to an end, e.g., the right end, of the first fastening member 2024 facing the second terminal attachment opening 1012 of the housing 100 by welding, bonding, screwing, clamping, or the like.

In the embodiment of the present application, the first snap ring 2023 is disposed to limit the depth of the first terminal 202 extending out of the housing 100, the first fastening member 2024 is disposed to perform the connecting and fixing functions, and in addition, the first terminal 202 can be modularized by disposing the first fastening member 2024, so as to facilitate the assembly and disassembly of the square battery.

Fig. 5 is a schematic view of the structure of the second terminal 203 and the positive engagement member 402 according to the embodiment of the present application; according to an embodiment of the present application, referring to fig. 5 in particular and with reference to fig. 1, the second tab may be a negative electrode, from the second terminal installation opening 1012 of the housing 100 to the first terminal installation opening 1011 of the housing 100, the second terminal 203 may include a second pressing plate 2031, an insulating plate 2032 and a second snap ring 2033 stacked in sequence, the limit fitting 402 may be stacked on a side of the second snap ring 2033 facing away from the second pressing plate 2031, the second fastening member 2034 may penetrate through the second pressing plate 2031, the insulating plate 2032, the second snap ring 2033 and the limit fitting 402, the second snap ring 2033 may be supported on a side of the split structure 300 facing away from the housing 100, the second tab of the core 200 may be electrically connected to an end of the second fastening member 2034 facing the first terminal installation opening 1011 of the housing 100, and the second pressing plate 2031 and the insulating plate 2032 may extend out of the housing 100.

Reference may be made specifically to the description above relating to the first terminal 202.

It is understood that the first fastener 2024 and the second fastener 2034 may be the same or different.

It is also understood that the first fastener 2024 and the second fastener 2034 can be rivets, bolts, or other suitable types as long as the corresponding functions, actions, or effects can be achieved.

The above are only a few embodiments of the present application, and those skilled in the art can make various changes or modifications to the embodiments of the present application based on the disclosure of the application document without departing from the spirit and scope of the embodiments of the present application.

Claims (12)

1. A prismatic battery, comprising:

a housing having at least one terminal mounting opening;

the core body is arranged in the shell and comprises a first tab, a second tab, a first terminal and a second terminal, the first terminal is electrically connected with the first tab, the second terminal is electrically connected with the second tab, and the first tab and the second tab are respectively arranged towards the terminal mounting opening;

and the split structure is provided with at least one concave part, and the first terminal and the second terminal can respectively extend out of the shell from the terminal mounting port through the concave part under the condition that the first terminal and the second terminal are accommodated in the shell.

2. The prismatic battery according to claim 1,

the number of the terminal mounting openings is two, the two terminal mounting openings are respectively a first terminal mounting opening and a second terminal mounting opening which are arranged at two ends of the shell along the length direction of the shell, the first terminal is arranged towards the first terminal mounting opening of the shell, the second terminal is arranged towards the second terminal mounting opening of the shell, the first terminal can extend out of the shell from the inside of the first terminal mounting opening, and the second terminal can extend out of the shell from the inside of the second terminal mounting opening;

the split structure is two, and the two split structures are respectively covered on the first terminal mounting port and the second terminal mounting port.

3. The prismatic battery according to claim 1, wherein the split structure comprises:

and a substrate covering the terminal mounting opening, the recess being provided on the substrate.

4. The prismatic battery according to claim 3,

and a limiting structure is arranged between the substrate and the terminal mounting port and is used for limiting the first terminal and/or the second terminal to move relative to the shell.

5. The prismatic battery according to claim 4,

the limiting structure comprises a limiting part and a limiting matching part which can be mutually abutted;

the locating part sets up the base plate is towards on one side of terminal installing port, the locating part is formed with the spacing space of terminal, the concave part intercommunication the spacing space of terminal, spacing fitting piece sets up first terminal and/or on the second terminal, just spacing fitting piece accept in the spacing space.

6. The prismatic battery according to claim 5,

the side of the substrate facing the terminal mounting opening is divided into a first area, a second area and a third area which are adjacent in sequence along the width direction of the shell, and the concave part is positioned in the second area;

the split structure further comprises a buckling structure used for buckling with the inner wall of the shell, and the buckling structure is connected to the substrate and located in the first area and/or the second area.

7. The prismatic battery according to claim 6, wherein the split structure further comprises:

the reinforcing part is arranged in an extending mode in the width direction of the shell and comprises a first side and a second side, the first side of the reinforcing part is attached to the limiting part and the buckling structure, and the second side of the reinforcing part is buckled on the inner wall of the shell.

8. The prismatic battery according to claim 7,

a connecting part for connecting the buckling structure and the reinforcing part is also arranged between the buckling structure and the reinforcing part;

the connecting part comprises a connecting part and a connecting matching part which can be detachably connected;

the connecting part is arranged on the buckling structure, and the connecting matching part is arranged on the reinforcing component; alternatively, the first and second electrodes may be,

the connecting part is arranged on the reinforcing part, and the connecting matching part is arranged on the buckling structure.

9. The prismatic battery according to claim 8,

the connecting part is a mounting hole, the connecting matching part is a protrusion, and the protrusion is embedded in the mounting hole.

10. The prismatic battery according to claim 1,

the outer edge of the split structure is provided with a butting surface, and the split structure butts against the shell through the butting surface.

11. The prismatic battery according to any one of claims 5 to 9,

the first tab is a positive electrode, from a first terminal mounting port of the shell to a second terminal mounting port of the shell, the first terminal comprises a first pressing plate, a weak guide plate and a first retaining ring which are sequentially overlapped, the limiting fitting piece is overlapped and arranged on one side, deviating from the first retaining ring, of the first pressing plate, a first fastener penetrates through the first pressing plate, the weak guide plate, the first retaining ring and the limiting fitting piece, the first retaining ring supports and holds the split structure deviating from one side of the shell, the first tab of the core is electrically connected with the first tab, the first fastener faces towards one end of the second terminal mounting port of the shell, and the first pressing plate and the weak guide plate extend out of the shell.

12. The prismatic battery according to any one of claims 5 to 9,

the second tab is a negative electrode, from a second terminal mounting port of the shell to a first terminal mounting port of the shell, the second terminal comprises a second pressing plate, an insulating plate and a second snap ring which are sequentially overlapped, the limiting fitting piece is overlapped and arranged on one side, deviating from the second pressing plate, of the second snap ring, the second fastener penetrates through the second pressing plate, the insulating plate, the second snap ring and the limiting fitting piece, the second snap ring is abutted to the split structure and deviates from one side of the shell, the second tab of the core is electrically connected with the second fastener, faces towards one end of the first terminal mounting port of the shell, and the second pressing plate and the insulating plate stretch out of the shell.

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