CN211719688U

CN211719688U - Multi-terminal battery

Info

Publication number: CN211719688U
Application number: CN202020317368.1U
Authority: CN
Inventors: 刘金成; 舒宽金; 袁中直; 祝媛; 何巍; 吕正中
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-10-20
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a multi-terminal battery, including at least one apron, be provided with at least one terminal subassembly on the apron, the terminal subassembly includes insulating part and two at least terminals, and a plurality of terminals set up on the insulating part and by insulating part mutual isolation, a plurality of terminals are connected with a plurality of utmost point ears that set up on a plurality of core packages of battery inside. The current is divided by arranging a plurality of independent terminals, and a single terminal only needs to bear partial current instead of all current, so that the requirement on the overcurrent capacity of the single terminal is low, the size of the terminal can be set to be small, less internal space of the battery is occupied, and the battery has larger capacity. The structure of many terminals makes the point of converging of electric current produce outside the battery, and the inside parallelly connected utmost point ear quantity significantly reduces of battery or does not have parallelly connected utmost point ear to reduced the inside temperature rise of battery, improved the security of battery, just the utility model discloses a structure and the conventional battery structure difference of many terminals battery are little, and the cost is effectively controlled.

Description

Multi-terminal battery

Technical Field

The utility model relates to a battery manufacturing technology field especially relates to a multi-terminal battery.

Background

General battery only has a positive terminal and a negative terminal, a plurality of utmost point ear on the battery inner core package is connected with a plurality of connecting piece, a plurality of connecting pieces are connected on the terminal with parallelly connected mode, the electric current converges to the terminal on by a plurality of connecting pieces, make the terminal bear great electric current, and parallelly connected electric current causes the department's of converging high heat yield when converging, the junction temperature rise that makes terminal and connecting piece is very fast, the heat of production is piled up inside the battery, be difficult for the diffusion, the inside thermal runaway risk of battery has been increased, the security performance of battery has been reduced. Along with the increase of the size and the increase of the capacity of the battery, the requirements on the overcurrent capacity and the temperature rise of a battery terminal are higher and higher, and particularly, the power battery, the large-size and large-energy battery are more applied.

Generally, the method for improving the overcurrent capacity and reducing the temperature rise is to increase the sizes of the positive and negative terminals and the connecting part of the battery, that is, the length, the width and the thickness of the terminals are increased, the sectional area of the connecting part is increased, the improvement of the overcurrent capacity of the terminals and the connecting part is realized, and the temperature rise is reduced. However, the overcurrent capacity and the temperature rise are improved and reduced only by increasing the sizes of the terminals and the connecting parts, so that the utilization rate of the internal space of the battery is reduced, and the capacity of the battery is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-terminal battery, it is provided with a plurality of terminals, and capacious and security are high.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a multi-terminal battery, includes at least one apron, be provided with at least one terminal subassembly on the apron, the terminal subassembly includes insulator and two at least terminals, a plurality of the terminal sets up on the insulator and by insulator mutual isolation, a plurality of the terminal is connected with a plurality of utmost point ears that set up on a plurality of core packages inside the battery.

As an optimized scheme of the utility model, the terminal with utmost point ear one-to-one is connected.

As a preferred scheme of the utility model, the inside of battery is provided with a plurality of connecting pieces, and is a plurality of the equal interval of connecting piece sets up and mutual insulation, the one end of connecting piece with the terminal is connected, the other end of connecting piece with utmost point ear is connected.

As a preferred scheme of the utility model, the terminal includes main part and spliced pole, the spliced pole is protruding to be established in the main part and orientation the inside of battery, the locating hole has been seted up on the connecting piece, the spliced pole passes the locating hole.

As a preferred scheme of the utility model, the connecting piece includes first segmentation and second segmentation, first segmentation with the terminal is connected, the second segmentation with utmost point ear is connected, first segmentation with be the contained angle between the second segmentation and connect, the contained angle is 0 ~ 180 degrees.

As a preferred scheme of the utility model, it is a plurality of the terminal sets up side by side on the insulating part, adjacent two form first gap between the terminal and by the insulating part is filled, and is a plurality of first segmentation sets up side by side, adjacent two form the second gap between the first segmentation, first gap with second gap parallel arrangement or be the contained angle setting.

As a preferred embodiment of the present invention, the positioning hole is disposed at an end of the first segment away from the second segment, the first gap is perpendicular to the second gap, and the lengths of the first segments are different;

or the first gap and the second gap are arranged in parallel, and the lengths of the first sections are the same.

As a preferred scheme of the utility model, the multiple-terminal battery still includes the conducting strip, the conducting strip includes the branch contact that a plurality of intervals set up, and is a plurality of branch contact is with a plurality of the terminal deviates from one side of core package is connected.

As an optimized scheme of the utility model, the branch contact with the terminal one-to-one is connected.

As a preferred scheme of the present invention, the cover plate is one, the terminal assembly includes a positive terminal assembly and a negative terminal assembly, and both the positive terminal assembly and the negative terminal assembly are disposed on the cover plate;

or, the number of the cover plates is two, the terminal assemblies comprise a positive terminal assembly and a negative terminal assembly, the two cover plates are respectively arranged on two opposite sides of the shell of the multi-terminal battery, the positive terminal assembly is arranged on one of the cover plates, and the negative terminal assembly is arranged on the other cover plate.

The utility model has the advantages that:

the utility model discloses a multi-terminal battery shunts the electric current through set up a plurality of independent terminals on the apron, and single terminal only need bear partial current, and not whole electric current, consequently requires lowerly to the ability of overflowing of single terminal, and less that the size of terminal can set up occupies less battery inner space to increase the capacity of battery. The multi-terminal structure enables the current converging point to be generated outside the battery, the number of the lugs connected in parallel inside the battery is greatly reduced or the lugs connected in parallel are not generated at all, so that the temperature rise inside the battery is effectively reduced, and the safety of the battery is improved. Because the confluence point of the current is generated outside the battery, the temperature collector can be conveniently arranged on the confluence point, and the temperature of the battery during large-current charging and discharging is effectively monitored. The utility model discloses a structure and the conventional battery structure difference of multi-terminal battery are little, need not to add too much extra manufacture equipment, and the cost is effectively controlled.

Drawings

Fig. 1 is a front view of a terminal according to an embodiment of the present invention;

fig. 2 is a schematic view of the terminal of fig. 1 disposed on an insulator in accordance with an embodiment of the present invention;

fig. 3 is a top view of the conductive sheet according to the embodiment of the present invention connected to the terminal of fig. 1;

fig. 4 is a plan view of a terminal assembly of an embodiment of the present invention disposed on a cover plate;

fig. 5 is a front view of a connector according to an embodiment of the present invention;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a side view of FIG. 5;

fig. 8 is a front view of a connector according to an embodiment of the present invention;

FIG. 9 is a top view of FIG. 8;

fig. 10 is a top view of a battery according to some embodiments of the present invention;

fig. 11 shows an arrangement of connectors inside the battery of the embodiment of fig. 10;

FIG. 12 is a side view of FIG. 11;

FIG. 13 is another arrangement of the connection members within the battery of the embodiment of FIG. 10;

fig. 14 is a top view of a battery according to further embodiments of the present invention;

fig. 15 is a schematic cross-sectional view of a battery according to further embodiments of the present invention;

fig. 16 is a side view of the battery of the embodiment of fig. 15.

In the figure:

1. a terminal; 11. a main body; 12. connecting columns; 2. an insulating member; 3. a connecting member; 31. a first segment; 311. Positioning holes; 32. a second section; 4. a conductive sheet; 41. a branch contact sheet; 5. a cover plate; 6. a housing; 100. A first slit; 200. a second slit.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As shown in fig. 1, 2 and 10, the multi-terminal battery of the present embodiment includes a cover plate 5, two terminal assemblies are disposed on the cover plate 5, each terminal assembly includes three terminals 1 and an insulator 2, the three terminals 1 are disposed on the insulator 2, and the terminals 1 are isolated from each other by the insulator 2 and connected to tabs (not shown) on a core package (not shown) inside the battery. In this embodiment, one of the two terminal assemblies is a positive terminal assembly, and the other is a negative terminal assembly.

The battery of this embodiment divides the current by arranging three independent terminals 1 on the cover plate 5, and a single terminal 1 only needs to bear part of the current, not all the current, so the requirement on the overcurrent capacity of the single terminal 1 is lower, the size of the terminal 1 can be smaller, and less internal space of the battery is occupied, thereby the capacity of the battery is increased. Because the plurality of terminals 1 are adopted, the current converging point can be arranged outside the battery, the number of the lugs connected in parallel inside the battery is greatly reduced or the lugs connected in parallel are not arranged at all, so that the temperature rise inside the battery is well controlled, and the safety of the battery is improved. Because the confluence point of the current is generated outside the battery, the temperature collector can be conveniently arranged on the confluence point, and the temperature of the battery during large-current charging and discharging is effectively monitored. In addition, the structure of the multi-terminal battery of the embodiment has small difference with the structure of the conventional battery, excessive additional manufacturing equipment is not needed, and the cost is effectively controlled.

In other embodiments, each terminal assembly may include two or four or more terminals 1, and the number of terminals 1 is determined according to the number of core packs in the battery and the number of tabs of the core pack. One terminal 1 can be connected with two lugs, namely the two lugs are connected in parallel, so that the current of only two lugs is converged on one terminal 1, and the generated heat is less.

Preferably, one terminal 1 is connected with only one tab, so that no tab connected in parallel is arranged in the battery, current convergence does not occur, the heat generation amount in the battery is reduced to the maximum extent, and the safety of the battery is improved.

As shown in fig. 5 to 15, preferably, a plurality of connection members 3 are provided inside the battery, the connection members 3 are spaced apart from each other and insulated from each other, one end of each connection member 3 is connected to the terminal 1, and the other end of each connection member 3 is connected to the tab. Under normal conditions, a certain distance exists between the terminal 1 and the tab, the terminal 1 and the tab cannot be directly connected, and the tab and the terminal 1 can be effectively electrically connected by means of the connecting piece 3.

Preferably, as shown in fig. 1, the terminal 1 includes a main body 11 and a connection post 12, the main body 11 is disposed on the cover plate 5 of the battery, the connection post 12 is protruded on the main body 11 and faces the inside of the battery, as shown in fig. 5 to 7, a positioning hole 311 is formed on the connection member 3, and the connection post 12 passes through the positioning hole 311. The more and less size of a quantity of connecting piece 3, it still keeps apart each connecting piece 3 each other still to guarantee, when connecting piece 3 and terminal 1 adopted welded connected mode, need carry out comparatively accurate location to connecting piece 3 earlier, because main part 11 sets up on insulating part 2, welded position is limited, and spliced pole 12 protrusion in insulating part 2's surface, spliced pole 12 not only provides the setpoint for connecting piece 3 but also provides the welding point location, thereby make things convenient for the welding of connecting piece 3 and terminal 1.

The material of the terminal 1 and the connecting member 3 may be metal material, conductive organic material (such as conductive plastic), conductive inorganic material (such as conductive ceramic, conductive glass, carbon conductive material), and the insulating member 2 may be insulating inorganic material (ceramic, glass), insulating organic material (fluororubber, PP, PET, PI).

Specifically, the material selected by the connecting piece 3 can be a composite metal material formed by randomly combining three materials of pure copper, pure aluminum, a nickel sheet and copper-aluminum-nickel.

Preferably, the main body 11 and the connecting post 12 are manufactured by a cold heading process, and when the terminal 1 is made of a metal material, the main body 11 and the connecting post 12 have high precision by the cold heading process. The terminal 1 can also be made of non-metallic material.

Further, the connection mode of the main body 11 and the connection column 12 can be realized by riveting, laser welding, friction welding, brazing, and the like.

Preferably, when the insulating member 2 is made of plastic material, such as PP or PPs, the insulating member 2 is injection molded, and the injection molding can be performed on the terminal 1 with irregular shape to obtain the insulating member 2 with complicated shape, thereby improving the manufacturing efficiency of the insulating member 2 and reducing the manufacturing cost.

Optionally, the insulating member 2 may also be made of a non-plastic material, and may be manufactured by other machining methods, such as CNC machining, ceramic sintering, plastic molding, and the like.

As shown in fig. 11 and 12, in some embodiments, the connecting member 3 includes a first segment 31 and a second segment 32 arranged at an included angle, a positioning hole 311 is opened at an end of the first segment 31 away from the second segment 32, the first segment 31 is connected with the terminal 1, and the second segment 32 is connected with the tab. Because the distance is usually kept between the pole ear in the core bag and the terminal 1, and the pole ear setting positions and the number of different types of core bags can be different, the second section 32 can set corresponding length according to the specific position of the pole ear, and adapts to the setting position of the pole ear by forming a specific included angle with the first section 31 and is better connected with the pole ear. The included angle between the first section 31 and the second section 32 is 0-180 degrees, when the included angle is 180 degrees, the first section 31 and the second section 32 are integrated, the connecting piece 3 is flat and straight, and bending does not exist, as shown in fig. 13 and 15.

As shown in fig. 1, fig. 2 and fig. 9, further, a plurality of terminals 1 are arranged side by side on the insulating member 2, a first gap 100 is formed between two adjacent terminals 1 and filled by the insulating member 2, a plurality of first segments 31 are arranged side by side, a second gap 200 is formed between two adjacent first segments 31, and the first gap 100 and the second gap 200 are arranged in parallel or at an included angle. As shown in fig. 10 and 14, the arrangement direction of the plurality of terminals 1 on the cover plate 5 may have different forms, the arrangement position of the combined tab may be one connecting member 3 may be located below only one terminal 1, and a situation may occur where one connecting member 3 is located below a plurality of terminals 1. When a connecting piece 3 is positioned below a plurality of terminals 1, the first gap 100 and the second gap 200 form an included angle, and the insulating piece 2 isolates the connecting piece 3 from the main bodies 11 of the terminals 1, so that one connecting piece 3 is only connected with the connecting column 12 of one terminal 1, and an independent current channel is realized, wherein one lug corresponds to one connecting piece 3, and one connecting piece 3 corresponds to one terminal 1.

Specifically, in some embodiments, the first slit 100 and the second slit 200 are perpendicular to each other, the connecting element 3 is disposed as shown in fig. 8 and 9, and the connecting post 12 of each terminal 1 is spaced from the second segment 32 of the connecting element 3 connected thereto, and the length of each first segment 31 is different, so that the position of the positioning hole 311 matches the position of the connecting post 12.

In other embodiments, the first slit 100 and the second slit 200 are parallel to each other, one connector 3 is located below only one terminal 1, and the lengths of the first sections 31 are equal because the connecting column 12 of each terminal 1 is equidistant from the second section 32 of the connector 3 connected thereto. The embodiment shown in fig. 13 employs this configuration.

Preferably, the core package is a winding type or a laminated type, the number of the core package is at least one, the number of the tabs of a single core package is set according to actual requirements, and different numbers and types of core packages can be set according to the size of the battery shell 6 to obtain batteries with different capacities.

As shown in fig. 3 and 4, preferably, the terminals 1 are provided with the conductive sheets 4, the conductive sheets 4 are used for collecting the current of each terminal 1, and the conductive sheets 4 are further provided with a temperature collector conveniently, so as to effectively monitor the highest temperature of the battery during high-current charging and discharging.

Specifically, the conductive sheet 4 includes a plurality of branch contacts 41 arranged at intervals, and this structure can reduce the overall volume and weight of the conductive sheet 4. Preferably, the branch contact pieces 41 are connected with the terminals 1 in a one-to-one correspondence manner, so that the confluence point of current is far away from each terminal 1, and the temperature of the battery is less influenced by high temperature generated at the confluence point.

In other embodiments, as shown in fig. 15 and 16, the number of the cap plates 5 is two, two cap plates 5 are respectively disposed on opposite sides of the case 6 of the battery, and the positive terminal assembly and the negative terminal assembly are respectively disposed on one of the cap plates 5. The battery case having any one of the above structures may be used according to the distribution of the tabs inside the battery.

As a preferred embodiment of the present invention, in the description of the present specification, reference to the description of the terms "preferred", "further" or the like means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only used to illustrate the detailed embodiments of the present invention, and the present invention is not limited to the above detailed embodiments, i.e. the present invention must not be implemented depending on the detailed embodiments. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. The multi-terminal battery is characterized by comprising at least one cover plate, wherein at least one terminal assembly is arranged on the cover plate and comprises an insulating piece and at least two terminals, the terminals are arranged on the insulating piece and are mutually isolated by the insulating piece, and the terminals are connected with a plurality of lugs arranged on a plurality of core packages in the battery.

2. The multi-terminal battery of claim 1, wherein the terminals are connected in a one-to-one correspondence with the tabs.

3. The multi-terminal battery as claimed in claim 1, wherein a plurality of connecting members are provided inside the battery, the connecting members are spaced apart and insulated from each other, one end of each connecting member is connected to the terminal, and the other end of each connecting member is connected to the tab.

4. The multi-terminal battery of claim 3, wherein the terminal comprises a main body and a connection post protruding from the main body and facing the inside of the battery, the connection member having a positioning hole formed therein, the connection post passing through the positioning hole.

5. The multi-terminal battery of claim 4, wherein the connector includes a first segment and a second segment, the first segment is connected to the terminal, the second segment is connected to the tab, and the first segment and the second segment are connected at an included angle of 0-180 degrees.

6. The multi-terminal battery of claim 5, wherein a plurality of said terminals are disposed side-by-side on said insulator, a first gap is formed between two adjacent terminals and filled by said insulator, a plurality of said first segments are disposed side-by-side, a second gap is formed between two adjacent first segments, and said first gaps and said second gaps are disposed in parallel or at an angle.

7. The multi-terminal battery of claim 6, wherein the positioning hole is formed at an end of the first segment away from the second segment, the first slit is perpendicular to the second slit, and the first segments are different in length;

8. The multi-terminal battery of any one of claims 1-7, further comprising a conductive sheet comprising a plurality of spaced apart branch contacts, the plurality of branch contacts being connected to a side of the plurality of terminals facing away from the core pack.

9. The multi-terminal battery of claim 8, wherein the branch contacts are connected in a one-to-one correspondence with the terminals.

10. The multi-terminal battery of any one of claims 1-7, wherein there is one cover plate, the terminal assemblies include a positive terminal assembly and a negative terminal assembly, both disposed on the cover plate;