CN217507602U - Battery post and battery cover plate component - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery post and a battery cover plate component, wherein the battery post comprises a base plate and a connecting post, the base plate is made of aluminum plate, and the base plate is arranged outside the battery and is used for being connected with a circuit outside the battery; the connecting column is made of a copper plate, one end of the connecting column is fixedly connected with the substrate, and the other end of the connecting column is used for being connected with an electric core inside the battery. The battery pack has the advantages of good overcurrent capacity, lower risk of structural failure, higher safety and capability of saving the space of the battery pack.

Description

Battery post and battery cover plate component

Technical Field

The utility model relates to a battery technology field especially relates to a battery utmost point post and battery cover plate subassembly.

Background

The battery pole is an important part communicating the inside and the outside of the battery in the battery, one end of the battery pole is connected with an external circuit of the battery, and the other end of the battery pole is connected with an internal battery core of the battery, so that the battery can realize the charge and discharge functions.

Currently, as shown in fig. 1, most of the battery terminals are composite terminals, i.e. the battery terminals have a copper substrate 1 and an aluminum connection post 3. In the process of making the battery pole, firstly, the aluminum material and the copper material are cut into small aluminum plates and small copper plates, the cut aluminum plates and the cut copper plates are combined together through friction welding to form a copper-aluminum composite part, each battery pole needs to be welded independently, the copper-aluminum composite part is processed into a required battery pole shape, when friction welding is adopted, one-time clamping can only process one battery pole, and the processing efficiency is low. Structurally, the copper/aluminum joint surface is influenced by the rebound force of the sealing ring and is always in a stressed state, so that the risk of fracture failure exists.

In the prior art, when a battery pole is used, a connecting column is arranged outside the battery and is connected with an external circuit of the battery, a substrate is arranged inside the battery and is connected with an electric core in the battery, when the battery is used, the connecting column needs to be welded with the external circuit of the battery, but the end face of the connecting column needs to avoid a riveting area of the terminal/the connecting column when being welded, so that the utilization rate of the area of the end face is reduced, the volume of the terminal is larger, and excessive battery pack space is occupied; meanwhile, when the copper-aluminum junction surface is in the battery cell (the sealing ring is used as the inner/outer limit of the battery cell), the copper plate is limited by electrochemistry, aluminum materials cannot be remained on the copper plate, so that the area of the copper/aluminum junction surface can only be the diameter of the connecting column to the maximum extent, the overcurrent capacity of the aluminum materials is far smaller than that of the copper materials, and the overall overcurrent capacity is weak. With the development of society and the progress of battery technology, people have higher and higher requirements on the charge and discharge multiplying power of batteries, when the overcurrent capacity is weaker, a battery pole generates a large amount of heat and conducts the heat to the whole battery, so that the electrical performance and the safety performance of the battery are seriously influenced, and even the thermal runaway of the battery can be caused, so that the sectional area of the battery pole needs to be increased in order to meet the requirement on higher charge and discharge multiplying power of the battery, but the volume and the cost of a battery pack are increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery utmost point post and battery cover plate subassembly can have better ability of overflowing, and the structural failure risk is lower, and is safer, also can practice thrift the space of battery package simultaneously.

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

a battery post, comprising:

the base plate is made of an aluminum plate, is arranged outside the battery and is used for being connected with a circuit outside the battery;

the spliced pole, the spliced pole adopts the copper to make, spliced pole one end with base plate fixed connection, the other end be used for with battery inside electricity core is connected.

Preferably, the base plate and the connecting column are made of copper-aluminum composite plates.

Preferably, the aluminum plate and the copper plate are combined into the copper-aluminum composite plate by hot rolling.

Preferably, the surface of the aluminum plate is provided with a through groove, the width of the through groove is equal to that of the copper plate, and the copper plate is placed in the through groove during hot rolling.

Preferably, the depth of the through groove is equal to the thickness of the copper plate.

Preferably, the depth of the through groove is smaller than the thickness of the copper plate.

The utility model provides a battery cover plate assembly, includes above-mentioned battery utmost point post, still includes the apron, be provided with first mounting hole on the apron, the apron passes through first mounting hole cover is located on the spliced pole, the spliced pole with be provided with the sealing member between the apron, the spliced pole with be provided with external insulation plastic between the apron, the spliced pole is kept away from the end of base plate is connected with electrically conductive base block, electrically conductive base block with be provided with the internal insulation plastic between the apron.

Preferably, the connection column includes a first column and a second column extending toward the inside of the battery, the first column is used for being connected with the first mounting hole, the conductive base block is provided with a second mounting hole, and the second column is used for being connected with the second mounting hole.

Preferably, a surface of the sealing member adjacent to the substrate is provided with a sealing ring, and the sealing ring is inserted between the first mounting hole and the first cylinder.

As preferred, its characterized in that, electrically conductive base block is kept away from the surface of apron has seted up the groove of stepping down, the end of second cylinder is arranged in the inslot of stepping down, electrically conductive base block is provided with the unfilled corner, the internal insulation plastic including with the guide limit of unfilled corner adaptation.

The utility model has the advantages that:

the base plate is arranged outside the battery and connected with the external circuit of the battery, and the connecting column is arranged inside the battery and connected with the electric core inside the battery; compare in the condition of original spliced pole as battery utmost point post terminal in the battery outside, the utility model provides a base plate has increased the utilization ratio of the surface area of compound utmost point post, has increased the area of copper aluminium faying face, has effectively reduced the terminal volume, and increase throughput capacity, the structural failure risk is lower, and is safer, also can practice thrift the space of battery package simultaneously.

The utility model provides a battery cover plate subassembly, be connected of battery utmost point post and apron, realize through the spliced pole completely, the spliced pole is through first mounting hole and cover connection promptly, sealing member and outer insulation plastic all are used in on the spliced pole, the effect of inner insulation plastic lies in on the electrically conductive base block that the spliced pole is connected, make the installation of battery utmost point post and apron fixed, the complete action is on this single atress body of spliced pole, can not some effect on the base plate, some is used in on the spliced pole, do not atress between the faying face of base plate and spliced pole, the condition of disconnection is located to the faying face of having stopped base plate and spliced pole from structural takes place, improve the structural strength and the life of battery terminal.

Drawings

FIG. 1 is a schematic diagram of a prior art battery post;

fig. 2 is a schematic structural view of a battery post according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a copper-aluminum composite plate of a battery post according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a battery cover plate assembly according to an embodiment of the present invention;

fig. 5 is an exploded view of a battery cover plate assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a sealing member of a battery cover plate assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a copper-aluminum composite plate of a battery post in the second embodiment of the present invention.

In the figure:

1. a substrate; 2. an aluminum plate; 21. a through groove; 3. connecting columns; 31. a first column; 32. a second cylinder; 4. a copper plate; 5. a cover plate; 51. a first mounting hole; 52. external insulation plastic cement; 521. a convex ring; 522. a first flange; 53. internal insulation plastic cement; 531. a guide edge; 532. a second flange; 6. a seal member; 61. a seal ring; 7. a conductive base block; 71. a second mounting hole; 72. a yielding groove; 73. and (5) lacking corners.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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 first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

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

The first embodiment is as follows:

as shown in fig. 2, the present embodiment provides a battery post, which includes a substrate 1 and a connection post 3, wherein the substrate 1 is made of an aluminum plate 2, and the substrate 1 is disposed outside the battery and is used for being connected to a circuit outside the battery; the connecting column 3 is made of a copper plate 4, one end of the connecting column 3 is fixedly connected with the substrate 1, and the other end of the connecting column is used for being connected with an electric core inside the battery. The battery post structure in the utility model is completely opposite to the battery post structure in the prior art, the surface of the substrate 1 as the terminal surface of the battery post is an integral plane, when the battery post is connected with the external circuit of the battery by welding, the integral area of the substrate 1 is smaller under the condition of keeping the welding area of the substrate 1 unchanged, and the space of the battery pack is saved; compare in the condition of original spliced pole 3 outside as battery utmost point post terminal of battery, the utility model provides a base plate 1 has increased the surface area of compound utmost point post, has effectively improved the ability of overflowing on compound utmost point post surface.

As shown in fig. 3, the battery pole is a copper-aluminum composite pole, the substrate 1 and the connecting column 3 are made of copper-aluminum composite plates, and the copper plate 4 and the aluminum plate 2 are compounded into the copper-aluminum composite plate through friction welding or hot rolling and other processes. In this embodiment, the copper-aluminum composite plate is made of an aluminum plate 2 and a copper plate 4 by hot rolling. Hot rolling refers to rolling performed at a temperature above the metal recrystallization temperature, and rolling is a material processing method in which a rolled piece is dragged between rolls by friction force of rotating rolls, and the rolled piece is compressively deformed between two rolls or between two or more rolls by pressure applied by the rolls. The copper-aluminum composite board serving as one novel composite material has the advantages of copper such as electric conductivity, high thermal conductivity, low contact resistance, attractive appearance and the like, and has the advantages of aluminum such as light weight, corrosion resistance, economy and the like. The copper-aluminum composite board produced by adopting the rolling composite technology has the comprehensive properties of low junction surface transition resistance and thermal impedance, corrosion resistance, durability, good ductility and formability and the like. Specifically, through groove 21 has been seted up on aluminum plate 2 surface, and the width that leads to groove 21 equals with the width of copper 4, places aluminum plate 2 in leading to groove 21 during the hot rolling, and in this embodiment, the degree of depth that leads to groove 21 equals copper 4 thickness for copper 4 places behind leading to groove 21, and aluminum plate 2's surface flushes with the surface of copper 4. With copper 4 embedding in aluminum plate 2, saved the consumptive material of copper product, improved material utilization.

When the copper-aluminum composite plate is manufactured, the copper plate 4 and the aluminum plate 2 are firstly processed to a temperature higher than the metal recrystallization temperature, then the copper plate 4 and the aluminum plate 2 are put into a rolling machine together, because the surface of the aluminum plate 2 is flush with the surface of the copper plate 4, in the hot rolling process, the aluminum plate 2 and the copper plate 4 can be easily moved between rollers and processed, and the production process is simple. The hot-rolled copper-aluminum composite plate has high productivity and mature hot rolling process, and can realize continuous hot rolling of the plate. The copper aluminum composite board that the hot rolling finishes is cut into suitable length, and this suitable length makes the copper aluminum composite board after cutting can be processed into a plurality of battery utmost point posts, cuts the back that finishes, and the shape of reuse numerical control lathe equipment processing play base plate 1 and spliced pole 3, and the numerical control lathe clamping was once again this moment, can process out a plurality of continuous battery utmost point posts on a copper aluminum composite board, and numerical control lathe processing finishes the back, carries out simple cutting again with a plurality of continuous battery utmost point posts and can obtain a plurality of battery utmost point posts. The numerical control lathe is one of the comparatively extensive digit control machine tools of use, it mainly used axle type part or the interior outer cylindrical surface of dish type part, the interior outer conical surface of arbitrary cone angle, the cutting process such as complicated gyration internal and external curved surface and cylinder, circular cone screw thread to can carry out grooving, drilling, reaming and bore hole, be fit for very much here with copper aluminium composite sheet processing for a plurality of battery utmost point posts, when processing at the digit control lathe, can process out the reserve tank or reserve line between two adjacent battery utmost point posts, be convenient for later stage cut battery utmost point post. Friction welding in the prior art needs to cut aluminum materials and copper materials into small aluminum plates 2 and small copper plates 4, the cut aluminum plates 2 and the cut copper plates 4 are combined together through friction welding to form a copper-aluminum composite part, each battery pole column needs to be welded once independently, the copper-aluminum composite part is processed into a needed battery pole column shape, and when friction welding is adopted, only one battery pole column can be processed through one-time clamping. Compared with friction welding in the prior art, the copper-aluminum composite plate for manufacturing the battery pole in the embodiment is processed by hot rolling and combination, so that the manufacturing cost can be reduced, and the productivity in unit time can be improved.

The following describes the implementation principle of the battery post of the present embodiment: the copper-aluminum composite board is obtained through hot rolling, the battery pole is obtained through processing of a numerical control lathe, the surface of the substrate 1 serving as the surface of the terminal of the battery pole is an integral plane, and when the battery pole is connected with an external circuit of a battery through welding, the integral size of the substrate 1 is smaller under the condition that the welding area of the substrate 1 is kept unchanged, so that the space of a battery pack is saved; compare in the condition of original spliced pole 3 as battery utmost point post terminal in the battery outside, the utility model provides a base plate 1 has increased compound utmost point post's surface area's utilization ratio, compares in prior art the structure of figure 1, and copper aluminium faying face area in this embodiment increases by a wide margin, and the ability of overflowing of copper product is greater than the aluminum product again to under the condition that does not change compound utmost point post size, effectively improved compound utmost point post's ability of overflowing, effectual reduction cost of manufacture improves the productivity in the unit interval.

The embodiment further provides a battery cover plate assembly, as shown in fig. 4, including the above-mentioned battery post, still include apron 5, be provided with first mounting hole 51 on the apron 5, the apron 5 is located on spliced pole 3 through first mounting hole 51 cover, be provided with sealing member 6 between spliced pole 3 and the apron 5, be provided with external insulation plastic 52 between spliced pole 3 and the apron 5, the end that base plate 1 was kept away from to spliced pole 3 is connected with electrically conductive base block 7, be provided with internal insulation plastic 53 between electrically conductive base block 7 and the apron 5.

The battery utmost point post is connected with apron 5, realize completely through spliced pole 3, spliced pole 3 is connected with apron 5 through first mounting hole 51 promptly, sealing member 6 and outer insulation plastic 52 all act on spliced pole 3, inner insulation plastic 53 is used in on the electrically conductive base block 7 that spliced pole 3 connects, make the installation of battery utmost point post and apron 5 fixed, act on this single atress body of spliced pole 3 completely, can partly not act on base plate 1, partly act on spliced pole 3, do not receive the force between the faying face of base plate 1 and spliced pole 3, the condition of disconnection is located to the faying face of having stopped base plate 1 and spliced pole 3 from structural, improve the structural strength and the life of battery terminal.

The spliced pole 3 is including the first cylinder 31 and the second cylinder 32 of inside extension of directional battery, the axis coincidence of first cylinder 31 and second cylinder 32, and the diameter of first cylinder 31 is greater than the diameter of second cylinder 32, and first cylinder 31 is used for being connected with first mounting hole 51, realizes spliced pole 3 and the being connected of apron 5.

The outer insulating plastic 52 is provided with the bulge loop 521 that inserts first mounting hole 51, and outer insulating plastic 52 still is provided with the first bulge 522 to the outside extension of battery, and the outer wall of base plate 1, first cylinder 31 all carries out radial spacing to the battery utmost point post with the inner wall butt of first bulge 522, outer insulating plastic 52.

As shown in fig. 5 and 6, in the present embodiment, the sealing member 6 is a sealing ring, and a sealing ring 61 is disposed on a surface of the sealing member 6 close to the substrate 1, and the sealing ring 61 can be inserted between the first mounting hole 51 and the first cylinder 31 to perform a further sealing function. Preferably, the diameter of the sealing ring 61 is larger than the diameter of the inner ring of the sealing element 6, so that the sealing ring 61 divides the end face of the sealing element 6 into two parts, the end face close to the inner ring of the sealing element 6 is used for abutting against the end face of the first main body, and the end face close to the outer ring of the sealing element 6 is used for abutting against the end face of the cover plate 5, so that the sealing effect of the sealing element 6 is better.

Electrically conductive base block 7 is provided with second mounting hole 71, second cylinder 32 is used for being connected with second mounting hole 71, electrically conductive base block 7 is kept away from the surface of apron 5 and has been seted up the groove of stepping down 72, the end of second cylinder 32 is arranged in the groove of stepping down 72, the groove of stepping down 72 leaves the space of processing and installation error for battery post and electrically conductive base block 7, avoid the outstanding surface of electrically conductive base block 7 of terminal surface of battery post and withstand utmost point ear, the groove of stepping down 72 also provides the space that the welding seam that second cylinder 32 and electrically conductive base block 7 produced when the welding was placed.

The internal insulation rubber is pressed between the conductive base block 7 and the cover plate 5, the second convex edge 532 extending towards the inside of the battery is arranged on the internal insulation rubber, and the inner wall of the second convex edge 532 is abutted against the outer wall of the conductive base block 7 to limit the conductive base block 7. Because the conductive base block 7 is provided with the receding groove 72, during assembly, the receding groove 72 is ensured to face the inside of the battery, but because the receding groove 72 has a small structural size and is not easy to identify, the unfilled corner 73 is provided at the edge of the conductive base block 7, the inner insulating plastic 53 comprises a guiding edge 531 matched with the unfilled corner 73, and the guiding edge 531 belongs to a part of the second flanged edge 532. Due to the guiding edge 531, the conductive base block 7 must be installed by aligning the notch 73 with the guiding edge 531, so that the offset groove 72 is just facing the inside of the battery after installation. The unfilled corner 73 plays the fool-proof role, on one hand, has the fool-proof role in the positive and negative directions, on the other hand, also prevents that positive/negative electrode materials are different, but the conducting base block 7 compounding of similar size for it is more convenient during the assembly, the operator need not spend attention, also need experience and professional knowledge can accomplish correct assembly operation directly without mistake.

The following describes the implementation principle of the battery cover plate assembly of the present embodiment: the battery post is connected with the cover plate 5 completely through the connecting column 3, namely the connecting column 3 is connected with the cover plate 5 through the first mounting hole 51, the sealing element 6 and the external insulation plastic 52 are both acted on the connecting column 3, the internal insulation plastic 53 is acted on the conductive base block 7 connected with the connecting column 3, so that the battery post is fixedly installed on the cover plate 5, the sealing element is completely acted on the single stress body of the connecting column 3, no part of the stress body is acted on the substrate 1, no part of the stress body is acted on the connecting column 3, no stress is acted between the bonding surfaces of the substrate 1 and the connecting column 3, the condition that the bonding surfaces of the substrate 1 and the connecting column 3 are disconnected is structurally avoided, meanwhile, the area of a copper/aluminum bonding surface is also increased, the structural strength of the battery terminal is improved, the overcurrent capacity and the service life of the battery terminal are improved, the assembling is convenient and rapid, and the connection is reliable. Compare in the condition of original spliced pole 3 at the outside battery as battery utmost point post terminal, the utility model provides a base plate 1 has increased compound utmost point post's surface area's utilization ratio, and copper aluminium faying face area increases by a wide margin, and the ability of overflowing of copper product is greater than the aluminum product again to under the condition that does not change compound utmost point post size, effectively improved compound utmost point post ability of overflowing, effectual reduction cost of manufacture improves the productivity in the unit interval, has saved the space of battery package.

Example two:

as shown in fig. 7, the difference with the first embodiment lies in that, when manufacturing the battery post, the copper-aluminum composite board is in hot rolling, the through groove 21 is opened on the surface of the aluminum plate 2, the width of the through groove 21 is equal to the width of the copper plate 4, but the depth of the through groove 21 is smaller than the thickness of the copper plate 4, so that after the copper plate 4 is placed in the through groove 21, the surface of the copper plate 4 protrudes out of the surface of the aluminum plate 2, and then the copper plate 4 and the aluminum plate 2 are subjected to hot rolling treatment, although some hot-pressing difficulties are increased, but only a few parts of the copper plate 4 are embedded into the aluminum plate 2, further reducing the consumptive materials of copper and aluminum, further improving the utilization rate of materials, and the producer can select the depth of the through groove 21 according to specific use conditions.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A battery post, comprising:

the battery comprises a base plate (1), wherein the base plate (1) is made of an aluminum plate (2), and the base plate (1) is arranged outside the battery and is used for being connected with a circuit outside the battery;

spliced pole (3), spliced pole (3) adopt copper (4) to make, spliced pole (3) one end with base plate (1) fixed connection, the other end be used for with battery inside electric core is connected.

2. The battery post according to claim 1, characterized in that the base plate (1) and the connection post (3) are made of copper-aluminum composite plates.

3. The battery post according to claim 2, characterized in that the aluminum plate (2) and the copper plate (4) are joined into the copper-aluminum composite plate by hot rolling.

4. The battery post according to claim 3, wherein the aluminum plate (2) is provided with a through groove (21) on the surface thereof, the width of the through groove (21) is equal to the width of the copper plate (4), and the copper plate (4) is placed in the through groove (21) during hot rolling.

5. The battery post according to claim 4, characterized in that the depth of the through slot (21) is equal to the copper plate (4) thickness.

6. The battery post according to claim 4, characterized in that the depth of the through-slots (21) is less than the copper plate (4) thickness.

7. A battery cover plate component is characterized by comprising the battery pole column according to any one of claims 1 to 6 and further comprising a cover plate (5), wherein a first mounting hole (51) is formed in the cover plate (5), the cover plate (5) is sleeved on the connecting column (3) through the first mounting hole (51), a sealing element (6) is arranged between the connecting column (3) and the cover plate (5), an external insulation plastic (52) is arranged between the connecting column (3) and the cover plate (5), the end of the connecting column (3) far away from the substrate (1) is connected with a conductive base block (7), and an internal insulation plastic (53) is arranged between the conductive base block (7) and the cover plate (5).

8. The battery cover plate assembly according to claim 7, wherein the connection post (3) comprises a first cylinder (31) and a second cylinder (32) extending towards the inside of the battery, the first cylinder (31) being adapted to be connected with the first mounting hole (51), the conductive base block (7) being provided with a second mounting hole (71), the second cylinder (32) being adapted to be connected with the second mounting hole (71).

9. The battery cover plate assembly according to claim 8, wherein the surface of the sealing member (6) adjacent to the base plate (1) is provided with a sealing ring (61), the sealing ring (61) being inserted between the first mounting hole (51) and the first cylinder (31).

10. The battery cover plate assembly according to claim 8, wherein the surface of the conductive base block (7) far away from the cover plate (5) is provided with a yielding groove (72), the end of the second column body (32) is arranged in the yielding groove (72), the conductive base block (7) is provided with an unfilled corner (73), and the inner insulating plastic (53) comprises a guiding edge (531) matched with the unfilled corner (73).

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