CN218867333U - Bridging busbar, trapezoidal electric core component and electric equipment - Google Patents

Abstract

The utility model relates to the technical field of batteries, concretely relates to cross-over connection busbar and trapezoidal electric core subassembly and consumer. The cross-over bus includes: the first connecting part is connected with the negative pole column of the first battery cell; the second connecting part is connected with the positive pole of the second battery cell; the first battery cell and the second battery cell are stacked along the thickness direction, and the projection of the negative pole column of the first battery cell and the projection of the positive pole column of the second battery cell along the thickness direction are at least partially overlapped; an intermediate connecting portion connected between the first connecting portion and the second connecting portion; the first end of the middle connecting part is connected with the first end of the first connecting part along the length direction, and the second end of the middle connecting part is connected with the second end of the second connecting part along the length direction. The utility model provides a cross-over connection busbar is through with first connecting portion, intermediate junction portion and second connecting portion integrated into one piece to make cross-over connection busbar as a whole, need not to carry out the split, with reduction spare part quantity, reduce material management cost.

Description

Bridging busbar, trapezoidal electric core component and electric equipment

Technical Field

The utility model relates to the technical field of batteries, concretely relates to cross-over connection busbar and trapezoidal electric core subassembly and consumer.

Background

In the prior art, the battery cell module generally includes a plurality of battery cells, and the battery cells are connected to each other through a bus bar. The bus bar is one of important parts in a power battery system and is a basic conductor connected in series and parallel between battery cells. However, when electric core adopted the range upon range of setting up the form, often need the cross-over connection busbar to realize connecting, traditional cross-over connection busbar adopts two segmentation tailor-welded designs more, need earlier with two independent electrically conductive piece respectively with two electric core utmost point posts welding together, weld connection is carried out once more with the overlap joint position that two sections electrically conductive pieces, spare part is in large quantity, leads to a cross-over connection busbar to need welding 3 times altogether, and production efficiency is low, and technology cost is high.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art split type cross-over connection busbar spare part quantity and leading to needing welded defect many times to a cross-over connection busbar and trapezoidal electric core subassembly and consumer that can reduce the welding number of times are provided.

In order to solve the above technical problem, the utility model provides a pair of cross-over connection busbar, include:

the first connecting part is suitable for being connected with the negative pole column of the first battery cell;

the second connecting part is suitable for being connected with a positive pole of a second battery cell;

the first battery cell and the second battery cell are arranged in a stacked mode along the thickness direction, and the projection of the negative pole of the first battery cell and the projection of the positive pole of the second battery cell along the thickness direction are at least partially overlapped;

an intermediate connection portion connected between the first connection portion and the second connection portion; the first end of the middle connecting part is suitable for being connected with the first end of the first connecting part along the length direction, and the second end of the middle connecting part is suitable for being connected with the second end of the second connecting part along the length direction.

Optionally, the first connecting portion, the middle connecting portion and the second connecting portion are integrally formed.

Optionally, a safety unit is further disposed on the intermediate connection portion, and a melting point of the safety unit is lower than melting points of the first connection portion and the second connection portion.

Optionally, the first connection portion is welded to the negative pole, and the second connection portion is welded to the positive pole.

The utility model provides a trapezoidal electric core subassembly, include:

the battery comprises a plurality of trapezoidal battery cells which are stacked in the thickness direction;

and the bridging busbar is suitable for connecting two adjacent trapezoidal battery cores.

Optionally, the trapezoidal battery cell has a first end face and a second end face along the thickness direction, and an inclined plane connecting the first end face and the second end face in an inclined state, where a size of the second end face is greater than a size of the first end face;

an included angle area is formed between the inclined plane of one of the two adjacent trapezoidal battery cells and the second end face of the other trapezoidal battery cell;

the intermediate connection of the jumper bar is arranged in the corner region.

Optionally, the safety unit is arranged in the included angle region.

Optionally, the intermediate connecting portion is parallel to the inclined surface.

Optionally, the cross-over bus bar is configured in a zigzag or S shape; the shape of the bridging busbar is matched with the shape of the outer edge of the trapezoidal battery cell in the length direction.

The utility model provides an electric equipment, include: the power consumption equipment body, and set up in on the power consumption equipment body and for the power consumption equipment body carries out the power supply as above trapezoidal electric core subassembly.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a cross-over connection busbar, through inciting somebody to action first connecting portion intermediate junction portion reach second connecting portion integrated into one piece to make cross-over connection busbar as a whole, need not to carry out the split, with reduction spare part quantity, reduce material management cost.

2. The utility model provides a cross-over connection busbar, through with the first end of intermediate junction portion be suitable for with first connecting portion are connected along length direction's first end, the second end of intermediate junction portion be suitable for with the second connecting portion are connected along length direction's second end to make intermediate junction portion be the tilt state, and preferably parallel with the inclined plane on inclined plane, so that utilize the contained angle region, avoid the space extravagant, and can rationally arrange the cross-over connection busbar, need not to reserve solitary installation space for the busbar.

3. When a plurality of trapezoidal battery cells are stacked along the thickness direction, an included angle area can be formed between the inclined plane of one of the two adjacent trapezoidal battery cells and the second end face of the other trapezoidal battery cell; the bridging confluence arrangement is arranged in the included angle area, so that the included angle area formed by the upper layer electric core and the lower layer electric core can be fully utilized for connection arrangement; no additional space is occupied, and the space utilization rate is improved; can guarantee trapezoidal electric core along thickness direction's space utilization, need not to set up extra overall arrangement space for the cross-over connection busbar, improve energy density.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a trapezoidal cell of the present invention;

fig. 2 is a front view of a trapezoidal cell of the present invention;

FIG. 3 is a schematic perspective view of the trapezoidal electrical core assembly of the present invention;

FIG. 4 is a first enlarged view of a portion of FIG. 3;

FIG. 5 is a second enlarged view of the portion of FIG. 3;

fig. 6 is a front view of the trapezoidal core assembly of the present invention.

Description of the reference numerals:

1-a trapezoidal battery cell, 11-a first end face, 12-a second end face, 13-a slope, 14-a negative pole column, 15-a positive pole column and 16-an explosion-proof valve;

3-jumper bus, 31-first connection, 32-intermediate connection, 33-second connection, 34-safety unit.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1 to 6, the jumper bus provided in this embodiment includes:

a first connection portion 31 adapted to be connected to the negative electrode tab 14 of the first cell;

a second connection portion 33 adapted to be connected to the positive post 15 of the second cell;

the first battery cell and the second battery cell are stacked in the thickness direction, and projections of the negative pole 14 of the first battery cell and the positive pole 15 of the second battery cell in the thickness direction are at least partially overlapped;

an intermediate connection portion 32 connected between the first connection portion 31 and the second connection portion 33; a first end of the intermediate connecting portion 32 is adapted to be connected to a first end of the first connecting portion 31 in the length direction, and a second end of the intermediate connecting portion 32 is adapted to be connected to a second end of the second connecting portion 33 in the length direction.

Alternatively, the bridging bus bar may be made of a metal material, such as aluminum or aluminum alloy or copper.

The jumper bar can be formed by bending a metal plate, and the bending shape of the jumper bar is adapted to the shape of the outer surface of the battery cell at the installation position of the jumper bar.

Hereinafter, the structural form of the trapezoidal cell 1 adopted in the present embodiment will be described first.

The cross section of the trapezoidal battery cell 1 perpendicular to the width direction is trapezoidal, the trapezoidal battery cell 1 has a first end face 11 and a second end face 12 along the thickness direction, and is connected in an inclined state with the inclined plane 13 of the first end face 11 and the second end face 12, and the size of the second end face 12 is larger than that of the first end face 11.

A pole is formed on the second end surface 12 of the trapezoidal battery cell 1 in a protruding manner; the pole comprises a negative pole 14 and a positive pole 15; along the length direction, the negative pole posts 14 and the positive pole posts 15 are respectively arranged at two ends of the second end face 12.

When a plurality of trapezoidal electric core 1 is when range upon range of setting along thickness direction, one second terminal surface 12 and another of trapezoidal electric core 1 first terminal surface 11 looks butt, because negative pole post 14 with positive post 15 set up respectively in second terminal surface 12 is along length direction's both ends for negative pole post 14 and positive post 15 can give way for first terminal surface 11 formation, make things convenient for the laminating of second terminal surface 12 and first terminal surface 11. An included angle region is formed between the inclined plane 13 of one of the two adjacent trapezoidal battery cells 1 and the second end face 12 of the other one, and the negative pole 14 and the positive pole 15 are both located in the included angle regions on the two sides.

Because the first battery cell and the second battery cell are stacked in the thickness direction, and at least part of the projections of the negative pole 14 of the first battery cell and the positive pole 15 of the second battery cell in the thickness direction overlap, as shown in fig. 6, at this time, if an included angle region is formed between two adjacent trapezoidal battery cells 1, space is wasted, in this embodiment, the first end of the intermediate connection portion 32 is suitable for being connected with the first end of the first connection portion 31 in the length direction, and the second end of the intermediate connection portion 32 is suitable for being connected with the second end of the second connection portion 33 in the length direction, so that the intermediate connection portion 32 is in an inclined state and is preferably parallel to the inclined plane of the inclined plane 13, so that the included angle region is utilized, space waste is avoided, a cross-over busbar can be reasonably arranged, and no separate installation space needs to be reserved for the busbar.

Specifically, the first connection portion 31, the intermediate connection portion 32, and the second connection portion 33 are integrally formed.

The bridging busbar provided by the embodiment is integrally formed by the first connecting part 31, the intermediate connecting part 32 and the second connecting part 33, so that the bridging busbar is taken as a whole without being disassembled, the number of parts is reduced, and the material management cost is reduced.

Specifically, a safety unit 34 is further disposed on the intermediate connection portion 32, and a melting point of the safety unit 34 is lower than melting points of the first connection portion 31 and the second connection portion 33.

The cross-over busbar that this embodiment provided still is provided with insurance unit 34 on intermediate junction portion 32, insurance unit 34's melting point is less than first connecting portion 31 with the melting point of second connecting portion 33 to can break off the circuit when taking place short circuit or thermal runaway, avoid producing and draw the arc, reduce the box and puncture or further aggravate short circuit or thermal runaway's risk, realize function integration, make the security improve.

The safety unit 34 may be a thermal fuse, and the working principle thereof is as follows: the hot melting fuse is made of fusible alloy with the melting point lower than 230 degrees, and generally consists of environment-friendly low-melting-point metal elements such as In, sn, bi and the like. The fusible alloy wrapped with the fusing assistant agent on the outer layer is used as an electrical connection point, and when the temperature reaches the melting point of the fusible alloy, the fusing assistant agent is combined to act together, so that the fuse unit 34 can be fused quickly to cut off a circuit. Under the condition of overcurrent or short circuit, the cross-over bus continuously heats, so that the fusible alloy connected with the cross-over bus reaches a melting point, a high-voltage circuit can be cut off, and the fusible alloy melt is combined with cladding of the fusing assistant agent, so that the maximum 200V high voltage can be cut off.

Optionally, in this embodiment, the safety unit 34 may be flexibly selected according to the requirements of a specific use environment, so that the jumper bus is divided into two types, namely, a safety type and a safety-free type, and the two structural types can be used in common in the pressing tool.

Specifically, the first connection portion 31 is welded to the negative electrode tab 14, and the second connection portion 33 is welded to the positive electrode tab 15.

Optionally, after the cross-over busbar is attached to the cell pole through the tool, the cross-over busbar is welded by using an inclined laser beam, and only the first connection portion 31 needs to be connected with the negative pole 14 of the first cell, and the second connection portion 33 needs to be connected with the positive pole 15 of the second cell, so that a laser welding process can be reduced technically; the process cost is reduced.

Example two

As shown in fig. 1, the present embodiment provides a trapezoidal electrical core assembly, including:

a plurality of trapezoidal battery cells 1 which are stacked in the thickness direction;

and a jumper bar 3 as described in the first embodiment above and adapted to connect two adjacent trapezoidal battery cells 1.

It should be noted that, when the cover plate of the traditional square-shell battery cell is welded, the tab needs to be bent, the bent tab state cannot be observed, and the tab bent state has poor consistency, which may cause product quality fluctuation. The trapezoidal electric core that this embodiment adopted through the shape that changes electric core, can avoid electric core inside utmost point ear to appear bending, guarantees utmost point ear state uniformity.

Optionally, a pole is formed on the second end surface 12 of the trapezoidal battery cell 1 in a protruding manner, and an explosion-proof valve 16 is arranged on the inclined surface 13. The explosion-proof valve 16 and the pole are respectively arranged on different planes, and can be independent from each other by adopting a separated and staggered arrangement form, so that the mutual interference of the explosion-proof valve 16 and the pole is avoided.

Specifically, the trapezoidal battery cell 1 has a first end face 11 and a second end face 12 along the thickness direction, and an inclined plane 13 connecting the first end face 11 and the second end face 12 in an inclined state, where the size of the second end face 12 is greater than the size of the first end face 11;

an included angle area is formed between the inclined plane 13 of one of the two adjacent trapezoidal battery cells 1 and the second end face 12 of the other one;

the intermediate connection 32 of the jumper bar 3 is arranged in the corner region.

In the trapezoidal battery core assembly provided in this embodiment, when the plurality of trapezoidal battery cells 1 are stacked in the thickness direction, an included angle region may be formed between the inclined surface 13 of one of the two adjacent trapezoidal battery cells 1 and the second end surface 12 of the other one; the bridging busbar 3 is arranged in the included angle area, so that the included angle area formed by the upper layer of battery cell and the lower layer of battery cell can be fully utilized for connection arrangement; no additional space is occupied, and the space utilization rate is improved; can guarantee trapezoidal electric core 1 along the space utilization of thickness direction, need not to set up extra overall arrangement space for cross-over connection busbar 3, improve energy density.

In particular, the securing unit 34 is arranged in the region of the pinch angle.

Since the safety unit 34 is formed by protruding from the middle connection portion 32, if the safety unit 34 is disposed at another position, an installation space needs to be reserved for the safety unit 34, and the trapezoidal core assembly provided in this embodiment does not occupy another space by disposing the safety unit 34 in the included angle region, thereby improving the space utilization rate; the space utilization rate of trapezoidal electric core 1 along the thickness direction can be guaranteed, extra layout space does not need to be set for insurance unit 34, and the improvement of energy density is facilitated.

It should be noted that, while the included angle area is fully utilized by the safety unit 34, the protruding melt portion on the safety unit 34 cannot block the welding path of the laser welding device, so as to ensure that the second connection portion 33 can be conveniently connected with the positive post 15 of the second electrical core.

Specifically, the intermediate connecting portion 32 is parallel to the inclined surface 13. So that more space for the angle area can be reserved for arranging other structures.

Specifically, the cross-over bus bar 3 is configured in a zigzag or S shape; the shape of the cross-over bus bar 3 is matched with the shape of the outer edge of the trapezoidal electric core 1 along the length direction. So as to facilitate positioning and installation and avoid extra space occupation.

EXAMPLE III

The present embodiment provides an electric device, including: the consumer body, and set up in on the consumer body and for the consumer body carries out the power supply as described above trapezoidal electric core subassembly.

In this embodiment, the electric device may be an electric automobile, an electric motorcycle, a ship, an aircraft, a computer device, a loading machine, or the like.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (10)

1. A cross-over strap, comprising:

a first connection portion (31) adapted to be connected to a negative electrode tab (14) of a first cell;

a second connection portion (33) adapted to be connected with a positive post (15) of a second cell;

the first battery cell and the second battery cell are stacked in the thickness direction, and the projections of the negative pole (14) of the first battery cell and the positive pole (15) of the second battery cell in the thickness direction are at least partially overlapped;

an intermediate connection portion (32) connected between the first connection portion (31) and the second connection portion (33); the first end of the intermediate connecting part (32) is suitable for being connected with the first end of the first connecting part (31) along the length direction, and the second end of the intermediate connecting part (32) is suitable for being connected with the second end of the second connecting part (33) along the length direction.

2. Bridging busbar according to claim 1, characterized in that the first connection part (31), the intermediate connection part (32) and the second connection part (33) are integrally formed.

3. Bridging busbar according to claim 2, characterized in that a fuse unit (34) is further arranged on the intermediate connection (32), the fuse unit (34) having a lower melting point than the first connection (31) and the second connection (33).

4. The jumper bar according to claim 1, wherein the first connection portion (31) is welded to the negative post (14) and the second connection portion (33) is welded to the positive post (15).

5. A trapezoidal core assembly, comprising:

a plurality of trapezoidal battery cores (1) which are stacked along the thickness direction;

and a jumper bar (3) according to any of claims 1-4 adapted to connect two adjacent trapezoidal cells (1).

6. The trapezoidal core assembly according to claim 5, wherein said trapezoidal cells (1) have a first end face (11) and a second end face (12) along the thickness direction, and a slope (13) connecting said first end face (11) and said second end face (12) in an inclined state, the size of said second end face (12) being larger than the size of said first end face (11);

an included angle area is formed between the inclined plane (13) of one of the two adjacent trapezoidal battery cells (1) and the second end face (12) of the other trapezoidal battery cell;

the intermediate connection (32) of the jumper bar (3) is arranged in the corner region.

7. The trapezoidal core assembly according to claim 6, characterized in that a fuse unit (34) is arranged in said included angle region.

8. Trapezoidal electrical core assembly according to claim 6, characterized in that said intermediate connection (32) is parallel to said inclined plane (13).

9. The trapezoidal electrical core assembly according to any one of claims 6 to 8, characterized in that the jumper bus bars (3) are configured in a zigzag or S-shape; the shape of the bridging busbar (3) is matched with the shape of the outer edge of the trapezoidal battery core (1) along the length direction.

10. An electrical device, comprising:

the electrical equipment comprises an electrical equipment body and the trapezoidal core assembly which is arranged on the electrical equipment body and used for supplying power to the electrical equipment body, wherein the trapezoidal core assembly is as claimed in any one of claims 5 to 9.

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