CN220628132U - Connecting piece and battery pack - Google Patents

Abstract

The application relates to a connecting piece and a battery pack. The connecting piece is used for connecting a plurality of batteries and comprises at least two connecting units and at least one connecting section, each connecting unit comprises a first connecting part, a second connecting part and a conducting part, the first connecting part is used for connecting the anode of one battery, the second connecting part is used for connecting the cathode of the other battery, the conducting parts are connected with the first connecting part and the second connecting part, and any two adjacent conducting parts are connected through the connecting sections so as to connect the two connecting units; the thickness of the first connecting portion and the second connecting portion is smaller than that of the conductive portion. This application connecting piece is through setting up first connecting portion and the second connecting portion that thickness is less than conductive part thickness to first connecting portion and second connecting portion respectively with the anodal and the negative pole welding of corresponding battery, thereby improve the connection stability of this application connecting piece.

Description

Connecting piece and battery pack

Technical Field

The present disclosure relates to the field of batteries, and more particularly, to a connector and a battery pack including the same.

Background

In the field of batteries, a battery pack typically includes a battery tray and a plurality of batteries. The plurality of batteries are fixed in the battery tray side by side. In order to ensure the electrical connection of the plurality of batteries, a connecting piece is generally required to be welded with the positive electrode and the negative electrode of the adjacent batteries, so that the plurality of batteries can be matched with each other to release electric energy outwards.

However, in the related art, with the improvement of the performance requirement (for example, the quick-charging performance, etc.) of the battery pack, the current connecting piece is welded with the positive electrode and the negative electrode of the battery, so that the problem of poor welding quality between the connecting piece and the positive electrode and the negative electrode of the battery exists, thereby affecting the connection stability of the connecting piece, further easily causing the falling-off of the connecting piece and causing the safety risk of the battery pack.

Disclosure of Invention

In view of the above-described shortcomings of the prior art, an object of the present application is to provide a connection member that improves connection stability, and a battery pack including the same. The method specifically comprises the following technical scheme:

in a first aspect, an embodiment of the present application provides a connecting piece, including at least two connecting units and at least one connecting section, where each connecting unit includes a first connecting portion, a second connecting portion and a conductive portion, the first connecting portion is used for connecting an anode of one battery, the second connecting portion is used for connecting a cathode of another battery, the conductive portion is connected to the first connecting portion and the second connecting portion, and any two adjacent conductive portions are connected by the connecting section to connect two connecting units;

the thickness of the first connecting portion and the second connecting portion is smaller than that of the conductive portion.

The connecting piece is characterized in that the first connecting part is connected with the positive electrode of one battery, the second connecting part is connected with the negative electrode of the other battery, and the conductive part is connected between the first connecting part and the second connecting part to limit the relative position between the first connecting part and the second connecting part, so that the battery connected with the first connecting part and the battery connected with the second connecting part are limited.

The connecting piece is connected between any two adjacent conductive parts through the connecting section so as to limit the relative positions of two connecting units connected with the connecting section. The cooperation conductive part realizes the restriction to the relative position of the battery that this application connecting piece is connected to guarantee the position accuracy of the battery that this application connecting piece is connected.

This application connecting piece is still through setting up first connecting portion and the second connecting portion that thickness is less than conductive part thickness to when realizing first connecting portion and the anodal welding of battery, and the negative pole welded of second connecting portion and battery, improve the welding effect of first connecting portion and second connecting portion and corresponding battery, thereby improve the connection stability of this application connecting piece.

In one embodiment, the first and second connection portions each have a thickness between 0.2mm and 0.5 mm.

In this embodiment, through setting up the thickness of first connecting portion and second connecting portion between 0.2mm-0.5mm to avoid leading to the influence of welding process to the battery because of the thickness is too little, also avoided influencing the welding effect of first connecting portion and second connecting portion and corresponding battery because of the thickness is too thick, thereby guaranteed the welding quality of first connecting portion and second connecting portion and corresponding battery, and then guaranteed the connection effect of connecting piece of this application.

In one embodiment, the connecting section has a cross-sectional width in a direction perpendicular to the extension of the connecting section of between 8mm and 20 mm.

In this embodiment, since the current transmitted between the two connection units connected by the connection section is smaller than that of the conductive portion, by setting the cross-sectional width of the connection section between 8mm and 20mm, so that the current passing capability of the connection section under the cross-sectional width can bear the current transmitted between the two connected connection units, the connection section can also dissipate heat generated by the two connected conductive portions due to a temperature difference formed by a current difference between the connection section and the conductive portion.

In one embodiment, the width of the cross section of the conductive portion is between 20mm and 40mm in a direction perpendicular to the extension of the conductive portion.

In this embodiment, the cross-sectional width of the conductive portion is set between 20mm and 40mm, so that the current passing capability of the conductive portion under the cross-sectional width can bear the current transmitted between the connected first connection portion and second connection portion, and meanwhile, the surface area of the conductive portion can also enable the heat dissipation capability of the conductive portion to be matched with the heat generated by matching of the current and the conductive portion.

In one embodiment, the connector further comprises a flow passage hole provided in the connection section and/or the conductive portion and penetrating the connector.

In this embodiment, the connecting section and/or the conductive portion is provided with the flow passage hole capable of penetrating through the connecting piece, so that when the structure of the connecting section and/or the conductive portion interferes with the inlet of the foaming glue poured into the battery from the outside, the foaming glue can be poured into the space between the batteries through the flow passage hole.

In one embodiment, the connecting piece further comprises a runner hole, and the runner hole is further arranged at the connection part of the connecting section and the conductive part.

In this embodiment, the connection part of the connection section and the conductive part is provided with the runner hole, so that the foaming glue can be poured between the batteries through the runner hole.

In one embodiment, the connecting piece further comprises a positioning hole, and the positioning hole is arranged on the second connecting portion and/or the first connecting portion and penetrates through the connecting piece.

In this embodiment, the positioning hole is provided on the second connection portion and/or the first connection portion, and penetrates the connection member, so that the positioning hole can determine the relative position of the second connection portion and the corresponding electrode of the battery through alignment with the corresponding electrode of the battery.

In one embodiment, the first connecting portion and the second connecting portion have a height difference along the thickness direction of the connecting member, so that the positive electrode and the negative electrode of the battery can be electrically connected with the two connecting members, respectively.

In this embodiment, the positive electrode and the negative electrode of the battery have a height difference, and the first connection portion and the second connection portion having the height difference are provided, so that the first connection portion and the second connection portion can be matched with the positive electrode and the negative electrode of the battery, and the positive electrode and the negative electrode of the battery can be electrically connected with the two connection pieces respectively.

In one embodiment, the first connection portions of the two connection units connected to the connection section are located on the same side of the connection section along the extension direction of the connection section.

In this embodiment, the first connecting portions of the two connecting units connected with the connecting section are located on the same side of the connecting section in the extending direction of the connecting section, so that the connecting piece is manufactured.

In one embodiment, the conductive portion has a thickness between 0.3mm and 1 mm.

In this embodiment, the thickness of the conductive portion is set between 0.3mm and 1mm, so that the conductive portion can bear the current transmitted between the connected first connection portion and second connection portion and has better heat dissipation capability.

In a second aspect, embodiments of the present application provide a battery pack, including a battery tray, a plurality of batteries and connecting piece, a plurality of batteries arrange in proper order and set up in the battery tray, and the connecting piece is connected between adjacent batteries.

In one embodiment, the positive electrode of the battery surrounds the periphery of the negative electrode, the shape of the first connecting part is arc-shaped, and the radius of the arc-shaped outer ring of the first connecting part is smaller than that of the outer ring of the positive electrode of the battery; or, the negative electrode of the battery surrounds the periphery of the positive electrode, the shape of the second connecting part is arc-shaped, and the radius of the arc-shaped outer ring of the second connecting part is smaller than that of the outer ring of the negative electrode of the battery.

In this embodiment, when the positive electrode of the battery surrounds the periphery of the negative electrode, the shape of the first connection portion is set to be arc-shaped, and the radius of the arc-shaped outer ring of the first connection portion is smaller than that of the outer ring of the positive electrode of the battery, so that the welding area of the first connection portion and the positive electrode of the battery is increased, and the welding effect of the first connection portion and the positive electrode of the battery is ensured. On the other hand, when the negative electrode of the battery surrounds the periphery of the negative electrode, the shape of the second connecting part is set to be arc-shaped, and the arc-shaped outer ring radius of the second connecting part is smaller than the outer ring radius of the negative electrode of the battery, so that the welding area of the second connecting part and the negative electrode of the battery is increased, and the welding effect of the second connecting part and the negative electrode of the battery is ensured.

In one embodiment, the connecting member has a flow passage hole, the plurality of cells are arranged in sequence with a gap between at least two cells, and a projection of the flow passage hole in a height direction of the battery pack is located in the gap.

In this embodiment, by setting the projection of the flow passage hole in the gap between at least two batteries, it is ensured that the foaming glue entering from the flow passage hole can be filled between the batteries.

In one embodiment, the cells are cylindrical cells, the three cylindrical cells are adjacent to each other and form three vertexes of a triangle along the center of the surface of the same side in the height direction of the cell pack, a gap is formed between the three cylindrical cells, and the center of the flow passage hole is opposite to the center of the gap in the height direction of the cell pack.

In the embodiment, the center of the flow passage hole and the center of the gaps among the three cylindrical batteries with triangular centers are arranged oppositely, so that the foaming glue entering from the flow passage hole can be filled among the three cylindrical batteries.

It can be appreciated that, due to the battery pack provided in the second aspect of the present application, the connecting member provided in the first aspect of the present application is adopted, which also has the beneficial effect of improving the connection stability.

Drawings

Fig. 1 is a schematic structural view of a battery pack according to an embodiment of the present application;

FIG. 2 is a schematic view of a battery according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a partial structure of a battery pack according to an embodiment of the present application;

FIG. 4 is a top view of a battery pack provided in one embodiment of the present application;

FIG. 5 is a schematic structural view of a connector according to an embodiment of the present disclosure;

fig. 6 is a top view of a connector provided in one embodiment of the present application.

Detailed Description

In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments that can be used to practice the present application. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms referred to in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are merely directions referring to the attached drawings, and thus, directional terms are used for better, more clear description and understanding of the present application, rather than indicating or implying that the apparatus or element being 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 application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be connected inside two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context. It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprises," "comprising," "includes," "including," "may be" or "including" as used in this application mean the presence of the corresponding function, operation, element, etc. disclosed, but not limited to other one or more additional functions, operations, elements, etc. Furthermore, the terms "comprises" or "comprising" mean that there is a corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, and that there is no intention to exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Referring to fig. 1, a schematic structure of a battery pack 300 according to an embodiment of the present application is shown.

As shown in fig. 1, a battery pack 300 provided in the present application includes a battery tray 301, a battery 200, and a connector 100. The number of the batteries 200 is a plurality of, a plurality of the batteries 200 are sequentially arranged, specifically, a plurality of the batteries 200 are arranged side by side along the second direction to form a battery row, a plurality of the battery rows are arranged at intervals along the first direction to form a battery pack, and the battery pack is arranged in the battery tray 301, so that the battery tray 301 can be used for realizing protection of the battery pack. As shown in fig. 1, the plurality of batteries 200 are arranged along a first direction 001 and a second direction 002, the first direction 001 and the second direction 002 are perpendicular to each other, the height direction of the battery pack 300 is a third direction 003, and the third direction 003 is perpendicular to the first direction 001 and the second direction 002, respectively. Generally, the first direction 001 may be a length direction of the battery pack 300, and the second direction 002 is a width direction of the battery pack 300. Alternatively, the first direction 001 may be a width direction of the battery pack 300, and the second direction 002 is a length direction of the battery pack 300.

In the second direction 002, the connection member 100 is connected between adjacent cells 200 so that the adjacent cells 200 can be connected in parallel or in series with each other. The voltage of the battery pack 300 can be increased due to the batteries 200 connected in series with each other, and the capacity of the battery pack 300 can be increased due to the batteries 200 connected in parallel with each other. It will be appreciated that the arrangement of the connector 100 enables the batteries 200 disposed in the battery tray 301 to be matched with each other to form a battery pack 300 having a certain voltage and a certain capacity to accommodate different requirements of the battery pack 300 of the present application.

In one embodiment, as shown in fig. 1, the battery pack 300 further includes a temperature sensor 302. The temperature sensor 302 is disposed between two adjacent connectors 100 and is attached to the surface of the battery 200 between two adjacent connectors 100. The temperature sensor 302 can collect the temperature of the adjacent battery 200 and transmit the temperature information outwards, so that the temperature collection of the battery 200 in the battery pack 300 is realized.

Please refer to fig. 2, which is a schematic diagram illustrating a structure of a battery 200 according to an embodiment of the present application.

As shown in fig. 2, the battery 200 includes a positive electrode 201 and a negative electrode 202, wherein the positive electrode 201 is disposed at an edge region of an end face of the battery 200, and the negative electrode 202 is disposed at a center region of the end face of the battery 200. That is, the positive electrode 201 surrounds the periphery of the negative electrode 202. It will be appreciated that in another embodiment, the negative electrode 202 of the battery 200 may be disposed around the positive electrode 201.

Please refer to fig. 3 for a schematic diagram of a partial structure of the battery pack 300 provided in an embodiment of the present application, and fig. 4 for a top view of the battery pack 300 provided in an embodiment of the present application. Here, for convenience in describing the connection relationship of the battery 200 and the connector 100, the battery tray 301 is omitted in fig. 3 and 4.

As shown in fig. 3 and 4, the connector 100 provided in the present application includes a connection unit 10 and a connection section 20. The number of the connection units 10 is plural to electrically connect the positive electrodes 201 and the negative electrodes 202 of the adjacent two batteries 200.

Each of the connection units 10 includes a first connection portion 11, a second connection portion 12, and a conductive portion 13. Wherein the first connection part 11 is connected with the positive electrode 201 of one battery 200, the second connection part 12 is connected with the negative electrode 202 of one battery 200, and the conductive part 13 is arranged between the first connection part 11 and the second connection part 12, so that the current led out from the positive electrode 201 of the battery 200 can be transmitted into the conductive part 13 through the first connection part 11 and transmitted from the conductive part 13 to the negative electrode 202 of the other battery 200, thereby realizing the series connection between the battery 200 connected by the first connection part 11 and the battery 200 connected by the second connection part 12.

Meanwhile, the conductive portion 13 also serves to control the interval between the first connection portion 11 and the second connection portion 12. The conductive portion 13 may be a rigid material, and the conductive portion 13 is connected between the first connection portion 11 and the second connection portion 12. It will be appreciated that the conductive portion 13 can define the relative positions of the first and second connection portions 11 and 12, thereby defining the relative positions of the battery 200 connected to the first connection portion 11 and the battery 200 connected to the second connection portion 12. Thereby ensuring the positional accuracy of the battery 200 to which the connection unit 10 is connected.

As shown in fig. 4, the connection section 20 is provided between any adjacent two of the connection units 10 and is connected to the two conductive portions 13 of the two connection units 10. It will be appreciated that the arrangement of the connection segments 20 may enable a parallel connection between the batteries 200 connected by the two first connection parts 11 or the second connection parts 12 of two adjacent connection units 10.

At the same time, the connection section 20 also serves to control the spacing between the two connected connection units 10. Is connected between two adjacent conductive parts 13 based on the connection section 20. It will be appreciated that the connection section 20 can define the relative positions of the two connected connection units 10, and thus the relative positions of the batteries 200 connected to the two connection units 10. Thereby ensuring the positional accuracy of the battery 200 to which the connector 100 of the present application is connected.

Therefore, the mutual cooperation of the conductive part 13 and the connection section 20 can define the relative position of the battery 200 to which the connection member 100 is connected, thereby ensuring the positional accuracy of the battery 200 to which the connection member 100 is connected.

Referring to fig. 5, a schematic structural diagram of a connector 100 according to an embodiment of the present application is shown.

As shown in fig. 5, the first connection portion 11 has a first thickness H1, the second connection portion 12 has a second thickness H2, and the conductive portion 13 has a third thickness H3. Wherein, the first thickness H1 and the second thickness H2 are smaller than the third thickness H3.

In the related art, when the current transmission capability between two batteries becomes large, in order to secure the conductive function of the connection member, it is necessary to increase the entire thickness of the connection member to increase the overcurrent capability of the connection member. Correspondingly, the thickness of the two connecting parts connected with the positive electrode and the negative electrode of the battery is also increased, so that the welding strength of the connecting parts and the corresponding battery is affected, the connecting effect of the connecting piece in the related art is relatively poor, and the connecting stability is relatively poor.

Therefore, the connector 100 of the present application can ensure the welding effect of the first and second connection parts 11 and 12 and the corresponding battery 200 while facilitating the welding of the first and second connection parts 11 and 12 and the corresponding battery 200 by setting the thicknesses of the first and second connection parts 11 and 12 to be smaller than the thickness of the conductive part 13. Thereby improving the connection stability of the connector 100 of the present application. In addition, the overcurrent capability of the connection member can be enhanced by the provision of the conductive portion 13.

Further, the first thickness H1 and the second thickness H2 are each between 0.2mm and 0.5 mm.

The first connection portion 11 is welded to the positive electrode 201 of the battery 200, and the second connection portion 12 is welded to the negative electrode 202 of the battery 200. In this embodiment, the thickness of the first connecting portion 11 and the second connecting portion 12 is set between 0.2mm and 0.5mm, so as to avoid the influence of the welding process on the battery 200 and reduce the overcurrent capacity of the connecting piece 100 caused by too small thickness, and avoid the influence of the too thick thickness on the welding effect of the first connecting portion 11 and the second connecting portion 12 and the corresponding battery 200, thereby ensuring the welding quality of the first connecting portion 11 and the second connecting portion 12 and the corresponding battery 200, and further ensuring the connecting effect of the connecting piece 100.

Thus, the present connector 100 is provided with the first thickness H1 and the second thickness H2 being smaller than the third thickness H3, so that the first connecting portion 11 and the second connecting portion 12 have relatively thinner thicknesses in the present connector 100, so as to facilitate the welding of the first connecting portion 11 and the positive electrode 201, and the welding of the second connecting portion 12 and the negative electrode 202.

Meanwhile, the connecting piece 100 of the present application sets both the first thickness H1 and the second thickness H2 between 0.2mm and 0.5mm, so as to ensure the welding effect of the first connecting portion 11 and the second connecting portion 12 with the battery 200. Thereby improving the connection stability of the connector 100 of the present application.

Referring to fig. 6, a top view of a connector 100 according to an embodiment of the present application is shown. Please refer to fig. 4 together.

As shown in fig. 6, the cross-sectional width dimension of the connection section 20 is a first width D1 in the direction perpendicular to the extension direction of the connection section 20, the first width D1 being between 8mm and 20 mm. On the one hand, based on the connection of the connection section 20 between two adjacent connection units 10, the connection section 20 is arranged such that a plurality of connection units 10 are connected in series and parallel with each other.

On the other hand, there is less current transfer between the batteries 200 based on the mutual parallel connection. When the current passes through the conductive part 13 to achieve the transmission between the first connection part 11 and the second connection part 12, the conductive part 13 generates heat under the effect of the current. The connection section 20 is provided such that heat generated by the conductive portion 13 can be released outwards through the connection section 20, thereby realizing a heat dissipation function of the connection section 20.

The heat dissipation function based on the connection section 20 is related to the size of the heat dissipation area of the connection section 20. It will be appreciated that when the first width D1 becomes larger, the heat dissipation area is also relatively large, and thus the heat dissipation capacity is also improved accordingly.

When the first width D1 is less than 8mm, heat generated from the two conductive parts 13 connected to the connection section 20 is difficult to be discharged outward through the connection section 20, and the temperature of the two batteries 200 connected to the conductive parts 13 may be affected due to the temperature rise. Thereby affecting the state of the battery 200. It is understood that when the external temperature of the battery 200 is too high, thermal runaway of the battery 200 may occur, thereby affecting the safety of the battery 200.

As shown in fig. 4, when the first width D1 is greater than 20mm, the disposition area of the temperature sensor 302 is reduced. The setting range based on the temperature sensor 302 is relatively fixed. It will be appreciated that a first width D1 greater than 20mm may affect the placement of the battery pack 300 of the present application. Meanwhile, interference may be generated between the remaining adjacent connectors 100, so that the battery 200 commonly connected to the adjacent connectors 100 may be shorted, and the use safety of the battery 200 may be affected.

Thus, the arrangement of the first width D1 of 8mm to 20mm can ensure the heat radiation capability of the connection section 20 and also the arrangement rationality of the connection member 100. On the other hand, the waste of the cost can be reduced.

In one embodiment, as shown in fig. 6, the cross-sectional width of the conductive portion 13 in the extending direction perpendicular to the conductive portion 13, i.e., in the first direction 001, is a second width D2, the second width D2 being between 20mm and 40 mm. The conductive part 13 is used to realize a series function of two batteries 200 connected to the connection unit 10, while the batteries 200 connected to each other in series have a relatively large current transmission therebetween. It will be appreciated that the conductive portion 13 may have a relatively strong overcurrent capability compared to the connection section 20.

Since the conductive portion 13 is connected between the first connection portion 11 and the second connection portion 12. When the current passes through the conductive part 13 to achieve the transmission between the first connection part 11 and the second connection part 12, the conductive part 13 generates heat under the effect of the current. And this part of the heat is also released outward from the conductive part 13, thereby realizing the heat dissipation function of the conductive part 13.

The heat dissipation function based on the conductive portion 13 is related to the size of the heat dissipation area of the conductive portion 13, and the conductive portion 13 also needs to have a stronger overcurrent capability than the connection section 20 to adapt to the current transmission between the first connection portion 11 and the second connection portion 12. And because the flow capacity is related to the size of the cross-sectional area. It can be appreciated that the increase of the second width D2 is beneficial to realizing the increase of the heat dissipation area and the improvement of the overcurrent function.

When the second width D2 is less than 20mm, the cross-sectional area of the conductive part 13 is relatively small, and it is difficult to adapt to the current transmission between the batteries 200 to which the first connection part 11 and the second connection part 12 are connected. Meanwhile, the corresponding heat dissipation area is relatively small, and it is also difficult to release the heat formed by the conductive part 13 and the current outwards through the conductive part 13.

As shown in fig. 4, when the second width D2 is greater than 40mm, the disposition area of the temperature sensor 302 is reduced. The setting range based on the temperature sensor 302 is relatively fixed. It will be appreciated that a second width D2 of greater than 40mm may affect the placement of the battery pack 300 of the present application. Meanwhile, interference may be generated with the remaining adjacent connection units 10, thereby causing a short circuit of the battery 200 commonly connected with the adjacent connection units 10, and affecting the use safety of the battery 200.

Thus, the arrangement of the second width D2 of 20mm to 40mm can ensure the overcurrent capability and the heat dissipation capability of the conductive portion 13, and also ensure the arrangement rationality of the connector 100. On the other hand, the waste of the cost can be reduced.

In one embodiment, referring back to fig. 4, the connector 100 further includes a runner hole 30, and the runner hole 30 is disposed on the connection section 20 and the conductive portion 13 and penetrates the connector 100. In the manufacturing process of the battery pack 300, in order to secure mutual insulation between the adjacent batteries 200, improve the air tightness between the adjacent batteries 200, and reduce the mutual influence of the heat of the batteries 200, it is necessary to fill the gaps between the batteries 200 with a foaming adhesive. And the first width D1 and the second width D2 of the connection section 20 and the conductive part 13 make it difficult for the foaming adhesive to be directly injected between the batteries 200.

Thereby, by disposing the flow passage holes 30 on the connection section 20 and the conductive part 13 such that the foaming glue can be poured between the batteries 200 through the flow passage holes 30, the installation of the battery pack 300 of the present application is achieved.

It is understood that, in another embodiment, when the first width D1 of the connecting section 20 does not affect the injection of the foaming glue, the runner hole 30 may be disposed only on the conductive portion 13. In another embodiment, when the second width D2 of the conductive portion 13 does not affect the injection of the foaming glue, the runner hole 30 may be disposed only on the connection section 20.

In one embodiment, as shown in fig. 4, the runner hole 30 provided on the conductive portion 13 is located relatively close to the temperature sensor 302. In order to ensure that the foaming glue can be completely filled between the cells 200, the positions of the flow passage holes 30 are relatively fixed.

In one embodiment, as shown in fig. 4, the flow passage hole 30 is further provided between the connection section 20 and the conductive portion 13. Specifically, the connection part of the connection section 20 and the conductive part 13 is provided with a runner hole 30, and the injection of the foaming glue is not affected by the arrangement of the runner hole, and the connection between the connection section 20 and the conductive part 13 is avoided, so that the manufacturing difficulty is reduced.

In the case where the position of the flow passage hole 30 is fixed. The runner hole 30 provided on the conductive portion 13 may be provided as a half hole to place the conductive portion 13 around the runner hole 30 in a position where the structure occupies the temperature sensor 302. Thereby avoiding the interference of the conductive portion 13 with the temperature sensor 302. Thereby ensuring the installation of the connector 100 of the present application.

In one embodiment, as shown in fig. 1, in the battery pack 300, a plurality of batteries 200 are arranged in sequence with a gap between at least two batteries 200, and a projection of the flow passage hole 30 in the height direction of the battery pack 300 is located in the gap 303.

Specifically, as shown in fig. 1 and fig. 4, the plurality of batteries 200 are sequentially arranged along the first direction 001 and the second direction 002, and a gap 303 is formed between two adjacent batteries 200, wherein the projection of the runner hole 30 along the third direction 003 is located in the gap 303, so that it is ensured that the foaming glue can be poured into the gap 303 between the batteries 200 through the runner hole 30 to improve the connection reliability between the two batteries 200, and further improve the overall structural strength.

Further, as shown in fig. 4, the cells 200 are cylindrical cells, a plurality of cells 200 are arranged in a row along a first direction 001 to form a battery pack, a plurality of battery packs are arranged along a second direction 002, and the cells 200 in the adjacent row of battery packs are staggered, so that gaps 303 are formed between the adjacent three cells 200, that is, the three cylindrical cells are adjacent to each other and form three vertexes of a triangle along the center of the surface on the same side in a third direction 003. Wherein gaps 303 are formed between the three cells 200. The flow passage hole 30 is disposed in the gap 303 and is located at the center of the gap 303. Namely, the center of the runner hole 30 is opposite to the center of the gap 303 along the third direction 003, so that the glue filling efficiency is improved, and the connection strength is ensured.

In one embodiment, as shown in fig. 2 and 4, the positive electrode 201 surrounds the periphery of the negative electrode 202. The shape of the first connection part 11 is arc-shaped, and the arc-shaped outer ring radius R1 of the first connection part 11 is smaller than the outer ring radius R2 of the positive electrode 201 of the battery 200. So that the first connection part 11 is entirely located on the positive electrode surface of the battery 200, so that the contact area of the first connection part 11 with the positive electrode 201 of the battery 200 is relatively large, so that the welding area of the first connection part 11 with the positive electrode 201 is relatively large, thereby ensuring the welding effect of the first connection part 11 with the positive electrode 201.

On the other hand, the arc shape also increases the cross-sectional area of the first connection portion 11, thereby increasing the overcurrent capacity of the first connection portion 11, so that the overcurrent capacity of the first connection portion 11 can also adapt to the current transmission between the batteries 200 connected to the connection unit 10 when the current transmission capacity between the batteries 200 connected to the first connection portion 11 and the second connection portion 12 is improved.

It will be appreciated that, in another embodiment, when the negative electrode 202 of the battery 200 surrounds the positive electrode 201, the second connection portion 12 may also be configured as an arc shape, and the radius of the outer circle of the arc shape corresponding to the second connection portion 12 is smaller than the radius of the outer circle of the negative electrode 202 of the battery 200. The applicant does not particularly limit this.

In the above embodiment, the center of the arc of the first connection portion 11 or the second connection portion 12 coincides with the center of the surface of the pole side, so that the lamination area of the first connection portion 11 or the second connection portion 12 and the surface of the pole of the battery 200 is increased while the related dimensional relationship is defined, and the contact area is further increased, and the overcurrent effect is increased.

In one embodiment, as shown in fig. 4, the connection member 100 further includes a positioning hole 40 when the positive electrode 201 surrounds the periphery of the negative electrode 202. The positioning hole 40 is disposed on the second connecting portion 12 and penetrates the connecting member 100. In order to secure the welding effect of the second connection portion 12 with the anode 202, the second connection portion 12 has a relatively large surface area. It will be appreciated that the provision of the locating holes 40 facilitates alignment of the second connection 12 with the negative electrode 202 via the locating holes 40 to facilitate welding of the second connection 12 with the negative electrode 202.

In another embodiment, when the negative electrode 202 of the battery 200 surrounds the positive electrode 201, the positioning hole 40 is disposed on the first connecting portion 11 and penetrates the connecting member 100, so as to align the first connecting portion 11 with the positive electrode 201 through the positioning hole 40.

In one embodiment, as shown in fig. 4, the first connection portions 11 of the respective connection units 10 are located on the same side of the connection section 20 in the extending direction of the connection section 20, that is, in the first direction 001. To facilitate fabrication of the connector 100 of the present application.

In one embodiment, referring back to fig. 2 and 5, the first connection portion 11 and the second connection portion 12 have a height difference along the third direction 003. Based on the third direction 003, the positive electrode 201 and the negative electrode 202 of the battery 200 are also staggered with each other. It will be appreciated that the positive electrode 201 and the negative electrode 202 of the same cell 200 may be connected to different two connectors 100 simultaneously, thereby enabling the series connection and parallel connection of multiple cells 200.

In one embodiment, when the first connection portion 11 and the second connection portion 12 have a height difference along the third direction 003, a cylindrical battery may be adapted, that is, when the positive electrode and the negative electrode of the cylindrical battery are located on the same side, the post is one of the positive electrode and the negative electrode, and the surface of the battery 200 where the post is located is the other one of the positive electrode and the negative electrode. In other embodiments, the above structural design may also be adapted to other battery structures with height differences between the positive and negative electrodes.

In one embodiment, the third thickness H3 of the conductive portion 13 is between 0.3mm and 1mm in the third direction 003. The overcurrent capacity based on the conductive part 13 is related to the cross-sectional area of the conductive part 13. It will be appreciated that the provision of the third thickness H3 of 0.3mm-1mm ensures that the current carrying capacity of the conductive portion 13 can be matched to the current transfer between the first connection portion 11 and the second connection portion 12.

It should be appreciated that the terms "first," "second," and the like 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 defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

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

It is to be understood that the application of the present application is not limited to the examples described above, but that modifications and variations can be made by a person skilled in the art from the above description, all of which modifications and variations are intended to fall within the scope of the claims appended hereto. Those skilled in the art will recognize that the full or partial flow of the embodiments described above can be practiced and equivalent variations of the embodiments of the present utility model are within the scope of the appended claims.

Claims (14)

1. A connecting piece for connecting a plurality of batteries, comprising at least two connecting units and at least one connecting section, wherein each connecting unit comprises a first connecting part, a second connecting part and a conductive part, the first connecting part is used for connecting the positive electrode of one battery, the second connecting part is used for connecting the negative electrode of the other battery, the conductive parts are connected with the first connecting part and the second connecting part, and any two adjacent conductive parts are connected through the connecting sections so as to connect the two connecting units;

the thickness of the first connecting portion and the second connecting portion is smaller than that of the conductive portion.

2. The connector of claim 1, wherein the first and second connector portions each have a thickness of between 0.2mm and 0.5 mm.

3. A connection according to claim 1, wherein the cross-sectional width of the connection section is between 8mm and 20mm in a direction perpendicular to the extension of the connection section.

4. A connector according to claim 1, wherein the cross-sectional width of the conductive portion is between 20mm and 40mm in a direction perpendicular to the extension of the conductive portion.

5. The connector of claim 1, further comprising a runner hole disposed in the connection section and/or the conductive portion and extending through the connector.

6. The connector of claim 1, further comprising a runner hole further disposed at a junction of the connection section and the conductive portion.

7. The connector of any one of claims 1-6, further comprising a locating hole disposed through the connector at the second connector portion and/or the first connector portion.

8. The connector according to any one of claims 1 to 6, wherein a height difference is provided between the first connecting portion and the second connecting portion in a thickness direction of the connector, so that a positive electrode and a negative electrode of the battery can be electrically connected to the two connectors, respectively.

9. A connecting member according to any one of claims 1-6, wherein the first connection portions of two of the connection units connected to the connection section are located on the same side of the connection section in the extending direction of the connection section.

10. A connector according to any one of claims 1-6, wherein the thickness of the conductive portion is between 0.3mm and 1 mm.

11. A battery pack comprising a battery tray, a plurality of batteries and a connector according to any one of claims 1 to 10, the plurality of batteries being arranged in the battery tray in sequence, the connector being connected between adjacent ones of the batteries.

12. The battery pack according to claim 11, wherein the positive electrode of the battery surrounds the periphery of the negative electrode of the battery, the first connection portion is arc-shaped, and the arc-shaped outer ring radius of the first connection portion is smaller than the outer ring radius of the positive electrode of the battery;

or, the negative electrode of the battery surrounds the periphery of the positive electrode of the battery, the shape of the second connecting part is arc-shaped, and the radius of the arc-shaped outer ring of the second connecting part is smaller than that of the outer ring of the negative electrode of the battery.

13. The battery pack according to claim 11, wherein the connecting member has a flow passage hole, a plurality of the cells are arranged in order with a gap between at least two of the cells, and a projection of the flow passage hole in a height direction of the battery pack is located in the gap.

14. The battery pack according to claim 13, wherein the battery is a cylindrical battery, three of the cylindrical batteries are adjacent to each other and form three apexes of a triangle along a center of a surface on the same side in a height direction of the battery pack, wherein the gap is formed between the three cylindrical batteries, and a center of the flow passage hole is opposite to a center of the gap in the height direction of the battery pack.