CN217062444U - Battery pack - Google Patents

Abstract

The utility model relates to a battery technology field provides a group battery. The battery pack includes: at least two batteries; a bus bar connecting at least two of the batteries; the flexible conductive piece is used for collecting the voltage and/or the temperature of the battery, and the plane where the flexible conductive piece is located is not coplanar with the plane where the bus bar is located. The utility model provides a group battery is through arranging flexible electrically conductive piece and busbar in different planes, produces the harm to flexible electrically conductive piece when can avoiding other structures to warp or shift to can promote the security performance of group battery.

Description

Battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery pack.

Background

In the existing battery pack, a flexible conductive piece is adopted for information transmission.

Because the series-parallel connection form of the batteries in the battery pack is complex, the flexible conductive piece is difficult to arrange due to space reasons, and the flexible conductive piece is easy to damage due to mistaken collision of other structures in the battery pack.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack to guarantee flexible electrically conductive piece safety, and promote the security performance of battery pack.

In order to achieve the above purpose, the utility model provides a following technical scheme:

according to a first aspect of the present invention, there is provided a battery pack, comprising:

at least two batteries;

a bus bar connecting at least two of the batteries;

the flexible conductive piece is used for collecting the voltage and/or the temperature of the battery, and the plane of the flexible conductive piece is not coplanar with the plane of the bus bar.

The utility model provides a different planes are arranged in through with flexible electrically conductive piece and busbar to the group battery, produce the harm to flexible electrically conductive piece when can avoiding other structures to warp or shift to can promote the security performance of group battery.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art.

Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram illustrating the structure of a battery pack according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of the stent of FIG. 1;

fig. 3 is an enlarged schematic view of a part of the structure in fig. 1.

The reference numerals are illustrated below:

100. a battery; 200. a bus bar; 300. a flexible conductive member; 400. a support; 410. a body portion; 411. a placement chamber; 420. an extension portion; 421. a first recess; 430. a second recess; 440. a fixed part; 500. an information acquisition terminal; 600. a connector.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

The embodiment of the application provides a battery pack. Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application. As shown in fig. 1, the battery pack provided by the embodiment of the present application includes:

at least two batteries 100;

a bus bar 200, the bus bar 200 connecting at least two batteries 100;

and the flexible conductive piece 300 is used for collecting the voltage and/or the temperature of the battery 100, and the plane of the flexible conductive piece 300 is not coplanar with the plane of the bus bar 200.

It should be noted that, in the battery pack provided in the embodiment of the present application, the flexible conductive member 300 and the bus bar 200 are disposed on different planes, so that damage to the flexible conductive member 300 caused by deformation or displacement of other structures can be avoided, and thus, the safety performance of the battery pack can be improved.

Specifically, as shown in fig. 1, the flexible conductive member 300 is shown as a Flexible Printed Circuit (FPC). It should be understood that the flexible conductive device 300 may also be other flexible structures with signal transmission function, and may be specifically configured according to the requirement, which is not described herein again.

With continued reference to the structure shown in fig. 1, the bus bar 200 connects at least two batteries 100 to realize series-parallel connection between the batteries 100, thereby satisfying the capacity requirement of the battery pack. Illustratively, as shown in fig. 1, the bus bar 200 is disposed at one side of the battery 100 in a direction a. If the bus bar 200 fails to connect with the battery 100 due to shaking, the bus bar 200 will shift, and at this time, since the plane of the flexible conductive member 300 is not coplanar with the plane of the bus bar 200, the shift of the bus bar 200 will not affect the structure of the flexible conductive member 300, so as to prevent the flexible conductive member 300 from being touched by mistake, and improve the safety of the battery pack.

In addition, when the bus bar 200 needs to be replaced along the direction a, and the like, the flexible conductive piece 300 and the bus bar 200 do not interfere with each other because the planes of the flexible conductive piece 300 and the bus bar 200 are not coplanar. Therefore, the bus bar 200 can be directly operated in the direction a without affecting the flexible conductive member 300, thereby reducing the difficulty of operation and ensuring the safety of the battery 100.

It is noted that the battery 100 is generally provided with an explosion-proof structure to timely release air when gas is generated in the battery 100. Illustratively, the explosion-proof valve bursts open in direction a to vent. At this point, flexible conductive member 300 is not in the path of the air bleed. Therefore, flexible conductive member 300 is not affected by the leakage of the explosion-proof valve, so that the safety of the battery pack can be improved.

In one embodiment, each cell includes a first electrode terminal and a second electrode terminal.

The first electrode terminal and the second electrode terminal have opposite polarities, and are insulated from each other. Specifically, when the first electrode terminal is a positive polarity terminal, the second electrode terminal is a negative polarity terminal, whereas when the first electrode terminal is a negative polarity terminal, the second electrode terminal is a positive polarity terminal.

In a specific embodiment, the first electrode terminal and the second electrode terminal are both terminals, and the first electrode terminal and the second electrode terminal are disposed on two opposite sides of the battery 100 along the direction a. It should be understood that when the batteries 100 are placed in the battery case, each battery 100 may be arranged laterally, provided that the bottom of the battery case is the bottom surface, and the direction a is parallel to the bottom surface of the battery case. Of course, the batteries 100 may be disposed vertically in the battery box, which is not described herein.

It is noted that the flexible conductive member 300 may be connected to the bus bar 200 to collect a temperature/voltage signal of the battery 100. In one embodiment, there may be provided: the plane of the flexible conductive member 300 is perpendicular to the plane of the bus bar 200, as shown in fig. 1 for example.

It should be noted that, when the plane of the flexible conductive member 300 is perpendicular to the plane of the bus bar 200, the electrical connection path between the bus bar 200 and the flexible circuit board is short, so as to reduce the material consumption of the flexible conductive member 300, thereby reducing the production cost. Meanwhile, the flexible circuit board layout path is shortened, the space can be saved, and the space utilization rate in the battery pack is improved, so that other structures can be conveniently arranged in the battery pack.

In an embodiment, please refer to the structure shown in fig. 2 in combination with fig. 1, the battery pack provided in the embodiment of the present application further includes a bracket 400, where the bracket 400 includes a main body 410 and an extension portion 420, and the extension portion 420 extends from the main body 410 and forms an included angle with the main body 410; the bus bar 200 is disposed on the body portion 410, and the flexible conductive device 300 is disposed on the extension portion 420.

It should be noted that, the bus bar 200 and the flexible conductive member 300 are disposed on the bracket 400, so that the integration level of the internal structure of the battery pack can be improved, the internal structure of the battery pack can be conveniently mounted and dismounted, and meanwhile, the internal structure layout of the battery pack can be optimized, and the utilization rate of the internal space of the battery pack can be improved.

It should be understood that flexible conductive element 300 is made of a flexible material, and flexible conductive element 300 is placed on support 400, so that flexible conductive element 300 can be protected, and flexible conductive element 300 is prevented from being damaged due to collision in the using process, and the service life of flexible conductive element 300 is prolonged. Likewise, the bracket 400 may support the busbar 200 to extend the service life of the busbar 200.

In addition, it should be noted that the bracket 400 may provide a rigid support for the connection between the flexible conductive member 300 and the bus bar 200, so as to improve the stability of the connection relationship between the flexible conductive member 300 and the bus bar 200, thereby improving the safety performance of the battery pack.

In one embodiment, as shown in fig. 1 and 2, the body portion 410 is perpendicular to the extension portion 420. Of course, other angles between the body portion 410 and the extension portion 420 may be provided, which are not described herein.

It should be noted that, when the body portion 410 and the extending portion 420 are vertically disposed, it is convenient to mount the flexible conductive member 300 and the bus bar 200, so as to meet the requirement that the plane of the flexible conductive member 300 is perpendicular to the plane of the bus bar 200. Meanwhile, the vertical arrangement between the body part 410 and the extension part 420 can facilitate the arrangement of other structures in the battery pack.

It is noted that when the bracket 400 is used to mount the bus bar 200 and the flexible conductive member 300, an insulating structure is required to prevent short circuit.

In one embodiment, the insulating structure may be one or more of an insulating coating, an insulating film, or an insulating tape. It should be noted that the insulating structure may be wrapped on the surface of the bracket 400, and may also be wrapped on the surfaces of the busbar 200 and the flexible conductive device 300, which may be specifically configured as required, and will not be described herein again.

In another embodiment, the bracket 400 is made of an insulating material. It should be understood that the bracket 400 may be partially made of an insulating material or may be entirely made of an insulating material. When the holder 400 is entirely made of an insulating material, the insulating property between the holder 400 and the bus bar 200 and the flexible conductive members 300 can be more improved, and at the same time, the holder 400 can also be used as an insulating plate to insulate the battery 100 from other structures.

Illustratively, when the stent 400 is made of an insulating material, the insulating material may be selected from one or more of PC (polycarbonate), or PP (polypropylene), or a composite material of PC and ABS (acrylonitrile butadiene styrene copolymer).

In one embodiment, the extension 420 is provided with a first recess 421, and at least a portion of the flexible conductive member 300 is disposed within the first recess 421.

It should be noted that, when the flexible conductive device 300 is disposed in the recess, the size of the whole formed by the bracket 400 and the flexible conductive device 300 can be reduced, so that the space occupied by the flexible conductive device 300 outside the bracket 400 alone is reduced, thereby increasing the space utilization rate in the battery pack.

In a specific embodiment, as shown in fig. 3, the opening of the first recess 421 is located at a side of the extension portion 420 facing away from the battery 100, so as to facilitate the mounting and dismounting operations of the flexible conductive member 300 in the first recess 421. Of course, it is also possible to set as required: the opening of the first recess 421 is located at a side of the extension portion 420 facing the battery 100, and is not described herein again.

When the structure of the bracket 400 is specifically configured, the direction in which the extension part 420 extends from the main body part 410 and the number of the extension parts 420 extending from the main body part 410 can be set according to requirements.

Illustratively, as shown in fig. 2, in the direction b, the body portion 410 is provided with an extending portion 420 at each side, and the extending portion 420 is provided with a first recess 421 extending in the direction c. It is to be understood that the directions a, b and c are perpendicular to each other two by two.

It is noted that it is also possible to provide: along the direction b, a plurality of extending portions 420 are disposed on each side of the body portion 410, and the plurality of extending portions 420 are disposed at intervals along the direction c to cooperate with and form an effective support for the flexible conductive member 300.

Of course, the following can be set according to the requirement: along the direction b, only one side of the main body 410 is provided with an extension portion 420, which is not described herein again.

In one embodiment, with continuing reference to the structures shown in fig. 2 and fig. 3, the size of the first recess 421 is larger than that of the flexible conductive device 300, so as to improve the protection effect on the flexible conductive device 300 and improve the space utilization rate in the battery pack.

In a specific embodiment, the depth of the first recess 421 is greater than the thickness of the flexible conductive element 300 along the direction b, so as to ensure that the flexible conductive element 300 does not exceed the first recess 421 as much as possible, thereby improving the space utilization rate in the battery pack.

It should be noted that, when the first recess 421 is disposed along the direction b, the structural strength of the bracket 400 needs to be considered, so as to avoid the first recess 421 from being too deep and the extension portion 420 from being broken.

In another specific embodiment, the size of the first recess 421 is larger than the size of the flexible conductive member 300 along the direction c and/or the direction a, so that the flexible conductive member 300 is placed inside the first recess 421.

It should be noted that, when the size of the first recess 421 along the direction c and/or the direction a is larger, the adaptability of the bracket 400 may also be improved, so that the bracket 400 may be matched with flexible conductive members 300 with different sizes.

Of course, when the first recess 421 is disposed, the two specific embodiments may be combined, and are not described herein again.

In one embodiment, the first recess 421 is integrally formed with the bracket 400 when the bracket 400 is injection molded; in another embodiment, after the formation of the stent 400, the first recess 421 is formed by cutting.

Of course, the first recess 421 can also be formed by other processes, which are not described herein again.

When the flexible conductive member 300 is disposed in the first recess 421, the flexible conductive member 300 may be clamped inside the first recess 421, or even, the fixing bracket 400 and the flexible conductive member 300 may be assisted by bonding, hot melting, or fastening, so as to enhance the stability of the relative position between the flexible conductive member 300 and the first recess 421 after the flexible conductive member 300 is placed in the first recess 421, thereby preventing the flexible conductive member 300 from coming off from the first recess 421, and improving the protection effect on the flexible conductive member 300.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries 100, and the batteries 100 may be square batteries 100 or cylindrical batteries 100. When the battery 100 is a prismatic battery 100, the battery module may further include an end plate, and the end plate and the holder 400 are used to fix the plurality of batteries 100; when the battery 100 is a cylindrical battery 100, the battery module may further include a bracket, and the battery 100 may be fixed to the bracket.

It should be noted that, in the battery pack provided in the embodiment of the present application, the bracket 400 may integrate a bracket function to fix the battery 100, so as to further improve the integration of the battery pack and improve the space utilization rate in the battery pack.

The battery pack includes a plurality of batteries 100 and a battery case for holding the plurality of batteries 100.

It should be noted that the battery pack includes a plurality of batteries 100, and the plurality of batteries 100 are disposed in the battery box. The plurality of batteries 100 may be mounted in the battery case after forming a battery module. Alternatively, the plurality of batteries 100 may be directly disposed in the battery box, that is, the plurality of batteries 100 may be fixed by the battery box without grouping the plurality of batteries 100.

When arranging the battery 100 in the battery pack, taking the battery pack as a battery module as an example, the following principles are generally followed: forming the cells 100 arranged more in one direction to form the long sides of the battery module and the cells 100 arranged less in the other direction to form the short sides of the battery module; the plurality of battery modules are arranged along the short side direction so as to be conveniently arranged in the battery box body.

Referring to fig. 3 in conjunction with fig. 2, in one embodiment, the main body 410 has a long side extending along a direction c and a short side extending along a direction b, and the extending portion 420 is located at the long side of the main body 410.

It should be noted that, the extension portion 420 is disposed at the long side of the main body portion 410, and can accommodate as many flexible conductive members 300 as possible, so as to further improve the protection effect on the flexible conductive members 300, and thus improve the safety performance of the battery pack.

In one embodiment, the body portion 410 and the extension portion 420 are integrally formed to simplify the manufacturing process and reduce the manufacturing cost.

It should be noted that, since the main body 410 and the extension 420 are integrally formed, the structural strength of the bracket 400 is high, and the service life of the bracket 400 can be prolonged.

In another specific embodiment, the body portion 410 and the extension portion 420 are of a split structure, each portion is separately prepared according to the requirement, and after the preparation is completed, the body portion 410 and the extension portion 420 are connected by gluing or the like.

With continued reference to the structure shown in fig. 2 and 3, in one embodiment, the body portion 410 is provided with a placing cavity 411, and the bus bar 200 is placed in the placing cavity 411.

It should be noted that, the bus bar 200 is placed in the placing cavity 411, so that the size of the whole formed by the bus bar 200 and the bracket 400 can be reduced, the space occupied by the bus bar 200 outside the bracket 400 alone is reduced, and the space utilization rate in the battery pack can be improved. Meanwhile, the support 400 can support the bus bar 200, and the bus bar 200 is prevented from being damaged by collision in the use process, so that the safety performance of the battery pack can be improved.

It should be noted that, referring to the structure shown in fig. 2 and fig. 3, since the bracket 400 is disposed between the bus bar 200 and the battery 100, a through hole is disposed in the placing cavity 411 to ensure that the bus bar 200 and the battery 100 can be effectively connected.

In one embodiment, the bus bar 200 is clamped in the placing cavity 411, and the placing cavity 411 limits the bus bar 200 to improve the stability of the connection relationship between the bus bar 200 and the battery 100. It should be noted that, with continued reference to the structure shown in fig. 2 and fig. 3, due to the capacity requirement of the battery pack, the batteries 100 in the battery pack need to be connected in series and in parallel in a certain number, and at this time, the bus bar 200 needs to be divided into a plurality of sub bus bars 200.

It should be understood that insulation is required between the sub-buses 200 to prevent a short circuit phenomenon. Specifically, as shown in fig. 2 and 3, the rack 400 is provided with a plurality of sub-placing cavities 411, one sub-bus bar 200 is placed in each placing cavity 411, and when the rack 400 is integrally made of an insulating material, the rack 400 can insulate and protect the sub-bus bar 200 in each placing cavity 411, so as to further improve the safety performance of the battery 100.

In one embodiment, with continuing reference to the structure shown in fig. 1, the battery pack provided in the embodiments of the present application further includes an information collecting terminal 500, and the flexible conductive member 300 is connected to the bus bar 200 through the information collecting terminal 500 to collect the voltage and/or temperature of the battery 100. Illustratively, the information collecting terminal 500 is a nickel plate. Of course, the information collecting terminal 500 may have other structures, which are not described herein again.

With continued reference to the structure shown in fig. 1, one end of each information collecting terminal 500 is connected to the sub bus bar 200, the voltage and/or temperature signals of the plurality of batteries 100 connected thereto are collected through the sub bus bar 200, and the other end of each information collecting terminal 500 is connected to the flexible conductive member 300 to transmit the collected signals.

It should be noted that each sub bus bar 200 may be connected to an information collecting terminal 500 to collect the conditions of the battery 100 inside the battery pack in more detail, or some sub bus bars 200 may be connected to the information collecting terminal 500 to reasonably arrange the space inside the battery pack and improve the space utilization.

It is to be noted that, when the information collecting terminal 500 is connected to each sub bus bar 200, it may be provided that only one information collecting terminal 500 is connected to each sub bus bar 200, or it may be provided that a plurality of information collecting terminals 500 are connected to each sub bus bar 200. The setting can be specifically performed according to the requirements, and details are not repeated herein.

In one embodiment, with continued reference to the structure shown in fig. 2 and 3, the bracket 400 is further provided with a second recess 430, and the second recess 430 is communicated with the first recess 421 and the placing cavity 411;

the information collecting terminal 500 is disposed in the second recess 430.

It should be noted that, the information collecting terminal 500 is disposed in the second recess 430, so that the size of the whole formed by the information collecting terminal 500 and the bracket 400 can be reduced, and the occupied space of the information collecting terminal 500 outside the bracket 400 is reduced, thereby improving the space utilization rate in the battery pack. Meanwhile, the support 400 can support the information acquisition terminal 500, so that the information acquisition terminal 500 is prevented from being damaged by collision in the use process, and the safety performance of the battery pack can be improved.

In one embodiment, with continued reference to the structure shown in fig. 2 and fig. 3, the bracket 400 further includes a fixing portion 440, the fixing portion 440 is connected to the body portion 410, and the fixing portion 440 is used for fixing the connector 600.

It should be noted that the fixing portion 440 may form an effective support for the connector 600, so as to facilitate the connection of the connector 600 with the flexible conductive member 300, and to lead out the temperature and/or voltage signal in the battery 100.

It is noted that the fixing portion 440 may be disposed on any side of the body portion 410 as required. Illustratively, as shown in fig. 2, the fixing portion 440 is provided at a short side of the body portion 410 to make reasonable use of the space inside the battery pack.

When the connector 600 is fixed on the fixing portion 440, the connector can be connected by means of snap-fit, gluing or hot-melt fixing, and details are not repeated.

In one embodiment, with continued reference to the structure shown in fig. 2, the bracket 400 may be provided with a connecting lug to facilitate the battery pack to be fixed or hoisted to other structures in the electric vehicle through the bracket 400.

It should be noted that, through the engaging lug fixing bracket 400 and other structures in the battery 100 automobile, the stability of the battery pack after installation can be improved, and the influence of factors such as shaking on the battery 100 in the use process is reduced, so that the safety performance of the battery pack can be improved.

It should be noted that, when the connecting lugs are specifically arranged on the bracket 400, the number and the arrangement positions of the connecting lugs can be set according to requirements, and are not described herein again.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims. It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery pack, comprising:

at least two batteries (100);

a busbar (200), said busbar (200) connecting at least two of said batteries (100);

a flexible conductive member (300), wherein the flexible conductive member (300) is used for collecting the voltage and/or the temperature of the battery (100), and the plane of the flexible conductive member (300) is not coplanar with the plane of the bus bar (200).

2. Battery according to claim 1, characterized in that the plane of said flexible conductive member (300) is perpendicular to the plane of said busbar (200).

3. The battery pack of claim 2, further comprising a bracket (400), the bracket (400) comprising a body portion (410) and an extension portion (420), the extension portion (420) extending from the body portion (410) and having an angle with the body portion (410);

the bus bar (200) is arranged on the body part (410), and the flexible conductive piece (300) is arranged on the extension part (420).

4. The battery according to claim 3, wherein said extension (420) is provided with a first recess (421), at least part of said flexible conductive member (300) being placed in said first recess (421).

5. The battery according to claim 4, wherein the size of said first recess (421) is greater than the size of said flexible conductive member (300).

6. The battery pack according to claim 5, wherein the body part (410) has a long side and a short side, and the extension part (420) is located at the long side of the body part (410).

7. The battery pack according to claim 4, wherein the body portion (410) is provided with a placing cavity (411), and the bus bar (200) is placed in the placing cavity (411).

8. The battery pack according to claim 7, further comprising an information collecting terminal (500), wherein the flexible conductive member (300) is connected to the bus bar (200) through the information collecting terminal (500) to collect the voltage and/or temperature of the battery (100), and the bracket (400) is further provided with a second recess (430), and the second recess (430) communicates the first recess (421) and the placing cavity (411);

the information acquisition terminal (500) is disposed within the second recess (430).

9. The battery pack according to any one of claims 3 to 8, wherein the bracket (400) further comprises a fixing portion (440), the fixing portion (440) being connected with the body portion (410);

the fixing part (440) is used for fixing the connector (600).

10. The battery according to any of claims 3-8, characterized in that the battery (100) is a cylindrical battery (100).

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