CN217306690U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack which comprises a separation beam, a first bus bar and a second bus bar, wherein both sides of the separation beam are provided with at least one battery component; the first bus bar is arranged on the separation beam; the second busbar is connected with the two battery components positioned on the two sides of the separation beam, and at least part of the second busbar and the first busbar are arranged at intervals along the height direction of the battery pack, so that the second busbar and the first busbar arranged on the separation beam can be prevented from interfering, and the safety of the battery pack is improved.

Description

Battery pack

Technical Field

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

Background

Among the correlation technique, when the discharge socket and the relay of battery package were placed respectively in battery package front and back position, the two need realize the electricity through longer busbar and connect, and the copper bar heat production is great, need place on the crossbeam in the middle, but set up when connecting through leading the busbar between the battery pack of crossbeam both sides, lead to the busbar emergence of electrical drainage and middle easily and interfere, cause the short circuit, cause the safety risk.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack to improve the security of battery pack.

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

the utility model provides a battery pack, include:

the battery pack comprises a separation beam, wherein at least one battery pack is arranged on each of two sides of the separation beam;

the first bus bar is arranged on the separation beam;

and the second bus bar is connected with the two battery assemblies positioned on two sides of the separation beam, and at least part of the second bus bar and the first bus bar are arranged at intervals along the height direction of the battery pack.

The utility model provides a battery pack, because the at least part of second busbar and first busbar set up along the direction of height of battery pack at an interval, can avoid the second busbar to take place to interfere with the first busbar that sets up on separating the roof beam to the security of battery pack has been improved.

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 structural diagram of a battery pack provided in this embodiment;

FIG. 2 is a schematic structural diagram of a second bus bar in the present embodiment;

fig. 3 is a schematic structural diagram of a modification of the battery pack provided in the present embodiment;

fig. 4 is a partial schematic structural view of another modification of the battery pack provided in this embodiment;

FIG. 5 is an enlarged view of a portion of FIG. 4 at M;

fig. 6 is a schematic structural diagram of another modification of the battery pack provided in this embodiment.

The reference numerals are illustrated below:

100. a first bus bar; 101. a first sub bus bar; 102. a second sub bus bar; 200. a second bus bar; 201. a first connection section; 202. a first vertical section; 203. a transverse segment; 204. a second vertical section; 205. a second connection section; 210. avoiding a space; 300. a partition beam; 400. a battery pack case; 401. a base plate; 402. a frame; 403. a first accommodating space; 404. a second accommodating space; 410. a first charge-discharge interface; 420. a second charge-discharge interface; 500a, a first battery assembly; 500b, a second battery assembly; 500c, a third battery assembly; 500d, a fourth battery pack; 501. a first polarity lead-out terminal; 502. a second polarity terminal; 510. a first polarity master output; 520. a second polarity master output; 600a, a first conductive member; 600b, a second conductive member; 700a, a first BDU; 700b, second BDU.

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 explicitly specified or limited otherwise, 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; 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 this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

Referring to fig. 1 to 6, the present embodiment provides a battery pack including a partition beam 300, a first bus bar 100, and a second bus bar 200, at least one battery assembly being disposed on both sides of the partition beam 300; the first bus bar 100 is disposed on the partition beam 300; the second bus bar 200 connects two battery modules located at both sides of the partition beam 300, and at least a portion of the second bus bar 200 and the first bus bar 100 are spaced apart in the height direction of the battery pack.

In the battery pack provided by the embodiment, at least part of the second bus bar 200 and the first bus bar 100 are arranged at intervals in the height direction of the battery pack, so that the second bus bar 200 and the first bus bar 100 arranged on the partition beam 300 can be prevented from interfering with each other, and the safety of the battery pack is improved.

In some embodiments, the battery pack further includes a battery pack case 400, a battery receiving space is formed inside the battery pack case 400, the battery pack case 400 includes a bottom plate 401 and a frame 402, the frame 402 is disposed around the outer circumference of the bottom plate 401, and the partition beam 300 is disposed inside the frame 402 to partition the battery receiving space. The height direction of the battery pack refers to a direction perpendicular to the bottom plate 401, and the arrow direction Z in fig. 1 indicates the height direction of the battery pack.

It should be understood that the fact that at least a portion of the second bus bar 200 and the first bus bar 100 are spaced apart in the height direction of the battery pack in the present embodiment means that at least a portion of the second bus bar 200 and the first bus bar 100 are not in direct contact in the height direction of the battery pack, specifically, a gap may be provided between at least a portion of the second bus bar 200 and the first bus bar 100 in the height direction of the battery pack, an insulating layer may be provided on an outer surface of at least a portion of the first bus bar 100 and at least a portion of the second bus bar 200, the insulating layer is located in the gap, and the insulating layer of the first bus bar 100 and the insulating layer of the second bus bar 200 may or may not be in contact. At least a portion of the second bus bar 200 is a portion of the second bus bar 200 overlapping a projection of the first bus bar 100 on the bottom plate 401.

Illustratively, the partition beam 300 is located at a middle position of the battery pack case 400 to partition the battery receiving space into a first receiving space 403 and a second receiving space 404, at least one battery assembly is disposed in the first receiving space 403, and at least one battery assembly is disposed in the second receiving space 404.

Illustratively, the number of battery assemblies in the first receiving space 403 is the same as the number of battery assemblies in the second receiving space 404.

Each cell assembly has a first polarity lead 501 and a second polarity lead 502, the polarity of the first polarity lead 501 being opposite to the polarity of the second polarity lead 502, e.g., the first polarity lead 501 is a positive lead and the second polarity lead 502 is a negative lead. The polarities of the first polarity outlet 501 and the second polarity outlet 502 may be interchanged.

When the second bus bar 200 connects two battery packs located at both sides of the partition beam 300, the first polarity lead-out terminal 501 of one battery pack and the second polarity lead-out terminal 502 of the other battery pack may be connected.

Note that the second bus bar 200 may be connected to the first polarity terminals 501 of the two battery modules at the same time, or may be connected to the second polarity terminals 502 of the two battery modules at the same time.

Referring to fig. 1, a battery assembly, namely a first battery assembly 500a, is disposed in the first receiving space 403; a battery assembly, designated as a second battery assembly 500b, is disposed in the second receiving space 404.

In one embodiment, the second busbar 200 has an escape space 210, and at least a portion of the first busbar 100 is located within the escape space 210.

For example, referring to fig. 1 and 2, the second bus bar 200 is bent toward the separating beam 300 to form an escape space 210, and at least a portion of the first bus bar 100 is located in the escape space 210.

The avoidance space 210 is in the shape of a straight groove, and the notch of the straight groove is away from the partition beam 300. Specifically, referring to fig. 2, the second bus bar 200 includes a first connection section 201, a first vertical section 202, a horizontal section 203, a second vertical section 204, and a second connection section 205 that are integrally formed, the first connection section 201 is connected to a first polarity outlet 501 of a first battery assembly 500a, the second connection section 205 is connected to a second polarity outlet 502 of a second battery pack, the first vertical section 202, the horizontal section 203, and the second vertical section 204 form a bypass space 210, and the horizontal section 203 is located between the first bus bar 100 and the partition beam 300, that is, the horizontal section 203 and the first bus bar 100 are spaced apart in the height direction of the battery pack. In this way, interference between the second bus bar 200 and the first bus bar 100 can be avoided, and the space between the first bus bar 100 and the partition beam 300 can be fully utilized, thereby improving the utilization rate of the internal space of the battery pack.

In one embodiment, the battery assembly includes a plurality of cells stacked along the length of the partition beam 300 (as indicated by the arrow direction X in fig. 3). Illustratively, the plurality of cells within each cell assembly are connected in series.

In some embodiments, the battery is a prismatic battery, and in particular, the body of the battery is approximately rectangular in shape. The first and second polarity leads 501 and 502 of the battery may both be located on the same side of the battery.

The battery may be a cylindrical battery.

In one embodiment, the number of the battery assemblies is plural, and two adjacent battery assemblies located on the same side of the partition beam 300 are connected by a conductive member located on a side of the battery assemblies remote from the first bus bar 100.

Because the conductive piece and the first bus bar 100 can generate heat, the conductive piece is arranged on one side of the battery assembly far away from the first bus bar 100, heat can be effectively prevented from being concentrated at the middle position of the battery pack, and thermal runaway is avoided.

For example, referring to fig. 3, two battery assemblies are disposed on both sides of the partition beam 300, that is, two battery assemblies, which are named as a first battery assembly 500a and a third battery assembly 500c, respectively, are disposed in the first receiving space 403; two battery packs, namely a second battery pack 500b and a fourth battery pack 500d, are disposed in the second receiving space 404. The first battery assembly 500a and the second battery assembly 500b are oppositely disposed at both sides of the partition beam 300, and the third battery assembly 500c and the fourth battery assembly 500d are oppositely disposed at both sides of the partition beam 300.

The number of the conductive members is two, and the two conductive members are named as a first conductive member 600a and a second conductive member 600b, respectively. The first battery assembly 500a and the third battery assembly 500c are connected by a first conductive member 600a, the first conductive member 600a is located on the side of the first battery assembly 500a and the second battery assembly 500b away from the first bus bar 100; the second battery assembly 500b and the fourth battery assembly 500d are connected by a second conductive member 600b, and the second conductive member 600b is located on the side of the second battery assembly 500b and the fourth battery assembly 500d away from the first bus bar 100.

Illustratively, one end of the first conductive member 600a is connected to the first polarity terminal 501 of the first battery assembly 500a, and the other end of the first conductive member 600a is connected to the second polarity terminal 502 of the third battery assembly 500 c.

It should be noted that one end of the first conductive member 600a may be connected to the second polarity terminal 502 of the first battery pack 500a, and the other end of the first conductive member 600a may be connected to the first polarity terminal 501 of the third battery pack 500 c. Both ends of the first conductive member 600a may be simultaneously connected to the first polarity terminals 501 of the first battery assembly 500a and the third battery assembly 500c, and both ends of the first conductive member 600a may be simultaneously connected to the second polarity terminals 502 of the first battery assembly 500a and the third battery assembly 500 c.

Illustratively, one end of the second conductive member 600b is connected to the second polarity terminal 502 of the second battery assembly 500b, and the other end of the second conductive member 600b is connected to the first polarity terminal 501 of the fourth battery assembly 500 d.

One end of the second conductive member 600b may be connected to the first polarity terminal 501 of the second battery pack 500b, and the other end of the second conductive member 600b may be connected to the second polarity terminal 502 of the fourth battery pack 500 d. Both ends of the second conductive member 600b may be simultaneously connected to the first polarity terminals 501 of the second battery assembly 500b and the fourth battery assembly 500d, and both ends of the second conductive member 600b may be simultaneously connected to the second polarity terminals 502 of the second battery assembly 500b and the fourth battery assembly 500 d.

In one embodiment, in order to facilitate the connection of the conductive member to two adjacent battery assemblies located on the same side of the partition beam 300, the first polarity terminal 501 of one battery assembly is disposed adjacent to the second polarity terminal 502 of the other battery assembly. The length of the conductive piece can be reduced in such a mode, and the cost is reduced.

In one embodiment, the inside of the battery pack case 400 is provided with a first BDU700a and a second BDU700b, the first BDU700a and the second BDU700b are respectively located at both sides of the partition beam 300; the battery pack is provided with a first polarity total output end 510 and a second polarity total output end 520, the polarity of the second polarity total output end 520 is opposite to that of the first polarity total output end 510, the first polarity total output end 510 and the first BDU700a are positioned on the same side of the separation beam 300, and the second polarity total output end 520 and the second BDU700b are positioned on the same side of the separation beam 300; the first BDU700a is connected to the first polarity total output 510 and the second BDU700b is connected to the second polarity total output 520.

A BDU (battery disconnection unit) is an essential electrical component in a battery pack. In this embodiment, a split BDU is adopted, that is, the first BDU700a and the second BDU700b are separately disposed, the first polar total output end 510 and the first BDU700a are located on one side of the separation beam 300, and the second polar total output end 520 and the second BDU700b are located on the other side of the separation beam 300, so that the first polar total output end 510 can be directly connected with the first BDU700a, and the second polar total output end 520 can be directly connected with the second BDU700b, which can simplify the complexity of the connection structure between the total output end and the BDUs, avoid the heat generating components from being concentrated in the middle position of the battery pack, avoid thermal runaway, and simultaneously save space to arrange other structures.

It is noted that, for clarity, the first polarity total output end 510 and the second polarity total output end 520 are schematically illustrated in fig. 3, and the structure of the first polarity total output end 510 and the second polarity total output end 520 is not limited thereto.

It should be understood that the plurality of batteries in the battery assembly are connected with each other, and specifically, the plurality of batteries may be connected in series, may be connected in parallel, or may be connected in series in a part and in parallel in another part. The first polarity total output terminal 510 and the second polarity total output terminal 520 refer to two total output terminals formed by connecting a plurality of battery modules and used for external connection. It is noted that the polarity of the first polarity total output terminal 510 is opposite to that of the second polarity total output terminal 520, when the first polarity total output terminal 510 is positive, the second polarity total output terminal 520 is negative, otherwise, when the first polarity total output terminal 510 is negative, the second polarity total output terminal 520 is positive.

Illustratively, referring to fig. 3, a first battery assembly 500a, a third battery assembly 500c, a fourth battery assembly 500d and a second battery assembly 500b are connected in series in sequence, wherein a first polarity terminal 501 of the second battery assembly 500b is used as a first polarity total output terminal 510, and a second polarity terminal 502 of the first battery assembly 500a is used as a second polarity total output terminal 520.

In one embodiment, the battery pack case 400 has opposing first and second ends, with the first BDU700a and the second BDU700b each located at the first end of the battery pack case 400; a plurality of battery assemblies are disposed on both sides of the partition beam 300, wherein two battery assemblies, which are close to the second end of the battery pack case 400 and located on both sides of the partition beam 300, are connected by the second bus bar 200.

Referring to fig. 3, two battery assemblies are provided on both sides of the partition beam 300, wherein a third battery assembly 500c and a fourth battery assembly 500d are connected by a second bus bar 200.

In one embodiment, the first and second polarity leads 501 and 502 of the battery assembly are disposed along a diagonal of the battery assembly. In this way, it is ensured that the length of the second bus bar 200 is shortest, and the first polarity lead-out terminal 501 and the second polarity lead-out terminal 502, which need to be connected through the conductive member, of two adjacent battery modules located on the same side of the partition beam 300 are both located on the side of the battery modules away from the first bus bar 100, so that the cost can be reduced, and the risk of thermal runaway caused by heat concentration can be reduced.

In one embodiment, the number of cells is an odd number.

The number of the batteries in each battery pack is odd, so that the arrangement of the first polarity leading-out end 501 and the second polarity leading-out end 502 of each battery pack along the diagonal line of each battery pack can be ensured, and the overall layout of the battery pack is reasonable and compact.

The number of cells in the plurality of cell assemblies may be the same or different.

In one embodiment, referring to fig. 4 and 5, a first charge and discharge interface 410 and a second charge and discharge interface 420 are respectively disposed at two ends of a battery pack case 400; the first bus bar 100 includes a first sub bus bar 101 and a second sub bus bar 102, the first sub bus bar 101 is connected between a first terminal of the first charge-discharge interface 410 and a first terminal of the second charge-discharge interface 420; the second sub bus bar 102 is connected between the second terminal of the first charge and discharge interface 410 and the second terminal of the second charge and discharge interface 420.

By connecting the first sub-bus bar 101 between the first terminal of the first charge-discharge interface 410 and the first terminal of the second charge-discharge interface 420 and connecting the second sub-bus bar 102 between the second terminal of the first charge-discharge interface 410 and the second terminal of the second charge-discharge interface 420, the first charge-discharge interface 410 and the second charge-discharge interface 420 at the two ends of the battery pack case 400 can be ensured to supply power for the front drive and the rear drive of the electric vehicle respectively.

The first end of battery package box 400 is provided with first installing port, and the second end of battery package box 400 is provided with the second installing port, and first charge-discharge interface 410 sets up in first installing port, and second charge-discharge interface 420 is located the second installing port.

The first charge and discharge interface 410 may be connected to the first BDU700a or the second BDU700 b.

The first terminal of the first charge-discharge interface 410 and the first terminal of the second charge-discharge interface 420 have the same polarity, and the second terminal of the first charge-discharge interface 410 and the second terminal of the second charge-discharge interface 420 have the same polarity, where the polarity of the first terminal is opposite to the polarity of the second terminal. Illustratively, the first terminal is a positive terminal and the second terminal is a negative terminal.

In some embodiments, referring to fig. 4 and 5, the second sub bus bar 102 is spaced apart from the first sub bus bar 101 in the height direction of the battery pack. By adopting the mode, the utilization rate of the internal space of the battery pack can be improved, the second sub-bus bar 102 is prevented from being contacted with the first sub-bus bar 101, and the safety is improved.

Referring to fig. 6, the first sub bus bar 101 and the second sub bus bar 102 are both located in the escape space 210.

In some embodiments, the plate surface of the first sub bus bar 101 and the plate surface of the second sub bus bar 102 are perpendicular to the height direction of the battery pack.

The first sub-bus 101 and the second sub-bus 102 are both in a strip plate-shaped structure, taking the first sub-bus 101 as an example, the length of the first sub-bus 101 is much longer than the width of the first sub-bus 101, the first sub-bus 101 has two opposite plate surfaces and a thickness surface surrounding the plate surfaces, and the plate surfaces refer to the large surface of the first sub-bus 101, that is, the surface with the largest area of the first sub-bus 101. The thickness of the first sub bus 101 is smaller than the width of the first sub bus 101. In this embodiment, the plate surface of the first sub-bus bar 101 and the plate surface of the second sub-bus bar 102 are both perpendicular to the height direction of the battery pack, that is, it is the thickness surface of the first sub-bus bar 101 and the second sub-bus bar 102 that actually occupies the space in the height direction of the battery pack, because the thickness of the first sub-bus bar 101 is smaller than the width of the first sub-bus bar 101, and the thickness of the second sub-bus bar 102 is smaller than the width of the second sub-bus bar 102, the occupation of the space in the height direction can be reduced on the basis of fully utilizing the internal space of the battery pack. When the battery pack provided by the embodiment is applied to an electric automobile, the space of the whole automobile can be released.

For example, when the battery pack provided by the present embodiment is installed inside an electric vehicle, the first charge and discharge interface 410 is close to the front end of the electric vehicle, and the second charge and discharge interface 420 is close to the rear end of the electric vehicle.

It should be noted that the first bus bar 100, the second bus bar 200, and the conductive member may be copper bars.

In one embodiment, the battery pack further includes an insulating holder connected to the first and second bus bars 100 and 200.

Through setting up insulating support, can fix and insulate first busbar 100 and second busbar 200, prevent to shake or rub between first busbar 100 and the second busbar 200, improved the security of battery package.

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 that have been 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:

the battery pack comprises a separation beam (300), wherein at least one battery pack is arranged on each of two sides of the separation beam (300);

a first busbar (100), the first busbar (100) being disposed on the partition beam (300);

the second bus bar (200) is used for connecting the two battery assemblies positioned on two sides of the separation beam (300), and at least part of the second bus bar (200) and the first bus bar (100) are arranged at intervals along the height direction of the battery pack.

2. The battery pack according to claim 1, wherein the number of the battery components is plural, and two adjacent battery components located on the same side of the partition beam (300) are connected by a conductive member located on a side of the battery components remote from the first bus bar (100).

3. The battery pack of claim 2, wherein the first polarity outlet (501) of one of the adjacent battery assemblies is disposed adjacent to the second polarity outlet (502) of the other battery assembly.

4. The battery pack according to claim 1, wherein the second busbar (200) has an escape space (210), and at least a portion of the first busbar (100) is located within the escape space (210).

5. The battery pack according to claim 1, further comprising a battery pack case (400), wherein a first BDU (700a) and a second BDU (700b) are disposed inside the battery pack case (400), and the first BDU (700a) and the second BDU (700b) are respectively located at both sides of the partition beam (300); the battery pack is provided with a first polarity total output end (510) and a second polarity total output end (520), the polarity of the second polarity total output end (520) is opposite to that of the first polarity total output end (510), the first polarity total output end (510) and the first BDU (700a) are positioned on the same side of the separation beam (300), and the second polarity total output end (520) and the second BDU (700b) are positioned on the same side of the separation beam (300);

the first BDU (700a) is connected to the first polarity master output (510) and the second BDU (700b) is connected to the second polarity master output (520).

6. The battery pack of claim 5, wherein the battery pack case (400) has first and second opposing ends, the first BDU (700a) and the second BDU (700b) each being located at the first end of the battery pack case (400); the two sides of the separating beam (300) are provided with a plurality of battery components, wherein the two battery components which are close to the second end of the battery pack box body (400) and located on the two sides of the separating beam (300) are connected through the second bus bar (200).

7. The battery pack according to claim 1, further comprising a battery pack case (400), wherein a first charge-discharge interface (410) and a second charge-discharge interface (420) are respectively disposed at two ends of the battery pack case (400); the first bus (100) comprises a first sub-bus (101) and a second sub-bus (102), the first sub-bus (101) being connected between a first terminal of the first charge-discharge interface (410) and a first terminal of the second charge-discharge interface (420); the second sub bus bar (102) is connected between the second terminal of the first charge-discharge interface (410) and the second terminal of the second charge-discharge interface (420).

8. The battery pack according to any one of claims 1 to 7, wherein the battery assembly includes a plurality of batteries, which are stacked in a length direction of the partition beam (300).

9. The battery pack of claim 8, wherein the number of cells is an odd number.

10. The battery pack according to any one of claims 1 to 7, wherein the first and second polarity leads (501, 502) of the battery assembly are disposed along a diagonal of the battery assembly.

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