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 the technical field of batteries, in particular to a battery pack.

Background technique

In the related art, when the discharge socket of the battery pack and the relay are placed in the front and rear positions of the battery pack, the two need to be electrically connected through a long bus bar, and the copper bar generates a large amount of heat and needs to be placed on the middle beam, but When the battery components disposed on both sides of the beam are connected by conductive bars, the conductive bars are likely to interfere with the middle bus bars, resulting in short circuits and safety risks.

Utility model content

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

To achieve the above object, the utility model provides the following technical solutions:

The utility model provides a battery pack, comprising:

a separation beam, at least one battery assembly is provided on both sides of the separation beam;

a first bus bar, the first bus bar is arranged on the separation beam;

A second bus bar that connects the two battery assemblies located on both sides of the partition beam, and at least a part of the second bus bar and the first bus bar along the battery pack Height direction interval setting.

In the battery pack provided by the present invention, since at least part of the second busbar and the first busbar are arranged at intervals along the height direction of the battery pack, interference between the second busbar and the first busbar arranged on the separating beam can be avoided. , thereby improving the safety of the battery pack.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments shown in the following figures. 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. Additionally, the relevant elements or components may be arranged differently as known in the art. Furthermore, in the drawings, the same reference numerals refer to the same or similar parts throughout the various figures. in:

FIG. 1 is a schematic structural diagram of a battery pack provided in this embodiment;

2 is a schematic structural diagram of a second bus bar in this embodiment;

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

FIG. 4 is a schematic partial structure diagram of another modification of the battery pack provided in this embodiment;

Fig. 5 is the partial enlarged view of M place in Fig. 4;

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

The reference numerals are explained as follows:

100, the first bus bar; 101, the first sub bus bar; 102, the second sub bus bar; 200, the second bus bar; 201, the first connecting section; 202, the first vertical section; 203, the horizontal section; 204, second vertical section; 205, second connection section; 210, avoidance space; 300, partition beam; 400, battery pack box; 401, bottom plate; 402, frame; 403, first accommodation space; 404, first 2. accommodating space; 410, the first charging and discharging interface; 420, the second charging and discharging interface; 500a, the first battery assembly; 500b, the second battery assembly; 500c, the third battery assembly; 500d, the fourth battery assembly; 501, 502, the second polarity terminal; 510, the first polarity total output terminal; 520, the second polarity total output terminal; 600a, the first conductive member; 600b, the second conductive member; 700a, the first BDU; 700b, the second BDU.

Detailed ways

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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 may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "plurality" is a 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/said" or "an" object is also intended to mean one of the possible plurality of such objects.

Unless otherwise specified or stated, the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection, or a signal connection. Connection; "connection" can be directly connected or indirectly connected through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

Further, in the description of the present disclosure, it should be understood that the directional terms "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are from the angles shown in the drawings. described, 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 connected "on", "under", or "inside" or "outside" another element(s), it can not only be directly connected "On", "under" or "inside", "outside" another element(s), or indirectly connected "on", "under" or "outside" another element(s) through intervening elements inside and outside".

Referring to FIGS. 1 to 6 , the present embodiment provides a battery pack including a separation beam 300 , a first bus bar 100 and a second bus bar 200 , and at least one battery assembly is provided on both sides of the separation beam 300 ; The first bus bar 100 is disposed on the separating beam 300; the second bus bar 200 connects the two battery assemblies located on both sides of the separating beam 300, and at least part of the second bus bar 200 and the first bus bar 100 are along the height of the battery pack Orientation interval setting.

In the battery pack provided in this embodiment, since at least part of the second bus bar 200 and the first bus bar 100 are spaced apart in the height direction of the battery pack, the second bus bar 200 and the first bus bar 200 disposed on the separating beam 300 can be avoided. The bus bar 100 interferes, thereby improving the safety of the battery pack.

In some embodiments, the battery pack further includes a battery pack box 400 , a battery accommodating space is formed inside the battery pack box 400 , the battery pack box 400 includes a bottom plate 401 and a frame 402 , and the frame 402 is disposed around the outer periphery of the bottom plate 401 , the separating beam 300 is arranged in the frame 402 to separate the battery accommodating space. The height direction of the battery pack refers to the direction perpendicular to the bottom plate 401 , and the arrow direction Z in FIG. 1 represents the height direction of the battery pack.

It should be understood that, in this embodiment, at least a 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, which means that at least a part of the second bus bar 200 and the first bus bar 100 are located at a distance from each other. There is no direct contact in the height direction of the battery pack. Specifically, there may be a gap between at least part of the second bus bar 200 and the first bus bar 100 in the height direction of the battery pack, or there may be a gap in the height direction of the first bus bar 100 . At least part of the outer surface of the second bus bar 200 is provided with an insulating layer, the insulating layer is located in the above-mentioned 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. Wherein, at least part of the second bus bar 200 refers to a portion of the second bus bar 200 that overlaps with the projection of the first bus bar 100 on the bottom plate 401 .

Exemplarily, the partition beam 300 is located in the middle of the battery pack box 400 to separate the battery accommodating space into a first accommodating space 403 and a second accommodating space 404. The first accommodating space 403 is provided with at least one battery assembly, the first accommodating space At least one battery assembly is disposed in the second accommodating space 404 .

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

Each battery assembly has a first polarity terminal 501 and a second polarity terminal 502, and the polarity of the first polarity terminal 501 is opposite to that of the second polarity terminal 502, for example, the first polarity terminal The polarity lead end 501 is the positive lead end, and the second polarity lead end 502 is the negative lead end. The polarities of the first polarity terminal 501 and the second polarity terminal 502 may be interchanged.

When the second bus bar 200 connects two battery assemblies located on both sides of the separation beam 300 , it can connect the first polarity lead end 501 of one battery assembly and the second polarity lead end 502 of the other battery assembly.

It should be noted that, the second bus bar 200 can also be connected to the first polarity lead ends 501 of the two battery assemblies at the same time, and can also be connected to the second polarity lead ends 502 of the two battery assemblies at the same time.

Referring to FIG. 1 , a battery assembly is arranged in the first accommodating space 403 , named as a first battery assembly 500 a ; a battery assembly is arranged in the second accommodating space 404 , which is named as a second battery assembly 500 b .

In one embodiment, the second bus bar 200 has an escape space 210 , and at least part of the first bus bar 100 is located in the escape space 210 .

Exemplarily, as shown in FIG. 1 and FIG. 2 , the second bus bar 200 is bent in a direction close to the partition beam 300 to form an escape space 210 , and at least part 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 disposed away from the separation beam 300 . Specifically, as shown in FIG. 2 , the second bus bar 200 includes a first connecting section 201 , a first vertical section 202 , a transverse section 203 , a second vertical section 204 and a second connecting section 205 which are integrally formed. The first connecting segment 201 is connected to the first polarity lead end 501 of the first battery assembly 500a, the second connecting segment 205 is connected to the second polarity lead end 502 of the second battery pack, the first vertical segment 202, the horizontal segment 203 and the second vertical section 204 form an avoidance space 210, and the lateral section 203 is located between the first bus bar 100 and the separating beam 300, that is, the lateral section 203 and the first bus bar 100 are arranged at intervals along the height direction of the battery pack . Such an approach can not only avoid interference between the second busbar 200 and the first busbar 100 , but also fully utilize the space between the first busbar 100 and the partition beam 300 , thereby improving the internal space utilization of the battery pack.

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

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

It should be noted that the battery may also be a cylindrical battery.

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

Since the conductive member and the first bus bar 100 generate heat, arranging the conductive member on the side of the battery assembly away from the first bus bar 100 can effectively prevent heat from being concentrated in the middle of the battery pack and avoid thermal runaway.

Exemplarily, as shown in FIG. 3 , two battery assemblies are disposed on both sides of the partition beam 300 , that is, there are two battery assemblies in the first accommodating space 403 , which are named as the first battery assembly 500 a and the first battery assembly 500 a respectively. Three battery assemblies 500c; there are two battery assemblies in the second accommodating space 404, which are respectively named as the second battery assembly 500b and the fourth battery assembly 500d. The first battery assembly 500a and the second battery assembly 500b are disposed on both sides of the separation beam 300 opposite to each other, and the third battery assembly 500c and the fourth battery assembly 500d are oppositely disposed on both sides of the separation beam 300 .

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

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

It should be noted that one end of the first conductive member 600a can also be connected to the second polarity lead-out end 502 of the first battery assembly 500a, and the other end of the first conductive member 600a can also be connected to the first pole of the third battery assembly 500c The sex terminal 501 is connected. The two ends of the first conductive member 600a can also be connected to the first polarity lead-out ends 501 of the first battery assembly 500a and the third battery assembly 500c at the same time, and the two ends of the first conductive member 600a can also be connected to the first battery assembly 500a and the third battery assembly 500c at the same time. The second polarity terminal 502 of the third battery assembly 500c.

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

It should be noted that one end of the second conductive member 600b can also be connected to the first polarity lead-out end 501 of the second battery assembly 500b, and the other end of the second conductive member 600b can also be connected to the second pole of the fourth battery assembly 500d The sex terminal 502 is connected. The two ends of the second conductive member 600b can also be connected to the first polarity lead-out ends 501 of the second battery assembly 500b and the fourth battery assembly 500d at the same time, and the two ends of the second conductive member 600b can also be simultaneously connected to the second battery assembly 500b and The second polarity terminal 502 of the fourth battery assembly 500d.

In one embodiment, in order to facilitate the connection of the conductive member with two adjacent battery assemblies located on the same side of the separation beam 300, in the two adjacent battery assemblies, the first polarity lead-out end 501 of one battery assembly is connected to the other battery assembly. The second polarity lead-out ends 502 of one battery assembly are disposed adjacent to each other. In this way, the length of the conductive member can be reduced and the cost can be reduced.

In one embodiment, 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 located on two sides of the separation beam 300 respectively; the battery pack has a first polarity total output end 510 and the second polarity total output terminal 520, the second polarity total output terminal 520 is opposite to the first polarity total output terminal 510, and the first polarity total output terminal 510 and the first BDU 700a are located on the same side of the separation beam 300 , the second polarity total output terminal 520 and the second BDU 700b are located on the same side of the separation beam 300 ;

BDU (battery disconnect unit, battery pack disconnect unit) is a necessary electrical component in the battery pack. This embodiment adopts a split BDU, that is, the first BDU 700a and the second BDU 700b are arranged separately, and the first polarity total output end 510 and the first BDU 700a are located on one side of the separation beam 300, and the second polarity total output end 520 The second BDU 700b is located on the other side of the separation beam 300, so that the first polarity total output terminal 510 can be directly connected to the first BDU 700a, and the second polarity total output terminal 520 can be directly connected to the second BDU 700b, which can simplify the total output The complexity of the connection structure between the terminal and the BDU prevents the heat-generating components from being concentrated in the middle of the battery pack and avoids thermal runaway. At the same time, it can save space for arranging other structures.

It should be noted that, in order to clearly illustrate the first polarity total output terminal 510 and the second polarity total output terminal 520, the first polarity total output terminal 510 and the second polarity total output terminal 520 in FIG. Schematic identification, of course, the structures of the first polarity total output terminal 510 and the second polarity total output terminal 520 are not limited to this.

It should be understood that the plurality of batteries in the battery assembly are connected to each other. Specifically, the plurality of batteries may be connected in series, may be connected in parallel, or may be partly connected in series and partly connected in parallel. The first-polarity total output terminal 510 and the second-polarity total output terminal 520 refer to two total output terminals formed after connecting a plurality of battery assemblies and used for external connection. It is worth noting that the polarities of the first-polarity total output terminal 510 and the second-polarity total output terminal 520 are opposite. When the first-polarity total output terminal 510 is positive, the second-polarity total output terminal 520 is Negative polarity, on the contrary, when the first polarity total output terminal 510 is negative polarity, the second polarity total output terminal 520 is positive polarity.

Exemplarily, as shown in FIG. 3 , the first battery assembly 500a, the third battery assembly 500c, the fourth battery assembly 500d and the second battery assembly 500b are connected in series in sequence, wherein the first polarity lead-out end of the second battery assembly 500b 501 is used as the first polarity total output terminal 510 , and the second polarity lead terminal 502 of the first battery assembly 500 a is used as the second polarity total output terminal 520 .

In one embodiment, the battery pack box 400 has opposite first ends and second ends, the first BDU 700a and the second BDU 700b are both located at the first end of the battery pack box 400 ; both sides of the partition beam 300 are provided with A plurality of battery assemblies, wherein two battery assemblies located near the second end of the battery pack box 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 disposed on both sides of the partition beam 300 , wherein the third battery assembly 500 c and the fourth battery assembly 500 d are connected through the second bus bar 200 .

In one embodiment, the first polarity terminal 501 and the second polarity terminal 502 of the battery assembly are disposed along the diagonal of the battery assembly. This method can not only ensure the shortest length of the second bus bar 200 , but also ensure that the first polarity lead-out end 501 and the second adjacent battery assemblies located on the same side of the separation beam 300 need to be connected by a conductive member. The polar lead terminals 502 are all located on the side of the battery assembly away from the first bus bar 100 , so as to reduce the cost and reduce the risk of thermal runaway caused by heat concentration.

In one embodiment, the number of batteries is odd.

The number of batteries in each battery assembly is an odd number, which can ensure that the first polarity terminal 501 and the second polarity terminal 502 of the battery assembly are arranged along the diagonal of the battery assembly, and the overall layout of the battery pack is reasonable and compact.

The number of batteries in the plurality of battery assemblies may be the same or different.

In one embodiment, as shown in FIG. 4 and FIG. 5 , both ends of the battery pack case 400 are respectively provided with a first charging and discharging interface 410 and a second charging and discharging interface 420 ; the first bus bar 100 includes a first sub-bus row 101 and second sub-bus bar 102, the first sub-bus bar 101 is connected between the first terminal of the first charging and discharging interface 410 and the first terminal of the second charging and discharging interface 420; the second sub-bus bar 102 is connected to between the second terminal of the first charging and discharging interface 410 and the second terminal of the second charging and discharging interface 420 .

By connecting the first sub-bus bar 101 between the first terminal of the first charging and discharging interface 410 and the first terminal of the second charging and discharging interface 420 , the second sub-bus bar 102 is connected to the first terminal of the first charging and discharging interface 410 . Between the second terminal and the second terminal of the second charge-discharge interface 420, it can ensure that the first charge-discharge interface 410 and the second charge-discharge interface 420 at both ends of the battery pack box 400 can supply power to the front-drive and rear-drive of the electric vehicle, respectively .

The first end of the battery pack case 400 is provided with a first installation port, the second end of the battery pack case 400 is provided with a second installation port, the first charging and discharging interface 410 is provided at the first mounting port, and the second charging and discharging interface 420 is located at the second mounting port.

It should be noted that, the first charging and discharging interface 410 may be connected to the first BDU 700a, and may also be connected to the second BDU 700b.

It should be noted that the polarities of the first terminal of the first charging and discharging interface 410 and the first terminal of the second charging and discharging interface 420 are the same, and the second terminal of the first charging and discharging interface 410 and the first terminal of the second charging and discharging interface 420 The polarities of the two terminals are the same, wherein the polarity of the first terminal is opposite to that of the second terminal. Exemplarily, the first terminal is a positive terminal, and the second terminal is a negative terminal.

In some embodiments, as shown in FIG. 4 and FIG. 5 , the second sub-bus bar 102 and the first sub-bus bar 101 are arranged at intervals along the height direction of the battery pack. In this way, the utilization rate of the internal space of the battery pack can be improved, the contact between the second sub-bus bar 102 and the first sub-bus bar 101 can be avoided, and the safety can be improved.

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

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

Both the first sub-bus bar 101 and the second sub-bus bar 102 are in the shape of a long strip. Taking the first sub-bus bar 101 as an example, the length of the first sub-bus bar 101 is much larger than the width of the first sub-bus bar 101 , the first sub-bus bar 101 has two opposite plate surfaces and a thickness surface arranged around the plate surface, the plate surface refers to the large surface of the first sub-bus bar 101 , that is, the surface with the largest area of the first sub-bus bar 101 . Wherein, the thickness of the first sub-bus bar 101 is smaller than the width of the first sub-bus bar 101 . In this embodiment, the board surface of the first sub-bus bar 101 and the board surface of the second sub-bus bar 102 are both perpendicular to the height direction of the battery pack, that is to say, the first sub-bus bar actually occupies the space in the height direction of the battery pack. Regarding the thickness of the row 101 and the second sub-bus bar 102, since the thickness of the first sub-bus bar 101 is smaller than the width of the first sub-bus bar 101, the thickness of the second sub-bus bar 102 is smaller than the width of the second sub-bus bar 102, Therefore, the space occupied in the height direction can be reduced on the basis of making full use of the internal space of the battery pack. When the battery pack provided in this embodiment is applied to an electric vehicle, the space of the entire vehicle can be released.

Exemplarily, when the battery pack provided in this embodiment is installed inside an electric vehicle, the first charging and discharging interface 410 is close to the front end of the electric vehicle, and the second charging and discharging 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 can all be copper bars.

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

By arranging the insulating bracket, the first bus bar 100 and the second bus bar 200 can be fixed and insulated to prevent vibration or friction between the first bus bar 100 and the second bus bar 200, thereby improving the safety of the battery pack.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the inventive creations disclosed herein. This disclosure is intended to cover any modifications, uses, or adaptations of the present invention that follow the general principles of this disclosure and include common knowledge or practice in the art not disclosed by this disclosure means. The specification and example embodiments are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of protection 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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