CN221379509U

CN221379509U - Battery pack

Info

Publication number: CN221379509U
Application number: CN202323195036.3U
Authority: CN
Inventors: 曲凡多; 王赛
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-11-24
Filing date: 2023-11-24
Publication date: 2024-07-19
Anticipated expiration: 2033-11-24

Abstract

The utility model discloses a battery pack, which comprises: the battery pack comprises a mounting frame, a battery pack and a battery pack, wherein the mounting frame comprises a side surrounding plate part and a partition plate part, the partition plate part is positioned in the side surrounding plate part, and mounting spaces are respectively formed on two sides of the partition plate part by the side surrounding plate part and are used for mounting battery cells; the cooling device comprises a partition plate part, a cooling flow passage is formed in the partition plate part, the end part of the partition plate part penetrates through the side wall plate part and extends out of the side wall plate part, and a cooling joint communicated with the cooling flow passage is arranged at the end part of the partition plate part. According to the battery pack disclosed by the embodiment of the utility model, the middle partition plate provided with the cooling flow channel and the side wall plate part are integrated into a whole, so that the battery pack can save other fixed supporting structural members and occupied space thereof while cooling the battery cells.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

The power battery is a core component of a new energy automobile and is also an important direction of energy transformation in the future. The device is mainly different from a starting battery for starting an automobile engine, and a valve port sealed lead-acid storage battery, an open tubular lead-acid storage battery and a lithium iron phosphate storage battery are adopted.

The current power battery is generally arranged in a single layer by the electric core or the module, and the double-layer arrangement is adopted to construct complex structures such as a bracket and the like, so that the occupied space is increased.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery pack, in which a middle partition plate provided with a cooling flow channel and a side wall plate part are integrated into a whole, so that the battery pack can save other fixing support structural members and occupied space thereof while cooling a battery cell.

According to an embodiment of the present utility model, a battery pack includes: the battery pack comprises a mounting frame, a battery pack and a battery pack, wherein the mounting frame comprises a side surrounding plate part and a partition plate part, the partition plate part is positioned in the side surrounding plate part, and mounting spaces are respectively formed on two sides of the partition plate part by the side surrounding plate part and are used for mounting battery cells; the cooling device comprises a partition plate part, a cooling flow passage is formed in the partition plate part, the end part of the partition plate part penetrates through the side wall plate part and extends out of the side wall plate part, and a cooling joint communicated with the cooling flow passage is arranged at the end part of the partition plate part.

According to the battery pack disclosed by the embodiment of the utility model, the side wall plate part and the partition plate part of the battery pack are integrated into a whole, the partition plate part divides the mounting frame into two mounting spaces, each mounting space is used for mounting the battery cells, the cooling flow passage is arranged in the partition plate part and used for cooling the battery cells in the two mounting spaces, so that the battery cells in the two mounting spaces are cooled, other fixed supporting structural members for fixedly supporting the cooling plate are saved while the battery cells in the two mounting spaces are cooled, and meanwhile, the space can be saved by sharing one partition plate part.

According to the battery pack disclosed by the embodiment of the utility model, the side wall plate part comprises two first side plates which are distributed oppositely, the middle parts of the side surfaces of the two first side plates facing each other are respectively provided with the connecting convex strips parallel to the partition plate part, and the two ends of the partition plate are fixedly connected with the connecting convex strips.

The battery pack according to the embodiment of the utility model further comprises a first cover plate and a second cover plate, wherein the side wall plate part is opened at two sides of the partition plate part, and the first cover plate and the second cover plate are used for respectively closing two sides of the side wall plate part; the first side plates are respectively provided with mounting raised lines on two sides of the connecting raised lines, and the two mounting raised lines are respectively connected with the first cover plate and the second cover plate.

According to the battery pack provided by the embodiment of the utility model, the side wall plate part further comprises a second side plate, the second side plate is connected between the end parts of the two first side plates, the second side plate comprises two sub side plates, and the end parts of the sub side plates are respectively connected with the mounting raised strips and the connecting raised strips.

According to the battery pack provided by the embodiment of the utility model, the two sub-side plates are spaced apart and form the mounting gap, and the end part of the partition plate part extends out of the side wall plate part through the mounting gap.

According to the battery pack provided by the embodiment of the utility model, the upper side and the lower side of the end part of each sub-side plate are respectively provided with the avoidance opening, and the avoidance openings are used for avoiding the installation raised strips and the connection raised strips which are connected with the sub-side plates.

According to the battery pack disclosed by the embodiment of the utility model, the partition plate part comprises the current collector and the main plate body, the current collectors are connected to two ends of the main plate body, the main plate body is positioned in the side wall plate part, and the current collectors extend out of the side wall plate part and are provided with the cooling joints.

According to the battery pack provided by the embodiment of the utility model, the thickness of the current collector is larger than that of the main board body.

According to the battery pack of the embodiment of the utility model, the cooling joint is provided at a middle position of the current collector in the width direction of the separator portion.

According to the battery pack provided by the embodiment of the utility model, the side wall plate part and the partition plate part are extrusion molding parts.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a schematic view showing the overall structure of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of an internally mounted cell of a battery pack according to an embodiment of the present utility model;

fig. 3 is an exploded view of a frame of a battery pack according to an embodiment of the present utility model;

FIG. 4 is a partial schematic view of a first side panel of a battery pack according to an embodiment of the utility model;

fig. 5 is a perspective view of the bottom view of a battery pack according to an embodiment of the present utility model;

Fig. 6 is a side view of a battery pack according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of the battery pack of the embodiment of the present utility model taken along the A-A direction of FIG. 6;

Fig. 8 is another angular side view of a battery pack according to an embodiment of the present utility model.

Reference numerals:

The battery pack 100 is provided with a battery pack,

The separator 1, the current collector 11, the cooling joint 111, the main plate body 12,

Side wall plate portion 2, second side plate 21, sub side plate 211, escape opening 212, first side plate 22, connecting bead 221, mounting bead 222, reinforcing connecting portion 223, inclined transition portion 224, connecting portion 225,

The battery cell 3, the first apron 4, the second apron 5.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The following describes a battery pack 100 according to an embodiment of the present utility model with reference to fig. 1 to 8, in which a middle partition plate portion 1 provided with a cooling flow channel and a side wall plate portion 2 are integrally provided as a single body, so as to save other fixing support structural members and the occupied space thereof while satisfying the cooling of the battery cells 3.

As shown in fig. 1 to 8, a battery pack 100 according to an embodiment of the present utility model includes: the installation frame comprises a side coaming part 2 and a partition plate part 1, wherein the partition plate part 1 is positioned in the side coaming part 2, and the two sides of the partition plate part 1 are respectively provided with an installation space for installing the battery cell 3.

In practice, the partition plate portion 1 and the side wall plate portion 2 may be integrally formed during design, or the partition plate portion 1 and the side wall plate portion 2 may be welded together, and by connecting the partition plate portion 1 with the side wall plate portion 2, the partition plate portion 1 divides the side wall plate portion 2 into two different installation spaces, and when the battery cell 3 is actually installed in each installation space, the placement direction of the battery cell 3 is the same.

Specifically, the partition plate portion 1 may be disposed at a middle position of the side wall plate portion 2 in the height direction of fig. 1 and 2, and the partition plate portion 1 may divide the side wall plate portion 2 into two installation spaces of the same size. Of course, the partition plate portion 1 may be disposed at other positions along the height direction of fig. 1 and 2, so that the side wall plate portion 2 is divided into two mounting spaces with different sizes, and the different mounting spaces can be used for placing different numbers of the battery cells 3. The electric core 3 in each installation space is equivalent to a battery pack 100, the electric core 3 in two installation spaces is separated to be equivalent to two battery packs of traditional mode, but compare two battery packs of traditional mode, divide into two installation spaces with side wall plate portion 2 through a baffle portion 1 and place electric core 3, more save space, the integrated level is high.

Further, the electric cores 3 in different installation spaces are respectively adhered to the partition plate parts 1, the adhesive can be a heat-conducting structural adhesive with a heat-conducting function, the assembly of the upper electric core 3 is easy to realize, the assembly of the lower electric core 3 can be realized by adopting a mode of overturning the whole structure after the assembly, the electric cores 3 can be stacked at first, the upper surface of a battery module formed by the electric cores 3 is coated with the adhesive, and finally the whole structure is directly covered on the upper surface.

Wherein, a cooling flow passage is formed in the partition plate part 1, the end part of the partition plate part 1 penetrates through the side wall plate part 2 and extends out of the side wall plate part 2, and the end part of the partition plate part 1 is provided with a cooling joint 111 communicated with the cooling flow passage.

That is, the partition plate portion 1 not only divides the side wall plate portion 2 into two installation spaces, but also the cooling flow channels provided by the partition plate portion 1 can cool the battery cells 3 in the two installation spaces, that is, the battery cells 3 in the two installation spaces share a cooling structure, so that the battery cells 3 in the respective installation spaces can be effectively cooled, and further the safety of the operation of the battery pack 100 is ensured, the end portion of the partition plate portion 1 penetrates through the side wall plate and extends out of the side wall plate portion 2, and the end portion of the partition plate portion 1 is provided with the cooling joint 111, and the cooling source is connected through the cooling joint 111 and is installed in the partition plate portion 1 to cool the battery cells 3 in the battery pack 100, so that the safety of the battery pack 100 is ensured. The cooling joint 111 is arranged outside the side wall plate part 2, so that cooling liquid can be conveniently injected, leakage at 225 positions of connecting parts of different parts can be reduced, the internal use safety is affected, and the short circuit risk is reduced.

Therefore, in the battery pack 100 of the embodiment of the utility model, the partition plate part 1 and the side wall plate part 2 are integrally arranged, so that the arrangement of the connecting piece and the fixed supporting structure of the cooling plate and the battery pack frame in the prior art is reduced, the space can be saved while the cooling of the battery core 3 is satisfied, and the simple upper and lower double-layer structure of the battery module is realized.

In some embodiments, the side wall board 2 includes two oppositely-distributed first side boards 22, and connecting raised strips 221 parallel to the partition board 1 are respectively arranged at middle positions of the side faces of the two first side boards 22 facing each other, and two ends of the partition board 1 are fixedly connected to the connecting raised strips 221.

In practice, the connecting ribs 221 are provided to extend along the longitudinal direction of the first side plates 22, the positions of the connecting ribs 221 of the two first side plates 22 correspond to each other, the separator portion 1 and the first side plates 22 are welded integrally to the connecting ribs 221, and the connecting ribs 221 and the body of the first side plates 22 are integrally formed.

Further, the connection protruding strip 221 sequentially comprises a reinforced connection portion 223, an inclined transition portion 224 and a connection portion 225 from one side of the body close to the first side plate 22 to one side close to the partition plate portion 1, wherein the reinforced connection portion 223 is connected with the body of the first side plate 22, the thickness of the reinforced connection portion 223 is larger than that of the connection portion 225, the inclined transition portion 224 presents a trapezoid structure, one end of the inclined transition portion 224 is connected with the reinforced connection portion 223, the other end of the inclined transition portion 224 is connected with the connection portion 225, after the connection portion 225 is connected with the partition plate portion 1, after the battery pack 100 is impacted, a certain protection effect can be provided for the partition plate portion 1 through the structural arrangement of the connection protruding strip 221, and the partition plate portion 1 is prevented from being impacted or deformed due to the action of the external force close to the first side plate 22, so that the cooling effect of the partition plate portion 1 on the battery pack 100 is affected.

Thus, the connecting ribs 221 can facilitate welding between the partition plate portion 1 and the body of the first side plate 22, and the shape and structure of the connecting ribs 221 can protect the partition plate portion 1.

In some embodiments, the side gusset portion 2 further comprises a first cover plate 4 and a second cover plate 5, which are open at both sides of the partition portion 1, the first cover plate 4 and the second cover plate 5 being used to close both sides of the side gusset portion 2, respectively; the first side plate 22 is provided with mounting ribs 222 on both sides of the connecting ribs 221, and the two mounting ribs 222 are connected to the first cover plate 4 and the second cover plate 5, respectively.

In practice, the mounting ribs 222 extend toward the partition portion 1, and the mounting ribs 222 are spaced apart from the connecting ribs 221 in parallel, the mounting ribs 222 further extend along the length direction of the first side plate 22, the first cover plate 4 and the second cover plate 5 are adhered to the surfaces of the upper and lower battery cells 3, respectively, the first cover plate 4 and the second cover plate 5 may be plate structures without cavities, or may be multi-layer plate structures with cavities through which heat conductive substances can flow, when the first cover plate 4 and the second cover plate 5 are arranged as cavities and through which heat conductive substances can flow, if a cooling medium can be arranged, after the first cover plate 4 and the second cover plate 5 are connected with the first side plate 22, the cooling medium can be injected into the first cover plate 4 and the second cover plate 5 to cool the sides of the battery cells 3 away from the partition portion 1, so that both sides of the battery cells 3 in each mounting space along the height direction of the mounting frame can be cooled, and the cooling effect can be further enhanced.

When the first cover plate 4 and the second cover plate 5 are respectively connected with the corresponding mounting protruding strips 222, for example, welding, the welding surface area of the first cover plate 4 and the corresponding mounting protruding strips 222 can be increased, the reliability of the connection between the first cover plate 4 and the second cover plate 5 and the first side plate 22 is further enhanced, that is, the connection reliability of the first cover plate 4 and the second cover plate 5 and the first side plate 22 is ensured, the body of the first side plate 22 is ensured to be lighter and thinner, and the light weight is realized.

In addition, the first cover plate 4 and the second cover plate 5 in the embodiment of the utility model are respectively welded and fixed with the side wall plate part 2, so that the use of sealing strips can be reduced through welding, the connection of bolts is reduced, and the space is saved.

In addition, it should be noted that, the outer side of the first side plate 22 is provided with a plurality of connecting blind holes, the plurality of connecting blind holes are all distributed at intervals on the outer side of the position of the connecting raised line 221, and are also distributed on the outer side of the position of the mounting raised line 222, so that the battery pack is convenient to be connected with other components except the battery pack 100 by arranging the plurality of connecting blind holes.

In some embodiments, the side wall panel 2 further includes a second side plate 21, the second side plate 21 is connected between the ends of the two first side plates 22, the second side plate 21 includes two sub-side plates 211, and the ends of the sub-side plates 211 are connected to the mounting ribs 222 and the connecting ribs 221, respectively.

Referring to fig. 3, the second side plate 21 may be provided as a whole with a gap through which the partition plate portion 1 passes, or the second side plate 21 may be provided to include two sub-side plates 211, and by providing both ends of the two sub-side plates 211 to be connected to the corresponding first side plates 22, it is convenient to connect the second side plate 21 to the first side plates 22 while avoiding the partition plate portion 1.

In addition, the ends of the sub-side plates 211 are connected to the mounting ribs 222 and the connecting ribs 221, respectively, and the contact area between the sub-side plates 211 and the mounting ribs 222 and the connecting ribs 221 can be increased due to the structural design of the mounting ribs 222 and the connecting ribs 221, so that the reliability of the connection between the second side plates 21 and the first side plates 22 can be further enhanced.

In some embodiments, the two sub-side plates 211 are spaced apart and form a mounting gap through which the end of the bulkhead portion 1 protrudes out of the side wall plate portion 2.

In actual mounting, the end of the partition plate portion 1 faces the mounting gap between the two sub-side plates 211 and protrudes through the mounting gap beyond the side wall plate portion 2, and when the two sub-side plates 211 at the same end are mounted, one sub-side plate 211 is connected to the connecting ridge 221 and one mounting ridge 222 of the first side plate 22 at the mounting space above, and the other sub-side plate 211 is connected to the connecting ridge 221 and the other mounting ridge 222 at the mounting space below. Thereby, the gap between the two sub-side plates 211 is used for the partition plate portion 1 to pass through, so that the cooling joint 111 of the partition plate portion 1 can be disposed outside the side gusset portion 2.

Further, when the two sub-side plates 211 at the same end are connected to the mounting convex line 222 and the connecting convex line 221, sealing treatment such as adhesive sealing or welding sealing is performed between each sub-side plate 211 and the partition plate portion 1.

In some embodiments, the upper and lower sides of the end of each sub-side plate 211 are provided with a relief opening 212, and the relief opening 212 is used for avoiding the mounting convex strips 222 and the connecting convex strips 221 connected with the sub-side plate 211.

In practice, when the sub-side plate 211 is provided with the avoidance openings 212, the sub-side plate 211 can be connected with the first side plate 22, the sub-side plate 211 is firstly clamped at the positions of the installation raised lines 222 and the connection raised lines 221 through the avoidance openings 212 at the two ends, and then the sub-side plate 211 and the partition plate part 1 and the positions of the sub-side plate 211 and the first side plate 22 are subjected to sealing treatment, and the two sub-side plates 211 are additionally provided, so that when the sub-side plate 211 is connected with the first side plate 22, the two sub-side plates 211 can adjust the respective positions to be more accurately connected with the positions of the connection raised lines 221 and the installation raised lines 222 and be installed.

Specifically, the bottom of the installation convex strip 222 is provided with an oblique chamfer, along the height direction of the installation frame, the structure of the avoiding opening 212 on one side of the sub-side plate 211 is matched with the oblique chamfer on the bottom of the installation convex strip 222 to enhance the contact area of connection, and the structure of the avoiding opening 212 on the other side of the sub-side plate 211 is matched with the structures such as the reinforced connection part 223, the inclined transition part 224, the connection part 225 and the like of the connection convex strip 221 to enhance the connection reliability of the sub-side plate 211 and the first side plate 22.

In some embodiments, the separator 1 includes a current collector 11 and a main board 12, where both ends of the main board 12 are connected with the current collector 11, the main board 12 is located in the side wall plate 2, and the current collector 11 extends out of the side wall plate 2 and is provided with a cooling joint 111.

In practice, the current collector 11 and the main board 12 are connected into a whole, the current collector 11 is provided with a cooling joint 111, the current collector 11 is further provided with a cavity, and the cavity is communicated with the cavity of the main board 12 to form a cooling flow channel, so that the current collector 11 can collect cooling liquid and flow into the cavity in the main board 12. In actual installation, the main board 12 and the side wall 2 may be integrated, the second side board 21 may be connected to the first side board 22, and the current collector 11 may be connected to the main board 12 through a gap between the two sub-side boards 211. The current collector 11 is connected with the main plate body 12 to form the partition plate portion 1, so that the cooling joint 111 can be more conveniently arranged.

Thus, the sub-side plates 211 can be easily mounted by separating the current collector 11 from the main plate body 12, and the current collector 11 provided with the cooling joints 111 of different structures can be connected to the main plate body 12 according to actual situations.

In some embodiments, the thickness of current collector 11 is greater than the thickness of main plate body 12. Firstly, the thickness of the current collector 11 is larger than that of the main board 12, so that the cooling joint 111 can be designed conveniently, in addition, the strength of the current collector 11 is guaranteed to a certain extent, the current collector 11 is positioned outside the side wall plate part 2 and is contacted with or nearer to the collision force received by the outside of the battery pack 100, and due to the design of the thickness of the current collector 11, the battery pack 100 has a better buffering effect when receiving the external acting force, and the battery core 3 and the partition plate part 1 in the battery pack 100 can be protected.

In some embodiments, the cooling joint 111 is provided at a middle position of the current collector 11 in the width direction of the separator portion 1.

In practice, the cooling joint 111 is connected to an external cooling source line, so that the coolant flows into the cooling flow passage in the partition plate portion 1. The cooling joint 111 is arranged at the middle part of the current collector 11 along the width direction of the partition plate part 1, so that the cooling liquid can uniformly flow to different directions of the current collector 11, and then the flow direction of the whole partition plate part 1 is more uniform, so that the cooling liquid can more uniformly cool the battery cells 3 in different installation spaces.

Further, the cooling connectors 111 may be provided in plural numbers, so that the cooling sources can be conveniently connected to the cooling sources through the plural cooling connectors 111 at the same time, so that the cooling liquid can quickly flow into the partition plate portion 1 and quickly cool the battery cells 3.

In some embodiments, both side gusset portion 2 and baffle portion 1 are extruded members. The extrusion can be performed by utilizing short bars, so that the process cost is well controlled, the flow of materials is well controlled in the processing process of the extruder, and the high-precision side wall plate part 2 and the partition plate part 1 can be obtained.

1. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

2. In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

3. In the description of the present utility model, "plurality" means two or more.

4. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

5. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

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

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

The battery pack comprises a mounting frame, a battery pack and a battery pack, wherein the mounting frame comprises a side surrounding plate part and a partition plate part, the partition plate part is positioned in the side surrounding plate part, and mounting spaces are respectively formed on two sides of the partition plate part by the side surrounding plate part and are used for mounting battery cells;

The cooling device comprises a partition plate part, a cooling flow passage is formed in the partition plate part, the end part of the partition plate part penetrates through the side wall plate part and extends out of the side wall plate part, and a cooling joint communicated with the cooling flow passage is arranged at the end part of the partition plate part.

2. The battery pack according to claim 1, wherein the side wall plate portion includes two oppositely-distributed first side plates, connecting convex strips parallel to the partition plate portion are respectively provided at middle positions of side surfaces of the two side plates facing each other, and both ends of the partition plate are fixedly connected to the connecting convex strips.

3. The battery pack according to claim 2, further comprising a first cover plate and a second cover plate, the side gusset portion being open on both sides of the separator plate portion, the first cover plate and the second cover plate being for closing both sides of the side gusset portion, respectively;

The first side plates are respectively provided with mounting raised lines on two sides of the connecting raised lines, and the two mounting raised lines are respectively connected with the first cover plate and the second cover plate.

4. The battery pack of claim 3, wherein the side gusset portion further comprises a second side panel connected between ends of the two first side panels, the second side panel comprising two sub-side panels, ends of the sub-side panels being connected to the mounting rib and the connecting rib, respectively.

5. The battery pack of claim 4 wherein two sub-side plates are spaced apart and form a mounting gap therebetween, the ends of the separator portion extending beyond the side gusset portion through the mounting gap.

6. The battery pack according to claim 4, wherein the upper and lower sides of the end portion of each of the sub-side plates are provided with escape openings for escaping the mounting ribs and the connecting ribs connected to the sub-side plates.

7. The battery pack according to claim 1, wherein the separator includes a current collector and a main plate body, both ends of the main plate body are connected with the current collector, the main plate body is located in the side wall plate portion, and the current collector extends out of the side wall plate portion and is provided with the cooling joint.

8. The battery pack of claim 7, wherein the current collector has a thickness greater than a thickness of the main plate body.

9. The battery pack according to claim 7, wherein the cooling joint is provided at a middle position of the current collector in the width direction of the separator portion.

10. The battery pack of claim 1, wherein the side rail portion and the separator portion are each extruded members.