CN218242025U - Battery pack shell and battery pack - Google Patents

Abstract

The utility model provides a battery package casing and including the battery package of this battery package casing. The battery shell comprises side plates and end covers, wherein the side plates and the end covers jointly define a cavity suitable for containing batteries; the end cover is suitable for limiting the cavity in the length direction of the battery, and the side plate is suitable for limiting the battery in the width direction and the thickness direction of the battery; the side plate comprises a base plate and ribs, and the ribs are arranged to protrude out of the base plate; the battery pack housing is insulated at least at a side facing the cavity. This battery package casing can avoid the battery to set up the insulating part in addition with the position of curb plate contact, has improved the structural strength of battery package casing simultaneously, and the security and the reliability of battery package obtain promoting.

Description

Battery pack shell and battery pack

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery package casing and battery package are related to.

Background

In the related art, the battery pack generally includes a metal tray and batteries adhered to the metal tray. In order to prevent the electric leakage of the shell, an insulating part is additionally arranged at the contact position of the battery and the tray, so that the space utilization rate is reduced, and the manufacturing process and the cost of the battery pack are increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery package casing and have battery package of above-mentioned battery package casing.

In order to achieve the above object, a first aspect of the present invention provides a battery pack case, including a plurality of side plates and end caps; the side plates are arranged in an enclosing manner to form a cavity with an open end, the cavity is suitable for accommodating a battery, and the side plates are suitable for limiting the battery in the width direction and the thickness direction of the battery; the end cap is adapted to close the open end of the cavity; at least one side plate comprises a base plate and ribs, and the ribs are arranged to protrude out of the base plate; the plurality of side plates are composed of an insulating material.

The curb plate comprises insulating material and can avoid the battery to set up insulating part in addition with the position of curb plate contact, and there may be the not enough problem of intensity in no additional strengthening's insulating material board, and the rib can carry out the structure to the curb plate and strengthen, does not set up insulating part in addition to the structural strength who has improved the battery package casing when simplifying structure and technology.

According to some embodiments of the invention, the cavity comprises two oppositely disposed open ends; at least one of the side panels includes a plurality of ribs extending from one of the open ends to the other open end.

According to some embodiments of the present invention, the plurality of side plates are of an integrally formed structure.

According to some embodiments of the invention, the plurality of side plates are extrusion molded structures.

According to some embodiments of the present invention, the plurality of side plates includes two first side plates, and the two first side plates are disposed at opposite ends of the battery pack case in the battery thickness direction;

the ribs include first ribs protruding from the substrate in the cell thickness direction;

each of the first side panels includes a plurality of first ribs.

According to some embodiments of the invention, at least part of the first ribs protrude towards the cavity in the battery thickness direction towards the substrate.

According to some embodiments of the invention, at least part of the first ribs are away from the cavity in the thickness direction of the battery to protrude from the substrate.

According to some embodiments of the present invention, the plurality of side plates further includes two second side plates, the two second side plates are disposed at opposite ends of the battery pack case in the battery width direction;

the ribs further include second ribs protruding from the substrate in the cell width direction;

each second side plate comprises a plurality of second ribs, and the second ribs are far away from the cavity and protrude out of the base plate.

According to some embodiments of the invention, at least one of the side panels further comprises a guard beam; one end of the rib, which is far away from the substrate, is covered by the protective beam.

According to some embodiments of the invention, at least one of the first side panels further comprises a guard beam; the first ribs protruding the substrate toward the cavity include first ends proximate the substrate and second ends distal from the substrate, the second ends of the first ribs being covered by the guard beams.

According to some embodiments of the utility model, a plurality of curb plates still include two second curb plates, two the second curb plate set up in the battery package casing is in the ascending relative both ends of battery width direction, the guard beam supports in two between the second curb plate.

According to some embodiments of the invention, the density of the ribs on the first side plate is greater than the density of the ribs on the second side plate.

According to some embodiments of the utility model, the curb plate with be provided with joint strip between the end cover.

According to some embodiments of the utility model, the battery can casing includes insulating first limiting plate and second limiting plate, first limiting plate with the second limiting plate set up in the curb plate is in near the ascending relative both ends of length direction of battery, just first limiting plate with the second limiting plate is suitable for the length direction of battery is right the battery carries on spacingly.

A second aspect of the present invention provides a battery pack, including the present invention provides a battery pack case and at least one battery, the battery is disposed in the cavity defined by the battery pack case.

The utility model discloses an energy storage system that second aspect provided, because include the utility model discloses a battery package casing that the first aspect provided, security and reliability are promoted.

According to some embodiments of the present invention, the battery pack includes a plurality of batteries, the plurality of batteries are along the range upon range of setting of thickness direction of battery.

According to some embodiments of the utility model, the battery package still includes first total electrode, the total electrode of second and at least one mount, first total electrode with the total electrode of second sets up the length direction's of battery one end or both ends, the mount is insulating, just the mount is in at least the length direction protection of battery first total electrode and/or the total electrode of second.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery pack according to some embodiments of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 in phantom at position D;

fig. 3 is a schematic perspective view of a side panel according to some embodiments of the present invention;

fig. 4 is a side panel cross-sectional view according to some embodiments of the present invention;

fig. 5 is a schematic diagram of a battery pack housing portion, according to some embodiments of the present invention;

fig. 6 is a schematic diagram of a battery assembly process according to some embodiments of the present invention;

fig. 7 is a schematic diagram of a battery assembly according to some embodiments of the present invention;

fig. 8 is a schematic view of a mount structure according to some embodiments of the present invention.

Reference numerals are as follows:

the battery pack comprises a battery pack 1, a battery pack shell 100, a side plate 110, a base plate 111, ribs 112, first ribs 1121, a first end 1121a, a second end 1121b, second ribs 1122, a first side plate 113, a second side plate 114, a protective beam 115, a long cavity 116, threads 117, a first end cover 121, a second end cover 122, a hook 123, a sealing rubber strip 130, a first limiting plate 141, a second limiting plate 142, a battery 200, a pole 210, a connecting sheet 220, a cavity 300, a first total electrode 400, a second total electrode 500, a fixing frame 600, a cable 700, a current output terminal 800 and a battery management system 900.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more than two, and "a plurality" means one or more than one.

As shown in fig. 1 to 8, a battery pack 1 according to an embodiment of the present invention includes a battery pack case 100 and at least one battery 200. Alternatively, the battery pack includes a plurality of batteries 200, and the plurality of batteries 200 are stacked in the thickness direction of the batteries 200.

The battery pack case 100 comprises a plurality of side plates 110 and end covers, wherein the plurality of side plates 110 surround to form a cavity 300 with an open end, the cavity 300 is suitable for accommodating the battery 200, and the plurality of side plates 110 are suitable for limiting the battery 200 in the width direction and the thickness direction of the battery 200; the end cap is adapted to close the open end of the cavity 300; at least one side plate 110 comprises a base plate 111 and ribs 112, wherein the ribs 112 are arranged to protrude from the base plate 111; the plurality of side plates 110 are made of an insulating material.

Specifically, the battery 200 has a length direction, a width direction, and a thickness direction orthogonal to each other, a dimension of the battery 200 in the length direction is defined as L, a dimension of the battery 200 in the width direction is defined as W, a dimension of the battery 200 in the thickness direction is defined as D, and L, W, D satisfy: l is more than or equal to W and more than or equal to D.

Illustratively, the longitudinal direction of the battery 200 is the X direction, the width direction of the battery 200 is the Z direction, the thickness direction of the battery 200 is the Y direction, and the Z direction is the height direction of the battery pack 1 in the normal arrangement state of the battery pack 1.

Because the side plate 110 is made of insulating materials, the battery 200, the connecting sheet and other conductive parts can be directly contacted with the side plate 110, and an insulating part is not needed to be additionally arranged to separate the side plate 110 from the battery 200, the connecting sheet and other conductive parts, so that the space utilization rate is improved, the working hours are saved, and the cost is saved. When the side panel 110 is made of a material suitable for extrusion molding, for example, polypropylene (PP) or polyvinyl pyrrolidone (PVP) is used, so that the side panel 110 can be easily manufactured by extrusion molding.

The battery 200 tends to expand during use, the expansion of the battery 200 generates a pressing force to the side plate 110, the capacity causes the side plate 110 to deform, and the width direction and the thickness direction of the battery 200 are the main directions of expansion of the battery 200, so that the side plate 110 becomes a main force-receiving structure that receives the pressing force generated by the expansion of the battery 200. While the unreinforced insulating plate often has strength which does not meet the use requirements of the battery pack 1, the ribs 112 are arranged on the side plate 110, so that the side plate 110 can be reinforced while insulativity is obtained, the probability and the degree of extrusion deformation of the side plate are reduced, and the structural reliability of the battery pack shell 100 is improved; meanwhile, the side plate 110 may in turn suppress swelling of the battery 200, improving stability of the battery 200.

Specifically, the cavity 300 formed by enclosing the plurality of side plates 110 may be open at one end or open at both ends, and when one end of the cavity 300 is open, only one end cap may be provided, and when both ends of the cavity 300 are open, two end caps may be provided. The base 111 may be a flat plate structure, the rib 112 may be a strip structure, and the rib 112 and the base 111 may be integrally formed or fixed to each other by bonding or riveting.

According to the utility model discloses a some embodiments, when the end cover can wholly be made by insulating material, can choose for use suitable extrusion molding or injection moulding's material to the convenience is through extrusion molding or injection moulding preparation end cover.

According to some embodiments of the present invention, as shown in fig. 4, the chamber 300 includes two open ends disposed opposite to each other; at least one side panel 110 includes a plurality of ribs 112, the ribs 112 extending from one of the open ends to the other open end.

The provision of the plurality of ribs 112 may further improve the strength of the side plate 110, the structural reliability of the pack case 100, and the stability of the battery 200. The ribs 112 extend between the two open ends, so that the side plate 110 can be conveniently extruded and manufactured integrally by adopting an extrusion molding process, the manufacturing efficiency of the side plate 110 is improved, and the cost is reduced.

According to some embodiments of the present invention, the plurality of side plates 110 are integrally formed. The plurality of side plates 110 are integrally formed, that is, the plurality of side plates 110 are integrally formed as a whole. The side plate 110 is formed integrally, so that the cost of parts and the assembly process can be saved, and the strength of the side plate can be improved. The side plate 110 may be integrally formed by using extrusion molding, injection molding, or the like. Alternatively, the side panel 110 is integrally formed by using an extrusion molding process, thereby reducing manufacturing costs.

According to some embodiments of the present invention, the plurality of side plates 110 are extrusion molded structures. The extrusion molding can reduce the manufacturing cost of the plurality of side plates 110.

According to some embodiments of the present invention, the plurality of side plates 110 includes two first side plates 113, and the two first side plates 113 are disposed at two opposite ends of the battery pack case 100 in the thickness direction of the battery 200; the ribs 112 include first ribs 1121 that protrude the substrate 111 in the thickness direction of the battery 200; each first side panel 113 includes a plurality of first ribs 1121.

When the battery 200 has a substantially rectangular parallelepiped shape as a whole, two surfaces opposed to each other in the thickness direction of the battery 200 are large surfaces having the largest area of the battery 200. The large surface of the battery 200 tends to be the surface where the swelling deformation phenomenon is most severe during the use of the battery. Since the two first side plates 113 are provided at the opposite ends of the battery pack case 100 in the thickness direction of the battery 200, the first side plates 113 are disposed in contact with or adjacent to the large face of the battery 200 at this time. The plurality of first ribs 1121 provided on the first side plate 113 can suppress the large-area expansion of the battery 200, and reduce the degree and probability of deformation of the battery pack case 100 due to the expansion of the battery 200, thereby improving the cycle stability and the service life of the battery pack.

According to some embodiments of the present invention, at least a portion of the first ribs 1121 of the first side plate 113 protrudes the base plate 111 toward the cavity 300 in the thickness direction of the battery 200.

At least a part of the first ribs 1121 protrudes toward the cavity 300 in the thickness direction of the battery 200, at least a part of the first ribs 1121 on one of the first side plates 113 may protrude toward the cavity 300, or at least a part of the first ribs 1121 on each of the first side plates 113 of the two first side plates 113 may protrude toward the cavity 300. At least part of first ribs 1121 protrudes toward cavity 300, so that at least part of first ribs 1121 occupy partial volume of cavity 300 in the thickness direction of battery 200, and the partial volume of cavity 300 occupied by first ribs 1121 in the thickness direction of battery 200 is not suitable for placing battery 200 again, but parts such as connectors and bolts can be placed in gaps between different first ribs 1121 inside the cavity, thereby improving the space utilization rate of the whole battery pack.

According to some embodiments of the present invention, at least a portion of the first ribs 1121 protrudes from the substrate 111 away from the cavity 300 in the thickness direction of the battery 200. Thus, the number of the first ribs 1121 on the first side plate 113 can be increased, and the first side plate 113 can be further reinforced.

According to some embodiments of the present invention, the plurality of side plates 110 further includes two second side plates 114, the two second side plates 114 are disposed at two opposite ends of the battery pack case 100 in the width direction of the battery 200; rib 112 further includes second rib 1122 protruding from base plate 111 in the width direction of cell 200; each second side plate 114 includes a plurality of second ribs 1122, the second ribs 1122 protruding from the base plate 111 away from the cavity 300.

In some application scenarios of the battery pack, when the pole of the battery 200 is led out laterally and the width direction of the battery 200 is taken as the up-down direction, the second side plate 114 is the main bearing surface. Providing the second ribs 1122 on the second side plate 114 can increase the strength of the second side plate 114. Second ribs 1122 protrude away from cavity 300, i.e. second ribs 1122 are provided outside the cavity.

According to some embodiments of the present invention, the at least one side panel 110 further comprises a guard beam 115; the ends of the ribs 112 remote from the base plate 111 are covered by guard beams 115. At this time, the end of the rib 112 away from the substrate 111 is covered by the guard beam 115 without the possibility of direct contact with the internal battery 200 or other external devices, thereby preventing damage to the battery or other devices.

According to some embodiments of the present invention, the at least one side plate 110 further comprises a guard beam 115; the first ribs 1121 protruding out of the base plate 111 toward the cavity 300 include first ends 1121a close to the base plate 111 and second ends 1121b distant from the base plate 111, and the second ends 1121b of the first ribs 1121 are covered by the guard beams 115.

The second end 1121b is covered by the guard beam 115, and at this time, the second side plate 114, the guard beam 115, and the first rib 1121 surround to form a plurality of long cavities 116, and the plurality of long cavities 116 are arranged in the width direction of the battery to form a structure similar to a harmonica air duct. At this time, the second ends 1121b of the first ribs 1121, which protrude toward the cavity 300, are covered by the protection beam 115, so that there is no possibility of direct contact with the battery 200, and damage to the battery 200 or the side plate 110 due to excessive pressure caused by a small contact area between the battery 200 and the side plate 110 when the interaction force between the battery 200 and the side plate 110 is large is avoided. In addition, the enclosed long cavities 116 can reinforce the battery pack housing 100 to some extent, and can insulate the battery pack.

The number of the guard beams 115 may be set according to the number of the first side plates 113 provided with the first ribs 1121 protruding the substrate 111 toward the cavity 300. Specifically, if only one first side plate 113 is provided with the first ribs 1121 protruding out of the substrate 111 toward the cavity 300, the number of the guard beams 115 may be one; if the first ribs 1121 protruding the substrate 111 toward the cavity 300 are provided on both the first side plates 113, the number of the guard beams 115 may be two.

According to some embodiments of the present invention, the side plate 110 further includes two protection beams 115, and the two protection beams 115 are disposed near the opposite ends of the battery pack case 100 in the thickness direction of the battery 200.

When the first ribs 1121 protruding toward the cavity 300 and protruding out of the substrate 111 are disposed on the two first side plates 113, the two protection beams 115 may respectively cover the first ribs 1121 protruding toward the cavity 300 on the two first side plates 113, so as to prevent the battery 200 or the side plate 110 from being damaged due to excessive interaction pressure between the battery 200 and the side plate 110, and in addition, the plurality of enclosed long cavities 116 may further reinforce the battery pack case 100, and perform a heat preservation function on the battery pack.

According to some embodiments of the present invention, the side plate 110 further includes two second side plates 114, the two second side plates 114 are disposed at opposite ends of the battery pack case 100 in the width direction of the battery 200, and the protection beam 115 is supported between the two second side plates 114.

The protective beam 115 is supported between the two second side plates 114, which means that two ends of the protective beam 115 are respectively in contact with the two second side plates 114, and at this time, the protective beam 115 can reinforce the battery pack case 100 in the width direction of the battery 200, thereby improving the reliability of the whole battery pack.

According to some embodiments of the present invention, the density of the ribs 112 on the first side panel 113 is greater than the density of the ribs 112 on the second side panel 114.

The density of the ribs 112 on the first side panels 113 may be understood as the total volume of ribs 112 on both sides of each first side panel 113 divided by the total area of both sides of each first side panel 113; the density of the ribs 112 on the second side panel 114 is understood to be the total volume of the ribs 112 on both sides of each second side panel 114 divided by the total area of both sides of each second side panel 114. The density of the ribs 112 on the first side plate 113 is greater than the density of the ribs 112 on the second side plate 114, which means that the ribs 112 reinforce the first side plate 113 more than the second side plate 114, and in the case that the strength of the base plate 111 is the same, the strength of the first side plate 113 is greater than that of the second side plate 114. Although the second side plate 114 generally serves as a load-bearing surface in the application scenario of the battery pack, the first side plate 113 is often subjected to a greater pressure due to the expansion of the battery surface than the second side plate 114 due to the load-bearing. Therefore, the strength of the first side plate 113 is greater than that of the second side plate 114, so that the first side plate 113 facing the large surface of the battery 200 can effectively inhibit the expansion and deformation of the battery, and the cycle stability and the service life of the battery are improved.

According to some embodiments of the present invention, at least a portion of the first ribs 1121 of the first side plate 113 is away from the cavity 300 in the thickness direction of the battery 200 to protrude, so as to improve the density of the ribs on the first side plate 113, and improve the strength of the first side plate 113.

According to some embodiments of the present invention, the end cap includes a first end cap 121 and a second end cap 122, and the first end cap 121 and the second end cap 122 are disposed at two ends of the battery pack case 100 in a length direction.

Illustratively, the battery pack case 100 is generally rectangular parallelepiped in shape as a whole, the first end cap 121 and the second end cap 122 are provided at both ends of the battery pack case 100 in the longitudinal direction, and the long sides of the first side plate 113 and the second side plate 114 extend in the longitudinal direction of the battery pack case 100 and are joined end to end in the width direction and the thickness direction of the battery pack case 100.

According to some embodiments of the present invention, a sealing strip 130 is provided between the side plate 110 and the end cap. The sealing rubber strip 130 can improve the sealing performance between the side plate 110 and the end cover, thereby improving the waterproof performance of the battery pack. The end cover is provided with threads, the side plate 110 is also provided with threads 117 at the position corresponding to the threads on the end cover, and the end cover can be fixed on the side plate 110 through bolt connection.

According to some embodiments of the present invention, as shown in fig. 5 and 7, the battery pack case 100 further includes a first limiting plate 141 and a second limiting plate 142, the first limiting plate 141 and the second limiting plate 142 are insulating plates, the first limiting plate 141 and the second limiting plate 142 are disposed near the opposite ends of the side plate in the length direction of the battery 200, and the first limiting plate 141 and the second limiting plate 142 are suitable for limiting the battery 200 in the length direction of the battery 200.

The position of battery 200 in battery pack case 100 can be fixed to the setting of first limiting plate 141 and second limiting plate 142, prevents that battery 200 from rocking in battery pack case 100, improves the structural reliability of battery pack.

When the utmost point post 210 of battery 200 sets up in battery 200 length direction's one end or both ends, can make first limiting plate 141 and second limiting plate 142 avoid utmost point post 210, connect the connection piece 220 of utmost point post 210 with the setting, at this moment, first limiting plate 141 and second limiting plate 142 carry out spacingly in battery 200 length direction, can also play the effect of protection to utmost point post 210 and connection piece 220 of battery 200 in battery 200 length direction.

Optionally, the first limiting plate 141 and the second limiting plate 142 are provided with threads, the side plate 110 is also provided with threads 117 at positions corresponding to the threads of the first limiting plate 141 and the second limiting plate 142, and the first limiting plate 141 and the second limiting plate 142 can be fixed on the side plate 110 through bolt connection. The bolt connection enables the first and second stopper plates 141 and 142 to be detachably fixed to the side plates 110, thereby facilitating the movement of the battery 200 into and out of the battery pack case 100.

According to some embodiments of the present invention, the battery pack further includes a first total electrode 400, a second total electrode 500 and at least one fixing frame 600, the first total electrode 400 and the second total electrode 500 are disposed at one end or both ends of the length direction of the battery 200, the fixing frame 600 is insulated, and the fixing frame 600 protects the first total electrode 400 and/or the second total electrode 500 at least in the length direction of the battery 200.

The first and second bus electrodes 400 and 500 are mainly used to draw out and connect the current of the battery 200 to the cable 700, and draw out the current to the current output terminal 800 of the battery pack through the cable 700, thereby supplying power to the outside. The first and second total electrodes 400 and 500 may be aluminum rows, copper rows, etc. The first total electrode 400 may be one of a total positive electrode and a total negative electrode, and the second total electrode 500 may be the other of the total positive electrode and the total negative electrode.

Illustratively, as shown in fig. 8, the fixing frame 600 includes a bottom surface and three side surfaces, the three side surfaces are connected to three sides of the bottom surface, and the three side surfaces are approximately perpendicular to the bottom surface. The first total electrode 400 and/or the second total electrode 500 are at least partially arranged in a space surrounded by three side surfaces and the bottom surface of the fixing frame 600, so that the fixing frame 600 at least protects the first total electrode 400 and/or the second total electrode 500 in the length direction of the battery 200, and simultaneously protects the connection part of the first total electrode 400 and/or the second total electrode 500 and the cable 700, thereby avoiding short circuit or damage of the connection part and improving the safety of the battery pack. The fixing frame 600 may be provided with a threaded hole, and the fixing frame 600, the first and/or second limiting plate 141, 142 and the side plate 110 may be fixed together by bolting.

According to some embodiments of the present invention, the battery pack includes a Battery Management System (BMS) 9, and the battery management system 900 is disposed on the end cap. The end cover can be further provided with a hook 123 to facilitate the hoisting of the battery pack. According to some embodiments of the present invention, the hooks 123 may be disposed on the first end cap 121 and the second end cap 122, respectively, so as to facilitate the hoisting of the battery pack.

In the description of the present specification, references to the description of "a particular embodiment" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

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

Claims (17)

1. A battery pack shell is characterized by comprising a plurality of side plates and end covers; the side plates are arranged in an enclosing manner to form a cavity with an open end, the cavity is suitable for accommodating a battery, and the side plates are suitable for limiting the battery in the width direction and the thickness direction of the battery; the end cap is adapted to close the open end of the cavity; at least one side plate comprises a base plate and ribs, and the ribs are arranged to protrude out of the base plate; the plurality of side plates are composed of an insulating material.

2. The battery pack housing of claim 1, wherein the cavity comprises two oppositely disposed open ends;

at least one of the side panels includes a plurality of ribs extending from one of the open ends to the other open end.

3. The battery pack housing of claim 1, wherein the plurality of side plates are of an integrally molded construction.

4. The battery pack housing of claim 3, wherein the plurality of side plates are of an extruded structure.

5. The battery pack case according to claim 1, wherein the plurality of side plates include two first side plates provided at opposite ends of the battery pack case in the battery thickness direction;

the ribs include first ribs protruding from the substrate in the cell thickness direction;

each of the first side panels includes a plurality of first ribs.

6. The battery pack housing of claim 5, wherein at least a portion of the first ribs protrude the substrate in the cell thickness direction toward the cavity.

7. The battery pack housing of claim 5, wherein at least a portion of the first ribs protrude the substrate away from the cavity in the cell thickness direction.

8. The battery pack case according to claim 5, wherein the plurality of side plates further comprises two second side plates provided at opposite ends of the battery pack case in the battery width direction;

the ribs further include second ribs protruding from the substrate in the cell width direction;

each second side plate comprises a plurality of second ribs, and the second ribs protrude out of the base plate away from the cavity.

9. The battery pack housing of claim 1, wherein at least one of the side plates further comprises a guard beam; one end of the rib, which is far away from the substrate, is covered by the protective beam.

10. The battery pack case of claim 6, wherein at least one of the first side plates further comprises a guard beam; the first ribs protruding the substrate toward the cavity include first ends proximate the substrate and second ends distal from the substrate, the second ends of the first ribs being covered by the guard beams.

11. The battery pack case according to claim 10, wherein the plurality of side plates further includes two second side plates provided at opposite ends of the battery pack case in the width direction of the battery, the protective beam being supported between the two second side plates.

12. The battery pack case of claim 8, wherein the density of the ribs on the first side panel is greater than the density of the ribs on the second side panel.

13. The battery pack housing of claim 1, wherein a sealant strip is disposed between the side plate and the end cap.

14. The battery pack case according to claim 1, wherein the battery pack case includes first and second insulating limit plates disposed near opposite ends of the side plates in a length direction of the battery, and the first and second limit plates are adapted to limit the battery in the length direction of the battery.

15. A battery pack comprising a battery pack housing according to any one of claims 1 to 14 and at least one battery disposed in the cavity defined by the battery pack housing.

16. The battery pack according to claim 15, wherein the battery pack includes a plurality of cells that are stacked in a thickness direction of the cells.

17. The battery pack according to claim 15, wherein the battery pack further comprises a first total electrode, a second total electrode, and at least one fixing frame, the first total electrode and the second total electrode are disposed at one end or both ends of the battery in the length direction, the fixing frame is insulated, and the fixing frame protects the first total electrode and/or the second total electrode at least in the length direction of the battery.

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