Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises a frame, a bottom guard plate and an upper cover, the bottom guard plate is connected with the frame, the bottom guard plate is located below the frame, the upper cover is connected with the frame, the upper cover is located above the frame, and the frame, the bottom guard plate and the upper cover define an accommodating space; the frame comprises a side beam and an end beam located at the end of the side beam, a first connecting part and a second connecting part are formed at the top end and the bottom end of the end beam so as to be connected with the upper cover and the bottom protection plate respectively, and a single-layer plate body is constructed in the middle area of the end beam. Therefore, through the arrangement of the first connecting part and the second connecting part, the connecting strength, the structural reliability and the structural stability of the battery pack are ensured, through the single-layer plate structure between the first connecting part and the second connecting part, the machining difficulty of the end beam can be simplified, the machining cost can be reduced, the sealing difficulty of the battery pack is smaller, and the sealing effect is better. And the overall structure design requirement of the battery pack is effectively met.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack and a vehicle. Background Art

[0002] In the related art, a battery pack defines a containing space through a frame, and battery modules, adapter bars, electronic control components, connectors, etc. are all arranged in the containing space. The frame is defined by the frame, bottom guard plate, and upper cover, but the processing steps of the frame are cumbersome and costly, and it is difficult to seal the end beam on one side where the connector is provided, which cannot meet the overall structural design requirements of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery pack, the processing cost of the frame of the battery pack is lower, and the sealing of the plug-in connector is simpler and more convenient.

[0004] The utility model further proposes a vehicle using the battery pack.

[0005] According to the battery pack of the first aspect embodiment of the utility model, it includes: a frame, a bottom guard plate and an upper cover, the bottom guard plate is connected to the frame and the bottom guard plate is located below the frame, the upper cover is connected to the frame and the upper cover is located above the frame, and the frame, the bottom guard plate and the upper cover define an accommodating space; wherein the frame includes: a side beam and an end beam located at the end of the side beam, the top and bottom ends of the end beam are formed with a first connecting portion and a second connecting portion to be connected to the upper cover and the bottom guard plate respectively, and the middle area of ​​the end beam is constructed as a single-layer plate body.

[0006] According to the battery pack of the embodiment of the utility model, the first connecting part and the second connecting part are provided to ensure the connection strength, structural reliability and stability of the battery pack, and the single-layer plate structure between the first connecting part and the second connecting part can simplify the processing difficulty of the end beam, reduce the processing cost, make the sealing of the battery pack more difficult, and effectively meet the overall structural design requirements of the battery pack.

[0007] According to some embodiments of the present invention, the first connecting portion defines a first cavity, and the second connecting portion defines a second cavity.

[0008] Furthermore, the end beam includes a side plate and a plurality of bending plates, the side plate and the bending plates define the first cavity and the second cavity, and the plurality of bending plates are all located on the inner side of the side plate.

[0009] Further, the bending plate includes a first bending plate, a second bending plate and a third bending plate connected in sequence, the first bending plate is connected to the top end of the side plate, the first bending plate, the second bending plate and the third bending plate define the first connecting portion, and the first bending plate is substantially perpendicular to the side plate, the first bending plate is substantially perpendicular to the second bending plate, and the third bending plate is substantially parallel to the first bending plate.

[0010] Further, the bending plate includes a fourth bending plate, a fifth bending plate and a sixth bending plate connected in sequence, the fourth bending plate is connected to the bottom end of the side plate, the fourth bending plate, the fifth bending plate and the sixth bending plate define the second connecting portion, and the fourth bending plate is substantially perpendicular to the side plate, the fourth bending plate is substantially perpendicular to the fifth bending plate, and the sixth bending plate is substantially parallel to the fourth bending plate.

[0011] Furthermore, a first flanging plate is provided on the free end of the third bending plate, the first flanging plate extends away from the first cavity and is fitted with the side plate, and a second flanging plate is provided on the free end of the sixth bending plate, the second flanging plate extends away from the second cavity and is fitted with the side plate.

[0012] According to some embodiments of the utility model, the battery pack also includes: a support plate, which is used to support the battery module, and the support plate is located above the bottom guard plate, and the end edge of the support plate is connected to the fourth bending plate and / or the fifth bending plate of the second connecting part.

[0013] Furthermore, the fourth bending plate or the fifth bending plate has a containing groove, and the containing groove is used to contain solder.

[0014] In some embodiments, the height dimensions of the first connection portion and the second connection portion are consistent, and the height dimension L1 of the first connection portion and the second connection portion and the height dimension L2 of the end beam satisfy: 0.4≤L1 / L2≤0.6.

[0015] Furthermore, the frame is constructed of rolled steel or extruded aluminum.

[0016] A vehicle according to an embodiment of the second aspect of the utility model includes: a battery pack according to any one of the above embodiments.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model at one angle;

[0020] Figure 2 is a schematic diagram of a battery pack according to an embodiment of the utility model from another angle;

[0021] Figure 3 is a schematic diagram of a frame according to an embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the cooperation between the end beam and the support plate according to an embodiment of the utility model;

[0023] Figure 5 It is a cross-sectional schematic diagram of an end beam and a support plate according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] Battery pack 100,

[0026] Frame 10, end beam 11, side plate 111, first bending plate 112, second bending plate 113, third bending plate 114, fourth bending plate 115, fifth bending plate 116, sixth bending plate 117, first flange plate 118, second flange plate 119, side beam 12,

[0027] Bottom guard plate 20, upper cover 30, support plate 40,

[0028] The first cavity a, the second cavity b, and the accommodating groove c. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Reference below Figure 1-Figure 5 A battery pack 100 and a vehicle according to an embodiment of the present invention are described.

[0031] like Figure 1 and Figure 2As shown, the battery pack 100 according to the embodiment of the first aspect of the utility model includes: a frame 10, a bottom guard plate 20 and an upper cover 30, the bottom guard plate 20 is connected to the frame, the bottom guard plate 20 is located below the frame, the upper cover 30 is connected to the frame, and the upper cover 30 is located above the frame, the frame 10, the bottom guard plate 20 and the upper cover 30 define an accommodating space, that is, the frame 10 is arranged around the peripheral edge of the bottom guard plate 20, and the frame 10 and the bottom guard plate 20 define an accommodating space, the battery module (a plurality of battery cells are arranged in a certain arrangement order, and are connected in series or in parallel to output the required voltage and electric energy), electronic control components, adapter bars, connectors, etc. can be arranged in the accommodating space, and further covered with an upper cover 30 to effectively protect the battery module and other components that need to be protected from collision.

[0032] It should be pointed out that the battery module and other components are arranged in the accommodating space, at least part of the connector is located in the accommodating space, and the other part is located outside the accommodating space, so as to facilitate the electrical connection of the battery pack 100 with external electrical equipment, control equipment, etc., and the overall structure of the frame 10 is a multi-layer plate structure, and the sealing of the area where the connector is set is relatively difficult, which cannot meet the overall structural design requirements of the battery pack 100, and the inner side of the frame 10 is difficult to machine, the processing steps are cumbersome, and the cost is relatively high.

[0033] Based on this, the present invention improves the structure of the frame 10, wherein the frame 10 is defined by two side beams 12 and two end beams 11 arranged opposite to each other (see Figure 3 As shown), one end of the two side beams 12 on the same side is connected to the two ends of an end beam 11, and the other end of the two side beams 12 on the same side is connected to the two ends of another end beam 11, that is, the frame 10 includes: a side beam 12 and an end beam 11 located at the end of the side beam 12, the top and bottom ends of the end beam 11 are formed with a first connecting portion and a second connecting portion to be connected to the upper cover 30 and the bottom guard plate 20 respectively, and the middle area of ​​the end beam 11 is constructed as a single-layer plate body.

[0034] Specifically, the end beam 11 can be connected to the upper cover 30 through a first connection part, and connected to the bottom guard plate 20 through a second connection part, so as to improve the structural strength and structural stability of the battery pack 100, and the middle area of ​​the end beam 11 is constructed as a single-layer plate body, and the connector can pass through the middle area of ​​the end beam 11. The structure of the single-layer plate body is simple, which can reduce the difficulty of machining, reduce the processing steps, and reduce the processing cost. The sealing difficulty of the single-layer plate body is small, and the first connection part and the second connection part protrude toward the accommodating space compared with the single-layer plate structure in the middle area. The single-layer plate structure area can be used to accommodate other structural parts, improve the energy density of the battery pack 100, and meet the overall structural design requirements of the battery pack 100.

[0035] According to the battery pack 100 of the embodiment of the utility model, the first connecting part and the second connecting part are provided to ensure the connection strength, structural reliability and stability of the battery pack 100, and the single-layer plate structure between the first connecting part and the second connecting part can simplify the processing difficulty of the end beam 11, reduce the processing cost, make the sealing difficulty of the battery pack 100 smaller, and effectively meet the overall structural design requirements of the battery pack 100.

[0036] exist Figure 4 and Figure 5 In the illustrated embodiment, according to some embodiments of the present invention, the first connecting portion defines a first cavity, and the second connecting portion defines a second cavity.

[0037] Specifically, the first cavity of the first connecting part protrudes toward the accommodating space relative to the inner surface of the end beam 11, so that the connection area between the upper cover 30 and the end beam 11 is larger, and through the setting of the first cavity, the fasteners connecting the upper cover 30 and the end beam 11 need to pass through at least three layers of plates (one layer of upper cover 30 and at least two layers of the first cavity) to improve the connection strength, and the second cavity of the second connecting part protrudes toward the accommodating space relative to the inner surface of the end beam 11, so that the connection area between the bottom guard plate 20 and the end beam 11 is larger, and through the setting of the second cavity, the fasteners connecting the bottom guard plate 20 and the end beam 11 need to pass through at least three layers of plates (one layer of low guard plate and at least two layers of second cavity) to improve the connection strength.

[0038] At the same time, it should be pointed out that by providing the first cavity and the second cavity, the structural strength of the end plate can be effectively improved, so that the structural strength of the frame 10 and the battery pack 100 is higher.

[0039] like Figure 4 and Figure 5 As shown, further, the end beam 11 includes a side plate 111 and a plurality of bending plates, the side plate 111 and the bending plates define a first cavity and a second cavity, and the plurality of bending plates are all located on the inner side of the side plate 111.

[0040] That is to say, by setting multiple bending plates relative to the side plate 111 to respectively define the first cavity and the second cavity, while improving the structural strength of the end beam 11, the processing difficulty of the end beam 11 is lowered and can be achieved by roll forming, thereby effectively reducing the production cost of the battery pack 100.

[0041] Furthermore, the bending plate includes a first bending plate 112, a second bending plate 113 and a third bending plate 114 which are connected in sequence, the first bending plate 112 is connected to the top end of the side plate 111, the first bending plate 112, the second bending plate 113 and the third bending plate 114 define a first connecting portion, and the first bending plate 112 is substantially perpendicular to the side plate 111, the first bending plate 112 is substantially perpendicular to the second bending plate 113, and the third bending plate 114 is substantially parallel to the first bending plate 112.

[0042] It should be pointed out that the term "substantially vertical" in the present invention refers to approximately or basically vertical, such as the first bending plate 112 and the side plate 111 are perpendicular in the height direction or can deviate by a certain angle (such as 85° to 95°). Similarly, "substantially parallel" refers to approximately or basically parallel, such as the first bending plate 112 and the third bending plate 114 are parallel or can deviate by a certain angle.

[0043] Specifically, one end of the first bending plate 112 is connected to the top end of the side plate 111, the first bending plate 112 extends inward, and the other end of the first bending plate 112 is connected to one end of the second bending plate 113, the second bending plate 113 extends downward, the other end of the second bending plate 113 is connected to the third bending plate 114, and the third bending plate 114 extends outward toward the side plate 111.

[0044] Therefore, the first cavity is defined by the side plate 111, the first bending plate 112, the second bending plate 113 and the third bending plate 114, which can effectively improve the structural strength of the end beam 11 and make the connection stability and reliability between the upper cover 30 and the first connecting part higher.

[0045] Furthermore, the bending plate includes a fourth bending plate 115, a fifth bending plate 116 and a sixth bending plate 117 which are connected in sequence, the fourth bending plate 115 is connected to the bottom end of the side plate 111, the fourth bending plate 115, the fifth bending plate 116 and the sixth bending plate 117 define a second connecting portion, and the fourth bending plate 115 is substantially perpendicular to the side plate 111, the fourth bending plate 115 is substantially perpendicular to the fifth bending plate 116, and the sixth bending plate 117 is substantially parallel to the fourth bending plate 115.

[0046] Specifically, one end of the fourth bending plate 115 is connected to the bottom end of the side plate 111, the fourth bending plate 115 extends inward, and the other end of the fourth bending plate 115 is connected to one end of the fifth bending plate 116, the fifth bending plate 116 extends upward, the other end of the fifth bending plate 116 is connected to the sixth bending plate 117, and the sixth bending plate 117 extends outward toward the side plate 111.

[0047] Therefore, the second cavity is defined by the side plate 111, the fifth bending plate 116, the sixth bending plate 117 and the fourth bending plate 115, which can effectively improve the structural strength of the end beam 11 and make the connection stability and reliability between the bottom guard plate 20 and the second connecting part higher.

[0048] Furthermore, a first flange plate 118111 is provided on the free end of the third bending plate 114, and the first flange plate 118111 extends away from the first cavity and fits with the side plate 111. A second flange plate 119111 is provided on the free end of the sixth bending plate 117, and the second flange plate 119111 extends away from the second cavity and fits with the side plate 111.

[0049] Among them, the first flange plate 118111 and the second flange plate 119111 extend toward each other and are arranged at intervals so that at least part of the stroke of the middle area of ​​the end beam 11 is a single-layer plate structure, which reduces the machining difficulty, reduces the processing cost, and ensures that the structural strength of the end beam 11 meets the use requirements.

[0050] like Figure 5 As shown, according to some embodiments of the present invention, the battery pack 100 also includes: a support plate 40, the support plate 40 is used to support the battery module, and the support plate 40 is located above the bottom guard plate 20, and the end edge of the support plate 40 is connected to the fourth bending plate 115 of the second connecting part, and / or the fifth bending plate 116.

[0051] Specifically, a connecting flange can be provided at the end of the support plate 40, and the connecting flange is welded and fixed to the fifth bending plate 116 to support the battery module through the support plate 40 and separate the bottom guard plate 20 from the battery module, to ensure that when the bottom guard plate 20 is scratched or collided, the impact energy transmitted by the bottom guard plate 20 to the accommodating space will not directly act on the battery module, so as to improve the safety and reliability of the battery pack 100.

[0052] The end of the support plate 40 may also be welded to the fourth bent plate 115 directly below the fourth bent plate 115 .

[0053] It should be pointed out that, further, a receiving groove is provided on the fifth bending plate 116 or the fourth bending plate 115, or a receiving groove is spliced ​​between the connecting flange and the fifth bending plate 116, and the receiving groove is used to receive solder.

[0054] Specifically, the fourth bending plate 115 and the fifth bending plate 116 can have an arc transition, and the connecting flange on the peripheral side of the support plate 40 has an inclined angle compared to the extension direction of the connecting plate. At least part of the connecting flange is arranged in a close fit with the fifth bending plate 116, while the other part is spaced apart from the fifth bending plate 116. The spaced apart area can be formed into a receiving groove, or a receiving groove can be directly opened on the fifth folding plate 111 or the fourth folding plate 111. During the welding process of the support plate 40 and the fifth folding plate 116 or the fourth folding plate 115, the solder can be accommodated in the receiving groove, which is convenient for welding and fixing the support plate 40 and the end beam 11, and can ensure the sealing between the two. The solder will not protrude from the lower surface of the support plate 40, and can also reduce the tolerance accumulation during the assembly process of the battery pack 100, thereby reducing the difficulty of layout.

[0055] like Figure 4 As shown, in some embodiments, the height dimensions of the first connection portion and the second connection portion are consistent, and the height dimension L1 of the first connection portion and the second connection portion and the height dimension L2 of the end beam 11 satisfy: 0.4≤L1 / L2≤0.6.

[0056] In this way, on the one hand, the height dimension of the first connecting part and the second connecting part can be avoided to be too small to ensure the structural strength of the end beam 11 and ensure strength and reliability. On the other hand, the dimension of the middle single-layer plate structure can be avoided to be too small to reduce the difficulty of setting the connector.

[0057] It should be pointed out that the structure of the end beam 11 of the embodiment of the utility model is not limited thereto. In other embodiments, the height dimensions of the first connecting portion and the second connecting portion of the end beam 11 may be different.

[0058] Furthermore, the frame 10 is constructed as a rolled steel part or an extruded aluminum profile part, such as the end beam 11 is constructed as a rolled steel part, which can reduce the difficulty of forming the frame 10, reduce the cost of the frame 10, and ensure the structural strength of the frame 10, so as to improve the structural strength of the battery pack 100.

[0059] In other words, the frame 10 can be made of rolled steel. In this way, the frame 10 can obtain strong structural rigidity and strength, and has a certain toughness and strong earthquake resistance, compression resistance, and shear resistance, which is beneficial to protecting the internal components of the battery pack 100. Alternatively, the frame 10 is an extruded aluminum profile, so that the production process of the frame 10 is simple and the production efficiency is high, and the high-strength aluminum profile has strong structural rigidity while also reducing weight, which can reduce the overall weight of the battery pack 100. According to the vehicle of the second aspect of the embodiment of the utility model, comprising: the battery pack 100 of any one of the above embodiments, the technical effects possessed are consistent with the above battery pack 100, which will not be repeated here.

[0060] It should be pointed out that the battery pack 100 in the embodiment of the present invention can be used as a power supply energy device for electrical equipment such as vehicles, and can also be formed into an energy storage device with other uses.

[0061] It is understandable that since the energy people need is highly temporal and spatial, in order to rationally use energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific form of energy based on future application needs. As we all know, to achieve the goal of carbon neutrality, green energy is currently mainly used to replace fossil energy to achieve the purpose of generating green electricity.

[0062] The current green energy mainly includes solar energy, wind energy, hydropower, etc. However, solar energy and wind energy generally have problems of strong intermittency and large volatility, which will cause unstable voltage of the green power grid (not enough electricity during peak hours and too much electricity during low hours). Unstable voltage will cause damage to electricity. Therefore, it may cause the problem of "wind and solar power abandonment" due to insufficient electricity demand or insufficient grid acceptance capacity.

[0063] To solve the problem of insufficient electricity demand or insufficient grid acceptance capacity, we must rely on energy storage devices. That is, the energy storage device converts electrical energy into other forms of energy through physical or chemical means and stores it, and then converts the energy stored in the energy storage device into electrical energy when needed. In simple terms, the energy storage device is similar to a large "power bank", which stores electrical energy when there is sufficient light energy and wind energy, and releases the stored electrical energy when needed.

[0064] At present, energy storage (i.e. energy storage) has a wide range of application scenarios, including power generation side energy storage, grid side energy storage, renewable energy grid-connected energy storage and user side energy storage. The corresponding types of energy storage devices include:

[0065] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, achieve load matching of electric energy in time and space, enhance the ability to absorb renewable energy, and are of great significance in grid system backup, relieving peak load power supply pressure, and peak and frequency regulation;

[0066] (2) The main operating mode of small and medium-sized energy storage cabinets used in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side and small household energy storage boxes used in home energy storage scenarios on the user side is "peak shaving and valley filling". Since there is a large price difference in electricity charges at peak and valley locations according to electricity demand, after users have energy storage equipment, in order to reduce costs, they usually charge the energy storage cabinets / boxes during the low electricity price period; during the peak electricity price period, the electricity in the energy storage equipment is discharged for use to achieve the purpose of saving electricity bills. In addition, in remote areas and areas prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices is equivalent to users providing themselves and the power grid with backup power, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0067] In combination with the above-mentioned situation of storing energy by physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage device may include at least one group of chemical batteries, using the chemical elements in the chemical batteries as energy storage media, so as to realize the charging and discharging process through the chemical reaction or change of the energy storage medium. In simple terms, the electric energy generated by light energy and wind energy is stored in at least one group of chemical batteries through the chemical reaction or change of the energy storage medium, and when the use of external electric energy reaches a peak, the electric energy stored in at least one group of chemical batteries is released for use through the chemical reaction or change of the energy storage medium, or transferred to places where electric energy is scarce for use.

[0068] Furthermore, the battery pack 100 and other structures and operations of the vehicle according to the embodiment of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0071] In the description of the present invention, "plurality" means two or more.

[0072] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0073] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, It is characterized in that include: frame; A bottom guard plate, the bottom guard plate is connected to the frame and is located below the frame; An upper cover, wherein the upper cover is connected to the frame and is located above the frame, and the frame, the bottom guard plate and the upper cover define an accommodating space; in The frame includes: a side beam and an end beam located at the end of the side beam, the top and bottom ends of the end beam are formed with a first connecting portion and a second connecting portion to be connected to the upper cover and the bottom guard plate respectively, and the middle area of ​​the end beam is constructed as a single-layer plate body.

2. The battery pack according to claim 1, It is characterized in that The first connection portion defines a first cavity, and the second connection portion defines a second cavity.

3. The battery pack according to claim 2, It is characterized in that The end beam includes a side plate and a plurality of bending plates, wherein the side plate and the bending plates define the first cavity and the second cavity, and the plurality of bending plates are all located on the inner side of the side plate.

4. The battery pack according to claim 3, It is characterized in that The bending plate includes a first bending plate, a second bending plate and a third bending plate connected in sequence, the first bending plate is connected to the top end of the side plate, the first bending plate, the second bending plate and the third bending plate define the first connecting portion, and the first bending plate is substantially perpendicular to the side plate, the first bending plate is substantially perpendicular to the second bending plate, and the third bending plate is substantially parallel to the first bending plate.

5. The battery pack according to claim 4, It is characterized in that The bending plate includes a fourth bending plate, a fifth bending plate and a sixth bending plate connected in sequence, the fourth bending plate is connected to the bottom end of the side plate, the fourth bending plate, the fifth bending plate and the sixth bending plate define the second connecting portion, and the fourth bending plate is substantially perpendicular to the side plate, the fourth bending plate is substantially perpendicular to the fifth bending plate, and the sixth bending plate is substantially parallel to the fourth bending plate.

6. The battery pack according to claim 5, It is characterized in that A first flanging plate is arranged on the free end of the third bending plate, the first flanging plate extends away from the first cavity and is fitted with the side plate, and a second flanging plate is arranged on the free end of the sixth bending plate, the second flanging plate extends away from the second cavity and is fitted with the side plate.

7. The battery pack according to claim 1, It is characterized in that Also includes: A support plate, the support plate is used to support the battery module, and the support plate is located above the bottom guard plate, and the end edge of the support plate is connected to the fourth bending plate and / or the fifth bending plate of the second connecting part.

8. The battery pack according to claim 7, It is characterized in that The fourth bending plate or the fifth bending plate has a containing groove, and the containing groove is used for containing solder.

9. The battery pack according to any one of claims 1 to 8, It is characterized in that The height dimensions of the first connection portion and the second connection portion are consistent, and the height dimension L1 of the first connection portion and the second connection portion and the height dimension L2 of the end beam satisfy: 0.4≤L1 / L2≤0.

6.

10. The battery pack according to claim 9, It is characterized in that The frame is constructed of rolled steel or extruded aluminum.

11. A vehicle, It is characterized in that include: The battery pack according to any one of claims 1 to 10.

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