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, and 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 an accommodating space is defined by the frame, the bottom protection plate and the upper cover; wherein the frame comprises a side beam and an end beam located at the end of the side beam, the width size of at least part of the top end and the bottom end of the side beam is larger than the width size of the middle area of the side beam, and the top end and the bottom end of the side beam are connected with the upper cover and the bottom protection plate respectively. Therefore, on one hand, the connection stability of the frame and the upper cover and the connection stability of the frame and the bottom protection plate can be improved, so that the structural strength and stability of the battery pack are improved, and on the other hand, the structural strength of the side beams is higher, and the impact resistance is higher, so that the impact resistance of the battery pack is higher, and the safety is higher.

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, the battery pack is equipped with battery modules, BDU (Chinese name: battery energy distribution unit, English name: Battery energy Distribution Unit), BMS (Chinese name: battery management system, English name: BATTERY MANAGEMENT SYSTEM) and other components. The structural strength of the battery pack frame determines the impact resistance of the battery pack, but the frame structure of the existing battery pack is difficult to meet the usage requirements. 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 with higher structural strength and stronger impact resistance.

[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, wherein the bottom guard plate is connected to the frame and is located below the frame; 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; wherein the frame includes: a side beam and an end beam located at the end of the side beam, the width dimension of at least part of the top end and the bottom end of the side beam is greater than the width dimension of the middle area of ​​the side beam, and the top end and the bottom end of the side beam are respectively connected to the upper cover and the bottom guard plate.

[0006] According to the battery pack of the embodiment of the utility model, by making the width dimensions of at least part of the top and bottom ends of the side beams larger than the width dimension of the middle area, on the one hand, the connection stability between the frame and the upper cover, and the frame and the bottom guard plate can be increased to improve the structural strength and stability of the battery pack; on the other hand, the structural strength of the side beams is higher and has stronger impact resistance, so that the battery pack has stronger impact resistance and higher safety.

[0007] According to some embodiments of the present invention, the side beam includes a first cavity, a second cavity, and a third cavity which are arranged in sequence in the height direction, and the width dimensions of the first cavity and the third cavity at the ends away from the second cavity in the height direction are greater than the width dimensions of the ends adjacent to the second cavity.

[0008] In some embodiments, the battery pack further includes: a mounting beam, the mounting beam being used to mount the battery pack to a vehicle, the mounting beam being connected to at least a plate defining the first cavity and the second cavity.

[0009] In some embodiments, the side beam includes an inner plate extending along the height direction and a plurality of bent plates, the plurality of bent plates and the inner plate define the first cavity, the second cavity and the third cavity, and the top and bottom ends of the inner plate extend obliquely toward the accommodating space.

[0010] Furthermore, the bending plate includes: a first bending plate, a second bending plate and a third bending plate connected in sequence, one end of the first bending plate is connected to the top end of the inner plate, the first bending plate is substantially perpendicular to the second bending plate, the first bending plate is substantially parallel to the third bending plate, and the first bending plate, the second bending plate, the third bending plate and the inner plate define the first cavity.

[0011] Furthermore, the bending plate also includes: a fourth bending plate, one end of the fourth bending plate is connected to the third bending plate, and the fourth bending plate is arranged in close contact with the inner plate.

[0012] Furthermore, the bending plate also includes: a fifth bending plate and a sixth bending plate connected in sequence, one end of the fifth bending plate is connected to the other end of the fourth bending plate, the fifth bending plate is substantially perpendicular to the fourth bending plate, the sixth bending plate is substantially parallel to the fourth bending plate, and the fourth bending plate, the fifth bending plate and the sixth bending plate define the second cavity.

[0013] Furthermore, the bending plate also includes: a seventh bending plate and an eighth bending plate connected in sequence, the seventh bending plate is connected to the bottom end of the inner plate, the seventh bending plate is substantially parallel to the fifth bending plate, the eighth bending plate is substantially perpendicular to the seventh bending plate, and the inner plate, the fifth bending plate, the seventh bending plate and the eighth bending plate define the third cavity.

[0014] Furthermore, the free end of the sixth bending plate has a first flanging plate, and the first flanging plate is located in the second cavity. The free end of the eighth bending plate has a second flanging plate, and the second flanging plate is located in the third cavity.

[0015] In some embodiments, the mounting beam includes: a fourth cavity and a fifth cavity, and a plate body of the fourth cavity is connected to the plates of the first cavity and the second cavity.

[0016] Furthermore, the fourth cavity is constructed as a trapezoidal cavity, and an avoidance portion is provided on the long side of the trapezoid.

[0017] Furthermore, the frame is constructed of rolled steel or extruded aluminum.

[0018] 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.

[0019] 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

[0020] 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:

[0021] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model at one angle;

[0022] Figure 2 is a schematic diagram of a battery pack according to an embodiment of the utility model from another angle;

[0023] Figure 3 is a schematic diagram of a frame according to an embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the cooperation between the side beam and the mounting beam according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Battery pack 100,

[0027] Frame 10, side beam 11, inner 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 1171, seventh bending plate 118, eighth bending plate 119, second flange plate 1191, end beam 12,

[0028] Bottom guard plate 20, upper cover 30, mounting beam 40,

[0029] The first cavity a, the second cavity b, the third cavity c, the fourth cavity d, the fifth cavity e, and the avoidance portion f. DETAILED DESCRIPTION

[0030] 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.

[0031] Reference below Figure 1-Figure 4 A battery pack 100 and a vehicle according to an embodiment of the present invention are described.

[0032] like Figure 1 and Figure 2 As 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.

[0033] It should be noted that the frame 10 is defined by two side beams 11 and two end beams 12 that are arranged opposite to each other (see Figure 3 As shown), one end of the two side beams 11 on the same side is connected to the two ends of an end beam 12, and the other end of the two side beams 11 on the same side is connected to the two ends of another end beam 12, that is, the frame 10 includes: a side beam 11 and an end beam 12 located at the end of the side beam 11, the width dimension of at least part of the top end and the bottom end of the side beam 11 is greater than the width dimension of the middle area of ​​the side beam 11, and the top end and the bottom end of the side beam 11 are respectively connected to the upper cover 30 and the bottom guard plate 20.

[0034] It can be understood that the top and bottom ends of the side beam 11 are respectively connected to the upper cover 30 and the bottom guard plate 20, and the width dimension of at least part of the top and bottom ends is larger than the width dimension measured in the middle area, so that the contact area between the upper cover 30 and the side beam 11, and between the bottom guard plate 20 and the side beam 11 can be larger. The larger contact area forms a larger connection area (such as a larger welding area), and larger-sized fasteners can be set to increase the connection strength and reliability between the upper cover 30, the frame 10 and the bottom guard plate 20. At the same time, the structural strength of the side beam 11 can be improved, and the impact resistance of the side beam 11 can be improved, so as to improve the impact resistance of the battery pack 100.

[0035] According to the battery pack 100 of the embodiment of the utility model, by making the width dimensions of at least part of the top and bottom ends of the side beam 11 larger than the width dimension of the middle area, on the one hand, the connection stability between the frame 10 and the upper cover 30, and the frame 10 and the bottom guard plate 20 can be increased to improve the structural strength and stability of the battery pack 100. On the other hand, the structural strength of the side beam 11 is higher and has stronger impact resistance, so that the battery pack 100 has stronger impact resistance and higher safety.

[0036] It should be pointed out that the width direction of the side beam 11 corresponds to the left-right direction of the vehicle, the length direction of the side beam 11 corresponds to the front-rear direction of the vehicle, and the height direction of the side beam 11 corresponds to the height direction of the vehicle. The vehicle has a driving space, and the side of the side beam 11 facing the driving space is inner, and the side away from the driving space is outer, that is, the right side plate of the left side beam 11 is the inner plate 111, and the left side plate of the right side beam 11 is the inner plate 111.

[0037] like Figure 4 As shown, according to some embodiments of the utility model, the side beam 11 includes a first cavity a, a second cavity b and a third cavity c which are arranged in sequence in the height direction, and the width dimensions of the first cavity a and the third cavity c at the ends away from the second cavity b in the height direction are greater than the width dimensions of the ends adjacent to the second cavity b.

[0038] Specifically, the two ends of the first cavity a from top to bottom in the height direction are defined as the first end and the second end respectively, and the two ends of the third cavity c from top to bottom in the height direction are defined as the third end and the fourth end respectively, the width dimension of the first end is greater than the width dimension of the second end, and the width dimension of the third end is smaller than the width dimension of the fourth end, so that the first end and the fourth end with larger width dimensions are respectively connected to the upper cover 30 and the bottom guard plate 20, thereby effectively improving the connection strength between the frame 10 and the upper cover 30, and the frame 10 and the bottom guard plate 20.

[0039] At the same time, by setting the first cavity a, the second cavity b and the third cavity c, the structural strength of the vehicle can be further improved, and the three cavities can all achieve collision energy absorption, and the impact resistance of the battery pack 100 can be further improved.

[0040] See also Figure 4 In some embodiments, the battery pack 100 further includes: a mounting beam 40, the mounting beam 40 is used to assemble the battery pack 100 to the vehicle, and the mounting beam 40 is connected to at least a plate body defining the first cavity a and the second cavity b.

[0041] Specifically, the mounting beam 40 is arranged on the outside of the side beam 11, such as the left side of the left side beam 11 and the right side of the right side beam 11, and the mounting beam 40 is connected to the first cavity a and the second cavity b at the same time. While improving the fixing stability and reliability of the mounting beam 40 on the side beam 11, the mechanical transfer path can be increased so that when the mounting beam 40 is impacted, the impact energy can be dispersed and absorbed through at least the first cavity a and the second cavity b, so as to improve the impact resistance of the battery pack 100 and improve the safety and reliability of use.

[0042] In some embodiments, the side beam 11 includes an inner plate 111 extending along the height direction and a plurality of bent plates, the plurality of bent plates and the inner plate 111 define a first cavity a, a second cavity b, and a third cavity c, and the top and bottom ends of the inner plate 111 extend obliquely toward the accommodating space.

[0043] That is to say, by bending multiple bending plates relative to the inner plate 111 to define the first cavity a, the second cavity b and the third cavity c, the structural strength of the side beam 11 is improved while the side beam 11 can be processed by rolling, stamping and other processing techniques, which can reduce the processing difficulty and processing cost of the side beam 11, thereby effectively reducing the cost of the battery pack 100.

[0044] At the same time, the top and bottom ends of the inner plate 111 are both inclined and extended inwardly, so that the width dimensions of the first end of the first cavity a and the fourth end of the third cavity c are larger, so as to achieve the technical effect of structural reinforcement.

[0045] like Figure 4 As shown, further, 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, one end of the first bending plate 112 is connected to the top of the inner plate 111, the first bending plate 112 and the second bending plate 113 are substantially perpendicular, the first bending plate 112 and the third bending plate 114 are substantially parallel, and the first bending plate 112, the second bending plate 113, the third bending plate 114 and the inner plate 111 define a first cavity a.

[0046] 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 second bending plate 113 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.

[0047] Specifically, one end of the first bending plate 112 is connected to the inner plate 111, the other end of the first bending plate 112 is connected to one end of the second bending plate 113, the other end of the second bending plate 113 is connected to the third bending plate 114, the second bending plate 113 is generally vertically arranged, the first bending plate 112 and the third bending plate 114 are generally horizontally arranged, so as to define a generally trapezoidal first cavity a through the inner plate 111, the first bending plate 112, the second bending plate 113 and the third bending plate 114. The trapezoidal first cavity a has better impact resistance, can widen the area of ​​the mechanical transfer path between the side beam 11 and the upper cover 30, improve the mechanical transfer effect, and effectively improve the impact resistance of the frame 10.

[0048] Furthermore, the bending plate further includes: a fourth bending plate 115 , one end of the fourth bending plate 115 is connected to the third bending plate 114 , and the fourth bending plate 115 is disposed in close contact with the inner plate 111 .

[0049] That is to say, one end of the third bending plate 114 is connected to the second bending plate 113, and the other end of the third bending plate 114 is connected to one end of the fourth bending plate 115, and the fourth bending plate 115 is arranged to fit the inner plate 111 so that at least part of the middle area of ​​the side beam 11 can be formed into a multi-layer plate structure (at least two layers), so as to further improve the structural strength of the side beam 11 through the multi-layer plate structure.

[0050] like Figure 4 As shown, further, the bending plate also includes: a fifth bending plate 116 and a sixth bending plate 117 connected in sequence, one end of the fifth bending plate 116 is connected to the other end of the fourth bending plate 115, the fifth bending plate 116 is substantially perpendicular to the fourth bending plate 115, the sixth bending plate 117 is substantially parallel to the fourth bending plate 115, and the fourth bending plate 115, the fifth bending plate 116, and the sixth bending plate 117 define a second cavity b.

[0051] Specifically, one end of the fifth bending plate 116 is connected to the other end of the fourth bending plate 115, and the other end of the fifth bending plate 116 is connected to one end of the sixth bending plate 117. The sixth bending plate 117 and the fourth bending plate 115 are generally vertically arranged, and the fifth bending plate 116 is generally horizontally arranged, so as to define a generally rectangular second cavity b through the fourth bending plate 115, the fifth bending plate 116, the sixth bending plate 117 and the third bending plate 114, the inner side of the second cavity b is in contact with the inner plate 111, and the top end is defined by the same plate body as the first cavity a, which simplifies the structure while further improving the impact resistance and structural strength of the side beam 11.

[0052] like Figure 4As shown, the bending plate also includes: a seventh bending plate 118 and an eighth bending plate 119 connected in sequence, the seventh bending plate 118 is connected to the bottom end of the inner plate 111, the seventh bending plate 118 is substantially parallel to the fifth bending plate 116, the eighth bending plate 119 is substantially perpendicular to the seventh bending plate 118, and the inner plate 111, the fifth bending plate 116, the seventh bending plate 118 and the eighth bending plate 119 define a third cavity c.

[0053] Specifically, one end of the seventh bending plate 118 is connected to the bottom end of the inner plate 111, the other end of the seventh bending plate 118 is connected to one end of the eighth bending plate 119, the other end of the eighth bending plate 119 extends toward the fifth bending plate 116, the eighth bending plate 119 is generally vertically arranged, and the seventh bending plate 118 is generally horizontally arranged, so as to define a first cavity a which is generally trapezoidal through the inner plate 111, the seventh bending plate 118, the eighth bending plate 119 and the fifth bending plate 116. The trapezoidal third cavity c has better impact resistance, can widen the area of ​​the mechanical transfer path between the side beam 11 and the bottom guard plate 20, improve the mechanical transfer effect, and effectively improve the impact resistance of the frame 10.

[0054] Furthermore, the free end of the sixth bending plate 117 has a first flanging plate 1171, and the first flanging plate 1171 is located in the second cavity b. The free end of the eighth bending plate 119 has a second flanging plate 1191, and the second flanging plate 1191 is located in the third cavity c.

[0055] In this way, by setting the first flange plate 1171 and the second flange plate 1191, and the first flange plate 1171 is connected to the third bending plate 114 in the second cavity b, and the second flange plate 1191 is connected to the fifth bending plate 116 in the third cavity c, so that the first cavity a, the second cavity b and the third cavity c are all formed into closed cavities, the energy impact absorption capacity is better, the impact energy can be absorbed to a greater extent, and the safety of the battery pack 100 is improved.

[0056] like Figure 4 As shown, in some embodiments, the mounting beam 40 includes: a fourth cavity d and a fifth cavity e, and the plate body of the fourth cavity d is connected to the plates of the first cavity a and the second cavity b.

[0057] Specifically, the mounting beam 40 includes: an inner beam body and a ninth bending plate, a tenth bending plate, an eleventh bending plate, a twelfth bending plate and a thirteenth bending plate, the top end of the inner beam body is connected to one end of the ninth bending plate, the ninth bending plate extends obliquely downward, and the other end is connected to one end of the tenth bending plate, the tenth bending plate is substantially vertical, and a third flange plate is formed at the other end of the tenth bending plate, the third flange plate is welded and fixed to the eleventh bending plate, the bottom end of the inner beam body is connected to one end of the eleventh bending plate, at least part of the eleventh bending plate extends obliquely downward, and the other end of the eleventh bending plate is connected to one end of the twelfth bending plate, the twelfth bending plate is substantially vertical, and the second end of the twelfth bending plate is connected to one end of the thirteenth bending plate, the thirteenth bending plate is substantially horizontal, and a fourth flange plate is provided on the other end of the thirteenth bending plate, and the fourth flange plate is connected to the tenth bending plate.

[0058] In this way, the second bending plate 113 and the sixth bending plate 117 are welded and fixed to the mounting beam 40, and by defining the fourth cavity d and the fifth cavity e, the structural strength of the mounting beam 40 is improved, the mechanical force transmission path is further enriched, the impact resistance is improved, and the connection stability and reliability between the mounting beam 40 and the vehicle body, and between the mounting beam 40 and the side beam 11 are improved.

[0059] Furthermore, the fourth cavity d is constructed as a trapezoidal cavity, and an avoidance portion f is provided on the long side of the trapezoid.

[0060] Specifically, the inner beam body, the ninth bending plate, the tenth bending plate and the eleventh bending plate at least partially define a fourth cavity d, and the fourth cavity d is generally trapezoidal, which can further improve the structural strength of the mounting beam 40. The long side of the trapezoid is defined by the inner beam body, and the middle area of ​​the inner beam body is provided with an avoidance portion f protruding toward the fourth cavity d. The avoidance portion f is used to avoid the welding area between the first cavity a and the second cavity b to reduce tolerance accumulation and improve molding accuracy.

[0061] 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.

[0062] 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 anti-seismic, anti-compression and anti-shear properties, 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. In addition, the high-strength aluminum profile has strong structural rigidity and can also reduce weight, which can reduce the overall weight of the battery pack 100.

[0063] The vehicle according to the embodiment of the second aspect of the utility model comprises: the battery pack 100 of any one of the above embodiments, and the technical effects thereof are consistent with those of the above battery pack 100, which will not be described in detail here.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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:

[0069] (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;

[0070] (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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0075] In the description of the present invention, "plurality" means two or more.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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 width dimension of at least part of the top end and the bottom end of the side beam is greater than the width dimension of the middle area of ​​the side beam, and the top end and the bottom end of the side beam are respectively connected to the upper cover and the bottom guard plate.

2. The battery pack according to claim 1, It is characterized in that The side beam includes a first cavity, a second cavity and a third cavity arranged in sequence in the height direction, and the width dimensions of the first cavity and the third cavity at the ends away from the second cavity in the height direction are greater than the width dimensions of the ends adjacent to the second cavity.

3. The battery pack according to claim 1 or 2, It is characterized in that Also includes: A mounting beam is used to assemble the battery pack to a vehicle, and the mounting beam is connected to at least a plate body defining a first cavity and a second cavity.

4. The battery pack according to claim 2, It is characterized in that The side beam includes an inner plate extending in a height direction and a plurality of bent plates, wherein the plurality of bent plates and the inner plate define the first cavity, the second cavity and the third cavity, and the top and bottom ends of the inner plate extend obliquely toward the accommodating space.

5. The battery pack according to claim 4, 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, one end of the first bending plate is connected to the top end of the inner plate, the first bending plate is substantially perpendicular to the second bending plate, the first bending plate is substantially parallel to the third bending plate, and the first bending plate, the second bending plate, the third bending plate and the inner plate define the first cavity.

6. The battery pack according to claim 5, It is characterized in that The bending plate further includes: a fourth bending plate, one end of which is connected to the third bending plate, and the fourth bending plate is arranged in close contact with the inner plate.

7. The battery pack according to claim 6, It is characterized in that The bending plate also includes: a fifth bending plate and a sixth bending plate connected in sequence, one end of the fifth bending plate is connected to the other end of the fourth bending plate, the fifth bending plate is substantially perpendicular to the fourth bending plate, the sixth bending plate is substantially parallel to the fourth bending plate, and the fourth bending plate, the fifth bending plate and the sixth bending plate define the second cavity.

8. The battery pack according to claim 7, It is characterized in that The bending plate also includes: a seventh bending plate and an eighth bending plate connected in sequence, the seventh bending plate is connected to the bottom end of the inner plate, the seventh bending plate is substantially parallel to the fifth bending plate, the eighth bending plate is substantially perpendicular to the seventh bending plate, and the inner plate, the fifth bending plate, the seventh bending plate and the eighth bending plate define the third cavity.

9. The battery pack according to claim 8, It is characterized in that The free end of the sixth bending plate has a first flanging plate, and the first flanging plate is located in the second cavity. The free end of the eighth bending plate has a second flanging plate, and the second flanging plate is located in the third cavity.

10. The battery pack according to claim 3, It is characterized in that The mounting beam comprises: a fourth cavity and a fifth cavity, and a plate body of the fourth cavity is connected to the plates of the first cavity and the second cavity.

11. The battery pack according to claim 10, It is characterized in that The fourth cavity is a trapezoidal cavity, and an escape portion is provided on the long side of the trapezoid.

12. The battery pack according to claim 1, It is characterized in that The frame is constructed of rolled steel or extruded aluminum.

13. A vehicle, It is characterized in that include: The battery pack according to any one of claims 1 to 12.

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