Battery pack and vehicle

Abstract

The present disclosure relates to a battery pack and a vehicle, and belongs to the technical field of vehicles. The battery pack comprises a tray, a plurality of battery modules, a high-voltage control component and a high-voltage connection assembly. The tray has a containing space, the plurality of battery modules and the high-voltage control component are located in the containing space and are connected with the tray, the high-voltage connection assembly is located on the upper surface of the plurality of battery modules and is connected with the upper surface, and the high-voltage connection assembly is electrically connected with the battery modules and the high-voltage control component. The high-voltage connection assembly is located on the upper surface of the battery modules, and the high-voltage connection assembly is not directly in contact with the tray. After the vehicle is in a collision, the tray is prevented from deforming and pressing the high-voltage connection assembly, the insulation shell of the high-voltage connection assembly is prevented from being damaged, and the possibility of short circuit of the battery modules, fire and explosion of the battery pack is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, in particular to a battery pack and a vehicle. BACKGROUND

[0002] In recent years, the penetration rate of new energy vehicles has been increasing year by year. As the number of new energy vehicles on the road increases, the number of new energy vehicle collision accidents also gradually increases. Compared with fuel vehicles, new energy vehicles are more likely to explode and catch fire due to the battery pack, endangering personal safety and property safety.

[0003] In the related art vehicle, the high-voltage connection assembly is usually located between the inner wall of the tray and the side wall of the battery module and is electrically connected with the battery module.

[0004] When the vehicle is hit, the tray is first subjected to external force and deforms, and then the high-voltage connection assembly is easily damaged under the extrusion of the tray, thereby causing short circuit of the battery module and causing the battery pack to catch fire. SUMMARY

[0005] The embodiments of the present disclosure provide a battery pack and a vehicle, which can solve the above technical problems existing in the related art. The technical solution is as follows:

[0006] In a first aspect, a battery pack is provided, the battery pack comprising a tray, a plurality of battery modules, a high-voltage control component, and a high-voltage connection assembly;

[0007] The tray has an accommodation space;

[0008] The plurality of battery modules and the high-voltage control component are located in the accommodation space and are connected with the tray;

[0009] The high-voltage connection assembly is located on the upper surface of the plurality of battery modules and is connected with the upper surface, and the high-voltage connection assembly is electrically connected with the battery module and the high-voltage control component.

[0010] In some embodiments, the tray comprises a tray body and a crossbeam assembly, the crossbeam assembly is connected with the tray body, and the crossbeam assembly comprises a first crossbeam, the first crossbeam extends along a first direction, wherein the first direction is perpendicular to the driving direction of the vehicle.

[0011] In some embodiments, the crossbeam assembly further comprises a plurality of second crossbeams, the second crossbeams extend along the first direction and are connected with the tray body.

[0012] In some embodiments, the cross-sectional area of the second crossbeam perpendicular to the first direction is smaller than the cross-sectional area of the first crossbeam perpendicular to the first direction.

[0013] In some embodiments, the battery pack comprises a plurality of high-voltage connection assemblies, the plurality of high-voltage connection assemblies connecting the plurality of battery modules and the high-voltage control in series.

[0014] In some embodiments, the tray body has two first side beams, the two first side beams being opposite and extending along a second direction, wherein the second direction is perpendicular to the first direction.

[0015] In some embodiments, the first side beam has an energy-absorbing cavity located on a side of the first side beam away from the battery module, the energy-absorbing cavity being used to absorb energy generated by side collision of the battery device.

[0016] In some embodiments, the cross beam assembly further comprises a pad, the pad being located between the first cross beam and the first side beam and connected to the first cross beam and the first side beam respectively, and the connection area of the pad with the first side beam being greater than the connection area of the pad with the first cross beam.

[0017] In some embodiments, the battery module has a gap with the first side beam.

[0018] In a second aspect, a vehicle is provided, the vehicle comprising the battery pack of any one of the first aspect.

[0019] The technical scheme provided by the embodiments of the present disclosure has at least the following beneficial effects:

[0020] In the embodiments of the present disclosure, the high-voltage connection assembly is located on the upper surface of the battery module, and the high-voltage connection assembly is not directly in contact with the tray. After the vehicle is in collision, the deformation of the tray extruding the high-voltage connection assembly is avoided, the damage of the insulating shell of the high-voltage connection assembly is avoided, and the possibility of short circuit of the battery module, fire and explosion of the battery pack is reduced.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description can only be some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a structural schematic diagram of a battery pack provided by the embodiments of the present disclosure;

[0024] Figure 2 is an explosion schematic diagram of a battery pack provided by an embodiment of the present disclosure;

[0025] Figure 3 is Figure 1 A-A cross-section line corresponds to a cross-sectional schematic diagram.

[0026] Reference signs:

[0027] 1, tray;

[0028] 11, tray body, 111, first side beam, 111a, energy-absorbing cavity, 112, second side beam;

[0029] 12, cross beam assembly, 121, first cross beam, 122, second cross beam, 123, cushion block;

[0030] 2, battery module;

[0031] 3, high-voltage control component;

[0032] 4, high-voltage connection assembly, 41, high-voltage connection wire harness, 42, wire harness buckle. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0034] An embodiment of the present disclosure provides a battery pack, referring to Figure 1 as shown, Figure 1 is a structural schematic diagram of a battery pack provided by an embodiment of the present disclosure, which can include a tray 1, a plurality of battery modules 2, a high-voltage control component 3 and a high-voltage connection assembly 4.

[0035] The components of the battery pack will be introduced respectively as follows:

[0036] 1. Tray 1

[0037] The tray 1 has a containing space, which can be used to contain the battery module 2, the high-voltage control component 3, the high-voltage connection assembly 4 and other elements. The shape and size of the containing space of the tray 1 are not specifically limited by the present disclosure, which can be matched and set according to the battery capacity demand of the vehicle, the size and shape of the vehicle frame and other factors.

[0038] The tray 1 can include a tray body 11 and a cross beam assembly 12.

[0039] 1.1. Tray body 11

[0040] 1.1.1. First side beam 111

[0041] The tray body 11 can have two first side beams 111 that are opposite and extend along a second direction, wherein the second direction is perpendicular to the first direction, that is, the second direction is parallel to the driving direction of the vehicle.

[0042] The material of the first side beam 111 is not limited in the present disclosure, and can be matched and set according to factors such as the structural strength of the battery pack, the safety factor of the vehicle, etc. For example, high-strength steel, aluminum alloy, etc. The present disclosure takes the first side beam 111 as an example of high-strength steel material. The high-strength steel has good strength and corrosion resistance. When the vehicle is subjected to side impact, the first side beam 111 is subjected to a large amount of impact energy. The first side beam 111 made of high-strength steel material can improve the extrusion resistance of the battery pack and enhance the safety and stability of the battery pack structure.

[0043] The first side beam 111 has an energy-absorbing cavity 111a located on the side of the first side beam 111 away from the battery module 2. The energy-absorbing cavity 111a is used to absorb the energy generated by the side impact of the battery device.

[0044] The energy-absorbing cavity 111a is a structure that can effectively absorb energy and reduce the transmission of impact or vibration. The energy-absorbing cavity 111a has a pre-set geometric shape, such as a corrugated shape, a honeycomb shape, or a multi-layer structure, etc. These pre-set geometric shapes can effectively guide the propagation path of the impact force, causing it to reflect and diffuse multiple times within the structure, thereby achieving energy absorption and dispersion.

[0045] The energy-absorbing cavity 111a is usually made of lightweight and ductile materials such as foamed metal, composite materials, rubber, etc. These materials can plastically deform or break when impacted, thereby absorbing a large amount of impact energy.

[0046] The energy-absorbing cavity 111a can also have a multi-layer structure, with each layer being fixed together by a certain connection method (such as welding, riveting, etc.). The propagation of impact energy in the multi-layer structure is absorbed and dispersed multiple times, so this multi-layer structure can further improve the energy-absorbing performance of the energy-absorbing cavity 111a.

[0047] The specific internal structure of the energy-absorbing cavity 111a is not limited in the present disclosure, and the geometric size, material density, and connection method of the energy-absorbing cavity 111a can be matched and set according to factors such as the length and height of the first side beam 111, the accommodation space of the tray 1 in the vehicle, etc.

[0048] When the vehicle is subjected to side impact, the energy-absorbing cavity 111a located on the side of the first side beam 111 opposite the external environment of the vehicle can absorb most of the energy from the external impact, reducing the deformation of the first side beam 111 and reducing the extrusion of the first side beam 111 on the battery module 2 and the high-voltage connection assembly 4.

[0049] 1.1.2. Second side beam 112

[0050] The tray body 11 can further have two second side beams 112, which are opposite and extend along a first direction, wherein the first direction is perpendicular to the driving direction of the vehicle. The second side beams 112 are connected with the first side beams 111 and define a containing space of the tray 1.

[0051] The material of the second side beams 112 is not limited in the present disclosure, and can be selected according to the structural strength requirement of the battery pack of the vehicle, the mass of the battery pack, the manufacturing cost, and the like. For example, high-strength steel, aluminum alloy, high-strength plastic, and the like.

[0052] The connection manner of the second side beams 112 and the first side beams 111 is not limited in the present disclosure, and can be set according to the material properties of the second side beams 112 and the first side beams 111, the structural strength requirement of the battery pack, and the like. For example, welding, riveting, threaded fastening connection, and the like; for example, integrated casting, and the like.

[0053] 1.2. Cross beam assembly 12

[0054] The cross beam assembly 12 is located in the internal region of the tray body 11 and is connected with the tray body 11. The cross beam assembly 12 can further improve the structural strength and impact resistance of the tray 1, reduce the risk of extrusion of the related elements (for example, the battery module 2, the high-voltage connection assembly 4, and the like) in the tray 1, and reduce the influence of the collision of the vehicle on the normal function of the internal elements of the battery pack.

[0055] 1.2.1. First cross beam 121

[0056] The cross beam assembly 12 can include a first cross beam 121, which extends along a first direction, wherein the first direction is perpendicular to the driving direction of the vehicle.

[0057] The first cross beam 121 is made of a material with relatively high strength, for example, metal or composite material. The present embodiment takes the first cross beam 121 made of aluminum alloy as an example for illustration. The first cross beam 121 made of aluminum alloy can effectively enhance the structural strength of the two first side beams 111 arranged oppositely, and play a good supporting role on the space between the two first side beams 111. At the same time, the mass of the aluminum alloy material is relatively light, and the first cross beam 121 made of aluminum alloy is conducive to the lightweight design pursuit of the battery pack, and reduces the energy consumption of the vehicle driving.

[0058] The number of the first cross beams 121 is not limited in the present disclosure, and can be matched and set according to the extension length of the first side beams 111 in the second direction, the structural strength requirement of the tray 1 and other factors. For example, the number of the first cross beams 121 is one, the first cross beam 121 is connected with the center point of the first side beam 111 in the second direction, the first cross beam 121 and the two second side beams 112 are uniformly distributed on the first side beam 111 in the second direction, and the first cross beam 121 and the two second side beams 112 jointly support the space between the two first side beams 111.

[0059] The relative position of the first cross beam 121 and the battery module 2 is not limited in the present disclosure. For example, the first cross beam 121 can be located below, above or between the adjacent two battery modules 2. The present embodiment is described by taking the first cross beam 121 located between the adjacent two battery modules 2 as an example.

[0060] The first cross beam 121 can be located between the adjacent two battery modules 2, which can play a role of isolation to separate the adjacent battery modules 2, reduce the influence of the fire or explosion of one battery module 2 on the adjacent battery module 2, and reduce the possibility or speed of the spread of the fire or explosion of the battery pack.

[0061] The first cross beam 121 located between the adjacent two battery modules 2 can help the heat transfer between the battery modules 2 or inside the battery pack, timely transfer the heat inside the battery pack to the air environment, and improve the working efficiency and safety of the battery pack. At the same time, the first cross beam 121 located between the adjacent two battery modules 2 can also reduce the vibration transmission between the battery modules 2, reduce the noise generated by the vibration, and improve the vehicle ride comfort.

[0062] 1.2.2. Second Cross Beam 122

[0063] The cross beam assembly 12 can further include a plurality of second cross beams 122, the second cross beams 122 extending along the first direction and connected with the tray body 11, the second cross beams 122 and the first cross beams 121 are arranged in parallel, and the second cross beams 122 and the first cross beams 121 jointly support the space between the two first side beams 111.

[0064] The second cross beam 122 is made of a material with high strength, such as metal or composite material. The present embodiment is described by taking the second cross beam 122 made of aluminum alloy as an example. The second cross beam 122 made of aluminum alloy can effectively enhance the structural strength of the two first side beams 111 arranged oppositely, and well support the space between the two first side beams 111. At the same time, the aluminum alloy material has a lighter quality, and the second cross beam 122 made of aluminum alloy is conducive to the lightweight design of the battery pack and reduces the energy consumption of the vehicle driving.

[0065] The number of the second cross beams 122 is not specifically limited in the present disclosure, and can be matched and set according to the extension length of the first side beams 111 in the second direction, the structural strength requirement of the tray 1, the number of the first cross beams 121, and other factors. For example, the number of the second cross beams 122 is two, the two second cross beams 122 are symmetrically distributed relative to the first cross beams 121, and the second cross beams 122 and the first cross beams 121 jointly support the space between the two first side beams 111, so as to reduce the stress concentration phenomenon and avoid the adverse phenomena such as cracks or even breakage at the connection between the first cross beams 121 and the first side beams 111 due to stress concentration.

[0066] The relative position of the second cross beam 122 and the battery module 2 is not specifically limited in the present disclosure. For example, the second cross beam 122 can be located below, above, or between the adjacent two battery modules 2. The embodiment of the present disclosure is described with the second cross beam 122 located between the adjacent two battery modules 2. The second cross beam 122 can be located between the adjacent two battery modules 2, and at this time, the second cross beam 122 can also play a role of isolation, separating the adjacent battery modules 2, so as to reduce the influence of the fire or explosion of one battery module 2 on the adjacent battery module 2, and reduce the possibility or speed of the spread of the battery pack fire or explosion.

[0067] In some embodiments, the cross-sectional area of the second cross beam 122 perpendicular to the first direction is smaller than the cross-sectional area of the first cross beam 121 perpendicular to the first direction. The cross-sectional area of the second cross beam 122 is smaller, the material consumption of the second cross beam 122 is less than that of the first cross beam 121, the mass of the second cross beam 122 is lighter, and the manufacturing cost is lower. In the case of meeting the overall structural strength of the tray 1, on the one hand, it is helpful to pursue the lightweight design of the tray 1, and on the other hand, it reduces the manufacturing cost of the battery pack.

[0068] 1.2.3. Pad 123

[0069] The cross beam assembly 12 can further include a pad 123, which can be located between and connected to the first cross beam 121 and the first side beam 111. The connection area of the pad 123 and the first side beam 111 is greater than the connection area of the pad 123 and the first cross beam 121.

[0070] Compared with the structure directly connected with the first cross beam 121 and the first side beam 111, the setting of the cushion block 123 increases the connection area of the first cross beam 121 and the first side beam 111, the increase of the connection area can reduce the contact stress of the connection part of the first cross beam 121 and the first side beam 111, reduce the local stress concentration, make the connection of the two more firm and reliable, reduce the local deformation and wear of the connection part, prolong the service life of the first cross beam 121 and the first side beam 111.

[0071] The cushion block 123 can also be located between the second cross beam 122 and the first side beam 111, and connected with the second cross beam 122 and the first side beam 111 respectively. The connection area of the cushion block 123 with the first side beam 111 is greater than the connection area of the cushion block 123 with the second beam. The principle is similar to that of the above-mentioned embodiment, which will not be described in detail here.

[0072] 2. Battery module 2

[0073] A plurality of battery modules 2 are located in the accommodation space of the tray 1 and are connected with the tray 1. The number, size and shape of the battery module 2 are not limited in the present disclosure, and can be matched and set according to the battery capacity requirement of the vehicle, the size and shape of the accommodation space and other parameters.

[0074] The specific connection mode of the battery module 2 and the tray 1 is not limited in the present disclosure, and can be matched and selected according to the geometric parameters of the battery module 2, the connection strength requirement and other factors. For example, bolt connection, the battery module 2 has a bolt or nut pre-installed on the bottom thereof, the bolt or nut is aligned with the corresponding screw hole on the tray 1, and the battery module 2 is firmly fixed on the tray 1 by using the bolt or nut. The bolt connection can provide strong connection force, and is suitable for battery pack application occasions requiring greater stability and reliability. For another example, clamping fixation, the tray 1 has a clamping structure (for example, a clamping strip or a clamping frame), the battery module 2 is placed on the tray 1, and then the battery module 2 is clamped and fixed on the tray 1 by using the clamping structure. The clamping fixation operation is relatively simple, and is suitable for battery pack application occasions requiring quick installation and disassembly.

[0075] The battery module 2 and the first side beam 111 have a gap, which is usually greater than or equal to 70 mm. The safety gap can ensure that the first side beam 111 has a certain deformation space, so as to avoid that when the first side beam 111 is tightly attached to the battery module 2, the external collision energy can be effectively transmitted to the battery module 2 from the first side beam 111, thereby causing damage to the inside of the battery module 2 and causing adverse phenomena such as fire and explosion.

[0076] 3. High-voltage control member 3

[0077] The high-voltage control member 3 is located in the accommodating space and connected with the tray 1. The main function of the high-voltage control member 3 is to protect the battery module 2. In the event of a vehicle collision or other emergency, the high-voltage control member 3 quickly disconnects the battery module 2 from the vehicle electrical system to prevent the electrical system from continuing to operate and causing the battery module 2 to short circuit and the temperature to rise sharply, thereby reducing the risk of fire, explosion or other safety risks. In addition, the high-voltage control member 3 can also be used to control the electrical system of the vehicle, for example, disconnecting the battery module 2 from the main circuit system when the vehicle is parked to prevent the battery module 2 from being depleted.

[0078] The internal elements of the high-voltage control member 3 are not specifically limited in the present disclosure and can be matched and set according to the functional requirements of the high-voltage control member 3 in different battery packs of vehicles. The internal elements can be relays, fuses, pre-charge resistors, current sensors, etc.

[0079] 4. High-voltage connection assembly 4

[0080] The high-voltage connection assembly 4 is located on the upper surface of the plurality of battery modules 2 and is connected with the upper surface. When the vehicle collides (especially side collision), the first side beam 111 and the second side beam 112 in the frame-related area and the tray body 11 are first impacted by external energy, and after a certain deformation of the first side beam 111 and the second side beam 112, the battery module 2 is extruded. When the battery module 2 is extruded to a certain extent, the high-voltage connection assembly 4 on the upper surface of the battery module 2 will break due to pulling, extruding, friction, etc., thereby causing the battery module 2 to short circuit, the temperature to rise rapidly, and thus causing the battery pack to catch fire or explode, etc. dangerous accident. Compared with the scheme that the high-voltage connection assembly 4 is located between the first side beam 111, the second side beam 112 and the side wall of the battery module 2, the embodiment of the present disclosure can reduce the risk of damage to the high-voltage connection assembly 4, thereby avoiding the temperature rise of the battery module 2 due to short circuit causing the battery pack to catch fire or explode, etc. dangerous accident.

[0081] The high-voltage connection assembly 4 is electrically connected with the battery module 2 and the high-voltage control member 3, thereby realizing the control of the high-voltage control member 3 on the state of the plurality of battery modules 2.

[0082] The battery pack can include a plurality of high-voltage connection assemblies 4, and the plurality of high-voltage connection assemblies 4 connect the plurality of battery modules 2 and the high-voltage control member 3 in series. The connection position of the high-voltage connection assembly with the battery module 2 and the high-voltage control member 3 is not specifically limited in the present disclosure and can be matched and set according to the port of the battery module 2, the relative position of the battery module 2 and the high-voltage control member 3 in the accommodating space of the tray 1, etc.

[0083] The high-voltage connection assembly 4 can include a high-voltage connection wire harness 41 and a wire harness buckle 42.

[0084] The high-voltage connection wire harness 41 can include wires and insulation wrapped outside the wires, the wires having good electrical conductivity to ensure that high-voltage current can be safely and stably transmitted to drive the motor and other high-voltage equipment. The insulation is made of materials with high voltage resistance, high temperature resistance, and wear resistance, and can maintain good insulation performance and mechanical strength in high-voltage, high-temperature, and high-pressure environments, such as cross-linked polyolefin (XLPE), fluoroplastic (such as polytetrafluoroethylene PTFE), silicone rubber, polyimide (PI), and the like.

[0085] In some embodiments, the wire harness buckle 42 can be a sliding buckle, the high-voltage connection wire harness 41 is located in the limiting ring of the sliding buckle, the sliding buckle has a protruding part, the upper surface of the battery module 2 has a pre-designed sliding groove, the protruding part of the sliding buckle cooperates with the sliding groove on the upper surface of the battery module 2 to realize the movement of the sliding buckle along the sliding groove within a pre-designed range. The sliding buckle can avoid the displacement of the high-voltage connection wire harness 41 segment located between two adjacent wire harness buckles 42 due to the pulling of one or some intermediate segments, causing the extrusion of the wire harness buckle 42 and the high-voltage connection wire harness 41, damaging the insulation in the contact area of the wire harness buckle 42, exposing the wires inside the insulation, and causing the battery module 2 to short circuit after the exposed wires contact with metal elements, rapidly rising the temperature inside the battery module 2, and causing dangerous accidents such as fire or explosion of the battery pack.

[0086] In some embodiments, the wire harness buckle 42 can be a broken buckle, which can actively break or break when subjected to a predetermined external force to release the connected components. In the embodiments of the present disclosure, the high-voltage connection wire harness 41 is located in the limiting ring of the broken buckle, and the broken buckle is connected to the upper surface of the battery module 2. When the vehicle is driving normally, the external force acting on the broken buckle is lower than the pre-designed external force value, the broken buckle limits the displacement of the high-voltage connection wire harness 41, and avoids the generation of adverse phenomena such as friction and vibration of the high-voltage connection wire harness 41; when the vehicle is subjected to a collision, the impact force acting on the broken buckle is higher than or equal to the pre-designed external force value, the breaking point of the broken buckle actively breaks, the broken buckle is separated from the upper surface of the battery module 2, and the high-voltage connection wire harness 41 can be deformed or displaced under the action of the external force, thereby avoiding the damage of the insulation.

[0087] In some embodiments, the upper surface of the battery module 2 has a preset sliding groove with a plurality of matching sliding blocks, and the wire harness buckle 42 is a broken buckle connected with the sliding blocks. Taking a segment of the high-voltage connection wire harness 41 parallel to the first direction as an example, when this segment of the high-voltage connection wire harness 41 is subjected to an external force parallel to the first direction, the sliding blocks can carry the broken buckle and the high-voltage connection wire harness 41 to slide within a preset distance, and when this segment of the high-voltage connection wire harness 41 is subjected to an external force perpendicular to the first direction, the breaking point of the broken buckle is actively broken, the broken buckle is separated from the sliding blocks, and the high-voltage connection wire harness 41 can be deformed or displaced under the action of the external force, thereby avoiding damage to the insulating member.

[0088] In some embodiments, the wire harness buckle 42 can be an unlocking buckle with an unlocking structure that can be triggered by mechanical or electrical means. In the embodiments of the present disclosure, the high-voltage connection wire harness 41 is located in the limiting ring of the unlocking buckle, the unlocking buckle is connected with the upper surface of the battery module 2, and the unlocking mechanism can be triggered under certain conditions, for example, the side wall of the battery module 2 has a pressure sensor, when the output value of the pressure sensor is greater than a preset value, that is, when the first side beam 111 and / or the second side beam 112 of the tray body 11 exerts a significant extrusion force on the battery module 2, the unlocking mechanism is triggered, and after unlocking, the unlocking buckle is separated from the upper surface of the battery module 2, and the high-voltage connection wire harness 41 can be deformed or displaced under the action of the external force, thereby avoiding damage to the insulating member.

[0089] Based on the same concept, the embodiments of the present disclosure also provide a vehicle, which can include the battery pack according to any one of the above embodiments.

[0090] The battery pack can be located in the passenger compartment bottom area of the vehicle and connected with the frame of the vehicle. In the case of front collision and rear collision of the vehicle, due to the energy absorption effect of the frame (especially the A-pillar, C-pillar) and the corresponding structure of the chassis, the damage of the external impact on the battery pack can be greatly reduced, the deformation degree of the tray 1 is smaller, and the risk of short circuit and fire of the battery module 2 is also smaller.

[0091] In the case of side collision of the vehicle, the vehicle is mainly absorbed by the B-pillar in the frame and the corresponding structure of the door, and the energy absorption capacity of the two is smaller than that of the A-pillar, C-pillar and the corresponding structure of the chassis, and the battery pack itself will also bear a large impact energy, and the first side beam 111 of the tray body 11 is prone to large deformation.

[0092] In the first aspect, the high-voltage connecting assembly 4 in the embodiments of the present disclosure is located on the upper surface of the battery module 2. Compared with the structure in the related art in which the high-voltage connecting assembly 4 is located on the first side beam 111 and the side wall of the battery module 2, the possibility of extrusion of the high-voltage connecting assembly 4 by the deformation of the first side beam 111 is reduced, and thus the damage of the insulating shell of the high-voltage connecting assembly 4 is reduced, and the adverse phenomena such as fire and explosion of the battery module 2 caused by short circuit are reduced.

[0093] In the second aspect, the first side beam 111 has a corresponding energy-absorbing cavity 111a. When the vehicle is subjected to side collision, the energy-absorbing cavity 111a can absorb a large part of the energy, and the intrusion of the internal accommodating space of the tray 1 by the deformation of the first side beam 111 is reduced.

[0094] In the third aspect, the tray 1 has a cross beam assembly 12. The extension directions of the first cross beam 121 and the second cross beam 122 are perpendicular to the extension direction of the first side beam 111, and the first cross beam 121 and the second cross beam 122 are connected to the first side beam 111. The two sections of the first cross beam 121 and the second cross beam 122 can also have a pad 123, which increases the connection area of the first cross beam 121 and the second cross beam 122 with the first side beam 111, enhances the mechanical strength of the tray 1 itself, and reduces the influence of external impact on the tray 1.

[0095] In the fourth aspect, the inner wall of the tray body 11 and the battery module 2 have a safety gap, and the first side beam 111 has a certain deformation space. When the first side beam 111 is in close contact with the battery module 2, the energy of external collision can be effectively transmitted from the first side beam 111 to the battery module 2, and thus the internal damage of the battery module 2 occurs, and adverse phenomena such as fire and explosion occur.

[0096] The type of the vehicle is not limited in the present disclosure, for example, a sedan, a passenger car, a truck, a sport utility vehicle (SUV), etc.

[0097] Figure 1 The battery pack shown in the figure is described by taking a vehicle as a Blade Electric Vehicle (BEV or EV) as an example, but the present disclosure is not limited thereto. The battery pack can also be applied in a Hybrid Electric Vehicle (HEV), for example, a range extender, a plug-in, etc.

[0098] The vehicle further comprises a motor electrically connected with the battery module 2. The number and arrangement of the motor in the vehicle are not specifically limited in the present disclosure, and can be matched and set according to the use scene, functional requirements and other factors of different vehicles. For example, the number of the motor can be two, corresponding to the front wheel and the rear wheel of the vehicle respectively, thereby realizing the four-wheel drive function of the vehicle; for example, the number of the motor can be four, and the motor is a hub motor, each hub motor corresponding to a wheel of the vehicle, the hub motor can be directly connected to the wheel and provide driving force by rotating the wheel, and such a direct drive design eliminates the transmission device (such as a transmission shaft, a transmission belt, etc.) in the traditional transmission system, reduces energy loss, and improves energy utilization efficiency.

[0099] In the description of the present specification, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description 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 appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0100] It can be understood that "multiple" in the present disclosure means two or more, and other quantifiers are similar. The association relationship of the associated objects is described, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B, and the existence of B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it. The singular form of "a", "said" and "the" is also intended to include the plural form, unless the context clearly indicates otherwise.

[0101] It can be further understood that the terms "first", "second", and the like are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions of "first", "second", and the like can be used interchangeably. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present disclosure.

[0102] It should be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicate directions or positions on the drawings or positions relative to those shown in the drawings, and are used to facilitate the description of the embodiments and are not intended to limit or confine the scope of the application to the positions illustrated. In the present application, unless otherwise clearly specified and limited, a first feature is "on", "above", or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over", and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature "below", "under", and "under" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal height than the second feature.

[0103] It should be further understood that, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection or can communicate with each other; it can be direct connection between the two, or indirect connection through an intermediate medium, or internal communication between two elements or interaction between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0104] It should be further understood that although the operations in the embodiments of the present disclosure are described in a specific order in the drawings, it should not be understood as requiring the specific order or serial order shown to perform the operations, or requiring all the operations shown to obtain the desired results. In a particular environment, multitasking and parallel processing can be advantageous.

[0105] Other embodiments of the present disclosure will be apparent to those skilled in the art upon consideration of the specification and practice of the concepts disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the application following the general principles thereof and including such departures from the present disclosure as come within known or customary practice in the art to which the present disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the scope of the claims.

[0106] It should be understood that the present disclosure is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present disclosure. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery pack, characterized by, The battery pack comprises a tray (1), a plurality of battery modules (2), a high-voltage control component (3) and a high-voltage connection assembly (4); The tray (1) has a containing space, and comprises a tray body (11) and a crossbeam assembly (12) connected with the tray body (11), wherein the crossbeam assembly (12) comprises a first crossbeam (121) extending along a first direction and a cushion block (123). The tray body (11) has two first side beams (111) opposite to each other and extending along a second direction perpendicular to the first direction, and the first side beam (111) has an energy-absorbing cavity (111a) on a side thereof away from the battery module (2) for absorbing energy generated by side collision of the battery device. The cushion block (123) is located between the first crossbeam (121) and the first side beam (111) and connected with the first crossbeam (121) and the first side beam (111) respectively, and the connection area of the cushion block (123) with the first side beam (111) is greater than the connection area of the cushion block (123) with the first crossbeam (121). The plurality of battery modules (2) and the high-voltage control component (3) are located in the containing space and connected with the tray (1). The high-voltage connection assembly (4) is located on an upper surface of the plurality of battery modules (2) and connected with the upper surface, and the high-voltage connection assembly (4) is electrically connected with the battery module (2) and the high-voltage control component (3).

2. The battery pack according to claim 1, wherein The crossbeam assembly (12) further comprises a plurality of second crossbeams (122) extending along the first direction and connected with the tray body (11).

3. The battery pack according to claim 2, wherein The cross-sectional area of the second crossbeam (122) perpendicular to the first direction is smaller than the cross-sectional area of the first crossbeam (121) perpendicular to the first direction.

4. The battery pack according to claim 1, wherein The battery pack comprises a plurality of high-voltage connection assemblies (4) connecting the plurality of battery modules (2) and the high-voltage control component (3) in series.

5. The battery pack according to claim 1, wherein The battery module (2) has a gap with the first side beam (111).

6. A vehicle characterized by comprising: The vehicle comprises the battery pack according to any one of claims 1-5.

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