Battery and vehicle

Abstract

The invention discloses a battery and a vehicle. The battery comprises at least one battery monomer, a box body and a buffer structure, the single batteries are arranged in the box body; the buffer structure is fixedly connected to the box body and protrudes out of the side wall of the box body. According to the battery disclosed by the embodiment of the invention, when the peripheral side of the battery is collided, the buffer structure is subjected to acting force and can absorb part of collision energy, so that the acting force transmitted to the box body is reduced, the possibility that the box body is damaged under the stress condition can be reduced, and the safety and reliability of the battery are improved; and the influence on the service life of the battery is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery and a vehicle. Background Art

[0002] In the related art, when the outer peripheral side of the battery is hit or scratched, the battery is easily damaged, which affects the working performance of the battery, reduces the safety and reliability of the battery, and affects the service life of the battery. Summary of the invention

[0003] The present invention provides a battery and a vehicle. When the outer peripheral side of the battery is hit by a collision, the buffer structure can absorb part of the collision energy, thereby reducing the possibility of the battery being damaged by force, thereby improving the safety performance of the battery.

[0004] In a first aspect, the present invention provides a battery, comprising: at least one battery cell; a box body, wherein the battery cells are all disposed in the box body; and a buffer structure fixedly connected to the box body and protruding from a side wall of the box body.

[0005] In the above technical solution, the buffer structure is fixedly connected to the box body, and the buffer structure protrudes from the side wall of the box body. When the outer peripheral side of the battery is subjected to a collision, the buffer structure is subjected to a force, and the buffer structure can absorb part of the collision energy, so that the force transmitted to the box body becomes smaller, which can reduce the possibility of the box body being damaged when subjected to force, thereby improving the safety and reliability of the battery and reducing the impact on the service life of the battery.

[0006] In some embodiments, the box body includes a box body main body and a bottom plate, the box body main body and the bottom plate are fixedly connected, a receiving cavity is formed between the box body main body and the bottom plate, and the at least one battery cell is arranged in the receiving cavity; the buffer structure is fixedly connected to the bottom plate.

[0007] In the above technical solution, the buffer structure is fixedly connected to the bottom plate, and the buffer structure protects the bottom plate. When the outer peripheral side of the box body is hit, the buffer structure is subjected to force and absorbs part of the collision energy, and the force applied to the bottom plate is smaller, which can reduce the possibility of the bottom plate being damaged by force.

[0008] In some embodiments, the buffer structure includes a connecting portion and a buffer portion, the connecting portion is fixedly connected between the bottom plate and the buffer portion, the buffer portion and the side wall of the box body are arranged opposite to each other, and a buffer space for deformation of the buffer portion is formed between the buffer portion and the side wall of the box body.

[0009] In the above technical solution, a buffer space for deformation of the buffer part is formed between the buffer part and the side wall of the box body. When the outer peripheral side of the battery is subjected to a collision, the buffer part is subjected to a force, and the deformation of the buffer part can absorb part of the collision energy. In this way, the force transmitted to the box body becomes smaller, which can reduce the possibility of the box body being damaged when subjected to force, thereby further improving the safety and reliability of the battery and reducing the impact on the service life of the battery.

[0010] In some embodiments, a direction perpendicular to the side wall is a width direction of the buffer space, and the width of the buffer space is 5 to 30 mm.

[0011] In the above technical solution, the width of the buffer space is not less than 5 mm, so that the buffer space can absorb more collision energy and better protect the box body; in addition, the width of the buffer space is not more than 30 mm, while ensuring the energy absorption effect of the buffer space, it also helps to reduce the volume of the battery and reduce the space occupied by the battery.

[0012] In some embodiments, the direction perpendicular to the bottom plate is the height direction of the buffer space, and the height of the buffer space is 5 to 30 mm.

[0013] In the above technical solution, the height of the buffer space is not less than 5 mm, so that the protective height of the buffer structure is higher, the buffer structure can protect the box body in a larger range, and further reduce the possibility of the box body being damaged by force; the height of the buffer space is not more than 30 mm, while increasing the protection range of the buffer structure for the box body, it also helps to reduce the material used in the buffer structure, which helps to reduce the overall weight of the battery.

[0014] In some embodiments, the connecting portion extends in an arc shape in a direction from the buffer portion to the bottom plate.

[0015] In the above technical solution, when the outer peripheral side of the battery is hit, the buffer part is subjected to force and absorbs part of the collision energy, and the connecting part can transfer the force applied to the buffer part to the bottom plate, so that the force applied to the box body is small, which can reduce the possibility of damage to the box body. In addition, the arc-shaped connecting part also has a guiding function. When the buffer structure is hit, the connecting part can guide the collision position to the bottom plate to reduce the degree of damage to the box body.

[0016] In some embodiments, the buffer structure and the bottom plate are an integrally formed structure.

[0017] In the above technical solution, the buffer structure and the base plate are integrally formed, which can enhance the stability of the overall structure and performance of the buffer structure and the base plate, and can save unnecessary assembly parts and connection processes, which is beneficial to improving the assembly efficiency of the battery.

[0018] In some embodiments, the box body and the bottom plate are fixedly connected via a connecting structure, and the connecting structure is detachably connected to the box body and the bottom plate.

[0019] In the above technical solution, the connection structure is detachably connected to the box body and the bottom plate, which facilitates the disassembly and assembly between the box body and the bottom plate; when the bottom plate is severely deformed or damaged, it is convenient to remove the bottom plate for maintenance and replacement, and it is also convenient to maintain the box body and the battery cell.

[0020] In some embodiments, a threaded hole is formed on the box body, a through hole is formed on the bottom plate, and the connecting structure is a screw. The connecting structure passes through the through hole and is screwed to the box body through the threaded hole.

[0021] In the above technical solution, the bottom plate can be fixedly connected to the box body through the threaded connection between the connection structure and the box body, and can be easily disassembled, further improving the convenience of battery maintenance.

[0022] In some embodiments, the head of the connecting structure protrudes from the bottom surface of the bottom plate, the direction perpendicular to the bottom plate is the height direction of the connecting structure, and the height dimension of the head is less than or equal to 6 mm.

[0023] In the above technical solution, by making the height dimension of the head of the connecting structure no greater than 6 mm, when the battery is subjected to a collision, the possibility of the connecting structure being squeezed by the collision can be reduced, thereby reducing the possibility of battery damage caused by deformation of the connecting structure after being subjected to the force, thereby further improving the safety and reliability of the battery.

[0024] In some embodiments, the box body includes a side beam constituting the side wall, a hollow cavity is formed in the side beam, a connecting nut is provided in the hollow cavity, the connecting nut is formed with the threaded hole, a mounting hole connected to the hollow cavity is formed on the bottom surface of the side beam, and the connecting nut is riveted to the side beam through the mounting hole.

[0025] In the above technical solution, the connecting nut is riveted to the side beam through the mounting hole, which is convenient for operation and makes the connection between the connecting nut and the side beam have strong connection stability. The stability of the connection between the bottom plate and the box body can be further enhanced by threading the connecting structure with the connecting nut.

[0026] In some embodiments, a first seal is provided between the bottom surface of the box body and the bottom plate.

[0027] In the above technical solution, the first sealing member can enhance the sealing between the bottom surface of the box body and the bottom plate, thereby enhancing the air tightness of the battery and further improving the safety of the battery.

[0028] In some embodiments, the buffer structure forms an avoidance gap, and the avoidance gap is used to avoid the installation structure of the battery.

[0029] In the above technical solution, the avoidance notch avoids the installation structure of the battery, making the installation of the battery more convenient and easy to operate; for example, when the battery is installed on the vehicle body, the avoidance notch can avoid the installation structure connecting the battery and the vehicle body, making it convenient to disassemble and assemble the battery on the vehicle body.

[0030] In some embodiments, the battery cells are spaced apart from a side wall of the case.

[0031] In the above technical solution, the side wall of the box is separated from the battery cell, so that the transmission of the force between the side wall of the box and the battery cell can be blocked. For example, when the side wall of the box is subjected to a collision force, the side wall of the box is not easy to transmit the collision force to the battery cell, which can improve the safety of the battery cell; and the side wall of the box is separated from the battery cell, so that the side wall of the box has deformation space. When the side wall of the box is deformed by force, the possibility of the side wall of the box squeezing the battery cell can be reduced, which can further improve the safety and reliability of the battery.

[0032] In some embodiments, the box body includes a box body main body and a bottom plate, the box body main body and the bottom plate are fixedly connected, a receiving cavity is formed between the box body main body and the bottom plate, the at least one battery cell is arranged in the receiving cavity, and the bottom surface of the battery cell is spaced apart from the bottom plate.

[0033] In the above technical solution, the bottom surface of the battery cell is separated from the bottom plate, and a buffer energy-absorbing space is provided between the bottom plate and the battery cell. When the bottom plate is subjected to a force, the bottom plate can be deformed to absorb part of the energy. The buffer energy-absorbing space can absorb part of the collision energy, thereby reducing the possibility of the bottom plate squeezing the battery cell, thereby further improving the safety of the battery cell.

[0034] In some embodiments, the distance between the bottom surface of the battery cell and the bottom plate is 10-25 mm.

[0035] In the above technical solution, by ensuring that the spacing between the bottom surface of the battery cell and the bottom plate is not less than 10 mm, sufficient deformation space can be left for the bottom plate to reduce the possibility of squeezing the battery cell when the bottom plate is deformed under force, thereby improving the safety of the battery cell; by ensuring that the spacing between the bottom surface of the battery cell and the bottom plate is not greater than 25 mm, it is beneficial to reduce the overall volume of the battery.

[0036] In some embodiments, a accommodating cavity for accommodating the battery cell is formed in the box body, the box body includes side beams constituting the side walls, the side beams include a first side beam, a second side beam, a third side beam and a fourth side beam arranged in sequence along the circumference of the box body, a first hollow cavity isolated from the external environment is formed in the first side beam, at least one of the second side beam and the fourth side beam is formed with a second hollow cavity isolated from the external environment, the first hollow cavity is connected to the second hollow cavity, and a wire passing hole connected to the accommodating cavity is formed on the side wall of the second hollow cavity facing the accommodating cavity, the wire passing hole is used for passing the wiring harness of the battery, and the buffer structure protrudes from the first side beam.

[0037] In the above technical solution, the first hollow cavity and the second hollow cavity are both isolated from the external environment, so that the air tightness of the battery can be enhanced; the buffer structure protrudes from the first side beam, and when the outer peripheral side of the battery is hit or scratched, the buffer structure is subjected to the force, and the buffer structure can absorb part of the collision energy, so that the force transmitted to the first side beam becomes smaller, which can reduce the possibility of the first side beam being damaged when subjected to force, thereby improving the sealing of the first hollow cavity, thereby improving the air tightness of the battery.

[0038] In some embodiments, a partition is provided between the first hollow cavity and the second hollow cavity to separate the first hollow cavity from the second hollow cavity.

[0039] In the above technical solution, a partition is provided between the first hollow cavity and the second hollow cavity to separate the first hollow cavity and the second hollow cavity. When the first side beam is damaged or cracked by collision, the first hollow cavity is connected to the external environment, and the second hollow cavity is still separated from the external environment. In this way, the possibility of the accommodating cavity being connected to the external environment is small, which can improve the air tightness of the battery, thereby improving the safety performance of the battery.

[0040] In some embodiments, the box body includes a top cover and side beams constituting the side walls, the top cover is disposed on top of the side beams, the battery cells are inverted, and the battery cells are connected to the top cover.

[0041] In the above technical solution, by connecting the battery cell to the top cover, the structural strength of the battery top can be increased, the deformation of the top cover can be reduced when the battery is subjected to force, and the safety and reliability of the battery can be improved; for example, when the battery is a CTB (Cell to Body) battery, the top cover of the battery can constitute the floor of the vehicle, and the structural strength of the vehicle floor can be enhanced by connecting the upper part of the battery cell to the top cover.

[0042] In some embodiments, an adhesive layer is disposed between the upper surface of the battery cell and the top cover to connect the battery cell and the top cover.

[0043] In the above technical solution, the battery cell and the top cover are connected via an adhesive layer, so that the battery cell and the top cover have good connection stability and a simpler connection method.

[0044] In some embodiments, a receiving cavity for receiving the battery cell is formed in the box body, the box body includes a top cover and side beams constituting the side walls, the top cover is arranged on the top of the side beams, and a second seal is provided between the top cover and the top surface of the side beams.

[0045] In the above technical solution, a second sealing member is provided between the top cover and the top surface of the side beam, which can enhance the sealing between the top cover and the side beam, thereby further enhancing the air tightness of the battery.

[0046] In a second aspect, the present invention provides a vehicle, comprising: a vehicle body; and the above-mentioned battery, wherein the battery is fixedly mounted on the vehicle body.

[0047] In the above technical solution, by adopting the above-mentioned battery, the buffer structure is fixedly connected to the box body, and the buffer structure protrudes from the side wall of the box body. When the outer peripheral side of the battery is subjected to a collision, the buffer structure is subjected to a force, and the buffer structure can absorb part of the collision energy, so that the force transmitted to the box body becomes smaller, which can reduce the possibility of the box body being damaged when subjected to force, thereby improving the safety and reliability of the battery and reducing the impact on the service life of the battery.

[0048] In some embodiments, the vehicle has a front portion, and the buffer structure is fixedly connected to an end of the box body close to the front portion.

[0049] In the above technical solution, the buffer structure is fixedly connected to one end of the box body close to the front of the vehicle. When the battery is subjected to a collision, the buffer structure is subjected to a force. The buffer structure is subjected to a force and can absorb part of the collision energy. In this way, the force transmitted to the box body becomes smaller, which can reduce the possibility of the box body being damaged when subjected to force, thereby improving the safety and reliability of the battery and reducing the impact on the battery life.

[0050] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 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:

[0052] Figure 1 is a schematic diagram of the disassembly of a box according to some embodiments of the present invention;

[0053] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0054] Figure 3 is a cross-sectional view of a battery according to some embodiments of the present invention;

[0055] Figure 4 yes Figure 3 A magnified view of the structure in the middle;

[0056] Figure 5 is a schematic diagram of the structure of a vehicle according to some embodiments of the present invention.

[0057] Reference numerals:

[0058] 1000. Vehicles;

[0059] 100, battery; 200, vehicle body; 300, vehicle head;

[0060] 1. Box body; 10. Box body; 11. Top cover; 12. Side beam; 1a. Hollow cavity; 121. Mounting hole; 13. First side beam; 131. First hollow cavity; 14. Second side beam; 15. Fourth side beam; 16. Third side beam; 17. Battery cell; 171. Electrode terminal; 172. Battery cell body;

[0061] 2. bottom plate; 201. through hole; 23. buffer structure; 231. buffer part; 232. connection part; 233. inner surface; 234. upper end surface; 24. avoidance gap;

[0062] 3. Buffer space; 4. Connection structure; 40. Head; 41. Lower end surface; 42. Locking surface; 5. Connecting nut; 51. Threaded hole; 6. First sealing member; 7. Accommodating chamber. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention in the application are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0065] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0068] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation to the present invention.

[0069] The term “plurality” used in the present invention refers to two or more (including two).

[0070] In the present invention, the battery 100 refers to a single physical module including one or more battery cells 17 to provide higher voltage and capacity. For example, the battery 100 mentioned in the present invention may include a battery module or a battery pack. Some batteries 100 may include a battery box for encapsulating one or more battery cells 17 or multiple battery modules, and the battery box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 17.

[0071] In the present invention, the battery cell 17 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiment of the present invention does not limit this. The battery cell 17 may be cylindrical, flat, rectangular or other shapes, etc., and the embodiment of the present invention does not limit this. The battery cell 17 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiment of the present invention does not limit this.

[0072] In the related art, when the outer peripheral side of the battery is collided or scratched, the battery is easily damaged, which will affect the working performance of the battery, reduce the safety and reliability of the battery, and shorten the service life of the battery.

[0073] Based on this, the applicant proposed a battery 100, which includes: at least one battery cell 17, a box body 1 and a buffer structure 23; the battery cells 17 are all arranged in the box body 1; the buffer structure 23 is fixedly connected to the box body 1, and the buffer structure 23 protrudes from the side wall of the box body 1.

[0074] In the battery 100 of the above structure, the buffer structure 23 is fixedly connected to the case 1, and the buffer structure 23 protrudes from the side wall of the case 1. When the outer peripheral side of the battery 100 is subjected to a collision, the buffer structure 23 is subjected to a force, and the buffer structure 23 can absorb part of the collision energy, so that the force transmitted to the case 1 becomes smaller, which can reduce the possibility of the case 1 being damaged when subjected to force, thereby improving the safety and reliability of the battery 100 and reducing the impact on the service life of the battery 100.

[0075] The vehicle 1000 disclosed in the embodiment of the present invention may be a fuel vehicle, a gas vehicle, a new energy vehicle or a rail vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

[0076] The following describes a battery 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0077] like Figure 1-Figure 4As shown, in the first aspect, the present invention provides a battery 100, which includes: at least one battery cell 17, a box body 1 and a buffer structure 23; the battery cells 17 are all arranged in the box body 1; the buffer structure 23 is fixedly connected to the box body 1, and the buffer structure 23 protrudes from the side wall of the box body 1.

[0078] Optionally, the battery 100 described above may be used in a vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .

[0079] The battery 100 including at least one battery cell 17 means that the battery 100 includes one battery cell 17 ; or, the battery 100 includes a plurality of battery cells 17 .

[0080] In the above technical solution, the buffer structure 23 is fixedly connected to the box body 1, and the buffer structure 23 protrudes from the side wall of the box body 1. When the outer peripheral side of the battery 100 is subjected to a collision, the buffer structure 23 is subjected to a force, and the buffer structure 23 can absorb part of the collision energy, so that the force transmitted to the box body 1 becomes smaller, which can reduce the possibility of the box body 1 being damaged when subjected to force, thereby improving the safety and reliability of the battery 100 and reducing the impact on the service life of the battery 100.

[0081] In some embodiments, reference Figure 1 The box body 1 includes a box body main body 10 and a bottom plate 2, the box body main body 1 and the bottom plate 2 are fixedly connected, a receiving cavity 7 is formed between the box body main body 10 and the bottom plate 2, and at least one battery cell 17 is arranged in the receiving cavity 7; the buffer structure 23 is fixedly connected to the bottom plate 2.

[0082] Optionally, the bottom plate 2 of some embodiments of the present invention may constitute the bottom wall of the box body 1, and the bottom plate 2 may be made of a relatively high-strength metal material, including but not limited to steel, so that the bottom plate 2 has relatively high structural strength.

[0083] At least one battery cell 17 is disposed in the accommodating cavity 7 , which means that one battery cell 17 is disposed in the accommodating cavity 7 ; or two, three, four, more than four, etc. battery cells 17 are disposed in the accommodating cavity 7 .

[0084] In the above technical solution, the buffer structure 23 is fixedly connected to the bottom plate 2, and the buffer structure 23 protects the bottom plate 2. When the outer peripheral side of the box body 1 is subjected to a collision, the buffer structure 23 is subjected to force and absorbs part of the collision energy, and the force applied to the bottom plate 2 is smaller, thereby reducing the possibility of the bottom plate 2 being damaged by force.

[0085] In some embodiments, reference Figure 4The buffer structure 23 includes a connecting portion 232 and a buffer portion 231. The connecting portion 232 is fixedly connected between the bottom plate 2 and the buffer portion 231. The buffer portion 231 and the side wall of the box body 1 are arranged opposite to each other. A buffer space 3 for the buffer portion 231 to deform is formed between the buffer portion 231 and the side wall of the box body 1.

[0086] In the above technical solution, a buffer space for deformation of the buffer portion 231 is formed between the buffer portion 231 and the side wall of the box body 1. When the outer peripheral side of the battery 100 is subjected to a collision, the buffer portion 231 is subjected to a force, and the buffer portion 231 deforms to absorb part of the collision energy, so that the force transmitted to the box body 1 becomes smaller, which can reduce the possibility of damage to the box body 1 when subjected to force, thereby further improving the safety and reliability of the battery 100 and reducing the impact on the service life of the battery 100.

[0087] In some embodiments, reference Figure 4 , the direction perpendicular to the side wall is the width direction of the buffer space 3, and the width L1 of the buffer space 3 is 5 to 30 mm.

[0088] For example, the width L1 of the buffer space 3 may be 8 mm, 10 mm, 15 mm or 17 mm.

[0089] Among them, the surface of the buffer part 231 facing the side wall of the box body 1 is the inner surface 233 of the buffer part 231, and the width L1 of the buffer space 3 can be measured in the following way: when the battery 100 is in a normal state and the buffer structure 23 is not deformed by external force, the distance between the inner surface 233 of the buffer part 231 and the side wall of the box body 1 in the width direction of the buffer space 3 is measured, and at least three different position points on the inner surface 233 of the buffer part 231 can be selected to measure the distance between the inner surface 233 of the buffer part 231 and the side wall of the box body 1 in the width direction of the buffer space 3, and the average value of the distances obtained by measuring the above-mentioned at least three different position points is calculated. The average value is the measured width L1 of the buffer space 3 and the average value is within the above-mentioned range of 5 to 30 mm.

[0090] In the above technical solution, by making the width L1 of the buffer space 3 not less than 5 mm, the buffer space 3 can absorb more collision energy and better protect the box body 1; in addition, by making the width L1 of the buffer space 3 not greater than 30 mm, while ensuring the energy absorption effect of the buffer space 3, it also helps to reduce the volume of the battery 100 and reduce the space occupied by the battery 100.

[0091] In some embodiments, reference Figure 4 , the direction perpendicular to the bottom plate 2 is the height direction of the buffer space 3, and the height H1 of the buffer space 3 is 5 to 30 mm.

[0092] For example, the height H1 of the buffer space 3 may be 8 mm, 10 mm, 15 mm or 17 mm.

[0093] Among them, the upward surface of the buffer part 231 is the upper end surface 234 of the buffer part 231, and the height H1 of the buffer space 3 can be measured in the following way: when the battery 100 is in a normal state and the buffer structure 23 is not deformed by external force, the vertical distance between the upper end surface 234 of the buffer part 231 and the upper surface of the bottom plate 2 in the height direction of the buffer space 3 is measured, and at least three different position points on the upper end surface 234 of the buffer part 231 can be selected to measure the vertical distance between the upper end surface 234 of the buffer part 231 and the upper surface of the bottom plate 2 in the height direction of the buffer space 3, and the average value of the distances obtained by measuring the above-mentioned at least three different position points is calculated, and the average value is the measured height H1 of the buffer space 3 and the average value is within the above-mentioned range of 5 to 30 mm.

[0094] In the above technical solution, the height H1 of the buffer space 3 is not less than 5 mm, so that the protection height of the buffer structure 23 is relatively high, and the buffer structure 23 can protect the box body 1 in a larger range, further reducing the possibility of the box body 1 being damaged by force; the height H1 of the buffer space 3 is not greater than 30 mm, while increasing the protection range of the buffer structure 23 for the box body 1, it also helps to reduce the material used in the buffer structure 2, and helps to reduce the overall weight of the battery 100.

[0095] In some embodiments, reference Figure 4 The connecting portion 232 extends in an arc shape in a direction from the buffer portion 231 to the bottom plate 2 .

[0096] In the above technical solution, when the outer peripheral side of the battery 100 is hit, the buffer portion 231 is subjected to force and absorbs part of the collision energy, and the connecting portion 232 can transfer the force exerted on the buffer portion 231 to the bottom plate 2, so that the force exerted on the box body 10 is small, which can reduce the possibility of damage to the box body 10. In addition, the arc-shaped connecting portion 232 also has a guiding function. When the buffer structure 23 is hit, the connecting portion 232 can guide the collision position to the bottom plate 2 to reduce the degree of damage to the box body 10.

[0097] In some embodiments, reference Figure 4 The buffer structure 23 and the bottom plate 2 are an integrally formed structure.

[0098] In the above technical solution, the buffer structure 23 and the base plate 2 are integrally formed, which can enhance the stability of the overall structure and performance of the buffer structure 23 and the base plate 2, and can save unnecessary assembly parts and connection processes, which is beneficial to improving the assembly efficiency of the battery 100.

[0099] In some embodiments, reference Figure 1-Figure 4 The box body 10 and the bottom plate 2 are fixedly connected via a connecting structure 4, and the connecting structure 4 is detachably connected to the box body 10 and the bottom plate 2.

[0100] In the above technical solution, the connecting structure 4 is detachably connected to the box body 10 and the bottom plate 2, which facilitates the disassembly and assembly between the box body 10 and the bottom plate 2; when the bottom plate 2 is severely deformed or damaged, it is convenient to remove the bottom plate 2 for maintenance and replacement, and it is also convenient to maintain the box body 10 and the battery cell 17.

[0101] In some embodiments, reference Figure 4 A threaded hole 51 is formed on the box body 10 , a through hole 201 is formed on the bottom plate 2 , and the connecting structure 4 is a screw. The connecting structure 4 passes through the through hole 201 and is screwed to the box body 10 through the threaded hole 51 .

[0102] In the above technical solution, the bottom plate 20 can be fixedly connected to the box body 10 through the threaded connection between the connection structure 4 and the box body 10, and can be easily disassembled, further improving the convenience of maintaining the battery 100.

[0103] In some embodiments, reference Figure 4 The head of the connecting structure 4 protrudes from the bottom surface of the bottom plate 2, the direction perpendicular to the bottom plate 2 is the height direction of the connecting structure 4, and the height dimension H2 of the head is less than or equal to 6 mm.

[0104] For example, the height H2 of the head of the connection structure 4 may be 6 mm, 5 mm, 4 mm or 3 mm.

[0105] Among them, the downward surface of the head 40 of the connecting structure 4 is the lower end surface 41 of the head 40, the downward surface of the bottom plate 2 is the bottom surface of the bottom plate 2, the surface where the head 40 abuts or contacts the bottom surface of the bottom plate 2 is the locking surface 42 of the head 40, and the height dimension H2 of the head 40 of the connecting structure 4 can be measured in the following manner: when the battery 100 is in a normal state, measure the vertical distance between the lower end surface 41 of the head 40 and the locking surface 42, and select at least three different position points on the lower end surface 41 of the head 40 to measure the vertical distance between the lower end surface 41 of the head 40 and the locking surface 42, and calculate the maximum value of the distances obtained by measuring the at least three different position points. The maximum value is the measured height H2 of the head 40 of the connecting structure 4 and the maximum value is less than or equal to 6 mm.

[0106] It is understandable that when the battery 100 encounters a collision with an obstacle, the larger the height dimension of the head of the connecting structure 4 is, the easier it is for the head of the connecting structure 4 to contact the obstacle. In this way, the obstacle directly squeezes the head of the connecting structure 4, which can easily cause the connecting structure 4 to be severely deformed or even broken, affecting the stability of the connection between the bottom plate 2 and the box body 10, and also easily affecting the safety and service life of the battery 100.

[0107] In the above technical solution, by making the height dimension H2 of the head of the connecting structure 4 no greater than 6 mm, when the battery 100 is subjected to a collision, the possibility of the connecting structure 4 being squeezed by the collision can be reduced, thereby reducing the possibility of damage to the battery 100 caused by the deformation of the connecting structure 4 after being subjected to the force, thereby further improving the safety and reliability of the battery 100.

[0108] In some embodiments, reference Figure 3 and Figure 4 The box body 10 includes a side beam 12 constituting a side wall, a hollow cavity 1a is formed in the side beam 12, a connecting nut 5 is provided in the hollow cavity 1a, and a threaded hole 51 is formed in the connecting nut 5. A mounting hole communicating with the hollow cavity 1a is formed on the bottom surface of the side beam, and the connecting nut is riveted to the side beam through the mounting hole.

[0109] For example, the connecting nut 5 mentioned above can be a rivet nut.

[0110] In the above technical solution, the connecting nut 5 is riveted to the side beam 12 through the mounting hole 121, which is convenient for operation and makes the connection stability between the connecting nut 5 and the side beam 12 stronger. By threading the connecting structure 4 with the connecting nut 5, the stability of the connection between the bottom plate 2 and the box body 10 can be further enhanced.

[0111] In some embodiments, reference Figure 4 A first sealing member 6 is provided between the bottom surface of the box body 10 and the bottom plate 2 .

[0112] In the above technical solution, the first sealing member 6 can enhance the sealing between the bottom surface of the box body 10 and the bottom plate 2, thereby enhancing the airtightness of the battery 100 and further improving the safety of the battery 100.

[0113] In some embodiments, reference Figure 1 and Figure 2 The buffer structure 23 forms an avoidance gap 24 , and the avoidance gap 24 is used to avoid the installation structure of the battery 100 .

[0114] In the above technical solution, the avoidance notch 24 avoids the installation structure of the battery 100, so that the installation of the battery 100 is more convenient and easy to operate; for example, when the battery 100 is arranged on the vehicle body, the avoidance notch 24 can avoid the installation structure connecting the battery 100 and the vehicle body, so as to facilitate the disassembly and assembly of the battery 100 on the vehicle body.

[0115] In some embodiments, reference Figure 3 , the battery cell 17 is spaced apart from the side wall of the box body 1 .

[0116] In the above technical solution, the side wall of the box body 1 is separated from the battery cell 17, so that the transmission of the force between the side wall of the box body 1 and the battery cell 17 can be blocked. For example, when the side wall of the box body 1 is subjected to a collision force, the side wall of the box body 1 is not easy to transmit the collision force to the battery cell 17, which can improve the safety of the battery cell 17; and the side wall of the box body 1 is separated from the battery cell 17, so that the side wall of the box body 1 has a deformation space. When the side wall of the box body 1 is deformed by force, the possibility of the side wall of the box body 1 squeezing the battery cell 17 can be reduced, which can further improve the safety and reliability of the battery 100.

[0117] In some embodiments, reference Figure 1-Figure 3 The box body 1 includes a box body main body 10 and a bottom plate 2, the box body main body 10 and the bottom plate 2 are fixedly connected, a receiving cavity 7 is formed between the box body main body 1 and the bottom plate 2, at least one battery cell 17 is arranged in the receiving cavity 7, and the bottom surface of the battery cell 17 is separated from the bottom plate 2.

[0118] At least one battery cell is disposed in the accommodating cavity, which means that one battery cell 17 is disposed in the accommodating cavity 7 ; or, a plurality of battery cells 17 are disposed in the accommodating cavity 7 .

[0119] In the above technical solution, the bottom surface of the battery cell 17 is separated from the bottom plate 2, and a buffer energy absorption space is provided between the bottom plate 2 and the battery cell 17. When the bottom plate 2 is subjected to a force, the bottom plate 2 can be deformed to absorb part of the energy. The buffer energy absorption space can absorb part of the collision energy, thereby reducing the possibility of the bottom plate 2 squeezing the battery cell 17, so as to further improve the safety of the battery cell 17.

[0120] In some embodiments, reference Figure 3 , the distance L2 between the bottom surface of the battery cell 17 and the bottom plate 2 is 10 to 25 mm.

[0121] For example, the distance L2 between the bottom surface of the battery cell 17 and the bottom plate may be 13 mm, 14 mm, 16 mm, or 20 mm.

[0122] Optionally, the battery cell 17 includes a battery cell body 172 and an electrode terminal 171 , and the electrode terminal 171 is located on one side of the battery cell body 172 .

[0123] Among them, when the electrode terminal 171 is located on the bottom surface of the battery cell body 172, the downward surface of the electrode terminal 171 is the bottom surface of the electrode terminal 171 and can be used as the bottom surface of the battery cell 17. The distance L2 between the bottom surface of the battery cell 17 and the bottom plate can be measured in the following way: when the battery 100 is in a normal state and the battery cell 17 and the bottom plate 2 are not deformed by external force, the vertical distance between the bottom surface of the electrode terminal 171 and the upper surface of the bottom plate 2 is measured. At least three different battery cells 17 can be selected to measure the vertical distance between the bottom surface of the electrode terminal 171 of different battery cells 17 and the upper surface of the bottom plate 2. The average value of the distances obtained by measuring the above-mentioned at least three different battery cells 17 is calculated. The average value is the measured distance L2 between the bottom surface of the battery cell 17 and the bottom plate 2 and the average value is within the above-mentioned range of 10 to 25 mm.

[0124] When the electrode terminal 171 is located on the side other than the bottom surface of the battery cell body 172, the downward surface of the battery cell body 172 is the bottom surface of the battery cell body 172 and can be used as the bottom surface of the battery cell 17. The distance L2 between the bottom surface of the battery cell 17 and the bottom plate can be measured in the following manner: when the battery 100 is in a normal state and the battery cell 17 and the bottom plate 2 are not deformed by external force, the vertical distance between the bottom surface of the battery cell body 172 and the upper surface of the bottom plate 2 is measured. At least three different battery cells 17 can be selected, and the vertical distances between the bottom surfaces of different battery cells 17 and the upper surface of the bottom plate 2 are measured. The average value of the distances obtained by measuring the at least three different battery cells 17 is calculated. The average value is the measured distance L2 between the bottom surface of the battery cell 17 and the bottom plate 2 and the average value is within the above-mentioned range of 10 to 25 mm.

[0125] In the above technical solution, by ensuring that the spacing L2 between the bottom surface of the battery cell 17 and the bottom plate is not less than 10 mm, sufficient deformation space can be left for the bottom plate 2 to reduce the possibility of squeezing the battery cell 17 when the bottom plate 2 is deformed by force, thereby improving the safety of the battery cell 17; by ensuring that the spacing L2 between the bottom surface of the battery cell 17 and the bottom plate 2 is not greater than 25 mm, it is beneficial to reduce the overall volume of the battery 100.

[0126] In some embodiments, reference Figure 1-Figure 3A receiving cavity 7 for receiving a battery cell 17 is formed in the box body 1. The box body 1 includes a side beam 12 constituting a side wall. The side beam 12 includes a first side beam 13, a second side beam 14, a third side beam 16 and a fourth side beam 15 which are sequentially arranged along the circumference of the box body 1. A first hollow cavity 131 isolated from the external environment is formed in the first side beam 13. At least one of the second side beam 14 and the fourth side beam 15 is formed with a second hollow cavity isolated from the external environment. The first hollow cavity 131 is communicated with the second hollow cavity. A wire passing hole communicating with the accommodating cavity 7 is formed on the side wall of the second hollow cavity facing the receiving cavity. The wire passing hole is used for passing the wiring harness of the battery 100. The buffer structure 23 protrudes from the first side beam 13.

[0127] At least one of the second side beam 14 and the fourth side beam 15 forms a second hollow cavity isolated from the external environment. It can be considered that the second side beam 14 forms a second hollow cavity isolated from the external environment; it can also be considered that the fourth side beam 15 forms a second hollow cavity isolated from the external environment; it can also be considered that both the second side beam 14 and the fourth side beam 15 form a second hollow cavity isolated from the external environment.

[0128] For example, when the battery is used in a vehicle, the front side of the battery is easily scratched, causing damage to the first side beam, while the first hollow cavity and the second hollow cavity in the first side beam are connected, which will cause the airtightness of the battery to be destroyed.

[0129] In the above technical solution, the first hollow cavity 131 and the second hollow cavity are both isolated from the external environment, so that the airtightness of the battery 100 can be enhanced; the buffer structure 23 protrudes from the first side beam, when the outer peripheral side of the battery 100 is hit or scratched, the buffer structure 23 is subjected to force, and the buffer structure 23 can absorb part of the collision energy, so that the force transmitted to the first side beam 13 becomes smaller, which can reduce the possibility of the first side beam 13 being damaged when subjected to force, so as to improve the sealing of the first hollow cavity 131, thereby improving the airtightness of the battery 100.

[0130] In some embodiments, a partition is disposed between the first hollow cavity 131 and the second hollow cavity to separate the first hollow cavity 131 from the second hollow cavity.

[0131] It is understandable that if the first side beam 13 is severely deformed or damaged, it is easy to cause the first hollow cavity 131 in the first side beam 13 to communicate with the external environment. Since the first hollow cavity 131 is connected to the second hollow cavity, and the second hollow cavity is connected to the accommodating cavity 7, this will cause the accommodating cavity 7 to communicate with the external environment, affecting the air tightness of the battery 100, and the safety of the battery 100 is difficult to ensure. For example, when the battery is used in a vehicle, when the vehicle 1000 is driving, when the vehicle passes through an uneven road surface, or when the vehicle passes through a road surface with obstacles, the battery 100 located at the bottom of the vehicle body is easily hit or scratched, and the front side of the battery 100 is easily scratched, causing the first side beam 13 to be easily damaged by collision, which is easy to cause the accommodating cavity 7 to communicate with the external environment, affecting the air tightness of the battery 100.

[0132] In the above technical solution, a partition is provided between the first hollow cavity 131 and the second hollow cavity to separate the first hollow cavity 131 and the second hollow cavity. When the first side beam 13 is damaged or cracked by collision, the first hollow cavity 131 is connected with the external environment, and the second hollow cavity is still separated from the external environment. In this way, the possibility of the accommodating cavity 7 being connected with the external environment is small, which can improve the air tightness of the battery 100, thereby improving the safety performance of the battery 100.

[0133] In some embodiments, reference Figure 3 The box body 1 includes a top cover 11 and side beams 12 constituting side walls. The top cover 11 is covered on the top of the side beams 12 . The battery cell 17 is inverted and connected to the top cover 11 .

[0134] It should be noted that the electrode terminals 171 of the above-mentioned battery cells 17 can be located on the same side of the battery cells 17 . When the battery cells 17 are inverted, it can be considered that one end of the battery cells 17 with the electrode terminals 171 faces the bottom plate 2 , and the other end of the battery cells 17 faces the top cover 11 and is connected to the top cover 11 .

[0135] In the above technical solution, by connecting the battery cell 17 to the top cover 11, the structural strength of the top of the battery 100 can be increased, and the deformation of the top cover 11 can be reduced when the battery 100 is subjected to force, thereby improving the safety and reliability of the battery 100; for example, when the battery 100 is a CTB (Cell to Body) battery, the top cover 11 of the battery 100 can constitute the floor of the vehicle 1000, and by connecting the upper part of the battery cell 17 to the top cover 11, the structural strength of the floor of the vehicle 1000 can be enhanced.

[0136] In some embodiments, an adhesive layer is disposed between the upper surface of the battery cell 17 and the top cover 11 to connect the battery cell 17 and the top cover 11 .

[0137] In the above technical solution, the battery cell 17 and the top cover 11 are connected via an adhesive layer, so that the battery cell 17 and the top cover 11 have good connection stability and a simple connection method.

[0138] In some embodiments, reference Figure 3 A receiving cavity 7 for receiving a battery cell 17 is formed in the box body 1. The box body 1 includes a top cover 11 and a side beam 12 constituting a side wall. The top cover 11 is covered on the top of the side beam 12. A second sealing member is provided between the top cover 11 and the top surface of the side beam 12.

[0139] In the above technical solution, a second sealing member is provided between the top cover 11 and the top surface of the side beam 12 , which can enhance the sealing between the top cover 11 and the side beam 12 , thereby further enhancing the airtightness of the battery 100 .

[0140] Reference Figure 5 In a second aspect, the present invention provides a vehicle 1000 , comprising: a vehicle body 200 and the above-mentioned battery 100 , wherein the battery 100 is fixedly installed on the vehicle body 200 .

[0141] The battery 100 can provide electrical energy to the vehicle body 200 . The battery 100 can serve as a driving power source for the vehicle body 200 and provide driving force for the vehicle body 200 .

[0142] Alternatively, if Figure 5 As shown, when the battery 100 is used in the vehicle body 200, the battery 100 can be arranged at the bottom of the vehicle body 200. The battery 100 can be used to power the vehicle body 200, for example, the battery 100 can be used as an operating power source of the vehicle body 200 and used in the circuit system of the vehicle body 200. The vehicle body 200 may also include a controller and a motor, and the controller is used to control the battery 100 to power the motor, for example, for the working power demand of the vehicle body 200 during startup, navigation and driving.

[0143] By adopting the above-mentioned battery 100, the buffer structure 23 is fixedly connected to the box body 1, and the buffer structure 23 protrudes from the side wall of the box body 1. When the outer peripheral side of the battery 100 is subjected to a collision, the buffer structure 23 is subjected to a force, and the buffer structure 23 can absorb part of the collision energy, so that the force transmitted to the box body 1 becomes smaller, which can reduce the possibility of the box body 1 being damaged when subjected to force, thereby improving the safety and reliability of the battery 100 and reducing the impact on the service life of the battery 100.

[0144] In some embodiments, the vehicle 1000 has a front end 300 , and the buffer structure 23 is fixedly connected to one end of the box body 1 close to the front end 300 .

[0145] It is understandable that when the vehicle 1000 is driving, when the vehicle 1000 passes through an uneven road surface, or when the vehicle 1000 passes through a road surface with obstacles, the battery 100 provided on the vehicle body is easily collided or scratched, especially the side of the battery 100 close to the front of the vehicle is easily scratched, which can easily affect the safety of the battery.

[0146] In the above technical solution, the buffer structure 23 is fixedly connected to one end of the box body 1 close to the front end 300. When the battery 100 is subjected to a collision, the buffer structure 23 is subjected to a force. The buffer structure 23 can absorb part of the collision energy, so that the force transmitted to the box body 1 becomes smaller, which can reduce the possibility of the box body 1 being damaged when subjected to force, thereby improving the safety and reliability of the battery 100 and reducing the impact on the service life of the battery 100.

[0147] In some embodiments of the present invention, reference Figure 1-Figure 4 The battery 100 includes a box body 10, a buffer structure 23 and a plurality of battery cells 17. The battery cells 17 are all arranged in the box body 1, and the battery cells 17 are separated from the side walls of the box body 1; the buffer structure 23 is fixedly connected to the box body 1, and the buffer structure 23 protrudes from the side walls of the box body 1.

[0148] The box body 1 includes a top cover 11, a box body 10 and a bottom plate 2. The box body 10 and the bottom plate 2 are fixedly connected. A accommodating cavity 7 is formed between the box body 10 and the bottom plate 2. A plurality of battery cells 17 are arranged in the accommodating cavity 7. The bottom plate 2 is arranged at the bottom of the box body 10, and the top cover 11 is connected to the top of the box body 10. A second seal is provided between the top cover 11 and the box body 10. The buffer structure 23 is connected and fixed to the bottom plate 2 and is integrally formed with the bottom plate.

[0149] The box body 10 includes a side beam 12, which constitutes the side wall of the box body 1. A hollow cavity 1a is formed in the side beam 12. The hollow cavities 1a can be four arranged in sequence along the up and down directions. A mounting hole 121 connected to the hollow cavity 1a is formed on the bottom surface of the side beam 12. The mounting hole 121 passes through the bottom wall of the hollow cavity 1a located at the bottom; the connecting nut 5 is riveted to the side beam 12 through the mounting hole 121, and the connecting nut 5 is a pull rivet nut.

[0150] The side beam 12 includes a first side beam 13, a third side beam 16, a second side beam 14 and a fourth side beam 15. The first side beam 13 is separated from the battery cell 17, and the buffer structure 23 protrudes from the first side beam 13. A first hollow cavity 131 isolated from the external environment is formed in the first side beam 13, and a second hollow cavity isolated from the external environment is formed in the second side beam 14 and the fourth side beam 15. The left and right ends of the first side beam 13 are respectively connected to the second side beam 14 and the fourth side beam 15. The first hollow cavity 131 is connected to the second hollow cavity. The side wall of the second hollow cavity facing the accommodating cavity 7 is formed with a wire hole connected to the accommodating cavity 7. The wire hole is used for the wire harness of the battery 100. A partition is provided between the first hollow cavity 131 and the second hollow cavity to separate the first hollow cavity 131 from the second hollow cavity.

[0151] The side beam 12 and the bottom plate 2 are fixedly connected by the connecting structure 4, and the connecting structure 4 is detachably connected to the box body 10 and the bottom plate 2. The connecting nut 5 is formed with a threaded hole 51, and the bottom plate 2 is formed with a through hole 201. The connecting structure 4 is a screw, and the connecting structure 4 passes through the through hole 201 and is screwed to the box body 10 through the threaded hole 51. A first sealing member 6 is provided between the bottom surface of the side beam 12 and the bottom plate 2; the head 40 of the connecting structure 4 protrudes from the bottom surface of the bottom plate 2, and the direction perpendicular to the bottom plate is the height direction of the connecting structure 4, and the height dimension H2 of the head 40 is less than or equal to 6 mm.

[0152] The bottom plate 2 is located below the battery cell 17 and is separated from the battery cell 17. The battery cell 17 includes a battery cell body 172 and an electrode terminal 171. The battery cell 17 is inverted, and the electrode terminal 171 is located on the bottom surface of the battery cell body 172. The distance L2 between the bottom surface of the electrode terminal 171 and the bottom plate 2 is 16 mm. An adhesive layer is provided between the upper surface of the battery cell 17 and the top cover 11 to connect the battery cell 17 and the top cover 11.

[0153] The buffer structure 23 is connected to the front edge of the bottom plate 2 and extends upward, and a buffer space 3 is defined between the buffer structure 23 and the outer peripheral side of the side beam 12. An avoidance notch 24 is formed on the buffer structure 23, and the avoidance notch 24 is used to avoid the installation structure of the battery 100. The buffer structure 23 includes a buffer portion 231 and a connecting portion 232, the buffer portion 231 is opposite to the side beam 13 and is spaced apart, and the connecting portion 232 is connected between the buffer portion 231 and the bottom plate 2, and the connecting portion 232 extends in an arc shape in the direction from the buffer portion 231 to the bottom plate 2.

[0154] The buffer portion 231 and the side beam 12 are arranged opposite to each other, and a buffer space 3 is formed between the buffer portion 231 and the side beam 12 for the buffer portion 231 to deform. The direction of the buffer portion 231 perpendicular to the side beam 13 is the width direction of the buffer space 3, and the width L1 of the buffer space 3 is 5 to 30 mm; the direction of the buffer portion 231 perpendicular to the bottom plate 2 is the height direction of the buffer space 3, and the height H1 of the buffer space 3 is 5 to 30 mm.

[0155] In the above technical solution, the buffer structure 23 is fixedly connected to the box body 1, and the buffer structure 23 protrudes from the side wall of the box body 1. When the outer peripheral side of the battery 100 is subjected to a collision, the buffer structure 23 is subjected to a force, and the buffer structure 23 can absorb part of the collision energy, so that the force transmitted to the box body 1 becomes smaller, which can reduce the possibility of the box body 1 being damaged when subjected to force, thereby improving the safety and reliability of the battery 100 and reducing the impact on the service life of the battery 100.

[0156] 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 present invention. 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0157] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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, characterized in that: include: at least one battery cell; A box body, wherein the battery cells are all arranged in the box body; The buffer structure is fixedly connected to the box body and protrudes from the side wall of the box body.

2. The battery according to claim 1, characterized in that The box body comprises a box body main body and a bottom plate, the box body main body and the bottom plate are fixedly connected, a receiving cavity is formed between the box body main body and the bottom plate, and the at least one battery cell is arranged in the receiving cavity; The buffer structure is fixedly connected to the bottom plate.

3. The battery according to claim 2, characterized in that The buffer structure includes a connecting portion and a buffer portion, the connecting portion is fixedly connected between the bottom plate and the buffer portion, the buffer portion and the side wall of the box body are arranged opposite to each other, and a buffer space for deformation of the buffer portion is formed between the buffer portion and the side wall of the box body.

4. The battery according to claim 3, characterized in that The direction perpendicular to the side wall is the width direction of the buffer space, and the width of the buffer space is 5 to 30 mm.

5. The battery according to claim 3, characterized in that The direction perpendicular to the bottom plate is the height direction of the buffer space, and the height of the buffer space is 5 to 30 mm.

6. The battery according to claim 3, characterized in that The connecting portion extends in an arc shape in a direction from the buffer portion to the bottom plate.

7. The battery according to claim 2, characterized in that The buffer structure and the bottom plate are an integrally formed structure.

8. The battery according to claim 2, characterized in that The box body and the bottom plate are fixedly connected via a connecting structure, and the connecting structure is detachably connected to the box body and the bottom plate.

9. The battery according to claim 8, characterized in that The box body is formed with a threaded hole, the bottom plate is formed with a through hole, the connection structure is a screw, and the connection structure passes through the through hole and is screwed to the box body through the threaded hole.

10. The battery according to claim 8 or 9, characterized in that: The head of the connecting structure protrudes from the bottom surface of the bottom plate, the direction perpendicular to the bottom plate is the height direction of the connecting structure, and the height dimension of the head is less than or equal to 6 mm.

11. The battery according to claim 9, characterized in that The box body includes a side beam constituting the side wall, a hollow cavity is formed in the side beam, a connecting nut is provided in the hollow cavity, the connecting nut is formed with the threaded hole, a mounting hole connected to the hollow cavity is formed on the bottom surface of the side beam, and the connecting nut is riveted to the side beam through the mounting hole.

12. The battery according to claim 8, characterized in that A first sealing member is provided between the bottom surface of the box body and the bottom plate.

13. The battery according to any one of claims 1 to 12, characterized in that The buffer structure forms an avoidance gap, and the avoidance gap is used to avoid the installation structure of the battery.

14. The battery according to any one of claims 1 to 12, characterized in that The battery cells are spaced apart from the side walls of the case.

15. The battery according to claim 1, characterized in that The box body includes a box body main body and a bottom plate, wherein the box body main body and the bottom plate are fixedly connected, a receiving cavity is formed between the box body main body and the bottom plate, the at least one battery cell is arranged in the receiving cavity, and the bottom surface of the battery cell is spaced apart from the bottom plate.

16. The battery according to claim 15, characterized in that The distance between the bottom surface of the battery cell and the bottom plate is 10 to 25 mm.

17. The battery according to claim 1, characterized in that A accommodating cavity for accommodating the battery cell is formed in the box body, the box body includes side beams constituting the side walls, the side beams include a first side beam, a second side beam, a third side beam and a fourth side beam arranged in sequence along the circumference of the box body, a first hollow cavity isolated from the external environment is formed in the first side beam, at least one of the second side beam and the fourth side beam is formed with a second hollow cavity isolated from the external environment, the first hollow cavity is communicated with the second hollow cavity, a wire passing hole communicated with the accommodating cavity is formed on the side wall of the second hollow cavity facing the accommodating cavity, the wire passing hole is used for passing the wiring harness of the battery, and the buffer structure protrudes from the first side beam.

18. The battery according to claim 17, characterized in that A partition is provided between the first hollow cavity and the second hollow cavity to separate the first hollow cavity from the second hollow cavity.

19. The battery according to claim 1, characterized in that The box body comprises a top cover and side beams constituting the side walls, the top cover is arranged on the top of the side beams, the battery cells are inverted, and the battery cells are connected to the top cover.

20. The battery according to claim 19, characterized in that An adhesive layer is provided between the upper surface of the battery cell and the top cover to connect the battery cell and the top cover.

21. The battery according to claim 19, characterized in that The box body is formed with a receiving cavity for receiving the battery cell. The box body includes a top cover and side beams constituting the side walls. The top cover is disposed on the top of the side beams. A second sealing member is disposed between the top cover and the top surface of the side beams.

22. A vehicle, characterized in that: include: Vehicle body; The battery according to any one of claims 1 to 21, wherein the battery is fixedly mounted on the vehicle body.

23. The vehicle according to claim 22, characterized in that The vehicle has a front portion, and the buffer structure is fixedly connected to an end of the box body close to the front portion.

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