CN218966698U

CN218966698U - Battery and vehicle

Info

Publication number: CN218966698U
Application number: CN202223022553.6U
Authority: CN
Inventors: 张玉飞; 刘瑞堤
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-05-05
Anticipated expiration: 2032-11-11

Abstract

The application discloses battery and vehicle, this battery is used for fixed setting on the automobile body of vehicle, the battery includes: the shell comprises a top plate and a bottom plate which are oppositely arranged; the battery cell assembly is positioned inside the shell; the first sealing piece is positioned on one side, away from the bottom plate, of the top plate, and one side, away from the top plate, of the first sealing piece is used for being abutted with the vehicle body; and a second seal positioned between the cell assembly and the base plate. Through above-mentioned design mode, this application can improve the heat preservation performance of battery and can reduce the noise of battery position department.

Description

Battery and vehicle

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a battery and a vehicle.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles. In existing electric vehicles, the battery is assembled to the vehicle body as a separate system component. However, during the running of the electric vehicle, there are problems in that the battery position is poor in heat retaining performance and loud in noise.

Disclosure of Invention

The application provides a battery and vehicle, can improve the heat preservation performance of battery and can reduce the noise of battery position department.

In order to solve the technical problems, one technical scheme adopted by the application is as follows: there is provided a battery for fixing to a body of a vehicle, the battery comprising: the shell comprises a top plate and a bottom plate which are oppositely arranged; the battery cell assembly is positioned inside the shell; the first sealing piece is positioned on one side, away from the bottom plate, of the top plate, and one side, away from the top plate, of the first sealing piece is used for being abutted with the vehicle body; and a second seal positioned between the cell assembly and the base plate. On the one hand, by introducing the first seal between the roof and the body, the amount of air entering between the body and the roof during running of the vehicle is reduced due to the blocking effect of the first seal, so that the noise generated by the air at this point is reduced; and when the air is colder and the battery needs to be insulated, the heat exchange between the air and the battery is reduced due to the reduction of the amount of the air entering between the vehicle body and the top plate, and the heat insulation effect of the battery is enhanced. On the other hand, by introducing the second seal member between the bottom plate and the battery cell assembly, the amount of air entering between the bottom plate and the battery cell assembly during the running of the vehicle is reduced due to the blocking effect of the second seal member, thereby reducing the noise generated by the air therein; and when the air is colder and the battery needs to be insulated, the heat exchange between the air and the battery is reduced due to the reduction of the amount of the air entering between the bottom plate and the battery monomer component, and the heat insulation effect of the battery is enhanced. In a word, through the synergistic effect in the two aspects, the whole heat preservation effect of the battery is stronger, and the noise is lower.

In some embodiments, the first seal is an elastic member, and the first seal is compressively disposed between the roof and the body when the battery is secured to the body. The design mode of the first sealing piece can enable the sealing effect to be good; and when the battery receives a certain impact force in the height direction, the first sealing piece made of elastic materials can play a certain role in stress buffering.

In some embodiments, the first seal compresses 10% -30% when the battery is secured to the vehicle body; the first sealing piece is provided with a first thickness before being compressed, the first sealing piece is provided with a second thickness after being compressed, and the compression amount is the ratio of the difference value of the first thickness and the second thickness to the first thickness. The control range of the compression amount of the first sealing element can reduce the damage of the reaction force of the first sealing element to the top plate while ensuring the sealing effect.

In some embodiments, the second seal is a resilient member and the second seal is compressively disposed between the base plate and the cell assembly. The design mode of the second sealing piece can enable the sealing effect to be good; and when the battery receives a certain impact force in the height direction, the second sealing piece made of elastic materials can play a certain role in stress buffering.

In some embodiments, the second seal has a compression of 40% -60%; the second sealing piece is compressed and then has a fourth thickness, and the compression amount is the ratio of the difference value of the third thickness and the fourth thickness to the third thickness. The control range of the compression amount of the second sealing member can reduce damage of the reaction force of the second sealing member to the battery cell assembly and the bottom plate while ensuring the sealing effect.

In some embodiments, the battery cell assembly includes a plurality of battery cells and a thermal management component; wherein, a plurality of battery cells set up in thermal management part deviates from bottom plate one side, and the second sealing member set up in thermal management part with between the bottom plate. The thermal management component can perform cooling treatment when the working temperature of the battery monomer exceeds a threshold value so as to prevent chain reaction caused by thermal runaway of the single battery monomer, thereby improving the safety of the battery. Further, the second sealing member is provided between the heat management member and the base plate in such a manner that the probability of air entering from within the gap between the heat management member and the base plate can be reduced, and heat dissipation and noise between the heat management member and the base plate can be reduced.

In some embodiments, the bottom plate includes a middle region and an edge region surrounding the middle region, and the middle region is remote from the top plate relative to the edge region; wherein the second seal is disposed between the thermal management component and the edge region. The bottom plate in the concave design can prevent the damage of external force to the battery cell assembly; and when the second sealing member is provided between the heat management member and the edge region, the probability that external rainwater or the like enters the relatively concave intermediate region and accumulates in the intermediate region can be reduced.

In some embodiments, the first seal is annular such that the roof and the body form a first closed cavity at the first seal location; and/or the second sealing member is annular, so that the bottom plate and the battery cell assembly form a second airtight cavity at the position of the second sealing member. On the one hand, after the annular first sealing piece is introduced between the top plate and the vehicle body to form the first closed cavity, the probability of air entering the first closed cavity during the running process of the vehicle is reduced, and the noise generated by the air at the first closed cavity is further reduced; and when the air is colder and the battery needs to be insulated, the heat exchange between the air and the battery is reduced and the heat insulation effect of the battery is enhanced because the probability of air entering the first closed cavity is reduced. On the other hand, after the annular second sealing member is introduced between the bottom plate and the battery cell assembly to form the second closed cavity, the probability of air entering the second closed cavity during the running of the vehicle is reduced, and thus the noise generated by the air at the place is reduced; and when the air is colder and the battery needs to be insulated, the heat exchange between the air and the battery is reduced and the heat insulation effect of the battery is enhanced because the probability of air entering the second closed cavity is reduced. In a word, through the synergistic effect in the two aspects, the whole heat preservation effect of the battery is stronger, and the noise is lower.

On this basis, the first seal and/or the second seal comprises at least one corner, which is curved. The design mode of the corner can reduce the probability of stress concentration points generated at the corner and reduce the probability of corner fracture.

In some embodiments, the first seal includes a main body portion and at least one boss portion disposed in a stacked relationship on a side of the main body portion facing away from the top plate; when the battery is fixed with the vehicle body, the distance between the top plate corresponding to the position of the protruding part and the vehicle body is larger than the distance between the top plate corresponding to the position of the main body part, where the protruding part is not arranged, and the vehicle body. The design mode not only can reduce the cost of the first sealing element, but also can enable the compression amount of the first sealing element at the position with larger space and smaller space to be approximately the same, so that the stress of the first sealing element is more uniform, the stress concentration probability of the first sealing element is lower, and the fracture probability of the first sealing element is lower.

In order to solve the technical problems, another technical scheme adopted by the application is as follows: there is provided a vehicle including: the battery of any one of the embodiments described above, and the battery is fixedly disposed on the vehicle body.

In some embodiments, the vehicle body includes a head in a length direction of the vehicle body, and the first seal and/or the second seal includes a portion disposed adjacent to the head and extending in a width direction of the vehicle body. In the traveling direction of the vehicle (i.e., in the length direction of the vehicle body), air generally enters from the head position, and when the first seal and/or the second seal include a portion that is disposed adjacent to the head and extends in the width direction of the vehicle body, the portion can block a large portion of the air from entering to reduce noise and improve the heat retaining effect.

Drawings

For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic diagram of an embodiment of a vehicle;

FIG. 2 is a schematic diagram of an embodiment of a battery of the present application;

FIG. 3 is an exploded view of one embodiment of the battery of FIG. 2;

FIG. 4 is a schematic view of a part of the battery of FIG. 2 in a fixed state with a vehicle body;

FIG. 5 is a schematic view of a partial structure of an embodiment of the battery of FIG. 2;

FIG. 6 is an enlarged schematic view of an embodiment of the second corner of FIG. 3;

marking:

a battery 1, a vehicle body 2, a controller 3, and a motor 5;

a housing 10, a cell assembly 12, a first seal 14, a second seal 16;

top plate 100, bottom plate 102, side plate 104, thermal management component 120, first closed cavity 140, second closed cavity 160, main body portion 142, boss 144, first corner 146, first sub-seal 148, second corner 162, second sub-seal 164;

a middle region 1020 and an edge region 1022;

a length direction X, a width direction Y and a height direction Z.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

At present, from the market development prospect and application trend, the battery has the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, and is widely used in various fields. The device is applied to various energy storage power supply systems such as hydraulic power, firepower, wind power, solar power stations and the like, and provides power for high-power devices, such as electric bicycles, electric motorcycles, electric automobiles and the like, and various fields such as military equipment, aerospace and the like.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a vehicle. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like. The battery 1 is provided in the interior of the vehicle, and the battery 1 may be fixedly provided on the body of the vehicle, for example, the battery 1 is fixedly provided on the bottom or the head or the tail of the body of the vehicle. The battery 1 may be used to power a vehicle, for example, the battery 1 may be used as an operating power source for the vehicle. The vehicle may further comprise a controller 3 and a motor 5, the controller 3 being arranged to control the battery 1 to power the motor 5, for example for operating power requirements during start-up, navigation and driving of the vehicle. The battery 1 may be used not only as an operating power source of a vehicle but also as a driving power source of the vehicle, instead of or in part instead of fuel oil or natural gas, to supply driving power to the vehicle.

The inventors of the present application found during long-term studies that, on the one hand, in order to ensure that the battery 1 can be smoothly assembled to the vehicle body, a gap is left between the battery 1 and the vehicle body in the prior art; on the other hand, a gap is left between the bottom plate and the battery cell assembly during the assembly of the battery 1 itself. In the running process of the vehicle, the air flows at the gap position at a higher speed, so that the battery 1 has poorer heat insulation performance and is easy to generate noise.

In order to solve the above-mentioned technical problems, please refer to fig. 2 and 3, fig. 2 is a schematic structural diagram of an embodiment of the battery of the present application, and fig. 3 is an exploded schematic diagram of an embodiment of the battery of fig. 2. The battery 1 includes a housing 10, a cell assembly 12 (not shown in fig. 2, as shown in fig. 3), a first seal 14, and a second seal 16 (not shown in fig. 2, as shown in fig. 3). Wherein the housing 10 includes a top plate 100 and a bottom plate 102 disposed opposite to each other; alternatively, it may be defined that the battery 1 includes a longitudinal direction X, a width direction Y, and a height direction Z that are perpendicular to each other in pairs, and that when the battery 1 is mounted with the vehicle body, the longitudinal direction of the vehicle body (i.e., the traveling direction of the vehicle) is parallel to the longitudinal direction X of the battery 1, and the width direction of the vehicle body is parallel to the width direction Y of the battery 1. The top plate 100 and the bottom plate 102 may be disposed opposite to each other in the height direction Z at intervals. The battery cell assembly 12 is located inside the housing 10. The first sealing member 14 is located on the side of the top plate 100 away from the bottom plate 102, and as shown in fig. 4, fig. 4 is a schematic view showing a partial structure of the battery and vehicle body fixing embodiment in fig. 2, where the side of the first sealing member 14 away from the top plate 100 is used for abutting against the vehicle body 2. Fig. 5 is a partial schematic structure of an embodiment of the battery of fig. 2, as shown in fig. 5. The second seal 16 is located between the cell assembly 12 and the base plate 102.

Specifically, the battery 1 refers to a physical module including one or more battery cells to supply electric power. The battery 1 generally includes a housing 10 for enclosing one or more battery cells, the housing 10 being capable of preventing liquids or other foreign matter from affecting the charging or discharging of the battery cells. Alternatively, as shown in fig. 2 and 3, the housing 10 may further include, in addition to the top plate 100 and the bottom plate 102, a side plate 104 located between the top plate 100 and the bottom plate 102, the side plate 104 being annular, and the top plate 100, the bottom plate 102 and the side plate 104 cooperating with each other to form a receiving space in which the battery cell assembly 12 may be disposed.

Further, the battery unit assembly 12 may include one or more battery units (not shown), which may be a secondary battery or a primary battery, or may be a lithium ion battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in this application. And the battery cell may have a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, without limitation. When the battery cell assembly 12 includes a plurality of battery cells, the plurality of battery cells may be arranged in the same layer in the height direction Z, and the surfaces of two battery cells disposed adjacently in the length direction X or the width direction Y may be fixedly connected by an adhesive layer. In addition, as shown in fig. 3, the battery cell assembly 12 may further include a thermal management component 120 in addition to the battery cells, wherein a plurality of battery cells may be disposed on a side of the thermal management component 120 facing away from the base plate 102. The heat management component 120 is provided with a heat exchange channel, when the working temperatures of the battery monomers exceed a first threshold value, the temperature of the battery monomers can be reduced through the heat management component 120, so that chain reaction caused by thermal runaway of the single battery monomer is prevented, and the safety of the battery 1 is improved; when the working temperatures of the plurality of battery cells are lower than the second threshold, the plurality of battery cells can be heated by the thermal management component 120 to ensure that the battery cells can work normally; wherein the first threshold is greater than the second threshold. Alternatively, a mixed liquid of water and glycol may be contained in the heat exchange channel.

When the battery 1 is fixed to the vehicle body, as shown in fig. 4, both sides of the first seal member 14 may be provided with adhesive layers (not shown) respectively in the height direction Z so that the first seal member 14 can be fixedly disposed between the roof panel 100 and the vehicle body 2, and the probability of displacement of the first seal member 14 between the roof panel 100 and the vehicle body 2 during running of the vehicle is reduced.

When the battery 1 is assembled, as shown in fig. 5, both sides of the second seal 16 may be provided with adhesive layers (not shown) respectively in the height direction Z so that the second seal 16 can be fixedly disposed between the bottom plate 102 and the battery cell assembly 12, and the probability of displacement of the second seal 16 between the bottom plate 102 and the battery cell assembly 12 during running of the vehicle is reduced.

It can be seen that, on the one hand, by introducing the first seal 14 between the roof panel 100 and the vehicle body 2, the amount of air entering between the vehicle body 2 and the roof panel 100 during the running of the vehicle is reduced due to the blocking effect of the first seal 14, and thus the noise generated by the air therein is reduced; and when the air is cold and the battery 1 needs to be insulated, the heat exchange between the air and the battery 1 is reduced and the insulation effect of the battery 1 is enhanced because the amount of air entering between the vehicle body 2 and the top plate 100 is reduced. On the other hand, by introducing the second seal 16 between the bottom plate 102 and the battery cell assembly 12, the amount of air entering between the bottom plate 102 and the battery cell assembly 12 during the running of the vehicle is reduced due to the blocking effect of the second seal 16, thereby reducing noise generated by the air therein; and when the air is cold and the battery 1 needs to be insulated, the heat exchange between the air and the battery 1 is reduced and the heat insulation effect of the battery 1 is enhanced because the amount of air entering between the bottom plate 102 and the battery cell assembly 12 is reduced. In short, the synergistic effect of the two aspects can make the whole heat preservation effect of the battery 1 stronger and the noise lower.

In some embodiments, in the longitudinal direction of the vehicle body (i.e., in the longitudinal direction X of the battery 1 in fig. 2), the vehicle body includes a head, and the first seal 14 includes a portion (as indicated by a broken line frame in fig. 2) that is disposed adjacent to the head and extends in the width direction of the vehicle body (i.e., in the width direction Y of the battery in fig. 2). In the traveling direction of the vehicle (i.e., in the longitudinal direction of the vehicle body), air generally enters from the head position, and when the first seal 14 includes a portion that is provided adjacent to the head and extends in the width direction of the vehicle body, the portion can block most of the air from entering, to reduce noise and improve the heat retaining effect.

Alternatively, as shown in fig. 2, 3 and 4, the first sealing member 14 is annular, so that the roof panel 100 and the vehicle body 2 form a first closed cavity 140 at the position of the first sealing member 14. The first sealing member 14 may have any annular structure such as a circular ring, a racetrack, a polygon, etc., and may be specifically disposed according to the clearance between the vehicle body and the roof panel 100. The specific position of the first sealing member 14 on the top plate 100 is not strictly limited, and the area enclosed by the first sealing member 14 may be as large as possible on the premise that the first sealing member 14 does not affect the mounting and fixing of the vehicle body and the battery 1. Further, after the first sealing member 14 abuts against the vehicle body 2 and the top plate 100, the area enclosed by the first sealing member 14 is closed to form a first closed cavity 140, at this time, the probability of external air entering the first closed cavity 140 is reduced, and thus noise generated by the air at the place is reduced; and when the air is colder and the heat preservation of the battery 1 is needed, the heat exchange between the air and the battery 1 is reduced, and the heat preservation effect of the battery 1 is enhanced.

Of course, in other embodiments, the first sealing member 14 may be non-annular, for example, in a strip shape, etc., which may be only the structure of the portion shown by the dashed box in fig. 2. In some embodiments, the first seal 14 is an elastic member, and the first seal 14 is compressively disposed between the roof panel 100 and the vehicle body 2 when the battery 1 is fixed with the vehicle body 2. Alternatively, the material of the first sealing member 14 may include foam, rubber, or the like. When the battery 1 receives a certain impact force in the height direction Z, the first sealing piece 14 made of elastic materials can play a certain role in stress buffering; and when the first sealing member 14 is annular, the elastic member may be designed in such a way that the sealing effect of the formed first sealed cavity 140 is better.

Alternatively, when the battery 1 is fixed to the vehicle body 2, the compression amount of the first seal 14 is 10% -30% (e.g., 15%, 20%, 25%, etc.); wherein the first sealing member 14 has a first thickness a1 before being compressed, and the first sealing member 14 has a second thickness b1 after being compressed, and the compression amount is a ratio of a thickness difference between the first thickness a1 and the second thickness b1 to the first thickness a1, expressed as: the compression amount of the first seal 14= (a 1-b 1)/a 1. The above-described control range of the compression amount of the first seal 14 can reduce damage to the top plate 100 by the reaction force of the first seal 14, and can secure the sealing effect when the first seal 14 is annular.

Alternatively, as shown in fig. 4, in the direction approaching the vehicle body 2 (i.e., the direction away from the floor), the roof 100 is convex, and at this time, the liquid such as external rainwater may flow directly to the outside of the battery 1 along the convex roof 100, so as to reduce the probability of rainwater entering the inside of the battery 1, and to improve the lifetime of the battery 1.

In some embodiments, as shown in fig. 2, the first seal 14 includes a main body portion 142 and at least one boss portion 144 disposed in a stack on a side of the main body portion 142 facing away from the top plate 100; alternatively, when the first seal 14 is annular, the body portion 142 is annular; when the battery 1 is fixed to the vehicle body 2, the distance between the roof panel 100 and the vehicle body 2 corresponding to the position where the boss 144 is provided is larger than the distance between the roof panel 100 and the vehicle body 2 corresponding to the position where the main body 142 where the boss 144 is not provided.

That is, the distance between the vehicle body 2 and the roof panel 100 is not uniform in the height direction Z, and there are large places and small places; the main body portion 142 is provided with a protruding portion 144 at a position corresponding to a larger pitch, and one side of the protruding portion 144 facing away from the main body portion 142 is abutted against the vehicle body 2; the body portion 142 is directly abutted against the vehicle body 2 at a position where the boss portion 144 is not provided on the body portion 142 at a relatively small pitch.

The design way not only can reduce the cost of the first sealing piece 14, but also can enable the compression amount of the first sealing piece 14 at the positions with larger spacing and smaller spacing to be approximately the same, so that the stress of the first sealing piece 14 is uniform, the probability of stress concentration of the first sealing piece 14 is low, and the probability of fracture of the first sealing piece 14 is low.

Alternatively, the body portion 142 and the boss portion 144 may be integrally formed therebetween; alternatively, the body portion 142 and the boss portion 144 may be fixedly coupled by an adhesive layer.

Alternatively, in the height direction Z, the shape of the convex portion 144 may be a truncated pyramid or a prism or the like. And an orthographic projection of the boss 144 onto the body portion 142 may be located within the body portion 142. Preferably, in the radial direction of the body portion 142, the width d1 of the body portion 142 is the same as the width d2 of the boss portion 144. The boss 144 has a simpler structural design, is easy to manufacture and form, and has lower cost.

In some embodiments, referring still to FIG. 2, when the first seal 14 is annular, the first seal 14 includes at least one first corner 146, and the first corner 146 is arcuate. The design of the first corner 146 can reduce the probability of generating stress concentration points of the first corner 146 and reduce the probability of breakage of the first corner 146.

Alternatively, as shown in fig. 2, the first sealing member 14 includes a plurality of first sub-sealing members 148 extending in a straight line, and two adjacent first sub-sealing members 148 are connected by one first corner 146, and the extending directions of the two adjacent first sub-sealing members 148 intersect each other. Preferably, the extending directions of the adjacent two first sub-seals 148 are perpendicular to each other. The structural design of the first seal 14 is relatively simple. Optionally, a plurality of first sub-seals 148 are integrally formed with the first corner 146.

In some embodiments, as shown in fig. 3, in the longitudinal direction of the vehicle body (i.e., in the longitudinal direction X of the battery 1 in fig. 3), the vehicle body includes a vehicle head, and the second seal 16 includes a portion (i.e., a portion shown by a broken line frame in fig. 3) that is disposed adjacent to the vehicle head and extends in the width direction of the vehicle body (i.e., in the width direction Y of the battery in fig. 3). In the traveling direction of the vehicle (i.e., in the longitudinal direction of the vehicle body), air generally enters from the head position, and when the second seal 16 includes a portion that is provided adjacent to the head and extends in the width direction of the vehicle body, the portion can block most of the air from entering, to reduce noise and improve the heat retaining effect.

Alternatively, as shown in fig. 3 and 5, the second seal 16 is annular such that the base plate 102 and the cell assembly 12 form a second closed cavity 160 at the location of the second seal 16. The second seal 16 may have any configuration, such as annular, racetrack, polygonal, etc., and may be specifically configured according to the clearance between the cell assembly 12 and the base plate 102. The specific position of the second sealing member 16 on the bottom plate 102 is not strictly limited, and the area enclosed by the second sealing member 16 may be as large as possible on the premise that the second sealing member 16 does not affect the mounting and fixing of the battery cell assembly 12 and the bottom plate 102. Further, after the second sealing member 16 abuts against the bottom plate 102 and the battery cell assembly 12, the area surrounded by the second sealing member 16 is closed to form a second closed cavity 160, at this time, the probability of the external air entering the second closed cavity 160 is reduced, so that the noise generated by the air at the place is reduced; and when the air is cold and the battery 1 needs to be insulated, the heat exchange between the air and the battery 1 is reduced and the insulation effect of the battery 1 is enhanced because the probability of air entering the second closed cavity 160 is reduced.

Of course, in other embodiments, the second seal 16 may be non-annular, e.g., bar-shaped, etc., which may be merely the configuration of the portion shown in phantom in fig. 3.

In some embodiments, referring to fig. 3, the second seal 16 is an elastic member, and the second seal 16 is compressively disposed between the base plate 102 and the cell assembly 12. Alternatively, the material of the second sealing member 16 may include foam or the like. When the battery 1 receives a certain impact force in the height direction Z, the second sealing piece 16 made of elastic materials can play a certain role in stress buffering; and when the second sealing member 16 is annular, the elastic member may be designed to have a better sealing effect on the formed second airtight cavity 160.

Optionally, the second seal 16 has a compression of 40% -60% (e.g., 45%, 50%, 55%, etc.); the second sealing member 16 has a third thickness a2 before being compressed, and the second sealing member 16 has a fourth thickness b2 after being compressed, wherein the compression amount is a ratio of a difference between the third thickness a2 and the fourth thickness b2 to the third thickness a2, and is expressed as a formula: the second seal 16 compresses by an amount= (a 2-b 2)/a 2. The above-described control range of the compression amount of the second seal 16 can reduce damage to the battery cell assembly 12 and the bottom plate 102 by the reaction force of the second seal 16; and when the second sealing member 16 is annular, the sealing effect can be ensured.

Alternatively, as shown in fig. 3, the battery cell assembly 12 includes a plurality of battery cells (not shown) and a thermal management component 120; the plurality of battery cells in fig. 3 may be located in the area surrounded by the side plate 104, and the plurality of battery cells in fig. 3 are not illustrated because the line of sight of the side plate 104 is blocked. A plurality of battery cells are disposed on a side of the thermal management component 120 facing away from the base plate 102, and the second seal 16 is disposed between the thermal management component 120 and the base plate 102. The above-mentioned thermal management component 120 may perform a cooling process when the operating temperature of the battery cell exceeds a first threshold value, so as to prevent a chain reaction caused by thermal runaway of the single battery cell, thereby improving the safety of the battery 1; and the battery unit can be heated when the working temperature of the battery unit is lower than a second threshold value, so that the battery unit can work normally; wherein the first threshold is greater than the second threshold. Further, the arrangement of the second seal 16 between the thermal management component 120 and the base plate 102 may reduce the probability of air entering from the gap between the thermal management component 120 and the base plate 102, reducing heat dissipation and noise between the thermal management component 120 and the base plate 102.

Further, as shown in fig. 5, the bottom plate 102 includes a middle region 1020 and an edge region 1022 surrounding the middle region 1020, and the middle region 1020 is far from the top plate with respect to the edge region 1022; i.e. the bottom plate 102 is now concave in figure 5. At this time, the second seal 16 is disposed between the thermal management component 120 and the edge region 1022. The bottom plate 102 with the concave design can prevent the damage of external force to the battery cell assembly 12; and the second seal 16 is disposed between the thermal management component 120 and the edge region 1022, the probability of external rain water or the like entering the relatively concave intermediate region 1020 and accumulating within the intermediate region 1020 can be reduced.

On this basis, when the compression amount of the second sealing member 16 is 40% -60%, the second sealing member 16 of a larger compression amount can play a better role in waterproof sealing so as to reduce the probability of external rainwater and the like entering the inside of the battery 1.

In some embodiments, when the second seal 16 is annular, the second seal 16 includes at least one second corner 162, as shown in fig. 6, and fig. 6 is an enlarged schematic view of one implementation of the second corner 162 in fig. 3, where the second corner 162 is arcuate. The design of the second corner 162 can reduce the probability of generating stress concentration points in the second corner 162 and reduce the probability of breakage of the second corner 162.

Alternatively, as shown in fig. 3, the second sealing member 16 includes a plurality of second sub-sealing members 164 extending in a straight line, and two adjacent second sub-sealing members 164 are connected by one second corner 162, and the extending directions of the two adjacent second sub-sealing members 164 intersect each other. The structural design of the second seal 16 is relatively simple. Optionally, a plurality of second sub-seals 164 are integrally formed with the second corner 164.

In addition, the application also provides a vehicle, which comprises a vehicle body and the battery fixedly arranged on the vehicle body.

In some embodiments, the vehicle body includes a head in a length direction of the vehicle body, and the first seal and/or the second seal includes a portion (e.g., a portion shown by a dashed box in fig. 2 and 3) disposed adjacent to the head and extending in a width direction of the vehicle body. In the traveling direction of the vehicle (i.e., in the length direction of the vehicle body), air generally enters from the head position, and when the first seal and/or the second seal include a portion that is disposed adjacent to the head and extends in the width direction of the vehicle body, the portion can block a large portion of the air from entering to reduce noise and improve the heat retaining effect.

In a specific application scenario, please refer to fig. 3 again, in this application, by adding a sealing element (also referred to as a wind shielding strip) at the matching position of the top plate and the vehicle body of the battery and the matching position of the bottom plate and the battery unit component, the air flowing into the battery or between the battery and the vehicle body during the running process of the vehicle can be reduced, the noise is reduced, and the heat insulation performance is improved.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims

1. A battery for fixing to a vehicle body of a vehicle, the battery comprising:

the shell comprises a top plate and a bottom plate which are oppositely arranged;

the battery cell assembly is positioned inside the shell;

the first sealing piece is positioned on one side, away from the bottom plate, of the top plate, and one side, away from the top plate, of the first sealing piece is used for being abutted with the vehicle body;

and a second seal positioned between the cell assembly and the base plate.

2. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the first sealing member is an elastic member, and when the battery is fixed with the vehicle body, the first sealing member is compressed and arranged between the top plate and the vehicle body.

3. The battery of claim 2, wherein the battery is configured to provide the battery with a plurality of cells,

when the battery is fixed with the vehicle body, the compression amount of the first sealing element is 10% -30%; the first sealing piece is provided with a first thickness before being compressed, the first sealing piece is provided with a second thickness after being compressed, and the compression amount is the ratio of the difference value of the first thickness and the second thickness to the first thickness.

4. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the second sealing member is an elastic member, and the second sealing member is compressively disposed between the bottom plate and the battery cell assembly.

5. The battery of claim 4, wherein the battery is provided with a plurality of electrodes,

the compression amount of the second sealing element is 40% -60%; the second sealing piece is compressed and then has a fourth thickness, and the compression amount is the ratio of the difference value of the third thickness and the fourth thickness to the third thickness.

6. The battery according to claim 4 or 5, wherein,

the battery cell assembly includes a plurality of battery cells and a thermal management component; wherein, a plurality of battery cells set up in thermal management part deviates from bottom plate one side, and the second sealing member set up in thermal management part with between the bottom plate.

7. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

the bottom plate comprises a middle area and an edge area which is arranged around the periphery of the middle area in a surrounding mode, and the middle area is far away from the top plate relative to the edge area;

wherein the second seal is disposed between the thermal management component and the edge region.

8. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the first sealing piece is annular, so that a first closed cavity is formed by the top plate and the vehicle body at the position of the first sealing piece;

and/or the second sealing member is annular, so that the bottom plate and the battery cell assembly form a second airtight cavity at the position of the second sealing member.

9. The battery of claim 8, wherein the battery is configured to provide the battery with a battery cell,

the first seal and/or the second seal comprises at least one corner, the corner being arcuate.

10. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the first sealing element comprises a main body part and at least one protruding part which is arranged on one side of the main body part away from the top plate in a stacking way;

when the battery is fixed with the vehicle body, the distance between the top plate corresponding to the position of the protruding part and the vehicle body is larger than the distance between the top plate corresponding to the position of the main body part, where the protruding part is not arranged, and the vehicle body.

11. A vehicle, characterized by comprising:

a vehicle body and the battery of any one of claims 1-10, and the battery is fixedly disposed on the vehicle body.

12. The vehicle of claim 11, wherein the vehicle is further characterized by,

in the length direction of the vehicle body, the vehicle body comprises a vehicle head, and the first sealing member and/or the second sealing member comprises a portion which is arranged adjacent to the vehicle head and extends along the width direction of the vehicle body.