Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack. The battery comprises a shell and a top cover plate, the shell is provided with a containing cavity, and the top cover piece is connected with the shell and covers the containing cavity. The top cover piece comprises a body and a reinforcing part; the body is connected with the shell and provided with a channel, the channel penetrates through the body in the thickness direction of the body, and the channel communicates with the containing cavity; the reinforcing part is connected to one side face of the body and covers the channel. According to the battery disclosed by the invention, the channel is formed in the top cover plate, and the reinforcing part is arranged on one side surface of the body to seal the channel, so that the strength of the top cover plate can be ensured on the basis of thinning the top cover plate and reducing the overall weight of the battery, and the effect of inhibiting the deformation of the top cover plate is achieved; and the weight of the top cover sheet is increased without a superfluous structure, so that the light weight of the battery is facilitated.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery and a battery pack. Background Art

[0002] As an important structure of the power battery, the top cover sheet plays the role of sealing the battery shell. The top cover sheet is usually a planar structure. Under working conditions such as inflation deformation, its rigidity can only be increased by increasing the thickness of the top cover sheet, which will increase the overall weight of the battery and fail to achieve battery lightweighting. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery, aiming to solve the problem that the existing method of increasing the thickness of the top cover sheet to increase its rigidity cannot achieve battery lightweighting; another purpose of the embodiment of the present application is to provide a battery pack.

[0004] Technical solution: A battery according to an embodiment of the present application includes:

[0005] A housing having a receiving cavity;

[0006] A top cover sheet, the top cover sheet is connected to the shell and covers the accommodating cavity; the top cover sheet includes:

[0007] A body, the body being connected to the shell; the body having a channel, the channel penetrating the body along the thickness direction of the body, the channel being communicated with the accommodating cavity;

[0008] A reinforcing portion is connected to a side surface of the main body and covers the channel.

[0009] In some embodiments, the reinforcement portion comprises:

[0010] A boss, the boss is arranged around the channel and connected to the body; the boss encloses a buffer space, and the buffer space is communicated with the channel;

[0011] A cover plate is connected to a side of the boss away from the body and covers the buffer space.

[0012] In some embodiments, the top cover sheet further includes a functional component, the functional component is connected to the body, and the channel is annular and is arranged around the functional component.

[0013] In some embodiments, the top cover sheet further includes a functional component, and the functional component is connected to the body; the functional component includes poles and a pressure relief member that are spaced apart, and the channel is located between the poles and the pressure relief member.

[0014] In some embodiments, there are a plurality of channels, one of which is located on a side of the pole away from the pressure relief member.

[0015] In some embodiments, there are multiple channels, and at least two of the channels are arranged adjacent to each other; and of the two reinforcing parts that cover the two adjacent channels, one is connected to the side of the body close to the accommodating cavity, and the other is connected to the side of the body away from the accommodating cavity.

[0016] In some embodiments, the battery has a height direction, and along the height direction, the size of the body is H1 mm, and the size of the cover plate is H2 mm, satisfying: H1=H2.

[0017] In some embodiments, H1 and H2 satisfy: 1.5≤H1=H2≤2.5.

[0018] In some embodiments, the battery has a height direction, and along the height direction, the dimension of the reinforcing portion is H3 mm, satisfying: 1.5≤H3≤3.2.

[0019] In some embodiments, the reinforcement portion is located on a side of the body facing away from the accommodating cavity.

[0020] In some embodiments, the top cover sheet is an integral structure.

[0021] Accordingly, a battery pack described in an embodiment of the present application includes a battery described in any one of the aforementioned embodiments.

[0022] Beneficial effects: Compared with the prior art, a battery according to an embodiment of the present application includes a shell and a top cover sheet; the shell has a receiving cavity, the top cover sheet is connected to the shell and covers the receiving cavity; the top cover sheet includes a body and a reinforcement portion; the body is connected to the shell, the body has a channel, the channel penetrates the body along the thickness direction of the body, and the channel is connected to the receiving cavity; the reinforcement portion is connected to one side of the body and covers the channel. The battery of the present application, by providing a channel on the top cover sheet and providing a reinforcement portion on one side of the body to seal the channel, can ensure the strength of the top cover sheet on the basis of thinning the top cover sheet to reduce the overall weight of the battery, and play a role in suppressing the deformation of the top cover sheet. At the same time, the portion of the body corresponding to the reinforcement portion is a through channel, and there is no redundant structure to increase the weight of the top cover sheet, which is conducive to lightweighting the battery.

[0023] Compared with the prior art, a battery pack according to an embodiment of the present application includes a battery according to any one of the above embodiments. It is understandable that the battery pack according to the embodiment of the present application has all the features and technical effects of the battery according to the above embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic structural diagram of a battery according to an embodiment of the present application;

[0026] Figure 2 is a front view of a battery according to an embodiment of the present application;

[0027] Figure 3 is a side view of a battery according to an embodiment of the present application;

[0028] Figure 4 is a top view of a battery according to an embodiment of the present application;

[0029] Figure 5 yes Figure 1 A magnified view of part A;

[0030] Figure 6 is a schematic structural diagram of a battery in a second embodiment of the present application;

[0031] Figure 7 is a front view of a battery according to a second embodiment of the present application;

[0032] Figure 8 is a side view of a battery according to a second embodiment of the present application;

[0033] Fig. 9 is a top view of a battery according to a second embodiment of the present application;

[0034] Fig.10 is a front cross-sectional view of a battery according to a second embodiment of the present application;

[0035] Fig.11 yes Fig.10 Enlarged view of part C;

[0036] Fig.12 is a side cross-sectional view of a battery according to a second embodiment of the present application;

[0037] Fig.13 yes Fig.12 A magnified view of part D in the middle;

[0038] Fig.14 is a top view of a battery according to a third embodiment of the present application;

[0039] Fig.15 is a schematic diagram of the structure of a battery according to a fourth embodiment of the present application;

[0040] Fig.16 is a front view of a battery according to a fourth embodiment of the present application;

[0041] Fig.17 is a side view of a battery according to a fourth embodiment of the present application;

[0042] Fig.18 is a top view of a battery according to a fourth embodiment of the present application;

[0043] Fig.19 is a front cross-sectional view of a battery according to a fourth embodiment of the present application;

[0044] Fig. 20 yes Fig.19 Enlarged view of part E in the middle;

[0045] Fig.21 It is a side cross-sectional view of the battery of the fourth embodiment of the present application.

[0046] Figure numerals: 1, shell; 11, accommodating cavity; 2, top cover plate; 21, main body; 22, channel; 23, reinforcement part; 231, boss; 232, cover plate; 233, buffer space; 24, functional component; 241, pole; 242, pressure relief part; X, height direction. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0049] It should also be noted that the arrow marked X in the drawings of the present application indicates the height direction X. In the embodiment of the present application, the height direction X is the direction of the shell 1 toward the top cover sheet 2. The height direction X is introduced to facilitate the description of the structural position relationship of the various components of the battery, thereby facilitating the understanding of its structure.

[0050] The applicant noted that a square battery generally includes a shell 1, a top cover sheet 2 and a functional component 24, wherein the surface of the top cover sheet 2 is usually flat. Under working conditions such as inflation deformation, its rigidity can only be increased by increasing the thickness of the top cover sheet 2, thereby increasing the production cost and the weight of the battery, which is not conducive to the current lightweighting of batteries.

[0051] In view of this, an embodiment of the present application provides a battery, by providing a reinforcement portion 23 on the top cover sheet 2, and hollowing out the portion of the top cover sheet 2 corresponding to the reinforcement portion 23, so that the rigidity of the top cover sheet 2 can be improved on the basis of minimizing the increase in battery weight, thereby effectively suppressing deformation under working conditions such as inflation deformation, and is conducive to lightweighting the battery.

[0052] like Figure 1-Figure 21As shown, a battery of an embodiment of the present application includes a shell 1 and a top cover sheet 2; the shell 1 has a accommodating cavity 11, and the top cover sheet 2 is connected to the shell 1 and covers the accommodating cavity 11; the top cover sheet 2 includes a main body 21 and a reinforcing portion 23; the main body 21 is connected to the shell 1, and the main body 21 has a channel 22, which penetrates the main body 21 along the thickness direction of the main body 21, and the channel 22 is connected to the accommodating cavity 11; the reinforcing portion 23 is connected to one side of the main body 21 and covers the channel 22.

[0053] In the embodiment of the present application, the battery can be a square battery, the housing cavity 11 of the shell 1 is used to accommodate the battery cell components and electrolyte, etc., and the top cover sheet 2 covers the housing cavity 11 to achieve the encapsulation of the battery cell components and electrolyte in the closed space between the shell 1 and the top cover sheet 2. The top cover sheet 2 of the present application includes a body 21 and a reinforcement portion 23, and the reinforcement portion 23 is connected to one side of the body 21. At this time, the reinforcement portion 23 can be connected to the side of the body 21 facing the housing cavity 11, or it can be connected to the side of the body 21 away from the housing cavity 11, which can improve the deformation resistance of the body 21 under the inflation deformation condition of the body 21.

[0054] In addition, in the embodiment of the present application, a channel 22 is provided at a position on the body 21 opposite to the reinforcing portion 23, and the reinforcing portion 23 covers the channel 22. This structural arrangement, on the one hand, can make the portion of the body 21 opposite to the reinforcing portion 23 present a hollow structure, further reducing the material usage of the body 21, thereby reducing the weight of the body 21, so that the combination of the body 21 and the reinforcing portion 23 will not increase the weight of the top cover as a whole, which is beneficial to the lightweight of the battery while ensuring the strength; on the other hand, by using the reinforcing portion 23 to cover the channel 22, when the top cover sheet 2 is connected to the shell 1, the sealing performance of the top cover sheet 2 as a whole is ensured, and the overall working performance of the top cover sheet 2 is not affected while achieving the strengthening of the structural rigidity and reducing the weight.

[0055] It should be noted that, in the embodiment of the present application, a channel 22 is arranged on the main body 21, and then a reinforcement portion 23 is arranged to seal the channel 22. At this time, if the main body 21 is subjected to a deformation force, the deformation force will directly change the direction of force transmission after reaching the position of the channel 22, and will be transmitted to the reinforcement portion 23. The reinforcement portion 23 is used to absorb energy, thereby reducing the deformation bulge caused by local stress concentration of the main body 21, thereby effectively reducing the deformation of the main body 21.

[0056] It should also be noted that in the embodiment of the present application, the thickness direction of the body 21 is the same as the height direction X of the battery. Therefore, the channel 22 penetrates the body 21 in the thickness direction of the body 21, that is, the channel 22 penetrates the body 21 in the height direction X of the battery.

[0057] In some embodiments, the reinforcing portion 23 includes a boss 231 and a cover plate 232. The boss 231 is arranged around the channel 22 and is connected to the body 21. The boss 231 encloses a buffer space 233, and the buffer space 233 is connected to the channel 22. The cover plate 232 is connected to the side of the boss 231 away from the body 21 and covers the buffer space 233.

[0058] In the embodiment of the present application, the boss 231 is used to enclose a buffer space 233, and the cover plate 232 is used to cover the end of the boss 231 away from the body 21. At this time, the cover plate 232 is correspondingly raised by the boss 231, and the boss 231 extends along the height direction X of the battery. When the body 21 is subjected to the inflation deformation force, the deformation force first propagates in the body 21, changes direction after reaching the channel 22, and propagates along the circumference and height direction X of the boss 231. At this time, the boss 231 is at a certain angle to the body 21, realizing the change of the direction of the force, and the deformation force in the boss 231 is then propagated to the cover plate 232, realizing another change in the direction of the force. In this case, since the extension direction of the boss 231 is different from the extension direction of the main body 21, when the deformation force exerted on the main body 21 drives the main body 21 to deform, the deformation of the main body 21 is effectively reduced due to the support and inhibition effect of the boss 231, and part of the deformation force exerted on the boss 231 is also supported and inhibited by the cover plate 232, which effectively reduces the possibility of deformation of the boss 231. Therefore, the reinforcement portion 23 of this structure not only further reduces the weight of the reinforcement portion 23, but also can effectively ensure the strength of the entire top cover sheet 2, thereby playing a good role in inhibiting the deformation of the top cover sheet 2.

[0059] In addition, it should be noted that the embodiment of the present application can provide more space for accommodating gas by setting the channel 22 and the buffer space 233, and on the other hand, it also has a certain buffering and energy-absorbing effect.

[0060] It should also be noted that lightweight buffering and energy-absorbing materials (not shown in the figure) can also be filled in the channel 22 and the buffer space 233, which can further achieve the effect of buffering and energy-absorbing, and further suppress the deformation of the top cover sheet 2. The buffering and energy-absorbing materials can be fixed in the channel 22 and the buffer space 233 by gluing.

[0061] like Figure 1-Figure 5 As shown, in one embodiment, the top cover sheet 2 also includes a functional component 24, the functional component 24 is connected to the body 21, and the channel 22 is annular and arranged around the functional component 24. It should be noted that the functional component 24 can include one or more of a pressure relief part, a liquid injection part, and a pole.

[0062] In this embodiment, the channel 22 is annular, and the corresponding reinforcement part 23 is also annular. At this time, the reinforcement part 23 is arranged around the functional component 24. By utilizing the annular channel 22 and the reinforcement part 23, when the main body 21 is subjected to the internal inflation deformation force, both sides of the reinforcement part 23 can absorb the inflation deformation force from all directions of the main body 21, thereby achieving a large range of absorption of the inflation deformation force and effectively suppressing the deformation of the main body 21.

[0063] like Figure 6-Figure 13 As shown, in one embodiment, the top cover sheet 2 also includes a functional component 24, which is connected to the body 21; the functional component 24 includes a pole 241 and a pressure relief member 242, the pole 241 and the pressure relief member 242 are arranged at intervals, and the channel 22 is located between the pole 241 and the pressure relief member 242.

[0064] In this embodiment, the channel 22 is in the shape of an elongated strip, a curved line, or a broken line. Since the edge of the main body 21 is connected to the shell 1, the deformation of the edge of the main body 21 will be suppressed due to the connection with the shell 1. Therefore, when the main body 21 is subjected to the inflation deformation force, the deformation will mostly occur in the middle area of ​​the main body 21. The functional component 24 is also usually arranged in the middle area of ​​the main body 21. Therefore, the area near the functional component 24 is prone to deformation. In this embodiment, the channel 22 and the reinforcement 23 are arranged near the functional component 24, especially between the pole 241 and the pressure relief member 242. At this time, the channel 22 and the reinforcement 23 can be used to absorb the deformation force in the middle of the main body 21, especially between the pole 241 and the pressure relief member 242, and effectively suppress the deformation of the main body 21 in this area. At this time, regardless of whether the channel 22 and the reinforcement 23 are in the shape of an elongated strip, a curved line, or a broken line, they can play a good deformation energy absorption role.

[0065] It should be noted that in the embodiment of the present application, there is usually one pressure relief piece 242 and two poles 241, which are respectively arranged on both sides of the pressure relief piece 242. Therefore, channels 22 and reinforcement parts 23 are arranged between the pressure relief piece 242 and the poles 241 on both sides, so as to achieve uniform reinforcement of the structure of the main body 21.

[0066] like Fig.14 As shown, in the third embodiment, there are multiple channels 22 , one of which is located on a side of the pole 241 away from the pressure relief member 242 .

[0067] It should be noted that there will be multiple reinforcement parts 23 corresponding to multiple channels 22. At this time, one of the channels 22 and the reinforcement part 23 are arranged on the side of the pole 241 away from the pressure relief part 242, and the other channels 22 and the corresponding reinforcement parts 23 are arranged between the pole 241 and the pressure relief part 242, so as to achieve better structural reinforcement effect, thereby achieving better effect of suppressing deformation.

[0068] like Figure 15-Figure 21 As shown, in the fourth embodiment, there are multiple channels 22, and at least two channels 22 are arranged adjacent to each other; and of the two reinforcing parts 23 that cover the two adjacent channels 22, one is connected to the side of the body 21 close to the accommodating cavity 11, and the other is connected to the side of the body 21 away from the accommodating cavity 11.

[0069] In this embodiment, the reinforcing portion 23 may be in the shape of a strip, a curve or a broken line. The two adjacent reinforcing portions 23 are oriented in opposite directions, that is, one reinforcing portion 23 is located on the side of the body 21 away from the accommodating cavity 11, and the other reinforcing portion 23 is located on the side of the body 21 facing the accommodating cavity 11. At this time, when the body 21 is subjected to the inflation deformation force, the two reinforcing portions 23 oriented in opposite directions transmit part of the inflation deformation force in two directions respectively, which will offset part of the inflation deformation force, and is more conducive to the buffering and absorption of the inflation deformation force, and effectively inhibits deformation.

[0070] In some embodiments, the battery has a height direction X. Along the height direction X, the size of the body 21 is H1 mm, and the size of the cover plate 232 is H2 mm, satisfying: H1=H2.

[0071] In this embodiment, the cover plate 232 has the same thickness as the main body 21, so that the thickness of each part of the top cover sheet 2 remains unchanged, and only the boss 231 is provided at the channel 22 to improve the strength; at the same time, the cover plate 232 has the same thickness as the main body 21, avoiding the cover plate 232 from becoming another weak area of ​​the top cover and causing direct rupture when the pressure is high.

[0072] In some embodiments, H1 and H2 satisfy: 1.5≤H1=H2≤2.5.

[0073] In the embodiment of the present application, the thickness of the body 21 and the cover plate 232 is limited to between 1.5 mm and 2.5 mm, so that the top cover sheet 2 of the present application is thinned compared to the conventional top cover sheet 2, reducing the weight of the top cover sheet 2, which is conducive to achieving lightweight batteries. On this basis, a reinforcing portion 23 is provided to maintain the rigidity of the top cover sheet 2 and avoid the top cover sheet 2 being easily deformed due to the thinning of the top cover sheet 2.

[0074] It should be noted that in the embodiment of the present application, the numerical range of H1=H2 is 1.5≤H1=H2≤2.5, that is, the numerical value can be any numerical value among 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2, 2.1, 2.2, 2.3, 2.4, 2.5, or a range value between any two numerical values.

[0075] It should also be noted that, in the embodiment of the present application, the sizes of H1 and H2 can be directly measured by length measuring tools such as vernier calipers.

[0076] In some embodiments, the battery has a height direction X, and along the height direction X, the dimension of the reinforcing portion 23 is H3 mm, satisfying: 1.5≤H3≤3.2.

[0077] In this embodiment, on the basis that the thickness of the cover plate 232 and the body 21 is equal and greater than or equal to 1.5 mm, the size of the reinforcing portion 23 is further limited, and the size of the reinforcing portion 23 is limited to between 1.5 mm and 3.2 mm. This structure ensures that the cover plate 232 is located outside the channel 22, and the direction of the deformation force is changed. On the other hand, the boss 231 has a certain height, which facilitates the boss 231 to further enhance the strength. At the same time, the size of the reinforcing portion 23 is limited to no more than 3.2 mm, and its main purpose is to prevent the height of the reinforcing portion 23 from exceeding the height of the pole 241, thereby avoiding the increase of the overall height of the battery and the increase of the battery volume, and facilitating the improvement of the battery volume energy density.

[0078] It should be noted that in the embodiment of the present application, the numerical range of H3 is 1.5≤H3≤3.2, that is, the numerical value can be any value among 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, or a range value between any two values.

[0079] It should also be noted that, in the embodiment of the present application, the size of H3 can be directly measured by a length measuring tool such as a vernier caliper.

[0080] In some embodiments, the reinforcement portion 23 is located on a side of the body 21 facing away from the accommodating cavity 11 .

[0081] In this embodiment, such a structural arrangement avoids the reinforcement portion 23 from occupying the internal space of the battery, which helps to improve the energy density of the battery while ensuring the strength of the top cover sheet 2.

[0082] In some embodiments, the top cover sheet 2 is an integrated structure.

[0083] In this embodiment, the top cover sheet 2 is an integrated structure, which can further ensure that the top cover sheet 2 has better strength as a whole, and the connection strength between the reinforcing portion 23 and the body 21 is also higher, which can further improve its overall structural strength. Among them, the top cover sheet 2 can be integrally stamped, integrally injection molded, or integrally milled.

[0084] The following specific embodiments are listed to compare the simulation results of battery inflation deformation of the present application, and it is determined that the top cover sheet 2 of the battery of the present application still has good rigidity to suppress deformation when it is thinned.

[0085] Embodiment 1: The channel 22 and the reinforcement portion 23 are annular and are disposed around the functional component 24 .

[0086] The comparison of battery inflation deformation simulation results is shown in Table 1. When the inflation pressure ranges from 0 to 0.5 MPa, the thickness of the main body 21 is 2.0 mm (without reinforcement 23), 1.5 mm (without reinforcement 23), 1.5 mm (height of the annular reinforcement 23 is 1.5 mm), and 1.5 mm (height of the annular reinforcement 23 is 2 mm). The deformation amounts are as follows. By comparing the simulation results, it can be seen that by providing an annular channel 22 on the thinned main body 21 and sealing the reinforcement 23 at the end of the annular channel 22, the deformation can be suppressed.

[0087] Table 1

[0088]

[0089] Embodiment 2: A reinforcement portion 23 is provided between the pole 241 and the pressure relief member 242 .

[0090] The comparison of battery inflation deformation simulation results is shown in Table 2. When the inflation pressure ranges from 0 to 0.5 MPa, the thickness of the top cover sheet 2 is 2.0 mm, 1.5 mm (without reinforcement 23), 1.5 mm (one reinforcement 23 on one side and the height of the reinforcement 23 is 2 mm), and 1.5 mm (two reinforcements 23 on one side and the height of the reinforcement 23 is 2 mm). The deformation is as follows. From the simulation results, it can be seen that by arranging a long strip of channel 22 on the thinned body 21, and the channel 22 is arranged on both sides of the pressure relief member 242, and the reinforcement 23 is sealed at the end of the channel 22, the deformation can be suppressed.

[0091] Table 2

[0092]

[0093] Embodiment 3: A reinforcement portion 23 is disposed between the pole 241 and the pressure relief member 242 and on a side of the pole 241 away from the pressure relief member 242 .

[0094] The comparison of battery inflation deformation simulation results is shown in Table 3. When the inflation pressure ranges from 0 to 0.5 MPa, the thickness of the main body 21 is 2.0 mm, 1.5 mm (without reinforcement 23), 1.5 mm (two reinforcements 23 on one side and the height of the reinforcement 23 is 2 mm), and 1.5 mm (three reinforcements 23 on one side and the height of the reinforcement 23 is 2 mm), one of which is located on the side of the pole 241 away from the pressure relief piece 242. The deformation is as follows. From the simulation results, it can be seen that by arranging a long strip of channel 22 on the main body 21 of the thinned top cover sheet 2, and the channel 22 is arranged on both sides of the pressure relief piece 242, and the reinforcement 23 is sealed at the end of the channel 22, the deformation can be suppressed.

[0095] Table 3

[0096]

[0097]

[0098] Embodiment 4: The reinforcement parts 23 connecting two adjacent channels 22 face in opposite directions.

[0099] The comparison of battery inflation deformation simulation results is shown in Table 4 below. When the inflation pressure ranges from 0 to 0.5 MPa, the deformation amounts of the main body 21 with a thickness of 2.0 mm (without reinforcement 23), 1.5 mm (without reinforcement 23), and 1.5 mm (a group of reinforcements 23 facing oppositely and the height of the reinforcements 23 is 2 mm) are as follows. By comparing the simulation results, it can be seen that by adding reinforcements 23 facing oppositely on the main body 21 of the thinned top cover sheet 2, the deformation can be suppressed.

[0100] Table 4

[0101]

[0102] Accordingly, a battery pack according to an embodiment of the present application includes a battery according to any one of the aforementioned embodiments.

[0103] It is understandable that the battery pack has all the technical features and beneficial effects of the aforementioned batteries, which will not be described in detail here.

[0104] It should be noted that the battery pack of the embodiment of the present application can be used for backup power supplies, electrodes, electric vehicles, electric bicycles, electric motorcycles, large batteries, etc.

[0105] In the above embodiments, the description of each embodiment has its own emphasis. For the parts not described in detail in one embodiment, please refer to the relevant description of other embodiments. It can be understood that the battery pack of the embodiment of the present application has all the features and technical effects of the battery of the above embodiment, which will not be repeated here.

[0106] The above is a detailed introduction to a battery and a battery pack provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A housing (1), wherein the housing (1) comprises a receiving cavity (11); A top cover sheet (2), the top cover sheet (2) being connected to the shell (1) and covering the accommodating cavity (11); the top cover sheet (2) comprises: A body (21), the body (21) being connected to the housing (1); the body (21) having a channel (22), the channel (22) penetrating the body (21) along a thickness direction of the body (21), the channel (22) being in communication with the accommodating cavity (11); A reinforcing portion (23), wherein the reinforcing portion (23) is connected to a side surface of the main body (21) and covers the channel (22).

2. The battery according to claim 1, characterized in that The reinforcement part (23) comprises: a boss (231), the boss (231) being arranged around the channel (22) and connected to the body (21); the boss (231) encloses a buffer space (233), and the buffer space (233) is in communication with the channel (22); A cover plate (232), the cover plate (232) is connected to a side of the boss (231) away from the body (21) and covers the buffer space (233).

3. The battery according to claim 2, characterized in that The top cover sheet (2) further comprises a functional component (24), wherein the functional component (24) is connected to the body (21), and the channel (22) is annular and is arranged around the functional component (24).

4. The battery according to claim 2, characterized in that The top cover sheet (2) further comprises a functional component (24), the functional component (24) being connected to the body (21); the functional component (24) comprises poles (241) and pressure relief components (242) arranged at intervals, and the channel (22) is located between the poles (241) and the pressure relief components (242).

5. The battery according to claim 4, characterized in that There are a plurality of channels (22), one of which is located on a side of the pole (241) away from the pressure relief member (242).

6. The battery according to claim 4, characterized in that There are a plurality of channels (22), and at least two channels (22) are arranged adjacent to each other; and of the two reinforcing parts (23) that cover the two adjacent channels (22), one is connected to a side of the body (21) close to the accommodating cavity (11), and the other is connected to a side of the body (21) away from the accommodating cavity (11).

7. The battery according to claim 2, characterized in that The battery has a height direction (X), and along the height direction (X), the size of the body (21) is H1 mm, and the size of the cover plate (232) is H2 mm, satisfying: H1=H2.

8. The battery according to claim 7, characterized in that H1 and H2 satisfy: 1.5≤H1=H2≤2.

5.

9. The battery according to claim 2, characterized in that The battery has a height direction (X), and along the height direction (X), the dimension of the reinforcing portion (23) is H3 mm, satisfying: 1.5≤H3≤3.

2.

10. The battery according to any one of claims 3 to 5, characterized in that: The reinforcement portion (23) is located on a side of the body (21) facing away from the accommodating cavity (11).

11. A battery pack, characterized in that: Comprising a battery as claimed in any one of claims 1 to 10.

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