Battery monomer, battery and electric device

Abstract

The utility model relates to a battery monomer, a battery and a power utilization device. The battery monomer at least comprises a shell and a pole. The shell comprises a shell body and a cover body, the shell body is provided with an accommodating cavity and an opening, the cover body covers the opening, and a relatively closed and relatively stable space can be provided for the interior of the battery monomer. The shell body is provided with a first wall arranged opposite to the opening in the first direction, and the first wall is the wall with the largest area in the shell body and is arranged opposite to the second wall of the cover body. The two poles are arranged on the first wall and / or the second wall, and the first direction is the thickness direction of the shell, so that the shell has a larger space for mounting the poles. Therefore, according to the battery monomer provided by the embodiment of the invention, not only can the cover body and the pole be conveniently mounted and the manufacturability of the battery monomer be improved, but also the space occupied by the battery monomer can be reduced and the thin design of the battery monomer is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery and a power consumption device. BACKGROUND

[0002] With the development of technology, consumers have higher and higher requirements for the convenience and aesthetics of electronic devices, and batteries are particularly important in electronic devices. Thin batteries have the advantages of light weight and small size, and can make the overall design of electronic devices lighter and thinner, thereby improving convenience. However, how to thin the battery while facilitating the manufacture of the battery is a problem to be solved. CONTENT OF THE INVENTION

[0003] Therefore, it is necessary to provide a battery monomer, a battery and a power consumption device to facilitate the manufacture of the battery monomer while thinning the battery monomer.

[0004] In a first aspect, an embodiment of the present application provides a battery monomer, comprising:

[0005] a shell comprising a shell body and a cover, the shell body having a receiving cavity and an opening communicating with the receiving cavity, and the cover covering the opening; the shell body has a first wall disposed opposite the opening along a first direction; the first wall is the largest wall in the shell body, and the cover has a second wall disposed opposite the first wall; and

[0006] two pole posts disposed on the first wall and / or the second wall;

[0007] The first direction is the thickness direction of the shell.

[0008] In one of the embodiments, at least one of the first wall and the second wall is provided with a recessed portion recessed toward the receiving cavity.

[0009] In one of the embodiments, at least one recessed portion is provided, the bottom walls of all the recessed portions constitute a target wall, and the two pole posts are disposed on the target wall.

[0010] The bottom wall of the recessed portion is a wall disposed toward the receiving cavity along the first direction.

[0011] In one of the embodiments, the two pole posts are disposed on the bottom wall of the same recessed portion.

[0012] In one of the embodiments, the same recessed portion in which the two pole posts are disposed is defined as a target portion, one of the first wall and the second wall in which the target portion is disposed is defined as a first target piece, and the other is defined as a second target piece.

[0013] The first target piece comprises a first part, a second part, and a third part connecting the first part and the second part; along the first direction, the distance between the first part and the second target piece is smaller than the distance between the second part and the second target piece.

[0014] The first part and the third part define a target part, and the first part constitutes a bottom wall of the target part.

[0015] In one of the embodiments, the target wall is provided with a liquid injection hole, and the battery further comprises a sealing member arranged at the liquid injection hole; and / or

[0016] The battery monomer further comprises an electrode assembly, the electrode assembly comprises a main body and two tabs arranged at one end of the main body, and the two tabs are electrically connected to the two poles in a one-to-one correspondence; at least part of the orthographic projection of the two tabs on a reference plane is located within the orthographic projection range of the target wall on the reference plane; the reference plane is a plane perpendicular to the first direction.

[0017] In one of the embodiments, the wall with the recess in the first wall and the second wall is defined as the target wall, and the component with the target wall in the shell body and the cover is defined as the target component;

[0018] The target component is an integrally formed component.

[0019] In one of the embodiments, the target wall has a first side and a second side arranged opposite along the second direction, and a third side and a fourth side arranged opposite along a third direction;

[0020] The target component comprises a third wall surrounding a target side of the target wall, and the target side is at least one of the first side, the second side, the third side and the fourth side.

[0021] The first direction, the second direction and the third direction are perpendicular to each other.

[0022] In one of the embodiments, the shell body and the cover are connected by a preset mode; the preset mode comprises at least one of metal fusion, injection molding, mechanical connection, diffusion metal connection, adhesive connection and laser sintering; and / or

[0023] The thickness of the shell along the first direction is less than or equal to 4mm, and the cover is configured as a plate, and the thickness of the cover is 0.005mm to 0.2mm; and / or

[0024] The battery monomer further comprises a pressure relief mechanism, and the pressure relief mechanism is arranged at the first wall or the second wall; and / or

[0025] At least one of the first wall and the second wall has at least one of a heat conduction layer and an electromagnetic shielding layer on the side surface away from the accommodation cavity.

[0026] In a second aspect, the embodiments of the present application provide a battery comprising the battery monomer provided by any one of the embodiments of the first aspect.

[0027] In a third aspect, the embodiments of the present application provide a power consuming device, which comprises the battery provided by any one of the embodiments of the second aspect. The battery is used to provide power for the power consuming device.

[0028] In the battery monomer, the battery and the power consuming device, the battery monomer comprises at least a shell and a pole. The shell comprises a shell body and a cover, the shell body has a receiving cavity and an opening, and the cover covers the opening to provide a relatively closed and stable space for the inside of the battery monomer. The shell body has a first wall opposite to the opening in a first direction, the first wall is the largest wall in the shell body, and the first wall is opposite to a second wall of the cover. By arranging the two poles on the first wall and / or the second wall, since the first direction is the thickness direction of the shell, the shell has more space to install the poles. Thus, the battery monomer provided by the embodiments of the present application not only facilitates the installation of the cover and the poles and improves the manufacturability of the battery monomer, but also reduces the space occupied by the battery monomer, which is beneficial to the thin design of the battery monomer. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The battery monomer provided by some embodiments of the present application is shown in a perspective structural schematic diagram.

[0030] Figure 2 The battery monomer provided by some embodiments of the present application is shown in a perspective structural schematic diagram. Figure 1 The battery monomer is shown in a partial exploded structural schematic diagram.

[0031] Figure 3 The battery monomer is shown in a partial exploded structural schematic diagram. Figure 1 The battery monomer is shown in a partial exploded structural schematic diagram.

[0032] Figure 4 The battery monomer is shown in a partial exploded structural schematic diagram. Figure 1 The battery monomer is shown in a partial exploded structural schematic diagram.

[0033] Figure 5 The battery monomer provided by some embodiments of the present application is shown in a perspective structural schematic diagram.

[0034] Figure 6 The battery monomer provided by some embodiments of the present application is shown in a perspective structural schematic diagram.

[0035] Figure 7 The battery monomer provided by some embodiments of the present application is shown in a perspective structural schematic diagram.

[0036] Figure 8 The battery provided by some embodiments of the present application is shown in a perspective structural schematic diagram.

[0037] The reference signs in the detailed description of the embodiments are as follows:

[0038] Battery monomer 100;

[0039] housing 110, housing body 111, accommodation cavity Q, opening k, first wall b1, first target piece h1, first portion p1, second portion p2, third portion p3, cover body 112, second wall b2, second target piece h2, recess a, target part t, target pole m, liquid injection hole w, first side c1, second side c2, third side c3, fourth side c4, mounting hole d;

[0040] pole 120;

[0041] sealing piece 130;

[0042] electrode assembly 140, main body 141, tab 142;

[0043] pressure relief mechanism 150;

[0044] insulation piece 180;

[0045] riveting piece 190;

[0046] battery 200;

[0047] protective battery module 210;

[0048] flexible circuit board 220;

[0049] first direction F1, second direction F2, third direction F3. DETAILED DESCRIPTION

[0050] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those described herein without departing from the spirit of the present application. It is also to be understood that the following description is only illustrative and is not intended to be limiting of the present application.

[0051] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In addition, if there are these terms "first", "second", these terms are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if there are terms "a plurality of", the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0053] In the present application, unless otherwise explicitly specified and limited, if there are terms "installation", "connection", "connection", "fixing" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] It should be noted that if an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes, and do not represent the only implementation.

[0056] Figure 1 A perspective structural schematic diagram of a battery monomer provided by some embodiments of the present application is shown; Figure 2 A perspective structural schematic diagram of a battery monomer provided by some embodiments of the present application is shown; Figure 1 A perspective structural schematic diagram of a battery monomer provided by some embodiments of the present application is shown; Figure 3 A perspective structural schematic diagram of a battery monomer provided by some embodiments of the present application is shown;

[0057] Reference is made to Figures 1-2 The battery cell 100 provided by the embodiments of the present application includes a shell 110 and two pole columns 120. In the embodiments of the present application, the thickness of the shell 110 is a first direction F1, the length direction of the shell 110 is a second direction F2, and the width direction of the shell is a third direction F3. The width direction and the length direction are not necessarily smaller than each other, and can be equal. The first direction F1, the second direction F2, and the third direction F3 are exemplary and for reference.

[0058] In the embodiments of the present application, the battery cell 100 can be a lithium ion battery, a lithium-sulfur battery, a nano-lithium ion battery, etc., and is not limited in this regard.

[0059] The shell 110 includes a shell body 111 and a cover 112. The shell 110 is a component for accommodating the electrode assembly 140 and the electrolyte, etc. mentioned below. The material of the shell body 111 can be copper, iron, steel, etc., and the material of the cover 112 can also be copper, iron, steel, etc. The materials of the shell body 111 and the cover 112 can be the same or different, and can be set according to actual conditions, and are not specifically limited herein. When the shell body 111 and the cover 112 are both made of steel, the entire battery shell 110 can have higher strength and higher impact performance, and the reliability of the battery cell 100 can be further improved.

[0060] The cover 112 is a component that closes the shell body 111 to isolate the internal environment of the battery cell 100 from the external environment. Specifically, the shell body 111 has an accommodation cavity Q and an opening k in communication with the accommodation cavity Q, and the cover 112 is fitted at the opening k. The accommodation cavity Q is used to accommodate the electrode assembly 140, the electrolyte, and other components mentioned below. The shape of the cover 112 can be adapted to the shape of the shell body 111, for example, the shell body 111 is a cuboid structure, and the cover 112 is a rectangular plate structure adapted to the shell body 111, and for another example, the shell body 111 is an irregular structure, and the cover 112 is an irregular plate structure adapted to the shell body 111.

[0061] The shell body 111 has a first wall b1 opposite the opening k along the first direction F1, and the first wall b1 is the largest wall in the shell body 111. The cover 112 has a second wall b2 opposite the first wall b1. The first direction F1 is the thickness direction of the shell 110. In this way, the space occupied by the battery cell 100 in the electrical device along the first direction F1 can be reduced, which is beneficial to the thin design of the battery cell 100.

[0062] Two pole posts 120 are arranged on the first wall b1 and / or the second wall b2. The following cases can be included: one, both pole posts 120 are arranged on the first wall b1; two, both pole posts 120 are arranged on the second wall b2; three, one pole post 120 is arranged on the first wall b1 and the other pole post 120 is arranged on the second wall b2. These cases can be set according to actual conditions, which are not limited herein. For example, as shown in Figure 1 Fig. 1, a case where both pole posts 120 are arranged on the first wall b1 is shown. The connection mode of the two pole posts 120 and the shell 110 is not limited, which can be welding, riveting or thermal compounding. Of course, other connection modes can also be used, which can be set according to actual conditions, which are not limited herein. When the two pole posts 120 are connected to the shell 110 by riveting, the shell 110 can have a mounting hole, through which the two pole posts 120 can be riveted to the shell 110. It can be understood that the two pole posts 120 are positive and negative pole posts. It should be noted that, as shown in Figure 3 for the positive pole post of the two pole posts 120, two insulating pieces 180 and a riveting piece 190 can be arranged at the mounting hole d of the shell body 111. The insulating piece 180 can be an insulating sheet, and the riveting piece 190 can be a gasket. The riveting piece 190 is used to rivet the positive pole post to the mounting hole d. One insulating sheet is arranged on the inner side of the shell body 111, and the other insulating sheet is arranged on the outer side of the shell body 111. The positive pole post is arranged on the insulating sheet on the outer side of the shell body 111, and the riveting piece 190 is used to rivet the insulating piece 180 and the positive pole post to the mounting hole d. For example, as shown in Figure 1 Fig. 2, the two pole posts 120 are arranged in a sheet shape.

[0063] Of course, it can be understood that when the two pole posts 120 and the shell 110 are connected by welding or other modes, the shell 110 can also have a mounting hole to facilitate the two pole posts 120 to be mounted on the shell 110. The mounting hole can be set according to actual conditions, which are not limited herein.

[0064] By setting the shell 110 to include the shell body 111 and the cover body 112, the shell body 111 has the accommodating cavity and the cover body 112 covers the opening k of the shell body 111, which can provide a relatively closed and stable space for the inside of the battery monomer 100. The shell body 111 has the first wall b1 arranged opposite to the opening k along the first direction F1, and the first wall b1 is the largest wall in the shell body 111, and is arranged opposite to the second wall of the cover body 112, which can reduce the space occupied by the battery monomer 100 along the first direction F1 in the electric device (such as a smart phone, a notebook computer, etc.), and is beneficial to the thin design of the battery monomer 100. In addition, the large-area first wall b1 and the second wall b2 are beneficial to the heat dissipation of the battery monomer 100, and improve the performance stability and safety of the battery monomer 100. The two polar columns 120 are located on the first wall b1 and / or the second wall b2, which can make the shell 110 have more space to install the polar column 120, and improve the manufacturability of the battery monomer 100.

[0065] In some embodiments, please continue to refer to Figure 1 and Figure 2 At least one of the first wall b1 and the second wall b2 is provided with a recess a recessed towards the accommodating cavity Q.

[0066] Specifically, the recess a can be recessed on the edge region of the first wall b1, or can be recessed on the edge region of the second wall b2, or can be recessed on the edge region of the first wall b1 and the second wall b2. Of course, recessing can also be performed on other regions of the first wall b1 and / or the second wall b2 (such as the middle region of the first wall b1 and / or the second wall b2, etc.), which is not limited here. The recess depth of the recess a can be set according to the actual situation. For example, the recess a is recessed on the edge region of the first wall b1. Figure 1

[0067] In this way, by providing the recess a on at least one of the first wall b1 and the second wall b2 recessed towards the accommodating cavity Q, additional space can be provided for the arrangement of other components of the electric device, thereby improving the space utilization.

[0068] In some embodiments, please continue to refer to Figure 1 The recess a is provided with at least one, and the bottom walls of all the recesses a constitute a target shell m, and the two polar columns 120 are arranged on the target shell m.

[0069] Among them, the bottom wall of the recess a is the wall arranged along the first direction F1 towards the accommodating cavity Q. For example, the bottom wall of the recess a is the wall arranged along the first direction F1 towards the accommodating cavity Q. Figure 1 ​For example, the illustration shows the case where there is only one recessed portion a. Of course, there can also be multiple recessed portions a, depending on the actual situation of the battery cell 100; no specific restrictions are imposed here. When there is only one recessed portion a, the two terminals 120 can be located on the bottom wall of the recessed portion a. When there are multiple recessed portions a, the two terminals 120 can be located on the same bottom wall of the recessed portion a, or one terminal 120 can be located on the bottom wall of one recessed portion a, and the other terminal 120 can be located on the bottom wall of another recessed portion a. The specific positions of the two terminals 120 can be set according to the actual situation; no specific restrictions are imposed here.

[0070] By providing at least one recess a, with the bottom walls of all recesses a forming a target wall m, and with two terminals 120 disposed on the target wall m, the space formed by the recesses a can be utilized more fully. Compared to placing the two terminals 120 in other locations, components or other components electrically connected to the two terminals 120 can be housed within the space formed by the recesses a, resulting in a more compact and rational layout of the battery cell 100. Furthermore, since the bottom wall of the recess a is oriented in the first direction F1 toward the receiving cavity Q, the space in the thickness direction of the housing 110 can be better utilized, allowing for a more effective increase in the usable space of the battery cell 100 without increasing the overall external dimensions of the housing 110.

[0071] In some embodiments, please refer to Figure 1 Two pole posts 120 are located on the bottom wall of the same recess a.

[0072] By setting two pole posts 120 (one positive pole post and one negative pole post) on the bottom wall of the same recess a, compared with distributing the two pole posts 120 in different positions, the space required due to the different positions of the two pole posts 120 can be reduced, thereby making the layout of the entire battery cell 100 more neat and compact, which is conducive to achieving higher performance of the battery cell 100 in a limited space.

[0073] In some embodiments, please refer to Figure 1 and Figure 2 Define the recessed part a on the same bottom wall where the two pole posts 120 are located as the target part t. The first wall b1 and the second wall b2 are provided with the target part t. One of them is the first target part h1 and the other is the second target part h2.

[0074] For example, with Figure 1 For example, this illustrates the scenario where the first wall b1 is the first target component h1 and the second wall b2 is the second target component h2. Of course, it is also possible for the second wall b2 to be the first target component h1 and the first wall h1 to be the second target component h2. This can be set according to the actual situation, and no specific restrictions are imposed here.

[0075] As shown in Figure 2 The first target piece h1 includes a first portion p1, a second portion p2, and a third portion p3 connecting the first portion p1 and the second portion p2. The first portion p1 and the third portion p3 define a target part t, and the first portion p1 constitutes a bottom wall of the target part t. The third portion p3 connecting the first portion p1 and the second portion p2 can make the first target piece h1 have certain continuity and integrity in structure.

[0076] Along the first direction F1, the distance between the first portion p1 and the second target piece h2 is less than the distance between the second portion p2 and the second target piece h2. Specifically, the distance between the first portion p1 and the second target piece h2 can be 0.85 mm, and the distance between the second portion p2 and the second target piece h2 can be 3.78 mm. In other embodiments, the distance between the first portion p1 and the second target piece h2, the distance between the second portion p2 and the second target piece h2, and the thickness of the shell body 111 can also be other values less than or equal to 4 mm, as long as the distance between the first portion p1 and the second target piece h2 is less than the distance between the second portion p2 and the second target piece h2, which can be set according to actual conditions and is not limited here. In the internal space of the shell 110, some components of the battery monomer 100 with larger volume can be placed in the space defined between the second portion p2 and the second target piece h2, and some components of the battery monomer 100 with smaller volume can be placed in the space defined between the first portion p1 and the second target piece h2, which can improve the utilization of space.

[0077] By setting the target part t and the first target piece h1 and the second target piece h2, the space of the battery monomer 100 can be reasonably arranged. The first target piece h1 includes the first portion p1, the second portion p2, and the third portion p3, and the first portion p1 and the third portion p3 define the target part t, which can achieve more efficient layout in limited space. For example, related components connected to the two pole columns can be more closely arranged in the target part t defined by the first portion p1 and the third portion p3 and the surrounding area, thereby improving the utilization of space. Along the first direction F1, the distance between the first portion p1 and the second target piece h2 is less than the distance between the second portion p2 and the second target piece h2, which can adapt to the space requirements of different components inside the battery monomer 100, reduce unnecessary space waste, and thus can be beneficial to the design of thin batteries.

[0078] In some embodiments, please continue to refer to Figure 1 The target shell m is provided with a liquid injection hole w, and the battery monomer 100 further includes a sealing piece 130 arranged at the liquid injection hole w.

[0079] The injection hole w can communicate the outside and the accommodating cavity Q inside the battery monomer 100, so that the liquid electrolyte can be injected into the accommodating cavity Q. It can be understood that when the electrolyte is in a solid state, the injection hole w can not be provided on the target shell m, the battery monomer 100 can include a sealing member 130 provided at the injection hole w, and the battery monomer 100 can be assembled by filling the solid electrolyte into the shell body 111 when the electrode assembly 140 mentioned below is placed in the shell body 111, and then the cover 112 is covered on the opening of the shell body 111.

[0080] For example, the injection hole w is located on the recessed part a of the first wall b1 which is recessed towards the accommodating cavity Q. Of course, the injection hole w can also be located at other positions, which can be set according to actual conditions, and no specific limitation is made here. Figure 1

[0081] The sealing member 130 can refer to a component for sealing the injection hole w. After the injection is completed, the sealing member 130 is sealed and covered on the opening of the injection hole w, so that the injection hole w is closed, and the risk of leakage of the electrolyte in the battery monomer 100 is reduced. The sealing member 130 can be made of stainless steel, copper, aluminum or the like, and the sealing member 130 can be provided in the form of a stud, a sealing pin or the like, and the sealing member 130 can seal the injection hole w by welding, pressing, bonding or the like. The material, structure and sealing method of the sealing member 130 can be set according to actual conditions, and no specific limitation is made here.

[0082] By providing the injection hole w on the target shell m, the injection of the battery monomer 100 can be realized. At the same time, the battery monomer 100 further includes the sealing member 130 provided at the injection hole w, so that the injection hole w can be closed, the risk of leakage of the liquid electrolyte can be reduced, and the reliability and safety of the battery monomer 100 can be improved.

[0083] Figure 4 The injection hole w is located on the recessed part a of the first wall b1 which is recessed towards the accommodating cavity Q. Of course, the injection hole w can also be located at other positions, which can be set according to actual conditions, and no specific limitation is made here. Figure 1 The exploded structural schematic view of another part of the battery monomer is shown; only the content related to the embodiments of the present application is shown for convenience of description.

[0084] In some embodiments, please continue to refer to Figure 1 , and in combination with Figure 4 , the battery monomer 100 further includes the electrode assembly 140.

[0085] The electrode assembly 140 includes a main body part 141 and two tabs 142 provided at one end of the main body part 141, and the two tabs 142 are electrically connected to the two poles 120 one by one. At least part of the orthogonal projection of the two tabs 142 on the reference surface is located in the orthogonal projection range of the target shell m on the reference surface, and the reference surface is a plane perpendicular to the first direction F1. ​

[0086] Electrode assembly 140 refers to the component in battery cell 100 where the electrochemical reaction occurs. Electrode assembly 140 is housed in receiving cavity Q. It is understood that the shape of housing 110, as mentioned above, can be determined according to the specific shape and size of electrode assembly 140. Electrode assembly 140 may include a positive electrode, a negative electrode, and a separator. For example, the separator is a separator membrane, and the main material of the separator membrane can be at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator can prevent short circuits between the positive and negative electrodes while allowing the active material to pass through. Electrode assembly 140 can be a wound structure formed by winding the positive electrode, negative electrode, and separator; or it can be a stacked structure formed by arranging the positive electrode, negative electrode, and separator in layers. It can be set according to the actual situation and is not specifically limited here. It is understood that regardless of whether electrode assembly 140 is a wound structure or a stacked structure, the main body 141 can be flat.

[0087] When assembling the battery cell 100, the electrode assembly 140 can be placed into the casing 111 first, and liquid or solid electrolyte can be filled into the casing 111. Then, the cover 112 can be placed over the opening of the casing 111 to complete the assembly of the battery cell 100. Alternatively, when assembling the battery cell 100, the electrode assembly 140 can be placed into the casing 111 first, and then the cover 112 can be placed over the opening of the casing 111. Liquid electrolyte can then be filled into the casing 110 through the injection hole w, and then the injection hole w can be sealed with the sealant 130 to complete the assembly of the battery cell 100.

[0088] The main body 141 may be the portion of the electrode assembly 140 corresponding to the area of ​​the electrode plate coated with the active material layer. The two tabs 142 may be one positive tab and the other negative tab. The positive tab may be the portion of the positive electrode plate that is not coated with the positive active material layer, and the negative tab may be the portion of the negative electrode plate that is not coated with the negative active material layer.

[0089] For example, with Figure 4 For example, the illustration shows the case where the two tabs 142 are located on one side of the main body 141. Of course, the two tabs 142 can also be located on opposite sides of the main body 141, and can be set according to the actual situation, without specific restrictions here. It should be noted that the two tabs 142 can be arranged in a roughly sheet-like shape.

[0090] The two tabs 142 are electrically connected to the two poles 120 in a one-to-one correspondence to output the electric energy of the battery monomer 100, ensuring that the current can flow more smoothly between the electrode assembly 140 and the external circuit. It can be understood that the positive tab is electrically connected to the positive pole, and the negative tab is electrically connected to the negative pole. After the electrode assembly 140 is accommodated in the space formed by the shell 110, the tabs 142 of the electrode assembly 140 can be electrically connected to the corresponding position and the corresponding pole 120.

[0091] The "at least part of the orthographic projection of the two tabs 142 on the reference surface is located in the orthographic projection range of the target shell m on the reference surface" means that part of the orthographic projection of the two tabs 142 on the reference surface can be located in the orthographic projection range of the target shell m on the reference surface, or all of the orthographic projection of the two tabs 142 on the reference surface can be located in the orthographic projection range of the target shell m on the reference surface. By locating at least part of the orthographic projection of the two tabs 142 on the reference surface in the orthographic projection range of the target shell m on the reference surface, the two tabs 142 can be electrically connected to the two poles 120 in a one-to-one correspondence on the target shell m, and the space of the battery monomer 100 can be more reasonably utilized. The reference surface is a plane perpendicular to the first direction F1.

[0092] By electrically connecting the two tabs 142 to the two poles 120 in a one-to-one correspondence, the performance stability and safety of the battery monomer 100 can be improved. In addition, by locating at least part of the orthographic projection of the two tabs 142 on the reference surface in the orthographic projection range of the target shell m on the reference surface, a more compact layout can be achieved in the limited space of the battery monomer 100, which helps to improve the space utilization of the battery monomer 100 and reduce the installation space occupied by the battery monomer 100, thereby facilitating the thin design of the battery monomer 100.

[0093] In some embodiments, please continue to refer to Figure 1 , the wall provided with the recess a in the first wall b1 and the second wall b2 is defined as the target wall, and the component of the shell body 111 and the cover 112 having the target wall is defined as the target component. The target component is a one-piece component.

[0094] It can be understood that the wall provided with the recess a is defined as the target wall, and the component of the shell body 111 and the cover 112 containing the target wall is the target component. For example, if the recess a is on the first wall b1 of the shell body 111, the shell body 111 is the target component; if the recess a is on the second wall b2 of the cover 112, the cover 112 is the target component. For example, Figure 1 , the case where the recess a is on the first wall b1 of the shell body 111 and the shell body 111 is the target component is shown.

[0095] When the shell body 111 is the target component, the target component can be a one-piece component. Specifically, the shell body 111 can be integrally formed by a sheet metal part through a stamping process, which can reduce manufacturing costs and improve production efficiency as a kind of efficient production process; the shell body 111 can also be integrally formed by a sheet metal part through a bending process. Of course, the shell body 111 can also be formed by a combination, for example, the shell body 111 can include a bottom wall and a plurality of side walls, which can be combined into the shell body 111 by welding, pressing, or the like. When the cover 112 is the target component, the target component can be a one-piece component. Specifically, similar to the case mentioned above when the shell body 111 is the target component, details are not repeated here.

[0096] By setting the target component as a one-piece component, compared with a spliced structure, the one-piece component can make the overall structural strength of the shell body 111 or the cover 112 higher and the sealing better, so as to effectively protect the components inside the battery monomer 100.

[0097] Figure 5 An exploded structural schematic diagram of a part of a battery monomer provided by another embodiment of the application is shown; Figure 6 An exploded structural schematic diagram of a part of a battery monomer provided by another embodiment of the application is shown; Figure 7 An exploded structural schematic diagram of a part of a battery monomer provided by another embodiment of the application is shown; for convenience of description, only the content related to the embodiments of the application is shown.

[0098] In some embodiments, please continue to refer to Figure 1 , and refer to Figure 5 and Figure 7 The target wall has a first side c1 and a second side c2 oppositely arranged along a second direction F2, and a third side c3 and a fourth side c4 oppositely arranged along a third direction F3. The target wall is the wall with the recess a in the first wall b1 and the second wall b2. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. Of course, the first direction F1, the second direction F2 and the third direction F3 can also intersect with each other.

[0099] The target component includes a third wall surrounding the target side of the target wall, and the target side is at least one of the first side c1, the second side c2, the third side c3 and the fourth side c4. Specifically, when the target component is the shell body 111, as shown in Figure 5 , the target component can include a third wall surrounding the first side c1, the second side c2, the third side c3 and the fourth side c4 of the first wall b1; as Figure 6As shown, the target component can also include a third wall surrounding the first wall b1 and the third side c3 and the fourth side c4, and the first side c1 and the second side c2 are integrally formed with the shell body 111; as shown in FIG. 1B, the first side c1 and the second side c2 of the third wall are bent. The first side c1 and the second side c2 of the third wall can be set according to actual conditions, and are not specifically limited here. When the target component is the cover body 112, it is similar to the case mentioned above when the target component is the shell body 111, and is not repeated here. Figure 7 As shown, the target component can also include a third wall surrounding the first wall b1 and the third side c3 and the fourth side c4, and the first side c1 and the second side c2 are integrally formed with the shell body 111; as shown in FIG. 1B, the first side c1 and the second side c2 of the third wall are bent. The first side c1 and the second side c2 of the third wall can be set according to actual conditions, and are not specifically limited here. When the target component is the cover body 112, it is similar to the case mentioned above when the target component is the shell body 111, and is not repeated here.

[0100] By setting the target component to include a third wall surrounding the target side of the target wall, the target side being at least one of the first side c1, the second side c2, the third side c3, and the fourth side c4, the target component can be more flexibly set to meet the diversified space requirements of the battery monomer 100.

[0101] In some embodiments, please continue to refer to Figure 1 and Figure 2 The shell body 111 and the cover body 112 are connected by a predetermined manner. The predetermined manner includes at least one of metal welding, injection molding, mechanical connection, diffusion metal connection, adhesive connection, and laser sintering.

[0102] Metal welding can be welding, which uses high temperature to melt and fuse the connection of metal components together to form a whole structure. Injection molding refers to injecting plastic material at the connection part of the shell body 111 and the cover body 112 during the manufacturing process, and the plastic material is solidified to connect the shell body 111 and the cover body 112. Mechanical connection includes using screws, buckles and other mechanical structures to fix the shell body 111 and the cover body 112 together. Diffusion metal connection is a special connection method, under certain conditions, metal atoms diffuse into each other at the connection interface, thereby achieving connection. Adhesive connection is to use adhesive to bond the shell body 111 and the cover body 112. Laser sintering is to use laser energy to sinter the powder material at the connection part of the shell body 111 and the cover body 112 to form a solid, thereby connecting the shell body 111 and the cover body 112 together. Of course, in addition to the above-mentioned connection methods, other connection methods can also be used, and are not specifically limited here.

[0103] The shell body 111 and the cover body 112 are connected in a preset manner, which can help improve the sealing of the battery monomer 100. The preset connection manner can effectively seal the gap between the shell body 111 and the cover body 112, and improve the stability of the internal environment of the battery monomer 100. At the same time, the mechanical connection, metal welding and diffusion metal connection can enhance the overall structural stability of the battery monomer 100. The battery monomer 100 may be subjected to various external forces, vibrations or extrusions during use. Through these connection methods, the shell body 111 and the cover body 112 can be more firmly connected together, reducing the possibility of deformation of the overall structure of the battery monomer 100.

[0104] In some embodiments, please continue to refer to Figure 1 and Figure 2 The thickness of the shell 110 along the first direction F1 is less than or equal to 4mm, and the cover body 112 is configured as a plate, and the thickness of the cover body 112 is 0.005mm to 0.2mm.

[0105] For example, the thickness of the shell 110 along the first direction F1 can be 1mm, 2mm, 3mm, 3.9mm or 4mm, and the thickness of the cover body 112 can be 0.005mm, 0.1mm, 0.15mm or 0.2mm.

[0106] Of course, the thickness of the shell 110 can also be other values less than 4mm, and the thickness of the cover body 112 can also be other values in the range of 0.005mm to 0.2mm.

[0107] The cover body 112 is configured as a plate, and the plate structure is simpler and more conducive to processing and forming during production. The thickness of the cover body 112 is 0.005mm to 0.2mm, which can cover the shell body 111 while reducing the volume occupied by the cover body 112.

[0108] By setting the thickness of the shell 110 along the first direction F1 to be less than or equal to 4mm, and configuring the cover body 112 as a plate with a thickness of 0.005mm to 0.2mm, the battery monomer 100 can be more compact in size, which is conducive to the thin design of the battery monomer 100. At the same time, the thinner shell body 111 and cover body 112 can also reduce the amount of material required, thereby reducing the weight of the battery monomer 100, which is conducive to improving the thinness of the battery monomer 100.

[0109] In some embodiments, please continue to refer to Figure 1 and Figure 4 The battery monomer 100 further comprises a pressure relief mechanism 150, and the pressure relief mechanism 150 is arranged on the first wall b1 or the second wall b2.

[0110] The pressure relief mechanism 150 refers to an element or component that is actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 100 reaches a predetermined threshold. The specific threshold can vary depending on the design requirements of the battery cell 100. When the internal pressure or temperature of the battery cell 100 reaches the predetermined threshold, the pressure relief mechanism 150 performs an action or a weak structure provided in the pressure relief mechanism 150 is broken, thereby forming an opening or a passage for the internal pressure or temperature to be released.

[0111] Specifically, the pressure relief mechanism 150 can be an anti-explosion pattern provided on the first wall b1 or the second wall b2. The anti-explosion pattern is a groove formed by metal etching or stamping on the first wall b1 or the second wall b2. The shape of the anti-explosion pattern includes but is not limited to C-shaped, S-shaped, V-shaped, X-shaped, and O-shaped. The depth of the anti-explosion pattern can be adjusted according to the capacity of the battery cell 100, which is not limited. Due to the thinning of the thickness at the anti-explosion pattern, the strength is reduced. When the battery cell 100 experiences thermal runaway, the internal pressure increases, a large amount of gas is generated, the internal pressure increases dramatically, and the internal pressure exceeds the safe pressure. The anti-explosion pattern is preferentially broken to form a pressure relief passage to discharge the internal gas. For example, as shown in FIG. 2, the pressure relief mechanism 150 is provided with an anti-explosion pattern on the first wall b1. Figure 4

[0112] The pressure relief mechanism 150 can also be provided with an anti-explosion sheet and a heat-sensitive release adhesive on the first wall b1 or the second wall b2. The heat-sensitive release adhesive includes but is not limited to EVA (ethylene-vinyl acetate copolymer) hot melt adhesive, polyamide hot melt adhesive, polyester hot melt adhesive, PP (polypropylene) adhesive, etc. When the battery cell 100 experiences thermal runaway, the internal pressure increases, a large amount of gas is generated, the internal pressure increases dramatically, and the internal pressure exceeds the safe pressure. The heat-sensitive release adhesive releases pressure in advance to form a pressure relief passage to discharge the internal gas.

[0113] The pressure relief mechanism 150 can also be provided with an anti-explosion film on the first wall b1 or the second wall b2. When the battery cell 100 experiences thermal runaway, the internal pressure increases, a large amount of gas is generated, the internal pressure increases dramatically, and the internal pressure exceeds the safe pressure. The anti-explosion film cracks to release pressure.

[0114] By providing the pressure relief mechanism 150 on the first wall b1 or the second wall b2, the risk of further thermal runaway of the battery cell 100 can be reduced, and the safety and reliability of the battery cell 100 are improved.

[0115] In some embodiments, please continue to refer to Figure 1 and Figure 4 At least one of the first wall b1 and the second wall b2 is provided with at least one of a heat-conducting layer and an electromagnetic shielding layer on the side surface facing away from the accommodation cavity Q.

[0116] ​The main function of the heat-conducting layer is to conduct heat, which can quickly transfer the heat of at least one of the first wall b1 and the second wall b2 away from the side surface of the containing cavity Q. The electromagnetic shielding layer is mainly used to shield external electromagnetic interference or reduce the outward radiation of electromagnetic signals generated inside the battery monomer 100, which plays a role in electromagnetic protection.

[0117] Specifically, the following cases can occur: case one, at least one of the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q, that is, the heat-conducting layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q, or the electromagnetic shielding layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q, or both the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q; case two, at least one of the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q, that is, the heat-conducting layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q, or the electromagnetic shielding layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q, or both the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q; case three, at least one of the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of both the first wall b1 and the second wall b2 away from the containing cavity Q, that is, the heat-conducting layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q, the electromagnetic shielding layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q, or both the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q, both the heat-conducting layer and the electromagnetic shielding layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q, or the electromagnetic shielding layer can be arranged on the side surface of the first wall b1 away from the containing cavity Q, and the heat-conducting layer can be arranged on the side surface of the second wall b2 away from the containing cavity Q. The actual situation can be set, and no specific limitation is made here.

[0118] The side surface of at least one of the first wall b1 and the second wall b2 away from the containing cavity Q can be oxidized to form a heat-conducting layer. Graphene, aluminum oxide, boron nitride, high-thermal-conductivity metal, ceramic material, etc. can be sprayed on the side surface of at least one of the first wall b1 and the second wall b2 away from the containing cavity Q to form a heat-conducting layer. The side surface of at least one of the first wall b1 and the second wall b2 away from the containing cavity Q can be inlaid with a heat sink or a metal foil to form a heat-conducting layer. Nano materials can be sprayed on the side surface of at least one of the first wall b1 and the second wall b2 away from the containing cavity Q to form a heat-conducting layer. A phase change material (PCM) can be arranged on the side surface of at least one of the first wall b1 and the second wall b2 away from the containing cavity Q to form a heat-conducting layer.

[0119] The side surface of at least one of the first wall b1 and the second wall b2 facing away from the accommodation cavity Q can be provided with a nickel alloy, an iron-based alloy, a conductive fabric, graphene, a wave-absorbing material, a synthetic composite material, etc. to form an electromagnetic shielding layer, thereby reducing electromagnetic interference.

[0120] By providing a heat-conducting layer on the side surface of at least one of the first wall b1 and the second wall b2 facing away from the accommodation cavity Q, the heat generated by the battery monomer 100 can be effectively transmitted to the external environment, improving the heat dissipation efficiency and reducing the risk of excessively high internal temperature of the battery monomer. By providing an electromagnetic shielding layer on the side surface of at least one of the first wall b1 and the second wall b2 facing away from the accommodation cavity Q, the outwardly radiated electromagnetic signals generated inside the battery monomer 100 can be reduced, thereby improving the electromagnetic compatibility (EMC) of the battery monomer 100.

[0121] Figure 8 A perspective structural schematic diagram of a battery provided by some embodiments of the present application is shown. For ease of illustration, only the content related to the embodiments of the present application is shown.

[0122] In the embodiments of the present application, a battery is provided. Please refer to Figures 1-4 , and refer to Figure 8 , which includes the battery monomer 100 provided by any one of the above embodiments.

[0123] The battery 200 can further include a protection circuit module 210 (PCM) and a flexible printed circuit 220 (FPC).

[0124] The protection circuit module 210 (PCM) is a component that protects the battery from overcharging, overdischarging, and short circuiting, etc. The flexible printed circuit 220 (FPC) is a highly reliable, excellent flexible printed circuit board made of polyimide or polyester film as a base material, with the characteristics of high wiring density, light weight, thin thickness, and good bending property. Specifically, the protection circuit module 210 and the flexible printed circuit 220 are electrically connected and can be located on the recessed portion a of at least one of the first wall b1 and the second wall b2 facing the accommodation cavity Q. In this way, the space of the recessed portion a can be more reasonably utilized, reducing the occupation of other spaces of the electrical device by the battery and improving the utilization rate of the space.

[0125] The embodiments of the present application provide a power consumption device, comprising the battery provided by any one of the embodiments, and the battery is used for providing electric energy for the power consumption device. The power consumption device can be an electronic device such as a smart phone, a smart watch and a notebook computer, and can also be other power consumption devices. Some components of the battery can be located on the recess a of the battery monomer 100, so that more space can be provided for other components (such as a processor, a camera module, a wireless charging coil and the like) in the electronic device, which is beneficial to the thinness and convenience of the electronic device.

[0126] Next, the manufacturing process of the battery monomer provided by the embodiments of the present application is exemplarily described, but is not limited thereto.

[0127] Exemplarily, in combination with the description of the battery monomer 100, Figure 1 , Figure 3 and Figure 7The maximum thickness of the shell 110 of the battery monomer 100 along the first direction F1 is 4 mm, the length along the second direction is 65 mm, and the width along the third direction F3 is 45 mm. The distance between the first part p1 of the shell body 111 and the cover 112 is 0.85 mm, and the distance between the second part p2 of the shell body 111 and the cover 112 is 3.78 mm. The materials of the shell body 111 and the cover 112 are both stainless steel. The shell body 111 is a one-time stamping molded part. The positive pole is installed at the recess a of the first wall b1 of the shell body 111, and the positive pole is installed at the recess by mechanical riveting. The electrode assembly 140 is formed by stacking the positive plate, the negative plate and the separator. The two tabs 142 of the electrode assembly 140 are welded to the positive and negative poles respectively. According to the corresponding process flow, the electrode assembly 140 is baked, then the electrode assembly 140 is placed in the accommodating cavity Q of the shell body 111, and then the cover 112 is closed and sealed by laser welding. Then the anti-explosion pattern with a depth of 0.045 mm is laser etched on the second wall b2 of the cover 112, and the outer surface of the cover 112 is sprayed with graphene nano coating, so as to facilitate rapid heat dissipation. Then the liquid electrolyte is injected into the battery monomer 100 through the injection hole w, and the injection hole w is sealed by welding the sealing nail. After the formation and testing of the battery monomer 100 are completed, the battery monomer 100 can be assembled. The protection circuit module (PCM) and the flexible printed circuit (FPC) are installed at the recess a of the battery monomer 100 in sequence, and finally the insulating packaging material such as Dupont paper, mylar tape, double-sided tape, polyimide film (PI) film and the like is attached to the outer surface of the battery monomer 100. Thus, the corresponding battery 200 is formed, and the battery 200 is installed in the corresponding area of the electric device.

[0128] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0129] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery cell, characterized by, The battery cell comprises: a housing comprising a housing body and a cover body, the housing body having a receiving cavity and an opening communicating with the receiving cavity, and the cover body covering the opening; the housing body has a first wall opposite to the opening in a first direction, the first wall being the largest wall in the housing body, and the cover body has a second wall opposite to the first wall; two pole columns are arranged on the first wall and / or the second wall; wherein the first direction is the thickness direction of the housing. At least one of the first wall and the second wall is provided with a recessed portion recessed towards the receiving cavity.

2. The battery cell of claim 1, wherein, The recessed portion is provided with at least one, and the bottom wall of all the recessed portions constitutes a target wall, and two pole columns are arranged on the target wall; 3. The battery cell of claim 2, wherein, The bottom wall of the recessed portion is a wall arranged towards the receiving cavity in the first direction. The two pole columns are arranged on the bottom wall of the same recessed portion.

4. The battery cell of claim 3, wherein, The recessed portion in which the two pole columns are arranged is defined as a target portion, one of the first wall and the second wall in which the target portion is arranged is defined as a first target member, and the other is defined as a second target member; 5. The battery cell of claim 4, wherein, The first target member comprises a first part, a second part, and a third part connecting the first part and the second part; In the first direction, the distance between the first part and the second target member is smaller than the distance between the second part and the second target member; The first part and the third part define the target portion, and the first part constitutes the bottom wall of the target portion. The target wall is provided with a liquid injection hole, and the battery cell further comprises a sealing member arranged on the liquid injection hole; and / or 6. The battery cell of claim 3, wherein, The battery cell further comprises an electrode assembly, the electrode assembly comprises a main body portion and two pole tabs arranged at one end of the main body portion, and the two pole tabs are electrically connected to the two pole columns one by one; at least part of the projection of the two pole tabs on a reference plane is located within the projection range of the target wall on the reference plane; the reference plane is a plane perpendicular to the first direction. The wall in which the recessed portion is arranged in the first wall and the second wall is defined as a target wall, and the part in which the target wall is arranged in the housing body and the cover body is defined as a target part; 7. The battery cell of claim 2, wherein, The target part is an integrally formed part. The target wall has a first side and a second side opposite to each other in a second direction, and a third side and a fourth side opposite to each other in a third direction; 8. The battery cell of claim 7, wherein, The target part comprises a third wall surrounding the target side of the target wall, and the target side is at least one of the first side, the second side, the third side and the fourth side; The first direction, the second direction and the third direction are perpendicular to each other. The housing body and the cover body are connected by a predetermined mode; the predetermined mode comprises at least one of metal welding, injection molding, mechanical connection, diffusion metal connection, adhesive connection, and laser sintering; and / or 9. The battery cell of any one of claims 1-8, wherein, The thickness of the housing in the first direction is less than or equal to 4 mm, the cover body is configured as a plate, and the thickness of the cover body is 0.005 mm to 0.2 mm; and / or ​ The battery cell further comprises a pressure relief mechanism disposed on the first wall or the second wall; and / or At least one of the first wall and the second wall has a side surface facing away from the accommodating cavity, which is provided with at least one of a heat-conducting layer and an electromagnetic shielding layer.

10. A battery, characterized by A battery cell according to any one of claims 1-9.

11. An electrical device, characterized by A battery according to claim 10, wherein the battery is configured to provide electrical energy to the electrical device.

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