Battery and electronic equipment

Abstract

The utility model discloses a battery and an electronic device, the battery comprises: a housing having a storage cavity, the cavity wall of the storage cavity comprising a first wall; the battery cell is arranged in the storage cavity, and the battery cell comprises a first tab and a second tab; the first connecting piece is connected to the first wall in an insulating manner, and the first connecting piece is electrically connected with the first tab; and the second connecting piece is connected to the first wall, and the second tab is electrically connected with the second connecting piece. The battery provided by the utility model can have relatively high safety.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and electronic equipment. Background Art

[0002] In the related art, the battery includes a shell and a battery cell, wherein the shell can be made of metal. The battery cell is placed inside the shell, and a positive electrode column is provided on the shell. The positive electrode ear of the battery cell is welded to the positive electrode column, and the negative electrode ear of the battery cell is electrically connected to the shell, so that the shell is negatively charged. Furthermore, after the positive electrode column is provided on the shell, the size of the positive electrode ear from the shell (since the positive electrode column is connected to the shell, the size of the positive electrode ear from the shell is the size of the positive electrode ear from the positive electrode column) is smaller than the size of the negative electrode ear from the shell. That is, the gap between the negative electrode ear and the shell is larger than the gap between the positive electrode ear and the shell, which will cause uneven force on the positive electrode ear and the negative electrode ear when the battery is impacted, thereby causing safety risks such as short circuit and fire in the battery. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a battery with high safety.

[0004] The utility model also provides an electronic device.

[0005] A battery according to an embodiment of the first aspect of the present invention includes:

[0006] The housing has a storage cavity, wherein a cavity wall of the storage cavity includes a first wall;

[0007] A battery cell is disposed in the storage cavity, the battery cell comprising a first tab and a second tab;

[0008] a first connecting member, insulated and connected to the first wall, and the first connecting member is electrically connected to the first tab;

[0009] The second connecting member is connected to the first wall, and the second electrode tab is electrically connected to the second connecting member.

[0010] The battery according to the embodiment of the present invention has at least the following beneficial effects: the battery cell is placed in the storage cavity, and the first connector and the second connector are both connected to the first wall, wherein the first connector and the first pole tab are electrically connected, and the second connector and the second pole tab are electrically connected. In the prior art, the second connector is not provided in the battery, which will cause a large difference between the distance between the first pole tab and the shell and the distance between the second pole tab and the shell, and the first pole tab is unevenly stressed, resulting in safety problems. In the present application, after the first connector and the second connector are provided, the difference between the distance between the first pole tab and the shell and the distance between the second pole tab and the shell is small. When the battery is impacted, the first pole tab and the second pole tab are evenly stressed, thereby effectively avoiding the situation where one of the first pole tab and the second pole tab is unevenly stressed and short-circuited. Specifically, the battery can have higher safety.

[0011] According to some embodiments of the present invention, the battery further includes a third connecting member electrically connected to a side of the housing facing away from the first wall.

[0012] According to some embodiments of the battery of the present invention, the third connecting member is welded to the shell, and along the thickness direction of the first wall, the projection of the third connecting member falls within the projection range of the second connecting member.

[0013] According to some embodiments of the present invention, the battery further includes a first conductive adhesive layer, and two sides of the first conductive adhesive layer are respectively adhered to the third connecting member and the housing.

[0014] According to some embodiments of the present invention, the battery further includes a second conductive adhesive layer, and two sides of the second conductive adhesive layer are respectively adhered to the second connecting member and the first wall.

[0015] According to some embodiments of the battery of the present invention, the second connector and the shell are an integrated structure.

[0016] According to some embodiments of the battery of the present invention, the thickness of the second connecting member is L, and 0.1 mm ≤ L ≤ 0.7 mm.

[0017] According to some embodiments of the battery of the present invention, the first connecting member includes a main body and two protrusions, the two protrusions are respectively connected to the two ends of the main body, and the protrusions protrude radially relative to the main body; the protrusions are insulated and connected to the first wall, and the thickness of the protrusions is not less than the thickness of the second connecting member.

[0018] In the battery according to some embodiments of the present invention, the second connecting member is welded to the shell.

[0019] The electronic device according to the second embodiment of the present invention includes the battery described in any one of the first embodiment.

[0020] The electronic device according to the embodiment of the present utility model has at least the following beneficial effects: the battery cell is placed in the storage cavity, the first connector and the second connector are both connected to the first wall, wherein the first connector is electrically connected to the first pole ear, and the second connector is electrically connected to the second pole ear. In the prior art, the second connector is not provided in the battery, which will cause the distance between the first pole ear and the shell to be significantly different from the distance between the second pole ear and the shell, and the first pole ear is unevenly stressed, resulting in safety problems. In the present application, after the first connector and the second connector are provided, the difference between the distance between the first pole ear and the shell and the distance between the second pole ear and the shell is smaller. When the battery is impacted, the first pole ear and the second pole ear are evenly stressed, thereby effectively avoiding the situation where one of the first pole ear and the second pole ear is unevenly stressed and short-circuited. Specifically, the battery can have higher safety. Furthermore, the safety of the electronic device with the battery is also better.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 A schematic diagram of a battery according to a first embodiment of the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0025] Figure 3 Schematic diagram of a battery housing, a first connector, and a second connector in some embodiments of the present utility model;

[0026] Figure 4 is a schematic diagram of a battery according to a second embodiment of the present invention;

[0027] Figure 5 A partial schematic diagram of a battery according to a first embodiment of the present invention;

[0028] Figure 6 A partial schematic diagram of a battery according to a second embodiment of the present invention;

[0029] Figure 7 is a partial schematic diagram of a battery according to a third embodiment of the present invention;

[0030] Figure 8Schematic partial cross-sectional view of batteries according to some embodiments of the present invention.

[0031] Reference numerals:

[0032] Battery 10, housing 100, storage cavity 110, first wall 120, second wall 130, third wall 140, fourth wall 150, fifth wall 160, battery cell 200, first electrode tab 210, second electrode tab 220, first connector 300, body 310, protrusion 320, second connector 400, third connector 500, first conductive adhesive layer 600, second conductive adhesive layer 700, insulating member 800. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0038] In the related art, the battery 10 includes a shell 100 and a battery cell 200, wherein the shell 100 can be made of metal. The battery cell 200 is placed inside the shell 100, and a positive electrode column is provided on the shell 100. The positive electrode ear of the battery cell 200 is welded to the positive electrode column, and the negative electrode ear of the battery cell 200 is electrically connected to the shell 100, so that the shell 100 is negatively charged. Furthermore, after the positive electrode column is provided on the shell 100, the size of the positive electrode ear from the shell 100 (since the positive electrode column is connected to the shell 100, the size of the positive electrode ear from the shell 100 is the size of the positive electrode ear from the positive electrode column) is smaller than the size of the negative electrode ear from the shell 100. That is, the gap between the negative electrode ear and the shell 100 is larger than the gap between the positive electrode ear and the shell 100, which will cause the positive electrode ear and the negative electrode ear to be unevenly stressed when the battery 10 is impacted, thereby causing the battery 10 to have safety risks such as short circuit and fire. To this end, the present application proposes a battery 10.

[0039] Please refer to Figures 1 to 8 In some embodiments, the battery 10 includes: a shell 100, a battery cell 200, a first connector 300 and a second connector 400. The shell 100 has a storage cavity 110, and the cavity wall of the storage cavity 110 includes a first wall 120. The material of the shell 100 is a conductive material, such as a metal material. The shape of the shell 100 can be square or irregular, such as rectangular, square, L-shaped or polygonal. Correspondingly, the shape of the storage cavity 110 can also be square or irregular. Please refer to Figure 3The walls of the storage chamber 110 include a first wall 120, a second wall 130, a third wall 140, a fourth wall 150, and a fifth wall 160. The first wall 120 and the second wall 130 are disposed opposite each other, and the third wall 140 and the fourth wall 150 are disposed opposite each other. The first wall 120, the second wall 130, the third wall 140, and the fourth wall 150 surround the edge connected to the fifth wall 160. The opening of the storage chamber 110 can be sealed by welding the cover plate to the housing 100. The battery cell 200 is disposed in the storage chamber 110 and includes a first tab 210 and a second tab 220. The battery cell 200 is formed by winding or stacking a positive electrode sheet and a negative electrode sheet. The first tab 210 can be electrically connected to the positive electrode sheet, or the first tab 210 can be electrically connected to the negative electrode tab. The second tab 220 can be electrically connected to the positive electrode sheet, or the second tab 220 can be electrically connected to the negative electrode tab. The first connector 300 is insulated and connected to the first wall 120, and the second connector 400 is connected to the first wall 120. The first connector 300 is also electrically connected to the first tab 210. Specifically, after the first connector 300 and the first tab 210 are electrically connected, the first connector 300 is negatively or positively charged, and the second tab 220 and the second connector 400 are electrically connected, and the second connector 400 is positively or negatively charged. For example, if the second connector 400 is connected to the housing 100, this may cause the housing 100 to be negatively charged. In this case, to prevent the battery 10 from short-circuiting, the first connector 300 needs to be insulated and connected to the first wall 120. Furthermore, the battery cell 200 is placed in the storage cavity 110, and the first connector 300 and the second connector 400 are both connected to the first wall 120, wherein the first connector 300 and the first pole tab 210 are electrically connected, and the second connector 400 and the second pole tab 220 are electrically connected. In the prior art, the second connector 400 is not provided in the battery 10, which will cause a large difference between the distance between the first pole tab 210 and the shell 100 and the distance between the second pole tab 220 and the shell 100, and the first pole tab 210 is subjected to uneven force, resulting in safety problems. In the present application, after the first connector 300 and the second connector 400 are provided, the difference between the distance between the first pole tab 210 and the shell 100 and the distance between the second pole tab 220 and the shell 100 is small. When the battery 10 is impacted, the first pole tab 210 and the second pole tab 220 are subjected to uniform force, thereby effectively avoiding the situation where one of the first pole tab 210 and the second pole tab 220 is subjected to uneven force and short-circuited. For example, in the prior art, the distance between the shell 100 (which can also be considered as the first connector 300) and the first tab 210 can be 1 mm, and the distance between the shell 100 and the second tab 220 can be 1.5 mm. Therefore, when the battery 10 is impacted by external force, the first tab 210 is closer to the shell 100, and the first tab 210 will be subjected to more force.In the present application, after the first connector 300 and the second connector 400 are provided, the distance between the housing 100 (first connector 300) and the first tab 210 can be 1 mm, and the distance between the housing 100 (second connector 400) and the second tab 220 can be 1 mm, thereby ensuring that the first tab 210 and the second tab 220 are subjected to uniform force. Specifically, the battery 10 can have higher safety.

[0040] Furthermore, the above describes a case where the battery 10 includes a first connector 300 and a second connector 400, wherein after the first connector 300 is insulated and connected to the shell 100, the first connector 300 can pass through the shell 100, thereby achieving conduction between the first pole ear 210 and the outside world. The first connector 300 can be a metal sheet, or other conductive member. After the second pole ear 220 is connected to the second connector 400, this can make the shell 100 charged. The second connector 400 can be a metal sheet, or other conductive member. In order to facilitate conduction between the shell 100 and the outside world, it can be connected to the shell 100 through the third connector 500, thereby facilitating connection and identification. For details, please refer to Figure 4 and Figure 8 In some embodiments, the battery 10 further includes a third connector 500, which can be a metal sheet, such as a nickel sheet, or other conductive member. The third connector 500 is electrically connected to the side of the housing 100 facing away from the first wall 120. Specifically, the third connector 500 can be welded to the side of the housing 100 facing away from the first wall 120, or connected to the side of the housing 100 facing away from the first wall 120 via conductive adhesive. The third connector 500 can be a metal sheet or other conductive member. Electrically connecting the third connector 500 to the side of the housing 100 facing away from the first wall 120 facilitates electrical connection between the second terminal tab 220 and the outside world. Furthermore, the third connector 500 and the first connector 300 can be spaced apart across the width of the housing 100 to form the positive and negative poles of the battery 10, facilitating electrical connection between the battery 10 and an electrical device.

[0041] Furthermore, the third connector 500 can be welded to the side of the shell 100 facing away from the first wall 120. Welding has many advantages, such as improved connection stability and strength, excellent sealing performance, a wide range of connections, simple and cost-effective processing, easy to realize automated production, and improved physical properties of materials. After the third connector 500 is welded to the shell 100, the connection between the third connector 500 and the shell 100 is relatively stable, which can extend the service life of the battery 10. Among them, the thickness of the shell 100 is generally between 0.05mm and 0.1mm, and the material of the shell 100 is generally stainless steel. Since the thickness of the shell 100 is too thin, when the third connector 500 is welded to the shell 100, it is easy to weld through the shell 100, resulting in poor appearance and leakage of the battery 10, affecting the service life of the battery 10, and affecting the electrical performance of the battery 10. To this end, the second connector 400 and the third connector 500 can be positioned relative to each other, thereby effectively avoiding the above-mentioned problems. For details, please refer to Figure 8 In some embodiments, the third connector 500 is welded to the housing 100, and along the thickness direction of the first wall 120, the projection of the third connector 500 falls within the projection range of the second connector 400. The provision of the second connector 400 can indirectly increase the thickness of the housing 100, thereby effectively ensuring that the housing 100 will not be penetrated when the third connector 500 is welded to the housing 100. Accordingly, when the second connector 400 and the second tab 220 are welded, the third connector 500 can also indirectly increase the thickness of the housing 100, thereby improving the welding effect.

[0042] Furthermore, the above mentioned method of welding the third connecting member 500 to the housing 100, the third connecting member 500 can also be electrically connected to the housing 100 in other ways. For details, please refer to Figure 6 In some embodiments, the battery 10 further includes a first conductive adhesive layer 600, and the two sides of the first conductive adhesive layer 600 are respectively bonded to the third connector 500 and the shell 100. The first conductive adhesive layer 600 can be a conductive adhesive or a conductive tape. The conductive adhesive is mainly composed of a resin matrix, conductive particles, and dispersing additives, auxiliary agents, etc. Among them, the resin matrix provides the basic bonding performance and mechanical strength for the adhesive, while the conductive particles are the key to achieving the conductive function. There are various types of conductive particles, including silver, gold, copper, carbon, etc., among which silver-based conductive adhesives are the most widely used. The principle of conductive adhesive is that the conductive particles contact each other to form a conductive path, or form a certain current path between the particles through the tunnel effect. Specifically, by setting the first conductive adhesive layer 600, the battery 10 can be easily processed and manufactured.

[0043] Furthermore, when the second connecting member 400 is connected to the first wall 120, it can also be completed through the second conductive adhesive layer 700. Figure 7 In some embodiments, the battery 10 further includes a second conductive adhesive layer 700, and the two sides of the second conductive adhesive layer 700 are respectively bonded to the second connector 400 and the first wall 120. The second conductive adhesive layer 700 can be a conductive adhesive or a conductive tape. The conductive adhesive is mainly composed of a resin matrix, conductive particles, and dispersing additives, auxiliary agents, etc. Among them, the resin matrix provides the adhesive with basic bonding properties and mechanical strength, while the conductive particles are the key to achieving the conductive function. There are various types of conductive particles, including silver, gold, copper, carbon, etc., among which silver-based conductive adhesives are the most widely used. The principle of conductive adhesive is that the conductive particles contact each other to form a conductive path, or form a certain current path between the particles through the tunnel effect. Specifically, by setting the second conductive adhesive layer 700, the battery 10 can be easily processed and manufactured.

[0044] Furthermore, in some embodiments, the second connector 400 and the housing 100 are integrally formed. Specifically, the second connector 400 and the housing 100 can be formed through a stamping process, wherein the second connector 400 can protrude relative to the first wall 120 to connect with the second tab 220. On the one hand, the integrally formed housing 100 and second connector 400 have higher strength, which can improve the safety performance of the housing 100. On the other hand, the integrally formed housing 100 and second connector 400 can be easily processed and manufactured.

[0045] Furthermore, in some embodiments, the thickness of the second connector 400 is L, 0.1mm≤L≤0.7mm. Specifically, the thickness of the second connector 400 can be 0.1mm, 0.3mm, 0.4mm, 0.5mm or 0.7mm. When the thickness of the second connector 400 is less than 0.1mm, due to the small thickness of the second connector 400, this will cause the second connector 400 to be more difficult to process, thereby increasing the manufacturing cost of the battery 10. When the thickness of the second connector 400 is greater than 0.7mm, due to the large thickness of the second connector 400, this will cause the second connector 400 to occupy a larger space in the storage cavity 110, thereby reducing the active material of the battery 10 and making the energy density of the battery 10 lower.

[0046] Further, please refer to Figure 8In some embodiments, the first connector 300 includes a main body 310 and two protrusions 320, the two protrusions 320 are respectively connected to the two ends of the main body 310, and the protrusions 320 protrude radially relative to the main body 310. The cross-section of the first connector 300 can be in the shape of an "I". The main body 310 passes through the shell 100, so that the two protrusions 320 can be clamped on both sides of the shell 100 respectively. Among them, the first connector 300 can be insulated from the shell 100 by the insulating member 800. Specifically, the protrusion 320 is insulated and connected to the first wall 120. There is a gap or rubber between the main body 310 and the shell 100, and the insulating member 800 is located between the protrusion 320 and the shell 100. The thickness of the protrusion 320 is not less than the thickness of the second connector 400. The thickness of the protrusion 320 can be greater than the thickness of the second connector 400, or the thickness of the protrusion 320 can be equal to the thickness of the second connector 400. The distance between the housing 100 and the second tab 220 is greater than the distance between the housing 100 and the first tab 210. To effectively solve this problem, the second connector 400 can be located between the housing 100 and the second tab 220. Since the size of the first connector 300 is fixed, the thickness of the second connector 400 can be no greater than the thickness of the protrusion 320, thereby avoiding the battery 10 from being less safe under external force impact. If the thickness of the protrusion 320 is smaller than the thickness of the second connector 400, then the size of the battery cell 200 needs to be changed to avoid safety issues, which will result in higher manufacturing costs for the battery 10.

[0047] Further, please refer to Figure 5 In some embodiments, the second connector 400 is welded to the housing 100. Welding offers many advantages, including improved connection stability and strength, excellent sealing performance, a wide range of connections, simple and cost-effective processing, ease of automated production, and improved material physical properties. After the second connector 400 is welded to the housing 100, the connection between the second connector 400 and the housing 100 is more stable, extending the service life of the battery 10.

[0048] In some embodiments, an electronic device includes the battery 10 of any of the above embodiments. The battery cell 200 is placed in the storage cavity 110, and the first connector 300 and the second connector 400 are both connected to the first wall 120. The first connector 300 is electrically connected to the first tab 210, and the second connector 400 is electrically connected to the second tab 220. In the prior art, the battery 10 is not provided with the second connector 400, which results in a large difference between the distance between the first tab 210 and the housing 100 and the distance between the second tab 220 and the housing 100. The first tab 210 is unevenly stressed, which can lead to safety issues. In the present application, after the first connector 300 and the second connector 400 are provided, the difference between the distance between the first tab 210 and the housing 100 and the distance between the second tab 220 and the housing 100 is small. When the battery 10 is impacted, the first tab 210 and the second tab 220 are evenly stressed, thereby effectively preventing the first tab 210 and the second tab 220 from short-circuiting due to uneven stress. Specifically, the battery 10 can have high safety. Furthermore, the electronic device having the battery 10 can also have good safety.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A battery, characterized in that include: The housing has a storage cavity, wherein a cavity wall of the storage cavity includes a first wall; A battery cell is disposed in the storage cavity, the battery cell comprising a first tab and a second tab; a first connecting member, insulated and connected to the first wall, and the first connecting member is electrically connected to the first tab; a second connecting member connected to the first wall, the second electrode tab being electrically connected to the second connecting member; The first connecting member includes a main body and two protrusions, the two protrusions are respectively connected to the two ends of the main body, and the protrusions protrude radially relative to the main body; the protrusions are insulated and connected to the first wall, and the thickness of the protrusions is not less than the thickness of the second connecting member.

2. The battery according to claim 1, characterized in that The battery further includes a third connector electrically connected to a side of the housing facing away from the first wall.

3. The battery according to claim 2, characterized in that The third connecting member is welded to the shell, and along the thickness direction of the first wall, the projection of the third connecting member falls within the projection range of the second connecting member.

4. The battery according to claim 2, characterized in that The battery further includes a first conductive adhesive layer, and two sides of the first conductive adhesive layer are respectively adhered to the third connecting member and the shell.

5. The battery according to claim 1, characterized in that The battery further includes a second conductive adhesive layer, and two sides of the second conductive adhesive layer are respectively adhered to the second connecting member and the first wall.

6. The battery according to claim 1, characterized in that The second connecting member and the housing are an integrated structure.

7. The battery according to claim 1, characterized in that The thickness of the second connecting member is L, 0.1 mm ≤ L ≤ 0.7 mm.

8. The battery according to claim 1, characterized in that The second connecting member is welded to the housing.

9. An electronic device, characterized in that Comprising the battery according to any one of claims 1 to 8.

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