Battery and electronic equipment

Abstract

The utility model discloses a battery and electronic equipment, and the battery comprises a shell which is provided with a storage cavity; the battery cell is arranged in the storage cavity, the battery cell comprises a tab and a main body, the main body is provided with a groove, the tab is located in the groove, and the tab is electrically connected with the main body. The battery provided by the utility model can have relatively high energy density.

Description

Technical Field

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

[0002] In the related art, a battery includes a housing and an electric core. The electric core includes a main body and an electrode tab, and the electrode tab is electrically connected to an electrode post, so as to realize charge and discharge between the electric core and the outside. Among them, the electric core is placed inside the housing, and a space is left between the main body of the electric core and the housing for placing the electrode tab. Since the electrode tab will occupy the dimension of the housing in the length direction, the length of the main body is small, which will result in a low energy density of the battery. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a battery which can have a high energy density.

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

[0005] The battery according to the first aspect embodiment of the utility model includes:

[0006] A housing provided with a storage cavity;

[0007] An electric core disposed in the storage cavity, the electric core includes an electrode tab and a main body, the main body is provided with a groove, the electrode tab is located in the groove, and the electrode tab is electrically connected to the main body.

[0008] The battery according to the embodiment of the utility model has at least the following beneficial effects: The technical solution of providing a groove on the main body and disposing the electrode tab in the groove, compared with the prior art in which a gap is left between the main body and the housing for placing the electrode tab, the battery of the present application does not need to leave a gap between the main body and the housing, so there is no need to reduce the length of the main body. Therefore, this can make the battery have a high energy density. Specifically, the battery has a high energy density.

[0009] According to some embodiments of the utility model, the battery further includes two electrode posts. The electrode tab includes a first electrode tab and a second electrode tab. There are two grooves. The first electrode tab is disposed in one groove, and the second electrode tab is disposed in the other groove. One electrode post passes through the housing and is electrically connected to the first electrode tab, and the other electrode post passes through the housing and is electrically connected to the second electrode tab.

[0010] According to some embodiments of the present utility model, the battery further includes a pole column. The pole ear includes a first pole ear and a second pole ear. There are two grooves provided, the first pole ear is disposed in one of the grooves, the second pole ear is disposed in the other groove, the pole column passes through the housing and is electrically connected to the first pole ear, and the second pole ear is electrically connected to the housing.

[0011] According to some embodiments of the present utility model, the battery further includes an insulating member, and the insulating member is located between the pole column and the housing.

[0012] According to some embodiments of the present utility model, the housing has a first through hole. The insulating member includes a body portion and two protruding portions. The two protruding portions are respectively connected to both ends of the body portion, and both the protruding portions protrude relative to the body portion. The insulating member is provided with a second through hole, the body portion is disposed in the first through hole, the pole column is disposed in the second through hole, and the two protruding portions are respectively clamped on both sides of the housing.

[0013] According to some embodiments of the present utility model, the storage cavity includes a first wall, a second wall, a third wall, a fourth wall, and a fifth wall. The first wall and the second wall are oppositely arranged, the third wall and the fourth wall are oppositely arranged, the fifth wall is the wall with the largest area, and the first through hole is provided on the fifth wall.

[0014] According to some embodiments of the present utility model, the width of the pole ear is L1, and 1 mm ≤ L1 ≤ 10 mm.

[0015] According to some embodiments of the present utility model, the length of the pole ear is L2, and 1 mm ≤ L2 ≤ 20 mm.

[0016] According to some embodiments of the present utility model, the battery cell is made by a winding or lamination process.

[0017] According to an embodiment of the second aspect of the present utility model, an electronic device includes the battery according to any one of the embodiments of the first aspect.

[0018] According to the embodiment of the present utility model, the electronic device has at least the following beneficial effects: The technical solution of providing a groove on the main body and disposing the pole ear in the groove, compared with the prior art in which there is a gap between the main body and the housing for placing the pole ear, the battery of the present application does not need to leave a gap between the main body and the housing, so there is no need to reduce the length of the main body. Therefore, this can make the energy density of the battery higher. Specifically, the battery has a high energy density. Further, the electronic device having the battery has better battery life.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments, where:

[0021] Figure 1 Schematic diagram of the battery of some embodiments of the present utility model;

[0022] Figure 2 Schematic diagram of the battery cell placed in the housing in some embodiments of the present utility model;

[0023] Figure 3 Schematic diagram of the battery cell in some embodiments of the present utility model;

[0024] Figure 4 Partial schematic diagram of the battery of some embodiments of the present utility model;

[0025] Figure 5 Partial sectional schematic diagram of the battery of some embodiments of the present utility model;

[0026] Figure 6 Schematic diagram of the insulating member in some embodiments of the battery of the present utility model;

[0027] Figure 7 Schematic diagram of the pole column in some embodiments of the battery of the present utility model;

[0028] Figure 8 Schematic diagram of the housing in some embodiments of the battery of the present utility model.

[0029] Reference Signs:

[0030] Battery 10, housing 100, storage cavity 110, first wall 111, second wall 112, third wall 113, fourth wall 114, fifth wall 115, first through hole 120, battery cell 200, tab 210, main body 220, groove 221, pole column 300, insulating member 400, body portion 410, protruding portion 420, second through hole 430, cover plate 500. Detailed Description of the Embodiments

[0031] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0032] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0033] In the description of the present utility model, the meaning of several is more than one, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0034] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0035] In the description of the present utility model, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] Please refer to Figures 1 to 4 , in some embodiments, the battery 10 includes: a housing 100 and an electric core 200. The housing 100 is provided with a storage cavity 110. Among them, the material of the housing 100 can be a metal such as steel or aluminum. The shape of the housing 100 can be rectangular. Therefore, the shape of the storage cavity 110 can also be rectangular. The shape of the housing 100 can also be cylindrical or square. The electric core 200 is disposed in the storage cavity 110. The electric core 200 includes a tab 210 and a main body 220. The main body 220 is provided with a groove 221. The tab 210 is located in the groove 221, and the tab 210 is electrically connected to the main body 220. The groove 221 can refer to Figure 3 , Figure 3The tab 210 is not placed in the groove 221 on the right side of the middle for the convenience of understanding the solution. Specifically, in the technical solution where the groove 221 is provided on the main body 220 and the tab 210 is provided in the groove 221, compared with the prior art where there is a gap between the main body 220 and the housing 100 for placing the tab 210, the battery 10 of the present application does not need to leave a gap between the main body 220 and the housing 100, so there is no need to reduce the length of the main body 220. Therefore, this can make the energy density of the battery 10 relatively high. Specifically, the battery 10 has a relatively high energy density.

[0037] It should be added that the specific structure of the main body 220 can be formed by a positive electrode sheet and a negative electrode sheet, such as by a gasket process or a winding process. The tab 210 and the main body 220 can be of an integral structure, such as cutting out the tab 210 on the main body 220. Or, after the main body 220 is formed, the tab 210 is welded to the main body 220. Among them, the groove 221 on the main body 220 can specifically be that the groove 221 can be located at any position of the main body 220, such as the groove 221 is located at one end of the main body 220, or the groove 221 is located at the middle position of the main body 220. When the electrode sheet forms the main body 220, such as when forming the main body 220 by a lamination process, the electrode sheet can be set in a "convex" shape. In this case, there are two grooves 221 on the main body 220, and both grooves 221 are located on the same end of the main body 220.

[0038] Continuing to illustrate, in the prior art, the shape of the housing 100 can be a cuboid, with a length of 8 cm and a width of 4 cm. The shape of the main body 220 is also a cuboid, with a length of 7.8 cm (reserving 2 mm of space for the tab 210) and a width of 4 cm (since the thickness of the battery cell 200 remains unchanged, so comparison can be made by area). Through calculation, the area of the main body 220 is 31.2 cm 2 . In the present application, the length of the main body 220 can be 8 cm and the width can be 4 cm, and the area of the groove 221 is 0.04 cm 2 . Through calculation, the area of the main body 220 is 31.92 cm 2 . Thus, it can be seen that the area of the main body 220 in the present application is larger than the area of the main body 220 in the prior art, and the battery 10 has a relatively high energy density.

[0039] Furthermore, the following introduces how the battery cell 200 is electrically connected to the outside. Please refer to Figures 2 to 5 , Figure 5It shows that a terminal post 300 passes through the housing 100 and is electrically connected to the first tab. In some embodiments, the battery 10 further includes two terminal posts 300. The tab 210 includes a first tab and a second tab. The first tab may be the positive tab, and the second tab may be the negative tab; or, the first tab may be the negative tab, and the second tab may be the positive tab. There are two grooves 221. The first tab is disposed in one groove 221, and the second tab is disposed in the other groove 221. One terminal post 300 passes through the housing 100 and is electrically connected to the first tab. The specific manner in which one terminal post 300 passes through the housing 100 and is electrically connected to the first tab may be that the housing 100 is provided with a through hole for the terminal post 300 to pass through. Another terminal post 300 passes through the housing 100 and is electrically connected to the second tab. The specific manner in which another terminal post 300 passes through the housing 100 and is electrically connected to the second tab may be that the housing 100 is provided with a through hole for the terminal post 300 to pass through. Among them, the positive and negative electrodes of the battery cell 200 can be conducted to the outside through the terminal posts 300, so as to realize the charging and discharging of the battery cell 200.

[0040] Further, the above introduced the structure corresponding to two terminal posts 300 and two tabs 210. In some cases, the battery 10 only needs one terminal post 300. Specifically, in some embodiments, the battery 10 further includes a terminal post 300. The tab 210 includes a first tab and a second tab. The first tab may be the positive tab, and the second tab may be the negative tab; or, the first tab may be the negative tab, and the second tab may be the positive tab. There are two grooves 221. The first tab is disposed in one groove 221, and the second tab is disposed in the other groove 221. The terminal post 300 passes through the housing 100 and is electrically connected to the first tab. The specific manner in which the terminal post 300 passes through the housing 100 and is electrically connected to the first tab may be that the housing 100 is provided with a through hole for the terminal post 300 to pass through. The second tab is electrically connected to the housing 100. Specifically, when the first tab is the positive tab, after the terminal post 300 is connected to the first tab, the terminal post 300 is the positive electrode of the battery 10, and the second tab is electrically connected to the housing 100, and the housing 100 is the negative electrode of the battery 10. When the first tab is the negative tab, after the terminal post 300 is connected to the first tab, the terminal post 300 is the negative electrode of the battery 10, and the second tab is electrically connected to the housing 100, and the housing 100 is the positive electrode of the battery 10. In this embodiment, after the housing 100 is directly connected to the second tab, the battery 10 only needs one terminal post 300 to realize the conduction of the positive and negative electrodes of the battery 10 to the outside, which can reduce the manufacturing cost of the battery 10, so that the cost of the battery 10 is relatively low. Among them, the connection manner between the terminal post 300 and the tab 210 is laser welding, ultrasonic welding, rivet connection or conductive adhesive bonding. The connection manner between the tab 210 and the housing 100 is laser welding, ultrasonic welding, rivet connection or conductive adhesive bonding.

[0041] Further, when the two pole posts 300 pass through the housing 100 respectively, the material of the housing 100 is a metal material. If both pole posts 300 are in direct contact with the housing 100, then the battery 10 may short-circuit. Therefore, an insulating member 400 is required to separate the pole posts 300 from the housing 100. In addition, when there is only one pole post 300, in this case, the housing 100 is connected to the second pole ear, so the housing 100 will be charged, and this also requires the insulating member 400 to separate and insulate the pole post 300 from the housing 100. Therefore, in some embodiments, the battery 10 further includes an insulating member 400, and the insulating member 400 is located between the pole post 300 and the housing 100. By disposing the insulating member 400 between the pole post 300 and the housing 100, the short circuit of the battery 10 can be effectively prevented. Among them, the material of the insulating member 400 can be: 1. Inorganic insulating materials, such as mica, porcelain, asbestos, marble, glass, sulfur, etc. 2. Organic insulating materials, such as rubber, resin, shellac, cotton yarn paper, hemp, silk, rayon tube, etc. Resin can be further divided into natural resin and synthetic resin, and synthetic resin includes thermoplastic resin and thermosetting resin. 3. Plastic insulating materials, such as polyethylene, polypropylene, polyvinyl chloride, etc., which have good insulation performance, mechanical performance and heat resistance, and are commonly used in electrical equipment such as wire and cable, insulating sleeve, insulating board, etc. 4. Rubber insulating materials, such as nitrile rubber, propylene rubber, silicone rubber, etc., which have good elasticity and wear resistance and can maintain good insulation performance at different temperatures. 5. Glass insulating materials, such as glass fiber cloth, glass insulating paper, glass insulating tape, etc., which have excellent high temperature resistance and chemical corrosion resistance and can maintain stable insulation performance in harsh environments. 6. Ceramic insulating materials, such as alumina ceramic, zirconia ceramic, boron nitride ceramic, etc., which have excellent high temperature resistance and arc resistance and can maintain stable insulation performance in high voltage and high temperature environments.

[0042] Further, the specific structure of the insulating member 400 will be introduced in detail below. Please refer to Figure 4 and Figure 5 In some embodiments, the housing 100 has a first through hole 120. The insulating member 400 includes a body portion 410 and two protruding portions 420. The insulating member 400 can be referred to Figure 6 and the pole post 300 can be referred to Figure 7, two protruding parts 420 are respectively connected to both ends of the body part 410, and both of the two protruding parts 420 protrude relative to the body part 410. Specifically, the cross-section of the insulating part 400 can be in the shape of a "work" character. In some cases, the area of one protruding part 420 can be larger than that of the other protruding part 420, and the area of the protruding part 420 can also be larger than the area of the tab 210, so as to separate the tab 210 and the terminal 300 from the housing 100. The insulating part 400 is provided with a second through hole 430, that is, the second through hole 430 penetrates through the body part 410 and the protruding part 420. The body part 410 is arranged in the first through hole 120, the terminal 300 is arranged in the second through hole 430, and the two protruding parts 420 are respectively clamped on both sides of the housing 100. Specifically, the shape of the terminal 300 can also be in the shape of a "work" character. That the two protruding parts 420 are respectively clamped on both sides of the housing 100 can specifically be that one protruding part 420 abuts against the inner surface of the housing 100, and the other protruding part 420 abuts against the outer surface of the housing 100, so that the tab 210 and the terminal 300 in the storage cavity 110 do not contact the housing 100, and the terminal 300 outside the housing 100 does not contact the housing 100.

[0043] Further, please refer to Figure 8 , in some embodiments, the storage cavity 110 includes a first wall 111, a second wall 112, a third wall 113, a fourth wall 114, and a fifth wall 115. The first wall 111 and the second wall 112 are arranged opposite to each other, the third wall 113 and the fourth wall 114 are arranged opposite to each other, the fifth wall 115 is the wall with the largest area, and the first through hole 120 is arranged on the fifth wall 115. The first through hole 120 can refer to Figure 5 . Specifically, the shape of the storage cavity 110 can be rectangular. After the first through hole 120 is arranged on the fifth wall 115, the terminal 300 can pass through the fifth wall 115. In this case, the tab 210 can be attached to the fifth wall 115, which can facilitate the welding of the tab 210 and the main body 220, and at the same time facilitate the welding of the tab 210 and the terminal 300. In some other embodiments, the first through hole 120 can also be arranged on the first wall 111, the first through hole 120 can also be arranged on the second wall 112, the first through hole 120 can also be arranged on the third wall 113, and the first through hole 120 can also be arranged on the fourth wall 114. In addition to the housing 100, the battery 10 further includes a cover plate 500, and the cover plate 500 is welded to the housing 100 to seal the opening of the storage cavity 110.

[0044] Further, in some embodiments, the width of the tab 210 is L1, where 1 mm ≤ L1 ≤ 10 mm. The width of the tab 210 can be 1 mm, 2 mm, 4 mm, 6 mm, 8 mm, or 10 mm. Specifically, when the width of the tab 210 is greater than 10 mm, the width of the tab 210 is too large, which will increase the internal resistance of the tab 210, thereby restricting the transmission of current; in addition, the excessive width of the tab 210 will also result in waste of materials, further increasing the cost of the battery 10. When the width of the tab 210 is less than 1 mm, the too small width of the tab 210 will increase the processing difficulty and reduce the yield of the product.

[0045] Further, in some embodiments, the length of the tab 210 is L2, where 1 mm ≤ L2 ≤ 20 mm. The length of the tab 210 can be 1 mm, 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, 15 mm, 18 mm, or 20 mm. Specifically, when the length of the tab 210 is greater than 20 mm, the length of the tab 210 is too large, which will increase the internal resistance of the tab 210, thereby restricting the transmission of current; in addition, the excessive length of the tab 210 will also result in waste of materials, further increasing the cost of the battery 10. When the length of the tab 210 is less than 1 mm, the too small length of the tab 210 will increase the processing difficulty and reduce the yield of the product.

[0046] Further, in some embodiments, the battery cell 200 is formed by winding or stacking processes. Specifically, the winding process is to wind the separated positive electrode sheet, separator, and negative electrode sheet in a certain order around a fixed winding needle and squeeze them into a cylindrical, elliptical cylindrical, or square shape. Then the battery cell 200 is formed. The stacking process is to cut the positive electrode sheet and the negative electrode sheet into small pieces, and then stack them together with the separator film to form a small battery cell monomer. Then, these small battery cell monomers are stacked and connected in parallel to form a large battery cell 200. Among them, there are multiple current collectors on the main body 220 of the battery cell 200, and the multiple current collectors can be connected to the tab 210, thereby accelerating the speed of current entering each electrode sheet, which can improve the charging efficiency of the battery 10.

[0047] In some embodiments, the electronic device includes the battery 10 of any one of the above embodiments. In the technical solution where a groove 221 is provided on the main body 220 and the tab 210 is arranged in the groove 221, compared with the prior art technical solution where there is a gap between the main body 220 and the housing 100 for placing the tab 210, the battery 10 of the present application does not need to leave a gap between the main body 220 and the housing 100, so there is no need to reduce the length of the main body 220. Therefore, this can make the energy density of the battery 10 relatively high. Specifically, the battery 10 has a relatively high energy density. Further, the electronic device with this battery 10 has better endurance.

[0048] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model. In addition, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

Claims

1. A battery, characterized in that, Comprising: A housing provided with a storage cavity; An electrode assembly disposed in the storage cavity, the electrode assembly including tab ears and a main body, the main body being provided with grooves, the tab ears being located in the grooves, and the tab ears being electrically connected to the main body; The battery further includes two pole columns, the tab ears include a first tab ear and a second tab ear, there are two grooves, the first tab ear is disposed in one of the grooves, the second tab ear is disposed in the other groove, one pole column passes through the housing and is electrically connected to the first tab ear, and the other pole column passes through the housing and is electrically connected to the second tab ear; The battery further includes an insulating member located between the pole column and the housing; The housing has a first through hole, the insulating member includes a body portion and two protruding portions, the two protruding portions are respectively connected to two ends of the body portion, and both of the protruding portions protrude relative to the body portion, the insulating member is provided with a second through hole, the body portion is disposed in the first through hole, the pole column is disposed in the second through hole, and the two protruding portions are respectively clamped on both sides of the housing; The storage cavity includes a first wall, a second wall, a third wall, a fourth wall and a fifth wall, the first wall and the second wall are oppositely disposed, the third wall and the fourth wall are oppositely disposed, the fifth wall is the wall with the largest area, and the first through hole is disposed on the fifth wall.

2. A battery, characterized in that, Comprising: A housing provided with a storage cavity; An electrode assembly disposed in the storage cavity, the electrode assembly including tab ears and a main body, the main body being provided with grooves, the tab ears being located in the grooves, and the tab ears being electrically connected to the main body; The battery further includes a pole column, the tab ears include a first tab ear and a second tab ear, there are two grooves, the first tab ear is disposed in one of the grooves, the second tab ear is disposed in the other groove, the pole column passes through the housing and is electrically connected to the first tab ear, and the second tab ear is electrically connected to the housing; The battery further includes an insulating member located between the pole column and the housing; The housing has a first through hole, the insulating member includes a body portion and two protruding portions, the two protruding portions are respectively connected to two ends of the body portion, and both of the protruding portions protrude relative to the body portion, the insulating member is provided with a second through hole, the body portion is disposed in the first through hole, the pole column is disposed in the second through hole, and the two protruding portions are respectively clamped on both sides of the housing; The storage cavity includes a first wall, a second wall, a third wall, a fourth wall and a fifth wall, the first wall and the second wall are oppositely disposed, the third wall and the fourth wall are oppositely disposed, the fifth wall is the wall with the largest area, and the first through hole is disposed on the fifth wall.

3. The battery according to claim 1 or 2, characterized in that, The width of the tab ear is L1, and 1 mm ≤ L1 ≤ 10 mm.

4. The battery according to claim 1 or 2, characterized in that, The length of the tab ear is L2, and 1 mm ≤ L2 ≤ 20 mm.

5. The battery according to claim 1 or 2, characterized in that, The electrode assembly is made by a winding or stacking process.

6. An electronic device, characterized in that, Comprising the battery according to any one of claims 1 to 5.

Images