Battery protection unit, battery and electronic equipment

Abstract

The utility model discloses a battery protection unit, a battery and electronic equipment, and relates to the technical field of batteries. The battery protection unit comprises a circuit board with a main body part and an extension part, and a thermistor arranged on the extension part. The extension part is arranged on one side of the main body part and is electrically connected with the main body part, a first electric connecting piece and a second electric connecting piece which are electrically connected with the extension part are arranged on the extension part, the first electric connecting piece is used for being electrically connected with a positive electrode of a battery cell, and the second electric connecting piece is used for being electrically connected with a negative electrode of the battery cell. And the thermistor is electrically connected with the extension part, is positioned between the first electric connecting piece and the second electric connecting piece, and is arranged close to the battery cell after the battery protection unit and the battery cell are assembled. According to the battery protection unit provided by the invention, the distance between the thermistor and the battery cell is shortened, and the influence of components on the main body part on the thermistor is reduced, so that the temperature detection precision of the battery protection unit on the battery cell is improved, and the use safety and use performance of the battery cell are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery protection unit, a battery and an electronic device. Background Art

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art.

[0003] Mobile phones, tablet computers, laptop computers and other electronic devices are usually equipped with battery protection units to monitor the usage status of the battery cells to ensure the safety and performance of the battery cells.

[0004] In the related art, the circuit board of the battery protection unit is electrically connected to the battery cell through a nickel sheet, and the real-time temperature of the battery cell is detected through a thermistor. However, the detection accuracy of the thermistor is easily affected by other components on the circuit board and is far away from the battery cell, resulting in a large difference between the detected battery cell temperature and the actual temperature, which is not conducive to the safety and performance of the battery cell. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide a battery protection unit, a battery and an electronic device, aiming to solve the technical problem in the related art that the detection accuracy of the thermistor is easily affected by surrounding components and is far away from the battery cell, resulting in a large difference between the detected battery cell temperature and the actual temperature.

[0006] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0007] In a first aspect, an embodiment of the present application provides a battery protection unit, comprising:

[0008] A circuit board, comprising a main body and an extension, wherein the extension is arranged on one side of the main body and electrically connected to the main body, and the extension is provided with a first electrical connector and a second electrical connector electrically connected thereto, wherein the first electrical connector is used to electrically connect to a positive electrode of a battery cell, and the second electrical connector is used to electrically connect to a negative electrode of the battery cell;

[0009] A thermistor is disposed on the extension portion and located between the first electrical connector and the second electrical connector. The thermistor is electrically connected to the extension portion and is disposed close to the battery cell after the battery protection unit and the battery cell are assembled.

[0010] In one embodiment of the first aspect, the extension portion has a copper-plated area and a non-copper-plated area, the extension portion is electrically connected to the main body portion through the copper-plated area, and the thermistor is located in the non-copper-plated area and electrically connected to the copper-plated area.

[0011] In one embodiment of the first aspect, the distance between the thermistor and the first electrical connector is L1, and the distance between the thermistor and the second electrical connector is L2, satisfying: 0.5≤L1 / L2≤2.

[0012] In one embodiment of the first aspect, the battery cell protection unit further includes an insulating film, wherein the insulating film is connected to the extension portion and covers the thermistor.

[0013] In one embodiment of the first aspect, a distance between a side of the main body away from the extension portion and a side of the extension portion away from the main body is L3, and a distance between the thermistor and a side of the main body away from the extension portion is L4, satisfying: 0.5≤L4 / L3≤0.9.

[0014] In one embodiment of the first aspect, the distance between a side of the main body away from the extension portion and a side where the main body and the extension portion are connected is L5, and the distance between a side where the extension portion is connected to the main body and a side where the extension portion is away from the main body is L6, satisfying: 1≤L6 / L5≤3.

[0015] In one embodiment of the first aspect, the first electrical connector is a first nickel sheet, the second electrical connector is a second nickel sheet, the first nickel sheet is used to be welded to the positive electrode of the battery cell, and the second nickel sheet is used to be welded to the negative electrode of the battery cell.

[0016] In a second aspect, an embodiment of the present application further provides a battery, comprising a battery cell and a battery protection unit electrically connected to the battery cell, wherein the battery protection unit is the battery protection unit described in any of the above embodiments.

[0017] In one embodiment of the second aspect, a side of the extension portion away from the main body portion is spaced apart from a body of the battery core.

[0018] In a third aspect, an embodiment of the present application further provides an electronic device, comprising a main board and a battery electrically connected to the main board, wherein the battery is the battery described in any of the above embodiments.

[0019] The beneficial effects of this application are:

[0020] The present application provides a battery protection unit, including a circuit board and a thermistor. By arranging a first electrical connector and a second electrical connector on an extension portion of the circuit board, and arranging a thermistor between the first electrical connector and the second electrical connector, the thermistor is electrically connected to the extension portion, so that the thermistor is closer to the battery cell, shortening the distance between the thermistor and the battery cell, and also reducing the influence of components on the main body of the circuit board on the thermistor, thereby improving the temperature detection accuracy of the battery cell by the battery protection unit, and improving the safety and performance of the battery cell.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the assembly structure of a battery protection unit and a battery cell in some embodiments of the present application is shown;

[0024] Figure 2 A schematic diagram of the structure of a battery protection unit from one perspective in some embodiments of the present application is shown.

[0025] Description of main component symbols:

[0026] 100 - battery protection unit; 110 - circuit board; 111 - main body; 112 - extension part; 120 - first electrical connector; 130 - second electrical connector; 140 - thermistor; 150 - insulating film; 200 - battery cell; 210 - main body; 220 - positive electrode; 230 - negative electrode. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and 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 only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] like Figure 2 As shown, in the first aspect, an embodiment of the present application provides a battery protection unit 100, which relates to the field of battery technology and is mainly used in a battery having a battery cell 200, for monitoring the use status of the battery cell 200 and protecting the battery cell 200.

[0033] like Figure 1 and Figure 2As shown, the battery protection unit 100 mainly includes a circuit board 110 and a thermistor 140 .

[0034] The circuit board 110 includes a main body 111 and an extension 112. The extension 112 is disposed on one side of the main body 111 and is electrically connected to the main body 111. The extension 112 is provided with a first electrical connector 120 and a second electrical connector 130. The first electrical connector 120 and the second electrical connector 130 are both electrically connected to the extension 112. The first electrical connector 120 is used to electrically connect to the positive electrode 220 of the battery cell 200, and the second electrical connector 130 is used to electrically connect to the negative electrode 230 of the battery cell 200. The thermistor 140 is disposed on the extension 112 and is located between the first electrical connector 120 and the second electrical connector 130. The thermistor 140 is electrically connected to the extension 112, and after the battery protection unit 100 and the battery cell 200 are assembled, the thermistor 140 is disposed close to the battery cell 200.

[0035] Exemplarily, the thermistor 140 is a negative temperature coefficient thermistor (NTC). Of course, the thermistor 140 may also be a positive temperature coefficient thermistor (PTC). The circuit board 110 may be a printed circuit board (PCB) or a flexible printed circuit board (FPC).

[0036] In the related art, the battery includes a battery protection unit and a battery cell. The circuit board of the battery protection unit is electrically connected to the battery cell through a nickel sheet, and the real-time temperature of the battery cell is detected by a thermistor. However, the detection accuracy of the thermistor is easily affected by other components on the circuit board and is far away from the battery cell, resulting in a large difference between the detected battery cell temperature and the actual temperature, which is not conducive to the safety and performance of the battery cell.

[0037] It can be understood that the battery protection unit 100 provided in this embodiment, by arranging the first electrical connector 120 and the second electrical connector 130 on the extension portion 112 of the circuit board 110, and arranging the thermistor 140 between the first electrical connector 120 and the second electrical connector 130, so that the thermistor 140 is electrically connected to the extension portion 112, so that the thermistor 140 is closer to the battery cell 200, shortening the distance between the thermistor 140 and the battery cell 200, and also reducing the influence of the components on the main body 111 of the circuit board 110 on the thermistor 140, thereby improving the temperature detection accuracy of the battery protection unit 100 for the battery cell 200, and improving the safety and performance of the battery cell 200.

[0038] In one embodiment, the extension portion 112 has a copper-plated area and a non-copper-plated area. The extension portion 112 is electrically connected to the main portion 111 through the copper-plated area. The thermistor 140 is located in the non-copper-plated area and electrically connected to the copper-plated area.

[0039] It should be noted that the “copper-clad area” refers to a portion of the extension portion 112 where copper is laid, and the internal circuit is electrically connected via the copper. The “non-copper-clad area” refers to a portion of the extension portion 112 where no copper is laid.

[0040] It should be pointed out that in the copper-plated area, the heat of the copper sheet will be transferred to the thermistor 140, causing interference to the thermistor 140, resulting in a difference between the temperature detected by the battery protection unit 100 and the actual temperature of the battery cell 200, thereby reducing the temperature detection accuracy.

[0041] In this embodiment, the thermistor 140 is located in the non-copper-plated area and is electrically connected to the copper-plated area. In this way, the electrical connection between the thermistor 140 and the circuit board 110 can be achieved, and the influence of the heat in the copper-plated area on the thermistor 140 can be reduced, so that the temperature detected by the battery protection unit 100 is closer to the actual temperature of the battery cell 200, thereby improving the safety and performance of the battery cell 200.

[0042] like Figure 2 As shown, in one embodiment, the distance between the thermistor 140 and the first electrical connector 120 is L1, and the distance between the thermistor 140 and the second electrical connector 130 is L2, satisfying: 0.5≤L1 / L2≤2.

[0043] Exemplarily, L1 / L2 is set to 1, that is, the distance between the thermistor 140 and the first electrical connector 120 is equal to the distance between the thermistor 140 and the second electrical connector 130, that is, the thermistor 140 is located in the middle of the first electrical connector 120 and the second electrical connector 130. Of course, L1 / L2 can also be set to 0.5, 0.6, 0.8, 0.9, 1.1, 1.2, 1.5, 1.8, 2, etc. The specific values ​​of L1 and L2 can be set on the premise of satisfying the above relationship, and will not be listed here.

[0044] It should be noted that when the first electrical connector 120 and the second electrical connector 130 are electrically connected to the battery cell 200, the first electrical connector 120 and the second electrical connector 130 will heat up with the use of the battery cell 200. If L1 / L2 is too large, the closer the thermistor 140 is to the second electrical connector 130, the temperature of the second electrical connector 130 will affect the thermistor 140, reducing the temperature detection accuracy. If L1 / L2 is too small, the closer the thermistor 140 is to the first electrical connector 120, the temperature of the first electrical connector 120 will also affect the thermistor 140, also reducing the temperature detection accuracy.

[0045] In this embodiment, by controlling L1 / L2 within the range of 0.5 to 2, the thermistor 140 is located in the middle position between the first electrical connector 120 and the second electrical connector 130. This can improve the effect of the heating temperature of the first electrical connector 120 and the second electrical connector 130 on the thermistor 140, thereby improving the detection accuracy of the battery protection unit 100 for the temperature of the battery cell 200.

[0046] like Figure 2 As shown, in one embodiment, the battery protection unit 100 further includes an insulating film 150 , which is connected to the extension portion 112 and covers the thermistor 140 .

[0047] Exemplarily, the insulating film 150 may be connected to the extension portion 112 by bonding, welding, coating, or the like.

[0048] In this embodiment, an insulating film 150 is provided on the extension portion 112, and the thermistor 140 is covered with the insulating film 150, so that the thermistor 140 is isolated from the external environment. In this way, the interference of surrounding components to the thermistor 140 can be improved. At the same time, the insulating film 150 also plays a role in protecting the thermistor 140, thereby improving the performance and service life of the thermistor 140.

[0049] like Figure 2 As shown, in one embodiment, the distance between the side of the main body 111 away from the extension portion 112 and the side of the extension portion 112 away from the main body 111 is L3, and the distance between the thermistor 140 and the side of the main body 111 away from the extension portion 112 is L4, satisfying: 0.5≤L4 / L3≤0.9.

[0050] Exemplarily, L4 / L3 can be set to 0.7, that is, the distance between the thermistor 140 and the side of the main body 111 away from the extension 112 is 70% of the distance between the side of the main body 111 away from the extension 112 and the side of the extension 112 away from the main body 111. Of course, L4 / L3 can also be set to 0.5, 0.55, 0.6, 0.65, 0.72, 0.75, 0.8, 0.86, 0.9, etc. The specific values ​​of L3 and L4 can be set on the premise of satisfying the above relationship.

[0051] It should be noted that if the value of L4 / L3 is too small, the thermistor 140 will be closer to the main body 111 and away from the battery cell 200, which will increase the interference of the components on the main body 111 on the thermistor 140, thereby affecting the accuracy of temperature detection of the battery cell 200. If the value of L4 / L3 is too large, the thermistor 140 will be too close to the battery cell 200, making it inconvenient to assemble the thermistor 140 and the extension portion 112.

[0052] In this embodiment, by making the distance between the thermistor 140 and the side of the main body 111 away from the extension portion 112 50% to 90% of the distance between the side of the main body 111 away from the extension portion 112 and the side of the extension portion 112 away from the main body 111, it is achieved that the thermistor 140 is as far away from the main body 111 as possible and close to the battery cell 200 on the basis of facilitating the assembly of the thermistor 140 and the extension portion 112, thereby shortening the distance between the thermistor 140 and the battery cell 200, and reducing the influence of the components on the main body 111 on the thermistor 140, thereby improving the temperature detection accuracy of the battery protection unit 100 for the battery cell 200.

[0053] Continue reading Figure 2 In one embodiment, the distance between the side of the main body 111 away from the extension portion 112 and the side where the main body 111 and the extension portion 112 are connected is L5, and the distance between the side where the extension portion 112 and the main body 111 are connected and the side where the extension portion 112 is away from the main body 111 is L6, satisfying: 1≤L6 / L5≤3.

[0054] Exemplarily, L6 / L5 can be set to 1. Of course, L6 / L5 can also be set to 1.2, 1.5, 1.6, 1.8, 2, 2.3, 2.5, 2.8, 3, etc. The specific values ​​of L6 and L5 can be set on the premise of satisfying the above relationship.

[0055] It should be noted that if the value of L6 / L5 is too small, the thermistor 140 will be close to the main body 111 and away from the battery cell 200, which will increase the interference of the components on the main body 111 on the thermistor 140, thereby affecting the accuracy of temperature detection of the battery cell 200. If the value of L6 / L5 is too large, the size of the circuit board 110 will be too large, which is not conducive to the miniaturization design of the battery protection unit 100.

[0056] In this embodiment, by controlling the distance between the side where the extension portion 112 is connected to the main body 111 and the side where the extension portion 112 is away from the main body 111 to 1 to 3 times the distance between the side where the main body 111 is away from the extension portion 112 and the side where the main body 111 is connected to the extension portion 112, the interference of components on the main body 111 on the thermistor 140 can be reduced, thereby improving the accuracy of temperature detection.

[0057] In one embodiment, the first electrical connector 120 is a first nickel sheet, and the second electrical connector 130 is a second nickel sheet. The first nickel sheet is used to be welded to the positive electrode 220 of the battery cell 200 , and the second nickel sheet is used to be welded to the negative electrode 230 of the battery cell 200 .

[0058] In this embodiment, the circuit board 110 is welded to the positive electrode 220 of the battery cell 200 through a first nickel sheet, and is welded to the negative electrode 230 of the battery cell 200 through a second nickel sheet. Since nickel has good electrical conductivity, corrosion resistance and mechanical strength, the battery protection unit 100 and the battery cell 200 can form a stable electrical connection, reduce the probability of failure, and extend the service life of the battery protection unit 100 and the battery cell 200.

[0059] In another embodiment, the first electrical connector 120 and the second electrical connector 130 may also be copper sheets, aluminum sheets or metal composite materials. The metal composite material is, for example, copper coated on a nickel sheet, combining the good conductivity of copper and the corrosion resistance of nickel.

[0060] In a second aspect, an embodiment of the present application provides a battery, including a battery cell 200 and a battery protection unit 100 in any of the above embodiments. The first electrical connector 120 is electrically connected to the positive electrode 220 of the battery cell 200 , and the second electrical connector 130 is electrically connected to the negative electrode 230 of the battery cell 200 .

[0061] like Figure 1As shown, in one embodiment, the side of the extension portion 112 away from the main body 111 is spaced apart from the body 210 of the battery cell 200. In this way, the phenomenon that the heat of the battery cell 200 is transferred to the thermistor 140 through the circuit board 110 can be improved, the influence of the external environment on the thermistor 140 is reduced, and the temperature detection accuracy of the battery protection unit 100 is improved. In another embodiment, the side of the extension portion 112 away from the main body 111 can also abut against the body 210 of the battery cell 200.

[0062] In a third aspect, an embodiment of the present application provides an electronic device, comprising a mainboard and a battery in any of the above embodiments, wherein the battery is electrically connected to the mainboard. For example, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a headset, etc.

[0063] It can be understood that, since the electronic device provided in this embodiment has the battery protection unit 100 in any of the above embodiments, it has all the beneficial effects of the battery protection unit 100, which will not be listed one by one here.

[0064] In one embodiment, the battery cell 200 is a soft-pack battery cell, the positive electrode 220 is a positive electrode ear, and the negative electrode 230 is a negative electrode ear. The soft-pack battery cell is generally suitable for mobile phones, tablet computers, etc. The positive and negative electrode sheets inside the soft-pack battery cell are led out as the positive electrode 220 and the negative electrode 230, the first electrical connector 120 is electrically connected to the positive electrode ear, and the second electrical connector 130 is electrically connected to the negative electrode ear, so that the battery protection unit 100 is electrically connected to the soft-pack battery cell.

[0065] In another embodiment, the battery cell 200 may also be a square battery cell or a cylindrical battery cell. Both the square battery cell and the cylindrical battery cell have a positive electrode column and a negative electrode column. The first electrical connector 120 is electrically connected to the positive electrode column, and the second electrical connector 130 is electrically connected to the negative electrode column, thereby realizing an electrical connection between the battery protection unit 100 and the square battery cell or the cylindrical battery cell.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 application. In this specification, the schematic representations 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 one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery protection unit, characterized in that: include: A circuit board (110), comprising a main body (111) and an extension (112), wherein the extension (112) is arranged on one side of the main body (111) and is electrically connected to the main body (111), and the extension (112) is provided with a first electrical connector (120) and a second electrical connector (130) electrically connected thereto, wherein the first electrical connector (120) is used to be electrically connected to a positive electrode (220) of a battery cell (200), and the second electrical connector (130) is used to be electrically connected to a negative electrode (230) of the battery cell (200); A thermistor (140) is disposed on the extension portion (112) and is located between the first electrical connector (120) and the second electrical connector (130); the thermistor (140) is electrically connected to the extension portion (112) and is disposed close to the battery cell (200) after the battery protection unit and the battery cell (200) are assembled.

2. The battery protection unit according to claim 1, characterized in that: The extension portion (112) has a copper-plated area and a non-copper-plated area, the extension portion (112) is electrically connected to the main body (111) via the copper-plated area, and the thermistor (140) is located in the non-copper-plated area and electrically connected to the copper-plated area.

3. The battery protection unit according to claim 1, characterized in that: The distance between the thermistor (140) and the first electrical connector (120) is L1, and the distance between the thermistor (140) and the second electrical connector (130) is L2, satisfying: 0.5≤L1 / L2≤2.

4. The battery protection unit according to claim 1, characterized in that: The battery protection unit further comprises an insulating film (150), wherein the insulating film (150) is connected to the extension portion (112) and covers the thermistor (140).

5. The battery protection unit according to any one of claims 1 to 4, characterized in that: The distance between a side of the main body (111) away from the extension part (112) and a side of the extension part (112) away from the main body (111) is L3, and the distance between the thermistor (140) and a side of the main body (111) away from the extension part (112) is L4, satisfying: 0.5≤L4 / L3≤0.

9.

6. The battery protection unit according to any one of claims 1 to 4, characterized in that: The distance between a side of the main body (111) away from the extension part (112) and a side where the main body (111) and the extension part (112) are connected is L5, and the distance between a side where the extension part (112) and the main body (111) are connected and a side where the extension part (112) is away from the main body (111) is L6, satisfying: 1≤L6 / L5≤3.

7. The battery protection unit according to any one of claims 1 to 4, characterized in that: The first electrical connector (120) is a first nickel sheet, the second electrical connector (130) is a second nickel sheet, the first nickel sheet is used to be welded to the positive electrode (220) of the battery cell (200), and the second nickel sheet is used to be welded to the negative electrode (230) of the battery cell (200).

8. A battery, comprising a battery cell (200) and a battery protection unit electrically connected to the battery cell (200), characterized in that: The battery protection unit is the battery protection unit according to any one of claims 1 to 7.

9. The battery according to claim 8, characterized in that The extension portion (112) is arranged at a distance from a side of the main body portion (111) and a body (210) of the battery cell (200).

10. An electronic device comprising a mainboard and a battery electrically connected to the mainboard, characterized in that: The battery is the battery according to claim 8 or 9.

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