Battery and electric device

Abstract

The utility model relates to lithium battery technical field discloses a kind of battery and electric device, comprising: electric core, including metal shell and electric core body;First pole, with electric core body is connected, and it is set on the metal shell end face and is penetrated;Battery protection board, with first pole is connected;Second pole, and first pole polarity is opposite, second pole is connected between electric core body and metal shell;First electric connecting piece, with metal shell is connected, and it is stretched out outside metal shell.Electric core body's first polarity is connected to battery protection board by first pole, and electric core body's second polarity is connected to first electric connecting piece by second pole and metal shell, to take example for battery protection board connection to positive terminal, then first electric connecting piece is connected to negative terminal, so that battery protection board is isolated with negative terminal, if the electronic device of battery protection board accidentally contact with other metal piece also cannot form circuit loop, reduce the risk of short circuit in production assembly process, improve battery yield.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a battery and an electrical device. Background Technology

[0002] Lithium-ion batteries, with their superior energy density, long cycle life, and low self-discharge rate, have seen their applications expand beyond traditional portable electronic devices. For example, in consumer electronics, devices such as mobile phones, digital cameras, and laptops are increasingly reliant on lithium-ion batteries. In the power energy sector, large and medium-sized electric vehicles, electric bicycles, and power tools are also seeing significant applications due to the outstanding performance of lithium-ion batteries in terms of range and power output.

[0003] Lithium-ion batteries can be classified into hard-case batteries and soft-pack batteries based on the characteristics of their cell casing. Hard-case batteries are further subdivided into steel-cased batteries and aluminum-cased batteries based on their material. Compared to aluminum-cased batteries, steel-cased batteries have become a focus of research in the industry due to their superior pressure resistance.

[0004] In related technologies, for steel-cased batteries, the battery protection board is connected to both the positive and negative terminals simultaneously via nickel strips. However, during the production and assembly of steel-cased batteries, if electronic components on the battery protection board, such as MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), capacitors, and resistors, accidentally come into contact with other metal parts, a short circuit can occur, leading to poor battery performance or even overall battery malfunction. Utility Model Content

[0005] This utility model provides a battery and an electrical device to solve or improve the problem in the related technology that if electronic components on the battery protection board accidentally come into contact with other metal parts during the production and assembly of steel-cased batteries, a short circuit can easily occur, leading to poor battery performance or even overall functional failure.

[0006] In a first aspect, this utility model provides a battery, comprising:

[0007] A battery cell includes a metal casing and a battery cell body disposed within the metal casing;

[0008] The first terminal is connected to the battery cell body and is disposed through the end face of the metal casing;

[0009] The battery protection board is connected to the first terminal post;

[0010] The second terminal has the opposite polarity to the first terminal and is connected between the cell body and the metal casing.

[0011] The first electrical connector is connected to the metal housing and extends outside the metal housing.

[0012] In one alternative embodiment, the first electrical connector is a flexible electrical connector.

[0013] In one alternative embodiment, the metal housing includes a pair of opposing first sides and a pair of opposing second sides, wherein the area of ​​the first sides is larger than the area of ​​the second sides.

[0014] The first electrical connector extends along the first side and protrudes outside the metal housing.

[0015] In one alternative embodiment, the first electrical connection includes:

[0016] The first connecting piece is attached to and connected to the first side surface;

[0017] The second connecting piece is connected to the first connecting piece. The second connecting piece extends along the first side and extends out of the metal housing. The extended end of the second connecting piece is provided with a first connector.

[0018] In one alternative implementation, it further includes:

[0019] The second electrical connector is provided on the side of the first terminal post. One end of the second electrical connector is connected to the surface of the battery protection board opposite to the metal casing, and the other end is connected to the top of the first terminal post to conduct electricity between the battery protection board and the first terminal post.

[0020] In one alternative implementation, it further includes:

[0021] The third electrical connector is disposed on the side of the battery protection plate opposite to the metal casing.

[0022] In one alternative implementation, the third electrical connector is a flexible electrical connector.

[0023] In one alternative embodiment, the third electrical connection includes:

[0024] The third connecting piece is disposed on the side of the battery protection board opposite to the metal casing;

[0025] The fourth connecting piece is bent and connected to the third connecting piece, and the end of the fourth connecting piece is provided with a second connector.

[0026] Secondly, this utility model also provides an electrical device, including a battery as described in any of the above claims.

[0027] In one alternative implementation, it further includes:

[0028] The motherboard has a first connecting part and a second connecting part. The protruding end of the first electrical connector is connected to the first connecting part, and the battery protection board is connected to the second connecting part through a third electrical connector.

[0029] The battery provided by this utility model has a first polarity of the cell body connected to the battery protection board through a first terminal, and a second polarity of the cell body connected to the first electrical connector through a second terminal and a metal casing. Taking the battery protection board connected to the positive terminal as an example, the first electrical connector is connected to the negative terminal, thereby isolating the battery protection board from the negative terminal. If the electronic components on the battery protection board accidentally come into contact with other metal parts, a circuit loop will not be formed, reducing the risk of short circuits during production and assembly and improving the battery yield. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a perspective view of the battery according to an embodiment of the present utility model;

[0032] Figure 2 This is an exploded view of the battery according to an embodiment of the present invention;

[0033] Figure 3 This is a front view of the battery according to an embodiment of the present invention;

[0034] Figure 4 This is a perspective view of the electrical device according to an embodiment of the present utility model;

[0035] Figure 5 This is an exploded view of the electrical device according to an embodiment of the present utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Battery cell; 101. Metal casing; 1011. Top surface; 1012. First side surface; 1013. Second side surface; 1014. Bottom surface; 2. First terminal post; 3. Battery protection board; 4. First electrical connector; 401. First connecting piece; 402. Second connecting piece; 403. Protruding end; 5. First connector; 6. Second electrical connector; 7. Third electrical connector; 701. Third connecting piece; 702. Fourth connecting piece; 8. Second connector; 9. Main board; 901. First connecting part; 902. Second connecting part. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The following is combined with Figures 1 to 5 This describes the battery and power-consuming device according to embodiments of the present utility model.

[0043] According to an embodiment of this utility model, in one aspect, a battery is provided, including a battery cell 1, a first terminal 2, a second terminal, a battery protection board 3, and a first electrical connector 4. Specifically, as... Figure 1 As shown, the battery cell 1 includes a metal casing 101 and a cell body disposed within the metal casing 101. Optionally, the metal casing 101 is a steel casing or an aluminum casing. Preferably, the battery cell 1 is a steel-cased battery cell, which has advantages such as a small coefficient of expansion, high volume ratio, and good reliability. The first terminal 2 is connected to the cell body, and the first terminal 2 is disposed through the end face of the metal casing 101. The battery protection board 3 is connected to the first terminal 2. Optionally, as... Figure 2 As shown, the first terminal 2 is located on the top surface 1011 of the metal casing 101. The second terminal has the opposite polarity to the first terminal 2 and is connected between the battery cell body and the metal casing 101. The first electrical connector 4 is connected to the metal casing 101 and extends outside the metal casing 101.

[0044] Specifically, taking the first terminal 2 as the positive terminal as an example, the positive tab of the battery cell body is connected to the positive terminal, and the positive terminal is connected to the battery protection board 3. Thus, the positive terminal of the battery cell 1 can be led out from the battery protection board 3 as the VCC (Voltage Common Collector) power supply terminal. The second terminal is the negative terminal. The negative tab of the battery cell body is connected to the negative terminal, and the negative terminal is connected to the metal casing 101. The metal casing 101 is connected to the first electrical connector 4. Thus, the negative terminal of the battery cell 1 can be led out from the first electrical connector 4 as the GND (Ground) terminal. Further, taking a mobile phone as an example, the battery protection board 3 and the first electrical connector 4 are each individually connected to the motherboard 9 to form a current loop, thereby providing power to the mobile phone.

[0045] With this configuration, the first polarity of the battery cell is connected to the battery protection board 3 via the first terminal 2, and the second polarity of the battery cell is connected to the first electrical connector 4 via the second terminal and the metal casing 101. Taking the battery protection board 3 connected to the positive terminal as an example, the first electrical connector 4 is connected to the negative terminal. Thus, the battery protection board 3 only leads out the positive terminal, which is isolated from and independently arranged from the negative terminal, and vice versa. If the electronic components on the battery protection board 3 accidentally come into contact with other metal components, a current loop will not be formed. For example, during the welding process, if the capacitors, resistors, or other components on the battery protection board 3 accidentally come into contact with the metal welding claws, a loop cannot be formed because the battery protection board 3 is only attached to a single pole of the battery cell 1. This reduces the risk of short circuits during production and assembly, improves the battery yield, and reduces the manufacturing difficulty of the battery.

[0046] Optionally, in some embodiments of this utility model, the first electrical connector 4 is a flexible electrical connector. Specifically, the first electrical connector 4 is an FPC (Flexible Printed Circuit) or an FDC (Flexible Die-cutting Circuit). This arrangement utilizes the bendable characteristics of the flexible electrical connector to allow obstacles (such as cameras, vibration motors, etc.) to be bypassed between the battery and the motherboard 9, saving internal space, optimizing spatial layout, and facilitating assembly.

[0047] Optionally, in some embodiments of this utility model, such as Figure 2 As shown, the metal housing 101 includes a pair of opposing first side surfaces 1012 and a pair of opposing second side surfaces 1013, wherein the area of ​​the first side surface 1012 is larger than the area of ​​the second side surface 1013. A first electrical connector 4 extends along the first side surface 1012 and protrudes outside the metal housing 101. Specifically, the first electrical connector 4 and the first side surface 1012 can be connected and fixed by resistance welding or laser welding, etc.

[0048] This configuration, where the first electrical connector 4 is directly connected to the large surface of the battery cell 1, reduces internal resistance, helps minimize energy loss during charging and discharging, and improves efficiency. Furthermore, in some embodiments, the first electrical connector 4 can also be attached to the second side 1013 or bottom 1014 of the metal casing 101. Additionally, text or patterns can be printed on the surface of the first electrical connector 4 for personalized and customized designs.

[0049] Optionally, in some embodiments of this utility model, such as Figure 2As shown, the first electrical connector 4 includes a first connecting piece 401 and a second connecting piece 402 connected to the first connecting piece 401. The first connecting piece 401 is fitted and connected to the first side surface 1012, and the second connecting piece 402 extends along the first side surface 1012 and protrudes outside the metal housing 101. The second connecting piece 402 is used to connect to the motherboard 9, and the protruding end 403 of the second connecting piece 402 is provided with a first connector 5. In practical applications, the second connecting piece 402 can be bent according to the space layout requirements of the equipment to reduce space occupation.

[0050] It should be noted that the first connecting piece 401 and the second connecting piece 402 can be integrally formed. The size of the first connecting piece 401 should be adapted to the first side surface 1012, so as to achieve direct connection with the large surface of the battery cell 1, which can reduce internal resistance and ensure battery performance. The second connecting piece 402 is designed to facilitate connection with the main board 9 and to facilitate the rational arrangement of the components of the battery cell 1. The first connector 5 can achieve quick connection with the main board 9, which is convenient for maintenance. In addition, in some other embodiments, the second connecting piece 402 and the main board 9 can also be connected and fixed by welding, conductive adhesive bonding, or other methods.

[0051] Optionally, in some embodiments of this utility model, such as Figure 3 As shown, the battery also includes a second electrical connector 6. The battery protection plate 3 is disposed on the side of the first terminal 2. One end of the second electrical connector 6 is connected to the surface of the battery protection plate 3 facing away from the metal casing 101, and the other end is connected to the top of the first terminal 2 to conduct electricity between the battery protection plate 3 and the first terminal 2. Optionally, the second electrical connector 6 is a connecting nickel sheet, which is welded to both the battery protection plate 3 and the first terminal 2. This arrangement avoids wasting the overall battery space, improves space utilization, and, without changing the original size, helps to increase the capacity of the cell 1 and improve the battery's range.

[0052] Optionally, in some embodiments of this utility model, such as Figure 1 As shown, the battery also includes a third electrical connector 7, which is located on the side of the battery protection board 3 facing away from the metal casing 101. It should be noted that the battery protection board 3 is connected to the first terminal 2, and the third electrical connector 7 is connected to the battery protection board 3. Taking the first terminal 2 as the positive terminal as an example, the third electrical connector 7 leads out the positive terminal of the cell 1 as the VCC power supply terminal. Conversely, the third electrical connector 7 can be used as the GND terminal. This configuration facilitates connection to the main board 9 via the third electrical connector 7, forming a stable electrical connection path and ensuring the reliability of electrical transmission.

[0053] Optionally, in some embodiments of this utility model, the third electrical connector 7 is a flexible electrical connector. Specifically, the third electrical connector 7 is an FPC or an FDC, and is used to connect to the motherboard 9. Generally, the FDC only transmits VCC / GND, while the FPC can integrate I / O while transmitting VCC / GND. 2 The C-communication protocol or other communication protocols are used as the battery communication interface. This configuration, based on the bendable characteristics of the flexible electrical connector, allows for the formation of an obstacle-avoiding electrical connection path between the battery and the motherboard 9 (e.g., bypassing protruding structures such as camera modules and vibration motors), thereby optimizing the spatial path, improving the utilization of internal space, eliminating stress concentration caused by rigid connections, and improving the product's drop resistance. Furthermore, in some embodiments, such as... Figure 3 As shown, along the first direction, the third electrical connector 7 and the second connecting piece 402 are spaced apart. This layout is more reasonable, making the positive and negative leads of the battery cell 1 separate from each other, and making the connection with the main board 9 safer and more reliable.

[0054] Optionally, in some embodiments of this utility model, such as Figure 2 As shown, the third electrical connector 7 includes a third connecting piece 701 and a fourth connecting piece 702 bent and connected to the third connecting piece 701. The third connecting piece 701 is located on the side of the battery protection board 3 facing away from the metal housing 101, and the end of the fourth connecting piece 702 is provided with a second connector 8. It should be noted that the third connecting piece 701 and the fourth connecting piece 702 are integrally bent and formed. The third connecting piece 701 can be connected and fixed to the battery protection board 3 by welding, conductive adhesive bonding, etc. The fourth connecting piece 702 is connected to the main board 9 through the second connector 8, thereby realizing the electrical connection between the battery protection board 3 and the main board 9, and facilitating quick assembly and maintenance. In addition, in some other embodiments, the connection structure between the fourth connecting piece 702 and the main board 9 includes, but is not limited to, connector insertion, and can also be connected and fixed by direct welding, conductive adhesive bonding, etc.

[0055] According to an embodiment of the present invention, another aspect provides an electrical device comprising the battery as described in the various embodiments above. Optionally, the electrical device includes, but is not limited to, mobile communication devices, laptops, electric vehicles, electric bicycles, power tools, etc. The derivation process of this beneficial effect is largely similar to the derivation process of the beneficial effects of the battery described above, and therefore will not be repeated here.

[0056] Optionally, in some embodiments of this utility model, such as Figure 4 and Figure 5As shown, the electrical device also includes a motherboard 9. Taking a mobile phone as an example, the motherboard 9 is mainly used for transmitting mobile phone system and screen information. The motherboard 9 has a first connecting part 901 and a second connecting part 902. The protruding end 403 of the first electrical connector 4 is connected to the first connecting part 901, and the battery protection board 3 is connected to the second connecting part 902 through the third electrical connector 7. Specifically, the first electrical connector 4 has a first connector 5, and the third electrical connector 7 has a second connector 8, thereby connecting to the motherboard 9 through the connectors. It should be noted that the positive and negative terminals of the battery cell 1 are connected to the motherboard 9 through the first connector 5 and the second connector 8, respectively, so that the battery cell 1 and the mobile phone motherboard form a circuit to provide power to the mobile phone. Moreover, the positive and negative connectors are set separately, eliminating the need for complex connectors, reducing the battery manufacturing cost, avoiding the problem of short circuits caused by the positive and negative terminals of the connectors being located in the same position, and improving battery performance.

[0057] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery, characterized by, include: The battery cell (1) includes a metal casing (101) and a battery cell body disposed within the metal casing (101); The first terminal (2) is connected to the battery cell body and is disposed through the end face of the metal casing (101); The battery protection board (3) is connected to the first terminal post (2); The second terminal is opposite in polarity to the first terminal (2) and is connected between the cell body and the metal casing (101). The first electrical connector (4) is connected to the metal housing (101) and extends out of the metal housing (101).

2. The battery of claim 1, wherein, The first electrical connector (4) is a flexible electrical connector.

3. The battery of claim 2, wherein, The metal casing (101) includes a pair of opposing first side surfaces (1012) and a pair of opposing second side surfaces (1013), wherein the area of ​​the first side surface (1012) is larger than the area of ​​the second side surface (1013); The first electrical connector (4) extends along the first side (1012) and extends out of the metal housing (101).

4. The battery of claim 3, wherein, The first electrical connector (4) includes: The first connecting piece (401) is attached to the first side surface (1012); The second connecting piece (402) is connected to the first connecting piece (401). The second connecting piece (402) extends along the first side (1012) and extends out of the metal housing (101). The extended end (403) of the second connecting piece (402) is provided with a first connector (5).

5. The battery according to any one of claims 1 to 4, characterized in that, Also includes: The second electrical connector (6) is provided on the side of the first terminal post (2) and one end of the second electrical connector (6) is connected to the surface of the battery protection plate (3) away from the metal casing (101), and the other end is connected to the top of the first terminal post (2) to conduct electricity between the battery protection plate (3) and the first terminal post (2).

6. The battery of any one of claims 1 to 4, wherein, Also includes: The third electrical connector (7) is disposed on the side of the battery protection plate (3) away from the metal casing (101).

7. The battery of claim 6, wherein, The third electrical connector (7) is a flexible electrical connector.

8. The battery of claim 7, wherein, The third electrical connector (7) includes: The third connecting piece (701) is disposed on the side of the battery protection plate (3) away from the metal casing (101); The fourth connecting piece (702) is bent and connected to the third connecting piece (701), and the end of the fourth connecting piece (702) is provided with a second connector (8).

9. An electrical device, characterized by Includes the battery as described in any one of claims 1 to 8.

10. The powered device of claim 9, wherein, Also includes: The motherboard (9) is provided with a first connecting part (901) and a second connecting part (902). The protruding end (403) of the first electrical connector (4) is connected to the first connecting part (901). The battery protection board (3) is connected to the second connecting part (902) through a third electrical connector (7).

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