Battery

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a battery. Comprising a battery cell, a protection plate assembly and a connector, the battery cell comprises a shell, the shell is a negative electrode of the battery cell, a positive pole is arranged on one side of the shell, and an insulating part is arranged between the positive pole and the shell; the protection plate assembly comprises a flexible circuit board, foam and a protection plate, the flexible circuit board is connected with a positive plate and a negative plate, one end of the positive plate is electrically connected with the positive column, one end of the negative plate is electrically connected with the shell, and the foam is located between the shell and the flexible circuit board; one ends of the positive plate and the negative plate, which are respectively connected with the flexible circuit board, are isolated from the shell; the connector is arranged on the flexible circuit board and is used for being connected with an external host; the protection board is a positive electrode protection circuit board. The problems that in the prior art, a negative electrode of a battery is large in size and prone to short circuit, and negative electrode protection is prone to failure are solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, and in particular to a battery. Background Technology

[0002] Currently, with the increasing development of new energy vehicles and electronic products, the corresponding driving power supplies are also developing towards higher capacity, higher safety, and lighter weight. Lithium batteries, with their high capacity and other excellent characteristics, are widely used in electronic products.

[0003] Lithium batteries are prone to short circuits, overcurrent, or over-discharge during use due to factors such as charger malfunctions and overcharging. Therefore, protective devices need to be installed on the batteries to prevent explosions or fires.

[0004] Lithium-ion batteries typically use a negative electrode protection circuit board for protection and monitoring. However, in some cases where the negative electrode post is large or the battery casing is entirely negative, using a common negative electrode protection circuit board can easily cause the protection to fail. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is to provide a battery to solve the problems in the prior art where the negative electrode is too large and easily short-circuited, and the negative electrode protection is prone to failure.

[0006] This utility model discloses a battery, comprising: a battery cell, a protection board assembly, and a connector. The battery cell includes a casing, which serves as the negative electrode of the battery cell. A positive electrode post is provided on one side of the casing, and an insulating component is provided between the positive electrode post and the casing. The protection board assembly includes a flexible circuit board, foam, and a protection board. A positive electrode plate and a negative electrode plate are connected to the flexible circuit board. One end of the positive electrode plate is electrically connected to the positive electrode post, and one end of the negative electrode plate is electrically connected to the casing. The foam is located between the casing and the flexible circuit board, and is used to isolate the contact between the ends of the positive and negative electrode plates connected to the flexible circuit board and the casing. The connector is disposed on the flexible circuit board and is used to connect to an external host. The protection board is a positive electrode protection circuit board.

[0007] Optionally, the battery further includes a first insulating tape and a second insulating tape. The first insulating tape is pasted on the end of the negative electrode sheet connected to the outer casing to provide insulation and protection for the negative electrode sheet. The second insulating tape is pasted on the end of the positive electrode sheet connected to the positive terminal to provide insulation and protection for the positive electrode sheet.

[0008] Optionally, the flexible circuit board includes a connecting portion, an extension portion, and a mounting portion connected in sequence. The connecting portion is connected to the positive electrode and the negative electrode. The mounting portion and the extension portion form an "L" shape. The protective plate is disposed on the side of the connecting portion away from the foam. The connector is disposed on the mounting portion.

[0009] Optionally, the width of the connecting portion is greater than the width of the extension portion, a reinforcing plate is provided on the mounting portion, and the connector and the reinforcing plate are respectively located on opposite sides of the mounting portion.

[0010] Optionally, the negative electrode includes a first contact segment and a second contact segment connected to each other, with a certain bending angle between the first contact segment and the second contact segment, the foam is insulating between the first contact segment and the outer shell, the second contact segment is connected to the outer shell, and the first insulating tape is attached to the second contact segment.

[0011] Optionally, the second insulating tape is sequentially applied to the protective plate, the positive electrode sheet, and the outer casing.

[0012] Optionally, the second insulating tape includes a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence. The first connecting segment is attached to the protective plate, the second connecting segment is attached to the positive electrode sheet, and the third connecting segment is attached to the outer casing.

[0013] Optionally, the outer casing includes a base plate and a housing that interlock, wherein the outer contour of the base plate is greater than or equal to the outer contour area of ​​the housing.

[0014] Optionally, the base plate is provided with at least one explosion-proof groove.

[0015] Optionally, both the positive electrode and the negative electrode are nickel plates.

[0016] Compared with existing technologies, the beneficial effects of the battery provided in this utility model embodiment are as follows: the battery cell serves as the main body of the entire battery, its outer casing acts as the negative electrode of the entire battery cell, and the positive electrode post of the battery cell is provided on one side of the outer casing. A positive electrode protection circuit board is used to mitigate risks. The flexible circuit board in the protection board assembly has a positive electrode plate and a negative electrode plate. The positive electrode plate is used to connect to the positive electrode post of the battery cell, and the negative electrode plate is used to connect to the outer casing. Foam is provided on the side of the flexible circuit board facing the outer casing to isolate the ends of the positive electrode plate and the negative electrode plate connected to the flexible circuit board, respectively, preventing short circuits between the positive and negative electrode plates. A connector is provided on the flexible circuit board for connection to an external host, facilitating the host's monitoring and control of the battery's condition. The protection board on the flexible circuit board controls power cut-off in case of unexpected battery conditions and monitors the battery's condition, thereby protecting the positive electrode of the battery and improving battery safety during actual use. Attached Figure Description

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of one of the battery embodiments provided in this utility model;

[0019] Figure 2 This is a second schematic diagram of the battery provided in this embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the flexible circuit board provided in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the outer casing provided in an embodiment of the present utility model.

[0022] The labels for the attached figures are as follows:

[0023] 1000, Battery; 100, Cell; 101, Casing; 1011, Shell; 1012, Base Plate; 10121, Explosion-proof Groove; 102, Positive Terminal Post; 103, Insulating Component; 200, Protection Board Assembly; 201, Flexible Circuit Board; 2011, Connecting Part; 2012, Extension Part; 2013, Mounting Part; 20131, Reinforcing Plate; 202, Positive Electrode; 203, Negative Electrode; 2031, First Contact Section; 2032, Second Contact Section; 204, Foam; 205, Protection Board; 300, First Insulating Tape; 400, Second Insulating Tape; 401, First Connecting Section; 402, Second Connecting Section; 403, Third Connecting Section; 500, Connector. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] This utility model embodiment provides a battery 1000, such as Figure 1-3 As shown, the assembly includes: a battery cell 100, a protection board assembly 200, and a connector 500. The battery cell 100 includes a housing 101, which is the negative electrode of the battery cell 100. A positive electrode post 102 is provided on one side of the housing 101, and an insulating member 103 is provided between the positive electrode post 102 and the housing 101. The protection board assembly 200 includes a flexible circuit board 201, foam 204, and a protection board 205. A positive electrode plate 202 and a negative electrode plate 203 are connected to the flexible circuit board 201. One end of electrode 202 is electrically connected to positive electrode post 102, and one end of negative electrode 203 is electrically connected to housing 101. Foam 204 is located between housing 101 and flexible circuit board 201 to isolate the contact between the ends of positive electrode 202 and negative electrode 203 connected to flexible circuit board 201 and housing 101. Connector 500 is provided on flexible circuit board 201 and is used to connect to external host. Protection board 205 is positive electrode protection circuit board.

[0026] The battery cell 100 serves as the main body of the entire battery 1000. Its outer casing 101 acts as the negative electrode of the entire battery cell 100, and the positive electrode post 102 of the battery cell 100 is provided on one side of the outer casing 101. A positive electrode protection circuit board is used to avoid risks. In the protection board assembly 200, the flexible circuit board 201 is provided with a positive electrode plate 202 and a negative electrode plate 203. The positive electrode plate 202 is used to connect to the positive electrode post 102 of the battery cell 100, and the negative electrode plate 203 is used to connect to the outer casing 101. At the same time, foam 204 is provided on the side of the flexible circuit board 201 facing through the outer casing 101, so that the end of the positive electrode plate 202 connected to the flexible circuit board 201 and the end of the negative electrode plate 203 connected to the flexible circuit board 201 are respectively isolated by the foam 204, avoiding short circuits and other problems between the positive electrode plate 202 and the negative electrode plate 203. Connector 500 is mounted on flexible circuit board 201 for connection to an external host, facilitating the host's monitoring and control of the battery 1000's status. Flexible circuit board 201 includes a protection board 205 for controlling power cut-off in case of unexpected events with the battery 1000 and for monitoring the battery 1000's status, thus protecting the positive terminal of the battery 1000 and improving its safety during actual use.

[0027] It is easy to understand that the function of the flexible circuit board 201 is to connect the protection board 205, the negative electrode 203 and the positive electrode 202, so that the protection board 205 on the flexible circuit board 201 can directly monitor and control the cell 100 through the positive electrode post 102. For example, it can cut off the current in case of overcharging, short circuit or over-discharging, or detect the current in the cell 100, thereby realizing the positive protection of the battery 1000.

[0028] Specifically, the outer casing 101 serves as the negative electrode, and an insulating element 103 is provided between the positive electrode post 102 and the outer casing 101 to help prevent safety issues such as short circuits.

[0029] The protection board assembly 200 helps improve the protection performance of the battery 1000. The foam 204 can prevent the flexible circuit board 201 from directly contacting the cell 100, thus avoiding short circuits and damage to the flexible circuit board 201 and the protection board 205. The connection between the negative electrode 203 and the outer casing 101 and the connection between the positive electrode 202 and the positive terminal 102 also help protect the cell 100.

[0030] It should be noted that although the flexible circuit board 201 connects both the positive electrode 202 and the negative electrode 203, mainly to facilitate the protection board assembly 200 in monitoring the overall voltage of the cell 100, the design and layout of the circuit within the flexible circuit board 201 ensures that the positive electrode 202 and the negative electrode 203 do not directly form an electrical connection. This avoids the problem of short circuits caused by contact between the positive electrode 202 and the negative electrode 203.

[0031] refer to Figure 1 and Figure 2 The battery 1000 also includes a first insulating tape 300 and a second insulating tape 400. The first insulating tape 300 is pasted on the end of the negative electrode 203 connected to the outer casing 101 to insulate and protect the negative electrode 203. The second insulating tape 400 is pasted on the end of the positive electrode 202 connected to the positive electrode post 102 to insulate and protect the positive electrode 202.

[0032] The first insulating tape 300 is adhered to the end of the negative electrode 203 that connects to the outer casing 101, providing insulation protection at the connection point. Similarly, the second insulating tape 400 is adhered to the end of the positive electrode 202 that connects to the positive terminal 102, ensuring insulation at the connection point between the positive terminal 102 and the positive electrode 202. The first insulating tape 300 and the second insulating tape 400 further improve the insulation performance of the battery 1000, helping to reduce the possibility of short circuits and thus improving the safety of the battery 1000.

[0033] The first insulating tape 300 and the second insulating tape 400 can each form an insulating protective layer to prevent the protected area from direct contact with the external environment or other metal parts, thereby avoiding short circuits or interference from external moisture, dust and other safety problems.

[0034] refer to Figure 1 and Figure 3 The flexible circuit board 201 includes a connecting part 2011, an extension part 2012 and a mounting part 2013 connected in sequence. The connecting part 2011 is connected to the positive electrode 202 and the negative electrode 203. The mounting part 2013 and the extension part 2012 form an "L" shape. The protective plate 205 is located on the side of the connecting part 2011 away from the foam 204. The connector 500 is located on the mounting part 2013.

[0035] Specifically, the "L"-shaped structure formed between the mounting portion 2013 and the extension portion 2012 increases the structural strength of the flexible circuit board 201. This structural design helps reduce the impact of vibration and external shocks on the flexible circuit board 201, extending the service life of the battery 1000.

[0036] The protective plate 205 is located on the side of the connecting part 2011 away from the foam 204, which can make the flexible circuit board 201 have a better support effect on the protective plate 205 due to the support of the foam 204, so as to ensure that the protective plate 205 and the flexible circuit board 201 remain stable during actual use.

[0037] refer to Figure 3 The width of the connecting part 2011 is greater than the width of the extension part 2012. The mounting part 2013 is provided with a reinforcing plate 20131. The connector 500 and the reinforcing plate 20131 are located on opposite sides of the mounting part 2013.

[0038] The width of the connecting portion 2011 of the flexible circuit board 201 is greater than the width of the extension portion 2012, which provides a larger contact area between one side of the flexible circuit board 201 and the foam 204, the positive electrode 202, and the negative electrode 203, thereby increasing the stability between the connecting portion 2011 and the foam 204, the positive electrode 202, and the negative electrode 203. This helps ensure the robustness of the connection between the protection board assembly 200 and the chip assembly, reducing the risk of loosening or breakage.

[0039] On the other hand, a protective plate 205 is provided on the side of the flexible circuit board 201 away from the foam 204. The protective plate 205 is provided on the connecting part 2011, so the wider connecting part 2011 can improve the load-bearing capacity of the connecting part 2011 on the protective plate 205.

[0040] The mounting section 2013 is equipped with a reinforcing plate 20131, which is located on opposite sides of the connector 500. The reinforcing plate 20131 enhances the load-bearing capacity of the flexible circuit board 201 on the connector 500. The reinforcing plate 20131 provides additional support and stability to the connector 500, preventing damage to both the flexible circuit board 201 and the connector 500 during use.

[0041] refer to Figure 2 The negative electrode 203 includes a first contact segment 2031 and a second contact segment 2032 that are connected to each other. The first contact segment 2031 and the second contact segment 2032 have a certain bending angle. Foam 204 is isolated between the first contact segment 2031 and the outer shell 101. The second connecting segment 402 is connected to the outer shell 101. The first insulating tape 300 is attached to the second connecting segment 402.

[0042] The bending angle between the first contact segment 2031 and the second contact segment 2032 allows one end of the negative electrode 203 to connect to the outer casing 101. Simultaneously, the bending angle also allows the first contact segment 2031 to be isolated from the outer casing 101 by the foam 204. Furthermore, the foam 204 elevates the negative electrode 203 and the positive electrode 202 to a certain height, ensuring that the positive electrode post 102 is on the same plane, thus facilitating the installation and connection of other components. On the other hand, the first contact segment 2031 being located on one side of the foam 204 and the second contact segment 2032 being connected to one side of the outer casing 101 helps to evenly distribute the connection load of the negative electrode 203, reducing the risk of excessive pressure on a single connection point.

[0043] The first insulating tape 300 is applied to the second contact section 2032, which can improve the insulation performance of the end of the negative electrode 203 connected to the outer casing 101. This helps to prevent short circuits and other safety problems, and enhances the safety of the battery 1000.

[0044] refer to Figure 1 and Figure 2 The protection plate 205 is located on the side of the connecting part 2011 away from the outer shell 101, and the second insulating tape 400 is sequentially attached to the protection plate 205, the positive electrode plate 202 and the outer shell 101.

[0045] In this embodiment, the protection board 205 is used to feed back battery information to the host connected to the battery 1000, facilitate the host to control the battery through the protection board 205, and provide voltage protection for the battery 1000 during charging and power generation. Placing the protection board 205 on the side of the connection part 2011 away from the outer casing 101 can effectively protect the protection board 205 from direct contact with the outer casing 101 of the cell 100, that is, from direct contact with the negative terminal of the cell 100. This avoids the negative terminal of the cell 100 from affecting and damaging the protection board 205, and avoids unexpected situations such as short circuits between the protection board 205 and the cell 100. This helps to ensure the stable operation of the protection board 205 and extend its lifespan.

[0046] Specifically, by sequentially attaching a second insulating tape 400 between the protection plate, the positive electrode 202, and the outer casing 101, the structural stability of the battery 1000 can be enhanced, the movement or friction between the aforementioned components can be reduced, and the components can maintain a stable connection. At the same time, using insulating tape helps prevent short circuits in the battery 1000's circuitry, improving the overall safety of the battery 1000.

[0047] refer to Figure 1 The second insulating tape 400 includes a first connecting segment 401, a second connecting segment 402 and a third connecting segment 403 connected in sequence. The first connecting segment 401 is attached to the protective plate 205, the second connecting segment 402 is attached to the positive electrode plate 202, and the third connecting segment 403 is attached to the outer shell 101.

[0048] The first connecting segment 401 of the second insulating tape 400 is attached to the protective plate 205, the second connecting segment 402 is attached to the positive electrode plate 202, and the third connecting segment 403 is attached to the outer casing 101. In other words, the second insulating tape 400 together adheres and fixes the protective plate 205, the positive electrode plate 202, and the outer casing 101. This improves the tightness of the connection between the protective plate assembly 200 and the casing 1011, enhances the firmness of the connection between the protective plate assembly 200 and the battery cell 100, and prevents the protective plate assembly 200 from detaching from the battery cell 100 during use. This arrangement also ensures the connection stability between the positive electrode plate 202 and the positive electrode post 102 of the battery cell 100, guaranteeing that the positive electrode protection of the battery cell 100 by the protective plate assembly 200 can be effectively achieved.

[0049] Specifically, the multi-segment connection design of the second insulating tape 400 can increase the structural stability between the cell 100, the protection board assembly 200, and the chip assembly. By sequentially attaching the second insulating tape 400 to the protection board 205, the positive electrode 202, and the casing 1011, protection is provided for the aforementioned components, thereby improving the stability of the battery 1000.

[0050] It is easy to understand that this method of connecting the components by sequentially pasting a second insulating tape 400 simplifies the production process and improves production efficiency.

[0051] refer to Figure 4 The outer shell 101 includes a base plate 1012 and a shell 1011 that are interlocked. The outer contour of the base plate 1012 is greater than or equal to the outer contour area of ​​the shell 1011.

[0052] The outer casing 101 includes a base plate 1012 and a housing 1011 that are interlocked. The outer contour of the base plate 1012 is greater than or equal to the outer contour area of ​​the housing 1011. This allows the edge of the base plate 1012 to be aligned with or partially extend beyond the edge of the housing 1011 after the base plate 1012 is interlocked with the housing 1011. This improves the structural stability of the outer casing 101 and enhances the load-bearing capacity of the base plate 1012, enabling the battery 1000 to maintain better stability and robustness when placed inside the required equipment.

[0053] Specifically, the base plate 1012 serves as a support part of the outer casing 101. Its larger outer contour can provide better support and stability, enabling the battery 1000 to maintain good stability during actual use and helping to prevent the battery 1000 from shaking or slipping.

[0054] refer to Figure 4 At least one explosion-proof groove 10121 is provided on the base plate 1012.

[0055] At least one explosion-proof groove 10121 is provided on the base plate 1012. The explosion-proof groove 10121 can help release the internal pressure of the cell 100 and reduce the potential risk of explosion. In the battery 1000, if an abnormal situation causes the internal pressure to rise, the explosion-proof groove 10121 can provide a release channel. When the pressure rises to the peak design pressure that the cell 100 can withstand, the outer casing 101 of the cell 100 is actively destroyed, reducing the possibility of cell 100 explosion and thus enhancing the safety of the battery 1000.

[0056] Specifically, when cell 100 requires pressure release, the explosion-proof groove 10121 can limit the scope of damage, preventing the entire device from completely breaking or being damaged. By controlling the release channel, the degree of damage to surrounding components can be reduced, contributing to the integrity of other parts of battery 1000.

[0057] The explosion-proof groove 10121 is designed to reduce the risk of fire. In the event of an internal malfunction, the explosion-proof groove 10121 can effectively release pressure and heat, reducing the possibility of fire and improving the safety of the battery 1000.

[0058] It is easy to understand that the explosion-proof groove 10121 can protect the device from severe damage in critical moments, thereby improving the reliability of the battery 1000. This design can reduce the impact of unexpected events on the overall performance and function of the device, extending the device's lifespan.

[0059] In an optional embodiment of this utility model, both the positive electrode 202 and the negative electrode 203 are nickel sheets.

[0060] In this embodiment, both the positive electrode 202 and the negative electrode 203 are made of nickel. Nickel is a good conductor of electricity, so using nickel for both the positive electrode 202 and the negative electrode 203 ensures good electrical conductivity. This helps reduce resistance and improves the performance and efficiency of the battery 1000.

[0061] Specifically, nickel has excellent corrosion resistance, resisting oxidation and corrosion. Therefore, using nickel sheets for the positive electrode 202 and negative electrode 203 can extend the service life of the battery 1000. Nickel sheets also have high mechanical strength, providing good support and stability. Using nickel sheets for the positive electrode 202 and negative electrode 203 can enhance the structural strength of the battery 1000, reducing the risk of deformation and damage.

[0062] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A battery, characterized in that, include: A battery cell, comprising a casing, the casing being the negative electrode of the battery cell, a positive electrode post being provided on one side of the casing, and an insulating component being provided between the positive electrode post and the casing; A protection board assembly includes a flexible circuit board, foam, and a protection board. A positive electrode and a negative electrode are connected to the flexible circuit board. One end of the positive electrode is electrically connected to a positive terminal, and one end of the negative electrode is electrically connected to the outer shell. The foam is located between the outer shell and the flexible circuit board to isolate the contact between the ends of the positive and negative electrodes connected to the flexible circuit board and the outer shell. A connector, which is disposed on the flexible circuit board, is used to connect to an external host. The protection board is a positive protection circuit board.

2. The battery according to claim 1, characterized in that, The battery also includes a first insulating tape and a second insulating tape. The first insulating tape is pasted on the end of the negative electrode sheet that is connected to the outer casing to insulate and protect the negative electrode sheet. The second insulating tape is pasted on the end of the positive electrode sheet that is connected to the positive electrode post to insulate and protect the positive electrode sheet.

3. The battery according to claim 1, characterized in that, The flexible circuit board includes a connecting part, an extension part, and a mounting part connected in sequence. The connecting part is connected to the positive electrode and the negative electrode. The mounting part and the extension part form an "L" shape. The protective plate is located on the side of the connecting part away from the foam. The connector is located on the mounting part.

4. The battery according to claim 3, characterized in that, The width of the connecting part is greater than the width of the extension part, and a reinforcing plate is provided on the mounting part. The connector and the reinforcing plate are located on opposite sides of the mounting part.

5. The battery according to claim 2, characterized in that, The negative electrode sheet includes a first contact section and a second contact section that are connected to each other. The first contact section and the second contact section have a certain bending angle. The foam is used to isolate the first contact section from the outer shell. The second contact section is connected to the outer shell. The first insulating tape is attached to the second contact section.

6. The battery according to claim 2, characterized in that, The second insulating tape is sequentially applied to the protective plate, the positive electrode plate, and the outer casing.

7. The battery according to claim 6, characterized in that, The second insulating tape includes a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence. The first connecting segment is attached to the protective plate, the second connecting segment is attached to the positive electrode plate, and the third connecting segment is attached to the outer casing.

8. The battery according to claim 1, characterized in that, The outer casing includes a base plate and a shell that interlock, wherein the outer contour of the base plate is greater than or equal to the outer contour area of ​​the shell.

9. The battery according to claim 8, characterized in that, The base plate is provided with at least one explosion-proof groove.

10. The battery according to any one of claims 1-9, characterized in that, Both the positive electrode and the negative electrode are nickel sheets.

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