Battery protection plate, battery and electronic device

Abstract

This utility model discloses a battery protection board, a battery, and an electronic device. The disclosed battery protection board is used for electrical connection with the main body of the electronic device. The main body has positive and negative interfaces spaced apart. The battery protection board includes a protection board body, a first output circuit board, and a second output circuit board. The protection board body has a positive output portion and a negative output portion spaced apart. A first end of the first output circuit board is electrically connected to the positive output portion, and a first end of the second output circuit board is electrically connected to the negative output portion. A second end of the first output circuit board is used for electrical connection to the positive interface, and a second end of the second output circuit board is used for electrical connection to the negative interface. The above solution can solve the problem of high battery temperature in related technologies.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery protection board, a battery, and an electronic device. Background Technology

[0002] A battery protection board is primarily used to monitor and protect the battery's operating status, preventing problems such as overcharging, over-discharging, short circuits, and abnormal temperatures. It integrates multiple sensors and control circuits to monitor battery voltage, current, and temperature in real time, and performs corresponding protective actions based on preset safety thresholds.

[0003] In related technologies, the battery supplies power to the main body of the electronic device through the output circuit board of the battery protection board. The positive and negative lines of the battery protection board are integrated on the same output circuit board. As battery technology develops towards higher power and faster charging speeds, the current carried by the battery protection board is also increasing (for example, the maximum continuous current carried by the battery protection board is greater than 10A). Since the output circuit board integrates both positive and negative lines, the temperature of the output circuit board will increase, which can easily lead to a higher overall battery temperature. This can result in a decrease in battery performance and a risk of battery combustion. Utility Model Content

[0004] This utility model discloses a battery protection board, a battery, and an electronic device to solve the problem of high battery temperature in related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] In a first aspect, this application discloses a battery protection board. The disclosed battery protection board is used for electrical connection with the main body of an electronic device. The main body of the device has a positive terminal interface and a negative terminal interface spaced apart. The battery protection board includes a protection board body, a first output circuit board, and a second output circuit board. The protection board body has a positive terminal output portion and a negative terminal output portion spaced apart. A first end of the first output circuit board is electrically connected to the positive terminal output portion, and a first end of the second output circuit board is electrically connected to the negative terminal output portion. A second end of the first output circuit board is used for electrical connection with the positive terminal interface, and a second end of the second output circuit board is used for electrical connection with the negative terminal interface.

[0007] Secondly, this application also discloses a battery, which includes a battery cell and a battery protection board as described in the first aspect. The battery cell is provided with tabs, and the tabs are electrically connected to the battery protection board.

[0008] Thirdly, this application also discloses an electronic device, which includes a device body and the battery described in the second aspect. The device body has a positive terminal interface and a negative terminal interface spaced apart. The second end of the first output circuit board is electrically connected to the positive terminal interface, and the second end of the second output circuit board is electrically connected to the negative terminal interface.

[0009] The technical solution adopted in this utility model can achieve the following technical effects:

[0010] This embodiment of the application configures the battery protection board as a structure including a protection board body, a first output circuit board, and a second output circuit board. The first end of the first output circuit board is electrically connected to the positive output portion of the protection board body, and the first end of the second output circuit board is electrically connected to the negative output portion of the protection board body. This allows the lines electrically connected to the positive and negative output portions to be distributed on different output circuit boards. Because the lines electrically connected to the positive and negative output portions are distributed on different output circuit boards, compared to related technologies that integrate the positive and negative lines onto the same output circuit board, heat concentration is avoided, the heat dissipation area is increased, and thus the heat dissipation of the battery protection board is improved, thereby helping to reduce the battery temperature. Attached Figure Description

[0011] Figure 1 This is an overall schematic diagram of the battery protection board disclosed in the embodiments of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the battery protection board disclosed in an embodiment of the present utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the first output circuit board disclosed in an embodiment of the present utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the second output circuit board disclosed in an embodiment of the present utility model;

[0015] Figure 5 This is a schematic diagram of the battery structure disclosed in an embodiment of the present utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100 - Protection board body, 101 - Power pad, 102 - Signal pad, 110 - Positive output section, 120 - Negative output section, 130 - Positive electrical connection section, 140 - Negative electrical connection section.

[0018] 200-First Output Circuit Board

[0019] 300-Second Output Circuit Board

[0020] 410 - Power lines, 420 - Signal lines

[0021] 500 - battery cell, 600 - connector. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The technical solutions disclosed in the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0024] Please refer to Figures 1 to 5 This utility model discloses a battery protection board, which is used for electrical connection with the main body of an electronic device, such as a mobile phone, tablet, or computer. This application does not specifically limit the type of electronic device. The main body of the device has positive and negative interfaces spaced apart.

[0025] The disclosed battery protection board includes a protection board body 100, a first output circuit board 200, and a second output circuit board 300. The protection board body 100 is the main part of the battery protection board and can be installed in the battery cell 500. The first output circuit board 200 is used to electrically connect to the positive terminal interface of the device body, and the second output circuit board 300 is used to electrically connect to the negative terminal interface of the device body, thereby realizing the power supply to the device body.

[0026] The protection board body 100 has a positive output section 110 and a negative output section 120 arranged at intervals. The positive output section 110 is electrically connected to the positive terminal of the battery cell 500, and the negative output section 120 is electrically connected to the negative terminal of the battery cell 500. The first end of the first output circuit board 200 is electrically connected to the positive output section 110, and the first end of the second output circuit board 300 is electrically connected to the negative output section 120. The first output circuit board 200 and the second output circuit board 300 are arranged at intervals.

[0027] It should be noted that both the first output circuit board 200 and the second output circuit board 300 are equipped with power lines (power lines are used to supply power to the main body of the device or to charge the battery). After the first end of the first output circuit board 200 is electrically connected to the positive output section 110, the power lines on the first output circuit board 200 are positive lines. After the first end of the second output circuit board 300 is electrically connected to the negative output section 120, the power lines on the second output circuit board 300 are negative lines.

[0028] The second end of the first output circuit board 200 is used to be electrically connected to the positive terminal interface, and the second end of the second output circuit board 300 is used to be electrically connected to the negative terminal interface.

[0029] When the battery supplies power to the main body of the device, the current output from the battery cell 500 flows sequentially through the positive output section 110, the first output circuit board 200, the main body of the device, the second output circuit board 300, and the negative output section 120 back to the battery cell 500, thus supplying power to the main body of the device. When charging the battery, the external charging current enters the battery cell 500 from the negative output section 120, thereby charging the battery.

[0030] This embodiment of the application configures the battery protection board as including a protection board body 100, a first output circuit board 200, and a second output circuit board 300. The first end of the first output circuit board 200 is electrically connected to the positive output portion 110 of the protection board body 100, and the first end of the second output circuit board 300 is electrically connected to the negative output portion 120 of the protection board body 100. This allows the lines electrically connected to the positive output portion 110 and the lines electrically connected to the negative output portion 120 to be distributed on different output circuit boards. Because the lines electrically connected to the positive output portion 110 and the lines electrically connected to the negative output portion 120 are distributed on different output circuit boards, compared to related technologies that integrate the positive and negative lines onto the same output circuit board, heat concentration is avoided, the heat dissipation area is increased, which is beneficial for the heat dissipation of the battery protection board and thus helps to reduce the battery temperature.

[0031] Optionally, the protection board body 100 can be a rigid circuit board, and the first output circuit board 200 and the second output circuit board 300 can both be flexible circuit boards.

[0032] The battery protection board disclosed in this application provides a rigid circuit board body 100, which enhances its strength and improves the stability of components mounted on the body 100, as well as facilitating connection with the battery cell 500. Furthermore, by configuring the first output circuit board 200 and the second output circuit board 300 as flexible circuit boards, the second ends of both boards possess adjustable positioning capabilities, allowing the battery to be adapted to various electronic devices.

[0033] Of course, the protection board body 100, the first output circuit board 200 and the second output circuit board 300 can all be rigid circuit boards or flexible circuit boards. This application embodiment does not impose specific restrictions on the types of the protection board body 100, the first output circuit board 200 and the second output circuit board 300.

[0034] Specifically, both the positive output section 110 and the negative output section 120 may include power pads 101, and both the first output circuit board 200 and the second output circuit board 300 may include power lines 410. The power lines 410 of the first output circuit board 200 are electrically connected to the power pads 101 of the positive output section 110, and the power lines 410 of the second output circuit board 300 are electrically connected to the power pads 101 of the negative output section 120.

[0035] Furthermore, both the positive output section 110 and the negative output section 120 may include a plurality of spaced power pads 101, and both the first output circuit board 200 and the second output circuit board 300 may include a plurality of spaced power lines 410. The plurality of power lines 410 of the first output circuit board 200 may be electrically connected one-to-one with the plurality of power pads 101 of the positive output section 110, and the plurality of power lines 410 of the second output circuit board 300 may be electrically connected one-to-one with the plurality of power pads 101 of the negative output section 120.

[0036] The battery protection board disclosed in this application configures both the first output circuit board 200 and the second output circuit board 300 to include multiple spaced power lines 410. This allows the first output circuit board 200 and the second output circuit board 300 to be powered by the multiple power lines 410 when the battery is supplying power to the main body of the device. This avoids the occurrence of local temperature concentration in the first output circuit board 200 and the second output circuit board 300, and also increases the heat dissipation area of ​​the power lines 410, which is beneficial to the heat dissipation of the battery protection board and thus helps to reduce the temperature of the battery.

[0037] The battery protection board needs to monitor whether the battery is overcharged, over-discharged, or short-circuited, as well as the battery temperature, and feed this information back to the main unit of the device. To achieve this monitoring, the positive output section 110 may optionally include a signal pad 102, and the first output circuit board 200 may also include a signal line 420, which is electrically connected to the signal pad 102 of the positive output section 110. Similarly, the negative output section 120 may also include a signal pad 102, and the second output circuit board 300 may also include a signal line 420, which is electrically connected to the signal pad 102 of the negative output section 120.

[0038] The battery protection board disclosed in this application provides a signal line 420 on the first output circuit board 200 and a signal line 420 on the second output circuit board 300. This allows the battery protection board to monitor overcharge, over-discharge, short circuit, and other conditions of the battery, as well as the battery temperature, through the signal line 420.

[0039] To reduce interference to signal lines 420, optionally, the signal lines 420 of the first output circuit board 200 can be distributed among multiple power lines 410 of the first output circuit board 200. The signal lines 420 of the second output circuit board 300 can be distributed among multiple power lines 410 of the second output circuit board 300.

[0040] The battery protection board disclosed in this application distributes the signal lines 420 of the first output circuit board 200 among the multiple power lines 410 of the first output circuit board 200, and distributes the signal lines 420 of the second output circuit board 300 among the multiple power lines 410 of the second output circuit board 300. This allows the power lines 410 to provide a certain degree of shielding on the outside of the signal lines 420, thereby reducing interference from external signals (such as signals generated by the motherboard of electronic devices, antennas, etc.) to the signal lines 420.

[0041] Specifically, the positive output section 110 may include multiple signal pads 102, and the first output circuit board 200 may include multiple signal lines 420, which can be electrically connected to the multiple signal pads 102 of the positive output section 110 in a one-to-one correspondence. The negative output section 120 may include multiple signal pads 102, and the second output circuit board 300 may include multiple signal lines 420, which can be electrically connected to the multiple signal pads 102 of the negative output section 120 in a one-to-one correspondence. The spacing between the multiple signal pads 102 of the positive output section 110 may be between 0.6mm and 0.8mm, and the width of the signal pads 102 may be between 1.2mm and 2.7mm. The spacing between the multiple signal pads 102 of the negative output section 120 may be between 0.6mm and 0.8mm, and the width of the signal pads 102 may be between 1.2mm and 2.7mm. It should be noted that the numerical ranges described in the embodiments of this application all include end values.

[0042] Optionally, given a fixed total number of signal lines 420 on the battery protection board, if the total number of signal lines 420 is even, then the number of signal lines 420 distributed on the first output circuit board 200 and the second output circuit board 300 can each be half the total number of signal lines 420. If the total number of signal lines 420 is odd, then the number of signal lines 420 distributed on the first output circuit board 200 can be one more than the number of signal lines 420 distributed on the second output circuit board 300, or the number of signal lines 420 distributed on the first output circuit board 200 can be one less than the number of signal lines 420 distributed on the second output circuit board 300. By adopting the above distribution method for the signal lines 420, the distribution of the signal lines 420 can be dispersed, thereby reducing signal interference between the signal lines 420.

[0043] Of course, the arrangement of signal lines 420 on the first output circuit board 200 and the second output circuit board 300 can be in other ways, and this application embodiment does not impose specific limitations on this.

[0044] Optionally, the area of ​​the power pad 101 can be larger than the area of ​​the signal pad 102.

[0045] Since the power pad 101 needs to carry a larger current, a larger pad area can provide better current carrying capacity, reduce resistance and heat generation, thereby improving the stability and reliability of the circuit. In addition, a larger pad area helps to dissipate heat better and reduce the temperature of the battery protection board.

[0046] To facilitate electrical connection between the second end of the first output circuit board 200 and the positive interface of the device body, and to facilitate electrical connection between the second end of the second output circuit board 300 and the negative interface of the device body, optionally, the second ends of the first output circuit board 200 and the second ends of the second output circuit board 300 may each be provided with a connector 600. The connector 600 of the first output circuit board 200 can be used for electrical connection to the positive interface, and the connector 600 of the second output circuit board 300 can be used for electrical connection to the negative interface. This makes it easier to connect the second ends of the first output circuit board 200 and the second ends of the second output circuit board 300 to the device body via the connector 600.

[0047] This application also discloses a battery, which includes a battery cell 500 and a battery protection board disclosed in the above embodiments. The battery cell is provided with tabs, which are electrically connected to the battery protection board.

[0048] The battery disclosed in this application embodiment, by setting the battery protection board disclosed in the above embodiment, makes the first end of the first output circuit board 200 electrically connected to the positive output portion 110 of the protection board body 100, and the first end of the second output circuit board 300 electrically connected to the negative output portion 120 of the protection board body 100, so that the lines electrically connected to the positive output portion 110 and the lines electrically connected to the negative output portion 120 are respectively distributed on different output circuit boards. Since the lines electrically connected to the positive output portion 110 and the lines electrically connected to the negative output portion 120 are respectively distributed on different output circuit boards, compared with the related technology that integrates the positive and negative lines on the same output circuit board, heat concentration is avoided, the heat dissipation area is increased, which is beneficial to the heat dissipation of the battery protection board, and thus helps to reduce the temperature of the battery.

[0049] Optionally, the positive output section 110 is disposed adjacent to the positive terminal of the battery cell 500, and the negative output section 120 is disposed adjacent to the negative terminal of the battery cell 500. This reduces the density of the circuit layers on the protection board body 100 and lowers the resistance value of the electrical connection between the battery cell 500 and the battery protection board, thereby reducing the heat generated by the battery. Due to the reduced path, the efficiency of the battery during charging and discharging can be improved.

[0050] Specifically, the battery cell 500 may include a positive electrode tab and a negative electrode tab. The positive electrode tab may be electrically connected to the positive electrode connection portion 130 of the battery protection board, and the negative electrode tab may be electrically connected to the negative electrode connection portion 140 of the battery protection board.

[0051] This application also discloses an electronic device, which includes a device body and the battery disclosed in the above embodiments. The device body has positive and negative interfaces spaced apart. The second end of the first output circuit board 200 is used for electrical connection with the positive interface, and the second end of the second output circuit board 300 is used for electrical connection with the negative interface. Specifically, the device body includes a motherboard, on which positive and negative interfaces are spaced apart.

[0052] The electronic device disclosed in this application, by setting up the battery as disclosed in the above embodiments, makes the first end of the first output circuit board 200 electrically connected to the positive output portion 110 of the protection board body 100, and the first end of the second output circuit board 300 electrically connected to the negative output portion 120 of the protection board body 100. This allows the lines electrically connected to the positive output portion 110 and the lines electrically connected to the negative output portion 120 to be distributed on different output circuit boards. Because the lines electrically connected to the positive output portion 110 and the lines electrically connected to the negative output portion 120 are distributed on different output circuit boards, compared to the related art where the positive and negative lines are integrated on the same output circuit board, heat concentration is avoided, the heat dissipation area is increased, which is beneficial for the heat dissipation of the battery protection board, and thus helps to reduce the battery temperature.

[0053] The above embodiments of this utility model mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0054] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A battery protection plate for electrically connecting with a device main body of an electronic device, the device main body having a positive electrode interface and a negative electrode interface which are spaced apart, characterized by, The battery protection board includes a protection board body (100), a first output circuit board (200), and a second output circuit board (300). The protection board body (100) has a positive output section (110) and a negative output section (120) spaced apart. The first end of the first output circuit board (200) is electrically connected to the positive output section (110), the first end of the second output circuit board (300) is electrically connected to the negative output section (120), the second end of the first output circuit board (200) is used to be electrically connected to the positive interface, and the second end of the second output circuit board (300) is used to be electrically connected to the negative interface.

2. The battery protection board according to claim 1, characterized in that, The main body (100) of the protection board is a rigid circuit board, while the first output circuit board (200) and the second output circuit board (300) are both flexible circuit boards.

3. The battery protection board according to claim 1, characterized in that, Both the positive output section (110) and the negative output section (120) include power pads (101), and both the first output circuit board (200) and the second output circuit board (300) include power lines (410). The power line (410) of the first output circuit board (200) is electrically connected to the power pad (101) of the positive output section (110), and the power line (410) of the second output circuit board (300) is electrically connected to the power pad (101) of the negative output section (120).

4. The battery protection board according to claim 3, characterized in that, Both the positive output section (110) and the negative output section (120) include a plurality of spaced power pads (101), and both the first output circuit board (200) and the second output circuit board (300) include a plurality of spaced power lines (410). The power lines (410) of the first output circuit board (200) are electrically connected to the power pads (101) of the positive output section (110) in a one-to-one correspondence, and the power lines (410) of the second output circuit board (300) are electrically connected to the power pads (101) of the negative output section (120) in a one-to-one correspondence.

5. The battery protection board according to claim 4, characterized in that, The positive output section (110) further includes a signal pad (102), and the first output circuit board (200) further includes a signal line (420), the signal line (420) of the first output circuit board (200) being electrically connected to the signal pad (102) of the positive output section (110); and / or, The negative output section (120) further includes a signal pad (102), and the second output circuit board (300) further includes a signal line (420). The signal line (420) of the second output circuit board (300) is electrically connected to the signal pad (102) of the negative output section (120).

6. The battery protection board according to claim 5, characterized in that, The signal lines (420) of the first output circuit board (200) are distributed among the plurality of power lines (410) of the first output circuit board (200); and / or, The signal lines (420) of the second output circuit board (300) are distributed among the multiple power lines (410) of the second output circuit board (300).

7. The battery protection board according to claim 5, characterized in that, The area of ​​the power pad (101) is larger than the area of ​​the signal pad (102).

8. The battery protection board according to claim 1, characterized in that, The second end of the first output circuit board (200) and the second end of the second output circuit board (300) are respectively provided with connectors (600). The connector (600) of the first output circuit board (200) is used to electrically connect to the positive terminal interface, and the connector (600) of the second output circuit board (300) is used to electrically connect to the negative terminal interface.

9. A battery, characterized in that, The battery includes a battery cell (500) and a battery protection board according to any one of claims 1 to 8, wherein the battery cell (500) is provided with tabs that are electrically connected to the battery protection board.

10. An electronic device, characterized in that, The device includes a main body and the battery as described in claim 9. The main body has a positive terminal interface and a negative terminal interface spaced apart. The second end of the first output circuit board (200) is electrically connected to the positive terminal interface, and the second end of the second output circuit board (300) is electrically connected to the negative terminal interface.

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