Protection plate, battery and terminal equipment

Abstract

The utility model discloses a protection board, a battery and terminal equipment, and belongs to the technical field of electronic components, the terminal equipment comprises the battery, the battery comprises the protection board, and the protection board comprises a printed circuit board, a flexible circuit board and an NTC temperature measurement element. The flexible circuit board is fixedly connected with the printed circuit board, the flexible circuit board is used for being electrically connected with a mainboard of the terminal equipment, the printed circuit board is used for being connected with a battery cell, the NTC temperature measuring element comprises a temperature measuring probe and a lead, and the temperature measuring probe is used for detecting the temperature of the battery cell when the printed circuit board is connected with the battery cell. The first end of the lead is electrically connected with the temperature measuring probe, the second end of the lead is electrically connected with the printed circuit board, and at least one of the temperature measuring probe and the lead is arranged on the flexible circuit board. When the lead of the NTC temperature measurement element is connected with the printed circuit board, the flexible circuit board of the protection board can fix the position of the NTC temperature measurement element, so that the NTC temperature measurement element does not need to be fixed manually, and manpower can be well saved.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic components, and specifically relates to a protection board, a battery and a terminal device. Background Art

[0002] With the rapid development of science and technology, terminal devices, such as mobile phones, play an increasingly important role in our daily lives. Terminal devices generate heat during operation, and abnormal temperature rise may affect the performance of terminal devices or even cause damage to terminal devices. Therefore, it is very important to monitor the temperature of terminal devices.

[0003] In the prior art, terminal equipment generally uses NTC (Negative Temperature Coefficient) temperature measuring elements to measure the temperature of its battery cells. NTC temperature measuring elements have the advantages of high measurement accuracy, fast response speed, small size, good stability, etc. However, when installing NTC temperature measuring elements, it is necessary to manually pick up the NTC temperature measuring element, fix the NTC temperature measuring element, and then manually connect at least two leads of the NTC temperature measuring element to the circuit board of the terminal equipment one by one, which makes the installation of NTC temperature measuring elements more labor-intensive. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a protection board, a battery and a terminal device, which can solve the problem of high labor consumption in the installation of NTC temperature measuring elements in related technologies.

[0005] In a first aspect, an embodiment of the present application provides a protection board, comprising: a printed circuit board, a flexible circuit board and an NTC temperature measuring element, wherein the flexible circuit board is fixedly connected to the printed circuit board, the flexible circuit board is used to be electrically connected to a mainboard of a terminal device, the printed circuit board is used to be connected to a battery cell, the NTC temperature measuring element comprises a temperature measuring probe and a lead, the temperature measuring probe is used to detect the temperature of the battery cell when the printed circuit board is connected to the battery cell, the first end of the lead is electrically connected to the temperature measuring probe, the second end of the lead is electrically connected to the printed circuit board, and at least one of the temperature measuring probe and the lead is provided on the flexible circuit board.

[0006] Optionally, the flexible circuit board is a thermally conductive flexible circuit board, and a portion of the lead wire and the temperature measuring probe are both packaged in the flexible circuit board.

[0007] Optionally, the flexible circuit board is a stacked structure, and a portion of the lead wire and the temperature measuring probe are both arranged between any two adjacent layers of the flexible circuit board.

[0008] Optionally, an orthographic projection of the flexible circuit board on the printed circuit board at least partially overlaps with the printed circuit board.

[0009] Optionally, the flexible circuit board includes a main body, a first connecting part and a second connecting part, the orthographic projection of the main body on the printed circuit board coincides with the printed circuit board, the main body is parallel to the printed circuit board, the first connecting part is connected to the main body and extends in a direction perpendicular to the main body, the second connecting part is connected to the first connecting part and extends in a direction parallel to the main body, and the second connecting part is attached to a side of the printed circuit board facing the main body, and a part of the lead and the temperature measuring probe are both arranged in the main body.

[0010] Optionally, the flexible circuit board further includes a third connecting portion and a fourth connecting portion;

[0011] The first connection portion is provided with an avoidance groove along a direction perpendicular to the main body, the third connection portion extends along a direction perpendicular to the main body, one end of the third connection portion passes through the avoidance groove and is connected to the main body;

[0012] The fourth connection portion is connected to the other end of the third connection portion, the fourth connection portion extends to the printed circuit board in a direction parallel to the main body, and a side of the fourth connection portion facing the main body is flush with a side of the printed circuit board facing away from the main body;

[0013] The second end of the lead wire passes through the third connection portion and the fourth connection portion in sequence and extends out, and the second end of the lead wire is electrically connected to a surface of the printed circuit board that is away from the main body.

[0014] Optionally, the protective plate also includes a first connector and a reinforcement plate, the first connector is electrically connected to the flexible circuit board, the reinforcement plate is fixedly connected to the flexible circuit board, the first connector and the reinforcement plate are respectively located on two opposite sides of the flexible circuit board, and their positions correspond to each other, and the first connector is used to be electrically connected to the main board.

[0015] Optionally, the flexible circuit board includes a main body, the orthographic projection of the main body on the printed circuit board coincides with the printed circuit board, the main body is parallel to the printed circuit board, the main body is provided with a protrusion, the protrusion extends in a direction parallel to the printed circuit board, the first connector and the reinforcement plate are both fixedly connected to the protrusion, and the first connector and the reinforcement plate are respectively located on two opposite sides of the protrusion.

[0016] Optionally, the protection plate further includes a connector, which is disposed on the printed circuit board and is used to connect to the battery cell.

[0017] In a second aspect, an embodiment of the present application provides a battery, which includes a battery cell and the protection plate mentioned above, wherein the protection plate is connected to the battery cell.

[0018] In a third aspect, an embodiment of the present application provides a terminal device, which includes the battery described above.

[0019] In the embodiment of the present application, at least one of the temperature probe and the lead of the NTC temperature measuring element is arranged on the flexible circuit board, and the flexible circuit board is fixedly connected to the printed circuit board. In this way, during the installation of the NTC temperature measuring element, after the flexible circuit board is fixedly connected to the printed circuit board, the position of the NTC temperature measuring element is relatively fixed, so that when the lead of the NTC temperature measuring element is connected to the printed circuit board, there is no need to manually fix the NTC temperature measuring element, which can save manpower. In addition, the flexible circuit board is an existing component used to be fixedly connected to the printed circuit board to realize its basic function. By arranging at least one of the temperature probe and the lead of the NTC temperature measuring element on the flexible circuit board, it is possible to fix the position of the NTC temperature measuring element without adding other structures, which can save costs and make the overall structure of the protection plate simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the protection plate disclosed in the embodiment of the present application;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 for Figure 1 A top view of

[0023] Figure 4 This is an exploded schematic diagram of the protection plate disclosed in the embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of the flexible circuit board and the NTC temperature measuring element disclosed in the embodiment of the present application;

[0025] Figure 6 for Figure 5 Explosion diagram of

[0026] Figure 7 This is an exploded schematic diagram of the flexible circuit board disclosed in the embodiment of the present application.

[0027] Description of reference numerals:

[0028] 100-printed circuit board;

[0029] 200-flexible circuit board, 210-graphite composite polyimide layer, 220-main body, 221-protrusion, 230-first connection part, 231-avoidance groove, 240-second connection part, 250-third connection part, 260-fourth connection part, 270, avoidance through hole;

[0030] 300-NTC temperature measuring element, 310-temperature measuring probe, 320-lead wire;

[0031] 400-first connector;

[0032] 500-Reinforcement plate;

[0033] 600-Connectors. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0035] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0036] The protection board, battery and terminal device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0037] Please refer to Figures 1 to 7 As shown, the present application discloses a protection board. Specifically, the disclosed protection board includes: a printed circuit board 100 , a flexible circuit board 200 and an NTC temperature measuring element 300 .

[0038] The flexible circuit board 200 is fixedly connected to the printed circuit board 100, and the flexible circuit board 200 is used to be electrically connected to the mainboard of the terminal device, so as to realize the electrical connection between the printed circuit board 100 and the mainboard. It should be noted that the connection here can be a direct connection, that is, the flexible circuit board 200 is directly electrically connected to the mainboard without other intermediate components, or it can be an indirect connection, that is, the flexible circuit board 200 is electrically connected to the mainboard through other intermediate components, for example, the flexible circuit board 200 is electrically connected to the sub-board, the sub-board is electrically connected to the mainboard, and the flexible circuit board 200 is indirectly electrically connected to the mainboard through the sub-board. In addition, the mainboard and the sub-board can be, for example, PCB (Printed Circuit Board).

[0039] The printed circuit board 100 is used to connect to the battery cell of the terminal device. The NTC temperature measuring element 300 includes a temperature measuring probe 310 and a lead 320. The temperature measuring probe 310 is used to detect the temperature of the battery cell when the printed circuit board 100 is connected to the battery cell. The temperature measuring probe 310 can be a thermistor chip, for example. In the specific use process, the temperature measuring probe 310 detects the temperature of the environment within a preset distance range of the battery cell. Within the preset distance range, the difference between the temperature of the environment and the temperature of the battery cell is small. The ambient temperature can be used to directly represent the battery cell temperature, or the ambient temperature can be processed by calculation to obtain the battery cell temperature.

[0040] The first end of the lead 320 is electrically connected to the temperature probe 310, and the second end of the lead 320 is electrically connected to the printed circuit board 100. Optionally, for example, the second end of the lead 320 can be welded to the printed circuit board 100 to achieve electrical connection between the second end of the lead 320 and the printed circuit board 100.

[0041] At least one of the temperature measuring probe 310 and the lead wire 320 is disposed on the flexible circuit board 200 . Specifically, the temperature measuring probe 310 or the lead wire 320 may be disposed on the flexible circuit board 200 alone, or both the temperature measuring probe 310 and the lead wire 320 may be disposed on the flexible circuit board 200 .

[0042] In the embodiment of the present application, at least one of the temperature probe 310 and the lead 320 of the NTC temperature measuring element 300 is arranged on the flexible circuit board 200, and the flexible circuit board 200 is fixedly connected to the printed circuit board 100. In this way, during the installation of the NTC temperature measuring element 300, after the flexible circuit board 200 is fixedly connected to the printed circuit board 100, the position of the NTC temperature measuring element 300 is relatively fixed, so that when the lead 320 of the NTC temperature measuring element 300 is connected to the printed circuit board 100, there is no need to manually fix the NTC temperature measuring element 300, which can save manpower. In addition, the printed circuit board 100 of the terminal device is generally fixedly connected with the flexible circuit board 200. By arranging at least one of the temperature probe 310 and the lead 320 of the NTC temperature measuring element 300 on the flexible circuit board 200, it is not necessary to add other structures to achieve the fixation of the position of the NTC temperature measuring element 300, which can save costs and make the overall structure of the protection board simpler.

[0043] In another embodiment, the flexible circuit board 200 is a thermally conductive flexible circuit board 200. Since it is heat-conductive, a portion of the lead wire 320 and the temperature measuring probe 310 can be encapsulated in the flexible circuit board 200 without causing heat accumulation to damage the NTC temperature measuring element 300. In addition, in this configuration, a portion of the lead wire 320 and the temperature measuring probe 310 are both placed in the flexible circuit board 200, which can reduce the impact of external factors such as external force, dust, moisture, etc. on them, thereby extending the service life of the temperature measuring probe 310 and the lead wire 320.

[0044] During the specific use of the protection plate provided in this embodiment, the temperature of the flexible circuit board 200 changes with the external temperature, and transfers heat to the temperature measuring probe 310 by heat conduction, so that the temperature measuring probe 310 can detect the temperature of the flexible circuit board 200. In addition, the temperature measuring probe 310 detects the temperature of the flexible circuit board 200 and converts it into an electrical signal and transmits it to the printed circuit board 100 for processing through the lead 320.

[0045] In other embodiments, a portion of the lead wire 320 and the temperature measuring probe 310 may also be disposed outside the flexible circuit board 200 .

[0046] Optionally, an opening for accommodating the lead 320 and the temperature probe 310 may be provided on the flexible circuit board 200, and a portion of the lead 320 and the temperature probe 310 are both provided in the opening, so that the lead 320 and the temperature probe 310 are both provided on the flexible circuit board 200. Figure 7As shown, the flexible circuit board 200 is a stacked structure, and a portion of the lead 320 and the temperature probe 310 are both disposed between any two adjacent layers of the flexible circuit board 200. In this way, when processing the flexible circuit board 200, a portion of the lead 320 and the temperature probe 310 are both disposed between any two adjacent layers of the flexible circuit board 200, and the lead 320 and the temperature probe 310 can be disposed on the flexible circuit board 200. Compared with the previous embodiment, this method does not require opening, omits the step of processing the opening, and is more convenient to operate.

[0047] In a further embodiment, the flexible circuit board 200 may include, for example, at least two graphite composite polyimide layers 210 stacked in layers, and a portion of the lead 320 and the temperature probe 310 are disposed between any two adjacent graphite composite polyimide layers 210. It should be noted that the flexible circuit board 200 may also include other layers, such as a copper layer, which is only an example and will not be described in detail.

[0048] In addition, in this embodiment, the flexible circuit board 200 can be set as a stacked structure, and a part of the lead 320 and the temperature measuring probe 310 can be set between any two adjacent layers of the flexible circuit board 200 to achieve the above-mentioned encapsulation of a part of the lead 320 and the temperature measuring probe 310 in the flexible circuit board 200.

[0049] In another embodiment, the orthographic projection of the flexible circuit board 200 on the printed circuit board 100 at least partially overlaps with the printed circuit board 100, that is, at least a portion of the flexible circuit board 200 is arranged opposite to the printed circuit board 100. In this way, the flexible circuit board 200 and the printed circuit board 100 at least partially overlap, so that the overall protection plate can be more compact and smaller in size.

[0050] Of course, in other embodiments, the flexible circuit board 200 and the printed circuit board 100 may be staggered. In this way, the flexible circuit board 200 and the printed circuit board 100 occupy a large space, and the compactness of the protection plate is poor.

[0051] In a further embodiment, reference Figure 5 and Figure 6 As shown, the flexible circuit board 200 includes a main body 220, a first connecting portion 230 and a second connecting portion 240. The orthographic projection of the main body 220 on the printed circuit board 100 coincides with the printed circuit board 100. The main body 220 is parallel to the printed circuit board 100. The first connecting portion 230 is connected to the main body 220 and extends in a direction perpendicular to the main body 220. The second connecting portion 240 is connected to the first connecting portion 230 and extends in a direction parallel to the main body 220. The second connecting portion 240 is attached to a side of the printed circuit board 100 facing the main body 220. A portion of the lead 320 and the temperature measuring probe 310 are both arranged in the main body 220.

[0052] In this embodiment, the second connection part 240 extends in a direction parallel to the main body 220, and the second connection part 240 is in contact with the side of the printed circuit board 100 facing the main body 220, so that the contact area between the two can be larger, thereby making the connection reliability between the two better. In addition, compared with the first connection part 230 extending in the first direction, which intersects with the main body 220 but is not perpendicular, by extending the first connection part 230 in a direction perpendicular to the main body 220, the length of the first connection part 230 can be shorter, and the first connection part 230 can occupy less space, thereby saving costs and making the structure of the protection plate more compact.

[0053] In other embodiments, the second connection portion 240 may extend in a direction intersecting the main body 220 and be connected to the main body 220. In this case, the contact area between the second connection portion 240 and the main body 220 is relatively small, and the connection reliability between the two is relatively poor.

[0054] In other embodiments, the first connection portion 230 may extend along a first direction, and the first direction may intersect with the main body 220 but not be perpendicular thereto. Figure 5 The direction indicated by the arrow line B.

[0055] In addition, as a specific implementation, for example, the second connection portion 240 is connected to a surface of the printed circuit board 100 facing the main body 220 to achieve a fixed connection between the flexible circuit board 200 and the printed circuit board 100 .

[0056] In a further embodiment, reference Figure 5 and Figure 6 As shown, the flexible circuit board 200 further includes a third connection part 250 and a fourth connection part 260. The first connection part 230 is provided with an avoidance groove 231 in a direction perpendicular to the main body 220, and the third connection part 250 extends in a direction perpendicular to the main body 220. One end of the third connection part 250 passes through the avoidance groove 231 and is connected to the main body 220. The fourth connection part 260 is connected to the other end of the third connection part 250, and the fourth connection part 260 extends to the printed circuit board 100 in a direction parallel to the main body 220, and the side of the fourth connection part 260 facing the main body 220 is flush with the side of the printed circuit board 100 facing away from the main body 220. The second end of the lead 320 passes through the third connection part 250 and the fourth connection part 260 in sequence and extends out, and the second end of the lead 320 is electrically connected to the side of the printed circuit board 100 facing away from the main body 220.

[0057] In this embodiment, the exposed length of the lead 320 can be reduced due to the presence of the fourth connection portion 260, and the fourth connection portion 260 has a guiding function, so that the portion of the lead 320 corresponding to the fourth connection portion 260 can be kept parallel to the printed circuit board 100, so that the connection between the lead 320 and the printed circuit board 100 can be completed more conveniently. In other embodiments, the fourth connection portion 260 may not be provided. In addition, during the specific operation process, for example, the second end of the lead 320 can be automatically welded to the side of the printed circuit board 100 away from the main body 220 by a machine, so as to realize the electrical connection between the second end of the lead 320 and the side of the printed circuit board 100 away from the main body 220.

[0058] In this embodiment, as described above, by extending the third connection portion 250 in a direction perpendicular to the main body 220, the length of the third connection portion 250 can be relatively short, thereby saving materials and making the protective plate more compact. In other examples, the third connection portion 250 can extend in a second direction that intersects with the main body 220 but is not perpendicular to it. For example, the second direction is Figure 5 The direction indicated by the arrow line A.

[0059] In this embodiment, the first connection part 230 is provided with an avoidance groove 231 in a direction perpendicular to the main body 220, and one end of the third connection part 250 passes through the avoidance groove 231 and is connected to the main body 220. In this way, the third connection part 250 is at least partially placed in the first connection part 230, which can reduce the volume of the external space occupied by the third connection part 250 and make the volume of the protection plate smaller. In other embodiments, the third connection part 250 can also be located on one side of the first connection part 230. Compared with the first connection part 230 being provided with an avoidance groove 231 in a direction perpendicular to the main body 220 and one end of the third connection part 250 passing through the avoidance groove 231, this method occupies a larger space, resulting in a larger volume of the protection plate.

[0060] In a further embodiment, in order to improve the stability of the protection plate, the main body 220, the first connection part 230, the second connection part 240, the third connection part 250 and the fourth connection part 260 may be, for example, an integrated structure. Of course, in other embodiments, the main body 220, the first connection part 230, the second connection part 240, the third connection part 250 and the fourth connection part 260 may also be a split structure, and the first connection part 230 and the third connection part 250 may be connected to the main body 220 by, for example, welding, bolting or gluing, and similarly, the second connection part 240 may be connected to the first connection part 230 by, for example, welding, bolting or gluing, and the fourth connection part 260 may be connected to the third connection part 250 by, for example, welding, bolting or gluing.

[0061] Optionally, the second connection part 240 may be provided with an avoidance through hole 270, which is connected to the avoidance groove 231. In this embodiment, when processing the flexible circuit board, the avoidance through hole 270 and the avoidance groove 231 can be formed simultaneously by opening a hole when the first connection part 230 and the second connection part 240 are coplanar, so that there is no need to strictly control the size of the avoidance groove 231, and a part of the third connection part 250 can be reliably located in the avoidance groove 231, thereby facilitating the processing of the flexible circuit board. At the same time, this structure is more convenient for bending the second connection part 240 so that the second connection part 240 is perpendicular to the first connection part 230.

[0062] In another embodiment, reference Figures 2 to 4 As shown, the protection board also includes a first connector 400 and a reinforcing plate 500. The first connector 400 is electrically connected to the flexible circuit board 200, and the reinforcing plate 500 is fixedly connected to the flexible circuit board 200. The first connector 400 and the reinforcing plate 500 are respectively located on two opposite sides of the flexible circuit board 200, and the positions of the two correspond. The first connector 400 is used to be electrically connected to the main board. The reinforcing plate 500 is, for example, a metal plate, more specifically, a steel plate. The first connector 400 and the flexible circuit board 200 are electrically connected and mechanically connected to each other by, for example, plug-in connection.

[0063] In this embodiment, the reinforcing plate 500 can improve the strength of the portion of the flexible circuit board 200 connected to the first connector 400, thereby improving the anti-interference ability and stability of the portion of the flexible circuit board 200 connected to the first connector 400. In addition, when the first connector 400 is electrically connected to the mainboard by plug-in connection, when connecting the first connector 400 to the mainboard or separating the first connector 400 from the mainboard, it is necessary to press or bend the portion of the flexible circuit board 200 connected to the first connector 400. By arranging the reinforcing plate 500 in this portion, the reinforcing plate 500 can disperse the force borne by the portion, so that each position of the portion is subjected to a more uniform force, thereby preventing the occurrence of damage to the flexible circuit board 200 due to stress concentration.

[0064] In a further embodiment, a second connector may be provided on the mainboard, and the electrical connection between the first connector 400 and the mainboard may be achieved by plugging or snapping the first connector 400 and the second connector.

[0065] Optionally, in other embodiments, the protection plate may not be provided with the reinforcing plate 500 .

[0066] In a further embodiment, reference Figure 5 and Figure 6As shown, the flexible circuit board 200 includes a main body 220, and the orthographic projection of the main body 220 on the printed circuit board 100 coincides with the printed circuit board 100, that is, the main body 220 is arranged opposite to the printed circuit board 100. The main body 220 is parallel to the printed circuit board 100, and the main body 220 is provided with a protrusion 221, which extends in a direction parallel to the printed circuit board 100, and the first connector 400 and the reinforcing plate 500 are both fixedly connected to the protrusion 221, and the first connector 400 and the reinforcing plate 500 are respectively located on two opposite sides of the protrusion 221. With such a configuration, the main body 220 only needs to partially protrude to achieve the installation of the first connector 400 and the reinforcement plate 500, and the main body 220 as a whole extends in a direction parallel to the printed circuit board 100 to form a larger mounting portion, the first connector 400 and the reinforcement plate 500 are both fixedly connected to the mounting portion, and the first connector 400 and the reinforcement plate 500 are respectively located on two opposite sides of the mounting portion. Compared with the method provided in this embodiment, the size of the flexible circuit board 200 is smaller, so that the protection plate as a whole can be more compact and the cost can be lower.

[0067] Of course, in other embodiments, the main body 220 may extend as a whole in a direction parallel to the printed circuit board 100 to form a mounting portion, the first connector 400 and the reinforcing plate 500 may both be fixedly connected to the mounting portion, and the first connector 400 and the reinforcing plate 500 may be respectively located on two opposite sides of the mounting portion.

[0068] In another embodiment, reference Figure 1 and Figure 4 As shown, the protection plate further includes a connector 600, which is disposed on the printed circuit board 100 and is used to connect with the battery cell. The connector 600 is, for example, a metal connector 600, more specifically, made of nickel. By adding the connector 600, the connection strength of the connection position between the printed circuit board 100 and the battery cell can be improved, thereby extending the service life of the printed circuit board 100 and making the printed circuit board 100 less prone to damage.

[0069] In other embodiments, the printed circuit board 100 may be directly connected to the battery cell without the aid of the connector 600 .

[0070] In a further embodiment, Figure 1 and Figure 4 As shown, the connector 600 may include, for example, a first connecting plate and a second connecting plate, the first connecting plate being attached to and connected to a side of the printed circuit board 100 that is away from the main body 220, the second connecting plate being perpendicular to and connected to the first connecting plate, and at least one of the first connecting plate and the second connecting plate being attached to and connected to the battery cell. Specifically, for example, the first connecting plate or the second connecting plate may be attached to and connected to the battery cell alone, or the first connecting plate and the second connecting plate may be attached to and connected to the battery cell together.

[0071] In this embodiment, by making the first connecting plate fit and connect with the side of the printed circuit board 100 away from the main body 220, the contact area between the connecting member 600 and the printed circuit board 100 can be larger, so that the connection between the connecting member 600 and the printed circuit board 100 can be more reliable. Similarly, by making at least one of the first connecting plate and the second connecting plate fit with the battery cell, the contact area between the connecting member 600 and the battery cell can be larger, and the connection between the connecting member 600 and the printed circuit board 100 can be more reliable.

[0072] In other embodiments, the connector 600 may have a first connection structure and a second connection structure, wherein the first connection structure is in point contact with and connected to a surface of the printed circuit board 100 that is away from the main body 220, and the second connection structure is in point contact with and connected to the battery cell. In this case, the contact areas between the connector 600 and the printed circuit board 100 and the battery cell are small, and the connection reliability is poor.

[0073] Furthermore, an embodiment of the present application also provides a battery, which includes a battery cell and the protection plate mentioned above, and the protection plate is connected to the battery cell.

[0074] Furthermore, an embodiment of the present application also provides a terminal device, which includes the battery described above, and the terminal device is, for example, a mobile phone, a tablet computer, etc.

[0075] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A protective plate, characterized in that: include: A printed circuit board (100), a flexible circuit board (200), and an NTC temperature measuring element (300), wherein the flexible circuit board (200) is fixedly connected to the printed circuit board (100), the flexible circuit board (200) is used to be electrically connected to a mainboard of a terminal device, the printed circuit board (100) is used to be connected to an electric core, the NTC temperature measuring element (300) comprises a temperature measuring probe (310) and a lead wire (320), the temperature measuring probe (310) is used to detect the temperature of the electric core when the printed circuit board (100) is connected to the electric core, a first end of the lead wire (320) is electrically connected to the temperature measuring probe (310), a second end of the lead wire (320) is electrically connected to the printed circuit board (100), and at least one of the temperature measuring probe (310) and the lead wire (320) is provided on the flexible circuit board (200).

2. The protection plate according to claim 1, characterized in that: The flexible circuit board (200) is a thermally conductive flexible circuit board (200), and a portion of the lead wire (320) and the temperature measuring probe (310) are both packaged in the flexible circuit board (200).

3. The protection plate according to claim 1, characterized in that: The flexible circuit board (200) is a stacked structure, and a portion of the lead wire (320) and the temperature measuring probe (310) are both arranged between any two adjacent layers of the flexible circuit board (200).

4. The protection plate according to claim 1, characterized in that: The orthographic projection of the flexible circuit board (200) on the printed circuit board (100) at least partially overlaps with the printed circuit board (100).

5. The protection plate according to claim 4, characterized in that: The flexible circuit board (200) comprises a main body (220), a first connecting portion (230) and a second connecting portion (240); the orthographic projection of the main body (220) on the printed circuit board (100) coincides with the printed circuit board (100); the main body (220) is parallel to the printed circuit board (100); the first connecting portion (230) is connected to the main body (220) and extends in a direction perpendicular to the main body (220); the second connecting portion (240) is connected to the first connecting portion (230) and extends in a direction parallel to the main body (220); the second connecting portion (240) is in contact with a surface of the printed circuit board (100) facing the main body (220); a portion of the lead wire (320) and the temperature measuring probe (310) are both arranged in the main body (220).

6. The protection plate according to claim 5, characterized in that: The flexible circuit board (200) further comprises a third connecting portion (250) and a fourth connecting portion (260); The first connecting portion (230) is provided with an avoidance groove (231) along a direction perpendicular to the main body (220); the third connecting portion (250) extends along a direction perpendicular to the main body (220); one end of the third connecting portion (250) passes through the avoidance groove (231) and is connected to the main body (220); The fourth connection portion (260) is connected to the other end of the third connection portion (250), the fourth connection portion (260) extends to the printed circuit board (100) in a direction parallel to the main body (220), and a side of the fourth connection portion (260) facing the main body (220) is flush with a side of the printed circuit board (100) facing away from the main body (220); The second end of the lead wire (320) passes through the third connection portion (250) and the fourth connection portion (260) in sequence and extends out, and the second end of the lead wire (320) is electrically connected to a side of the printed circuit board (100) that is away from the main body (220).

7. The protection plate according to claim 1, characterized in that: The protection plate further comprises a first connector (400) and a reinforcing plate (500), wherein the first connector (400) is electrically connected to the flexible circuit board (200), and the reinforcing plate (500) is fixedly connected to the flexible circuit board (200), wherein the first connector (400) and the reinforcing plate (500) are respectively located on two opposite sides of the flexible circuit board (200), and the positions of the two correspond, and the first connector (400) is used to be electrically connected to the main board.

8. The protection plate according to claim 7, characterized in that: The flexible circuit board (200) comprises a main body (220), the orthographic projection of the main body (220) on the printed circuit board (100) coincides with the printed circuit board (100), the main body (220) is parallel to the printed circuit board (100), the main body (220) is provided with a protruding portion (221), the protruding portion (221) extends in a direction parallel to the printed circuit board (100), the first connector (400) and the reinforcing plate (500) are both fixedly connected to the protruding portion (221), and the first connector (400) and the reinforcing plate (500) are respectively located on two opposite sides of the protruding portion (221).

9. The protection plate according to claim 1, characterized in that: The protection plate further comprises a connecting member (600), wherein the connecting member (600) is arranged on the printed circuit board (100) and is used to be connected to the battery cell.

10. A battery, characterized in that: It comprises a battery cell and a protection plate as described in any one of claims 1 to 9, wherein the protection plate is connected to the battery cell.

11. A terminal device, characterized in that: Comprising the battery as claimed in claim 10.

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