Protection board circuit and electronic equipment

Abstract

The embodiment of the utility model provides a protection board circuit and electronic equipment. The protection board circuit comprises a protection integration module, a voltameter integration module and a precision resistor, the precision resistor comprises a plurality of detection terminals, any two detection terminals form a detection terminal group, and the detection terminal group has a detection resistance value; the protection integration module is electrically connected with a detection terminal group with a first detection resistance value, the voltameter integration module is electrically connected with a detection terminal group with a second detection resistance value, and the first detection resistance value is not equal to the second detection resistance value. According to the protection board circuit provided by the embodiment of the invention, the problems that more protection board layout space is occupied, the internal resistance of the circuit is increased and heat is increased due to the fact that corresponding precision resistors are respectively arranged for the protection integration module and the voltameter integration module in the circuit are avoided.

Description

Technical Field

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

[0002] With the development of science and technology, various electronic devices have been widely used in all aspects of people's lives. In electronic devices, protection boards are generally required to detect the charge and discharge current of the battery components in the electronic devices, and protect the electronic devices when the charge and discharge current of the battery components is overcurrent. In the protection board, there is generally a fuel gauge integrated circuit and multiple protection integrated circuits, all of which need to detect the current of the battery components through precision resistors connected in series in the charge and discharge circuit.

[0003] In the prior art, the protection integrated circuit requires a precision resistor with a smaller resistance, while the fuel gauge integrated circuit requires a precision resistor with a larger resistance. Therefore, it is necessary to set corresponding precision resistors for the protection integrated circuit and the fuel gauge integrated circuit in the protection board circuit. That is, the number of precision resistors in the circuit protection board is large, which affects the layout structure of the protection board circuit. At the same time, a large number of precision resistors will also increase the internal resistance of the charging and discharging circuit of the electronic device and cause more heat. Utility Model Content

[0004] The present application aims to provide a protection board circuit and an electronic device to solve the problem that in the existing protection board circuit, corresponding precision resistors need to be set for the protection integrated circuit and the power meter integrated circuit respectively, resulting in more protection board layout space being occupied and the internal resistance of the circuit being increased and heat being increased.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In the first aspect, the present application discloses a protection board circuit, which may include at least: a protection integrated module, a fuel gauge integrated module, and a precision resistor; the precision resistor includes a plurality of detection terminals, any two of the detection terminals form a detection terminal group, and the detection terminal group has a detection resistance value; the protection integrated module is electrically connected to a detection terminal group having a first detection resistance value, and the fuel gauge integrated module is electrically connected to a detection terminal group having a second detection resistance value, and the first detection resistance value is not equal to the second detection resistance value.

[0007] Optionally, the precision resistor includes a resistor body and two electrodes, the electrodes and the detection terminals are electrically connected to the resistor body; the two electrodes are spaced apart on the resistor body; and the plurality of detection terminals are spaced apart between the electrodes.

[0008] Optionally, the resistor body includes a first end and a second end disposed away from each other along a first direction, the two electrodes are disposed at the first end and the second end respectively, and the plurality of detection terminals are disposed between the two electrodes at intervals along the first direction.

[0009] Optionally, the spacing distance between two adjacent detection terminals is greater than or equal to 0.15 mm.

[0010] Optionally, the resistor body includes a protective layer, an alloy layer, an adhesive layer and a substrate arranged in sequence along the second direction; the adhesive layer is used to fix the alloy layer on the substrate; the detection terminal and the electrode are both arranged on the protective layer, and the detection terminal and the electrode are both electrically connected to the alloy layer.

[0011] Optionally, the protection board circuit includes a power terminal and a load terminal; the power terminal and the load terminal are electrically connected; the power terminal is used to be electrically connected to the battery cell assembly; the load terminal is used to be electrically connected to the load; the precision resistor is connected in series between the load terminal and the power terminal.

[0012] Optionally, the protection integrated module includes: a protection integrated module body and a first input terminal group and a first output terminal group arranged on the protection integrated module body; the first input terminal group is electrically connected to the detection terminal group having a first detection resistance value; the protection board circuit also includes a first switch component, the first switch component is connected in series between the load terminal and the power terminal, and the first switch component is electrically connected to the first output terminal group; the protection integrated module body is used to detect the voltage across the detection terminal group having the first detection resistance value through the first input terminal group, and obtain the current condition in the protection board circuit in combination with the first detection resistance value analysis, and based on the current condition in the protection board circuit, control the first switch component to be turned on or off through the first output terminal group.

[0013] Optionally, the protection board circuit also includes a battery cell temperature detection module; the fuel meter integrated module includes a fuel meter integrated module body and a second input terminal group, a third input terminal group, a fourth input terminal group and a second output terminal group arranged on the fuel meter integrated module body; the second input terminal group is electrically connected to the detection terminal having a second detection resistance value; the third input terminal group is used to electrically connect to the battery cell temperature detection module to obtain the temperature condition of the battery cell assembly; the fourth input terminal group is used to electrically connect to the battery cell assembly to obtain the voltage condition of the battery cell assembly; the fuel meter integrated module body is used to detect the voltage of the detection terminal group having a second detection resistance value through the second input terminal group, and obtain the current condition in the protection board circuit in combination with the second detection resistance value, and output the current state in the protection board circuit, the temperature condition and the voltage condition of the battery cell assembly to the outside through the second output terminal group.

[0014] Optionally, the protection board circuit also includes a battery cell protection integrated module, a fuse assembly and a second switch assembly, and the battery cell protection integrated module includes: a battery cell protection integrated module body and a fifth input terminal group and a third output terminal group arranged on the battery cell protection integrated module body; the fifth input terminal group is electrically connected to the power terminal; the third output terminal group is electrically connected to the second switch assembly; the fuse assembly is connected in series in the protection board circuit; the second switch assembly is electrically connected to the fuse assembly and the power terminal; the battery cell protection integrated module body is used to control the conduction or disconnection of the second switch assembly based on the voltage of the battery cell detected by the fifth input terminal group, thereby controlling the conduction or fusing of the fuse assembly.

[0015] In a second aspect, the present application further discloses an electronic device, which includes the protection board circuit described in any one of the above items.

[0016] In an embodiment of the present application, a protection board circuit is provided, the protection board circuit includes a protection integrated module, an electric meter integrated module, and a precision resistor; the precision resistor includes at least a plurality of detection terminals, and any two detection terminals form a detection terminal group, and the detection terminal group has a detection resistance value; the protection integrated module is electrically connected to a detection terminal group having a first detection resistance value, and the electric meter integrated module is electrically connected to a detection terminal group having a second detection resistance value, wherein the first detection resistance value is not equal to the second detection resistance value. The protection board circuit provided in the present application provides at least two detection terminal groups with different detection resistance values ​​by setting a plurality of detection terminals on the resistor body of the precision resistor, so as to provide at least two detection terminal groups with different detection resistance values ​​through the combination selection between the plurality of detection terminals. In the application, the protection integrated module and the electric meter integrated module are connected in series to the charge and discharge circuit of the battery cell assembly, and the protection integrated module and the electric meter integrated module are respectively electrically connected to the detection terminal group, so that the protection integrated circuit and the electric meter integrated circuit respectively obtain the required detection resistance value. The protection board circuit provided in this embodiment avoids the problem of setting corresponding precision resistors for the protection integrated module and the electric meter integrated module in the circuit, which occupies more protection board layout space and increases the internal resistance of the circuit and increases the heat generation.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of the protection board circuit described in this application;

[0020] Figure 2 is a schematic diagram of a precision resistor used for protecting a board circuit as described in this application;

[0021] Figure 3 Schematic diagram of a precision resistor used as an example in this application.

[0022] Figure numerals: 1. protection integrated module; 11. protection integrated module body; 12. first input terminal group; 13. first output terminal group; 2. power meter integrated module; 21. power meter integrated module body; 22. second input terminal group; 23. third input terminal group; 24. fourth input terminal group; 25. second output terminal group; 3. precision resistor; 31. detection terminal; 311. first detection terminal; 312. second detection terminal; 313. third detection terminal; 32. resistor body; 321. protection layer; 322. alloy layer; 323. adhesive layer; 324. substrate; 33. electrode; 4. power terminal; 5. load terminal; 6. first switch component; 7. battery cell temperature detection module; 8. battery cell protection integrated module; 81. battery cell protection integrated module body; 82. fifth input terminal group; 83. third output terminal group; 9. fuse component; 10. second switch component. DETAILED DESCRIPTION

[0023] The embodiments of the utility model will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The embodiments of the present application provide at least one of a protection board circuit and an electronic device. The embodiments of the present application may not limit the specific type of the electronic device.

[0028] Reference Figure 1 and Figure 2 , showing a schematic diagram of the protection board circuit and the precision resistor described in the present application, in the protection board circuit described in the present application, at least may include: a protection integrated module 1, an electric meter integrated module 2, and a precision resistor 3; the precision resistor 3 includes a plurality of detection terminals 31, any two detection terminals 31 form a detection terminal group, and the detection terminal group has a detection resistance value; in a specific application, the protection integrated module 1 is electrically connected to a detection terminal group having a first detection resistance value, and the electric meter integrated module 2 is electrically connected to a detection terminal group having a second detection resistance value, and the first detection resistance value is not equal to the second detection resistance value, so that the protection integrated module 1 and the electric meter integrated module 2 respectively obtain the required detection resistance values.

[0029] In an embodiment of the present application, a protection board circuit is provided, the protection board circuit includes a protection integrated module 1, an electric meter integrated module 2, and a precision resistor 3; a plurality of detection terminals 31 are provided on the precision resistor, and a detection terminal group is formed by any two detection terminals 31, and the detection resistance values ​​of at least two of the detection terminal groups are not equal to provide different resistance values; the protection integrated module 1 and the electric meter integrated module 2 are respectively electrically connected to the detection terminal group, and are electrically connected to a detection terminal group having a second detection resistance value, wherein the first detection resistance value is not equal to the second detection resistance value. The protection board circuit provided in the present application provides at least two detection terminal groups with different detection resistance values ​​by providing a plurality of detection terminals on the resistor body of the precision resistor, so as to provide at least two detection terminal groups with different detection resistance values ​​through the combination selection between the plurality of detection terminals.

[0030] For example, refer to Figure 3, shows a precision resistor 3 with three detection terminals 31, the three detection terminals 31 can be combined into three detection terminal groups in pairs, wherein the resistance between the first detection terminal 311 and the second detection terminal 312 can be selected as 0.5 milliohms, the resistance between the second detection terminal 312 and the third detection terminal 313 can be selected as 1 milliohm, and the resistance between the first detection terminal 311 and the third detection terminal 313 is 1.5 milliohms; in application, if the detection resistance value required by the protection integrated module 1 is 0.5 milliohms, and the detection resistance value required by the fuel gauge integrated module is 1.5 milliohms, the protection integrated module 1 is electrically connected to the first detection terminal 311 and the second detection terminal 312, and the fuel gauge integrated module 2 is electrically connected to the first detection terminal 311 and the third detection terminal 313, so that the protection integrated module 1 and the fuel gauge integrated module 2 respectively obtain the required detection resistance values ​​on one precision resistor 3 to detect the current condition of the protection board circuit.

[0031] In a specific application, the protection integrated module 1 and the electricity meter integrated module 2 respectively detect the voltage value between their corresponding detection terminals 31, and combine the resistance value of their detection resistors to calculate the current condition in the protection board circuit through the operational relationship between voltage, resistance and current.

[0032] It should be noted that those skilled in the art can choose to set the number of detection terminals 31 and the resistance value between the detection terminals 31 according to actual production and use requirements, and this is not specifically limited in the present application.

[0033] Optionally, the precision resistor 3 described in the present application includes a resistor body 32 and two electrodes 33 , the electrodes 33 and the detection terminals 31 are electrically connected to the resistor body 32 ; the two electrodes 33 are spaced apart on the resistor body 32 ; and a plurality of detection terminals 31 are spaced apart between the electrodes 33 .

[0034] The precision resistor 3 provided in the embodiment of the present application includes a resistor body 32 and two electrodes 33 arranged at intervals. In application, the precision resistor 3 is soldered to the protection board circuit through the two electrodes 33. The detection terminal 31 between the electrodes 33 is used to form a detection terminal group, which is electrically connected to the protection integrated module 1 and the power meter integrated module 2 to provide the required detection resistance value.

[0035] Optionally, the resistor body 32 described in the present application includes a first end and a second end disposed in opposite directions along a first direction, two electrodes 33 are disposed at the first end and the second end respectively, and a plurality of detection terminals 31 are disposed between the two electrodes 33 at intervals along the first direction.

[0036] In the embodiment of the present application, the precision resistor 3 provided has electrodes 33 respectively arranged at the two ends of the resistor body 32 along the first direction, and the detection terminals 31 are arranged between the electrodes 33 at intervals along the first direction, so as to maximize the reasonable utilization of the layout space of the precision resistor, and the precision resistor 3 is electrically connected to the protection board circuit through the electrodes 33 arranged at both ends, so that the installation structure of the precision resistor is more stable, and more detection terminals 31 can be arranged between the electrodes 33 to provide more detection resistor resistance value options.

[0037] Optionally, the spacing distance between two adjacent detection terminals 31 described in the present application is greater than or equal to 0.15 mm.

[0038] In the embodiment of the present application, the interval between two adjacent detection terminals 31 is at least 0.15 mm. Since soldering is generally used to electrically connect the protection integrated module 1, the electric meter integrated module 2 and the detection terminals 31 on the precision resistor 3, the interval between adjacent detection terminals 31 is set to be greater than or equal to 0.15 mm to avoid the phenomenon of soldering short circuit during welding.

[0039] Optionally, the resistor body 32 described in the present application includes a protective layer 321, an alloy layer 322, an adhesive layer 323 and a substrate 324 arranged in sequence along the second direction; the adhesive layer 323 is used to fix the alloy layer 322 on the substrate 324; the detection terminal 31 and the electrode 33 are both arranged on the protective layer 321, and the detection terminal 31 and the electrode 33 are both electrically connected to the alloy layer 322.

[0040] In the embodiment of the present application, the resistor body 32 includes a protective layer 321, an alloy layer 322, an adhesive layer 323 and a substrate 324 arranged in sequence along the second direction; the adhesive layer 323 is used to fix the alloy layer 322 on the substrate 324; the detection terminal 31 and the electrode 33 are both arranged on the protective layer 321, and the detection terminal 31 and the electrode 33 are both electrically connected to the alloy layer 322. When the precision resistor is mounted on the protection board, the electrode is soldered to the protection board circuit, and the protective layer prevents the alloy layer 322 from contacting the circuit board and causing a short circuit.

[0041] Optionally, the protection board circuit described in the present application includes a power terminal 4 and a load terminal 5; the power terminal 4 and the load terminal 5 are electrically connected; the power terminal 4 is used to be electrically connected to the battery cell assembly; the load terminal 5 is used to be electrically connected to the load; the precision resistor 3 is connected in series between the load terminal 5 and the power terminal 4; the protection integrated module 1 and the fuel meter integrated module 2 are electrically connected to the detection terminal group on the precision resistor 3.

[0042] In an embodiment of the present application, the protection board circuit may also include at least a power terminal 4 and a load terminal 5; the power terminal 4 and the load terminal 5 are electrically connected; the power terminal 4 is used to be electrically connected to the battery cell assembly to obtain electrical energy; the load terminal 5 is used to be electrically connected to the load to transmit the electrical energy obtained by the power terminal 4 to the load assembly; the precision resistor 3 is connected in series between the load terminal 5 and the power terminal 4, and at the same time, the protection integrated module 1 and the fuel meter integrated module 2 are electrically connected to the corresponding detection terminal group on the precision resistor 3, so as to detect the current condition of the protection board circuit through the detection resistance value provided by the corresponding detection terminal group.

[0043] Optionally, the protection integrated module 1 described in the present application includes: a protection integrated module body 11 and a first input terminal group 12 and a first output terminal group 13 arranged on the protection integrated module body; the first input terminal group 12 is electrically connected to a detection terminal group having a first detection resistance value; the protection board circuit also includes at least a first switch component 6, the first switch component 6 is connected in series between the load terminal 5 and the power terminal 4, and the first switch component 6 is electrically connected to the first output terminal group 13; the protection integrated module body 11 is used to detect the voltage across the detection terminal group having a first detection resistance value through the first input terminal group 12, and obtain the current condition in the protection board circuit in combination with the first detection resistance value analysis, and based on the current condition in the protection board circuit, control the first switch component 6 to turn on or off the protection board circuit through the first output terminal group 13.

[0044] In an embodiment of the present application, the protection integrated module body 11 is electrically connected to the corresponding detection terminal group through the first input terminal group 12, and is electrically connected to the first switch component 6 through the first output terminal group 13. During application, when the protection integrated module body 11 obtains an overcurrent phenomenon in the protection board circuit after calculating the voltage of the detection terminal group detected by the first input terminal group 12 and the first detection resistance value, the first output terminal group 13 controls the first switch component 6 to disconnect the protection board circuit to cut off the current, thereby avoiding damage to the load and battery cell components caused by overcurrent of the output current.

[0045] Optionally, the protection board circuit described in the present application also includes a battery cell temperature detection module 7; the fuel meter integrated module 2 includes a fuel meter integrated module body 21 and a second input terminal group 22, a third input terminal group 23, a fourth input terminal group 24 and a second output terminal group 25 arranged on the fuel meter integrated module body 21; the second input terminal group 22 is electrically connected to a detection terminal having a second detection resistance value; the third input terminal group 23 is used to electrically connect to the battery cell temperature detection module 7 to obtain the temperature condition of the battery cell assembly; the fourth input terminal group 24 is used to electrically connect to the battery cell assembly to obtain the voltage condition of the battery cell assembly; the fuel meter integrated module body 21 is used to detect the voltage of the detection terminal group having the second detection resistance value through the second input terminal group 22, and calculate and obtain the current condition in the protection board circuit in combination with the second detection resistance value, and output the current state in the protection board circuit, the temperature condition and the voltage condition of the battery cell assembly to the external component through the second output terminal group 25.

[0046] In an embodiment of the present application, the fuel gauge integrated module body 21 obtains the voltage of the corresponding detection terminal group, the voltage and temperature of the battery cell assembly through the second input terminal group 22, the third input terminal group 23, and the fourth input terminal group 24 respectively, and calculates the voltage of the detection terminal group, the voltage and temperature of the battery cell assembly to obtain the power status of the battery cell assembly, and outputs the calculated power status to the external component through the second output terminal group 25. Specifically, the external component can be a chip component in an electronic device equipped with the protection board circuit provided by the present application. The chip component obtains information such as the current state in the protection board circuit, the temperature state and voltage state of the battery cell assembly through the second output terminal group 25, and makes corresponding analysis to facilitate the user to use the electronic device.

[0047] For example, when a battery cell assembly overheats, the chip assembly of the electronic device obtains the overheating information of the battery cell assembly through the second output port 25, and displays an alarm through the display assembly of the electronic device, so that the user can handle it in time to avoid damage to the electronic device.

[0048] Optionally, the protection board circuit described in the present application also includes a battery cell protection integrated module 8, a fuse assembly 9 and a second switch assembly 10, and the battery cell protection integrated module 8 includes: a battery cell protection integrated module body 81 and a fifth input terminal group 82 and a third output terminal group 83 arranged on the battery cell protection integrated module body 81; the fifth input terminal group 82 is electrically connected to the power terminal 4; the third output terminal group 83 is electrically connected to the second switch assembly 10; the fuse assembly 9 is connected in series with the first switch assembly 6 in the protection board circuit; the second switch assembly 10 is electrically connected to the fuse assembly 9 and the power terminal 4; the battery cell protection integrated module body 81 is used to control the conduction or melting of the fuse assembly 9 based on the voltage of the battery cell assembly detected by the fifth input terminal group 82.

[0049] In an embodiment of the present application, the battery protection integrated module body 81 of the battery protection integrated module 8 is electrically connected to the power terminal 4 through the fifth input terminal group 82, and the third output terminal group 83 is electrically connected to the second switch component 10. When the battery protection integrated module body 81 detects that there is overcurrent or other abnormal phenomena in the output voltage of the battery component through the fifth input terminal group 82, the battery protection integrated module body 81 controls the second switch component 10 to be turned on through the third output terminal group 83, thereby causing the fuse component 9 to melt, thereby cutting off the protection board circuit and preventing damage to the battery component and the electronic equipment.

[0050] On the other hand, the present application also provides an electronic device, which includes any one of the protection board circuits described above.

[0051] In the application embodiment, an electronic device is also provided. It should be noted that the protection board circuit has the same structure as any of the protection board circuits described above, and its beneficial effects are also the same. The electronic device provided in this embodiment is provided with a precision resistor 3 with multiple detection terminals 31 on its protection board circuit, so that the protection integrated module 1 and the electricity meter integrated module 2 can share a precision resistor 3 for detection, which saves the space layout of the protection board circuit, reduces the overall size of the protection board, and also reduces the internal resistance of the protection board circuit, thereby reducing the heating phenomenon of the electronic device to a certain extent.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A protection board circuit, characterized in that: The protection board circuit comprises: a protection integrated module (1), an electric meter integrated module (2), and a precision resistor (3); The precision resistor (3) comprises a plurality of detection terminals (31), any two of the detection terminals (31) form a detection terminal group, and the detection terminal group has a detection resistance value; The protection integrated module (1) is electrically connected to a detection terminal (31) group having a first detection resistance value, and the electricity meter integrated module (2) is electrically connected to a detection terminal group having a second detection resistance value, wherein the first detection resistance value is not equal to the second detection resistance value.

2. The protection board circuit according to claim 1, characterized in that: The precision resistor (3) comprises a resistor body (32) and two electrodes (33), wherein the electrodes (33) and the detection terminal (31) are electrically connected to the resistor body (32) respectively; The two electrodes (33) are arranged on the resistor body (32) at intervals; The plurality of detection terminals (31) are arranged at intervals between the electrodes (33).

3. The protection board circuit according to claim 2, characterized in that: The resistor body (32) comprises a first end and a second end which are arranged in opposite directions along a first direction, two electrodes (33) are arranged at the first end and the second end respectively, and a plurality of detection terminals (31) are arranged at intervals between the two electrodes (33) along the first direction.

4. The protection board circuit according to claim 3, characterized in that: The spacing distance between two adjacent detection terminals (31) is greater than or equal to 0.15 mm.

5. The protection board circuit according to claim 2, characterized in that: The resistor body (32) comprises a protective layer (321), an alloy layer (322), an adhesive layer (323) and a substrate (324) which are sequentially arranged along a second direction; The adhesive layer (323) is used to fix the alloy layer (322) on the substrate (324); The detection terminal (31) and the electrode (33) are both arranged on the protective layer (321), and the detection terminal (31) and the electrode (33) are both electrically connected to the alloy layer (322).

6. The protection board circuit according to claim 1, characterized in that: The protection board circuit comprises a power terminal (4) and a load terminal (5); the power terminal (4) and the load terminal (5) are electrically connected; the power terminal (4) is used to be electrically connected to a battery cell assembly; the load terminal (5) is used to be electrically connected to a load; The precision resistor (3) is connected in series between the load terminal and the power terminal.

7. The protection board circuit according to claim 6, characterized in that: The protection integrated module (1) comprises: a protection integrated module body (11) and a first input terminal group (12) and a first output terminal group (13) arranged on the protection integrated module body (11); the first input terminal group (12) is electrically connected to a detection terminal group having a first detection resistance value; The protection board circuit also includes a first switch component (6), the first switch component (6) is connected in series between the load terminal and the power terminal, and the first switch component (6) is electrically connected to the first output terminal group (13); The protection integrated module body (11) is used to detect the voltage across the detection terminal group having the first detection resistance value through the first input terminal group (12), obtain the current condition in the protection board circuit in combination with the first detection resistance value analysis, and control the first switch component (6) to turn on or off the protection board circuit based on the current condition in the protection board circuit through the first output terminal group (13).

8. The protection board circuit according to claim 6, characterized in that: The protection board circuit also includes a battery core temperature detection module (7); The electric meter integrated module (2) comprises an electric meter integrated module body (21) and a second input terminal group (22), a third input terminal group (23), a fourth input terminal group (24) and a second output terminal group (25) arranged on the electric meter integrated module body (21); the second input terminal group (22) is electrically connected to a detection terminal group having a second detection resistance value; the third input terminal group (23) is used to electrically connect to the battery cell temperature detection module (7) to obtain the temperature condition of the battery cell assembly; the fourth input terminal group (24) is used to electrically connect to the battery cell assembly to obtain the voltage condition of the battery cell assembly; The electric meter integrated module body (21) is used to detect the voltage of the detection terminal group having the second detection resistance value through the second input terminal group (22), and obtain the current state in the protection board circuit in combination with the second detection resistance value, and output the current state in the protection board circuit, the temperature state and the voltage state of the battery cell assembly to the outside through the second output terminal group (25).

9. The protection board circuit according to claim 6, characterized in that: The protection board circuit also includes a cell protection integrated module (8), a fuse assembly (9) and a second switch assembly (10); the cell protection integrated module (8) includes: a cell protection integrated module body (81) and a fifth input terminal group (82) and a third output terminal group (83) arranged on the cell protection integrated module body (81); the fifth input terminal group (82) is electrically connected to the power terminal (4); the third output terminal group (83) is electrically connected to the second switch assembly (10); The fuse assembly (9) is connected in series in the protection board circuit; The second switch assembly (10) is electrically connected to the fuse assembly (9) and the power terminal; The cell protection integrated module body (81) is used to control the conduction or disconnection of the second switch component (10) based on the voltage of the cell detected by the fifth input terminal group (82), thereby controlling the conduction or disconnection of the fuse component (9).

10. An electronic device, characterized in that: The electronic device comprises the protection board circuit according to any one of claims 1 to 9.

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