Temperature detection circuit, battery cell control circuit and electronic equipment

Abstract

The utility model discloses a temperature detection circuit, a cell control circuit and an electronic device. The temperature detection circuit comprises a first temperature detection module and a second temperature detection module. The first temperature detection module is arranged close to the battery cell or connected with the battery cell and is used for being connected with the main control chip and outputting a first temperature detection signal to the main control chip, so that the main control chip controls the discharging process of the battery cell according to the first temperature detection signal; and the second temperature detection module is arranged close to the battery cell or connected with the battery cell, and is used for being connected with the charging control chip and outputting a second temperature detection signal to the charging control chip, so that the charging control chip controls the charging process of the battery cell according to the second temperature detection signal. The temperature detection circuit can respectively carry out dual-channel temperature detection on the temperature of the battery cell during discharging and charging, the main control chip can directly collect and detect the temperature of the battery cell during discharging, and errors generated in the signal transmission process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cells, and in particular to a temperature detection circuit, a battery cell control circuit and an electronic device. Background Art

[0002] Lithium batteries play a vital role in our daily lives, and their safety is crucial during actual use. During charging and discharging, batteries generate heat, especially when operating at high currents or in harsh environments. Operating at high temperatures for extended periods can shorten their service life. Strong exothermic reactions can cause sudden temperature increases, leading to thermal runaway and potentially fires or explosions. Therefore, high-precision monitoring of battery charge and discharge temperatures is essential.

[0003] In the existing technology, an NTC thermistor is usually connected to the charging control chip to detect the battery cell temperature in real time. However, due to other factors such as additional impedance and ADC acquisition error in actual use, the charging control chip cannot accurately collect the resistance change of the NTC thermistor, and the temperature detection effect cannot be very accurate. Utility Model Content

[0004] The embodiments of the present invention provide a temperature detection circuit, a battery cell control circuit, and an electronic device to solve the problem that the temperature detection scheme in the prior art is not accurate enough.

[0005] The embodiment of the utility model provides a temperature detection circuit, comprising a first temperature detection module and a second temperature detection module;

[0006] The first temperature detection module is arranged near the battery cell or connected to the battery cell, and is used to be connected to the main control chip and output a first temperature detection signal to the main control chip, so that the main control chip controls the discharge process of the battery cell according to the first temperature detection signal;

[0007] The second temperature detection module is arranged near the battery cell or connected to the battery cell, and is used to be connected to the charging control chip to output a second temperature detection signal to the charging control chip so that the charging control chip controls the charging process of the battery cell according to the second temperature detection signal.

[0008] Preferably, the first temperature detection module includes a temperature sensor;

[0009] The temperature sensor is arranged close to the battery cell or connected to the battery cell, and is used to be connected to the main control chip to output a first temperature detection signal to the main control chip.

[0010] Preferably, the first temperature detection module further includes a power supply unit;

[0011] The first end of the power supply unit is connected to the first end of the battery cell, the second end of the power supply unit is connected to the second end of the battery cell, and the third end of the power supply unit is connected to the temperature sensor for supplying power to the temperature sensor.

[0012] Preferably, the power supply unit includes a first resistor and a second resistor;

[0013] The first resistor and the second resistor are arranged in series between the first end and the second end of the battery cell;

[0014] The temperature sensor is connected to a connection node between the first resistor and the second resistor.

[0015] Preferably, the first temperature detection module further includes a current limiting resistor;

[0016] The first end of the current limiting resistor is connected to the temperature sensor, and the second end of the current limiting resistor is connected to the main control chip.

[0017] Preferably, the first temperature detection module further includes a voltage regulator tube;

[0018] The first end of the voltage-stabilizing tube is connected to the connection node between the temperature sensor and the main control chip, and the second end of the voltage-stabilizing tube is grounded.

[0019] Preferably, the second temperature detection module includes a thermistor;

[0020] The thermistor is arranged close to the battery cell, a first end of the thermistor is used to be connected to the charging control chip, and a second end of the thermistor is grounded and used to output a second temperature detection signal to the charging control chip.

[0021] Preferably, the second temperature detection module further includes a filter capacitor;

[0022] A first end of the filter capacitor is connected to a connection node between the thermistor and the charging control chip, and a second end of the filter capacitor is grounded.

[0023] The embodiment of the present utility model further provides a battery cell control circuit, comprising a main control chip, a charging control chip and any one of the temperature detection circuits described above;

[0024] The main control chip is connected to the first temperature detection module, and is used to connect to the battery cell, and control the discharge process of the battery cell according to the first temperature detection signal output by the first temperature detection module;

[0025] The charging control chip is connected to the second temperature detection module and is used to connect to the battery cell, and controls the charging process of the battery cell according to the second temperature detection signal output by the second temperature detection module.

[0026] An embodiment of the present utility model provides an electronic device, comprising a battery cell and the battery cell control circuit described above;

[0027] The battery cell control circuit is connected to the battery cell and is used to control the charging process or the discharging process of the battery cell.

[0028] The temperature detection circuit, battery cell control circuit and electronic device provided by the embodiments of the present utility model adopt a first temperature detection module and a second temperature detection module to perform dual-channel temperature detection on the temperature of the battery cell during discharge and charging, respectively. The main control chip connected to the first temperature detection module can directly collect and detect the temperature of the battery cell during discharge, reducing the error generated during signal transmission, improving the detection accuracy, and ensuring the effect of temperature detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 This is a circuit diagram of a cell control circuit in one embodiment of the present invention;

[0031] Figure 2 This is another circuit diagram of the battery cell control circuit in one embodiment of the present invention.

[0032] In the figure: 1. First temperature detection module; 11. Temperature sensor; 12. Power supply unit; 2. Second temperature detection module; 3. Main control chip; 4. Charging control chip; 5. Battery cell. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0035] It should be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" another element or layer, it may be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part.

[0036] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the drawings is flipped, then the elements or features described as "under" or "beneath" or "beneath" the other elements will be oriented as "over" the other elements or features. Thus, the exemplary terms "under" and "under" may include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0037] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention. When used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0038] In order to fully understand the present invention, the following description will provide detailed structures and steps to illustrate the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementation methods.

[0039] An embodiment of the present utility model provides a temperature detection circuit, including a first temperature detection module 1 and a second temperature detection module 2; the first temperature detection module 1 is arranged near the battery cell 5 or connected to the battery cell 5, and is used to be connected to the main control chip 3, outputting a first temperature detection signal to the main control chip 3, so that the main control chip 3 controls the discharge process of the battery cell 5 according to the first temperature detection signal; the second temperature detection module 2 is arranged near the battery cell 5 or connected to the battery cell 5, and is used to be connected to the charging control chip 4, outputting a second temperature detection signal to the charging control chip 4, so that the charging control chip 4 controls the charging process of the battery cell 5 according to the second temperature detection signal.

[0040] As an example, the temperature detection circuit includes a first temperature detection module 1 and a second temperature detection module 2. The first temperature detection module 1 and the second temperature detection module 2 can be placed near the battery cell 5 or connected to the outer surface of the battery cell 5 to detect the temperature of the battery cell 5. The first temperature detection module 1 is connected to the main control chip 3 in the battery cell control circuit and can output a first temperature detection signal to the main control chip 3 based on the temperature of the battery cell 5, so that the main control chip 3 controls the discharge action of the battery cell 5 based on the first temperature detection signal. For example, the first temperature detection module 1 can output a first temperature detection signal to the main control chip 3 when the temperature of the battery cell 5 is greater than a preset temperature. The main control chip 3 detects the first temperature detection signal and controls the battery cell 5 to stop discharging. When the temperature of the battery cell 5 drops to no greater than the preset temperature, the first temperature detection module 1 no longer outputs the first temperature detection signal to the main control chip 3, and the main chip 3 controls the battery cell 5 to discharge normally. Alternatively, the first temperature detection module 1 outputs a voltage or current signal corresponding to the temperature value to the main control chip 3 based on the temperature of the battery cell 5, that is, the first temperature detection signal. The main chip 3 detects the voltage or current signal and controls the battery cell 5 to stop discharging when it detects that the voltage or current signal exceeds a preset range. When it detects that the voltage or current signal is within the preset range, it controls the battery cell 5 to discharge normally. The second temperature detection module 2 is connected to the charging control chip 4 in the battery cell control circuit and can output a second temperature detection signal to the charging control chip 4 based on the temperature of the battery cell 5, so that the charging control chip 4 controls the charging action of the battery cell 5. For example, the second temperature detection module 2 can output a second temperature detection signal to the charging control chip 4 when the temperature of the battery cell 5 is greater than a preset temperature. The charging control chip 4 detects the second temperature detection signal, that is, cuts off the connection between the external power supply and the battery cell 5, so that the external power supply stops charging the battery cell 5. When the temperature of the battery cell 5 drops to no more than the preset temperature, the second temperature detection module 2 no longer outputs the second temperature detection signal to the charging control chip 4, and the charging control chip 4 controls the external power supply to charge the battery cell 5 normally; or, the second temperature detection module 2 outputs a voltage or current signal corresponding to the temperature value to the charging control chip 4 according to the temperature of the battery cell 5, that is, the second temperature detection signal. The charging control chip 4 detects the voltage or current signal. When it is detected that the voltage or current signal exceeds the preset range, the connection between the external power supply and the battery cell 5 is cut off, so that the external power supply stops charging the battery cell 5. When it is detected that the voltage or current signal is within the preset range, the charging control chip 4 controls the external power supply to charge the battery cell 5 normally.

[0041] In this example, a first temperature detection module 1 and a second temperature detection module 2 are used to perform dual-channel temperature detection on the temperature of the battery cell 5 during discharge and charging, respectively. The main control chip 3 connected to the first temperature detection module 1 can directly collect and detect the temperature of the battery cell 5 during discharge, reducing the error generated during signal transmission, improving the detection accuracy, and ensuring the effect of temperature detection.

[0042] In one embodiment, the first temperature detection module 1 includes a temperature sensor 11 ; the temperature sensor 11 is disposed near the battery cell 5 or connected to the battery cell 5 , and is configured to be connected to the main control chip 3 to output a first temperature detection signal to the main control chip 3 .

[0043] As an example, the first temperature detection module 1 includes a temperature sensor 11, which can be a contact or non-contact temperature sensor with high detection accuracy. When the temperature sensor 11 is a non-contact temperature sensor, such as an infrared temperature sensor, the temperature sensor 11 is arranged close to the battery cell 5, and detects the temperature of the battery cell 5 by detecting the electromagnetic waves radiated by the battery cell 5, forms a first temperature detection signal, and sends it to the main control chip 3; when the temperature sensor 11 is a contact temperature sensor, such as a thermocouple temperature sensor, the temperature sensor 11 is connected to the outer casing of the battery cell 5, and forms a first temperature detection signal by detecting the surface temperature of the battery cell 5, and sends it to the main control chip 3.

[0044] In this example, the temperature sensor 11 is used to collect the first temperature detection signal and send it directly to the main control chip 3, which can improve the detection accuracy and avoid the accuracy error caused by long-distance signal transmission when used in high current or harsh environment, thereby ensuring the effect of temperature detection.

[0045] In one embodiment, the first temperature detection module 1 also includes a power supply unit 12; the first end of the power supply unit 12 is connected to the first end of the battery cell 5, the second end of the power supply unit 12 is connected to the second end of the battery cell 5, and the third end of the power supply unit 12 is connected to the temperature sensor 11 for supplying power to the temperature sensor 11.

[0046] As an example, the first temperature detection module 1 also includes a power supply unit 12 for providing a power supply voltage for the first temperature detection module 1. The first end of the power supply unit 12 is connected to the first end of the battery cell 5, that is, the positive output interface B+ of the battery cell 5. The second end of the power supply unit 12 is connected to the second end of the battery cell 5, that is, the negative output interface B- of the battery cell 5. The third end of the power supply unit 12 is connected to the temperature sensor 11, which is used to draw power from the battery cell 5 and use the electric energy stored in the battery cell 5 to power the first temperature detection module 1. There is no need to set up an additional power module for the first temperature detection module 1.

[0047] In one embodiment, the power supply unit 12 includes a first resistor R1 and a second resistor R2; the first resistor R1 and the second resistor R2 are arranged in series between the first end and the second end of the battery cell 5; and the temperature sensor 11 is connected to the connection node between the first resistor R1 and the second resistor R2.

[0048] As an example, the power supply unit 12 includes a first resistor R1 and a second resistor R2. The first resistor R1 and the second resistor R2 are arranged in series between the positive output interface B+ and the negative output interface B- of the battery cell 5. The temperature sensor 11 is connected to the connection node between the first resistor R1 and the second resistor R2. The first resistor R1 and the second resistor R2 constitute a voltage divider circuit for dividing the voltage output by the battery cell 5 and converting it into a voltage usable by the first temperature detection module 1. The voltage input to the first temperature detection module 1 is equal to the voltage across the second resistor R2.

[0049] In one embodiment, the first temperature detection module 1 further includes a current limiting resistor R3 ; a first end of the current limiting resistor R3 is connected to the temperature sensor 11 , and a second end of the current limiting resistor R3 is connected to the main control chip 3 .

[0050] As an example, the first temperature detection module 1 further includes a current limiting resistor R3 , a first end of which is connected to the temperature sensor 11 , and a second end of which is connected to the DQ pin of the main control chip 3 , for limiting the current input to the main control chip 3 .

[0051] In one embodiment, the first temperature detection module 1 further includes a voltage regulator tube D1 ; a first end of the voltage regulator tube D1 is connected to the connection node between the temperature sensor 11 and the main control chip 3 , and a second end of the voltage regulator tube D1 is grounded.

[0052] As an example, the first temperature detection module 1 further includes a voltage regulator diode D1. A first end of the voltage regulator diode D1 is connected to the junction between the temperature sensor 11 and the current-limiting resistor R3, and a second end of the voltage regulator diode D1 is grounded. The voltage regulator diode D1 is used to clamp the voltage input to the main control chip 3. The current-limiting resistor R3 is connected in series with the voltage regulator diode D1 to act as a voltage divider, ensuring that the voltage input to the main control chip 3 meets the requirements of the main control chip 3 and providing a more stable input voltage.

[0053] In one embodiment, the second temperature detection module 2 includes a thermistor R4; the thermistor R4 is arranged close to the battery cell 5, the first end of the thermistor R4 is used to be connected to the charging control chip 4, and the second end of the thermistor R4 is grounded for outputting a second temperature detection signal to the charging control chip 4.

[0054] As an example, the second temperature detection module 2 includes a thermistor R4. The thermistor R4 is arranged near the battery cell 5 or connected to the battery cell 5 housing. The first end of the thermistor R4 is connected to the NTC pin of the charging control chip 4 in the battery cell control circuit, and the second end of the thermistor R4 is grounded. The thermistor R4 can change its own resistance according to the change of the ambient temperature, thereby changing the current or voltage input to the charging control chip 4, forming a second temperature detection signal input to the charging control chip 4, so that the charging control chip 4 controls the external power supply to charge or not charge the battery cell 5 according to the second temperature detection signal.

[0055] In one embodiment, the second temperature detection module 2 further includes a filter capacitor C1 ; a first end of the filter capacitor C1 is connected to a connection node between the thermistor R4 and the charging control chip 4 , and a second end of the filter capacitor C1 is grounded.

[0056] As an example, the second temperature detection module 2 further includes a filter capacitor C1. A first end of the filter capacitor C1 is connected to the connection node between the thermistor R4 and the charging control chip 4, and a second end of the filter capacitor C1 is grounded. The filter capacitor C1 is used to filter out noise signals and make the second temperature detection signal input to the charging control chip 4 more stable.

[0057] An embodiment of the present utility model also provides a battery cell control circuit, including a main control chip 3, a charging control chip 4 and a temperature detection circuit in any of the above embodiments; the main control chip 3 is connected to the first temperature detection module 1, and is used to connect to the battery cell 5, and control the discharge process of the battery cell 5 according to the first temperature detection signal output by the first temperature detection module 1; the charging control chip 4 is connected to the second temperature detection module 2, and is used to connect to the battery cell 5, and control the charging process of the battery cell 5 according to the second temperature detection signal output by the second temperature detection module 2.

[0058] As an example, the cell control circuit includes a main control chip 3, a charging control chip 4, and a temperature detection circuit as described in any of the above examples. The charging control chip 4 is connected to the cell 5 and is used to control and manage the charging process of the cell 5. It can detect the charging current and charging voltage in real time and provide charging protection for the cell 5. The main control chip 3 is connected to the cell 5 and is used to control and manage the charging and discharging process of the cell 5. The main control chip 3 is connected to the first temperature detection module 1 and is also connected to the cell 5 via a first switch Q1. The first end of the first switch Q1 is connected to the cell 5, and the second end of the first switch Q1 is connected to the load circuit. The control end of the first switch Q1 is connected to the main control chip 3. Based on the first temperature detection signal output by the first temperature detection module 1, the main control chip 3 can output a first control signal to the first switch Q1 to turn off the first switch Q1, thereby stopping the discharge of the cell 5. Alternatively, based on the first temperature detection signal, the main control chip 3 can output a second control signal to the first switch Q1 to turn on the first switch Q1, thereby restarting the discharge of the cell 5. The charging control chip 4 is connected to the second temperature detection module 2 and can also be connected to the battery cell 5 through the second switch tube Q2. The first end of the second switch tube Q2 is connected to the battery cell 5, and the second end of the second switch tube Q2 is used to connect to the external power supply. The control end of the second switch tube Q2 is connected to the charging control chip 4, and is used to control the second switch tube Q2 to turn off according to the second temperature detection signal output by the second temperature detection module 2, so that the external power supply stops charging the battery cell 5, or, according to the second temperature detection signal output by the second temperature detection module 2, control the second switch tube Q2 to turn on, so that the external power supply charges the battery cell 5.

[0059] In this example, the temperature detection circuit uses a first temperature detection module 1 and a second temperature detection module 2 to perform dual-channel temperature detection on the temperature of the battery cell 5 during discharge and charging, respectively. The main control chip 3 connected to the first temperature detection module 1 can directly collect and detect the temperature of the battery cell 5 during discharge, reducing the error generated during signal transmission, improving the detection accuracy, and ensuring the effect of temperature detection.

[0060] An embodiment of the present utility model further provides an electronic device, comprising a battery cell 5 and the battery cell control circuit in the above embodiment; the battery cell control circuit is connected to the battery cell 5 and is used to control the charging or discharging of the battery cell 5 .

[0061] As an example, the electronic device includes a battery cell 5 and the battery cell control circuit in the above example. The battery cell control circuit is connected to the battery cell 5 and is used to control the charging process or the discharging process of the battery cell 5. In this example, the temperature detection circuit uses a first temperature detection module 1 and a second temperature detection module 2 to perform dual-channel temperature detection on the temperature of the battery cell 5 during discharge and charging, respectively. The main control chip 3 connected to the first temperature detection module 1 can directly collect and detect the temperature of the battery cell 5 during discharge, reducing the error generated during signal transmission, improving the detection accuracy, and ensuring the effect of temperature detection.

[0062] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A temperature detection circuit, characterized in that: comprising a first temperature detection module and a second temperature detection module; The first temperature detection module is arranged near the battery cell or connected to the battery cell, and is used to be connected to the main control chip and output a first temperature detection signal to the main control chip, so that the main control chip controls the discharge process of the battery cell according to the first temperature detection signal; The second temperature detection module is arranged near the battery cell or connected to the battery cell, and is used to be connected to the charging control chip and output a second temperature detection signal to the charging control chip, so that the charging control chip controls the charging process of the battery cell according to the second temperature detection signal; The first temperature detection module and the second temperature detection module respectively perform dual-channel temperature detection on the temperature of the battery cell during discharge and charge.

2. The temperature detection circuit according to claim 1, wherein: The first temperature detection module includes a temperature sensor; The temperature sensor is arranged close to the battery cell or connected to the battery cell, and is used to be connected to the main control chip to output a first temperature detection signal to the main control chip.

3. The temperature detection circuit according to claim 2, wherein: The first temperature detection module further includes a power supply unit; The first end of the power supply unit is connected to the first end of the battery cell, the second end of the power supply unit is connected to the second end of the battery cell, and the third end of the power supply unit is connected to the temperature sensor for supplying power to the temperature sensor.

4. The temperature detection circuit according to claim 3, wherein: The power supply unit includes a first resistor and a second resistor; The first resistor and the second resistor are arranged in series between the first end and the second end of the battery cell; The temperature sensor is connected to a connection node between the first resistor and the second resistor.

5. The temperature detection circuit according to claim 2, wherein: The first temperature detection module further includes a current limiting resistor; The first end of the current limiting resistor is connected to the temperature sensor, and the second end of the current limiting resistor is connected to the main control chip.

6. The temperature detection circuit according to claim 2, wherein: The first temperature detection module further includes a voltage regulator tube; The first end of the voltage-stabilizing tube is connected to the connection node between the temperature sensor and the main control chip, and the second end of the voltage-stabilizing tube is grounded.

7. The temperature detection circuit according to claim 1, wherein: The second temperature detection module includes a thermistor; The thermistor is arranged close to the battery cell, a first end of the thermistor is used to be connected to the charging control chip, and a second end of the thermistor is grounded and used to output a second temperature detection signal to the charging control chip.

8. The temperature detection circuit according to claim 7, characterized in that: The second temperature detection module further includes a filter capacitor; A first end of the filter capacitor is connected to a connection node between the thermistor and the charging control chip, and a second end of the filter capacitor is grounded.

9. A cell control circuit, characterized in that: It comprises a main control chip, a charging control chip and the temperature detection circuit according to any one of claims 1 to 8; The main control chip is connected to the first temperature detection module, and is used to connect to the battery cell, and control the discharge process of the battery cell according to the first temperature detection signal output by the first temperature detection module; The charging control chip is connected to the second temperature detection module and is used to connect to the battery cell, and controls the charging process of the battery cell according to the second temperature detection signal output by the second temperature detection module.

10. An electronic device, characterized in that: comprising a battery cell and the battery cell control circuit according to claim 9; The battery cell control circuit is connected to the battery cell and is used to control the charging process or the discharging process of the battery cell.

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