Battery with heating module failure detection function

Abstract

The utility model discloses a battery with a heating module failure detection function. Comprising a battery monomer, a control module, a heating module, a switch module, a heating monitoring module and a switch driving module, the heating module and the switch module are connected in series between the positive electrode end and the negative electrode end of the battery monomer; the output end of the switch driving module is connected with the control end of the switch module, and when the switch module is in a conducting state, the heating module is enabled to heat the battery monomers; the heating monitoring module is connected with the two ends of the heating module respectively, the output end of the heating monitoring module is connected with the control module, and the heating monitoring module is configured to output a monitoring signal representing the working state of the heating module; the control module is configured to determine whether the heating module fails or not according to the monitoring signal and the switch control signal. According to the embodiment, whether heating failure exists in the heating module in the using process or not is detected in real time, and the reliability of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery management technology, and in particular to a battery with a heating module failure detection function. Background Technology

[0002] With the widespread use of lithium batteries, the reliability requirements for lithium batteries during use are becoming increasingly stringent. In certain application scenarios, such as in low-temperature environments, heating modules are needed to heat the lithium batteries to ensure their normal operation and reliability.

[0003] However, the heating module may fail during use, which could damage the battery and control circuit. Utility Model Content

[0004] This invention provides a battery with a heating module failure detection function to detect whether the heating module has failed during use in real time, thereby improving the reliability of the battery.

[0005] According to one aspect of the present invention, a battery is provided, comprising: a battery cell, a control module, a heating module, a switch module, a heating monitoring module, and a switch drive module;

[0006] The heating module and the switching module are connected in series between the positive terminal and the negative terminal of the battery cell;

[0007] The output terminal of the switch drive module is connected to the control terminal of the switch module and is configured to control the on / off state of the switch module according to the switch control signal input to its own input terminal, and when the switch module is in the on state, the heating module is enabled to heat the battery cell; the on / off state of the switch module includes the on state.

[0008] The heating monitoring module is connected to both ends of the heating module, and the output end of the heating monitoring module is connected to the control module. The heating monitoring module is configured to output a monitoring signal that characterizes the working status of the heating module.

[0009] The control module is connected to the input terminal of the switch drive module, and the control module is configured to determine whether the heating module has failed based on the monitoring signal and the switch control signal.

[0010] Optionally, the battery further includes a protection module and a protection drive module, wherein the protection module is connected between the heating module and the positive terminal of the battery cell;

[0011] The control module is connected to the input terminal of the protection drive module. The control module is also configured to send a protection control signal to the protection drive module in response to determining that the heating module has failed, so that the protection drive module drives the protection module to enable.

[0012] Optionally, the protection module includes a first resistor and a fuse, wherein a first end of the first resistor is connected to the output terminal of the protection drive module, and a second end of the first resistor is connected to the fuse.

[0013] The fuse is also connected between the heating module and the positive terminal of the battery cell.

[0014] Optionally, the heating monitoring module includes: a second resistor, an optocoupler unit, a third resistor, and a fourth resistor;

[0015] The first end of the second resistor is connected to one end of the heating module, the second end of the second resistor is connected to the first input end of the optocoupler unit, and the second input end of the optocoupler unit is connected to the other end of the heating module;

[0016] The first output terminal of the optocoupler unit is connected to a first potential, the second output terminal of the optocoupler unit is connected to the first terminal of the third resistor and the first terminal of the fourth resistor respectively, the second terminal of the third resistor is connected to the control module, and the second terminal of the fourth resistor is connected to ground potential.

[0017] The current flows from the first input terminal of the optocoupler to the second input terminal of the optocoupler.

[0018] Optionally, the heating monitoring module further includes a first diode, the positive terminal of which is connected to the second input terminal of the optocoupler unit, and the negative terminal of which is connected to the first input terminal of the optocoupler unit.

[0019] Optionally, the protection drive module includes: a first transistor, a second transistor, and a third transistor;

[0020] The first terminal of the first transistor is connected to the positive terminal of the battery cell, the second terminal of the first transistor is connected to the gate of the second transistor, and the gate of the first transistor is connected to the first terminal of the third transistor.

[0021] The first terminal of the second transistor is connected to the protection module, and the second terminal of the second transistor is connected to the negative terminal of the battery cell;

[0022] The second terminal of the third transistor is connected to ground potential, and the gate of the third transistor is connected to the control module.

[0023] Optionally, the protection drive module further includes: a first Zener diode, a fifth resistor, a second Zener diode, a sixth resistor, and a seventh resistor;

[0024] The first end of the fifth resistor is connected to the first terminal of the first transistor, the second end of the fifth resistor is connected to the gate of the first transistor, the positive terminal of the first Zener diode is connected to the gate of the first transistor, and the negative terminal of the first Zener diode is connected to the first terminal of the first transistor.

[0025] The first end of the sixth resistor is connected to the gate of the second transistor, the second end of the sixth resistor is connected to the second terminal of the second transistor, the positive terminal of the second Zener diode is connected to the second terminal of the second transistor, and the negative terminal of the second Zener diode is connected to the gate of the second transistor.

[0026] The first end of the seventh resistor is connected to the gate of the third transistor, and the second end of the seventh resistor is connected to the second terminal of the third transistor.

[0027] Optionally, the switch driving module includes: a fourth transistor, a fifth transistor, and a second diode;

[0028] The first terminal of the fourth transistor is connected to the positive terminal of the battery cell, the second terminal of the fourth transistor is connected to the positive terminal of the second diode, and the gate of the fourth transistor is connected to the first terminal of the fifth transistor.

[0029] The negative terminal of the second diode is connected to the control terminal of the switching module;

[0030] The second terminal of the fifth transistor is connected to ground potential, and the gate of the fifth transistor is connected to the control module.

[0031] Optionally, the switch driving module further includes: a third Zener diode, an eighth resistor, and a ninth resistor;

[0032] The first terminal of the eighth resistor is connected to the first terminal of the fourth transistor, the second terminal of the eighth resistor is connected to the gate of the fourth transistor, the positive terminal of the third Zener diode is connected to the gate of the fourth transistor, and the negative terminal of the third Zener diode is connected to the first terminal of the fourth transistor.

[0033] The first end of the ninth resistor is connected to the gate of the fifth transistor, and the second end of the ninth resistor is connected to the second terminal of the fifth transistor.

[0034] This embodiment of the invention establishes heating monitoring modules at both ends of the heating module to monitor its operating status and output different monitoring signals based on different operating states. The control module determines that the heating module has failed when the switch control signal indicates the switch is on and the monitoring signal indicates the heating module is not enabled; conversely, it determines that the heating module has failed when the switch control signal indicates the switch is off and the monitoring signal indicates the heating module is enabled. By using the monitoring signals output by the heating monitoring modules and the switch control signals to determine whether the heating module has failed in real time, appropriate measures can be taken promptly when the heating module fails to prevent damage to other components in the battery and improve battery reliability.

[0035] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the structure of a battery with a heating module failure detection function provided in this embodiment of the present invention;

[0038] Figure 2 A schematic diagram of another battery with heating module failure detection function provided in this embodiment of the present invention;

[0039] Figure 3 A schematic diagram of another battery with heating module failure detection function provided in this embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of another battery with a heating module failure detection function provided in an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Figure 1 This is a schematic diagram of the structure of a battery with a heating module failure detection function provided in an embodiment of the present invention. (Refer to...) Figure 1 The battery includes: a battery cell 10, a control module 11, a heating module 12, a switch module 13, a heating monitoring module 14, and a switch drive module 15;

[0044] The heating module 12 and the switch module 13 are connected in series between the positive terminal B+ and the negative terminal B- of the battery cell 10;

[0045] The output terminal of the switch drive module 15 is connected to the control terminal of the switch module 13 and is configured to control the on / off state of the switch module 13 according to the switch control signal input to its own input terminal, and when the switch module 13 is in the on state, the heating module 12 is enabled to heat the battery cell 10; the on / off state of the switch module 13 includes the on state and the off state.

[0046] The heating monitoring module 14 is connected to both ends of the heating module 12, and the output end of the heating monitoring module 14 is connected to the control module 11. The heating monitoring module 14 is configured to output a monitoring signal that characterizes the working status of the heating module 12.

[0047] The control module 11 is connected to the input terminal of the switch drive module 15. The control module 11 is configured to determine whether the heating module 12 has failed based on the monitoring signal and the switch control signal.

[0048] In this embodiment, the battery cell 10 can be a lithium battery; in other embodiments, it can be other types of batteries, and this embodiment does not specifically limit it. The heating module 12 can be a heating film, and can use a PTC heating element, resistance wire, or other devices that can generate heat for heating. The switching module 13 can be one of a field-effect transistor, a transistor, or a relay. The switching module 13 turns on or off in response to a signal at its control terminal. When the heating module 12 and the switching module 13 are connected in series between the positive terminal B+ and the negative terminal B- of the battery cell 10, they can be connected sequentially between the positive terminal B+ and the negative terminal B- of the battery cell 10, or they can be connected sequentially between the positive terminal B+ and the negative terminal B- of the battery cell 10. In this embodiment, the heating module 12 and the switching module 13 are connected sequentially between the positive terminal B+ and the negative terminal B- of the battery cell 10 as an example.

[0049] The switch control signal can be generated by the battery management system connected to the battery cell 10. The switch control signal includes an on signal and an off signal. When the battery management system determines that the battery cell 10 needs to be heated, it sends an on signal to the input terminal IN of the switch drive module 15, so that the switch drive module 15 controls the switch module 13 to be turned on. When the switch module 13 is in the on state, the two ends of the heating module 12 are connected to the positive terminal B+ and the negative terminal B- of the battery cell 10, respectively. The heating module 12 is enabled and in the heating state, starting to heat the battery cell 10. When the battery management system determines that the battery cell 10 does not need to be heated, it sends an off signal to the input terminal IN of the switch drive module 15, so that the switch drive module 15 controls the switch module 13 to be turned off. When the switch module 13 is in the off state, the heating module 12 is not enabled and is in the unheated state, not heating the battery cell 10.

[0050] Optionally, the monitoring signals include heat generation signals and no heat generation signals. When the heating monitoring module 14 detects that the heating module 12 is in a heating state, it outputs a heat generation signal. When the heating monitoring module 14 detects that the heating module 12 is in a non-heating state, it outputs a no heat generation signal.

[0051] The control module 11 can be an MCU, configured to receive monitoring signals and switch control signals. When the received switch control signal is an ON signal and the monitoring signal is a no-heat signal, it indicates that the switch module 13 is ON but the heating module 12 is not enabled, confirming that the heating module 12 is faulty and cannot properly heat the battery cell 10. When the control module 11 receives an ON signal and the monitoring signal is a heat-generating signal, it indicates that the switch module 13 is ON and the heating module 12 is enabled, confirming that the heating module 12 is not faulty and can properly heat the battery cell 10. When the control module 11 receives an OFF signal and the monitoring signal is a heat-generating signal, it indicates that the switch module 13 is OFF and the heating module 12 is enabled, confirming that the heating module 12 is faulty and remains in a heating state when heating should end. When the control module 11 receives an OFF signal and the monitoring signal is a no-heat-generating signal, it indicates that the switch module 13 is OFF and the heating module 12 is not enabled, confirming that the heating module 12 is not faulty.

[0052] This embodiment of the invention establishes heating monitoring modules at both ends of the heating module to monitor its operating status and output different monitoring signals based on different operating states. The control module determines that the heating module has failed when the switch control signal indicates the switch is on and the monitoring signal indicates the heating module is not enabled; conversely, it determines that the heating module has failed when the switch control signal indicates the switch is off and the monitoring signal indicates the heating module is enabled. By using the monitoring signals output by the heating monitoring modules and the switch control signals to determine whether the heating module has failed in real time, appropriate measures can be taken promptly when the heating module fails to prevent damage to other components in the battery and improve battery reliability.

[0053] Figure 2 This is a schematic diagram of another battery with heating module failure detection function provided by an embodiment of the present invention. Based on the above embodiment, referencing... Figure 2 The battery also includes a protection module 16 and a protection drive module 17, wherein the protection module 16 is connected between the heating module 12 and the positive terminal B+ of the battery cell 10;

[0054] The control module 11 is connected to the input terminal of the protection drive module 17. The control module 11 is also configured to send a protection control signal to the protection drive module 17 in response to determining that the heating module 12 has failed, so that the protection drive module 17 drives the protection module 16 to enable.

[0055] The protection module 16 may include short-circuit protection devices such as fuses. When the control module 11 determines that the heating module 12 has failed, it outputs a protection control signal to the protection drive module 17 so that the protection module 16 can be enabled by the protection drive module 17. When the protection module 16 is enabled, the connection between the heating module 12 and the positive terminal B+ of the battery cell 10 is cut off to prevent the heating module 12 from continuing to heat and causing damage to other components in the battery when the heating module 12 fails.

[0056] In one alternative implementation, such as Figure 2 As shown, the protection module 16 includes a first resistor R1 and a fuse F1. The first end of the first resistor R1 is connected to the output end of the protection drive module 17, and the second end of the first resistor R1 is connected to the fuse F1.

[0057] The fuse F1 is also connected between the heating module 12 and the positive terminal B+ of the battery cell 10.

[0058] Fuse F1 is connected in series between the positive terminal B+ of battery cell 10 and the first terminal of heating module 12. The second terminal of heating module 12 is connected to switch module 13. The second terminal of first resistor R1 is connected to the middle node of fuse F1, where fuse F1 can be a fusible link. When protection module 16 is enabled, current flows through first resistor R1. Specifically, control module 11 is also configured to send a protection control signal to protection drive module 17 in response to determining that heating module 12 has failed, so that a current flow path is formed between protection drive module 17, first resistor R1, fuse F1, and battery cell 10. Current flows through first resistor R1, and first resistor R1 melts fuse F1 through heating. If protection module 16 only includes fuse F1, directly melting fuse F1 through short-circuit current could easily cause the fuse housing to explode. In this embodiment, the protection module 16 includes a first resistor R1 and a fuse F1. The first resistor R1 is heated by the continuous flow of current, which melts the fuse F1, preventing the outer casing of the fuse from cracking and improving the safety of the battery.

[0059] Figure 3 This is a schematic diagram of another battery with heating module failure detection function provided by an embodiment of the present invention. Based on any of the above embodiments, refer to... Figure 3 The heating monitoring module 14 includes: a second resistor R2, an optocoupler unit 141, a third resistor R3, and a fourth resistor R4;

[0060] The first end of the second resistor R2 is connected to one end of the heating module 12, i.e., the first end; the second end of the second resistor R2 is connected to the first input end of the optocoupler unit 141; and the second input end of the optocoupler unit 141 is connected to the other end of the heating module 12, i.e., the second end.

[0061] The first output terminal of the optocoupler unit 141 is connected to the first potential VCC. The second output terminal of the optocoupler unit 141 is connected to the first terminal of the third resistor R3 and the first terminal of the fourth resistor R4, respectively. The second terminal of the third resistor R3 is connected to the control module 11. The second terminal of the fourth resistor R4 is connected to the ground potential GND. The first potential VCC is greater than the ground potential GND.

[0062] The current flows from the first input terminal of the optocoupler unit 141 to the second input terminal of the optocoupler unit 141.

[0063] In this embodiment, the heating module 12 is exemplarily a resistance wire, and the switching module 13 is an NMOS transistor. The optocoupler unit 141 includes a diode and a transistor. The positive terminal of the diode serves as the first input terminal of the optocoupler unit 141, and the negative terminal of the diode serves as the second input terminal. The collector of the transistor serves as the first output terminal of the optocoupler unit 141, and the emitter of the transistor serves as the second output terminal. In this embodiment, the heat-generating signal in the monitoring signal is at a high potential, and the non-heat-generating signal in the monitoring signal is at a low potential. When the heating module 12 is enabled, a potential difference exists between its first and second terminals, connecting the first and second input terminals of the optocoupler unit 141. This means the diode in the optocoupler unit 141 is turned on, emitting light, which in turn turns on the transistor. The first potential VCC is output to the control module 11 through the third resistor R3. Since VCC is high relative to ground GND, when the control module 11 detects a high potential (i.e., a heat generation signal) at the port connected to the third resistor R3, it determines that the heating module 12 is in a heating state. When the heating module 12 is not enabled, there is no potential difference between its first and second terminals, disconnecting the first and second input terminals of the optocoupler unit 141. This means the diode in the optocoupler unit 141 is turned off, and the transistor is also turned off. The ground potential GND is output to the control module 11 through the fourth resistor R4 and the third resistor R3. Therefore, when the control module 11 detects a low potential (i.e., a no-heat generation signal) at the port connected to the third resistor R3, it determines that the heating module 12 is in a non-heating state.

[0064] This embodiment exemplarily shows that the heating monitoring module 14 includes an optocoupler unit. In other embodiments, a current detection circuit can also be used to monitor the working status of the heating module 12, which is not specifically limited here.

[0065] Continue to refer to Figure 3Optionally, the heating monitoring module 14 also includes a first diode D1, the positive terminal of which is connected to the second input terminal of the optocoupler unit 141, and the negative terminal of which is connected to the first input terminal of the optocoupler unit 141.

[0066] The first diode D1 clamps the reverse voltage on the input side of the optocoupler 141 at 0.7V, preventing excessive voltage on the input side of the optocoupler 141 from damaging the diode in the optocoupler 141 and improving the reliability of the optocoupler 141.

[0067] Figure 4 This is a schematic diagram of another battery with heating module failure detection function provided by an embodiment of the present invention. Based on the above embodiment, referencing... Figure 3 and Figure 4 The protection drive module 17 includes: a first transistor Q1, a second transistor Q2 and a third transistor Q3; the protection drive module 17 also includes an eleventh resistor R11 and a twelfth resistor R12;

[0068] The first terminal of the first transistor Q1 is connected to the positive terminal B+ of the battery cell 10. The second terminal of the first transistor Q1 is connected to the gate of the second transistor Q2 through the eleventh resistor R11. The gate of the first transistor Q1 is connected to the first terminal of the third transistor Q3 through the twelfth resistor R12.

[0069] The first terminal of the second transistor Q2 is connected to the protection module 16, specifically to the first terminal of the first resistor R1, and the second terminal of the second transistor Q2 is connected to the negative terminal B- of the battery cell 10.

[0070] The second terminal of the third transistor Q3 is connected to ground potential GND, and the gate of the third transistor Q3 is connected to the control module 11.

[0071] Optionally, the first transistor Q1 and the second transistor Q2 are of opposite types, while the second transistor Q2 and the third transistor Q3 are of the same type. In this embodiment, the first transistor Q1 is exemplarily shown as a PMOS transistor, and the second transistor Q2 and the third transistor Q3 are all NMOS transistors. When the control module 11 determines that the heating module 12 has failed, it outputs a high potential to the gate of the third transistor Q3 to control the third transistor Q3 to conduct. After the third transistor Q3 conducts, the first transistor Q1 conducts, and after the first transistor Q1 conducts, the second transistor Q2 conducts. After the second transistor Q2 conducts, a circuit is formed between the positive terminal B+ of the battery cell 10, the fuse F1, the first resistor R1, and the negative terminal B- of the battery cell 10. Current flows through the first resistor R1, and the temperature of the first resistor R1 rises due to the heat generated by the current, causing the fuse F1 to blow. When the control module 11 determines that the heating module 12 has not failed, it outputs a low potential to the gate of the third transistor Q3 to control the third transistor Q3 to turn off, thereby causing the first transistor Q1 and the second transistor Q2 to also turn off, and the protection module 16 is not enabled.

[0072] Continue to refer to Figure 3 and Figure 4 Optionally, the protection drive module 17 also includes: a first Zener diode T1, a fifth resistor R5, a second Zener diode T2, a sixth resistor R6, and a seventh resistor R7;

[0073] The first terminal of the fifth resistor R5 is connected to the first terminal of the first transistor Q1, the second terminal of the fifth resistor R5 is connected to the gate of the first transistor Q1, the positive terminal of the first Zener diode T1 is connected to the gate of the first transistor Q1, and the negative terminal of the first Zener diode T1 is connected to the first terminal of the first transistor Q1.

[0074] The first terminal of the sixth resistor R6 is connected to the gate of the second transistor Q2, the second terminal of the sixth resistor R6 is connected to the second terminal of the second transistor Q2, the positive terminal of the second Zener diode T2 is connected to the second terminal of the second transistor Q2, and the negative terminal of the second Zener diode T2 is connected to the gate of the second transistor Q2.

[0075] The first terminal of the seventh resistor R7 is connected to the gate of the third transistor Q3, and the second terminal of the seventh resistor R7 is connected to the second terminal of the third transistor Q3.

[0076] The first Zener diode T1 limits the voltage between the gate and the first terminal of the first transistor Q1 to below 20V, preventing damage to the transistor due to excessive voltage. The second Zener diode T2 limits the voltage between the gate and the first terminal of the second transistor Q2 to below 20V, preventing damage to the transistor due to excessive voltage. The fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 all serve a current-limiting function.

[0077] Continue to refer to Figure 3 and Figure 4 Optionally, the switch drive module 15 includes: a fourth transistor Q4, a fifth transistor Q5, and a second diode D2;

[0078] The first terminal of the fourth transistor Q4 is connected to the positive terminal B+ of the battery cell 10. Furthermore, it can be connected to the positive terminal B+ of the battery cell 10 through the fuse F1. The second terminal of the fourth transistor Q4 is connected to the positive terminal of the second diode D2. The gate of the fourth transistor Q4 is connected to the first terminal of the fifth transistor Q5.

[0079] The switch drive module 15 also includes a thirteenth resistor R13, and the negative terminal of the second diode D2 is connected to the control terminal of the switch module 13 through the thirteenth resistor R13.

[0080] The second terminal of the fifth transistor Q5 is connected to ground potential GND, and the gate of the fifth transistor Q5 serves as the input terminal IN of the switch drive module 15, which is connected to the control module 11.

[0081] Optionally, the transistor included in the switching module 13 is designated as the sixth transistor Q6. The fourth transistor Q4 and the sixth transistor Q6 are of opposite types, while the fifth transistor Q5 and the sixth transistor Q6 are of the same type. In this embodiment, the fourth transistor Q4 is exemplarily shown as a PMOS transistor, and the fifth transistor Q5 and the sixth transistor Q6 are both NMOS transistors. When the switch control signal received by the gate of the fifth transistor Q5 is an on signal (high potential in this embodiment), the fifth transistor Q5 is turned on. After the fifth transistor Q5 is turned on, the fourth transistor Q4 is also turned on, and after the fourth transistor Q4 is turned on, the sixth transistor Q6 is turned on. When the switch control signal received by the gate of the fifth transistor Q5 is an off signal (low potential in this embodiment), the fifth transistor Q5 is turned off. After the fifth transistor Q5 is turned off, the fourth transistor Q4 is also turned off, and after the fourth transistor Q4 is turned off, the sixth transistor Q6 is turned off.

[0082] Optionally, the switch drive module 15 also includes: a third Zener diode T3, a fourth Zener diode T4, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10;

[0083] The first terminal of the eighth resistor R8 is connected to the first terminal of the fourth transistor Q4, the second terminal of the eighth resistor R8 is connected to the gate of the fourth transistor Q4, the positive terminal of the third Zener diode T3 is connected to the gate of the fourth transistor Q4, and the negative terminal of the third Zener diode T3 is connected to the first terminal of the fourth transistor Q4.

[0084] The first terminal of the ninth resistor R9 is connected to the gate of the fifth transistor Q5, and the second terminal of the ninth resistor Q9 is connected to the second terminal of the fifth transistor Q5.

[0085] The positive terminal of the fourth Zener diode T4 is connected to the second terminal of the sixth transistor Q6, and the negative terminal of the fourth Zener diode T4 is connected to the gate of the sixth transistor Q6. The first terminal of the tenth resistor R10 is connected to the gate of the sixth transistor Q6, and the second terminal of the tenth resistor R10 is connected to the second terminal of the sixth transistor Q6. The gate of the sixth transistor Q6 serves as the control terminal of the switching module 13, the first terminal of the sixth transistor Q6 is connected to the heating module 12, and the second terminal of the sixth transistor T6 is connected to the negative terminal B- of the battery cell 10.

[0086] The third Zener diode T3 limits the voltage between the gate and the first terminal of the fourth transistor Q4 to below 20V, preventing excessive voltage from damaging Q4. The fourth Zener diode T4 also limits the voltage between the gate and the first terminal of the sixth transistor Q6 to below 20V, preventing excessive voltage from damaging Q6. The eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 all serve a current-limiting function.

[0087] Optionally, a transient suppression diode TVS1 is also connected to both ends of the switching module 13 to prevent instantaneous high voltage across the switching module 13 and improve circuit reliability.

[0088] Optionally, the battery with heating module failure detection function also includes at least two reverse connection protection modules, each connected between the protection module 16 and the heating module 2. Specifically, the battery with heating module failure detection function also includes at least three reverse connection protection modules. The first reverse connection protection module includes a seventh transistor Q7 and a fourteenth resistor R14; the second reverse connection protection module includes an eighth transistor Q8 and a fifteenth resistor R15; and the third reverse connection protection module includes a ninth transistor Q9 and a sixteenth resistor R16. The first terminals of the seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are all connected to the protection module 16, and the second terminals of the seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are all connected to the first terminal of the heating module 12. The fourteenth resistor R14 is connected between the gate of the seventh transistor Q7 and the first terminal of the fifth transistor Q5; the fifteenth resistor R15 is connected between the gate of the eighth transistor Q8 and the first terminal of the fifth transistor Q5; and the sixteenth resistor R16 is connected between the gate of the ninth transistor Q9 and the first terminal of the fifth transistor Q5. When the voltage at the positive terminal B+ of battery cell 10 is less than the voltage at the negative terminal B- of battery cell 10, the seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are all turned off to prevent battery cell 10 from being reverse-connected and causing damage to the circuit.

[0089] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0090] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A battery, characterized in that, include: Battery cell, control module, heating module, switch module, heating monitoring module, and switch drive module; The heating module and the switching module are connected in series between the positive terminal and the negative terminal of the battery cell; The output terminal of the switch drive module is connected to the control terminal of the switch module and is configured to control the on / off state of the switch module according to the switch control signal input to its own input terminal, and when the switch module is in the on state, the heating module is enabled to heat the battery cell; the on / off state of the switch module includes the on state. The heating monitoring module is connected to both ends of the heating module, and the output end of the heating monitoring module is connected to the control module. The heating monitoring module is configured to output a monitoring signal that characterizes the working status of the heating module. The control module is connected to the input terminal of the switch drive module, and the control module is configured to determine whether the heating module has failed based on the monitoring signal and the switch control signal.

2. The battery according to claim 1, characterized in that, It also includes a protection module and a protection drive module, wherein the protection module is connected between the heating module and the positive terminal of the battery cell; The control module is connected to the input terminal of the protection drive module. The control module is also configured to send a protection control signal to the protection drive module in response to determining that the heating module has failed, so that the protection drive module drives the protection module to enable.

3. The battery according to claim 2, characterized in that, The protection module includes a first resistor and a fuse. A first end of the first resistor is connected to the output end of the protection drive module, and a second end of the first resistor is connected to the fuse. The fuse is also connected between the heating module and the positive terminal of the battery cell.

4. The battery according to claim 1, characterized in that, The heating monitoring module includes: a second resistor, an optocoupler unit, a third resistor, and a fourth resistor; The first end of the second resistor is connected to one end of the heating module, the second end of the second resistor is connected to the first input end of the optocoupler unit, and the second input end of the optocoupler unit is connected to the other end of the heating module; The first output terminal of the optocoupler unit is connected to a first potential, the second output terminal of the optocoupler unit is connected to the first terminal of the third resistor and the first terminal of the fourth resistor respectively, the second terminal of the third resistor is connected to the control module, and the second terminal of the fourth resistor is connected to ground potential. The current flows from the first input terminal of the optocoupler to the second input terminal of the optocoupler.

5. The battery according to claim 4, characterized in that, The heating monitoring module further includes a first diode, the positive terminal of which is connected to the second input terminal of the optocoupler unit, and the negative terminal of which is connected to the first input terminal of the optocoupler unit.

6. The battery according to claim 2, characterized in that, The protection drive module includes: a first transistor, a second transistor, and a third transistor; The first terminal of the first transistor is connected to the positive terminal of the battery cell, the second terminal of the first transistor is connected to the gate of the second transistor, and the gate of the first transistor is connected to the first terminal of the third transistor. The first terminal of the second transistor is connected to the protection module, and the second terminal of the second transistor is connected to the negative terminal of the battery cell; The second terminal of the third transistor is connected to ground potential, and the gate of the third transistor is connected to the control module.

7. The battery according to claim 6, characterized in that, The protection drive module further includes: a first Zener diode, a fifth resistor, a second Zener diode, a sixth resistor, and a seventh resistor; The first end of the fifth resistor is connected to the first terminal of the first transistor, the second end of the fifth resistor is connected to the gate of the first transistor, the positive terminal of the first Zener diode is connected to the gate of the first transistor, and the negative terminal of the first Zener diode is connected to the first terminal of the first transistor. The first end of the sixth resistor is connected to the gate of the second transistor, the second end of the sixth resistor is connected to the second terminal of the second transistor, the positive terminal of the second Zener diode is connected to the second terminal of the second transistor, and the negative terminal of the second Zener diode is connected to the gate of the second transistor. The first end of the seventh resistor is connected to the gate of the third transistor, and the second end of the seventh resistor is connected to the second terminal of the third transistor.

8. The battery according to claim 1, characterized in that, The switch driving module includes: a fourth transistor, a fifth transistor, and a second diode; The first terminal of the fourth transistor is connected to the positive terminal of the battery cell, the second terminal of the fourth transistor is connected to the positive terminal of the second diode, and the gate of the fourth transistor is connected to the first terminal of the fifth transistor. The negative terminal of the second diode is connected to the control terminal of the switching module; The second terminal of the fifth transistor is connected to ground potential, and the gate of the fifth transistor is connected to the control module.

9. The battery according to claim 8, characterized in that, The switch drive module further includes: a third Zener diode, an eighth resistor, and a ninth resistor; The first terminal of the eighth resistor is connected to the first terminal of the fourth transistor, the second terminal of the eighth resistor is connected to the gate of the fourth transistor, the positive terminal of the third Zener diode is connected to the gate of the fourth transistor, and the negative terminal of the third Zener diode is connected to the first terminal of the fourth transistor. The first end of the ninth resistor is connected to the gate of the fifth transistor, and the second end of the ninth resistor is connected to the second terminal of the fifth transistor.

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