Battery control circuit and battery for image pickup device

Abstract

The utility model discloses a battery control circuit and a battery used for a camera device, the battery control circuit comprises a first contact terminal used for charging or discharging a battery body, an access monitoring circuit comprises an on-off control circuit electrically connected between the battery body and the first contact terminal, an input end of a detection circuit is electrically connected with the battery body, and an output end of the detection circuit is electrically connected with the first contact terminal. The detection end of the detection circuit is electrically connected with the first contact terminal, and the detection circuit is used for generating a trigger signal when the first contact terminal is connected to external equipment; and the main control chip is electrically connected with the control end of the on-off control circuit and the signal transmitting end of the detection circuit. Therefore, the control chip controls the on-off control circuit to be switched on after receiving the trigger signal, so that a current path is established between the battery body and the first contact terminal, and discharging or charging of the battery is realized. Through the mode, charging failure or sudden current increase caused by mismatching of the external equipment and the port can be avoided, and the safety of the equipment and the battery is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic equipment, and particularly relates to a control circuit for a battery and a battery for a camera device. Background Art

[0002] In the fields of photography, video production and other professional fields, the demand for large-capacity batteries has increased significantly. To meet these demands, various battery interfaces such as D-Tap ports are widely used to provide a stable power output for devices.

[0003] Currently, many large-capacity batteries on the market are equipped with D-Tap ports, and the D-Tap ports output current in a direct-through manner, directly transmitting the electrical energy of the battery to external devices.

[0004] Due to the direct-through output of current, the D-Tap port cannot monitor and adjust the output current in real time, resulting in low power management efficiency. This also brings potential safety hazards. For example, when the external device is not matched with the port, it may cause inability to charge or a sudden increase in current, damaging the battery life. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a control circuit for a battery, aiming to solve the problem that the existing battery is prone to misconnection and cause a sudden increase in current.

[0006] To achieve the above purpose, the utility model proposes a control circuit for a battery, and the control circuit for the battery includes:

[0007] A first contact terminal, electrically connected to the battery body, for charging or discharging the battery body;

[0008] An access monitoring circuit, the access monitoring circuit includes a on-off control circuit and a detection circuit, the on-off control circuit is electrically connected between the battery body and the first contact terminal; the input end of the detection circuit is electrically connected to the battery body, the detection end of the detection circuit is electrically connected to the first contact terminal, and the detection circuit is used to generate a trigger signal when the first contact terminal accesses an external device, and the trigger signal is used to indicate whether the interface of the external device matches the first contact terminal;

[0009] A main control chip, respectively electrically connected to the control end of the on-off control circuit and the signal transmitting end of the detection circuit, and the main control chip is used to send a control signal to the control end of the on-off control circuit when receiving the trigger signal through the signal transmitting end to control the on-off control circuit to conduct or disconnect.

[0010] In some embodiments, the detection circuit includes:

[0011] An output detection circuit, the output detection circuit being electrically connected to the battery body, and the output end of the output detection circuit being electrically connected to the signal transmitting end; and / or

[0012] An input detection circuit, the input detection circuit being electrically connected to the battery body, and the output end of the input detection circuit being electrically connected to the signal transmitting end.

[0013] In some embodiments, the output detection circuit includes a first resistor, a first switching transistor, a first diode, and a first trigger terminal. One end of the first resistor and the emitter of the first switching transistor are electrically connected to the battery body. The base of the first switching transistor is electrically connected to the other end of the first resistor and a first contact terminal. The collector of the first switching transistor is electrically connected to the anode of the first diode, and the cathode of the first diode is electrically connected to the output end of the output detection circuit.

[0014] In some embodiments, the input detection circuit includes:

[0015] A second resistor, one end of the second resistor being electrically connected to the battery body and one end of the first resistor;

[0016] A second switching transistor, the base of the second switching transistor being electrically connected to the other end of the second resistor, the emitter of the second switching transistor being electrically connected to the other end of the first resistor and the base of the first switching transistor;

[0017] A second diode, the anode of the second diode being electrically connected to the collector of the second switching transistor, and the cathode of the second diode being electrically connected to the output end of the input detection circuit.

[0018] In some embodiments, the main control chip includes a first control terminal;

[0019] The on-off control circuit includes:

[0020] A third switching transistor, the drain of the third switching transistor being electrically connected to the battery body;

[0021] A fourth switching transistor, the source of the fourth switching transistor being electrically connected to the source of the third switching transistor, and the drain of the fourth switching transistor being electrically connected to the first contact terminal;

[0022] A switch driving module, the control terminal of the switch driving module being connected to the first control terminal, one conducting terminal of the switch driving module being electrically connected to the gates of the third switching transistor and the fourth switching transistor, and the other conducting terminal of the switch driving module being grounded.

[0023] In some embodiments, the main control chip further includes a current acquisition terminal and a voltage acquisition terminal;

[0024] The access monitoring circuit further includes a first electrical signal sampling circuit, and the first electrical signal sampling circuit includes:

[0025] A current sampling circuit, electrically connected between the third switching tube and the fourth switching tube, for obtaining the current value therebetween and feeding it back to the main control chip through the current acquisition terminal;

[0026] A voltage sampling circuit, electrically connected between the third switching tube and the fourth switching tube, for obtaining the voltage value therebetween and feeding it back to the main control chip through the voltage acquisition terminal.

[0027] In some embodiments, the current sampling circuit includes:

[0028] A sampling resistor, disposed between the third switching tube and the fourth switching tube;

[0029] An operational amplifier device, the sampling ends of the operational amplifier device are electrically connected to both ends of the sampling resistor respectively, for obtaining the current at both ends of the sampling resistor, amplifying and outputting a sampling current to the current acquisition terminal;

[0030] The voltage sampling circuit includes:

[0031] Two voltage-dividing resistors, the two voltage-dividing resistors are connected in series, one end of one of the two voltage-dividing resistors is electrically connected between the fourth switching tube and the first contact terminal, the other end of the other is grounded, and the voltage acquisition terminal is electrically connected between the two voltage-dividing resistors for obtaining a voltage value.

[0032] In some embodiments, the control circuit of the battery further includes a second contact terminal;

[0033] A second electrical signal sampling circuit, connected in series between the second contact terminal and the battery body, and the second electrical signal sampling circuit is used to obtain the current and voltage values between the second contact terminal and the battery body.

[0034] In some embodiments, the control circuit of the battery further includes an online upgrade circuit, and the online upgrade circuit includes a communication switching circuit and a wireless communication chip. The communication switching circuit is electrically connected between the wireless communication chip and the main control chip, and when the upgrade program is executed, the communication switching circuit enables data interaction between the main control chip and the wireless communication chip.

[0035] The present utility model further provides a battery for a camera device, including a housing, a battery body and a circuit board. The circuit board is provided with the aforementioned control circuit of the battery, and the circuit board and the battery body are disposed in the housing.

[0036] In the technical solution of this embodiment, a monitoring circuit is electrically connected between the battery body and the first contact terminal. When the first contact terminal is correctly connected to an external device, the access monitoring circuit generates a trigger signal and sends it to the main control chip. After receiving the trigger signal, the main control chip controls the on-off control circuit to conduct, thereby establishing a current path between the battery body and the first contact terminal to realize the discharge or charging of the battery. In this way, it is possible to avoid the inability to charge or the sudden increase in current caused by the mismatch between the external device and the port, ensuring the safety of the device and the battery. Description of the Drawings

[0037] Figure 1 It is a schematic diagram of the module electrical connection of the control circuit of the battery in an embodiment of the present invention;

[0038] Figure 2 It is a circuit diagram of the control circuit of the battery in an embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the main control chip in an embodiment of the present invention;

[0040] Figure 4 It is a circuit diagram of the online upgrade circuit in an embodiment of the present invention;

[0041] Figure 5 It is a circuit diagram of the online upgrade circuit in an embodiment of the present invention;

[0042] Figure 6 It is a circuit diagram of the online upgrade circuit in an embodiment of the present invention.

[0043] Explanation of the Reference Numerals in the Drawings:

[0044] 100. First contact terminal; 200. Access monitoring circuit; 210. On-off control circuit; 210a. Control terminal of the on-off control circuit; Q3. Third switching transistor; Q4. Fourth switching transistor; 212. Switch driving module; 212a. Control terminal of the switch driving module; 212b. One conduction terminal of the switch driving module; 212c. Another conduction terminal of the switch driving module; 220. Detection circuit; 220a. Input terminal of the detection circuit; 220b. Detection terminal of the detection circuit; 220c. Signal transmitting terminal of the detection circuit; 222. Output detection circuit; R1. First resistor; Q1. First switching transistor; D1. First diode; Output terminal 222d of the output detection circuit; 224. Input detection circuit; R2. Second resistor; Q2. Second switching transistor; D2. Second diode; Output terminal 224a of the input detection circuit; 300. Main control chip; 300a. First control terminal; 300b. Current acquisition terminal; 300c. Voltage acquisition terminal; 400. First electrical signal sampling circuit; 410. Current sampling circuit; R3. Sampling resistor; U7. Operational amplifier device; 412. Voltage sampling circuit; R4. Two voltage dividing resistors; 500. Second electrical signal sampling circuit; 600. Second contact terminal; 700. Online upgrade circuit; U15. Communication switching circuit; U13. Wireless communication chip; 802. Battery body.

[0045] The realization, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0046] Next, the solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0047] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be a middle element at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time.

[0049] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0050] The control circuit of the battery in the embodiment of the present utility model is mainly applied to the technical field of photographic devices, where the photographic devices include but are not limited to cameras, video cameras, etc. Specifically, the control circuit of the battery in the embodiment of the present utility model is mainly used to detect whether the photographic device is matched with the battery port. That is, after the battery and the photographic device are correctly assembled, the battery is controlled to discharge or charge, so as to avoid sudden increase in current caused by incorrect connection and ensure the safety of the device and the battery. The specific circuit diagram of the control circuit of the battery can be referred to Figures 1 to 3 , Figure 1 which is a schematic diagram of the module electrical connection of the control circuit of the battery in an embodiment of the present utility model, Figure 2 which is the circuit diagram of the control circuit of the battery in an embodiment of the present utility model, Figure 3 which is the schematic diagram of the structure of the main control chip 300 in an embodiment of the present utility model.

[0051] The embodiment of the present utility model provides a control circuit of a battery, and the control circuit of the battery includes:

[0052] A first contact terminal 100, electrically connected to the battery body 802, for charging or discharging the battery body 802;

[0053] An access monitoring circuit 200, the access monitoring circuit 200 includes a on-off control circuit 210 and a detection circuit 220, and the on-off control circuit 210 is electrically connected between the battery body 802 and the first contact terminal 100;

[0054] A detection circuit, the input end 220a of the detection circuit is electrically connected to the battery body 802, the detection end 220b of the detection circuit is electrically connected to the first contact terminal 100, and the detection circuit is used to generate a trigger signal when the first contact terminal 100 accesses an external device;

[0055] A main control chip 300, respectively electrically connected to the control end of the on-off control circuit 210 and the signal transmitting end 220c of the detection circuit, and the main control chip 300 is used to control the on-off control circuit 210 to conduct when receiving the trigger signal.

[0056] In this embodiment, the first contact terminal 100 is electrically connected to the battery body 802 to provide a current channel for charging or discharging. The first contact terminal 100 can use a standard D-Tap interface or other suitable power interfaces, such as XT60, DC power plug, etc., to meet the connection requirements of different devices.

[0057] The function of the detection circuit is to detect whether an external device is connected to the first contact terminal 100, and to control the charging or discharging process of the battery. After receiving the instruction from the main control chip 300, the on-off control circuit 210 is responsible for controlling the on-off of the current. The on-off control circuit 210 can use devices such as MOSFET or relays, which can achieve efficient and reliable current switching under the control of the main control chip 300. When it is detected that an external device is connected, a trigger signal is generated and sent to the main control chip 300. The detection circuit can use components such as photocouplers, resistor dividers or Hall sensors, which can accurately sense the connection status of external devices and generate corresponding signals.

[0058] During the operation of the control circuit of the battery of this embodiment, before the external device is connected to the first contact terminal 100, the battery control circuit is in a standby state. Specifically, the on-off control circuit 210 is in a disconnected state at this time, and the current path between the battery body and the first contact terminal 100 is not established, so as to prevent the battery power from being consumed unnecessarily. At the same time, the detection circuit 220 is in a monitoring state, monitoring the voltage and current state of the first contact terminal 100 in real time, and being ready to detect the connection of the external device at any time. At this time, the main control chip 300 is also in a standby monitoring state. The main control chip 300 monitors the state of the first contact terminal 100 through the feedback signal of the detection circuit 220, waiting for the arrival of the trigger signal.

[0059] When an external device is connected to the first contact terminal 100, the detection circuit 220 immediately senses the current change and generates a trigger signal. The trigger signal is sent to the main control chip 300. After receiving the signal, the main control chip 300 processes it according to a preset program (for example, if the voltage / current difference generated by the connected device is not within the preset range, it is determined to be an unmatched external device, and if it is within the preset range, it is determined to be a matched external device), and then issues an instruction to control the on-off control circuit 210 to conduct.

[0060] If a signal indicates that the interface of the external device matches the contact terminal 100, the main control chip 300 controls the on-off control circuit 210 to conduct, and an electric current path is established between the battery body 802 and the first contact terminal 100, starting to supply power to the external device or charging the battery body 802. When the external device disconnects from the first contact terminal 100, the detection circuit 220 detects this state change, stops sending the trigger signal, and the main control chip 300 issues a corresponding instruction to disconnect the on-off control circuit 210, thereby cutting off the electric current path to ensure the safety of the battery.

[0061] In the technical solution of this embodiment, by electrically connecting the monitoring circuit 200 between the battery body 802 and the first contact terminal 100, when the first contact terminal 100 is connected to an external device, the connected monitoring circuit 200 will generate a trigger signal and send it to the main control chip 300. After receiving the trigger signal, the main control chip 300 determines whether the external device is correctly assembled with the first contact terminal 100 according to a preset program. If the assembly is correct, the main control chip 300 will control the on-off control circuit 210 to conduct, thereby establishing an electric current path between the battery body 802 and the first contact terminal 100 to realize the discharge or charging of the battery. In this way, sudden increase in current caused by misconnection can be avoided, ensuring the safety of the device and the battery.

[0062] During the use of the battery, it will inevitably experience two states: charging and discharging. The battery control circuit in this embodiment can intelligently manage these two states to ensure the safe connection and stable operation of the battery and the external device. Continuing to refer to Figure 2 , in this embodiment, the detection circuit includes:

[0063] An output detection circuit 222, the input end 220a of the output detection circuit 222 is electrically connected to the battery body 802, and the output end of the output detection circuit 222 is electrically connected to the signal transmitting end 220c;

[0064] And / or, an input detection circuit 224, the input end 220a of the input detection circuit 224 is electrically connected to the battery body 802, and the output end of the input detection circuit 224 is electrically connected to the signal transmitting end 220c.

[0065] In this embodiment, the output detection circuit 222 is connected between the battery body 802 and the signal transmitting end 220c, and is used to monitor the connection state between the battery and the first contact terminal 100 in real time. When an external device is connected to the first contact terminal 100, the output detection circuit 222 will generate a corresponding trigger signal. This trigger signal is the key basis for the main control chip 300 to make a judgment and perform corresponding operations.

[0066] For example, when an external device is connected to the first contact terminal 100, the output detection circuit 222 generates a trigger signal, which is transmitted to the main control chip 300 through the signal transmission end 220c. After receiving the signal, the main control chip 300 determines whether the device is correctly connected according to a preset program.

[0067] After the main control chip 300 determines that the external device is correctly assembled with the first contact terminal 100, the on-off control circuit 210 is controlled to conduct. This step is crucial because after confirming the correct connection of the device, the establishment of the current path is allowed, thus starting the discharging process. Among them, a MOSFET or a relay can be used as the core device of the on-off control circuit 210, which can quickly and efficiently switch the current path.

[0068] Based on the foregoing output detection circuit 222, this embodiment further includes an input detection circuit 224. The design and function of the input detection circuit 224 are similar to those of the output detection circuit 222, aiming to provide the battery control circuit with more comprehensive monitoring capabilities to ensure the safety and reliability of the charging and discharging processes.

[0069] In the battery control circuit of this embodiment, when the main control chip 300 sends a conduction instruction, the on-off control circuit 210 closes, allowing current to flow from the battery body 802 to the first contact terminal 100, or from the first contact terminal 100 to the battery body 802, depending on whether it is in the charging or discharging state at present. Specifically, whether it is in the charging state or the discharging state can be detected by the current sampling circuit 410. Exemplarily, when the battery is in the charging state, current flows into the battery body 802, that is, the current direction is from the charger to the battery. When the battery body 802 is in the discharging state, current flows out of the battery body 802, that is, the current direction is from the battery body 802 to the load. In this way, the state of the battery body 802 can be directly indicated by the positive and negative and direction of the current. A positive current (for example, flowing in from the positive electrode) indicates charging, and a negative current (for example, flowing out from the positive electrode) indicates discharging.

[0070] In this way, the connection state of the external device can be effectively monitored to ensure that the battery can be charged and discharged only when the ports match. This intelligent control method not only improves the safety of the battery and the device, but also optimizes the power management, avoiding the problem of sudden increase in current caused by the mismatch of the ports between the external device and the battery body 802.

[0071] Further, continue to refer to Figure 2, in this embodiment, the output detection circuit 222 includes a first resistor R1, a first switching transistor Q1, a first diode D1, and a first trigger terminal 222a. One end of the first resistor R1, the emitter of the first switching transistor Q1 are electrically connected to the battery body 802. The other end of the first resistor R1 is electrically connected to the base of the first switching transistor Q1. The collector of the first switching transistor Q1 is electrically connected to the anode of the first diode D1. The cathode of the first diode D1 is electrically connected to the first trigger terminal 222a;

[0072] Wherein, the first trigger terminal 222a outputs a trigger signal to the signal transmitting terminal 220c.

[0073] In this embodiment, the first switching transistor Q1 can be an NPN-type triode. Its emitter is electrically connected to the battery body 802. The base is electrically connected to the battery body 802 through the first resistor R1. The collector is electrically connected to the anode of the first diode D1. The anode of the first diode D1 is then electrically connected to the collector of the first switching transistor Q1, and the cathode is electrically connected to the first trigger terminal 222a. The first trigger terminal 222a is electrically connected to the signal transmitting terminal 220c for outputting a trigger signal.

[0074] In this embodiment, the base of the first switching transistor Q1 is electrically connected to the battery body 802 and the first contact terminal 100 through the first resistor R1. The first contact terminal 100 is connected to the positive and negative electrodes of an external device to form a loop.

[0075] When an external device is connected, the positive electrode of the external device is connected to the positive electrode of the first contact terminal 100, and the negative electrode is connected to the negative electrode of the first contact terminal 100 to complete the circuit connection. At this time, the potential of the first contact terminal 100 changes, pulling down the level of the base of the first switching transistor Q1. The reduction of the base level causes the NPN-type triode (the first switching transistor Q1) to conduct. After the first switching transistor Q1 conducts, current flows from the battery body 802 through the first resistor R1 to the base of the first switching transistor Q1. Subsequently, the current flows from the emitter of the first switching transistor Q1 to the collector, and then through the first diode D1 to the first trigger terminal 222a. In this way, the current passes through the first switching transistor Q1 and the first diode D1 in sequence, and finally outputs a trigger signal from the first trigger terminal 222a (i.e., the signal transmitting terminal 220c).

[0076] The trigger signal output by the first trigger terminal 222a is transmitted to the main control chip 300. After receiving the trigger signal, the main control chip 300 determines whether the external device is correctly assembled with the first contact terminal 100 according to a preset program. After confirming the correct assembly, the main control chip 300 controls the on-off control circuit 210 to conduct, establishing a current path for discharging.

[0077] Furthermore, continue to refer to Figure 2, to achieve access detection during the charging process, in this embodiment, the input detection circuit 224 includes:

[0078] A second resistor R2, one end of the second resistor R2 is electrically connected to one end of the battery body 802 and / or the first resistor R1;

[0079] A second switching tube Q2, the base of the second switching tube Q2 is electrically connected to the other end of the second resistor R2, the emitter of the second switching tube Q2 is electrically connected to the other end of the first resistor R1, and / or is electrically connected to the base of the first switching tube Q1;

[0080] A second diode D2, the anode of the second switching tube Q2 is electrically connected to the collector of the second switching tube Q2, and the cathode is electrically connected to the first trigger terminal 222a.

[0081] In this embodiment, the second switching tube Q2 can also be an NPN-type triode, and its base is electrically connected to the battery body 802 through the second resistor R2; during operation, when an external charging device is connected to the first contact terminal 100, the current flows from the external device to the positive electrode of the battery body 802. At this time, since the base of the second switching tube Q2 is connected to the positive electrode of the battery body 802, when the charging current flows to the battery body 802, it will pull down the level of the base of the second switching tube Q2. The reduction of the base level causes the NPN-type triode (the second switching tube Q2) to conduct.

[0082] After the second switching tube Q2 conducts, since the emitter of the second switch is electrically connected to the first contact terminal 100, the current can flow from the positive electrode of the external device to the emitter of the second switching tube Q2, then to the collector, and through the second diode D2 to the first trigger terminal 222a, generating a trigger signal and sending it to the main control chip 300.

[0083] This embodiment provides a comprehensive charge and discharge management solution by designing a battery control circuit including an output detection circuit 222 and an input detection circuit 224. The dual detection mechanism ensures the correct connection of the device and the battery, avoids the problem of sudden increase in current caused by misconnection, and improves the safety and reliability of the system. Through intelligent control and efficient management, this embodiment provides a reliable power solution for applications such as photographic equipment.

[0084] Whether during the charging process or the discharging process, the on-off control circuit 210 plays a role in controlling the conduction or cut-off of the battery body 802 and the first contact resistance during the process. The specific circuit structure of the on-off control circuit 210 and the devices to be used, such as those mentioned in the foregoing embodiments, can use MOSFET. For details, refer to Figure 2 and Figure 3 , in this embodiment, the main control chip 300 includes a first control terminal 300a;

[0085] The on-off control circuit 210 includes:

[0086] A third switch tube Q3, wherein the drain of the third switch tube Q3 is electrically connected to the battery body 802;

[0087] A fourth switch tube Q4, wherein a source of the fourth switch tube Q4 is electrically connected to a source of the third switch tube Q3, and a drain of the fourth switch tube Q4 is electrically connected to the first contact terminal 100;

[0088] The switch driving module 212 has a control end connected to the first control end 300a, a conducting end of the switch driving module 212 is electrically connected to the gates of the third switch tube Q3 and the fourth switch tube Q4, and another conducting end of the switch driving module 212 is grounded.

[0089] In this embodiment, the on-off control circuit 210 plays a key role in controlling the conduction or disconnection between the battery body 802 and the first contact terminal 100. The specific structure of the on-off control circuit 210 includes a third switch tube Q3, a fourth switch tube Q4 and a switch driving module 212. The third switch tube Q3 and the fourth switch tube Q4 can both use NPN type MOSFETs, which have efficient current control capabilities and fast switching speeds. The switch driving module 212 can use a dedicated MOSFET driver chip, such as IR2110 or a similar driver chip, to ensure accurate control and efficient driving of the switch tube.

[0090] In actual operation, the on-off control circuit 210 connects or disconnects the battery with the external device according to the instruction of the main control chip 300 .

[0091] For example, before an external device is connected to the first contact terminal 100, the battery control circuit is in a standby state. Specifically, the on-off control circuit 210 is in a disconnected state, and the current path between the battery body and the first contact terminal 100 is not established, so as to prevent the battery power from being consumed unnecessarily. At the same time, the detection circuit 220 is in a monitoring state, monitoring the voltage and current state of the first contact terminal 100 in real time, and being ready to detect the connection of the external device at any time. At this time, the main control chip 300 is also in a standby monitoring state. The main control chip 300 monitors the state of the first contact terminal 100 through the feedback signal of the detection circuit 220, waiting for the arrival of the trigger signal.

[0092] When an external charging device is connected to the first contact terminal 100, the input detection circuit 224 detects the presence of the external device and sends a trigger signal to the main control chip 300. The main control chip 300 issues a control signal to the switch driving module 212 through the first control terminal 300a. After receiving the signal, the switch driving module 212 drives the gates of the third switch tube Q3 and the fourth switch tube Q4. In this process, the switch driving module 212 will pull down the levels of the gates of the third switch tube Q3 and the fourth switch tube, making them conduct.

[0093] After conduction, the current flows from the external charging device through the first contact terminal 100, enters the battery body 802 through the fourth switch tube Q4 and the third switch tube Q3, realizing the charging process.

[0094] The battery control circuit of this embodiment uses NPN-type MOSFETs as switch tubes. Combined with the efficient switch driving module 212, it can achieve fast response and efficient current control, ensuring the reliability and stability of the charging and discharging processes. And through the intelligent control of the main control chip 300 to turn on and off the conduction circuit, it avoids sudden increases in current and equipment damage caused by misoperation, greatly improving the safety of the system.

[0095] During the charging or discharging process, if the external device malfunctions and continues to charge or discharge, it may damage the battery or the external device. Therefore, it is necessary to continuously monitor the dynamics of the charging and discharging process, including current, voltage, current direction, and inserted detection signals, to provide the necessary conditions for the intelligent control of the MCU, and to realize functions such as displaying power, voltage, current, input or output power limitation, and overcurrent and overvoltage protection. To achieve this function, it can be realized by the cooperation of the first electrical signal sampling circuit 400 and the main control chip 300. Specifically, reference can be continued to Figure 2 and Figure 3 , in this embodiment, the access monitoring circuit 200 further includes a first electrical signal sampling circuit 400, and the first electrical signal sampling circuit 400 includes:

[0096] A current sampling circuit 410, electrically connected between the third switch tube Q3 and the fourth switch tube Q4, for obtaining the current value between the two and feeding it back to the main control chip 300;

[0097] A voltage sampling circuit 412, electrically connected between the third switch tube Q3 and the fourth switch tube Q4, for obtaining the voltage value between the two and feeding it back to the main control chip 300.

[0098] In this embodiment, the access monitoring circuit 200 further includes a first electrical signal sampling circuit 400. The first electrical signal sampling circuit 400 includes a current sampling circuit 410 and a voltage sampling circuit 412. These electrical signal sampling circuits can accurately collect and real-time feedback the key current and voltage data during the charging and discharging process, providing necessary monitoring information for the main control chip 300.

[0099] During the operation of the battery control circuit in this embodiment, when an external device is connected and starts charging or discharging, the current sampling circuit 410 monitors the current between the third switching transistor Q3 and the fourth switching transistor Q4 in real time. The current value can be collected by a current sensor and fed back to the main control chip 300 through a signal line. At the same time, the voltage sampling circuit 412 monitors the voltage between the third switching transistor Q3 and the fourth switching transistor Q4 in real time. The voltage value can be collected by a voltage sensor and fed back to the main control chip 300 through a signal line.

[0100] Based on the received current and voltage data, the main control chip 300 analyzes the current charging and discharging state. Through preset algorithms and parameters, the main control chip 300 determines whether there are abnormal situations, such as overcurrent, overvoltage, or an abnormal current direction.

[0101] If an abnormal situation is detected, the main control chip 300 immediately takes corresponding protection measures, such as disconnecting the on-off control circuit 210 to stop the charging or discharging process to protect the safety of the battery and external device.

[0102] In some embodiments, the main control chip 300 can also calculate the current power, input or output voltage and current based on the collected current and voltage data, and display these data on the display screen in real time.

[0103] Through these real-time data displays, users can intuitively understand the current charging and discharging state and ensure that the device operates within a safe range.

[0104] In this embodiment, by introducing the current sampling circuit 410 and the voltage sampling circuit 412, the main control chip 300 can detect abnormal situations in time and take protection measures to avoid damage to the battery and external device.

[0105] Continue to refer to Figure 2 and Figure 3 , in this embodiment, the main control chip 300 further includes a current acquisition terminal 300b and a voltage acquisition terminal 300c. To achieve accurate sampling and monitoring of current and voltage, the design of the access monitoring circuit 200 includes a sampling resistor R3, an operational amplifier device U7, and two voltage dividing resistors R4. Specifically:

[0106] The main control chip 300 further includes a current acquisition terminal 300b and a voltage acquisition terminal 300c;

[0107] The current sampling circuit 410 includes:

[0108] A sampling resistor R3, disposed between the third switching transistor Q3 and the fourth switching transistor Q4;

[0109] An operational amplifier device U7, the sampling terminals of the operational amplifier device U7 are electrically connected to both ends of the sampling resistor R3 respectively, for obtaining the current at both ends of the sampling resistor R3, amplifying and outputting the sampled current to the current acquisition terminal 300b;

[0110] The voltage sampling circuit 412 includes:

[0111] Two voltage-dividing resistors R4, the two voltage-dividing resistors R4 are connected in series, one end of one of the two voltage-dividing resistors R4 is electrically connected between the fourth switching transistor Q4 and the first contact terminal 100, the other end of one of them is grounded, and the voltage acquisition terminal 300c is electrically connected between the two voltage-dividing resistors R4 for obtaining the voltage value.

[0112] During the working process, when an external device is connected and starts to charge or discharge, the current passes through the sampling resistor R3 between the third switching transistor Q3 and the fourth switching transistor Q4. The voltage difference across the sampling resistor R3 reflects the passing current. The operational amplifier device U7 obtains the voltage difference across the sampling resistor R3, amplifies it and outputs it to the current acquisition terminal 300b, and feeds it back to the main control chip 300.

[0113] At the same time, the voltage dividing point between the two voltage-dividing resistors R4 is connected to the voltage acquisition terminal 300c. The voltage at this voltage dividing point reflects the voltage value between the fourth switching transistor Q4 and the first contact terminal 100. The main control chip 300 receives this voltage value through the voltage acquisition terminal 300c.

[0114] The main control chip 300 then analyzes the current charge and discharge state according to the received current and voltage data. Through preset algorithms and parameters, the main control chip 300 determines whether there are abnormal conditions, such as overcurrent, overvoltage or abnormal current direction.

[0115] If an abnormal condition is detected, the main control chip 300 immediately takes corresponding protection measures, such as disconnecting the on-off control circuit 210 and stopping the charging or discharging process to protect the safety of the battery and the external device.

[0116] In addition to the D-Tap interface mentioned in the foregoing embodiments, the battery may also have other interfaces to cope with devices with different interfaces. In order to achieve accurate monitoring of the current and voltage between these interfaces and the battery body 802, the control circuit further includes a second electrical signal sampling circuit 500. This electrical signal sampling circuit is connected in series between these interfaces and the battery body 802 for obtaining the current and voltage values between the two. For details, refer to Figure 4 , Figure 4This is the circuit diagram of the online upgrade circuit in an embodiment of the present utility model.

[0117] In this embodiment, the control circuit of the battery further includes a second contact terminal 600;

[0118] The second electrical signal sampling circuit 500 is connected in series between the second contact terminal 600 and the battery body 802. The second electrical signal sampling circuit 500 is used to obtain the current and voltage values between the second contact terminal 600 and the battery body 802.

[0119] In this embodiment, the second contact terminal 600 can adopt various port types to meet the connection requirements of different external devices. These port types include but are not limited to USB interfaces, D-Tap interfaces, Micro USB or USB-C interfaces, Type-C, and so on.

[0120] The second contact terminal 600 in this embodiment is mainly used to connect external devices to achieve charging and discharging of the battery.

[0121] The second electrical signal sampling circuit 500 is connected in series between the second contact terminal 600 and the battery body 802, and includes a high-side differential current sampling circuit and a high-side differential voltage sampling circuit.

[0122] High-side sampling refers to measuring current and voltage between the positive power supply and the load. Differential sampling obtains current and voltage information by measuring the voltage difference between two points. Specifically, the high-side differential sampling circuit places the sampling resistor R3 and the differential amplifier between the positive power supply and the load, calculates the current by measuring the voltage difference across the resistor, and measures the voltage through the voltage-dividing resistor network.

[0123] A sampling resistor R3 is connected in series between the second contact terminal 600 and the battery body 802, and the voltage difference across the sampling resistor R3 is measured by a differential amplifier to calculate the flowing current. At the same time, a voltage-dividing resistor network can also be used to divide the voltage between the second contact terminal 600 and the battery body 802, and the voltage difference at the voltage-dividing point is measured by a differential amplifier to calculate the voltage value.

[0124] In this way, the high-side differential sampling circuit can monitor the current and voltage changes during the charging and discharging process in real time, ensuring the timeliness and accuracy of the data. In addition, in low-side sampling, the current sampling resistor R3 is placed between the load and the ground, which will cause the ground potential to change. Especially in high-power devices, when the current is large, this change will be obvious, resulting in unstable ground potential of the device. However, the high-side sampling adopted in this embodiment places the sampling resistor R3 between the positive power supply and the load, keeping the ground potential stable and avoiding interference caused by ground potential changes.

[0125] Refer to Figure 5 andFigure 6 , Figure 5 is the circuit diagram of the online upgrade circuit in an embodiment of the present utility model. Figure 6 is the circuit diagram of the online upgrade circuit in an embodiment of the present utility model.

[0126] In this embodiment, the control circuit of the battery further includes an online upgrade circuit 700. The online upgrade circuit 700 includes a communication switching circuit 702 and a wireless communication chip U15. The communication switching circuit 702 is electrically connected between the wireless communication chip U15 and the main control chip 300. When the communication switching circuit 702 executes the upgrade program, it enables the main control chip 300 and the wireless communication chip U15 to perform data interaction.

[0127] In this embodiment, the control circuit of the battery further includes an online upgrade circuit 700. The online upgrade circuit 700 is used to realize the remote upgrade of the system, ensuring that the software of the battery control system always remains in the latest state. The online upgrade circuit 700 includes a communication switching circuit 702 and a wireless communication chip U15. The communication switching circuit 702 is electrically connected between the wireless communication chip U15 and the main control chip 300. When the upgrade program is executed, it enables the main control chip 300 and the wireless communication chip U15 to perform data interaction.

[0128] During the working process of online upgrade, the user can send an upgrade instruction to the wireless communication chip U15 through an external device (such as a tablet, mobile phone or computer). After receiving the upgrade instruction, the wireless communication chip U15 notifies the main control chip 300 to enter the upgrade mode through the communication switching circuit 702.

[0129] The communication switching circuit 702 switches to the upgrade mode, enabling the main control chip 300 and the wireless communication chip U15 to establish a direct data interaction channel.

[0130] In the upgrade mode, the external device sends the upgrade firmware file to the main control chip 300 through the wireless communication chip U15. This process can be carried out through wireless methods such as Bluetooth and WiFi. The wireless communication chip U15 transmits the received upgrade firmware file to the main control chip 300 through the communication switching circuit 702. The main control chip 300 receives and stores the upgrade firmware file, and at the same time performs verification and decoding to ensure the integrity and correctness of the data.

[0131] Then, the main control chip 300 gradually writes the new firmware into the memory or storage according to the preset upgrade process. During the upgrade process, the main control chip 300 monitors the writing status in real time to ensure that the firmware writing process is error-free. After the writing is completed, the main control chip 300 performs a system self-check to verify whether the upgraded firmware works properly. After verification, the main control chip 300 controls the system to restart.

[0132] By designing the online upgrade circuit 700, this embodiment can achieve remote upgrade. Users do not need to disassemble the device or manually update. They can complete the upgrade through wireless connection, which is simple and convenient to operate.

[0133] The present utility model further provides a battery for a camera device, which includes a housing 800, a battery body 802, and a circuit board 804. The circuit board 804 and the battery body 802 are arranged inside the housing 800. The control circuit of the aforementioned battery is provided on the circuit board 804. For the specific structure of the control circuit of this battery, refer to the above embodiments. Since the battery of the camera device adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0134] In this embodiment, by introducing an intelligent battery control circuit for the battery of the camera device, the management ability and safety performance of the battery are significantly improved. Through intelligent monitoring, overcurrent and overvoltage protection, online upgrade, and anti-interference design, the stability and safety of the battery in various working environments are ensured. At the same time, the support of multiple interfaces improves the user experience and device compatibility. These improvements provide a comprehensive and efficient solution for the battery of the camera device, making it show excellent performance and reliability in practical applications.

[0135] The above are only partial or preferred embodiments of the present utility model. Neither the text nor the drawings can limit the scope of protection of the present utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the concept of a whole with the present utility model, or any direct / indirect application in other related technical fields is included in the scope of protection of the present utility model.

Claims

1. A battery control circuit, characterized in that: include: A first contact terminal, electrically connected to the battery body, for charging or discharging the battery body; an access monitoring circuit, the access monitoring circuit comprising an on-off control circuit and a detection circuit, the on-off control circuit being electrically connected between the battery body and the first contact terminal; an input end of the detection circuit being electrically connected to the battery body, a detection end of the detection circuit being electrically connected to the first contact terminal, the detection circuit being used to generate a trigger signal when the first contact terminal is connected to an external device, the trigger signal being used to indicate whether an interface of the external device matches the first contact terminal; The main control chip is electrically connected to the control end of the on-off control circuit and the signal transmitting end of the detection circuit, respectively. When the main control chip receives the trigger signal through the signal transmitting end, it sends a control signal to the control end of the on-off control circuit to control the on-off control circuit to be turned on or off.

2. The battery control circuit according to claim 1, characterized in that: The detection circuit comprises: an output detection circuit, wherein the output detection circuit is electrically connected to the battery body, and an output end of the output detection circuit is electrically connected to the signal transmitting end; and / or An input detection circuit is electrically connected to the battery body, and an output end of the input detection circuit is electrically connected to the signal transmitting end.

3. The battery control circuit according to claim 2, characterized in that: The output detection circuit includes a first resistor, a first switch tube, a first diode and a first trigger end, one end of the first resistor and the emitter of the first switch tube are electrically connected to the battery body, the base of the first switch tube is electrically connected to the other end of the first resistor and the first contact terminal, the collector of the first switch tube is electrically connected to the anode of the first diode, and the cathode of the first diode is electrically connected to the output end of the output detection circuit.

4. The battery control circuit according to claim 3, characterized in that: The input detection circuit comprises: a second resistor, one end of which is electrically connected to the battery body and one end of the first resistor; a second switch tube, wherein the base of the second switch tube is electrically connected to the other end of the second resistor, the emitter of the second switch tube is electrically connected to the other end of the first resistor, and is electrically connected to the base of the first switch tube; A second diode, wherein an anode of the second diode is electrically connected to the collector of the second switch tube, and a cathode of the second diode is electrically connected to the output end of the input detection circuit.

5. The battery control circuit according to any one of claims 2 or 4, characterized in that: The main control chip includes a first control terminal; The on-off control circuit comprises: a third switch tube, wherein a drain of the third switch tube is electrically connected to the battery body; a fourth switch tube, wherein a source of the fourth switch tube is electrically connected to a source of the third switch tube, and a drain of the fourth switch tube is electrically connected to the first contact terminal; A switch driving module, wherein a control end of the switch driving module is connected to the first control end, a conducting end of the switch driving module is electrically connected to the gates of the third switch tube and the fourth switch tube, and another conducting end of the switch driving module is grounded.

6. The battery control circuit according to claim 5, characterized in that: The main control chip also includes a current acquisition terminal and a voltage acquisition terminal; The access monitoring circuit further includes a first electrical signal sampling circuit, and the first electrical signal sampling circuit includes: A current sampling circuit, electrically connected between the third switch tube and the fourth switch tube, for acquiring the current value between the third switch tube and the fourth switch tube, and feeding back the current value to the main control chip through the current acquisition terminal; The voltage sampling circuit is electrically connected between the third switch tube and the fourth switch tube, and is used to obtain the voltage value between the third switch tube and the fourth switch tube, and feed it back to the main control chip through the voltage acquisition terminal.

7. The battery control circuit according to claim 6, characterized in that: The current sampling circuit comprises: A sampling resistor is provided between the third switch tube and the fourth switch tube; An operational amplifier device, wherein the sampling terminals of the operational amplifier device are respectively electrically connected to the two ends of the sampling resistor, and are used to obtain the current at the two ends of the sampling resistor, amplify the current, and output the sampling current to the current acquisition terminal; The voltage sampling circuit comprises: Two voltage-dividing resistors are connected in series, one end of one of the two voltage-dividing resistors is electrically connected between the fourth switch tube and the first contact terminal, one end of the other is grounded, and the voltage acquisition end is electrically connected between the two voltage-dividing resistors for acquiring a voltage value.

8. The battery control circuit according to claim 1, characterized in that: The control circuit of the battery further includes a second contact terminal; The second electrical signal sampling circuit is connected in series between the second contact terminal and the battery body, and the second electrical signal sampling circuit is used to obtain the current and voltage values ​​between the second contact terminal and the battery body.

9. The battery control circuit according to claim 1, characterized in that: The control circuit of the battery also includes an online upgrade circuit, which includes a communication switching circuit and a wireless communication chip. The communication switching circuit is electrically connected between the wireless communication chip and the main control chip. When executing the upgrade program, the communication switching circuit allows the main control chip and the wireless communication chip to exchange data.

10. A battery for an imaging device, characterized in that: The invention comprises a shell, a battery body and a circuit board, wherein the circuit board and the battery body are arranged in the shell, and the control circuit of the battery according to any one of claims 1 to 9 is arranged on the circuit board.

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