Battery charging and discharging control device

Abstract

According to the battery charging and discharging control device, the first battery holder and the second battery holder are connected in parallel, so that it is guaranteed that a load can work without power interruption when a battery is replaced; when the battery is inserted into the first battery holder, the peripheral circuit responds to the high voltage of the first interface of the second battery holder, and the charging MOS tube corresponding to the second battery holder is turned off, so that circuit fire caused by mutual charging of batteries is avoided; the peripheral circuit responds to the discharge current of the second interface of the first battery holder, so that when the battery on the first battery holder is a high-voltage battery, the discharge MOS tube and the charge MOS tube corresponding to the first battery holder are conducted in a delayed manner, and when the battery on the first battery holder is a low-voltage battery, the discharge MOS tube corresponding to the first battery holder is conducted, and the charge MOS tube and the discharge MOS tube corresponding to the first battery holder are connected in a delayed manner. It is ensured that the battery normally supplies power to the load, a high-voltage battery is prevented from charging a low-voltage battery, and circuit fire is avoided.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to a battery charging and discharging control device. Background Art

[0002] As a product of the integration of artificial intelligence and load technology, with the development of computer technology, mechanical engineering, control theory and other disciplines, the research on robots has gradually moved from theoretical exploration to practical application. Nowadays, robots have become one of the research hotspots in the field of science and technology. However, the commercialization process of robots faces many challenges, especially the issue of how to charge robots and other loads, which requires us to conduct in-depth research and explore its development path.

[0003] The defects of the prior art are mainly manifested in two aspects. On the one hand, during the process of replacing the battery inside the load, it cannot be guaranteed that the load will work normally without power outage during the replacement process. On the other hand, when replacing the battery inside the load, a new high-voltage battery is placed inside the load, and the high-voltage battery will charge the low-voltage battery, causing the internal circuit to burn, thereby easily damaging the load.

[0004] Therefore, there are still many deficiencies in the prior art, and it is impossible to charge the load safely and effectively while ensuring that the load is powered on. Summary of the invention

[0005] The present application provides a battery charge and discharge control device to solve the problem in the prior art that it is impossible to charge the load safely and effectively while ensuring that the load is powered on.

[0006] In a first aspect, the present application provides a battery charge and discharge control device, comprising:

[0007] A battery holder, used to supply power to a load when a battery is inserted into the battery holder, the battery holder comprising a first battery holder and a second battery holder, the first battery holder and the second battery holder are connected in parallel, and the battery holder comprises a first interface and a second interface;

[0008] A peripheral circuit is connected to the battery holder, the peripheral circuit includes a discharge MOS tube and a charge MOS tube, and is used to control the discharge MOS tube and the charge MOS tube in the peripheral circuit by detecting the discharge current and voltage of the battery holder to supply power to the load;

[0009] When the battery is inserted into the first battery holder, the peripheral circuit turns off the charging MOS tube corresponding to the second battery holder in response to the high voltage of the first interface of the second battery holder, so that the battery of the second battery holder cannot be charged;

[0010] When the battery is inserted into the first battery holder, the peripheral circuit responds to the discharge current of the second interface of the first battery holder, so as to delay turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder when the battery on the first battery holder is a high-voltage battery, and to turn on the discharge MOS tube corresponding to the first battery holder when the battery on the first battery holder is a low-voltage battery, so that the battery of the first battery holder can supply power to the load.

[0011] Optionally, the battery holder further includes a load holder, the load holder includes a positive electrode and a negative electrode, and the first battery holder and the second battery holder include their corresponding third interface, fourth interface and fifth interface;

[0012] The first interface of the first battery holder is connected to the fourth interface of the second battery holder;

[0013] The first interface of the second battery holder is connected to the fourth interface of the first battery holder;

[0014] The third interface of the first battery holder is connected to the fourth interface of the first battery holder;

[0015] The third interface of the second battery holder is connected to the fourth interface of the second battery holder;

[0016] The third interface of the first battery holder is connected to the positive electrode of the load holder;

[0017] The third interface of the second battery holder is connected to the positive electrode of the load holder;

[0018] The fifth interface of the first battery holder is connected to the negative electrode of the load holder;

[0019] The fifth interface of the second battery holder is connected to the negative electrode of the load holder;

[0020] The first end of the discharge MOS tube is connected to the positive electrode of the load holder, the second end is connected to the first end of the charge MOS tube, and the third end is connected to the first end of the battery management unit;

[0021] The second end of the charging MOS tube is connected to the negative electrode of the load holder, and the third end is connected to the second end of the battery management unit.

[0022] Optionally, the peripheral circuit turns off the charging MOS tube corresponding to the second battery holder in response to the high voltage of the first interface of the second battery holder, so that the battery of the second battery holder cannot be charged, including:

[0023] The third interface of the first battery holder is short-circuited with the fourth interface thereof, and the fourth interface of the first battery holder outputs a high level;

[0024] The first interface of the second battery holder responds to the high level of the fourth interface of the first battery holder, and transmits the high level to the third end of the charging MOS tube corresponding to the second battery holder;

[0025] The third end of the charging MOS tube corresponding to the second battery holder responds to the high level, turns off the charging MOS tube corresponding to the second battery holder, so that the battery of the second battery holder cannot be charged.

[0026] Optionally, the second interface of the first battery holder is connected to the peripheral circuit;

[0027] The second interface of the second battery holder is connected to the peripheral circuit;

[0028] The peripheral circuit responds to the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, delays the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, and when the battery on the first battery holder is a low-voltage battery, conducts the discharge MOS tube corresponding to the first battery holder, so that the battery of the first battery holder supplies power to the load, including:

[0029] The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, outputs a first control signal to delay turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high-voltage battery of the first battery holder supplies power to the load;

[0030] The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a low-voltage battery, outputs a second control signal to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery of the first battery holder supplies power to the load and the low-voltage battery cannot be charged.

[0031] Optionally, the peripheral circuit further includes a microcontroller unit and a battery management unit;

[0032] The first end of the microcontroller unit is connected to the second interface of the first battery holder and the second interface of the second battery holder, and the second end is connected to the first end of the battery management unit;

[0033] The second end of the battery management unit is connected to the third end of the discharge MOS tube, and the third end is connected to the third end of the charge MOS tube;

[0034] The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, outputs a first control signal, delays the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high-voltage battery inserted into the first battery holder supplies power to the load, including:

[0035] The first end of the microcontroller unit sends a first control signal to the battery management unit according to the discharge current of the second interface of the first battery holder when the battery inserted in the first battery holder is a high-voltage battery, wherein the first control signal is a signal for delaying the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder;

[0036] The first end of the battery management unit responds to the first control signal, and the second end of the battery management unit delays outputting the discharge MOS tube voltage and the charge MOS tube voltage, and delays turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high voltage battery supplies power to the load through the first battery holder.

[0037] Optionally, the peripheral circuit further includes a microcontroller unit and a battery management unit;

[0038] The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a low-voltage battery, outputs a second control signal to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery inserted into the first battery holder supplies power to the load and the low-voltage battery cannot be charged, including:

[0039] The microcontroller unit sends a second control signal to the battery management unit according to the discharge current of the second interface of the first battery holder when the battery on the first battery holder is a low-voltage battery, wherein the second control signal is a signal for turning on the discharge MOS tube of the first battery holder;

[0040] The first end of the battery management unit responds to the second control signal, and the second end of the battery management unit outputs a discharge MOS tube voltage to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery supplies power to the load through the first battery holder and the low-voltage battery cannot be charged.

[0041] Optionally, the peripheral circuit further includes a microcontroller unit and a battery management unit;

[0042] The third end of the microcontroller unit is connected to the third end of the charging MOS tube;

[0043] When the battery management unit is defective, the first end of the microcontroller unit responds to the discharge current of the second interface of the battery holder, the third end of the microcontroller unit outputs the conduction charging MOS tube voltage, and transmits the conduction charging MOS tube voltage to the third end of the charging MOS tube;

[0044] The third end of the charging MOS tube turns on the charging MOS tube in response to the turned-on charging MOS tube voltage.

[0045] Optionally, the peripheral circuit includes a microcontroller unit and a battery management unit, when the power of the battery on the first battery holder and the power of the battery on the second battery holder are both lower than a preset threshold and cannot supply power to the load and the load is supplied with power through an external power supply;

[0046] When the power level of the battery on the first battery holder is greater than the power level of the battery on the second battery holder, the microcontroller unit sends a third control signal to the battery management unit according to the discharge current of the second interface of the first battery holder, wherein the third control signal is a signal for turning off the discharge MOS tube corresponding to the first battery holder;

[0047] The first end of the battery management unit outputs a turn-off discharge MOS tube voltage in response to the third control signal;

[0048] The third end of the discharge MOS tube responds to the turn-off discharge MOS tube voltage to turn off the discharge MOS tube corresponding to the first battery holder, so that the external power supply charges the battery on the first battery holder.

[0049] Optionally, the microcontroller unit sends a fourth control signal to the battery management unit, where the fourth control signal is a signal for turning on a charging MOS tube corresponding to the second battery holder;

[0050] The first end of the battery management unit outputs a charging MOS tube voltage in response to the fourth control signal;

[0051] The third end of the charging MOS tube responds to the turned-on charging MOS tube voltage to turn on the charging MOS tube corresponding to the second battery holder, and the charger charges the battery on the second battery holder.

[0052] Optionally, the battery charge and discharge control device is independently arranged outside the load to charge the load, or the battery charge and discharge control device is arranged inside the load to charge the load.

[0053] The present application relates to a battery charge and discharge control device. The present application connects a first battery holder and a second battery holder in parallel, which is beneficial to ensuring that the load can work without interruption when the battery is replaced; when the battery is inserted into the first battery holder, the peripheral circuit responds to the high voltage of the first interface of the second battery holder and turns off the charging MOS tube corresponding to the second battery holder, which is beneficial to avoiding the circuit fire caused by mutual charging of batteries; the peripheral circuit responds to the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, the discharge MOS tube and the charging MOS tube corresponding to the first battery holder are delayed to be turned on, and when the battery on the first battery holder is a low-voltage battery, the discharge MOS tube corresponding to the first battery holder is turned on, which is beneficial to ensuring that the battery supplies power to the load normally and preventing the high-voltage battery from charging the low-voltage battery, thereby avoiding the circuit fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0056] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0057] Figure 1 A schematic diagram of a first embodiment of a battery charge and discharge control device provided in the present application;

[0058] Figure 2 A schematic diagram of a first embodiment of a battery charge and discharge control device provided by the present application connected to a load;

[0059] Figure 3 A schematic diagram of a second embodiment of the battery charge and discharge control device provided in the present application;

[0060] Figure 4 A schematic diagram of a second embodiment of the battery charge and discharge control device provided in the present application connected to a load. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0062] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0063] In order to solve the problems in the prior art, the present application provides a battery charging and discharging control device

[0064] Figure 1 This is a schematic diagram of a first embodiment of a battery charge and discharge control device provided in the present application, the device comprising:

[0065] A battery holder, used to supply power to a load when a battery is inserted into the battery holder, the battery holder comprising a first battery holder and a second battery holder, the first battery holder and the second battery holder are connected in parallel, and the battery holder comprises a first interface and a second interface;

[0066] A peripheral circuit is connected to the battery holder, the peripheral circuit includes a discharge MOS tube and a charge MOS tube, and is used to control the discharge MOS tube and the charge MOS tube in the peripheral circuit by detecting the discharge current and voltage of the battery holder to supply power to the load;

[0067] When the battery is inserted into the first battery holder, the peripheral circuit turns off the charging MOS tube corresponding to the second battery holder in response to the high voltage of the first interface of the second battery holder, so that the battery of the second battery holder cannot be charged;

[0068] When the battery is inserted into the first battery holder, the peripheral circuit responds to the discharge current of the second interface of the first battery holder, so as to delay turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder when the battery on the first battery holder is a high-voltage battery, and to turn on the discharge MOS tube corresponding to the first battery holder when the battery on the first battery holder is a low-voltage battery, so that the battery of the first battery holder can supply power to the load.

[0069] In the embodiments of the present application, the load may be a load terminal that can be charged in various fields such as robots and electric vehicles, and is not specifically limited here.

[0070] In the embodiment of the present application, the battery holder is also called a battery box, a battery compartment or a battery holder. It is a key component in an electronic device for fixing batteries and providing electrical connections, and is usually in the form of a male and female holder. In the embodiment of the present application, an external battery is inserted into the battery holder to supply power to the load. The prior art usually uses a single battery to supply power to the load. When the power supply battery is out of power and the battery is removed and replaced with a new battery, the load will be directly powered off because there is only a single battery supplying power. In order to prevent the load from being powered off during the battery replacement process in the present application, two batteries are required to be connected in parallel and supply power to the load together in the embodiment of the present application. In view of this, the present application also requires the corresponding two battery holders to be the first battery holder and the second battery holder respectively. It should be noted that the internal structures of the first battery holder and the second battery holder in the present application are exactly the same, and the two batteries are connected in parallel to supply power to the load together through the parallel relationship between the first battery holder and the second battery holder.

[0071] In a possible implementation, the battery holder of the battery charge and discharge control device also includes a load holder, which generally refers to a load base, and is one of the key components in the load architecture. It is generally composed of core components such as a chassis, a motor, and a driver, and provides a stable foundation for the load, so that it can move, locate, and perform tasks freely. The load holder includes a positive pole, a negative pole, and two signal interfaces, wherein CAN-H and CAN-L are two different signal lines in the CAN bus, and the CAN bus is a serial communication protocol. CAN-H refers to the high-level signal line in the CAN bus, and its voltage range is 2.5V to 3.3V, and CAN-L refers to the low-level signal line in the CAN bus, and its voltage range is 0V to 0.5V. The communication in the CAN bus is transmitted through the differential signal between CAN-H and CAN-L. When CAN-H is high, CAN-L is low, and vice versa. The transmission mode of the differential signal can effectively reduce signal interference and noise, and improve the reliability and anti-interference ability of the signal. In other embodiments, RS-485 serial bus or serial port communication can also be used as a signal line.

[0072] Optionally, the battery holder also includes a load holder, the load holder includes a positive pole and a negative pole, the first battery holder and the second battery holder include their corresponding first interface, second interface, third interface, fourth interface and fifth interface; the first interface of the first battery holder is connected to the fourth interface of the second battery holder; the first interface of the second battery holder is connected to the fourth interface of the first battery holder; the third interface of the first battery holder is connected to the fourth interface of the first battery holder; the third interface of the second battery holder is connected to the fourth interface of the second battery holder; the third interface of the first battery holder is connected to the positive pole of the load holder; the third interface of the second battery holder is connected to the positive pole of the load holder; the fifth interface of the first battery holder is connected to the negative pole of the load holder; the fifth interface of the second battery holder is connected to the negative pole of the load holder.

[0073] like Figure 1 As shown, Figure 1 This is a schematic diagram of the first embodiment of the battery charge and discharge control device provided by the present application. Each battery holder includes seven interfaces. In the embodiment of the present application, A1-A7 represent the first interface to the seventh interface of the first battery holder, and B1-B7 represent the first interface to the seventh interface of the second battery holder. When no load is connected, A6, A7, B2, B6, and B7 are connected to the microcontroller unit respectively, B1 is connected to the gate of the charging MOS tube, A3, A4, B3, and B4 are used to connect to the positive pole of the load holder, and A5 and B5 are used to connect to the negative pole of the load holder.

[0074] like Figure 2 As shown, when connected to the load seat, it can be achieved through the following scheme: A1 is connected to B4, B1 is connected to A4, A2 is connected to A3, B2 is connected to B3, A3 and B3 are connected to the positive pole of the load seat, A5 and B5 are connected to the negative pole of the load seat, A6 and B6 can be connected to the microcontroller unit through the CAN-H signal interface on the load seat, and A7 and B7 can be connected to the microcontroller unit through the CAN-L signal interface on the load seat.

[0075] In the embodiment of the present application, the function of each interface is different, wherein the first interface is used to sense a high level to turn off the charging MOS tube, the second interface is used to sense the discharge current, the third interface is used to connect to the positive pole, the fourth interface is a detection seat for detecting relevant parameters, the fifth interface is used to connect to the negative pole, the sixth interface is used to connect to the CAN-H signal interface through the CAN-H signal line to transmit signals, and the seventh interface is used to connect to the CAN-L signal interface through the CAN-L signal line to transmit signals.

[0076] In an embodiment of the present application, the peripheral circuit includes a discharge MOS tube and a charge MOS tube, which are used to connect to the battery holder, and control the discharge MOS tube and the charge MOS tube in the peripheral circuit to be turned on or off by detecting the discharge current and voltage of the interface on the battery holder.

[0077] Optionally, the first end of the discharge MOS tube is connected to the positive electrode of the load seat, and the second end is connected to the first end of the charge MOS tube; the second end of the charge MOS tube is connected to the negative electrode of the load seat;

[0078] The fourth interface of the first battery holder outputs a high level; the first interface of the second battery holder responds to the high level of the fourth interface of the first battery holder, and transmits the high level to the third end of the charging MOS tube corresponding to the second battery holder; the third end of the charging MOS tube corresponding to the second battery holder responds to the high level, turns off the charging MOS tube corresponding to the second battery holder, and makes the battery of the second battery holder unable to be charged.

[0079] In the process of actual application, due to the different factory settings of the batteries, the initial voltages of the two parallel batteries are also different, or when the two parallel batteries discharge to the load at the same time, the discharge rates are different, which will eventually cause the two parallel batteries to have different power levels, forming a situation where one has high power and the other has low power. In another application scenario, when the batteries in parallel inside the load are lower than the preset battery power threshold, the two batteries are about to run out of power and cannot supply power to the load. At this time, in the embodiment of the present application, it is necessary to remove one of the batteries and replace the removed battery with a new battery. At this time, the battery newly replaced to the load has a high power level, and the battery that is about to run out of power inside the load has a very low power level, which also forms a situation where one has high power and one has low power. For a battery, the higher its own power level is when it is connected to the circuit, the higher the voltage across the battery. Due to the existence of a high-power battery and a low-power battery, the high-voltage high-power battery will charge the low-voltage low-power battery. If the power levels of the two batteries are not much different, that is, the voltages across the two batteries are not much different, the two batteries will charge each other. Both charging situations will cause the circuit to catch fire and damage the internal circuit of the load.

[0080] It should be noted that in the embodiments of the present application, all high-voltage batteries and low-voltage batteries only refer to two parallel batteries. The battery with relatively high power is a high-voltage battery, and the battery with relatively low power is a low-power battery. There is no clear definition of the high and low thresholds of the battery power.

[0081] It should be noted that, in this application, since the first battery holder and the second battery holder are the same, when the battery is inserted into any battery holder, the peripheral circuit will detect the discharge current and voltage at the interface on the battery holder, and claim 1 corresponds to Figure 1Taking the example of when the battery is inserted into the first battery holder, the peripheral circuit responds to the high voltage of the first interface of the second battery holder and turns off the charging MOS tube corresponding to the second battery holder, so that the battery inserted into the second battery holder cannot be charged.

[0082] like Figure 3 As shown, Figure 3 The second embodiment of the battery charge and discharge control device provided for the present application illustrates that, when no load is connected, A6, A7, A2, B6, and B7 are respectively connected to the microcontroller unit, A1 is connected to the gate of the charging MOS tube, A3, A4, B3, and B4 are used to be connected to the positive pole of the load seat, and A5 and B5 are used to be connected to the negative pole of the load seat.

[0083] like Figure 4 As shown, when connected to the load seat, it can be achieved through the following scheme: A1 is connected to B4, B1 is connected to A4, A2 is connected to A3, B2 is connected to B3, A3 and B3 are connected to the positive pole of the load seat, A5 and B5 are connected to the negative pole of the load seat, A6 and B6 can be connected to the microcontroller unit through the CAN-H signal interface on the load seat, and A7 and B7 can be connected to the microcontroller unit through the CAN-L signal interface on the load seat.

[0084] Taking the case where the battery is inserted into the second battery holder as an example, when the battery is inserted into the second battery holder, the peripheral circuit responds to the high voltage of the first interface of the first battery holder and turns off the charging MOS tube corresponding to the first battery holder, so that the battery of the first battery holder cannot be charged.

[0085] For example: the battery inside the load is A1B1, A1 is inserted into the first battery holder, and B1 is inserted into the second battery holder. At this time, since batteries A1 and B1 are out of power, batteries A2 and B2 outside the load need to be used to replace A1 and B1. First, take out any battery A1 or B1, and replace one of them with A2 or B2. For example, remove battery A1 from the first battery holder and replace battery A2. At this time, since A2 is a new battery, B1 in the second battery holder is an old battery that has not been taken out of the load. The power of A2 is greater than that of B1, and the voltage across A2 is greater than the voltage across B1. In this case, A2 in the first battery holder is a high-voltage battery, and B1 in the second battery holder is a low-voltage battery. In the prior art, the high-voltage battery A2 will charge the low-voltage battery B1, causing the circuit to catch fire.

[0086] In view of this, an embodiment of the present application provides an interlocking scheme. In the case of replacing the battery, when the external high-voltage battery of the load is just connected to any battery holder, the voltage of the first interface of the battery holder is detected through the peripheral circuit. When it is determined that the new battery is powered on, the corresponding charging MOS tube of the other battery holder in the peripheral circuit is turned off to prevent the new battery from charging the low-power battery on another existing battery holder through the parallel relationship between the battery holder and the other battery holder. At the same time, the peripheral circuit will also turn off the charging MOS tube of the battery holder according to the voltage of the first interface of the other battery holder to prevent the voltage difference between the new battery and the existing old battery from being small, and the old battery will also charge the new battery and cause mutual charging. Therefore, when the battery is connected to the battery holder. That is, when the battery is connected to the first battery holder, the high level of the first interface of the second battery holder is detected, and the charging MOS tube corresponding to the second battery holder is turned off. When the battery is connected to the second battery holder, the high level of the first interface of the first battery holder is detected, and the charging MOS tube corresponding to the first battery holder is turned off, thereby realizing the interlocking of the first battery holder and the second battery holder, and turning off the charging MOS tubes corresponding to the two battery holders to prevent the battery from charging each other and causing the circuit to catch fire, thereby damaging the internal circuit of the load.

[0087] Specifically, the interlocking occurs between the first battery holder and the second battery holder because the third interface and the fourth interface of the first battery holder are short-circuited when power is turned on. Since the third interface and the fourth interface are short-circuited, the short-circuit voltage at the fourth interface is a high level. Since the fourth interface of the first battery holder is connected to the first interface of the second battery holder, the first interface of the second battery holder is also sensed as a high level. The first interface of the second battery holder is connected to the gate of the charging MOS tube corresponding to itself. In the embodiment of the present application, the charging MOS tube is a P-channel MOS tube. When the gate voltage of the P-channel MOS tube is greater than the high voltage of the preset voltage, the charging MOS tube is disconnected, thereby turning off the charging MOS tube corresponding to the second battery holder, so that the battery on the second battery holder cannot be charged.

[0088] Similarly, the third interface and the fourth interface of the second battery holder are short-circuited when power is turned on. Since the third interface and the fourth interface are short-circuited, the short-circuit voltage at the fourth interface is high. Since the fourth interface of the second battery holder is connected to the first interface of the first battery holder, the first interface of the first battery holder is also sensed as a high level. The first interface of the first battery holder is connected to the gate of the charging MOS tube corresponding to itself. In the embodiment of the present application, the charging MOS tube is a P-channel MOS tube. When the gate voltage of the P-channel MOS tube is greater than the high voltage of the preset voltage, the charging MOS tube is disconnected, thereby turning off the charging MOS tube corresponding to the first battery holder, so that the battery on the first battery holder cannot be charged.

[0089] For example, Figure 1 As shown, A3 and A4 of the first battery carrier are short-circuited when powered on, so A4 is a short-circuited high level. Since A4 is connected to B1 of the second battery carrier, B1 also responds to a high level. B1 is connected to the gate of the charging MOS tube corresponding to the second battery carrier in the peripheral circuit. The charging MOS tube is a P-channel charging MOS tube. When the gate voltage is higher than the preset voltage, the charging MOS tube is turned off, thereby turning off the charging MOS tube corresponding to the second battery carrier. B3 and B4 of the second battery carrier are short-circuited when powered on, so B4 is a short-circuited high level. Since B4 is connected to A1 of the first battery carrier, A1 also responds to a high level. A1 is connected to the gate of the charging MOS tube corresponding to the first battery carrier in the peripheral circuit. The charging MOS tube is a P-channel charging MOS tube. When the gate voltage is higher than the preset voltage, the charging MOS tube is turned off, thereby turning off the charging MOS tube corresponding to the first battery carrier.

[0090] It should be noted that in the embodiment of the present application, since the first battery holder and the second battery holder are exactly the same, A1 can also be inserted into the second battery holder, and B1 can also be inserted into the first battery holder, and no specific limitation is made here.

[0091] In an embodiment of the present application, when the battery is just inserted into the battery holder, it is necessary to detect the voltage through the first interface to interlock the first battery holder and the second battery holder, and after the charging MOS tubes corresponding to the first battery holder and the second battery holder are turned off to prevent mutual charging, the discharging MOS tubes corresponding to the first battery holder and the second battery holder must also be turned on, so that the battery supplies power to the load through the first battery holder and the second battery holder. This section will take the first battery holder as an example and introduce two situations.

[0092] Turning on the charging MOS tube and the discharging MOS tube requires a peripheral circuit to determine the level of power of the battery inserted in the battery holder. Since turning on the discharging MOS tube and the charging MOS tube corresponds to the battery holder, the peripheral circuit detects the discharge current on the second interface of the first battery holder and turns on the charging MOS tube and the discharging MOS tube corresponding to the first battery holder. Similarly, the discharge current on the second interface of the second battery holder is detected and the charging MOS tube and the discharging MOS tube corresponding to the second battery holder are turned on. Therefore, in this embodiment, the first battery holder is taken as an example, and the principle of the second battery holder is applicable to both, and it is also necessary to first determine the level of power of the battery inserted in the battery holder.

[0093] The second interface of the first battery holder is connected to the peripheral circuit; the second interface of the second battery holder is connected to the peripheral circuit;

[0094] The first case: the peripheral circuit detects the discharge current of the second interface of the first battery holder. When the battery on the first battery holder is a high-voltage battery, the first control signal is output to delay the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high-voltage battery of the first battery holder supplies power to the load.

[0095] The second situation: the peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a low-voltage battery, it outputs a second control signal to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery of the first battery holder supplies power to the load and the low-voltage battery cannot be charged.

[0096] Specifically, in the case of the first type of high-voltage battery inserted into the first battery holder, the peripheral circuit further includes a microcontroller unit and a battery management unit; the first end of the microcontroller unit is connected to the second interface of the first battery holder and the second interface of the second battery holder, and the second end is connected to the first end of the battery management unit; the second end of the battery management unit is connected to the third end of the discharge MOS tube, and the third end is connected to the third end of the charging MOS tube;

[0097] The first end of the microcontroller unit sends a first control signal to the battery management unit according to the discharge current of the second interface of the first battery holder when the battery inserted in the first battery holder is a high-voltage battery, wherein the first control signal is a signal for delaying the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder;

[0098] The first end of the battery management unit responds to the first control signal, and the second end of the battery management unit delays outputting the discharge MOS tube voltage and the charge MOS tube voltage, and delays turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high voltage battery supplies power to the load through the first battery holder.

[0099] In an embodiment of the present application, the peripheral circuit includes a microcontroller unit and a battery management unit, wherein the microcontroller unit may be an MCU processor, which is a single-chip computer system that integrates a processor core, memory, and peripheral interfaces. The MCU processor also supports the CAN protocol, which is a bus-based communication protocol used for data communication between control units. In the present application, it is used to output a control signal to the battery control unit when the discharge current and voltage of the battery holder are detected.

[0100] The battery control unit can be an AFE chip. AFE is a special integrated circuit for processing analog signals. The AFE chip contains a BMS system (Battery Management System), which is an electronic system for monitoring, managing and protecting batteries. When the BMS system receives a control signal from CAN, it outputs an on or off voltage to turn on or off the charging MOS tube and the discharging MOS tube connected to the AFE chip.

[0101] When the microcontroller unit simultaneously detects the discharge current of the second interface of the first battery holder, when the battery inserted in the first battery holder is a high-voltage battery, the microcontroller unit outputs a first control signal, and sends the first control signal to the AFE chip. The AFE chip responds to the first control signal and delays the output of the discharge MOS tube voltage and the charge MOS tube voltage. The gates of the discharge MOS tube and the charge MOS tube act on the discharge MOS tube voltage and the charge MOS tube voltage, and delay the discharge MOS tube and the charge MOS tube corresponding to the first battery holder. Delaying the discharge MOS tube and the charge MOS tube corresponding to the battery holder into which the high-voltage battery is inserted is conducive to ensuring that the battery can normally supply power to the load and dissipate heat, thereby extending the battery life.

[0102] Specifically, in the case of the second low-voltage battery inserted into the first battery holder, the microcontroller unit sends a second control signal to the battery management unit according to the discharge current of the second interface of the first battery holder when the battery on the first battery holder is a low-voltage battery, and the second control signal is a signal for turning on the discharge MOS tube of the first battery holder;

[0103] The first end of the battery management unit responds to the second control signal, and the second end of the battery management unit outputs a discharge MOS tube voltage to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery supplies power to the load through the first battery holder and the low-voltage battery cannot be charged.

[0104] In the embodiment of the present application, when the microcontroller unit simultaneously detects the discharge current of the second interface of the first battery holder, when the battery inserted in the first battery holder is a high-voltage battery, the second control signal is output, and the second control signal is sent to the AFE chip. The AFE chip responds to the second control signal and only outputs the discharge MOS tube voltage. The gate of the discharge MOS tube acts on the discharge MOS tube voltage to turn on the discharge MOS tube corresponding to the first battery holder. Directly turning on the discharge MOS tube corresponding to the battery holder where the low-voltage battery is inserted, and not turning on the charging MOS tube corresponding to the battery holder where the low-voltage battery is inserted, is conducive to ensuring that the battery supplies power to the load while preventing the high-voltage battery from charging the low-voltage battery, causing the circuit to catch fire and damage the load.

[0105] In a possible implementation, the third end of the microcontroller unit is connected to the third end of the charging MOS tube; when the battery management unit is faulty, the first end of the microcontroller unit responds to the discharge current of the second interface of the battery holder, and the third end of the microcontroller unit outputs the turned-on charging MOS tube voltage and transmits the turned-on charging MOS tube voltage to the third end of the charging MOS tube; the third end of the charging MOS tube responds to the turned-on charging MOS tube voltage to turn on the charging MOS tube.

[0106] When the BMS system of the AFE chip cannot work properly, the microcontroller unit of the peripheral circuit also includes a dual-electric charging control port, and the dual-electric charging control port of the microcontroller outputs a conductive charging MOS tube to control the discharge MOS tube. The first end of the microcontroller unit detects the discharge current of the second interface of the battery holder, outputs a conductive charging MOS tube voltage through the CAN protocol, and transmits the conductive charging MOS tube voltage to the gate of the charging MOS tube, and the gate of the charging MOS tube is turned on in response to the conductive charging MOS tube. It is beneficial to manage the charging MOS tube through the microcontroller unit including a dual-electric charging control port when the BMS system of the AFE chip cannot work properly, so that the battery can normally supply power to the load.

[0107] In another possible implementation manner, the peripheral circuit further includes a pre-discharge MOS tube. When the battery is connected to the battery holder and powered on, the pre-discharge MOS tube remains turned on. Only when the pre-discharge MOS tube remains turned on can the discharge current be detected in the peripheral circuit. In the embodiment of the present application, the discharge MOS tube that is turned on and off is the main discharge MOS tube, and the pre-discharge MOS tube remains turned on to ensure that the discharge current can be detected in the peripheral circuit.

[0108] There is another possible implementation method. In the embodiment of the present application, when the two parallel batteries supplying power to the load are out of power, the present invention also provides a charging method. There is no need to remove the batteries on the first battery holder and the second battery holder and replace them with new batteries. Instead, the first battery holder and the second battery holder are connected by a charger to charge the batteries on the first battery holder and the second battery holder. At the same time, in order to prevent the discharge speed of the battery from being greater than the charging speed during the charging process, which will cause the load to be powered off and stop working, the charger will simultaneously supply power to the load to ensure that the load can work without interruption while the battery is being charged.

[0109] Specifically, when the power of the battery on the first battery holder and the power of the battery on the second battery holder are both lower than a preset threshold and cannot supply power to the load, and the load is supplied with power through an external power supply;

[0110] When the power level of the battery on the first battery holder is greater than the power level of the battery on the second battery holder, the microcontroller unit sends a third control signal to the battery management unit according to the discharge current of the second interface of the first battery holder, wherein the third control signal is a signal for turning off the discharge MOS tube corresponding to the first battery holder;

[0111] The first end of the battery management unit outputs a turn-off discharge MOS tube voltage in response to the third control signal;

[0112] The third end of the discharge MOS tube responds to the turn-off discharge MOS tube voltage to turn off the discharge MOS tube corresponding to the first battery holder, so that the external power supply charges the battery on the first battery holder.

[0113] Further, the microcontroller unit sends a fourth control signal to the battery management unit, wherein the fourth control signal is a signal for turning on a charging MOS tube corresponding to the second battery holder;

[0114] The first end of the battery management unit outputs a charging MOS tube voltage in response to the fourth control signal;

[0115] The third end of the charging MOS tube responds to the turned-on charging MOS tube voltage to turn on the charging MOS tube corresponding to the second battery holder, and the charger charges the battery on the second battery holder.

[0116] In the embodiment of the present application, the charger first charges the high-voltage battery. Since in the case of two batteries being connected in parallel and discharging to the load together, only the charging MOS tube of the battery holder corresponding to the high-voltage battery is turned on, and the charging MOS tube of the battery holder corresponding to the low-voltage battery is turned off to prevent being charged, the microcontroller unit can only output a third control signal to first turn off the discharge MOS tube corresponding to the battery holder of the high-voltage battery and let the charger charge the high-voltage battery. When the high-voltage battery is charged to a preset power level, the microcontroller unit outputs a fourth control signal to turn on the charging MOS tube corresponding to the battery holder of the low-voltage battery to charge the low voltage. At the same time, since the discharge MOS tube corresponding to the battery holder of the high-voltage battery is turned off, the high-voltage battery cannot charge the low-voltage battery, which effectively prevents the circuit fire caused by mutual charging of batteries. When the low-voltage battery is charged to the same power level as the high-voltage battery, the charging MOS tubes of the two batteries are turned on at the same time, and the charger charges the two batteries at the same time until the batteries are full.

[0117] It should be noted that the battery charge and discharge control device in the present application can be a device independently arranged outside the load to charge the load, or can be a device arranged inside the load to charge the load, and no specific limitation is made here.

[0118] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0119] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0120] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0121] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A battery charge and discharge control device, characterized in that: The device comprises: A battery holder, used to supply power to a load when a battery is inserted into the battery holder, the battery holder comprising a first battery holder and a second battery holder, the first battery holder and the second battery holder are connected in parallel, and the battery holder comprises a first interface and a second interface; A peripheral circuit is connected to the battery holder, the peripheral circuit includes a discharge MOS tube and a charge MOS tube, and is used to control the discharge MOS tube and the charge MOS tube in the peripheral circuit by detecting the discharge current and voltage of the battery holder to supply power to the load; When the battery is inserted into the first battery holder, the peripheral circuit turns off the charging MOS tube corresponding to the second battery holder in response to the high voltage of the first interface of the second battery holder, so that the battery of the second battery holder cannot be charged; When the battery is inserted into the first battery holder, the peripheral circuit responds to the discharge current of the second interface of the first battery holder, so as to delay turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder when the battery on the first battery holder is a high-voltage battery, and to turn on the discharge MOS tube corresponding to the first battery holder when the battery on the first battery holder is a low-voltage battery, so that the battery of the first battery holder can supply power to the load.

2. The battery charge and discharge control device according to claim 1, characterized in that: The battery holder also includes a load holder, the load holder includes a positive electrode and a negative electrode, the first battery holder and the second battery holder include their corresponding third interface, fourth interface and fifth interface; The first interface of the first battery holder is connected to the fourth interface of the second battery holder; The first interface of the second battery holder is connected to the fourth interface of the first battery holder; The third interface of the first battery holder is connected to the positive electrode of the load holder; The third interface of the second battery holder is connected to the positive electrode of the load holder; The fifth interface of the first battery holder is connected to the negative electrode of the load holder; The fifth interface of the second battery holder is connected to the negative electrode of the load holder; The first end of the discharge MOS tube is connected to the positive electrode of the load holder, the second end is connected to the first end of the charge MOS tube, and the third end is connected to the first end of the battery management unit; The second end of the charging MOS tube is connected to the negative electrode of the load holder, and the third end is connected to the second end of the battery management unit.

3. The battery charge and discharge control device according to claim 2, characterized in that: The peripheral circuit, in response to the high voltage of the first interface of the second battery holder, turns off the charging MOS tube corresponding to the second battery holder so that the battery of the second battery holder cannot be charged, including: The fourth interface of the first battery holder outputs a high level; The first interface of the second battery holder responds to the high level of the fourth interface of the first battery holder, and transmits the high level to the third end of the charging MOS tube corresponding to the second battery holder; The third end of the charging MOS tube corresponding to the second battery holder responds to the high level, turns off the charging MOS tube corresponding to the second battery holder, so that the battery of the second battery holder cannot be charged.

4. The battery charge and discharge control device according to claim 1, characterized in that: The second interface of the first battery holder is connected to the peripheral circuit; The second interface of the second battery holder is connected to the peripheral circuit; The peripheral circuit responds to the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, delays the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, and when the battery on the first battery holder is a low-voltage battery, conducts the discharge MOS tube corresponding to the first battery holder, so that the battery of the first battery holder supplies power to the load, including: The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, outputs a first control signal to delay turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high-voltage battery of the first battery holder supplies power to the load; The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a low-voltage battery, outputs a second control signal to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery of the first battery holder supplies power to the load and the low-voltage battery cannot be charged.

5. The battery charge and discharge control device according to claim 4, characterized in that: The peripheral circuit also includes a microcontroller unit and a battery management unit; The first end of the microcontroller unit is connected to the second interface of the first battery holder and the second interface of the second battery holder, and the second end is connected to the first end of the battery management unit; The second end of the battery management unit is connected to the third end of the discharge MOS tube, and the third end is connected to the third end of the charge MOS tube; The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a high-voltage battery, outputs a first control signal, delays the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high-voltage battery of the first battery holder supplies power to the load, including: The first end of the microcontroller unit sends a first control signal to the battery management unit according to the discharge current of the second interface of the first battery holder when the battery inserted in the first battery holder is a high-voltage battery, wherein the first control signal is a signal for delaying the conduction of the discharge MOS tube and the charge MOS tube corresponding to the first battery holder; The first end of the battery management unit responds to the first control signal, and the second end of the battery management unit delays outputting the discharge MOS tube voltage and the charge MOS tube voltage, and delays turning on the discharge MOS tube and the charge MOS tube corresponding to the first battery holder, so that the high voltage battery supplies power to the load through the first battery holder.

6. The battery charge and discharge control device according to claim 4, characterized in that: The peripheral circuit also includes a microcontroller unit and a battery management unit; The peripheral circuit detects the discharge current of the second interface of the first battery holder, and when the battery on the first battery holder is a low-voltage battery, outputs a second control signal to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery inserted into the first battery holder supplies power to the load and the low-voltage battery cannot be charged, including: The microcontroller unit sends a second control signal to the battery management unit according to the discharge current of the second interface of the first battery holder when the battery on the first battery holder is a low-voltage battery, wherein the second control signal is a signal for turning on the discharge MOS tube of the first battery holder; The first end of the battery management unit responds to the second control signal, and the second end of the battery management unit outputs a discharge MOS tube voltage to turn on the discharge MOS tube corresponding to the first battery holder, so that the low-voltage battery supplies power to the load through the first battery holder and the low-voltage battery cannot be charged.

7. The battery charge and discharge control device according to claim 1, characterized in that: The peripheral circuit also includes a microcontroller unit and a battery management unit; The third end of the microcontroller unit is connected to the third end of the charging MOS tube; When the battery management unit is defective, the first end of the microcontroller unit responds to the discharge current of the second interface of the battery holder, the third end of the microcontroller unit outputs the conduction charging MOS tube voltage, and transmits the conduction charging MOS tube voltage to the third end of the charging MOS tube; The third end of the charging MOS tube turns on the charging MOS tube in response to the turned-on charging MOS tube voltage.

8. The battery charge and discharge control device according to claim 1, characterized in that: The peripheral circuit includes a microcontroller unit and a battery management unit. When the power of the battery on the first battery holder and the power of the battery on the second battery holder are both lower than a preset threshold and cannot supply power to the load, the load is supplied with power through an external power supply; When the power level of the battery on the first battery holder is greater than the power level of the battery on the second battery holder, the microcontroller unit sends a third control signal to the battery management unit according to the discharge current of the second interface of the first battery holder, wherein the third control signal is a signal for turning off the discharge MOS tube corresponding to the first battery holder; The first end of the battery management unit outputs a turn-off discharge MOS tube voltage in response to the third control signal; The third end of the discharge MOS tube responds to the turn-off discharge MOS tube voltage to turn off the discharge MOS tube corresponding to the first battery holder, so that the external power supply charges the battery on the first battery holder.

9. The battery charge and discharge control device according to claim 8, characterized in that: The microcontroller unit sends a fourth control signal to the battery management unit, wherein the fourth control signal is a signal for turning on the charging MOS tube corresponding to the second battery holder; The first end of the battery management unit outputs a charging MOS tube voltage in response to the fourth control signal; The third end of the charging MOS tube responds to the turned-on charging MOS tube voltage to turn on the charging MOS tube corresponding to the second battery holder, and the charger charges the battery on the second battery holder.

10. The battery charge and discharge control device according to claims 1-9, characterized in that: The battery charge and discharge control device is a device independently arranged outside the load to charge the load, or the battery charge and discharge control device is a device arranged inside the load to charge the load.

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