Battery manager, power supply module, power supply system and automobile

Abstract

The utility model discloses a battery manager, a power supply module, a power supply system and an automobile, the battery manager comprises a first switch circuit, a first detection module and a first controller; the first switching circuit is arranged between the battery module and the first connecting end; the first detection module is connected with the battery module and is used for detecting battery cell actual measurement data of the battery module; and the first controller is connected with the first detection module and the first switching circuit and is used for controlling the first switching circuit to work according to the measured data of the battery cell. According to the battery manager, the first detection module is adopted in the power supply module to detect the battery cell measured data of each battery cell in the battery module, so that reliable charging and discharging of the whole battery system during use can be controlled, the situation that the battery system exceeds a safe working area is avoided, the cruising ability of a product is optimized, and the service life of the battery is prolonged to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, in particular to a battery manager, a power module, a power system and an automobile. Background Art

[0002] With the continuous development of new energy technologies, high-energy-density battery modules are widely used in various new energy products. However, various environmental factors, such as high temperature and low temperature, and improper usage conditions, such as overcharging and over-discharging, are likely to cause faults or aging of the battery cells in the battery module, affecting battery efficiency and posing safety hazards.

[0003] In the prior art, by setting a battery manager, the state of the battery module can be monitored, the utilization rate of the battery can be improved, overcharging and over-discharging of the battery can be prevented, and the service life of the battery can be extended. However, the battery manager generally only collects battery data and sends the collected battery data to the vehicle-mounted controller, and controls the charging and discharging of the battery module based on the control of the vehicle-mounted controller. This control method is limited by the control of the vehicle-mounted controller. When there is a communication fault or other problems between the vehicle-mounted controller and the battery manager, the charging and discharging control cannot be performed in a timely manner, and the control effect is not good. Summary of the Utility Model

[0004] Embodiments of the utility model provide a battery manager, a power module, a power system and an automobile to solve the problem of poor control effect of charging and discharging control of the battery module.

[0005] Embodiments of the utility model provide a battery manager, including a first switch circuit, a first detection module and a first controller;

[0006] The first switch circuit is arranged between the battery module and the first connection end;

[0007] The first detection module is connected to the battery module and is used for detecting the actual measured data of the battery cells of the battery module;

[0008] The first controller is connected to the first detection module and the first switch circuit and is used for controlling the first switch circuit to work according to the actual measured data of the battery cells.

[0009] Preferably, the first detection module includes an AFE chip and a first detection unit;

[0010] The first detection unit is connected to the battery module and is used for collecting the actual measured data of the battery cells;

[0011] The AFE chip is connected to the first detection unit and the first controller and is used for sending the actual measured data of the battery cells to the first controller.

[0012] Preferably, the battery module includes a plurality of battery cells;

[0013] The first detection unit includes a first voltage sampling unit;

[0014] The first voltage sampling unit is connected to both ends of each battery cell and is configured to collect the measured voltage corresponding to each battery cell.

[0015] Preferably, the battery module includes a plurality of battery cells;

[0016] The first detection unit includes a first current sampling unit;

[0017] The first current sampling unit is disposed between the negative electrode of each battery cell and the first negative connection terminal and is configured to collect the measured current corresponding to each battery cell.

[0018] Preferably, the battery module includes a plurality of battery cells;

[0019] The first detection unit includes a temperature sampling unit;

[0020] The temperature sampling unit is connected to the battery module and is configured to collect the measured temperature corresponding to the battery module.

[0021] Preferably, the battery module includes a plurality of battery cells;

[0022] The battery manager further includes a balancing circuit, and the balancing circuit includes a plurality of balancing branches, and each balancing branch is connected to both ends of a battery cell;

[0023] The AFE chip or the first controller is connected to the balancing branch and is configured to control at least one of the balancing branches to perform a balancing operation according to the measured data of the battery cells corresponding to a plurality of battery cells.

[0024] Preferably, each balancing branch includes a balancing switch and a discharging circuit connected in series;

[0025] The AFE chip or the first controller is connected to the balancing switch and is configured to control the balancing switch corresponding to the unbalanced battery cell to turn on according to the measured data of the battery cells corresponding to a plurality of battery cells, so that the discharging circuit corresponding to the unbalanced battery cell works.

[0026] Preferably, the discharging circuit includes a discharging resistor or two discharging resistors connected in parallel.

[0027] Preferably, the battery manager further includes a fuse protection circuit;

[0028] The fuse protection circuit is disposed between the battery module and the first connection terminal and is configured to perform fuse protection.

[0029] Preferably, the battery module includes at least one battery cell combination, and each battery cell combination includes a plurality of battery cells;

[0030] The fusing protection circuit includes a protection chip and at least one fusing protection unit, and each fusing protection unit is arranged in parallel with a battery cell combination;

[0031] The protection chip is connected to at least one battery cell combination and at least one of the fusing protection units, and is used for collecting the measured voltage corresponding to the battery cell combination and controlling the fusing of the fusing protection unit corresponding to at least one battery cell combination.

[0032] Preferably, the fusing protection circuit is further connected to the first controller, and is used for controlling the fusing of the fusing protection unit corresponding to at least one battery cell combination according to the protection control signal of the first controller.

[0033] Preferably, the battery manager further includes that one end of the first DC-DC circuit is connected to the battery module, and the other end of the first DC-DC circuit is used for connecting to the main control module.

[0034] Preferably, the battery manager further includes a voltage detection module, one end of the voltage detection module is connected to the battery module, and the other end of the voltage detection module is connected to the first DC-DC circuit.

[0035] An embodiment of the present invention further provides a power supply module, including the battery module and the battery manager according to any one of the above, and the battery manager is connected to the battery module.

[0036] An embodiment of the present invention further provides a power supply system, including the above power supply module and a main control module; the main control module is connected to the power supply module and is used for connecting to a load.

[0037] Preferably, the main control module includes a second controller, a second DC-DC circuit and a load interface;

[0038] The second DC-DC circuit is arranged between the load interface and the second connection end, and the second connection end is connected to the first connection end;

[0039] The second controller is connected to the second DC-DC circuit and is used for controlling the operation of the second DC-DC circuit.

[0040] Preferably, the main control module includes a plurality of second DC-DC circuits, and each second DC-DC circuit is connected to at least one of the load interfaces;

[0041] The main control module further includes a second detection module, which is used for detecting the interface information corresponding to a plurality of load interfaces;

[0042] The second controller is connected to the second detection module and the plurality of second DC-DC circuits, and is configured to control the operation of the plurality of second DC-DC circuits according to the interface information corresponding to the plurality of load interfaces.

[0043] Preferably, the second detection module includes at least one of a second voltage sampling unit, a second current sampling unit, and an overtemperature protection unit.

[0044] Preferably, the load interface includes at least one USB-C interface, at least one USB-A interface, a vehicle charger cigarette lighter socket, and at least one DC round head interface.

[0045] Preferably, the main control module further includes a fourth communication unit, one end of the fourth communication unit is connected to the second controller, and the other end of the fourth communication unit is connected to one of the USB-C interfaces.

[0046] Preferably, the main control module further includes at least one of a display screen, a lighting lamp, and an IOT module connected to the second controller.

[0047] Preferably, the main control module further includes a reset chip and a reset switch connected to the reset chip.

[0048] Preferably, the power supply system further includes an inverter module;

[0049] The inverter module is connected to the battery manager and the main control module.

[0050] Preferably, the inverter module includes a third controller, a third DC-DC circuit, and an AC-DC-AC circuit;

[0051] The third DC-DC circuit is connected to a DC input terminal, the AC-DC-AC circuit, and a third connection terminal, and the third connection terminal is connected to the first connection terminal and / or the second connection terminal;

[0052] The AC-DC-AC circuit is connected to an AC input terminal, an AC output terminal, and a third connection terminal;

[0053] The third controller is connected to the third DC-DC circuit and the AC-DC-AC circuit, and is configured to control the operation of the third DC-DC circuit and the AC-DC-AC circuit.

[0054] Preferably, the inverter module further includes a bypass protection circuit;

[0055] The bypass protection circuit is disposed between the AC input terminal and the AC output terminal;

[0056] The third controller is connected to the bypass protection circuit and is configured to control the operation of the bypass protection circuit.

[0057] Preferably, the bypass protection circuit includes an overcurrent protector and a relay;

[0058] The relay is disposed between the AC input terminal and the AC output terminal;

[0059] The overcurrent protector is connected to the AC input terminal and is configured to obtain the input current;

[0060] The third controller is connected to the overcurrent protector and the relay, and is configured to control the relay to conduct or disconnect according to the input current.

[0061] Preferably, the battery manager further includes a first communication unit connected to the first controller;

[0062] The main control module further includes a second communication unit connected to the second controller;

[0063] The inverter module further includes a third communication unit connected to the third controller;

[0064] The first communication unit, the second communication unit, and the third communication unit communicate with each other.

[0065] An embodiment of the present invention further provides an automobile, including the power supply system described in any one of the above.

[0066] In the above battery manager, power supply module, power supply system, and automobile, the battery manager detects the actual measured data of each battery cell in the battery module by using the first detection module in the power supply module, closely monitors the operating state of the battery module, and uses the first controller in the battery manager to independently control the conduction or disconnection of the battery module and the first connection end. It can also control the conduction or disconnection of the battery module and the first connection end according to the control signal of the external controller, so as to control the conduction or disconnection of the power supply circuit between the battery module and the external power supply or external load, control the reliable charging and discharging of the entire battery system during use, avoid exceeding the safe operating area, optimize the product endurance, and maximize the battery service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0068] Figure 1 It is a schematic block diagram of a battery manager in an embodiment of the present utility model;

[0069] Figure 2 It is a schematic block diagram of a power supply system in an embodiment of the present utility model;

[0070] Figure 3 It is a schematic circuit diagram of a battery manager in an embodiment of the present utility model;

[0071] Figure 4 It is another schematic circuit diagram of a battery manager in an embodiment of the present utility model.

[0072] In the figure: 1. Battery manager; 11. First switch circuit; 12. First detection module; 121. AFE chip; 122. First detection unit; 1221. First voltage sampling unit; 1222. First current sampling unit; 1223. Temperature sampling unit; 13. First controller; 14. Equalization circuit; 141. Equalization branch; 15. Fuse protection circuit; 151. Protection chip; 152. Fuse protection unit; 16. First DC-DC circuit; 17. First communication unit; 18. Voltage detection module; 2. Battery module; 3. Main control module; 31. Second controller; 32. Second DC-DC circuit; 33. Load interface; 34. Second detection module; 35. Display screen; 36. Lighting lamp; 37. IOT module; 38. Second communication unit; 39. Fourth communication unit; 310. Reset chip; 311. Reset switch; 4. Inverter module; 41. Third controller; 42. Third DC-DC circuit; 43. AC-DC-AC circuit; 44. Bypass protection circuit; 441. Overcurrent protector; 442. Relay; 45. Third communication unit. Detailed implementation manners

[0073] Next, the technical 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 some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0074] It should be understood that the present utility model can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present utility model to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout the same drawings.

[0075] It should be understood that when an element or layer is referred to as "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Thus, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be denoted as the second element, component, region, layer or part.

[0076] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. are used herein for convenience in describing the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, then an element or feature described as "under" or "beneath" or "below" other elements or features will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0077] The purpose of the terms used herein is only to describe specific embodiments and not to limit the present invention. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0078] To fully understand the present invention, detailed structures and steps will be set forth in the following description in order to explain the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may have other embodiments.

[0079] An embodiment of the present utility model provides a battery manager 1, which includes a first switch circuit 11, a first detection module 12, and a first controller 13; the first switch circuit 11 is disposed between the battery module 2 and the first connection terminals P1+ / P1-; the first detection module 12 is connected to the battery module 2 and is used to detect the actual measured data of the battery cells of the battery module 2; the first controller 13 is connected to the first detection module 12 and the first switch circuit 11 and is used to control the operation of the first switch circuit 11 according to the actual measured data of the battery cells.

[0080] Among them, the first connection terminals P1+ / P1- are the electrical connection terminals of the battery manager 1 and are used to be connected to an external power source or an external load, and include a first positive connection terminal P1+ and a first negative connection terminal P1-.

[0081] As an example, the battery manager 1 includes a first switch circuit 11, a first detection module 12, and a first controller 13. The first switch circuit 11 is disposed between the battery module 2 and the first connection terminals P1+ / P1- and is used to control the conduction or disconnection between the battery module 2 and the first connection terminals P1+ / P1- so as to control the conduction or disconnection between the battery module 2 and an external power source or an external load. The first detection module 12 is connected to the battery module 2 and is used to detect the actual measured data of the battery cells of the battery module 2. For example, the first detection module 12 can detect the actual measured temperature at the hot spots of multiple battery cells of the battery module 2, or the first detection module 12 can detect the actual measured current and actual measured voltage corresponding to each battery cell in the battery module 2, etc. The first controller 13 is connected to the first detection module 12 and the first switch circuit 11 and is used to control the operation of the first switch circuit 11 according to the actual measured data of the battery cells. For example, according to the actual measured data of the battery cells, it controls the conduction or disconnection of the first switch circuit 11.

[0082] In this embodiment, the first detection module 12 is used to detect the actual measured data of each battery cell in the battery module 2. The first controller 13 can closely monitor the operating state of the battery module 2 according to the actual measured data of the battery cells, such as the actual measured current and actual measured voltage of the battery cells, and independently control the conduction or disconnection of the battery module 2 and the first connection terminals P1+ / P1-. It can also control the conduction or disconnection of the battery module 2 and the first connection terminals P1+ / P1- according to the control signal of an external controller connected thereto, so as to control the conduction or disconnection of the power supply circuit between the battery module 2 and an external power source or an external load, control the reliable charging and discharging of the entire battery system during use, avoid exceeding the safe operating area, optimize the product's endurance, maximize the battery service life, and can also avoid potential safety hazards caused by the inability to timely control charging and discharging when there is a communication failure or other problems between the external controller and the battery manager 1, which helps to ensure the control effect of the battery module 2.

[0083] In one embodiment, the first detection module 12 includes an AFE chip 121 and a first detection unit 122; the first detection unit 122 is connected to the battery module 2 and is used for collecting the measured data of the battery cells; the AFE chip 121 is connected to the first detection unit 122 and the first controller 13 and is used for sending the measured data of the battery cells to the first controller 13.

[0084] Wherein, the AFE chip 121 refers to an analog front-end chip integrated with an analog-to-digital converter, an amplifier, a reference source, an excitation circuit, a modulation and demodulation circuit, etc.

[0085] As an example, the first detection module 12 includes an AFE chip 121 and a first detection unit 122. The first detection unit 122 is connected to the battery module 2 and is used for collecting the measured data of the battery cells. For example, the first detection unit 122 can detect the measured temperature at the hot spots of multiple battery cells, or can detect the measured current and measured voltage corresponding to each battery cell in the battery module 2, etc. The AFE chip 121 is connected to the first detection unit 122 and the first controller 13 and is used for performing analog-to-digital conversion and processing on the measured data of the battery cells and sending them to the first controller 13, so that the first controller 13 can control the first switch circuit 11 to conduct or disconnect according to the measured data of the battery cells, so as to control the conduction or disconnection of the power supply loop between the battery module 2 and the external power supply or external load.

[0086] In one embodiment, the battery module 2 includes multiple battery cells; the first detection unit 122 includes a first voltage sampling unit 1221; the first voltage sampling unit 1221 is connected to both ends of each battery cell and is used for collecting the measured voltage corresponding to each battery cell.

[0087] As an example, the first detection unit 122 includes a first voltage sampling unit 1221. The first voltage sampling unit 1221 is connected to both ends of each battery cell in the battery module 2 and is used for collecting the measured voltage corresponding to each battery cell. The first voltage sampling unit 1221 collects the measured voltage of each battery cell in the battery module 2 and sends the collected measured voltage to the AFE chip 121, so that the AFE chip 121 performs analog-to-digital conversion and processing on the measured voltages of multiple battery cells and sends them to the first controller 13, so that the first controller 13 can master the voltage conditions of each battery cell in detail, so as to perform refined control on the battery module 2 according to the voltage conditions and make the monitoring of the battery cells more perfect and safe.

[0088] As an example, the first voltage sampling unit 1221 can be any circuit that can detect the voltage of the battery cell. For example, it can be an ADC sampling circuit. The ADC sampling circuit has a high sampling accuracy, can directly collect the measured voltage corresponding to each battery cell, and is easy to process.

[0089] In one embodiment, the battery module 2 includes a plurality of battery cells; the first detection unit 122 includes a first current sampling unit 1222; the first current sampling unit 1222 is disposed between the negative electrode of each battery cell and the first negative connection terminal P1−, and is configured to collect the measured current corresponding to each battery cell.

[0090] As an example, the first detection unit 122 further includes a first current sampling unit 1222. The first current sampling unit 1222 can be disposed between the negative electrode of each battery cell and the first negative connection terminal P1−, and is configured to collect the measured current corresponding to each battery cell. In this example, the first current sampling unit 1222 may include a plurality of sampling resistors, each sampling resistor is respectively disposed between the negative electrode of each battery cell and the first negative connection terminal P1−, converts the current signal in the loop into a voltage signal, and sends it to the AFE chip 121. The AFE chip 121 processes and converts the voltage signal to determine the measured current corresponding to each battery cell. The first current sampling unit 1222 collects the measured current of each battery cell in the battery module 2, and sends the collected measured current to the AFE chip 121. The AFE chip 121 sends it to the first controller 13, so that both the AFE chip 121 and the first controller 13 can grasp the current situation of each battery cell, so as to perform corresponding control according to the current situation of the plurality of battery cells. For example, when an overcurrent anomaly occurs, the abnormal battery cell in the battery module 2 can be accurately located, so as to perform refined control on the battery module 2 and make the monitoring of the battery cells more perfect and safe.

[0091] In one embodiment, the battery module 2 includes a plurality of battery cells; the first detection unit 122 includes a temperature sampling unit 1223; the temperature sampling unit 1223 is connected to the battery module 2 and is configured to collect the measured temperature corresponding to the battery module 2.

[0092] As an example, the first detection unit 122 further includes a temperature sampling unit 1223. The temperature sampling unit 1223 is disposed in the battery module 2. For example, the temperature sampling unit 1223 can be disposed at the hot spot in the battery module 2 and is connected to the battery module 2 to collect the measured temperature corresponding to the battery module 2. By measuring the temperature of the battery module 2, the temperature situation inside the battery module 2 can be monitored, so as to perform refined control on the battery module 2 according to the measured temperature inside the battery module 2.

[0093] As an example, the temperature sampling unit 1223 can be a first thermistor, which is arranged in the battery module 2. For example, the temperature sampling unit 1223 can be arranged at the hot spot in the battery module 2 and connected to the battery module 2. The first thermistor can be connected to the AFE chip 121. When the temperature of the battery module 2 changes, the voltage across the first thermistor also changes accordingly. For example, when the temperature rises, the resistance value of the first thermistor decreases, and the voltage across the first thermistor also decreases. The AFE chip 121 can detect the voltage across the first thermistor and, through processing and conversion, obtain the measured voltage inside the battery module 2.

[0094] In one embodiment, the battery module 2 includes a plurality of battery cells; the battery manager 1 further includes a balancing circuit 14. The balancing circuit 14 includes a plurality of balancing branches 141, and each balancing branch 141 is connected to both ends of a battery cell; the AFE chip 121 or the first controller 13 is connected to the balancing branch 141 and is configured to control at least one balancing branch 141 to perform a balancing operation according to the measured data of the battery cells corresponding to the plurality of battery cells.

[0095] As an example, the battery manager 1 further includes a balancing circuit 14. The balancing circuit 14 includes a plurality of balancing branches 141 connected to the battery cells, and each balancing branch 141 is connected to the positive and negative electrodes of a battery cell for performing balancing adjustment on the battery cell. In this example, the AFE chip 121 or the first controller 13 is connected to the balancing branch 141, and can determine at least one unbalanced battery cell according to the measured data of the battery cells corresponding to the plurality of battery cells collected, and then control the balancing branches 141 at both ends of at least one unbalanced battery cell to perform a balancing operation, including but not limited to a discharging operation, to adjust the unbalanced battery cell.

[0096] In one embodiment, each equalization branch 141 includes an equalization switch Q1 and a discharging circuit connected in series; the AFE chip 121 or the first controller 13 is connected to the equalization switch Q1 and is configured to control the conduction of the equalization switch Q1 corresponding to the unbalanced battery cell according to the measured data of the battery cells corresponding to multiple battery cells, so that the discharging circuit corresponding to the unbalanced battery cell operates. Each equalization branch 141 includes an equalization switch Q1 and a discharging circuit connected in series at the positive and negative electrodes of the battery cell, and the AFE chip 121 or the first controller 13 is connected to the equalization switch Q1 and is configured to control the operation of the equalization switch Q1 according to the measured data of the battery cell. Wherein, the discharging circuit is a circuit for reducing the voltage of the battery cell connected thereto. Wherein, the equalization switch Q1 can be a control tube, such as a PMOS tube. The source electrode of the PMOS tube is connected to the positive electrode of the battery cell, the drain electrode of the PMOS tube is connected to the first end of the discharging circuit, the second end of the discharging circuit is connected to the negative electrode of the battery cell, and the gate electrode of the PMOS tube is connected to the AFE chip 121 or the first controller 13 and is configured to conduct under the control of the AFE chip 121 or the first controller 13, so that the positive and negative electrodes of the battery cell form a complete loop with the discharging circuit, or to turn off under the control of the AFE chip 121 or the first controller 13.

[0097] The first detection module 12 can detect the measured voltage of each battery cell. When the measured voltage between any two battery cells is greater than a preset unbalance value, the AFE chip 121 or the first controller 13 can control the conduction of the equalization switch Q1 in the equalization circuit 14 connected to the battery cell with a higher voltage among the two battery cells. For example, when the equalization switch Q1 is a PMOS tube, the AFE chip 121 or the first controller 13 can control the PMOS tube to conduct, so that the positive and negative electrodes of the battery cell form a complete loop with the discharging circuit in the equalization circuit 14, and the battery cell discharges to the discharging circuit to reduce the voltage of the battery cell, thereby making the voltages of multiple battery cells balanced. Wherein, the unbalance value refers to the difference between the measured voltages of any two battery cells, and the preset unbalance value is preset and is used to determine whether there is an unbalanced phenomenon with too large a difference between the measured voltages of any two battery cells. In this example, by detecting the measured voltage of the battery cell and discharging the voltage of the battery cell with a higher voltage through the equalization circuit 14, it is possible to prevent a situation where there is a large difference in the measured voltages between the battery cells, and make the voltages of multiple battery cells in the battery module 2 balanced.

[0098] In one embodiment, the discharging circuit includes a discharging resistor Rx or two discharging resistors Rx connected in parallel.

[0099] As an example, the discharging circuit can include a single discharging resistor Rx connected in series with the equalization switch Q1, or, as Figure 3As shown, the discharge circuit may also include two discharge resistors Rx connected in parallel. For example, when the equalization switch Q1 is a PMOS transistor, the source of the PMOS transistor is connected to the positive electrode of the battery cell, the gate of the PMOS transistor is connected to the AFE chip 121 or the first controller 13, the drain of the PMOS transistor is connected to the first end of the discharge resistor Rx, and the second end of the discharge resistor Rx is connected to the negative electrode of the battery cell. Alternatively, the drain of the PMOS transistor is connected to the first ends of the two discharge resistors Rx, and the second ends of the two discharge resistors Rx are connected to the negative electrode of the battery cell. When the equalization switch Q1 in the equalization circuit 14 connected to the battery cell is turned on, a complete loop is formed between the positive and negative electrodes of the battery cell and the resistor in the discharge circuit, and the battery cell discharges to the resistor. The resistor converts the electrical energy of the battery cell into heat energy and consumes it to reduce the voltage of the battery cell, thereby equalizing the voltages among multiple battery cells. When a single resistor is used as the discharge circuit, the cost is relatively low. When two resistors are connected in parallel, it is easy to adjust the resistance value of the discharge circuit.

[0100] As an example, the equalization branch 141 may further include a first diode D1, a first current-limiting resistor R1, and a second current-limiting resistor R2. The first current-limiting resistor R1 and the second current-limiting resistor R2 are disposed between the equalization circuit 14 and the AFE chip 121, or the first current-limiting resistor R1 and the second current-limiting resistor R2 are disposed between the equalization circuit 14 and the first controller 13. The anode of the first diode D1 is connected to the equalization switch Q1, and the cathode of the first diode D1 is connected to the positive electrode of the battery cell. When the equalization switch Q1 is a PMOS transistor, the first end of the first current-limiting resistor R1 is connected to the AFE chip 121 or the first controller 13, the second end of the first current-limiting resistor R1 is connected to the gate of the PMOS transistor, the first end of the second current-limiting resistor R2 is connected to the AFE chip 121 or the first controller 13, and the second end of the second current-limiting resistor R2 is connected to the source of the PMOS transistor, which plays a current-limiting role. The anode of the first diode D1 is connected to the gate of the PMOS transistor, and the anode of the first diode D1 is connected to the positive electrode of the battery cell, which plays a protective role.

[0101] In one embodiment, the battery manager 1 further includes a fuse protection circuit 15; the fuse protection circuit 15 is disposed between the battery module 2 and the first connection terminals P1+ / P1- for performing fuse protection.

[0102] As an example, the battery manager 1 further includes a fuse protection circuit 15. The fuse protection circuit 15 is disposed between the battery module 2 and the first connection terminals P1+ / P1-. When the fuse protection circuit 15 is triggered, for example, when the fuse in the fuse protection circuit 15 melts, the battery module 2 is disconnected from the first connection terminals P1+ / P1- to achieve fuse protection.

[0103] In one embodiment, the battery module 2 includes at least one battery cell combination, and each battery cell combination includes a plurality of battery cells; the fuse protection circuit 15 includes a protection chip 151 and at least one fuse protection unit 152, and each fuse protection unit 152 is arranged in parallel with a battery cell combination; the protection chip 151 is connected to at least one battery cell combination and at least one fuse protection unit 152, and is used for collecting the measured voltage corresponding to the battery cell combination and controlling the fusing of the fuse protection unit 152 corresponding to at least one battery cell combination.

[0104] As an example, the fuse protection circuit 15 includes a protection chip 151 and at least one fuse protection unit 152. One protection chip 151 is used to be connected to n battery cells, and the signal output terminal CO of each protection chip 151 is connected to n fuse protection units 152 through a third switch Q2. Each fuse protection unit 152 is connected to a battery cell, and each fuse protection unit 152 may include a three-terminal fuse, and the three-terminal fuse includes a fuse body and a heater connected to the fuse body. The heater may be composed of two resistors connected in parallel. The heater is connected to the third switch Q2, and the third switch Q2 can be turned on under the control of the protection chip 151. When the third switch Q2 is turned on, the fuse body, the heater, the third switch Q2 and the battery cell can form a loop, and the heater continuously heats up and finally fuses the fuse body to achieve overvoltage protection.

[0105] In one embodiment, the fuse protection circuit 15 is further connected to the first controller 13 and is used for controlling the fusing of the fuse protection unit 152 corresponding to at least one battery cell combination according to the protection control signal of the first controller 13.

[0106] As an example, the fuse protection circuit 15 may also be connected to the first controller 13 and can control the third switch Q2 to be turned on according to the protection control signal sent by the first controller 13. At this time, the fuse body, the heater, the third switch Q2 and the battery cell can form a loop, and the heater continuously heats up and finally fuses the fuse body to achieve overvoltage protection.

[0107] In one embodiment, the battery manager 1 further includes a first DC-DC circuit 16; one end of the first DC-DC circuit 16 is connected to the battery module 2, and the other end of the first DC-DC circuit 16 is used to connect to the main control module 3.

[0108] As an example, the battery manager 1 further includes a first DC-DC circuit 16; one end of the first DC-DC circuit 16 is connected to the battery module 2, and the other end of the first DC-DC circuit 16 is used to connect to the main control module 3, for performing DC-DC conversion on the output voltage of the battery module 2 to convert the output voltage into a power supply voltage available to the main control module 3, such as a 3.3V power supply voltage; the first DC-DC circuit 16 is not affected by the first controller 13. Even after the first controller 13 fails, the first DC-DC circuit 16 can still supply power to the main control module 3, enabling it to power on and display the status.

[0109] In an embodiment, the battery manager 1 further includes a voltage detection module 18. One end of the voltage detection module 18 is connected to the battery module 2, and the other end of the voltage detection module 18 is connected to the first DC-DC circuit 16.

[0110] As an example, the battery manager 1 is equipped with an independent voltage detection module 18, which can independently sample the total voltage of the battery module 2, evaluate whether there is undervoltage based on the collected total voltage. If undervoltage occurs, it can control the first DC-DC circuit 16 to stop supplying power to the main control module 3 to achieve undervoltage protection, ensuring that the power can be cut off in time when the battery cells are over-discharged, and ensuring that the battery cells will not be damaged.

[0111] The embodiment of the present utility model further provides a power supply module, including the battery module 2 and the battery manager 1 in any one of the above embodiments, and the battery manager 1 is connected to the battery module 2.

[0112] As an example, the power supply module includes the battery module 2 and the battery manager 1 in any one of the above examples. The battery manager 1 is connected to the battery module 2, and specifically can be connected to each battery cell in the battery module 2, for detecting the measured information of each battery cell, and controlling the operation of the first switch circuit 11 according to the measured information.

[0113] In this example, by adopting the first detection module 12, the measured data of each battery cell in the battery module 2, such as the measured current and measured voltage of the battery cell, are detected to closely monitor the operating state of the battery pack, and control the conduction or disconnection of the battery module 2 and the first connection end P1+ / P1- to control the conduction or disconnection of the power supply circuit between the battery module 2 and the external power supply or external load, so that the battery manager 1 can perform dynamic evaluation according to the measured data of the battery cells collected in real time, control the conduction or disconnection of the power supply circuit between the battery module 2 and the external power supply or external load, control the reliable charging and discharging of the entire battery system during use, avoid exceeding the safe operating area, optimize the product's battery life, and maximize the extension of the battery service life.

[0114] An embodiment of the present utility model further provides a power supply system, which includes the power supply module and the main control module 3 in the above embodiment; the main control module 3 is connected to the power supply module and is used to connect to a load.

[0115] As an example, the power supply system includes the power supply module and the main control module 3 in the above example. One end of the main control module 3 is connected to the power supply module, and the other end of the main control module 3 is used to be connected to an external load, and it can supply power to the connected external load according to the voltage provided by the power supply module.

[0116] In this example, by adopting the first detection module 12 in the power supply module to detect the actual measured data of each battery cell in the battery module 2, such as the actual measured current and actual measured voltage of the battery cell, closely monitor the operation state of the battery pack, control the conduction or disconnection of the battery module 2 and the first connection end P1+ / P1-, so as to control the conduction or disconnection of the power supply circuit between the battery module 2 and the external power supply or external load, enabling the battery manager 1 to perform dynamic evaluation according to the actual measured data of the battery cell collected in real time, control the conduction or disconnection of the power supply circuit between the battery module 2 and the external power supply or external load, control the reliable charging and discharging of the entire battery system during use, avoid exceeding the safe operating area, optimize the product's battery life, and maximize the extension of the battery's service life. By setting the main control module 3, the electrical energy output by other modules in the power supply module or the power supply system can be converted and processed, and power is supplied to the external load through the load interface 33 to meet the discharge use requirements.

[0117] In one embodiment, the main control module 3 includes a second controller 31, a second DC-DC circuit 32, and a load interface 33; the second DC-DC circuit 32 is connected to the second connection end P2+P2- and the load interface 33, and the second connection end P2+P2- is connected to the first connection end P1+ / P1-; the second controller 31 is connected to the second DC-DC circuit 32 and is used to control the operation of the second DC-DC circuit 32. Among them, the second connection end P2+P2- is the connection end in the main control module 3 for electrically connecting to other modules.

[0118] As an example, the main control module 3 includes a second controller 31, a second DC-DC circuit 32, and a load interface 33. The second DC-DC circuit 32 is connected to the second connection terminals P2+P2- and the load interface 33. The second connection terminals P2+P2- can be connected to the first connection terminals P1+ / P1- of the battery manager 1. Under the control of the second controller 31, the second DC-DC circuit 32 performs voltage conversion on the output voltage of the battery module 2 to supply power to the electrical load corresponding to the load interface 33. Alternatively, when the inverter module 4 is connected to an external power supply, it is connected to the third connection terminals P3+P3- of the inverter module 4. Under the control of the second controller 31, the second DC-DC circuit 32 further performs voltage conversion on the direct current formed by the inverter module 4 converting the commercial power to supply power to the electrical load corresponding to the load interface 33.

[0119] In one embodiment, the main control module 3 includes a plurality of second DC-DC circuits 32, and each second DC-DC circuit 32 is connected to at least one load interface 33; the main control module 3 further includes a second detection module 34 for detecting the interface information corresponding to the plurality of load interfaces 33; the second controller 31 is connected to the second detection module 34 and the plurality of second DC-DC circuits 32, and is used to control the operation of the plurality of second DC-DC circuits 32 according to the interface information corresponding to the plurality of load interfaces 33.

[0120] As an example, the main control module 3 includes a plurality of second DC-DC circuits 32, and each second DC-DC circuit 32 is connected to at least one load interface 33. The main control module 3 further includes a second detection module 34 for detecting the interface information corresponding to the plurality of load interfaces 33, such as the access status, output voltage, output current, and discharge power at the load interface 33, etc. The second controller 31 is connected to the second detection module 34 and the buck control chips in the plurality of second DC-DC circuits 32, and is used to control the operation of the buck control chips in the plurality of second DC-DC circuits 32 according to the interface information corresponding to the plurality of load interfaces 33.

[0121] In one embodiment, the second detection module 34 includes at least one of a second voltage sampling unit, a second current sampling unit, and an over-temperature protection unit.

[0122] As an example, the second detection module 34 may include at least one of a second voltage sampling unit, a second current sampling unit, and an over-temperature protection unit. The second voltage sampling unit is connected to the positive terminal of the load interface 33 and the second controller 31, and feeds back the sampled voltage to the second controller 31. The second current sampling unit is connected to the negative terminal of the load interface 33 and the second controller 31, and is used to feed back the sampled current to the second controller 31. The over-temperature protection unit includes a second thermistor, and the second thermistor is connected to the second controller 31 and is used to feed back the sampled temperature to the second controller 31. The second controller 31 may calculate the discharge power of the interface based on the sampled voltage and the sampled current, calculate the remaining charge and discharge time, or perform over-temperature protection based on the sampled temperature. The feedback control pin in the buck control chip is connected to the output pin to obtain the current output voltage of the buck control chip and perform feedback control on the voltage output by the third DC-DC circuit.

[0123] In one embodiment, the load interface 33 includes at least one USB-C interface, at least one USB-A interface, a vehicle charger cigarette lighter socket, and at least one DC round interface.

[0124] As an example, the load interface 33 includes at least one USB-C interface, at least one USB-A interface, a vehicle charger cigarette lighter socket, and at least one DC round interface. Each USB-C interface and each USB-A interface are connected to a second DC-DC circuit 32. Controlled by a synchronous buck-boost power chip, the DC voltage or current is converted into a high-frequency square-wave voltage or current, and then rectified and smoothed into direct current. When an external device is connected, the load switch is turned on to provide a 5V voltage. After establishing the PD protocol, controlled by a fast charge protocol chip, the output voltage is converted into the power supply voltage required by the PD protocol and connected to the USB-C interface. The USB-C interface can support single-port output of 100W and dual-port output of 200W, support mainstream fast charge protocols, and can quickly charge electronic products such as mobile phones and tablets. Each USB-A interface is connected to a second DC-DC circuit 32, performs a handshake match with a buck protocol control chip, and then increases the output voltage, supporting a single-port maximum output of 22.5W and a dual-port maximum output of 45W. When single-port output is supported, multiple fast charge schemes are available. The vehicle charger cigarette lighter socket and at least one DC round interface are connected to a second DC-DC circuit 32 to save development costs.

[0125] In one embodiment, the main control module 3 further includes a fourth communication unit 39. One end of the fourth communication unit 39 is connected to the second controller 31, and the other end of the fourth communication unit 39 is connected to a USB-C interface.

[0126] As an example, the main control module 4 further includes a fourth communication unit 39 disposed between the second controller 31 and any one of the USB-C interfaces. The fourth communication unit 39 enables communication between the second controller 31 and the host computer, thereby realizing system upgrade through the host computer.

[0127] In one embodiment, the main control module 3 further includes at least one of a display screen 35, a lighting lamp 36, and an IOT module 37 connected to the second controller 31.

[0128] As an example, the main control module 3 further includes a display screen 35, a lighting lamp 36, and an IOT module 37 connected to the second controller 31. The display screen 35, the lighting lamp 36, and the IOT module 37 are uniformly coordinated and controlled by the second controller 31. The user can use the APP to establish a Bluetooth connection or a WIFI connection with the IOT module 37. The second controller 31 can feedback the power consumption and remaining capacity of the power supply to the APP through the IOT module 37. By providing the display screen 35 and the IOT module 37, the battery usage can be made more intuitive.

[0129] In one embodiment, the main control module 3 further includes a reset chip 310 and a reset switch 311 connected to the reset chip 310.

[0130] As an example, the main control module 3 further includes a reset chip 310 and a reset switch 311 connected to the reset chip 310. The reset chip 310 is a separately provided chip for controlling the reset of the entire power supply system, and the reset switch 311 is a control structure connected to the reset chip 310 for realizing reset, which can be, but is not limited to, a reset button. For example, the user can press the reset button, so that the reset chip 310 can detect the reset signal of the reset button and control the reset of the entire power supply system according to the reset signal. For example, after the user long-presses the reset button for 10 s, the system reset can be realized.

[0131] In one embodiment, the power supply system further includes an inverter module 4; the inverter module 4 is connected to the battery manager 1 and the main control module 3.

[0132] As an example, the power supply system further includes an inverter module 4. The inverter module 4 is connected to the battery manager 1 and the main control module 3 and is used to connect to an external power supply, such as a mains power supply, to convert the mains voltage into a DC voltage or an AC voltage for use by the battery module 2 or an external load.

[0133] In one embodiment, the inverter module 4 includes a third controller 41, a third DC-DC circuit 42, and an AC-DC-AC circuit 43; the third DC-DC circuit 42 is connected to the DC input terminal DC IN, the AC-DC-AC circuit 43, and the third connection terminal P3+P3-; the AC-DC-AC circuit 43 is connected to the AC input terminal AC IN, the AC output terminal AC OUT, and the third connection terminal P3+P3-; the third controller 41 is connected to the third DC-DC circuit 42 and the AC-DC-AC circuit 43 and is configured to control the operation of the third DC-DC circuit 42 and the AC-DC-AC circuit 43.

[0134] As an example, the third DC-DC circuit 42 is connected to the DC input terminal DC IN, the AC-DC-AC circuit 43, and the third connection terminal P3+P3-. The DC input terminal DC IN is used to connect to an external power source, such as a solar photovoltaic panel. The third connection terminal P3+P3- is used to connect to the first connection terminal P1+ / P1- and / or the second connection terminal P2+P2-. The third DC-DC circuit 42 can perform DC-DC conversion on the direct current output by the external power source and output it to the battery module 2 or an external load through the third connection terminal P3+P3-, or output the converted direct current to the AC-DC-AC circuit 43 to continue to be converted into alternating current and output it to the external load through the AC output terminal ACOUT.

[0135] As an example, the AC-DC-AC circuit 43 is connected to the AC input terminal AC IN, the AC output terminal AC OUT, and the third connection terminal P3+P3-. The AC input terminal AC IN is used to connect to an external power source, such as a mains power supply. The AC output terminal AC OUT is used to connect to an external load. The AC-DC-AC circuit 43 can perform AC-DC conversion on the alternating current and output it to the battery module 2 or an external load through the third connection terminal P3+P3-. It can also perform AC-AC conversion on the alternating current and output it to the external load through the AC output terminal AC OUT. It can also perform DC-AC conversion on the direct current output by the third DC-DC circuit 42 or the direct current output by the battery module 2 and output it to the external load through the AC output terminal AC OUT.

[0136] As an example, the third controller 41 is connected to the third DC-DC circuit 42 and the AC-DC-AC circuit 43, and is used to control the operation of the third DC-DC circuit 42 and the AC-DC-AC circuit 43. For example, when the inverter module 4 performs AC-DC conversion on alternating current and outputs it to the battery module 2 for charging through the third connection terminals P3+ and P3-, the third controller 41 can adjust the charging current of the inverter module 4 and achieve overcurrent protection. Specifically, when the input of the inverter module 4 is overcurrent, the externally connected load is disconnected, and the charging of the battery module 2 is continued; when the inverter module 4 is connected to the mains power supply, performs AC-DC conversion on alternating current, and outputs it to the battery module 2 for charging through the third connection terminals P3+ and P3-, it can also discharge to the second DC-DC circuit 32 in the main control module 3, so that the mains power supply supplies power to both the battery module 2 and the external load at the same time. When the inverter module 4 is disconnected from the mains power supply, it can quickly switch to the battery module 2 to discharge to the second DC-DC circuit 32 in the main control module 3, so that the battery module 2 supplies power to the external load. The third controller 41 can also integrate an MPPT system to track the maximum power point, enabling the solar photovoltaic panel to output more electrical energy and effectively storing the direct current generated by the solar panel in the battery module 2.

[0137] In one embodiment, the inverter module 4 further includes a bypass protection circuit 44; the bypass protection circuit 44 is arranged between the AC input terminal AC IN and the AC output terminal AC OUT; the third controller 41 is connected to the bypass protection circuit 44 and is used to control the operation of the bypass protection circuit 44.

[0138] As an example, the inverter module 4 further includes a bypass protection circuit 44. The bypass protection circuit 44 is arranged between the AC input terminal AC IN and the AC output terminal AC OUT. The third controller 41 is connected to the bypass protection circuit 44 and can control the bypass protection circuit 44 to turn off, thereby cutting off the connection between the AC input terminal AC IN and the AC output terminal AC OUT and stopping power supply to the external load connected to the AC output terminal AC OUT.

[0139] In one embodiment, the bypass protection circuit 44 includes an overcurrent protector 441 and a relay 442; the relay 442 is arranged between the AC input terminal AC IN and the AC output terminal AC OUT; the overcurrent protector 441 is connected to the AC input terminal AC IN and is used to obtain the input current; the third controller 41 is connected to the overcurrent protector 441 and the relay 442 and is used to control the relay 442 to conduct or disconnect according to the input current.

[0140] As an example, the bypass protection circuit 44 includes an overcurrent protector 441 and a relay 442. The overcurrent protector 441 is connected to the AC input terminal AC IN for obtaining the input current; the relay 442 is connected to the AC input terminal AC IN and the AC output terminal ACOUT, and the third controller 41 is connected to the overcurrent protector 441 and the relay 442 for controlling the operation of the relay 442 according to the input current. For example, when the third controller 41 detects that the input current is overcurrent, the third controller 41 controls the relay 442 to disconnect, so that the AC input terminal AC IN stops supplying power to the AC output terminal AC OUT, preventing the high-load phenomenon caused by the excessive load connected to the AC output terminal AC OUT. When the third controller 41 detects that the input current is no longer overcurrent, it controls the relay 442 to close and resumes power supply to the AC output terminal AC OUT.

[0141] In an embodiment, the battery manager 1 further includes a first communication unit 17 connected to the first controller 13; the main control module 3 further includes a second communication unit 38 connected to the second controller 31; the inverter module 4 further includes a third communication unit 45 connected to the third controller 41; the first communication unit 17, the second communication unit 38, and the third communication unit 45 communicate with each other.

[0142] As an example, the battery manager 1 further includes a first communication unit 17 connected to the first controller 13, the main control module 3 further includes a second communication unit 38 connected to the second controller 31; the inverter module 4 further includes a third communication unit 45 connected to the third controller 41. The first communication unit 17 is used to connect to the second communication unit 38 in the second controller 31 to realize communication between the first controller 13 and the second controller 31. For example, when the measured information detected by the first detection module 12 is abnormal, the first controller 13 can report the fault type obtained according to the measured information to the second controller 31 through the first communication unit 17 and the second communication unit 38, so that the second controller 31 can display the fault through the display screen 35 for troubleshooting and resuming operation according to the fault type. Or, when the first controller 13 detects that the battery module 2 is in an environment such as low temperature or high temperature, or detects that the battery module 2 has been charged and discharged a certain number of times, the first controller 13 can notify the second controller 31 to reduce the output power of the second DC-DC circuit 32 or control to disconnect the load interface 33 through the first communication unit 17 and the second communication unit 38. The second communication unit 38 is connected to the third communication unit 45 to realize communication between the second controller 31 and the third controller 41.

[0143] An embodiment of the present invention further provides an automobile, including the power supply system in any one of the above embodiments.

[0144] As an example, the vehicle includes the power supply system in any of the above examples. By adopting the first detection module 12 in the power supply module, the power supply system detects the measured data of each battery cell in the battery module 2, such as the measured current and measured voltage of the battery cell, closely monitors the operating state of the battery pack, and controls the conduction or disconnection of the battery module 2 and the first connection terminals P1+ / P1- to control the conduction or disconnection of the power supply circuit between the battery module 2 and an external power supply or an external load. This enables the battery manager 1 to perform dynamic evaluation based on the measured data of the battery cells collected in real time, control the conduction or disconnection of the power supply circuit between the battery module 2 and an external power supply or an external load, control reliable charging and discharging of the entire battery system during use, avoid exceeding the safe operating area, optimize the product's endurance, and maximize the battery service life. By setting the main control module 3, the electrical energy output by other modules in the power supply module or the power supply system can be converted and processed, and power is supplied to an external load through the load interface 33 to meet the discharge use requirements.

[0145] The power supply system in the embodiment of the present invention supports common power output interfaces such as a USB-C interface, at least one USB-A interface, a vehicle charger cigarette lighter socket, and at least one DC round head interface. It can be charged using mains power, solar energy, a vehicle charger port, and has multiple protection functions to ensure safe, reliable, and efficient operation during the charging and discharging process. It is applicable to diverse application scenarios such as outdoor camping, exploration, fishing, and emergency rescue. The power supply system includes a power supply module, a main control module 3, and an inverter module 4. The power supply module includes a battery module 2 and a battery manager 1 connected to the battery module 2. The inverter module 4 supports AC charging and discharging. It can convert the alternating current generated by the mains power or a generator into direct current to charge and store in the battery pack, and can also convert the direct current stored in the battery pack or the direct current input from solar energy or a vehicle charger port into alternating current for household appliances to use. The battery manager 1 can collect and analyze the state parameters of the energy storage battery in real time (including but not limited to battery voltage, loop current, temperature, battery internal resistance), obtain system state evaluation parameters, and achieve effective control of charging and discharging according to specific protection control strategies. The main control module 3 performs DC-DC conversion on the DC power obtained from the battery pack or the inverter module. Its MCU communicates with the inverter module and the BMS to control DC outputs of multiple power levels to meet the power consumption requirements of different electronic devices. Information interaction is carried out between each module through a communication interface to achieve effective linkage of the power supply system and ensure safe, reliable, and efficient operation during the charging and discharging process. In addition, the second controller 31 of the power supply system and the first controller 13 of the battery manager 1 are independently powered. When the battery manager 1 protects and disconnects the load, the main control can still work normally.

[0146] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A battery manager, characterized in that: It includes a first switch circuit, a first detection module and a first controller; The first switch circuit is arranged between the battery module and the first connection end; The first detection module is connected to the battery module and is used to detect the actual measured data of the battery cells of the battery module; The first controller is connected to the first detection module and the first switch circuit, and is used to control the operation of the first switch circuit according to the actual measured data of the battery cell.

2. The battery manager according to claim 1, characterized in that: The first detection module includes an AFE chip and a first detection unit; The first detection unit is connected to the battery module and is used to collect actual measurement data of the battery cell; The AFE chip is connected to the first detection unit and the first controller, and is used to send the actual measured data of the battery cell to the first controller.

3. The battery manager according to claim 2, characterized in that: The battery module includes a plurality of battery cells; The first detection unit includes a first voltage sampling unit; The first voltage sampling unit is connected to two ends of each of the battery cells and is used to collect the measured voltage corresponding to each of the battery cells.

4. The battery manager according to claim 2, characterized in that: The battery module includes a plurality of battery cells; The first detection unit includes a first current sampling unit; The first current sampling unit is arranged between the negative electrode of each of the battery cells and the first negative connection terminal, and is used to collect the measured current corresponding to each of the battery cells.

5. The battery manager according to claim 2, characterized in that: The battery module includes a plurality of battery cells; The first detection unit includes a temperature sampling unit; The temperature sampling unit is connected to the battery module and is used to collect the actual measured temperature corresponding to the battery module.

6. The battery manager according to claim 2, characterized in that: The battery module includes a plurality of battery cells; The battery manager further includes a balancing circuit, wherein the balancing circuit includes a plurality of balancing branches, each of which is connected to two ends of a battery cell; The AFE chip or the first controller is connected to the balancing branch, and is used to control at least one of the balancing branches to perform a balancing operation according to the actual measured data of the battery cells corresponding to the plurality of battery cells.

7. The battery manager according to claim 6, characterized in that: Each of the balancing branches comprises a balancing switch and a discharge circuit arranged in series; The AFE chip or the first controller is connected to the balancing switch, and is used to control the balancing switch corresponding to the unbalanced battery cell to be turned on according to the actual measured data of the battery cells corresponding to the plurality of battery cells, so as to enable the discharge circuit corresponding to the unbalanced battery cell to operate.

8. The battery manager according to claim 7, characterized in that: The discharge circuit includes a discharge resistor or two discharge resistors connected in parallel.

9. The battery manager according to claim 1, characterized in that: The battery manager also includes a fuse protection circuit; The fuse protection circuit is arranged between the battery module and the first connection end for performing fuse protection.

10. The battery manager according to claim 9, characterized in that: The battery module includes at least one battery cell combination, and each of the battery cell combinations includes a plurality of battery cells; The fuse protection circuit comprises a protection chip and at least one fuse protection unit, and each of the fuse protection units is arranged in parallel with a battery cell combination; The protection chip is connected to at least one battery cell combination and at least one fuse protection unit, and is used to collect the measured voltage corresponding to the battery cell combination and to control the fuse protection unit corresponding to at least one battery cell combination to fuse.

11. The battery manager according to claim 10, characterized in that: The fuse protection circuit is also connected to the first controller, and is used to control the fuse protection unit corresponding to at least one of the battery cell combinations to fuse according to a protection control signal of the first controller.

12. The battery manager according to claim 1, characterized in that: The battery manager also includes a first DC-DC circuit having one end connected to the battery module, and the other end of the first DC-DC circuit is used to connect to a main control module.

13. The battery manager according to claim 12, characterized in that: The battery manager further includes a voltage detection module, one end of which is connected to the battery module, and the other end of which is connected to the first DC-DC circuit.

14. A power module, characterized in that: It comprises a battery module and the battery manager according to any one of claims 1 to 13, wherein the battery manager is connected to the battery module.

15. A power supply system, characterized in that: It comprises the power supply module and the main control module as claimed in claim 14; the main control module is connected to the power supply module and is used to connect the load.

16. The power supply system according to claim 15, characterized in that: The main control module includes a second controller, a second DC-DC circuit and a load interface; The second DC-DC circuit is arranged between the load interface and the second connection end, and the second connection end is connected to the first connection end; The second controller is connected to the second DC-DC circuit and is used to control the operation of the second DC-DC circuit.

17. The power supply system according to claim 16, characterized in that: The main control module includes a plurality of second DC-DC circuits, each of which is connected to at least one of the load interfaces; The main control module also includes a second detection module, which is used to detect interface information corresponding to the plurality of load interfaces; The second controller is connected to the second detection module and the plurality of second DC-DC circuits, and is used to control the operation of the plurality of second DC-DC circuits according to the interface information corresponding to the plurality of load interfaces.

18. The power supply system according to claim 17, characterized in that: The second detection module includes at least one of a second voltage sampling unit, a second current sampling unit and an over-temperature protection unit.

19. The power supply system according to claim 16, characterized in that: The load interface includes at least one USB-C interface, at least one USB-A interface, a car charger cigarette lighter port and at least one DC round head interface.

20. The power supply system according to claim 19, characterized in that: The main control module also includes a fourth communication unit, one end of the fourth communication unit is connected to the second controller, and the other end of the fourth communication unit is connected to the USB-C interface.

21. The power supply system according to claim 16, characterized in that: The main control module also includes at least one of a display screen, an illuminating lamp and an IOT module connected to the second controller.

22. The power supply system according to claim 16, characterized in that: The main control module also includes a reset chip and a reset switch connected to the reset chip.

23. The power supply system according to any one of claims 16 to 22, characterized in that: The power supply system also includes an inverter module; The inverter module is connected to the battery manager and the main control module.

24. The power supply system according to claim 23, characterized in that: The inverter module includes a third controller, a third DC-DC circuit and an AC-DC-AC circuit; The third DC-DC circuit is connected to the DC input terminal, the AC-DC-AC circuit and a third connection terminal, and the third connection terminal is connected to the first connection terminal and / or the second connection terminal; The AC-DC-AC circuit is connected to the AC input terminal, the AC output terminal and the third connection terminal; The third controller is connected to the third DC-DC circuit and the AC-DC-AC circuit, and is used to control the operation of the third DC-DC circuit and the AC-DC-AC circuit.

25. The power supply system according to claim 24, characterized in that: The inverter module also includes a bypass protection circuit; The bypass protection circuit is arranged between the AC input terminal and the AC output terminal; The third controller is connected to the bypass protection circuit and is used to control the operation of the bypass protection circuit.

26. The power supply system according to claim 25, characterized in that: The bypass protection circuit includes an overcurrent protector and a relay; The relay is arranged between the AC input terminal and the AC output terminal; The overcurrent protector is connected to the AC input terminal to obtain input current; The third controller is connected to the overcurrent protector and the relay, and is used to control the relay to be turned on or off according to the input current.

27. The power supply system according to claim 24, characterized in that: The battery manager further includes a first communication unit connected to the first controller; The main control module also includes a second communication unit connected to the second controller; The inverter module further includes a third communication unit connected to the third controller; The first communication unit, the second communication unit, and the third communication unit communicate with each other.

28. An automobile, characterized in that: Comprising the power supply system as described in any one of claims 15-27.

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