An independent battery management device for high-orbit satellites

Abstract

The present invention discloses an independent battery management device for a high-orbit satellite, belonging to the field of space power supply technology. The device is characterized in that: a secondary power supply module includes a main unit and a backup unit; a digital module includes a digital main module and a digital backup module; the digital main module includes a main ISD interface encoding and decoding circuit, a main relay driving circuit, a main interface circuit and a main status detection circuit; the digital backup module includes a backup ISD interface encoding and decoding circuit, a backup relay driving circuit, a backup interface circuit and a backup status detection circuit; the sampling module includes a sampling main module and a sampling backup module; the shunt module includes a main shunt module and a backup shunt module; the main shunt module includes a main shunt circuit and a shunt resistor, and the backup shunt module includes a backup shunt circuit and a shunt resistor; the bypass module includes a bypass drive power circuit and a bypass matrix instruction circuit.

Description

Technical Field

[0001] The present invention belongs to the technical field of space power supply, and in particular relates to an independent battery management device for high-orbit satellites. Background Art

[0002] Lithium-ion batteries, as crucial energy storage units for high-orbit satellites, ensure continuous and stable power supply to satellite platforms and payloads, playing an irreplaceable role. The typical operating life of lithium-ion batteries for high-orbit satellites is 12 years, requiring a maximum depth of discharge of 80% and nearly 600 discharge cycles. Therefore, to ensure the long life, deep discharge depth, and high safety requirements of high-orbit batteries, on-orbit battery management is crucial and crucial to ensuring their reliability and safety.

[0003] Satellites in high-orbit orbits are exposed to sunlight for extended periods, with the Earth's shadow lasting 90 days per year, and the longest shadow duration being 1.16 hours. During long-term on-orbit use, lithium-ion batteries primarily operate in idle mode during periods of sunlight and power the platform and payload during periods of Earth's shadow. As lithium-ion batteries undergo increasing charge and discharge cycles, their capacity gradually decreases, and the discreteness of individual cells increases, reducing their performance and shortening their lifespan. To ensure that the battery pack's normal operating time meets lifespan requirements, a battery management device must provide real-time dynamic management of the lithium-ion battery pack. Summary of the Invention

[0004] To address the above technical deficiencies, the present invention provides a stand-alone battery management device for high-orbit satellites. This device monitors the voltage of each cell in a lithium-ion battery pack in real time. When a cell voltage reaches the equilibrium control point during charging, it performs equilibrium control to keep the cell voltage deviation within the expected range. This ensures the performance consistency of each cell over the life of the satellite, ensuring that it meets the long-term operating requirements of the satellite on orbit. If the voltage of a cell is abnormal, it must be bypassed to avoid affecting the operation of other cells. Battery management devices play a key role in ensuring the safety and reliability of lithium-ion batteries.

[0005] To achieve the above technical objectives, the present invention is implemented through the following technical solutions:

[0006] An independent battery management device for a high-orbit satellite includes a secondary power module, a bypass module, a sampling module, a digital module, and a shunt module; wherein:

[0007] The Bypass module includes a Bypass drive power circuit and a Bypass matrix instruction circuit that are interconnected. The Bypass module is connected to the Bypass assembly of each single cell through a Bypass drive bus.

[0008] The secondary power supply module includes a main unit and a backup unit; the main unit includes a main DC / DC and a main power-on circuit connected to each other; the backup unit includes a backup DC / DC and a backup power-on circuit connected to each other;

[0009] The digital module includes a digital master module and a digital backup module; the digital master module includes a master interface encoding circuit, a master relay drive circuit, a master interface circuit, and a master status detection circuit; the digital backup module includes a backup interface encoding circuit, a backup relay drive circuit, a backup interface circuit, and a backup status detection circuit;

[0010] The sampling module includes a main battery voltage detection circuit and a backup battery voltage detection circuit; the main battery voltage detection circuit further includes a main single battery voltage sampling circuit, a combination battery voltage sampling circuit, and a whole battery voltage sampling circuit; the sampling backup module includes a backup battery voltage detection circuit, and the backup battery voltage detection circuit further includes a backup single battery voltage sampling circuit, a combination battery voltage sampling circuit, and a whole battery voltage sampling circuit;

[0011] The shunt module includes a main shunt circuit, a backup shunt circuit and a shunt resistor; wherein:

[0012] The main battery voltage detection circuit and the main interface encoding and decoding circuit are both connected to the main status detection circuit, and the main DC / DC is respectively connected to the main battery voltage detection circuit, the main interface encoding and decoding circuit, the main relay drive circuit, and the main status detection circuit; the main interface encoding and decoding circuit is connected to the main interface circuit; the main status detection circuit is connected to the main shunt circuit and the Bypass matrix instruction circuit; the main relay drive circuit is connected to the main shunt circuit; the backup battery voltage detection circuit and the backup interface encoding and decoding circuit are connected to the backup status detection circuit, and the backup DC / DC is respectively connected to the backup battery voltage detection circuit, the backup interface encoding and decoding circuit, the backup relay drive circuit, and the backup status detection circuit; the backup interface encoding and decoding circuit is connected to the backup interface circuit; the backup status detection circuit is connected to the backup shunt circuit and the Bypass matrix instruction circuit; the backup relay drive circuit is connected to the backup shunt circuit; the main shunt circuit and the backup shunt circuit are connected to the shunt resistor; the main relay drive circuit and the backup relay drive circuit are connected to the Bypass matrix instruction circuit.

[0013] Preferably: the main battery voltage detection circuit includes a main single battery voltage sampling circuit, a combined battery voltage sampling circuit, and a whole battery voltage sampling circuit; the backup battery voltage detection circuit includes a backup single battery voltage sampling circuit, a combined battery voltage sampling circuit, and a whole battery voltage sampling circuit;

[0014] Preferably, two battery voltage detection circuits detect the voltages of single cells, assembled batteries, and entire battery packs; two interface encoding and decoding circuits each include an encoding circuit and a decoding circuit; wherein: the encoding circuit completes data encoding of the battery voltage, the operating status of the balancing switch, and the bypass switch, and transmits the data in a bus data format to the service module integrated electronics; based on the uploaded data, the service module integrated electronics issues a balancing instruction or a bypass instruction to the interface circuit via the bus; the decoding circuit decodes the instruction and controls the shunt circuit to perform balancing or bypass switch operation; when the service module integrated electronics again sends a data enable sequence via the bus, the status signal is transmitted back to the encoding circuit to implement balancing / bypass operation and balancing / bypass status readback.

[0015] Preferably, when the lithium-ion battery pack reaches the end of its life or a single battery is abnormal, the bypass module connects the bypass device connected in parallel with the lithium-ion battery pack through the bypass drive circuit, so that the abnormal single lithium-ion battery is bypassed.

[0016] Preferably, the input of the main DC / DC and the backup DC / DC is a 100V satellite platform bus, and the output is +28V circuit, +12V, -12V and +5V.

[0017] Preferably, the Bypass driving circuit adopts a matrix instruction driving circuit, and uses a 7x7 matrix output interface to realize 49-way instruction output; each instruction has one of the 7 horizontal channels and one of the 7 vertical channels, and can only be executed when both are connected at the same time.

[0018] Preferably: the digital module frames the voltage digital quantity, balance, and bypass status quantity and uploads them to the service module integrated electronics, and at the same time receives and decodes the balance instructions and bypass drive instructions sent by the service module integrated electronics, and drives the corresponding matrix instruction lines to execute the instructions.

[0019] Preferably: the main shunt circuit and the backup shunt circuit use a 7x7 output interface in matrix form to achieve 49-way instruction output; each instruction has one of the 7 horizontal channels and one of the 7 vertical channels, and can only be executed when both are connected at the same time.

[0020] The advantages and technical effects of the present invention are:

[0021] 1. The present invention has strong versatility. The single unit is a stand-alone unit, which is flexible and convenient, and can be easily installed at any location in the entire satellite. The entire unit is composed of five standardized functional circuit modules, including secondary power supply module, sampling module, balancing module, bypass module, and telemetry and remote control module;

[0022] 2. The present invention has wide applicability. It meets the requirements for the series connection of battery cells in general high-orbit satellite battery packs. The number of series connection of control cells is 20 to 22, which covers the requirements for the battery packs of other satellite platforms (7 cells, 9 cells).

[0023] 3. The present invention has high maintainability. It adopts standardized module design, and the number of functional circuits can be flexibly configured according to user needs. It is easy to maintain and the entire module can be replaced at any time and in a timely manner.

[0024] 4. The present invention has high reliability. The entire machine adopts a cold backup working mode, and all functional module circuits (secondary power module, sampling module, balancing module, bypass module, and telemetry and remote control module) adopt a primary-backup design. The sampling module circuit is divided into three parts: single-cell voltage sampling, small-group sampling, and battery pack total voltage sampling. Multi-dimensional test results are compared and verified to ensure the effectiveness of battery pack sampling. The balancing and bypass modules adopt a matrix drive circuit design, which efficiently utilizes resources while meeting functional requirements. The balancing and bypass instructions can only be executed when the row and column instructions are connected at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a module structure diagram of a preferred embodiment of the present invention;

[0026] Figure 2 is a wiring diagram of a preferred embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the primary and backup design of the secondary power supply in the preferred embodiment of the present invention;

[0028] Figure 4 This is a basic topology diagram of the TMTC in the preferred embodiment of the present invention, describing the functional composition of the digital part in the digital module;

[0029] Figure 5 This is a schematic diagram of a shunt circuit driving circuit for a single battery module in a preferred embodiment of the present invention;

[0030] Figure 6 1 is a schematic diagram of relay matrix instructions of the Bypass drive circuit in a preferred embodiment of the present invention, which is divided into row instructions Ri-n and column instructions Ci-n. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purpose, design control system and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] See also Figures 1 to 6, an independent battery management device for high-orbit satellites, including a secondary power module, a bypass module, a sampling module, a digital module and a shunt module; wherein:

[0033] The bypass module includes a bypass drive circuit; the bypass drive circuit is connected to the bypass component of each single battery through a bypass drive bus;

[0034] The secondary power supply module includes a main unit and a backup unit; the main unit includes a main DC / DC and a main power-on circuit connected to each other; the backup unit includes a backup DC / DC and a backup power-on circuit connected to each other;

[0035] The digital module includes a digital master module and a digital backup module; the digital master module includes a master interface encoding circuit, a master relay drive circuit, a master interface circuit, and a master status detection circuit; the digital backup module includes a backup interface encoding circuit, a backup relay drive circuit, a backup interface circuit, and a backup status detection circuit;

[0036] The sampling module includes a main sampling module and a backup sampling module; the main sampling module includes a main battery voltage detection circuit, which in turn includes a main single battery voltage sampling circuit, a combination battery voltage sampling circuit, and a whole battery voltage sampling circuit; the backup sampling module includes a backup battery voltage detection circuit, which in turn includes a backup single battery voltage sampling circuit, a combination battery voltage sampling circuit, and a whole battery voltage sampling circuit;

[0037] The shunt module includes a main shunt module and a backup shunt module; the main shunt module includes a main shunt circuit and a main shunt resistor connected to each other, and the backup shunt module includes a backup shunt circuit and a backup shunt resistor connected to each other;

[0038] The shunt module includes a main shunt module and a backup shunt module; the main shunt module includes interconnected main shunt circuits, the backup shunt module includes interconnected backup shunt circuits, and the main shunt module and the backup shunt module share 20 to 22 shunt resistors;

[0039] The Bypass module includes a Bypass driving power circuit and a Bypass matrix instruction circuit.

[0040] The internal circuit connection relationship of the balancing management unit is as follows: the main battery voltage detection circuit and the status detection circuit are connected to the main interface encoding circuit, the main DC / DC converter is ±12V, +5V, and is connected to the main battery voltage detection circuit, the main interface encoding circuit, the main relay drive circuit, and the main status detection circuit; the main interface encoding circuit is connected to the main interface circuit; the main status detection circuit is connected to the main shunt circuit and the Bypass matrix instruction circuit; the main relay drive circuit is connected to the main shunt circuit; the backup battery voltage detection circuit and the status detection circuit are connected to the backup interface encoding circuit, and the backup DC / DC converter is connected to the main battery voltage detection circuit, the main interface encoding circuit, the main relay drive circuit, and the main status detection circuit. To back up ±12V and +5V, it is connected to a backup battery voltage detection circuit, a backup interface encoding and decoding circuit, a backup relay drive circuit, and a backup status detection circuit; the backup interface encoding and decoding circuit is connected to the backup interface circuit; the backup status detection circuit is connected to a backup shunt circuit and a Bypass matrix instruction circuit; the backup relay drive circuit is connected to the backup shunt circuit; the main shunt circuit and the backup shunt circuit are connected to 20 to 22 shunt resistors; the main relay drive circuit and the backup relay drive circuit are connected to the Bypass matrix instruction circuit, and the Bypass matrix instruction circuit is connected to the Bypass drive power circuit.

[0041] The external circuit connection relationship of the balancing management unit is as follows: the main DCDC and backup DCDC are connected to the platform power distribution unit; the main power-on circuit, main interface circuit, backup power-on circuit, and backup interface circuit are connected to the service module integrated electronics; the main battery voltage detection circuit, main shunt circuit, backup battery voltage detection circuit, backup shunt circuit, and bypass circuit are connected to battery pack A and battery pack B.

[0042] In this preferred embodiment:

[0043] The two battery voltage detection circuits detect the voltages of single cells, assembled batteries and battery packs; the two ISD interface encoding and decoding circuits both include an encoding circuit and a decoding circuit. The encoding circuit completes the data encoding of the battery voltage, the working status of the balancing switch and the bypass switch, and sends it to the service module integrated electronics in the SDI bus data format. Based on the uploaded data, the service module integrated electronics issues a balancing instruction or a bypass instruction through the OSD communication interface circuit; the decoding circuit decodes the instruction and controls the shunt circuit to perform balancing or bypass switch operation. When the service module integrated electronics again sends the data enable timing through the SDI bus, the status signal is transmitted back to the encoding circuit to realize balancing shunt and balancing status reading back.

[0044] When the lithium-ion battery pack reaches the end of its life or a single battery is abnormal, the bypass module connects the bypass device connected in parallel with the lithium-ion battery pack through the bypass drive circuit, so that the abnormal single lithium-ion battery is bypassed.

[0045] The input of the main DC / DC and the backup DC / DC is a 100V satellite platform bus, and the output is +28V circuit, +12V, -12V and +5V.

[0046] The Bypass driving circuit adopts a matrix instruction driving circuit, and uses a 7x7 matrix output interface to realize 49-way instruction output; each instruction has one of the 7 horizontal channels and one of the 7 vertical channels, and can only be executed when both are connected at the same time.

[0047] The digital module frames the voltage digital quantity and the balanced Bypass status quantity and uploads them to the service module integrated electronics. At the same time, it receives and decodes the balanced instructions and Bypass drive instructions sent by the service module integrated electronics, and drives the corresponding matrix instruction line to execute the instructions.

[0048] The main shunt circuit and the backup shunt circuit use a 7x7 output interface in matrix form to achieve 49-way instruction output; each instruction has one of the 7 horizontal channels and one of the 7 vertical channels, and can only be executed when both are connected at the same time.

[0049] The Bypass module includes a Bypass drive circuit and a Bypass status acquisition circuit. The Bypass drive circuit is connected to each single cell via a Bypass drive bus. The Bypass module prevents the voltage of a single cell from exceeding the normal voltage range of the battery cell, thereby affecting the functions of other cells. When this occurs, the single cell performs a Bypass action and is placed outside the battery pack, eliminating its participation in the satellite's power supply. This preferred embodiment utilizes a matrix instruction drive circuit, using a 7x7 matrix output interface to achieve 49-way instruction output, effectively conserving instruction channel resources. Each instruction consists of two instructions: a row instruction Ri-n and a column instruction Ci-n. These instructions can only be executed when both instructions are connected simultaneously, ensuring the reliability of instruction execution.

[0050] The secondary power supply module includes a main unit and a backup unit; the main unit includes a main DC / DC and a main relay connected to each other; the backup unit includes a backup DC / DC and a backup relay connected to each other; in this preferred embodiment, the input of the secondary power supply module is a 100V satellite platform bus, and the main unit and the backup unit each include two circuits, one part is a 100V to 28V circuit, and the other part is a 100V to +12V, -12V, +5V circuit.

[0051] The digital module includes a digital master module and a digital backup module; the digital master module includes a master interface encoding circuit, a master relay drive circuit, a master interface circuit, and a master status detection circuit; the digital backup module includes a backup ISD interface encoding circuit, a backup relay drive circuit, a backup interface circuit, and a backup status detection circuit; the functions of the digital master module and the sampling backup module are exactly the same. Each of them realizes bus communication, telemetry data encoding, telemetry analog-to-digital conversion, remote control command decoding, and matrix command drive, as shown in the attached figure. Figure 3 The digital module mainly converts the battery voltage into analog-to-digital data, frames the voltage digital quantity and the balance bypass status quantity and uploads it to the integrated electronics. It also receives and decodes the balance instructions and bypass drive instructions sent by the integrated electronics, and drives the corresponding matrix instruction lines to execute the instructions.

[0052] The shunt module includes a main shunt module and a backup shunt module; the main shunt module includes a main shunt circuit and a main shunt resistor that are interconnected, and the backup shunt module includes a backup shunt circuit and a backup shunt resistor that are interconnected, a balance state acquisition circuit, and a balance drive circuit; the digital module receives the balance instruction sent by the service module integrated electronics to realize the shunt execution function. The hardware includes a shunt drive circuit and a shunt power resistor. The shunt drive circuit uses a 7 by 7 matrix output interface to realize 49-way instruction output, which effectively saves instruction channel resources; and each instruction has two horizontal and vertical channels (a row and a column) that are connected at the same time to be executed, ensuring the reliability of instruction execution. The drive switch is implemented using a low-power relay;

[0053] In the above preferred embodiment, the interface circuit, the encoding and decoding circuit, the analog-to-digital conversion circuit, the telemetry data encoding circuit, the master control circuit, the remote control instruction decoding circuit, and the matrix instruction driving circuit constitute a digital module (remote control and telemetry module), such as Figure 4 As shown;

[0054] The master battery voltage detection circuit and status detection circuit are connected to the master interface coding circuit, and the master DC / DC is converted to master ±12V, +5V, and is connected to the master battery voltage detection circuit, the master interface coding circuit, the master relay drive circuit, and the master status detection circuit; the master interface coding circuit is connected to the master interface circuit; the master status detection circuit is connected to the master shunt circuit and the Bypass matrix instruction circuit; the master relay drive circuit is connected to the master shunt circuit; the backup battery voltage detection circuit and status detection circuit are connected to the backup interface coding circuit, and the backup DC / DC is converted to backup ±12V, +5V. +5V, connected to the backup battery voltage detection circuit, backup interface encoding and decoding circuit, backup relay drive circuit, and backup status detection circuit; the backup interface encoding and decoding circuit is connected to the backup interface circuit; the backup status detection circuit is connected to the backup shunt circuit and the Bypass matrix instruction circuit; the backup relay drive circuit is connected to the backup shunt circuit; the main shunt circuit and the backup shunt circuit are connected to 20 to 22 shunt resistors; the main relay drive circuit and the backup relay drive circuit are connected to the Bypass matrix instruction circuit, and the Bypass matrix instruction circuit is connected to the Bypass drive power circuit.

[0055] The working principle of the present invention is:

[0056] The battery management device receives the data enable timing sent by the service module integrated electronics through the bus, and the voltage detection circuit (main battery voltage detection circuit and backup battery voltage detection circuit) completes the detection of single cell, combination and whole group battery voltage; the status detection circuit (main status detection circuit and backup status detection circuit) completes the detection of single cell balancing switch status; the encoding circuit completes the data encoding of battery voltage, balancing switch and Bypass switch working status, and sends it to the service module integrated electronics in bus data format. According to the uploaded data, the service module integrated electronics sends a balancing instruction or a Bypass instruction through the communication interface circuit, and the decoding circuit decodes the instruction to control the shunt circuit to perform balancing or Bypass switch operation. When the service module integrated electronics again sends the data enable timing through the bus, the status signal is transmitted back to the encoding circuit to realize balancing shunt and balancing status reading, completing a basic working cycle.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An independent battery management device for high-orbit satellites, characterized in that: It includes a secondary power module, a bypass module, a sampling module, a digital module and a shunt module; among which: The Bypass module includes a Bypass drive power circuit and a Bypass matrix instruction circuit that are interconnected; the Bypass module is connected to the Bypass assembly of each single cell through a Bypass drive bus; The secondary power supply module includes a main unit and a backup unit; the main unit includes a main DC / DC and a main power-on circuit connected to each other; the backup unit includes a backup DC / DC and a backup power-on circuit connected to each other; The digital module includes a digital master module and a digital backup module; the digital master module includes a master interface encoding circuit, a master relay drive circuit, a master interface circuit, and a master status detection circuit; the digital backup module includes a backup interface encoding circuit, a backup relay drive circuit, a backup interface circuit, and a backup status detection circuit; The sampling module includes a main battery voltage detection circuit and a backup battery voltage detection circuit; the main battery voltage detection circuit further includes a main single battery voltage sampling circuit, a combination battery voltage sampling circuit, and a whole battery voltage sampling circuit; the backup battery voltage detection circuit further includes a backup single battery voltage sampling circuit, a combination battery voltage sampling circuit, and a whole battery voltage sampling circuit; The shunt module includes a main shunt circuit, a backup shunt circuit and a shunt resistor; wherein: The main battery voltage detection circuit and the main interface encoding and decoding circuit are both connected to the main status detection circuit, and the main DC / DC is respectively connected to the main battery voltage detection circuit, the main interface encoding and decoding circuit, the main relay drive circuit, and the main status detection circuit; the main interface encoding and decoding circuit is connected to the main interface circuit; the main status detection circuit is connected to the main shunt circuit and the Bypass matrix instruction circuit; the main relay drive circuit is connected to the main shunt circuit; the backup battery voltage detection circuit and the backup interface encoding and decoding circuit are connected to the backup status detection circuit, and the backup DC / DC is respectively connected to the backup battery voltage detection circuit, the backup interface encoding and decoding circuit, the backup relay drive circuit, and the backup status detection circuit; the backup interface encoding and decoding circuit is connected to the backup interface circuit; the backup status detection circuit is connected to the backup shunt circuit and the Bypass matrix instruction circuit; the backup relay drive circuit is connected to the backup shunt circuit; the main shunt circuit and the backup shunt circuit are connected to the shunt resistor; the main relay drive circuit and the backup relay drive circuit are connected to the Bypass matrix instruction circuit.

2. The independent battery management device for high-orbit satellites according to claim 1 is characterized in that: The two battery voltage detection circuits detect the voltages of single cells, assembled batteries, and entire battery packs; the two interface encoding and decoding circuits both include an encoding circuit and a decoding circuit; wherein: the encoding circuit completes data encoding of the battery voltage, the operating status of the balancing switch, and the bypass switch, and sends it to the service module integrated electronics in a bus data format. Based on the uploaded data, the service module integrated electronics issues a balancing instruction or a bypass instruction to the interface circuit via the bus; the decoding circuit decodes the instruction and controls the shunt circuit to perform balancing or bypass switch operation. When the service module integrated electronics again sends data enable timing via the bus, the status signal is transmitted back to the encoding circuit to implement balancing / bypass operation and balancing / bypass status readback.

3. The independent battery management device for high-orbit satellites according to claim 1 is characterized in that: When the lithium-ion battery pack reaches the end of its life or a single battery is abnormal, the bypass module connects the bypass device connected in parallel with the lithium-ion battery pack through the bypass drive circuit, so that the abnormal single lithium-ion battery is bypassed.

4. The independent battery management device for high-orbit satellites according to claim 1 is characterized in that: The input of the main DC / DC and the backup DC / DC is a 100V satellite platform bus, and the output is +28V circuit, +12V, -12V and +5V.

5. The independent battery management device for high-orbit satellites according to claim 3 is characterized in that: The Bypass driving circuit adopts a matrix instruction driving circuit, and uses a 7x7 matrix output interface to realize 49-way instruction output; each instruction has one of the 7 horizontal channels and one of the 7 vertical channels, and can only be executed when both are connected at the same time.

6. The independent battery management device for high-orbit satellites according to claim 5, characterized in that: The digital module frames the voltage digital quantity, balance, and bypass status quantity and uploads them to the service module integrated electronics. At the same time, it receives and decodes the balance instructions and bypass drive instructions sent by the service module integrated electronics, and drives the corresponding matrix instruction lines to execute the instructions.

7. The independent battery management device for high-orbit satellites according to claim 6, characterized in that: The main shunt circuit and the backup shunt circuit use a 7x7 output interface in matrix form to achieve 49-way instruction output; each instruction has one of the 7 horizontal channels and one of the 7 vertical channels, and can only be executed when both are connected at the same time.

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