A power management system applied to a laminated ion battery

Abstract

A power management system applied to a laminated ion battery relates to the technical field of battery power management, comprising a plurality of battery monomers for storing and releasing electric energy; a plurality of switch units, each of which is connected with one of the battery monomers and is used for controlling the charging and discharging of the battery monomer; one of the battery monomers and one of the switch units constitute a battery unit; a master control unit, the output end of the master control unit is connected with a plurality of the battery units, and the master control unit shields the corresponding fault battery monomer according to the running state of the battery monomer. The utility model embodiment can isolate the fault battery unit in time, avoids the problem that the whole battery pack is disabled due to the single battery unit fault in the traditional battery management system, and maximally improves the energy storage capacity and service life of the battery.

Description

Technical Field

[0001] This utility model relates to the field of battery power management technology, specifically to a power management system applied to stacked ion batteries. Background Technology

[0002] With the continuous advancement of technology, battery technology has been widely used in consumer electronics, automobiles, energy storage and other fields. As an important component of energy storage and supply, batteries have permeated all aspects of daily life. Among them, stacked ion batteries, as a common type of battery, are widely used in electric vehicles, smart devices and energy storage systems due to their high energy density and small size.

[0003] However, existing stacked lithium-ion battery packs consist of multiple battery packs, usually connected in series or parallel. Each battery pack includes multiple stacks, and the BMS cannot isolate the charging and discharging path of a single stack. Even if a fault is detected in a cell, the usual practice is to isolate the entire battery pack from the charging and discharging path, rather than simply isolating the faulty stack. This crude fault shielding not only wastes the energy storage capacity of the battery itself, but also leads to a decrease in the overall efficiency of the battery pack and a shortening of its lifespan. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings and deficiencies of existing technologies by providing a power management system for stacked lithium-ion batteries, comprising:

[0005] Multiple individual battery cells are used to store and release electrical energy;

[0006] Multiple switching units, each of the switching units being connected to one of the battery cells, are used to control the charging and discharging of the battery cells. One battery cell and one of the switching units constitute a battery cell unit.

[0007] The main control unit has its output terminal connected to multiple battery cell units. The main control unit is used to shield the corresponding faulty battery cell unit based on the operating status information of the individual battery cell and the battery cell unit.

[0008] Furthermore, it also includes multiple switch control units, each switch control unit having a first terminal connected to the output terminal of the main control unit, and each switch control unit having a second and a third terminal connected to a predetermined number of battery cell units. One switch control unit and the predetermined number of battery cell units constitute a battery cell group, wherein:

[0009] The main control unit shields the corresponding battery pack or battery cell unit through the third terminal of the switch control unit based on the operating status information of the battery pack and battery cell unit. The main control unit manages the charging and discharging of the corresponding battery pack or battery cell unit through the second terminal of the switch control unit.

[0010] Furthermore, the switching unit includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a fifth switching transistor, a negative output port, a negative input port, a positive output port, a positive input port, and a signal inversion module. The second terminal of the switch control unit is connected to the input terminal of the signal inversion module, the second terminal of the first switching transistor, and the second terminal of the third switching transistor. The output terminal of the signal inversion module is connected to the second terminal of the second switching transistor and the second terminal of the fourth switching transistor. The third terminal of the first switching transistor and the first terminal of the second switching transistor are connected to the positive terminal of the battery cell. The third terminal of the third switching transistor and the first terminal of the fourth switching transistor are connected to the positive terminal of the battery cell. The first end of the four switching transistors is connected to the negative terminal of the battery cell. The first end of the first switching transistor is connected to the positive input port. The third end of the second switching transistor is connected to the positive output port. The first end of the third switching transistor is connected to the negative input port. The third end of the fourth switching transistor is connected to the negative output port. The fifth switching transistor is located between the third end of the third switching transistor and the negative terminal of the battery cell. The third end of the fifth switching transistor is connected to the negative terminal of the battery cell. The first end of the fifth switching transistor is connected to the third end of the third switching transistor and the first end of the fourth switching transistor. The second end of the fifth switching transistor is connected to the third end of the switch control unit.

[0011] Furthermore, the battery cell has a stacked structure, and the battery cell is composed of a negative electrode, an electrolyte, a separator, an electrolyte, and a positive electrode arranged from top to bottom. The negative electrode has a negative tab, and the positive electrode has a positive tab. The negative tab is connected to the third terminal of the fifth switching transistor, and the positive tab is connected to the third terminal of the first switching transistor and the first terminal of the second switching transistor.

[0012] Optionally, a communication unit is also included, which is connected to the input terminal of the main control unit and is used to realize the communication connection between the main control unit and the external battery management system.

[0013] Optionally, the switch control unit includes a serial-to-parallel signal chip, which is connected to 1-8 of the battery cells.

[0014] Optionally, the switching transistor is one of a transistor, a MOSFET, or an IGBT.

[0015] Optionally, a power supply circuit is also included, which is connected to the switch control unit and is used to manage the charging and discharging of the battery cell.

[0016] In this embodiment of the invention, the main control unit effectively shields the damaged individual cells according to the fault status information, thereby preventing them from adversely affecting the overall performance of the cell pack. In this way, the main control unit can not only isolate the faulty cells in a timely manner, avoiding the problem of the entire battery pack failing due to a single cell failure in the traditional battery management system, but also maximize the energy storage capacity of the battery and significantly extend the battery's service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural block diagram of the first embodiment of the present utility model;

[0019] Figure 2 This is a structural block diagram of the second embodiment of the present utility model;

[0020] Figure 3 This is a circuit diagram illustrating the battery cell, switch unit, switch control unit, battery cell unit, and battery cell assembly according to the third embodiment of this utility model.

[0021] Figure 4 This is a circuit diagram of another part of the switching unit of this utility model;

[0022] Figure 5 This is a circuit diagram of the main control unit of this utility model;

[0023] Figure 6 This is a circuit diagram of the communication module of this utility model;

[0024] Figure 7 This is a schematic diagram of the power supply circuit of this utility model.

[0025] Figure label:

[0026] 100. Single cell; 110. Negative electrode plate; 111. Negative electrode tab; 120. Electrolyte; 130. Separator; 140. Positive electrode plate; 141. Positive electrode tab;

[0027] 200. Switching unit; Q1. First switch transistor; Q2. Second switch transistor; Q3. Third switch transistor; Q4. Fourth switch transistor; Q5. Fifth switch transistor; 210. Negative output port; 220. Negative input port; 230. Positive output port; 240. Positive input port; 250. Signal inversion module;

[0028] 300. Main control unit;

[0029] 400. Switch control unit;

[0030] 500. Communication unit;

[0031] 600, Battery Cell Unit;

[0032] 700, battery cell pack;

[0033] 800, Power supply circuit; 810, Voltage input unit; 820, Battery management unit. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] First embodiment:

[0038] Reference Figure 1 This utility model embodiment provides a power management system for stacked lithium-ion batteries, including:

[0039] Multiple individual battery cells, 100 in total, are used to store and release electrical energy;

[0040] Multiple switching units 200, each of which is connected to a single battery cell 100, are used to control the charging and discharging of the single battery cell 100. A single battery cell 100 and a switching unit 200 constitute a single battery cell 600.

[0041] The main control unit 300 has its output terminal connected to multiple battery cell units 600. The main control unit 300 is used to shield the corresponding battery cell unit 600 according to the operating status information of the individual battery cell 100 and the battery cell unit 600.

[0042] The main control unit 300 refers to any device capable of independently controlling the individual cell 100 or the cell unit 600, such as a microcontroller, CPU, or integrated circuit. The main control unit 300 is responsible for managing and regulating the cell group 700 based on the operating status information of the individual cell 100 and the cell unit 600. The specific operation of controlling the cell unit 600 has been described in detail in the third embodiment and will not be repeated here.

[0043] The operating status information includes the voltage, current, temperature, charging status, discharging status, and fault information of the individual battery cell 100. This data is collected by sensors and transmitted to the main control unit 300 for real-time monitoring and analysis.

[0044] In this embodiment of the utility model, the main control unit 300 effectively shields the damaged individual cell 100 according to the fault information, thereby preventing it from having an adverse effect on the overall performance of the cell group 700. In this way, the main control unit 300 can not only isolate the faulty cell in time, avoiding the problem of the entire battery pack failing due to a single cell failure in the traditional battery management system, but also maximize the energy storage capacity of the battery and significantly extend the battery's service life.

[0045] It should be noted that the cell 100 mentioned in this embodiment has different structures and compositions in different types of batteries. In stacked ion batteries, the cell 100 is usually composed of multiple electrode plates and separators 130 stacked together. In solid-state batteries, the cell 100 includes a solid electrolyte, electrode materials, and electrodes connected thereto. In lithium batteries, the cell 100 is usually composed of positive and negative electrode materials and electrolyte 120, combined by stacking or winding. In lead-acid batteries, the cell 100 is composed of lead plates and sulfuric acid electrolyte 120. In sodium-ion batteries, the cell 100 is composed of positive and negative electrode materials and electrolyte 120. In zinc-air batteries, the cell 100 is composed of a zinc negative electrode, an air positive electrode, and an electrolyte. Although the cell 100 in different types of batteries differs in materials, structure, and operation, their basic working principles are the same. Those skilled in the art can understand and implement this principle and structure based on the description of this embodiment.

[0046] Furthermore, in order to meet the high-speed charging and discharging requirements of the battery, the conventional technical solution is to use a high-voltage or high-current charging method. This external high-voltage or high-current charging will cause irreversible physical damage to the metal-ion battery and affect the battery life, thereby affecting the effective service time of the pure electric vehicle battery. In this embodiment, the charging of each cell 100 can be controlled individually by the main control unit 300, and each cell 100 can be charged individually using low voltage or low current. Although the low voltage or low current charging method has been applied in the prior art, the technical concept of charging the cell 100 independently by the main control unit 300 in this embodiment is novel and difficult for those skilled in the art to derive without referring to this embodiment.

[0047] Second embodiment:

[0048] Reference Figure 2 This utility model provides another power management system for stacked ion batteries. The power management system for stacked ion batteries further includes multiple switch control units 400. The first terminal of each switch control unit 400 is connected to the output terminal of the main control unit 300, and the second terminal of each switch control unit 400 is connected to a predetermined number of cell units 600. One switch control unit 400 and the predetermined number of cell units 600 constitute a cell group 700.

[0049] The main control unit 300 is used to shield the corresponding battery cell group 700 or the corresponding battery cell unit 600 through the switch control unit 400 based on the operating status information of the battery cell group 700 and the battery cell unit 600.

[0050] It should be noted that the first terminal of the switch control unit 400 is the signal input terminal, and the second terminal of the switch control unit 400 is the signal output terminal.

[0051] In one embodiment, the switch control unit 400 includes a serial-to-parallel signal chip U2A / U2B, or other chips, microcontrollers, or integrated circuits with the same function.

[0052] Furthermore, the serial-to-parallel signal chip U2A / U2B is model 74LS165 or 74HC595, and each serial-to-parallel signal chip can be connected to 1-8 battery cell units 600.

[0053] In this embodiment, the switch control unit 400 effectively reduces the I / O pressure on the main control unit 300. Each serial-to-parallel signal chip can control multiple individual battery cells 100 or battery cell units 600 through fewer I / O interfaces, avoiding the problem that the main control unit 300 needs a large number of input / output ports to directly control a large number of battery cell units 600, thus improving the scalability and stability of the system.

[0054] Third embodiment:

[0055] Reference Figures 3-6 This utility model provides another power management system for stacked lithium-ion batteries. The switching unit 200 includes a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a fifth switch Q5, a negative output port 210, a negative input port 220, a positive output port 230, a positive input port 240, and a signal inversion module 250. The second terminal of the switch control unit 400 is connected to the input terminal of the signal inversion module 250, the second terminal of the first switch Q1, and the second terminal of the third switch Q3. The output terminal of the signal inversion module 250 is connected to the second terminal of the second switch Q2 and the second terminal of the fourth switch Q4. The third terminal of the first switch Q1 and the first terminal of the second switch Q2 are connected to the positive terminal of the battery cell 100. The third terminal of the third switch Q3 and the first terminal of the fourth switch Q4 are connected to the negative terminal of the battery cell 100. The first terminal of the first switch Q1 is connected to the positive input port 240. The third terminal of the second switch Q2 is connected to the positive output port 230. The first terminal of the third switch Q3 is connected to the negative input port 220. The third terminal of the fourth switch Q4 is connected to the negative output port 210. The fifth switch Q5 is located between the third terminal of the third switch Q3 and the negative terminal of the battery cell 100. The third terminal of the fifth switch Q5 is connected to the negative terminal of the battery cell 100. The first terminal of the fifth switch Q5 is connected to the third terminal of the third switch Q3 and the first terminal of the fourth switch Q4. The second terminal of the fifth switch Q5 is connected to the third terminal of the switch control unit 400.

[0056] It should be noted that, referring to Figure 3 This example only illustrates the connection relationship between two battery cell units 600 and the remaining components within a battery cell assembly 700. In practice, those skilled in the art can adjust the number of connections between the battery cell units 600 and the remaining components according to the scale and requirements of the battery cell assembly 700. Therefore, those skilled in the art can understand and implement this principle and structure based on the description of this embodiment.

[0057] It should be noted that this embodiment only describes the structure and connection relationship of the cell assembly. In practical applications, multiple cell units 600 can constitute a cell assembly 700, multiple cell assemblies 700 can further constitute a battery pack, and multiple battery packs can constitute the battery body. The combination of the above structures can be adjusted and expanded according to actual application requirements. Those skilled in the art can make corresponding modifications and substitutions without departing from the principle of this utility model, and all such modifications and substitutions should be considered within the protection scope of this utility model.

[0058] In this embodiment, the negative output port 210, negative input port 220, positive output port 230, and positive input port 240 can be integrated using a thick-module circuit integration method. The positive and negative ports of the cell assembly 700, the signal inversion module 250, and the switching transistor are integrated into a dedicated electronic device module. The dedicated electronic device module is installed at the battery pack end and connected to the external circuit by soldering or plugging.

[0059] When a single cell fails, the main control unit 300 can control the signal inversion module 250 and the switching transistor to isolate the faulty cell from the cell assembly 700 based on the fault information, preventing it from adversely affecting the overall performance of the cell assembly 700, thereby ensuring the safety and long-term stable operation of the cell assembly 700.

[0060] Specifically, when the main control unit 300 sends a control signal based on the operating status information of the individual battery cell, the signal is transmitted to the signal inversion module 250. The signal inversion module 250 controls the charging and discharging direction of the individual battery cell 100 by reversing the direction of the signal according to the instructions of the main control unit 300. The signal inversion module 250 is connected to the input terminal of the switch control unit 400. The switch control unit 400 connects multiple battery cells 600 into a battery cell group 700 and transmits the control signal to each battery cell 600. When the signal is transmitted to the switch unit 200, the switch tube of the switch unit 200 controls the charging and discharging process of the individual battery cell according to the signal, ensuring that the positive and negative terminals of the individual battery cell 100 are switched correctly, and realizing the charging and discharging operation of the individual battery cell.

[0061] In this embodiment, the signal inversion module 250 is connected to the input terminal of the switch control unit 400. By reversing the signal, it controls the charging and discharging direction of the individual battery cell 100. The switch unit 200 consists of multiple switching transistors, which control the positive and negative terminals of the individual battery cell 100 respectively. When a battery cell 600 fails, the main control unit 300 controls the signal inversion module 250 and the switching transistors according to the operating status information of the individual battery cell 100 to isolate the faulty battery cell 600 from the battery cell group 700 to prevent it from affecting the overall performance. The switch control unit 400 then combines multiple battery cells 600 into the battery cell group 700 to help the main control unit 300 with signal transmission and control of individual battery cells, reducing the burden on the main control unit 300 and ensuring the safe and long-term stable operation of the battery cell group 700.

[0062] It should be noted that the signal inversion module 250 can be implemented using logic components, or other independent electronic components, circuits, or integrated circuits with the same function. Those skilled in the art can choose a suitable hardware solution according to the actual needs of the battery management system.

[0063] In one embodiment, the battery cell 100 used in this embodiment has a stacked structure. The battery cell 100 is composed of a negative electrode 110, an electrolyte 120, a separator 130, and a positive electrode 140 arranged from top to bottom. The negative electrode 110 is provided with a negative electrode tab 111, and the positive electrode 140 is provided with a positive electrode tab 141. The negative electrode tab 111 is connected to the third terminal and the first terminal of the switching transistor, and the positive electrode tab 141 is connected to the third terminal and the first terminal of the switching transistor. The negative electrode tab 111 and the positive electrode tab 141 play a conductive role, enabling effective current transmission with the switching transistor, thereby completing the energy management and regulation of the battery.

[0064] In one embodiment, reference is made to... Figure 5 It also includes a communication unit 500, which is connected to the input terminal of the main control unit 300 and is used to realize the communication connection between the main control unit 300 and the external battery management system.

[0065] It should be noted that the communication unit 500 is added before the main control unit 300 mainly to realize communication and data exchange between the main control unit 300 and the external battery management system. The communication unit 500 is used to transmit data from the main control unit 300, such as the battery's voltage, current, temperature and other operating status information, to the external system for remote monitoring, alarm, analysis and control. At the same time, the external system can also send commands to the main control unit 300 through the communication unit 500 for configuration or adjustment.

[0066] In one embodiment, the communication unit 500 includes a communication module, which uses a MAX485 communication chip, or other modules or chips that perform the same function.

[0067] In one embodiment, the external system is a BMS.

[0068] In one embodiment, reference is made to... Figure 6 The main control unit 300 includes a main control chip, which can be an STM32F series chip. Taking the STM32F103ZE model selected in this embodiment as an example, it has 112 input and output ports, and the number of input and output ports that can be used to drive serial-to-parallel signal chips reaches more than 90.

[0069] Specifically, the main control chip can drive 15 serial-to-parallel signal chips, thereby enabling control of up to 120 individual battery cells.

[0070] It should be noted that those skilled in the art can select an appropriate main control chip based on the actual situation. Besides the STM32F series chips, other chips with similar functions can also be selected, as detailed below. Figure 6Taking the STM32F103R8T6 as an example, those skilled in the art can select an appropriate number of serial-to-parallel signal chips based on the number and configuration of the input / output ports of the main control unit 300. During implementation, those skilled in the art can adjust the connection method between the main control chip and the serial-to-parallel signal chips according to the scale and requirements of the battery cell group 700, thereby achieving precise control and monitoring of individual battery cells. Therefore, those skilled in the art can understand and implement this principle and structure based on the description of this embodiment.

[0071] Furthermore, refer to Figure 6 The PA7 port of the main control chip U1 can detect the voltage of the battery cell 600. By measuring the charging and discharging voltage of each battery cell 600, the operating status of each battery cell 600 can be determined.

[0072] In one embodiment, the switching transistor is one of a transistor, a MOSFET, or an IGBT.

[0073] Furthermore, the switching transistor is preferably a triode, wherein the first terminal is the collector, the second terminal is the base, and the third terminal is the emitter.

[0074] Optional, see reference Figure 7 It also includes a power supply circuit 800, which is connected to the switch control unit 400 and is used to manage the charging and discharging of the battery cell 600.

[0075] Furthermore, the power supply circuit 800 includes a voltage input unit 810 and a battery management unit 820. The voltage input unit 810 is used to input a stable voltage, and the battery management unit 820 is used to prevent the battery from overcharging, over-discharging, and short-circuiting.

[0076] Specifically, the power supply circuit 800 includes a linear lithium battery charging management chip U5 (LGS4084HB6), a MOSFET driver chip U3 (GTT8205S-A-VB), an overcharge / overdischarge protection chip U4, (DW01A) NMOS transistors Q6 and Q7, diodes D1 and D2, resistors R1, R2, R3, and R4, capacitors C1, C2, and C3, and LEDs D3 and D4.

[0077] The VCC voltage is filtered and stabilized by capacitors C1 and C2 before being supplied to the entire circuit. The VCC pin of the charging management chip U5 is connected to the VCC voltage, the BAT pin is connected to the positive input port 240 and the negative output port 210 of the battery cell unit 600, the GND pin is grounded, the CHRG pin is connected to LED D3 and resistor R3 to indicate the charging status, the FULL pin is connected to LED D4 and resistor R4 to indicate the fully charged status, and the PROG pin is current-limited by R2 to set the charging current.

[0078] MOSFET driver chip U3 and overcharge / overdischarge protection chip U4 are used for battery protection: Overcharge / overdischarge protection chip U4 monitors the battery status and controls the conduction and cutoff of NMOS transistors Q6 and Q7 to prevent overcharging, overdischarging and short circuits; MOSFET driver chip U3, as the MOSFET driver chip, works with Q6 / Q7 to provide overcurrent protection.

[0079] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0080] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A power management system for stacked ion batteries, characterized in that, include: Multiple individual battery cells (100) are used to store and release electrical energy; Multiple switching units (200), each of the switching units (200) is connected to one of the battery cells (100) for controlling the charging and discharging of the battery cells (100), and one battery cell (100) and one of the switching units (200) constitute a battery cell (600). The main control unit (300) is connected to multiple battery cell units (600) at its output terminal. The main control unit (300) shields the corresponding faulty battery cell unit (600) according to the operating status of the battery cell unit (100). It also includes multiple switch control units (400), each switch control unit (400) having a first end connected to the output end of the main control unit (300), and each switch control unit (400) having a second and a third end connected to a predetermined number of battery cell units (600). One switch control unit (400) and the predetermined number of battery cell units (600) constitute a battery cell group (700), wherein: The main control unit (300) shields the corresponding battery cell group (700) or the corresponding battery cell unit (600) through the third terminal of the switch control unit (400) based on the operating status information of the battery cell group (700) and the battery cell unit (600). The main control unit (300) performs charge and discharge management on the corresponding battery cell group (700) or the corresponding battery cell unit (600) through the second terminal of the switch control unit (400). The switching unit (200) includes a first switch (Q1), a second switch (Q2), a third switch (Q3), a fourth switch (Q4), a fifth switch (Q5), a negative output port (210), a negative input port (220), a positive output port (230), a positive input port (240), and a signal inversion module (250). The second end of the switch control unit (400) is connected to the input end of the signal inversion module (250), the second end of the first switch (Q1), and the second end of the third switch (Q3). The output end of the signal inversion module (250) is connected to the second end of the second switch (Q2) and the second end of the fourth switch (Q4). The third end of the first switch (Q1) and the first end of the second switch (Q2) are connected to the positive terminal of the battery cell (100). The third end of the third switch (Q3) and the first end of the second switch (Q5) are connected to the positive terminal of the battery cell (100). The first end of the fourth switch (Q4) is connected to the negative terminal of the battery cell (100). The first end of the first switch (Q1) is connected to the positive input port (240). The third end of the second switch (Q2) is connected to the positive output port (230). The first end of the third switch (Q3) is connected to the negative input port (220). The third end of the fourth switch (Q4) is connected to the negative output port (210). The fifth switch (Q5) is located between the third end of the third switch (Q3) and the negative terminal of the battery cell (100). The third end of the fifth switch (Q5) is connected to the negative terminal of the battery cell (100). The first end of the fifth switch (Q5) is connected to the third end of the third switch (Q3) and the first end of the fourth switch (Q4). The second end of the fifth switch (Q5) is connected to the third end of the switch control unit (400). The battery cell (100) has a stacked structure. The battery cell (100) is composed of a negative electrode (110), an electrolyte (120), a separator (130), an electrolyte (120), and a positive electrode (140) arranged from top to bottom. The negative electrode (110) is provided with a negative electrode tab (111), and the positive electrode (140) is provided with a positive electrode tab (141). The negative electrode tab (111) is connected to the third end of the fifth switch (Q5), and the positive electrode tab (141) is connected to the third end of the first switch (Q1) and the first end of the second switch (Q2).

2. The power management system for stacked ion batteries according to claim 1, characterized in that, It also includes a communication unit (500), which is connected to the input terminal of the main control unit (300) and is used to realize the communication connection between the main control unit (300) and the external battery management system.

3. The power management system for stacked ion batteries according to claim 1, characterized in that, The switch control unit (400) includes a serial-to-parallel signal chip, which is connected to 1-8 of the battery cells (600).

4. The power management system for stacked ion batteries according to claim 1, characterized in that, The switching transistor is one of the following: transistor, MOSFET, or IGBT.

5. The power management system for stacked ion batteries according to any one of claims 2-4, characterized in that, It also includes a power supply circuit (800) connected to the switch control unit (400), which is used to manage the charging and discharging of the battery cell (600).

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