Household energy storage sodium-lithium sub-battery management system

Abstract

The invention relates to the technical field of sodium-lithium sub-battery energy storage, in particular to a household energy storage sodium-lithium sub-battery management system, which comprises a battery pack, and an energy storage sodium battery, an in-board compiler control level, a low-pass MOS switch and an A / D sampling device are arranged in the battery pack. The energy storage sodium battery is electrically connected with the in-board compiler control level, the low-pass MOS switch and the A / D sampling through a battery sampling line, a heat source conversion assembly used for converting a heat source of the energy storage sodium battery is arranged on the outer wall of one side of the battery pack, and a heat dissipation assembly used for conducting heat dissipation on the interior of the battery pack is arranged at one end of the battery pack; through a circuit building mode, the level of a battery sampling line is controlled through an in-board compiler, and then the battery sampling line is directly sampled by A / D after passing through a low-pass MOS switch, so that sampling is completed, and normal use can be activated as long as a power signal is sent to a battery management system under the condition that a battery box does not need to be disassembled when the battery is discharged to 0V and charged.

Description

Technical Field

[0001] The present invention relates to the technical field of sodium-lithium battery energy storage, and in particular to a household energy storage sodium-lithium battery management system. Background Art

[0002] Sodium battery is a new type of battery technology that uses sodium ions (Na+) instead of lithium ions (Li+) to store charge. Sodium ions are lightweight, low-cost metal ions with higher chemical energy density than lithium ions. Sodium batteries can use different electrolytes such as solid electrolytes, lithium metal electrolytes or organic electrolytes. Sodium batteries have the advantages of high energy density, long service life and low cost.

[0003] Energy storage sodium batteries have great application advantages in power systems and telecommunications systems, and are widely recognized by the global energy storage market. However, due to its high technical difficulty, the mature technology of energy storage sodium batteries is still in the growth stage and needs to overcome many challenges. Among them, the battery management system also faces some problems. The current battery management system uses an integrated solution to collect voltage through the analog front-end chip AFE.

[0004] However, the current analog front-end chip AFE collects voltage, which is affected by the minimum voltage of the battery. According to the characteristics of the sodium battery, it will not affect the battery when it is discharged to 0V. The current battery management system cannot activate the BMS when the battery is discharged to 0V. At this time, the battery box needs to be disassembled and the battery needs to be charged to a certain voltage before the battery management system can be activated. This affects both customer use and production maintenance. In addition, when the energy storage sodium battery is used in a high ambient temperature, the energy storage sodium battery pack will generate a lot of heat during use. The high heat causes the stability and reliability of the energy storage sodium battery pack to be reduced. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a household energy storage sodium-lithium battery management system to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A household energy storage sodium-lithium battery management system comprises a battery pack, wherein an energy storage sodium battery, an on-board compiler control level, a low-pass MOS switch and an A / D sampling are arranged inside the battery pack, the energy storage sodium battery is electrically connected to the on-board compiler control level, the low-pass MOS switch and the A / D sampling through a battery sampling line, a heat source conversion component for converting a heat source of the energy storage sodium battery is arranged on an outer wall of one side of the battery pack, and a heat dissipation component for dissipating heat inside the battery pack is arranged at one end of the battery pack.

[0008] Specifically, the detection unit of the low-pass MOS switch includes a switching speed detection unit, a distortion detection unit, a reliability detection unit and a temperature detection unit. The switching speed detection unit is used to detect the switching speed, the distortion detection unit is used to detect distortion and noise in the audio signal, the reliability detection unit is used to detect the reliability of the electronic device or system, and the temperature detection unit is used to detect the ambient temperature of the energy storage sodium battery.

[0009] Specifically, the A / D sampling includes a sampling unit, a conversion unit and a maximum / minimum value detection unit. The sampling unit is used to convert an analog signal into a digital signal. The conversion unit is a circuit for converting an analog signal into a digital signal. The maximum value detection unit is used to detect the maximum value of the A / D sampling so as to provide protection when the analog signal exceeds the maximum value. The minimum value detection unit is used to detect the minimum value of the A / D sampling so as to provide protection when the analog signal is lower than the minimum value.

[0010] Specifically, the heat dissipation assembly includes a heat dissipation fan and a motor. A protective frame is provided outside the heat dissipation fan. The output end of the motor is connected to the heat dissipation fan, and the motor is fixed on the protective frame.

[0011] Specifically, the heat source conversion assembly includes a heat source aluminum block, a cold source aluminum block, copper wire, constantan wire, an external water cooling tube and a conductive block. The external water cooling tube is located outside the battery pack. The heat source aluminum block is connected to the heat source of the energy storage sodium battery, and the outer wall of the cold source aluminum block is connected to the external water cooling tube.

[0012] Specifically, one end of the copper wire is connected to one side of the heat source aluminum block, and the other end of the copper wire is connected to the conductive block and one end of the cold source aluminum block in sequence; one end of the constantan wire is connected to the side of the heat source aluminum block away from the copper wire, and the other end of the constantan wire is connected to the side of the cold source aluminum block away from the copper wire.

[0013] Specifically, the conductive block is electrically connected to the motor.

[0014] Specifically, the technical solution is that a first through hole is opened at one end of the battery pack shell, and the outer circumferential wall of the protective frame outside the heat dissipation fan is connected to the inner circumferential wall of the first through hole.

[0015] Specifically, the battery pack shell is provided with heat dissipation through holes on both sides, and the first through hole is connected to the heat dissipation through holes.

[0016] In summary, the present invention mainly has the following beneficial effects:

[0017] 1. In response to the problems raised in the background technology, the present application adopts a circuit construction method, and does not use an analog front end method for collection. The battery sampling line is controlled by the on-board compiler, and then directly sampled by the A / D after passing through a low-pass MOS switch. In this way, the sampling is completed. In this way, when the battery is discharged to 0V, there is no need to disassemble the battery box when charging. As long as the power signal is given to the battery management system, it can be activated for normal use;

[0018] 2. By absorbing and utilizing the heat generated by the battery pack during use, the heat energy is converted into electrical energy to power the heat dissipation components, thereby dissipating the heat inside the battery pack and effectively dissipating the heat to ensure the stability and reliability of the use of the energy storage sodium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of the overall battery pack of the present invention;

[0020] Figure 2 It is a schematic diagram of the heat dissipation assembly of the present invention;

[0021] Figure 3 This is a schematic diagram of the process flow of the heat source conversion assembly of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall circuit construction of the present invention.

[0023] In the figure: 1. battery pack; 2. heat source aluminum block; 3. cold source aluminum block; 4. copper wire; 5. constantan wire; 6. external water cooling pipe; 7. conductive block; 8. cooling fan; 9. motor; 11. first through hole; 12. heat dissipation through hole. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] The following describes an embodiment of the present invention based on its overall structure.

[0026] Example

[0027] See also Figure 1-4The present invention provides a technical solution: a household energy storage sodium-lithium battery management system, comprising a battery pack 1, wherein the battery pack 1 is provided with an energy storage sodium battery, an on-board compiler control level, a low-pass MOS switch and an A / D sampling, the energy storage sodium battery is electrically connected to the on-board compiler control level, the low-pass MOS switch and the A / D sampling through a battery sampling line, a heat source conversion component for converting the heat source of the energy storage sodium battery is provided on an outer wall of one side of the battery pack 1, a heat dissipation component for dissipating heat inside the battery pack 1 is provided at one end of the battery pack 1, a detection unit of the low-pass MOS switch comprises a switching speed detection unit, a distortion detection unit, a reliability detection unit and a temperature detection unit, the switching speed detection unit is used to detect the switching speed, the distortion detection unit is used to detect distortion and noise in the audio signal, the reliability detection unit is used to detect the reliability of the electronic device or system, and the temperature detection unit is used to detect the ambient temperature of the energy storage sodium battery, so as to Provide real-time temperature data and convert it into a signal for comparison; the switch speed detection unit consists of a switch detection circuit and a control circuit, detects the on and off state of the switch, and generates a pulse signal to control the control circuit. The control circuit controls the on and off state of the switch according to the pulse signal of the switch detection circuit, thereby realizing the switch speed detection of the switch device. The switch speed detection unit can be used to realize various functions, such as automatic control, remote control, manual control, etc.; A / D sampling includes a sampling unit, a conversion unit and a maximum / minimum value detection unit. The sampling unit is used to convert an analog signal into a digital signal. The conversion unit is a circuit for converting an analog signal into a digital signal. The maximum value detection unit is used to detect the maximum value of the A / D sampling so as to protect when the analog signal exceeds the maximum value. The minimum value detection unit is used to detect the minimum value of the A / D sampling so as to protect when the analog signal is lower than the minimum value.

[0028] It should be noted that in this embodiment, during the A / D sampling process, each analog signal sampling point will be converted into a digital signal, and these digital signals can be used as inputs in digital signal processing. This application uses a circuit construction method and does not use an analog front end for collection. The battery sampling line is controlled by the on-board compiler and then directly sampled by the A / D after passing through a low-pass MOS switch. In this way, the sampling is completed. In this way, when the battery is discharged to 0V, there is no need to disassemble the battery box when charging. As long as the power signal is given to the battery management system, it can be activated for normal use.

[0029] See also Figure 1-3The heat dissipation component includes a heat dissipation fan 8 and a motor 9. A protective frame is arranged outside the heat dissipation fan 8. The output end of the motor 9 is connected to the heat dissipation fan 8. The motor 9 is fixed on the protective frame. A first through hole 11 is opened at one end of the outer shell of the battery pack 1. The outer circumferential wall of the protective frame outside the heat dissipation fan 8 is connected to the inner circumferential wall of the first through hole 11. Heat dissipation through holes 12 are opened on both sides of the outer shell of the battery pack 1, and the first through hole 11 is communicated with the heat dissipation through hole 12.

[0030] It should be noted that, in this embodiment, the heat dissipation component dissipates heat inside the battery pack 1, and effectively dissipates the heat to ensure the stability and reliability of the use of the energy storage sodium battery.

[0031] See also Figure 3 The heat source conversion component includes a heat source aluminum block 2, a cold source aluminum block 3, a copper wire 4, a constantan wire 5, an external water cooling tube 6 and a conductive block 7. The external water cooling tube 6 is located outside the battery pack 1. The heat source aluminum block 2 is connected to the heat source of the energy storage sodium battery. The outer wall of the cold source aluminum block 3 is connected to the external water cooling tube 6. One end of the copper wire 4 is connected to one side of the heat source aluminum block 2, and the other end of the copper wire 4 is connected to the conductive block 7 and one end of the cold source aluminum block 3 in sequence. One end of the constantan wire 5 is connected to the side of the heat source aluminum block 2 away from the copper wire 4, and the other end of the constantan wire 5 is connected to the side of the cold source aluminum block 3 away from the copper wire 4. The conductive block 7 is electrically connected to the motor 9.

[0032] It should be noted that, in this embodiment, the heat source aluminum block 2 absorbs and transmits the heat on the energy storage sodium battery heat source, the copper wire 4 transmits the heat source on the heat source aluminum block 2, and the cold source aluminum block 3 absorbs and transmits the low temperature on the external water cooling tube 6, so that the wire harness generates a temperature difference from the heat, and the copper wire 4 generates electricity through the thermoelectric principle, thereby causing the conductive block 7 to be charged to supply power to the motor 9. The higher the heat generated by the operation of the energy storage sodium battery heat source, the greater the temperature difference, and the stronger the power output to the motor 9;

[0033] Furthermore, the temperature of the energy storage sodium battery is relatively high during operation, while the temperature of the external water cooling tube 6 located outside the energy storage sodium battery pack 1 is relatively low, thus generating thermoelectricity. Thermoelectricity is a differential electricity phenomenon, a reversible conversion phenomenon between heat energy and electrical energy occurring in a conductor. Two different conductors are connected into a closed loop. If there is a temperature difference at the two junctions, a so-called thermoelectric electromotive force will be generated in the loop. The loop thus formed is called a thermocouple or thermocouple. Conversely, when current flows through the above closed loop, the junctions will release or absorb heat respectively. This phenomenon is called the Peltier effect.

[0034] Furthermore, the heat generated by the battery pack 1 during use is absorbed and utilized, and the heat energy is converted into electrical energy to power the heat dissipation component, thereby dissipating the heat inside the battery pack 1 and effectively dissipating the heat to ensure the stability and reliability of the use of the energy storage sodium battery.

[0035] The application is to collect data through circuit construction without using analog front end. The battery sampling line is controlled by the compiler on the board, and then directly sampled by A / D after passing through the low-pass MOS switch. In this way, the sampling is completed. In this way, when the battery is discharged to 0V, there is no need to disassemble the battery box when charging. As long as the power signal is given to the battery management system, it can be activated for normal use;

[0036] By absorbing and utilizing the heat generated by the battery pack 1 during use, the heat energy is converted into electrical energy to power the heat dissipation component, thereby dissipating the heat inside the battery pack 1 and effectively dissipating the heat to ensure the stability and reliability of the use of the energy storage sodium battery.

[0037] The working principle of the present invention is:

[0038] When in use, the energy storage sodium battery is electrically connected to the compiler control level, low-pass MOS switch and A / D sampling in the board through the battery sampling line, and the energy storage sodium battery pack 1 is used for electricity. The temperature of the energy storage sodium battery is relatively high during operation. The heat source aluminum block 2 absorbs and transmits the heat on the heat source of the energy storage sodium battery, and the copper wire 4 transmits the heat source on the heat source aluminum block 2. The cold source aluminum block 3 absorbs and transmits the low temperature on the external water cooling tube 6. The heat causes a temperature difference in the wiring harness, and electricity is generated on the copper wire 4 through the principle of thermoelectricity, thereby causing the conductive block 7 to be charged to power the motor 9. The cooling fan 8 dissipates the heat inside the battery pack 1, and effectively dissipates the heat to ensure the stability and reliability of the use of the energy storage sodium battery. When the energy storage sodium battery is discharged to 0V, the battery sampling line passes through the compiler control level in the board, and then passes through the low-pass MOS switch and is directly sampled by the A / D. After the sampling is completed, the BMS battery management system is activated during charging for charging. The present application uses a circuit construction method, and does not use an analog front end method for collection. The battery sampling line passes through the on-board compiler to control the level, and then is directly sampled by A / D after passing through a low-pass MOS switch. In this way, sampling is completed. In this way, when the battery is discharged to 0V, there is no need to disassemble the battery box when charging. As long as the battery management system is given a power signal, it can be activated for normal use; and by absorbing and utilizing the heat generated by the battery pack 1 during use, the heat energy is converted into electrical energy to power the heat dissipation component, thereby dissipating the heat inside the battery pack 1, and the heat is effectively dissipated to ensure the stability and reliability of the use of the energy storage sodium battery.

[0039] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A household energy storage sodium-lithium battery management system, comprising a battery pack (1), characterized in that: The battery pack (1) is provided with a sodium energy storage battery, an on-board compiler control level, a low-pass MOS switch and an A / D sampling device. The sodium energy storage battery is electrically connected to the on-board compiler control level, the low-pass MOS switch and the A / D sampling device via a battery sampling line. A heat source conversion component for converting the heat source of the sodium energy storage battery is provided on an outer wall of one side of the battery pack (1). A heat dissipation component for dissipating heat inside the battery pack (1) is provided at one end of the battery pack (1).

2. A household energy storage sodium-lithium battery management system according to claim 1, characterized in that: The detection unit of the low-pass MOS switch includes a switching speed detection unit, a distortion detection unit, a reliability detection unit and a temperature detection unit. The switching speed detection unit is used to detect the switching speed, the distortion detection unit is used to detect distortion and noise in the audio signal, the reliability detection unit is used to detect the reliability of the electronic device or system, and the temperature detection unit is used to detect the ambient temperature of the energy storage sodium battery.

3. A household energy storage sodium-lithium battery management system according to claim 1, characterized in that: The A / D sampling includes a sampling unit, a conversion unit and a maximum / minimum value detection unit. The sampling unit is used to convert an analog signal into a digital signal. The conversion unit is a circuit for converting an analog signal into a digital signal. The maximum value detection unit is used to detect the maximum value of the A / D sampling so as to provide protection when the analog signal exceeds the maximum value. The minimum value detection unit is used to detect the minimum value of the A / D sampling so as to provide protection when the analog signal is lower than the minimum value.

4. A household energy storage sodium-lithium battery management system according to claim 1, characterized in that: The heat dissipation component comprises a heat dissipation fan (8) and a motor (9); a protective frame is arranged outside the heat dissipation fan (8); an output end of the motor (9) is connected to the heat dissipation fan (8); and the motor (9) is fixed on the protective frame.

5. A household energy storage sodium-lithium battery management system according to claim 1, characterized in that: The heat source conversion assembly comprises a heat source aluminum block (2), a cold source aluminum block (3), a copper wire (4), a constantan wire (5), an external water cooling pipe (6) and a conductive block (7); the external water cooling pipe (6) is located outside the battery pack (1); the heat source aluminum block (2) is connected to the heat source of the energy storage sodium battery; and the outer wall of the cold source aluminum block (3) is connected to the external water cooling pipe (6).

6. A household energy storage sodium-lithium battery management system according to claim 5, characterized in that: One end of the copper wire (4) is connected to one side of the heat source aluminum block (2), and the other end of the copper wire (4) is connected to the conductive block (7) and one end of the cold source aluminum block (3) in sequence; one end of the constantan wire (5) is connected to a side of the heat source aluminum block (2) away from the copper wire (4), and the other end of the constantan wire (5) is connected to a side of the cold source aluminum block (3) away from the copper wire (4).

7. A household energy storage sodium-lithium battery management system according to claim 6, characterized in that: The conductive block (7) is electrically connected to the motor (9).

8. A household energy storage sodium-lithium battery management system according to claim 4, characterized in that: A first through hole (11) is provided at one end of the battery pack (1) shell, and the outer circumferential wall of the protective frame outside the heat dissipation fan (8) is connected to the inner circumferential wall of the first through hole (11).

9. A household energy storage sodium-lithium battery management system according to claim 8, characterized in that: Heat dissipation through holes (12) are provided on both sides of the outer shell of the battery pack (1), and the first through hole (11) is in communication with the heat dissipation through hole (12).

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