A battery pack voltage balancing performance monitoring system

Abstract

The present invention discloses a battery pack voltage balance performance monitoring system, including a voltage sensor, wherein the output end of the voltage sensor is connected to a data acquisition module, the voltage sensor is responsible for accurately measuring the voltage value of each single cell, and the analog signal collected by the voltage sensor is transmitted to the data acquisition module, which converts the analog signal into a digital signal and processes the signal, including processing of speed, accuracy and stability. The battery pack voltage balance performance monitoring system controls the synchronous rotation of the half gear and the fan blade, and cooperates with the transmission of the meshing half gear and the gear block to achieve the fan blade to move up and down while blowing air, blow air into the mounting seat over a large range, so that the cold air flows along the conductive sheet in the heat sink, and the cold air carries the heat on the heat sink and sprays out, accelerating the cooling of the heat sink, thereby accelerating the heat dissipation of the heat sink to the battery pack, and avoiding the battery pack from being damaged by excessive temperature due to voltage imbalance.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack monitoring, and in particular to a battery pack voltage balancing performance monitoring system. Background Art

[0002] The battery pack voltage balance performance monitoring system is an important part of the battery management system. It is mainly used to monitor the voltage balance of each single cell in the battery pack to ensure the overall performance, safety and service life of the battery pack.

[0003] However, when the battery pack voltage balancing performance monitoring system monitors the battery pack voltage, it finds that the battery voltage is too high and cannot quickly dissipate heat for the battery in time. Single cells with too high voltage are prone to thermal runaway, which may lead to serious safety accidents such as battery bulging, fire or even explosion.

[0004] Therefore, we propose a battery pack voltage balancing performance monitoring system to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a battery pack voltage balancing performance monitoring system to solve the problem that when the battery pack voltage balancing performance monitoring system proposed in the above background technology monitors the battery pack voltage, it is found that the battery voltage is too high and the battery cannot be quickly cooled in time. The single cell with too high voltage is prone to thermal runaway, which may lead to serious safety accidents such as battery bulging, fire or even explosion.

[0006] To achieve the above object, the present invention provides the following technical solutions: a battery pack voltage equalization performance monitoring system, comprising a voltage sensor, wherein the output end of the voltage sensor is connected to a data acquisition module, the voltage sensor is responsible for accurately measuring the voltage value of each single battery, the analog signal collected by the voltage sensor is transmitted to the data acquisition module, the data acquisition module converts the analog signal into a digital signal, and processes the signal, including processing of speed, accuracy and stability;

[0007] The output end of the data acquisition module is connected to a processing unit, which is composed of a microcontroller or a digital signal processor. The data acquisition module transmits digital voltage data to the processing unit, which analyzes the voltage data of each single battery, calculates the voltage difference between each battery, and determines whether there is a voltage imbalance. According to the degree of voltage imbalance and the overall state of the battery pack, a corresponding voltage balancing strategy is formulated. When the monitored voltage data is abnormal, such as a sudden and large fluctuation in the voltage of a battery or a continuous excess of the normal range, the processing unit can perform fault diagnosis to determine whether it is a problem with the battery itself or a fault in the monitoring system;

[0008] The output end of the processing unit is connected to the balancing module. After the processing unit determines that there is a voltage imbalance, the balancing module will operate the battery pack according to the formulated balancing strategy.

[0009] Preferably, the key component of the data acquisition module is an analog-to-digital converter, which ensures that the analog voltage signal can be accurately converted into a digital signal.

[0010] Preferably, the balancing module includes a passive balancing mode and an active balancing mode. The passive balancing mode releases the excess electricity in the single battery with excessively high voltage in the form of heat energy by means of resistance discharge, thereby reducing its voltage and achieving voltage balancing with other batteries. The active balancing mode uses components such as capacitors, inductors or DC-DC converters to transfer energy from a battery with high voltage to a battery with low voltage.

[0011] Preferably, the output end of the processing unit is also connected to a battery pack heat dissipation module. After the processing unit determines that there is a voltage imbalance, the battery pack heat dissipation module immediately dissipates heat from the battery pack to avoid thermal runaway of single cells with excessively high voltage.

[0012] Preferably, the battery pack heat dissipation module comprises a battery pack shell, a battery cell is installed inside the battery pack shell, an intelligent management module is installed on the battery cell, a mounting seat and a heat sink are installed through the side wall of the battery pack shell, the heat of the battery pack can be discharged through conduction of the heat sink for dissipation, the mounting seat and the heat sink as well as two adjacent heat sinks are interconnected through conduction plates, a mounting frame is installed at the end of the mounting seat, a gear block is installed on the inner wall of the mounting frame, a support plate is slidably penetrated through the side wall of the mounting frame, a motor is installed on the support plate, a rotating shaft is connected to the output end of the motor, a half gear is installed on the outer side of the rotating shaft, the half gear and the gear block are meshed with each other, a fan blade is installed at the end of the rotating shaft, a cleaning brush is installed at the end of the support plate, and the cleaning brush is in contact with the outer wall of the heat sink.

[0013] Preferably, the heat sink, the mounting seat and the conductive sheet are all hollow inside, and the end of the heat sink far from the mounting seat that extends out of the battery pack housing is open.

[0014] Preferably, the installation frame is a U-shaped structure, and tooth blocks are symmetrically distributed on the inner wall of the installation frame.

[0015] Preferably, holes are evenly distributed on the half gear, and the half gear and the fan blade are coaxially connected.

[0016] Preferably, the conductive sheets and heat sinks are symmetrically distributed in four groups about the longitudinal center line of the mounting base, and the conductive sheets at adjacent positions in each group are staggered.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The battery pack voltage balancing performance monitoring system controls the synchronous rotation of the half gear and the fan blade, and cooperates with the transmission of the meshing half gear and the tooth block to realize the reciprocating movement of the fan blade up and down while blowing air, and blows air into the mounting seat over a large range, so that the cold air flows along the conductive plate in the heat sink, and the cold air is ejected with the heat on the heat sink, which speeds up the cooling of the heat sink, thereby speeding up the heat dissipation of the heat sink to the battery pack, and avoiding the battery pack from being damaged by overheating due to voltage imbalance.

[0019] 2) The battery pack voltage balancing performance monitoring system utilizes the transmission of meshing half gears and gear blocks to realize the up and down reciprocating movement of the support plate, thereby controlling the up and down reciprocating movement of the cleaning brush installed at the end to clean the surface of the heat sink to prevent dust from adhering to the heat sink and affecting the heat dissipation efficiency of the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the heat sink structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting seat of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection structure of the mounting base, the heat sink and the conducting sheet of the present invention;

[0025] Figure 6 This is a schematic diagram of the half gear structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the installation framework structure of the present invention.

[0027] In the figure: 1. battery pack housing; 2. battery cell; 3. intelligent management module; 4. heat sink; 5. mounting seat; 6. conduction plate; 7. mounting frame; 8. gear block; 9. support plate; 10. motor; 11. rotating shaft; 12. half gear; 13. fan blade; 14. cleaning brush. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides the following technical solutions.

[0030] It includes a voltage sensor, the output end of which is connected to a data acquisition module. The voltage sensor is responsible for accurately measuring the voltage value of each single battery. The analog signal collected by the voltage sensor is transmitted to the data acquisition module. The data acquisition module converts the analog signal into a digital signal and processes the signal, including processing of speed, accuracy and stability.

[0031] The output end of the data acquisition module is connected to the processing unit, which is composed of a microcontroller or a digital signal processor DSP. The data acquisition module transmits digital voltage data to the processing unit, which analyzes the voltage data of each single battery, calculates the voltage difference between each battery, and determines whether there is voltage imbalance. According to the degree of voltage imbalance and the overall state of the battery pack, a corresponding voltage balancing strategy is formulated. When the monitored voltage data is abnormal, such as a sudden and large fluctuation in the voltage of a battery or a continuous excess of the normal range, the processing unit can perform fault diagnosis to determine whether it is a problem with the battery itself or a fault in the monitoring system.

[0032] Furthermore, the key component of the data acquisition module is the analog-to-digital converter ADC, which ensures that the analog voltage signal can be accurately converted into a digital signal;

[0033] The output end of the processing unit is connected to the balancing module. After the processing unit determines that there is a voltage imbalance, the balancing module will operate the battery pack according to the formulated balancing strategy;

[0034] Furthermore, the balancing module includes a passive balancing mode and an active balancing mode. The passive balancing mode releases the excess electricity in the single battery with excessively high voltage in the form of heat energy by means of resistance discharge, thereby reducing its voltage and achieving voltage balancing with other batteries. The active balancing mode uses components such as capacitors, inductors or DC-DC converters to transfer energy from the battery with high voltage to the battery with low voltage.

[0035] Furthermore, the output end of the processing unit is also connected to the battery pack heat dissipation module. After the processing unit determines that there is a voltage imbalance, the battery pack heat dissipation module immediately dissipates heat from the battery pack to avoid thermal runaway of the single battery with excessively high voltage;

[0036] Furthermore, the battery pack heat dissipation module includes a battery pack shell 1, a battery cell 2 is installed inside the battery pack shell 1, an intelligent management module 3 is installed on the battery cell 2, the processing unit transmits the signal to the intelligent management module 3, and a mounting seat 5 and a heat sink 4 are installed through the side wall of the battery pack shell 1. The heat of the battery pack can be discharged through the heat sink 4 for dissipation. The mounting seat 5 and the heat sink 4 and the two adjacent heat sinks 4 are interconnected through the conduction sheet 6, and the wind flows in the heat sink 4 along the conduction sheet 6. A mounting frame 7 is installed at the end of the mounting seat 5, and a tooth block 8 is installed on the inner wall of the mounting frame 7. A support plate 9 is slidably penetrated on the side wall of the mounting frame 7, so that the mounting frame 7 can support and limit the support plate 9 while ensuring that the support plate 9 can move vertically smoothly, thereby adjusting the blowing position of the fan blade 13. The motor 10 is installed on the support plate 9, and the output end of the motor 10 is connected to the shaft 11. A half gear 12 is installed on the outer side of the shaft 11. The half gear 12 and the tooth block 8 are meshed with each other. When the motor 10 drives the shaft 11 to rotate, the half gear 12 can be controlled to rotate, so that the half gear 12 climbs on the meshing tooth block 8, and the symmetrically distributed tooth block 8 is used to adjust the climbing direction of the half gear 12. A fan blade 13 is installed at the end of the shaft 11. The shaft 11 can control the rotation of the fan blade 13, so that the fan blade 13 box mounting seat 5 blows air. A cleaning brush 14 is installed at the end of the support plate 9. The cleaning brush 14 is fitted with the outer wall of the heat sink 4. When the support plate 9 moves up and down, the cleaning brush 14 can be smoothly driven to move up and down, so that the cleaning brush 14 cleans the fitted heat sink 4 to ensure the cleanliness of the surface of the heat sink 4.

[0037] Furthermore, the interiors of the heat sink 4, the mounting seat 5 and the conducting sheet 6 are all hollow, and the end of the heat sink 4 extending out of the battery pack housing 1 away from the mounting seat 5 is open, so that cold air can flow through the heat sink 4, the mounting seat 5 and the conducting sheet 6, and finally be discharged from the heat sink 4 away from the mounting seat 5, and the heat of the heat sink 4 is carried out by the cold air, so as to quickly cool and dissipate the heat;

[0038] Furthermore, the mounting frame 7 is a "U"-shaped structure, and the inner wall of the mounting frame 7 is symmetrically provided with tooth blocks 8, so that the half gears 12 can alternately mesh with the tooth blocks 8 on the mounting frame 7, so that the fan blades 13 can blow air and cool down during the up and down reciprocating movement, thereby accelerating the cooling speed;

[0039] Furthermore, holes are evenly distributed on the half gear 12, and the half gear 12 and the fan blade 13 are coaxially connected;

[0040] Furthermore, the conductive sheets 6 and the heat sink 4 are symmetrically distributed in four groups about the longitudinal center line of the mounting base 5, and the conductive sheets 6 in adjacent positions of each group are staggered and distributed with each other, which can extend the time for the cold air to flow in the heat sink 4;

[0041] Specifically, the processing unit transmits the signal to the intelligent management module 3, and the intelligent management module 3 controls the motor 10 to work. The motor 10 drives the rotating shaft 11 connected to the output end to rotate clockwise, and the rotating shaft 11 drives the half gear 12 and the fan blade 13 to rotate. The fan blade 13 blows air into the mounting seat 5, and when the half gear 12 rotates clockwise to mesh with the tooth block 8 at the right position, the support plate 9 can be controlled to drive the fan blade 13 to move up, and when the half gear 12 rotates clockwise to mesh with the tooth block 8 at the left position, the support plate 9 can be controlled to drive the fan blade 13 to move down, and a large range of air is blown to the mounting seat 5. The wind blows inside, and flows along the conduction sheet 6 in the heat sink 4, and finally is ejected from the heat sink 4 at the position farthest from the mounting base 5, so that the cold wind is ejected with the heat of the heat sink 4, and the cooling of the heat sink 4 is accelerated, thereby accelerating the heat dissipation of the battery pack by the heat sink 4, and when the support plate 9 moves up and down, the cleaning brush 14 can be controlled to move up and down, and the cleaning brush 14 cleans the surface of the heat sink 4 to prevent dust from adhering to the heat sink 4 and affecting the heat dissipation efficiency of the heat sink 4. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack voltage equalization performance monitoring system, comprising a voltage sensor, characterized in that: The output end of the voltage sensor is connected to the data acquisition module. The voltage sensor is responsible for accurately measuring the voltage value of each single battery. The analog signal collected by the voltage sensor is transmitted to the data acquisition module. The data acquisition module converts the analog signal into a digital signal and processes the signal, including processing of speed, accuracy and stability. The output end of the data acquisition module is connected to a processing unit, which is composed of a microcontroller or a digital signal processor (DSP). The data acquisition module transmits digital voltage data to the processing unit, which analyzes the voltage data of each single battery, calculates the voltage difference between each battery, and determines whether there is voltage imbalance. According to the degree of voltage imbalance and the overall state of the battery pack, a corresponding voltage balancing strategy is formulated. When the monitored voltage data is abnormal, such as a sudden and large fluctuation in the voltage of a battery or a continuous excess of the normal range, the processing unit can perform fault diagnosis to determine whether it is a problem with the battery itself or a fault in the monitoring system; The output end of the processing unit is connected to the balancing module. After the processing unit determines that there is a voltage imbalance, the balancing module will operate the battery pack according to the formulated balancing strategy.

2. A battery pack voltage equalization performance monitoring system according to claim 1, characterized in that: The key component of the data acquisition module is the analog-to-digital converter (ADC), which ensures that the analog voltage signal can be accurately converted into a digital signal.

3. A battery pack voltage equalization performance monitoring system according to claim 1, characterized in that: The balancing module includes a passive balancing mode and an active balancing mode. The passive balancing mode releases the excess electricity in the single battery with excessively high voltage in the form of heat energy through resistance discharge, thereby reducing its voltage and achieving voltage balancing with other batteries. The active balancing mode uses components such as capacitors, inductors or DC-DC converters to transfer energy from the battery with high voltage to the battery with low voltage.

4. The battery pack voltage equalization performance monitoring system according to claim 1, characterized in that: The output end of the processing unit is also connected to a battery pack heat dissipation module. After the processing unit determines that there is a voltage imbalance, the battery pack heat dissipation module immediately dissipates heat from the battery pack to avoid thermal runaway of single cells with excessively high voltage.

5. A battery pack voltage equalization performance monitoring system according to claim 4, characterized in that: The battery pack heat dissipation module comprises a battery pack housing (1), a battery cell (2) is installed inside the battery pack housing (1), an intelligent management module (3) is installed on the battery cell (2), a mounting seat (5) and a heat sink (4) are installed through the side wall of the battery pack housing (1), the heat of the battery pack can be discharged through the heat sink (4) for heat dissipation, the mounting seat (5) and the heat sink (4) as well as two adjacent heat sinks (4) are interconnected through a conducting sheet (6), an installation frame (7) is installed at the end of the mounting seat (5), and the mounting seat (5) is provided with a heat sink (4). A tooth block (8) is installed on the inner wall of the frame (7), a support plate (9) is slidably penetrated on the side wall of the mounting frame (7), a motor (10) is installed on the support plate (9), an output end of the motor (10) is connected to a rotating shaft (11), a half gear (12) is installed on the outer side of the rotating shaft (11), the half gear (12) and the tooth block (8) are meshed with each other, a fan blade (13) is installed at the end of the rotating shaft (11), a cleaning brush (14) is installed at the end of the support plate (9), and the cleaning brush (14) is in contact with the outer wall of the heat sink (4).

6. A battery pack voltage equalization performance monitoring system according to claim 5, characterized in that: The interiors of the heat sink (4), the mounting seat (5) and the conducting sheet (6) are all hollow, and the end of the heat sink (4) that is away from the mounting seat (5) and extends out of the battery pack housing (1) is open.

7. The battery pack voltage equalization performance monitoring system according to claim 5, characterized in that: The installation frame (7) is a U-shaped structure, and tooth blocks (8) are symmetrically distributed on the inner wall of the installation frame (7).

8. The battery pack voltage equalization performance monitoring system according to claim 5, characterized in that: The half gear (12) is evenly distributed with holes, and the half gear (12) and the fan blade (13) are coaxially connected.

9. The battery pack voltage equalization performance monitoring system according to claim 5, characterized in that: The conductive sheets (6) and the heat sinks (4) are symmetrically distributed in four groups about the longitudinal center line of the mounting seat (5), and the conductive sheets (6) in adjacent positions of each group are staggered.

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