CN217692714U - Energy storage power supply - Google Patents
Energy storage power supply Download PDFInfo
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- CN217692714U CN217692714U CN202221041867.8U CN202221041867U CN217692714U CN 217692714 U CN217692714 U CN 217692714U CN 202221041867 U CN202221041867 U CN 202221041867U CN 217692714 U CN217692714 U CN 217692714U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses an energy storage power supply, include: the battery pack comprises a battery pack, an on-off module, a converter module, a detection module and a control module, wherein the on-off module is connected with the battery pack and is used for cutting off power supply and charging of the battery pack; the converter module is connected with the battery pack through the on-off module and is used for performing voltage conversion so as to charge the battery pack or supply power to a load; the detection module is connected with the battery pack and used for detecting battery parameters of the battery pack, wherein the battery parameters comprise at least any one of charge-discharge capacity, cycle number, internal resistance value and self-discharge capacity; and the control module is connected with the detection module and the on-off module, and is used for controlling the on-off module to disconnect the battery pack so as to cut off the electrification of the converter module when the battery parameter reaches a preset battery attenuation condition. Management measures and protection mechanisms for the battery pack are realized.
Description
Technical Field
The utility model relates to a power technology field especially relates to an energy storage power.
Background
The energy storage power supply is a multifunctional portable power supply which is internally provided with a rechargeable battery, can store electric energy and has alternating current output. It has the characteristics of light weight, high capacity, high power and convenient carrying, and can be used indoors or outdoors. The user carries the energy storage power to appointed place usually, and the electric quantity of storing through the battery supplies with other equipment and exports the power consumption, is applied to keeping away from the commercial power or some outdoor power consumptions usually, for example, can use field emergency, natural disasters are emergent, outdoor tourism, commercial trip, outdoor operations, field party, power failure emergency etc. field.
Outdoor energy storage type product has capacious, the big characteristics of energy, and its group battery product capacity can attenuate and the performance can weaken in the cycle process, and there is the life-span parameter in the battery, if reach certain number of times after using, if still use and to have the potential safety hazard. The battery management system of the outdoor energy storage type power supply on the market only has some basic protection functions on the battery, such as overcharge, short circuit, overcurrent, disconnection, low power and other protection functions, but the battery pack has no management measures and mechanisms after repeated cyclic aging, capacity attenuation and performance degradation.
SUMMERY OF THE UTILITY MODEL
The utility model provides an energy storage power aims at solving the group battery of current energy storage power and lacks the problem of management measure and mechanism after recycling certain number of times.
In a first aspect, the present invention provides an energy storage power supply, including: the battery pack comprises a battery pack, an on-off module, a converter module, a detection module and a control module, wherein the on-off module is connected with the battery pack and is used for cutting off power supply and charging of the battery pack; the converter module is connected with the battery pack through the on-off module and is used for performing voltage conversion so as to charge the battery pack or supply power to a load; the detection module is connected with the battery pack and used for detecting battery parameters of the battery pack, wherein the battery parameters comprise at least any one of charge-discharge capacity, cycle number, internal resistance value and self-discharge capacity; and the control module is connected with the detection module and the on-off module and is used for controlling the on-off module to disconnect the battery pack so as to cut off the electrification of the converter module when the battery parameters reach the preset battery attenuation condition.
Further, the detection module comprises a first detection unit and a sampling resistor, the first detection unit is connected with the battery pack through the sampling resistor, the first detection unit is connected with the control module, and the first detection unit is used for detecting the current of the sampling resistor.
Furthermore, the detection module comprises a second detection unit, the acquisition end of the second detection unit is connected with the battery pack, the output end of the second detection unit is connected with the control module, and the second detection unit is used for acquiring the battery parameters of each battery string in the battery pack.
Further, the first detection unit is a bipolar ADC detection element; and/or the second detection unit is an analog front end detection element.
Furthermore, the on-off module comprises a charging switch unit and a discharging switch unit, wherein the input end of the charging switch unit is connected with the converter module, the output end of the charging switch unit is connected with the battery pack, and the charging switch unit is used for controlling the charging on and off of the battery pack; the input end of the discharge switch unit is connected with the battery pack, the output end of the discharge switch unit is connected with the converter module, the discharge switch unit is used for controlling the on and off of the discharge of the battery pack, and the charge switch unit and the discharge switch unit are connected with the control module.
Further, the charging switch unit comprises a first switch tube and a second switch tube, the input end of the first switch tube is connected with the converter module, the output end of the first switch tube is connected with the battery pack, the control end of the first switch tube is connected with the second switch tube, and the control end of the second switch tube is connected with the control module.
Further, the first switch tube is a PMOS tube, the second switch tube is an NMOS tube, a source electrode of the PMOS tube is connected with the converter module, a drain electrode of the PMOS tube is connected with the battery pack, a gate electrode of the PMOS tube is connected with a drain electrode of the NMOS tube, a source electrode of the NMOS tube is grounded, and a gate electrode of the NMOS tube is connected with the control module.
Further, the discharge switch unit comprises a third switch tube and a fourth switch tube, the input end of the third switch tube is connected with the battery pack, the output end of the third switch tube is connected with the converter module, the control end of the third switch tube is connected with the fourth switch tube, and the control end of the fourth switch tube is connected with the control module.
Furthermore, the third switch tube is a PMOS tube, the fourth switch tube is an NMOS tube, a source electrode of the PMOS tube is connected with the battery pack, a drain electrode of the PMOS tube is connected with the converter module, a grid electrode of the PMOS tube is connected with a drain electrode of the NMOS tube, the source electrode of the NMOS tube is grounded, and the grid electrode of the NMOS tube is connected with the control module.
Further, the energy storage power supply further comprises a display module, the display module is connected with the control module, and the display module is used for displaying early warning information of capacity attenuation of the battery pack.
Compared with the prior art, the beneficial effects of the utility model are that: the battery pack is connected with the converter module through the on-off module, the control module detects battery parameters of the battery pack through the detection module, the battery parameters comprise at least any one of charge and discharge capacity, cycle times, internal resistance and self-discharge capacity, when the detected battery parameters reach a battery attenuation condition, the controller module controls the on-off module to disconnect the battery pack, and therefore the converter module is cut off to charge the battery pack or the converter module is cut off to supply power to a load, therefore, the battery pack is managed by whether the battery parameters reach the battery attenuation condition, when the battery pack capacity is attenuated to influence the use, the battery pack is cut off in time, potential safety hazards caused by the fact that the battery pack is continuously used are avoided, and safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 shows a schematic circuit diagram of an energy storage power supply according to an embodiment of the present invention;
fig. 2 shows a circuit diagram of an energy storage power supply according to an embodiment of the present invention;
fig. 3 shows a circuit diagram of an on-off module of an energy storage power supply according to an embodiment of the present invention;
10. a battery pack; 20. a switching module; 21. a charging switch unit; 22. a discharge switch unit; 30. a converter module; 40. a detection module; 41. a first detection unit; 42. a second detection unit; 50. a control module; 60. and a display module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, an embodiment of the present invention provides an energy storage power supply, including: the battery pack comprises a battery pack 10, an on-off module 20, a converter module 30, a detection module 40 and a control module 50, wherein the on-off module 20 is connected with the battery pack 10, and the on-off module 20 is used for cutting off power supply and charging of the battery pack 10; a converter module 30 connected to the battery pack 10 through the on-off module 20, wherein the converter module 30 is configured to perform voltage conversion to charge the battery pack 10 or supply power to a load; the detection module 40 is connected with the battery pack 10, and the detection module 40 is configured to detect a battery parameter of the battery pack 10, where the battery parameter includes at least any one of charge and discharge capacity, cycle number, internal resistance value, and self-discharge capacity; and the control module 50 is connected with the detection module 40 and the on-off module 20, and the control module 50 is used for controlling the on-off module 20 to disconnect the battery pack 10 to cut off the power of the converter module 30 when the battery parameter reaches a preset battery attenuation condition.
By implementing the embodiment, whether the battery parameters reach the battery attenuation condition is used as a management measure and a protection mechanism for the battery pack 10, and when the capacity of the battery pack 10 is attenuated to influence the use, the battery pack 10 is cut off in time, so that potential safety hazards caused by the continuous use of the battery pack 10 are avoided, and the safety is improved.
It should be noted that the battery fade condition of the present embodiment may be various types of conditions.
For example, the battery decay condition may be that the number of cycles reaches a target number, where the number of cycles refers to the number of battery charges and discharges, and the target number is, for example, 1000 times, 2000 times, or other numbers, and the like, and is not limited herein. The detection principle of the cycle number is as follows: the detection and determination are performed by accumulating the charging capacity and the discharging capacity, and the detection principle of the cycle number is briefly described above, and is well known to those skilled in the art, and will not be described herein again. When the cycle number of the battery pack 10 reaches the target number, which indicates that the battery is used for many times and the service life of the battery is about to be used up, the control module 50 controls the on-off module 20 to disconnect the battery pack 10 and cut off the power supply of the battery pack 10 to the converter module 30, so that the management of the battery pack 10 is realized and the power utilization safety is ensured.
Illustratively, the battery fade condition may be that the charge-discharge capacity reaches a target fade capacity. Generally, the capacity of the battery in normal use is a standard capacity, and the fading capacity is a percentage of the standard capacity, such as 50%, or 60%, or other percentages, and the like, and is not limited herein. The percentage of this example is based on taking the average of the first few complete charge and discharge capacities of the battery as the initial standard capacity and referring to the initial standard capacity fade percentage. Wherein, the charge-discharge capacity detection principle: j1 The (bipolar ADC) will detect the current and current direction on the R8 resistor, send the digital information to the MCU (control module 50), which converts to battery capacity by integration of the current. Whether the current is charged or discharged is determined by the direction of the current, and thus, whether the current is charged or discharged is determined. The charge and discharge capacity detection principle is briefly described above, and is well known to those skilled in the art, and will not be described herein again. When the charging and discharging capacity of the battery pack 10 reaches the attenuation capacity, which indicates that the battery capacity has been attenuated to a few, and the service life of the battery is about to be used up, the control module 50 controls the on-off module 20 to disconnect the battery pack 10 and cut off the energization of the converter module 30 by the battery pack 10, so that the management of the battery pack 10 is realized, and the power utilization safety is ensured.
For example, the battery fade condition may be that the internal resistance value reaches an internal resistance threshold value. Generally, the internal resistance of the battery is small when the battery is normally used, and when the capacity of the battery begins to decay, the internal resistance of the battery also correspondingly increases. Therefore, the internal resistance threshold may be 10 ohms, 15 ohms, or other values, and is not limited herein. Wherein, the internal resistance detection principle: there are many methods for detecting internal resistance, and the following methods are used as reference methods: after the battery is fully charged, discharging to a platform V1 by adopting a standard current I1, and then measuring a voltage V2 and a battery internal resistance value after the current of the multiplying power I2 lasts for 2-3 seconds: (V2-V1)/(I2-I1). This is done by the MCU internal algorithm. It is understood that other methods for measuring internal resistance are possible, and the method for measuring internal resistance is well known to those skilled in the art and will not be described herein. When the internal resistance value of the battery pack 10 increases to the internal resistance threshold value, which indicates that the battery pack 10 has decayed to a certain extent and the internal resistance is very high, and the service life of the battery is about to be used up, the control module 50 controls the on-off module 20 to disconnect the battery pack 10, and cuts off the power supply of the battery pack 10 to the converter module 30, so that the management of the battery pack 10 is realized, and the power utilization safety is ensured.
Illustratively, the battery fade condition may be that the self-discharge capacity reaches a self-discharge capacity target value. The phenomenon that the electric quantity automatically reduces when the battery is not used is called self-discharge. The self-discharge capacity target value refers to a difference threshold between the capacity of the battery at full charge and the capacity of the battery after self-discharge. Wherein, the self-discharge detection principle: and (3) after the battery is fully charged, standing for a period of time, calculating the discharge capacity, judging the difference value between the discharge capacity and the standard discharge capacity, judging for many times, and if the difference value is large, indicating that micro short circuit or polarization and the like possibly exist in the battery. The self-discharge detection principle is briefly described above, and is well known to those skilled in the art, and will not be described herein. When the self-discharge capacity of the battery pack 10 reaches the target value of the self-discharge capacity, it indicates that there may be damage inside the battery pack 10 and the service life of the battery is about to be used up, the control module 50 controls the on-off module 20 to disconnect the battery pack 10 and cut off the energization of the battery pack 10 to the converter module 30, so as to manage the battery pack 10 and ensure the power utilization safety.
In the present embodiment, the battery fade condition may be at least any one of the above-described examples, assuming that the battery fade condition is that the charge-discharge capacity reaches the target fade capacity is condition 1; the battery fade condition is that the charge-discharge capacity reaches the target fade capacity, which is condition 2; the battery attenuation condition is that the internal resistance value reaches an internal resistance threshold value, and the condition is 3; the cell fade condition was that the self-discharge capacity reached the target value of the self-discharge capacity, which was condition 4.
In one embodiment, the cell fade condition a may be condition 1 or condition 2 or condition 3 or condition 4, as described above.
In another embodiment, the cell fade condition B may be any combination of the above two conditions, for example, condition 1& condition 2, condition 2& condition 3, condition 1& condition 3, condition 3& condition 4, condition 1& condition 4, and condition 2& condition 4.
In yet another embodiment, the cell fade condition C may also be any combination of the above three conditions, for example, condition 1& condition 2& condition 3, condition 2& condition 3& condition 4, condition 1& condition 2& condition 4.
In yet another embodiment, the battery fade condition D may also be condition 1& condition 2& condition 3& condition 4.
In other embodiments, the cell fade condition may also be AandB, aandC, aandD, bandC, bandD, candD, or may take the form of or, aorB, aorC, aorD, borC, borD, corD. The battery decay condition can also be derived by an artificial intelligence algorithm, a deep learning algorithm or a neural network algorithm according to the battery parameters. In summary, the present embodiment collects the battery parameters, sets the battery attenuation conditions by using the battery parameters, and how the battery attenuation conditions are combined and obtained is set according to the actual requirements, which is not limited herein.
It should be noted that the battery fade condition in this embodiment may also be dynamically adjusted in combination with the ambient temperature, further increasing the accuracy of the lifetime prediction of the battery pack 10.
In an embodiment, the detecting module 40 includes a first detecting unit 41 and a sampling resistor R8, the first detecting unit 41 is connected to the battery pack 10 through the sampling resistor R8, the first detecting unit 41 is connected to the control module 50, and the first detecting unit 41 is configured to detect a current of the sampling resistor R8. The first detection unit 41 is a bipolar ADC detection element (analog-to-digital conversion chip), which can detect the charging and discharging current of the battery through the current detection sampling resistor R8, detect the direction of the current of R8, and transmit a digital signal to the MCU control module 50. The direction of the current is judged by the bipolar ADC in cooperation with the resistor R8, and then whether the battery pack 10 is charged or discharged is judged, so that the charging capacity and the discharging capacity of the battery pack 10 are calculated.
In an embodiment, the detecting module 40 includes a second detecting unit 42, a collecting terminal of the second detecting unit 42 is connected to the battery pack 10, an output terminal of the second detecting unit 42 is connected to the control module 50, and the second detecting unit 42 is configured to collect a battery parameter of each string of batteries in the battery pack 10. The second detection unit 42 is an analog front end detection element (AFE), which detects each string of batteries of the battery pack 10 and transmits each string of battery information to the MCU. Specifically, information such as the voltage, temperature, and capacity of each string of cells in the battery pack 10 is detected by an analog front end detection element.
In one embodiment, the on-off module 20 includes a charging switch unit 21 and a discharging switch unit 22, an input end of the charging switch unit 21 is connected to the converter module 30, an output end of the charging switch unit 21 is connected to the battery pack 10, and the charging switch unit 21 is configured to control on and off of charging of the battery pack 10; the input end of the discharge switch unit 22 is connected to the battery pack 10, the output end of the discharge switch unit 22 is connected to the converter module 30, the discharge switch unit 22 is used for controlling the on and off of the discharge of the battery pack 10, and the charge switch unit 21 and the discharge switch unit 22 are both connected to the control module 50.
Since the converter module 30 includes a charging module for voltage conversion when charging the battery pack 10 and a discharging module for voltage conversion when discharging a load. Accordingly, a charging switch unit 21 is disposed in the on-off module 20 to control the on-off of the charging module, and a discharging switch unit 22 is disposed in the on-off module 20 to control the on-off of the discharging module. The charging switch unit 21 and the discharging switch unit 22 are controlled by the control module 50, and when the control module 50 detects that the battery attenuation condition is reached, the charging switch unit 21 is controlled to be switched off, so that the charging module is switched off to charge the battery pack 10; and controlling the discharge switch unit 22 to be turned off, thereby cutting off the power supply of the discharge module to the load.
In this embodiment, the charging switch unit 21 includes a first switch tube M2 and a second switch tube M4, an input end of the first switch tube M2 is connected to the converter module 30, an output end of the first switch is connected to the battery pack 10, a control end of the first switch tube M2 is connected to the second switch tube M4, and a control end of the second switch tube M4 is connected to the control module 50.
The first switch tube M2 is used as a switch for conducting between the battery pack 10 and the charging module of the converter module 30, and the second switch tube M4 is connected to the control end of the first switch tube M2 and used as a switch for controlling the first switch tube M2 to be switched on or off. Specifically, the control module 50 sends a conduction electrical signal to the second switching tube M4 to control the conduction of the second switching tube M4, and since the first switching tube M2 is controlled by the second switching tube M4, the first switching tube M2 is also conducted, and the converter module 30 can charge the battery pack 10. The control module 50 sends an off signal to the second switching tube M4 to control the second switching tube M4 to be turned off, and since the first switching tube M2 is controlled by the second switching tube M4, the second switching tube M4 is also turned off, the converter module 30 is cut off, and the battery pack 10 cannot be charged.
Specifically, the first switch tube M2 is a PMOS tube, the second switch tube M4 is an NMOS tube, a source electrode of the PMOS tube is connected to the converter module 30, a drain electrode of the PMOS tube is connected to the battery pack 10, a gate electrode of the PMOS tube is connected to a drain electrode of the NMOS tube, a source electrode of the NMOS tube is grounded, and a gate electrode of the NMOS tube is connected to the control module 50. The charging switch unit 21 further includes a fourth resistor R4 and a seventh resistor R7, two ends of the fourth resistor R4 are connected to the drain and the gate of the PMOS transistor, and two ends of the seventh resistor R7 are connected to the gate of the PMOS transistor and the drain of the NMOS transistor. When the control module 50 applies a high level to the NMOS transistor, the NMOS transistor is turned on, and the gate voltage of the PMOS transistor is pulled low by the fourth resistor R4, so that the PMOS transistor is turned on. When the control module 50 applies a low level to the NMOS transistor, the NMOS transistor is turned off, and the PMOS transistor is also turned off. It is understood that, in other embodiments, the first switching tube M2 and the second switching tube M4 may also be other types of switching tubes, such as a diode, a triode, an IGBT, and the like, and may be specifically configured according to actual requirements.
In this embodiment, the discharge switch unit 22 includes a third switch tube M1 and a fourth switch tube M3, an input end of the third switch tube M1 is connected to the battery pack 10, an output end of the third switch tube M1 is connected to the converter module 30, a control end of the third switch tube M1 is connected to the fourth switch tube M3, and a control end of the fourth switch tube M3 is connected to the control module 50.
The third switching tube M1 is used as a conducting switch between the battery pack 10 and a discharge module of the converter module 30, and the fourth switching tube M3 is connected to a control end of the third switching tube M1 and used as a switch for controlling the third switching tube M1 to be turned on or off. Specifically, the control module 50 sends a conducting electric signal to the fourth switching tube M3 to control the fourth switching tube M3 to be conducted, and since the third switching tube M1 is controlled by the fourth switching tube M3, the third switching tube M1 is also conducted, and the converter module 30 can supply power to the load. The control module 50 sends a turn-off electric signal to the fourth switching tube M3 to control the fourth switching tube M3 to be turned off, and since the third switching tube M1 is controlled by the fourth switching tube M3, the fourth switching tube M3 is also turned off, and the converter module 30 is cut off, so that power cannot be supplied to the load.
Specifically, the third switching tube M1 is a PMOS tube, the fourth switching tube M3 is an NMOS tube, a source electrode of the PMOS tube is connected to the battery pack 10, a drain electrode of the PMOS tube is connected to the converter module 30, a gate electrode of the PMOS tube is connected to a drain electrode of the NMOS tube, a source electrode of the NMOS tube is grounded, and a gate electrode of the NMOS tube is connected to the control module 50. The discharge switch unit 22 further includes a fifth resistor R5 and a sixth resistor R6, two ends of the fifth resistor R5 are connected to the drain and the gate of the PMOS transistor, and two ends of the sixth resistor R6 are connected to the gate of the PMOS transistor and the drain of the NMOS transistor. When the control module 50 applies a high level to the NMOS transistor, the NMOS transistor is turned on, and the gate voltage of the PMOS transistor is pulled low by the fifth resistor R5, so that the PMOS transistor is turned on. When the control module 50 applies a low level to the NMOS transistor, the NMOS transistor is turned off, and the PMOS transistor is also turned off. It is understood that, in other embodiments, the first switching tube and the second switching tube may also be other types of switching tubes, for example, a diode, a triode, an IGBT, and the like, which may be specifically configured according to actual requirements.
In an embodiment, the energy storage power supply further includes a display module 60, the display module 60 is connected to the control module 50, and the display module 60 is configured to display the warning information of the capacity degradation of the battery pack 10. Specifically, the display module 60 is a display screen, and when the battery capacity reaches the attenuation condition, the control module 50 controls the display screen to display the warning information to remind the user to stop using or replace the battery.
The following brief description of the working principle of the present embodiment is made with reference to the drawings:
the MCU control module 50U1 is a micro-control processor, or a module for communicating with a plurality of control processors. There are a plurality of IO ports that can be converted to capacity by the current digital signal delivered by J1 of the detection module 40, plus the algorithm of the internal timer. The charge and discharge capacity is identified by the current direction judgment. So as to convert the detection into cycle times, internal resistance detection and self-discharge detection.
First, battery parameters of the battery pack 10, including charge and discharge capacity, cycle number, internal resistance, and self-discharge capacity, are collected by the bipolar ADC and the analog front-end chip, and the collected battery parameters are transmitted to the control module 50MCU by the bipolar ADC and the analog front-end chip. Then, the MCU judges according to the battery parameters, when the battery parameters reach the battery attenuation condition, the pins 8 and 9 of the MCU control the on-off of the on-off module 20, the pin 8 controls the on-off of discharging, and the pin 9 controls the on-off of charging. Finally, the MCU control module 50 determines that the battery pack 10 is up to the end of its life and there is a risk that the battery will be aged and continuously used, controls the on-off module 20 to turn off the battery pack 10, cuts off the power of the following converter, locks the whole product, and controls the display module 60 to remind the user to stop using or replace the battery.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. An energy storage power supply, comprising:
a battery pack;
the on-off module is connected with the battery pack and used for cutting off power supply and charging of the battery pack;
the converter module is connected with the battery pack through the on-off module and is used for performing voltage conversion so as to charge the battery pack or supply power to a load;
the detection module is connected with the battery pack and used for detecting battery parameters of the battery pack, wherein the battery parameters comprise at least any one of charge-discharge capacity, cycle number, internal resistance value and self-discharge capacity;
and the control module is connected with the detection module and the on-off module and is used for controlling the on-off module to disconnect the battery pack so as to cut off the electrification of the converter module when the battery parameters reach the preset battery attenuation condition.
2. The energy storage power supply according to claim 1, wherein the detection module comprises a first detection unit and a sampling resistor, the first detection unit is connected to the battery pack through the sampling resistor, the first detection unit is connected to the control module, and the first detection unit is configured to detect a current of the sampling resistor.
3. The energy storage power supply according to claim 2, wherein the detection module comprises a second detection unit, an acquisition end of the second detection unit is connected with the battery pack, an output end of the second detection unit is connected with the control module, and the second detection unit is used for acquiring battery parameters of each string of batteries in the battery pack.
4. The energy storage power supply according to claim 3, wherein the first detection unit is a bipolar ADC detection element; and/or the second detection unit is an analog front end detection element.
5. The energy storage power supply according to claim 1, wherein the on-off module comprises a charging switch unit and a discharging switch unit, an input end of the charging switch unit is connected with the converter module, an output end of the charging switch unit is connected with the battery pack, and the charging switch unit is used for controlling the charging of the battery pack to be switched on and off; the input end of the discharge switch unit is connected with the battery pack, the output end of the discharge switch unit is connected with the converter module, the discharge switch unit is used for controlling the on and off of the discharge of the battery pack, and the charge switch unit and the discharge switch unit are connected with the control module.
6. The energy storage power supply according to claim 5, wherein the charging switch unit comprises a first switch tube and a second switch tube, an input end of the first switch tube is connected with the converter module, an output end of the first switch tube is connected with the battery pack, a control end of the first switch tube is connected with the second switch tube, and a control end of the second switch tube is connected with the control module.
7. The energy storage power supply according to claim 6, wherein the first switch tube is a PMOS tube, the second switch tube is an NMOS tube, a source electrode of the PMOS tube is connected with the converter module, a drain electrode of the PMOS tube is connected with the battery pack, a gate electrode of the PMOS tube is connected with a drain electrode of the NMOS tube, a source electrode of the NMOS tube is grounded, and a gate electrode of the NMOS tube is connected with the control module.
8. The energy storage power supply according to claim 5, wherein the discharge switch unit comprises a third switch tube and a fourth switch tube, an input end of the third switch tube is connected with the battery pack, an output end of the third switch tube is connected with the converter module, a control end of the third switch tube is connected with the fourth switch tube, and a control end of the fourth switch tube is connected with the control module.
9. The energy storage power supply according to claim 8, wherein the third switching tube is a PMOS tube, the fourth switching tube is an NMOS tube, a source electrode of the PMOS tube is connected with the battery pack, a drain electrode of the PMOS tube is connected with the converter module, a gate electrode of the PMOS tube is connected with a drain electrode of the NMOS tube, a source electrode of the NMOS tube is grounded, and a gate electrode of the NMOS tube is connected with the control module.
10. The energy storage power supply according to any one of claims 1-9, further comprising a display module, wherein the display module is connected to the control module, and the display module is configured to display warning information of capacity fading of the battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221041867.8U CN217692714U (en) | 2022-04-29 | 2022-04-29 | Energy storage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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