Energy storage equipment system
By using sodium batteries and a redesigned BMS to monitor voltage, current, and temperature in real time, the problem of insufficient battery performance in existing energy storage devices is solved, achieving high temperature resistance, low temperature adaptability, and environmentally friendly energy storage effects.
Patent Information
- Application Number
- CN202511044609.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-28
- Publication Date
- 2025-11-25
AI Technical Summary
Among existing energy storage devices, lead-acid batteries have low energy density and few cycle counts, while lithium batteries are expensive, flammable, explosive, and have poor low-temperature performance, resulting in poor performance.
It uses sodium batteries and is equipped with a temperature monitoring module and a redesigned BMS to monitor voltage, current and temperature in real time, adjust charging and discharging strategies, and achieve real-time monitoring and safety management by combining human-machine interaction components.
It improves temperature resistance, enhances low-temperature adaptability, increases cycle life and capacity, reduces production costs, and is environmentally friendly and pollution-free.
Smart Images
Figure CN121012152A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of energy storage technology, and more specifically, relates to an energy storage device system. Background Technology
[0002] Existing energy storage devices mainly consist of batteries, BMS (Battery Management System), input interfaces, output interfaces, and human-machine interface components.
[0003] Existing energy storage devices mainly use two types of batteries—lead-acid batteries and lithium batteries. Lead-acid batteries, due to their low energy density and limited cycle life, have been gradually phased out of the market. The main problems with lithium batteries are their relatively high price, the high risk of fire and explosion at high temperatures, and their lower activity at low temperatures, leading to poor performance (or even inability to use) in these conditions.
[0004] Therefore, a new solution is urgently needed. Summary of the Invention
[0005] In view of the technical defects mentioned in the background art, the purpose of this invention is to provide an energy storage device system that aims to at least partially solve one of the technical problems in the prior art.
[0006] This invention provides an energy storage device system, including a battery, a battery management system (BMS), and input / output interfaces, and further including a temperature monitoring module electrically connected to the battery and the BMS respectively; wherein, the battery is a sodium battery, and the BMS has pre-set parameter information corresponding to the battery and is configured as follows:
[0007] The voltage and current information in the real-time monitoring circuit is combined with the parameter information and the monitored battery temperature to adjust the charging / discharging strategy until the set charging / discharging cutoff conditions are reached.
[0008] Preferably, the energy storage device system further includes a human-machine interface component, which is connected to the control module in the BMS, and the control module is further configured to:
[0009] The battery charging and discharging can be controlled by the human-computer interaction component, or it can operate independently.
[0010] At the same time, the obtained parameters are continuously displayed on the human-computer interaction component for real-time monitoring.
[0011] Preferably, the parameter information includes SOC-voltage curve, charge / discharge cutoff voltage and current, charge / discharge rate at different temperatures, cycle life, and SOH;
[0012] The charging strategy during the charging phase specifically includes:
[0013] First, determine whether it is suitable to charge based on the monitored cell temperature; if not, it is necessary to cool down or heat up to a suitable temperature.
[0014] If suitable, then determine the current SOC of the battery cell based on the monitored voltage and the SOC-voltage curve.
[0015] If the device is in an overcharge / over-discharge state, it will indicate that it cannot be charged and requires repair.
[0016] If the SOC state is within the preset first or second range, it will enter trickle charging state.
[0017] If the SOC state is within the preset third range, the electrical signal is continuously adjusted for charging according to the pre-defined charging method.
[0018] Preferably, the discharge strategy during the discharge phase specifically includes:
[0019] First, determine whether it is suitable to discharge based on the monitored cell temperature; if not, the temperature needs to be lowered or raised to a suitable level.
[0020] If suitable, then determine the current SOC of the battery cell based on the monitored voltage and the SOC-voltage curve.
[0021] If it is in an overcharge / over-discharge state, it will indicate that it cannot discharge and needs repair;
[0022] If the SOC state is within the preset fourth interval range, the corresponding electrical signal will be output according to the communication result with the load.
[0023] If the battery is in the preset fifth range of SOC, a low battery warning will be displayed and the battery will enter trickle discharge mode.
[0024] Preferably, the cooling or heating to a suitable temperature specifically includes:
[0025] When cooling is required, the heat dissipation module adjusts the temperature to a suitable level.
[0026] When heating is required, the internal resistance of the battery cell is used for heating or a heating module is used to adjust to a suitable temperature.
[0027] Preferably, the BMS also includes a deployed counter and a SOH (State of Health) detector. When the cell cycle life reaches a set value or the SOH is less than or equal to a set threshold, it indicates that the cell cannot be charged or discharged and requires maintenance.
[0028] Preferably, the BMS also includes a side module, which is used to realize multi-functional combinations.
[0029] The beneficial effects achieved by this invention through the use of a sodium battery and the supplementary redesign of the BMS control are as follows:
[0030] 1. High temperature resistance, more resistant to temperature than lithium batteries;
[0031] 2. Sodium batteries have excellent low-temperature performance, and can still be charged and discharged in an environment of -40℃, while effectively maintaining their usable capacity;
[0032] 3. Abundant raw material sources: Compared to the scarcity of lithium ore, sodium reserves are plentiful, and economies of scale can further reduce production and manufacturing costs.
[0033] 4. High cycle life: Compared to polymer lithium batteries, which have only about 500 cycles, sodium batteries can achieve 2,000 cycles or more.
[0034] 5. Environmentally friendly: Compared to lead-acid batteries with lead ion heavy metal pollution and ternary lithium batteries with cobalt, nickel and other heavy metal pollution, sodium batteries are more environmentally friendly.
[0035] 6. It has a higher usable capacity. Compared with the 50%-60% usable capacity of portable energy storage devices using polymer batteries on the market, sodium batteries have a usable capacity of over 90%. Attached Figure Description
[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0037] Figure 1 A structural block diagram of an energy storage device system provided in an embodiment of the present invention;
[0038] Figure 2 This is a schematic diagram illustrating the effect of temperature on the charging and discharging strategy provided in an embodiment of the present invention;
[0039] Figure 3 This is a schematic diagram of the charge / discharge cutoff voltage and current provided in an embodiment of the present invention. Detailed Implementation
[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0041] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0042] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0043] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "in an embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination.
[0044] SOC: State of Charge;
[0045] SOH: State of Health, is a key indicator for measuring the degree of performance degradation of a battery (or cell) relative to its initial state.
[0046] Sodium batteries, also known as sodium-ion batteries, are rechargeable batteries that use sodium ions as charge carriers. Their working principle is similar to that of lithium-ion batteries, where charge is stored and released through the insertion and extraction of sodium ions between the positive and negative electrodes.
[0047] It should be noted that, unless otherwise stated, the technical terms used in this embodiment have the common meaning as understood in the relevant technical field.
[0048] Reference Figures 1 to 3 This invention provides an energy storage device system, including a battery, a battery management system (BMS), and input / output interfaces, and further including a temperature monitoring module electrically connected to the battery and the BMS respectively; wherein, the battery is a sodium battery, and the BMS has pre-set parameter information corresponding to the battery and is configured as follows:
[0049] The voltage and current information in the real-time monitoring circuit is combined with the parameter information and the monitored battery temperature to adjust the charging / discharging strategy until the set charging / discharging cutoff conditions are reached.
[0050] In this embodiment, only the content that has made contributions is described. The BMS described in the prior art also includes voltage and current sensors, rectifier and filter circuits, transformer modules and BMS circuits that are mature in the field, which will not be described in detail here.
[0051] During implementation, external electrical energy is transmitted to the rectifier and filter circuit of the BMS through the input interface, which converts the input current containing noise (referring to irregular electrical signals in the current) into a regular current; the transformer module in the BMS then adjusts this regular current to a suitable voltage and current to charge the battery.
[0052] Battery temperature is monitored by a temperature monitoring module; the parameter information includes SOC-voltage curve, charge / discharge cutoff voltage and current, charge / discharge rate at different temperatures, cycle life, and SOH, etc.
[0053] The energy storage device system further includes a human-machine interface component, which is connected to the control module in the BMS. The control module is further configured to:
[0054] The battery charging and discharging can be controlled by the human-computer interaction component, or it can operate independently.
[0055] At the same time, the obtained parameters are continuously presented on the human-computer interaction component for real-time monitoring; for example, during the charging and discharging phase, all information such as SOC, voltage, current, and temperature will be synchronized on the human-computer interaction device.
[0056] It can also perform charging and discharging simultaneously, and can be charged and discharged cyclically.
[0057] In this embodiment, the charging strategy during the charging phase specifically includes:
[0058] First, determine whether it is suitable to charge based on the monitored cell temperature; if not, it is necessary to cool down or heat up to a suitable temperature.
[0059] If suitable, then determine the current SOC of the battery cell based on the monitored voltage and the SOC-voltage curve.
[0060] If the device is in an overcharge / over-discharge state, it will indicate that it cannot be charged and requires repair.
[0061] If the SOC state is within the preset first or second range, it will enter trickle charging state.
[0062] If the SOC state is within the preset third range, the electrical signal is continuously adjusted for charging according to the pre-defined charging method.
[0063] In this embodiment, the repair work includes, for example, replacing the battery cell and calibrating the SOC / SOH information.
[0064] The preset first or second range can be 0%-3% or 98%-100%; the preset third range is 3%-98%; the charging method includes constant current constant voltage charging, pulse charging and segmented charging, etc., which are not limited here.
[0065] The discharge strategy during the discharge phase specifically includes:
[0066] First, determine whether it is suitable to discharge based on the monitored cell temperature; if not, the temperature needs to be lowered or raised to a suitable level.
[0067] If suitable, then determine the current SOC of the battery cell based on the monitored voltage and the SOC-voltage curve.
[0068] If it is in an overcharge / over-discharge state, it will indicate that it cannot discharge and needs repair;
[0069] If the SOC state is within the preset fourth interval range, the corresponding electrical signal will be output according to the communication result with the load.
[0070] If the battery is in the preset fifth range of SOC, a low battery warning will be displayed and the battery will enter trickle discharge mode.
[0071] Specifically, the temperature is monitored by a temperature sensor in the temperature monitoring module; the voltage is collected by a deployed voltage sensor; the fourth range is 10%-100%, and the fifth range is 0%-10%.
[0072] It should be noted that the values in the above range are only illustrative examples and are not intended to impose restrictions.
[0073] During the battery discharge phase, the electrical energy in the battery is converted into the electrical signal required by the load through the transformer / rectifier / inverter module of the BMS and output through the output interface.
[0074] Furthermore, in implementation, the cooling or heating to a suitable temperature specifically includes:
[0075] When cooling is required, the heat dissipation module adjusts the temperature to a suitable level.
[0076] When heating is required, the internal resistance of the battery cell is used for heating or a heating module is used to adjust to a suitable temperature.
[0077] In another embodiment, based on the above technical solution, the BMS also includes a deployed counter and a SOH (State of Health) detector. When the cell cycle life reaches a set value or the SOH is less than or equal to a set threshold, it indicates that the cell cannot be charged or discharged and needs maintenance. The set threshold is, for example, 70%.
[0078] In this embodiment, the BMS is also provided with a side module, which is used to realize multi-functional combinations, such as lighting, wireless signal transmission and reception, etc.
[0079] The above solution, by employing a sodium battery and supplementing it with a redesigned BMS control, achieves the following beneficial effects:
[0080] 1. High temperature resistance, more resistant to temperature than lithium batteries;
[0081] 2. Sodium batteries have excellent low-temperature performance, and can still be charged and discharged in an environment of -40℃, while effectively maintaining their usable capacity;
[0082] 3. Abundant raw material sources: Compared to the scarcity of lithium ore, sodium reserves are plentiful, and economies of scale can further reduce production and manufacturing costs.
[0083] 4. High cycle life: Compared to polymer lithium batteries, which have only about 500 cycles, sodium batteries can achieve 2,000 cycles or more.
[0084] 5. Environmentally friendly: Compared to lead-acid batteries with lead ion heavy metal pollution and ternary lithium batteries with cobalt, nickel and other heavy metal pollution, sodium batteries are more environmentally friendly.
[0085] 6. It has a higher usable capacity. Compared with the 50%-60% usable capacity of portable energy storage devices using polymer batteries on the market, sodium batteries have a usable capacity of over 90%.
[0086] In the embodiments provided in this application, it should be understood that the described system can be implemented in other ways. For example, the system embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed.
[0087] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional module.
[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.
Claims
1. An energy storage device system, comprising a battery, a BMS, and an input / output interface, characterized in that, It also includes a temperature monitoring module electrically connected to both the battery and the BMS; wherein the battery is a sodium battery, and the BMS has pre-set parameter information corresponding to the battery and is configured as follows: The voltage and current information in the real-time monitoring circuit is combined with the parameter information and the monitored battery temperature to adjust the charging / discharging strategy until the set charging / discharging cutoff conditions are reached.
2. The energy storage device system according to claim 1, characterized in that, It also includes a human-computer interaction component, which is connected to the control module in the BMS, and the control module is further configured to: The battery charging and discharging can be controlled by the human-computer interaction component, or it can operate independently. At the same time, the obtained parameters are continuously displayed on the human-computer interaction component for real-time monitoring.
3. The energy storage device system according to claim 1, characterized in that, The parameter information includes SOC-voltage curve, charge / discharge cutoff voltage and current, charge / discharge rate at different temperatures, cycle life, and SOH; The charging strategy during the charging phase specifically includes: First, determine whether it is suitable to charge based on the monitored cell temperature; if not, it is necessary to cool down or heat up to a suitable temperature. If suitable, then determine the current SOC of the battery cell based on the monitored voltage and the SOC-voltage curve. If the device is in an overcharge / over-discharge state, it will indicate that it cannot be charged and requires repair. If the SOC state is within the preset first or second range, it will enter trickle charging state. If the SOC state is within the preset third range, the electrical signal is continuously adjusted for charging according to the pre-defined charging method.
4. The energy storage device system according to claim 3, characterized in that, The discharge strategy during the discharge phase specifically includes: First, determine whether it is suitable to discharge based on the monitored cell temperature; if not, the temperature needs to be lowered or raised to a suitable level. If suitable, then determine the current SOC of the battery cell based on the monitored voltage and the SOC-voltage curve. If it is in an overcharge / over-discharge state, it will indicate that it cannot discharge and needs repair; If the SOC state is within the preset fourth interval range, the corresponding electrical signal will be output according to the communication result with the load. If the battery is in the preset fifth range of SOC, a low battery warning will be displayed and the battery will enter trickle discharge mode.
5. An energy storage device system according to claim 3 or 4, characterized in that, The cooling or heating to a suitable temperature specifically includes: When cooling is required, the heat dissipation module adjusts the temperature to a suitable level. When heating is required, the internal resistance of the battery cell is used for heating or a heating module is used to adjust to a suitable temperature.
6. The energy storage device system according to claim 5, characterized in that, The BMS also includes a deployed counter and a SOH (State of Health) detector. When the cell cycle life reaches a set value or the SOH is less than or equal to a set threshold, it will indicate that the cell cannot be charged or discharged and needs maintenance.
7. The energy storage device system according to claim 6, characterized in that, The BMS also includes a side module, which is used to implement multi-functional combinations.