Synchronous battery management system and method

Abstract

The present invention provides a synchronous battery management system and method, wherein the management system provided by the present invention includes an information collection unit, a state control unit, a temperature and humidity adjustment unit and a backup battery state adjustment unit, wherein the state control unit sends instructions to the temperature and humidity adjustment unit and the backup battery state adjustment unit according to the state information collected by the information collection unit, so as to adjust the ambient temperature and humidity and state of the backup battery to be consistent with the battery group in operation, thereby ensuring that the external operating environment, charging and discharging voltage and current, etc. of the backup battery are completely consistent with the battery data in operation, so that the failed battery can be replaced at any time. At this time, because the backup battery is completely synchronized with the battery group running in the site, after replacement, its internal state and internal resistance and other parameters are highly consistent, which effectively guarantees the efficacy of the entire battery group.

Description

Technical Field

[0001] The invention belongs to the technical field of substations, and in particular relates to a synchronous battery management system and method. Background Art

[0002] The power supply for power plants and substations is now DC power, and the DC panel is used to supply this DC power. It is mainly composed of power supply line system, power supply dual-way mutual investment system and battery.

[0003] The batteries of the station DC power supply are multiple batteries connected in series. The internal resistance and voltage of the newly installed batteries are almost the same, but even if there is a slight difference, after long-term operation, the one or several batteries with larger internal resistance at the beginning will have a larger difference over time, the internal resistance will continue to increase, the terminal voltage will increase, the internal crystallization will increase, the plate will deform, and the battery will fail. Since the battery group is connected in series, once one of the batteries fails, according to the bucket effect, the entire battery group will also fail.

[0004] The batteries need to be from the same batch and manufactured at the same time in order to operate. Therefore, in the DC power supply operation specifications, old and new batteries, and batteries of different brands cannot be mixed. Therefore, the current battery replacements are all products of the same brand and the same batch. However, even so, since the batteries in use are in a floating charge state, and the spare batteries have been in a storage state, after a period of time, there will inevitably be a big difference between the operating batteries and the spare batteries. At this time, if the spare batteries directly replace the failed batteries, their internal resistance value and the internal structure of the batteries are completely different. They can meet the requirements in a short period of time, but will gradually differ over time, which is very unfavorable to the remaining batteries. Summary of the invention

[0005] In view of this, the present invention aims to solve the problem that when replacing batteries, there is a great difference between the operating battery and the spare battery, which causes the entire battery group to fail easily due to the failure of a certain battery.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The present invention provides a synchronous battery management system, comprising:

[0008] An information collection unit, used to collect status information of the battery pack in operation;

[0009] A state control unit, used to issue temperature and humidity adjustment instructions and state adjustment instructions according to the state information;

[0010] A temperature and humidity adjustment unit, used to adjust the temperature and humidity of the storage room storing the backup battery according to the temperature and humidity adjustment instruction;

[0011] The backup battery state adjustment unit is used to adjust the state of the backup battery according to the state adjustment instruction.

[0012] Furthermore, the information collection unit specifically includes: a signal collector, a wireless transmitter and a wireless receiver;

[0013] The signal collector is used to collect the status information of the running battery pack;

[0014] The wireless transmitter transmits the status information wirelessly to the wireless receiver in a one-way manner;

[0015] The wireless receiver sends the status information to the status control unit.

[0016] Furthermore, the status information of the battery pack in operation specifically includes:

[0017] The ambient temperature and humidity information of the operating battery pack, the charger operating parameter information of the operating battery pack, and the discharge current information of the operating battery pack.

[0018] Furthermore, the state control unit is specifically used for:

[0019] issuing a backup battery charging instruction according to the charger operation parameter information of the operating battery pack;

[0020] issuing a standby battery discharge instruction according to the discharge current information of the operating battery pack;

[0021] The backup battery charging instruction and the backup battery discharging instruction are both state adjustment instructions.

[0022] Furthermore, the standby battery state regulating unit specifically includes: a charger and a discharger;

[0023] The charger is used to charge the backup battery according to the backup battery charging instruction;

[0024] The discharger is used to discharge the backup battery according to the backup battery discharge instruction;

[0025] The charger and discharger are used to adjust the state of the backup battery to be consistent with the operating battery pack through charging and discharging operations.

[0026] In a second aspect, the present invention provides a synchronous battery management method, comprising the following steps:

[0027] Collect status information of the running battery pack;

[0028] The temperature and humidity of the storage room storing the backup batteries and the status of the backup batteries are adjusted according to the status information.

[0029] Furthermore, after collecting the status information of the running battery pack, the following steps are further included:

[0030] The status information of the running battery pack is transmitted wirelessly in one direction.

[0031] Furthermore, the status information of the battery pack in operation specifically includes:

[0032] The ambient temperature and humidity information of the operating battery pack, the charger operating parameter information of the operating battery pack, and the discharge current information of the operating battery pack.

[0033] Furthermore, the status of the backup battery specifically includes:

[0034] The charge state of the backup battery and the discharge state of the backup battery.

[0035] In summary, the present invention provides a synchronous battery management system and method, wherein the management system provided by the present invention includes an information acquisition unit, a state control unit, a temperature and humidity adjustment unit and a backup battery state adjustment unit, wherein the state control unit sends instructions to the temperature and humidity adjustment unit and the backup battery state adjustment unit according to the state information collected by the information acquisition unit, so as to adjust the ambient temperature and humidity and state of the backup battery to be consistent with the battery group in operation, thereby ensuring that the external operating environment of the backup battery, the charging and discharging voltage and current, etc. are completely consistent with the battery data in operation, so as to facilitate the replacement of failed batteries at any time. At this time, because the backup battery is completely synchronized with the battery group running in the site, after replacement, its internal state and internal resistance and other parameters are highly consistent, effectively ensuring the effectiveness of the entire battery group. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 A schematic diagram of the principle of a synchronous battery management system provided by an embodiment of the present invention;

[0038] Figure 2 A system installation diagram of a synchronous battery management system provided by an embodiment of the present invention;

[0039] Figure 3A schematic flow chart of a synchronous battery management method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 creative work are within the scope of protection of the present invention.

[0041] DC power panel: The power operating power supply in power plants and substations now adopts DC power supply, and the DC panel is used to supply this DC power supply. It provides power for control load, power load and DC emergency lighting load, etc. It is the basis of contemporary power system control and protection, and therefore a large number of advanced science and technology are applied. It mainly consists of power supply line system (AC line), power supply dual-way mutual investment system, charger control system, charger, DC distribution system, insulation monitoring system, integrated controller (system monitoring and control system, the brain of DC panel), flash system, communication system and battery.

[0042] The batteries of the station's DC power supply are multiple batteries connected in series. The internal resistance and voltage of the newly installed batteries are almost the same, but even if there is a slight difference, after long-term operation, the one or several batteries with larger internal resistance at the beginning will have a larger gap over time, the internal resistance will continue to increase, the terminal voltage will increase, the internal crystallization will increase, the plate will deform, and cause the battery to fail. Since the battery packs are connected in series, once one of the batteries fails, the entire battery pack will also fail according to the bucket effect.

[0043] In the early DC power supply system, since closing requires a large power, the DC power supply system is divided into closing and control busbars. The closing busbar has a large number of batteries in parallel, while the control busbar is reduced in voltage through a silicon chain. Therefore, if there are individual batteries in the system that fail, they are generally removed. However, the number of batteries is limited. After removing more than 3% of the number of batteries, the voltage value of the battery pack will not be able to meet the use of the back-end electrical components. Although this delays the service life of the entire battery pack, it has certain limitations and is not conducive to the stability of the battery pack. With the continuous change of circuit breaker technology, the power required for closing is decreasing. Therefore, the current new circuit breakers do not need to configure the closing busbar with the DC panel, so it is no longer possible to restore the function of the entire battery pack by reducing the number of batteries.

[0044] The operation of the batteries requires batteries from the same batch and manufactured at the same time. Therefore, in the DC power supply operation specifications, old and new batteries, and batteries of different brands cannot be mixed. Therefore, the current battery replacement is all products of the same brand and the same batch. However, even so, since the batteries in use are in a floating charge state, and the spare batteries have been in a storage state, after a period of time, there will inevitably be a big difference between the operating batteries and the spare batteries. At this time, if the spare battery directly replaces the failed battery, its internal resistance value and the internal structure of the battery are completely different. The requirements can be met in a short time, but as mentioned at the beginning of this paragraph, differences will gradually arise, which is very unfavorable to the remaining batteries.

[0045] Based on this, the present invention provides a synchronous battery management system and method.

[0046] The following is a detailed introduction to an embodiment of a synchronous battery management system of the present invention.

[0047] See also Figure 1 and Figure 2 This embodiment provides a synchronous battery management system, including: an information collection unit, a state control unit, a temperature and humidity adjustment unit, and a backup battery state adjustment unit.

[0048] In this embodiment, the information collection unit is used to collect status information of the operating battery pack.

[0049] like Figure 1 As shown, the temperature and humidity sensor in the left box refers to the temperature and humidity of the battery room of the station DC power supply system. The purpose is to provide a temperature and humidity basis for the backup batteries in the storage room. The temperature in the storage room changes with the temperature and humidity of the battery room, and always keeps synchronized to ensure that the backup batteries and the running batteries operate in the same external environment.

[0050] A normally operating battery is divided into three states, namely floating charge, equalizing charge and discharge. The float charge voltage of a valve-regulated lead-acid battery is 2.25V, and the equalizing charge voltage is 2.35V. The judgment of both can be achieved by the parameters of the charger. If the station AC power supply fails or the battery is undergoing routine maintenance, the battery will discharge. The discharge time and current can be calculated through the battery current parameters and the charger status. For example, when the charger is shut down, the battery must be in a discharging state, and the discharge current can be calculated by collecting the battery current value.

[0051] Specifically, the information collection unit includes a signal collector, a wireless transmitter and a wireless receiver.

[0052] After the signal collector collects the status information of the running battery pack, the wireless transmitter and the wireless receiver form a one-way transmission channel for signal transmission. It ensures that the entire signal is collected by the signal collector and then transmitted to the wireless transmitter. The wireless transmitter is a one-way channel that can only transmit signals to the outside but cannot receive signals. Therefore, it will not affect the existing DC power supply system and will not affect the operation of the existing DC power supply system at all.

[0053] In this embodiment, the state control unit is used to issue temperature and humidity adjustment instructions and state adjustment instructions according to the state information.

[0054] It should be noted that the state control unit uses a controller to complete specific control actions. After receiving the signal, it processes and analyzes the state of the running DC power supply system and the battery, and then controls the ambient temperature and humidity.

[0055] Another factor of the execution is the charge and discharge state of the battery pack, that is, the state of the backup battery is adjusted according to the charge and discharge state of the battery pack in operation.

[0056] In this embodiment, the temperature and humidity adjustment unit is used to adjust the temperature and humidity of the storage room storing the backup battery according to the temperature and humidity adjustment instruction.

[0057] When it is necessary to explain, the temperature and humidity adjustment unit is specifically a storage room air conditioner, which is connected to the controller. The storage room air conditioner is adjusted according to the temperature and humidity of the battery room, so that the operating battery and the backup battery are in exactly the same external environment, eliminating the influence of the external environment on the backup battery.

[0058] In this embodiment, the backup battery state adjustment unit is used to adjust the state of the backup battery according to the state adjustment instruction.

[0059] It should be noted that the standby battery state adjustment unit specifically includes a charger and a discharger. When the operating battery is in an equalization charge or floating charge state, the controller will adjust the voltage of the charger to maintain the same charging voltage as the operating battery and disconnect the discharger; when the operating battery is in a discharge state, the controller will disconnect the battery from the charger and adjust the power of the discharger to keep it consistent with the discharge current of the operating battery.

[0060] Based on the above system settings, the system installation method of the synchronous battery management system is introduced in detail below.

[0061] like Figure 2The left side represents the installation method of each site. Each dispersed site (i.e., the battery group of the DC power system of site A, the battery group of the DC power system of site B, ..., the battery group of the DC power system of site N) is equipped with a set of signal acquisition and wireless transmitters. This device is used for the current operating parameters of each site. The storage room is the center of backup battery management. All batteries of different sites are centrally managed here. The controller determines and controls the corresponding backup battery according to the address data of different sites. Under this management, even after a long period of operation, the operating external environment, charging and discharging voltage and current of the backup battery are completely consistent with the battery data in operation, so the failed battery can be replaced at any time. At this time, the backup battery is completely synchronized with the battery group running in the site. Therefore, after replacement, its internal state and internal resistance and other parameters are highly consistent, which effectively guarantees the effectiveness of the entire battery group.

[0062] The present embodiment provides a synchronous battery management system, wherein the management system provided includes an information collection unit, a state control unit, a temperature and humidity adjustment unit, and a backup battery state adjustment unit, wherein the state control unit issues instructions to the temperature and humidity adjustment unit and the backup battery state adjustment unit according to the state information collected by the information collection unit, so as to adjust the ambient temperature and humidity and state of the backup battery to be consistent with the battery group in operation, thereby ensuring that the external operating environment, charging and discharging voltage and current, etc. of the backup battery are completely consistent with the battery data in operation, so as to facilitate the replacement of failed batteries at any time. At this time, because the backup battery is completely synchronized with the battery group running in the site, after replacement, its internal state and internal resistance and other parameters are highly consistent, effectively ensuring the effectiveness of the entire battery group.

[0063] The above is a detailed introduction to the embodiment of the synchronous battery management system of the present invention. The following is a detailed introduction to the embodiment of the synchronous battery management method of the present invention.

[0064] See also Figure 3 This embodiment provides a synchronous battery management method, including:

[0065] S101: Collecting status information of a running battery pack.

[0066] It should be noted that, after collecting the status information of the operating battery pack, the step also includes performing unidirectional wireless transmission of the status information of the operating battery pack.

[0067] The status information of the operating battery pack specifically includes the ambient temperature and humidity information of the operating battery pack, the charger operating parameter information of the operating battery pack, and the discharge current information of the operating battery pack.

[0068] S102: Adjusting the temperature and humidity of the storage room storing the backup batteries and the status of the backup batteries according to the status information.

[0069] It should be noted that the state of the backup battery specifically includes the charging state of the backup battery and the discharging state of the backup battery.

[0070] The present embodiment provides a synchronous battery management method. The method provided in the present embodiment is to collect data of batteries in normal use. If the battery is in a charging state, then the backup battery is in a charging state. If it is in a discharging state, then the backup battery is also in a discharging state. The discharge current, time and other parameters are completely consistent. In this way, although the backup battery and the battery in normal use are in different spaces, in fact, their operating time, surrounding temperature and humidity environment, charging and discharging state, etc. are completely consistent. In this way, the backup battery will be in the same use state as the battery in use. Since the failure reason of the battery in normal use is related to the battery in series with it, and the backup batteries are all operated independently, they will not be affected by the batteries in series, and their operating trajectories are all normal. Once some of the batteries in series fail, they can be directly replaced with batteries on the management platform, so that the battery can be restored to a better level at this time, which is conducive to maximizing the utilization of the battery.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Synchronous battery management system, characterized in that: include: An information collection unit, used to collect status information of the battery pack in operation; A state control unit, used to issue temperature and humidity adjustment instructions and state adjustment instructions according to the state information; a temperature and humidity adjustment unit, used to adjust the temperature and humidity of the storage chamber storing the backup battery according to the temperature and humidity adjustment instruction; A backup battery state adjustment unit, used for adjusting the state of the backup battery according to the state adjustment instruction; The information collection unit specifically includes: a signal collector, a wireless transmitter and a wireless receiver; The signal collector is used to collect status information of the battery pack in operation; The wireless transmitter transmits the status information to the wireless receiver in a unidirectional wireless manner; The wireless receiver sends the status information to the status control unit; The state information of the battery pack in operation specifically includes: Environmental temperature and humidity information of the operating battery pack, charger operating parameter information of the operating battery pack, and discharge current information of the operating battery pack; The state control unit is specifically used for: issuing a backup battery charging instruction according to the charger operation parameter information of the operating battery pack; issuing a standby battery discharge instruction according to the discharge current information of the operating battery pack; The backup battery charging instruction and the backup battery discharging instruction are both the state adjustment instructions.

2. The synchronous battery management system according to claim 1, characterized in that: The standby battery state adjustment unit specifically includes: a charger and a discharger; The charger is used to charge the backup battery according to the backup battery charging instruction; The discharger is used to discharge the backup battery according to the backup battery discharge instruction; The charger and the discharger are used to adjust the state of the backup battery to be consistent with the operating battery pack through charging and discharging operations.

3. A synchronous battery management method, characterized in that: The steps include: Collect status information of the running battery pack; Adjusting the temperature and humidity of the storage room storing the backup battery and the state of the backup battery according to the state information; The collecting of the status information of the battery pack in operation further includes: Performing one-way wireless transmission of status information of the operating battery pack; The state information of the battery pack in operation specifically includes: The environmental temperature and humidity information of the operating battery pack, the charger operating parameter information of the operating battery pack, and the discharge current information of the operating battery pack.

4. The synchronous battery management method according to claim 3, characterized in that: The state of the backup battery specifically includes: The charge state of the backup battery and the discharge state of the backup battery.

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