A self-adaptive control system for sodium batteries

Abstract

The present invention provides a sodium battery self-adaptive control system, comprising: a controller; a sodium battery pack; a sodium battery protection board; a voltage detection circuit EF; an electric door lock; and further comprising a sodium battery capacity increasing adapter, which is used to output a constant voltage signal after performing step-up / step-down processing on the voltage signal of the sodium battery pack and output the constant voltage signal to the controller, so that the controller can normally control the vehicle to work; by installing the sodium battery capacity increasing adapter on the voltage detection circuit EF, after the voltage signal of the battery pack is subjected to step-up / step-down processing by the sodium battery capacity increasing adapter, it is output to the controller as a fixed-value voltage signal, so that the controller can stably maintain its operation until the voltage of the sodium battery pack reaches the low-voltage protection voltage of the sodium battery, at which time the sodium battery pack stops working and the controller stops working, realizing the complete release of the power of the sodium battery pack and solving the technical problem that the controller does not match the sodium battery when replacing the sodium battery in an existing stock battery-powered vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of battery control, and particularly to a sodium battery self-adaptive control system. Background Art

[0002] As Figure 1 shown, it is a schematic diagram of the electrical connection between the controller 1 of an existing battery-powered vehicle and a battery pack. Among them, the negative output terminal A of the controller 1 is electrically connected to the negative terminal B of the sodium battery pack 2, the positive input terminal D of the controller 1 is electrically connected to the positive output terminal C of the sodium battery pack 2, one end of the voltage detection line EF is electrically connected to the voltage acquisition input terminal F of the controller 1, and the other end is electrically connected to the line between the positive output terminal C and the positive input terminal D. The electric door lock 4 is provided on the voltage detection line EF to control the on / off of the voltage detection line.

[0003] The voltage signal in the battery forms a voltage detection loop through CEFAB. The controller 1 detects in real time whether the voltage value is lower than the low-level protection voltage, so that the controller 1 can control the normal operation or stop of the battery-powered vehicle.

[0004] Sodium has rich reserves and is widely distributed in sodium batteries, which gives sodium batteries significant advantages in raw material supply, making the unit energy raw material cost of sodium batteries relatively low. At the same time, compared with lead-acid batteries or lithium batteries, sodium batteries show better stability in high-temperature and low-temperature environments; in low-temperature environments, the discharge efficiency of sodium batteries is still relatively high, which is particularly important for applications in cold regions; at the same time, the thermal runaway temperature of sodium batteries is relatively high, and the safety performance is better. Therefore, sodium batteries are highly valued by the market.

[0005] However, most of the existing two-wheel or three-wheel electric vehicles in the market use lead-acid batteries or lithium batteries as power sources, and the normal output voltage of the commonly used controller is 48V, and its low-level protection voltage is 42V. When the voltage is lower than 42V, the electric vehicle cannot ride normally; while the low-level protection voltage of sodium batteries is 36.5V. If the lead-acid battery is directly replaced with a sodium battery in the existing two-wheel or three-wheel electric vehicles, since the controller that executes the low-level protection voltage according to the lead-acid standard does not match well with the low-level protection voltage that can be released by the sodium battery, the capacity of the sodium battery cannot be fully released normally, that is, the battery capacity difference between the low-level protection voltage of 42V at which the controller stops working and the low-level protection voltage of 36.5V of the sodium battery itself cannot be used normally, reducing the effective use capacity of the sodium battery. Therefore, how to make the sodium battery adapt to the existing controllers of lead-acid batteries or lithium batteries when replacing the sodium battery pack in the existing battery-powered vehicles is a technical problem to be solved urgently.

[0006] In addition, the low-level protection voltage setting value of the existing controller is higher than the low-level protection voltage of the battery pack, resulting in a certain difference in capacity between the two, which makes the battery pack unable to be fully released, affecting the voltage value released during actual use of the battery. Summary of the Invention

[0007] The purpose of the present invention is to address the shortcomings of the existing technology and provide a sodium battery self-adaptive control system. By installing a sodium battery capacity expansion adapter on the voltage detection circuit EF, the voltage signal of the battery pack is subjected to step-up and step-down processing by the sodium battery capacity expansion adapter, and then output to the controller as a fixed voltage signal, so that the controller can maintain stable operation until the voltage of the sodium battery pack reaches the sodium battery low protection voltage, the sodium battery pack stops working, the controller stops working, and the power of the sodium battery pack is completely released, thereby solving the technical problem of mismatch between the controller and the sodium battery when replacing the sodium battery of the existing electric battery vehicles in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A sodium battery adaptive control system, comprising:

[0010] A controller that controls the starting, running, forward and backward movement, speed, and stopping of the vehicle's motor, as well as the operation of other electronic components on the electric bicycle;

[0011] A sodium battery pack, the sodium battery pack being used to provide electrical energy to the vehicle; the negative output terminal A of the controller being electrically connected to the negative terminal B of the sodium battery pack, and the positive input terminal D of the controller being electrically connected to the positive output terminal C of the sodium battery pack;

[0012] A sodium battery protection board, which is provided in the sodium battery pack and controls the capacity of the sodium battery pack to be no lower than the low protection voltage of the sodium battery pack;

[0013] A voltage detection circuit EF, one end of which is electrically connected to the voltage acquisition input terminal F of the controller, and the other end of which is electrically connected to the circuit between the positive output terminal C and the positive input terminal D;

[0014] An electric door lock is provided on a voltage detection circuit and is used to control the on and off of the voltage detection circuit;

[0015] It is characterized in that it also includes a sodium battery capacity expansion adapter, which is used to output the voltage signal of the sodium battery pack as a constant voltage signal after voltage increase / decrease processing and output it to the controller, so that the controller can control the vehicle operation normally.

[0016] As an improvement, the negative input terminal K of the sodium battery capacity increasing adapter is electrically connected to the negative terminal B of the sodium battery pack; the positive input terminal I of the sodium battery capacity increasing adapter is electrically connected to the J contact on the voltage detection circuit EF, and the positive output terminal H of the sodium battery capacity increasing adapter is electrically connected to the G contact on the voltage detection circuit EF.

[0017] As an improvement, the J contact and the G contact are located between the voltage acquisition input terminal F and the electric door lock.

[0018] As an improvement, the J contact and the G contact are respectively located on both sides of the electric door lock.

[0019] As an improvement, the J contact and the G contact are located between the electric door lock and the positive output terminal C.

[0020] As an improvement, the input voltage of the positive input terminal I is 5V - 95V.

[0021] As an improvement, the output voltage of the positive output terminal H is 12V - 90V.

[0022] As an improvement, the output current of the positive output terminal H is less than 0.1A.

[0023] As an improvement, the sodium battery capacity increasing adapter is installed inside the sodium battery pack.

[0024] As an improvement, the sodium battery capacity increasing adapter is installed outside the sodium battery pack.

[0025] As an improvement, the sodium battery capacity increasing adapter includes: a voltage input interface, a buck-boost control system, and a voltage output interface.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) By installing the sodium battery capacity increasing adapter on the voltage detection circuit EF, the voltage signal of the battery pack is processed by the sodium battery capacity increasing adapter for buck-boost, and then output to the value controller as a fixed-value voltage signal, so that the controller can stably maintain its operation. Until the voltage of the sodium battery pack reaches the low-voltage protection voltage of the sodium battery, the sodium battery pack stops working and the controller stops working, realizing the complete release of the power of the sodium battery pack.

[0028] (2) By setting the input voltage of the sodium battery capacity increasing adapter in the range of 5V - 95V, it meets the battery voltage range of existing electric vehicles on the market, improving the versatility of the sodium battery capacity increasing adapter.

[0029] (3) By the adjustable setting of the voltage at the output terminal H of the sodium battery capacity increasing adapter, it can quickly match the battery packs of different vehicle models, facilitating the replacement operation.

[0030] (4)The output current of the positive electrode output terminal H of the present invention is designed to be less than 0.1 A, basically realizing that the capacity-increasing adapter does not affect the normal use of the battery capacity.

[0031] (5)The present invention realizes that after the electric door lock is turned on, the current passes through the sodium battery capacity-increasing adapter by connecting the wiring terminal of the sodium battery capacity-increasing adapter between the voltage acquisition input terminal F and the electric door lock, reducing the power consumption of the battery pack when the electric door lock is turned off.

[0032] (6)The present invention improves the integration of the sodium battery pack in the production process by integrating the capacity-increasing adapter inside the battery pack.

[0033] (7)When replacing the sodium battery pack on-site, the present invention adds a capacity-increasing adapter to quickly adapt to different controllers, with low cost, fast replacement, and convenience.

[0034] In summary, the present invention has the advantages of adapting to battery packs with different voltages, being able to fully release the power of the battery pack, being convenient for installation and replacement, and having low cost. Description of the Drawings

[0035] Figure 1 Schematic diagram of the connection between the prior art controller and the battery;

[0036] Figure 2 Schematic diagram of the first embodiment of the present invention;

[0037] Figure 3 Schematic diagram of the second embodiment of the present invention;

[0038] Figure 4 Schematic diagram of the third embodiment of the present invention;

[0039] Figure 5 Schematic diagram of the fourth embodiment of the present invention;

[0040] Figure 6 Schematic diagram of the buck-boost control system of the present invention. Detailed Embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0043] Embodiment 1

[0044] As Figure 2 shown, this embodiment provides a sodium battery self-adaptive control system, including:

[0045] A controller 1, which controls the starting, running, advancing and retreating, speed, stopping of the vehicle's motor and the operation of other electronic devices on the electric bicycle;

[0046] A sodium battery pack 2, which is used to provide electrical energy for the vehicle; the negative output terminal A of the controller 1 is electrically connected to the negative terminal B of the sodium battery pack 2, and the positive input terminal D of the controller 1 is electrically connected to the positive output terminal C of the sodium battery pack 2;

[0047] A sodium battery protection board 3, which is arranged in the sodium battery pack 2 to control the capacity of the sodium battery pack 2 not to be lower than the low-voltage protection voltage of the sodium battery;

[0048] A voltage detection circuit EF, one end of which is electrically connected to the voltage acquisition input terminal F of the controller 1, and the other end is electrically connected to the circuit between the positive output terminal C and the positive input terminal D;

[0049] An electric door lock 4, which is arranged on the voltage detection circuit and is used to control the on / off of the voltage detection circuit;

[0050] It further includes a sodium battery capacity increasing adapter 5, which is used to output a constant voltage signal after processing the voltage signal of the sodium battery pack 2 through step-up / step-down and output it to the controller 1 to enable the controller 1 to normally control the operation of the vehicle.

[0051] It should be noted that by closing the electric door lock 4, the sodium battery pack 2 is electrically connected to the controller 1, and the controller 1 can control the starting, running, forward and backward movement, speed, stop of the vehicle motor, and the operation of other electronic devices on the electric bicycle; among them, the voltage signal of the sodium battery pack 2 passes through the sodium battery capacity increasing adapter 5, and after being stepped up / down by the sodium battery capacity increasing adapter 5, the voltage output by the sodium battery capacity increasing adapter 5 is always a set voltage value, such as 48V, 60V, 72V, etc. The stable output voltage signal is sent to the controller 1, so that the input voltage signal received by the controller 1 is a constant value, and a normal working signal is continuously sent until the voltage of the sodium battery pack 2 is released to the low voltage protection value, triggering the sodium battery protection board 3, and the battery pack stops discharging externally, completing full discharge, thereby increasing the driving range of the vehicle.

[0052] Preferably, the negative input terminal K of the sodium battery capacity increasing adapter 5 is electrically connected to the negative terminal B of the sodium battery pack 2; the positive input terminal I of the sodium battery capacity increasing adapter 5 is electrically connected to the J contact on the voltage detection line EF, and the positive output terminal H of the sodium battery capacity increasing adapter 5 is electrically connected to the G contact on the voltage detection line EF.

[0053] It should be noted that the J contact is set far away from the voltage acquisition input terminal F, and the G contact is set close to the voltage acquisition input terminal F.

[0054] Furthermore, the J contact and the G contact are located between the voltage acquisition input terminal F and the electric door lock 4.

[0055] It should be noted that through the above setting method, only after the electric door lock 4 is turned on, a current will be generated between the line IJ and the line HG, realizing that no current passes through the sodium battery capacity increasing adapter after the electric door lock 4 is turned off, reducing the battery loss when parking.

[0056] Preferably, the input voltage of the positive input terminal I is 5V - 95V.

[0057] It should be noted that the input voltage signal of the sodium battery capacity increasing adapter 5 of the present application can adapt to the battery voltages of all two-wheel and three-wheel battery-powered vehicles in the existing stock market, with a wide range of applications.

[0058] Preferably, the output voltage of the positive output terminal H is 12V - 90V.

[0059] It should be noted that the output end of the sodium battery capacity increasing adapter 5 of the present application preferably adopts a method of outputting three groups of fixed-value output voltage signals, preferably the voltage output signal values of 48V, 60V, and 72V, which are commonly used for battery cars. By adjusting different wiring terminals, the output of three groups of different voltage value signals can be realized, which is suitable for the installation of different battery car batteries. At the same time, other output voltage values can also be selected according to different battery car batteries, not limited to the above three voltage values.

[0060] Preferably, the output current of the positive output terminal H is less than 0.1A.

[0061] It should be noted that through the wiring method of this embodiment, during actual use, the current of the positive output terminal H is only 0.03A, and its power consumption during use can be basically ignored.

[0062] Preferably, the sodium battery capacity increasing adapter 5 is installed in the sodium battery pack 2.

[0063] It should be noted that by installing the sodium battery capacity increasing adapter 5 inside the battery pack, during the production process of the original sodium battery pack 2, the sodium battery capacity increasing adapter 5 can be placed inside the battery pack, improving the integration of the battery pack.

[0064] In this embodiment, the voltage of a conventional single battery is 12V, and the voltage of multiple series-connected batteries can be 24V, 36V, 48V, 60V, 72V, 84V, etc. Taking the 48V battery as an example, its low-voltage protection voltage is 36.5V. By setting the sodium battery capacity increasing adapter 5, the differential capacity between the controller 1 with a traditional low-voltage protection voltage of 42V and the minimum protection voltage of 36.5V of the sodium battery can be completely released, increasing the use time of the electric vehicle by about 15 minutes, enabling the effective capacity of the battery to be fully released, without affecting the battery life and increasing the driving mileage of the electric vehicle.

[0065] At the same time, the user does not need to replace a new controller 1 additionally, solving the problems that not only there are mismatching technologies when replacing the controller 1, but also there will be a problem of mismatching of the controller 1 when replacing the battery next time. In addition, the cost of the controller 1 is relatively high, and ordinary users will not choose to replace the controller 1 every time.

[0066] The sodium battery capacity increasing adapter 5 of the present invention is inexpensive and not limited to the type of battery, and can satisfy the stable output of voltage signals to the controller 1 until the low-voltage protection of the battery pack is triggered and the sodium battery pack stops supplying power.

[0067] Embodiment 2

[0068] Such as Figure 2As shown, the components that are the same as or corresponding to those in the first embodiment are denoted by the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The difference between the second embodiment and the first embodiment is as follows:

[0069] In this embodiment, the J contact and the G contact are respectively located on both sides of the electric door lock 4.

[0070] It should be noted that through this setting method, when using the remote control key to control the vehicle, the remote control on / off controller 1 can be used to realize the opening and closing of the vehicle. At the same time, the sodium battery capacity increasing adapter 5 can also work normally without being affected by the electric door lock 4.

[0071] In addition, the sodium battery capacity increasing adapter 5 can also be integrated with the controller 1, so that the voltage input to the controller is a stable constant voltage from the source, improving the compactness of the device.

[0072] Specifically, the J contact of the sodium battery capacity increasing adapter 5 is connected to the D contact, which is the positive terminal connection point where the battery pack inputs to the controller 1. Its G contact is connected to the F contact, and the L contact is connected to the A contact, shortening the circuit and improving the compactness of the device. At the same time, the integrated controller 1 can use the remote control to start the vehicle. In some cases where it is not convenient to insert the key to start the vehicle, the vehicle can be quickly started using the remote control.

[0073] Embodiment Three

[0074] As Figure 3 shown, the components that are the same as or corresponding to those in the first embodiment are denoted by the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The difference between the third embodiment and the first embodiment is as follows:

[0075] In this embodiment, the J contact and the G contact are located between the electric door lock 4 and the positive output terminal C.

[0076] It should be noted that through the above setting method, the opening and closing of the electric door lock 4 controls the on / off of the voltage detection circuit EF, and cooperates with the step-up and step-down of the sodium battery capacity increasing device to output a stable voltage signal to the controller 1, effectively releasing the capacity of the sodium battery pack 2 and increasing the usage duration of the battery-powered vehicle.

[0077] Embodiment Four

[0078] As Figure 5 shown, the components that are the same as or corresponding to those in the first embodiment are denoted by the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The difference between the fourth embodiment and the first embodiment is as follows:

[0079] In this embodiment, the sodium battery capacity increasing adapter 5 is installed outside the sodium battery pack 2.

[0080] It should be noted that when replacing the lithium-ion or lead-acid battery with a sodium battery pack 2 in an existing stock electric vehicle, by externally adding a sodium battery capacity increasing adapter 5, the controller 1 of the battery vehicle can be quickly adapted, solving the technical problem of the mismatch between the low-voltage protection voltage of the controller 1 and the battery pack in the prior art.

[0081] When replacing the sodium battery pack 2, only need to disconnect the line between the ignition switch 4 and the voltage acquisition input terminal F, and respectively connect the positive output terminal H and the positive input terminal I of the sodium battery capacity increasing adapter 5, and connect the negative input terminal K to the negative pole of the battery pack, to achieve the quick installation of the sodium battery capacity increasing adapter 5.

[0082] Embodiment Five

[0083] As Figure 6 shown, the same or corresponding components as those in Embodiment One adopt the corresponding reference numerals in Embodiment One. For the sake of simplicity, only the differences from Embodiment One will be described below. The difference between this Embodiment Five and Embodiment One lies in:

[0084] In this embodiment, the sodium battery capacity increasing adapter 5 includes: voltage input interfaces K, I, a buck-boost control system, and a voltage output interface H.

[0085] The buck-boost control system includes: a switching tube Q1, a storage inductor L1, a diode D1, an output filter capacitor C1, and a load resistor R1.

[0086] It should be noted that the buck-boost control system further includes a control chip for controlling the operation of the system.

[0087] When the switching tube is turned on, the input current flows directly to the ground through the inductor, and the right-end output is mainly maintained by the capacitor discharge;

[0088] When the switching tube is turned off, the inductor current flows from the ground to the load and the capacitor, and returns to the inductor after flowing through the diode.

[0089] By using the duty cycle of the PWM wave of the control switching tube, the output voltage is boosted or bucked.

[0090] When the duty cycle is greater than 1 / 2, it boosts; when the duty cycle is less than 1 / 2, it bucks.

[0091] It should be noted that this application uses a conventional buck-boost circuit to realize the boosting and bucking of the input voltage, and adjusts the output voltage through different load resistors to adapt to different output voltage vehicle models, improving the applicable range of the sodium battery capacity increasing adapter.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sodium battery self - adapting control system, comprising: A controller (1), which controls the start, operation, forward and reverse movement, speed, stop of the vehicle's motor, and the operation of other electronic devices on the electric bicycle; A sodium battery pack (2), which is used to provide electrical energy for the vehicle; the negative output terminal A of the controller (1) is electrically connected to the negative terminal B of the sodium battery pack (2), and the positive input terminal D of the controller (1) is electrically connected to the positive output terminal C of the sodium battery pack (2); A sodium battery protection board (3), which is arranged inside the sodium battery pack (2) to control the capacity of the sodium battery pack (2) not to be lower than the low - voltage protection voltage of the sodium battery pack (2); A voltage detection circuit EF, one end of which is electrically connected to the voltage acquisition input terminal F of the controller (1), and the other end is electrically connected to the circuit between the positive output terminal C and the positive input terminal D; An electric door lock (4), which is arranged on the voltage detection circuit and is used to control the on - off of the voltage detection circuit; Characterized in that it further comprises a sodium battery capacity - increasing adapter (5), which is used to process the voltage signal of the sodium battery pack (2) through step - up / step - down processing and output it as a constant voltage signal and output it to the controller (1) to enable the controller (1) to normally control the vehicle operation; The negative input terminal K of the sodium battery capacity - increasing adapter (5) is electrically connected to the negative terminal B of the sodium battery pack (2); the positive input terminal I of the sodium battery capacity - increasing adapter (5) is electrically connected to the J contact on the voltage detection circuit EF, and the positive output terminal H of the sodium battery capacity - increasing adapter (5) is electrically connected to the G contact on the voltage detection circuit EF.

2. The self-adaptive control system of a sodium battery according to claim 1, characterized in that The J contact and the G contact are located between the voltage acquisition input terminal F and the electric door lock (4).

3. The self - adapting control system for a sodium battery according to claim 1, characterized in that, The J contact and the G contact are respectively located on both sides of the electric door lock (4).

4. The self - adaptive control system of a sodium battery according to claim 1, characterized in that, The J contact and the G contact are located between the electric door lock (4) and the positive output terminal C.

5. A self-adaptive control system for a sodium battery according to any one of claims 1-4, characterized in that, The input voltage of the positive input terminal I is 5V - 100V.

6. A sodium battery self-adaptive control system according to any one of claims 1-4, characterized in that, The output voltage of the positive output terminal H is 12V - 96V.

7. A self - adapting control system for a sodium battery according to any one of claims 1 - 4, characterized in that, The output current of the positive output terminal H is less than 0.1A.

8. A sodium battery self-adaptive control system according to any one of claims 1-4, characterized in that, The sodium battery capacity - increasing adapter (5) is installed inside the sodium battery pack (2), outside the sodium battery pack (2), or integrated with the controller (1).

9. A self-adaptive control system for a sodium battery according to any one of claims 1-4, characterized in that, The sodium battery capacity - increasing adapter (5) includes: a voltage input interface, a step - up / step - down control system, and a voltage output interface.

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