Sodium battery module structure and long-endurance electric two-wheeled vehicle

Abstract

The utility model provides a sodium battery module structure and a long-endurance electric two-wheeled vehicle, and relates to the technical field of battery structures of electric two-wheeled vehicles, the sodium battery module structure comprises a shell, a plurality of sodium battery cells and a BMS protection plate, the number of the sodium battery cells is set, and all the sodium battery cells are connected in series in the shell; the BMS protection plate is arranged in the shell, all the sodium battery cells are connected with the BMS protection plate, and the shell is provided with a positive electrode wiring part and a negative electrode wiring part which are connected with the BMS protection plate; when the sodium battery module structure is applied, a user can select a corresponding number of sodium battery module structures to be connected in series according to actual requirements, so that sodium batteries with different voltages are formed, the sodium battery module structure is suitable for various vehicle types and high in universality, the safety performance of the batteries can be effectively improved by monitoring the working states of the batteries in real time in the using process, and the service life of the batteries is prolonged. And the use safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery structures for electric two-wheeled vehicles, and in particular to a sodium battery module structure and a long-range electric two-wheeled vehicle. Background Art

[0002] Traditional electric two-wheelers mainly use lead-acid and lithium battery technologies. Although lead-acid batteries have lower costs, they have a series of disadvantages such as low energy density, heavy weight, short cycle life, and slow charging. Lithium batteries have the advantages of high energy density, light weight, long cycle life, and fast charging, and can provide higher endurance and performance, but their low temperature performance and over-discharge performance are poor, their safety is low, and their manufacturing costs are relatively high.

[0003] The emergence of sodium batteries not only takes into account the advantages of lithium batteries, but also has lower costs than lithium batteries, can be deeply discharged in extremely cold conditions, and also avoids the shortcomings of lead-acid batteries, and gradually becomes the best choice for electric vehicles. However, the new whole pack sodium ion batteries on the market are relatively single in model, such as 48V20Ah, 60V20Ah, 72V20Ah. Such whole pack sodium batteries cannot be connected in series and can only be adapted to electric vehicles of the same voltage level, but cannot be adapted to vehicles of different voltages, and have poor versatility. Utility Model Content

[0004] The purpose of the utility model is to provide a sodium battery module structure and a long-range electric two-wheeled vehicle to solve the technical problem that the existing whole package sodium ion batteries in the prior art have poor versatility due to the single model and the inability to be connected in series; the preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects; see the following description for details.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a sodium battery module structure, comprising a shell, a sodium battery cell and a BMS (battery management system) protection board, wherein: the number of the sodium battery cells is set to be multiple, and all the sodium battery cells are arranged in series in the shell; the BMS protection board is arranged in the shell, and all the sodium battery cells are connected to the BMS protection board, and a positive electrode wiring part and a negative electrode wiring part are arranged on the shell and connected to the BMS protection board.

[0007] Preferably, the BMS protection board is arranged above the sodium battery cell.

[0008] Preferably, the positive electrode connection part is provided as a positive electrode connection post, and the negative electrode connection part is provided as a negative electrode connection post; the positive electrode connection post and the negative electrode connection post are both provided on the upper surface of the shell.

[0009] Preferably, an insulating plate is vertically arranged in the shell between two adjacent sodium battery cells.

[0010] Preferably, insulating glue is poured between the sodium battery cell and the inner wall of the shell.

[0011] Preferably, an exhaust layer is provided at the top of the sodium battery cell in the shell; the exhaust layer is located below the BMS protection plate.

[0012] Preferably, the BMS protection board is connected with a one-line interface; the one-line interface is located outside the shell.

[0013] Preferably, the sodium battery cell comprises an aluminum-plastic packaging film, a cell positive electrode and a cell negative electrode, wherein: the cell positive electrode and the cell negative electrode are connected and arranged on the aluminum-plastic packaging film; and an electrolyte is arranged in the aluminum-plastic packaging film.

[0014] Preferably, the sodium battery cell is a 3V battery cell; and the number of the sodium battery cells is set to four.

[0015] The utility model provides a long-range electric two-wheeled vehicle, comprising any one of the sodium battery module structures described above.

[0016] The utility model provides a sodium battery module structure and a long-range two-wheeled electric vehicle having at least the following

[0017] Beneficial effects:

[0018] The sodium battery module structure includes a shell, a sodium battery cell and a BMS protection board. The shell is used to accommodate and install the sodium battery cell and the BMS protection board. The sodium battery cell is the power storage part of the sodium battery module structure, and the BMS protection board is used for battery management.

[0019] The number of the sodium battery cells is set to be multiple, all of the sodium battery cells are arranged in series in the shell, the BMS protection board is arranged in the shell, all of the sodium battery cells are connected to the BMS protection board, and the shell is provided with a positive electrode connection part and a negative electrode connection part connected to the BMS protection board. In actual use, the user selects a corresponding number of sodium battery module structures to be connected in series according to actual needs, so as to form a sodium battery of corresponding model, which can realize the combination of sodium batteries of different voltages, and the BMS protection board can read the battery information in real time during use, and judge the battery performance through the read information, so as to effectively ensure the battery safety.

[0020] When the utility model is used, the user can select a corresponding number of sodium battery module structures for series connection according to actual needs, thereby forming sodium batteries with different voltages, which are suitable for a variety of vehicle models and have strong versatility. In addition, during use, the battery working status can be monitored in real time, which can effectively improve the battery safety performance and ensure safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the sodium battery module of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the sodium battery cell of the utility model;

[0024] Figure 3 This is the principle diagram of the BMS protection board of the utility model.

[0025] Reference numerals

[0026] 1. Shell; 2. Sodium battery cell; 21. Aluminum-plastic packaging film; 22. Electrolyte; 23. Positive electrode ear; 24. Negative electrode ear; 25. Positive electrode; 26. Negative electrode; 27. Diaphragm; 3. BMS protection board; 4. Positive electrode connection part; 5. Negative electrode connection part; 6. Insulating board; 7. Insulating glue; 8. Exhaust layer; 9. One-wire interface. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0028] Embodiment 1:

[0029] The utility model provides a sodium battery module structure, referring to Figure 1 As shown, the sodium battery module structure includes a shell 1, a sodium battery cell 2 and a BMS protection board 3.

[0030] The number of sodium battery cells 2 is set to be multiple, all sodium battery cells 2 are arranged in series in the shell 1, the BMS protection board 3 is arranged in the shell 1, all sodium battery cells 2 are connected to the BMS protection board 3, and a positive electrode wiring part 4 and a negative electrode wiring part 5 are arranged on the shell 1 connected to the BMS protection board 3. The BMS protection board 3 can read battery information, such as BMS code, battery rated voltage, rated capacity, current current, current voltage, current SOC (state of charge), number of cycles, battery health, battery temperature, battery status, etc., and can judge the performance of the current battery through the battery information obtained as mentioned above.

[0031] In actual application, the user selects a corresponding number of sodium battery module structures according to actual needs, and connects them in series to obtain a sodium battery with a corresponding voltage.

[0032] During the operation of the battery, the BMS protection board 3 monitors the battery status in real time.

[0033] The user of the utility model can combine and match a variety of sodium batteries with different voltages according to actual needs, which are suitable for different vehicle models and have strong versatility. During use, the battery status can be monitored in real time, thereby significantly improving the safety performance of the battery.

[0034] Embodiment 2:

[0035] Example 2 is based on Example 1:

[0036] like Figure 1 As shown, the BMS protection board 3 is arranged above the sodium battery cell 2 .

[0037] The BMS protection board 3 is an electronic component, and its schematic diagram is as follows Figure 3 As shown, it is used to monitor and manage the charging and discharging process of the sodium battery to ensure the safety, performance and life of the battery. The principle and function of the BMS protection board 3 are as follows:

[0038] Battery balancing: The BMS protection board 3 can monitor the voltage of each sodium battery cell 2 and implement balancing during the charging or discharging process, which helps prevent some sodium battery cells 2 from being over-discharged or over-charged, thereby extending the life of the entire battery module.

[0039] Overcharge protection: The BMS protection board 3 can monitor the total voltage of the battery module to prevent the battery module from being overcharged due to charging beyond the safe level, helping to prevent damage caused by overcharging and ensure safe operation of the battery.

[0040] Over-discharge protection: The BMS protection board 3 can monitor the total voltage of the battery module to prevent the battery module from over-discharging during discharge, thereby avoiding battery damage caused by over-discharging.

[0041] Temperature monitoring: The BMS protection board 3 can also monitor the temperature of the battery module. Under high or low temperature conditions, the BMS protection board 3 can take measures, such as cutting off the current, to protect the battery from temperature-induced damage.

[0042] Short circuit protection: The BMS protection board 3 can detect short circuits in the battery module and cut off the current in time to prevent overcurrent caused by short circuits and ensure the safe operation of the battery module.

[0043] Communication and monitoring: The BMS protection board 3 has the ability to communicate with external systems and can provide real-time status information of the battery for monitoring the performance, health status and usage of the battery.

[0044] Protection board self-monitoring: The BMS protection board 3 also includes monitoring of its own status to ensure the normal operation of the BMS protection board 3 itself.

[0045] The BMS protection board 3 can also be used by users to obtain battery information and battery status.

[0046] As an optional embodiment, the positive electrode connection part 4 is set as a positive electrode terminal, and the negative electrode connection part 5 is set as a negative electrode terminal, and the positive electrode terminal and the negative electrode terminal are both arranged on the upper surface of the shell.

[0047] The connection part adopts terminal posts to facilitate wiring.

[0048] As an optional embodiment, an insulating plate 6 is vertically arranged between two adjacent sodium battery cells 2 in the housing 1 , and the insulating plate 6 can effectively isolate the adjacent sodium battery cells 2 .

[0049] As an optional implementation, insulating glue 7 is poured between the sodium battery cell 2 and the inner wall of the shell 1 .

[0050] The insulation performance is further improved, the sodium battery cell 2 is prevented from shaking, and the cell protection effect is remarkable.

[0051] As an optional embodiment, a degassing layer 8 is provided on the top of the sodium battery cell 2 in the housing 1 , and the degassing layer 8 is located below the BMS protection plate 3 , and the degassing layer 8 is used to release the internal gas of the battery module.

[0052] As an optional implementation, the BMS protection board 3 is connected with a one-line interface 9, which is located outside the shell 1. The one-line interface 9 can be connected to the central control, instrument and other vehicle communication parts through a communication line.

[0053] As an optional implementation, Figure 2 As shown, the sodium battery cell 2 includes an aluminum-plastic packaging film 21, a cell positive electrode and a cell negative electrode.

[0054] The positive electrode of the battery cell includes a positive electrode ear 23 and a positive electrode 25 connected to the positive electrode ear 23. The positive electrode ear 23 is arranged on the aluminum-plastic packaging film 21. The positive electrode 25 is composed of a sodium compound and is arranged inside the aluminum-plastic packaging film 21. x NiO2, NaFeO2, NaCrO2.

[0055] The negative electrode of the battery cell includes a negative electrode ear 24 and a negative electrode 26 connected to the negative electrode ear 24. The negative electrode ear 24 is arranged on the aluminum-plastic packaging film 21. The negative electrode 26 is made of silkworm pupa carbon material and is arranged inside the aluminum-plastic packaging film 21. The negative electrode 26 includes hard carbon, Sn, Pb, and Na2Ti3O2.

[0056] An electrolyte 22 is disposed in the aluminum-plastic packaging film 21 , and the electrolyte 22 includes electrolyte NaPF6, solvent carbonate, and additive FEC.

[0057] A separator 27 for isolating the positive electrode 25 and the negative electrode 26 is also arranged in the aluminum-plastic packaging film 21 .

[0058] As an optional implementation, the sodium battery cell 2 is a 3V cell, the rated voltage of which is 3V, the operating voltage range is 1.5V to 3.9V, and the number of the sodium battery cells 2 is set to four.

[0059] Optionally, the shell 1 has a length of 182 mm, a width of 77 mm, and a height of 150 mm, and the sodium battery cell 2 has a height of 125 mm and a diameter of 40 mm.

[0060] When in use, by connecting different numbers of battery modules in series, batteries of different capacities can be assembled.

[0061] For example, if four battery modules are connected in series, a 48V sodium battery can be formed, which is used in the battery assembly of a 48V electric vehicle. If five battery modules are connected in series, a 60V sodium battery can be formed, which is used in the battery assembly of a 60V electric vehicle. If six battery modules are connected in series, a 72V sodium battery can be formed, which is used in the battery assembly of a 72V electric vehicle.

[0062] Example 3

[0063] Example 3 is based on Example 2:

[0064] The utility model provides an electric two-wheeled vehicle with a long cruising range, and the electric two-wheeled vehicle with a long cruising range comprises the sodium battery module structure.

[0065] The long-range electric two-wheeled vehicle adopting the sodium battery module structure can achieve long battery range, high energy density, long life and light weight while improving the battery safety performance. It is not only flexible in structure, easy to combine and match, and highly versatile, but also safe and reliable to use.

[0066] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sodium battery module structure, characterized in that: It includes a housing, a sodium battery cell and a BMS protection board, wherein: The number of the sodium battery cells is set to be multiple, and all the sodium battery cells are arranged in series in the housing; The BMS protection board is arranged in the shell, all the sodium battery cells are connected to the BMS protection board, and a positive electrode connection part and a negative electrode connection part are arranged on the shell and connected to the BMS protection board.

2. The sodium battery module structure according to claim 1, characterized in that: The BMS protection board is arranged above the sodium battery cell.

3. The sodium battery module structure according to claim 1, characterized in that: The positive electrode connection part is configured as a positive electrode terminal, and the negative electrode connection part is configured as a negative electrode terminal; The positive electrode terminal and the negative electrode terminal are both arranged on the upper surface of the shell.

4. The sodium battery module structure according to claim 1, characterized in that: An insulating plate is vertically arranged in the shell between two adjacent sodium battery cells.

5. The sodium battery module structure according to claim 1, characterized in that: Insulating glue is poured between the sodium battery cell and the inner wall of the shell.

6. The sodium battery module structure according to claim 1, characterized in that: An exhaust layer is provided in the shell at the top of the sodium battery cell; The exhaust layer is located below the BMS protection plate.

7. The sodium battery module structure according to claim 1, characterized in that: The BMS protection board is connected with a one-line interface; The one-line interface is located outside the shell.

8. The sodium battery module structure according to claim 1, characterized in that: The sodium battery cell comprises an aluminum-plastic packaging film, a cell positive electrode and a cell negative electrode, wherein: The positive electrode of the battery cell and the negative electrode of the battery cell are connected and arranged on the aluminum-plastic packaging film; The aluminum-plastic packaging film is provided with electrolyte.

9. The sodium battery module structure according to claim 1, characterized in that: The sodium battery cell adopts a 3V cell; The number of the sodium battery cells is set to four.

10. A long-range electric two-wheeled vehicle, characterized in that: A sodium battery module structure comprising any one of claims 1 to 9.

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