Sodium ion battery for compatible hybrid vehicle

Abstract

The utility model relates to the field of electricity, and provides a compatible sodium ion battery for a hybrid electric vehicle, which comprises a plurality of battery packs, a balance circuit board and an accommodating shell, each battery pack is formed by electrically connecting one battery unit or a plurality of battery units; the balance circuit board is electrically connected with the battery pack; the opening of the containing shell and the balance circuit board are arranged in a covering mode, the battery pack is arranged in the containing shell, and an identification structure is arranged on the battery pack and / or the containing shell. According to the design of the battery pack, the number of existing battery packs needing to be replaced can be set, so that a compatible working voltage range is formed when the sodium ion battery for the compatible hybrid vehicle is used for replacing an existing battery, the sodium ion battery for the compatible hybrid vehicle is suitable for being used by an existing vehicle, compatible use of working voltage is formed, and the basis of battery replacement is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of electricity, and in particular to a sodium ion battery for a compatible hybrid vehicle. Background Art

[0002] The general definition of a pure electric vehicle can be understood as: the car obtains electrical energy from its own energy storage device to drive the motor. It is required to meet the road traffic safety regulations of the country where it is located and be qualified to drive on regular roads.

[0003] As batteries and battery technology advance, HEVs (i.e., batteries) benefit from new forms of energy, expanding or introducing new advantages over conventional vehicles. For example, it is often desirable to increase the total driving range (i.e., total driving distance) of electric vehicles, and conventional nickel metal hydride batteries (i.e., nickel-metal hydride batteries) have been widely used in HEV vehicles, such as the Toyota Prius, Toyota Camry Hybrid, Honda Hybrid, Hyundai Hybrid, Nissan Hybrid, and GM Hybrid. These HEV batteries enhance the power of HEVs and achieve fuel savings.

[0004] In order to improve the performance of batteries, one of the technological advances in batteries is the introduction and use of sodium-based batteries in HEVs and electric vehicles. Compared with traditional nickel metal hydride batteries (i.e., nickel-hydrogen batteries), sodium-ion batteries generally have higher power density, higher power output, and better charging efficiency. Specifically, suitable for a very wide range of temperature environments, sodium-ion batteries can provide power to the load in the range of -30°C to 70°C. In addition, sodium-ion batteries can be discharged to 0V without causing any damage to the battery. This is an advantage over other batteries. Usually, after other types of batteries are over-discharged, the performance of the battery itself will be irreversibly damaged, which makes them more suitable for use in HEVs and electric vehicles. Sodium-ion batteries are also able to store the same amount of electricity in a smaller space than nickel-hydrogen batteries, which makes the use of sodium-based batteries more applicable in many types.

[0005] However, there are replacement issues between existing nickel-metal hydride batteries and sodium-ion batteries, such as structural design and compatibility design, how to ensure that the vehicle does not fail or damage the power of the electric vehicle after replacement. By designing a compatible sodium-ion battery for hybrid vehicles, this gap can be filled. Utility Model Content

[0006] The utility model aims to provide a compatible sodium ion battery for hybrid vehicles, aiming to improve the problem of how to ensure vehicle compatibility when the existing nickel-hydrogen battery is replaced by a sodium ion battery.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a sodium ion battery for a compatible hybrid vehicle, comprising:

[0008] A battery pack, which is composed of one battery cell or a plurality of battery cells electrically connected, wherein the battery pack is provided in multiple groups;

[0009] A balancing circuit board, which is electrically connected to the battery pack;

[0010] A containing shell has an opening which covers the balancing circuit board, the battery pack is arranged in the containing shell, and an identification structure is arranged on the battery pack and / or the containing shell.

[0011] Preferably, the identification structure is one or more of a pattern, text or symbol.

[0012] Preferably, gaps for air circulation are provided between adjacent battery cells.

[0013] Preferably, a temperature sensor and a fixing structure for mounting a wiring harness of the temperature sensor are provided on the cover plate of the accommodating shell.

[0014] Preferably, a power interface is provided on the accommodating shell or the balancing circuit board.

[0015] Preferably, it further comprises a plurality of electrical connectors, and the positive and negative electrodes of the plurality of battery cells are electrically connected in series via the electrical connectors.

[0016] Preferably, a plurality of raised female buckles are arranged on the first side surface of the accommodating shell, and a raised male buckle which is engaged with or separated from the raised female buckle is arranged on the second side surface of the accommodating shell.

[0017] Preferably, a plurality of heat dissipation holes are provided on the third side surface of the accommodating shell.

[0018] Preferably, the accommodating shell is provided with positive and negative pole markings.

[0019] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0020] 1. The design of the battery pack can be set according to the number of existing battery packs that need to be replaced, so that when the existing batteries are replaced by sodium-ion batteries in compatible hybrid vehicles, a compatible operating voltage range is formed to adapt to the use of existing vehicles, forming compatible use in the operating voltage and ensuring the basis for battery replacement.

[0021] 2. A balancing circuit board is provided on the sodium-ion battery for compatible hybrid vehicles to ensure that the charge and discharge states of the batteries are similar during the use of multiple battery cells, to avoid excessive charge and discharge of one or some battery cells, to make the service life of the battery cells similar, and to improve the safety and practicality of use.

[0022] 3. An identification structure, such as a pattern, text or symbol, can be set on the container shell or battery pack for identification to prevent users or operators from installing the battery or battery pack in the wrong direction when replacing the battery pack, thereby improving the safety and convenience of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a front view of a compatible hybrid vehicle sodium ion battery according to the utility model;

[0024] Figure 2 This is a schematic structural diagram of the compatible hybrid vehicle sodium ion battery of the utility model from a back view;

[0025] Figure 3 This is a schematic diagram of the internal structure of the compatible hybrid vehicle sodium ion battery of the utility model;

[0026] Figure 4 It is a schematic diagram of the structure of the balancing circuit board of the sodium ion battery for a compatible hybrid vehicle according to the utility model;

[0027] Figure 5 This is a schematic structural diagram of the bottom surface of the compatible hybrid vehicle sodium ion battery of the utility model;

[0028] Figure 6 It is a partial structural schematic diagram of the sodium ion battery for a compatible hybrid vehicle according to the utility model;

[0029] Figure 7 The present invention is a schematic structural diagram of a battery pack of a sodium-ion battery for a compatible hybrid vehicle.

[0030] Description of reference numerals:

[0031] 10. battery pack; 101. battery cell; 102. gap;

[0032] 20. Balance circuit board; 201. Power interface;

[0033] 30. accommodating shell; 31. temperature sensor; 32. fixing structure;

[0034] 301, raised female buckle; 302, raised male buckle; 303, heat dissipation hole; 304, positive and negative pole identification;

[0035] 40. Logo structure;

[0036] 50. Electrical connectors. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0040] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0041] Example

[0042] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment provides a sodium-ion battery for a compatible hybrid vehicle, including a battery pack 10, a balancing circuit board 20 and a containing shell 30. The battery pack 10 is composed of one battery cell 101 or multiple battery cells 101 electrically connected, and the battery pack 10 is provided with multiple groups; the balancing circuit board 20 is electrically connected to the battery pack 10; the containing shell 30 has an opening that covers the balancing circuit board 20, the battery pack 10 is arranged in the containing shell 30, and an identification structure is provided on the battery pack 10 and / or the containing shell 30.

[0043] In this embodiment, the number of battery cells 101 (i.e., batteries) in the battery pack 10 can be set manually, that is, different numbers of batteries are connected in series in the battery pack 10 to form a compatible operating voltage range, adapted to the use of different existing vehicles, and ensure the basis for battery replacement. In addition, for the design of the battery cell 101, which can be a sheet battery or a cylindrical battery, the sheet battery can be more flexibly designed in terms of the size of the outer contour, so that the compatible hybrid vehicle sodium ion battery produced can match the existing battery pack in the vehicle. The advantages of cylindrical lithium batteries are: good consistency, high bending strength performance, safe and not easy to explode (good sealing), high energy density (small single energy, easy to control when a safety accident occurs) and low internal resistance (greatly reducing the battery's self-consumption of electricity), etc., with good practical performance.

[0044] Specifically, some existing vehicles use nickel-metal hydride batteries as energy sources, and sodium-ion batteries are used to replace nickel-metal hydride batteries. Sodium-ion batteries can achieve higher C rates and higher capacities. With the same capacity, weight saving means reduced vehicle gross weight and better fuel economy. Reducing the number of battery packs 10 also simplifies the installation process by reducing the number of connectors and reducing installation time.

[0045] For example: Sodium-ion batteries have a typical nominal voltage of 3.1V. A 5S (string) arrangement of sodium-ion cells can provide a nominal voltage of about 15.5V, which is compatible with a 12S NiMH battery setup, which has a typical nominal voltage of about 14.4V. And, the slightly higher nominal voltage is a necessary safety buffer, which is to prevent the sodium battery from being overcharged, as it will reach the factory-predetermined maximum voltage earlier, therefore, terminating the charge earlier, which is beneficial to life and safety. Another additional benefit of the slightly higher nominal voltage is to give the car computer a sense that there is excess battery energy, therefore promoting the use of electricity, which helps improve fuel economy and faster acceleration.

[0046] Among them, the C rate is usually used to express the size of the general charge and discharge current. C is used to express the ratio of the battery charge and discharge current, that is, the rate. That is: charge and discharge rate = charge and discharge current / rated capacity; for example: when a battery with a rated capacity of 100Ah is discharged at 20A, its discharge rate is 0.2C. Battery discharge C rate, 1C, 2C, 0.2C is the battery discharge rate: a measure of the speed of discharge. The capacity used is discharged in 1 hour, which is called 1C discharge; 5 hours is discharged, which is called 1 / 5 = 0.2C discharge. Generally, the capacity of the battery can be detected by different discharge currents. For a 24AH battery, the 2C discharge current is 48A, and the 0.5C discharge current is 12A.

[0047] Specifically, sodium-ion batteries have excellent performance and have a wider temperature range of adaptability than existing nickel-hydrogen batteries. Sodium-ion batteries can provide electrical energy to loads in the range of -30°C to 70°C, and have a relatively wide range of adaptability. Preferably, in a high temperature environment of 60°C, the discharge efficiency of sodium-ion batteries can still reach 95%, which can ensure discharge performance at high temperatures. Therefore, for the heat dissipation design of sodium-ion batteries for compatible hybrid vehicles, it can provide a higher fault tolerance rate, thereby improving the flexibility and practicality of the design.

[0048] In addition, sodium-ion batteries can be discharged to 0V without causing damage to the battery, and the battery itself has a long service life to ensure the performance of the battery and compatible hybrid vehicle sodium-ion batteries. This advantage of sodium-ion batteries is greatly superior to other batteries and can avoid the effect of battery damage.

[0049] Furthermore, if Figure 4 and Figure 6 As shown, in this embodiment, a sodium ion battery balancing circuit board 20 is provided on the sodium ion battery for a compatible hybrid vehicle to ensure that the charge and discharge states of the batteries are similar during the use of multiple battery cells 101, thereby avoiding excessive charge and discharge of one or some battery cells 101, making the service life of the battery cells 101 similar, and improving the safety and practicality of use.

[0050] Furthermore, in this embodiment, an identification structure (not shown in the figure) is provided on the battery pack 10 and / or the containing shell 30, and the identification structure is one or more of a pattern, text or symbol.

[0051] Specifically, the identification structure can be an arrow pattern; or a text or letter identification, such as a directional text identification of "left" or "right", or a letter identification of "Left" or "Right"; or it can be a character identification of "+" or "-", etc., and can also be used in combination. Through the design of the identification structure, the installation direction of the battery pack 10 or the accommodating shell 30 can be identified, avoiding the user or operator from making mistakes in the installation direction of the battery or the compatible hybrid vehicle sodium ion battery when replacing the battery pack, thereby improving the safety and convenience of installation.

[0052] The identification structure can also be provided with multiple identifications for different functions, such as identifications for the positive and negative poles of the battery pack 10; or identifications for the position of the plug interface; or identifications for the position of the bottom or top surface, etc., so as to assist the user in quickly identifying the position and orientation of the battery pack 10 or the housing shell 30, thereby improving the convenience of use.

[0053] like Figure 3 and Figure 6As shown, in this embodiment, gaps 102 for air circulation are provided between adjacent battery cells 101. The battery cells 101 generate heat during operation, and the provision of the gaps 102 can form a good air channel, form airflow, and thus achieve a gas flow-type heat dissipation effect, thereby improving the safety and practicality of the structural design.

[0054] like Figure 3 As shown, in this embodiment, a temperature sensor 31 and a fixing structure 32 for mounting a wiring harness of the temperature sensor 31 are provided on the cover plate of the housing 30. The temperature sensor 31 may be an NTC type temperature sensor 31, which forms a real-time monitoring of the temperature of the battery in the housing 30 and feeds back corresponding temperature information. In order to facilitate the installation and protection of the temperature sensor 31, the temperature sensor 31 is installed on the middle part of the cover plate of the housing 30, and a rectangular base is provided for covering and fixing to form protection. At the same time, a protrusion, i.e., a fixing structure 32, is symmetrically extended from one side of the rectangular base. In order to facilitate the fixing of the wiring harness, a through hole is provided on the protrusion to fix the direction of the wiring harness.

[0055] like Figure 4 As shown, in this embodiment, a power interface 201 is provided on the accommodating shell 30 or the balancing circuit board 20. The power interface 201 has the same structure and can be a vehicle power interface 201 for charging according to the CEE standard. When replacing an existing battery pack or battery package, a perfect compatibility effect can be achieved.

[0056] like Figure 7 As shown, the present embodiment further includes a plurality of electrical connectors 50, and the positive and negative electrodes of the plurality of battery cells 101 are electrically connected in series through the electrical connectors 50. The electrical connectors 50 may be copper sheets or copper bars, and are electrically connected by welding, so that the battery cells 101 are firmly connected, and the structural design of the copper bars is not prone to circuit separation or aging problems, has good conductivity and structural strength, and improves practicality.

[0057] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, a plurality of raised female buckles 301 are arranged on the first side of the housing 30, and a raised male buckle 302 that is engaged with or separated from the raised female buckle 301 is arranged on the second side of the housing 30. The raised female buckle 301 and the raised male buckle 302 can be arranged on two opposite sides. If the housing 30 is a suitcase-like structure, the raised female buckle 301 and the raised male buckle 302 can be arranged on two opposite sides of the largest area on the housing 30. The raised female buckle 301 has an open circular groove larger than a semicircle, and the raised male buckle 302 is a raised round bar, thereby forming a buckling purpose.

[0058] Furthermore, raised female buckles 301 or raised male buckles 302 can be arranged side by side on the side of the accommodating shell 30, and each raised female buckle 301 or raised male buckle 302 is designed to be intermittent to provide assembly between surfaces, while forming a gap 102 between the compatible hybrid vehicle sodium-ion batteries, which will not be completely fitted, which is beneficial to heat dissipation and improves practicality.

[0059] like Figure 5 As shown, in this embodiment, a plurality of heat dissipation holes 303 are provided on the third side surface of the accommodating shell 30. The heat dissipation holes 303 can be arranged in a matrix and provided at multiple positions, thereby improving the heat dissipation effect of the sodium ion battery for compatible hybrid vehicles and having good practicality.

[0060] like Figure 3 and Figure 5 As shown, in this embodiment, positive and negative electrode markings 304 are provided on the housing shell 30, and markings can be made at multiple positions on the cover plate and / or side of the housing shell 30, so that the operator can quickly and accurately know the positive and negative electrode positions of the sodium ion battery for compatible hybrid vehicles, thereby improving practicality.

[0061] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model 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 ion battery for a compatible hybrid vehicle, characterized in that: include: A battery pack, which is composed of a plurality of battery cells electrically connected, and the battery pack is provided in multiple groups; A balancing circuit board, which is electrically connected to the battery pack; A containing shell has an opening which covers the balancing circuit board, the battery pack is arranged in the containing shell, and an identification structure is arranged on the battery pack and / or the containing shell.

2. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: The identification structure is one or more of patterns, words or symbols.

3. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: Gaps for air circulation are arranged between adjacent battery cells.

4. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: A temperature sensor and a fixing structure of a wiring harness for installing the temperature sensor are arranged on the cover plate of the accommodating shell.

5. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: The accommodating shell or the balancing circuit board is provided with a power interface.

6. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: It also includes a plurality of electrical connectors, through which the positive and negative electrodes of the plurality of battery cells are electrically connected in series.

7. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: A plurality of raised female buckles are arranged on the first side surface of the accommodating shell, and a raised male buckle which is engaged with or separated from the raised female buckle is arranged on the second side surface of the accommodating shell.

8. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: A plurality of heat dissipation holes are arranged on the third side surface of the accommodating shell.

9. The compatible hybrid vehicle sodium ion battery according to claim 1, characterized in that: The accommodating shell is provided with positive and negative pole markings.

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