Sodium ion battery pack

Abstract

The utility model relates to the technical field of methods or devices for directly converting chemical energy into electric energy, in particular to connection of electrodes. According to the technical scheme, the sodium ion battery pack comprises a plurality of modular battery units, each battery unit comprises an integrated plate, a plurality of battery cells and a battery shell, the integrated plates and the battery cells are located in the battery shells, and the battery units are mutually connected through communication lines and power series lines to form the battery pack. The utility model provides a sodium ion battery pack which solves the problems that the sodium ion battery pack in the prior art cannot be suitable for sodium ion batteries, is large in size and poor in applicability, and achieves the purposes of being small in size, low in cost, high in adaptability and suitable for the sodium ion batteries.

Description

TECHNICAL FIELD

[0001] The utility model relates to the method or device technical field for directly transforming chemical energy into electric energy, especially electrode's connection. BACKGROUND

[0002] The technical progress of the electric vehicle industry will be a key factor in driving industry development. This includes innovation in battery technology, improvement in charging infrastructure, application of intelligent driving technology, etc. In particular, the improvement in energy density and reduction in cost of battery technology will directly affect the performance and market acceptance of electric vehicles. The market share of lead-acid batteries can still reach more than 75%. At present, lead-acid batteries are used in multiple modules in series. Therefore, the opening of the battery compartment of two-wheeled and three-wheeled electric vehicles is basically single or two lead-acid battery volumes. For the huge lead-acid market, sodium batteries have higher energy density and lower cost than lead-acid batteries, and the weight is only half of that of lead-acid batteries, which has a great market advantage. Modularization of sodium batteries is more conducive to adapting to more lead-acid vehicle models to achieve the purpose of equivalent replacement of lead-acid batteries. For example, a Chinese patent with publication number CN210607441U discloses a modular battery pack, and the technical solution is as follows: The utility model relates to a kind of modular battery pack, including a plurality of electric chip, a plurality of fixed frame, circuit board and cover plate group, the electric chip has upper end face and the lower end face opposite to upper end face, the upper end face is equipped with positive pole, negative pole lug, the fixed frame is fixedly connected in sequence, and one electric chip is clamped between adjacent two fixed frames, the circuit board is placed on the upper end face of electric chip, and lug is directly connected with circuit board and fixed on the fixed frame, and the cover plate group is covered above circuit board and is fixedly connected with fixed frame.The utility model can realize large-scale production, and the overall structure is simple, easy to disassemble and assemble, has high anti-shock performance, good safety performance, and has broad market and application prospect. However, the above-mentioned modular battery pack cannot be applied to sodium ion batteries, and the size is large, which cannot be applied to the electric vehicle industry. SUMMARY

[0003] The utility model solves the problem that the prior art cannot be applied to sodium ion batteries, has a large size and poor applicability. The utility model provides a sodium ion battery pack, which achieves the purposes of small size, low cost, high adaptability and application to sodium ion batteries.

[0004] To achieve the above-mentioned purposes, the utility model adopts the following technical solutions:

[0005] A sodium ion battery pack includes a plurality of modular battery units, the battery unit includes an integrated board, a plurality of electric cores and a battery shell, the integrated board and the electric cores are located in the battery shell, and the battery units are connected to each other through communication lines and power series lines to form a battery pack.

[0006] The advantage of this design is that the modular design can simplify the assembly and maintenance of the battery pack, and at the same time realize efficient connection between the battery cells through the communication line and the power series line, improving the performance and flexibility of the system.

[0007] As a preferred, a plurality of tab slots are distributed on the integrated plate, and raised reinforcing ribs are provided between the tab slots.

[0008] The advantage of this design is that the configuration of the reinforcing ribs can increase the structural strength, improve the durability and reliability of the battery pack, and reduce the impact of vibration and impact on the battery.

[0009] As a preferred, a communication interface is provided on the integrated plate, and the communication line connects each battery cell through the communication interface.

[0010] The advantage of this design is that the existence of the communication interface simplifies the data transmission between the battery cells, and enhances the functionality and scalability of the battery management system.

[0011] As a preferred, the top of the cell is provided with protruding positive and negative tabs, which are inserted into the tab slots.

[0012] The advantage of this design is that stable connection is achieved by inserting the tabs into the tab slots, reducing resistance and energy loss, and improving the electrical performance of the battery.

[0013] As a preferred, the sum of the number of positive and negative tabs is equal to the number of tab slots.

[0014] As a preferred, the battery shell includes an upper cover and a lower shell, which are fixed by buckles, and a plurality of protective covers are provided on the upper cover and the lower shell, and the upper cover is provided with injection molded terminals and series rubber plug wire harness.

[0015] The advantage of this design is that the use of buckle fixation and protective cover protection design can simplify the assembly process, improve the sealing and safety of the shell, and the injection molded terminals and series rubber plug wire harness provide efficient electrical connection and protection.

[0016] As a preferred, the battery shell is fixed with a handle on one side.

[0017] As a preferred, the upper cover is provided with a protruding control end, and the control end is provided with an output interface, and the integrated plate is provided with additional components, including relays, circuit breakers and heat sinks.

[0018] The advantage of this design is that the protruding control end provides clear interface access, and the additional relays, circuit breakers and heat sinks enhance the safety, control ability and thermal management performance of the battery.

[0019] Compared with the prior art, the utility model has the beneficial effects that.

[0020] 1. The utility model discloses a modular unit's design and communication interface realize efficient connection and intelligent management, especially adapt to the unique demand of sodium ion battery, modular design improves the flexibility and expansibility of battery pack, guarantees the stability of battery performance and the high efficiency of data transmission simultaneously, and the adaptability of sodium ion battery can reach the effect of equivalent replacement lead -acid battery greatly increases performance.

[0021] 2. The utility model discloses a compact buckle fixing and cover and the design of integral board make battery pack more small and exquisite, and the adaptability is high, and such design not only improves the structural strength of battery pack, but also reduces the difficulty of assembly and maintenance, and is convenient to integrate and use in various equipment, and simultaneously, the small size design adapts to the high demand of electric vehicle to space and portability, is suitable for multiple application scenes, can adapt to more vehicle type battery seat cabin.

[0022] 3. The utility model discloses the output interface and additional components, such as relay, circuit breaker and radiator, are introduced in the control end design, significantly improve the safety and thermal management performance of battery pack, and the reasonable layout of these components optimizes the control and protection function, and maintains the compactness of equipment, and such design ensures that battery pack can work efficiently in limited space while running safely, meets the demand of complex application environment, and makes battery unit more convenient to transfer into battery compartment through battery compartment opening. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an explosion view of the utility model of a sodium ion battery pack.

[0024] Figure 2 It is an integral board partial enlarged view of the utility model of a sodium ion battery pack.

[0025] Figure 3 It is an upper cover structure schematic view of the utility model of a sodium ion battery pack.

[0026] Illustration: 1 upper cover, 1.1 control end, 1.2 output interface, 2 integral board, 2.1 communication interface, 2.2 reinforcing rib, 2.3 tab slot, 3 communication line, 4 electric core, 4.1 positive tab, 4.2 negative tab, 5 handle, 6 power series connection line, 7 lower shell. DETAILED DESCRIPTION

[0027] For the purpose of making the purpose, technical scheme and advantages of the present disclosure clearer, the following will make a further detailed description of the embodiments of the present disclosure in combination with the drawings. The proportion of various components is not drawn according to the true proportion, and the proportion and size shown in the drawings should not limit the essential technical scheme of the present disclosure. These embodiments do not describe all the details, and the present disclosure is not limited to the specific embodiments described.

[0028] Referring to Figures 1-3 As shown in the exploded view, a sodium-ion battery pack includes a plurality of modular battery units, the battery units include an integrated board 2 and a plurality of battery cells 4, and a battery shell, the integrated board 2 and the battery cells 4 are located in the battery shell, and the battery units are connected to each other through communication lines 3 and power series lines 6 to form a battery pack.

[0029] As Figure 1 shown in an embodiment, Figure 1 It is an exploded view of the sodium-ion battery pack of the present disclosure. The sodium-ion battery pack designed by the present disclosure is composed of a plurality of modular battery units, each unit is designed to be relatively independent and standardized to facilitate production and maintenance. This design concept ensures the overall performance and flexibility of the battery pack. In this embodiment, a sodium-ion battery pack is composed of two modular battery units.

[0030] The core component of the battery unit is the integrated board 2, which includes a plurality of tab slots 2.3. These slots are designed for installing battery cells, ensuring quick positioning and stable connection of the battery cells through the tabs during installation. The integrated board also integrates a communication interface 2.1, which enables the battery unit to exchange data with other units through communication lines 3, ensuring the coordinated work of the entire battery pack.

[0031] Each battery unit contains a plurality of battery cells 4, which are the energy storage units of the battery pack. The top of each battery cell is provided with a positive tab 4.1 and a negative tab 4.2, which are inserted into the tab slots 2.3 on the integrated board to form a firm electrical connection. The precise insertion of the tabs not only ensures good electrical conductivity, but also reduces resistance and energy loss. In this embodiment, the number of positive and negative tabs in the battery cell group is 9, and the number of tab slots is 18. In another embodiment, a design scheme of 13 battery cells is adopted, so in this scheme, the number of positive and negative tabs in the battery cell group is 13, and the number of tab slots is 26.

[0032] The battery cells are enclosed by a battery housing, which is composed of an upper cover 1 and a lower shell 7. The upper cover and the lower shell are connected by a snap connection, providing firm structural support and easy disassembly. The upper cover 1 is provided with injection molded terminals, which are used for the connection of external battery devices. A series of rubber plug wire harnesses are used to connect the battery cells with the power series wire 6, forming an overall battery network.

[0033] For easy handling and installation, a handle 5 is fixed on one side of the battery housing, making the battery cells easy to move and position. In addition, the design of the upper cover and the lower shell both take into account the protection factor, and are provided with protective covers to protect the internal components from the external environment.

[0034] The sodium-ion battery pack designed in the utility model not only realizes efficient modularization and standardization in hardware, but also provides some significant benefits in function. First of all, the modular design makes the production, maintenance and expansion of the battery pack simple and efficient. Standardized battery cells can be quickly assembled into battery packs of different capacities and requirements, and when a fault occurs, only a single module needs to be replaced to restore system function without replacing the entire battery pack. This greatly reduces the cost and time of maintenance.

[0035] Secondly, the connection relationship of the battery pack is designed reasonably, ensuring the transmission efficiency and stability. The tab slot and communication interface on the integrated board ensure the stable connection between the cells and the control system. This connection method not only improves the electrical performance, but also reduces the risk of failure caused by poor contact. The design of the battery housing provides additional protection and convenience. The snap-on upper cover and lower shell make the assembly and disassembly of the battery components very convenient, suitable for fast production and maintenance processes. The protective cover design provides an additional layer of protection for the internal cells and circuits, protecting them from environmental factors such as dust, moisture, etc. Finally, the handle increases the convenience during the moving and installation process, especially in application scenarios that require frequent assembly and disassembly, which can greatly reduce the labor burden and improve work efficiency.

[0036] As shown in one embodiment of the utility model, Figure 2 Figure 2 ​The utility model discloses a kind of integral plate of sodium ion battery pack, and the utility model discloses a kind of integral plate of sodium ion battery pack by multiple modular battery unit composition, each battery unit contains key components: integral plate 2, several battery cell 4, and battery shell.Battery cell 4 as the core storage unit of energy, its top is provided with protruding positive electrode tab 4.1 and negative electrode tab 4.2.These tabs are inserted into tab slot 2.3 on integral plate 2, form firm electrical connection.The design of tab slot 2.3 not only provides accurate insertion position, also enhances the mechanical strength of structure by the protruding reinforcing rib 2.2 set up therebetween.This design effectively fixes the position of battery cell tab, prevent displacement during assembly and use, ensure the stability and reliability of electrical connection.The positive electrode tab and the negative electrode tab adopt aluminum tab.

[0037] All components of each battery unit are covered by battery shell, shell is composed of upper cover 1 and lower shell 7, and the two are firmly connected by buckle.In order to increase safety and durability, upper cover 1 and lower shell 7 are each provided with a plurality of protective covers, protect internal components from external impact and environmental factors interference.In addition, upper cover 1 is also provided with injection molding terminal, and these terminals are used for external device connection or current output.Series rubber plug wire harness is used to connect each battery unit through power series connection wire 6, realize electrical series connection inside battery pack.

[0038] Communication line 3 connects each battery unit through communication interface on integral plate, forms an information sharing network system.This design ensures that each battery unit can work cooperatively, realizes intelligent management and state monitoring.For the convenience of installation and movement, the side of battery shell is also designed with handle 5, which greatly increases the convenience of operation.

[0039] The design of the utility model discloses a kind of sodium ion battery pack, which has many advantages, especially in the connecting part of battery cell tab and tab slot.First, the design of tab slot 2.3 not only considers the accurate docking with battery cell tab, but also provides additional structural support through the protruding reinforcing rib 2.2 between slots.This support effectively disperses the mechanical stress at the tab connection, reduces the risk of connection loosening and electrical failure caused by vibration or external force.In addition, the number of tab slots is strictly matched with the number of positive electrode tab 4.1 and negative electrode tab 4.2, to ensure that the tab of each battery cell can be inserted stably, which greatly enhances the reliability and consistency of electrical connection.

[0040] The design of battery shell also provides good protection and operational convenience.The buckle type upper cover 1 and lower shell 7 ensure the firmness and easy disassembly of shell, which not only helps to improve production and maintenance efficiency, but also reduces the risk of human error during production.The existence of protective cover provides additional protection for internal components, preventing dust, moisture and other damage to battery components.

[0041] Finally, the modularity and scalability of the overall battery pack design make it suitable for a variety of application scenarios, can adapt to more vehicle battery seat cabin, and can achieve equivalent replacement of lead-acid batteries. The modular design concept allows the battery pack to be flexibly combined according to actual needs, reducing overall costs and improving market competitiveness.

[0042] As Figure 3 shown in one embodiment, Figure 3 The utility model discloses a kind of upper cover structure of sodium ion battery pack, which is schematically shown in the figure. The sodium ion battery pack designed by the utility model is composed of multiple modular battery units, each battery unit includes an integrated plate 2, a plurality of battery cells 4 and a battery shell. The battery cells 4, as the core of energy storage, have positive and negative tabs 4.1 and 4.2 at their top ends. These tabs are inserted into tab slots 2.3 on the integrated plate 2, achieving stable electrical connection. Between the tab slots, there are raised reinforcing ribs 2.2, which not only ensure the stable positioning of the tabs, but also increase the mechanical strength of the battery unit, preventing the tabs from being affected by vibration and impact during use.

[0043] The battery shell is composed of an upper cover 1 and a lower shell 7, and is fixed by a snap-fit method, which is convenient and stable. The upper cover and the lower shell are provided with multiple protective covers to protect the internal components from external environmental damage. The upper cover 1 is also provided with injection molded terminals and series rubber plug wiring harnesses for electrical connection between the battery pack and external devices.

[0044] Notably, the upper cover 1 is provided with a raised control end 1.1, which integrates output interfaces 1.2. These output interfaces are used to connect external circuits and devices, providing power output and data communication. The design of the control end not only facilitates the expansion and access of the system, but also provides more space for functional integration of the battery pack.

[0045] In addition, the integrated plate 2 is also equipped with additional components, including relays, circuit breakers and heat sinks. The cavity inside the control end is used to accommodate these additional components. The relays and circuit breakers are used for protection and management of the circuit, maintaining the safe operation of the battery pack by automatically disconnecting or connecting the circuit. The heat sink effectively manages the heat of the battery cells, maintaining the battery unit within the optimal temperature range, ensuring stable performance and prolonging service life.

[0046] In this embodiment, the overall size of the battery with 13 strings of battery cells is relatively large. To avoid the empty switch on the vehicle and facilitate connection with the power line of the whole vehicle, a control end is provided at the top, which not only facilitates connection but also has enough space to accommodate additional components.

[0047] The design of the battery pack brings multiple significant advantages, especially in terms of control terminal and additional component integration. First, the output interface 1.2 on the control terminal 1.1 enables flexible connection with external devices, providing an efficient interaction platform for the battery pack and external systems. This design not only simplifies the complexity of system integration but also improves the adaptability and versatility of the battery pack, better adapting to diverse application scenarios.

[0048] The additional components on the integrated board 2 also add extra functions and protection to the battery pack. The presence of relays and circuit breakers ensures that the battery pack can respond quickly in abnormal situations, automatically cutting off the circuit to avoid damage. Such a protection mechanism greatly improves the safety of the battery pack, reducing failure rates and maintenance costs. The heat sink prevents overheating of the battery cells through effective thermal management, keeping the battery cells working at the optimal temperature, thereby improving the overall efficiency and reliability of the battery pack.

[0049] The cavity inside the control terminal is specifically designed to accommodate additional components such as relays, circuit breakers, and heat sinks. This design ensures the rational use of internal space, achieving a compact and efficient component layout. When loading the vehicle, due to the large overall size of the 13-string battery cells, the control terminal at the top provides convenience for avoiding the air switch on the vehicle, and makes the connection with the vehicle power line more convenient. This arrangement not only optimizes the path of electrical connection, reduces current loss, but also provides enough space to accommodate additional components, ensuring that the battery pack can operate stably and safely in any situation. By concentrating these components in the control terminal, the battery pack achieves a highly integrated design, improving the maintainability and scalability of the system, and also providing a more flexible installation and connection scheme for the vehicle. Overall, this design makes the battery pack reach a new level in performance, reliability, and applicability, fully meeting the needs of modern electric vehicles for efficient and stable battery systems.

[0050] In summary, the battery module of the present application can reduce the overall size of the module, making it easier to transfer the battery module into the battery compartment through the battery compartment opening. It can be adapted to more vehicle battery seats and achieve equivalent replacement of lead-acid batteries.

[0051] The present application is not limited to the above-mentioned embodiments, and any changes in shape or material composition are allowed. Any structure design provided by the present application is a variation of the present application and should be considered within the scope of the present application.

Claims

1. A sodium-ion battery pack, characterized by, The application relates to a battery unit, which comprises a plurality of modular battery units, each of which comprises an integrated plate (2), a plurality of battery cells (4) and a battery shell, wherein the integrated plate (2) and the battery cells (4) are located in the battery shell, and the battery units are connected with each other through communication lines (3) and power series lines (6) to form a battery pack.

2. The sodium-ion battery of claim 1, wherein, The integrated plate (2) is provided with a plurality of tab grooves (2.3), and the tab grooves (2.3) are provided with protruding reinforcing ribs (2.2).

3. The sodium-ion battery of claim 1, wherein, The integrated plate (2) is provided with a communication interface (2.1), and the communication lines (3) are connected with the battery units through the communication interface (2.1).

4. The sodium-ion battery of claim 2, wherein, The battery cells (4) are provided with protruding positive tab (4.1) and negative tab (4.2) at the top end, and the positive tab (4.1) and the negative tab (4.2) are inserted into the tab groove (2.3).

5. The sodium-ion battery of claim 4, wherein, The number of the positive tab (4.1) and the negative tab (4.2) is equal to the number of the tab groove (2.3).

6. The sodium-ion battery of claim 3, wherein, The battery shell comprises an upper cover (1) and a lower shell (7), and the upper cover (1) and the lower shell (7) are fixed through buckling, and the upper cover (1) and the lower shell (7) are each provided with a plurality of protective covers.

7. The sodium-ion battery of any one of claims 1 to 6, wherein, The battery shell is fixed with a handle (5) on one side.

8. The sodium-ion battery of claim 6, wherein, The upper cover (1) is provided with a protruding control end (1.1), the control end (1.1) is provided with an output interface (1.2), the integrated plate (2) is provided with additional components, and the additional components comprise a relay, a circuit breaker and a radiator.

9. The sodium-ion battery of claim 8, wherein, The upper cover (1) is provided with an injection molded terminal and a series rubber plug wire harness.

10. The sodium-ion battery of claim 4, wherein, The positive tab and the negative tab adopt aluminum tabs.

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