Large sodium ion cylindrical battery module

Abstract

The utility model discloses a sodium ion cylindrical battery large module. The sodium ion cylindrical battery large module comprises a shell and an external acquisition wire harness, a battery cell is mounted in the shell, and an external acquisition wire harness is arranged on the outer side of the shell; the external acquisition wiring harness is routed through the wiring harness cedar base; the shell comprises an upper support, a lower support connected and matched with the upper support, a first end plate and a second end plate, wherein the first end plate and the second end plate are installed on the two sides of the upper support and the two sides of the lower support respectively. The first end plate and the second end plate are both provided with air duct holes. Battery cell placing grooves are formed in the lower surface of the upper bracket and the upper surface of the lower bracket, and the battery cells are mounted in the battery cell placing grooves; and collector plates are arranged on the upper surface of the upper bracket and the lower surface of the lower bracket and are connected with the battery cells. According to the large sodium ion cylindrical battery module disclosed by the utility model, the structure of the battery module is more stable, the heat dissipation performance is improved, the electrical connection is safer and more reliable, and meanwhile, the overall integration level and the space utilization efficiency are also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of sodium ion cylindrical battery large module, belong to energy storage and battery technical field. BACKGROUND

[0002] Cylindrical battery large module is an important application form of sodium ion battery, mainly relying on the integration and modular design of multiple sodium ion battery monomers, which can effectively improve the energy density and stability of the system. Compared with small battery monomers, cylindrical battery module has higher structural compactness, better thermal management performance and stronger current carrying capacity, suitable for high-power, high-capacity energy storage needs.

[0003] There are some problems in the existing cylindrical battery module. First, many cylindrical battery modules adopt small modular design, with fewer series and parallel connections, relatively simple inter-module connection structure and fewer voltage and temperature collection points. In order to connect multiple small modules, it is usually necessary to separately arrange and fix complex wiring harness, which increases the difficulty and complexity of wiring. Secondly, the stacking structure of the existing battery module is mostly lateral stacking, relying on the side of the module to bear the weight and supported by the large surface of electrical connection. This method can easily cause uneven gaps between the cells, and since the cells will expand during charging and discharging, the electrical connection parts and the entire structure in the module may be subjected to alternating stress of compression and expansion, which can increase the mechanical fatigue and failure risk of the module. In addition, the existing battery module also has problems in internal wiring design. With the expansion and contraction of the cells, the wiring may be pulled or rubbed, causing unstable electrical connection and increasing the failure risk of the battery system.

[0004] Therefore, it is necessary to design a new type of sodium ion cylindrical battery large module, which not only changes the design of the battery stacking structure, but also ensures uniform heat dissipation in the module. Moreover, it can weaken the impact on the wiring of the battery module under the alternating stress of cell compression and expansion, thereby improving the efficiency of the group and the production efficiency, to meet the safety and efficiency requirements of the cylindrical battery module in use. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims to provide a sodium ion cylindrical battery large module with non-stacking structure, uniform heat dissipation and external collection wiring harness.

[0006] In order to achieve the above object, the utility model discloses a sodium ion cylindrical battery big module, including the casing and external collection wire harness, the casing is internally mounted with the electric core, the casing outside is provided with external collection wire harness, external collection wire harness is through the wire harness fir tree seat and goes line, the casing includes upper support, the lower support of upper support interfit and the first end plate and the second end plate of installing respectively in the both sides of upper support and lower support, the first end plate and the second end plate all are provided with air duct hole, the lower surface of upper support and the upper surface of lower support are provided with electric core placing groove, and the electric core is installed in electric core placing groove, the upper surface of upper support and the lower surface of lower support all are provided with the current collector plate, and the current collector plate is connected with the electric core.

[0007] The upper surface of the upper support and the lower surface of the lower support are provided with wire harness fixing structures.

[0008] The upper support is also provided with a first side pillar, and the first side pillar is provided with a positioning rivet column.

[0009] The first side pillar and the second side pillar are both provided with a first wire harness fir tree seat.

[0010] The inner side of the first end plate and the second end plate is provided with a wave-shaped electric core limiting edge.

[0011] Each branch end of the external collection wire harness is provided with a temperature collection terminal and a voltage collection terminal, and the temperature collection terminal and the voltage collection terminal are connected with the current collector plate respectively.

[0012] The current collector plate is provided with a cantilever, and the upper surface of the upper support and the lower surface of the lower support are both provided with a current collector plate welding groove for placing the cantilever.

[0013] The bottom of the lower support is provided with a plurality of support structures.

[0014] The electric core is a plurality of, and the electric core is placed in the electric core placing groove in a positive-negative pole staggered manner of one row of positive poles and one row of negative poles.

[0015] The electric core positioning protrusion is arranged near the electric core placing groove of the upper support.

[0016] The utility model discloses a sodium ion cylindrical battery big module, through setting up the electric core placement groove and adopting the vertical electric core placement mode, guarantee the fixed gap between the electric core, still set up the auxiliary cooperation of electric core positioning protruding, effectively guarantee the accurate positioning of electric core. Secondly, the two poles of electric core are connected with the current collecting plate, and the positive and negative poles are placed in the staggered mode to effectively reduce the current path length in the battery pack, through the optimization of the current flow path, can reduce the internal resistance, improve the overall battery efficiency and charge-discharge performance, can also ensure that the current evenly flows in each electric core, avoids local overheating or overload. Moreover, the air duct hole of first end plate and second end plate can promote the air circulation in the battery module, help the effective emission of heat, reduce the working temperature of battery pack, reduce the overheating problem, thereby improve the safety and performance of battery. In addition, the external collection wire harness is reasonably wired in the wire harness fir tree seat mode, and is equipped with temperature and voltage collection terminals, optimizes the electrical connection and management, also reduces the influence of stress on the wire harness due to expansion or compression, improves the safety and service life of battery system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Figure 2 It is the exploded structural schematic diagram of the utility model.

[0019] Figure 3 It is the upper support structural schematic diagram of the utility model.

[0020] Figure 4 It is the lower support structural schematic diagram of the utility model.

[0021] Figure 5 It is the end plate (outer side) structural schematic diagram of the utility model.

[0022] Figure 6 It is the end plate (inner side) structural schematic diagram of the utility model.

[0023] Figure 7 It is the wire harness fixed schematic diagram of the utility model.

[0024] Figure 8 It is the bottom support and current collecting plate welding schematic diagram of the utility model.

[0025] Figure 9 It is the current collecting plate structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail through the drawings and specific embodiments.

[0027] As Figures 1-9The utility model discloses a sodium ion cylindrical battery big module, including the casing and external collection wire harness 5, the casing inside is equipped with the electric core 7, the casing outside is provided with external collection wire harness 5, external collection wire harness 5 is through the wire harness fir tree seat and goes line, the casing includes upper support 1, with the lower support 2 of upper support 1 interface cooperation and install first end plate 3 and second end plate 4 respectively at the both sides of upper support 1 and lower support 2, first end plate 3 and second end plate 4 all are provided with air channel hole 32, the lower surface of upper support 1 and the upper surface of lower support 2 are provided with electric core placing groove 13, and the electric core 7 is installed in electric core placing groove 13, the upper surface of upper support 1 and the lower surface of lower support 2 all are provided with current collector plate 6, and current collector plate 6 is connected with electric core 7, through the cooperation design of upper support 1 and lower support 2, electric core placing groove 13 ensures that electric core 7 is stably placed, prevents electric core 7 from displacement in the working process, strengthens the overall structural stability of module. The air channel hole 32 of first end plate 3 and second end plate 4 is set, combines the contact design of current collector plate 6 and electric core 7, strengthens the heat dissipation effect of module, promotes the effective diffusion of heat, reduces the overheating risk, thereby prolongs the service life of battery. External collection wire harness 5 goes line through the wire harness fir tree seat mode, effectively arranges and fixes the electrical connection, avoids the wire harness slack or electrical contact bad. External wire harness is equipped with temperature and voltage acquisition terminal 53, can monitor battery state in real time, improves the response speed and reliability of battery management monitoring.

[0028] The upper surface of the upper support 1 and the lower surface of the lower support 2 are provided with wire harness fixing structure 52 for fixing the wires of the external collection wire harness 5.

[0029] The first end plate 3 is provided with a positive electrode mark, and the second end plate 4 is provided with a negative electrode mark.

[0030] The upper support 1 is further provided with a first side pillar 12, and the first side pillar 12 is provided with a positioning rivet column 121. The lower support 2 is provided with a second side pillar 22 corresponding to the first side pillar 12, and the second side pillar 22 is provided with a positioning groove 221 for riveting. The first side pillar 12 and the second side pillar 22 are connected by riveting, ensuring the firm cooperation between the upper support 1 and the lower support 2, enhancing the overall structural stability of the battery module. Moreover, this design effectively reduces the structural looseness caused by vibration, external force or temperature change, ensuring the reliability of the battery pack in use. In addition, the design of the positioning rivet column 121 and the positioning groove 221 simplifies the assembly process of the module, making the support connection more accurate and efficient. By riveting, the cumbersome screws or other connection methods are avoided, improving production efficiency and reducing production cost.

[0031] The first side support 12 and the second side support 22 are both multiple, and the first side support 12 is further provided with a first wiring fir tree seat cable tie fixing hole 122. The side of the first end plate 3 and the second end plate 4 is provided with a second wiring fir tree seat cable tie fixing hole 31. The arrangement of multiple first side supports 12 and second side supports 22 is used to share the mechanical load of the battery module, thereby enhancing the stability and compression resistance of the entire module. In addition, the wiring fir tree seat cable tie fixing hole provided on the first side support 12 and the end plate provides a more stable fixing point for the installation of the wiring fir tree seat. Through the fixing of the cable tie, it can ensure that the wiring is arranged in order in the module, avoiding the loosening, swinging or friction of the wiring, thereby reducing the risk of failure caused by poor electrical connection.

[0032] The inner side of the first end plate 3 and the second end plate 4 is provided with a wavy cell limiting edge 34, which is used to effectively fix the cell 7 in the battery module, avoiding displacement or shaking of the cell 7 during use. The wavy edge provides multiple contact points for the cell 7, increasing the contact area between the cell 7 and the end plate, thereby improving the positioning accuracy and stability.

[0033] The first end plate 3 and the second end plate 4 are both provided with a positioning riveting block 33, and the upper support 1 and the lower support 2 are correspondingly provided with a riveting groove 35 matched therewith, which is used to fix the end plate and the support through riveting, thereby ensuring the close combination of each part of the battery module. The riveting connection is more stable than the traditional threaded or welded connection, which can effectively avoid loosening caused by vibration or long-term use, thereby improving the stability and durability of the overall structure.

[0034] Each branch end of the external collection wiring 5 is provided with a temperature collection terminal 54 and a voltage collection terminal 53, which are respectively connected with the current collector plate 6. Through the design of the branch end of the external collection wiring 5, the connection between the temperature collection terminal 54 and the voltage collection terminal 53 and the current collector plate 6 is more orderly and orderly, avoiding the complexity of internal wiring. This not only simplifies the wiring process, but also effectively utilizes the space inside the battery pack, thereby improving the structural compactness and space utilization rate of the battery module.

[0035] The current collector plate 6 is provided with a cantilever 61, and the upper surface of the upper support 1 and the lower surface of the lower support 2 are correspondingly provided with a current collector plate 6 welding groove 24 for placing the cantilever 61. The design of the cantilever 61 can optimize the contact between the current collector plate 6 and the cell 7, improve the efficiency of current transmission, and reduce resistance loss. At the same time, the cooperation of the recess design and the welding groove helps to ensure the stability of the contact between the current collector plate 6 and the cell 7, thereby improving the performance and efficiency of the overall battery pack.

[0036] The bottom of the lower support 2 is provided with a plurality of support structures 23 for enhancing the support force and improving the stability of the battery module.

[0037] The plurality of battery cells 7 are placed in the battery cell placement grooves 13 in a positive-negative electrode staggered arrangement of one row of positive electrodes and one row of negative electrodes, so as to optimize the current flow path, reduce internal resistance, improve overall battery efficiency and charge-discharge performance, and ensure uniform current flow in each battery cell 7, avoiding local overheating or overloading.

[0038] The battery cell positioning protrusions 11 are arranged near the battery cell placement grooves 13 of the upper support 1, so as to accurately place the battery cells 7 in the battery cell placement grooves 13 during assembly, reducing assembly errors caused by human operation or production deviation.

[0039] The lifting holes 21 are arranged on both sides of the lower support 2, which can facilitate transportation and installation of the battery module and also serve as heat dissipation holes.

[0040] By adopting the above technical solutions, the sodium-ion cylindrical battery large module can ensure accurate positioning of the battery cells 7 by arranging the battery cell placement grooves 13 and placing the battery cells 7 vertically, and also by arranging the battery cell positioning protrusions 11 for auxiliary cooperation.

[0041] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A sodium-ion cylindrical battery large module, characterized by: The shell is internally provided with an electric core, and externally provided with an external collection wire harness; the external collection wire harness is routed through a wire harness tree seat; the shell comprises an upper support, a lower support in abutting cooperation with the upper support, and a first end plate and a second end plate respectively mounted on two sides of the upper support and the lower support; the first end plate and the second end plate are both provided with air duct holes; the lower surface of the upper support and the upper surface of the lower support are provided with an electric core placing groove, and the electric core is mounted in the electric core placing groove; the upper surface of the upper support and the lower surface of the lower support are both provided with a current collecting plate, and the current collecting plate is in abutment with the electric core.

2. The sodium-ion cylindrical battery module of claim 1, wherein: The upper surface of the upper support and the lower surface of the lower support are both provided with a wire harness fixing structure.

3. The sodium-ion cylindrical battery module of claim 1, wherein: The upper support is further provided with a first side support column, and the first side support column is provided with a positioning riveting column; correspondingly, the lower support is provided with a second side support column in cooperation with the first side support column, and the second side support column is provided with a positioning groove for riveting.

4. The sodium-ion cylindrical battery large module of claim 3, wherein: The first side support column and the second side support column are both multiple, and the first side support column is further provided with a first wire harness tree seat strap fixing hole.

5. The sodium-ion cylindrical battery large module of claim 4, wherein: The inner side of the first end plate and the second end plate is both provided with a wavy electric core limiting edge; the side edge of the first end plate and the second end plate is further provided with a second wire harness tree seat strap fixing hole.

6. The sodium-ion cylindrical battery module of claim 1, wherein: Each branch end of the external collection wire harness is provided with a temperature collection terminal and a voltage collection terminal, and the temperature collection terminal and the voltage collection terminal are respectively in abutment with the current collecting plate.

7. The sodium-ion cylindrical battery module of claim 1, wherein: The current collecting plate is provided with a cantilever, and correspondingly, the upper surface of the upper support and the lower surface of the lower support are both provided with a current collecting plate welding groove for placing the cantilever.

8. The sodium-ion cylindrical battery module of claim 1, wherein: The bottom of the lower support is provided with multiple support structures.

9. The sodium-ion prismatic battery module of any one of claims 1-8, wherein: The electric core is multiple, and the electric core is placed in the electric core placing groove in a way that the positive and negative poles are staggered with one row of positive poles and one row of negative poles.

10. The sodium-ion cylindrical battery module of claim 9, wherein: The electric core placing groove of the upper support is provided with an electric core positioning protrusion.

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