Sodium ion cell combined module

Abstract

The utility model belongs to the technical field of battery modules, and discloses a sodium ion battery cell combined module which comprises a box body, a plurality of copper bars connected in series and a plurality of battery cell components, each battery cell assembly comprises a battery cell bracket, a copper-nickel connecting sheet and a sodium ion battery cell; the copper-nickel connecting sheets are connected between electrodes of the sodium ion battery cells, the battery cell assemblies are electrically connected in series in the box body, the series copper bars are fixedly arranged at the joints of the battery cell assemblies respectively, the two ends of each series copper bar are fixedly connected with the electrode sheets of the copper-nickel connecting sheets respectively, and the series copper bars are electrically connected with the fixedly connected copper-nickel connecting sheets. Through multi-aspect structural improvement, the overall structural design is simplified, and the use stability is improved due to the arrangement of components such as the battery core assembly and the series copper bars; a plurality of heat dissipation groove holes are formed, so that concentrated heat dissipation of the battery cell combination module is facilitated; the specification and size of the battery cell assembly are unified, and standardized expansion can be realized; by improving the arrangement of the copper-nickel connecting pieces, the assembling efficiency of the combined module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a sodium ion battery cell combination module. Background Art

[0002] With the advocacy of low-carbon and environmentally friendly life in the country and the popularization of low-carbon and environmentally friendly lifestyles, people's demand for energy storage battery capacity is increasing. At present, the capacity of single batteries is very limited, so the application of battery combination modules is becoming more and more extensive; at the same time, people's requirements for the safety of battery combination modules are correspondingly improved, and a safer structural design is required. The design of multiple key components directly enhances the advantages of battery combination modules in market competition. At present, most of the battery products with multiple cells in parallel on the market use a fixed connection method, which is not conducive to the assembly of the product and the improvement of the process, and will also affect some of the product's performance. Most battery cell combination modules are not easy to be connected in series or parallel with other modules, which limits the flexibility and scalability of the battery cell combination modules; non-ventilated isolation blocks need to be set between multiple batteries; the battery packs are sealed in the battery box, which is not easy to dissipate heat and is not easy to be connected in series or parallel with other modules. They are easily damaged and deformed by collisions with external objects during installation, transportation and use, and in severe cases may cause internal short circuits in the sodium ion battery cell combination modules and other faults; such designs seriously affect the service life and safety of the product due to factors such as complex structural design, heat dissipation problems and easy damage, so the service life of the battery cell combination modules in the prior art may be limited.

[0003] In the prior art, Chinese utility model patent document announcement number CN203617356U discloses a lithium-ion module battery, including a battery shell, a battery pack is installed in the battery shell, a battery cover is covered on the battery shell, a pole hole and a signal collection hole are opened on the battery cover, the battery pack is fixed on a combined bracket, bus bars are designed on both sides of the battery pack, poles are connected to the upper part of the bus bars, the poles pass through the pole holes and are fixedly connected to the battery cover by nuts, the battery pack includes battery cells, and the battery cells are evenly distributed on the combined bracket in a symmetrical straight row; although this prior art solves the problem of small combined capacity of battery cells, the module cannot be easily expanded; and the battery cells in the combined module are all welded, which makes it difficult to troubleshoot after the module fails; there are no related standard parts for module expansion, unified heat dissipation and installation and fixing parts design, which is not conducive to the expansion of the combined module.

[0004] In addition, the above-mentioned patented technical solution still has the following deficiencies in actual use: the overall structural design is relatively complex, the battery cells are mostly connected by complex wiring and welding, and isolation blocks are required between multiple batteries; the battery packs are sealed in the battery box, which is not easy to dissipate heat and is not easy to be connected in series and parallel with other combination modules. During installation, transportation and use, it is easy to be damaged and deformed by collision with external objects. In severe cases, it will cause internal short circuits in the battery combination modules and other faults, affecting the safety and service life of the product. Utility Model Content

[0005] The utility model aims to provide a sodium ion battery cell combination module, which simplifies the overall structural design through various structural improvement designs to improve the convenience, stability and safety of the sodium ion battery cell combination module during transportation, installation and use; by arranging battery cell components, copper-nickel connecting sheets and other components, the stability and safety during use are improved; by arranging multiple heat dissipation structures, the unified heat dissipation of the battery cell combination module is facilitated; by improving the design of the copper-nickel connecting sheets and electrode sheets, the assembly efficiency of the combination module is improved; by arranging upper mounting parts and lower mounting parts for use at both ends of the combination module, the rapid assembly and disassembly of the combination module is facilitated, and the problem of easy collision and deformation of the battery cell due to the poor positioning of the combination module is avoided, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sodium ion battery cell combination module comprises a box, a plurality of copper bars connected in series, and a plurality of battery cell assemblies; each of the battery cell assemblies comprises two battery cell brackets, two copper-nickel connecting pieces, and a plurality of sodium ion batteries; each of the battery cell brackets comprises a plurality of mounting holes corresponding to each sodium ion battery cell, each of the sodium ion batteries is mounted side by side on the battery cell brackets, and opposite ends of each of the sodium ion batteries are respectively arranged in the mounting holes on the two battery cell brackets; each of the copper-nickel connecting pieces is arranged on the outside of the battery cell brackets, and the copper-nickel connecting pieces are connected between the electrodes of each of the sodium ion batteries, so that the sodium ion batteries are electrically connected to each other; the copper-nickel connecting pieces are provided with electrode sheets for connecting the battery cell assemblies in series; the box is in the shape of a rectangular box with an opening at the top, and each of the battery cell assemblies is electrically connected in series in the box; each of the series copper bars is respectively fixedly arranged at the connection of each of the battery cell assemblies, and its two ends are respectively fixedly connected to the electrode sheets of the copper-nickel connecting pieces, and the series copper bars are electrically connected to the copper-nickel connecting pieces fixedly connected thereto.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. The sodium ion battery cell combination module provided by the utility model simplifies the overall structural design through various structural improvement designs, significantly improving the convenience, stability and safety of the sodium ion battery cell combination module during transportation, installation and use; by arranging battery cell components, copper-nickel connecting sheets and other components, the stability and safety during use are improved; by arranging multiple heat dissipation structures, the unified heat dissipation of the battery cell combination module is facilitated; by the improved design of the copper-nickel connecting sheets and electrode sheets, the assembly efficiency of the combination module is improved; by arranging upper mounting parts and lower mounting parts for use at both ends of the combination module, the rapid assembly and disassembly of the combination module is facilitated, and the problem of easy collision and deformation of the battery cells due to the poor positioning of the combination module is avoided, which better solves the problems raised in the prior art.

[0010] 2. The utility model simplifies the structural design as a whole, unifies the specifications and dimensions of the battery cell components, and can be standardized and expanded; the battery cell components, series copper bars and other components are provided to improve the stability of use; the multiple heat dissipation slots are provided to facilitate the unified heat dissipation of the battery cell combination module; and the assembly efficiency of the combination module is improved by improving the arrangement of the electrode sheet on the copper-nickel connecting sheet.

[0011] 3. The utility model improves the battery cell assembly, and the battery cell bracket is used in conjunction with the battery cell, which is convenient for rapid assembly and disassembly of the combined module when connected in series. The box and the battery cell assembly are matched to avoid problems such as battery cell collision and deformation due to improper placement of the battery cell assembly.

[0012] 4. The utility model improves the fixing pressure strip and adds a positioning column, which facilitates the connection between the box body and the epoxy resin top plate, saves the positioning process, and ensures that the epoxy resin top plate is not easy to fall off.

[0013] 5. The utility model improves the ventilation and heat dissipation structures in multiple places to avoid the problem of increased temperature of the battery cell components caused by the box body being too long and not ventilated, thereby further improving the safety of the use of the sodium ion battery cell combination module.

[0014] 6. This new model has improved its structure in many aspects, adopted standardized copper-nickel connecting pieces, and set electrode pieces of uniform specifications, so that the series and parallel connection of the combined module is very simple when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional appearance structure of the battery cell combination module in the embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the assembly structure of the battery cell combination module in the embodiment of the present application;

[0017] Figure 3 It is a schematic diagram of the assembly structure of the battery cell assembly in the embodiment of the present application;

[0018] Figure 4 It is a schematic diagram of the assembly structure of the box body and the epoxy resin top plate in the embodiment of the present application;

[0019] Figure 5 It is a schematic diagram of the assembly structure of the battery cell assembly and the epoxy resin top plate in the embodiment of the present application;

[0020] Figure 6 This is a schematic diagram of the top surface structure of the battery cell assembly module of the embodiment of the present application after the epoxy resin top plate is installed;

[0021] Figure 7 It is a schematic diagram of the side structure of the battery cell combination module according to an embodiment of the present application.

[0022] Explanation of the accompanying drawings: 1. Battery cell assembly; 2. Epoxy resin top plate; 3. Fixed pressure strip; 4. Series copper busbar; 5. Epoxy resin partition; 6. Box body; 11. Sodium ion battery cell; 12. Battery cell bracket; 13. Copper-nickel connecting piece; 14. Epoxy resin cover plate; 21. Positioning hole; 31. Positioning column; 61. Ventilation groove; 62. Upper mounting piece; 63. Lower mounting piece; 64. Reserved hole; 65. Fixing screw hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] See attached Figure 1-Figure 7 The sodium ion battery cell assembly module provided in this embodiment includes: a box body 6, a plurality of series copper bars 4, and a plurality of battery cell assemblies 1;

[0026] Each of the battery cell assemblies 1 includes two battery cell brackets 12, two copper-nickel connecting pieces 13, and a plurality of sodium ion batteries 11; each of the battery cell brackets 12 includes a plurality of mounting holes corresponding to each of the sodium ion batteries 11, and each of the sodium ion batteries 11 is mounted side by side on the battery cell brackets 12, and the opposite ends of each of the sodium ion batteries 11 are respectively arranged in the mounting holes on the two battery cell brackets 12; each of the copper-nickel connecting pieces 13 is arranged on the outside of the battery cell brackets 12, and the copper-nickel connecting pieces 13 are connected between the electrodes of each of the sodium ion batteries 11, so that the sodium ion batteries 11 are electrically connected to each other; the copper-nickel connecting pieces 13 are provided with electrode sheets for connecting the battery cell assemblies 1 in series;

[0027] The box body 6 is a rectangular box with an open top, and each battery cell assembly 1 is electrically connected in series in the box body 6; each series copper busbar 4 is fixedly arranged at the connection of each battery cell assembly 1, and its two ends are respectively fixedly connected to the electrode sheets of the copper-nickel connecting sheet 13, and the series copper busbar 4 is electrically connected to the copper-nickel connecting sheet 13 to which it is fixedly connected.

[0028] Example 2

[0029] Reference Figures 1 to 7 The sodium ion battery cell combination module provided in this embodiment is based on the above-mentioned embodiment 1, and adopts a battery cell assembly 1 of the same model and specification. The sodium ion battery cell combination module is a rectangular parallelepiped after assembly, and the positive and negative electrodes are respectively at the two ends of the sodium ion battery cell combination module;

[0030] In the present embodiment, in the sodium ion battery cell combination module composed of four battery cell assemblies 1, four battery cell assemblies 1 are assembled first; when the battery cell assemblies 1 are assembled, each battery cell assembly 1 includes two battery cell brackets 12, two copper-nickel connecting pieces 13, and twenty sodium ion battery cells 11; the battery cell bracket 12 includes twenty mounting holes corresponding to each sodium ion battery cell 11, each sodium ion battery cell 11 is mounted side by side on the battery cell bracket 12, and the opposite ends of each sodium ion battery cell 11 are respectively arranged in the mounting holes on the two battery cell brackets 12; two copper-nickel connecting pieces 13 are respectively arranged on the outer sides of the battery cell bracket 12, and the copper-nickel connecting pieces 13 are connected between the electrodes of each sodium ion battery cell 11, so that the twenty sodium ion battery cells 11 are electrically connected to each other; the copper-nickel connecting piece 13 is provided with an electrode sheet for connecting the battery cell assemblies 1 in series.

[0031] The box body 6 is a rectangular box with an open top. The width of the box body 6 matches the width of the battery cell assembly 1, and the length of the box body 6 can just hold four groups of battery cell assemblies 1; the four groups of battery cell assemblies 1 are electrically connected in series in the box body 6; each series copper busbar 4 is fixedly arranged at the connection of each battery cell assembly 1, and its two ends are respectively fixedly connected to the electrode sheets of the copper-nickel connecting sheet 13, and the series copper busbar 4 is electrically connected to the copper-nickel connecting sheet 13 to which it is fixed.

[0032] Example 3

[0033] Reference Figures 1 to 7 Based on the above-mentioned embodiments 1 and 2, in this embodiment, one side of the copper-nickel connecting sheet 13 is connected to the electrodes of each sodium ion battery cell 11 and the battery cell bracket 12, and the other side thereof is provided with an epoxy resin partition 5 for insulating and isolating the electrodes of the battery cell assembly 1.

[0034] An anti-slip protrusion is provided on one side of the mounting hole of the battery cell holder 12. The anti-slip protrusion is integrally formed with the battery cell holder 12. A portion of the anti-slip protrusion extends into the mounting hole corresponding to the sodium ion battery cell 11. The anti-slip protrusions are arranged in groups of four and are evenly distributed on the same side of the mounting hole. The anti-slip protrusions can not only play an anti-slip role, but also fix the sodium ion battery cell 11.

[0035] Both ends of each sodium ion battery cell 11 are respectively arranged in mounting holes on one side of two opposite battery cell brackets 12 without anti-slip protrusions. Such a design further improves the fixing strength of the sodium ion battery cell 11 .

[0036] The copper-nickel connecting piece 13 is arranged on the side of the battery holder 12 away from the sodium ion battery 11. The copper-nickel connecting piece 13 has a plurality of electrically connected electrical connection contacts, which are electrically connected to the poles of the sodium ion battery 11 in the corresponding mounting holes; the copper-nickel connecting piece 13 is also provided with evenly distributed heat dissipation openings. The setting of the heat dissipation openings can enable each battery cell assembly 1 to form a connected space, which is conducive to ventilation and heat dissipation.

[0037] An epoxy resin cover plate 14 is disposed on the top of each battery cell assembly 1, which can not only protect the top of the battery cell assembly 1 but also improve the waterproof and insulating effects.

[0038] A fixing pressure strip 3 is also provided at the middle position of the top surface of each battery cell assembly 1. Screw holes for bolt fixing are provided at both ends of the fixing pressure strip 3. The screw holes correspond to the fixing screw holes 65. Matching bolts penetrate the screw holes and the fixing screw holes 65 for fixed connection.

[0039] On the fixed pressure strip 3 in the middle of each battery cell assembly 1 at both ends of the box body 6 in the length direction, a positioning column 31 is also arranged. The positioning column 31 is arranged in the shape of two cylinders and is located in the middle of the fixed pressure strip 3. The positioning column 31 is arranged parallel to the fixed pressure strip 3. The height of the positioning column 31 after installation is lower than the height of the outer shell of the box body 6.

[0040] An epoxy resin top plate 2 is arranged above the box body 6, and a positioning hole 21 matching the positioning column 31 is arranged on the epoxy resin top plate 2. Through such a setting, when installing the epoxy resin top plate 2, it only needs to align the positioning hole 21 with the positioning column 31 to install it in place, which greatly simplifies the installation steps.

[0041] Multiple ventilation slots 61 are provided on both sides of the box body 6 in the length direction. The heat dissipation openings provided on the copper-nickel connecting sheet 13 and the ventilation slots 61 of the box body 6 cooperate with each other, further improving the ventilation and heat dissipation performance of the sodium ion battery cell combination module.

[0042] An upper mounting member 62 and a lower mounting member 63 are also provided at both ends of the box body 6 in the length direction. The arrangement of the upper mounting member 62 and the lower mounting member 63 facilitates the standardized expansion and installation of the sodium ion battery cell combination module.

[0043] A plurality of reserved holes 64 are also provided on the top of both sides in the length direction of the box body 6. The reserved holes 64 can be used for hoisting the battery cell assembly module and can also be used to install auxiliary equipment such as a cooling fan, a protection controller, etc.

[0044] In summary, the above embodiments of the utility model focus on simplifying the overall structural design through various structural improvements, setting up battery cell components, series copper bars and other components, and improving the stability of use; opening multiple heat dissipation slots to facilitate the unified heat dissipation of the battery cell combination module; unifying the specifications and dimensions of the battery cell components, and being able to standardize and expand; and improving the setting of the electrode sheet on the copper-nickel connecting sheet to improve the assembly efficiency of the combination module. The utility model improves the battery cell components, and the battery cell bracket is used in conjunction with the battery cells, so that the combination module is easy to be quickly assembled and disassembled when connected in series. The box body and the battery cell components are matched to avoid problems such as battery cell collision and deformation due to improper placement of the battery cell components. The utility model improves the fixed pressure strips and adds positioning columns, which facilitates the connection between the box body and the epoxy resin top plate, saves the positioning process, and ensures that the epoxy resin top plate is not easy to fall off. The utility model improves the ventilation and heat dissipation structure in multiple places to avoid the problem of the temperature increase of the battery cell components caused by the box body being too long and not ventilated, and further improves the safety of the use of the sodium ion battery cell combination module. The novel structure is improved in many aspects, and standardized copper-nickel connecting pieces are adopted, and electrode pieces of uniform specifications are arranged, so that the series connection and parallel connection of the combined modules are very simple.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sodium ion battery cell assembly module, characterized in that: It comprises a box body (6), a plurality of copper bars (4) connected in series, and a plurality of battery core assemblies (1); Each of the battery cell assemblies (1) comprises two battery cell brackets (12), two copper-nickel connecting sheets (13), and a plurality of sodium ion battery cells (11); each of the battery cell brackets (12) comprises a plurality of mounting holes corresponding to each of the sodium ion battery cells (11); each of the sodium ion battery cells (11) is mounted side by side on the battery cell brackets (12), and opposite ends of each of the sodium ion battery cells (11) are respectively arranged in the mounting holes on the two battery cell brackets (12); each of the copper-nickel connecting sheets (13) is arranged on the outside of the battery cell brackets (12), and the copper-nickel connecting sheets (13) are connected between the electrodes of each of the sodium ion battery cells (11), so that each of the sodium ion battery cells (11) is electrically connected to each other; and an electrode sheet for connecting the battery cell assemblies (1) in series is arranged on the copper-nickel connecting sheets (13); The box body (6) is in the shape of a rectangular box with an open top, and each battery cell assembly (1) is electrically connected in series within the box body (6); each series copper busbar (4) is fixedly arranged at the connection point of each battery cell assembly (1), and its two ends are respectively fixedly connected to the electrode sheets of the copper-nickel connecting sheet (13), and the series copper busbar (4) is electrically connected to the copper-nickel connecting sheet (13) to which it is fixedly connected.

2. The sodium ion battery cell assembly module according to claim 1, characterized in that: One side of the copper-nickel connecting sheet (13) is connected to the electrodes of each sodium ion battery cell (11) and the battery cell support (12), and the other side thereof is provided with an epoxy resin separator (5).

3. The sodium ion battery cell assembly module according to claim 1, characterized in that: An anti-slip tab is provided on one side of the mounting hole of the battery cell holder (12), the anti-slip tab is integrally formed with the battery cell holder (12), a portion of the anti-slip tab extends out to the mounting hole corresponding to the sodium ion battery cell (11), and the anti-slip tabs are arranged in groups of four and are evenly distributed on the same side of the mounting hole.

4. The sodium ion battery cell assembly module according to claim 3, characterized in that: Both ends of each sodium ion battery cell (11) are respectively arranged in mounting holes on one side of two opposite battery cell brackets (12) not provided with anti-slip protrusions.

5. The sodium ion battery cell assembly module according to claim 1, characterized in that: The copper-nickel connecting sheet (13) is arranged on a side of the battery support (12) away from the sodium ion battery (11), and the copper-nickel connecting sheet (13) has a plurality of electrically connected electrical connection contacts, and the electrical connection contacts are electrically connected to the poles of the sodium ion battery (11) in the corresponding mounting holes; the copper-nickel connecting sheet (13) is also provided with evenly distributed heat dissipation openings.

6. The sodium ion battery cell assembly module according to claim 1, characterized in that: An epoxy resin cover plate (14) is provided on the top of each battery cell assembly (1).

7. The sodium ion battery cell assembly module according to claim 1, characterized in that: A fixing pressure strip (3) is also provided at the middle of the top surface of each battery cell assembly (1), and screw holes for bolt fixing are provided at both ends of the fixing pressure strip (3), and the screw holes correspond to the fixing screw holes (65) provided on the box body (6).

8. The sodium ion battery cell assembly module according to claim 7, characterized in that: Positioning columns (31) are also provided on the fixed pressure strips (3) in the middle of each battery cell assembly (1) at both ends of the box body (6) in the length direction. The positioning columns (31) are configured as two cylindrical shapes and are located in the middle of the fixed pressure strips (3).

9. The sodium ion battery cell assembly module according to claim 8, characterized in that: An epoxy resin top plate (2) is arranged above the box body (6), and a positioning hole (21) matching the positioning column (31) is arranged on the epoxy resin top plate (2).

10. The sodium ion battery cell assembly module according to any one of claims 1 to 9, characterized in that: Both sides of the box body (6) in the length direction are provided with a plurality of ventilation slots (61) for modular heat dissipation; and both ends of the box body (6) in the length direction are also provided with an upper mounting member (62) and a lower mounting member (63) for modular expansion and installation of the sodium ion battery cell assembly module.

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