Welding-free buffer heat dissipation energy storage battery system

Abstract

The utility model relates to the technical field of electric energy storage systems, and particularly discloses a welding-free buffer heat-dissipation energy storage battery system, which comprises an upper box body, a lower box body, a plurality of battery cells in the upper box body and the lower box body, a probe press-fitting module pressed above the plurality of battery cells, and a heat dissipation module pressed above the probe press-fitting module, the bottom of the probe press-fitting module is uniformly connected with the probe assemblies, and the plurality of groups of probe assemblies and the probe press-fitting module are integrally formed. According to the utility model, the extension, the connecting plate, the confluence plate and the probe assembly are integrally formed, fixing bolts in the prior art are omitted, and when the whole system is assembled, the confluence bridge does not need to be connected by loosening and tightening fixing nuts one by one, so that the connection between the probe assembly and the battery cell pole is more convenient and faster, the operation steps are saved, and the production efficiency is improved. And meanwhile, the occupied space of the whole system is also reduced by removing the fixing nut.

Description

Technical Field

[0001] The utility model belongs to the technical field of power energy storage systems, and particularly relates to a welding-free buffer heat dissipation energy storage battery system. Background Art

[0002] Electrochemical energy storage systems can store and release electric energy between the power generation side, the grid side, and the user side, and have functions such as peak shaving and valley filling, peak regulation and frequency modulation, and coordinating the grid connection of new energy power generation. Among them, lithium battery systems are the main application direction of electrochemical energy storage. The traditional energy storage system solutions are generally composed of levels of module (module), pack (battery pack), Rack (battery rack), and container systems. Among them, the basic application directions of traditional battery modules such as module and pack all adopt the welding method of busbars and cell pole columns. The existing battery energy storage processing methods not only consume a large amount of lead raw materials, but also are prone to problems such as chip dropping and poor welding such as poor soldering; in addition, the current energy storage system assembly process is complex, product maintenance is difficult, and it is difficult to recycle after the end of life, and the investment cost is high.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term explorations and proposed various solutions. For example, the Chinese patent document discloses a welding-free energy storage battery system CN116742279A, which includes a lower tray. An inner circumferential side of the lower tray forms a cell loading cavity, and a cell group is loaded in the cell loading cavity. A thimble structure that is electrically connected to each other is provided on an upper end surface of the cell group. The upper end surface of the lower tray is closed by an upper cover assembly, and a probe assembly corresponding to the thimble structure one by one is provided in the upper cover assembly. Two adjacent probe assemblies are connected by a busbar, and the busbar is connected to a sampling assembly.

[0004] The above solution breaks the inherent form of the original battery pack and module to a certain extent, but this solution still has many deficiencies. For example: the connection between the probe assembly, the busbar, and the sampling assembly requires tightening and loosening fixing bolts. Such a connection method requires frequently tightening and loosening the fixing nuts on several probe assemblies, making the connection process between the probe assembly and the cell pole column more cumbersome, not only increasing the workload, but also increasing the occupied space of the entire system. Summary of the Utility Model

[0005] In view of the problem that the connection between the probe assembly, the busbar, and the sampling assembly in the welding-free energy storage battery system in the existing technology requires frequently tightening and loosening fixing bolts, increasing the workload, the utility model proposes the following technical solutions:

[0006] A welding-free buffer heat dissipation energy storage battery system includes an upper box body and a lower box body, and a plurality of cells in the upper box body and the lower box body, and further includes:

[0007] Probe pressing module, the probe pressing module presses above a number of battery cells;

[0008] Probe assembly, the bottom of the probe pressing module is evenly connected with probe assemblies, and several groups of probe assemblies are integrally formed with the probe pressing module.

[0009] As a preference of the above technical solution, the probe assembly includes a fixing plate, the fixing plate is connected to the probe pressing module, the other side of the fixing plate is fixed with a connecting rod, and the other end of the connecting rod is fixed with a probe. Among them, a spring is installed between the fixing plate and the probe and at a position corresponding to the periphery of the connecting rod.

[0010] As a preference of the above technical solution, one end of the probe is provided with a concave arc groove, which matches the battery cell pole on the battery cell. The external dimension of the arc groove is slightly larger than the external dimension of the battery cell pole and covers the battery cell pole.

[0011] As a preference of the above technical solution, the probe pressing module includes an extension, a connecting plate and a busbar plate. The extension is equivalent to the bracket in the prior art, and the connecting plate is equivalent to the sampling assembly in the prior art, which is composed of a sampling plate and several lugs on both sides. The busbar plate is fixed on two adjacent lugs on the same side of the connecting plate. The fixing plate is fixedly connected to the busbar plate, and the fixing plate corresponds to the lugs at the corresponding positions one by one.

[0012] As a preference of the above technical solution, studs are longitudinally fixed at the four corners of the inner cavity of the lower box. The studs penetrate through the corresponding positions of the extension, and the studs at the corresponding positions are fixed by nuts.

[0013] As a preference of the above technical solution, a serpentine cooling tube is installed between two adjacent groups of battery cells.

[0014] As a preference of the above technical solution, the serpentine cooling tube includes several first cooling tubes and a group of second cooling tubes. The several first cooling tubes are connected to the second cooling tube. The first cooling tubes are located between two adjacent groups of battery cells, and the second cooling tube is located at the bottom of the inner cavity of the lower box to support several groups of battery cells. The head and tail ends of the second cooling tube are respectively connected with a liquid inlet pipe and a liquid discharge pipe.

[0015] As a preference of the above technical solution, the gap between the first cooling tube and the battery cell is filled with a heat-conducting gel.

[0016] The beneficial effects of the present utility model are:

[0017] In the present utility model, the epitaxial layer, the connecting plate, the bus bar and the probe assembly are integrally formed, eliminating the fixing bolts in the prior art. When assembling the entire system, there is no need to connect the bus bar bridge one by one by tightening and loosening the fixing nuts, making the connection between the probe assembly and the cell pole column more convenient and fast, saving operation steps, reducing the workload, and at the same time removing the fixing nuts also reduces the occupied space of the entire system. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the internal structure of the present utility model;

[0019] Figure 2 It is a schematic diagram of the probe and the probe pressing module mechanism;

[0020] Figure 3 It is a schematic diagram of the probe structure;

[0021] Figure 4 It is a schematic diagram of the internal sectional structure of the present utility model;

[0022] Figure 5 It is an enlarged schematic diagram of part A;

[0023] Figure 6 It is a schematic diagram of the cooling system structure;

[0024] Figure 7 It is a side sectional view of the cooling system;

[0025] Figure 8 It is a schematic diagram of the external structure of the present utility model.

[0026] In the figure:

[0027] 1. Upper box body; 2. Lower box body; 3. Cell; 31. Cell pole column; 4. Probe pressing module; 41. Epitaxial layer; 42. Connecting plate; 43. Bus bar; 5. Probe assembly; 51. Fixed plate; 52. Connecting rod; 53. Probe; 531. Arc groove; 54. Spring; 6. Stud; 61. Nut; 7. Serpentine cooling pipe; 71. First cooling pipe; 72. Second cooling pipe; 73. Liquid inlet pipe; 74. Liquid discharge pipe; 8. Thermal conductive gel. Detailed Embodiments

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Embodiment

[0029] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , and Figure 8As shown in the figure, a solderless buffered heat dissipation energy storage battery system includes an upper box body 1 and a lower box body 2, and a number of battery cells 3 inside the upper box body 1 and the lower box body 2. It also includes a probe pressing module 4, which is pressed above the number of battery cells 3. Among them, the bottom of the probe pressing module 4 is evenly connected with probe assemblies 5, and several groups of probe assemblies 5 are integrally formed with the probe pressing module 4. By using the probe assemblies 5 to contact the cell poles 31 on the battery cells 3, the purpose of circuit connection is achieved.

[0030] During specific use, place the probe pressing module 4 above the number of battery cells 3, so that the probe assemblies 5 at each position contact the cell poles 31 on the corresponding battery cells 3.

[0031] The advantages of the present utility model are as follows: On the basis of the prior art, the fixing nuts at the connection between the probe pressing module 4 and the probe assemblies 5 are removed, making the connection between the probe assemblies 5 and the cell poles 31 more convenient and rapid, saving operation steps, reducing the workload, and at the same time removing the fixing nuts also reduces the occupied space of the entire system.

[0032] Furthermore, the probe assembly 5 includes a fixing plate 51, the fixing plate 51 is connected to the probe pressing module 4, the other side of the fixing plate 51 is fixed with a connecting rod 52, and the other end of the connecting rod 52 is fixed with a probe 53. Among them, a spring 54 is installed between the fixing plate 51 and the probe 53 and at a position corresponding to the periphery of the connecting rod 52. Among them, one end of the probe 53 is provided with an inward concave arc groove 531, which is matched with the cell pole 31 on the battery cell 3. The outer dimension of the arc groove 531 is slightly larger than the outer dimension of the cell pole 31 and covers the cell pole 31. Different from the previous planar probe, the contact part of this probe 53 and the cell pole 31 is an inward concave arc structure, thus avoiding relative sliding between the probe 53 and the cell pole 31 during severe shaking, and ensuring the firmness of the contact between the pole and the probe.

[0033] Furthermore, the probe pressing module 4 includes an extension 41, a connecting plate 42, and a bus bar 43. The extension 41 is equivalent to the bracket in the prior art, the connecting plate 42 is equivalent to the sampling component in the prior art, which consists of a sampling plate and several lugs on both sides. The bus bar 43 is fixed on two adjacent lugs on the same side of the connecting plate 42. The fixing plate 51 is fixedly connected to the bus bar 43, and the fixing plate 51 corresponds to the lugs at the corresponding positions one by one. In this way, the connecting plate 42, the bus bar 43, and the probe assembly 5 are fixedly connected, removing the existing fixing nuts. When assembling the entire system, there is no need to connect the bus bar bridge one by one by loosening and tightening the fixing nuts, saving operation steps and the space of the entire system.

[0034] Furthermore, studs 6 are longitudinally fixed at the four corners of the inner cavity of the lower box body 2. The studs 6 penetrate through the corresponding positions of the outer extension 41, and the studs 6 at the corresponding positions are fixed by nuts 61. Such a connection method is relatively simple and convenient to operate.

[0035] As Figures 6 - 8 shown, a serpentine cooling pipe 7 is installed between two adjacent groups of battery cells 3. The serpentine cooling pipe 7 includes a plurality of first cooling pipes 71 and a group of second cooling pipes 72. The plurality of first cooling pipes 71 are connected to the second cooling pipes 72. The first cooling pipes 71 are located between two adjacent groups of battery cells 3, and the second cooling pipes 72 are located at the bottom of the inner cavity of the lower box body 2 to support several groups of battery cells 3. The head and tail ends of the second cooling pipes 72 are respectively connected with a liquid inlet pipe 73 and a liquid discharge pipe 74. The first cooling pipes 71 and the second cooling pipes 72 are used to cool the space between two adjacent battery cells 3 and the bottom of the battery cells 3 respectively, effectively restricting the expansion of the battery cells 3 and improving the service performance of the battery cells 3.

[0036] Furthermore, the gap between the first cooling pipes 71 and the battery cells 3 is filled with a heat-conducting gel 8. The heat-conducting gel 8 can play a certain buffering role, absorb the pressure generated by the expansion of the battery cells 3, and enable the battery cells 3 to be in a stable external pressure environment, thereby improving the service performance of the battery cells 3.

[0037] Working principle: Place the probe pressing module 4 above several battery cells 3, so that the studs 6 pass through the outer extension 41. At the same time, make the probes 53 on the probe assembly 5 contact the battery cell poles 31 on the battery cells 3 at the corresponding positions to achieve electrical connection, and then screw the nuts 61 onto the studs 6 to fix the probe pressing module 4.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them.

Claims

1. A solder-free buffered heat dissipation energy storage battery system, comprising an upper box body (1) and a lower box body (2), and a plurality of battery cells (3) inside the upper box body (1) and the lower box body (2), characterized in that, It further includes: A probe press-fitting module (4) which presses above a plurality of battery cells (3); A probe assembly (5), the bottom of the probe press-fitting module (4) is uniformly connected with the probe assembly (5), and several groups of probe assemblies (5) are integrally formed with the probe press-fitting module (4).

2. The solderless buffer heat dissipation energy storage battery system according to claim 1, wherein, The probe assembly (5) includes a fixing plate (51), the fixing plate (51) is connected to the probe press-fitting module (4), a connecting rod (52) is fixed on the other side of the fixing plate (51), the other end of the connecting rod (52) is fixed with a probe (53). Among them, a spring (54) is installed between the fixing plate (51) and the probe (53) and at a position corresponding to the periphery of the connecting rod (52).

3. The solderless buffer heat dissipation energy storage battery system according to claim 2, wherein One end of the probe (53) is provided with an inwardly concave arc groove (531) which is matched with the battery cell pole (31) on the battery cell (3). The outer dimension of the arc groove (531) is slightly larger than the outer dimension of the battery cell pole (31) and covers the battery cell pole (31).

4. The solderless buffer heat dissipation energy storage battery system according to claim 3, wherein The probe press-fitting module (4) includes an extension (41), a connecting plate (42) and a bus bar plate (43). The extension (41) is equivalent to the bracket in the prior art, the connecting plate (42) is equivalent to the sampling assembly in the prior art and is composed of a sampling plate and several lugs on both sides. The bus bar plate (43) is fixed on two adjacent lugs on the same side of the connecting plate (42). The fixing plate (51) is fixedly connected to the bus bar plate (43), and the fixing plate (51) corresponds to the lugs at the corresponding positions one by one.

5. The solderless buffer heat dissipation energy storage battery system according to claim 4, characterized in that Four corners of the inner cavity of the lower box body (2) are longitudinally fixed with studs (6), the studs (6) penetrate through the corresponding positions of the extension (41), and the studs (6) at the corresponding positions are fixed by nuts (61).

6. The solderless buffer heat dissipation energy storage battery system according to claim 5, wherein, A serpentine cooling pipe (7) is installed between two adjacent groups of battery cells (3).

7. The solderless buffer heat dissipation energy storage battery system according to claim 6, wherein The serpentine cooling pipe (7) includes a plurality of first cooling pipes (71) and a group of second cooling pipes (72). The plurality of first cooling pipes (71) are connected to the second cooling pipe (72). The first cooling pipes (71) are located between two adjacent groups of battery cells (3), and the second cooling pipe (72) is located at the bottom of the inner cavity of the lower box body (2) to support several groups of battery cells (3). The head and tail ends of the second cooling pipe (72) are respectively connected with a liquid inlet pipe (73) and a liquid discharge pipe (74).

8. The solderless buffer heat dissipation energy storage battery system according to claim 7, wherein, The gap between the first cooling pipe (71) and the battery cell (3) is filled with a heat-conducting gel (8).

Images