Cylindrical battery module
By setting up a connecting strip and a lower bracket smoke exhaust channel in the isolation wall in the cylindrical battery module, the short circuit and thermal runaway diffusion problems during the production process are solved, and the effect of safe production and preventing heat diffusion is achieved.
Patent Information
- Application Number
- CN202421898742.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-07
AI Technical Summary
Existing cylindrical battery modules are prone to short circuits in the positive and negative electrodes during the production process, and high-temperature flue gases are likely to have thermal impact on the surrounding batteries when the heat is out of control, and there is a risk of thermal diffusion.
A cylindrical battery module structure is designed, in which the connecting rows are arranged in the isolation wall, and the adjacent connecting rows are in an independent space to avoid overlapping of positive and negative electrodes; the protruding side of the lower bracket forms a smoke exhaust channel, and high-temperature flue gas is discharged through the channel to avoid heat diffusion.
It effectively avoids short circuits during the production process, and prevents the thermal impact of high-temperature flue gas on the surrounding batteries when the heat is out of control, prevents the occurrence of heat diffusion, and improves safety and stability.
Smart Images
Figure CN223052243U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cylindrical battery structures, and particularly relates to a cylindrical battery module. Background Art
[0002] Lithium-ion or sodium-ion batteries have the advantages of light weight, large energy storage, high power, no pollution, long life, small self-discharge coefficient, and wide temperature adaptation range. Therefore, they are gradually favored by people and have gradually replaced other traditional batteries in the fields of energy storage and power batteries.
[0003] Cylindrical batteries have the characteristics of high production efficiency, low production cost, and good product consistency. Compared with traditional cylindrical batteries with pole columns at both ends, cylindrical batteries with positive and negative electrodes at one end have the advantages of simple structure, high module assembly and welding efficiency. Generally speaking, the pole column of the cover plate assembly is of the first polarity, and the light cover plate of the cover plate assembly is of the second polarity. Since both the first polarity and the second polarity are on the cover plate assembly and the distance is relatively close, during the assembly and welding process of the connection row, the connection row is very likely to overlap on the first polarity and the second polarity, resulting in a dangerous situation of short circuit; for cylindrical batteries, when the module undergoes thermal runaway, the high-temperature flue gas ejected from the explosion-proof valve is very likely to cause thermal influence on the surrounding batteries, and even cause the spread of runaway of the surrounding batteries, posing a risk of fire and explosion to the system. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a cylindrical battery module, which can avoid the short-circuit situation caused by the overlap of the positive and negative electrodes during the placement and welding of the connection row, ensure the safety of the production process, and at the same time avoid the thermal influence of the high-temperature flue gas on the surrounding batteries during the thermal runaway of the cylindrical battery and prevent the occurrence of thermal diffusion.
[0005] The purpose of the utility model is realized as follows: a cylindrical battery module is composed of a lower bracket, cylindrical batteries, an upper bracket and a connection row. A plurality of first battery receiving grooves are arranged on the back surface of the upper bracket, and a first polarity receiving groove and a second polarity receiving groove are arranged on the supporting surface at the bottom of the first battery receiving groove; an isolation wall is arranged on the front surface of the upper bracket, and the isolation wall surrounds the first polarity receiving groove and the second polarity receiving groove and separates the first polarity receiving groove from the second polarity receiving groove;
[0006] The connection row is arranged within the isolation wall, and adjacent first connection row plates and second connection row plates are respectively within the independent spaces surrounded by the isolation wall, which can avoid the short-circuit situation caused by the overlap of the positive and negative electrodes during the placement and welding process of the connection row and ensure the safety of the production process;
[0007] The front of the lower bracket is provided with a plurality of second battery accommodation grooves, and the back of the lower bracket is provided with raised vertical edges corresponding to the second battery accommodation grooves. The raised vertical edges are provided with vertical edge openings, and the gaps between adjacent raised vertical edges form a smoke exhaust channel; when the cylindrical battery undergoes thermal runaway, the high-temperature flue gas is discharged from the module through the smoke exhaust channel.
[0008] Further, the cylindrical battery is composed of a cover plate assembly and a housing, and the cover plate assembly is composed of a pole column, a first explosion-proof valve, and a light cover plate.
[0009] Further, one end of the cylindrical battery is arranged in the first battery accommodation groove, and the other end is arranged in the second battery accommodation groove. The upper bracket is assembled on one side of the first explosion-proof valve on the cylindrical battery.
[0010] Further, a second explosion-proof valve is arranged on the bottom of the housing of the cylindrical battery, and the lower bracket is assembled on one side of the second explosion-proof valve on the cylindrical battery.
[0011] Further, a first explosion-proof valve through groove is also arranged on the supporting surface at the bottom of the battery accommodation groove.
[0012] Further, the first battery accommodation grooves are arranged at equal intervals along the X-axis, and adjacent two columns of the first battery accommodation grooves arranged along the X-axis are staggered in the Y-axis direction; the positions of the second battery accommodation grooves correspond to those of the first battery accommodation grooves one by one.
[0013] Further, a plurality of upper bracket connection points are arranged on the back of the upper bracket, and a plurality of lower bracket connection points are arranged on the front of the lower bracket. The upper bracket connection points and the lower bracket connection points are connected by screws.
[0014] Further, the overall outer shapes of the upper bracket and the lower bracket are both rectangular structures, and the upper bracket and the lower bracket are both made of insulating materials.
[0015] Advantages of the present utility model: A cylindrical battery module of the present utility model, by arranging the connection row within the partition wall, the adjacent first connection row plate and the second connection row plate are respectively within the independent space surrounded by the partition wall, which can avoid the short - circuit situation caused by the positive and negative electrodes overlapping during the placement and welding processes of the connection row, ensuring the safety of the production process; by arranging a raised edge on the back of the lower bracket, and arranging an edge opening on the raised edge, the gap between adjacent raised edges forms a smoke exhaust channel; when a cylindrical battery undergoes thermal runaway, the raised edge can provide an opening space for the second explosion - proof valve, and the edge opening is exactly opposite to the gap formed by two adjacent battery raised edges, forming a smoke exhaust channel, and the high - temperature flue gas is discharged from the module through the smoke exhaust channel. The edge opening and the raised edge can prevent the high - temperature flue gas from having a thermal impact on the batteries around the thermal runaway, avoiding the occurrence of thermal diffusion. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The explosion diagram of the cylindrical battery module of the present utility model is shown.
[0017] Figure 2 The schematic diagram of the cylindrical battery cover plate assembly of the present utility model is shown.
[0018] Figure 3 The schematic diagram of the second explosion - proof valve of the cylindrical battery housing of the present utility model is shown.
[0019] Figure 4 The schematic diagram of the back of the upper bracket of the present utility model is shown.
[0020] Figure 5 The schematic diagram of the front of the upper bracket of the present utility model is shown.
[0021] Figure 6 The schematic diagram of the assembly of the upper bracket of the present utility model is shown.
[0022] Figure 7 Shown as Figure 6 The enlarged schematic diagram of the partial area A in
[0023] Figure 8 The schematic diagram of the front of the lower bracket of the present utility model is shown.
[0024] Figure 9 The schematic diagram of the back of the lower bracket of the present utility model is shown.
[0025] Figure 10 The schematic diagram of the assembly of the lower bracket of the present utility model is shown.
[0026] Figure 11 Shown as Figure 10 The enlarged schematic diagram of the partial area B in DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.
[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.
[0029] It should be noted that all directional indications (such as up-down-left-right-front-back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. The connection can be a direct connection or an indirect connection.
[0030] As Figure 1-11 shown, a cylindrical battery module is composed of a lower bracket 2, cylindrical batteries 3, an upper bracket 4, and a connection row 5. A plurality of first battery receiving grooves 4-1 are provided on the back surface of the upper bracket 4. A first polarity receiving groove 4-4 and a second polarity receiving groove 4-5 are provided on the supporting surface 4-3 at the bottom of the first battery receiving groove 4-1; an isolation wall 4-7 is provided on the front surface of the upper bracket 4. The isolation wall 4-7 surrounds the first polarity receiving groove 4-4 and the second polarity receiving groove 4-5 and separates the first polarity receiving groove 4-4 from the second polarity receiving groove 4-5;
[0031] The connection row 5 is arranged within the isolation wall 4-7. The adjacent first connection row plates 5-1 and second connection row plates 5-2 are respectively within the independent spaces surrounded by the isolation wall 4-7, which can avoid the short-circuit situation caused by the positive and negative poles of the connection row 5 being overlapped during the placement process and the welding process, and ensure the safety of the production process;
[0032] A plurality of second battery receiving grooves 2-1 are provided on the front surface of the lower bracket 2. A convex vertical edge 2-3 corresponding to the second battery receiving groove 2-1 is provided on the back surface of the lower bracket 2. An edge opening 2-4 is provided on the convex vertical edge 2-3. The gap between adjacent convex vertical edges 2-3 forms a smoke exhaust channel 2-5; when the cylindrical battery 3 undergoes thermal runaway, the high-temperature flue gas is discharged from the module through the smoke exhaust channel 2-5. The edge opening 2-4 and the convex vertical edge 2-3 can avoid the thermal influence of the high-temperature flue gas on the batteries around the thermal runaway and prevent the occurrence of thermal diffusion.
[0033] Further, in one embodiment, the cylindrical battery 3 is composed of a cover plate assembly 3-1 and a housing 3-2. The cover plate assembly 3-1 is composed of a pole 3-3, a first explosion-proof valve 3-4, and a light cover plate 3-5. The pole 3-3 is the first polarity of the cylindrical battery 3, and the light cover plate 3-5 is the second polarity of the cylindrical battery 3.
[0034] Further, in one embodiment, one end of the cylindrical battery 3 is disposed in the first battery receiving groove 4-1, and the other end is disposed in the second battery receiving groove 2-1. The upper bracket 4 is assembled on one side of the first explosion-proof valve 3-4 on the cylindrical battery 3.
[0035] Further, in one embodiment, a second explosion-proof valve 3-7 is provided on the bottom 3-6 of the housing of the cylindrical battery 3. The lower bracket 2 is assembled on one side of the second explosion-proof valve 3-7 on the cylindrical battery 3.
[0036] Further, in one embodiment, a first explosion-proof valve through groove 4-6 is further provided on the support surface 4-3 at the bottom of the battery receiving groove 4-1, allowing the first explosion-proof valve 3-4 on the cylindrical battery 3 to extend through the support surface 4-3 at the bottom of the battery receiving groove 4-1, so that high-temperature flue gas can be smoothly discharged when the cylindrical battery 3 undergoes thermal runaway.
[0037] Further, in one embodiment, the first battery receiving grooves 4-1 are arranged at equal intervals along the X-axis, and adjacent two columns of the first battery receiving grooves 4-1 arranged along the X-axis are arranged in a staggered manner in the Y-axis direction; the second battery receiving grooves 2-1 correspond to the positions of the first battery receiving grooves 4-1 one by one; the edge openings 2-4 provided on the raised edges 2-3 can exactly face the smoke exhaust channels 2-5 formed by the gaps between two adjacent raised edges 2-3, so as to ensure that high-temperature flue gas can be quickly discharged when the cylindrical battery 3 undergoes thermal runaway.
[0038] Further, in one embodiment, a plurality of upper bracket connection points 4-2 are provided on the back surface of the upper bracket 4, and a plurality of lower bracket connection points 2-2 are provided on the front surface of the lower bracket 2. The upper bracket connection points 4-2 and the lower bracket connection points 2-2 are connected by a screw 1, thereby connecting the upper bracket 4 and the lower bracket 2 together to ensure the stability of the overall structure of the battery module.
[0039] Further, in one embodiment, the overall outer shapes of the upper bracket 4 and the lower bracket 2 are both rectangular structures, and the upper bracket 4 and the lower bracket 2 are both made of insulating materials.
[0040] In summary, for a cylindrical battery module of the present utility model, by arranging the connection row 5 within the partition wall 4-7, the adjacent first connection row plate 5-1 and the second connection row plate 5-2 are respectively in the independent space surrounded by the partition wall 4-7, which can avoid the short-circuit situation caused by the positive and negative poles of the connection row 5 being overlapped during the placement and welding processes, ensuring the safety of the production process; by providing a raised edge 2-3 on the back of the lower bracket 2 and a raised-edge opening 2-4 on the raised edge 2-3, the gaps between adjacent raised edges 2-3 form a smoke exhaust channel 2-5; when a thermal runaway occurs in the cylindrical battery 3, the raised edge 2-3 can provide an opening space for the second explosion-proof valve 3-7, and the raised-edge opening 2-4 is exactly opposite to the gap formed by two adjacent battery raised edges 2-3, forming a smoke exhaust channel. The high-temperature flue gas is discharged from the module through the smoke exhaust channel 2-5. The raised-edge opening 2-4 and the raised edge 2-3 can prevent the high-temperature flue gas from having a thermal impact on the batteries around the thermal runaway and avoid the occurrence of thermal diffusion.
[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0042] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.
Claims
1. A cylindrical battery module, comprising a lower bracket (2), a cylindrical battery (3), an upper bracket (4) and a connecting row (5), characterized in that: A plurality of first battery accommodating grooves (4-1) are arranged on the back of the upper bracket (4), and a first polarity accommodating groove (4-4) and a second polarity accommodating groove (4-5) are arranged on the support surface (4-3) at the bottom of the first battery accommodating groove (4-1); an isolation wall (4-7) is arranged on the front of the upper bracket (4), and the isolation wall (4-7) surrounds the first polarity accommodating groove (4-4) and the second polarity accommodating groove (4-5) and separates the first polarity accommodating groove (4-4) from the second polarity accommodating groove (4-5); The connecting row (5) is arranged in the isolation wall (4-7), and the adjacent first connecting row plates (5-1) and second connecting row plates (5-2) are respectively in independent spaces surrounded by the isolation wall (4-7); The front side of the lower bracket (2) is provided with a plurality of second battery receiving slots (2-1), the back side of the lower bracket (2) is provided with raised vertical edges (2-3) corresponding to the second battery receiving slots (2-1), the raised vertical edges (2-3) are provided with vertical edge openings (2-4), and the gaps between adjacent raised vertical edges (2-3) form a smoke exhaust channel (2-5).
2. A cylindrical battery module according to claim 1, characterized in that: The cylindrical battery (3) is composed of a cover plate assembly (3-1) and a shell (3-2); the cover plate assembly (3-1) is composed of a pole (3-3), a first explosion-proof valve (3-4) and a light cover plate (3-5).
3. A cylindrical battery module according to claim 2, characterized in that: One end of the cylindrical battery (3) is arranged in the first battery receiving groove (4-1), and the other end is arranged in the second battery receiving groove (2-1), and the upper bracket (4) is assembled on one side of the first explosion-proof valve (3-4) on the cylindrical battery (3).
4. A cylindrical battery module according to claim 1, characterized in that: A second explosion-proof valve (3-7) is provided on the bottom (3-6) of the shell of the cylindrical battery (3), and the lower bracket (2) is assembled on one side of the second explosion-proof valve (3-7) on the cylindrical battery (3).
5. A cylindrical battery module according to claim 2, characterized in that: A first explosion-proof valve penetration groove (4-6) is also provided on the support surface (4-3) at the bottom of the battery containing groove (4-1).
6. A cylindrical battery module according to claim 1, characterized in that: The first battery receiving slots (4-1) are arranged equidistantly along the X-axis, and two adjacent rows of the first battery receiving slots (4-1) arranged along the X-axis are arranged in a staggered manner along the Y-axis; and the positions of the second battery receiving slots (2-1) and the first battery receiving slots (4-1) correspond one to one.
7. A cylindrical battery module according to claim 1, characterized in that: A plurality of upper bracket connection points (4-2) are arranged on the back of the upper bracket (4), a plurality of lower bracket connection points (2-2) are arranged on the front of the lower bracket (2), and the upper bracket connection points (4-2) and the lower bracket connection points (2-2) are connected via screw rods (1).
8. The cylindrical battery module according to claim 1, characterized in that: The overall appearance of the upper bracket (4) and the lower bracket (2) are both rectangular structures, and the upper bracket (4) and the lower bracket (2) are both made of insulating materials.