Annular battery module structure and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses an annular battery module structure and a battery pack, and the annular battery module structure comprises a plurality of fan-shaped units. The annular battery module structure of the structure is formed by arranging a plurality of fan-shaped units along an annular path, all batteries in the annular battery module structure are located between two supporting frames, the environments where different batteries are located are the same, and the exposed surfaces of the different batteries are the same; the temperature difference between the batteries at different positions in the annular battery module structure can be effectively reduced, the thermal runaway risk of the batteries is reduced, the service lives of the batteries and the battery module are prolonged, and the fire risk is reduced, so that the personal safety and the property safety are guaranteed. Meanwhile, each battery is located between the two supporting frames, the stress of the batteries at different positions is the same, and the consistency of the batteries in the aging process is good. The adjacent batteries are separated by the support frame, so that the thermal runaway area range can be reduced when the local batteries are in thermal runaway.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a ring-shaped battery module structure and a battery pack. Background Art

[0002] The existing battery module or battery pack grouping method is generally to stack square batteries or soft-pack batteries in parallel to form a square battery module structure. This grouping method results in different exposed surfaces of batteries in different locations in the module or battery pack, which will lead to differences in heat exchange between batteries, and also differences in heat exchange between batteries and the environment, which will lead to large temperature differences between batteries at different locations in the module or battery pack.

[0003] The large temperature difference between batteries results in a relatively short life of the batteries with high temperatures in the battery module. At the same time, high temperature can cause the positive and negative electrodes of the battery to come into direct contact and short-circuit, releasing a large amount of gas and heat inside the battery, causing the internal pressure of the battery to increase rapidly, thus causing thermal runaway phenomena such as battery bulging and rupture, increasing the risk of fire and causing high risks to personal and property safety.

[0004] At the same time, differences in battery temperature will inevitably lead to differences in stress. Batteries with high temperatures will expand more, the stress will increase, and the stress on the batteries will be uneven, resulting in poor consistency of batteries at different positions during the aging process. Utility Model Content

[0005] In view of this, the utility model provides a ring-shaped battery module structure and a battery pack to solve the problem of large temperature differences among batteries in a square battery module leading to increased risk of thermal runaway of the battery module and uneven stress on the batteries.

[0006] In a first aspect, the utility model provides a ring-shaped battery module structure, comprising:

[0007] A plurality of fan-shaped units are arranged along a circular path; each of the fan-shaped units comprises two support frames and a battery, a storage space is enclosed between each two support frames, a cross section of the fan-shaped unit is a fan-shaped structure, and the fan-shaped structure is in an arc shape on one side facing the center of the circular path, and the battery is arranged in the storage space.

[0008] Beneficial effects: The annular battery module structure of this structure is formed by multiple fan-shaped units arranged along a circular path. All batteries in the annular battery module structure are between two support frames. Different batteries are in the same environment and have the same exposed surfaces. The temperature difference between batteries at different positions in the annular battery module structure can be effectively reduced, the risk of battery thermal runaway can be reduced, the service life of batteries and battery modules can be increased, and the risk of fire can be reduced, thereby ensuring personal safety and property safety. At the same time, each battery is between two support frames, and batteries at different positions are subjected to the same force, and the consistency of the batteries during the aging process is good. Adjacent batteries are separated by support frames, which can reduce the area of ​​thermal runaway when local batteries are in thermal runaway, reduce the risk of large-scale fires, thereby reducing the hazards of battery thermal runaway and improving the safety performance of the annular battery module structure.

[0009] In an optional embodiment, the adjacent sector-shaped units are sequentially arranged in close proximity along the annular path;

[0010] And / or, the cross section of the accommodating space is rectangular.

[0011] Beneficial effect: Adjacent fan-shaped units are arranged in sequence along the annular path, which can effectively ensure the compactness of the annular battery module structure.

[0012] The cross-section of the accommodating space is rectangular, so that square batteries or soft-pack batteries can be placed in the accommodating space, which can improve the space utilization of the module structure and improve the volume grouping efficiency of the battery module.

[0013] In an optional embodiment, the cross-section of the support frame is fan-shaped, and the top angle of the support frame is arranged toward the center of the circular path; adjacent support frames are spaced apart to form the accommodating space, and the battery is clamped and fixed in the accommodating space by the support frames on both sides thereof.

[0014] Beneficial effect: When the annular battery module structure is grouped, the support frame is fixed first, and then the battery is placed in the accommodating space between two batteries. The two support frames are clamped and fixed to the battery. The battery is fixed conveniently and quickly, which is beneficial to improving the grouping efficiency of the annular battery module structure.

[0015] In an optional embodiment, all adjacent support frames are arranged at equal intervals.

[0016] Beneficial effect: All adjacent support frames are arranged at equal intervals so that the sizes of all accommodating spaces are equal. Batteries of the same size are accommodated in the annular battery module structure, which can ensure that the batteries are evenly distributed, thereby ensuring that all batteries in the module structure are evenly dissipated and evenly stressed.

[0017] In an optional embodiment, each of the support frames includes two support walls, and the two support walls of each support frame are arranged at an angle to the first end of the center of the circular path; two adjacent support walls of adjacent support frames are spaced apart and parallel to each other to form an accommodating space between adjacent support frames, and the battery includes two large surfaces, and the two large surfaces of the battery are respectively fixed on two adjacent support walls.

[0018] Beneficial effects: The large surface of the battery is fixed on the support wall to fix the battery on the support frame, and all batteries and the support frame are connected into an integral structure, which is conducive to ensuring the stability of the annular battery module structure. At the same time, the two large surfaces of the battery are fixed on the support wall, and the heat generated during the operation can be conducted to the support wall, thereby improving the heat dissipation effect of the battery and preventing the battery from thermal runaway.

[0019] In an optional embodiment, the two support walls of each support frame are spaced apart to form a heat dissipation area.

[0020] Beneficial effect: The heat dissipation of the battery can be further improved by allowing the battery to dissipate heat through the heat dissipation area.

[0021] In an optional embodiment, the two support frames in each of the fan-shaped units are spliced ​​together to form a support assembly, and the accommodating space is arranged inside the support assembly.

[0022] Beneficial effects: The battery is arranged in the accommodation space inside the bracket assembly, and the two support frames clamp and fix the battery in the accommodation space, so the battery is easy to assemble and disassemble.

[0023] In an optional embodiment, the two support frames of each bracket assembly are respectively provided with an inserting portion and a matching portion, and the two support frames are insert-matched.

[0024] Beneficial effects: the two support frames are plugged in and matched, and the two support frames are plugged in and matched to be connected, which makes the assembly convenient and quick, and also facilitates the disassembly and assembly of the battery.

[0025] In an optional implementation, the support frame is a metal support frame, and the battery is attached to the support frame.

[0026] Beneficial effect: The metal support frame has good heat dissipation effect, and the battery is directly attached to the support frame to improve the heat dissipation effect of the battery.

[0027] In a second aspect, the utility model further provides a battery pack, comprising the annular battery module structure described in any one of the above.

[0028] Beneficial effects: In a battery pack of this structure, all the batteries inside are located between two support frames, ensuring uniform heat dissipation and uniform stress on all batteries, which can effectively reduce the temperature difference between batteries in the battery pack and increase the service life of the battery pack; at the same time, it can reduce the risk of thermal runaway of the battery and the probability of fire, thereby ensuring personal safety and property safety. Adjacent batteries are separated by support frames, which can reduce the area of ​​thermal runaway in the event of local battery thermal runaway, reduce the risk of large-scale fire, thereby reducing the harm of thermal runaway of the battery and improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A top view of a ring-shaped battery module structure according to an embodiment of the utility model;

[0031] Figure 2 A top view of a ring-shaped battery module structure according to an embodiment of the utility model;

[0032] Figure 3 A top view of another annular battery module structure according to an embodiment of the utility model;

[0033] Figure 4 A top view of another annular battery module structure according to an embodiment of the utility model;

[0034] Figure 5 for Figure 3 Structural schematic diagram of the middle support frame;

[0035] Figure 6 A top view of another annular battery module structure according to an embodiment of the utility model;

[0036] Figure 7 A top view of another annular battery module structure according to an embodiment of the utility model;

[0037] Figure 8 An exploded view of a sector-shaped unit in another annular battery module structure according to an embodiment of the present utility model;

[0038] Fig. 9 This is a schematic diagram of a combination of two fan-shaped units in another annular battery module structure according to an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Fan-shaped unit; 101. Support frame; 1011. Support wall; 1012. Heat dissipation area; 1013. Plug-in part; 1014. Matching part; 102. Battery; 103. Accommodation space. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0042] Combine the following Figures 1 to 9 , describing an embodiment of the utility model.

[0043] According to an embodiment of the present utility model, on the one hand, a ring-shaped battery module structure is provided, such as Figure 1 and Figure 2 As shown, it includes a plurality of fan-shaped units 1, and the plurality of fan-shaped units 1 are arranged along a circular path; each fan-shaped unit 1 includes two support frames 101 and a battery 102, and a receiving space 103 is surrounded by every two support frames 101, and a cross-section of the fan-shaped unit 1 is a fan-shaped structure, and the side of the fan-shaped structure facing the center of the circular path is in an arc shape, and the battery 102 is arranged in the receiving space 103.

[0044] The annular battery module structure of this structure is formed by arranging a plurality of fan-shaped units 1 along an annular path. All batteries 102 in the annular battery module structure are located between two support frames 101. Different batteries 102 are located in the same environment and have the same exposed surfaces. The temperature difference between batteries 102 at different positions in the annular battery module structure can be effectively reduced, the risk of thermal runaway of batteries 102 can be reduced, the service life of batteries 102 and battery 102 modules can be increased, and the risk of fire can be reduced, thereby ensuring personal safety and property safety. At the same time, each battery 102 is located between two support frames 101, and batteries 102 at different positions are subjected to the same force, and the consistency of batteries 102 during aging is good. Adjacent batteries 102 are separated by support frames 101, and when a local battery 102 is in thermal runaway, the area of ​​thermal runaway can be reduced, and the risk of large-scale fire can be reduced, thereby reducing the hazards of thermal runaway of batteries 102 and improving the safety performance of the annular battery module structure.

[0045] The shape of the annular path may be a circular ring or an elliptical ring. Preferably, the shape of the annular path is a circular ring.

[0046] Optionally, in one embodiment, Figures 1 to 4 , Figure 6 and Figure 7 As shown, adjacent sector units 1 are arranged in sequence along an annular path, which can effectively ensure the compactness of the annular battery module structure.

[0047] In other embodiments, adjacent sector-shaped units 1 may also be arranged at a certain distance along the circumference of the annular path.

[0048] In one embodiment, Figures 1 to 4 , Figure 6 and Figure 7 As shown, the cross-section of the accommodating space 103 is rectangular, so that square batteries or soft-pack batteries can be placed in the accommodating space 103, which can improve the space utilization of the module structure and improve the volume grouping efficiency of the battery 102 module.

[0049] In other embodiments, the cross-section of the accommodating space 103 may also be any shape such as circular, elliptical or triangular, as long as an accommodating space 103 is provided between every two support frames 101 to ensure that all batteries 102 in the annular battery module structure are in the same environment.

[0050] Optionally, in one embodiment, Figure 1 and Figure 2 As shown, the cross section of the support frame 101 is fan-shaped, and the top corner of the support frame 101 is arranged toward the center of the circular path; adjacent support frames 101 are arranged at intervals to form a receiving space 103, and the battery 102 is clamped and fixed in the receiving space 103 by the support frames 101 on both sides thereof. When the annular battery module structure is grouped, the support frame 101 is fixed first, and then the battery 102 is placed in the receiving space 103 between the two batteries 102. The two support frames 101 are clamped and fixed to the battery 102, and the battery 102 is fixed conveniently and quickly, which is conducive to improving the grouping efficiency of the annular battery module structure.

[0051] Specifically, in this embodiment, the annular battery module structure further includes an annular bottom plate, and a protrusion is provided at the bottom of the support frame 101, and the protrusion is plugged and fixed on the annular bottom plate to fix the support frame 101 on the annular bottom plate.

[0052] Optionally, in one embodiment, all adjacent support frames 101 are arranged at equal intervals so that the sizes of all accommodating spaces 103 are equal. Batteries 102 of the same size are accommodated in the annular battery module structure, which can ensure that the batteries 102 are evenly distributed, thereby ensuring that all batteries 102 in the module structure are evenly dissipated and evenly stressed.

[0053] In one embodiment, Figures 3 to 5As shown, each support frame 101 includes two support walls 1011, and the two support walls 1011 of each support frame 101 are arranged at an angle to the first end of the center of the circular path; the two adjacent support walls 1011 of adjacent support frames 101 are spaced apart and parallel to each other to form a receiving space 103 between the adjacent support frames 101, and the battery includes two large faces, and the two large faces of the battery 102 are respectively fixed on the two adjacent support walls 1011. The large faces of the battery 102 are fixed on the support wall 1011 to fix the battery 102 on the support frame 101, and all the batteries 102 and the support frame 101 are connected into an integral structure, which is conducive to ensuring the stability of the annular battery module structure. At the same time, the two large faces of the battery 102 are fixed on the support wall 1011, and the heat generated during the operation can be conducted to the support wall 1011, thereby improving the heat dissipation effect of the battery 102 and preventing the battery 102 from thermal runaway.

[0054] like Figures 3 to 5 As shown, the two support walls 1011 of each support frame 101 are spaced apart to form a heat dissipation area 1012 , so that the battery 102 can dissipate heat through the heat dissipation area 1012 , thereby further improving the heat dissipation effect of the battery 102 .

[0055] Specifically, in this embodiment, the two support walls 1011 of the support frame 101 are integrally connected at one end facing the center of the annular path, and the two support walls 1011 are arranged to be spread apart from each other at one end facing away from the center of the annular path. A connecting column is arranged between the two support walls 1011, and a mounting hole is provided on the connecting column. The annular battery module structure also includes an annular base plate, and bolts pass through the mounting holes and the annular base plate, and then cooperate with nuts to fix the support frame 101 on the annular base plate.

[0056] The connecting column is supported between the two supporting walls 1011 , which can improve the overall strength of the supporting frame 101 and ensure its supporting effect on the battery 102 .

[0057] In one embodiment, the large surface of the battery 102 is bonded and fixed to the support wall 1011. An elastic buffer is attached to the large surface of the battery 102, and the elastic buffer is attached to the support wall 1011. The elastic buffer is compressed and deformed by the support frame 101, which can offset the thickness tolerance of the battery 102 and ensure that the large surface of the battery 102 is stably attached to the support wall 1011.

[0058] like Figures 6 to 9As shown, two support frames 101 in each sector unit 1 are spliced ​​and matched to form a support assembly, and a receiving space 103 is arranged inside the support assembly. The cross section of the support assembly is a sector-shaped structure, and the side facing the center of the annular path is an arc surface. The receiving space 103 is arranged inside the support assembly, and the battery 102 is arranged in the receiving space 103 inside the support assembly. The two support frames 101 clamp and fix the battery 102 in the receiving space 103, and the battery 102 is easy to assemble and disassemble.

[0059] Optionally, in one embodiment, Figure 8 and Fig. 9 As shown, the two support frames 101 of each bracket assembly are respectively provided with a plug-in portion 1013 and a matching portion 1014, and the two support frames 101 are plug-fitted. The two support frames 101 are connected by plug-fitting, which is convenient and quick to assemble, and it is also convenient to disassemble and assemble the battery 102.

[0060] Specifically, in a bracket assembly, a plug-in portion 1013 is respectively provided on both radial sides of the upper end of a support frame 101, and a plug-in portion 1013 is also respectively provided on both radial sides of the lower end of the support frame 101. A matching portion 1014 is provided at the corresponding position of the other support frame 101. The two plug-in portions 1013 on the upper part of the support frame 101 match with the two matching portions 1014, and the two plug-in portions 1013 on the lower part of the support frame 101 match with the two matching portions 1014, so as to quickly clamp the battery 102 between the two support frames 101.

[0061] Optionally, in one embodiment, a first flange portion extending along the circumference of the annular path is provided on the side of the support frame 101 facing the center of the annular path, and a second flange portion extending along the circumference of the annular path is provided on the side of the support frame 101 facing away from the center of the annular path. The first flange portions of the two support frames 101 are spliced ​​together to form an arc surface on the inner side of the fan-shaped unit 1, and the second flange portions of the two support frames 101 are butt-jointed together to form an arc surface on the outer side of the fan-shaped unit 1.

[0062] Optionally, in one embodiment, the support frame 101 is a metal support frame, and the battery 102 is attached to the support frame 101. The metal support frame has a good heat dissipation effect, and the battery 102 is directly attached to the support frame 101 to improve the heat dissipation effect of the battery 102.

[0063] In other embodiments, the support frame 101 may also be made of plastic.

[0064] According to an embodiment of the present invention, on the other hand, a battery pack is provided, comprising the above-mentioned annular battery module structure.

[0065] In a battery pack of this structure, all the batteries 102 inside are located between two support frames 101, ensuring uniform heat dissipation of all batteries 102, which can effectively reduce the temperature difference between the batteries 102 in the battery pack and increase the service life of the battery pack; at the same time, it can reduce the risk of thermal runaway of the batteries 102 and the probability of fire, thereby ensuring personal safety and property safety. Adjacent batteries 102 are separated by support frames 101, which can reduce the area of ​​thermal runaway when a local battery 102 is in thermal runaway, reduce the risk of large-scale fire, thereby reducing the harm of thermal runaway of the batteries 102 and improving the safety performance of the battery pack.

[0066] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A ring-shaped battery module structure, characterized in that: include: A plurality of fan-shaped units are arranged along a circular path; each of the fan-shaped units comprises two support frames and a battery, a storage space is enclosed between each two support frames, a cross section of the fan-shaped unit is a fan-shaped structure, and the fan-shaped structure is in an arc shape on one side facing the center of the circular path, and the battery is arranged in the storage space.

2. The annular battery module structure according to claim 1, characterized in that: The adjacent sector-shaped units are arranged in sequence along the annular path; And / or, the cross section of the accommodating space is rectangular.

3. The annular battery module structure according to claim 1 or 2, characterized in that: The cross section of the support frame is fan-shaped, and the top corner of the support frame is arranged toward the center of the circular path; adjacent support frames are arranged at intervals to form the accommodating space, and the battery is clamped and fixed in the accommodating space by the support frames on both sides thereof.

4. The annular battery module structure according to claim 3, characterized in that: All adjacent support frames are arranged at equal intervals.

5. The annular battery module structure according to claim 1 or 2, characterized in that: Each of the support frames includes two support walls, and the two support walls of each support frame are arranged at an angle to the first end of the center of the circular path; two adjacent support walls of adjacent support frames are spaced apart and parallel to each other to form an accommodating space between adjacent support frames, and the battery includes two large surfaces, and the two large surfaces of the battery are respectively fixed on two adjacent support walls.

6. The annular battery module structure according to claim 5, characterized in that: The two support walls of each support frame are spaced apart to form a heat dissipation area.

7. The annular battery module structure according to claim 1 or 2, characterized in that: The two support frames in each of the fan-shaped units are spliced ​​and matched to form a support assembly, and the accommodating space is arranged inside the support assembly.

8. The annular battery module structure according to claim 7, characterized in that: The two support frames of each bracket assembly are respectively provided with an inserting portion and a matching portion, and the two support frames are inserted and matched.

9. The annular battery module structure according to claim 1 or 2, characterized in that: The support frame is a metal support frame, and the battery is attached to the support frame.

10. A battery pack, characterized in that: A ring-shaped battery module structure comprising any one of claims 1 to 9.

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