Support, supporting frame, battery cell assembly and battery

Abstract

The utility model relates to the technical field of batteries, particularly provides a bracket, a supporting frame, a battery cell assembly and a battery, and aims to solve the problem that tabs are easy to tear and break in the process of fixing the tabs by the bracket. In order to achieve the purpose, a channel for a battery cell tab to penetrate through is formed in a support, in the first direction, the size of the channel is A, the size of the tab is B, and A / B is larger than or equal to 1 and smaller than or equal to 10; and in the second direction, the size of the channel is H, the size of the tab is W, and H / W is more than or equal to 1.125 and less than or equal to 10. According to the application, the channel for the battery cell tab to pass through is arranged on the bracket, and the sizes of the channel and the tab are limited, so that the tab can be mounted in the channel of the bracket, the tab is prevented from being bent in the mounting process, and meanwhile, the situations that the tab is torn and broken in the use process of the battery and the like can be prevented; and the safety performance of the battery is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a bracket, a support frame, a battery core assembly and a battery. Background Art

[0002] With the development of modern technology, electric vehicles have gradually entered people's lives. Electric vehicles refer to vehicles that use onboard batteries as power and motors to drive the wheels. Compared with traditional fuel vehicles, electric vehicles have many advantages such as zero emissions, low energy consumption, and low noise, and are therefore favored by more and more users. As a clean and efficient energy storage device, lithium-ion batteries have greatly improved the endurance of the entire vehicle, making the market share of pure electric vehicles increase year by year.

[0003] The cell assembly in a typical lithium-ion battery includes a cell and a support frame, wherein the support frame includes a bracket disposed at the end of the cell, and the bracket is provided with a through hole through which the cell tab passes. The setting of the bracket can protect the cell on the one hand, and on the other hand, it can also isolate the tab from the metal part of the battery, thus playing an insulating role. However, the bracket of the traditional support frame is usually used to clamp the tab, so that the battery body shakes relative to the tab during the shaking process, causing the tab to tear and break easily, resulting in damage and failure of the battery, affecting the safety of battery use.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the pole ear is easily torn and broken during the process of fixing the pole ear with a bracket.

[0006] The present application provides a bracket, which is arranged at the end of a battery cell, and the bracket is provided with a channel through which the battery cell tab passes. In a first direction, the size of the channel is A, and the size of the tab is B, wherein 1≤A / B≤10; in a second direction, the size of the channel is H, and the size of the tab is W, wherein 1.125≤H / W≤10.

[0007] In a preferred technical solution of the above bracket, the bracket includes a first frame body and a second frame body arranged in a second direction, and the first frame body is snap-connected with the second frame body.

[0008] In a preferred technical solution of the above-mentioned bracket, the first end of the first frame is provided with a first snap portion and the second end is provided with a second snap portion, the first end of the second frame is provided with a second snap portion and the second end is provided with a first snap portion, and the first snap portion is snap-connected with the second snap portion.

[0009] In a preferred technical solution of the above bracket, the first buckle portion is a buckle hole, and the second buckle portion is a buckle block.

[0010] In a preferred technical solution of the above-mentioned bracket, the clamping block includes a connecting plate connected to the bracket and a protrusion arranged on the connecting plate, and the connecting plate is in the shape of a flat plate.

[0011] In the preferred technical solution of the above-mentioned bracket, 1≤A / B≤5; and / or, 4≤H / W≤10.

[0012] In a preferred technical solution of the above bracket, the end surface of the bracket facing away from the battery cell is provided with a step for accommodating the pole, the bottom surface of the step is provided with a plurality of grooves, and the bottom surface of the grooves is provided with through holes.

[0013] The present application also provides a support frame, which includes two brackets as described in the above preferred technical solution and a connecting piece for connecting the two brackets, wherein the connecting piece is arranged on both sides of the bracket, and the connecting piece is snap-connected to the bracket.

[0014] The present application also provides a battery cell assembly, which includes the support frame described in the above preferred technical solution and a battery cell accommodated in the support frame, and the tabs of the battery cell pass through the channel.

[0015] The present application also provides a battery, which includes the battery cell assembly described in the above preferred technical solution.

[0016] Those skilled in the art will appreciate that the utility model provides a channel on the bracket through which the pole ear of the power supply core passes, and limits the size of the channel and the pole ear, so that the pole ear can be installed in the channel of the bracket, avoiding bending of the pole ear during installation, thereby improving structural stability and safety.

[0017] Furthermore, the first frame body is connected to the second frame body in a snap-fit ​​manner, which reduces the difficulty of assembly, facilitates installation and disassembly of the bracket, improves the assembly efficiency of the bracket, and further improves the production efficiency of the battery.

[0018] Furthermore, by setting one of the first buckle portion and the second buckle portion as a buckle hole and the other as a buckle block, the first frame and the second frame can be connected in a buckle manner.

[0019] Furthermore, by providing a groove on the bottom surface of the step and providing a plurality of through holes on the bottom surface of the groove, the problem of electrolyte accumulation can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a structural diagram of the battery of the utility model;

[0022] Figure 2 It is an exploded diagram of the battery of the utility model;

[0023] Figure 3 It is a structural diagram of the battery core assembly of the utility model;

[0024] Figure 4 It is an exploded view of the battery cell assembly of the utility model;

[0025] Figure 5 It is a structural diagram of the battery core assembly of the utility model;

[0026] Figure 6 yes Figure 5 Cross-section at the middle BB;

[0027] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0028] Figure 8 It is a partial structural diagram of the battery cell of the utility model;

[0029] Fig. 9 yes Figure 3 The enlarged view of point A in the middle;

[0030] Fig.10 yes Figure 3 Enlarged view of point C in the middle;

[0031] Fig.11 It is a plan view of the bracket of the utility model;

[0032] Fig.12 It is an exploded view of the bracket of the utility model;

[0033] Fig.13 This is the structure of the first frame of the utility model Figure 1 ;

[0034] Fig.14 This is the structure of the first frame of the utility model Figure 2 .

[0035] List of reference numerals:

[0036] 1. Battery cell; 11. Ear; 2. Support frame; 21. Bracket; 211. First frame; 2111. Block; 21111. Connecting plate; 21112. Bump; 2112. Hole; 212. Second frame; 213. Step; 214. Groove; 215. Through hole; 216. Channel; 217. Buckle block; 22. Connector; 221. Hole; 3. Pole; 4. Shell; 41. First shell; 42. Second shell; 43. Partition. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0038] It should be noted that, in the description of the present application, terms such as "upper", "lower", "inner", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0039] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] First refer to Figure 1-14 The bracket of the present application is introduced.

[0041] The battery cell assembly of the present application includes a battery cell 1 and a support frame 2, wherein a bracket 21 in the support frame 2 is used to support and insulate the tab 11 of the battery cell 1, which can protect the battery on the one hand, and can also isolate the tab 11 from the metal part of the battery on the other hand, playing an insulating role. The bracket 21 of the present application is arranged at the end of the battery cell 1, and a channel 216 is provided on the bracket 21 for the tab 11 of the battery cell 1 to pass through, in the first direction (such as Figure 2 In the X direction (shown), the size of the channel 216 is A, and the size of the tab 11 is B, wherein 1≤A / B≤10; in the second direction (such as Figure 2 In the Y direction shown, the dimension of the channel 216 is H, and the dimension of the pole ear 11 is W, wherein 1.125≤H / W≤10.

[0042] In the first direction, the size of the channel 216 is A, and the size of the tab 11 is B, wherein 1≤A / B≤10. For example, in the first direction, the size ratio of the channel 216 to the tab 11 may be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10. Preferably, 1≤A / B≤5. The above arrangement can prevent the tab 11 from being too large relative to the channel 216, causing the tab 11 to be unable to pass through the channel 216, thereby affecting the assembly and structural stability of the battery; on the other hand, it can prevent the tab 11 from being too small relative to the channel 216, causing the tab 11 to have a weak current carrying capacity, thereby affecting the overall electrical performance of the battery.

[0043] In the second direction, the size of the channel 216 is H, and the size of the tab 11 is W, wherein 1.125≤H / W≤10. For example, in the second direction, the size ratio of the channel 216 to the tab 11 may be 1.125, 2, 3, 4, 5, 6, 7, 8, 9 or 10. Preferably, 4≤H / W≤10. The setting of the above parameters can, on the one hand, prevent the tab 11 from being too thin relative to the channel 216, thereby affecting the current flow capacity and structural stability, thereby ensuring the structural stability and electrical performance of the battery; on the other hand, it can prevent the tab 11 from being too thick relative to the channel 216, thereby causing friction between the tab 11 and the inner wall of the channel 216, or the channel 216 from pressing the tab 11, so that the tab is easily worn or torn during use of the battery, thereby ensuring the stability and safety of the structure.

[0044] See below for further reference Figure 1-14 , a preferred implementation of the bracket 21 of the present application is introduced.

[0045] See also Figure 1-11 The battery includes a shell 4 and a cell assembly accommodated in the shell 4. The cell assembly includes a support frame 2, a cell 1 accommodated in the support frame 2, and a pole 3 electrically connected to the pole lug 11 of the cell 1. The support frame 2 includes two brackets 21, which are arranged on both sides of the cell 1 in the third direction. The bracket 21 includes a first frame 211 and a second frame 212 arranged in the second direction. One end (first end) of the first frame 211 is provided with a first buckle portion and the other end (second end) is provided with a second buckle portion. One end (first end) of the second frame 212 is provided with a second buckle portion and the other end (second end) is provided with a first buckle portion. The first buckle portion of the first frame 211 is buckled with the second buckle portion of the second frame 212, and the second buckle portion of the first frame 211 is buckled with the first buckle portion of the second frame 212. The first buckle portion is a buckle hole 2112 , and the second buckle portion is a buckle block 2111 matched with the buckle hole 2112 , thereby facilitating the buckle connection between the first frame 211 and the second frame 212 , and also facilitating the bracket 21 to support and insulate the tab 11 .

[0046] Of course, the specific arrangement of the first buckle part and the second buckle part is not fixed in the present application, and those skilled in the art can adjust it as needed. For example, the first buckle part is a block 2111, and the second buckle part is a hole 2112 that cooperates with the block 2111.

[0047] See next Figure 12-14 The clamping block 2111 includes a connecting plate 21111 connected to the bracket 21 and a protrusion 21112 disposed on the connecting plate 21111. The connecting plate 21111 is in the shape of a flat plate, and the protrusion 21112 is integrally formed with the connecting plate 21111. The cross-sectional area of ​​the protrusion 21112 gradually decreases from the direction close to the connecting plate 21111 to the direction away from the bracket body, so that the protrusion 2111 can smoothly enter the clamping hole 2112.

[0048] Of course, the present application adopts other fixing methods to connect the protrusion 21112 and the connecting plate 21111, such as using screws, adhesives, etc. to connect the connecting plate 21111 and the protrusion 21112 together. As long as the connecting plate 21111 and the protrusion 21112 are connected together to form a block 2111, the present application has no restriction on the connection method between the connecting plate 21111 and the protrusion 21112.

[0049] See next Figure 8 and Fig.11 A first receiving groove is provided on one side of the first frame 211 close to the second frame 212, and a second receiving groove is provided on one side of the second frame 212 close to the first frame 211. The first receiving groove and the second receiving groove are symmetrically arranged relative to the pole ear 11, and the two are connected to form a channel 216 through which the pole ear 11 of the battery cell 1 passes, which is used to fix the pole ear 11.

[0050] See next Figure 8-14 The first frame 211 and the second frame 212 are provided with a first end face facing the battery cell 1 and a second end face facing the pole 3. The second end faces of the two frames are provided with steps 213 that are interconnected and used to accommodate part of the pole 3. The step 213 is arranged on the end face of the bracket 21 away from the battery cell 1. The step 213 can accommodate part of the pole 3. The bottom surface of the step 213 is provided with a plurality of grooves 214, and the bottom surface of the groove 214 is provided with a plurality of through holes 215.

[0051] The ratio of the area of ​​the through hole 215 to the bottom area of ​​the groove 214 ranges from 0.1 to 0.8. For example, the ratio of the area of ​​the through hole 215 to the bottom area of ​​the groove 214 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8. The above arrangement can prevent the through hole 215 from occupying too large an area of ​​the step 213, thereby reducing the stability of the overall structure of the bracket 21. On the other hand, it can prevent the through hole 215 from occupying too small an area of ​​the step 213, thereby causing the electrolyte to accumulate in the step 213, thereby not only improving the stability of the overall structure of the battery, but also making full use of the electrolyte.

[0052] Of course, the present application has no limitation on the number of grooves 214 on the first frame 211 and the second frame 212, as long as the electrolyte can be prevented from accumulating. For example, the number of grooves 214 on the first frame 211 and the second frame 212 can be the same or different. When they are the same, the number of grooves 214 on each frame can be as follows: Fig.14 When different, the number of grooves 214 on the first frame 211 can be four, and the number of grooves 214 on the second frame 212 can be three.

[0053] In addition, the present application has no limitation on the number of through holes 215 on the first frame 211 and the second frame 212, as long as the electrolyte can be prevented from accumulating. For example, the number of through holes 215 on the first frame 211 and the second frame 212 can be the same or different. When they are the same, the number of through holes 215 on each frame can be as follows: Fig.14 When different, the number of through holes 215 on the first frame 211 may be three, and the number of through holes 215 on the second frame 212 may be four.

[0054] See next Figure 3-9 , the support frame 2 of the present application is introduced.

[0055] The support frame 2 includes two brackets 21 as any of the above preferred embodiments and a connecting piece 22 for connecting the two brackets 21 . The connecting piece 22 is disposed on both sides of the bracket 21 , and the connecting piece 22 is snap-connected to the bracket 21 .

[0056] In the present application, the bracket 21 and the connecting member 22 are connected by a snap-fit ​​method, which is not only convenient for the installation and disassembly of the support frame 2 but also can increase the overall strength of the support frame 2 .

[0057] See also Figure 3-9 The two brackets 21 are respectively arranged in the third direction (such as Figure 4The bracket 21 is located on both sides of the battery cell 1 in the Z direction (shown), and is used to fix the tab 11; the two connectors 22 are respectively arranged on both sides of the battery cell 1 in the first direction. The two brackets 21 are provided with buckle blocks 217 on both sides of the first direction, and the connector 22 is provided with a buckle hole 221 that cooperates with the buckle block 217. The buckle block 217 passes through the buckle hole 211 and is buckled in the buckle hole 221, so as to realize the buckle connection between the connector 22 and the bracket 21.

[0058] See next Figure 3-9 , the battery cell components of this application are introduced.

[0059] The battery cell assembly includes the support frame 2 of any preferred embodiment described above and the battery cell 1 accommodated in the support frame 2 , and the tab 11 of the battery cell 1 passes through the channel 216 .

[0060] By accommodating the battery cell 1 in the support frame 2 and passing the pole ear 11 of the battery cell 1 through the channel 216, the support frame 2 can protect the battery cell 1 while preventing the pole ear 11 from bending, causing local wrinkles on the pole ear 11, which causes stress concentration in the wrinkled part of the pole ear 11 during operation of the vehicle, thereby causing the pole ear 11 to tear, thereby improving the safety performance of the battery.

[0061] In addition, see Figure 1-2 The present application also provides a battery, which includes a battery cell assembly in any of the above embodiments.

[0062] Specifically, the battery includes a shell 4 and a cell assembly arranged in the shell 4. The shell 4 includes a first shell 41, a second shell 42 and a partition 43, wherein the partition 43 and the first shell 41 form a first cavity, and the partition 43 and the second shell 42 form a second cavity, and the cell assembly is arranged in both cavities. By providing a channel 216 for the tab 11 of the power core 1 to pass through on the bracket 21 in the battery, and limiting the size of the channel 216 and the tab 11, the tab 11 can be installed in the channel 216 of the bracket 21, avoiding bending of the tab 11 during installation, resulting in partial wrinkling of the tab 11, causing stress concentration in the wrinkled part of the tab 11 during operation of the vehicle, thereby causing the tab 11 to tear, thereby improving the safety performance of the battery.

[0063] Those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.

[0064] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A bracket, arranged at the end of a battery cell, characterized in that: The bracket is provided with a channel through which the battery cell tab passes. In a first direction, the size of the channel is A, and the size of the tab is B, wherein 1≤A / B≤10; in a second direction, the size of the channel is H, and the size of the tab is W, wherein 1.125≤H / W≤10.

2. The bracket according to claim 1, characterized in that: The bracket includes a first frame body and a second frame body arranged in a second direction, and the first frame body is buckledly connected with the second frame body.

3. The bracket according to claim 2, characterized in that: The first end of the first frame is provided with a first buckle part and the second end is provided with a second buckle part, the first end of the second frame is provided with a second buckle part and the second end is provided with a first buckle part, and the first buckle part is buckled and connected with the second buckle part.

4. The bracket according to claim 3, characterized in that: The first buckle portion is a buckle hole, and the second buckle portion is a buckle block.

5. The bracket according to claim 4, characterized in that: The clamping block comprises a connecting plate connected to the bracket and a protrusion arranged on the connecting plate, and the connecting plate is in the shape of a flat plate.

6. The bracket according to claim 1, characterized in that: 1≤A / B≤5; and / or, 4≤H / W≤10.

7. The bracket according to claim 1, characterized in that: The end surface of the bracket facing away from the battery core is provided with a step for accommodating the pole, the bottom surface of the step is provided with a plurality of grooves, and the bottom surface of the groove is provided with a through hole.

8. A support frame, characterized in that: The support frame includes two brackets according to any one of claims 1 to 7 and a connector for connecting the two brackets, wherein the connector is disposed on both sides of the bracket and is snap-connected to the bracket.

9. A battery cell assembly, characterized in that: The battery cell assembly comprises the support frame according to claim 8 and a battery cell accommodated in the support frame, and the tabs of the battery cell pass through the channel.

10. A battery, characterized in that: The battery comprises the battery cell assembly according to claim 9.

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