Support, supporting frame and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a bracket, a supporting frame and a battery, and aims to solve the problem that the energy density of the battery is reduced due to large occupied space when the conventional bracket is matched with a post terminal to be mounted on the battery. In order to achieve the purpose, the step for accommodating part of the pole is arranged on the first end face of the support, so that the part, penetrating through the channel, of the pole lug can be connected with the pole in the step, the pole part is arranged in the step, the pole can be conveniently installed and positioned, the overall size of the support and the pole is reduced, and the cost is reduced. And the space utilization rate and the energy density of the battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a bracket, a supporting frame 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] A typical lithium-ion battery includes a shell, a battery cell, a pole, and a support frame, wherein the support frame is between the shell and the battery cell, the battery cell is accommodated in the support frame, and a bracket in the support frame is provided with a channel through which the battery cell pole ear passes to support and insulate the pole ear, and the pole ear passes through the channel on the bracket and is electrically connected to the pole, thereby realizing the output of electric energy. However, the end face of the existing bracket facing the pole is flat and in direct contact with the pole, which will cause the bracket and the pole to occupy a large space, resulting in a reduction in the energy density of the battery.

[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 of how the existing bracket cooperates with the pole to reduce the volume occupied by the pole and improve the energy density of the battery.

[0006] The present application provides a bracket, which is arranged between a battery cell and a pole, wherein the bracket is provided with a first end face facing the pole, and the first end face is provided with a step for accommodating the pole.

[0007] In a preferred technical solution of the above bracket, a plurality of grooves are provided on the bottom surface of the step, and a through hole is provided on the bottom surface of the groove.

[0008] In a preferred technical solution of the above-mentioned bracket, a channel through which the battery cell tab passes is provided on the bracket, and the channel is connected to the step.

[0009] In a preferred technical solution of the above-mentioned bracket, in the first direction, the size of the channel is A, and the size of the tab is B, wherein 1≤A / B≤10.

[0010] In a preferred technical solution of the above-mentioned bracket, in the second direction, the size of the channel is H, and the size of the tab is W, wherein 1.125≤H / W≤10.

[0011] 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.

[0012] 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.

[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 connecting the two brackets, and the bracket is snap-connected to the connecting piece.

[0014] In the preferred technical solution of the above-mentioned support frame, two connecting members are provided and are respectively located on two sides of the bracket in the first direction.

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

[0016] Those skilled in the art will appreciate that the utility model provides a step on the first end face of the bracket for accommodating at least a portion of the pole, so that at least a portion of the pole is disposed in the step, which not only facilitates the installation of the pole, but also reduces the volume occupied by the bracket and the pole as a whole, thereby facilitating the improvement of the energy density of the battery.

[0017] Furthermore, by providing a channel on the bracket, the channel can allow the pole ear to pass through, thereby facilitating the installation and fixation of the pole ear, ensuring the stability of the overall structure of the battery, and preventing the pole ear from bending and causing a short circuit.

[0018] 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.

[0019] Furthermore, by limiting the size of the channel and the tab, the tab is arranged in the channel of the bracket, which facilitates the installation and fixation of the tab, avoids bending of the tab and other causes of short circuit, and improves structural stability and production and assembly efficiency.

[0020] 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.

[0021] Furthermore, by providing a first snap-in portion at the first end of the first frame and a second snap-in portion at the second end, providing a second snap-in portion at the first end of the second frame and a first snap-in portion at the second end, the first snap-in portion of the first frame is snap-connected with the second snap-in portion of the second frame, and the second snap-in portion of the first frame is snap-connected with the first snap-in portion of the second frame, the first frame and the second frame can be snap-connected in a snap-in manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0023] Figure 1 It is a structural diagram of the battery of the utility model;

[0024] Figure 2 It is an exploded diagram of the battery of the utility model;

[0025] Figure 3 It is a structural diagram of the battery core assembly of the utility model;

[0026] Figure 4 It is an exploded view of the battery cell assembly of the utility model;

[0027] Figure 5 It is a structural diagram of the battery core assembly of the utility model;

[0028] Figure 6 It is a partial structural diagram of the battery core assembly of the utility model;

[0029] Figure 7 yes Figure 3 The enlarged view of point A in the middle;

[0030] Figure 8 yes Figure 3 Enlarged view of point C in the middle;

[0031] Fig. 9 It is a plan view of the bracket of the utility model;

[0032] Fig.10 yes Figure 5 Sectional view of the middle BB section;

[0033] Fig.11 yes Fig.10 Enlarged view of point B in the middle;

[0034] Fig.12 It is an exploded view of the bracket of the utility model;

[0035] Fig.13 This is the structure of the first frame of the utility model Figure 1 ;

[0036] Fig.14 This is the structure of the first frame of the utility model Figure 2 .

[0037] List of reference numerals:

[0038] 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; 218. First end face; 219. Second end face; 22. Connector; 221. Hole; 3. Pole; 4. Shell; 41. First shell; 42. Second shell; 43. Partition. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] First refer to Figure 1-14 The bracket of the present application is introduced.

[0043] The battery of the present application includes a cell assembly and a pole 3, wherein the cell assembly includes a support frame 2 and a cell 1 accommodated in the support frame 2. The support frame 2 includes two brackets 21, which are respectively arranged in the third direction ( Figure 1The existing bracket 21 is usually a rectangular parallelepiped structure. Although it can protect the pole lug 11, when the pole 3 electrically connected to the pole lug 11 is installed thereon, the overall occupied volume of the bracket 21 and the pole 3 is relatively large, thereby reducing the energy density of the battery. In order to solve the above problems, the bracket 21 of the present application is arranged between the battery cell 1 and the pole 3, and the bracket 21 is provided with a second end face 218 facing the battery cell 1 and a first end face 219 facing the pole 3. The bracket 21 is provided with a channel 216 so that the pole lug 11 of the battery cell 1 passes through the channel 216 and is electrically connected to the pole 3. The first end face 219 is provided with a step 213 for accommodating at least part of the pole 3.

[0044] In the present application, a step 213 for accommodating at least part of the pole 3 is provided on the first end face 219 of the bracket 21, so that the part of the pole lug 11 passing through the channel 216 can be connected to the pole 3 in the step 213, so that at least part of the pole 3 is provided in the step 213, which is not only conducive to the installation and positioning of the pole 3, but also reduces the volume of the battery, thereby facilitating the improvement of the energy density of the battery. In addition, by providing the channel 216 on the bracket 21, the channel 216 can allow the pole lug 11 to pass through, thereby facilitating the installation and fixation of the pole lug 11, avoiding bending of the pole lug 11 during the installation process, etc., which causes a short circuit, thereby improving the safety performance of the battery.

[0045] See below for further reference Figure 1-14 , a preferred implementation of the bracket 21 of the present application is introduced.

[0046] The battery comprises a housing 4 and a cell assembly disposed in the housing 4. The cell assembly comprises a support frame 2, a cell 1 contained in the support frame 2, and a tab 11 of the cell 1 being used to be electrically connected to a pole 3. The support frame 2 comprises two brackets 21, which are respectively disposed in a third direction (such as Figure 4 The bracket 21 is arranged on one side of the battery cell 1 in the third direction, and the bracket 21 includes a Figure 4 The first frame 211 and the second frame 212 are arranged in the Y direction (shown), the first end of the first frame 211 is provided with a first buckle portion and the second end is provided with a second buckle portion, the first end of the second frame 212 is provided with a second buckle portion and the 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 block 2111 matched with the buckle hole 2112, so as to facilitate the buckle connection between the first frame 211 and the second frame 212, and also facilitate the bracket 21 to support and insulate the pole lug 11.

[0047] 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 clamping block 2111, and the second buckle part is a clamping hole 2112 that cooperates with the clamping block 2111.

[0048] The first buckle portion and the second buckle portion of the first frame 211 are about the center line of the first frame 211 ( Figure 12-14 The first buckle portion of the second frame 212 and the second buckle portion are symmetrically arranged about the center line of the second frame 212 ( Fig.12 The dotted line in the figure is symmetrical.

[0049] It should be noted that this symmetry refers to positional symmetry, not structural symmetry.

[0050] See next Fig.13 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 21, so that the protrusion 21112 can smoothly enter the clamping hole 2112.

[0051] 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.

[0052] See next Figure 6 and Fig. 9 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.

[0053] In the first direction (such as Figure 4In the X direction shown in FIG. 1 , 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. 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. By limiting the size ratio of the channel 216 and the pole lug 11, the pole lug 11 can be set in the channel 216 of the bracket 21. The channel 216 is convenient for installing and fixing the pole lug 11, avoiding bending of the pole lug 11 during installation to cause a short circuit, thereby improving the safety performance of the battery; at the same time, it is convenient to install the pole lug 11 on the bracket 21 during assembly, thereby improving the efficiency of assembly production; finally, the pole lug 11 can shake in the limited environment of the channel 216, preventing the battery from shaking during use and causing the pole lug 11 to be torn, thereby ensuring the stability of the pole lug 11 structure and the safety of use.

[0054] The first frame 211 and the second frame 212 are provided with a second end face 218 facing the battery cell 1 and a first end face 219 facing the pole 3. The first end faces 219 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 provided on the end face of the support 21 away from the battery cell 1. The step 213 can accommodate part of the pole 3. The pole 3 is electrically connected to the part of the pole ear 11 passing through the channel 216. 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.

[0055] The ratio of the area of ​​the through hole 215 to the 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 to 0.8. The setting of the above parameters can prevent the cross-section of the through hole 215 from being too small to affect the effect of removing the accumulated liquid in the groove 214, and can prevent the cross-section of the through hole 215 from being too large to cause the structural strength of the bracket 21 to be weak and affect the overall structural stability of the battery. On the basis of ensuring the stability of the support frame structure, the accumulated liquid in the groove 214 can be effectively removed, and the electrolyte can be fully utilized.

[0056] 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.

[0057] 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 disposed on the first frame 211 may be one, and the number of through holes 215 disposed on the second frame 212 may be four.

[0058] See next Figure 3-9 , the support frame 2 of the present application is introduced.

[0059] The support frame 2 includes two brackets 21 of any of the above embodiments and a connecting piece 22 connecting the two brackets 21 , and the brackets 21 are snap-connected to the connecting piece 22 .

[0060] In the present application, the bracket 21 and the connector 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. In addition, since the step 213 for accommodating at least part of the pole 3 is provided on the bracket 21, the part of the pole lug 11 passing through the channel 216 can be connected to the pole 3 in the step 213, so that at least part of the pole 3 is arranged in the step 213, which is not only convenient for the installation of the pole 3, but also reduces the volume of the battery, thereby helping to improve the energy density of the battery.

[0061] Two brackets 21 are respectively arranged on both sides of the battery cell 1 in the third direction, and the brackets 21 are used to fix the tabs 11; a connector 22 is arranged between the two brackets 21, and the two connectors 22 are respectively arranged on both sides of the battery cell 1 in the first direction. Buckle blocks 217 are arranged on both sides of the bracket 21 in the second direction, and a buckle hole 221 matching with the buckle block 217 is arranged on the connector 22, and the buckle block 217 is buckled in the buckle hole 221.

[0062] In addition, the present application also provides a battery, which includes the support frame 2 in any of the above embodiments.

[0063] Specifically, the battery includes a shell 4 and a battery cell 1 disposed 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 battery cells 1 are disposed in both cavities. By providing a step 213 for accommodating at least part of the pole 3 on the bracket 21 of the battery, the part of the pole lug 11 passing through the channel 216 can be connected to the pole 3 in the step 213, so that at least part of the pole 3 is disposed in the step 213, which is not only conducive to the installation of the pole 3, but also reduces the volume of the battery, thereby facilitating the improvement of the energy density of the battery.

[0064] Those skilled in the art will appreciate that, although some embodiments 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.

[0065] 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 between a battery cell and a pole, characterized in that: The bracket is provided with a first end face facing the pole, and the first end face is provided with a step for accommodating the pole; the bracket is provided with a channel for the pole ear of the battery cell to pass through, and the channel is connected with the step.

2. The bracket according to claim 1, characterized in that: The step is provided with a groove, and the bottom surface of the groove is provided with a through hole.

3. The bracket according to claim 1, characterized in that: In the first direction, the size of the channel is A, and the size of the tab is B, wherein 1≤A / B≤10.

4. The bracket according to claim 1, characterized in that: In the second direction, the dimension of the channel is H, and the dimension of the tab is W, wherein 1.125≤H / W≤10.

5. 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.

6. The bracket according to claim 5, 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.

7. A support frame, characterized in that: The support frame comprises two brackets according to any one of claims 1 to 6 and a connecting piece connecting the two brackets, and the brackets are snap-connected to the connecting piece.

8. The support frame according to claim 7, characterized in that: The connecting members are provided with two and are respectively located at two sides of the bracket in the first direction.

9. A battery, characterized in that: The battery comprises a support frame as claimed in claim 7 or 8.

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