Battery cell fixing support and battery pack

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By staggering the vent holes and explosion-proof valves on the lithium battery cell mounting bracket, combined with independent mounting slots and baffles, the short-circuit problem during thermal runaway of the battery cell is solved, improving the safety and independence of the battery pack.

CN224110417UActive Publication Date: 2026-04-10EVE ENERGY CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: EVE ENERGY CO LTD
Filing Date: 2025-01-24
Publication Date: 2026-04-10

AI Technical Summary

Technical Problem

In existing lithium batteries, the explosion-proof valve and the vent are positioned opposite each other when the cell experiences thermal runaway, causing the ejected material to be ejected directly, which can easily cause short circuits in adjacent cells and affect the safety of the battery pack.

Method used

Design a battery cell fixing bracket with an exhaust port on the mounting slot that is staggered with the battery cell explosion-proof valve. The independent mounting slot and exhaust port form an independent space to ensure that the pressure relief of the battery cell in the event of thermal runaway does not affect the adjacent battery cells. A baffle is used to block the sprayed material.

Benefits of technology

It effectively avoids the impact of ejected material on adjacent cells during thermal runaway of a battery cell, prevents short circuits, and improves the safety and independence of the battery pack.

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Abstract

The utility model provides a battery cell fixing support and a battery pack, the battery cell fixing support comprises a support body, the support body is provided with a mounting groove for mounting a battery cell, and the mounting groove extends along the height direction of the battery cell; an exhaust hole is formed in the mounting groove, is used for releasing pressure of the battery cell, and is staggered with an anti-explosion valve of the battery cell; when the battery cell is subjected to thermal runaway, pressure relief is performed through the exclusive exhaust hole, and the exhaust hole and the anti-explosion valve of the battery cell are arranged in a staggered manner, so that direct opposite spraying when the battery cell is subjected to thermal runaway is avoided, and the safety performance of the battery cell is ensured.

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Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, concretely relates to a fixed support of electric core and battery package. BACKGROUND

[0002] In the related art, multiple electric cores are arranged in the lithium battery, and the cylindrical electric cores are arranged in the vertical direction and fixed by foaming glue. In the related art, the explosion-proof valve on the electric core fixing support is arranged opposite to the exhaust hole. Therefore, when the electric core is in thermal runaway, the explosion-proof valve is opened, and the spray directly sprays out of the exhaust hole. The spray speed is high, and the spray is easy to contact with other substances. Therefore, when a single electric core is in thermal runaway, the adjacent electric core is easy to be affected, thereby causing the short circuit of the battery package. SUMMARY

[0003] The embodiment of the utility model provides a kind of electric core fixing support, can improve the technical problem that electric core is easy to cause battery package short circuit phenomenon when in thermal runaway.

[0004] In the first aspect, the embodiment of the utility model provides a kind of electric core fixing support, comprising:

[0005] Support body, the support body is equipped with the installation groove for installing electric core, the installation groove extends along the height direction of electric core;The installation groove is equipped with exhaust hole, and the exhaust hole is used for the pressure relief of electric core, and is arranged in dislocation with the explosion-proof valve of electric core.

[0006] In an embodiment, the installation groove is equipped with multiple, the exhaust hole is located between the two side walls of the installation groove, and the width of the exhaust hole is less than the width of the installation groove.

[0007] In an embodiment, the exhaust hole is at least partially located in the side wall of the installation groove, and an exhaust gap is provided between the exhaust hole and the explosion-proof valve of the electric core.

[0008] In an embodiment, the exhaust hole is at least partially located in the bottom wall of the installation groove, and an exhaust gap is provided between the exhaust hole and the explosion-proof valve of the electric core.

[0009] In an embodiment, the exhaust hole includes a first area and a second area that are in communication with each other, the first area is located in the side wall of the installation groove, the second area is located in the bottom wall of the installation groove, and an exhaust gap is provided between the first area and the second area and the explosion-proof valve of the electric core.

[0010] In an embodiment, along the axial direction of the electric core, the ratio of the height of the first area to the height of the electric core is 3:25;And / or, the installation groove is arranged in a circular shape and used for installing a circular electric core, the center of the electric core is taken as the center, and the arc of the first area is 30°-50°.

[0011] In an embodiment, a ratio of a length of the second region to a width of the battery cell is 2:5 along a radial direction of the battery cell, and / or a ratio of a width of the second region to a height of the battery cell is 1:10 along an axial direction of the battery cell.

[0012] In an embodiment, the battery cell fixing support further comprises a plurality of blocking strips, the plurality of blocking strips are installed on the installation groove, and are configured to be arranged opposite to the explosion-proof valve of the battery cell.

[0013] In an embodiment, the blocking strip protrudes from a groove bottom of the installation groove, and the blocking strip is arranged spaced apart from the explosion-proof valve of the battery cell.

[0014] In a second aspect, an embodiment of the utility model provides a battery pack, comprising a battery cell and the battery cell fixing support, the battery cell is installed on the battery cell fixing support.

[0015] In an embodiment, the installation groove is provided with at least two rows, and the exhaust holes on the adjacent two rows of installation grooves are arranged away from each other.

[0016] The embodiment of the utility model has the advantages of:

[0017] Through the arrangement of the exhaust hole, when the battery cell is in thermal runaway, pressure relief is performed through the exclusive exhaust hole, and the exhaust hole is arranged in a staggered manner with the explosion-proof valve of the battery cell, so that direct spraying of the battery cell in thermal runaway is avoided, and the safety performance of the battery cell is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is a three-dimensional schematic view of a battery cell fixing support provided by the embodiment of the utility model;

[0020] Figure 2 It is a three-dimensional schematic view of another view direction of a battery cell fixing support provided by the embodiment of the utility model;

[0021] Figure 3 It is a top view of a battery cell fixing support provided by the embodiment of the utility model;

[0022] Figure 4 It is a three-dimensional schematic view of a battery cell fixing support provided by the embodiment of the utility model; Figure 2 A local enlarged view of A;

[0023] Figure 5is on Figure 3 A local enlarged view at B.

[0024] Reference numerals

[0025] 1, support body; 11, mounting groove; 12, welding hole;

[0026] 2, exhaust hole; 21, first region; 22, second region;

[0027] 3, blocking strip;

[0028] 4, first connecting part;

[0029] 5, second connecting part;

[0030] 6, partition plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'up' and 'down' are generally used for indicating the up and down in the actual use or working state of the device, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0032] With reference to Figures 1 to 3 The utility model provides a kind of electric core fixing support, including support body 1;

[0033] The support body 1 is equipped with the mounting groove 11 for installing electric core, the mounting groove 11 extends along the height direction of electric core;The mounting groove 11 is equipped with exhaust hole 2, and the exhaust hole 2 is used for the pressure relief of electric core, and is arranged in staggered position with the explosion-proof valve of electric core.

[0034] In the embodiment, the support body 1 is used to install circular electric core, i.e. the mounting groove 11 is all set as circular mounting groove 11.

[0035] By the setting of exhaust hole 2, when electric core occurs thermal runaway, pressure relief is carried out through exclusive exhaust hole 2, and exhaust hole 2 is arranged in staggered position with the explosion-proof valve of electric core, to avoid direct spraying when electric core occurs thermal runaway, guarantee the safety performance of electric core.

[0036] Meanwhile, in the embodiment, the plurality of battery cells are installed one by one in the plurality of installation grooves 11, and the plurality of installation grooves 11 are arranged in rows and columns, and the plurality of exhaust holes 2 on the installation grooves 11 are arranged at intervals, so that each battery cell can be completely separated and independent, and a single channel is formed, so that when a single battery cell is in thermal runaway and pressure relief, the adjacent battery cell is not affected, and the short circuit of other battery cells caused by the thermal runaway of a single battery cell is avoided, and the safety of the entire battery pack is ensured.

[0037] In summary, in the embodiment of the utility model, through the setting of the plurality of independent installation grooves 11 and the plurality of exhaust holes 2, an independent space can be formed, so that the technical problem that a single battery cell is in thermal runaway and easily affects the adjacent battery cell, leading to the short circuit of the entire battery pack, is improved.

[0038] In an embodiment, referring to Figures 1 to 3 , the installation groove 11 is provided with a plurality of exhaust holes 2 between the two side walls of the installation groove 11, and the width of the exhaust hole 2 is smaller than the width of the installation groove 11. That is to say, in the embodiment, the exhaust holes 2 on the two adjacent installation grooves 11 are complementary and communicated, so that when a single battery cell is in thermal runaway and pressure relief, the adjacent battery cell is not affected, and the short circuit of other battery cells caused by the thermal runaway of a single battery cell is avoided, and the safety of the entire battery pack is ensured.

[0039] In an embodiment, referring to Figure 4 , the exhaust hole 2 is at least partially located on the side wall of the installation groove 11, and the exhaust gap is provided between the exhaust hole 2 and the explosion-proof valve of the battery cell. Accordingly, when the battery cell is in thermal runaway, the battery cell is pressure relieved through the exhaust hole 2 located on the side wall, so as to avoid direct spraying when the battery cell is in thermal runaway, and ensure the safety performance of the battery cell. Meanwhile, in the embodiment, since the installation grooves 11 are independent and not communicated with each other, when the battery cell is in thermal runaway and pressure relief, other battery cells are not affected, and the short circuit of other battery cells is avoided.

[0040] In an embodiment, referring to Figure 4 , the exhaust hole 2 is at least partially located on the bottom wall of the installation groove 11, and the exhaust gap is provided between the exhaust hole 2 and the explosion-proof valve of the battery cell. Accordingly, when the battery cell is in thermal runaway, the battery cell is pressure relieved through the exhaust hole 2 located on the bottom wall, so as to avoid direct spraying when the battery cell is in thermal runaway, and ensure the safety performance of the battery cell. Meanwhile, in the embodiment, since the installation grooves 11 are independent and not communicated with each other, when the battery cell is in thermal runaway and pressure relief, other battery cells are not affected, and the short circuit of other battery cells is avoided.

[0041] In an embodiment, referring to Figure 4The exhaust hole 2 comprises a first area 21 and a second area 22 which are in communication with each other, the first area 21 is located on the side wall of the mounting groove 11, the second area 22 is located on the bottom wall of the mounting groove 11, and the first area 21 and the second area 22 are provided with an exhaust gap between the explosion-proof valve of the battery cell. When the battery cell occurs thermal runaway pressure relief, the first area 21 and the second area 22 are used for pressure relief, which avoids direct spraying when the battery cell occurs thermal runaway, and ensures the safety performance of the battery cell. Since the first area 21 and the second area 22 are located on two surfaces of the mounting groove 11 respectively, the battery cell can be exhausted and relieved from two directions when the battery cell occurs thermal runaway, thereby accelerating the pressure relief efficiency, avoiding affecting the remaining battery cells, and further ensuring the safety performance of the battery cell.

[0042] In an embodiment, along the axial direction of the battery cell, the ratio of the height of the first area 21 to the height of the battery cell is 3:25. Therefore, the height of the first area 21 can be ensured to be sufficient, so that the battery cell can smoothly realize the pressure relief process in the first area 21, and the use safety of the battery is ensured.

[0043] In an embodiment, the mounting groove 11 is circular and is used for the installation of a circular battery cell, the center of the battery cell is taken as the center of the circle, and the arc of the first area 21 is 30°-50°. Therefore, the width of the first area 21 can be ensured to be sufficient, so that the battery cell can smoothly realize the pressure relief process in the first area 21, and the use safety of the battery is ensured.

[0044] In an embodiment, along the axial direction of the battery cell, the ratio of the height of the first area 21 to the height of the battery cell is 3:25; the mounting groove 11 is circular and is used for the installation of a circular battery cell, the center of the battery cell is taken as the center of the circle, and the arc of the first area 21 is 30°-50°. Therefore, the width and height of the first area 21 can be ensured to be sufficient, so that the battery cell can smoothly realize the pressure relief process in the first area 21, and the use safety of the battery is ensured. In this embodiment, the height of the first area 21 is 6.2 mm, and the diameter of the battery cell is 47 mm.

[0045] In an embodiment, along the radial direction of the battery cell, the ratio of the length of the second area 22 to the width of the battery cell is 2:5. Therefore, the length of the second area 22 can be ensured to be sufficient, so that the battery cell can smoothly realize the pressure relief process in the second area 22, and the use safety of the battery is ensured.

[0046] In this embodiment, the length of the second area 22 is 18 mm, and the diameter of the battery cell is 47 mm.

[0047] In an embodiment, the ratio of the width of the second region 22 to the height of the battery cell along the axial direction of the battery cell is 1:10. Thus, the width of the second region 22 can be ensured to be sufficient, so that the battery cell can smoothly implement the pressure relief process from the second region 22, and the safety of the battery can be ensured.

[0048] In the embodiment, the width of the second region 22 is 4.3 mm, and the diameter of the battery cell is 47 mm.

[0049] In an embodiment, the ratio of the length of the second region 22 to the width of the battery cell along the radial direction of the battery cell is 2:5, and the ratio of the width of the second region 22 to the height of the battery cell along the axial direction of the battery cell is 1:10. Thus, the length and the width of the second region 22 can be ensured to be sufficient, so that the battery cell can smoothly implement the pressure relief process from the second region 22, and the safety of the battery can be ensured.

[0050] In an embodiment, the battery cell fixing support further comprises a plurality of blocking strips 3, which are installed on the mounting groove 11 and are arranged opposite to the explosion-proof valve of the battery cell. It can be understood that, in the embodiment, the blocking strip 3 is located on the bottom wall of the mounting groove 11. The blocking strip 3 is arranged at the bottom of the mounting groove 11. When one of the battery cells directly sprays due to thermal runaway, the explosion-proof valve is opened, and the blocking strip 3 can block the spray of the explosion-proof valve. Thus, the spray can be prevented from contacting other components to cause a short circuit, and the safety of the battery pack can be further improved.

[0051] In an embodiment, the blocking strip 3 protrudes from the groove bottom of the mounting groove 11, and the blocking strip 3 is arranged in a spaced manner from the explosion-proof valve of the battery cell. Thus, the blocking strip 3 can be prevented from blocking the explosion-proof valve of the battery cell, and the safety of the battery cell can be ensured when the explosion-proof valve is opened due to thermal runaway.

[0052] In an embodiment, the battery cell fixing support further comprises a first connecting portion 4, which is connected to the support body 1 and is used to connect a first module.

[0053] It should be further noted that, in other embodiments, the specific type of the first module can also be selected according to actual needs, and the utility is strong.

[0054] It can be understood that, in some embodiments, a plurality of first connecting portions 4 can also be arranged on one side of the support body 1.

[0055] In an embodiment, the battery cell fixing support further comprises a second connecting portion 5, which is connected to the support body 1 and is used to connect a second module.

[0056] It should be noted that in other embodiments, the specific type of the second module can also be selected according to actual needs, and the practicability is high.

[0057] It can be understood that in some embodiments, a plurality of second connecting portions 5 can also be arranged on one side of the support body 1.

[0058] In an embodiment, the first connecting portion 4 and the second connecting portion 5 are connected on the same side of the support body 1, and a partition plate 6 is arranged between the first connecting portion 4 and the second connecting portion 5. In this embodiment, since the first connecting portion 4 and the second connecting portion 5 are arranged on the same side, the partition plate 6 is arranged between the first connecting portion 4 and the second connecting portion 5, which can avoid interference between the first connecting portion 4 and the second connecting portion 5, prevent the wire harness between different modules from overlapping to cause interference, and ensure the normal use between different modules.

[0059] In addition, when specifically arranged, the first connecting portion 4 and the second connecting portion 5 can be arranged in a stepped shape to further avoid interference after the first connecting portion 4 and the second connecting portion 5 connect the remaining modules, and to avoid affecting the internal space of the battery.

[0060] It should be noted that when specifically arranged, the first connecting portion 4 and the second connecting portion 5 can be arranged on one side of the support body, and the first connecting portion 4 and the second connecting portion 5 can be arranged on the other side of the support body; the first connecting portion 4 and the second connecting portion 5 can be arranged on one side of the support body, and the first connecting portion 4 can be arranged on the other side of the support body; or the first connecting portion 4 and the second connecting portion 5 can be arranged on one side of the support body, and the second connecting portion 5 can be arranged on the other side of the support body.

[0061] Of course, in an embodiment, the first connecting portion 4 and the second connecting portion 5 can be connected on opposite sides of the support body 1, respectively. Therefore, the partition plate 6 does not need to be arranged on the support, and interference between the first connecting portion 4 and the second connecting portion 5 can also be avoided.

[0062] In a second aspect, the application also provides a battery pack, which comprises a battery cell and a battery cell fixing support, and the battery cell is mounted on the battery cell fixing support.

[0063] The battery pack has all the beneficial effects of the battery cell fixing support described above.

[0064] By the arrangement of the exhaust hole 2, when the battery cell is in thermal runaway, the pressure relief is carried out through the exclusive exhaust hole 2, and the exhaust hole 2 is arranged in a staggered manner with the explosion-proof valve of the battery cell, thereby avoiding direct spraying when the battery cell is in thermal runaway, and ensuring the safety performance of the battery cell; meanwhile, in the embodiment, the plurality of battery cells are one-to-one corresponding installed in the respective installation grooves 11, since the plurality of installation grooves 11 are arranged in rows and the exhaust holes 2 on the plurality of installation grooves 11 are arranged in intervals, therefore the respective battery cells can be completely separated and independent, forming a single channel, when a single battery cell is in thermal runaway and pressure relief, it will not affect the adjacent battery cell, and can avoid the short circuit of other battery cells caused by the thermal runaway of a single battery cell, thereby ensuring the safety of the entire battery pack.

[0065] In summary, in the embodiment of the present application, the independent installation groove 11 and the exhaust hole 2 are arranged to form an independent space, thereby improving the technical problem that a single battery cell in thermal runaway easily affects the adjacent battery cell and causes the short circuit of the entire battery pack.

[0066] In an embodiment, the installation groove 11 is provided with at least two rows, and in order to avoid interference, the exhaust holes 2 on the adjacent two rows of installation grooves 11 are arranged in a facing away manner.

[0067] In an embodiment, referring to Figure 5 Further comprising a bus bar, the bottom of the installation groove 11 is provided with a welding hole 12, and is used for welding the battery cell and the bus bar. Therefore, by avoiding the hole in the bottom of the installation groove 11 of the bracket body 1, the welding work of the battery cell and the bus bar can be facilitated, thereby avoiding the interference of the bracket body 1 to the welding process. In the embodiment, the welding hole 12 is used for welding the pole of the battery cell and the bus bar.

[0068] In the specific arrangement, the size of the welding hole 12 can be arranged according to the actual welding area size required by the pole of the battery cell and the bus bar.

[0069] In an embodiment, along the radial direction of the battery cell, the ratio of the maximum width of the welding hole 12 to the diameter of the battery cell is 1:2.

[0070] In the embodiment, the maximum width of the welding hole 12 is 25mm, and the diameter of the battery cell is 47mm.

[0071] The above has carried on the detailed introduction to the embodiment of the present application, the principle and implementation mode of the present application are described in this paper, and the above embodiment is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A battery cell fixing bracket, characterized in that, The application relates to a fixing support for fixing a battery cell. The fixing support comprises a fixing support body provided with a fixing groove for fixing the battery cell, wherein the fixing groove extends along the height direction of the battery cell; the fixing groove is provided with an exhaust hole for pressure relief of the battery cell and is arranged in a staggered mode with the explosion-proof valve of the battery cell.

2. The cell fixing support of claim 1, wherein The fixing groove is provided with a plurality of exhaust holes located between the two side walls of the fixing groove, and the width of the exhaust hole is smaller than the width of the fixing groove.

3. The cell fixation support of claim 1, wherein The exhaust hole is located at least partially on the side wall of the fixing groove, and an exhaust gap is arranged between the exhaust hole and the explosion-proof valve of the battery cell.

4. The cell fixation bracket of claim 1, wherein The exhaust hole is located at least partially on the bottom wall of the fixing groove, and an exhaust gap is arranged between the exhaust hole and the explosion-proof valve of the battery cell.

5. The cell fixation bracket of claim 1, wherein The exhaust hole comprises a first area and a second area which are in communication with each other, the first area is located on the side wall of the fixing groove, the second area is located on the bottom wall of the fixing groove, and an exhaust gap is arranged between the first area and the second area and the explosion-proof valve of the battery cell.

6. The cell fixation bracket of claim 5, wherein Along the axial direction of the battery cell, the ratio of the height of the first area to the height of the battery cell is 3:25; and / or the fixing groove is circular and is used for fixing a circular battery cell, the center of the battery cell is taken as the center of the circle, and the arc of the first area is 30-50 degrees.

7. The cell fixation bracket of claim 5, wherein Along the radial direction of the battery cell, the ratio of the length of the second area to the width of the battery cell is 2:5; and / or along the axial direction of the battery cell, the ratio of the width of the second area to the height of the battery cell is 1:

10.

8. The cell fixation bracket of any one of claims 1-7, wherein, The fixing support further comprises a plurality of blocking strips which are arranged on the fixing groove and are used for being arranged opposite to the explosion-proof valve of the battery cell.

9. The cell fixation bracket of claim 8, wherein, The blocking strip protrudes from the groove bottom of the fixing groove, and the blocking strip is arranged in a spaced mode with the explosion-proof valve of the battery cell.

10. A battery pack, characterized by, The application further relates to a battery cell and a fixing support for fixing the battery cell, wherein the battery cell is arranged on the fixing support.

11. The battery pack of claim 10, wherein, The fixing groove is provided with at least two rows, and the exhaust holes on the two adjacent rows of the fixing groove are arranged in a facing-away mode.