Battery pack structure

Abstract

The embodiment of the utility model discloses a battery pack structure, and relates to the technical field of new energy batteries. The battery pack structure comprises at least one battery cell, an anti-explosion valve and a channel, a shell of the battery cell is provided with a mounting hole, the channel is arranged outside the shell and communicated with the mounting hole, the mounting hole is provided with the anti-explosion valve, and when the interior of the single battery cell is abnormal, the anti-explosion valve is exploded, so that gas or fire in the single battery cell can be discharged from the channel through the mounting hole, and the safety of the battery cell is improved. Therefore, the influence on other battery cells is avoided, the flammable phenomenon of the new energy automobile is prevented, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field especially relates to a battery package structure. BACKGROUND

[0002] The existing single cell, although having the safety fire discharge of setting the explosion -proof valve, can only discharge the abnormal gas (the fire caused by the explosion) through the explosion of the explosion -proof valve of the single cell, but the cells among each other cannot exclude the joint effect, secondly, when the single battery appears abnormal, cannot normally discharge the gas / fire outside the battery, indirectly leads to the flammable phenomenon of new energy automobile. SUMMARY

[0003] Therefore, it is necessary to provide a battery package structure, which aims to solve the technical problem that the existing single cell, although having the safety fire discharge of setting the explosion -proof valve, can only discharge the abnormal gas (the fire caused by the explosion) through the explosion of the explosion -proof valve of the single cell, but the cells among each other cannot exclude the joint effect, secondly, when the single battery appears abnormal, cannot normally discharge the gas / fire outside the battery, indirectly leads to the flammable phenomenon of new energy automobile.

[0004] The utility model provides a battery package structure, including at least one cell, explosion -proof valve and passageway, the shell of cell is provided with mounting hole, the passageway is outside the shell with the mounting hole is linked together, the mounting hole is provided with explosion -proof valve.

[0005] In one embodiment, the battery package structure further comprises a fixing member having a through hole, the through hole being in communication between the mounting hole and the passageway.

[0006] In one embodiment, the inner wall of the through hole has a stepped surface, and the explosion -proof valve is mounted on the stepped surface.

[0007] In one embodiment, the explosion -proof valve is mounted on the hole wall of the mounting hole.

[0008] In one embodiment, the fixing member is integrally formed with the shell, or the fixing member is separately formed with the shell.

[0009] In one embodiment, the passageway comprises a busbar channel and a busbar branch pipe, one end of the busbar branch pipe being in communication with the busbar channel, and the other end being in communication with the through hole.

[0010] In one embodiment, the battery package structure further comprises a one-way valve, the one-way valve being mounted on the busbar branch pipe, and the one-way valve being in communication from the side facing the through hole to the side away from the through hole.

[0011] In one embodiment, the one-way valve comprises a valve body and an elastic connecting piece, one end of the elastic connecting piece is connected with the valve body, the other end is connected with the wall surface of the converging channel, the valve body is arranged on the converging branch pipe, the valve body is arranged to be flipped away from the side of the through hole when the driving force received by the valve body on the side of the through hole is greater than a preset value, to open the converging branch pipe, and to elastically deform the elastic connecting piece to generate a driving force for resetting the valve body.

[0012] In one embodiment, the converging branch pipe is provided with a first inclined surface near one end of the fixing member, the fixing member is provided with a second inclined surface near one end of the converging branch pipe, and the first inclined surface abuts against the second inclined surface.

[0013] In one embodiment, the battery pack structure further comprises a protective sheet, and the protective sheet is attached to the explosion-proof valve.

[0014] The embodiments of the present application have the following beneficial effects:

[0015] The battery pack structure has the following beneficial effects: the shell of the battery cell is provided with a mounting hole, the channel is arranged outside the shell and is in communication with the mounting hole, the mounting hole is provided with an explosion-proof valve, when an abnormality occurs in a single battery cell, the explosion-proof valve is broken, so that the gas or fire in the single battery cell can be discharged to the outside through the channel via the mounting hole, thereby avoiding affecting other battery cells, preventing the new energy vehicle from catching fire, and improving safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0017] Among them:

[0018] Figure 1 It is an axial view of the battery pack structure in one embodiment.

[0019] Figure 2 It is Figure 1 It is a side view of the battery pack structure shown.

[0020] Figure 3 It is Figure 2 It is a sectional view of the battery pack structure shown in the A-A direction.

[0021] Figure 4 It is Figure 3A partial enlarged view of part B in the battery pack structure shown.

[0022] Figure 5 A front view of the battery pack structure in one embodiment.

[0023] Figure 6 A front view of the battery pack structure shown. Figure 5 A sectional view in the direction of C-C in the battery pack structure shown.

[0024] Figure 7 A front view of the battery pack structure shown. Figure 6 A partial enlarged view of part D in the battery pack structure shown.

[0025] Figure 8 A side view of the battery pack structure in one embodiment.

[0026] Figure 9 A side view of the battery pack structure shown. Figure 8 A sectional view in the direction of E-E in the battery pack structure shown.

[0027] Figure 10 A side view of the battery pack structure shown. Figure 9 A partial enlarged view of part F in the battery pack structure shown.

[0028] Reference signs:

[0029] 1, cell; 11, mounting hole;

[0030] 2, explosion-proof valve;

[0031] 3, channel; 31, converging channel; 32, converging branch; 321, first inclined surface;

[0032] 4, fixing member; 41, through hole; 411, stepped surface; 42, second inclined surface;

[0033] 5, one-way valve; 51, valve body; 52, elastic connecting piece;

[0034] 6, protective sheet. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] In the description of the utility model, it needs to be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model.

[0038] In addition, if the terms "first", "second" and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0040] Please combine Figures 1-10 The battery pack structure provided by the utility model will be described.

[0041] The battery pack structure comprises at least one battery cell 1, an explosion-proof valve 2 and a channel 3, the shell of the battery cell 1 is provided with a mounting hole 11, the channel 3 is externally arranged on the shell and communicates with the mounting hole 11, and the mounting hole 11 is provided with the explosion-proof valve 2.

[0042] It can be understood that the shell of the battery cell 1 of the battery pack structure is provided with a mounting hole 11, the channel 3 is externally arranged on the shell and communicates with the mounting hole 11, and the mounting hole 11 is provided with the explosion-proof valve 2, when an abnormality occurs inside a single battery cell 1, the explosion-proof valve 2 is blown up, so that the gas or fire in the single battery cell 1 can be discharged to the outside through the mounting hole 11 from the channel 3, thereby avoiding affecting other battery cells 1, preventing the new energy automobile from appearing flammable, and improving safety.

[0043] In addition, the explosion-proof valve 2 can be protruded in the channel 3 to realize explosion, so that the explosion-proof valve 2 has a protruding space, which can ensure that the gas or fire is normally discharged outside the battery pack.

[0044] In the embodiment, the battery pack structure further comprises a fixing piece 4, the fixing piece 4 has a through hole 41, and the through hole 41 communicates between the mounting hole 11 and the channel 3. By arranging the fixing piece 4, the fixing piece 4 is provided with the through hole 41, so that the explosion-proof valve 2 has a protruding space after explosion, so that the gas can be normally discharged and will not be hindered, improving safety.

[0045] In an embodiment, as shown in Figures 1-7 The installation of the explosion-proof valve 2 has various embodiments:

[0046] In an embodiment, the inner wall of the through hole 41 has a stepped surface 411, and the explosion-proof valve 2 is installed on the stepped surface 411. Specifically, the explosion-proof valve 2 is fixed on the stepped surface 411, so that the explosion-proof valve 2 can be fixed.

[0047] In another embodiment, the explosion-proof valve 2 is installed on the hole wall of the mounting hole 11. Specifically, the explosion-proof valve 2 is fixed on the hole wall of the mounting hole 11, so that the explosion-proof valve 2 can be fixed.

[0048] In an embodiment, as shown in Figure 4 , Figure 7 and Figure 10 , the fixing member 4 has various connection modes with the shell:

[0049] In an embodiment, the fixing member 4 is integrally formed with the shell.

[0050] In another embodiment, the fixing member 4 is formed separately from the shell.

[0051] Specifically, as shown in Figure 7 , the fixing member 4 is provided with a protrusion, the protrusion is arranged around the outer periphery of the fixing member 4, the hole wall of the mounting hole 11 is provided with a groove away from the outside of the shell, and the protrusion is installed in the groove. Specifically, the protrusion abuts against the groove wall, so that the fixing member 4 can be fixed on the shell.

[0052] As shown in Figure 4 , the fixing member 4 is provided with a protrusion, the protrusion is arranged around the end of the fixing member 4, and the outside of the shell is provided with a groove, and the protrusion is installed in the groove. Specifically, after the protrusion is installed in the groove, welding is performed, so that the fixing member 4 can be fixed on the shell.

[0053] In an embodiment, as shown in Figure 4 , the channel 3 includes a converging channel 31 and a converging branch pipe 32, one end of the converging branch pipe 32 is communicated with the converging channel 31, and the other end is communicated with the through hole 41. After the explosion-proof valve 2 explodes, the gas can flow into the converging channel 31 through the converging branch pipe 32, which can avoid the current battery cell 1 from affecting other battery cells 1 after thermal runaway, thereby improving safety.

[0054] In this embodiment, the battery pack structure further includes a one-way valve 5, the one-way valve 5 is installed on the converging branch pipe 32, and the one-way valve 5 conducts from the side facing the through hole 41 to the side away from the through hole 41. When the battery cell 1 is abnormal, the explosion-proof valve 2 is opened, the gas will flow into the converging branch pipe 32 through the mounting hole 11 and the through hole 41, the one-way valve 5 is opened, so that the gas in the converging branch pipe 32 is discharged to the outside of the battery pack through the converging channel 31. In addition, due to the arrangement of the one-way valve 5, when the exhaust or fire occurs, the one-way valve 5 can avoid secondary damage (backfire) to the battery cell 1.

[0055] Further, the one-way valve 5 comprises a valve body 51 and an elastic connecting piece 52, one end of the elastic connecting piece 52 is connected with the valve body 51, the other end is connected with the wall surface of the converging channel 31, the valve body 51 is arranged on the converging branch pipe 32, the valve body 51 is arranged to be turned away from the side of the through hole 41 when the driving force received by the valve body 51 on the side of the through hole 41 is greater than a preset value, the converging branch pipe 32 is opened, and the elastic connecting piece 52 is elastically deformed to generate a driving force for driving the valve body 51 to reset. When the abnormality occurs in the battery cell 1, the explosion-proof valve 2 is opened, the gas flows into the converging branch pipe 32 through the mounting hole 11 and the through hole 41, and the gas can push open the valve body 51 due to the pressure in the converging branch pipe 32 being greater than the pressure in the converging channel 31, the valve body 51 drives the elastic connecting piece 52 to elastically deform, and the gas in the converging branch pipe 32 is discharged to the outside of the battery pack through the converging channel 31, and when the gas is discharged, the deformation force of the elastic connecting piece 52 drives the valve body 51 to reset, so that the valve body 51 blocks the converging branch pipe 32, thereby avoiding the influence of the external environment on the battery cell 1.

[0056] Further, the converging branch pipe 32 is provided with a first inclined surface 321 close to the fixing member 4, the fixing member 4 is provided with a second inclined surface 42 close to the converging branch pipe 32, and the first inclined surface 321 abuts against the second inclined surface 42. Through the abutment of the first inclined surface 321 and the second inclined surface 42, the inclined engagement structure of the fixing member 4 and the converging branch pipe 32 is formed, thereby avoiding the gas flowing to the outside of the channel 3 to avoid damaging other battery cells 1.

[0057] Of course, in other embodiments, the first inclined surface 321 and the second inclined surface 42 are welded, thereby ensuring the sealing of the fixing member 4 and the converging branch pipe 32.

[0058] In an embodiment, as shown in Figure 4 The battery pack structure further comprises a protective sheet 6, and the protective sheet 6 is attached to the explosion-proof valve 2. Through the arrangement of the protective sheet 6, the explosion-proof valve 2 can be protected, thereby avoiding damage to the explosion-proof valve 2 during installation.

[0059] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0060] The above disclosure is only the preferred embodiment of the present application, and of course cannot limit the scope of the present application, therefore, the equivalent changes made according to the claims of the present application still belong to the scope of the present application.

Claims

1. A battery pack structure, characterized by, The battery pack structure comprises at least one electric core, an explosion-proof valve and a channel, the shell of the electric core is provided with a mounting hole, the channel is externally arranged on the shell and communicates with the mounting hole, and the mounting hole is provided with the explosion-proof valve.

2. The battery pack structure of claim 1, wherein, The battery pack structure further comprises a fixing member, and the fixing member has a through hole which communicates between the mounting hole and the channel.

3. The battery pack structure of claim 2, wherein, An inner wall of the through hole has a stepped surface, and the explosion-proof valve is mounted on the stepped surface.

4. The battery pack structure of claim 2, wherein, The explosion-proof valve is mounted on a hole wall of the mounting hole.

5. The battery pack structure according to claim 3 or 4, characterized by, The fixing member is integrally formed with the shell or separately formed with the shell.

6. The battery pack structure of claim 2, wherein, The channel comprises a converging channel and a converging branch pipe, one end of the converging branch pipe communicates with the converging channel, and the other end communicates with the through hole.

7. The battery pack structure of claim 6, wherein, The battery pack structure further comprises a one-way valve, and the one-way valve is mounted on the converging branch pipe.

8. The battery pack structure of claim 7, wherein, The one-way valve comprises a valve body and an elastic connecting piece, one end of the elastic connecting piece is connected with the valve body, and the other end is connected with a wall surface of the converging channel.

9. The battery pack structure of claim 6, wherein, The valve body is arranged on the converging branch pipe, and the valve body is arranged to be flipped to a side away from the through hole when a driving force received by the valve body on a side facing the through hole is greater than a preset value, so as to open the converging branch pipe and make the elastic connecting piece elastically deform to generate a driving force for resetting the valve body.

10. The battery pack structure according to any one of claims 1 to 4, characterized by, The converging branch pipe is provided with a first inclined surface at one end close to the fixing member, the fixing member is provided with a second inclined surface at one end close to the converging branch pipe, and the first inclined surface abuts against the second inclined surface. The battery pack structure further comprises a protection piece, and the protection piece is attached to the explosion-proof valve.

Images