Battery pack structure

Abstract

The embodiment of the utility model discloses a battery pack structure, and relates to the technical field of new energy power batteries. The battery pack structure comprises a shell, a confluence channel, a battery cell assembly, a confluence branch pipe assembly and a plurality of first one-way valves, the shell is provided with a containing space, the confluence channel, the battery cell assembly and the confluence branch pipe assembly are all installed in the containing space, the battery cell assembly comprises a plurality of battery cells arranged in sequence, and each battery cell is provided with an anti-explosion valve; the confluence branch pipe assembly comprises confluence branch pipes in one-to-one correspondence with the battery cells, the first one-way valves are installed in the confluence branch pipes respectively, the first one-way valves are opened towards the confluence channel side, one ends of the confluence branch pipes are communicated with the anti-explosion valve, and the other ends of the confluence branch pipes are communicated with the confluence channel. When a single battery cell is subjected to thermal runaway, eruption substances in the single battery cell can flow into the confluence channel through the single confluence branch pipe and the single first one-way valve, and are discharged to the outside through the confluence channel, so that thermal runaway of other battery cells is avoided.

Description

TECHNICAL FIELD

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

[0002] The current new energy battery package is composed of multiple cell units arranged and combined. Due to the requirement of battery working environment, the battery package needs to seal the internal cells. For a single cell, the cell shell also needs to seal and protect the internal bare cell. When the battery works, due to various unpredictable working conditions or quality defects, it can cause the cell thermal runaway, the internal substances and reaction substances of the cell are ejected outward, and the conductive substances are scattered on the electrodes of other cells, which can cause the short circuit of other cells, thereby causing the thermal runaway of other cells. SUMMARY

[0003] Therefore, it is necessary to provide a battery package structure to solve the problem of cell thermal runaway.

[0004] The utility model provides a battery package structure, including shell, confluence passage, cell subassembly, confluence branch pipe subassembly and a plurality of first check valve, the shell has accommodation space, the confluence passage the cell subassembly with confluence branch pipe subassembly all install in the accommodation space, the cell subassembly includes the cell that arranges in proper order in a plurality, each the cell is equipped with explosion -proof valve, the confluence branch pipe subassembly includes with each the cell one -one correspondence confluence branch pipe, each first check valve is installed in each confluence branch pipe, first check valve opens to confluence passage side, one end of confluence branch pipe is linked with explosion -proof valve, the other end of confluence branch pipe is linked with confluence passage.

[0005] In one embodiment, the diameter of the confluence branch pipe gradually decreases from the end close to the explosion-proof valve to the end close to the confluence passage.

[0006] In one embodiment, the battery package structure further comprises a first sealing member, the first sealing member is arranged between the confluence branch pipe and the explosion-proof valve, and is used for sealing the connection between the confluence branch pipe and the explosion-proof valve.

[0007] In one embodiment, the cell further comprises a protruding structure and a protective patch, the protruding structure is connected with the shell of the cell and communicates with the confluence branch pipe, the protruding structure is connected with the explosion-proof valve and is used for fixing the explosion-proof valve, and the protective patch is attached to the explosion-proof valve.

[0008] In one embodiment, the confluence branch pipe assembly further comprises a plurality of confluence pipes, the two opposite confluence branch pipes communicate with the confluence passage through the confluence pipes, and the first check valve is arranged on the confluence pipe.

[0009] In one embodiment, the battery pack structure further comprises a second sealing member arranged between the manifold and the confluence channel and used for sealing the joint of the manifold and the confluence channel.

[0010] In one embodiment, the first one-way valve comprises a valve body, and an abutting portion and an elastic connecting piece connected to the valve body, one end of the elastic connecting piece being connected to the valve body and the other end being connected to the pipe opening of the manifold so that the abutting portion can abut against the pipe opening of the manifold.

[0011] In one embodiment, the battery pack structure further comprises a tail pipe assembly, the confluence channel being communicated with the tail pipe assembly, and the tail pipe assembly being installed outside the shell.

[0012] In one embodiment, the battery pack structure further comprises a blowing assembly, the blowing assembly comprising a connecting pipe, a second one-way valve, a power supply, a third one-way valve and a blower, the connecting pipe being communicated with the confluence channel and communicated with the outside of the shell, the second one-way valve and the third one-way valve being installed inside the connecting pipe, the second one-way valve and the third one-way valve being opened to the side of the confluence channel, the blower being installed inside the connecting pipe and located between the second one-way valve and the third one-way valve, the power supply being electrically connected with the blower and used for supplying power to the blower, and the blower being used for blowing air to the confluence channel so that the eruption material in the confluence channel is discharged through the tail pipe assembly.

[0013] In one embodiment, the battery pack structure further comprises a suction assembly, the suction assembly being communicated with the tail pipe assembly and used for sucking air to the tail pipe assembly so that the eruption material in the confluence channel is discharged through the tail pipe assembly.

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

[0015] The battery pack exhaust structure has a housing with a containing space, the current collection channel, the battery cell assembly and the current collection branch pipe assembly are all installed in the containing space, the battery cell assembly comprises a plurality of battery cells arranged in sequence, each battery cell is provided with an explosion-proof valve, the current collection branch pipe assembly comprises a current collection branch pipe corresponding to each battery cell, one end of the current collection branch pipe is in communication with the explosion-proof valve, each first one-way valve is installed in each current collection branch pipe, the first one-way valve is opened to the current collection channel side, the other end of the current collection branch pipe is in communication with the current collection channel, so that when thermal runaway occurs in a single battery cell, the eruption material in the single battery cell can flow into the current collection channel through the single current collection branch pipe and the single first one-way valve, and is discharged to the outside through the current collection channel, thereby avoiding thermal runaway of other battery cells. BRIEF DESCRIPTION OF DRAWINGS

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

[0017] Among them:

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

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

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

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

[0022] Figure 5 It is Figure 3 A local enlarged view of part C of the battery pack structure shown.

[0023] Reference signs:

[0024] 1, housing; 11, containing space;

[0025] 2, current collection channel;

[0026] 3, battery cell assembly; 31, explosion-proof valve;

[0027] 4, current collection branch pipe assembly; 41, current collection branch pipe; 42, current collection pipe;

[0028] 5. First one-way valve; 51. Valve body; 52. Abutting portion; 53. Elastic connecting piece;

[0029] 6. First sealing member. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly 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 scope of protection of the utility model.

[0031] It should be noted that: similar signs 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.

[0032] In the description of the utility model, it should be explained that, if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the utility model product is usually placed, 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 particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0033] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] It should be explained that, in the case of no conflict, the features in the embodiments of the utility model can be combined with each other.

[0035] Please combine Figures 1 to 5 with the drawings, the battery pack structure provided by the utility model will be described.

[0036] The battery pack structure comprises an outer shell 1, a current collection channel 2, a battery cell assembly 3, a current collection branch assembly 4 and a plurality of first one-way valves 5, the outer shell 1 has a containing space 11, the current collection channel 2, the battery cell assembly 3 and the current collection branch assembly 4 are all installed in the containing space 11, the battery cell assembly 3 comprises a plurality of battery cells arranged in sequence, each battery cell is provided with an explosion-proof valve 31, the current collection branch assembly 4 comprises a current collection branch 41 corresponding to each battery cell, each first one-way valve 5 is installed in each current collection branch 41, the first one-way valve 5 is opened to the current collection channel 2 side, one end of the current collection branch 41 is communicated with the explosion-proof valve 31, and the other end of the current collection branch 41 is communicated with the current collection channel 2.

[0037] It can be understood that the shell 1 of the battery pack structure has a containing space 11, the current collection channel 2, the battery cell assembly 3 and the current collection branch assembly 4 are all installed in the containing space 11, the battery cell assembly 3 includes a plurality of battery cells arranged in sequence, each battery cell is provided with an explosion-proof valve 31, the current collection branch assembly 4 includes a current collection branch 41 corresponding to each battery cell, one end of the current collection branch 41 is connected with the explosion-proof valve 31, each first one-way valve 5 is respectively installed in each current collection branch 41, the first one-way valve 5 is opened to the current collection channel 2 side, the other end of the current collection branch 41 is connected with the current collection channel 2, the current collection channel 2 is connected with the outside, so that when a single battery cell occurs thermal runaway, the spewing material in the single battery cell will flow into the current collection channel 2 through the single current collection branch 41 and the single first one-way valve 5, and then be discharged to the outside through the current collection channel 2, thereby avoiding thermal runaway of other battery cells.

[0038] It should be noted that the battery pack has a longitudinal beam, and the longitudinal beam is provided with the current collection channel 2.

[0039] In the embodiment, the diameter of the current collection branch 41 gradually decreases from the end close to the explosion-proof valve 31 to the end close to the current collection channel 2. In this way, after the explosion-proof valve 31 breaks, the current collection branch 41 can receive the spewing material of the explosion-proof valve 31 to the greatest extent, so as to accelerate the flow of the spewing material into the current collection branch 41.

[0040] In an embodiment, as shown in Figure 4 The battery pack structure further includes a first sealing member 6, which is arranged between the current collection branch 41 and the explosion-proof valve 31 and is used for sealing the connection between the current collection branch 41 and the explosion-proof valve 31. Specifically, the first sealing member 6 can be a high-temperature sealing ring. By arranging the first sealing member 6, the current collection branch 41 can be sealed with the explosion-proof valve 31 to prevent the spewing material from flowing out.

[0041] Of course, in other embodiments, the battery cell further includes a protruding structure and a protective patch, the protruding structure is connected with the shell of the battery cell and is connected with the current collection branch 41, the protruding structure is connected with the explosion-proof valve 31 and is used for fixing the explosion-proof valve 31, and the protective patch is attached to the explosion-proof valve 31. By arranging the protruding structure to be connected with the shell, the explosion-proof valve 31 is connected with the protruding structure, so that the explosion-proof valve 31 and the shell of the battery cell are sealed through the protruding structure. After the explosion-proof valve 31 breaks, it can break in the protruding structure, so that the explosion-proof valve 31 has a breaking space. The protective patch can protect the explosion-proof valve 31 to avoid damage to the explosion-proof valve 31 during installation.

[0042] In an embodiment, as shown in Figure 5As shown, the current collecting branch pipe assembly 4 further comprises a plurality of current collecting pipes 42, and the opposite two current collecting branch pipes 41 are connected with the current collecting channel 2 through the current collecting pipes 42, and the current collecting pipes 42 are provided with the first one-way valve 5. By arranging the current collecting pipes 42, the opposite two current collecting branch pipes 41 are connected with the current collecting pipes 42, so that the occupied area of the current collecting branch pipes 41 on the current collecting channel 2 can be saved.

[0043] In addition, the current collecting branch pipe 41 is in an arch shape, so that the eruption material in the opposite current collecting branch pipe 41 can flow into the current collecting channel 2 through the current collecting pipe 42, and cannot flow into the opposite current collecting branch pipe 41.

[0044] In the embodiment, the battery pack structure further comprises a second sealing member arranged between the current collecting pipe 42 and the current collecting channel 2 and used for sealing the connection between the current collecting pipe 42 and the current collecting channel 2. Specifically, the second sealing member can be a high-temperature-resistant sealing ring. The second sealing ring can seal the current collecting pipe 42 and the current collecting channel 2, so as to prevent the eruption material in the current collecting pipe 42 from flowing into the battery pack.

[0045] In an embodiment, as shown in Figure 5 The first one-way valve 5 comprises a valve body 51, an abutting portion 52 connected with the valve body 51, and an elastic connecting piece 53 connected with the valve body 51. One end of the elastic connecting piece 53 is connected with the valve body 51, and the other end is connected with the pipe opening of the current collecting pipe 42, so that the abutting portion 52 can abut against the pipe opening of the current collecting pipe 42. Specifically, when the single cell occurs thermal runaway, the pressure in the current collecting branch pipe 41 of the single cell increases, and the air pressure can push away the valve body 51, so that the valve body 51 drives the abutting portion 52 to move and drives the elastic connecting piece 53 to elastically deform, so that the valve body 51 can conduct the current collecting pipe 42. When the pressure in the current collecting branch pipe 41 of the single cell decreases, that is, no eruption material is sprayed into the current collecting branch pipe 41, the deformation of the elastic connecting piece 53 can drive the valve body 51 and the abutting portion 52 to reset, so that the valve body 51 can block the current collecting pipe 42, to prevent the eruption material in the current collecting channel 2 from entering the current collecting pipe 42 again. After the valve body 51 blocks the current collecting pipe 42, the abutting portion 52 can abut against the pipe opening of the current collecting pipe 42, so as to ensure the sealing performance.

[0046] In an embodiment, the battery pack structure further comprises a tail pipe assembly, the current collecting channel 2 is connected with the tail pipe assembly, and the tail pipe assembly is installed outside the shell 1. By arranging the tail pipe assembly, the eruption material in the current collecting channel 2 can be discharged to the outside.

[0047] In the embodiment, the battery pack structure further comprises a blowing assembly, the blowing assembly comprises a connecting pipe, a second one-way valve, a power supply, a third one-way valve and a blower, the connecting pipe is in communication with the converging channel 2 and is in communication with the outside of the shell 1, the second one-way valve and the third one-way valve are both installed in the inside of the connecting pipe, the second one-way valve and the third one-way valve are both opened to the side of the converging channel 2, the blower is installed in the inside of the connecting pipe and is located between the second one-way valve and the third one-way valve, the power supply is electrically connected with the blower and is used to supply power to the blower, and the blower is used to blow air to the converging channel 2, so that the spouting material in the converging channel 2 is discharged through the tail pipe assembly. Specifically, the blower can be a fan. When a single battery cell is in thermal runaway, the explosion-proof valve 31 of the battery cell is opened, the spouting material enters the converging channel 2 through the converging branch pipe 41, at this time, the blower is opened, the external air enters the converging channel 2 through the second one-way valve, the blower and the third one-way valve in the connecting pipe, and the spouting material in the converging channel 2 is discharged to the outside from the tail pipe assembly.

[0048] Of course, in other embodiments, the battery pack structure further comprises a suction assembly, the suction assembly is in communication with the tail pipe assembly and is used to suck air to the tail pipe assembly, so that the spouting material in the converging channel 2 is discharged through the tail pipe assembly. Specifically, the suction assembly can be a negative pressure pump. After the spouting material in the converging channel 2 generates negative pressure through the suction device, it will be discharged to the outside through the tail pipe assembly.

[0049] It should be noted that the first one-way valve 5, the second one-way valve and the third one-way valve can be solenoid valves or mechanical valves.

[0050] The technical features of the above-described embodiments can be combined arbitrarily, in order to make the description simple, 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, it should be considered that it is within the scope of the present disclosure.

[0051] The above disclosure is only the preferred embodiment of the utility model, of course, cannot limit the scope of the utility model right by this, therefore, the equivalent changes made according to the utility model claim still belong to the range covered by the utility model.

Claims

1. A battery pack structure, characterized by, The battery pack structure comprises a shell, a confluence channel, a cell assembly, a confluence branch assembly and a plurality of first one-way valves, the shell has a containing space, the confluence channel, the cell assembly and the confluence branch assembly are all installed in the containing space, the cell assembly comprises a plurality of cells arranged in sequence, each cell is provided with a burst valve, the confluence branch assembly comprises a confluence branch corresponding to each cell, each first one-way valve is installed in each confluence branch, the first one-way valve opens to the confluence channel side, one end of the confluence branch is communicated with the burst valve, and the other end of the confluence branch is communicated with the confluence channel.

2. The battery pack structure of claim 1, wherein, The diameter of the confluence branch gradually decreases from the end close to the burst valve to the end close to the confluence channel.

3. The battery pack structure of claim 1, wherein, The battery pack structure further comprises a first sealing member arranged between the confluence branch and the burst valve and used for sealing the connection between the confluence branch and the burst valve.

4. The battery pack structure of claim 1, wherein, The cell further comprises a protruding structure and a protective patch, the protruding structure is connected with the shell of the cell and communicated with the confluence branch, the protruding structure is connected with the burst valve and used for fixing the burst valve, and the protective patch is attached to the burst valve.

5. The battery pack structure of claim 2, wherein, The confluence branch assembly further comprises a plurality of confluence pipes, and opposite two confluence branches are communicated with the confluence channel through the confluence pipes, and the first one-way valve is arranged on the confluence pipe.

6. The battery pack structure of claim 5, wherein, The battery pack structure further comprises a second sealing member arranged between the confluence pipe and the confluence channel and used for sealing the connection between the confluence pipe and the confluence channel.

7. The battery pack structure of claim 5, wherein, The first one-way valve comprises a valve body, an abutting portion connected with the valve body and an elastic connecting piece, one end of the elastic connecting piece is connected with the valve body, the other end of the elastic connecting piece is connected with the pipe opening of the confluence pipe, so that the abutting portion can abut against the pipe opening of the confluence pipe.

8. The battery pack structure of claim 1, wherein, The battery pack structure further comprises a tail pipe assembly, the confluence channel is communicated with the tail pipe assembly, and the tail pipe assembly is installed outside the shell.

9. The battery pack structure of claim 8, wherein, The battery pack structure further comprises a blowing assembly, the blowing assembly comprises a connecting pipe, a second one-way valve, a power supply, a third one-way valve and a blower, the connecting pipe is communicated with the confluence channel and the outside of the shell, the second one-way valve and the third one-way valve are both installed inside the connecting pipe, the second one-way valve and the third one-way valve both open to the confluence channel side, the blower is installed inside the connecting pipe and located between the second one-way valve and the third one-way valve, the power supply is electrically connected with the blower and used for supplying power to the blower, and the blower is used for blowing air to the confluence channel, so that the eruption material in the confluence channel is discharged through the tail pipe assembly.

10. The battery pack structure of claim 8, wherein, The battery pack structure further comprises an air suction assembly, the air suction assembly is communicated with the tail pipe assembly and used for sucking air from the tail pipe assembly, so that the eruption material in the confluence channel is discharged through the tail pipe assembly.

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