CN220138558U - Battery pack box and battery pack - Google Patents
Battery pack box and battery pack Download PDFInfo
- Publication number
- CN220138558U CN220138558U CN202321387132.5U CN202321387132U CN220138558U CN 220138558 U CN220138558 U CN 220138558U CN 202321387132 U CN202321387132 U CN 202321387132U CN 220138558 U CN220138558 U CN 220138558U
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- battery pack
- bottom plate
- partition
- channel
- passage
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- 238000005192 partition Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 59
- 238000004880 explosion Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Abstract
The utility model relates to the technical field of battery packs, in particular to a battery pack box and a battery pack, and aims to solve the problem that pressure and heat are unevenly distributed in the box in the process of discharging high-temperature and high-pressure gas in the battery pack. For this purpose, the battery pack box comprises a side wall component and a partition, wherein a first channel is arranged in the partition, a first air inlet hole communicated with the first channel is formed in the lower surface of the partition, a first air outlet hole is formed in the end face of the partition, and the first air outlet hole is communicated with a second channel in the side wall component. The present utility model provides a battery pack comprising: the battery pack box and the battery cell module are described above. The thermal runaway gas is discharged through the first channel and the second channel, the heat and the pressure of the gas are uniformly distributed on the box body, the deformation condition of the box body caused by uneven heating and pressure is reduced, and the service life of the box body is prolonged.
Description
Technical Field
The utility model relates to the technical field of battery packs, and particularly provides a battery pack box and a battery pack.
Background
The battery pack is a core component of the new energy automobile. A conventional battery pack structure includes a housing and a plurality of battery cells disposed within the housing. The energy density of the battery cell is high, and heat is generated during operation. When the cell is thermally out of control, high temperature and high pressure gas is generated. If these high temperature gases cannot be discharged from the battery pack in time, the battery cells may be ignited, and the fire may spread to other battery cells in the battery pack or burn through the battery pack case. Moreover, the high-temperature gas has high gas pressure, which is liable to damage other components of the battery pack.
The prior art typically provides an air passage in the housing to allow the gas to escape through the air passage. But a large amount of high temperature and high pressure gas is concentrated through the gas passage, resulting in concentration of pressure and heat of the gas near the gas passage. Under the condition of uneven heating or pressure, the box body structure is easy to deform, and the strength of the box body is reduced, and even the box body is cracked and damaged.
Accordingly, there is a need in the art for a battery pack case and a battery pack that solve the above-described problems.
Disclosure of Invention
The present utility model is directed to solving the above-mentioned technical problems, namely, the problem of uneven distribution of pressure and heat in the case during the process of discharging high-temperature and high-pressure gas in the battery pack.
In a first aspect, the present utility model provides a battery pack case comprising:
the side wall assembly is arranged in a surrounding mode and forms an inner cavity for accommodating the battery cell module;
a divider connected at both ends to the sidewall assembly, dividing the interior cavity into a plurality of chambers;
the inside first passageway that is provided with of separator, the separator lower surface is provided with the intercommunication first inlet port of first passageway, the terminal surface of separator is provided with first exhaust hole, first exhaust hole with the second passageway intercommunication in the lateral wall subassembly.
In a specific embodiment of the above battery pack case, the case further includes:
and the inlet of the explosion-proof valve is communicated with the second channel, and the outlet of the explosion-proof valve is communicated with the outside of the box body.
In a specific embodiment of the above battery pack case, a plurality of the spacers are disposed in the inner cavity at intervals.
In a specific embodiment of the above battery pack case, the case further includes a bottom plate, and the lower surface of the separator is disposed at a distance from the bottom plate.
In a specific embodiment of the above battery pack case, the case further includes a plurality of first supporting members disposed at intervals, and the first air intake holes are disposed toward the intervals between the first supporting members.
In a specific embodiment of the above battery pack case, the case further includes a plurality of second supporting members disposed at intervals between the first supporting members;
the lower surface of the partition piece is connected with the upper surface of the second support piece, and the lower surface of the second support piece is connected with the bottom plate, so that the lower surface of the partition piece is arranged at intervals with the bottom plate.
In a specific embodiment of the above battery pack case, the separator is disposed parallel to the first support member, and the separator is disposed perpendicular to the second support member.
In the specific embodiment of the battery pack case, a third channel communicated with the second channel is arranged inside the first support member, and a second air inlet communicated with the third channel is arranged on the lower surface of the first support member;
the bottom plate is attached to the lower surface of the first supporting piece, so that the bottom plate can seal the second air inlet hole;
the gas generated by the thermal runaway of the cell module can drive the bottom plate to deform so as to enable the bottom plate and the first supporting piece to generate a first gap.
In the specific embodiment of the battery pack case, the second support member is provided with the fourth channel communicated with the third channel, and the lower surface of the second support member is provided with a third air inlet communicated with the fourth channel;
the bottom plate is attached to the lower surface of the second supporting piece, so that the bottom plate can seal the third air inlet hole;
the gas generated by the thermal runaway of the cell module can drive the bottom plate to deform so as to generate a second gap between the bottom plate and the second support.
In a second aspect, the present utility model provides a battery pack comprising:
the battery pack case;
and the battery cell module is arranged in the cavity.
Under the condition that the technical scheme is adopted, high-temperature and high-pressure gas generated by thermal runaway of the cell module can directly enter a first channel in the separator through the first air inlet hole, the gas in the first channel can enter a second channel in the side wall assembly through the first air outlet hole, and the gas in the second channel can be discharged out of the box through the first explosion-proof valve, so that the thermal runaway gas can be discharged out of the box. And after the thermal runaway gas gets into first passageway and second passageway, gaseous heat will carry out the heat exchange with separating member, lateral wall subassembly, and the separating member is located the box inner chamber, and the lateral wall subassembly is around the box, can be with gaseous heat and pressure evenly distributed on the box like this, reduces the circumstances that the box warp because of being heated and pressurized uneven to the life of extension box.
Further, when the pressure of the thermal runaway gas is high, the first passage is insufficient to allow the gas to be discharged in time. The pressure of the gas which cannot be discharged acts on the bottom plate to drive the bottom plate to deform, so that a first gap is formed. And a part of thermal runaway gas enters the third channel through the first gap and the second air inlet hole, and the gas in the third channel can enter the second channel through the through hole on the frame of the bottom plate and is discharged out of the box body through the first explosion-proof valve. This distributes the heat and pressure of the thermal runaway gas to the floor assembly and more evenly across the enclosure.
Further, when the thermal runaway gas drives the bottom plate to deform, a second gap is generated. A part of the thermal runaway gas can enter the fourth channel through the second gap and the third air inlet hole, the gas in the fourth channel can enter the third channel, and the gas in the third channel can enter the second channel and be discharged out of the box body through the explosion-proof valve. This distributes the heat and pressure of the thermal runaway gas to the floor assembly and more evenly across the enclosure.
Drawings
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of the external structure of a battery pack case provided by the present utility model;
fig. 2 is a schematic view of the internal structure of the battery pack case according to the first view, which shows the upper structure of the battery pack case;
FIG. 3 is a schematic view of the construction of a side wall member provided by the present utility model;
FIG. 4 is a schematic view of the structure of the separator provided by the present utility model;
fig. 5 is a second view of an internal structure of the battery pack case according to the present utility model, showing a lower structure of the battery pack case, and not showing a bottom plate;
fig. 6 is a schematic cross-sectional view of the first support member and the sidewall assembly according to the present utility model.
List of reference numerals:
1. a sidewall assembly; 11. a second channel; 12. a first connection hole; 13. a second connection hole; 14. a side wall member; 2. a partition; 21. a first air inlet hole; 22. a first exhaust hole; 3. an explosion-proof valve; 4. a bottom plate; 5. a first support; 51. a third channel; 52. a second air inlet hole; 6. a second support; 61. and a third air inlet hole.
Detailed Description
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
In order to solve the problem that pressure and heat are unevenly distributed in a box body in the process of discharging high-temperature and high-pressure gas in a battery pack, the embodiment discloses a battery pack which is mainly used for providing electric energy for a vehicle.
The present embodiment provides a battery pack, which is mainly used for providing electric energy for a vehicle, and can also be used for providing electric energy for other devices.
Referring to fig. 1, the battery pack includes a battery cell module (not shown) and a case.
In this embodiment, the cell module is specifically a short-blade cell; of course, the utility model does not limit the specific structure of the cell module, and the cell module can obviously also be a long-blade cell, a rectangular cell or a soft-package cell, and the like, and the changes obviously do not deviate from the basic principle of the utility model, and the utility model belongs to the protection scope of the utility model. The cell module is the primary component for providing electrical energy. The cell module is mounted in the housing. During operation of the cell module, thermal runaway may occur and high temperature and high pressure gas may be generated.
Referring to fig. 1 and 2, the case includes a sidewall assembly 1, a partition 2, an explosion-proof valve 3, a first support 5, a second support 6, and a bottom plate 4.
The side wall assembly 1 is arranged around and forms an inner cavity for accommodating the cell module. In particular, with reference to fig. 3, the side wall assembly 1 comprises a plurality of side wall members 14, preferably four side wall members 14. The four side wall members 14 are enclosed to form a rectangular frame structure, and the internal cavity of the rectangular frame structure is the inner cavity. A second channel 11 is provided in the side wall assembly 1.
Referring to fig. 2 and 4, the separator 2 is specifically a separator. The partition 2 is arranged in the inner cavity, two ends of the partition 2 are connected to the inner wall of the side wall assembly 1, the inner cavity can be divided into a plurality of chambers, and a plurality of battery cells are respectively arranged in different chambers. This prevents the thermal runaway gases from affecting the cell modules of other chambers. Of course, the present utility model does not impose any limitation on the specific shape of the separator 2, as long as the separator 2 can exert an effect of dividing the lumen.
The partition 2 is provided with a first passage (not shown in the drawings) inside, and the lower surface of the partition 2 is provided with a first air intake hole 21, the first air intake hole 21 communicating with the first passage. At least a portion of the thermal runaway gas can enter the first channel through the first inlet aperture 21. Referring to fig. 4, the end surface of the partition 2 is provided with a first vent hole 22, and the first vent hole 22 communicates with the second passage 11 in the side wall assembly 1. Specifically, referring to fig. 3, the inner wall of the sidewall assembly 1 is provided with a first connection hole 12. Referring to fig. 4, the end surface of the separator 2 abuts against the inner wall of the sidewall assembly 1 such that the first vent hole 22 communicates with the first connection hole 12, so that the first passage and the second passage 11 communicate with the first connection hole 12 through the first vent hole 22, and gas in the first passage can enter the second passage 11 through the first vent hole 22.
Referring to fig. 2, preferably, a plurality of partitions 2 may be provided at intervals in the case, and a plurality of first air intake holes 21 are provided on the partitions 2 to exhaust the thermal runaway gas at different positions in the case, and the thermal runaway gas can be exhausted through a plurality of first passages, so that the exhaust speed is increased, and the pressure and heat of the thermal runaway gas can be more uniformly distributed in the case.
The inlet of the explosion-proof valve 3 is communicated with the second channel 11, and the outlet of the explosion-proof valve is communicated with the outside of the box body. Specifically, the explosion proof valve 3 is provided on the side wall assembly 1. Further, a plurality of explosion proof valves 3 may be provided on the sidewall assembly 1. The gas in the second passage 11 can be discharged outside the tank through the explosion-proof valve 3.
Referring to fig. 2 and 5, a plurality of first supporters 5 are disposed at intervals, and first air intake holes 21 on the partition 2 are disposed toward the intervals between the first supporters 5. Further, the first support 5 is disposed in parallel with the partition 2.
The second supporting pieces 6 are disposed at intervals between the first supporting pieces 5, specifically, both ends of the second supporting pieces 6 are respectively connected with two adjacent first supporting pieces 5, further, the second supporting pieces 6 are perpendicular to the first supporting pieces 5. The lower surface of the partition 2 is connected with the upper surface of the second support 6, and the lower surface of the second support 6 is connected with the bottom plate 4, so that the lower surface of the partition 2 is arranged at a distance from the bottom plate 4. Further, the partition 2 is disposed perpendicularly to the second support 6.
The space between the first supporting members 5 and the space between the lower surface of the partition 2 and the bottom plate 4 constitute a space for communicating the cell module with the first air intake holes 21. The thermal runaway gas generated by the cell module can directly enter the first inlet holes 21 through the above-mentioned space.
In summary, the first exhaust route is: the high-temperature and high-pressure gas generated by the thermal runaway of the battery cell module can directly enter the first channel through the first air inlet hole 21, the gas in the first channel can enter the second channel 11 through the first air outlet hole 22 and the first connecting hole 12, and the gas in the second channel 11 can be discharged out of the box through the explosion-proof valve 3, so that the thermal runaway gas can be discharged out of the box.
Referring to fig. 5 and 6, the first supporter 5 is provided inside with a third passage 51, and the third passage 51 communicates with the second passage 11 so that gas in the third passage 51 can enter the second passage 11. Specifically, the lower surface of the side wall assembly 1 is provided with a second connection hole 13, and the second connection hole 13 communicates with the second passage 11. The upper surface of the first support 5 is provided with a second vent hole which communicates with the third passage 51. The upper surface of the first support 5 is connected to the lower surface of the sidewall assembly 1, and the second exhaust hole is communicated with the second connection hole 13 so that the third passage 51 is communicated with the second passage 11.
The lower surface of the first support 5 is provided with a second air intake hole 52, and the second air intake hole 52 communicates with the third passage 51. The bottom plate 4 is disposed to be adhered to the lower surface of the first support 5 so that the bottom plate 4 can close the second air intake hole 52. Preferably, the bottom plate 4 is connected to the lower surface of the first support 5 by means of adhesion. The thermal runaway gas generated by the cell module can drive the bottom plate 4 to deform, namely, the bonding position of the bottom plate 4 and the lower surface of the first supporting piece 5 is separated, so that a first gap is formed at the bonding position of the bottom plate 4 and the lower surface of the first supporting piece 5. At least a portion of the thermal runaway gas is able to enter the third channel 51 through the first gap and the second inlet holes 52 in sequence. Of course, the specific connection mode of the bottom plate 4 and the first supporting piece 5 is not limited in the present utility model, the bottom plate 4 and the first supporting piece 5 may be fixedly connected by a threaded fastener or a riveting mode, so as to ensure the connection stability of the bottom plate 4 and the first supporting piece 5, and the bottom plate 4 and the first supporting piece 5 are connected at the joint edge or around the second air inlet hole 52 by an adhesive mode, so as to ensure that the first gap can be formed, which obviously does not deviate from the basic principle of the present utility model, and the present utility model falls within the scope of protection.
A fourth passage (not shown) is provided in the second support 6, which communicates with the third passage 51 on the first support 5, so that gas in the fourth passage can enter the third passage 51. Specifically, a third connecting hole is formed in a side wall of the first supporting member 5, the fourth channel penetrates through an end portion of the second supporting member 6, and the end portion of the second supporting member 6 is connected to the first supporting member 5, so that the fourth channel is communicated with the third channel 51 through the third connecting hole.
Referring to fig. 5, the lower surface of the second supporter 6 is provided with a third air intake hole 61, and the third air intake hole 61 communicates with the fourth passage. The bottom plate 4 is disposed to be adhered to the lower surface of the second support 6 so that the bottom plate 4 can close the third air intake hole 61. Preferably, the bottom plate 4 is connected to the lower surface of the second support 6 by means of adhesion. The thermal runaway gas generated by the cell module can drive the bottom plate 4 to deform, namely, the bonding position of the bottom plate 4 and the lower surface of the second support member 6 is separated, so that a second gap is formed at the bonding position of the bottom plate 4 and the lower surface of the second support member 6. At least a portion of the thermal runaway gas is able to enter the fourth channel through the second gap and the third inlet port 61 in sequence.
In summary, the second exhaust route is: when the pressure of the thermal runaway gas is high, the first passage is insufficient to allow the gas to be discharged in time. The pressure of the gas which cannot be discharged acts on the soleplate 4 to drive the deformation of the soleplate, thereby generating a first gap and a second gap.
A part of the thermal runaway gas can enter the third passage 51 through the first gap and the second gas intake hole 52, and the gas in the third passage 51 can enter the second passage 11 and be discharged outside the case through the explosion-proof valve.
A further portion of the thermal runaway gas can enter the fourth passage through the second gap and the third inlet hole 61, the gas in the fourth passage can enter the third passage 51, the gas in the third passage 51 can enter the second passage 11, and the gas is discharged to the outside of the tank through the explosion proof valve 3.
Further, a protective layer (not shown in the figure) is disposed on the surface of the base plate 4, which is abutted against the first support 5 and the second support 6, in other words, a protective layer, specifically a layer of a gosla fire-proof material, which is also called a gosla fire-proof shield, is disposed on the inner wall of the base plate 4, and has a high temperature resistant property. The protective layer can protect the bottom plate 4 and reduce damage of high-temperature high-pressure gas to the bottom plate 4.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.
Claims (10)
1. A battery pack case, comprising:
a side wall assembly (1), wherein the side wall assembly (1) is arranged in a surrounding manner and forms an inner cavity for accommodating the battery cell module;
a partition (2), wherein two ends of the partition (2) are connected to the side wall assembly to divide the inner cavity into a plurality of chambers;
the novel air inlet device is characterized in that a first channel is formed in the partition piece (2), a first air inlet hole (21) communicated with the first channel is formed in the lower surface of the partition piece (2), a first air outlet hole (22) is formed in the end face of the partition piece (2), and the first air outlet hole (22) is communicated with a second channel (11) in the side wall assembly (1).
2. The battery pack case according to claim 1, wherein the case further comprises:
and the inlet of the explosion-proof valve (3) is communicated with the second channel (11), and the outlet of the explosion-proof valve is communicated with the outside of the box body.
3. The battery pack case according to claim 1, wherein a plurality of the separators (2) are provided at intervals in the inner cavity.
4. The battery pack case according to claim 1, further comprising a bottom plate (4), wherein the lower surface of the separator (2) is disposed at a distance from the bottom plate (4).
5. The battery pack case according to claim 4, further comprising a plurality of first supports (5) provided at intervals, the first air intake holes (21) being provided toward intervals between the first supports (5).
6. The battery pack case according to claim 5, further comprising a plurality of second supports (6), the second supports (6) being disposed at intervals between the first supports (5);
the lower surface of the partition piece (2) is connected with the upper surface of the second supporting piece (6), and the lower surface of the second supporting piece (6) is connected with the bottom plate (4), so that the lower surface of the partition piece (2) is arranged at intervals with the bottom plate (4).
7. The battery pack case according to claim 6, wherein the partition (2) is disposed in parallel with the first support (5), and the partition (2) is disposed perpendicular to the second support (6).
8. The battery pack case according to claim 6, wherein a third passage (51) communicating with the second passage (11) is provided inside the first support member (5), and a second air intake hole (52) communicating with the third passage (51) is provided on a lower surface of the first support member (5);
the bottom plate (4) is attached to the lower surface of the first supporting piece (5) so that the bottom plate (4) can seal the second air inlet hole (52);
the gas generated by the thermal runaway of the cell module can drive the bottom plate (4) to deform so as to enable the bottom plate (4) and the first supporting piece (5) to generate a first gap.
9. The battery pack case according to claim 8, wherein a fourth passage communicating with the third passage (51) is provided in the second support member (6), and a third air intake hole (61) communicating with the fourth passage is provided in a lower surface of the second support member (6);
the bottom plate (4) is attached to the lower surface of the second supporting piece (6) so that the bottom plate (4) can seal the third air inlet hole (61);
the gas generated by the thermal runaway of the cell module can drive the bottom plate (4) to deform so as to enable the bottom plate (4) and the second supporting piece (6) to generate a second gap.
10. A battery pack, comprising:
the battery pack case according to any one of claims 1 to 9;
and the battery cell module is arranged in the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321387132.5U CN220138558U (en) | 2023-05-31 | 2023-05-31 | Battery pack box and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321387132.5U CN220138558U (en) | 2023-05-31 | 2023-05-31 | Battery pack box and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220138558U true CN220138558U (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321387132.5U Active CN220138558U (en) | 2023-05-31 | 2023-05-31 | Battery pack box and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220138558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691271A (en) * | 2024-02-04 | 2024-03-12 | 蜂巢能源科技股份有限公司 | Battery and battery module |
-
2023
- 2023-05-31 CN CN202321387132.5U patent/CN220138558U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691271A (en) * | 2024-02-04 | 2024-03-12 | 蜂巢能源科技股份有限公司 | Battery and battery module |
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