CN220065987U - Battery pack and power device - Google Patents

Abstract

The utility model discloses a battery pack and a power device, wherein the battery pack comprises: the anti-explosion device comprises a shell, wherein an installation cavity is formed in the shell, and first explosion-proof valves are arranged on two opposite sides of the shell along a first direction; the blade battery cells are sequentially stacked along a second direction, the blade battery cells are provided with pole posts electrically connected with the adjacent blade battery cells, the two sides of the blade battery cells along the first direction are respectively provided with a second explosion-proof valve, the pole posts and the second explosion-proof valves are positioned on different sides of the blade battery cells, and the second explosion-proof valves are suitable for forming exhaust channels with the first explosion-proof valves when the blade battery cells are out of control, and the first direction is intersected with the second direction. According to the battery pack disclosed by the embodiment of the utility model, the thermoelectric separation can be realized by arranging the pole and the exhaust channels on different sides of the blade cell, and the exhaust channels on two opposite sides can exhaust together, so that the exhaust efficiency of the battery pack is improved.

Description

Battery pack and power device

Technical Field

The utility model relates to the field of power devices, in particular to a battery pack and a power device with the battery pack.

Background

With the rise of new energy automobiles, the design of a battery pack is strived for, and the safety design of the battery pack has become a hot problem in current research, wherein the most popular topic is the thermal runaway safety of the battery pack. In the related art, the battery pack is provided with an explosion-proof valve at one side of the battery core provided with the pole, thermoelectric separation is not realized, the exhaust speed is low, and there is room for improvement.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery pack in which a post and a vent passage are located on different sides of a blade cell, thermoelectric separation is achieved, and the vent efficiency is high.

According to an embodiment of the present utility model, a battery pack includes: the anti-explosion device comprises a shell, wherein an installation cavity is formed in the shell, and first explosion-proof valves are arranged on two opposite sides of the shell along a first direction; the blade battery cells are sequentially stacked along a second direction, the blade battery cells are provided with pole posts electrically connected with the adjacent blade battery cells, the two sides of the blade battery cells along the first direction are respectively provided with a second explosion-proof valve, the pole posts and the second explosion-proof valves are positioned on different sides of the blade battery cells, and the second explosion-proof valves are suitable for forming exhaust channels with the first explosion-proof valves when the blade battery cells are out of control, and the first direction is intersected with the second direction.

According to the battery pack disclosed by the embodiment of the utility model, the electrode post and the second explosion-proof valve are arranged on different sides of the blade cell, so that the electrode post and the exhaust channel can be positioned on different sides of the blade cell, thermoelectric separation is realized, and the exhaust channels positioned on two opposite sides can exhaust together, thereby being beneficial to improving the exhaust efficiency of the battery pack.

According to the battery pack of some embodiments of the present utility model, a first vent hole is formed in a first side of the housing along the first direction, the first explosion-proof valve is installed at the first vent hole, a first air exhaust piece is arranged between the first side of the housing along the first direction and the first side of the blade cell along the first direction, and the first air exhaust piece is provided with a first diversion channel for communicating the first vent hole with the second explosion-proof valve.

According to the battery pack of some embodiments of the present utility model, the plurality of first exhaust holes are distributed corresponding to the second explosion-proof valves of the plurality of blade cells, the plurality of first exhaust pieces are used for communicating the plurality of first exhaust holes with the corresponding second explosion-proof valves, respectively.

According to some embodiments of the utility model, the size of the second explosion-proof valve and the size of the first vent are smaller than the cross-sectional size of the first flow channel.

According to the battery pack of some embodiments of the present utility model, a liquid cooling plate is disposed between the second side of the housing along the first direction and the second side of the blade cell along the first direction, a flow passage is defined by the side of the liquid cooling plate facing away from the blade cell and the housing, the liquid cooling plate is formed with a communication hole for communicating the second explosion-proof valve and the flow passage, a second exhaust hole for communicating with the flow passage is disposed on the second side of the housing along the first direction, and the first explosion-proof valve is installed in the second exhaust hole.

According to the battery pack of some embodiments of the present utility model, the second vent hole is configured to be disposed to intersect the first direction in an axial direction.

According to some embodiments of the utility model, the housing is provided with a plurality of the second air vents on at least one side in the second direction, and the plurality of the second air vents on the same side are arranged at intervals.

According to some embodiments of the utility model, a second exhaust piece is sandwiched between the liquid cooling plate and the blade core, and the second exhaust piece is provided with a second diversion channel for communicating the second exhaust hole with the second explosion-proof valve.

According to some embodiments of the utility model, the first explosion-proof valve includes an explosion-proof membrane and a mica sheet mounted inside the explosion-proof membrane, and the mica sheet is used to puncture the explosion-proof membrane when the blade cell is thermally out of control.

The utility model also provides a power device.

A power plant according to an embodiment of the present utility model includes: the battery pack according to any one of the above embodiments.

According to the power device provided by the embodiment of the utility model, the electrode post and the second explosion-proof valve are arranged on different sides of the blade battery core, so that the electrode post and the exhaust channel can be positioned on different sides of the blade battery core, thermoelectric separation is realized, the exhaust channels positioned on two opposite sides can exhaust together, the exhaust efficiency of a battery pack is improved, and the overall performance of the power device is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the mating of a plurality of blade cells according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view of a battery pack according to an embodiment of the present utility model;

fig. 4 is a partial enlarged view at a in fig. 3.

Reference numerals:

the battery pack 100 is provided with a battery pack,

the housing 1, the upper housing 11, the first exhaust hole 111,

the lower housing 12, the second exhaust hole 121, the installation cavity 122, the first explosion-proof valve 13,

a blade cell 2, a pole 21, a second explosion-proof valve 22, a first exhaust part 3, a first diversion channel 31,

the liquid cooling plate 4, the communicating hole 41, the conductive foam 5, the buffer 6 and the flow passage 7.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Next, with reference to the drawings, a battery pack 100 according to an embodiment of the present utility model is described.

As shown in fig. 1 to 4, a battery pack 100 according to an embodiment of the present utility model includes: the device comprises a shell 1 and a plurality of blade battery cores 2, wherein an installation cavity 122 is formed in the shell 1, and first explosion-proof valves 13 are arranged on two opposite sides of the shell 1 along a first direction; the blade cells 2 are sequentially stacked along the second direction, the blade cells 2 are provided with pole posts 21 electrically connected with the adjacent blade cells 2, the two sides of the blade cells 2 along the first direction are provided with second explosion-proof valves 22, the pole posts 21 and the second explosion-proof valves 22 are positioned on different sides of the blade cells 2, the second explosion-proof valves 22 are suitable for forming exhaust channels with the first explosion-proof valves 13 when the blade cells 2 are out of control, and the first direction and the second direction are intersected.

Therefore, the pole column 21 and the exhaust channels can be positioned on different sides, thermoelectric separation is realized, and the exhaust channels positioned on the two opposite sides can exhaust together, so that the exhaust efficiency of the blade battery cell 2 is improved.

For example, referring to fig. 1 to 4, the battery pack 100 includes a case 1 and a blade cell 2, the case 1 is configured in a rectangular shape, the case 1 includes an upper case 111 and a lower case 121, the lower case 121 is formed with an open mounting cavity 122, and the upper case 111 is covered on the lower case 121 and serves to close the mounting cavity 122. The housing 1 is provided with first explosion-proof valves 13 on opposite sides in the first direction. For example, in the embodiment shown in fig. 1, the first direction is the up-down direction, and the upper case 111 and the lower case 121 are provided with the first explosion-proof valve 13, respectively.

The plurality of blade cells 2 are provided, and the plurality of blade cells 2 may be stacked in order along a second direction, which intersects the first direction. For example, when the first direction is set to the up-down direction shown in fig. 1, the second direction may be the front-back direction or the left-right direction shown in fig. 1. The buffer pieces 6 are respectively arranged between any two adjacent blade cells 2 in a clamping manner, the number of the buffer pieces 6 is two, the two buffer pieces 6 are respectively positioned at two ends of the blade cells 2 along the length direction (i.e. the left-right direction of fig. 1), and the buffer pieces 6 are used for spacing the side surfaces of the two adjacent blade cells 2 facing each other (i.e. the side surfaces along the second direction), so that a buffer space can be formed between the two adjacent blade cells 2.

Wherein, can be equipped with the second explosion-proof valve 22 respectively in the both sides of blade electric core 2 along the first direction, the first explosion-proof valve 13 intercommunication of second explosion-proof valve 22 and corresponding side, when blade electric core 2 thermal runaway, first explosion-proof valve 13 and second explosion-proof valve 22 open under the atmospheric pressure effect in blade electric core 2 in order to form the exhaust passage, the outside intercommunication of exhaust passage and casing 1 for the high temperature gas in the blade electric core 2 can directly flow to the outside of casing 1 through the exhaust passage, in order to slow down or eliminate the explosion risk of blade electric core 2, high temperature gas.

The blade cell 2 is provided with a pole 21 electrically connected to an adjacent blade cell 2, the pole 21 and the second explosion-proof valve 22 being located on different sides of the blade cell 2. For example, protruding poles 21 may be provided on both sides of the blade cell 2 in the second direction, respectively, and two poles 21 of the same blade cell 2 may be arranged at intervals in the length direction of the blade cell 2. The pole posts 21 of the two adjacent blade electric cores 2 are arranged opposite to each other at intervals, and conductive foam 5 is clamped between the pole posts 21 of the two adjacent blade electric cores 2, so that the pole posts 21 of the two adjacent blade electric cores 2 can be electrically connected through the conductive foam 5 to connect the blade electric cores 2 together in series.

It can be understood that the electrode post 21 and the second explosion-proof valve 22 are respectively arranged on different sides of the blade electric core 2, so that the exhaust channel and the electrode post 21 are respectively positioned on different sides of the blade electric core 2, in the exhaust process, the electrode post 21 is not in direct contact with high-temperature air flow, so that thermoelectric separation is realized, and the exhaust channels positioned on two opposite sides can exhaust together, thereby being beneficial to improving the exhaust efficiency of the blade electric core 2.

Specifically, in the embodiment shown in fig. 1, the blade electric cores 2 are two groups (of course, a group may be also omitted herein), the two groups of blade electric cores 2 are arranged at intervals along the left-right direction, the plurality of blade electric cores 2 of each group are stacked in sequence along the front-back direction, and the two sides of the blade electric cores 2 along the front-back direction are respectively provided with a pole 21. The two sides of the blade cell 2 along the up-down direction are respectively provided with a second explosion-proof valve 22, and the upper shell 111 and the lower shell 121 can be respectively provided with a first explosion-proof valve 13, the first explosion-proof valve 13 of the upper shell 111 is communicated with the second explosion-proof valve 22 on the upper side of the blade cell 2, and the first explosion-proof valve 13 of the lower shell 121 is communicated with the second explosion-proof valve 22 on the lower side of the blade cell 2.

Alternatively, the blade cell 2 may be provided in plurality, the plurality of blade cells 2 are stacked in order along the front-rear direction, the two sides of the blade cell 2 along the front-rear direction are respectively provided with the pole posts 21, the two sides of the blade cell 2 along the left-right direction are respectively provided with the second explosion-proof valves 22, and the two sides of the lower housing 121 along the left-right direction are respectively provided with the first explosion-proof valves 13, the first explosion-proof valves 13 located on the left side are communicated with the second explosion-proof valves 22 located on the left side, and the first explosion-proof valves 13 located on the right side are communicated with the second explosion-proof valves 22 located on the right side.

Alternatively, a plurality of blade cells 2 may be provided, and a plurality of blade cells 2 may be stacked in order in the front-rear direction, and pole pieces 21 may be provided on both sides of the blade cells 2 in the left-right direction. The two sides of the blade cell 2 along the up-down direction are respectively provided with a second explosion-proof valve 22, and the upper shell 111 and the lower shell 121 can be respectively provided with a first explosion-proof valve 13, the first explosion-proof valve 13 of the upper shell 111 is communicated with the second explosion-proof valve 22 on the upper side of the blade cell 2, and the first explosion-proof valve 13 of the lower shell 121 is communicated with the second explosion-proof valve 22 on the lower side of the blade cell 2.

Alternatively, the plurality of blade cells 2 may be provided, the plurality of blade cells 2 may be stacked in order in the front-rear direction, the poles 21 may be provided on both sides of the blade cells 2 in the up-down direction, the second explosion-proof valves 22 may be provided on both sides of the blade cells 2 in the left-right direction, the first explosion-proof valves 13 may be provided on both sides of the lower case 121 in the left-right direction, the first explosion-proof valves 13 on the left may be in communication with the second explosion-proof valves 22 on the left, and the first explosion-proof valves 13 on the right may be in communication with the second explosion-proof valves 22 on the right.

According to the battery pack 100 of the embodiment of the utility model, the terminal post 21 and the second explosion-proof valve 22 are arranged on different sides of the blade cell 2, so that the terminal post 21 and the exhaust channels can be positioned on different sides of the blade cell 2, thermoelectric separation is realized, and the exhaust channels positioned on two opposite sides can exhaust together, thereby being beneficial to improving the exhaust efficiency of the battery pack 100.

In some embodiments of the present utility model, a first vent hole 111 is formed at a first side of the housing 1 along the first direction, the first explosion-proof valve 13 is installed at the first vent hole 111, a first vent member 3 is disposed between the first side of the housing 1 along the first direction and the first side of the blade cell 2 along the first direction, and the first vent member 3 is provided with a first diversion channel 31 for communicating the first vent hole 111 with the second explosion-proof valve 22.

For example, referring to fig. 1 to 4, a first vent hole 111 may be provided at a first side of the housing 1 in a first direction, and a first explosion-proof valve 13 may be installed in the first vent hole 111. Meanwhile, a first air discharging member 3 may be provided between the first side of the housing 1 in the first direction and the first side of the blade cell 2 in the first direction, one end of the first air discharging member 3 being supported at the inner circumferential wall of the housing 1 and the other end being supported on the side wall of the blade cell 2. It should be noted that, the material of the first air discharging member 3 may be made of foam with basalt adhered to the surface, and the first air discharging member 3 is configured to be compressible, so that the first air discharging member 3 may limit and support the housing 1 and the blade electric core 2, so as to improve the overall stability of the battery pack 100.

The first exhaust member 3 is formed with a first flow guide passage 31, and the first flow guide passage 31 is used to communicate the first exhaust hole 111 with the second explosion-proof valve 22. In this way, when the blade cell 2 is thermally out of control, the high temperature air flow in the blade cell 2 may directly flow to the first exhaust hole 111 along the first guide passage 31 to flow out of the first explosion-proof valve 13 to the outside of the case 1. Thus, the residence time of the high-temperature gas in the installation cavity 122 can be reduced, which is advantageous for improving the reliability of the battery pack 100.

For example, as shown in fig. 4, a first exhaust hole 111 may be provided on the upper case 111, a first explosion-proof valve 13 is installed in the first exhaust hole 111, and a first exhaust member 3 is provided between the upper case 111 and the upper side of the blade cell 2, one end of the first exhaust member 3 is supported at the inner circumferential wall of the upper case 111 and the other end is supported at the upper side wall of the blade cell 2, the first exhaust member 3 is formed with a first guide passage 31, and the first guide passage 31 is used to communicate the first exhaust hole 111 with the second explosion-proof valve 22.

In some embodiments of the present utility model, the number of the first exhaust holes 111 is plural, the number of the first exhaust holes 111 is distributed corresponding to the second explosion-proof valves 22 of the plurality of blade cells 2, and the number of the first exhaust pieces 3 is plural, and the number of the first exhaust pieces 3 is used to communicate the plurality of the first exhaust holes 111 with the corresponding second explosion-proof valves 22, respectively.

For example, referring to fig. 4, the plurality of first vent holes 111 may be provided in plurality, the plurality of first vent holes 111 may be arranged at intervals along the second direction, the plurality of first vent holes 111 may be distributed corresponding to the second explosion-proof valves 22 on the first side of the plurality of blade cells 2 along the first direction, for example, the plurality of first vent holes 111 may be aligned with the second explosion-proof valves 22 on the first side of the plurality of blade cells 2 along the first direction. A first explosion-proof valve 13 is installed in each of the first exhaust holes 111. Meanwhile, the first exhaust member 3 may be provided in plurality, the plurality of first exhaust members 3 and the plurality of blade cells 2 are in one-to-one correspondence, the first exhaust member 3 is configured in a cylindrical shape, one end of the first exhaust member 3 is supported on the inner peripheral wall of the housing 1 and the other end is supported on the corresponding blade cell 2, a first flow guide passage 31 is formed in each first exhaust member 3, and the first flow guide passage 31 is used for communicating the first exhaust hole 111 with the second explosion-proof valve 22 on the first side of the corresponding blade cell 2 in the first direction. Through the arrangement, each blade cell 2 can be provided with the independent first exhaust piece 3, which is beneficial to delaying the diffusion speed of thermal runaway and improving the safety of the battery pack 100.

As an example, as shown in fig. 4, a plurality of first exhaust holes 111 may be provided on the upper case 111, the plurality of first exhaust holes 111 being arranged at intervals in the front-rear direction, the plurality of first exhaust holes 111 being distributed corresponding to the second explosion-proof valves 22 of the upper sides of the plurality of blade cells 2, the plurality of first exhaust pieces 3 being provided in plurality, the plurality of first exhaust pieces 3 being in one-to-one correspondence with the plurality of blade cells 2, the upper ends of the first exhaust pieces 3 being supported on the inner peripheral wall of the upper case 111 and the other ends being supported on the upper side walls of the corresponding blade cells 2, each of the first exhaust pieces 3 being formed with a first flow guide passage 31 for communicating the first exhaust holes 111 with the second explosion-proof valves 22 of the upper side walls of the corresponding blade cells 2.

In some embodiments of the present utility model, as shown in fig. 4, the size of the second explosion-proof valve 22 and the size of the first exhaust hole 111 may be smaller than the cross-sectional size of the first flow guide channel 31 such that the first exhaust hole 111, the second explosion-proof valve 22 at the first side of the blade cell 2 in the first direction communicate with only the first flow guide channel 31. Thus, when the blade cell 2 is thermally out of control, the high temperature air flow in the blade cell 2 can completely flow into the first guide passage 31 through the second explosion-proof valve 22, and the high temperature air flow can flow along the first guide passage 31 to the first exhaust hole 111 and completely flow out to the outside of the case 1 through the first explosion-proof valve 13. By the above arrangement, the exhaust effect of the exhaust passage can be improved, which is advantageous in delaying the diffusion of thermal runaway, and improving the safety of the battery pack 100.

In some embodiments of the present utility model, a liquid cooling plate 4 is disposed between the second side of the housing 1 along the first direction and the second side of the blade electric core 2 along the first direction, a side of the liquid cooling plate 4 away from the blade electric core 2 and the housing 1 define a through-flow channel 7, the liquid cooling plate 4 is formed with a communication hole 41 for communicating the second explosion-proof valve 22 and the through-flow channel 7, a second exhaust hole 121 communicating with the through-flow channel 7 is disposed at the second side of the housing 1 along the first direction, and the first explosion-proof valve 13 is installed in the second exhaust hole 121.

For example, as shown in fig. 4, a liquid cooling plate 4 may be disposed between the second side of the housing 1 along the first direction and the second side of the blade cell 2 along the first direction, and the liquid cooling plate 4 is attached to the second side of the blade cell 2 along the first direction and is used for cooling the blade cell 2. The side of the liquid cooling plate 4 facing away from the blade battery core 2 is spaced from the second side of the shell 1 along the first direction and defines the flow passage 7, through communication holes 41 are formed in the liquid cooling plate 4, the plurality of communication holes 41 are formed, the plurality of communication holes 41 are arranged opposite to the second explosion-proof valves 22 on the second side of the blade battery core 2 along the first direction one by one, and the communication holes 41 are used for communicating the second explosion-proof valves 22 with the flow passage 7.

Meanwhile, a second vent hole 121 may be provided at a second side of the case 1 in the first direction, the first explosion-proof valve 13 is installed in the second vent hole 121, and the second vent hole 121 communicates with the through-flow passage 7, so that the second vent hole 121 may communicate with the second explosion-proof valve 22 through the through-flow passage 7, the communication hole 41. Thus, when the blade cell 2 is thermally out of control, the high temperature air flow in the blade cell 2 can flow through the second explosion-proof valve 22, the communication hole 41, the through-flow passage 7 and the first explosion-proof valve 13 in order to flow out to the outside of the housing 1,

it should be emphasized that, as shown in fig. 1, the first explosion-proof valve 13 provided in the first exhaust hole 111 and the first explosion-proof valve 13 provided in the second exhaust hole 121 may be configured to have different structures or may be configured to have the same structure, which is not limited in the present utility model.

As shown in fig. 4, for example, a liquid cooling plate 4 may be installed in the lower housing 121, the liquid cooling plate 4 is used for being attached to the bottom of the blade electric core 2, a space is formed between the lower side wall of the liquid cooling plate 4 and the bottom wall of the installation cavity 122, the through-flow channel 7 is defined, a plurality of through holes 41 penetrating vertically are formed in the liquid cooling plate 4, the plurality of through holes 41 are arranged opposite to the second explosion-proof valves 22 on the second side of the blade electric core 2 along the first direction one by one, the through holes 41 are used for communicating the second explosion-proof valves 22 with the through-flow channel 7, a second exhaust hole 121 communicating with the through-flow channel 7 is formed on the lower side of the lower housing 121, and the first explosion-proof valve 13 is installed in the second exhaust hole 121.

Through the above arrangement, when the blade cell 2 is thermally out of control, the high-temperature air flow discharged from the second exhaust hole 121 can be prevented from directly contacting with the rest of the blade cells 2, which is beneficial to slowing down the diffusion of the thermal out of control and improving the safety of the battery pack 100.

In some embodiments of the present utility model, the second exhaust hole 121 may be configured to be disposed with an axial direction intersecting the first direction. For example, as shown in fig. 1 to 2, the first direction may be set to be the up-down direction. Wherein, a second exhaust hole 121 may be opened on the circumferential wall of the housing 1, and an axial direction of the second exhaust hole 121 is configured to extend in a horizontal direction; alternatively, the second exhaust hole 121 may be opened at the bottom wall of the housing 1, and the axial direction of the second exhaust hole 121 is configured to extend outward and downward in the horizontal direction, which is not limited by the present utility model. In this way, the exhaust port of the second exhaust hole 121 may be opened at the sidewall of the housing 1. Thereby, the probability of clogging of the second exhaust hole 121 is reduced, and the contact time of the high temperature air flow with the battery pack 100 is advantageously reduced, and the layout rationality of the battery pack 100 is improved.

In some embodiments of the present utility model, the housing 1 is provided with a plurality of second exhaust holes 121 at least one side in the second direction, and the plurality of second exhaust holes 121 located at the same side are arranged at intervals.

For example, as shown with reference to fig. 1 and 3, a plurality of second exhaust holes 121 may be provided at one side of the housing 1 in the front-rear direction, the plurality of second exhaust holes 121 being arranged at intervals in the left-right direction; alternatively, a plurality of second exhaust holes 121 may be provided at both sides of the housing 1 in the front-rear direction, respectively, and the plurality of second exhaust holes 121 located at the same side may be arranged at intervals in the left-right direction, which is not limited in the present utility model. Each of the second exhaust holes 121 is for communication with the through-flow passage 7. Thus, the exhaust efficiency can be improved, the symmetry of the battery pack 100 can be ensured, and the overall performance of the battery pack 100 can be improved.

Of course, the case 1 may be provided with a plurality of second exhaust holes 121 on at least one side in the left-right direction, and the plurality of second exhaust holes 121 on the same side may be arranged at intervals in the front-rear direction, which is not limited in the present utility model.

In some embodiments of the present utility model, a second air exhaust member is interposed between the liquid cooling plate 4 and the blade cell 2, and the second air exhaust member is provided with a second flow guide channel for communicating the second air exhaust hole 121 with the second explosion-proof valve 22.

For example, a second exhaust member may be interposed between the liquid cooling plate 4 and the blade cell 2, the material of the second exhaust member being a heat insulating and high temperature resistant material, the second exhaust member being formed with a second flow guide passage for communicating the second exhaust hole 121 with the second explosion-proof valve 22 on the second side of the blade cell 2 in the first direction. In this way, when the blade cell 2 is thermally out of control, the high temperature air flow in the blade cell 2 may directly flow to the second exhaust hole 121 along the second flow guide passage to flow out to the outside of the case 1 through the first explosion-proof valve 13. Thus, the residence time of the high-temperature gas in the installation cavity 122 can be reduced, which is advantageous for improving the reliability of the battery pack 100.

In some embodiments of the present utility model, the first explosion-proof valve 13 includes an explosion-proof membrane and a mica sheet mounted on the inner side of the explosion-proof membrane, and the mica sheet is used to puncture the explosion-proof membrane when the blade cell 2 is thermally out of control.

For example, referring to fig. 1, the first explosion-proof valve 13 includes an explosion-proof membrane and a mica sheet that is fitted on an inner peripheral wall of the installation cavity 122 and is located inside the explosion-proof membrane, and is provided with a plurality of scores, for example, the plurality of scores may be configured in an X-shape or the like. Thus, when thermal runaway of the blade cell 2 occurs, the high temperature air flow may strike the mica sheet, so that the mica sheet is broken and sharp fragments are formed, which may outwardly pierce the explosion-proof membrane to open the exhaust passage. Through the arrangement, the first explosion-proof valve 13 can be opened in time when the blade cell 2 is out of control, and the first explosion-proof valve 13 can be kept stable when being impacted outside, so that the reliability of the first explosion-proof valve 13 is improved.

The utility model also provides a power device.

A power plant according to an embodiment of the present utility model includes: the battery pack 100 according to any of the above embodiments. It should be noted that the power device may be a new energy vehicle, or a fuel oil vehicle, or may be another type of power device, which is not limited in this aspect of the present utility model.

According to the power device provided by the embodiment of the utility model, the pole 21 and the second explosion-proof valve 22 are arranged on different sides of the blade cell 2, so that the pole 21 and the exhaust channels can be positioned on different sides of the blade cell 2, thermoelectric separation is realized, and the exhaust channels positioned on two opposite sides can exhaust together, thereby being beneficial to improving the exhaust efficiency of the battery pack 100 and improving the overall performance of the power device.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

In the description of the present utility model, "plurality" means two or more.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery pack, comprising:

the anti-explosion device comprises a shell, wherein an installation cavity is formed in the shell, and first explosion-proof valves are arranged on two opposite sides of the shell along a first direction;

the blade battery cells are sequentially stacked along a second direction, the blade battery cells are provided with pole posts electrically connected with the adjacent blade battery cells, the two sides of the blade battery cells along the first direction are respectively provided with a second explosion-proof valve, the pole posts and the second explosion-proof valves are positioned on different sides of the blade battery cells, and the second explosion-proof valves are suitable for forming exhaust channels with the first explosion-proof valves when the blade battery cells are out of control, and the first direction is intersected with the second direction.

2. The battery pack of claim 1, wherein the housing is provided with a first vent hole on a first side of the housing in the first direction, the first explosion-proof valve is mounted at the first vent hole, a first vent member is provided between the first side of the housing in the first direction and the first side of the blade cell in the first direction, and the first vent member is provided with a first flow guide channel for communicating the first vent hole with the second explosion-proof valve.

3. The battery pack according to claim 2, wherein the plurality of first vent holes are distributed corresponding to the second explosion-proof valves of the plurality of blade cells, and the plurality of first vent members are used for communicating the plurality of first vent holes with the corresponding second explosion-proof valves, respectively.

4. The battery pack of claim 3, wherein the size of the second explosion-proof valve and the size of the first vent are both smaller than the cross-sectional size of the first flow channel.

5. The battery pack according to claim 2, wherein a liquid cooling plate is provided between the second side of the housing in the first direction and the second side of the blade cell in the first direction, a side of the liquid cooling plate facing away from the blade cell and the housing define an overflow passage, the liquid cooling plate is formed with a communication hole communicating the second explosion-proof valve and the overflow passage, and a second exhaust hole communicating with the overflow passage is provided at the second side of the housing in the first direction, and the first explosion-proof valve is installed in the second exhaust hole.

6. The battery pack of claim 5, wherein the second vent is configured to be disposed axially intersecting the first direction.

7. The battery pack of claim 5, wherein the case is provided with a plurality of the second vent holes on at least one side in the second direction, and a plurality of the second vent holes on the same side are arranged at intervals.

8. The battery pack of claim 5, wherein a second vent member is sandwiched between the liquid cooling plate and the blade cell, the second vent member having a second flow directing channel for communicating the second vent hole with the second explosion proof valve.

9. The battery pack of any one of claims 1-8, wherein the first explosion-proof valve comprises an explosion-proof membrane and a mica sheet mounted inside the explosion-proof membrane, and the mica sheet is used to puncture the explosion-proof membrane upon thermal runaway of the blade cell.

10. A power plant, comprising: the battery pack according to any one of claims 1 to 9.