Battery mounting mechanism and battery pack with same

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery mounting mechanism and a battery pack with the same. The battery mounting mechanism comprises a frame body, a flow guide channel and at least two flow guide plates, wherein at least one accommodating groove for arranging and mounting a battery cell group in the first direction is formed in the frame body; the flow guide channel is arranged in the frame body and is connected with a battery cell explosion-proof valve; the flow guide plates are arranged on the inner walls of the two sides of the accommodating groove in the second direction respectively; the flow guide units are sequentially arranged in the flow guide plate in the first direction and are in one-to-one correspondence with the air inlets and the battery cell anti-explosion valves, the outer anti-explosion valves are installed on the outer wall of the frame body and are communicated with the flow guide channels, each battery cell is provided with the battery cell anti-explosion valve in one of the two side walls in the second direction, and the battery cells are discharged out of the box body in a centralized mode through the outer anti-explosion valves. And the diversion units at the other battery cells without thermal runaway are normally closed, so that high-temperature eruptions are effectively prevented from diffusing to the surrounding battery cells, the influence of high-temperature gas on other battery cells is reduced, and the risk of thermal runaway in a larger range is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, in particular to a battery mounting mechanism, and further to a battery pack including the battery mounting mechanism. Background Art

[0002] With the dramatic increase in lithium battery usage, safety incidents are becoming a frequent occurrence. Safety concerns surrounding lithium-ion batteries have hindered their widespread adoption, with thermal runaway, in particular, being the most significant issue. Consequently, appropriate safety measures are urgently needed to improve battery safety. Currently, research on thermal runaway focuses on two main perspectives: exploring the triggering mechanism and improving battery performance through materials analysis; and analyzing the thermal diffusion effect within battery modules. The latter approach currently focuses on thermal isolation between modules, employing insulating materials between battery cells to prevent thermal runaway transmission between adjacent cells.

[0003] However, in the existing technology, little consideration is given to the flow control of high-temperature flue gas caused by thermal runaway. When a lithium battery experiences thermal runaway, the molten metal (mainly aluminum and copper debris) it produces can easily cause direct short circuits and arcing at the connection of the module copper busbars. The generation of high-energy arcs will ignite the combustible gas (mainly electrolyte vapor) inside the battery pack, causing a larger scale and more serious thermal runaway problem. Therefore, more stringent measures are needed to deal with battery thermal runaway. Utility Model Content

[0004] The purpose of the present utility model is to provide a battery mounting mechanism and a battery pack having the same, which can effectively control and discharge the high-temperature gas generated when a single battery cell is in thermal runaway, reduce the impact on other battery cells, and reduce the risk of thermal runaway in a wider range.

[0005] To achieve one of the aforementioned objectives, according to one aspect of the present application, a battery mounting mechanism is provided, comprising a frame having at least one receiving slot formed therein for arranging and mounting a battery cell group along a first direction, wherein one of the two side walls of each battery cell along a second direction is provided with a battery cell explosion-proof valve;

[0006] a diversion channel, disposed inside the frame and configured to be connected to the battery cell explosion-proof valve;

[0007] At least two guide plates are provided and are respectively mounted on the inner walls of both sides of the receiving groove along the second direction, and a plurality of air inlets communicating with the guide channel are opened on a side of the receiving groove close to the guide plates;

[0008] A flow guide unit is sequentially arranged inside the guide plate along the first direction and is provided in a one-to-one correspondence with the air inlet and the battery cell explosion-proof valve; two ends of the flow guide unit are respectively connected to the air inlet and the battery cell explosion-proof valve, and are configured to control the flow of gas between the two when the battery cell gas pressure is greater than a preset value, and to control the flow of gas between the two when the battery cell gas pressure is less than the preset value;

[0009] The external explosion-proof valve is installed on the outer wall of the frame and communicates with the guide channel. The valve is configured to open when the gas in the guide channel reaches a preset pressure to discharge the gas out of the frame.

[0010] In addition to one or more of the above, or as an alternative, in another embodiment, the diversion channels are configured as at least two and are not connected to each other, the multiple battery cell explosion-proof valves located on the same side of each column of battery cell groups are configured to be connected to one of the at least two diversion channels, and the multiple battery cell explosion-proof valves located on the other side are configured to be connected to the other of the at least two diversion channels.

[0011] In addition to one or more of the above, or as an alternative, in another embodiment, the at least two guide channels are sequentially stacked inside the frame along the third direction, and the external explosion-proof valve is connected to each of the guide channels.

[0012] In addition to one or more of the above, or as an alternative, in another embodiment, the flow guiding unit includes:

[0013] A flow channel is opened through the thickness direction of the guide plate, and its two ends are respectively connected to the battery cell explosion-proof valve and the air inlet, and the flow channels of each guide unit are not connected to each other;

[0014] The diverter valve is arranged at one end of the flow channel close to the air inlet, and is configured to connect the flow channel and the air inlet when the gas pressure in the flow channel is greater than a preset value, and to block the flow channel and the air inlet when the gas pressure in the flow channel is less than the preset value.

[0015] In addition to one or more of the above, or as an alternative, in another embodiment, the diverter valve includes:

[0016] A blocking member abuts against a port of the flow channel close to one end of the air inlet;

[0017] an elastic member, the two ends of which are respectively connected to the blocking member and the inner wall of the guide channel opposite to the air inlet;

[0018] The blocking member is configured to move closer to or farther away from the inner wall of the flow channel port under the combined force of the gas and the elastic member, so as to close or open the port of the flow channel close to one end of the air inlet.

[0019] In addition to one or more of the above, or as an alternative, in another embodiment, both end ports of the flow channel are configured as tapered ports with a cross-section gradually increasing from the inside to the outside, and the sealing member is configured as a tapered pin that can sealably fit against the inner wall of the tapered port.

[0020] In addition to one or more of the above, or as an alternative, in another embodiment, the frame includes:

[0021] frame;

[0022] A first crossbeam, having two ends respectively connected to two inner walls of the frame along the first direction, and configured as one;

[0023] A second crossbeam, with both ends connected to the inner walls of the frame along the first direction, parallel to the first crossbeam and provided with at least one along the second direction, a receiving groove being formed between the first crossbeam, the frame, and the second crossbeam, and another receiving groove being formed between the second crossbeam and the frame;

[0024] The air inlets are opened on: the outer walls on both sides of each second beam along the second direction, the inner wall on the side of the frame opposite to the second beam, and the outer wall on the side opposite to the first beam and the second beam. The guide plates are correspondingly attached to the sides of each column of the air inlets to make the internal guide units face the air inlets one by one.

[0025] In addition to one or more of the above, or as an alternative, in another embodiment, the two rows of air inlets on the outer walls on both sides of the second beam along the second direction, the two rows of air inlets on the inner wall of the frame and the outer wall of the second beam opposite to it, and the two rows of air inlets on the outer wall of the first beam and the outer wall of the second beam opposite to it are staggered.

[0026] In addition to one or more of the above, or as an alternative, in another embodiment, further comprising:

[0027] The circulation channels are configured in three and are stacked and arranged in sequence along the third direction inside the frame;

[0028] One of the three circulation channels and the inner cavity of the first beam communicating therewith together form a guide channel, another one of the three circulation channels and the inner cavity of the second beam communicating therewith together form another guide channel, and the remaining one of the three circulation channels connected to the air inlet on the frame forms another guide channel.

[0029] In addition to one or more of the above, or as an alternative, in another embodiment, further comprising:

[0030] The partition plate is arranged inside each of the circulation channels and is configured to block the communication between the three guide channels.

[0031] In addition to one or more of the above, or as an alternative, in another embodiment, the external explosion-proof valve is installed on the outer wall of the frame and is connected to the three circulation channels at the same time.

[0032] In addition to one or more of the above, or as an alternative, in another embodiment, one of the guide plate and the frame is provided with a threaded hole, and the other is provided with a light hole, and is configured to connect the guide plate to the frame by passing a bolt through the light hole and screwing it into the threaded hole.

[0033] In addition to one or more of the above, or as an alternative, in another embodiment, further comprising:

[0034] A box cover, which is arranged on the top of the frame;

[0035] The sealing ring is arranged at the connection between the box cover and the frame body and is configured to seal the gap between the two.

[0036] In order to achieve the second of the aforementioned purposes, according to another aspect of the present application, a battery pack is provided, which includes the battery mounting mechanism described in the aforementioned aspect, including a battery module, and the battery mounting mechanism described above, and the battery module is filled in the at least one accommodating slot.

[0037] In addition to one or more of the above, or as an alternative, in another embodiment, the battery module includes a plurality of battery cells arranged in sequence along a first direction, and each of the battery cells is provided with a battery pole, and the plurality of battery poles are connected in series through a bus.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows: through the diversion channel provided inside the frame, the high-temperature flue gas generated during thermal runaway can be discharged from the frame according to a preset path, which can effectively prevent the high-voltage short circuit and arcing caused by the metal melt adhering to the connection of the module copper busbar, thereby reducing the risk of electric sparks igniting the combustible gas in the battery; by one-to-one correspondence between the diversion unit, the air inlet and the battery cell explosion-proof valve, the high-temperature flue gas generated during thermal runaway of a single battery cell can be discharged separately into the diversion channel through the diversion unit, and then discharged from the frame through the external explosion-proof valve. The diversion units at the remaining battery cells where thermal runaway has not occurred are normally closed, thereby effectively preventing the high-temperature eruption from spreading to the surrounding battery cells, reducing the impact of high-temperature gas on other battery cells, and the setting of the external explosion-proof valve prevents external air from entering the diversion channel, further reducing the risk of thermal runaway in a larger range. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The disclosure of this application will be more easily understood with reference to the accompanying drawings, which are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0040] In the picture:

[0041] Figure 1 This is a three-dimensional schematic diagram of a battery installation mechanism according to the present application when installing a battery cell pack;

[0042] Figure 2 A three-dimensional structural diagram of a frame of a battery installation mechanism provided in this application;

[0043] Figure 3 A three-dimensional structural diagram of a frame of a battery installation mechanism provided by the present application from another perspective;

[0044] Figure 4 This is a top view of a battery installation mechanism according to the present application when installing a battery cell pack;

[0045] Figure 5 for Figure 4 Partial cross-sectional view at point A in the middle;

[0046] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0047] Figure 7 A three-dimensional structural diagram of a guide plate of a battery mounting mechanism provided in this application;

[0048] Figure 8 A cross-sectional view of a battery installation mechanism provided by the present application when installing a battery cell pack along a second direction;

[0049] Figure 9 A cross-sectional view of a battery installation mechanism provided in the present application when installing a battery cell pack along a first direction;

[0050] Figure 10 A schematic diagram of gas flow when thermal runaway occurs in a battery cell pack beside the second crossbeam of a battery mounting mechanism provided by the present application;

[0051] Figure 11 A schematic diagram of gas flow when thermal runaway occurs in a battery cell group beside a first crossbeam of a battery mounting mechanism provided in the present application;

[0052] Figure 12 A schematic diagram of gas flow when thermal runaway occurs in a battery cell pack beside the inner wall of the frame at the end along the second direction of a battery installation mechanism provided by the present application;

[0053] Figure 13This is a three-dimensional schematic diagram of a battery installation mechanism according to the present application when installing a box cover.

[0054] In the accompanying drawings: 1 frame, 11 frame, 12 first crossbeam, 13 second crossbeam, 14 receiving groove, 15 box cover, 16 air inlet, 2 guide channel, 21 circulation channel, 3 guide plate, 4 guide unit, 41 flow channel, 42 guide valve, 421 sealing part, 422 elastic part, 5 external explosion-proof valve, 6 battery cell explosion-proof valve, 7 battery cell pole, 8 partition plate, 9 battery cell. DETAILED DESCRIPTION

[0055] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0056] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0057] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0058] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0059] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0060] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0061] Figure 1 It is a three-dimensional schematic diagram of a battery installation mechanism according to an embodiment of the present application, which can be used to install a battery cell 9, comprising: a frame 1 having at least one receiving groove 14 for arranging and installing a battery cell group along a first direction, a guide channel 2 arranged inside the frame 1 and configured to be connected to the battery cell explosion-proof valve 6, a guide plate 3 configured to be at least two and respectively installed on the inner walls of both sides of the receiving groove 14 along the second direction, a guide unit 4 arranged in sequence inside the guide plate 3 along the first direction and arranged one-to-one with the air inlet 16 and the battery cell explosion-proof valve 6, and a guide unit 4 installed on the frame 1 outer wall and an external explosion-proof valve 5 communicating with the guide channel 2, each battery cell 9 is provided with a battery cell explosion-proof valve 6 on one of the two side walls along the second direction, and a plurality of air inlets 16 communicating with the guide channel 2 are opened on the side of the accommodating groove 14 close to the guide plate 3; the two ends of the guide unit 4 are respectively connected to the air inlet 16 and the battery cell explosion-proof valve 6, and are configured to control the air flow between the two when the gas pressure of the battery cell 9 is greater than a preset value, and to control the air flow between the two when the gas pressure of the battery cell 9 is less than the preset value; the external explosion-proof valve 5 is configured to open when the gas inside the guide channel 2 reaches a preset pressure to discharge it out of the frame 1.

[0062] refer to Figures 1-9 Under this arrangement, the battery installation mechanism described in this article can discharge the high-temperature flue gas generated during thermal runaway out of the frame 1 according to a preset path through the guide channel 2 set inside the frame 1, which can effectively prevent the high-voltage short circuit and arc phenomenon caused by the metal melt adhering to the connection of the module copper busbar, thereby reducing the risk of electric sparks igniting the combustible gas in the battery; by making the guide unit 4, the air inlet 16 and the battery cell explosion-proof valve 6 correspond one to one, the high-temperature flue gas generated by a single battery cell 9 during thermal runaway can be discharged separately into the guide channel 2 through the guide unit 4, and then discharged from the frame 1 through the external explosion-proof valve 5. The guide units 4 at the remaining battery cells 9 that have not experienced thermal runaway are normally closed, thereby effectively preventing the high-temperature eruption from spreading to the surrounding battery cells 9, reducing the impact of high-temperature gas on other battery cells 9. The setting of the external explosion-proof valve 5 prevents external air from entering the guide channel 2, further reducing the risk of thermal runaway in a larger range.

[0063] It should be noted that when the internal pressure of the battery cell 9 is lower than the set threshold, the battery cell explosion-proof valve 6 remains closed to allow the battery cell 9 to operate normally. Once the internal pressure of the battery cell 9 reaches or exceeds this threshold, the battery cell explosion-proof valve 6 will automatically open and release the internal gas to reduce the pressure inside the battery cell 9, preventing the battery cell 9 from rupturing or exploding due to excessive pressure.

[0064] The following will introduce further specific implementation or refinement and improvement process of the battery installation mechanism through exemplary descriptions, so as to further illustrate improvement considerations in other aspects.

[0065] Furthermore, the diversion channels 2 are configured into at least two and are not connected to each other. The multiple battery cell explosion-proof valves 6 located on the same side of each column of battery cell groups are configured to be connected to one of the at least two diversion channels 2, and the multiple battery cell explosion-proof valves 6 located on the other side are configured to be connected to the other of the at least two diversion channels 2.

[0066] It is not difficult to see that the battery cell explosion-proof valve 6 on the same side of the battery cell group is connected to one of the diversion channels 2, and the battery cell explosion-proof valve 6 on the other side is connected to the other diversion channel 2. The diversion channels 2 are independently arranged and isolated from each other, so that the gas generated when the battery cell 9 thermal runaway is discharged separately along the preset path, reducing the risk of gas diffusion that may occur due to centralized diversion.

[0067] Further, refer to Figure 9 At least two diversion channels 2 are stacked in sequence inside the frame 1 along the third direction, and the external explosion-proof valve 5 is connected to each diversion channel 2.

[0068] It can be seen that the above-mentioned guide channels 2 are stacked inside the frame 1 along the third direction. Under the premise of ensuring that the guide channels 2 are not connected to each other, the structure of the frame 1 is effectively utilized, and the internal cavity of the frame 1 is used as an exhaust channel. No additional parts are added, the structural design is relatively compact and the degree of integration is high.

[0069] Specifically, the external explosion-proof valve 5 is connected to each guide channel 2, and when the internal gas reaches a preset pressure, it opens and discharges it, so that the guide channel 2 is not connected to the outside world, thereby effectively avoiding the acceleration of combustion caused by external air entering the frame 1, and further reducing the risk of thermal runaway spread.

[0070] It should be noted that, in addition to being stacked in sequence along the third direction, the above-mentioned guide channels 2 can also be stacked along other directions such as the first direction or the second direction, or irregularly distributed in the internal chamber of the frame 1, as long as they are not interconnected and are correspondingly connected to the battery cell explosion-proof valve 6 on the battery cell 9. Regarding the specific setting method of the guide channel 2, this embodiment does not make any specific restrictions here.

[0071] In actual operation of this embodiment, reference Figure 5-Figure 9 The guide unit 4 includes: a flow channel 41 that is opened along the thickness direction of the guide plate 3 and whose two ends are respectively connected to the battery cell explosion-proof valve 6 and the air inlet 16, and a guide valve 42 arranged at one end of the flow channel 41 close to the air inlet 16. The flow channels 41 of each guide unit 4 are not connected to each other; the guide valve 42 is configured to connect the flow channel 41 and the air inlet 16 when the gas pressure in the flow channel 41 is greater than a preset value, and to block the flow channel 41 and the air inlet 16 when the gas pressure in the flow channel 41 is less than the preset value.

[0072] It can be known that the above-mentioned diversion unit 4 is configured as a flow channel 41 and a diversion valve 42 arranged inside the flow channel 41. One end of the flow channel 41 is always connected to the valve port of the battery cell explosion-proof valve 6, and the other end is controlled by the diversion valve 42, so that it can be controlled to be connected or blocked with the air inlet 16 according to the gas pressure inside the flow channel 41, effectively reducing the impact of the gas generated when a single battery cell 9 has thermal runaway on the remaining battery cells 9.

[0073] For further reference, Figure 6 The diverter valve 42 includes: a blocking member 421 abutting against the end of the flow channel 41 near the air inlet 16, and an elastic member 422 whose two ends are respectively connected to the blocking member 421 and the inner wall of the diverter channel 2 opposite to the air inlet 16; the blocking member 421 is configured to approach or move away from the inner wall of the end of the flow channel 41 under the combined force of the gas and the elastic member 422, so as to close or open the end of the flow channel 41 near the air inlet 16.

[0074] It is not difficult to see that the reference Figure 6 , using the elastic member 422 and the sealing member 421, when the high-temperature and high-speed gas is ejected from the battery cell explosion-proof valve 6, the pressure acts on the sealing member 421 under the guidance of the internal flow channel 41 of the guide plate 3, thereby overcoming the elastic force of the elastic member 422, opening the port of the cold runner 41 near the air inlet 16, and then further introducing the gas into the guide channel 2, and finally converging at the external explosion-proof valve 5 for discharge.

[0075] In one case of this embodiment, reference Figure 6 Both end ports of the flow channel 41 are configured as tapered ports with a cross-section gradually increasing from the inside to the outside, and the blocking member 421 is configured as a tapered pin that can be sealed and fitted to the inner wall of the tapered port.

[0076] It can be seen that the port close to the side of the battery cell explosion-proof valve 6 is set to a conical port, which can effectively collect the gas generated by the battery cell explosion-proof valve 6, and at the same time be used to absorb the error during assembly, thereby ensuring the directional discharge of the gas; the conical port on the other side can be fitted with the inclined surface of the conical pin under the support of the elastic member 422 to form a sealing surface, thereby effectively ensuring that the flow channel 41 is normally closed at one end of the port close to the air inlet 16 when the battery cell 9 is normal, and the design of the conical pin facilitates subsequent installation and positioning to ensure sealing.

[0077] Exemplarily, the above-mentioned conical mouth can also be set to other shapes, and the above-mentioned sealing member 421 can also be a block that abuts against the port at one end of the flow channel 41 close to the air inlet 16 and is adapted to its shape; the elastic member 422 can be set to a spring or a compression spring, and the sealing member 421 is reset by the elastic force to ensure that the port of the flow channel 41 is normally closed; the shapes of the ports at both ends of the flow channel 41, and the specific selection of the sealing member 421 and the elastic member 422 are not restrictive provisions of this embodiment.

[0078] It should be noted that the above-mentioned guide unit 4 can also be a control valve arranged inside the guide plate 3 and connected to the battery cell explosion-proof valve 6 and the air inlet 16 at both ends respectively. The airflow conduction or airflow blocking between the air inlet 16 and the battery cell explosion-proof valve 6 is controlled according to the gas pressure of the battery cell 9. Multiple control valves cooperate to discharge the gas generated by the battery cell 9 separately into the guide channel 2. The specific type and structure of the above-mentioned guide unit 4 are not restrictive provisions of this embodiment.

[0079] In another case of this embodiment, reference Figure 2 and Figure 3 The frame 1 includes: a frame 11, a first crossbeam 12 whose two ends are respectively connected to the inner walls of the frame 11 on both sides along the first direction and are configured as one, and a second crossbeam 13 whose two ends are respectively connected to the inner walls of the frame 11 on both sides along the first direction, the second crossbeam 13 is parallel to the first crossbeam 12 and is provided with at least one along the second direction, a receiving groove 14 is formed between the first crossbeam 12, the frame 11, and the second crossbeam 13, and another receiving groove 14 is formed between the second crossbeam 13 and the frame 11; the air inlet 16 is opened at: the outer walls of both sides of each second crossbeam 13 along the second direction, the inner wall of the side opposite to the second crossbeam 13 of the frame 11, and the outer wall of the side opposite to the first crossbeam 12 and the second crossbeam 13, and the guide plate 3 is correspondingly attached to the side of each column of air inlets 16 to make the internal guide unit 4 face the air inlet 16 one by one.

[0080] It is not difficult to see that the frame 1 is set as a structure composed of a frame 11, a first crossbeam 12 and a second crossbeam 13, which can form at least three diversion channels 2, corresponding to the exhaust of two adjacent rows of battery cell groups inside the two receiving grooves 14, wherein the multiple battery cell explosion-proof valves 6 on the same side of the battery cell group located inside the same receiving groove 14 are connected to one of the diversion channels 2, and the diversion channels 2 are independently set and isolated from each other, reducing the risk of high-temperature gas diffusion that may occur during centralized diversion.

[0081] In a more specific embodiment, reference Figure 2 and Figure 3 The two rows of air inlets 16 on the outer walls on both sides of the second beam 13 along the second direction, the two rows of air inlets 16 on the inner wall of the frame 11 and the outer wall of the second beam 13 opposite to it, and the two rows of air inlets 16 on the outer wall of the first beam 12 and the outer wall of the second beam 13 opposite to it are all staggered.

[0082] It can be seen that the staggered distribution of the single-row air inlets 16 at different positions facilitates the correspondence with the staggered distribution of the battery cell explosion-proof valves 6 on different sides of the battery cell 9, thereby achieving a one-to-one correspondence between each air inlet 16 and the battery cell explosion-proof valve 6.

[0083] Based on this arrangement, refer to Figure 8 and Figure 9 , and also includes three circulation channels 21 stacked in sequence inside the frame 11 along the third direction; one of the three circulation channels 21 and the inner cavity of the first crossbeam 12 communicating therewith together form a guide channel 2, another of the three circulation channels 21 and the inner cavity of the second crossbeam 13 communicating therewith together form another guide channel 2, and the remaining one of the three circulation channels 21 connected to the air inlet 16 on the frame 11 forms another guide channel 2.

[0084] For further reference, Figure 5 , further comprising: a partition plate 8 disposed inside each circulation channel 21 and configured to block the three guide channels 2 from being connected to each other.

[0085] Furthermore, the external explosion-proof valve 5 is installed on the outer wall of the frame 11 and is communicated with the three circulation channels 21 at the same time.

[0086] It can be seen that by using the partition plate 8 provided on the circulation channel 21, the effective length of the circulation channel 21 can be effectively shortened, thereby further reducing the diffusion risk of the high-temperature gas inside the circulation channel 21, and the external explosion-proof valve 5 is provided on the outer wall of the frame 11, which can prevent the circulation channel 21 from being connected to the outside world. Each guide channel 2 is not connected to the outside world, thereby avoiding the acceleration of combustion caused by the outside air entering the frame 1.

[0087] It should be noted that the arrangement of the above-mentioned air inlet 16 mainly corresponds to the arrangement of the battery cell explosion-proof valve 6 on the adjacent battery cell 9, and the above-mentioned three circulation channels 21 correspond one-to-one to a first beam 12, a second beam 13 and the inner cavity of the frame 11 near the end, and are not connected to each other. Of course, the number of the second beams 13 along the second direction can also be multiple, and the corresponding number of the circulation channels 21 is also set to multiple. Therefore, the number of the second beams 13 and the circulation channels 21 can be adjusted as needed, and this embodiment does not make specific limitations here.

[0088] refer to Figure 10 、 Figure 11 and Figure 12 ,in Figure 10 This is a schematic diagram of the gas flow when thermal runaway gas is generated inside the second crossbeam 13. When thermal runaway occurs in the battery cell 9, the battery cell explosion-proof valve 6 located at one end of the battery cell 9 opens, and then the thermal runaway fluid passes through the guide plate 3 and, after reaching a suitable pressure, the guide unit 4 opens to enter the internal chamber of the second crossbeam 13. The fluid then flows into one of the circulation channels 21 connected to the internal chamber of the second crossbeam 13, and finally flows through the circulation channel 21 to the external explosion-proof valve 5 and then out of the frame 1. This achieves precise discharge of gas when a single battery cell experiences thermal runaway, avoiding affecting other battery cells.

[0089] Specifically, since the internal chamber of the second beam 13 is not connected to the inner chamber of the first beam 12 or the frame 11 near the end, the circulation channels 21 stacked along the height direction are also not connected to each other. Therefore, the first beam 12 and one of the circulation channels 21 connected thereto form a guide channel 2, the second beam 13 and one of the circulation channels 21 connected thereto form a guide channel 2, another circulation channel 21 is formed inside the frame near the end, and a guide channel 2 is formed. The three guide channels 2 are not connected to each other and are independent of each other, corresponding to the thermal runaway gas diversion of the battery cells 3 at different positions.

[0090] in Figure 11 This is a schematic diagram of the gas flow when thermal runaway gas is generated inside the first crossbeam 12. When thermal runaway occurs in the battery cell 9, the battery cell explosion-proof valve 6 located at one end of the battery cell 9 opens, and then the thermal runaway fluid passes through the guide plate 3, opens the guide unit 4 after reaching the appropriate pressure, and enters the internal chamber of the first crossbeam 12, and then flows into one of the circulation channels 21 connected to the internal chamber of the first crossbeam 12, and finally flows through the circulation channel 21 to the external explosion-proof valve 5 and then discharges from the frame 1.

[0091] in Figure 12This is a schematic diagram of the gas flow when thermal runaway gas is generated inside the inner cavity near the end frame 11. When thermal runaway occurs in the battery cell 9, the battery cell explosion-proof valve 6 located at one end of the battery cell 9 is opened, and then the thermal runaway fluid passes through the guide plate 3, and after reaching the appropriate pressure, the guide unit 4 is opened to enter the inner cavity near the end frame 11, that is, the inner cavity of the third circulation channel 21, and then flows through the circulation channel 21 to the external explosion-proof valve 5 and then discharged from the frame 1.

[0092] In one case of this embodiment, one of the guide plate 3 and the frame 1 is provided with a threaded hole, and the other is provided with a light hole, and is configured to connect the guide plate 3 to the frame 1 by passing a bolt through the light hole and screwing it into the threaded hole.

[0093] It can be known that the above-mentioned guide plate 3 is installed on the frame 1 by means of bolts, and can be freely disassembled and assembled as needed. Of course, the detachable connection between the guide plate 3 and the frame 1 can also be achieved by a snap-on connection. For example, one of the guide plate 3 and the frame 1 is provided with a card block, and the other is provided with a card slot, and the connection between the guide plate 3 and the frame 1 is achieved by snapping the card block and the card slot.

[0094] In another case of this embodiment, reference Figure 13 , further comprising: a box cover 15 provided on the top of the frame body 1, and a sealing ring provided at the connection between the box cover 15 and the frame body 1 and configured to seal the gap between the two.

[0095] It is not difficult to see that the box cover 15 is provided to cover the end of the frame 1 away from the bottom plate, and the sealing ring can seal the two together, thereby forming a sealed space inside for installing the battery cell 9.

[0096] For example, the sealing ring may be, but is not limited to, a rubber ring, a foam pad, etc. It may also be a square sealing strip. The cross-sectional shape may need to be selected, and this embodiment does not make any specific limitation here.

[0097] As an example, the battery cell 9 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. This embodiment does not make specific limitations here.

[0098] This embodiment further provides a battery pack, including a battery module and the above-described battery mounting mechanism, wherein the battery module is installed in at least one receiving slot 14 .

[0099] Furthermore, the battery module includes a plurality of battery cells 9 arranged in sequence along the first direction, and each battery cell 9 is provided with a battery pole 7, and the plurality of battery poles 7 are connected in series through a bus bar.

[0100] It can be known that the battery module is arranged in the above-mentioned battery installation mechanism, and the guide unit 4, the air inlet 16 and the battery cell explosion-proof valve 6 are matched one by one. The high-temperature flue gas generated by a single battery cell 9 during thermal runaway is discharged separately into the guide channel 2 through the guide unit 4, and then discharged from the frame 1 through the external explosion-proof valve 5. The guide units 4 at the remaining battery cells 9 where thermal runaway has not occurred are normally closed, thereby effectively preventing high-temperature eruptions from spreading to the surrounding battery cells 9 and reducing the impact of high-temperature gas on other battery cells 9. The setting of the external explosion-proof valve 5 prevents external air from entering the guide channel 2. The guide channel 2 is not connected to the outside world, which further reduces the risk of thermal runaway in a larger range.

[0101] It should be noted that the above-mentioned battery module can be a lithium-ion battery, a sodium-ion battery, a sodium-potassium-ion battery, a lithium metal battery, a sodium metal battery, a potassium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-potassium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited to this.

[0102] The above examples mainly illustrate the battery mounting mechanism of the present application and the battery pack including the battery mounting mechanism. Although only some of the embodiments of the present application are described, it should be understood by those skilled in the art that the present application can be implemented in many other forms without departing from its subject matter and scope. Therefore, the examples and embodiments shown are to be regarded as illustrative rather than restrictive, and the present application may cover various modifications and replacements without departing from the spirit and scope of the technical solution of the present application.

Claims

1. Battery installation mechanism, characterized in that, include: The frame is configured to have at least one receiving slot formed therein for arranging and mounting a battery cell group along a first direction, and each battery cell is provided with a battery cell explosion-proof valve on one of two side walls along a second direction; a diversion channel, disposed inside the frame and configured to be connected to the battery cell explosion-proof valve; At least two guide plates are provided and are respectively mounted on the inner walls of both sides of the receiving groove along the second direction, and a plurality of air inlets communicating with the guide channel are opened on a side of the receiving groove close to the guide plates; A flow guide unit is sequentially arranged inside the guide plate along the first direction and is provided in a one-to-one correspondence with the air inlet and the battery cell explosion-proof valve; two ends of the flow guide unit are respectively connected to the air inlet and the battery cell explosion-proof valve, and are configured to control the flow of gas between the two when the battery cell gas pressure is greater than a preset value, and to control the flow of gas between the two when the battery cell gas pressure is less than the preset value; The external explosion-proof valve is installed on the outer wall of the frame and communicates with the guide channel. The valve is configured to open when the gas in the guide channel reaches a preset pressure to discharge the gas out of the frame.

2. The battery installation mechanism according to claim 1, characterized in that: The diversion channels are configured as at least two and are not connected to each other. The multiple battery cell explosion-proof valves located on the same side of each column of battery cell groups are configured to be connected to one of the at least two diversion channels, and the multiple battery cell explosion-proof valves located on the other side are configured to be connected to the other of the at least two diversion channels.

3. The battery installation mechanism according to claim 2, characterized in that: The at least two diversion channels are sequentially stacked inside the frame along the third direction, and the external explosion-proof valve is connected to each of the diversion channels.

4. The battery installation mechanism according to claim 1, characterized in that: The flow guiding unit comprises: A flow channel is opened through the thickness direction of the guide plate, and its two ends are respectively connected to the battery cell explosion-proof valve and the air inlet, and the flow channels of each guide unit are not connected to each other; The diverter valve is arranged at one end of the flow channel close to the air inlet, and is configured to connect the flow channel and the air inlet when the gas pressure in the flow channel is greater than a preset value, and to block the flow channel and the air inlet when the gas pressure in the flow channel is less than the preset value.

5. The battery installation mechanism according to claim 4, characterized in that: The diverter valve comprises: a blocking member abutting against a port of the flow channel close to one end of the air inlet; an elastic member, the two ends of which are respectively connected to the blocking member and the inner wall of the guide channel opposite to the air inlet; The blocking member is configured to move closer to or farther away from the inner wall of the flow channel port under the combined force of the gas and the elastic member, so as to close or open the port of the flow channel close to one end of the air inlet.

6. The battery installation mechanism according to claim 5, characterized in that: Both end ports of the flow channel are configured as tapered ports with gradually increasing cross-sections from the inside to the outside, and the blocking member is configured as a tapered pin that can be sealed and fitted to the inner wall of the tapered port.

7. The battery installation mechanism according to claim 1, characterized in that: The frame includes: frame; A first crossbeam, having two ends respectively connected to two inner walls of the frame along the first direction, and configured as one; A second crossbeam, with both ends connected to the inner walls of the frame along the first direction, parallel to the first crossbeam and provided with at least one along the second direction, a receiving groove being formed between the first crossbeam, the frame, and the second crossbeam, and another receiving groove being formed between the second crossbeam and the frame; The air inlets are opened on: the outer walls on both sides of each second beam along the second direction, the inner wall on the side of the frame opposite to the second beam, and the outer wall on the side opposite to the first beam and the second beam. The guide plates are correspondingly attached to the sides of each column of the air inlets to make the internal guide units face the air inlets one by one.

8. The battery installation mechanism according to claim 7, characterized in that: The two rows of air inlets on the outer walls on both sides of the second beam along the second direction, the two rows of air inlets on the inner wall of the frame and the outer wall of the second beam opposite to it, and the two rows of air inlets on the outer wall of the first beam and the outer wall of the second beam opposite to it are all staggered.

9. The battery installation mechanism according to claim 7 or 8, characterized in that: Also includes: The circulation channels are configured in three and are stacked and arranged in sequence along the third direction inside the frame; One of the three circulation channels and the inner cavity of the first beam communicating therewith together form a guide channel, another one of the three circulation channels and the inner cavity of the second beam communicating therewith together form another guide channel, and the remaining one of the three circulation channels connected to the air inlet on the frame forms another guide channel.

10. The battery installation mechanism according to claim 9, characterized in that: Also includes: The partition plate is arranged inside each of the circulation channels and is configured to block the communication between the three guide channels.

11. The battery installation mechanism according to claim 9, characterized in that: The external explosion-proof valve is installed on the outer wall of the frame and is communicated with the three circulation channels at the same time.

12. The battery installation mechanism according to claim 1, wherein: One of the guide plate and the frame is provided with a threaded hole, and the other is provided with a light hole. The guide plate and the frame are configured to be connected to each other by passing a bolt through the light hole and screwing the bolt into the threaded hole.

13. The battery installation mechanism according to claim 1, characterized in that: Also includes: A box cover, which is arranged on the top of the frame; The sealing ring is arranged at the connection between the box cover and the frame body and is configured to seal the gap between the two.

14. A battery pack, characterized in that: It comprises a battery module and a battery mounting mechanism as described in any one of claims 1 to 13, wherein the battery module is filled in the at least one receiving groove.

15. The battery pack according to claim 14, characterized in that: The battery module includes a plurality of battery cells arranged in sequence along a first direction, and each of the battery cells is provided with a battery pole, and the plurality of battery poles are connected in series via a bus bar.

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