Box body and battery system
By designing the enclosure structure, the battery pack achieves zoned thermal management and independent venting, solving the problem of inter-module thermal runaway ignition and improving the safety and thermal management efficiency of the battery system.
Patent Information
- Application Number
- CN202520018420.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-03
AI Technical Summary
In existing battery packs, regionalized thermal management cannot be achieved between modules. The shared exhaust channel leads to the risk of mutual ignition between modules in the event of thermal runaway, threatening the safety of the cockpit.
Design a box structure comprising a main body and an exhaust beam. The housing cavity is connected to the outside through an independent exhaust channel. It is equipped with an induction fire extinguishing device and an explosion-proof valve to achieve zoned thermal management and independent exhaust.
By using independent exhaust channels and fire extinguishing devices, the risk of inter-module ignition during thermal runaway events is reduced, thermal management efficiency and safety are improved, and the risk of damage from high-temperature gases is reduced.
Smart Images
Figure CN223743744U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the battery technical field, especially to a box and battery system. BACKGROUND
[0002] As the core component of electric vehicles, the safety of battery packs gradually highlights, especially the lightweight and safety design of internal modules.
[0003] Most of the existing battery packs currently adopt a module structure installed in a box. Since the battery cells are usually designed in modules, the system structure is complex, and regionalized thermal management cannot be achieved between modules. In the event of thermal runaway and abnormal state of a single battery cell, the abnormal area cannot be identified and the other areas cannot be protected. In addition, each module usually shares an exhaust passage, which poses a risk of mutual ignition between modules in the event of thermal runaway, which can easily lead to system heat spread and even threaten the safety of the cockpit personnel. SUMMARY
[0004] The main purpose of the utility model is to provide a box and battery system, which aims to solve the problem that the modules of the battery pack cannot achieve regionalized thermal management between modules in the prior art, and each module shares an exhaust passage, which poses a risk of mutual ignition between modules in the event of thermal runaway.
[0005] To achieve the above-mentioned utility model purposes, the utility model discloses a box in the first aspect, comprising a main body and an exhaust beam;
[0006] The main body defines a containing space, the containing space includes a plurality of containing cavities for containing battery cell modules, wherein each containing cavity includes at least one exhaust beam, the exhaust beam is provided with an exhaust passage, the containing cavity is communicated with the outside space of the containing cavity through the exhaust passage, and the exhaust passages of the corresponding exhaust beams of the other containing cavities are not communicated.
[0007] Further, the exhaust beam includes a first exhaust sub-beam and a second exhaust sub-beam connected to each other, the first exhaust sub-beam is provided with a first air inlet hole and a first exhaust sub-passage, the second exhaust sub-beam is provided with a second exhaust sub-passage and a first air inlet hole, the first air inlet hole faces the inside of the containing cavity, the second exhaust sub-passage is communicated with the first exhaust sub-passage, the first air inlet hole faces the outside of the containing cavity, and each first air inlet hole faces a different position.
[0008] Further, the first air inlet hole is arranged towards the tab of the battery cell module.
[0009] Further, the box further comprises an isolation beam, the isolation beam is arranged between two adjacent containing cavities to separate the two adjacent containing cavities.
[0010] Further, the main body comprises a frame and a bottom plate connected with each other, the frame comprises a plurality of side beams, and the plurality of side beams and the bottom plate are fixedly connected to jointly define the accommodation space, the second exhaust sub-beam of each accommodation cavity is arranged close to a corresponding side beam, and the side beam is provided with a fourth exhaust sub-channel that faces the outside of the accommodation space, and the second exhaust sub-channel of each accommodation cavity is in communication with the corresponding fourth exhaust sub-channel.
[0011] Further, the box further comprises reinforcing beams arranged on the bottom plate, the second exhaust sub-beam of each accommodation cavity is connected to the side beam through the corresponding reinforcing beam, the reinforcing beam is provided with a fifth exhaust sub-channel, and the fifth exhaust sub-channel is in communication with the fourth exhaust sub-channel.
[0012] Further, the reinforcing beam is provided with a first mounting structure for assembling an induction fire extinguishing device, and the side beam is provided with a second mounting structure for assembling an explosion-proof valve corresponding to the position of the fourth exhaust sub-channel.
[0013] Further, the exhaust beam further comprises a third exhaust sub-beam, the third exhaust sub-beam is provided with a second air inlet hole, a third exhaust sub-channel and a second air outlet hole, the second air inlet hole faces the inside of the accommodation cavity, the second air outlet hole faces the outside of the accommodation cavity, and the third exhaust sub-channel is in communication with the second air inlet hole and the second air outlet hole.
[0014] The accommodation cavities comprise accommodation cavities located at the middle side of the accommodation space and accommodation cavities located at the corners of the accommodation space, the accommodation cavities located at the middle side of the accommodation space are exhausted through the corresponding third exhaust sub-beams, and the accommodation cavities located at the corners of the accommodation space are exhausted through the corresponding first exhaust sub-beams and second exhaust sub-beams.
[0015] The utility model discloses a second aspect provides a battery system, comprising the box and a plurality of electric core module of any embodiment described above, a plurality of electric core module is housed in a plurality of accommodation cavity.
[0016] Further, the battery system further comprises an induction fire extinguishing device and an explosion-proof valve, the induction fire extinguishing device is arranged on the reinforcing beam of the box, and the explosion-proof valve is arranged on the side beam of the box.
[0017] Beneficial effects:
[0018] The utility model discloses a box and battery system, there are multiple containing cavities in the main part, and each containing cavity is not communicated with each other, that is to say, the containing cavity space of each battery cell module is independent, and the partition heat management is convenient for realizing, and simultaneously, since each containing cavity is surrounded by at least one exhaust beam, the exhaust beam is provided with exhaust passage, and the exhaust passage of the exhaust beam at each containing cavity is not communicated, and thus, the containing cavity of each battery cell module is provided with independent exhaust passage, and the partition exhaust can be realized, and the risk of mutual ignition between modules in the thermal runaway event is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the box structure schematic diagram of an embodiment of the utility model,
[0020] Figure 2 It is the box overhead structure schematic diagram of an embodiment of the utility model,
[0021] Figure 3 It is the box exhaust principle schematic diagram of an embodiment of the utility model,
[0022] Figure 4 It is the box exhaust principle schematic diagram of another embodiment of the utility model,
[0023] Figure 5 It is the box explosion structure schematic diagram of an embodiment of the utility model,
[0024] Figure 6 It is the battery cell module explosion structure schematic diagram of an embodiment of the utility model.
[0025] Among them,
[0026] 100-box, 110-main body, 111-frame, 1111-side beam, 112-bottom plate, 120-exhaust beam, 121-first exhaust sub beam, 122-second exhaust sub beam, 123-third exhaust sub beam, 130-accommodation space, 131-containing cavity, 140-exhaust passage, 141-first air inlet hole, 142-first exhaust sub passage, 143-second exhaust sub passage, 144-third exhaust sub passage, 145-fourth exhaust sub passage, 146-fifth exhaust sub passage, 150-isolation beam, 160-stiffener, 200-battery cell module, 210-battery cell, 220-protection layer, 230-cotton, 240-tab support, 300-pressing plate, 400-box cover, 500-induction fire extinguishing device, 600-explosion-proof valve.
[0027] The realization of the utility model, functional characteristics and advantages will be further explained with reference to the drawings. DETAILED DESCRIPTION
[0028] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.
[0029] In the description of the present application, it should be understood that the relative or positional terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0030] In the description of the present application, it should be understood that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0031] In the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0032] Referring to Figures 1 to 3 , an embodiment of the present application provides a box 100, which comprises a main body 110 and an exhaust beam 120.
[0033] The main body 110 defines a containing space 130, which includes a plurality of containing cavities 131 for accommodating the battery cell modules 200, wherein each containing cavity 131 includes at least one exhaust beam 120, the exhaust beam 120 is provided with an exhaust passage 140, the containing cavity 131 is communicated with the outside space of the containing cavity 131 through the exhaust passage 140, and the exhaust passages 140 of the exhaust beams 120 corresponding to other containing cavities 131 are not communicated.
[0034] In the embodiment, the main body 110 is used to support the entire battery system, and the containing space 130 includes a plurality of containing cavities 131 for accommodating the battery cell modules 200 according to the requirement of assembling the battery cell modules 200, and the battery cell modules 200 can be assembled into the containing cavities 131 one by one. Each containing cavity 131 is not communicated with each other, that is, the containing cavities 131 of each battery cell module 200 form independent spaces, which facilitates the realization of partitioned thermal management. Referring to Figure 5 In an embodiment, the box body 100 further includes a pressing plate 300 and a box cover 400, the pressing plate 300 is arranged above the battery cell modules 200, the box cover 400 is detachably connected with the main body 110, the pressing plate 300 is used to limit the battery cell modules 200 in the respective containing cavities 131, and the battery cell modules 200 are reduced to move up and down, and the box cover 400 plays a role of closing the main body 110.
[0035] The main body 110 has a plurality of containing cavities 131, each containing cavity 131 is surrounded by at least one exhaust beam 120 and is not communicated with each other, and the plurality of exhaust beams 120 in the main body 110 can play a role of strengthening the main body 110. The exhaust passage 140 is arranged in the interior of the exhaust beam 120, so that the exhaust beam 120 of the embodiment not only can strengthen the structural strength of the main body 110, but also can provide independent exhaust space, realize thermal-electric separation, reduce the risk of short circuit caused by high-temperature gas destroying the high-voltage copper bar in the thermal runaway event, and reduce the risk of losing control caused by high-temperature gas destroying the BMS.
[0036] Since the exhaust passages 140 of the exhaust beams 120 at each containing cavity 131 are not communicated, each containing cavity 131 of each battery cell module 200 is provided with an independent exhaust passage 140, when a certain battery cell module 200 is in thermal runaway, the gas F generated by the thermal runaway can be independently exhausted to the outside space of the containing cavity 131 through the exhaust passage 140 of the exhaust beam 120 at the containing cavity 131, without affecting the battery cell modules 200 at other containing cavities 131, thereby reducing the risk of mutual ignition between the modules in the thermal runaway event.
[0037] The utility model discloses a box 100, the plurality of containing cavities 131 in main body 110, every containing cavity 131 does not communicate with each other, that is, the containing cavity 131 space of every electric core module 200 is independent, and the partition heat management is convenient for realizing, simultaneously, because every containing cavity 131 is surrounded by at least one exhaust beam 120, and the exhaust beam 120 is provided with exhaust passage 140, and the exhaust passage 140 of exhaust beam 120 at every containing cavity 131 does not communicate, and thus, the containing cavity 131 of every electric core module 200 is provided with independent exhaust passage 140, and the partition exhaust can be realized, and the risk of mutual ignition between modules in thermal runaway event is reduced.
[0038] Referring to Figures 1 to 3 In an embodiment, the exhaust beam 120 includes a first exhaust sub-beam 121 and a second exhaust sub-beam 122 connected to each other, the first exhaust sub-beam 121 is provided with a first air inlet hole 141 and a first exhaust sub-passage 142, the second exhaust sub-beam 122 is provided with a second exhaust sub-passage 143 and a first air outlet hole (not shown in the figure), the first air inlet hole 141 faces the inside of the containing cavity 131, the second exhaust sub-passage 143 communicates with the first exhaust sub-passage 142, the first air outlet hole faces the outside of the containing cavity 131, and each first air outlet hole faces a different position.
[0039] In the embodiment, the second exhaust sub-passage 143 communicates with the first exhaust sub-passage 142, the first exhaust sub-beam 121 is used to guide the gas F generated by the thermal runaway of the electric core module 200 in the containing cavity 131 to the second exhaust sub-beam 122, and the second exhaust sub-beam 122 is used to discharge the gas F to the outside space of the containing cavity 131. By arranging the first exhaust sub-beam 121 and the second exhaust sub-beam 122, and the first air outlet hole facing different positions, the exhaust passage 140 of each containing cavity 131 is staggered, so that the exhaust passage 140 of each containing cavity 131 is independent, and it is ensured that the containing cavity 131 of each electric core module 200 is provided with an independent exhaust passage 140.
[0040] Referring to Figure 1 In an embodiment, the first air inlet hole 141 is a plurality of first air inlet holes 141 arranged in an array, the shape of the first air inlet hole 141 can be any one or more of a circle, a rectangle, a rounded rectangle, or other shapes, which are not limited here.
[0041] Referring to Figure 1 And Figure 3 In an embodiment, the first air inlet hole 141 faces the tab of the electric core module 200.
[0042] Since the thermal runaway gas F is generated from the tab positions of the battery cell module 200, the first air inlet hole 141 is arranged towards the tab of the battery cell module 200, so that the thermal runaway gas F can quickly pass through the first air inlet hole 141 into the first exhaust sub-channel 142, ensuring smooth exhaust.
[0043] Referring to Figure 2 and Figure 3 In an embodiment, the box 100 further comprises a separation beam 150, which is arranged between two adjacent accommodation cavities 131 in the first direction or the second direction to separate the two adjacent accommodation cavities 131.
[0044] In this embodiment, the separation beam 150 is arranged between two adjacent accommodation cavities 131 in the first direction (e.g., the Y-axis direction as shown) or the second direction (e.g., the X-axis direction as shown) to separate the two adjacent accommodation cavities 131. Figure 2 Figure 2 At the same time, the exhaust beam 120 and the separation beam 150 play an important role in strengthening the overall box 100.
[0045] The separation beam 150 and the exhaust beam 120 separate the accommodation space 130 of the main body 110 into a plurality of accommodation cavities 131 arranged in an MxN array structure, M is the total number of accommodation cavities 131 in the first direction, N is the total number of accommodation cavities 131 in the second direction, and M and N are both positive integers.
[0046] Since the first air inlet hole 141 needs to be directed towards the tab of the battery cell module 200, each first exhaust sub-beam 121 is arranged in the first direction. On this basis, the first exhaust sub-beam 121, the second exhaust sub-beam 122 and the separation beam 150 are adaptively arranged according to the actual array structure of the accommodation cavities 131.
[0047] For example, when M=1 and N=2, the overall accommodation cavities 131 are arranged in a 1x2 array structure, the separation beam 150 is arranged between the two columns of accommodation cavities 131 in the first direction and connected to the respective first exhaust sub-beams 121.
[0048] When M=2 and N=1, the overall accommodation cavities 131 are arranged in a 2x1 array structure, the separation beam 150 is arranged between the two rows of accommodation cavities 131 in the second direction and connected to the respective second exhaust sub-beams 122.
[0049] When M=2 and N=2, the overall accommodation cavities 131 are arranged in a 2x2 array structure, the separation beam 150 is arranged between the two columns of accommodation cavities 131 in the first direction and connected to the respective first exhaust sub-beams 121. Referring to Figure 2 , there are four accommodation cavities 131, forming a "field" - shaped structure, namely regions V1, V2, V3, and V4. Each accommodation cavity 131 is surrounded by an isolation beam 150 arranged along the first direction, two first exhaust sub - beams 121 arranged along the second direction, and a second exhaust sub - beam 122 arranged along the first direction. Refer to Figure 3 , the exhaust path of the battery system (as shown by the dotted arrow in Figure 3 ) takes the accommodation cavity 131 in the V1 region as an example: The thermal runaway gas F of the battery cell module 200 is generated from the positions of the two - side pole ears of the battery cell module 200, enters the first exhaust sub - channels 142 of the upper and lower first exhaust sub - beams 121 respectively, then enters the second exhaust sub - channel 143 of the second exhaust sub - beam 122 in sequence, and is discharged outside the accommodation cavity 131 after accumulating a certain pressure in the second exhaust sub - channel 143. The exhaust paths of the accommodation cavities 131 in the V2, V3, and V4 regions are the same.
[0050] Refer to Figures 2 to 4 , in an embodiment, the main body 110 includes a frame 111 and a bottom plate 112 connected to each other. The frame 111 includes a plurality of side beams 1111. The plurality of side beams 1111 and the bottom plate 112 are fixedly connected and jointly define the accommodation space 130. The second exhaust sub - beam 122 of each accommodation cavity 131 is disposed close to the corresponding side beam 1111. The side beam 1111 is provided with a fourth exhaust sub - channel 145 facing the outside of the accommodation space 130. The second exhaust sub - channel 143 of each accommodation cavity 131 is respectively communicated with its corresponding fourth exhaust sub - channel 145.
[0051] In this embodiment, the bottom plate 112 is used to support the entire battery system, and the frame 111 includes a plurality of side beams 1111.
[0052] Refer to Figure 3 , the second exhaust sub - beam 122 of each accommodation cavity 131 is disposed close to the side beam 1111 on its side. The side beam 1111 is provided with a fourth exhaust sub - channel 145 facing the outside of the accommodation space 130. The second exhaust sub - channel 143 of the second exhaust sub - beam 122 is communicated with the fourth exhaust sub - channel 145. In this way, the gas F generated by the thermal runaway of the battery cell module 200 can sequentially pass through the first exhaust sub - channel 142 of the first exhaust sub - beam 121, the second exhaust sub - channel 143 of the second exhaust sub - beam 122, and the fourth exhaust sub - channel 145 of the side beam 1111, and is discharged outside the box body 100 after accumulating a certain pressure in the fourth exhaust sub - channel 145.
[0053] Refer to Figures 1 to 5In an embodiment, the box 100 further comprises reinforcing beams 160, each of the second exhaust sub-beams 122 is connected to the side beam 1111 through a corresponding reinforcing beam 160, and the reinforcing beam 160 is provided with a fifth exhaust sub-channel 146 which is in communication with the fourth exhaust sub-channel 145.
[0054] In the embodiment, the second exhaust sub-beam 122 has an assembly distance with the corresponding side beam 1111, and the reinforcing beam 160 connects the second exhaust sub-beam 122 and the corresponding side beam 1111, thereby further reinforcing the box 100.
[0055] In addition, each of the reinforcing beams 160 is provided with the fifth exhaust sub-channel 146 which is in communication with the fourth exhaust sub-channel 145, and the second exhaust sub-channel 143 of each of the accommodation cavities 131 is in communication with the corresponding fourth exhaust sub-channel 145. In this way, the gas F generated by the thermal runaway of the battery cell module 200 can sequentially pass through the first exhaust sub-channel 142 of the first exhaust sub-beam 121, the second exhaust sub-channel 143 of the second exhaust sub-beam 122, the fifth exhaust sub-channel 146 of the reinforcing beam 160, and the fourth exhaust sub-channel 145 of the side beam 1111, and is discharged to the outside of the box 100 after gathering a certain pressure in the fourth exhaust sub-channel 145.
[0056] Referring to Figure 4 In an embodiment, the exhaust beam 120 further comprises a third exhaust sub-beam 123, the third exhaust sub-beam 123 is provided with a second air inlet hole (not shown), a third exhaust sub-channel 144 and a second air outlet hole (not shown), the second air inlet hole is directed to the inside of the accommodation cavity 131, the second air outlet hole is directed to the outside of the accommodation cavity 131, and the third exhaust sub-channel 144 is in communication with the second air inlet hole and the second air outlet hole.
[0057] The accommodation cavities 131 include the accommodation cavities 131 located at the middle side of the accommodation space 130 and the accommodation cavities 131 located at the corners of the accommodation space 130, the accommodation cavities 131 located at the middle side of the accommodation space 130 are respectively exhausted through the corresponding third exhaust sub-beams 123, and the accommodation cavities 131 located at the corners of the accommodation space 130 are respectively exhausted through the corresponding first exhaust sub-beams 121 and second exhaust sub-beams 122.
[0058] In the embodiment, the whole accommodation cavities 131 are divided into the accommodation cavities 131 located at the middle side of the accommodation space 130 and the accommodation cavities 131 located at the corners of the accommodation space 130. Different exhaust channels 140 are configured for the accommodation cavities 131 located at different positions of the accommodation space 130.
[0059] For each accommodation cavity 131 located at the corner of the accommodation space 130, as shown in the V1, V2, V3, V4 area and as shown in the V1, V3, V4, V6 area, the first exhaust sub-beam 121 and the second exhaust sub-beam 122 are configured, and each accommodation cavity 131 is exhausted by the respective first exhaust sub-beam 121 and the second exhaust sub-beam 122. In this way, the gas F generated by the thermal runaway of the battery cell module 200 located at the corner of the accommodation space 130 can pass through the first exhaust sub-channel 142 of the first exhaust sub-beam 121 and the second exhaust sub-channel 143 of the second exhaust sub-beam 122 in turn, and be discharged to the outside space of the accommodation cavity 131 after gathering a certain pressure in the second exhaust sub-channel 143. Figure 3 Figure 4 For each accommodation cavity 131 located at the corner of the accommodation space 130, as shown in the V1, V2, V3, V4 area and as shown in the V1, V3, V4, V6 area, the first exhaust sub-beam 121 and the second exhaust sub-beam 122 are configured, and each accommodation cavity 131 is exhausted by the respective first exhaust sub-beam 121 and the second exhaust sub-beam 122. In this way, the gas F generated by the thermal runaway of the battery cell module 200 located at the corner of the accommodation space 130 can pass through the first exhaust sub-channel 142 of the first exhaust sub-beam 121 and the second exhaust sub-channel 143 of the second exhaust sub-beam 122 in turn, and be discharged to the outside space of the accommodation cavity 131 after gathering a certain pressure in the second exhaust sub-channel 143.
[0060] For each accommodation cavity 131 located at the corner of the accommodation space 130, as shown in the V1, V2, V3, V4 area and as shown in the V1, V3, V4, V6 area, the first exhaust sub-beam 121 and the second exhaust sub-beam 122 are configured, and each accommodation cavity 131 is exhausted by the respective first exhaust sub-beam 121 and the second exhaust sub-beam 122. In this way, the gas F generated by the thermal runaway of the battery cell module 200 located at the corner of the accommodation space 130 can pass through the first exhaust sub-channel 142 of the first exhaust sub-beam 121 and the second exhaust sub-channel 143 of the second exhaust sub-beam 122 in turn, and be discharged to the outside space of the accommodation cavity 131 after gathering a certain pressure in the second exhaust sub-channel 143.
[0061] Referring to Figure 4 In other embodiments, each accommodation cavity 131 located at the middle side of the accommodation space 130 can also be collectively configured with the first exhaust sub-beam 121, the second exhaust sub-beam 122 and the third exhaust sub-beam 123, the first exhaust hole of the second exhaust sub-beam 122 is aligned with the third exhaust sub-channel 144 and the second exhaust sub-channel 143 is communicated with the third exhaust sub-channel 144, and the accommodation cavity 131 is exhausted by the first exhaust sub-beam 121, the second exhaust sub-beam 122 and the third exhaust sub-beam 123. For example, referring to Figure 4 The accommodation cavities 131 located at the middle side of the accommodation space 130 are V2 and V5, and the exhaust path of the battery system is as shown in Figure 4 For example, the holding cavity 131 in the V2 region: the thermal runaway gas F of the battery cell module 200 is generated from the tab positions on both sides of the battery cell module 200, and the gas F on one side directly enters the third exhaust sub-channel 144 of the third exhaust sub-beam 123, and is discharged to the outside of the holding cavity 131 after a certain pressure is accumulated in the third exhaust sub-channel 144; the gas F on the other side sequentially passes through the first exhaust sub-channel 142 of the first exhaust sub-beam 121, the second exhaust sub-channel 143 of the second exhaust sub-beam 122, and the third exhaust sub-channel 144 of the third exhaust sub-beam 123, and is discharged to the outside space of the holding cavity 131 after a certain pressure is accumulated in the third exhaust sub-channel 144. The exhaust path of the V5 region is the same as that of the V2 region, and the exhaust paths of the V3, V4, and V6 regions are the same as that of the holding cavity 131 (V1 region) located at the corner of the accommodation space 130. It can be understood that for each holding cavity 131 located on the middle side of the accommodation space 130, the combination structure of the third exhaust sub-beam 123 and the first exhaust sub-beam 121 and the second exhaust sub-beam 122 can be flexibly configured to realize independent exhaust of each independent holding cavity 131.
[0062] Based on the above structure, different exhaust channels 140 are configured for the holding cavities 131 located at different positions of the accommodation space 130, which not only can realize partitioned exhaust and reduce the risk of mutual ignition between modules in the thermal runaway event, but also can realize compact layout of the exhaust channels 140 of each holding cavity 131, effectively utilize the internal space of the box body 100, and improve the integration and overall performance of the box body 100.
[0063] Referring to Figures 2 to 4 In an embodiment, the main body 110 includes a frame 111 and a bottom plate 112 connected to each other, the frame 111 includes a plurality of side beams 1111, and the plurality of side beams 1111 and the bottom plate 112 are fixedly connected and collectively define the accommodation space 130. The second exhaust sub-beam 122 and the third exhaust sub-beam 123 of each holding cavity 131 are respectively arranged close to the corresponding side beam 1111, the side beam 1111 is provided with a fourth exhaust sub-channel 145 facing the outside of the accommodation space 130, and the second exhaust sub-channel 143 and the third exhaust sub-channel 144 of each holding cavity 131 respectively communicate with the fourth exhaust sub-channel 145.
[0064] In the embodiment, the bottom plate 112 is used to support the entire battery system, and the frame 111 includes a plurality of side beams 1111.
[0065] Referring to Figure 3For the accommodating cavities 131 located at the corners of the accommodation space 130, the second exhaust sub-beams 122 of each accommodating cavity 131 are arranged close to the side beams 1111 on the side thereof, and the side beams 1111 are provided with fourth exhaust sub-passages 145 facing the outside of the accommodation space 130, and the second exhaust sub-passages 143 of the second exhaust sub-beams 122 are in communication with the fourth exhaust sub-passages 145. In this way, the gas F generated by the thermal runaway of the battery cell modules 200 located at the corners of the accommodation space 130 can sequentially pass through the first exhaust sub-passages 142 of the first exhaust sub-beams 121, the second exhaust sub-passages 143 of the second exhaust sub-beams 122, and the fourth exhaust sub-passages 145 of the side beams 1111, and be discharged to the outside of the box body 100 after a certain pressure is accumulated in the fourth exhaust sub-passages 145.
[0066] With reference to Figure 4 For the accommodating cavities 131 located at the middle side of the accommodation space 130, the third exhaust sub-beams 123 of each accommodating cavity 131 are arranged close to the side beams 1111 on the side thereof, and the side beams 1111 are provided with fourth exhaust sub-passages 145 facing the outside of the accommodation space 130, and the third exhaust sub-passages 144 of the third exhaust sub-beams 123 are in communication with the fourth exhaust sub-passages 145. In this way, the gas F generated by the thermal runaway of the battery cell modules 200 located at the middle side of the accommodation space 130 can directly sequentially pass through the third exhaust sub-passages 144 of the third exhaust sub-beams 123 and the fourth exhaust sub-passages 145 of the side beams 1111, and be discharged to the outside of the box body 100 after a certain pressure is accumulated in the fourth exhaust sub-passages 145.
[0067] With reference to Figures 1 to 5 In an embodiment, the box body 100 further comprises reinforcing beams 160 arranged on the bottom plate 112, and the second exhaust sub-beams 122 and the third exhaust sub-beams 123 of each accommodating cavity 131 are connected to the side beams 1111 through the corresponding reinforcing beams 160, respectively, and the reinforcing beams 160 are provided with fifth exhaust sub-passages 146 in communication with the fourth exhaust sub-passages 145.
[0068] In the present embodiment, the second exhaust sub-beams 122 and the corresponding side beams 1111 have an assembly distance, and the third exhaust sub-beams 123 and the corresponding side beams 1111 have an assembly distance, and the second exhaust sub-beams 122 and the corresponding side beams 1111 are connected through the reinforcing beams 160, and the third exhaust sub-beams 123 and the corresponding side beams 1111 are connected through the reinforcing beams 160, thereby further strengthening the box body 100.
[0069] In addition, each of the reinforcing beams 160 is provided with a fifth exhaust sub-channel 146, which is in communication with the fourth exhaust sub-channel 145, and the second exhaust sub-channel 143 and the third exhaust sub-channel 144 of each of the accommodating cavities 131 are respectively in communication with the fourth exhaust sub-channel 145. In this way, for the battery cell module 200 located at the corner of the accommodating space 130, the gas F generated by the thermal runaway of the battery cell module 200 can sequentially pass through the first exhaust sub-channel 142 of the first exhaust sub-beam 121, the second exhaust sub-channel 143 of the second exhaust sub-beam 122, the fifth exhaust sub-channel 146 of the reinforcing beam 160, and the fourth exhaust sub-channel 145 of the side beam 1111, and then be discharged to the outside of the box body 100 after a certain pressure is accumulated in the fourth exhaust sub-channel 145. For the battery cell module 200 located at the middle side of the accommodating space 130, the gas F generated by the thermal runaway of the battery cell module 200 can directly sequentially pass through the third exhaust sub-channel 144 of the third exhaust sub-beam 123, the fifth exhaust sub-channel 146 of the reinforcing beam 160, and the fourth exhaust sub-channel 145 of the side beam 1111, and then be discharged to the outside of the box body 100 after a certain pressure is accumulated in the fourth exhaust sub-channel 145.
[0070] With reference to Figures 1 to 5 In an embodiment, the reinforcing beam 160 is provided with a first mounting structure (not shown in the figure) for assembling the induction fire extinguishing device 500, and the side beam 1111 is provided with a second mounting structure (not shown in the figure) corresponding to the position of the fourth exhaust sub-channel 145 for assembling the explosion-proof valve 600.
[0071] In this embodiment, when the high-temperature gas F generated by the thermal runaway of the battery cell module 200 passes through the reinforcing beam 160, the induction fire extinguishing device 500 mounted on the reinforcing beam 160 senses the high temperature and automatically starts the active fire extinguishing action to release the built-in fire extinguishing agent, thereby reducing the temperature and particulate matter of the gas to a certain extent.
[0072] The second mounting structure includes an explosion-proof hole (not shown in the figure) corresponding to the position of the fourth exhaust sub-channel 145 of the side beam 1111, and the explosion-proof valve 600 is used to cover the explosion-proof hole. The explosion-proof valve 600 can play the role of dustproof, waterproof and pressure balance between the inside and outside of the battery system.
[0073] With reference to Figure 3 The exhaust path of the battery system (such as the fourth exhaust sub-channel 145 of the side beam 1111) can be provided with a plurality of explosion-proof valves 600. Figure 3For example, the containing cavity 131 in the V1 area: the thermal runaway gas F of the battery cell module 200 is generated from the tab positions on both sides of the battery cell module 200, enters the first exhaust sub-passage 142 of the two first exhaust sub-beams 121 respectively, and then enters the second exhaust sub-passage 143 of the second exhaust sub-beam 122, the fifth exhaust sub-passage 146 of the reinforcing beam 160, and the fourth exhaust sub-passage 145 of the side beam 1111, and is discharged to the outside of the box body 100 through the explosion-proof valve 600 after gathering a certain pressure in the fourth exhaust sub-passage 145. The exhaust path of the containing cavity 131 in the V2, V3 and V4 areas is the same.
[0074] In this way, each containing cavity 131 is provided with an independent exhaust passage 140, and each independent exhaust passage 140 is provided with the induction fire extinguishing device 500 and the explosion-proof valve 600, so that independent exhaust and automatic fire extinguishing can be realized, the risk of fire outside the box body 100 in a thermal runaway event can be reduced, the risk of toxic gas emission can be reduced, and the safety of partitioned exhaust can be improved.
[0075] In an embodiment, the number of reinforcing beams 160, the number of induction fire extinguishing devices 500, and the number of explosion-proof valves 600 correspond to the number of containing cavities 131. For example, referring to Figure 2 , the number of containing cavities 131 is 4, the number of reinforcing beams 160 is 4, the number of induction fire extinguishing devices 500 is 4, and the number of explosion-proof valves 600 is 4.
[0076] For example, referring to Figure 5 , the utility model provides a battery system, which comprises the box body 100 and a plurality of battery cell modules 200 according to any one of the above embodiments, and the plurality of battery cell modules 200 are accommodated in the plurality of containing cavities 131.
[0077] For example, referring to Figure 6 , in an embodiment, the battery cell module 200 comprises a battery cell 210, a protective layer 220, a foam 230 and a tab bracket 240, the two sides of each battery cell 210 are provided with the protective layer 220 and the foam 230, the tab bracket 240 is arranged at the tab side of the battery cell 210, and the first air inlet hole 141 of the first exhaust sub-beam 121 is arranged towards the tab of the battery cell 210.
[0078] The battery system of the utility model has a plurality of containing cavities 131 in the main body 110, and each containing cavity 131 is not communicated with each other, that is, the containing cavity 131 spaces of each battery cell module 200 are independent of each other, for example, Figure 5There are four accommodating cavities 131 and four battery cell modules 200, and the four battery cell modules 200 are respectively accommodated in the four accommodating cavities 131, so that the partition heat management can be realized; meanwhile, each accommodating cavity 131 is surrounded by at least one exhaust beam 120, the exhaust beam 120 is provided with an exhaust passage 140, and the exhaust passages 140 of the exhaust beams 120 at each accommodating cavity 131 are not communicated, so that each accommodating cavity 131 of each battery cell module 200 is provided with an independent exhaust passage 140, the partition exhaust can be realized, and the risk of mutual ignition between modules in the thermal runaway event is reduced. In addition, the exhaust beam 120 is provided with the exhaust passage 140, so that the structural strength of the main body 110 can be improved, and the independent exhaust space can be provided, and the thermal and electrical separation can be realized.
[0079] Referring to Figures 1 to 3 In an embodiment, the battery system further comprises an induction fire extinguishing device 500 and an explosion-proof valve 600, the induction fire extinguishing device 500 is arranged on the reinforcing beam 160 of the box body 100, and the explosion-proof valve 600 is arranged on the side beam 1111 of the box body 100.
[0080] The reinforcing beam 160 of the box body 100 is provided with a first mounting structure for assembling the induction fire extinguishing device 500, and the induction fire extinguishing device 500 is arranged on the box body 100 through the first mounting structure. The side beam 1111 of the box body 100 is provided with a second mounting structure corresponding to the position of the fourth exhaust sub-passage 145 for assembling the explosion-proof valve 600, and the explosion-proof valve 600 is arranged on the side beam 1111 of the box body 100 through the second mounting structure. In this way, each accommodating cavity 131 is provided with an independent exhaust passage 140, and the induction fire extinguishing device 500 and the explosion-proof valve 600 are arranged in each independent exhaust passage 140, so that the independent exhaust and automatic fire extinguishing can be realized, the risk of fire outside the box body 100 in the thermal runaway event and the risk of toxic gas emission can be reduced, and the safety of the partition exhaust can be improved.
[0081] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation obtained by using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.
Claims
1. A case characterized by comprising: The box body comprises a main body and an exhaust beam; The main body defines a containing space, which comprises a plurality of containing cavities for containing battery cell modules, wherein each containing cavity comprises at least one exhaust beam, the exhaust beam is provided with an exhaust passage, the containing cavity is communicated with the outside of the containing cavity through the exhaust passage, and the containing cavities are not communicated with each other through the exhaust passages of the exhaust beams corresponding to the containing cavities.
2. The case of claim 1, wherein, The exhaust beam comprises a first exhaust sub-beam and a second exhaust sub-beam connected to each other, the first exhaust sub-beam is provided with a first air inlet hole and a first exhaust sub-passage, the second exhaust sub-beam is provided with a second exhaust sub-passage and a first exhaust hole, the first air inlet hole faces the inside of the containing cavity, the second exhaust sub-passage is communicated with the first exhaust sub-passage, the first exhaust hole faces the outside of the containing cavity, and each first exhaust hole faces a different position.
3. The case of claim 2, wherein, The first air inlet hole is arranged to face the tab of the battery cell module.
4. The case of claim 2, wherein, Further comprising a partition beam arranged between two adjacent containing cavities to separate the two adjacent containing cavities.
5. The case of claim 4, wherein, The main body comprises a frame and a bottom plate connected to each other, the frame comprises a plurality of side beams, the plurality of side beams and the bottom plate are fixedly connected to jointly define the containing space, the second exhaust sub-beam of each containing cavity is arranged close to the corresponding side beam, the side beam is provided with a fourth exhaust sub-passage facing the outside of the containing space, and the second exhaust sub-passage of each containing cavity is communicated with the corresponding fourth exhaust sub-passage.
6. The case of claim 5, wherein, Further comprising a reinforcing beam arranged on the bottom plate, the second exhaust sub-beam of each containing cavity is connected to the side beam through the corresponding reinforcing beam, the reinforcing beam is provided with a fifth exhaust sub-passage, and the fifth exhaust sub-passage is communicated with the fourth exhaust sub-passage.
7. The case of claim 6, wherein, The reinforcing beam is provided with a first mounting structure for assembling an induction fire extinguishing device, and the side beam is provided with a second mounting structure for assembling an explosion-proof valve corresponding to the position of the fourth exhaust sub-passage.
8. A box according to any one of claims 4 to 7, characterised in that, The exhaust beam further comprises a third exhaust sub-beam, the third exhaust sub-beam is provided with a second air inlet hole, a third exhaust sub-passage and a second exhaust hole, the second air inlet hole faces the inside of the containing cavity, the second exhaust hole faces the outside of the containing cavity, and the third exhaust sub-passage communicates the second air inlet hole and the second exhaust hole. The containing cavities comprise containing cavities located at the middle side of the containing space and containing cavities located at the corners of the containing space, the containing cavities located at the middle side of the containing space are exhausted through the corresponding third exhaust sub-beam, and the containing cavities located at the corners of the containing space are exhausted through the corresponding first exhaust sub-beam and second exhaust sub-beam.
9. A battery system characterized by, The box body comprises a main body and an exhaust beam; 10. The battery system of claim 9, wherein, Further comprising an induction fire extinguishing device and an explosion-proof valve, the induction fire extinguishing device is arranged on the reinforcing beam of the box body, and the explosion-proof valve is arranged on the side beam of the box body.