Battery pack and electric device
By setting up thermal insulation and thermal conductive components between battery cells, the problem of heat transfer during thermal runaway of battery cells is solved, achieving efficient heat exchange and improved safety, and ensuring the safety and heat dissipation performance of the battery pack.
Patent Information
- Application Number
- CN202520404015.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-07
AI Technical Summary
In existing technologies, when a battery cell experiences thermal runaway, heat can easily be transferred to neighboring cells, leading to heat diffusion. The insulation pad has limited blocking effect and cannot effectively prevent thermal runaway from occurring.
The system employs an isolation component, including a heat insulation element and a heat conduction element. The heat insulation element is placed between adjacent cells to prevent heat transfer, while the heat conduction element is located between the heat insulation element and the liquid cooling plate to quickly transfer heat from the cells to the liquid cooling plate for heat exchange.
It effectively prevents heat transfer between battery cells, reduces the risk of thermal runaway, keeps the battery module within the optimal operating temperature range, and improves the safety and heat dissipation performance of the battery pack.
Smart Images
Figure CN223956662U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to a battery pack and a power utilization device, and belongs to the technical field of new energy batteries. BACKGROUND
[0002] With the diversity of market development, automobile manufacturers and new energy battery companies are seeking different vehicle models.
[0003] In the process of conceiving and implementing the application, the applicant found that at least the following problems exist: when a battery cell experiences thermal runaway, its heat is transferred to adjacent battery cells, so that the adjacent battery cells also experience thermal runaway after absorbing a large amount of heat. In view of this situation, in order to prevent thermal propagation of the battery cells, a thermal insulation pad is usually used between the battery cells to block the transfer of heat. However, the blocking effect of the thermal insulation pad is limited, and when the heat generated by the battery cell experiencing thermal runaway is large, a large amount of heat will still be transferred to the adjacent battery cells through the thermal insulation pad, thereby causing the occurrence of thermal propagation.
[0004] The foregoing statements are intended to provide general background information and do not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL
[0005] The application provides a battery pack and a power utilization device, which can effectively prevent the transfer of heat between multiple battery cells and improve the safety of the battery pack.
[0006] The application provides a battery pack, which comprises:
[0007] a box body having a containing cavity;
[0008] a battery module located in the containing cavity, the battery module having at least two battery cells;
[0009] a liquid cooling plate having a liquid cooling flow channel for the flow of cooling liquid, the liquid cooling plate being used for heat exchange of the battery module;
[0010] an isolation assembly arranged between two adjacent battery cells, the isolation assembly comprising a thermal insulation member and a heat conduction member, the thermal insulation member being arranged on the battery cell, and the heat conduction member being arranged between the thermal insulation member and the liquid cooling plate, the thermal insulation member being used for isolating heat between the two adjacent battery cells, and the heat conduction member being used for transferring heat on the battery cell to the liquid cooling plate.
[0011] The application has the beneficial effects that: through the arrangement of the isolation assembly, the thermal insulation member is arranged between the adjacent battery cells, which can effectively prevent the transfer of heat between multiple battery cells, can prevent the overheating of a certain battery cell from affecting adjacent battery cells, and reduces the risk of thermal runaway; at the same time, the heat conduction member is located between the thermal insulation member and the liquid cooling plate, which can quickly transfer the heat generated by the battery cell to the liquid cooling plate, and then the liquid cooling plate removes the heat through the liquid cooling flow channel inside the liquid cooling plate, realizes efficient heat exchange, keeps the battery module within the optimal working temperature range, and improves the safety of the battery pack.
[0012] In some optional embodiments, the projected area of the thermal insulation member along the arrangement direction of the at least two battery cells is less than or equal to the projected area of the battery cell.
[0013] It should be noted that by limiting the projected area of the thermal insulation member, the space utilization inside the battery pack is optimized. This design ensures that the thermal insulation member provides the necessary thermal isolation function while not occupying too much space, so that more battery cells can be accommodated in the limited space, improving the energy density of the battery pack.
[0014] In some optional embodiments, the thermal insulation member is at least two, including a first thermal insulation member and a second thermal insulation member.
[0015] The first end of the first thermal insulation member is attached to one of the two adjacent battery cells, and the second end of the first thermal insulation member is attached to the first end of the heat conduction member.
[0016] The first end of the second thermal insulation member is attached to the other of the two adjacent battery cells, and the second end of the second thermal insulation member is attached to the second end of the heat conduction member.
[0017] It should be noted that by attaching the first and second thermal insulation members to different sides of adjacent battery cells, this arrangement can more effectively prevent heat transfer between battery cells in the lateral direction, further reducing the risk of thermal runaway and improving the safety of the battery pack.
[0018] In some optional embodiments, the heat conduction member includes a first heat conduction sheet and a second heat conduction sheet connected to each other, the first heat conduction sheet is attached to the thermal insulation member, and the second heat conduction sheet is attached to the liquid cooling plate.
[0019] It should be noted that the first heat conduction sheet is attached to the thermal insulation member, which can quickly absorb the heat generated by the battery cell and transfer the heat to the liquid cooling plate through the second heat conduction sheet connected to it. This design ensures efficient heat conduction and improves the heat dissipation performance of the battery pack.
[0020] In some optional embodiments, the first heat conduction sheet and the second heat conduction sheet have an included angle therebetween.
[0021] It should be noted that by setting an included angle between the first heat conduction sheet and the second heat conduction sheet, heat can be better guided from the battery cell to the liquid cooling plate. The presence of the included angle allows the heat conduction member to adapt to more complex geometric structures and spatial layouts. This flexibility allows better use of space when designing the battery pack, adapting to different shapes and sizes of battery cell arrangements.
[0022] In some optional embodiments, the first heat conduction sheet and the second heat conduction sheet are an integral structure.
[0023] It should be noted that, since the first and second heat-conducting sheets are integrally formed structural members, the interface thermal resistance is eliminated, and heat can be more efficiently transferred from the battery cell to the liquid cooling plate. This seamless connection ensures the continuity of the heat conduction path and improves the overall heat dissipation efficiency.
[0024] In some optional embodiments, the isolation assembly further comprises an insulating member, which is arranged on the second heat-conducting sheet and located between the second heat-conducting sheet and the battery cell.
[0025] It should be noted that the provision of the insulating member provides electrical insulation protection to prevent electrical contact between the battery cell and the heat-conducting sheet. This design effectively avoids the risk of possible short circuit and improves the electrical safety of the battery pack.
[0026] In some optional embodiments, the insulating member covers the second heat-conducting sheet, and the distance between the edge of the insulating member and the edge of the second heat-conducting sheet is greater than or equal to 1 mm.
[0027] It should be noted that the insulating member completely covers the second heat-conducting sheet and leaves a certain distance at the edge. This design ensures that all surfaces of the heat-conducting sheet are covered by the insulating material, further enhancing the electrical insulation effect and preventing any possible electrical short circuit or leakage phenomenon.
[0028] In some optional embodiments, the heat-conducting member is a heat-conducting aluminum plate; and / or,
[0029] The battery pack further comprises a heat-conducting structural adhesive arranged between the battery module and the liquid cooling plate.
[0030] It should be noted that aluminum has high thermal conductivity and can quickly and effectively conduct heat. This enables the heat-conducting aluminum plate to rapidly transfer the heat generated by the battery cell to the liquid cooling plate, thereby improving the heat dissipation efficiency of the battery pack and keeping the battery cell within the optimal operating temperature range.
[0031] In addition, the present application also provides a power utilization device comprising the above-mentioned battery pack.
[0032] The battery pack and the power utilization device provided by the present application, the power utilization device comprising the battery pack; the battery pack comprising: a box body having a receiving cavity; a battery module located in the receiving cavity, the battery module having at least two battery cells; a liquid cooling plate having a liquid cooling channel for the flow of cooling liquid, the liquid cooling plate being used for heat exchange of the battery module; an isolation assembly arranged between adjacent two battery cells, the isolation assembly comprising a heat insulation member and a heat-conducting member, the heat insulation member being arranged on the battery cell, and the heat-conducting member being arranged between the heat insulation member and the liquid cooling plate, the heat insulation member being used for isolating the heat between adjacent two battery cells, and the heat-conducting member being used for transferring the heat on the battery cell to the liquid cooling plate.
[0033] By arranging the isolation assembly, the heat insulation member is arranged between adjacent battery cells, which can effectively prevent heat transfer between the battery cells, prevent the influence of overheating of a certain battery cell on adjacent battery cells, and reduce the risk of thermal runaway. Meanwhile, the heat conduction member is located between the heat insulation member and the liquid cooling plate, which can quickly transfer the heat generated by the battery cell to the liquid cooling plate, and then the liquid cooling plate removes the heat through the liquid cooling channel inside the liquid cooling plate, realizes efficient heat exchange, keeps the battery module in the best working temperature range, and improves the safety of the battery pack. BRIEF DESCRIPTION OF DRAWINGS
[0034] The above and other objects, features and advantages of the embodiments of the present application will become more apparent from the following detailed description thereof taken in conjunction with the accompanying drawings. In the drawings, various embodiments of the present application are illustrated by way of example and not limitation in which:
[0035] Figure 1 is an explosion schematic diagram of the battery pack of the embodiments of the present application;
[0036] Figure 2 is an assembly schematic diagram of the battery module and the isolation assembly in the battery pack of the embodiments of the present application from a first perspective;
[0037] Figure 3 is an assembly schematic diagram of the battery module and the isolation assembly in the battery pack of the embodiments of the present application from a second perspective;
[0038] Figure 4 is a structural schematic diagram of the isolation assembly in the battery pack of the embodiments of the present application;
[0039] Figure 5 is Figure 4 is a local enlarged view of I in FIG. 8;
[0040] Figure 6 is an explosion schematic diagram of the isolation assembly in the battery pack of the embodiments of the present application;
[0041] Figure 7 is a principle schematic diagram of the isolation assembly in the battery pack of the embodiments of the present application.
[0042] REFERENCE SIGNS:
[0043] 100 - battery pack; 110 - box body;
[0044] 120 - battery module; 121 - battery cell;
[0045] 130 - liquid cooling plate;
[0046] 140 - isolation assembly; 141 - heat insulation member; 1411 - first heat insulation member; 1412 - second heat insulation member; 142 - heat conduction member; 1421 - first heat conduction sheet; 1422 - second heat conduction sheet; 143 - insulation member;
[0047] 150 - thermally conductive structural adhesive. DETAILED DESCRIPTION
[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall into the scope of the present application. All other embodiments obtained should fall into the scope of the present application. The embodiments described below and the characteristics in the embodiments can be combined with each other under the condition of no conflict.
[0049] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless specifically defined otherwise. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0050] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0051] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, a person of ordinary skill in the art can combine and combine the different embodiments or examples described in the specification and the characteristics of the different embodiments or examples without contradiction.
[0052] During the conception and implementation of the present application, the applicant has found that at least the following problem exists: when a battery cell is in thermal runaway, its heat is transferred to the adjacent battery cell, so that the adjacent battery cell also enters thermal runaway after absorbing a large amount of heat. In view of this situation, in order to prevent the occurrence of thermal propagation of the battery cell, a thermal insulation pad is usually used between the battery cells to block the heat transfer. However, the blocking effect of the thermal insulation pad is limited, and when the heat generated by the battery cell in thermal runaway is large, a large amount of heat will still be transferred to the adjacent battery cell through the thermal insulation pad, thereby causing the occurrence of thermal propagation.
[0053] The battery pack provided by the present application can effectively prevent the heat transfer between the plurality of battery cells by arranging the isolation assembly and the heat insulation member between the adjacent battery cells, can prevent the adjacent battery cell from being affected when a certain battery cell overheats, and reduces the risk of thermal runaway. Meanwhile, the heat conduction member is located between the heat insulation member and the liquid cooling plate, can quickly transfer the heat generated by the battery cell to the liquid cooling plate, and then the liquid cooling plate removes the heat through the liquid cooling flow channel inside the liquid cooling plate, realizes efficient heat exchange, keeps the battery module in the optimal working temperature range, and improves the safety of the battery pack.
[0054] The battery pack provided by the present application will be described in detail below in combination with specific embodiments.
[0055] Figure 1 An exploded view of the battery pack of the embodiment of the present application is shown in Figure 2 An assembly view of the battery module and the isolation assembly in the battery pack of the embodiment of the present application is shown in a first perspective, Figure 3 An assembly view of the battery module and the isolation assembly in the battery pack of the embodiment of the present application is shown in a second perspective, Figure 4 A structure view of the isolation assembly in the battery pack of the embodiment of the present application is shown in Figure 5 A structure view of the isolation assembly in the battery pack of the embodiment of the present application is shown in Figure 4 A local enlarged view of I in the structure view of the isolation assembly in the battery pack of the embodiment of the present application is shown in Figure 6 An exploded view of the isolation assembly in the battery pack of the embodiment of the present application is shown in Figure 7 A principle view of the isolation assembly in the battery pack of the embodiment of the present application is shown in
[0056] As shown in Figures 1 to 7 The embodiment of the present application provides a battery pack 100, which comprises:
[0057] A box body 110 having a containing cavity;
[0058] A battery module 120 located in the containing cavity, the battery module 120 having at least two battery cells 121;
[0059] A liquid cooling plate 130 having a liquid cooling flow channel for the cooling liquid to flow, the liquid cooling plate 130 being used for heat exchange of the battery module 120;
[0060] An isolation assembly 140 is disposed between two adjacent battery cells 121. The isolation assembly 140 includes a heat insulation component 141 and a heat conduction component 142. The heat insulation component 141 is disposed between the battery cell 121 and the heat conduction component 142 is disposed between the heat insulation component 141 and the liquid cooling plate 130. The heat insulation component 141 is used to isolate the heat between the two adjacent battery cells 121, and the heat conduction component 142 is used to transfer the heat on the battery cell 121 to the liquid cooling plate 130.
[0061] It is understandable that the purpose of the receiving cavity is to house the battery module 120. It is also easy to understand that the receiving cavity is sealed to prevent side reactions from occurring inside the battery cell 121 in the battery module 120, which would affect the performance of the battery cell 121.
[0062] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery module 120. Specifically, it can be adjusted according to the actual situation. This application embodiment does not impose too many restrictions here.
[0063] In this embodiment, the battery module 120 can be configured as a rectangular structure. The battery module 120 can be located inside the housing 110.
[0064] Understandably, the housing 110 can be used to support the battery module 120.
[0065] The dimensions of the aforementioned housing 110 can be set according to actual needs, and this embodiment of the application does not impose any restrictions on them.
[0066] In addition, it should be noted that the shape of the box 110 is not limited in this embodiment. For example, the box 110 can be a regular shape such as a cuboid or a cylinder. Of course, the box 110 can also be other irregular shapes.
[0067] In one possible implementation, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the battery module 120, so that the housing 110 can support the battery module 120.
[0068] In some embodiments, the liquid cooling plate 130 can be a profile liquid cooling plate 130. The structural design of the profile liquid cooling plate 130 can provide additional mechanical strength and rigidity, enhance the structural stability of the entire battery box, and reduce deformation or damage caused by vibration or impact.
[0069] Specifically, the bottom of the liquid cooling plate 130 contains the cavity required for the flow channel of the liquid cooling plate 130, and the side integrally extruded to form a frame structure, that is, its left side is integrally extruded to form the left frame, and its right side is integrally extruded to form the right frame. The bottom material of the side structure is relatively thick, which ensures the strength of the frame structure. At the same time, the integral extrusion structure improves the overall strength and modality, reduces the cost of manual welding, and reduces the amount of welding deformation.
[0070] In some embodiments, the liquid cooling plate 130 can be a stamped liquid cooling plate 130, which is spliced by aluminum plate brazing. In order to realize lightweight, the upper and lower plate materials are made of lighter and thinner materials, and meanwhile, the liquid cooling plate 130 has higher heat management performance. In addition, the water nozzle is external, which is convenient for installation and reduces the configuration of joints and hoses in the box.
[0071] Specifically, if the liquid cooling plate 130 is a stamped liquid cooling plate 130, the box body 110 includes a bottom guard plate to support the liquid cooling plate 130 and improve the strength.
[0072] It should be noted that the battery pack 100 provided by the embodiments of the present application further includes a separation assembly 140 located between the adjacent two battery cells 121, wherein the separation assembly 140 includes a heat insulation piece 141 for isolating the heat between the adjacent two battery cells 121, that is, after the heat on one of the adjacent two battery cells 121 is isolated by the heat insulation piece, a smaller amount of heat is transferred to the other of the adjacent two battery cells 121.
[0073] In some embodiments, the heat insulation piece 141 can be a heat insulation pad, which has heat insulation and insulation properties, and has a thermal conductivity coefficient ≤0.06 w / (m.K). At the same time, the heat insulation pad also has a certain compression performance for absorbing the expansion amount of the battery cell 121.
[0074] In some embodiments, the separation assembly 140 further includes a heat conduction piece 142 for transferring the heat on the battery cell 121 to the liquid cooling plate 130. It can be understood here that the heat required to be conducted by the heat conduction piece 142 can include the heat of the battery cell 121, or can also include the heat transferred to the heat insulation piece by the battery cell 121, or both.
[0075] Through the above setting, that is, through the setting of the separation assembly 140, the heat insulation piece 141 is arranged between the adjacent battery cells 121, which can effectively prevent the heat transfer between the plurality of battery cells 121, and can prevent the overheating of a certain battery cell 121 from affecting the adjacent battery cells 121, thereby reducing the risk of thermal runaway. At the same time, the heat conduction piece 142 is located between the heat insulation piece 141 and the liquid cooling plate 130, which can quickly transfer the heat generated by the battery cell 121 to the liquid cooling plate 130, and then the liquid cooling plate 130 removes the heat through the liquid cooling flow channel inside the liquid cooling plate 130, thereby realizing efficient heat exchange, keeping the battery module 120 within the optimal working temperature range, and improving the safety of the battery pack 100.
[0076] In some optional embodiments, the projection area of the heat insulation piece 141 is less than or equal to the projection area of the battery cell 121 along the arrangement direction of the at least two battery cells 121.
[0077] It should be noted that by limiting the projected area of the thermal insulation 141, the space utilization inside the battery pack 100 is optimized. This design ensures that the thermal insulation 141 provides the necessary thermal isolation function without occupying too much space, so that more battery cells 121 can be accommodated in the limited space, improving the energy density of the battery pack 100.
[0078] Although the projected area of the thermal insulation 141 is small, it can still effectively isolate the heat transfer between adjacent battery cells 121 and maintain good thermal management performance.
[0079] In addition, due to the optimized size of the thermal insulation 141, this design can more easily adapt to different sizes and shapes of battery cell 121 arrangements, enhancing the flexibility and compatibility of the battery pack 100 design.
[0080] It should be noted that the arrangement direction of the at least two battery cells 121 is X.
[0081] In some optional embodiments, the thermal insulation 141 is at least two, and the at least two thermal insulations 141 include a first thermal insulation 1411 and a second thermal insulation 1412.
[0082] The first end of the first thermal insulation 1411 is attached to one of the two adjacent battery cells 121, and the second end of the first thermal insulation 1411 is attached to the first end of the heat conduction member 142.
[0083] The first end of the second thermal insulation 1412 is attached to the other of the two adjacent battery cells 121, and the second end of the second thermal insulation 1412 is attached to the second end of the heat conduction member 142.
[0084] It should be noted that by attaching the first thermal insulation 1411 and the second thermal insulation 1412 to different sides of adjacent battery cells 121, this arrangement can more effectively prevent heat transfer laterally between battery cells 121, further reducing the risk of thermal runaway and improving the safety of the battery pack 100.
[0085] In addition, as Figure 7 shown, the heat decreases from left to right, for example, the heat of the left battery cell 121 is isolated by the first thermal insulation 1411, at this time, part of the heat is transferred to the liquid cooling plate 130 through the heat conduction member 142, and another part of the heat is isolated again by the second thermal insulation 1412, so that less heat enters the right battery cell 121.
[0086] The design of the thermal insulation 141 allows heat to be transferred from the battery cell 121 to the liquid cooling plate 130 through the heat conduction member 142, rather than between the battery cells 121. This ensures that the heat is quickly taken away, maintaining the optimal operating temperature of the battery cell 121 and improving the heat dissipation efficiency.
[0087] Specifically, by attaching the two ends of the thermal insulation piece 141 to the battery cell 121 and the heat conducting piece 142 respectively, a stable structure is formed.
[0088] In some embodiments, the use of multiple thermal insulation pieces 141 can be flexibly adjusted according to the arrangement and size of the battery cell 121 to adapt to different design requirements of the battery module 120.
[0089] In some optional embodiments, the heat conducting piece 142 includes a first heat conducting sheet 1421 and a second heat conducting sheet 1422 connected to each other, the first heat conducting sheet 1421 is attached to the thermal insulation piece 141, and the second heat conducting sheet 1422 is attached to the liquid cooling plate 130.
[0090] It should be noted that the first heat conducting sheet 1421 is attached to the thermal insulation piece 141, which can quickly absorb the heat generated by the battery cell 121 and transfer the heat to the liquid cooling plate 130 through the second heat conducting sheet 1422 connected thereto. Such design ensures efficient heat conduction and improves the heat dissipation performance of the battery pack 100.
[0091] Through the combination of the first heat conducting sheet 1421 and the second heat conducting sheet 1422, heat can be distributed and conducted over a larger area, reducing the risk of local overheating.
[0092] In some embodiments, the design of the first heat conducting sheet 1421 and the second heat conducting sheet 1422 allows the selection of different materials to optimize heat conduction efficiency and cost. For example, the first heat conducting sheet 1421 can be selected to be a high-thermal-conductivity material to quickly absorb heat, while the second heat conducting sheet 1422 can be selected to be a material more suitable for combination with the liquid cooling plate 130.
[0093] In some optional embodiments, the first heat conducting sheet 1421 and the second heat conducting sheet 1422 have an included angle therebetween.
[0094] It should be noted that by setting an included angle between the first heat conducting sheet 1421 and the second heat conducting sheet 1422, heat can be better guided from the battery cell 121 to the liquid cooling plate 130. The presence of the included angle enables the heat conducting piece 142 to adapt to more complex geometric structures and spatial layouts. This flexibility allows better utilization of space when designing the battery pack 100, adapting to different shapes and sizes of battery cell 121 arrangements.
[0095] In some embodiments, the first heat conducting sheet 1421 and the second heat conducting sheet 1422 are perpendicular to each other.
[0096] In some embodiments, the first heat conducting sheet 1421 and the second heat conducting sheet 1422 can form an L shape or a T shape.
[0097] In some optional embodiments, the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422 are an integrally formed structure.
[0098] It should be noted that, since the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422 are an integrally formed structure, the interface thermal resistance is eliminated, and heat can be more efficiently transferred from the battery cell 121 to the liquid cooling plate 130. This seamless connection ensures the continuity of the heat conduction path and improves the overall heat dissipation efficiency.
[0099] It should be noted that, by setting the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422 as an integrally formed structure, not only can the connection strength between the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422 be improved, but also a seamless connection between the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422 can be achieved, thereby reducing the risk of cracking at the connection position between the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422.
[0100] The integrally formed structure can be produced through a single manufacturing process such as die casting, injection molding or stamping, simplifying the manufacturing process and reducing production costs. At the same time, this also reduces the assembly steps and improves production efficiency.
[0101] In some optional embodiments, the isolation assembly 140 further comprises an insulating piece 143, which is arranged on the second heat-conducting sheet 1422 and located between the second heat-conducting sheet 1422 and the battery cell 121.
[0102] It should be noted that the arrangement of the insulating piece 143 provides electrical insulation protection to prevent electrical contact between the battery cell 121 and the heat-conducting sheet. This design effectively avoids the risk of possible short circuit and improves the electrical safety of the battery pack 100.
[0103] In addition, the insulating piece 143 can also provide a certain mechanical cushioning to absorb stress caused by thermal expansion or vibration. This cushioning helps to protect the battery cell 121 and the heat-conducting sheet and reduces the risk of mechanical damage.
[0104] In some embodiments, when the first heat-conducting sheet 1421 and the second heat-conducting sheet 1422 form a T shape, the insulating piece 143 is two, and the two insulating pieces 143 are respectively located on both sides of the first heat-conducting sheet 1421.
[0105] In some optional embodiments, the insulating piece 143 covers the second heat-conducting sheet 1422, and the distance between the edge of the insulating piece 143 and the edge of the second heat-conducting sheet 1422 is greater than or equal to 1 mm.
[0106] It should be noted that the insulating piece 143 completely covers the second heat-conducting sheet 1422 and leaves a certain distance at the edge. This design ensures that all surfaces of the heat-conducting sheet are covered by the insulating material, further enhancing the electrical insulation effect and preventing any possible electrical short circuit or leakage phenomenon.
[0107] In addition, the distance design of the edge also provides a certain tolerance space for manufacturing and assembly, reducing the risk of insulation failure due to manufacturing errors or improper assembly. This design improves the reliability and yield of the production process.
[0108] By ensuring the overall coverage of the insulating piece 143 and the edge distance, the design further enhances the overall safety of the battery pack 100, especially in high-voltage and high-temperature environments, effectively preventing electrical and thermal failures.
[0109] In some optional embodiments, the heat-conducting piece 142 is a heat-conducting aluminum plate; and / or,
[0110] The battery pack 100 also includes a heat-conducting structural adhesive 150, which is arranged between the battery module 120 and the liquid cooling plate 130.
[0111] It should be noted that aluminum has high thermal conductivity, which can quickly and effectively conduct heat. This allows the heat-conducting aluminum plate to quickly transfer the heat generated by the battery cell 121 to the liquid cooling plate 130, thereby improving the heat dissipation efficiency of the battery pack 100 and keeping the battery cell 121 within the optimal operating temperature range.
[0112] Due to the low density of aluminum, compared to other metal materials, the heat-conducting aluminum plate can provide good thermal conductivity while maintaining a relatively light weight.
[0113] In addition, the aluminum plate has good mechanical strength and toughness, which can provide the necessary structural support in the battery pack 100 and enhance the overall mechanical stability and durability.
[0114] It should be noted that the heat-conducting structural adhesive 150 not only provides thermal conduction function, but also has certain bonding strength, which can provide mechanical fixation between the battery module 120 and the liquid cooling plate 130. This fixation helps to maintain the stability of the components under vibration or impact conditions.
[0115] The heat-conducting structural adhesive 150 has good thermal conductivity, which can effectively fill the gap between the battery module 120 and the liquid cooling plate 130, reducing the interface thermal resistance. The heat-conducting structural adhesive 150 can fill the small irregularities or gaps between the battery module 120 and the liquid cooling plate 130, providing a larger contact area.
[0116] The battery pack provided by the embodiment of the application comprises a box body having a containing cavity; a battery module located in the containing cavity, the battery module having at least two battery cells; a liquid cooling plate having a liquid cooling channel for cooling liquid to flow, the liquid cooling plate being used for heat exchange of the battery module; and an isolation assembly arranged between the adjacent two battery cells, the isolation assembly comprising a heat insulation member and a heat conduction member, the heat insulation member being arranged at the battery cell, and the heat conduction member being arranged between the heat insulation member and the liquid cooling plate, the heat insulation member being used for isolating heat between the adjacent two battery cells, and the heat conduction member being used for transferring heat on the battery cell to the liquid cooling plate.
[0117] By arranging the isolation assembly, the heat insulation member is arranged between the adjacent battery cells, which can effectively prevent heat transfer between the plurality of battery cells, can prevent the adjacent battery cells from being affected when a certain battery cell overheats, and reduces the risk of thermal runaway. Meanwhile, the heat conduction member is located between the heat insulation member and the liquid cooling plate, which can quickly transfer the heat generated by the battery cell to the liquid cooling plate, and then the liquid cooling plate removes the heat through the liquid cooling channel inside the liquid cooling plate, realizes efficient heat exchange, keeps the battery module in the optimal working temperature range, and improves the safety of the battery pack.
[0118] In addition, the embodiment of the application further provides a power consumption device comprising the battery pack 100.
[0119] It should be noted that the specific structure of the battery pack 100 is not limited here, and can be referred to the above.
[0120] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply 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.
[0121] In addition, the terms “first” and “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “plurality” is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0122] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A battery pack (100), characterized by, The battery pack (100) comprises: a box body (110) having a containing cavity; a battery module (120) located in the containing cavity, the battery module (120) having at least two battery cells (121); a liquid cooling plate (130) having a liquid cooling flow channel for cooling liquid to flow, the liquid cooling plate (130) being used for heat exchange of the battery module (120); an isolation assembly (140) arranged between two adjacent battery cells (121), the isolation assembly (140) comprising a heat insulation member (141) and a heat conduction member (142), the heat insulation member (141) being arranged on the battery cell (121), the heat conduction member (142) being arranged between the heat insulation member (141) and the liquid cooling plate (130), the heat insulation member (141) being used for isolating heat between two adjacent battery cells (121), and the heat conduction member (142) being used for transferring heat on the battery cell (121) to the liquid cooling plate (130).
2. The battery pack (100) according to claim 1, characterized in that, The projection area of the heat insulation member (141) is less than or equal to the projection area of the battery cell (121) along the arrangement direction of the at least two battery cells (121).
3. The battery pack (100) according to claim 2, characterized in that, The heat insulation member (141) is at least two, and the at least two heat insulation members (141) comprise a first heat insulation member (1411) (141) and a second heat insulation member (1412) (141). A first end of the first heat insulation member (1411) (141) is attached to one of the two adjacent battery cells (121), and a second end of the first heat insulation member (1411) (141) is attached to a first end of the heat conduction member (142). A first end of the second heat insulation member (1412) (141) is attached to the other of the two adjacent battery cells (121), and a second end of the second heat insulation member (1412) (141) is attached to a second end of the heat conduction member (142).
4. The battery pack (100) according to any one of claims 1-3, characterized in that, The heat conduction member (142) comprises a first heat conduction sheet (1421) and a second heat conduction sheet (1422) connected to each other, the first heat conduction sheet (1421) being attached to the heat insulation member (141), and the second heat conduction sheet (1422) being attached to the liquid cooling plate (130).
5. The battery pack (100) according to claim 4, characterized in that An included angle is formed between the first heat conduction sheet (1421) and the second heat conduction sheet (1422).
6. The battery pack (100) of claim 4, wherein, The first heat conduction sheet (1421) and the second heat conduction sheet (1422) are an integral structure.
7. The battery pack (100) of claim 5, wherein, The isolation assembly (140) further comprises an insulation member (143) arranged on the second heat conduction sheet (1422) and located between the second heat conduction sheet (1422) and the battery cell (121).
8. The battery pack (100) according to claim 7, characterized in that The insulation member (143) covers the second heat conduction sheet (1422), and a distance between an edge of the insulation member (143) and an edge of the second heat conduction sheet (1422) is greater than or equal to 1 mm.
9. The battery pack (100) according to any one of claims 1-3, characterized in that, The heat conduction member (142) is a heat conduction aluminum plate; and / or The battery pack (100) further comprises a heat conduction structural adhesive (150) arranged between the battery module (120) and the liquid cooling plate (130).
10. An electrical device, characterized by The battery pack (100) of any one of claims 1 to 9.