Battery pack and electric device comprising same

Abstract

A battery pack (1000) and an electric device (2000) comprising same. An accommodating cavity (110) is formed in a case of the battery pack; the accommodating cavity has first cavity walls (111) arranged opposite to each other and is internally provided with at least two of battery modules (200); a first heat insulation structure (300) is sealingly connected to the two first cavity walls and comprises a first heat insulation member (310) and a second heat insulation member (320); the first heat insulating member partitions the space between two adjacent battery modules into two first discharge channels (510); the two first discharge channels are respectively in communication with pressure relief structures (211) of corresponding battery cells (210); and at least one end of the first heat insulation member is provided with the second heat insulation member sandwiched between the first cavity wall and the battery modules.

Description

Battery pack and electric device having the same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] The present disclosure is based on the Chinese patent application “Battery Pack and Electrical Device Having the Same” with application number 202410399882.7 and application date April 1, 2024, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into the present disclosure as a reference. Technical Field

[0003] The present disclosure belongs to the field of battery technology, and in particular relates to a battery pack and an electrical device having the same. Background Art

[0004] As an important component of electrical devices, the safety performance of battery packs is extremely important.

[0005] In the prior art, in order to avoid thermal runaway of the battery pack and reduce the safety of the battery pack, a pressure relief structure is usually set on the battery cell. During the use of the battery pack, if the internal air pressure of the battery cell increases to a certain level, the pressure relief structure can be controlled to open. At this time, the flame, smoke or gas inside the battery cell can be discharged through the pressure relief structure to achieve the purpose of pressure relief.

[0006] However, when the battery cells in the existing battery pack release pressure, they are likely to affect the adjacent battery groups, thereby causing the adjacent battery groups to also suffer from chain reaction outages, thereby reducing the safety of the battery pack. Summary of the Invention

[0007] To this end, the present disclosure proposes a battery pack that prevents adjacent battery groups from affecting each other during pressure relief while simplifying the structure of the battery pack, thereby solving the technical problem in the prior art that battery cells in a battery pack easily affect adjacent battery groups during pressure relief.

[0008] According to an embodiment of the present disclosure, a battery pack includes: a shell, wherein at least one accommodating cavity is formed within the shell, and the accommodating cavity has two first cavity walls arranged opposite to each other along a first direction; a battery pack, wherein at least one of the accommodating cavity is provided with at least two battery packs spaced apart along a second direction, each battery pack including a plurality of battery cells, and the first direction intersects with the second direction; a first thermal insulation structure, wherein both ends of the first thermal insulation structure in the first direction are respectively sealedly connected to the two first cavity walls, and the first thermal insulation structure includes a connected first thermal insulation member and a second thermal insulation member, the first thermal insulation member is spaced between two adjacent battery packs to separate the space between the two adjacent battery packs into a first exhaust channel and a second exhaust channel, the first exhaust channel is connected to the pressure relief structure of at least one battery cell of one of the two adjacent battery packs, and the second exhaust channel is connected to the pressure relief structure of at least one battery cell of the other of the two adjacent battery packs, at least one second thermal insulation member is provided at at least one end of the first thermal insulation member in the first direction, and the second thermal insulation member is sandwiched between the first cavity wall and the battery pack adhesively fixed to the first cavity wall by an adhesive member.

[0009] According to the battery pack of the embodiment of the present disclosure, a first thermal insulation structure is provided, and the first thermal insulation member of the first thermal insulation structure is used to separate the space between two adjacent battery groups into a first discharge channel and a second discharge channel. In this way, the two adjacent battery groups can release pressure separately through the first discharge channel and the second discharge channel respectively when the pressure is released, so as to avoid, to a certain extent, the influence of one battery group on the other adjacent battery group when the pressure is released, thereby avoiding the chain runaway of multiple battery groups when the pressure is released and the heat is released, thereby improving the safety of the battery pack. At the same time, at least one second thermal insulation member is provided at at least one end of the two ends of the first thermal insulation member in the first direction, and the second thermal insulation member is clamped between the first cavity wall and the battery group glued to the first cavity wall by the adhesive member. While facilitating the use of the second thermal insulation member to achieve a sealed connection between the first thermal insulation member and the first cavity wall, the second thermal insulation member can also be used to limit the bonding thickness between the first cavity wall and the battery group, so as to ensure the fixed connection between the first cavity wall and the battery group, and improve the connection strength between the first cavity wall and the battery group, thereby making the battery pack structure stable. That is to say, the battery pack disclosed herein can not only release pressure, but also avoid mutual influence between adjacent battery packs during the pressure release process. At the same time, it can also simplify the structure of the battery pack and ensure a fixed connection between the first cavity wall and the battery pack.

[0010] Optionally, the second thermal insulation member is provided at one of the two ends of the first thermal insulation member in the first direction, and the ends of the first thermal insulation member and the second thermal insulation member that are away from each other are respectively sealed and connected to the corresponding first cavity wall.

[0011] Optionally, one end of the first thermal insulation member away from the second thermal insulation member is inserted into a slot corresponding to the first cavity wall.

[0012] Optionally, two second thermal insulation members are provided at one end of the first thermal insulation member in the first direction, and the two second thermal insulation members are respectively located on both sides of the first thermal insulation member in the second direction.

[0013] Optionally, the second thermal insulation member is connected to the corresponding battery pack.

[0014] Optionally, in the second direction, the overlap length L between the second thermal insulation component and the battery pack is greater than 10 mm.

[0015] Optionally, the first thermal insulation member is formed into a plate-like structure, and the thickness t of the first thermal insulation member is ≥1 mm; and / or the second thermal insulation member is formed into a plate-like structure, and the thickness T of the second thermal insulation member is ≥1 mm.

[0016] Optionally, at least one of the two adjacent battery groups is bonded to at least one of the two first cavity walls; and / or the first thermal insulation structure is bonded to at least one of the two first cavity walls.

[0017] Optionally, all the pressure relief structures of at least one group of the battery packs are respectively arranged on both sides of the battery pack in the second direction, and the accommodating cavity also has two second cavity walls arranged opposite to each other along the second direction. The battery pack and the second cavity walls are spaced apart so that a third discharge channel is provided between the battery pack and the second cavity wall, and the third discharge channel is connected to part of the pressure relief structures of the battery pack adjacent to the second cavity wall.

[0018] Optionally, the battery pack adjacent to the second cavity wall is sealed and connected to the two first cavity walls respectively; and / or, the battery pack further includes a second thermal insulation structure, at least a portion of which is arranged between the battery pack and the second cavity wall and separates the space between the battery pack and the second cavity wall into the third discharge channel.

[0019] Optionally, the accommodating cavity further has two third cavity walls arranged opposite to each other along a third direction, and a fourth discharge channel is formed in at least one of the third cavity walls. At least one of the first discharge channel, the second discharge channel and the third discharge channel is connected to the fourth discharge channel, and the first direction and the second direction are respectively perpendicular to the third direction.

[0020] Optionally, the battery pack further includes a second thermal insulation structure, which is sealed and connected to at least one of the two first cavity walls, so that at least one of the two first cavity walls participates in defining the third exhaust channel.

[0021] Optionally, the second thermal insulation structure includes a third thermal insulation component, and the third thermal insulation component is fixed on the second cavity wall and is sealed and connected to the two first cavity walls respectively.

[0022] Optionally, the pressure relief structures of two adjacent electrically connected battery cells of at least one group of the battery packs are respectively arranged on both sides of the battery pack in the second direction, and the poles of two adjacent electrically connected battery cells of at least one group of the battery packs are respectively arranged on both sides of the battery pack in the second direction.

[0023] Optionally, the battery pack includes multiple rows of battery rows sequentially arranged along the first direction, each row of the battery rows includes multiple battery cells sequentially arranged along a third direction, and the first direction and the second direction are respectively perpendicular to the third direction.

[0024] Optionally, the battery cell is a cylindrical battery, and the axial direction of the cylindrical battery is parallel to the second direction.

[0025] Optionally, the battery cells of two adjacent rows of the battery rows are staggered one by one in the third direction.

[0026] Optionally, the battery pack further includes a mounting bracket, and the mounting bracket is provided on at least one of the two sides of the multiple rows of battery rows in the first direction, the mounting bracket is sealed with the corresponding first cavity wall, and a plurality of mounting grooves arranged in sequence along the third direction are formed on the side of the mounting bracket facing the battery row, and the plurality of battery cells of the battery row are respectively limited and fitted in the corresponding mounting grooves.

[0027] Optionally, the mounting brackets are respectively provided on both sides of the multiple rows of battery rows in the first direction, and the mounting brackets on both sides of the multiple rows of battery rows in the first direction are fixedly connected.

[0028] Optionally, the battery pack further includes a heat exchange component, which is disposed between two adjacent rows of battery cells and exchanges heat with the two adjacent rows of battery cells.

[0029] Optionally, the heat exchange element is fixedly connected to each of the battery cells in two adjacent rows of the battery rows.

[0030] Optionally, the battery cells are cylindrical batteries, the axial direction of the cylindrical batteries is parallel to the second direction, the battery cells of two adjacent rows of battery rows are staggered one by one in the third direction, the heat exchanger includes a plurality of first protrusions and a plurality of second protrusions, the plurality of first protrusions and the plurality of second protrusions are alternately arranged one by one along the third direction, the first protrusions protrude toward one of the two adjacent rows of battery rows, and the second protrusions protrude toward the other row of the two adjacent rows of battery rows.

[0031] An electric device according to an embodiment of the present disclosure includes the aforementioned battery pack.

[0032] According to the electric device of the embodiment of the present disclosure, the safety of use of the electric device is improved by adopting the aforementioned battery pack.

[0033] Additional aspects and advantages of the present disclosure will become apparent from the following description or may be learned by practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] FIG1 is an exploded view of a battery pack according to some embodiments of the present disclosure.

[0036] FIG2 is a top view of a battery pack according to some embodiments of the present disclosure with some structures omitted.

[0037] FIG3 is a cross-sectional view along line AA of FIG2 .

[0038] FIG4 is a partial enlarged view of area I in FIG3 .

[0039] FIG5 is a partial enlarged view of area II in FIG3 .

[0040] FIG6 is an exploded view of a battery pack without the outer shell according to some embodiments of the present disclosure.

[0041] FIG. 7 is an exploded view of a battery pack and a mounting bracket according to some embodiments of the present disclosure.

[0042] FIG8 is a partial enlarged view of two adjacent rows of batteries in some embodiments of the present disclosure when they are matched.

[0043] FIG9 is a schematic diagram of an electrical device according to some embodiments of the present disclosure.

[0044] Reference numerals: 1000, battery pack; 100, housing; 110, receiving cavity; 111, first cavity wall; 1111, slot; 112, second cavity wall; 113, third cavity wall; 120, base; 130, upper cover; 140, guard plate; 200, battery pack; 210, battery cell; 211, pressure relief structure; 220, battery row; 600, mounting bracket; 610, mounting slot; 300, first thermal insulation structure; 310, first thermal insulation member; 32 0. Second thermal insulation member; 400. Second thermal insulation structure; 410. Third thermal insulation member; 510. First discharge channel; 520. Second discharge channel; 530. Third discharge channel; 700. Heat exchange member; 710. First protrusion; 720. Second protrusion; 730. Conveying member; 810. First connecting member; 820. Second connecting member; 830. Third connecting member; 840. Sealing member; 900. Battery management system; 2000. Electrical device. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0046] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0047] The battery pack 1000 according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0048] 1 and 2 , a battery pack 1000 according to an embodiment of the present disclosure includes: a housing 100 , a battery pack 200 , and a first thermal insulation structure 300 .

[0049] 2 , 3 , and 4 , at least one accommodating cavity 110 is formed in the housing 100. The accommodating cavity 110 has two first cavity walls 111 disposed opposite to each other in a first direction. This means that one or more accommodating cavities 110 are formed in the housing 100. Each accommodating cavity 110 has two first cavity walls 111 disposed opposite to each other in the first direction.

[0050] It should be noted that the first direction mentioned here can be understood as the X direction shown in FIG. 1 , that is, the accommodating cavity 110 has two first cavity walls 111 arranged opposite to each other along the X direction.

[0051] In a specific example, the X direction is the up-down direction of the battery pack 1000 , and the two first cavity walls 111 opposite to each other along the X direction are respectively formed as the upper side wall and the lower side wall of the accommodating cavity 110 .

[0052] In the description of the present disclosure, unless otherwise specified, “plurality” means two or more.

[0053] As shown in Figures 1, 2, and 3, at least one accommodating cavity 110 is provided with at least two battery packs 200 spaced apart along the second direction, each battery pack 200 including a plurality of battery cells 210, and the first direction intersects the second direction. This means that at least two battery packs 200 are provided within at least one accommodating cavity 110 within the housing 100, and the at least two battery packs 200 are spaced apart along the second direction of the housing 100 to achieve rational utilization of the space within the accommodating cavity 110, ensuring that at least two battery packs 200 can be simultaneously provided within the same accommodating cavity 110, and each battery pack 200 is configured to include a plurality of battery cells 210 to ensure the number of battery cells 210 within the accommodating cavity 110, thereby ensuring the capacity of the battery pack 1000.

[0054] It should be noted that the second direction mentioned here can be understood as the Y direction shown in FIG. 1 .

[0055] In a specific example, the Y direction is the left-right direction of the battery pack 1000 .

[0056] At the same time, through the above-mentioned arrangement, the battery pack 200 can be placed inside the outer shell 100, so that the outer shell 100 can be used to protect the battery pack 200, improve the reliability of the battery pack 200, and extend the service life of the battery pack 200. At the same time, the outer shell 100 can also be used to support the battery pack 200, to ensure the position stability of the battery pack 200 to a certain extent, which is conducive to ensuring the working performance of the battery pack 200.

[0057] In some embodiments, one end of the accommodating cavity 110 is open, so that the battery pack 200 can be placed in the accommodating cavity 110 using the opening, reducing the difficulty of assembling the battery pack 200, thereby facilitating the use of the outer shell 100 to support and protect the battery pack 200.

[0058] As shown in Figures 3 and 4, the first thermal insulation structure 300 is sealed and connected to the two first cavity walls 111 at both ends in the first direction, and the first thermal insulation structure 300 includes a connected first thermal insulation member 310 and a second thermal insulation member 320. The first thermal insulation member 310 is spaced between two adjacent battery groups 200 to separate the space between the two adjacent battery groups 200 into a first discharge channel 510 and a second discharge channel 520. The first discharge channel 510 is connected to the pressure relief structure 211 of at least one battery cell 210 of one of the two adjacent battery groups 200, and the second discharge channel 520 is connected to the pressure relief structure 211 of at least one battery cell 210 of the other of the two adjacent battery groups 200. At least one second thermal insulation member 320 is provided at at least one of the two ends of the first thermal insulation member 310 in the first direction. The second thermal insulation member 320 is clamped between the first cavity wall 111 and the battery group 200 glued to the first cavity wall 111 by a bonding member. It can also be understood here that by sealingly connecting the two ends of the first thermal insulation structure 300 in the first direction to the two first cavity walls 111 respectively, and spacing the first thermal insulation component 310 of the first thermal insulation structure 300 between two adjacent battery groups 200, it is possible to separate the space between the two adjacent battery groups 200 into mutually independent first exhaust channels 510 and second exhaust channels 520, thereby reducing the difficulty of forming the first exhaust channel 510 and the second exhaust channel 520.

[0059] At the same time, in two adjacent battery packs 200, the pressure relief structure 211 of at least one battery cell 210 of one of the battery packs 200 is connected to the first discharge channel 510, and the pressure relief structure 211 of at least one battery cell 210 of the other battery pack 200 is connected to the second discharge channel 520. In this way, the pressure discharged through the pressure relief structure 211 can be discharged into the discharge channel (the first discharge channel 510 or the second discharge channel 520), and then the pressure is discharged through the discharge channel to reduce the difficulty of pressure relief of the battery cell 210, thereby ensuring the safety of use of the battery cell 210, that is, ensuring the safety of use of the battery pack 1000.

[0060] In addition, through the above-mentioned setting, when two adjacent battery packs 200 dissipate heat and pressure, each battery pack 200 can release pressure through a separate discharge channel, so as to avoid the mutual influence of the two adjacent battery packs 200 during pressure release to a certain extent, further ensuring the safety of the battery pack 1000.

[0061] That is, the battery pack 200 of the present disclosure can not only release pressure smoothly, but also prevent adjacent battery packs 200 from affecting each other during pressure release.

[0062] In some embodiments, the pressure relief structure 211 of at least one battery cell 210 of one group of battery packs 200 faces the first discharge channel 510, and the pressure relief structure 211 of at least one battery cell 210 of another group of battery packs 200 faces the second discharge channel 520, thereby achieving communication between the pressure relief structure 211 and the discharge channel and reducing the difficulty of communication between the pressure relief structure 211 and the discharge channel, thereby ensuring that the pressure discharged through the pressure relief structure 211 can be directly discharged into the discharge channel, reducing the difficulty of pressure relief, and also making adjacent battery packs 200 independent of each other during pressure relief, avoiding mutual influence between the battery packs 200 during pressure relief and chain loss of control, thereby improving the safety of the battery pack 1000.

[0063] It should be noted that the pressure relief structure 211 mentioned above can be understood as an explosion-proof valve, which is used to open when the internal pressure of the battery cell 210 exceeds a preset value to achieve the purpose of pressure relief. The explosion-proof valve is a prior art well known to those skilled in the art, and the specific structure of the explosion-proof valve is not described in detail here.

[0064] It should also be noted that by sealingly connecting the two ends of the first insulation structure 300 in the first direction to the two first cavity walls 111 respectively, the first discharge channel 510 and the second discharge channel 520 can be defined by the two first cavity walls 111, thereby reducing the difficulty of forming the first discharge channel 510 and the second discharge channel 520. At the same time, it can also avoid setting up separate structural parts to form the first discharge channel 510 and the second discharge channel 520, reducing the structural parts of the battery pack 1000, thereby achieving the purpose of simplifying the structure of the battery pack 1000, reducing the manufacturing cost of the battery pack 1000, and also improving the space utilization of the battery pack 1000, and facilitating the lightweighting of the battery pack 1000.

[0065] In addition, the two first cavity walls 111 can be used to support the first thermal insulation structure 300, eliminating the need to provide a support member in the battery pack 1000 to support the first thermal insulation structure 300, thereby further simplifying the structure of the battery pack 1000 and ensuring the positional stability of the first thermal insulation structure 300, thereby ensuring the working performance of the first thermal insulation structure 300.

[0066] Among them, the above-mentioned sealing connection can be formed by bonding, abutting or clamping. While the sealing connection enables the first insulation structure 300 and the first cavity wall 111 to form a fixed connection, it can also ensure the sealing of the first discharge channel 510 and the second discharge channel 520 to a certain extent, thereby avoiding the mutual influence of the two adjacent battery groups 200 during pressure release to a certain extent, and ensuring the safety of the battery pack 1000.

[0067] In addition, the present disclosure provides at least one second thermal insulation member 320 at at least one of the two ends of the first thermal insulation member 310 in the first direction, and clamps the second thermal insulation member 320 between the first cavity wall 111 and the battery pack 200 glued and fixed to the first cavity wall 111 by means of adhesive. This means that the battery pack 200 and the first cavity wall 111 are glued and fixed by means of adhesive, and the second thermal insulation member 320 is clamped between the first cavity wall 111 and the battery pack 200. In this way, not only can the second thermal insulation member 320 be used to achieve a sealed connection between the first thermal insulation structure 300 and the first cavity wall 111, but the second thermal insulation member 320 can also be used to limit the thickness of the adhesive between the first cavity wall 111 and the battery pack 200, thereby avoiding a low connection strength between the first cavity wall 111 and the battery pack 200 due to a thin adhesive.

[0068] That is to say, the second thermal insulation member 320 can ensure that the first thermal insulation structure 300 and the first cavity wall 111 can form a sealed connection, while also enabling the first cavity wall 111 and the battery pack 200 to form a stable fixed connection, thereby improving the position stability of the battery pack 200.

[0069] The adhesive bonding member mentioned here can be understood as glue or solid glue, etc.

[0070] As can be seen from the above structure, the battery pack 1000 of the embodiment of the present disclosure, by providing a first thermal insulation structure 300, and utilizing the first thermal insulation member 310 of the first thermal insulation structure 300 to separate the space between two adjacent battery packs 200 into a first discharge channel 510 and a second discharge channel 520. In this way, while ensuring that the battery pack 200 can effectively release pressure when thermal runaway occurs, it can also enable separate pressure relief between the two adjacent battery packs 200, thereby avoiding to a certain extent the impact of one battery pack 200 on the other adjacent battery pack 200 during pressure relief, thereby improving the safety of the battery pack 1000.

[0071] At the same time, the two ends of the first thermal insulation structure 300 in the first direction are sealed and connected to the two first cavity walls 111 respectively, so that the first discharge channel 510 and the second discharge channel 520 are defined by the two first cavity walls 111, thereby reducing the difficulty of forming the first discharge channel 510 and the second discharge channel 520, and also reducing the structural parts of the battery pack 1000, thereby achieving the purpose of simplifying the structure of the battery pack 1000 and reducing the manufacturing cost of the battery pack 1000.

[0072] In addition, at least one second thermal insulation member 320 is provided on at least one of the two ends in the first direction of the first thermal insulation member 310, and the second thermal insulation member 320 is clamped between the first cavity wall 111 and the battery pack 200, so as to facilitate the use of the second thermal insulation member 320 to achieve a sealed connection between the first thermal insulation structure 300 and the first cavity wall 111. While reducing the connection strength between the first thermal insulation structure 300 and the first cavity wall 111, it can also ensure the connection area between the first thermal insulation structure 300 and the first cavity wall 111, thereby improving the connection strength. At the same time, the second thermal insulation member 320 can also be used to limit the thickness of the adhesive between the first cavity wall 111 and the battery pack 200, thereby avoiding the low connection strength between the first cavity wall 111 and the battery pack 200 due to the thin adhesive.

[0073] In other words, the battery pack 1000 disclosed in the present invention not only reduces the difficulty of pressure relief of the battery pack 200, but also avoids the mutual influence between adjacent battery packs 200 during the pressure relief process, while simplifying the structure of the battery pack 1000, ensuring the assembly quality of the battery pack 1000, reducing the manufacturing cost of the battery pack 1000, and improving the space utilization of the battery pack 1000.

[0074] It can be understood that, compared with the prior art, the present disclosure sets a first insulation structure 300 between two adjacent battery packs 200 to form mutually independent first and second exhaust channels 510, 520 between the two adjacent battery packs 200, and sets the first cavity wall 111 of the outer shell 100 to participate in defining the first and second exhaust channels 510, 520. In this way, while avoiding the mutual influence of the two adjacent battery packs 200 during pressure relief, the difficulty of forming the first and second exhaust channels 510, 520 can be reduced, and the structure of the battery pack 1000 can be simplified, the manufacturing cost of the battery pack 1000 can be reduced, the weight of the battery pack 1000 can be reduced, and the space utilization rate of the battery pack 1000 can be improved.

[0075] It should be noted that, in the battery pack 1000 , the multiple battery cells 210 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 210 are connected in both series and in parallel.

[0076] In some embodiments, as shown in Figure 4, the first discharge channel 510 and the second discharge channel 520 are respectively arranged on opposite sides of the first thermal insulation member 310 in the second direction. This can reduce the difficulty of forming the first discharge channel 510 and the second discharge channel 520, and can also avoid setting the discharge channel in the first thermal insulation member 310, which is beneficial to reducing the thickness of the first thermal insulation member 310 and reducing the manufacturing cost of the first thermal insulation member 310. At the same time, it can also reduce the weight of the first thermal insulation member 310, realize the lightweight of the first thermal insulation member 310, and also improve the space utilization rate of the battery pack 1000.

[0077] In some embodiments, the first thermal insulation member 310 is a mica board, which has a high melting point. This can prevent the heat discharged from the battery pack 200 from breaking through the first thermal insulation member 310, thereby improving the thermal insulation performance of the first thermal insulation member 310. In this way, to a certain extent, the two adjacent battery packs 200 can be prevented from affecting each other during pressure relief, thereby ensuring the safety of the battery pack 1000.

[0078] In some embodiments, as shown in Figure 1, the housing 100 includes a base 120 and an upper cover 130, and the upper cover 130 is connected to the base 120 to form a accommodating cavity 110 in the housing 100, thereby reducing the difficulty of forming the accommodating cavity 110 and reducing the difficulty of assembling the battery pack 200 to ensure that the battery pack 200 can be effectively arranged in the accommodating cavity 110.

[0079] Optionally, as shown in Figure 1, the base 120 can be a hollow structure with one end open, and the upper cover 130 can be a plate-like structure, and the upper cover 130 covers the open side of the base 120, so that the base 120 and the upper cover 130 jointly define the accommodating cavity 110; or, the base 120 and the upper cover 130 can also both be hollow structures with one side open (not shown in this example figure), and the open side of the upper cover 130 covers the open side of the base 120, so that the base 120 and the upper cover 130 jointly define the accommodating cavity 110.

[0080] Of course, the housing 100 formed by the base 120 and the upper cover 130 can be in various shapes, such as a cylinder or a cuboid.

[0081] In some embodiments, the base 120 and the upper cover 130 are arranged opposite to each other in a first direction, and a side wall of the base 120 facing the upper cover 130 is formed as one of the first cavity walls 111 of the accommodating cavity 110, and a side wall of the upper cover 130 facing the base 120 is formed as the other first cavity wall 111 of the accommodating cavity 110, so that each accommodating cavity 110 has two first cavity walls 111 and the two first cavity walls 111 are arranged opposite to each other in the first direction, thereby reducing the difficulty of molding the two first cavity walls 111 of the accommodating cavity 110.

[0082] Optionally, as shown in Figure 1, a seal 840 is provided between the base 120 and the upper cover 130, and the seal 840 is used to achieve a sealed connection between the base 120 and the upper cover 130. In this way, while ensuring the sealing performance of the accommodating cavity 110, the base 120 and the upper cover 130 can also be fixedly connected to improve the structural stability of the housing 100, while reducing the difficulty of connecting the base 120 and the upper cover 130.

[0083] In some embodiments, the sealing member 840 is formed as a sealant, thereby facilitating the use of the sealing member 840 to achieve a sealed and fixed connection between the base 120 and the upper cover 130 .

[0084] In some embodiments, as shown in FIG. 1 , the housing 100 further includes a protective plate 140 . The protective plate 140 is disposed on the outer side of the base 120 to protect the housing 100 and extend the service life of the housing 100 .

[0085] In some embodiments, as shown in FIG1 , the battery pack 1000 further includes a battery management system 900 , which is disposed in one of the accommodating cavities 110 . The battery management system 900 is used to monitor the status of the battery cells 210 to ensure the working performance and safety of the battery cells 210 .

[0086] In some embodiments, when both ends of the first thermal insulation structure 300 in the first direction are respectively sealed and connected to the two first cavity walls 111, the two adjacent battery packs 200 are both sealed and connected to the two first cavity walls 111. This means that when the first thermal insulation structure 300 is sealed and connected to the two first cavity walls 111, the two adjacent battery packs 200 are also sealed and connected to the two first cavity walls 111, thereby preventing the pressure discharged into the first exhaust channel 510 and the second exhaust channel 520 from being discharged between the battery pack 200 and the corresponding first cavity wall 111 to a certain extent, thereby ensuring that the pressure discharged into the first exhaust channel 510 and the second exhaust channel 520 can be discharged along a predetermined route, thereby ensuring the safety of the battery pack 1000.

[0087] In addition, by sealingly connecting two adjacent battery packs 200 to the two first cavity walls 111 and sealingly connecting the first thermal insulation structure 300 to the two first cavity walls 111, the two first cavity walls 111 can also be used to cooperate in supporting the battery pack 200 and the first thermal insulation structure 300, so as to reduce the difficulty of fixing the battery pack 200 and the first thermal insulation structure 300, while improving the structural stability of the battery pack 200 and the first thermal insulation structure 300, and to a certain extent avoid shaking of the battery pack 200 and the first thermal insulation structure 300, thereby ensuring the working performance of the battery pack 200 and the first thermal insulation structure 300.

[0088] In some embodiments, the battery pack 200 is connected to the first cavity wall 111 through adhesive joints to achieve a sealed connection between the battery pack 200 and the two first cavity walls 111, reduce the difficulty of connecting the battery pack 200 and the first cavity wall 111, and ensure the connection quality between the battery pack 200 and the first cavity wall 111.

[0089] In some embodiments, as shown in FIG4 , the second thermal insulator 320 is bent and connected to the first thermal insulator 310 and is sealed to the first cavity wall 111. This allows the second thermal insulator 320 to achieve a sealed connection between the first thermal insulator 310 and the first cavity wall 111, thereby supporting the first thermal insulator 310 with the first cavity wall 111. Furthermore, the first cavity wall 111 of the housing 100 can also help define the first and second drainage channels 510, 520, thereby reducing the difficulty of forming the first and second drainage channels 510, 520.

[0090] Optionally, in combination with Figures 2, 3 and 4, the second thermal insulation member 320 extends along the second direction so that the second thermal insulation member 320 is bent and connected to the first thermal insulation member 310 and sealed to the first cavity wall 111, reducing the difficulty of fixing the second thermal insulation member 320.

[0091] In some embodiments, in combination with Figures 2, 3 and 4, a second thermal insulation member 320 is provided at one of the two ends of the first thermal insulation member 310 in the first direction, and the ends of the first thermal insulation member 310 and the second thermal insulation member 320 away from each other are respectively sealed and connected to the corresponding first cavity wall 111. That is to say, one end of the first thermal insulation member 310 away from the second thermal insulation member 320 is sealed and connected to the corresponding first cavity wall 111, and one end of the second thermal insulation member 320 away from the first thermal insulation member 310 is sealed and connected to the corresponding first cavity wall 111. In this way, the two ends of the first thermal insulation structure 300 in the first direction can be sealed and connected to the two first cavity walls 111 respectively, so as to separate the space between the two adjacent battery packs 200 into the first discharge channel 510 and the second discharge channel 520, and make the first discharge channel 510 and the second discharge channel 520 defined by the two first cavity walls 111, thereby reducing the difficulty of forming the first discharge channel 510 and the second discharge channel 520. When each battery pack 200 is depressurized through a separate discharge channel, the structural parts of the battery pack 1000 can also be reduced, thereby achieving the purpose of simplifying the structure of the battery pack 1000 and reducing the manufacturing cost of the battery pack 1000.

[0092] In some embodiments, as shown in Figures 2, 3, and 4, one end of the first thermal insulator 310, which is away from the second thermal insulator 320, is inserted into a corresponding slot 1111 on the first cavity wall 111. In other words, one end of the first thermal insulator 310 is sealed to the first cavity wall 111 via the second thermal insulator 320, while the other end of the first thermal insulator 310 is inserted into a corresponding slot 1111 on the first cavity wall 111. This allows both opposing ends of the first thermal insulator 310 to form a sealed connection with the first cavity wall 111, and reduces the difficulty of securing the first thermal insulation structure 300.

[0093] In some embodiments, as shown in Figure 4, two protrusions are provided on one of the two first cavity walls 111, and a slot 1111 is formed between the two protrusions. In this way, while the first thermal insulation member 310 is plugged into and fitted with one of the first cavity walls 111, the difficulty of forming the slot 1111 is reduced, and the structural strength of the first cavity wall 111 is avoided from being reduced due to the provision of the slot 1111, thereby extending the service life of the shell 100.

[0094] The sealing connection between the second thermal insulation component 320 and the first cavity wall 111 can be formed by bonding, abutting or other connection methods.

[0095] In a specific example, through the above-mentioned arrangement, after the assembly of two adjacent battery packs 200 is completed, one end of the first thermal insulation member 310 that is plugged into the first cavity wall 111 can be first inserted between the two adjacent battery packs 200 and plugged into the slot 1111 on the first cavity wall 111, and then the second thermal insulation member 320 provided on the other end of the first thermal insulation member 310 is sealed and connected to the first cavity wall 111 to achieve the purpose of fixing the first thermal insulation structure 300, and realize the use of the first thermal insulation structure 300 to separate the space between the two adjacent battery packs 200 into mutually independent first discharge channels 510 and second discharge channels 520, thereby avoiding the mutual influence of the two adjacent battery packs 200 during pressure relief to a certain extent, and ensuring the safety of the battery pack 1000.

[0096] In some embodiments, as shown in FIG4 , two second thermal insulation members 320 are provided at one end of the first thermal insulation member 310 in the first direction. The two second thermal insulation members 320 are located on either side of the first thermal insulation member 310 in the second direction. In other words, the two second thermal insulation members 320 are located on either side of the first thermal insulation member 310 in the second direction. The two second thermal insulation members 320 cooperate to strengthen the connection between the first thermal insulation member 310 and the first cavity wall 111, thereby stabilizing the position of the first thermal insulation structure 300 and preventing adjacent battery packs 200 from interfering with each other during pressure relief.

[0097] In some embodiments, the two second thermal insulation members 320 are formed as an integral part to reduce the difficulty of molding the two second thermal insulation members 320, and at the same time reduce the difficulty of connecting the two second thermal insulation members 320 with the first thermal insulation member 310, so as to facilitate the use of the second thermal insulation members 320 to increase the connection strength between the first thermal insulation member 310 and the first cavity wall 111, thereby improving the positional stability of the first thermal insulation structure 300.

[0098] Optionally, the first thermal insulation structure 300 is formed as an integral part, which can eliminate the connection between the second thermal insulation part 320 and the first thermal insulation part 310. While reducing the molding difficulty of the first thermal insulation structure 300, it can also ensure the connection quality between the second thermal insulation part 320 and the first thermal insulation part 310, thereby improving the structural stability of the first thermal insulation structure 300 and ensuring the working performance of the first thermal insulation structure 300.

[0099] In some embodiments, as shown in FIG4 , the second thermal insulation member 320 is interposed between the battery pack 200 and the first cavity wall 111 and is connected to the corresponding battery pack 200. In other words, the second thermal insulation member 320 is not only sealed and connected to the first cavity wall 111, but also connected to the battery pack 200. This allows the first cavity wall 111 and the battery pack 200 to cooperate and support the second thermal insulation member 320, thereby improving the positional stability of the second thermal insulation member 320 and thus improving the positional stability of the first thermal insulation structure 300, thereby ensuring the working performance of the first thermal insulation structure 300.

[0100] It should be noted that when the second thermal insulation member 320 is clamped between the battery pack 200 and the first cavity wall 111 and connected to the battery pack 200, by respectively arranging the two second thermal insulation members 320 on both sides of the first thermal insulation member 310 in the second direction, the two second thermal insulation members 320 can also be respectively connected to the two adjacent battery packs 200, so that the position of the first thermal insulation structure 300 relative to the two adjacent battery packs 200 is stable, which is conducive to using the first thermal insulation structure 300 to avoid the two adjacent battery packs 200 from affecting each other during pressure relief, thereby ensuring the safety of the battery pack 1000.

[0101] In some embodiments, in combination with Figures 6 and 7, the battery pack 200 includes mounting brackets 600 spaced apart on both sides in the first direction of the battery pack 200, and the second thermal insulation member 320 is sealedly connected to the mounting bracket 600, thereby realizing the connection between the second thermal insulation member 320 and the battery pack 200. This reduces the difficulty of connecting the second thermal insulation member 320 to the battery pack 200 while also preventing the second thermal insulation member 320 from damaging the battery cell 210 when connected to the battery pack 200, thereby extending the service life of the battery cell 210 and improving the safety of the battery cell 210.

[0102] In some embodiments, the second thermal insulation member 320 is respectively bonded to the mounting bracket 600 of the battery pack 200 and the first cavity wall 111, thereby achieving a sealed connection between the second thermal insulation member 320 and the battery pack 200 and the first cavity wall 111, and reducing the difficulty of connecting the second thermal insulation member 320 to the battery pack 200 and the first cavity wall 111, while ensuring the connection strength between the second thermal insulation member 320 and the battery pack 200 and the first cavity wall 111.

[0103] In some embodiments, as shown in FIG4 , in the second direction, the overlap length L between the second thermal insulation member 320 and the battery pack 200 is greater than 10 mm. This ensures the overlap area between the second thermal insulation member 320 and the battery pack 200, thereby ensuring the connection strength between the second thermal insulation member 320 and the battery pack 200, allowing the second thermal insulation member 320 to be stably sandwiched between the battery pack 200 and the first cavity wall 111, thereby improving the structural stability of the first thermal insulation structure 300, ensuring the operating performance of the first thermal insulation structure 300, and ensuring the connection quality between the battery pack 200 and the first cavity wall 111.

[0104] In a specific example, in the second direction, the overlap length L between the second thermal insulation member 320 and the battery pack 200 is 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or 20 mm, etc.

[0105] In some embodiments, as shown in FIG4 , the first thermal insulator 310 is formed into a plate-like structure, and the thickness of the first thermal insulator 310 is t ≥ 1 mm. Forming the first thermal insulator 310 into a plate-like structure can reduce the difficulty of molding the first thermal insulator 310 . Setting the thickness of the first thermal insulator 310 to t ≥ 1 mm improves the structural strength of the first thermal insulator 310 while also ensuring its thermal insulation performance. This prevents mutual interference between adjacent battery packs 200 during pressure relief, thereby ensuring the safety of the battery pack 1000 .

[0106] In a specific example, the thickness T of the first thermal insulation member 310 is 1 mm, 2 mm, or 3 mm.

[0107] In some embodiments, the thickness of the first thermal insulation member 310 is 1 mm to 2 mm. This allows the first thermal insulation member 310 to be used for thermal insulation while reducing its thickness, lowering its manufacturing cost, and reducing its weight. Furthermore, the space occupied by the first thermal insulation member 310 is reduced, thereby improving the space utilization of the battery pack 1000.

[0108] In some embodiments, as shown in FIG4 , the second thermal insulator 320 is formed into a plate-like structure, and the thickness T of the second thermal insulator 320 is ≥ 1 mm. Forming the second thermal insulator 320 into a plate-like structure can reduce the difficulty of molding the second thermal insulator 320 . Furthermore, because the second thermal insulator 320 is sandwiched between the battery pack 200 and the first cavity wall 111 , the thickness of the second thermal insulator 320 is limited. This can limit the thickness of the connection between the battery pack 200 and the first cavity wall 111 , thereby ensuring the connection quality between the battery pack 200 and the first cavity wall 111 and improving the positional stability of the battery pack 200 .

[0109] In a specific example, the thickness T of the second thermal insulation member 320 is 1 mm, 2 mm, or 3 mm.

[0110] In some embodiments, at least one of two adjacent battery packs 200 is bonded to at least one of the two first cavity walls 111. This allows at least one of the battery packs 200 to be bonded to the first cavity wall 111, thereby achieving bonding between the battery pack 200 and the housing 100. This allows the battery pack 200 to be stably positioned within the housing 100, thereby improving the positional stability of the battery pack 200 and ensuring the safety of the battery pack 200, thereby ensuring the operating performance of the battery pack 200.

[0111] In a specific example, two adjacent battery packs 200 are bonded to the two first cavity walls 111 , which increases the connection strength between the battery pack 200 and the outer shell 100 , improves the position stability of the battery pack 200 , and helps to ensure the structural strength of the battery pack 1000 .

[0112] Optionally, the first thermal insulation structure 300 is adhesively connected to at least one of the two first cavity walls 111. This ensures a sealed connection between the first thermal insulation structure 300 and the first cavity wall 111, reduces the difficulty of connecting the first thermal insulation structure 300 and the first cavity wall 111, and ensures the quality of the connection between the first thermal insulation structure 300 and the first cavity wall 111. This allows the first cavity wall 111 to support the first thermal insulation structure 300, allowing the first thermal insulation structure 300 to be stably disposed within the housing 100, improving the positional stability of the first thermal insulation structure 300, and ensuring the safety of use of the first thermal insulation structure 300, thereby ensuring the working performance of the first thermal insulation structure 300.

[0113] In a specific example, the first thermal insulation structure 300 is adhesively connected to one of the two first cavity walls 111 and is plugged into the other of the two first cavity walls 111. This allows the first thermal insulation structure 300 to be fixedly connected to the two first cavity walls 111 at the same time, while also reducing the difficulty of connecting the first thermal insulation structure 300.

[0114] In some embodiments, as shown in Figures 2, 3, and 5, all pressure relief structures 211 of at least one battery pack 200 are disposed on both sides of the battery pack 200 in the second direction. The accommodating chamber 110 further comprises two second chamber walls 112 disposed opposite each other along the second direction. The battery pack 200 and the second chamber walls 112 are spaced apart so that a third drain channel 530 is provided between the battery pack 200 and the second chamber walls 112. The third drain channel 530 communicates with the portion of the pressure relief structures 211 of the battery pack 200 adjacent to the second chamber walls 112. In other words, the battery pack 200 and the second chamber walls 112 cooperate to form the third drain channel 530. This reduces the difficulty of forming the third drain channel 530 while ensuring that pressure released from the pressure relief structures 211 can be discharged into the third drain channel 530. The pressure is then released through the third drain channel 530, achieving the purpose of pressure relief. This reduces the difficulty of pressure relief for the battery cells 210, thereby ensuring the safety of the battery cells 210 and, consequently, the battery pack 1000.

[0115] At the same time, by arranging all the pressure relief structures 211 of at least one battery pack 200 on both sides of the battery pack 200 in the second direction, it is also convenient to connect adjacent battery cells 210 in the same battery pack 200, reducing the difficulty of connecting the battery cells 210.

[0116] In some embodiments, the second cavity wall 112 is made of a heat-insulating material, which can prevent the heat discharged from the battery pack 200 from penetrating the second cavity wall 112 and improve the safety of the battery pack 1000.

[0117] In some embodiments, the battery pack 200 adjacent to the second cavity wall 112 is sealedly connected to the two first cavity walls 111. This means that when a third drain channel 530 is provided between the battery pack 200 and the second cavity wall 112, the battery pack 200 adjacent to the second cavity wall 112 is sealedly connected to the two first cavity walls 111, thereby preventing the pressure discharged into the third drain channel 530 from being discharged from between the battery pack 200 and the corresponding first cavity wall 111 to a certain extent. This ensures that the pressure discharged into the third drain channel 530 can be discharged along a predetermined route, thereby ensuring the safety of the battery pack 1000.

[0118] In some embodiments, as shown in conjunction with Figures 2, 3, and 5, the battery pack 1000 further includes a second thermal insulation structure 400. At least a portion of the second thermal insulation structure 400 is disposed between the battery pack 200 and the second cavity wall 112, separating the space between the battery pack 200 and the second cavity wall 112 into a third drain channel 530. In other words, the third drain channel 530 is not limited to being formed solely by the battery pack 200 and the second cavity wall 112. Alternatively, the second thermal insulation structure 400 may be disposed between the battery pack 200 and the second cavity wall 112 to define the third drain channel 530. This ensures that pressure discharged through the pressure relief structure 211 can be discharged into the third drain channel 530. The pressure is then discharged through the third drain channel 530, achieving the purpose of pressure relief. This reduces the difficulty of pressure relief for the battery cells 210, thereby ensuring the safety of the battery cells 210 and, therefore, the battery pack 1000.

[0119] At the same time, by providing the second heat insulating structure 400 , it is possible to avoid having to configure the second cavity wall 112 to be made of a heat insulating material, thereby reducing the difficulty and cost of processing the second cavity wall 112 .

[0120] In some embodiments, as shown in Figures 1, 2 and 3, at least one second cavity wall 112 is provided in the middle of the outer shell 100 in the second direction. In this way, not only can the second cavity wall 112 be used to enhance the structural strength of the outer shell 100, but also a plurality of accommodating cavities 110 can be formed in the outer shell 100, thereby facilitating the arrangement of a plurality of battery packs 200 in the outer shell 100 to ensure the capacity of the battery pack 1000.

[0121] In addition, the second cavity wall 112 can also play a role in fixing the battery pack 200 to improve the structural stability of the battery pack 200 and ensure the working performance of the battery pack 200.

[0122] In some embodiments, the third discharge channel 530 is formed between the battery pack 200 and the second cavity wall 112. This can reduce the difficulty of forming the third discharge channel 530 while avoiding the need to set the third discharge channel 530 in the second thermal insulation structure 400, which is beneficial for reducing the thickness of the second thermal insulation structure 400 and reducing the manufacturing cost of the second thermal insulation structure 400. At the same time, it can also reduce the weight of the second thermal insulation structure 400, achieve lightweighting of the second thermal insulation structure 400, and improve the space utilization of the battery pack 1000.

[0123] In some embodiments, as shown in FIG3 , the accommodating chamber 110 further comprises two third chamber walls 113 disposed opposite each other along a third direction. A fourth drain channel is formed in at least one of the third chamber walls 113 . At least one of the first drain channel 510 , the second drain channel 520 , and the third drain channel 530 communicates with the fourth drain channel. The first and second directions are perpendicular to the third direction. The third direction herein may be understood as the Z direction shown in FIG1 . By forming the fourth drain channel in at least one of the third chamber walls 113 and communicating at least one of the first drain channel 510 , the second drain channel 520 , and the third drain channel 530 with the fourth drain channel, pressure discharged into the first drain channel 510 , the second drain channel 520 , and / or the third drain channel 530 is directed into the fourth drain channel. The pressure is then discharged through the fourth drain channel to achieve pressure relief, thereby ensuring the safety of the battery pack 1000 .

[0124] In a specific example, the Z direction is the front-to-back direction of the battery pack 1000 .

[0125] In the description of the present disclosure, features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

[0126] In some embodiments, the first discharge channel 510, the second discharge channel 520 and the third discharge channel 530 are all connected to the fourth discharge channel to introduce the pressure discharged into the first discharge channel 510, the second discharge channel 520 and the third discharge channel 530 into the fourth discharge channel, and then the pressure is discharged through the fourth discharge channel to achieve the purpose of pressure relief.

[0127] In some embodiments, a pressure relief valve is provided on the outer shell 100 of the battery pack 1000, and the pressure relief valve is connected to the fourth discharge channel. When the pressure in the fourth discharge channel is too high, the pressure can break through the pressure relief valve and be discharged through the pressure relief valve to achieve the purpose of pressure relief and ensure the safety of the battery pack 1000.

[0128] In some embodiments, at least one third cavity wall 113 is hollow inside, so as to form a fourth discharge channel in the third cavity wall 113 , thereby reducing the difficulty of forming the fourth discharge channel.

[0129] In some embodiments, as shown in FIG5 , the battery pack 1000 further includes a second thermal insulation structure 400, which is sealedly connected to at least one of the two first cavity walls 111, so that at least one of the two first cavity walls 111 participates in defining the third drain channel 530. This facilitates the formation of the third drain channel 530 while also utilizing the inherent structure of the housing 100 to define the third drain channel 530. This avoids the need for separate structural components to form the third drain channel 530, thus reducing the number of structural components in the battery pack 1000. This simplifies the structure of the battery pack 1000, reduces the manufacturing cost of the battery pack 1000, improves the space utilization of the battery pack 1000, and facilitates lightweighting of the battery pack 1000.

[0130] In some embodiments, as shown in Figure 5 , the second thermal insulation structure 400 includes a third thermal insulation member 410, which is fixed to the second cavity wall 112 and sealed to each of the two first cavity walls 111. This improves the positional stability of the third thermal insulation member 410 while allowing both first cavity walls 111 of the housing 100 to contribute to defining the third exhaust channel 530, thereby reducing the difficulty of forming the third exhaust channel 530. Furthermore, the need for structural members defining the third exhaust channel 530 at both ends of the third exhaust channel 530 in the first direction can be eliminated, simplifying the structure of the battery pack 1000.

[0131] At the same time, by fixing the third thermal insulation member 410 on the second cavity wall 112, the second cavity wall 112 and the battery pack 200 can also be separated to prevent the heat of the battery pack 200 from being transferred to the second cavity wall 112 during pressure relief, that is, to prevent the heat from being directly transferred to the outer shell 100, thereby improving the safety of the battery pack 1000.

[0132] In some embodiments, the third thermal insulation member 410 is formed as a mica board, so that while the third thermal insulation member 410 is formed as an insulation board, the high temperature resistance of the third thermal insulation member 410 can also be guaranteed, thereby ensuring the thermal insulation effect of the third thermal insulation member 410.

[0133] In some embodiments, the third thermal insulation member 410 is bonded to the second cavity wall 112 to achieve a fixed connection between the third thermal insulation member 410 and the second cavity wall 112, and reduce the difficulty of connecting the third thermal insulation member 410 and the second cavity wall 112, while ensuring the connection strength between the third thermal insulation member 410 and the second cavity wall 112, ensuring the positional stability of the third thermal insulation member 410, and thus ensuring the working performance of the third thermal insulation member 410.

[0134] Optionally, the opposite ends of the third thermal insulation member 410 are abutted against the two first cavity walls 111 to achieve a sealed connection between the third thermal insulation member 410 and the two first cavity walls 111, and reduce the difficulty of connecting the third thermal insulation member 410 and the two first cavity walls 111.

[0135] In some embodiments, the pressure relief structures 211 of two adjacent electrically connected battery cells 210 of at least one battery pack 200 are respectively disposed on both sides of the battery pack 200 in the second direction, and the terminals of two adjacent electrically connected battery cells 210 of at least one battery pack 200 are respectively disposed on both sides of the battery pack 200 in the second direction. This allows two adjacent electrically connected battery cells 210 to be connected in series, thereby reducing the difficulty of connecting the two adjacent electrically connected battery cells 210, and thereby reducing the difficulty of assembling the battery pack 1000.

[0136] Of course, in some other embodiments, when a parallel connection needs to be formed between two adjacent electrically connected battery cells 210, the poles of two adjacent electrically connected battery cells 210 of the same battery pack 200 can also be arranged on the same side of the battery pack 200 in the second direction, and the present disclosure does not make specific restrictions.

[0137] In some embodiments, as shown in Figures 1, 6, and 7, the battery pack 200 includes multiple rows of battery cells 220 arranged sequentially along a first direction. Each row of battery cells 220 includes multiple battery cells 210 arranged sequentially along a third direction. The first direction and the second direction are both perpendicular to the third direction. This arrangement allows for the rational utilization of the space within the housing 100, allowing for a larger number of battery cells 210 to be accommodated within the housing 100. This facilitates increasing the capacity of the battery pack 1000 and ensuring the performance of the battery pack 1000.

[0138] In some embodiments, as shown in FIG7 , the battery cells 210 are cylindrical batteries, and the axial direction of the cylindrical batteries is parallel to the second direction. This allows the battery cells 210 to be placed horizontally within the housing 100 . Compared to the prior art method of placing the battery cells 210 vertically within the housing 100 , this facilitates increasing the height of the battery pack 1000 , thereby facilitating an increase in the number of battery rows 220 and improving the capacity of the battery pack 1000 .

[0139] At the same time, by configuring the battery cell 210 as a cylindrical battery, the operating performance and reliability of the battery cell 210 can be guaranteed to a certain extent, thereby ensuring the operating performance of the battery pack 1000 .

[0140] In addition, by setting the axial direction of the cylindrical battery to be parallel to the second direction, the pressure relief structure 211 of the battery cell 210 can be set directly opposite the discharge channel, reducing the difficulty of pressure relief of the battery cell 210 and ensuring the safety of the battery cell 210.

[0141] In some embodiments, as shown in FIG8 , the battery cells 210 of two adjacent rows of battery rows 220 are staggered in the third direction. The staggered arrangement herein means that the projections of the axes of the battery cells 210 of the two adjacent rows of battery rows 220 on the first cavity wall 111 and / or the second cavity wall 112 do not overlap. This allows the battery cells 210 of one row of battery rows 220 to be positioned directly between two adjacent battery cells 210 of the other row in the first direction. Because the battery cells 210 are cylindrical, the space between the two adjacent battery cells 210 can be rationally utilized, allowing portions of the battery cells 210 of one row of battery rows 220 to be positioned between two adjacent battery cells 210 of the other row. This reduces the size of the battery pack 1000 in the first direction, facilitating a reduction in the space occupied by the battery pack 1000 and easing the difficulty of installing the battery pack 1000.

[0142] In some embodiments, as shown in conjunction with Figures 6 and 7 , the battery pack 200 further includes a mounting bracket 600. The mounting bracket 600 is provided on at least one of the two sides of the multiple battery rows 220 in the first direction. The mounting bracket 600 is sealed to the corresponding first cavity wall 111. A plurality of mounting slots 610 arranged sequentially along the third direction are formed on the side of the mounting bracket 600 facing the battery rows 220. The multiple battery cells 210 of the battery rows 220 are respectively positioned and engaged with the corresponding mounting slots 610. It can also be understood that the mounting bracket 600 is provided on at least one of the two sides of the same battery pack 200 in the first direction. By sealingly connecting the mounting bracket 600 to the corresponding first cavity wall 111 and respectively engaging the multiple battery cells 210 in the corresponding mounting slots 610, the battery cells 210 are sealed to the first cavity wall 111. This facilitates the use of the first cavity wall 111 and the mounting bracket 600 to support the battery cells 210, ensuring the positional stability of the battery cells 210, and facilitating the structural strength of the battery pack 1000.

[0143] That is, the present disclosure provides a mounting bracket 600 , which is mainly used to fix the battery cell 210 to ensure the position stability of the battery cell 210 .

[0144] It should be noted that, since the battery pack 200 also includes a mounting bracket 600, when the second thermal insulation member 320 is clamped between the battery pack 200 and the first cavity wall 111 and needs to be sealed and connected to the battery pack 200, the second thermal insulation member 320 can be sealed and connected to the mounting bracket 600. In this way, while achieving a sealed connection between the second thermal insulation member 320 and the battery pack 200, it can also reduce the difficulty of connecting the second thermal insulation member 320 and the battery pack 200, and avoid damage to the battery cell 210 during connection, so as to extend the service life of the battery pack 200 and ensure the safety of the battery pack 200.

[0145] In some embodiments, in combination with Figures 1, 6 and 7, a first connecting member 810 is provided between the mounting bracket 600 and the corresponding first cavity wall 111. The first connecting member 810 is used to achieve a sealed connection between the mounting bracket 600 and the corresponding first cavity wall 111 to reduce the difficulty of fixing the mounting bracket 600. At the same time, the outer shell 100 can also be used to support the mounting bracket 600, thereby improving the structural stability of the mounting bracket 600 and thereby ensuring the working performance of the mounting bracket 600.

[0146] Optionally, in combination with Figures 1, 4 and 7, part of the first connecting member 810 is arranged between the mounting bracket 600 and the second thermal insulation member 320 to achieve a sealed connection between the second thermal insulation member 320 and the mounting bracket 600, and further achieve a sealed connection between the second thermal insulation member 320 and the battery pack 200.

[0147] In some embodiments, as shown in Figures 6 and 7, a second connecting member 820 is provided between the battery cell 210 and the mounting groove 610. The second connecting member 820 is used to achieve a fixed connection between the battery cell 210 and the mounting bracket 600, so as to achieve the purpose of supporting the battery cell 210 by using the mounting bracket 600. At the same time, it can also improve the position stability of the battery cell 210 to ensure the working performance of the battery cell 210.

[0148] In some embodiments, the first connector 810 and the second connector 820 are both formed as connecting glue, which is used to achieve a sealed connection between the mounting bracket 600 and the corresponding first cavity wall 111, as well as a fixed connection between the battery cell 210 and the mounting bracket 600, thereby ensuring the connection strength between the mounting bracket 600 and the first cavity wall 111 and the connection strength between the battery cell 210 and the mounting bracket 600, so that the relative positions of the structural parts of the battery pack 1000 are stable.

[0149] In some embodiments, as shown in Figures 6 and 7 , mounting brackets 600 are provided on both sides of the multiple rows of battery arrays 220 in the first direction, and the mounting brackets 600 on both sides of the multiple rows of battery arrays 220 in the first direction are fixedly connected. By providing mounting brackets 600 on both sides of the multiple rows of battery arrays 220 in the first direction, both sides of the same battery pack 200 in the first direction are sealedly connected to the corresponding first cavity wall 111, thereby achieving the purpose of using the first cavity wall 111 to support the battery pack 200 and improving the positional stability of the battery pack 200.

[0150] At the same time, by fixedly connecting the mounting brackets 600 on both sides of the multiple rows of battery rows 220 in the first direction, it is convenient to utilize the mounting brackets 600 on both sides to cooperate in supporting the multiple rows of battery rows 220, thereby improving the positional stability of the multiple rows of battery rows 220, and further improving the positional stability of the battery cells 210, so as to ensure the working performance of the battery cells 210.

[0151] In some embodiments, multiple rows of battery rows 220 are connected by bolts between the mounting brackets 600 on both sides in the first direction to achieve a fixed connection of the mounting brackets 600 on both sides and reduce the difficulty of connection. At the same time, the mounting brackets 600 on both sides can also form a detachable connection to facilitate maintenance of the battery cells 210 arranged in the mounting brackets 600.

[0152] In some embodiments, as shown in FIG6 , the battery pack 1000 further includes a heat exchange element 700 , which is disposed between two adjacent rows of battery cells 220 and performs heat exchange with the adjacent rows of battery cells 220. This achieves the purpose of regulating the temperature of the battery cells 220, that is, regulating the temperature of the battery cells 210 , so that the temperature of the battery cells 210 during operation can be maintained within an appropriate temperature range, ensuring the safety of the battery cells 210 and the operating performance of the battery cells 210 .

[0153] In some embodiments, the heat exchange element 700 is formed as a heat exchange plate filled with a heat exchange medium. The heat exchange medium exchanges heat with two adjacent rows of battery rows 220, thereby achieving the purpose of adjusting the temperature of the battery rows 220 using the heat exchange element 700.

[0154] Optionally, as shown in FIG. 6 , the battery pack 1000 further includes a conveying member 730 , which is configured to convey a heat exchange medium toward the heat exchange member 700 to ensure a heat exchange effect of the heat exchange member 700 .

[0155] The heat exchange medium mentioned here may be a refrigerant.

[0156] At the same time, the above setting can also enable a heat exchange element 700 to simultaneously exchange heat with two adjacent rows of battery rows 220. While adjusting the temperature of the battery rows 220, it can also reduce the number of heat exchange elements 700 used and reduce the cost of using the heat exchange elements 700.

[0157] In some embodiments, the heat exchange element 700 is fixedly connected to each battery cell 210 in two adjacent rows of battery cells 220. This stabilizes the relative positions of the battery cells 210 in the two adjacent rows of battery cells 220, and also stabilizes the relative positions of the heat exchange element 700 and the adjacent battery cells 210, thereby ensuring the heat exchange effect of the heat exchange element 700.

[0158] In some embodiments, as shown in Figure 6, a third connecting member 830 is provided between the heat exchange member 700 and each battery cell 210 of the battery row 220. The third connecting member 830 is used to achieve a fixed connection between the heat exchange member 700 and the battery cell 210, so that the position of the heat exchange member 700 relative to the battery cell 210 is stable, thereby facilitating the use of the heat exchange member 700 to dissipate heat from the battery cell 210.

[0159] In some embodiments, the third connecting member 830 is formed as a connecting glue, which can not only achieve a fixed connection between the heat exchange member 700 and the battery cell 210, but also ensure the connection strength between the heat exchange member 700 and the battery cell 210 and reduce the difficulty of connecting the heat exchange member 700 and the battery cell 210.

[0160] In summary, the various components of the battery pack 1000 disclosed in the present invention are bonded together. Compared with the prior art of pouring foam glue into the battery pack 1000 and setting a screw structure, while allowing the battery cell 210 to be firmly set in the outer shell 100, it can also effectively reduce the weight of the battery pack 1000, achieve lightweight battery pack 1000, and at the same time reduce the cost of the battery pack 1000 and ensure the heat dissipation efficiency of the battery cell 210.

[0161] In addition, by gluing the components of the battery pack 1000 together, the base 120, the upper cover 130 and the battery pack 200 can be connected to form a sandwich structure, which is beneficial to ensuring the structural strength of the battery pack 1000.

[0162] In some embodiments, as shown in conjunction with FIG6 and FIG8 , the battery cells 210 are cylindrical batteries, the axial direction of the cylindrical batteries being parallel to the second direction. The battery cells 210 of two adjacent battery rows 220 are staggered one-to-one in the third direction. The heat exchange element 700 includes a plurality of first protrusions 710 and a plurality of second protrusions 720, which are alternately arranged along the third direction. The first protrusions 710 and the second protrusions 720 protrude toward one of the two adjacent battery rows 220, and the second protrusions 720 protrude toward the other of the two adjacent battery rows 220. This allows grooves with different recessed directions to be formed on opposite sides of the heat exchange element 700. These different grooves cooperate to secure the two adjacent battery rows 220, allowing the heat exchange element 700 to be fixedly connected to each battery cell 210 in the two adjacent battery rows 220. This ensures a stable relative position between the heat exchange element 700 and the adjacent battery cells 210, thereby ensuring a heat exchange effect of the heat exchange element 700.

[0163] At the same time, by arranging multiple first protrusions 710 and multiple second protrusions 720 on the heat exchange component 700, it is also possible to stagger the battery cells 210 of two adjacent rows of battery rows 220 one by one in the third direction, so that in two adjacent rows of battery rows 220, part of the structure of the battery cells 210 of one row of battery rows 220 can be located between two adjacent battery cells 210 of the other row, reducing the size of the battery pack 1000 in the first direction, which is beneficial to reducing the space occupied by the battery pack 1000 and reducing the difficulty of installing the battery pack 1000.

[0164] The following describes the electric device 2000 according to an embodiment of the present disclosure with reference to the accompanying drawings.

[0165] As shown in FIG9 , an electric device 2000 according to an embodiment of the present disclosure includes a battery pack 1000 .

[0166] The battery pack 1000 is the aforementioned battery pack 1000 , and the specific structure of the battery pack 1000 is not described here in detail.

[0167] As can be seen from the above structure, the electric device 2000 of the embodiment of the present disclosure improves the safety of the electric device 2000 by adopting the aforementioned battery pack 1000 .

[0168] It should be noted that the electrical device 2000 of the present disclosure may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc.

[0169] Among them, when the power-consuming device 2000 is a vehicle, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

[0170] In some embodiments, a battery pack 1000 is provided in the vehicle. The battery pack 1000 can be disposed at the bottom, head, or tail of the vehicle. The battery pack 1000 can be used to power the vehicle. For example, the battery pack 1000 can serve as the operating power source of the vehicle.

[0171] In the description of this disclosure, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0172] Figures 6 and 7 both show two rows of battery rows 220 arranged sequentially in the first direction for illustrative purposes. However, after reading the above technical solution, ordinary technicians can obviously understand that the solution can be applied to the technical solution of three, four or more rows of battery rows 220, which also falls within the scope of protection of the present disclosure.

[0173] Other components of the battery pack 1000 and the electrical device 2000 having the same according to the embodiment of the present disclosure, such as the heat exchange principle of the heat exchange element 700 , are well known to those skilled in the art and will not be described in detail here.

[0174] Throughout this specification, references to terms such as "embodiment" and "example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0175] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, wherein: include: A housing (100), wherein at least one accommodating cavity (110) is formed in the housing (100), and the accommodating cavity (110) has two first cavity walls (111) arranged opposite to each other along a first direction; A battery pack (200), wherein at least one of the accommodating cavities (110) is provided with at least two groups of the battery packs (200) spaced apart along a second direction, each group of the battery packs (200) includes a plurality of battery cells (210), and the first direction intersects the second direction; A first heat-insulating structure (300), wherein both ends of the first heat-insulating structure (300) in the first direction are respectively sealed and connected to the two first cavity walls (111), and the first heat-insulating structure (300) comprises a first heat-insulating member (310) and a second heat-insulating member (320) connected to each other, wherein the first heat-insulating member (310) is arranged between two adjacent groups of battery packs (200) to separate the space between the two adjacent groups of battery packs (200) into a first discharge channel (510) and a second discharge channel (520), wherein the first discharge channel (510) and the two adjacent groups of battery packs (200) are connected to each other. The first heat insulating member (310) is connected to the pressure relief structure (211) of at least one battery cell (210) in one of the two adjacent battery packs (200), the second discharge channel (520) is connected to the pressure relief structure (211) of at least one battery cell (210) in the other of the two adjacent battery packs (200), at least one second heat insulating member (320) is provided at at least one end of the first heat insulating member (310) in the first direction, and the second heat insulating member (320) is sandwiched between the first cavity wall (111) and the battery pack (200) adhesively fixed to the first cavity wall (111) by an adhesive member.

2. The battery pack according to claim 1, wherein: The second thermal insulation member (320) is provided at one of the two ends of the first thermal insulation member (310) in the first direction, and the ends of the first thermal insulation member (310) and the second thermal insulation member (320) that are away from each other are respectively sealed and connected to the corresponding first cavity wall (111).

3. The battery pack according to claim 2, wherein: One end of the first thermal insulation member (310) away from the second thermal insulation member (320) is inserted into a slot (1111) corresponding to the first cavity wall (111).

4. The battery pack according to any one of claims 1 to 3, wherein: Two second thermal insulation members (320) are provided at one end of the first thermal insulation member (310) in the first direction, and the two second thermal insulation members (320) are respectively located on both sides of the first thermal insulation member (310) in the second direction.

5. The battery pack according to any one of claims 1 to 4, wherein: The second heat insulating member (320) is connected to the corresponding battery pack (200).

6. The battery pack according to any one of claims 1 to 5, wherein: In the second direction, the overlap length L between the second thermal insulation member (320) and the battery pack (200) is greater than 10 mm.

7. The battery pack according to any one of claims 1 to 6, wherein: The first thermal insulation member (310) is formed into a plate-shaped structure, and the thickness t of the first thermal insulation member (310) is ≥ 1 mm; and / or, The second thermal insulation member (320) is formed into a plate-shaped structure, and the thickness T of the second thermal insulation member (320) is ≥1 mm.

8. The battery pack according to any one of claims 1 to 7, wherein: At least one of two adjacent battery groups (200) is adhesively connected to at least one of the two first cavity walls (111); and / or, The first heat insulation structure (300) is bonded to at least one of the two first cavity walls (111).

9. The battery pack according to any one of claims 1 to 8, wherein: All the pressure relief structures (211) of at least one group of the battery packs (200) are respectively arranged on both sides of the battery pack (200) in the second direction, the accommodating cavity (110) further comprises two second cavity walls (112) arranged opposite to each other along the second direction, the battery pack (200) and the second cavity walls (112) are spaced apart so that a third discharge channel (530) is provided between the battery pack (200) and the second cavity wall (112), and the third discharge channel (530) is communicated with a portion of the pressure relief structures (211) of the battery pack (200) adjacent to the second cavity wall (112).

10. The battery pack according to claim 9, wherein: The battery pack (200) adjacent to the second cavity wall (112) is sealedly connected to two first cavity walls (111) respectively; and / or, The battery pack further includes a second thermal insulation structure (400), at least a portion of which is disposed between the battery pack (200) and the second cavity wall (112) and separates the space between the battery pack (200) and the second cavity wall (112) into the third exhaust channel (530).

11. The battery pack according to claim 9 or 10, wherein: The accommodating cavity (110) further comprises two third cavity walls (113) arranged opposite to each other along a third direction, a fourth discharge channel being formed in at least one of the third cavity walls (113), and at least one of the first discharge channel (510), the second discharge channel (520) and the third discharge channel (530) being connected to the fourth discharge channel, and the first direction and the second direction are respectively perpendicular to the third direction.

12. The battery pack according to any one of claims 9 to 11, wherein: The battery pack further includes a second thermal insulation structure (400), wherein the second thermal insulation structure (400) is sealed and connected to at least one of the two first cavity walls (111), so that at least one of the two first cavity walls (111) participates in defining the third exhaust channel (530).

13. The battery pack according to claim 12, wherein: The second thermal insulation structure (400) comprises a third thermal insulation component (410), wherein the third thermal insulation component (410) is fixed on the second cavity wall (112) and is sealedly connected to the two first cavity walls (111) respectively.

14. The battery pack according to any one of claims 9 to 13, wherein: The pressure relief structures (211) of two adjacent electrically connected battery cells (210) of the at least one group of battery packs (200) are respectively arranged on both sides of the battery pack (200) in the second direction, and the poles of two adjacent electrically connected battery cells (210) of the at least one group of battery packs (200) are respectively arranged on both sides of the battery pack (200) in the second direction.

15. The battery pack according to any one of claims 1 to 14, wherein: The battery pack (200) comprises a plurality of battery rows (220) sequentially arranged along the first direction, each row of the battery rows (220) comprising a plurality of battery cells (210) sequentially arranged along a third direction, and the first direction and the second direction are respectively perpendicular to the third direction.

16. The battery pack according to claim 15, wherein: The battery cell (210) is a cylindrical battery, and the axial direction of the cylindrical battery is parallel to the second direction.

17. The battery pack according to claim 16, wherein: The battery cells (210) of two adjacent rows of battery rows (220) are staggered one by one in the third direction.

18. The battery pack according to any one of claims 15 to 17, wherein: The battery pack (200) further comprises a mounting bracket (600), wherein the mounting bracket (600) is provided on at least one of the two sides of the plurality of battery rows (220) in the first direction, the mounting bracket (600) is sealedly connected to the corresponding first cavity wall (111), and a plurality of mounting grooves (610) arranged in sequence along the third direction are formed on a side of the mounting bracket (600) facing the battery row (220), and the plurality of battery cells (210) of the battery row (220) are respectively limitedly fitted in the corresponding mounting grooves (610).

19. The battery pack according to claim 18, wherein: The mounting brackets (600) are respectively provided on both sides of the multiple rows of battery rows (220) in the first direction, and the mounting brackets (600) on both sides of the multiple rows of battery rows (220) in the first direction are fixedly connected.

20. The battery pack according to any one of claims 15 to 19, wherein: It also includes a heat exchange component (700), which is arranged between two adjacent rows of battery rows (220) and performs heat exchange with the two adjacent rows of battery rows (220).

21. The battery pack according to claim 20, wherein: The heat exchange element (700) is fixedly connected to each of the battery cells (210) in two adjacent rows of battery rows (220).

22. The battery pack according to claim 20 or 21, wherein: The battery cells (210) are cylindrical batteries, the axial direction of the cylindrical batteries is parallel to the second direction, the battery cells (210) of two adjacent rows of battery rows (220) are staggered one by one in the third direction, the heat exchange element (700) comprises a plurality of first protrusions (710) and a plurality of second protrusions (720), the plurality of first protrusions (710) and the plurality of second protrusions (720) are alternately arranged one by one along the third direction, the first protrusions (710) protrude toward one of the two adjacent rows of battery rows (220), and the second protrusions (720) protrude toward the other of the two adjacent rows of battery rows (220).

23. An electrical device, wherein: Comprising a battery pack according to any one of claims 1-22.

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