Battery pack and electrical device having it

Abstract

This invention discloses a battery pack and an electrical device having the same. The battery pack has a housing cavity within its outer casing, with opposing cavity walls. The housing cavity contains at least two spaced-apart battery packs, each comprising multiple individual battery cells. A heat-insulating structure is sealed to the two first cavity walls and includes a first heat-insulating element and a second heat-insulating element. The first heat-insulating element separates the space between two adjacent battery packs into two discharge channels, each communicating with a pressure relief structure of an individual battery cell in an adjacent battery pack. At least one end of the first heat-insulating element in a first direction has a second heat-insulating element, which is sandwiched between the first cavity wall and the battery pack. This battery pack, in accordance with the present invention, allows for independent pressure relief and heat dissipation between adjacent battery packs while simplifying the battery pack structure and limiting the adhesive thickness between the first cavity wall and the battery pack, thus ensuring the connection between the first cavity wall and the battery pack.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack and an electrical device having the same. Background Technology

[0002] As an important component of electrical devices, the safety performance of battery packs is extremely important.

[0003] In the prior art, in order to avoid thermal runaway of the battery pack and reduce the safety of battery pack use, a pressure relief structure is usually set on the battery cell. During the use of the battery pack, if the internal pressure of the battery cell increases to a certain level, the pressure relief structure can be opened. 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.

[0004] However, when the individual cells in the existing battery pack are depressurized, they can easily affect adjacent battery packs, which can lead to a chain reaction of uncontrollable failures in the adjacent battery packs, reducing the safety of the battery pack. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that, while preventing adjacent battery packs from affecting each other during pressure relief, also simplifies the battery pack's structure, thus solving the technical problem in the prior art where individual battery cells within a battery pack easily affect adjacent battery packs during pressure relief.

[0006] The present invention also aims to provide an electrical device having the above-described battery pack.

[0007] According to an embodiment of the present invention, a battery pack includes: a housing, wherein at least one receiving cavity is formed within the housing, the receiving cavity having two first cavity walls disposed opposite to each other along a first direction; a battery pack, wherein at least one receiving cavity is provided with at least two sets of battery packs spaced apart along a second direction, each set of battery packs including a plurality of battery cells, the first direction intersecting the second direction; a first heat insulation structure, wherein the first heat insulation structure is respectively sealed and connected to the two first cavity walls at both ends in the first direction, and the first heat insulation structure includes a first heat insulation member and a second heat insulation member connected together, the first heat insulation member being spaced apart between two adjacent sets of battery packs to separate the space between the two adjacent sets of battery packs into a first discharge channel and a second discharge channel, the first discharge channel communicating with a pressure relief structure of at least one battery cell in one of the two adjacent sets of battery packs, the second discharge channel communicating with a pressure relief structure of at least one battery cell in the other of the two adjacent sets of battery packs, at least one of the two ends of the first heat insulation member being provided with at least one second heat insulation member, the second heat insulation member being sandwiched between the first cavity wall and the battery packs that are glued and fixed to the first cavity wall by an adhesive.

[0008] According to an embodiment of the present invention, the battery pack, by providing a first heat insulation structure and using a first heat insulation component of the first heat insulation structure to separate the space between two adjacent battery packs into a first discharge channel and a second discharge channel, allows the two adjacent battery packs to release pressure independently through the first and second discharge channels respectively when pressure is released. This avoids, to a certain extent, the impact of one battery pack on the other adjacent battery pack when pressure is released, thereby preventing a chain reaction of uncontrollable events when multiple battery packs are released for heat dissipation, and improving the safety of the battery pack. At the same time, at least one second heat insulation component is provided at at least one end of the first heat insulation component in the first direction, and the second heat insulation component is sandwiched between the first cavity wall and the battery pack which is glued to the first cavity wall by an adhesive component. This facilitates the sealing connection between the first heat insulation component and the first cavity wall using the second heat insulation component, and also limits the adhesive thickness between the first cavity wall and the battery pack, ensuring the fixed connection between the first cavity wall and the battery pack, improving the connection strength between the first cavity wall and the battery pack, and thus making the battery pack structure stable. In other words, the battery pack of this application can not only depressurize, but also avoid mutual interference between adjacent battery packs during the depressurization process. At the same time, it can simplify the structure of the battery pack and ensure the fixed connection between the first cavity wall and the battery pack.

[0009] In some embodiments, the first heat insulation member has a second heat insulation member at one of its two ends in the first direction, and the ends of the first heat insulation member and the second heat insulation member that are far apart from each other are respectively sealed to the corresponding first cavity wall.

[0010] In some embodiments, the end of the first heat insulation member away from the second heat insulation member is inserted into a slot corresponding to the first cavity wall.

[0011] In some embodiments, the first heat insulation member is provided with two second heat insulation members at one end in the first direction, and the two second heat insulation members are respectively located on both sides of the first heat insulation member in the second direction.

[0012] In some embodiments, the second heat insulation element is connected to the corresponding battery pack.

[0013] In some embodiments, in the second direction, the overlap length L between the second heat insulation member and the battery pack is greater than 10 mm.

[0014] In some embodiments, the first heat insulation member is formed as a plate structure and the thickness of the first heat insulation member is t≥1mm; and / or, the second heat insulation member is formed as a plate structure and the thickness of the second heat insulation member is T≥1mm.

[0015] In some embodiments, at least one of two adjacent sets of battery packs 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.

[0016] In some embodiments, all the pressure relief structures of at least one group of the battery packs are respectively disposed on both sides of the battery pack in the second direction, and the receiving cavity also has two second cavity walls disposed opposite to each other in the second direction. The battery packs and the second cavity walls are spaced apart so that a third discharge channel is provided between the battery packs and the second cavity walls. The third discharge channel communicates with a portion of the pressure relief structures of the battery packs adjacent to the second cavity walls.

[0017] In some embodiments, the battery pack adjacent to the second cavity wall is sealed to both of the first cavity walls; and / or, the battery pack further includes a second heat insulation structure, at least partially disposed between the battery pack and the second cavity wall and separating the space between the battery pack and the second cavity wall to form the third discharge channel.

[0018] In some embodiments, the receiving cavity further has two third cavity walls disposed opposite each other along a third direction, and at least one of the third cavity walls has a fourth discharge channel formed therein, and at least one of the first discharge channel, the second discharge channel and the third discharge channel is in communication with the fourth discharge channel, and the first direction and the second direction are respectively perpendicular to the third direction.

[0019] In some embodiments, the battery pack further includes a second thermal insulation structure that is sealed to at least one of the two first cavity walls, such that at least one of the two first cavity walls participates in defining the third emission passage.

[0020] In some embodiments, the second heat insulation structure includes a third heat insulation element, which is fixed to the second cavity wall and sealed to the two first cavity walls respectively.

[0021] In some embodiments, the pressure relief structures of two adjacent electrically connected battery cells of the at least one group of battery packs are respectively disposed on both sides of the battery pack in the second direction, and the terminals of two adjacent electrically connected battery cells of the at least one group of battery packs are respectively disposed on both sides of the battery pack in the second direction.

[0022] In some embodiments, the battery pack includes multiple rows of battery bars arranged sequentially along the first direction, each row of the battery bars including multiple battery cells arranged sequentially along a third direction, the first direction and the second direction being perpendicular to the third direction.

[0023] In some embodiments, the battery cell is a cylindrical battery, and the axial direction of the cylindrical battery is parallel to the second direction.

[0024] In some embodiments, the individual battery cells in two adjacent rows of battery banks are staggered one by one in the third direction.

[0025] In some embodiments, the battery pack further includes a mounting bracket, and the mounting bracket is provided on at least one side of the multiple rows of battery packs in the first direction. The mounting bracket is sealed to the corresponding first cavity wall. The side of the mounting bracket facing the battery pack has a plurality of mounting grooves arranged sequentially along the third direction. The plurality of battery cells of the battery pack are respectively limited and fitted into the corresponding mounting grooves.

[0026] In some embodiments, the mounting brackets are respectively provided on both sides of the multiple rows of battery packs in the first direction, and the mounting brackets on both sides of the multiple rows of battery packs in the first direction are fixedly connected.

[0027] In some embodiments, the battery pack further includes a heat exchanger disposed between two adjacent rows of battery cells and exchanging heat with the two adjacent rows of battery cells.

[0028] In some embodiments, the heat exchanger is fixedly connected to each of the battery cells in two adjacent rows of battery banks.

[0029] In some embodiments, the battery cell is a cylindrical battery with its axial direction parallel to the second direction. The battery cells in two adjacent rows of battery cells are staggered in the third direction. The heat exchanger includes a plurality of first protrusions and a plurality of second protrusions, which are alternately arranged along the third direction. The first protrusions protrude toward one of the two adjacent rows of battery cells, and the second protrusions protrude toward the other of the two adjacent rows of battery cells.

[0030] An electrical device according to an embodiment of the present invention includes the aforementioned battery pack.

[0031] According to embodiments of the present invention, the electrical device improves the safety of use by employing the aforementioned battery pack.

[0032] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is an exploded view of a battery pack according to some embodiments of the present invention.

[0035] Figure 2 This is a top view of a battery pack according to some embodiments of the present invention, with some structural elements omitted.

[0036] Figure 3 for Figure 2 A sectional view along line AA.

[0037] Figure 4 for Figure 3 A magnified view of a portion of region I.

[0038] Figure 5 for Figure 3 A magnified view of a portion of region II in the middle.

[0039] Figure 6 This is an exploded view of the battery pack of some embodiments of the present invention after the outer casing has been removed.

[0040] Figure 7 This is an exploded view of the battery pack and mounting bracket according to some embodiments of the present invention.

[0041] Figure 8 This is a partially enlarged view of two adjacent rows of battery packs in some embodiments of the present invention.

[0042] Figure label:

[0043] 1000, battery pack;

[0044] 100. Outer shell;

[0045] 110. Receiving cavity;

[0046] 111, First cavity wall; 1111, Slot;

[0047] 112. Second cavity wall;

[0048] 113. The third cavity wall;

[0049] 120. Base;

[0050] 130. Top cover;

[0051] 140. Protective plate;

[0052] 200. Battery pack;

[0053] 210. Battery cell; 211. Pressure relief structure;

[0054] 220. Battery pack;

[0055] 600. Mounting bracket; 610. Mounting slot;

[0056] 300. First thermal insulation structure; 310. First thermal insulation component; 320. Second thermal insulation component;

[0057] 400. Second thermal insulation structure; 410. Third thermal insulation component;

[0058] 510, First emission channel; 520, Second emission channel; 530, Third emission channel;

[0059] 700. Heat exchanger; 710. First protrusion; 720. Second protrusion; 730. Conveying component;

[0060] 810. First connecting member; 820. Second connecting member; 830. Third connecting member; 840. Sealing element;

[0061] 900. Battery Management System. Detailed Implementation

[0062] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] The battery pack 1000 of the present invention is described below with reference to the accompanying drawings.

[0065] Combination Figure 1 and Figure 2 As shown, the battery pack 1000 according to an embodiment of the present invention includes: a housing 100, a battery pack 200, and a first heat insulation structure 300.

[0066] Among them, combined Figure 2 , Figure 3 and Figure 4 As shown, at least one receiving cavity 110 is formed within the outer casing 100, and the receiving cavity 110 has two first cavity walls 111 disposed opposite to each other along a first direction. This means that one or more receiving cavities 110 are formed within the outer casing 100, and each receiving cavity 110 has two first cavity walls 111 disposed opposite to each other in the first direction.

[0067] It should be noted that the "first direction" mentioned here can be understood as... Figure 1 As shown in the X direction, that is, the receiving cavity 110 has two first cavity walls 111 arranged opposite to each other along the X direction.

[0068] In a specific example, the X direction is the vertical direction of the battery pack 1000, and the two first cavity walls 111 arranged opposite to each other along the X direction are respectively formed as the upper side wall and the lower side wall of the receiving cavity 110.

[0069] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0070] Combination Figure 1 , Figure 2 and Figure 3As shown, at least one receiving cavity 110 is provided with at least two sets of battery packs 200 spaced apart along a second direction. Each battery pack 200 includes multiple battery cells 210. The first direction intersects the second direction. This means that at least two sets of battery packs 200 are provided within at least one receiving cavity 110 inside the housing 100. The at least two sets of battery packs 200 are spaced apart along the second direction of the housing 100 to optimize the use of space within the receiving cavity 110, ensuring that at least two sets of battery packs 200 can be simultaneously housed within the same receiving cavity 110. Furthermore, each battery pack 200 is configured to include multiple battery cells 210 to guarantee the number of battery cells 210 within the receiving cavity 110, thereby ensuring the capacity of the battery pack 1000.

[0071] It should be noted that the second direction mentioned here can be understood as... Figure 1 The Y direction is shown in the diagram.

[0072] In the specific example, the Y direction is the left and right direction of battery pack 1000.

[0073] Meanwhile, the above-mentioned arrangement also allows the battery pack 200 to be housed inside the housing 100, so that the housing 100 can 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 housing 100 can also support the battery pack 200, which can ensure the positional stability of the battery pack 200 to a certain extent and help ensure the working performance of the battery pack 200.

[0074] In some embodiments, one end of the receiving cavity 110 is open so that the battery pack 200 can be placed in the receiving cavity 110 by means of the opening, thereby reducing the assembly difficulty of the battery pack 200 and making it easier to support and protect the battery pack 200 by means of the outer casing 100.

[0075] Combination Figure 3 and Figure 4As shown, the first heat insulation structure 300 is sealed and connected to two first cavity walls 111 at both ends in the first direction. The first heat insulation structure 300 includes a first heat insulation element 310 and a second heat insulation element 320 connected together. The first heat insulation element 310 is spaced between two adjacent battery packs 200 to separate the space between the two adjacent battery packs 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 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 end of the first heat insulation element 310 in the first direction is provided with at least one second heat insulation element 320. The second heat insulation element 320 is sandwiched between the first cavity wall 111 and the battery pack 200 that is glued and fixed to the first cavity wall 111 by an adhesive. This can also be understood as follows: by sealing the two ends of the first heat insulation structure 300 in the first direction to the two first cavity walls 111 respectively, and by spaced the first heat insulation element 310 of the first heat insulation structure 300 between the two adjacent battery packs 200, the space between the two adjacent battery packs 200 can be separated into an independent first emission channel 510 and a second emission channel 520, thereby reducing the molding difficulty of the first emission channel 510 and the second emission channel 520.

[0076] Meanwhile, in two adjacent battery packs 200, the pressure relief structure 211 of at least one battery cell 210 in one battery pack 200 is connected to the first discharge channel 510, and the pressure relief structure 211 of at least one battery cell 210 in 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 (first discharge channel 510 or second discharge channel 520), and then the pressure is discharged through the discharge channel, thereby reducing the difficulty of depressurizing the battery cell 210 and ensuring the safety of the battery cell 210 in use, which in turn ensures the safety of the battery pack 1000 in use.

[0077] In addition, the above settings allow each of the two adjacent battery packs 200 to release pressure through a separate discharge channel during heat dissipation and pressure relief, thereby avoiding mutual interference between the two adjacent battery packs 200 during pressure relief and further ensuring the safety of the battery pack 1000.

[0078] In other words, the battery pack 200 of this application can not only be depressurized smoothly, but also avoid mutual interference between adjacent battery packs 200 during depressurization.

[0079] In some embodiments, at least one battery cell 210 of one battery pack 200 has a pressure relief structure 211 facing the first discharge channel 510, and at least one battery cell 210 of another battery pack 200 has a pressure relief structure 211 facing the second discharge channel 520. This enables the pressure relief structure 211 to be connected to the discharge channel and reduces the difficulty of connecting the pressure relief structure 211 to the discharge channel. This ensures that the pressure discharged through the pressure relief structure 211 can be directly discharged into the discharge channel, reducing the difficulty of pressure relief. At the same time, it also allows adjacent battery packs 200 to be independent of each other when pressure is relieved, avoiding the battery packs 200 from affecting each other and causing a chain reaction of loss of control when pressure is relieved, thus improving the safety of the battery pack 1000.

[0080] It should be noted that the aforementioned pressure relief structure 211 can be understood as an explosion-proof valve. The explosion-proof valve is used to open when the internal pressure of the battery cell 210 exceeds a preset value, thereby achieving the purpose of pressure relief. The explosion-proof valve is existing technology well-known to those skilled in the art, and its specific structure will not be described in detail here.

[0081] It should also be noted that by sealing the two ends of the first heat 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, which reduces the molding difficulty of the first discharge channel 510 and the second discharge channel 520. At the same time, it can also avoid setting separate structural components to form the first discharge channel 510 and the second discharge channel 520, reducing the number of structural components of the battery pack 1000, thereby simplifying the structure of the battery pack 1000, reducing the manufacturing cost of the battery pack 1000, improving the space utilization of the battery pack 1000, and helping to achieve the lightweighting of the battery pack 1000.

[0082] In addition, the first heat insulation structure 300 can be supported by the two first cavity walls 111, eliminating the need to set up a support member for the first heat insulation structure 300 in the battery pack 1000, thereby further simplifying the structure of the battery pack 1000 and ensuring the positional stability of the first heat insulation structure 300, thus ensuring the working performance of the first heat insulation structure 300.

[0083] The aforementioned sealing connection can be formed by bonding, abutting, or snapping. While enabling the first heat insulation structure 300 and the first cavity wall 111 to form a fixed connection, the sealing connection can also ensure the sealing of the first discharge channel 510 and the second discharge channel 520 to a certain extent, thereby avoiding mutual interference between the two adjacent battery packs 200 when depressurizing, and ensuring the safety of the battery pack 1000.

[0084] Furthermore, this application provides at least one second heat insulation member 320 at at least one of the two ends of the first heat insulation member 310 in the first direction, and sandwiches the second heat insulation member 320 between the first cavity wall 111 and the battery pack 200 which is glued and fixed to the first cavity wall 111 by an adhesive. This means that the battery pack 200 is glued and fixed to the first cavity wall 111 by an adhesive, and the second heat insulation member 320 is sandwiched between the first cavity wall 111 and the battery pack 200. In this way, not only can the second heat insulation member 320 be used to achieve a sealed connection between the first heat insulation structure 300 and the first cavity wall 111, but the second heat 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, so as to avoid the connection strength between the first cavity wall 111 and the battery pack 200 being low due to the adhesive being too thin.

[0085] In other words, while ensuring that the first heat insulation structure 300 and the first cavity wall 111 can form a sealed connection, the second heat insulation component 320 can also enable the first cavity wall 111 and the battery pack 200 to form a stable fixed connection, thereby improving the positional stability of the battery pack 200.

[0086] The adhesive components mentioned here can be understood as glue or solid glue, etc.

[0087] As can be seen from the above structure, the battery pack 1000 of this embodiment of the invention, by setting a first heat insulation structure 300 and using the first heat insulation member 310 of the first heat 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, can effectively depressurize the battery pack 200 when thermal runaway occurs, while also allowing two adjacent battery packs 200 to depressurize independently, so as to a certain extent avoid the impact of one battery pack 200 on the adjacent battery pack 200 when depressurizing, thereby improving the safety of the battery pack 1000.

[0088] Meanwhile, the two ends of the first heat insulation structure 300 in the first direction are respectively sealed and connected to the two first cavity walls 111, so that the first discharge channel 510 and the second discharge channel 520 are defined by the two first cavity walls 111. This reduces the molding difficulty of the first discharge channel 510 and the second discharge channel 520, and also reduces the number of structural components of the battery pack 1000, thereby simplifying the structure of the battery pack 1000 and reducing the manufacturing cost of the battery pack 1000.

[0089] Furthermore, at least one second heat insulation member 320 is provided at at least one of the two ends in the first direction of the first heat insulation member 310. The second heat insulation member 320 is sandwiched between the first cavity wall 111 and the battery pack 200, so as to achieve a sealed connection between the first heat insulation structure 300 and the first cavity wall 111 using the second heat insulation member 320. While reducing the connection strength between the first heat insulation structure 300 and the first cavity wall 111, it can also ensure the connection area between the first heat insulation structure 300 and the first cavity wall 111, thereby improving the connection strength. At the same time, the second heat insulation member 320 can also limit the thickness of the adhesive between the first cavity wall 111 and the battery pack 200, so as to avoid the connection strength between the first cavity wall 111 and the battery pack 200 being low due to the thin adhesive.

[0090] In other words, the battery pack 1000 of this application not only reduces the difficulty of depressurizing the battery pack 200, but also avoids mutual interference between adjacent battery packs 200 during the depressurization process. At the same time, it can simplify the structure of the battery pack 1000, ensure the assembly quality of the battery pack 1000, reduce the manufacturing cost of the battery pack 1000, and improve the space utilization of the battery pack 1000.

[0091] Understandably, compared to the prior art, this application provides a first heat insulation structure 300 between two adjacent battery packs 200 to form an independent first discharge channel 510 and a second discharge channel 520 between the two adjacent battery packs 200. The first cavity wall 111 of the outer casing 100 is configured to participate in defining the first discharge channel 510 and the second discharge channel 520. This avoids mutual interference between the two adjacent battery packs 200 when depressurizing, while also reducing the molding difficulty of the first discharge channel 510 and the second discharge channel 520, simplifying the structure of the battery pack 1000, reducing the manufacturing cost of the battery pack 1000, reducing the weight of the battery pack 1000, and improving the space utilization of the battery pack 1000.

[0092] It should be noted that in the battery pack 1000, multiple battery cells 210 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 210 are connected in both series and parallel.

[0093] In some embodiments, such as Figure 4 As shown, the first emission channel 510 and the second emission channel 520 are respectively located on opposite sides of the first heat insulation member 310 in the second direction. This reduces the molding difficulty of the first emission channel 510 and the second emission channel 520, and also avoids setting emission channels inside the first heat insulation member 310. This helps to reduce the thickness of the first heat insulation member 310, reduce the manufacturing cost of the first heat insulation member 310, and also reduce the weight of the first heat insulation member 310, achieving lightweighting of the first heat insulation member 310, and also improving the space utilization of the battery pack 1000.

[0094] In some embodiments, the first heat insulation element 310 is a mica plate. The mica plate has a high melting point, which can prevent the heat discharged by the battery pack 200 from breaking down the first heat insulation element 310, thereby improving the heat insulation performance of the first heat insulation element 310. This, to a certain extent, prevents the two adjacent battery packs 200 from affecting each other when depressurizing, and ensures the safety of the battery pack 1000.

[0095] In some embodiments, such as Figure 1 As shown, the housing 100 includes a base 120 and a top cover 130. The top cover 130 is connected to the base 120 to form a receiving cavity 110 inside the housing 100, reducing the molding difficulty of the receiving cavity 110 and also reducing the assembly difficulty of the battery pack 200, so as to ensure that the battery pack 200 can be effectively placed in the receiving cavity 110.

[0096] Optionally, such as Figure 1 As shown, the base 120 can be a hollow structure with one end open, and the top cover 130 can be a plate-like structure. The top cover 130 covers the open side of the base 120 so that the base 120 and the top cover 130 together define the receiving cavity 110; or, the base 120 and the top cover 130 can both be hollow structures with one side open (not shown in this example figure), and the open side of the top cover 130 covers the open side of the base 120 so that the base 120 and the top cover 130 together define the receiving cavity 110.

[0097] Of course, the outer shell 100 formed by the base 120 and the top cover 130 can be of various shapes, such as a cylinder or a cuboid.

[0098] In some embodiments, the base 120 and the top cover 130 are disposed opposite to each other in a first direction. The side wall of the base 120 facing the top cover 130 is formed as one of the first cavity walls 111 of the receiving cavity 110, and the side wall of the top cover 130 facing the base 120 is formed as the other first cavity wall 111 of the receiving cavity 110, so that each receiving cavity 110 has two first cavity walls 111 and the two first cavity walls 111 are disposed opposite to each other in the first direction, thereby reducing the molding difficulty of the two first cavity walls 111 of the receiving cavity 110.

[0099] Optionally, such as Figure 1 As shown, a sealing element 840 is provided between the base 120 and the top cover 130. The sealing element 840 is used to achieve a sealed connection between the base 120 and the top cover 130. In this way, while ensuring the sealing performance of the receiving cavity 110, the base 120 and the top cover 130 can also form a fixed connection, thereby improving the structural stability of the outer shell 100 and reducing the connection difficulty between the base 120 and the top cover 130.

[0100] In some embodiments, the seal 840 is formed as a sealant, thereby facilitating the sealing and fixing connection between the base 120 and the top cover 130 using the seal 840.

[0101] In some embodiments, such as Figure 1 As shown, the housing 100 also includes a protective plate 140, which is located on the outside of the base 120 to protect the housing 100 and extend its service life.

[0102] In some embodiments, such as Figure 1 As shown, the battery pack 1000 also includes a battery management system 900, which is located in one of the receiving cavities 110. The battery management system 900 is used to monitor the status of the battery cells 210 and ensure the working performance and safety of the battery cells 210.

[0103] In some embodiments, when the first heat insulation structure 300 is sealed to the two first cavity walls 111 at both ends in the first direction, adjacent battery packs 200 are also sealed to the two first cavity walls 111. This means that when the first heat insulation structure 300 is sealed to the two first cavity walls 111, adjacent battery packs 200 are also sealed to the two first cavity walls 111. This prevents, to a certain extent, the pressure discharged into the first discharge channel 510 and the second discharge channel 520 from being discharged between the battery pack 200 and the corresponding first cavity wall 111, thereby ensuring that the pressure discharged into the first discharge channel 510 and the second discharge channel 520 can be discharged along a predetermined route, thus ensuring the safety of the battery pack 1000 in use.

[0104] Furthermore, by sealing two adjacent battery packs 200 to the two first cavity walls 111 and sealing the first heat insulation structure 300 to the two first cavity walls 111, the two first cavity walls 111 can be used to support the battery pack 200 and the first heat insulation structure 300, thereby reducing the difficulty of fixing the battery pack 200 and the first heat insulation structure 300, improving the structural stability of the battery pack 200 and the first heat insulation structure 300, and to a certain extent preventing the battery pack 200 and the first heat insulation structure 300 from shaking, thus ensuring the working performance of the battery pack 200 and the first heat insulation structure 300.

[0105] In some embodiments, the battery pack 200 is connected to the first cavity wall 111 by an adhesive connector, so as to seal the battery pack 200 to the two first cavity walls 111, reduce the difficulty of connecting the battery pack 200 to the first cavity wall 111 and ensure the connection quality of the battery pack 200 to the first cavity wall 111.

[0106] In some embodiments, such as Figure 4As shown, the second heat insulation element 320 is bent and connected to the first heat insulation element 310 and sealed to the first cavity wall 111. In this way, the second heat insulation element 320 can be used to achieve a sealed connection between the first heat insulation element 310 and the first cavity wall 111. This allows the first cavity wall 111 to support the first heat insulation element 310 while also enabling the first cavity wall 111 of the outer shell 100 to participate in defining the first discharge channel 510 and the second discharge channel 520, reducing the molding difficulty of the first discharge channel 510 and the second discharge channel 520.

[0107] Optionally, combined Figure 2 , Figure 3 and Figure 4 As shown, the second heat insulation member 320 extends along the second direction to facilitate the bending connection between the second heat insulation member 320 and the first heat insulation member 310 and the sealing connection with the first cavity wall 111, thereby reducing the difficulty of fixing the second heat insulation member 320.

[0108] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, the first heat insulation member 310 has a second heat insulation member 320 at one of its two ends in the first direction, and the ends of the first heat insulation member 310 and the second heat insulation member 320 that are far apart from each other are respectively sealed and connected to the corresponding first cavity wall 111. In other words, the end of the first heat insulation component 310 away from the second heat insulation component 320 is sealed to the corresponding first cavity wall 111, and the end of the second heat insulation component 320 away from the first heat insulation component 310 is sealed to the corresponding first cavity wall 111. This allows the two ends of the first heat insulation structure 300 in the first direction to be sealed to the two first cavity walls 111 respectively, so as to separate the space between two adjacent battery packs 200 into a first discharge channel 510 and a 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, reducing the molding difficulty of 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 components of the battery pack 1000 can also be reduced, thereby simplifying the structure of the battery pack 1000 and reducing the manufacturing cost of the battery pack 1000.

[0109] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4As shown, the end of the first heat insulation member 310 away from the second heat insulation member 320 is inserted into the slot 1111 on the corresponding first cavity wall 111. That is, one end of the first heat insulation member 310 is sealed to the first cavity wall 111 through the second heat insulation member 320, and the other end of the first heat insulation member 310 is inserted into the slot 1111 on the corresponding first cavity wall 111. This allows both ends of the first heat insulation member 310 to form a sealed connection with the first cavity wall 111, and also reduces the difficulty of fixing the first heat insulation structure 300.

[0110] In some embodiments, such as Figure 4 As shown, one of the two first cavity walls 111 is provided with two protrusions, and a slot 1111 is formed between the two protrusions. In this way, while realizing the insertion and cooperation between the first heat insulation component 310 and one of the first cavity walls 111, the molding difficulty of the slot 1111 can also be reduced, and the structural strength of the first cavity wall 111 can be reduced due to the setting of the slot 1111, thus extending the service life of the outer shell 100.

[0111] The sealing connection between the second heat insulation component 320 and the first cavity wall 111 can be formed by bonding, abutting or other connection methods.

[0112] In a specific example, with the above settings, after the two adjacent battery packs 200 are assembled, one end of the first heat insulation member 310, which is inserted into the first cavity wall 111, can be inserted between the two adjacent battery packs 200 and into the slot 1111 on the first cavity wall 111. Then, the second heat insulation member 320, which is provided on the other end of the first heat insulation member 310, is sealed to the first cavity wall 111 to fix the first heat insulation structure 300. This achieves the purpose of using the first heat insulation structure 300 to separate the space between the two adjacent battery packs 200 into independent first discharge channels 510 and second discharge channels 520, which to a certain extent avoids the two adjacent battery packs 200 from affecting each other when depressurizing, and ensures the safety of the battery pack 1000.

[0113] In some embodiments, such as Figure 4 As shown, the first heat insulation member 310 has two second heat insulation members 320 at one end in the first direction, and the two second heat insulation members 320 are respectively located on both sides of the first heat insulation member 310 in the second direction. That is, the two second heat insulation members 320 are respectively located on both sides of the first heat insulation member 310 in the second direction. The cooperation of the two second heat insulation members 320 can increase the connection strength between the first heat insulation member 310 and the first cavity wall 111, so that the position of the first heat insulation structure 300 is stable, so as to avoid the mutual interference of two adjacent battery packs 200 when the pressure is released.

[0114] In some embodiments, the two second heat insulation elements 320 are formed as a single piece to reduce the molding difficulty of the two second heat insulation elements 320. At the same time, it can also reduce the connection difficulty between the two second heat insulation elements 320 and the first heat insulation element 310, making it easier to use the second heat insulation elements 320 to increase the connection strength between the first heat insulation element 310 and the first cavity wall 111, and improve the positional stability of the first heat insulation structure 300.

[0115] Optionally, the first heat insulation structure 300 is formed as a single piece, which eliminates the need for the connection between the second heat insulation component 320 and the first heat insulation component 310. This reduces the molding difficulty of the first heat insulation structure 300 while ensuring the connection quality between the second heat insulation component 320 and the first heat insulation component 310, thereby improving the structural stability of the first heat insulation structure 300 and ensuring its working performance.

[0116] In some embodiments, such as Figure 4 As shown, the second heat insulation element 320 is sandwiched between the battery pack 200 and the first cavity wall 111 and is connected to the corresponding battery pack 200. That is to say, the second heat insulation element 320 is not only sealed to the first cavity wall 111, but also connected to the battery pack 200, so that the first cavity wall 111 and the battery pack 200 cooperate to support the second heat insulation element 320, thereby improving the positional stability of the second heat insulation element 320, thereby improving the positional stability of the first heat insulation structure 300 and ensuring the working performance of the first heat insulation structure 300.

[0117] It should be noted that when the second heat insulation component 320 is sandwiched between the battery pack 200 and the first cavity wall 111 and connected to the battery pack 200, by respectively placing the two second heat insulation components 320 on both sides of the first heat insulation component 310 in the second direction, the two second heat insulation components 320 can be respectively connected to the two adjacent battery packs 200, so that the position of the first heat insulation structure 300 relative to the two adjacent battery packs 200 is stable. This is beneficial to use the first heat insulation structure 300 to avoid mutual interference between the two adjacent battery packs 200 when depressurization occurs, thus ensuring the safety of the battery pack 1000.

[0118] In some embodiments, combined with Figure 6 and Figure 7 As shown, the battery pack 200 includes mounting brackets 600 spaced apart on both sides in a first direction. The second heat insulation component 320 is sealed to the mounting brackets 600, thereby achieving the connection between the second heat insulation component 320 and the battery pack 200. This reduces the difficulty of connecting the second heat insulation component 320 to the battery pack 200, and also avoids damage to the battery cell 210 when the second heat insulation component 320 is 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.

[0119] In some embodiments, the second heat insulation component 320 is bonded to the mounting bracket 600 of the battery pack 200 and the first cavity wall 111 respectively, thereby achieving a sealed connection between the second heat insulation component 320 and the battery pack 200 and the first cavity wall 111, reducing the difficulty of connecting the second heat insulation component 320 to the battery pack 200 and the first cavity wall 111, while ensuring the connection strength between the second heat insulation component 320 and the battery pack 200 and the first cavity wall 111.

[0120] In some embodiments, such as Figure 4 As shown, in the second direction, the overlap length L between the second heat insulation member 320 and the battery pack 200 is greater than 10 mm. This ensures the overlap area between the second heat insulation member 320 and the battery pack 200, thereby ensuring the connection strength between the second heat insulation member 320 and the battery pack 200. This allows the second heat insulation member 320 to be stably clamped between the battery pack 200 and the first cavity wall 111, thereby improving the structural stability of the first heat insulation structure 300, ensuring the working performance of the first heat insulation structure 300, and ensuring the connection quality between the battery pack 200 and the first cavity wall 111.

[0121] In a specific example, in the second direction, the overlap length L between the second heat insulation element 320 and the battery pack 200 is 11mm, 12mm, 13mm, 14mm, 15mm or 20mm, etc.

[0122] In some embodiments, such as Figure 4 As shown, the first heat insulation component 310 is formed into a plate-like structure, and the thickness of the first heat insulation component 310 is t≥1mm. By forming the first heat insulation component 310 into a plate-like structure, the molding difficulty of the first heat insulation component 310 can be reduced. By setting the thickness of the first heat insulation component 310 to t≥1mm, the structural strength of the first heat insulation component 310 can be improved while ensuring its heat insulation performance. This avoids mutual interference between adjacent battery packs 200 during pressure relief, ensuring the safety of the battery pack 1000 in use.

[0123] In a specific example, the thickness T of the first heat insulation element 310 is 1 mm, 2 mm, or 3 mm, etc.

[0124] In some embodiments, the thickness of the first heat insulation element 310 is 1mm to 2mm. This not only achieves heat insulation using the first heat insulation element 310, but also reduces the thickness of the first heat insulation element 310, thereby reducing the manufacturing cost of the first heat insulation element 310. At the same time, it also reduces the weight of the first heat insulation element 310, achieving lightweighting of the first heat insulation element 310, and also reduces the space occupied by the first heat insulation element 310, improving the space utilization rate of the battery pack 1000.

[0125] In some embodiments, such as Figure 4As shown, the second heat insulation element 320 is formed into a plate-like structure, and the thickness T of the second heat insulation element 320 is ≥ 1 mm. By forming the second heat insulation element 320 into a plate-like structure, the molding difficulty of the second heat insulation element 320 can be reduced. At the same time, since the second heat insulation element 320 is sandwiched between the battery pack 200 and the first cavity wall 111, and the thickness of the second heat insulation element 320 is limited, the connection thickness between the battery pack 200 and the first cavity wall 111 can be limited, so as to ensure the connection quality between the battery pack 200 and the first cavity wall 111 and improve the positional stability of the battery pack 200.

[0126] In specific examples, the thickness T of the second heat insulation element 320 is 1 mm, 2 mm, or 3 mm, etc.

[0127] In some embodiments, at least one of two adjacent battery packs 200 is adhesively connected to at least one of the two first cavity walls 111. This allows at least one battery pack 200 to be adhesively fitted to the first cavity wall 111, thereby achieving adhesive fit between the battery pack 200 and the housing 100. This ensures that the battery pack 200 is stably disposed within the housing 100, improving the positional stability of the battery pack 200 and ensuring its safety during use, thus guaranteeing the working performance of the battery pack 200.

[0128] In a specific example, two adjacent battery packs 200 are bonded to two first cavity walls 111, which increases the connection strength between the battery pack 200 and the outer shell 100, improves the positional stability of the battery pack 200, and helps to ensure the structural strength of the battery pack 1000.

[0129] Optionally, the first thermal insulation structure 300 is bonded to at least one of the two first cavity walls 111. This achieves 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 connection quality 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, enabling the first thermal insulation structure 300 to be stably installed within the outer casing 100. This improves the positional stability of the first thermal insulation structure 300 and ensures its safety in use, thereby guaranteeing the working performance of the first thermal insulation structure 300.

[0130] In a specific example, the first heat insulation structure 300 is bonded to one of the two first cavity walls 111 and plugged into the other of the two first cavity walls 111. This allows the first heat insulation structure 300 to be fixedly connected to both first cavity walls 111 at the same time, while also reducing the connection difficulty of the first heat insulation structure 300.

[0131] In some embodiments, combined with Figure 2 , Figure 3 and Figure 5 As shown, at least one set of battery pack 200 has all its pressure relief structures 211 respectively disposed on both sides of the battery pack 200 in the second direction. The receiving cavity 110 also has two second cavity walls 112 disposed opposite to each other in 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 walls 112. The third discharge channel 530 is connected to a portion of the pressure relief structures 211 of the battery pack 200 adjacent to the second cavity walls 112. That is to say, the battery pack 200 and the second cavity walls 112 cooperate to form the third discharge channel 530. This reduces the difficulty of forming the third discharge channel 530, while ensuring that the pressure discharged through the pressure relief structure 211 can be discharged into the third discharge channel 530. Then the pressure is discharged through the third discharge channel 530 to achieve the purpose of pressure relief, thereby reducing the pressure relief difficulty of the battery cells 210 and ensuring the safety of the battery cells 210 in use, that is, ensuring the safety of the battery pack 1000 in use.

[0132] Meanwhile, by placing all the pressure relief structures 211 of at least one set of battery packs 200 on both sides of the battery pack 200 in the second direction, it is also convenient to realize the connection between adjacent battery cells 210 in the same set of battery packs 200, reducing the difficulty of connecting battery cells 210.

[0133] In some embodiments, the second cavity wall 112 is made of a heat-insulating material, which can prevent the heat discharged by the battery pack 200 from breaking through the second cavity wall 112 and improve the safety of the battery pack 1000.

[0134] In some embodiments, the battery pack 200 adjacent to the second cavity wall 112 is sealed to the two first cavity walls 111 respectively. This means that when a third discharge 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 sealed to the two first cavity walls 111 respectively. This prevents, to a certain extent, the pressure discharged into the third discharge channel 530 from being discharged between the battery pack 200 and the corresponding first cavity wall 111, thereby ensuring that the pressure discharged into the third discharge channel 530 can be discharged along a predetermined route, guaranteeing the safety of the battery pack 1000 in use.

[0135] In some embodiments, combined with Figure 2 , Figure 3 and Figure 5As shown, the battery pack 1000 also includes a second heat insulation structure 400. At least a portion of the second heat insulation structure 400 is disposed between the battery pack 200 and the second cavity wall 112, and divides the space between the battery pack 200 and the second cavity wall 112 to form a third discharge channel 530. That is to say, it is not limited to using the battery pack 200 and the second cavity wall 112 to form the third discharge channel 530. The second heat insulation structure 400 can also be set between the battery pack 200 and the second cavity wall 112 to define the third discharge channel 530. This can also ensure that the pressure discharged through the pressure relief structure 211 can be discharged into the third discharge channel 530, and then the pressure is discharged through the third discharge channel 530 to achieve the purpose of pressure relief, thereby reducing the difficulty of pressure relief of the battery cell 210, thus ensuring the safety of the battery cell 210 in use, which in turn ensures the safety of the battery pack 1000 in use.

[0136] Meanwhile, by setting the second heat insulation structure 400, the second cavity wall 112 can be made of heat insulation material, thereby reducing the processing difficulty and processing cost of the second cavity wall 112.

[0137] In some embodiments, combined with Figure 1 , Figure 2 and Figure 3 As shown, at least one second cavity wall 112 is provided in the middle of the outer casing 100 in the second direction. This not only enhances the structural strength of the outer casing 100 by utilizing the second cavity wall 112, but also enables the formation of multiple receiving cavities 110 within the outer casing 100, thereby facilitating the placement of multiple battery packs 200 within the outer casing 100 to ensure the capacity of the battery pack 1000.

[0138] In addition, the second cavity wall 112 can also fix the battery pack 200 to improve the structural stability of the battery pack 200 and ensure the working performance of the battery pack 200.

[0139] In some embodiments, the third discharge channel 530 is formed between the battery pack 200 and the second cavity wall 112. This reduces the difficulty of forming the third discharge channel 530 and avoids setting the third discharge channel 530 in the second heat insulation structure 400. This helps to reduce the thickness of the second heat insulation structure 400, reduce the manufacturing cost of the second heat insulation structure 400, and also reduce the weight of the second heat insulation structure 400, achieving lightweighting of the second heat insulation structure 400, and also improving the space utilization of the battery pack 1000.

[0140] In some embodiments, such as Figure 3As shown, the receiving cavity 110 also has two third cavity walls 113 arranged opposite each other along a third direction. At least one third cavity wall 113 has a fourth discharge channel formed within it. At least one of the first discharge channel 510, the second discharge channel 520, and the third discharge channel 530 communicates with the fourth discharge channel. The first and second directions are perpendicular to the third direction, respectively. Here, the third direction can be understood as... Figure 1 In the Z direction shown, by forming a fourth discharge channel in at least one third cavity wall 113, and by configuring at least one of the first discharge channel 510, the second discharge channel 520 and the third discharge channel 530 to communicate with the fourth discharge channel, the pressure discharged into the first discharge channel 510, the second discharge channel 520 and / or the third discharge channel 530 is introduced into the fourth discharge channel, and then the pressure is discharged through the fourth discharge channel to achieve the purpose of pressure relief, thereby ensuring the safety of the battery pack 1000 in use.

[0141] In the specific example, the Z direction is the front-to-back direction of the battery pack 1000.

[0142] In the description of this invention, features defined with "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or importance.

[0143] 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.

[0144] In some embodiments, the outer casing 100 of the battery pack 1000 is provided with a pressure relief valve, which is connected to a 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 in use.

[0145] In some embodiments, at least one third cavity wall 113 is hollow inside, so as to form a fourth emission channel within the third cavity wall 113, thereby reducing the difficulty of forming the fourth emission channel.

[0146] In some embodiments, such as Figure 5As shown, the battery pack 1000 also includes a second heat insulation structure 400, which is sealed 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 emission channel 530. This facilitates the formation of the third emission channel 530 while also allowing the third emission channel 530 to be defined using the structure of the outer casing 100 itself, avoiding the need for a separate structural component to form the third emission channel 530. This reduces the number of structural components in the battery pack 1000, thereby simplifying the structure of the battery pack 1000, reducing its manufacturing cost, improving its space utilization, and contributing to its lightweight design.

[0147] In some embodiments, such as Figure 5 As shown, the second heat insulation structure 400 includes a third heat insulation element 410, which is fixed to the second cavity wall 112 and sealed to the two first cavity walls 111 respectively. This improves the positional stability of the third heat insulation element 410 and allows both first cavity walls 111 of the outer casing 100 to participate in defining the third emission channel 530, thereby reducing the molding difficulty of the third emission channel 530. It also eliminates the need to set structural components defining the third emission channel 530 at both ends in the first direction, further simplifying the structure of the battery pack 1000.

[0148] Meanwhile, by fixing the third heat insulation element 410 to the second cavity wall 112, the second cavity wall 112 can be separated from the battery pack 200 to prevent the heat of the battery pack 200 from being transferred to the second cavity wall 112 when the pressure is released, that is, to prevent the heat from being directly transferred to the outer casing 100, thereby improving the safety of the battery pack 1000.

[0149] In some embodiments, the third heat insulation member 410 is formed as a mica board, which ensures the high temperature resistance of the third heat insulation member 410 while making the third heat insulation member 410 a heat insulation board, thereby ensuring the heat insulation effect of the third heat insulation member 410.

[0150] In some embodiments, the third heat insulation member 410 is bonded to the second cavity wall 112 to achieve a fixed connection between the third heat insulation member 410 and the second cavity wall 112, thereby reducing the difficulty of connecting the third heat insulation member 410 and the second cavity wall 112, while ensuring the connection strength between the third heat insulation member 410 and the second cavity wall 112, ensuring the positional stability of the third heat insulation member 410, and thus ensuring the working performance of the third heat insulation member 410.

[0151] Optionally, the opposite ends of the third heat insulation member 410 are engaged with the two first cavity walls 111 to achieve a sealed connection between the third heat insulation member 410 and the two first cavity walls 111, and reduce the difficulty of connecting the third heat insulation member 410 and the two first cavity walls 111.

[0152] In some embodiments, pressure relief structures 211 of two adjacent electrically connected battery cells 210 of at least one set of battery packs 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 set of battery packs 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 form a series connection, thereby reducing the connection difficulty between two adjacent electrically connected battery cells 210 and thus reducing the assembly difficulty of the battery pack 1000.

[0153] Of course, in some other embodiments, when it is necessary to form a parallel connection between two adjacent electrically connected battery cells 210, the terminals of two adjacent electrically connected battery cells 210 of the same battery pack 200 can also be located on the same side of the battery pack 200 in the second direction. This application does not impose any specific limitations.

[0154] In some embodiments, combined with Figure 1 , Figure 6 and Figure 7 As shown, the battery pack 200 includes multiple rows of battery rows 220 arranged sequentially along a first direction. Each row of battery rows 220 includes multiple battery cells 210 arranged sequentially along a third direction. The first and second directions are perpendicular to the third direction, respectively. This arrangement allows for the rational use of space within the housing 100, enabling the housing 100 to accommodate a larger number of battery cells 210. This facilitates an increase in the capacity of the battery pack 1000 and ensures its operational performance.

[0155] In some embodiments, such as Figure 7 As shown, the battery cell 210 is a cylindrical battery, and the axis of the cylindrical battery is parallel to the second direction. This allows the battery cell 210 to be placed horizontally inside the housing 100. Compared with the prior art where the battery cell 210 is placed vertically inside the housing 100, it is easier to increase the height of the battery pack 1000, thereby facilitating an increase in the number of battery rows 220 and increasing the capacity of the battery pack 1000.

[0156] Meanwhile, by setting the battery cell 210 as a cylindrical battery, the working performance and reliability of the battery cell 210 can be guaranteed to a certain extent, thereby ensuring the working performance of the battery pack 1000.

[0157] Furthermore, 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 positioned directly opposite the discharge channel, reducing the difficulty of pressure relief for the battery cell 210 and ensuring the safety of the battery cell 210 in use.

[0158] In some embodiments, such as Figure 8 As shown, the battery cells 210 of two adjacent rows of battery packs 220 are staggered in the third direction. This staggered arrangement means that the projections of the axes of the battery cells 210 of two adjacent rows of battery packs 220 onto the first cavity wall 111 and / or the second cavity wall 112 do not coincide. This allows the battery cells 210 of one row of battery packs 220 to be positioned directly between two adjacent battery cells 210 of the other row. Since the battery cells 210 are cylindrical, the space between two adjacent battery cells 210 can be utilized more efficiently. This allows a portion of the structure of the battery cells 210 of one row of battery packs 220 to be located between two adjacent battery cells 210 of the other row, thereby reducing the size of the battery pack 1000 in the first direction. This helps to reduce the space occupied by the battery pack 1000 and lower the installation difficulty of the battery pack 1000.

[0159] In some embodiments, combined with Figure 6 and Figure 7 As shown, the battery pack 200 also includes a mounting bracket 600. At least one side of the multiple rows of battery bars 220 in the first direction is provided with the mounting bracket 600. The mounting bracket 600 is sealed to the corresponding first cavity wall 111. Multiple mounting grooves 610 are formed on the side of the mounting bracket 600 facing the battery bar 220, arranged sequentially along a third direction. Multiple battery cells 210 of the battery bar 220 are respectively positioned and fitted into the corresponding mounting grooves 610. This can also be understood as follows: the same battery pack 200 has a mounting bracket 600 on at least one side of the first direction. By sealing the mounting bracket 600 to the corresponding first cavity wall 111 and positioning multiple battery cells 210 within the corresponding mounting grooves 610, a sealed connection between the battery cells 210 and the first cavity wall 111 is achieved. 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 contributing to the structural strength of the battery pack 1000.

[0160] In other words, the mounting bracket 600 in this application is mainly used to fix the battery cell 210 to ensure the positional stability of the battery cell 210.

[0161] It should be noted that, since the battery pack 200 also includes a mounting bracket 600, when the second heat insulation component 320 is sandwiched between the battery pack 200 and the first cavity wall 111 and needs to be sealed to the battery pack 200, the second heat insulation component 320 can be sealed to the mounting bracket 600. This not only achieves a sealed connection between the second heat insulation component 320 and the battery pack 200, but also reduces the difficulty of connecting the second heat insulation component 320 and the battery pack 200, and avoids damage to the battery cells 210 during connection, thereby extending the service life of the battery pack 200 and ensuring the safety of the battery pack 200 in use.

[0162] In some embodiments, combined with Figure 1 , Figure 6 and Figure 7 As shown, a first connector 810 is provided between the mounting bracket 600 and the corresponding first cavity wall 111. The first connector 810 is used to achieve a sealed connection between the mounting bracket 600 and the corresponding first cavity wall 111, so as to reduce the difficulty of fixing the mounting bracket 600. At the same time, the outer shell 100 can be used to support the mounting bracket 600, thereby improving the structural stability of the mounting bracket 600 and ensuring the working performance of the mounting bracket 600.

[0163] Optionally, combined Figure 1 , Figure 4 and Figure 7 As shown, a portion of the first connector 810 is disposed between the mounting bracket 600 and the second heat insulation component 320 to achieve a sealed connection between the second heat insulation component 320 and the mounting bracket 600, thereby achieving a sealed connection between the second heat insulation component 320 and the battery pack 200.

[0164] In some embodiments, combined with Figure 6 and Figure 7 As shown, a second connector 820 is provided between the battery cell 210 and the mounting groove 610. The second connector 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 using the mounting bracket 600 to support the battery cell 210. At the same time, it can also improve the positional stability of the battery cell 210 to ensure the working performance of the battery cell 210.

[0165] In some embodiments, the first connector 810 and the second connector 820 are both formed as adhesive. The adhesive is used to achieve a sealed connection between the mounting bracket 600 and the corresponding first cavity wall 111 and to achieve 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 components of the battery pack 1000 are stable.

[0166] In some embodiments, combined with Figure 6 and Figure 7 As shown, the multi-row battery pack 220 is provided with mounting brackets 600 on both sides in the first direction, and the mounting brackets 600 on both sides of the multi-row battery pack 220 in the first direction are fixedly connected. By providing mounting brackets 600 on both sides of the multi-row battery pack 220 in the first direction, the same battery pack 200 is sealed to the corresponding first cavity wall 111 on both sides in the first direction, 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.

[0167] Meanwhile, by fixing the mounting brackets 600 on both sides of the multi-row battery pack 220 in the first direction, it is convenient to use the mounting brackets 600 on both sides to support the multi-row battery pack 220, thereby improving the positional stability of the multi-row battery pack 220 and thus improving the positional stability of the battery cell 210, so as to ensure the working performance of the battery cell 210.

[0168] In some embodiments, the multi-row battery pack 220 is bolted together with the mounting brackets 600 on both sides in the first direction to achieve a fixed connection between the mounting brackets 600 on both sides and reduce the connection difficulty. At the same time, it can also make the mounting brackets 600 on both sides detachable to facilitate the maintenance of the battery cells 210 located in the mounting brackets 600.

[0169] In some embodiments, such as Figure 6 As shown, the battery pack 1000 also includes a heat exchanger 700, which is located between two adjacent rows of battery packs 220 and exchanges heat with them. This achieves the purpose of adjusting the temperature of the battery packs 220, which in turn adjusts the temperature of the individual battery cells 210, ensuring that the temperature of the individual battery cells 210 is maintained within a suitable temperature range during operation. This guarantees the safety of the individual battery cells 210 during use and also ensures their performance.

[0170] In some embodiments, the heat exchanger 700 is formed as a heat exchange plate, and the heat exchange plate is filled with a heat exchange medium. The heat exchange medium is used to exchange heat with two adjacent rows of battery packs 220, thereby achieving the purpose of adjusting the temperature of the battery packs 220 by using the heat exchanger 700.

[0171] Optionally, such as Figure 6 As shown, the battery pack 1000 also includes a conveying member 730, which is used to convey the heat exchange medium toward the heat exchanger 700 to ensure the heat exchange effect of the heat exchanger 700.

[0172] The heat exchange medium mentioned here can be a refrigerant.

[0173] Meanwhile, the above configuration also allows one heat exchanger 700 to exchange heat with two adjacent rows of battery packs 220 simultaneously. This not only adjusts the temperature of the battery packs 220, but also reduces the number of heat exchangers 700 used, thus lowering the cost of using the heat exchangers 700.

[0174] In some embodiments, the heat exchanger 700 is fixedly connected to each battery cell 210 of two adjacent rows of battery banks 220. While stabilizing the relative positions of the multiple battery cells 210 in the two adjacent rows of battery banks 220, the heat exchanger 700 is also stabilized relative to the adjacent battery cells 210, thereby ensuring the heat exchange effect of the heat exchanger 700.

[0175] In some embodiments, such as Figure 6 As shown, a third connector 830 is provided between the heat exchanger 700 and each battery cell 210 of the battery pack 220. The third connector 830 is used to achieve a fixed connection between the heat exchanger 700 and the battery cell 210, so as to make the position of the heat exchanger 700 relative to the battery cell 210 stable, thereby facilitating the heat exchanger 700 to dissipate heat from the battery cell 210.

[0176] In some embodiments, the third connector 830 is formed as a bonding adhesive. The bonding adhesive can not only achieve a fixed connection between the heat exchanger 700 and the battery cell 210, but also ensure the connection strength between the heat exchanger 700 and the battery cell 210, and reduce the connection difficulty between the heat exchanger 700 and the battery cell 210.

[0177] In summary, all components of the battery pack 1000 of this application are bonded together with adhesive. Compared with the prior art of filling the battery pack 1000 with expanding foam and setting screw structures, this not only allows the battery cells 210 to be stably installed in the outer casing 100, but also effectively reduces the weight of the battery pack 1000, achieving lightweighting of the battery pack 1000. At the same time, it can also reduce the cost of the battery pack 1000 and ensure the heat dissipation efficiency of the battery cells 210.

[0178] In addition, by gluing the components of the battery pack 1000 together, the base 120, the top cover 130 and the battery pack 200 can be connected to form a sandwich structure, which helps to ensure the structural strength of the battery pack 1000.

[0179] In some embodiments, combined with Figure 6 and Figure 8As shown, the battery cell 210 is a cylindrical battery with its axial direction parallel to the second direction. The battery cells 210 in adjacent rows of battery banks 220 are staggered in the third direction. The heat exchanger 700 includes multiple first protrusions 710 and multiple second protrusions 720, which are alternately arranged along the third direction. The first protrusions 710 protrude towards one row of adjacent battery banks 220, and the second protrusions 720 protrude towards the other row. This allows grooves with different recess directions to be formed on opposite sides of the heat exchanger 700. These different grooves cooperate to fix adjacent rows of battery banks 220, enabling the heat exchanger 700 to be fixedly connected to each battery cell 210 in each of the adjacent rows of battery banks 220. This ensures a stable relative position between the heat exchanger 700 and the adjacent battery cells 210, guaranteeing the heat exchange effect of the heat exchanger 700.

[0180] Meanwhile, by providing multiple first protrusions 710 and multiple second protrusions 720 on the heat exchanger 700, the battery cells 210 of two adjacent rows of battery packs 220 can be staggered one by one in the third direction. This allows part of the structure of the battery cells 210 in one row of battery packs 220 to be located between two adjacent battery cells 210 in the other row, reducing the size of the battery pack 1000 in the first direction. This helps to reduce the space occupied by the battery pack 1000 and reduce the installation difficulty of the battery pack 1000.

[0181] The following describes the electrical device according to an embodiment of the present invention.

[0182] An electrical device according to an embodiment of the present invention includes: a battery pack 1000.

[0183] Among them, battery pack 1000 is the aforementioned battery pack 1000, and the specific structure of battery pack 1000 will not be described in detail here.

[0184] As can be seen from the above structure, the electrical device of the present invention improves the safety of use by adopting the aforementioned battery pack 1000.

[0185] It should be noted that the electrical device in this application may be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc.

[0186] When the electrical device is a vehicle, the vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc.

[0187] In some embodiments, a battery pack 1000 is provided in the vehicle. The battery pack 1000 may be located at the bottom, front, or rear of the vehicle. The battery pack 1000 may be used to power the vehicle, for example, the battery pack 1000 may be used as the operating power source for the vehicle.

[0188] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0189] Figure 6 and Figure 7 The above description shows two rows of battery bars 220 arranged sequentially in the first direction for illustrative purposes. However, after reading the above technical solution, those skilled in the art will obviously understand that the solution can be applied to technical solutions with three, four, or more rows of battery bars 220, which would also fall within the protection scope of this invention.

[0190] The heat exchange principle of the battery pack 1000 and other components of the electrical device having it, such as the heat exchanger 700, according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0191] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above 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 one or more embodiments or examples.

[0192] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: An outer casing, wherein at least one receiving cavity is formed within the outer casing, the receiving cavity having two first cavity walls disposed opposite each other along a first direction; A battery pack, at least one of the receiving cavities is provided with at least two sets of the battery packs spaced apart along a second direction, each set of the battery packs including a plurality of battery cells, the first direction intersecting the second direction; A first heat insulation structure is sealed and connected to two first cavity walls at both ends in the first direction. The first heat insulation structure includes a first heat insulation element and a second heat insulation element connected together. The first heat insulation element is spaced between two adjacent battery packs to separate the space between the two adjacent battery packs into a first discharge channel and a second discharge channel. The first discharge channel is connected to the pressure relief structure of at least one battery cell in one of the two adjacent battery packs. The second discharge channel is connected to the pressure relief structure of at least one battery cell in the other of the two adjacent battery packs. At least one of the two ends of the first heat insulation element in the first direction is provided with at least one second heat insulation element. The second heat insulation element is sandwiched between the first cavity wall and the battery pack that is glued and fixed to the first cavity wall by an adhesive.

2. The battery pack according to claim 1, characterized in that, The first heat insulation member has a second heat insulation member at one of its two ends in the first direction, and the ends of the first heat insulation member and the second heat insulation member that are far apart from each other are respectively sealed to the corresponding first cavity wall.

3. The battery pack according to claim 2, characterized in that, The end of the first heat insulation member away from the second heat insulation member is inserted into a slot on the corresponding first cavity wall.

4. The battery pack according to claim 2, characterized in that, The first heat insulation member has two second heat insulation members at one end in the first direction, and the two second heat insulation members are respectively located on both sides of the first heat insulation member in the second direction.

5. The battery pack according to claim 1, characterized in that, The second heat insulation component is connected to the corresponding battery pack.

6. The battery pack according to claim 5, characterized in that, In the second direction, the overlap length L between the second heat insulation member and the battery pack is greater than 10 mm.

7. The battery pack according to claim 1, characterized in that, The first heat insulation element is formed as a plate structure, and the thickness of the first heat insulation element is t ≥ 1 mm; and / or, The second heat insulation element is formed into a plate-like structure, and the thickness T of the second heat insulation element is ≥1mm.

8. The battery pack according to claim 1, characterized in that, At least one of the two adjacent battery packs 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.

9. The battery pack according to claim 1, characterized in that, At least one set of the pressure relief structures of the battery pack are respectively disposed on both sides of the battery pack in the second direction. The receiving cavity also has two second cavity walls disposed opposite to each other in 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 walls. The third discharge channel communicates with a portion of the pressure relief structures of the battery pack adjacent to the second cavity wall.

10. The battery pack according to claim 9, characterized in that, The battery pack adjacent to the second cavity wall is sealed to both of the first cavity walls respectively; and / or, The battery pack also includes a second heat insulation structure, at least partially disposed between the battery pack and the second cavity wall, and separating the space between the battery pack and the second cavity wall to form the third discharge channel.

11. The battery pack according to claim 9, characterized in that, The receiving cavity also has two third cavity walls arranged opposite each other along a third direction, and at least one of the third cavity walls forms a fourth discharge channel. At least one of the first discharge channel, the second discharge channel and the third discharge channel is connected to the fourth discharge channel. The first direction and the second direction are perpendicular to the third direction, respectively.

12. The battery pack according to claim 10, characterized in that, The battery pack also includes a second thermal insulation structure, which is sealed to at least one of the two first cavity walls such that at least one of the two first cavity walls participates in defining the third emission channel.

13. The battery pack according to claim 12, characterized in that, The second heat insulation structure includes a third heat insulation component, which is fixed to the second cavity wall and sealed to the two first cavity walls respectively.

14. The battery pack according to claim 9, characterized in that, The pressure relief structures of the two adjacent electrically connected battery cells of the at least one group of battery packs are respectively disposed on both sides of the battery pack in the second direction, and the terminals of the two adjacent electrically connected battery cells of the at least one group of battery packs are respectively disposed on both sides of the battery pack in the second direction.

15. The battery pack according to any one of claims 1-14, characterized in that, The battery pack includes multiple rows of battery bars arranged sequentially along the first direction, and each row of battery bars includes multiple battery cells arranged sequentially along a third direction. The first direction and the second direction are perpendicular to the third direction, respectively.

16. The battery pack according to claim 15, characterized in that, The battery cell 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, characterized in that, The individual battery cells in two adjacent rows of battery packs are staggered one by one in the third direction.

18. The battery pack according to claim 15, characterized in that, The battery pack further includes a mounting bracket. The mounting bracket is provided on at least one side of the multiple rows of battery packs in the first direction. The mounting bracket is sealed to the corresponding first cavity wall. The side of the mounting bracket facing the battery pack has a plurality of mounting grooves arranged sequentially along the third direction. The plurality of battery cells of the battery pack are respectively limited and fitted into the corresponding mounting grooves.

19. The battery pack according to claim 18, characterized in that, The multiple rows of battery packs are provided with mounting brackets on both sides of the first direction, and the mounting brackets on both sides of the multiple rows of battery packs in the first direction are fixedly connected.

20. The battery pack according to claim 15, characterized in that, It also includes a heat exchanger, which is disposed between two adjacent rows of battery packs and exchanges heat with the two adjacent rows of battery packs.

21. The battery pack according to claim 20, characterized in that, The heat exchanger is fixedly connected to each of the individual cells in the two adjacent rows of battery banks.

22. The battery pack according to claim 20, characterized in that, The battery cell is a cylindrical battery, and the axis of the cylindrical battery is parallel to the second direction. The battery cells in two adjacent rows of battery cells are staggered in the third direction. The heat exchanger includes a plurality of first protrusions and a plurality of second protrusions, which are alternately arranged along the third direction. The first protrusions protrude toward one of the two adjacent rows of battery cells, and the second protrusions protrude toward the other row of the two adjacent rows of battery cells.

23. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1-22.

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