Battery pack and electric device with same

Abstract

The invention discloses a battery pack and a power utilization device with the battery pack, a containing cavity is formed in a shell of the battery pack, the containing cavity is provided with opposite cavity walls, the containing cavity is provided with at least two battery packs arranged at intervals, and each battery pack comprises a plurality of single batteries; the heat insulation structure is connected to the two first cavity walls in a sealed mode and comprises a first heat insulation piece and a second heat insulation piece, the first heat insulation piece divides the space between every two adjacent battery packs into two discharge channels, and the two discharge channels communicate with the pressure relief structures of the single batteries of the adjacent battery packs correspondingly. At least one of the two ends of the first heat insulation part in the first direction is provided with a second heat insulation part, and the second heat insulation part is clamped between the first cavity wall and the battery pack. According to the battery pack provided by the embodiment of the invention, independent pressure relief and heat dissipation between two adjacent battery packs can be realized, the structure of the battery pack can be simplified, the effect of limiting the gluing thickness between the first cavity wall and the battery pack is achieved, and the connection between the first cavity wall and the battery pack is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack and an electrical device having the same. Background Art

[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 the battery pack, a pressure relief structure is usually provided on the battery cell. During the use of the battery pack, if the internal air pressure of the battery cell increases to a certain level, the pressure relief structure can be controlled to open. At this time, the flame, smoke or gas inside the battery cell can be discharged through the pressure relief structure to achieve the purpose of pressure relief.

[0004] However, when the battery cells in the existing battery pack release pressure, they are likely to affect the adjacent battery groups, thereby causing the adjacent battery groups to also suffer from chain runaway, thereby reducing the safety of the battery pack. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery pack that can prevent adjacent battery packs from affecting each other during pressure relief and simplify the structure of the battery pack, thereby solving the technical problem in the prior art that battery cells in the battery pack are prone to affect adjacent battery packs during pressure relief.

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

[0007] A battery pack according to an embodiment of the present invention comprises: a shell, wherein at least one accommodating cavity is formed in the shell, and the accommodating cavity has two first cavity walls arranged opposite to each other along a first direction; a battery pack, wherein at least one of the accommodating cavities is provided with at least two groups of the battery packs arranged at intervals along a second direction, each group of the battery packs includes a plurality of battery cells, and the first direction intersects with the second direction; a first thermal insulation structure, wherein the first thermal insulation structure is sealed and connected to the two first cavity walls at both ends in the first direction, and the first thermal insulation structure comprises a connected first thermal insulation member and a second thermal insulation member, the first thermal insulation member is arranged between two adjacent groups of the battery packs to separate the space between the two adjacent groups of the battery packs into a first discharge channel and a second discharge channel, the first discharge channel is communicated with a pressure relief structure of at least one battery cell of one of the two adjacent groups of the battery packs, and the second discharge channel is communicated with a pressure relief structure of at least one battery cell of the other of the two adjacent groups of the battery packs, at least one of the two ends of the first thermal insulation member in the first direction is provided with at least one second thermal insulation member, and the second thermal insulation member is sandwiched between the first cavity wall and the battery pack adhesively fixed to the first cavity wall by an adhesive member.

[0008] According to the battery pack of the embodiment of the present invention, a first thermal insulation structure is provided, and the first thermal insulation member of the first thermal insulation structure is used to separate the space between two adjacent battery groups into a first discharge channel and a second discharge channel. In this way, the two adjacent battery groups can release pressure separately through the first discharge channel and the second discharge channel respectively when releasing pressure, so as to avoid, to a certain extent, the influence of one battery group on the other adjacent battery group when releasing pressure, thereby avoiding chain runaway of multiple battery groups when releasing pressure and dissipating heat, thereby improving the safety of the battery pack; at the same time, at least one second thermal insulation member is provided at at least one end of the two ends of the first thermal insulation member in the first direction, and the second thermal insulation member is clamped between the first cavity wall and the battery group glued and fixed to the first cavity wall by the adhesive member. While facilitating the use of the second thermal insulation member to achieve a sealed connection between the first thermal insulation member and the first cavity wall, the second thermal insulation member can also be used to limit the bonding thickness between the first cavity wall and the battery group, so as to ensure the fixed connection between the first cavity wall and the battery group, and improve the connection strength between the first cavity wall and the battery group, thereby making the battery pack structure stable. That is to say, the battery pack of the present application can not only release pressure, but also avoid mutual influence between adjacent battery packs during the pressure release process, and at the same time 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 second thermal insulation member is provided at one of the two ends of the first thermal insulation member in the first direction, and the ends of the first thermal insulation member and the second thermal insulation member that are away from each other are respectively sealed and connected to the corresponding first cavity wall.

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

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

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

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

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

[0015] In some embodiments, at least one of the two adjacent groups 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 of the pressure relief structures of at least one group of the battery packs are respectively arranged on both sides of the battery pack in the second direction, and the accommodating cavity also has two second cavity walls arranged opposite to each other along the second direction, and the battery pack and the second cavity walls are spaced apart so that a third discharge channel is provided between the battery pack and the second cavity wall, and the third discharge channel is connected to part of the pressure relief structures of the battery pack adjacent to the second cavity wall.

[0017] In some embodiments, the battery pack adjacent to the second cavity wall is sealed and connected to the two first cavity walls respectively; and / or, the battery pack also includes a second thermal insulation structure, at least a portion of which is disposed between the battery pack and the second cavity wall and separates the space between the battery pack and the second cavity wall into the third discharge channel.

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

[0019] In some embodiments, the battery pack further includes a second thermal insulation structure, and the second thermal insulation structure is sealingly connected to at least one of the two first cavity walls, so that at least one of the two first cavity walls participates in defining the third exhaust channel.

[0020] In some embodiments, the second thermal insulation structure includes a third thermal insulation component, and the third thermal insulation component is fixed on the second cavity wall and is sealed and connected to the two first cavity walls respectively.

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

[0022] In some embodiments, the battery pack includes a plurality of battery rows sequentially arranged along the first direction, each of the battery rows includes a plurality of battery cells sequentially arranged along a third direction, and the first direction and the second direction are respectively perpendicular to the third direction.

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

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

[0025] In some embodiments, the battery pack also includes a mounting bracket, and the mounting bracket is provided on at least one of the two sides of the multiple rows of battery rows in the first direction, the mounting bracket is sealed and connected to the corresponding first cavity wall, and a plurality of mounting grooves arranged in sequence along the third direction are formed on the side of the mounting bracket facing the battery row, and the plurality of battery cells of the battery row are respectively limited and fitted in the corresponding mounting grooves.

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

[0027] In some embodiments, the battery pack further includes a heat exchange component, which is disposed between two adjacent rows of the battery rows and exchanges heat with the two adjacent rows of the battery rows.

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

[0029] In some embodiments, the battery cells are cylindrical batteries, the axial direction of the cylindrical batteries is parallel to the second direction, the battery cells in two adjacent rows of the battery rows are staggered one by one in the third direction, the heat exchange element includes a plurality of first protrusions and a plurality of second protrusions, the plurality of first protrusions and the plurality of second protrusions are alternately arranged one by one along the third direction, the first protrusions protrude toward one of the two adjacent rows of the battery rows, and the second protrusions protrude toward the other row of the two adjacent rows of the battery rows.

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

[0031] According to the electric device of the embodiment of the present invention, the use safety of the electric device is improved by adopting the aforementioned battery pack.

[0032] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0034] Figure 1 Exploded diagram of a battery pack according to some embodiments of the present invention.

[0035] Figure 2 A top view of a battery pack without some structures according to some embodiments of the present invention.

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

[0037] Figure 4 for Figure 3 A partial enlarged view of area Ⅰ in the middle.

[0038] Figure 5 for Figure 3 A partial enlarged view of the middle area II.

[0039] Figure 6 An exploded view of a battery pack without a casing according to some embodiments of the present invention.

[0040] Figure 7 1 is an exploded view of a battery pack and a mounting bracket according to some embodiments of the present invention.

[0041] Figure 8 This is a partial enlarged view of two adjacent rows of batteries in some embodiments of the present invention when they are matched.

[0042] Reference numerals:

[0043] 1000, battery pack;

[0044] 100. Shell;

[0045] 110. Accommodating chamber;

[0046] 111, first cavity wall; 1111, slot;

[0047] 112, second cavity wall;

[0048] 113, third cavity wall;

[0049] 120, base;

[0050] 130, upper cover;

[0051] 140, guard plate;

[0052] 200, battery pack;

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

[0054] 220, battery row;

[0055] 600, mounting bracket; 610, mounting slot;

[0056] 300, first thermal insulation structure; 310, first thermal insulation member; 320, second thermal insulation member;

[0057] 400, second thermal insulation structure; 410, third thermal insulation member;

[0058] 510, first discharge channel; 520, second discharge channel; 530, third discharge channel;

[0059] 700, heat exchange member; 710, first convex portion; 720, second convex portion; 730, conveying member;

[0060] 810, first connecting member; 820, second connecting member; 830, third connecting member; 840, sealing member;

[0061] 900. Battery management system. DETAILED DESCRIPTION

[0062] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] The battery pack 1000 according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0065] Combination Figure 1 and Figure 2 As shown, a 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 accommodating cavity 110 is formed in the housing 100, and the accommodating cavity 110 has two first cavity walls 111 arranged opposite to each other in the first direction. Here, it means that one accommodating cavity 110 or a plurality of accommodating cavities 110 are formed in the housing 100, and each accommodating cavity 110 has two first cavity walls 111, and the two first cavity walls 111 are arranged opposite to each other in the first direction.

[0067] It should be noted that the first direction mentioned here can be understood as Figure 1 That is, the accommodating chamber 110 has two first chamber walls 111 arranged opposite to each other along the X direction.

[0068] In a specific example, the X direction is the up-down direction of the battery pack 1000 , and 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 accommodating cavity 110 .

[0069] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0070] Combination Figure 1 , Figure 2 and Figure 3As shown, at least one accommodating cavity 110 is provided with at least two battery packs 200 spaced apart along the second direction, each battery pack 200 includes a plurality of battery cells 210, and the first direction intersects with the second direction. Here, it means that at least two battery packs 200 are provided in at least one accommodating cavity 110 in the housing 100, and at least two battery packs 200 are spaced apart along the second direction of the housing 100 to achieve rational utilization of the space in the accommodating cavity 110, to ensure that at least two battery packs 200 can be simultaneously arranged in the same accommodating cavity 110, and each battery pack 200 is configured to include a plurality of battery cells 210 to ensure the number of battery cells 210 in the accommodating 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 shown in .

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

[0073] At the same time, through the above-mentioned arrangement, the battery pack 200 can be placed in the outer shell 100, so that the outer shell 100 can be used to protect the battery pack 200, improve the reliability of the battery pack 200, and extend the service life of the battery pack 200. At the same time, the outer shell 100 can also be used to support the battery pack 200, to ensure the position stability of the battery pack 200 to a certain extent, which is beneficial to ensuring the working performance of the battery pack 200.

[0074] In some embodiments, one end of the accommodating cavity 110 is open, so that the battery pack 200 can be placed in the accommodating cavity 110 using the opening, reducing the difficulty of assembling the battery pack 200, thereby facilitating the use of the outer shell 100 to support and protect the battery pack 200.

[0075] Combination Figure 3 and Figure 4As shown, the first thermal insulation structure 300 is sealed and connected to the two first cavity walls 111 at both ends in the first direction, and the first thermal insulation structure 300 includes a first thermal insulation member 310 and a second thermal insulation member 320 that are connected. The first thermal insulation member 310 is arranged between two adjacent battery groups 200 to separate the space between the two adjacent battery groups 200 into a first discharge channel 510 and a second discharge channel 520. The first discharge channel 510 is connected to the pressure relief structure 211 of at least one battery cell 210 of one of the two adjacent battery groups 200, and the second discharge channel 520 is connected to the pressure relief structure 211 of at least one battery cell 210 of the other of the two adjacent battery groups 200. At least one of the two ends of the first thermal insulation member 310 in the first direction is provided with at least one second thermal insulation member 320, and the second thermal insulation member 320 is sandwiched between the first cavity wall 111 and the battery group 200 that is glued and fixed to the first cavity wall 111 by a bonding member. It can also be understood here that by sealingly connecting the two ends of the first thermal insulation structure 300 in the first direction to the two first cavity walls 111 respectively, and spacing the first thermal insulation member 310 of the first thermal insulation structure 300 between two adjacent battery groups 200, it is possible to separate the space between the two adjacent battery groups 200 into mutually independent first emission channels 510 and second emission channels 520, thereby reducing the difficulty of molding the first emission channels 510 and the second emission channels 520.

[0076] At the same time, in two adjacent battery packs 200, the pressure relief structure 211 of at least one battery cell 210 of one of the battery packs 200 is connected to the first discharge channel 510, and the pressure relief structure 211 of at least one battery cell 210 of the other battery pack 200 is connected to the second discharge channel 520. In this way, the pressure discharged through the pressure relief structure 211 can be discharged into the discharge channel (the first discharge channel 510 or the second discharge channel 520), and then the pressure is discharged through the discharge channel to reduce the difficulty of pressure relief of the battery cell 210, thereby ensuring the safety of use of the battery cell 210, that is, ensuring the safety of use of the battery pack 1000.

[0077] In addition, through the above arrangement, when two adjacent battery packs 200 are dissipating heat and relieving pressure, each battery pack 200 can release pressure through a separate discharge channel, thereby avoiding mutual influence between the two adjacent battery packs 200 during pressure release to a certain extent, further ensuring the safety of the battery pack 1000.

[0078] That is to say, the battery pack 200 of the present application can not only release pressure smoothly, but also avoid mutual influence between adjacent battery packs 200 during pressure release.

[0079] In some embodiments, the pressure relief structure 211 of at least one battery cell 210 of one group of battery packs 200 faces the first discharge channel 510, and the pressure relief structure 211 of at least one battery cell 210 of another group of battery packs 200 faces the second discharge channel 520, thereby achieving communication between the pressure relief structure 211 and the discharge channel and reducing the difficulty of communication between the pressure relief structure 211 and the discharge channel, thereby ensuring that the pressure discharged through the pressure relief structure 211 can be directly discharged into the discharge channel, reducing the difficulty of pressure relief, and also making adjacent battery packs 200 independent of each other during pressure relief, thereby avoiding mutual influence of the battery packs 200 during pressure relief and chain loss, thereby improving the safety of the battery pack 1000.

[0080] It should be noted that the pressure relief structure 211 mentioned above can be understood as an explosion-proof valve, which is used to open when the internal pressure of the battery cell 210 exceeds a preset value to achieve the purpose of pressure relief. Among them, the explosion-proof valve is a prior art well known to those skilled in the art, and the specific structure of the explosion-proof valve is not described in detail here.

[0081] It should also be noted that by sealingly connecting the two ends of the first insulation structure 300 in the first direction to the two first cavity walls 111 respectively, the first discharge channel 510 and the second discharge channel 520 can be defined by the cooperation of the two first cavity walls 111, thereby reducing the difficulty of forming the first discharge channel 510 and the second discharge channel 520. At the same time, it can also avoid setting up separate structural parts to form the first discharge channel 510 and the second discharge channel 520, thereby reducing the structural parts of the battery pack 1000, thereby simplifying the structure of the battery pack 1000, reducing the manufacturing cost of the battery pack 1000, and also improving the space utilization of the battery pack 1000, and facilitating the lightweighting of the battery pack 1000.

[0082] In addition, the two first cavity walls 111 can be used to support the first thermal insulation structure 300, eliminating the need to provide a support member in the battery pack 1000 to support the first thermal insulation structure 300, so as to further simplify the structure of the battery pack 1000, and ensure the position stability of the first thermal insulation structure 300, thereby ensuring the working performance of the first thermal insulation structure 300.

[0083] Among them, the above-mentioned sealing connection can be formed by bonding, abutting or clamping, etc. The sealing connection can not only enable the first insulation structure 300 and the first cavity wall 111 to form a fixed connection, but also ensure the sealing of the first discharge channel 510 and the second discharge channel 520 to a certain extent, thereby avoiding the mutual influence of the two adjacent battery groups 200 during pressure relief to a certain extent, thereby ensuring the safety of the battery pack 1000.

[0084] In addition, the present application sets at least one second thermal insulation member 320 at at least one of the two ends of the first thermal insulation member 310 in the first direction, and clamps the second thermal insulation member 320 between the first cavity wall 111 and the battery pack 200 that is glued and fixed to the first cavity wall 111 by means of adhesive joints. This means that the battery pack 200 is glued and fixed to the first cavity wall 111 by means of adhesive joints, and the second thermal insulation member 320 is clamped between the first cavity wall 111 and the battery pack 200. In this way, not only can the second thermal insulation member 320 be used to achieve a sealed connection between the first thermal insulation structure 300 and the first cavity wall 111, but the second thermal insulation member 320 can also be used to limit the thickness of the adhesive joint between the first cavity wall 111 and the battery pack 200, thereby avoiding a lower connection strength between the first cavity wall 111 and the battery pack 200 due to a thinner adhesive joint.

[0085] That is to say, the second thermal insulation member 320 can ensure that the first thermal insulation structure 300 and the first cavity wall 111 can form a sealed connection, while also enabling the first cavity wall 111 and the battery pack 200 to form a stable fixed connection, thereby improving the position stability of the battery pack 200.

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

[0087] It can be seen from the above structure that the battery pack 1000 of the embodiment of the present invention, by providing a first thermal insulation structure 300, and utilizing the first thermal insulation member 310 of the first thermal insulation structure 300 to separate the space between two adjacent battery packs 200 into a first discharge channel 510 and a second discharge channel 520. In this way, while ensuring that the battery pack 200 can effectively release pressure when thermal runaway occurs, the two adjacent battery packs 200 can also release pressure separately, so as to avoid, to a certain extent, the impact of one battery pack 200 on the other adjacent battery pack 200 during pressure release, thereby improving the safety of the battery pack 1000.

[0088] At the same time, the two ends of the first thermal insulation structure 300 in the first direction are sealed and connected to the two first cavity walls 111 respectively, so that the first discharge channel 510 and the second discharge channel 520 are defined by the two first cavity walls 111, thereby reducing the difficulty of molding the first discharge channel 510 and the second discharge channel 520, and also reducing the structural parts of the battery pack 1000, thereby achieving the purpose of simplifying the structure of the battery pack 1000 and reducing the manufacturing cost of the battery pack 1000.

[0089] In addition, at least one second thermal insulation member 320 is arranged on at least one of the two ends of the first thermal insulation member 310 in the first direction, and the second thermal insulation member 320 is sandwiched between the first cavity wall 111 and the battery pack 200, so as to facilitate the use of the second thermal insulation member 320 to achieve a sealed connection between the first thermal insulation structure 300 and the first cavity wall 111. While reducing the connection strength between the first thermal insulation structure 300 and the first cavity wall 111, it can also ensure the connection area between the first thermal insulation structure 300 and the first cavity wall 111, thereby improving the connection strength. At the same time, the second thermal insulation member 320 can also be used to limit the thickness of the adhesive between the first cavity wall 111 and the battery pack 200, thereby avoiding the low connection strength between the first cavity wall 111 and the battery pack 200 due to the thin adhesive.

[0090] That is to say, the battery pack 1000 of the present application not only reduces the difficulty of pressure relief of the battery pack 200, but also avoids the mutual influence between adjacent battery packs 200 during the pressure relief process, and at the same time 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] It can be understood that, compared with the prior art, the present application sets a first insulation structure 300 between two adjacent battery packs 200 to realize the formation of mutually independent first discharge channel 510 and second discharge channel 520 between the two adjacent battery packs 200, and sets the first cavity wall 111 of the outer shell 100 to participate in defining the first discharge channel 510 and the second discharge channel 520. In this way, while avoiding the mutual influence of the two adjacent battery packs 200 during pressure relief, the molding difficulty of the first discharge channel 510 and the second discharge channel 520 can be reduced, and the structure of the battery pack 1000 can be simplified, the manufacturing cost of the battery pack 1000 can be reduced, the weight of the battery pack 1000 can be reduced, and the space utilization rate of the battery pack 1000 can be improved.

[0092] It should be noted that, in the battery pack 1000 , the multiple battery cells 210 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 210 are connected in series and in parallel.

[0093] In some embodiments, Figure 4 As shown, the first discharge channel 510 and the second discharge channel 520 are respectively arranged on the opposite sides of the first thermal insulation member 310 in the second direction. This can reduce the difficulty of forming the first discharge channel 510 and the second discharge channel 520, and can also avoid setting the discharge channel in the first thermal insulation member 310, which is beneficial to reducing the thickness of the first thermal insulation member 310, reducing the manufacturing cost of the first thermal insulation member 310, and at the same time reducing the weight of the first thermal insulation member 310, thereby achieving lightweight of the first thermal insulation member 310 and improving the space utilization rate of the battery pack 1000.

[0094] In some embodiments, the first thermal insulation member 310 is a mica board, which has a high melting point. This can prevent the heat discharged by the battery pack 200 from breaking through the first thermal insulation member 310, thereby improving the thermal insulation performance of the first thermal insulation member 310. This can to a certain extent prevent the two adjacent battery packs 200 from affecting each other during pressure relief, thereby ensuring the safety of the battery pack 1000.

[0095] In some embodiments, Figure 1 As shown, the outer shell 100 includes a base 120 and an upper cover 130, and the upper cover 130 is connected to the base 120 to form a accommodating cavity 110 in the outer shell 100, thereby reducing the difficulty of molding the accommodating cavity 110, and at the same time reducing the difficulty of assembling the battery pack 200, so as to ensure that the battery pack 200 can be effectively arranged in the accommodating cavity 110.

[0096] Alternatively, if Figure 1 As shown, the base 120 can be a hollow structure with one end open, and the upper cover 130 can be a plate-like structure, and the upper cover 130 covers the open side of the base 120, so that the base 120 and the upper cover 130 jointly define the accommodating cavity 110; or, the base 120 and the upper cover 130 can also be both hollow structures with one side open (not shown in this example figure), and the open side of the upper cover 130 covers the open side of the base 120, so that the base 120 and the upper cover 130 jointly define the accommodating cavity 110.

[0097] Of course, the housing 100 formed by the base 120 and the upper cover 130 can be in various shapes, such as a cylinder or a cuboid.

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

[0099] Alternatively, if Figure 1 As shown, a seal 840 is provided between the base 120 and the upper cover 130, and the seal 840 is used to achieve a sealed connection between the base 120 and the upper cover 130. In this way, while ensuring the sealing performance of the accommodating cavity 110, the base 120 and the upper cover 130 can also be fixedly connected to improve the structural stability of the outer shell 100, while reducing the difficulty of connecting the base 120 and the upper cover 130.

[0100] In some embodiments, the sealing member 840 is formed as a sealant, thereby facilitating the use of the sealing member 840 to achieve a sealed and fixed connection between the base 120 and the upper cover 130 .

[0101] In some embodiments, Figure 1 As shown, the housing 100 further includes a guard plate 140 , which is disposed on the outer side of the base 120 to protect the housing 100 and extend the service life of the housing 100 .

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

[0103] In some embodiments, when 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, the two adjacent battery packs 200 are both sealed and connected to the two first cavity walls 111. Here, it means that when the first heat insulation structure 300 is sealed and connected to the two first cavity walls 111, the two adjacent battery packs 200 are also sealed and connected to the two first cavity walls 111, so as to avoid the pressure discharged into the first exhaust channel 510 and the second exhaust channel 520 from being discharged from between the battery pack 200 and the corresponding first cavity wall 111 to a certain extent, thereby ensuring that the pressure discharged into the first exhaust channel 510 and the second exhaust channel 520 can be discharged along a predetermined route to ensure the safety of the battery pack 1000.

[0104] In addition, by sealingly connecting two adjacent battery packs 200 to the two first cavity walls 111 and sealingly connecting the first thermal insulation structure 300 to the two first cavity walls 111, it is also possible to utilize the two first cavity walls 111 to cooperate and support the battery pack 200 and the first thermal insulation structure 300, so as to reduce the difficulty of fixing the battery pack 200 and the first thermal insulation structure 300, while improving the structural stability of the battery pack 200 and the first thermal insulation structure 300, and to avoid shaking of the battery pack 200 and the first thermal insulation structure 300 to a certain extent, thereby ensuring the working performance of the battery pack 200 and the first thermal insulation structure 300.

[0105] In some embodiments, the battery pack 200 is connected to the first cavity wall 111 via adhesive fittings to seal the battery pack 200 to the two first cavity walls 111, reduce the difficulty of connecting the battery pack 200 and the first cavity wall 111, and ensure the connection quality between the battery pack 200 and the first cavity wall 111.

[0106] In some embodiments, Figure 4As shown, the second heat insulating member 320 is bent and connected to the first heat insulating member 310 and is sealed and connected to the first cavity wall 111. In this way, the second heat insulating member 320 can be used to achieve a sealed connection between the first heat insulating member 310 and the first cavity wall 111, so that the first cavity wall 111 can support the first heat insulating member 310, and the first cavity wall 111 of the housing 100 can also participate in defining the first discharge channel 510 and the second discharge channel 520, thereby reducing the difficulty of molding 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 thermal insulation member 320 extends along the second direction, so that the second thermal insulation member 320 is bent and connected to the first thermal insulation member 310 and sealed to the first cavity wall 111 , thereby reducing the difficulty of fixing the second thermal insulation member 320 .

[0108] In some embodiments, in combination Figure 2 , Figure 3 and Figure 4 As shown, a second thermal insulation member 320 is disposed at one of the two ends of the first thermal insulation member 310 in the first direction, and the ends of the first thermal insulation member 310 and the second thermal insulation member 320 that are away from each other are respectively sealed and connected to the corresponding first cavity wall 111 . That is to say, one end of the first thermal insulation member 310 away from the second thermal insulation member 320 is sealed and connected to the corresponding first cavity wall 111, and one end of the second thermal insulation member 320 away from the first thermal insulation member 310 is sealed and connected to the corresponding first cavity wall 111. In this way, the two ends of the first thermal insulation structure 300 in the first direction can be sealed and connected to the two first cavity walls 111 respectively, so as to separate the space between the two adjacent battery packs 200 into the first discharge channel 510 and the second discharge channel 520, and the first discharge channel 510 and the second discharge channel 520 are defined by the two first cavity walls 111, thereby reducing the difficulty of forming the first discharge channel 510 and the second discharge channel 520. When each battery pack 200 is depressurized through a separate discharge channel, the structural parts of the battery pack 1000 can also be reduced, thereby achieving the purpose of simplifying the structure of the battery pack 1000 and reducing the manufacturing cost of the battery pack 1000.

[0109] In some embodiments, in combination Figure 2 , Figure 3 and Figure 4As shown, one end of the first thermal insulation member 310 away from the second thermal insulation member 320 is inserted into the slot 1111 on the corresponding first cavity wall 111. In other words, one end of the first thermal insulation member 310 is sealed and connected to the first cavity wall 111 through the second thermal insulation member 320, and the other end of the first thermal insulation member 310 is inserted into the slot 1111 on the corresponding first cavity wall 111, so that both opposite ends of the first thermal insulation member 310 can form a sealed connection with the first cavity wall 111, and the difficulty of fixing the first thermal insulation structure 300 can also be reduced.

[0110] In some embodiments, Figure 4 As shown, two protrusions are provided on one of the two first cavity walls 111, and a slot 1111 is formed between the two protrusions. In this way, while the first thermal insulation member 310 is plugged in and matched with one of the first cavity walls 111, the difficulty of forming the slot 1111 can be reduced, and the structural strength of the first cavity wall 111 is avoided from being reduced due to the provision of the slot 1111, thereby extending the service life of the housing 100.

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

[0112] In a specific example, through the above-mentioned arrangement, after the assembly of two adjacent battery packs 200 is completed, one end of the first thermal insulation member 310 plugged into the first cavity wall 111 can be first inserted between the two adjacent battery packs 200 and plugged into the slot 1111 on the first cavity wall 111, and then the second thermal insulation member 320 provided on the other end of the first thermal insulation member 310 is sealed and connected to the first cavity wall 111, so as to achieve the purpose of fixing the first thermal insulation structure 300, and realize the use of the first thermal insulation structure 300 to separate the space between the two adjacent battery packs 200 into mutually independent first discharge channels 510 and second discharge channels 520, so as to avoid the mutual influence of the two adjacent battery packs 200 during pressure relief to a certain extent, and ensure the safety of the battery pack 1000.

[0113] In some embodiments, Figure 4 As shown, two second heat insulating members 320 are provided at one end of the first heat insulating member 310 in the first direction, and the two second heat insulating members 320 are respectively located on both sides of the first heat insulating member 310 in the second direction. In other words, the two second heat insulating members 320 are respectively provided on both sides of the first heat insulating member 310 in the second direction, and the two second heat insulating members 320 cooperate to increase the connection strength between the first heat insulating member 310 and the first cavity wall 111, so that the position of the first heat insulating structure 300 is stable, so as to utilize the first heat insulating structure 300 to prevent the two adjacent battery groups 200 from affecting each other when the pressure is released.

[0114] In some embodiments, the two second thermal insulation members 320 are formed as an integral piece to reduce the difficulty of molding the two second thermal insulation members 320, while also reducing the difficulty of connecting the two second thermal insulation members 320 to the first thermal insulation member 310, thereby facilitating the use of the second thermal insulation members 320 to increase the connection strength between the first thermal insulation member 310 and the first cavity wall 111, and improving the positional stability of the first thermal insulation structure 300.

[0115] Optionally, the first thermal insulation structure 300 is formed as an integral piece, which can eliminate the connection between the second thermal insulation component 320 and the first thermal insulation component 310. While reducing the molding difficulty of the first thermal insulation structure 300, the connection quality between the second thermal insulation component 320 and the first thermal insulation component 310 can be ensured, thereby improving the structural stability of the first thermal insulation structure 300 and ensuring the working performance of the first thermal insulation structure 300.

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

[0117] It should be noted that when the second thermal insulation member 320 is sandwiched between the battery pack 200 and the first cavity wall 111 and connected to the battery pack 200, by respectively arranging the two second thermal insulation members 320 on both sides of the first thermal insulation member 310 in the second direction, the two second thermal insulation members 320 can also be respectively connected to the two adjacent battery packs 200, so that the position of the first thermal insulation structure 300 relative to the two adjacent battery packs 200 is stable, which is beneficial to using the first thermal insulation structure 300 to avoid the two adjacent battery packs 200 from affecting each other during pressure relief, thereby ensuring the safety of the battery pack 1000.

[0118] In some embodiments, in combination Figure 6 and Figure 7 As shown, the battery pack 200 includes mounting brackets 600 spaced apart on both sides in a first direction of the battery pack 200, and the second thermal insulation member 320 is sealed and connected to the mounting bracket 600, thereby realizing the connection between the second thermal insulation member 320 and the battery pack 200. This can reduce the difficulty of connecting the second thermal insulation member 320 and the battery pack 200, and can also prevent the second thermal insulation member 320 from damaging the battery cell 210 when connected to the battery pack 200, thereby extending the service life of the battery cell 210 and improving the safety of the battery cell 210.

[0119] In some embodiments, the second thermal insulation member 320 is respectively bonded to the mounting bracket 600 of the battery pack 200 and the first cavity wall 111, so as to achieve a sealed connection between the second thermal insulation member 320 and the battery pack 200 and the first cavity wall 111, reduce the difficulty of connecting the second thermal insulation member 320 to the battery pack 200 and the first cavity wall 111, and ensure the connection strength between the second thermal insulation member 320 and the battery pack 200 and the first cavity wall 111.

[0120] In some embodiments, Figure 4 As shown, in the second direction, the overlap length L between the second thermal insulation member 320 and the battery pack 200 is greater than 10 mm. In this way, the overlap area between the second thermal insulation member 320 and the battery pack 200 can be ensured, thereby ensuring the connection strength between the second thermal insulation member 320 and the battery pack 200, so that the second thermal insulation member 320 can be stably sandwiched between the battery pack 200 and the first cavity wall 111, thereby improving the structural stability of the first thermal insulation structure 300, ensuring the working performance of the first thermal 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 thermal insulation member 320 and the battery pack 200 is 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or 20 mm, etc.

[0122] In some embodiments, Figure 4 As shown, the first thermal insulation member 310 is formed into a plate-like structure, and the thickness of the first thermal insulation member 310 is t≥1mm. By forming the first thermal insulation member 310 into a plate-like structure, the difficulty of forming the first thermal insulation member 310 can be reduced. By setting the thickness of the first thermal insulation member 310 to t≥1mm, the thermal insulation performance of the first thermal insulation member 310 can be ensured while improving the structural strength of the first thermal insulation member 310, thereby avoiding mutual influence between two adjacent battery groups 200 during pressure relief, and ensuring the safety of the battery pack 1000.

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

[0124] In some embodiments, the thickness of the first thermal insulation member 310 is 1 mm to 2 mm. In this way, while achieving heat insulation using the first thermal insulation member 310, the thickness of the first thermal insulation member 310 can be reduced, the manufacturing cost of the first thermal insulation member 310 can be reduced, and the weight of the first thermal insulation member 310 can be reduced, achieving lightweight of the first thermal insulation member 310, and the occupied space of the first thermal insulation member 310 can be reduced, thereby improving the space utilization rate of the battery pack 1000.

[0125] In some embodiments, Figure 4As shown, the second thermal insulation member 320 is formed into a plate-like structure, and the thickness T of the second thermal insulation member 320 is ≥ 1 mm. By forming the second thermal insulation member 320 into a plate-like structure, the difficulty of molding the second thermal insulation member 320 can be reduced. At the same time, because the second thermal insulation member 320 is sandwiched between the battery pack 200 and the first cavity wall 111, and the thickness of the second thermal insulation member 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 position stability of the battery pack 200.

[0126] In a specific example, the thickness T of the second thermal insulation member 320 is 1 mm, 2 mm, or 3 mm, etc.

[0127] In some embodiments, at least one of the two adjacent battery packs 200 is bonded to at least one of the two first cavity walls 111. This allows at least one of the battery packs 200 to be bonded to the first cavity wall 111, thereby achieving bonding between the battery pack 200 and the housing 100, allowing the battery pack 200 to be stably disposed in the housing 100, improving the position stability of the battery pack 200 and ensuring the safety of the battery pack 200, thereby ensuring the working performance of the battery pack 200.

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

[0129] Optionally, the first thermal insulation structure 300 is bonded to at least one of the two first cavity walls 111. This is to achieve a sealed connection between the first thermal insulation structure 300 and the first cavity wall 111, reduce the difficulty of connecting the first thermal insulation structure 300 and the first cavity wall 111, and ensure the connection quality between the first thermal insulation structure 300 and the first cavity wall 111, so that the first thermal insulation structure 300 is supported by the first cavity wall 111, so that the first thermal insulation structure 300 can be stably arranged in the housing 100, improve the position stability of the first thermal insulation structure 300, and ensure the safety of the use of the first thermal insulation structure 300, thereby ensuring the working performance of the first thermal insulation structure 300.

[0130] In a specific example, the first thermal insulation structure 300 is adhesively connected to one of the two first cavity walls 111, and is plug-connected to the other of the two first cavity walls 111. This allows the first thermal insulation structure 300 to be fixedly connected to the two first cavity walls 111 at the same time, while also reducing the difficulty of connecting the first thermal insulation structure 300.

[0131] In some embodiments, in combination Figure 2 , Figure 3 and Figure 5 As shown, all the pressure relief structures 211 of at least one group of battery packs 200 are respectively arranged on both sides of the battery pack 200 in the second direction, and the accommodating cavity 110 also has two second cavity walls 112 arranged opposite to each other along the second direction. The battery pack 200 and the second cavity wall 112 are arranged at intervals so that a third discharge channel 530 is provided between the battery pack 200 and the second cavity wall 112, and the third discharge channel 530 is connected with some pressure relief structures 211 of the battery pack 200 adjacent to the second cavity wall 112. In other words, the battery pack 200 and the second cavity wall 112 cooperate to form the third discharge channel 530, so that while reducing the difficulty of forming the third discharge channel 530, it 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, so as to reduce the difficulty of pressure relief of the battery cell 210, thereby ensuring the safety of the battery cell 210, that is, ensuring the safety of the battery pack 1000.

[0132] At the same time, by arranging all the pressure relief structures 211 of at least one battery pack 200 on both sides of the battery pack 200 in the second direction, it is also convenient to connect adjacent battery cells 210 in the same battery pack 200, thereby reducing the difficulty of connecting the battery cells 210.

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

[0134] In some embodiments, the battery pack 200 adjacent to the second cavity wall 112 is sealed and connected to the two first cavity walls 111, respectively. Here, 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 and connected to the two first cavity walls 111, respectively, so as to avoid, to a certain extent, the pressure discharged into the third discharge channel 530 from being discharged from 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, thereby ensuring the safety of the battery pack 1000.

[0135] In some embodiments, in combination Figure 2 , Figure 3 and Figure 5As shown, the battery pack 1000 further includes a second heat insulating structure 400, at least part of which is disposed between the battery pack 200 and the second cavity wall 112 and separates the space between the battery pack 200 and the second cavity wall 112 into a third discharge channel 530. That is to say, it is not limited to forming the third discharge channel 530 by using the battery pack 200 and the second cavity wall 112 in cooperation, and the second heat insulating structure 400 can also be disposed between the battery pack 200 and the second cavity wall 112 to define the third discharge channel 530, so that it 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, so as to reduce the difficulty of pressure relief of the battery cell 210, thereby ensuring the safety of the battery cell 210, that is, ensuring the safety of the battery pack 1000.

[0136] At the same time, by providing the second heat insulating structure 400 , it is possible to avoid providing the second cavity wall 112 with a heat insulating material, thereby reducing the processing difficulty and processing cost of the second cavity wall 112 .

[0137] In some embodiments, in combination Figure 1 , Figure 2 and Figure 3 As shown, at least one second cavity wall 112 is arranged in the middle of the outer shell 100 in the second direction. In this way, not only can the second cavity wall 112 be used to enhance the structural strength of the outer shell 100, but also a plurality of accommodating cavities 110 can be formed in the outer shell 100, thereby facilitating the arrangement of a plurality of battery packs 200 in the outer shell 100 to ensure the capacity of the battery pack 1000.

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

[0139] In some embodiments, the third discharge channel 530 is formed between the battery pack 200 and the second cavity wall 112. This can reduce the difficulty of molding the third discharge channel 530 and avoid setting the third discharge channel 530 in the second thermal insulation structure 400, which is beneficial to reducing the thickness of the second thermal insulation structure 400 and reducing the manufacturing cost of the second thermal insulation structure 400. At the same time, it can also reduce the weight of the second thermal insulation structure 400, realize the lightweight of the second thermal insulation structure 400, and improve the space utilization of the battery pack 1000.

[0140] In some embodiments, Figure 3As shown, the accommodating chamber 110 also has two third chamber walls 113 arranged opposite to each other along the third direction, a fourth discharge channel is formed in at least one of the third chamber walls 113, at least one of the first discharge channel 510, the second discharge channel 520 and the third discharge channel 530 is connected to the fourth discharge channel, and the first direction and the second direction are respectively perpendicular to the third direction. The third direction mentioned here can be understood as Figure 1 In the Z direction shown in the figure, a fourth discharge channel is formed in at least one third cavity wall 113, and at least one of the first discharge channel 510, the second discharge channel 520 and the third discharge channel 530 is arranged to be connected to the fourth discharge channel, so as to introduce the pressure discharged into the first discharge channel 510, the second discharge channel 520 and / or 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, thereby ensuring the safety of the battery pack 1000.

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

[0142] In the description of the present invention, features limited to "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe the 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, a pressure relief valve is provided on the outer shell 100 of the battery pack 1000, and the pressure relief valve is connected to the fourth discharge channel. When the pressure in the fourth discharge channel is too high, the pressure can break through the pressure relief valve and be discharged through the pressure relief valve to achieve the purpose of pressure relief and ensure the safety of the battery pack 1000.

[0145] In some embodiments, at least one third cavity wall 113 is hollow inside, so as to form a fourth discharge channel in the third cavity wall 113 and reduce the difficulty of forming the fourth discharge channel.

[0146] In some embodiments, Figure 5As shown, the battery pack 1000 further includes a second heat insulating structure 400, and the second heat insulating structure 400 is sealed and connected to at least one of the two first cavity walls 111, so that at least one of the two first cavity walls 111 participates in defining the third discharge channel 530. In this way, while facilitating the formation of the third discharge channel 530, the third discharge channel 530 can also be defined by utilizing the structure of the housing 100 itself, avoiding the need to provide a separate structural member to form the third discharge channel 530, and reducing the structural members of the battery pack 1000, thereby achieving the purpose of simplifying the structure of the battery pack 1000, reducing the manufacturing cost of the battery pack 1000, and improving the space utilization of the battery pack 1000, and also facilitating the lightweighting of the battery pack 1000.

[0147] In some embodiments, Figure 5 As shown, the second heat insulation structure 400 includes a third heat insulation member 410, which is fixed on the second cavity wall 112 and sealed and connected to the two first cavity walls 111. In this way, while improving the position stability of the third heat insulation member 410, the two first cavity walls 111 of the housing 100 can also participate in defining the third discharge channel 530, so as to reduce the difficulty of forming the third discharge channel 530. At the same time, it is also possible to omit the structural members defining the third discharge channel 530 at both ends of the third discharge channel 530 in the first direction, thereby further simplifying the structure of the battery pack 1000.

[0148] At the same time, by fixing the third thermal insulation member 410 on the second cavity wall 112, the second cavity wall 112 and the battery pack 200 can also be separated to prevent heat from being transferred to the second cavity wall 112 during pressure relief of the battery pack 200, that is, to prevent heat from being directly transferred to the outer shell 100, thereby improving the safety of the battery pack 1000.

[0149] In some embodiments, the third thermal insulation member 410 is formed as a mica board, so that while the third thermal insulation member 410 is formed as an insulation board, the high temperature resistance effect of the third thermal insulation member 410 can also be guaranteed, thereby ensuring the thermal insulation effect of the third thermal insulation member 410.

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

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

[0152] In some embodiments, the pressure relief structures 211 of two adjacent electrically connected battery cells 210 of at least one group of battery packs 200 are respectively arranged on both sides of the battery pack 200 in the second direction, and the poles of two adjacent electrically connected battery cells 210 of at least one group of battery packs 200 are respectively arranged on both sides of the battery pack 200 in the second direction. In this way, two adjacent electrically connected battery cells 210 can be connected in series, so as to reduce the difficulty of connecting the two adjacent electrically connected battery cells 210, thereby reducing the difficulty of assembling the battery pack 1000.

[0153] Of course, in some other embodiments, when a parallel connection needs to be formed between two adjacent electrically connected battery cells 210, the poles of two adjacent electrically connected battery cells 210 of the same battery pack 200 can also be arranged on the same side of the battery pack 200 in the second direction, and this application does not make specific restrictions.

[0154] In some embodiments, in combination Figure 1 , Figure 6 and Figure 7 As shown, the battery pack 200 includes a plurality of rows of battery rows 220 arranged in sequence along a first direction, and each row of battery rows 220 includes a plurality of battery cells 210 arranged in sequence along a third direction, and the first direction and the second direction are respectively perpendicular to the third direction. The above arrangement can realize the rational utilization of the space in the housing 100, so that a large number of battery cells 210 can be arranged in the housing 100, thereby facilitating the improvement of the capacity of the battery pack 1000 and ensuring the working performance of the battery pack 1000.

[0155] In some embodiments, Figure 7 As shown, the battery cell 210 is a cylindrical battery, and the axial direction of the cylindrical battery is parallel to the second direction. In this way, the battery cell 210 can be placed in a lying position in the housing 100. Compared with the prior art in which the battery cell 210 is placed vertically in the housing 100, the height of the battery pack 1000 can be increased, thereby increasing the number of battery rows 220 and improving the capacity of the battery pack 1000.

[0156] At the same time, by configuring the battery cell 210 as a cylindrical battery, the operating performance and reliability of the battery cell 210 can be guaranteed to a certain extent, thereby ensuring the operating performance of the battery pack 1000 .

[0157] In addition, by setting the axial direction of the cylindrical battery to be parallel to the second direction, the pressure relief structure 211 of the battery cell 210 can be set directly opposite the discharge channel, reducing the difficulty of pressure relief of the battery cell 210 and ensuring the safety of the battery cell 210.

[0158] In some embodiments, Figure 8 As shown, the battery cells 210 of two adjacent rows of battery rows 220 are staggered in the third direction. The staggered arrangement here means that the projections of the axes of the battery cells 210 of the two adjacent rows of battery rows 220 on the first cavity wall 111 and / or the second cavity wall 112 do not overlap, so that in the first direction, the battery cells 210 of one row of battery rows 220 can be arranged directly between two adjacent battery cells 210 of another row. Since the battery cells 210 are formed as cylindrical batteries, the space between two adjacent battery cells 210 can be reasonably utilized, so that part of the structure of the battery cells 210 of one row of battery rows 220 can be located between two adjacent battery cells 210 of another row, thereby reducing the size of the battery pack 1000 in the first direction, which is conducive to reducing the occupied space of the battery pack 1000 and reducing the difficulty of installing the battery pack 1000.

[0159] In some embodiments, in combination Figure 6 and Figure 7 As shown, the battery pack 200 further includes a mounting bracket 600, and the mounting bracket 600 is provided on at least one of the two sides of the multiple battery rows 220 in the first direction, and the mounting bracket 600 is sealed and connected to the corresponding first cavity wall 111, and a plurality of mounting grooves 610 arranged in sequence along the third direction are formed on the side of the mounting bracket 600 facing the battery row 220, and the plurality of battery cells 210 of the battery row 220 are respectively limited and matched in the corresponding mounting grooves 610. It can also be understood here that the same battery pack 200 is provided with a mounting bracket 600 on at least one of the two sides in the first direction, and the mounting bracket 600 is sealed and connected to the corresponding first cavity wall 111, and the plurality of battery cells 210 are respectively limited and matched in the corresponding mounting grooves 610, so as to realize the sealed connection between the battery cells 210 and the first cavity wall 111, so as to facilitate the use of the first cavity wall 111 and the mounting bracket 600 to cooperate in supporting the battery cells 210, ensure the position stability of the battery cells 210, and help ensure the structural strength of the battery pack 1000.

[0160] That is to say, the present application provides a mounting bracket 600 , which is mainly used to fix the battery cell 210 to ensure the position stability of the battery cell 210 .

[0161] It should be noted that, since the battery pack 200 also includes a mounting bracket 600, when the second thermal insulation member 320 is clamped between the battery pack 200 and the first cavity wall 111 and needs to be sealed and connected to the battery pack 200, the second thermal insulation member 320 can be sealed and connected to the mounting bracket 600. In this way, while achieving a sealed connection between the second thermal insulation member 320 and the battery pack 200, it can also reduce the difficulty of connecting the second thermal insulation member 320 and the battery pack 200, and avoid damage to the battery cell 210 during the connection, so as to extend the service life of the battery pack 200 and ensure the safety of the battery pack 200.

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

[0163] Optionally, combined Figure 1 , Figure 4 and Figure 7 As shown, part of the first connecting member 810 is disposed between the mounting bracket 600 and the second thermal insulation member 320 to achieve a sealed connection between the second thermal insulation member 320 and the mounting bracket 600 , and further achieve a sealed connection between the second thermal insulation member 320 and the battery pack 200 .

[0164] In some embodiments, in combination Figure 6 and Figure 7 As shown, a second connecting member 820 is provided between the battery cell 210 and the mounting groove 610. The second connecting member 820 is used to realize a fixed connection between the battery cell 210 and the mounting bracket 600, so as to achieve the purpose of supporting the battery cell 210 by the mounting bracket 600. At the same time, it can also improve the position stability of the battery cell 210 to ensure the working performance of the battery cell 210.

[0165] In some embodiments, the first connector 810 and the second connector 820 are both formed as connecting glue, which is used to achieve a sealed connection between the mounting bracket 600 and the corresponding first cavity wall 111 and a fixed connection between the battery cell 210 and the mounting bracket 600, thereby ensuring the connection strength between the mounting bracket 600 and the first cavity wall 111 and the connection strength between the battery cell 210 and the mounting bracket 600, so that the relative positions of the structural parts of the battery pack 1000 are stable.

[0166] In some embodiments, in combination Figure 6 and Figure 7 As shown, mounting brackets 600 are respectively provided on both sides of the multiple rows of battery rows 220 in the first direction, and the mounting brackets 600 on both sides of the multiple rows of battery rows 220 in the first direction are fixedly connected. Among them, by providing mounting brackets 600 on both sides of the multiple rows of battery rows 220 in the first direction, both sides of the same battery group 200 in the first direction are sealed and connected to the corresponding first cavity wall 111, so as to achieve the purpose of supporting the battery group 200 with the first cavity wall 111, and improve the position stability of the battery group 200.

[0167] At the same time, by fixedly connecting the mounting brackets 600 on both sides of the multiple rows of battery rows 220 in the first direction, it is convenient to utilize the mounting brackets 600 on both sides to cooperate in supporting the multiple rows of battery rows 220, thereby improving the positional stability of the multiple rows of battery rows 220, and further improving the positional stability of the battery cells 210, so as to ensure the working performance of the battery cells 210.

[0168] In some embodiments, multiple rows of battery rows 220 are connected by bolts between the mounting brackets 600 on both sides in the first direction to achieve a fixed connection of the mounting brackets 600 on both sides and reduce the difficulty of connection. At the same time, the mounting brackets 600 on both sides can also form a detachable connection to facilitate maintenance of the battery cells 210 arranged in the mounting brackets 600.

[0169] In some embodiments, Figure 6 As shown, the battery pack 1000 further includes a heat exchanger 700, which is disposed between two adjacent rows of battery rows 220 and exchanges heat with the two adjacent rows of battery rows 220. The purpose of adjusting the temperature of the battery rows 220 is achieved, that is, the purpose of adjusting the temperature of the battery cells 210 is achieved, so that the temperature of the battery cells 210 during operation can be maintained within a suitable temperature range, ensuring the safety of the battery cells 210, and at the same time ensuring the working performance of the battery cells 210.

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

[0171] Alternatively, if Figure 6 As shown, the battery pack 1000 further includes a conveying member 730 , and the conveying member 730 is used to convey the heat exchange medium toward the heat exchange member 700 to ensure the heat exchange effect of the heat exchange member 700 .

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

[0173] At the same time, the above arrangement also allows a heat exchange component 700 to simultaneously perform heat exchange with two adjacent rows of battery rows 220, thereby achieving the goal of adjusting the temperature of the battery rows 220 and reducing the number of heat exchange components 700 used, thereby reducing the cost of using the heat exchange components 700.

[0174] In some embodiments, the heat exchange element 700 is fixedly connected to each battery cell 210 of two adjacent rows of battery rows 220. While the relative positions of the multiple battery cells 210 of the two adjacent rows of battery rows 220 are stabilized, the relative positions of the heat exchange element 700 and the adjacent battery cells 210 can also be stabilized to ensure the heat exchange effect of the heat exchange element 700.

[0175] In some embodiments, Figure 6 As shown, a third connecting member 830 is provided between the heat exchange member 700 and each battery cell 210 of the battery row 220. The third connecting member 830 is used to achieve a fixed connection between the heat exchange member 700 and the battery cell 210, so that the position of the heat exchange member 700 relative to the battery cell 210 is stable, thereby facilitating the use of the heat exchange member 700 to dissipate heat from the battery cell 210.

[0176] In some embodiments, the third connector 830 is formed as a connecting glue, which can not only achieve a fixed connection between the heat exchange component 700 and the battery cell 210, but also ensure the connection strength between the heat exchange component 700 and the battery cell 210 and reduce the difficulty of connecting the heat exchange component 700 and the battery cell 210.

[0177] In summary, the various components of the battery pack 1000 of the present application are bonded together, which, compared to the prior art of pouring foam glue into the battery pack 1000 and setting a screw structure, can enable the battery cell 210 to be firmly arranged in the outer shell 100 while effectively reducing the weight of the battery pack 1000, thereby achieving lightweight battery pack 1000, reducing the cost of the battery pack 1000, and ensuring the heat dissipation efficiency of the battery cell 210.

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

[0179] In some embodiments, in combination Figure 6 and Figure 8As shown, the battery cells 210 are cylindrical batteries, the axial direction of the cylindrical batteries is parallel to the second direction, the battery cells 210 of two adjacent rows of battery rows 220 are staggered one by one in the third direction, and the heat exchange element 700 includes a plurality of first protrusions 710 and a plurality of second protrusions 720, which are alternately arranged one by one along the third direction, the first protrusions 710 protrude toward one of the two adjacent rows of battery rows 220, and the second protrusions 720 protrude toward the other of the two adjacent rows of battery rows 220. In this way, grooves with different concave directions can be formed on opposite sides of the heat exchange element 700, and different grooves are used to fix the two adjacent rows of battery rows 220, so that the heat exchange element 700 can be fixedly connected to each battery cell 210 of the two adjacent rows of battery rows 220, so that the relative position of the heat exchange element 700 and the adjacent battery cells 210 is stable, so as to ensure the heat exchange effect of the heat exchange element 700.

[0180] At the same time, by arranging a plurality of first protrusions 710 and a plurality of second protrusions 720 on the heat exchange component 700, it is also possible to stagger the battery cells 210 of two adjacent rows of battery rows 220 one by one in the third direction, so that in two adjacent rows of battery rows 220, a partial structure of the battery cells 210 of one row of battery rows 220 can be located between two adjacent battery cells 210 of the other row, thereby reducing the size of the battery pack 1000 in the first direction, which is beneficial to reducing the space occupied by the battery pack 1000 and reducing the difficulty of installing the battery pack 1000.

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

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

[0183] The battery pack 1000 is the aforementioned battery pack 1000 , and the specific structure of the battery pack 1000 is not described in detail herein.

[0184] It can be seen from the above structure that the electric device according to the embodiment of the present invention improves the safety of use of the electric device by adopting the aforementioned battery pack 1000 .

[0185] It should be noted that the electrical device of the present application may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc.

[0186] Among them, when the electrical device is a vehicle, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

[0187] In some embodiments, a battery pack 1000 is provided in the vehicle. The battery pack 1000 can be disposed at the bottom, head or tail of the vehicle. The battery pack 1000 can be used to power the vehicle. For example, the battery pack 1000 can serve as an operating power source for the vehicle.

[0188] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0189] Figure 6 and Figure 7 It is shown that two rows of battery rows 220 are arranged in sequence in the first direction for illustrative purposes, but after reading the above technical solution, ordinary technicians can obviously understand that the solution can be applied to the technical solution of three, four or more rows of battery rows 220, which also falls within the protection scope of the present invention.

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

[0191] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A battery pack, characterized in that: include: A housing, wherein at least one accommodating cavity is formed in the housing, and the accommodating cavity has two first cavity walls arranged opposite to each other along a first direction; A battery pack, wherein at least one of the accommodating chambers is provided with at least two groups of the battery packs spaced apart along a second direction, each group of the battery packs includes a plurality of battery cells, and the first direction intersects with the second direction; A first thermal insulation structure, wherein the two ends of the first thermal insulation structure in the first direction are respectively sealed and connected to the two first cavity walls, and the first thermal insulation structure includes a first thermal insulation member and a second thermal insulation member that are connected, the first thermal insulation member is arranged between two adjacent groups of the battery packs to separate the space between the two adjacent groups of the 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 of one of the two adjacent groups of the battery packs, and the second discharge channel is connected to the pressure relief structure of at least one battery cell of the other of the two adjacent groups of the battery packs, at least one of the two ends of the first thermal insulation member in the first direction is provided with at least one second thermal insulation member, and the second thermal insulation member is clamped between the first cavity wall and the battery pack that is adhesively fixed to the first cavity wall by an adhesive member.

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

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

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

5. The battery pack according to claim 1, characterized in that: The second thermal insulation member 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 thermal insulation member and the battery pack is greater than 10 mm.

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

8. The battery pack according to claim 1, characterized in that: At least one of the two adjacent battery groups is bonded to at least one of the two first cavity walls; and / or, The first heat insulating structure is bonded to at least one of the two first cavity walls.

9. The battery pack according to claim 1, characterized in that: All of the pressure relief structures of at least one group of the battery packs are respectively arranged on both sides of the battery pack in the second direction, and the accommodating cavity also has two second cavity walls arranged opposite to each other along the second direction. The battery pack and the second cavity walls are spaced apart so that a third discharge channel is provided between the battery pack and the second cavity wall, and the third discharge channel is connected to part of the pressure relief structures of the battery pack adjacent to the second cavity wall.

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

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

12. The battery pack according to claim 10, characterized in that: The battery pack further includes a second thermal insulation structure, which is sealed and connected to at least one of the two first cavity walls, so that at least one of the two first cavity walls participates in defining the third exhaust channel.

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

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

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

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

18. The battery pack according to claim 15, characterized in that: The battery pack also includes a mounting bracket, and the mounting bracket is provided on at least one of the two sides of the multiple rows of battery rows in the first direction, and the mounting bracket is sealed and connected to the corresponding first cavity wall. A plurality of mounting grooves arranged in sequence along the third direction are formed on the side of the mounting bracket facing the battery row, and the plurality of battery cells of the battery row are respectively limited and fitted in the corresponding mounting grooves.

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

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

21. The battery pack according to claim 20, characterized in that: The heat exchange element is fixedly connected to each of the battery cells in two adjacent rows of batteries.

22. The battery pack according to claim 20, characterized in that: The battery cells are cylindrical batteries, the axial direction of the cylindrical batteries is parallel to the second direction, the battery cells of two adjacent rows of the battery rows are staggered one by one in the third direction, the heat exchange member includes a plurality of first protrusions and a plurality of second protrusions, the plurality of first protrusions and the plurality of second protrusions are alternately arranged one by one along the third direction, the first protrusions protrude toward one of the two adjacent rows of the battery rows, and the second protrusions protrude toward the other of the two adjacent rows of the battery rows.

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

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