Battery pack and electric device

Abstract

The embodiment of the utility model relates to the technical field of batteries, and particularly discloses a battery pack and a power utilization device.The battery pack comprises a box body, the box body comprises a bottom plate, an edge beam and a first supporting part, the edge beam is arranged around the edge of the bottom plate, the bottom plate and the edge beam are matched to define a containing cavity, and the first supporting part is arranged on the side, close to the containing cavity, of the edge beam in a protruding mode; a fixing groove is formed in the first supporting part; the first battery assembly comprises a first bearing piece and a plurality of first single batteries, the first single batteries are arranged on the side, away from the bottom plate, of the first bearing piece, and the first bearing piece is connected to the first supporting part; the first locking piece is arranged in the fixing groove; the second locking piece is arranged on the first bearing piece in a penetrating mode so as to be fixedly connected with the first locking piece, and therefore the first bearing piece is locked and fixed. According to the battery pack, the structural stability of the first battery assembly is guaranteed, the overall structural stability of the battery pack is guaranteed, and normal use of the battery pack is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] The replacement of traditional fuel vehicles with new energy vehicles is crucial for addressing energy and pollution challenges facing the global transportation industry and represents an inevitable trend. With the rapid development of the new energy industry, battery packs with high capacity, long cycle life, and superior safety performance have gained widespread application and development. Simultaneously, there is an urgent need for battery packs with greater capacity, greater durability, and improved safety. As one of the core performance characteristics of battery packs, improving their structural stability has become a pressing issue. Utility Model Content

[0003] Embodiments of the present application provide a battery pack and an electrical device to improve the structural stability of the battery pack.

[0004] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In one aspect, a battery pack is provided, comprising: a box body, the box body comprising: a bottom plate, a side beam, and a first support portion, the side beam being arranged around an edge of the bottom plate, and the bottom plate and the side beam cooperating to enclose a receiving cavity, the first support portion being protrudingly arranged and connected to a side of the side beam adjacent to the receiving cavity, and having a fixing groove formed on the first support portion;

[0006] A first battery assembly is disposed in the accommodating cavity, the first battery assembly comprising: a first supporting member and a plurality of first single cells, the plurality of first single cells being disposed on a side of the first supporting member away from the bottom plate, and the first supporting member being connected to the first supporting portion;

[0007] A first locking member is disposed in the fixing groove and is fixedly connected to the first supporting portion; and

[0008] The second locking member is passed through the first supporting member and is fixedly connected to the first locking member to lock and fix the first supporting member.

[0009] In addition to or as an alternative to one or more of the features disclosed above, the first supporting member is provided with a first fixing hole, and the first locking member is provided with a second fixing hole;

[0010] The second locking member is passed through the first fixing hole and the second fixing hole to lock and fix the first supporting member.

[0011] In addition to or as an alternative to one or more features disclosed above, the battery pack has a first direction and a second direction intersecting each other;

[0012] A limiting wall is provided on one side of the first supporting portion close to the first supporting member, and the limiting wall is located in the circumferential area of ​​the fixing groove;

[0013] The first locking member includes: two first side walls arranged opposite to each other in a first direction, and a second side wall and a third side wall arranged opposite to each other in a second direction, the second side wall being arranged relative to the third side wall and close to the limiting wall, the first side wall, the second side wall and the third side wall enclosing a locking cavity, the second fixing hole being formed in the second side wall and communicating with the locking cavity;

[0014] The second locking member is passed through the first fixing hole and the second fixing hole to locate part of the second locking member in the locking cavity, and the second locking member is connected to the second side wall to abut the second side wall against the limiting wall to lock and fix the first supporting member.

[0015] In addition to or as an alternative to one or more of the features disclosed above, the first support portion includes: a first sub-support portion, the first sub-support portion extending along the first direction, and the first sub-support portion is protrudingly arranged and connected to a side of the side beam close to the accommodating cavity; and

[0016] The second sub-support part is connected to a side of the first sub-support part close to the accommodating cavity. The fixing groove is provided in the second sub-support part. The first supporting member is connected to the second sub-support part.

[0017] In addition to or as an alternative to one or more of the features disclosed above, a plurality of second sub-support portions are provided, each of the plurality of second sub-support portions is connected to a side of the first sub-support portion close to the accommodating cavity, and the plurality of second sub-support portions are spaced apart in the first direction, and each second sub-support portion is provided with a fixing groove;

[0018] There are multiple first locking members and multiple second locking members, each first locking member is respectively arranged in a corresponding fixing groove, and the first supporting member is provided with multiple first fixing holes;

[0019] Each second locking member is inserted into a corresponding first fixing hole and a corresponding second fixing hole, and each second locking member is riveted to a corresponding first locking member to lock and fix the first supporting member.

[0020] In addition to or as an alternative to one or more of the features disclosed above, the box body further comprises: a second support portion, the second support portion being protrudingly arranged and connected to a side of the side beam close to the accommodating cavity, and the second support portion being arranged closer to the bottom plate relative to the first support portion;

[0021] The battery pack also includes: a second battery assembly, which is arranged in the accommodating cavity. The second battery assembly includes: a second supporting member and a plurality of second single batteries. The plurality of second single batteries are arranged on a side of the second supporting member away from the bottom plate, and the second supporting member is connected to the second supporting portion.

[0022] In addition to or as an alternative to one or more of the features disclosed above, a third fixing hole is formed on the second supporting portion;

[0023] The battery pack further includes: a third locking member, which is disposed on the second supporting member and passes through the third fixing hole. The third locking member is fixedly connected to the second supporting portion to lock and fix the second supporting member.

[0024] In addition to or as an alternative to one or more of the features disclosed above, a first exhaust channel and a second exhaust channel are opened in the side beam, and the first exhaust channel and the second exhaust channel are separately arranged;

[0025] A first pressure relief portion is provided on a side of the first single battery cell facing the first supporting member, a first exhaust cavity is defined in the first supporting member, the first pressure relief portion is used to communicate with the first exhaust cavity, and the first exhaust cavity is communicated with the first exhaust channel;

[0026] A second pressure relief portion is provided on the side of the second single battery facing the second supporting member. A second exhaust cavity is provided in the second supporting member. The second pressure relief portion is used to communicate with the second exhaust cavity, and the second exhaust cavity is communicated with the second exhaust channel.

[0027] In addition to or as an alternative to one or more of the features disclosed above, a first exhaust port and a second exhaust port are provided on the side beam, the first exhaust port is communicated with the first exhaust passage, and the second exhaust port is communicated with the second exhaust passage;

[0028] The battery pack further includes: a plurality of explosion-proof valves, which are respectively sealed on the first exhaust port and the second exhaust port.

[0029] On the other hand, an electrical device is further disclosed. In addition to or instead of one or more of the features disclosed above, the electrical device includes a battery pack as described in any one of the above items, and the battery pack serves as a power supply for the electrical device.

[0030] One of the above technical solutions has the following advantages or beneficial effects: In this application, a fixing groove is opened on the first support part, the first locking part is embedded in the fixing groove and the first locking part is fixedly connected to the first support part, the second locking part is passed through the first supporting part, and the second locking part is fixedly connected to the first locking part to achieve positioning and fixation of the first supporting part, thereby positioning and fixing the first battery assembly, ensuring the structural stability of the first battery assembly, ensuring the overall structural stability of the battery pack, and ensuring the normal use of the battery pack.

[0031] At the same time, the present application provides a first support portion on the box body, and the first supporting member is connected to the first support portion, so as to utilize the first support portion to support and fix the first battery assembly, thereby increasing the convenience of connecting the first battery assembly with the side beam of the box body, avoiding the first battery assembly being directly connected to the side beam of the box body to affect the overall sealing of the box body, thereby ensuring the overall sealing of the box body, and then ensuring the overall sealing performance of the battery pack, thereby reducing the impact of external components on the components inside the battery pack, extending the service life of the components in the battery pack, extending the service life of the battery pack, and ultimately improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0033] Figure 1 is a three-dimensional structural view of a battery pack provided according to an embodiment of the present application;

[0034] Figure 2 is a top view of a battery pack provided according to an embodiment of the present application;

[0035] Figure 3 is a cross-sectional view of a battery pack along the AA direction according to an embodiment of the present application;

[0036] Figure 4 This is a three-dimensional structural view of the box provided according to an embodiment of the present application;

[0037] Figure 5 yes Figure 4 A partial enlarged view of point D in the middle;

[0038] Figure 6 is a top view of a box provided according to an embodiment of the present application;

[0039] Figure 7 is a cross-sectional view of the box along the BB direction provided by an embodiment of the present application;

[0040] Figure 8 is a cross-sectional view of a box along the CC direction provided by an embodiment of the present application;

[0041] Figure 9 1 is a schematic structural diagram of a first battery assembly, a second battery assembly, and a second beam provided according to an embodiment of the present application;

[0042] Figure 10 is a schematic structural diagram of a second beam provided according to an embodiment of the present application;

[0043] Figure 11 is a three-dimensional structural view of a first battery assembly provided according to an embodiment of the present application;

[0044] Figure 12 is a top view of a first battery assembly provided according to an embodiment of the present application;

[0045] Figure 13 is a partial cross-sectional view of a first battery assembly provided according to an embodiment of the present application;

[0046] Figure 14 yes Figure 13 A partial enlarged view of point E in the middle;

[0047] Figure 15 is a three-dimensional structural view of a second battery assembly provided according to an embodiment of the present application;

[0048] Figure 16 is a three-dimensional structural view of a second battery assembly from another perspective according to an embodiment of the present application;

[0049] Figure 17 is a partial cross-sectional view of a second battery assembly provided according to an embodiment of the present application;

[0050] Figure 18 yes Figure 17 A partial enlarged view of point F in the middle.

[0051] Description of reference numerals:

[0052] 100. Battery pack;

[0053] 110. Box body; 111. Bottom plate; 112. Side beam; 1121. First beam; 1122. Second beam; 1123. Third beam; 1124. Fourth beam; 1125. First exhaust channel; 1126. Second exhaust channel; 1127. First exhaust port; 1128. Second exhaust port; 113. Second support portion; 1131. Third fixing hole; 114. First support portion; 1141. First sub-support portion; 1142. Second sub-support portion; 1143. Fixing groove; 1144. Limiting wall; 115. Accommodating cavity;

[0054] 120, second battery assembly; 121, second supporting member; 1211, hot melt portion; 1212, second hanging ring portion; 1213, second vent cavity; 122, second single battery; 1221, second pressure relief portion;

[0055] 130, first battery assembly; 131, first supporting member; 1311, first fixing hole; 1312, first hanging ring; 1313, first exhaust cavity; 132, first single battery; 1321, first pressure relief portion;

[0056] 140, third locking member;

[0057] 150, first locking member; 151, second fixing hole; 152, first side wall; 153, second side wall; 154, third side wall; 155, locking cavity;

[0058] 160, second locking member;

[0059] 170, box cover;

[0060] 180. Explosion-proof valve. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for the purpose of explaining this application and are not intended to limit this application.

[0062] In the description of the present application, 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" 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "first" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "first" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0063] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0064] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a first feature may include the first and first features being in direct contact, or may include the first and first features being in contact not directly but through another feature between them. Moreover, a first feature being “above,” “above,” and “above” a first feature may include the first feature being directly above and obliquely above the first feature, or may simply mean that the first feature is higher in level than the first feature. A first feature being “below,” “below,” and “below” a first feature may include the first feature being directly above and obliquely above the first feature, or may simply mean that the first feature is lower in level than the first feature.

[0065] The existing battery pack box is generally provided with a support portion to support the battery pack, but in order to ensure the capacity of the battery pack, the width of the support portion is generally ( Figure 1 The third direction (X) is designed to be smaller, reducing the space occupied by the support part. However, the size of the support part is designed to be small, which makes it inconvenient to achieve a firm connection on the support part through a conventional fixing structure (such as screws), thereby making it inconvenient to connect and fix the battery pack, and is not conducive to the support of the battery pack by the support part, affecting the structural stability of the battery pack, and further affecting the overall structural stability of the battery pack.

[0066] In order to solve the above problems, in the embodiments of the present application, referring to Figures 1 to 18 The present application provides a battery pack 100 having a first direction Y, a second direction Z, and a third direction X that intersect each other. Exemplarily, the battery pack 100 has the first direction Y, the second direction Z, and the third direction X that are perpendicular to each other. "Perpendicular" refers to a state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°.

[0067] Specifically, the battery pack 100 includes a box body 110 , a first battery assembly 130 , a first locking member 150 , a second locking member 160 and a box cover 170 .

[0068] Specifically, the box body 110 includes: a bottom plate 111, a side beam 112 and a first support portion 114. The side beam 112 is arranged around the edge of the bottom plate 111, and the bottom plate 111 and the side beam 112 cooperate to enclose a receiving cavity 115. The first support portion 114 is protruding and connected to the side of the side beam 112 close to the receiving cavity 115, and a fixing groove 1143 is opened on the first support portion 114; the first battery assembly 130 is arranged in the receiving cavity 115, and the first battery assembly 130 includes: a first supporting member 131 and a plurality of first single batteries 132 A plurality of first single batteries 132 are arranged on a side of the first supporting member 131 away from the bottom plate 111, and the first supporting member 131 is connected to the first support portion 114; the first locking member 150 is arranged in the fixing groove 1143, and the first locking member 150 is fixedly connected to the first support portion 114; the second locking member 160 passes through the first supporting member 131, and the second locking member 160 is fixedly connected to the first locking member 150 to lock and fix the first supporting member 131; the box cover 170 is connected to the box body 110 to seal the box body 110.

[0069] The bottom plate 111 and the side beams 112 are both made of ordinary steel or aluminum, but are not limited thereto.

[0070] The box cover 170 is made of metal, but is not limited thereto.

[0071] The side beam 112 and the first support portion 114 can be integrally formed, that is, the side beam 112 and the first support portion 114 are an integral structure. For example, the side beam 112 and the first support portion 114 are integrally die-cast. The side beam 112 and the first support portion 114 can also be provided separately and fixedly connected. For example, the first support portion 114 is fixedly connected to the side beam 112 by a welding process. This is not specifically limited in this application and can be specifically configured according to actual circumstances.

[0072] The first single cell 132 may be a secondary battery. A secondary battery is a battery that can be recharged to activate its active material after discharge and continue to be used. For example, the first single cell 132 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, or a nickel-cadmium battery, but is not limited thereto.

[0073] The first battery cell 132 may be a prismatic battery, a soft-pack battery, or a battery in another shape. For example, in the present application, the first battery cell 132 is a cylindrical battery.

[0074] The first cell 132 includes an electrode assembly, an electrolyte, a housing, end caps, terminals, and other functional components. The electrolyte can be a conventional electrolyte or a special electrolyte with additives. The electrolyte is used to soak the electrode assembly. The electrode assembly is the component in the first cell 132 where the electrochemical reaction occurs, and there can be one or more electrode assemblies. The electrode assembly is primarily formed by stacking or winding a positive electrode sheet, a separator, and a negative electrode sheet. The portions of the positive and negative electrodes containing active material constitute the electrode body, while the portions of the positive and negative electrodes without active material each constitute the tabs. During the charge and discharge process of the first cell 132, the positive and negative electrode active materials react with the electrolyte, electrically connecting the tabs to the terminals to form a current circuit, enabling normal operation of the first cell 132.

[0075] The second locking member 160 may be a bolt or a rivet stud, but is not limited thereto. For example, in this application, the second locking member 160 is a rivet stud.

[0076] It can be understood that in the present application, a fixing groove 1143 is opened on the first support portion 114, the first locking member 150 is embedded in the fixing groove 1143 and the first locking member 150 is fixedly connected to the first support portion 114, the second locking member 160 is passed through the first supporting member 131, and the second locking member 160 is fixedly connected to the first locking member 150, so as to realize the positioning and fixation of the first supporting member 131, thereby positioning and fixing the first battery assembly 130, ensuring the structural stability of the first battery assembly 130, ensuring the overall structural stability of the battery pack 100, and ensuring the normal use of the battery pack 100. In this way, when the internal space of the battery pack 100 is limited, the internal effective space of the battery pack 100 can be increased as much as possible (that is, more space can be left for the single batteries as much as possible). That is to say, on the basis that the size of the first support part 114 along the third direction X is relatively small, the first supporting part 131 can be positioned and fixed more conveniently by the fixing groove 1143 on the first support part 114 and the first locking member 150 and the second locking member 160, thereby ensuring the overall structural stability of the battery pack 100 and ensuring the normal use of the battery pack 100.

[0077] At the same time, the present application provides a first support portion 114 on the box body 110, and the first supporting member 131 is connected to the first support portion 114, so as to utilize the first support portion 114 to support and fix the first battery assembly 130, thereby increasing the convenience of connecting the first battery assembly 130 with the side beam 112 of the box body 110, avoiding the first battery assembly 130 being directly connected to the side beam 112 of the box body 110 to affect the overall sealing of the box body 110, thereby ensuring the overall sealing of the box body 110, and then ensuring the overall sealing performance of the battery pack 100, thereby reducing the impact of external components on the components in the battery pack 100, extending the service life of the components in the battery pack 100, extending the service life of the battery pack 100, and ultimately improving the safety performance of the battery pack 100.

[0078] In one embodiment, the fixing groove 1143 is open toward one side of the first single battery cell 132 (in the prior art, screws alone are ineffective for securing the battery and cannot guarantee a stable connection to the first supporting member 131). This allows the first support portion 114 to have a smaller dimension along the third direction X, while also enabling the first supporting member 131 to be conveniently positioned and secured by the fixing groove 1143 on the first support portion 114 and the first and second locking members 150 and 160. This ensures the overall structural stability of the battery pack 100 and ensures its normal operation.

[0079] In one embodiment, referring to Figures 4 to 10 In order to ensure the structural stability of the first battery assembly 130 in the battery pack 100, in the present application, a first fixing hole 1311 is formed on the first supporting member 131, and a second fixing hole 151 is formed on the first locking member 150; the second locking member 160 is passed through the first fixing hole 1311 and the second fixing hole 151, and the second locking member 160 is fixedly connected to the first locking member 150 to lock and fix the first supporting member 131.

[0080] The first fixing hole 1311 and the second fixing hole 151 are both circular, but the present invention is not limited thereto.

[0081] It can be understood that in the present application, a first fixing hole 1311 is opened through the first supporting member 131, and a second fixing hole 151 is opened in the first locking member 150, so that the second locking member 160 is passed through the first fixing hole 1311 and the second fixing hole 151 to fix the second locking member 160 to the first locking member 150, and the first supporting member 131 is locked and fixed to achieve positioning and fixation of the first supporting member 131, thereby positioning and fixing the first battery assembly 130, ensuring the structural stability of the first battery assembly 130, ensuring the overall structural stability of the battery pack 100, and ensuring the normal use of the battery pack 100.

[0082] In one embodiment, in order to ensure the structural stability of the first battery assembly 130 in the battery pack 100, in this application, reference is made to Figures 4 to 10 A limiting wall 1144 is provided on one side of the first supporting portion 114 close to the first supporting member 131 , and the limiting wall 1144 is located in the circumferential area of ​​the fixing groove 1143 , that is, the limiting wall 1144 is a partial groove wall constituting the fixing groove 1143 .

[0083] Specifically, the first locking member 150 includes: two first side walls 152 arranged opposite to each other in the first direction Y, and a second side wall 153 and a third side wall 154 arranged opposite to each other in the second direction Z, the second side wall 153 is arranged relative to the third side wall 154 close to the limiting wall 1144, the first side wall 152, the second side wall 153 and the third side wall 154 enclose a locking cavity 155, the second fixing hole 151 is opened on the second side wall 153, and the second fixing hole 151 is connected to the locking cavity 155.

[0084] Specifically, the second locking member 160 is passed through the first fixing hole 1311 and the second fixing hole 151 to locate part of the second locking member 160 in the locking cavity 155, and the second locking member 160 is connected to the second side wall 153 to abut the second side wall 153 against the limiting wall 1144 to lock and fix the first supporting member 131.

[0085] It can be understood that in the present application, a limiting wall 1144 is provided on the first support portion 114 so that when the second locking member 160 connects and fixes the first locking member 150, the first support portion 114, and the first supporting member 131, the second side wall 153 of the first locking member 150 abuts against the limiting wall 1144 to achieve positioning and fixation of the first supporting member 131, thereby positioning and fixing the first battery assembly 130, ensuring the structural stability of the first battery assembly 130, ensuring the overall structural stability of the battery pack 100, and ensuring the normal use of the battery pack 100.

[0086] In one embodiment, referring to Figures 4 and 5 The first support portion 114 includes: a first sub-support portion 1141 and a second sub-support portion 1142; the first sub-support portion 1141 extends along the first direction Y, and the first sub-support portion 1141 is protrudingly arranged and connected to the side of the side beam 112 close to the accommodating cavity 115; the second sub-support portion 1142 is connected to the side of the first sub-support portion 1141 close to the accommodating cavity 115, the fixing groove 1143 is opened on the second sub-support portion 1142, and the first supporting member 131 is connected to the second sub-support portion 1142.

[0087] Among them, the first sub-support portion 1141 and the second sub-support portion 1142 can be integrally formed, that is, the first sub-support portion 1141 and the second sub-support portion 1142 are an integral structure, and the first sub-support portion 1141 and the second sub-support portion 1142 are exemplarily integrally die-cast; the first sub-support portion 1141 and the second sub-support portion 1142 can also be separately provided, and the two are fixedly connected, and exemplarily, the second sub-support portion 1142 is fixedly connected to the first sub-support portion 1141 by a welding process. This is not specifically limited in this application and can be specifically set according to actual circumstances. For example, in this application, the first sub-support portion 1141 and the second sub-support portion 1142 are integrally formed to facilitate the processing and forming of the box body 110.

[0088] It can be understood that the present application connects the first supporting member 131 to the second sub-support portion 1142 to facilitate the connection and fixation of the first supporting member 131, thereby facilitating the limiting and fixation of the first battery assembly 130, ensuring the overall structural stability of the battery pack 100, and ensuring the normal use of the battery pack 100.

[0089] In one embodiment, referring to Figures 4 to 10 There are multiple second sub-support parts 1142, and the multiple second sub-support parts 1142 are all connected to the side of the first sub-support part 1141 close to the accommodating cavity 115, and the multiple second sub-support parts 1142 are arranged at intervals in the first direction Y, and each second sub-support part 1142 is provided with a fixing groove 1143.

[0090] There are multiple first locking members 150 and second locking members 160, and each first locking member 150 is respectively arranged in a corresponding fixing groove 1143. A plurality of first fixing holes 1311 are opened on the first supporting member 131; each second locking member 160 is passed through a corresponding first fixing hole 1311 and a corresponding second fixing hole 151, so as to rivet each second locking member 160 with a corresponding first locking member 150 to lock and fix the first supporting member 131, so as to firmly fix the first supporting member 131, further ensure the structural stability of the first battery assembly 130, ensure the overall structural stability of the battery pack 100, and ensure the normal use of the battery pack 100.

[0091] In one embodiment, referring to Figures 4 to 10 The box body 110 further includes: a second support portion 113 , which is protruding and connected to a side of the side beam 112 close to the accommodating cavity 115 , and the second support portion 113 is arranged close to the bottom plate 111 relative to the first support portion 114 .

[0092] The side beam 112 and the second support portion 113 can be integrally formed, that is, the side beam 112 and the second support portion 113 are an integral structure. For example, the side beam 112 and the second support portion 113 are integrally die-cast. The side beam 112 and the second support portion 113 can also be provided separately and fixedly connected. For example, the second support portion 113 is fixedly connected to the side beam 112 by a welding process. This is not specifically limited in this application and can be specifically configured according to actual circumstances.

[0093] Specifically, the battery pack 100 also includes: a second battery assembly 120, which is arranged in the accommodating cavity 115, and the second battery assembly 120 includes: a second supporting member 121 and a plurality of second single cells 122, and the plurality of second single cells 122 are arranged on a side of the second supporting member 121 away from the bottom plate 111, and the second supporting member 121 is connected to the second support portion 113.

[0094] The second cell 122 may be a secondary battery. A secondary battery is a cell that can be recharged to activate its active material after discharge and continue to be used. For example, the second cell 122 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, or a nickel-cadmium battery, but is not limited thereto.

[0095] The second battery cell 122 may be a prismatic battery, a soft-pack battery, or a battery in another shape. For example, in the present application, the second battery cell 122 is a cylindrical battery.

[0096] Other structural features of the second unit battery 122 are the same as those of the first unit battery 132 . Since the structural features of the first unit battery 132 have been described in detail above, they will not be elaborated on in detail. Please refer to the description of the first unit battery 132 .

[0097] It can be understood that the present application provides a second support portion 113 on the box body 110, and the second supporting member 121 is connected to the second support portion 113, so as to utilize the second support portion 113 to support and fix the second battery assembly 120, thereby increasing the convenience of connecting the second battery assembly 120 with the side beam 112 of the box body 110, avoiding the second battery assembly 120 being directly connected to the side beam 112 of the box body 110 to affect the overall sealing of the box body 110, further ensuring the overall sealing of the box body 110, and then ensuring the overall sealing performance of the battery pack 100, so as to reduce the impact of external components on the components in the battery pack 100, extend the service life of the components in the battery pack 100, extend the service life of the battery pack 100, and ultimately improve the safety performance of the battery pack 100.

[0098] In one embodiment, in order to ensure the structural stability of the second battery assembly 120 in the battery pack 100, in this application, reference is made to Figures 4 to 10 A third fixing hole 1131 is defined on the second supporting portion 113 .

[0099] Specifically, the battery pack also includes: a third locking member 140, the third locking member 140 is arranged on the second supporting member 121, and the third locking member 140 is passed through the third fixing hole 1131, and the third locking member 140 is fixedly connected to the second support portion 113 to lock and fix the second supporting member 121, thereby connecting and fixing the second battery assembly 120 to ensure the structural stability of the second battery assembly 120, ensure the overall structural stability of the battery pack 100, and ensure the normal use of the battery pack 100.

[0100] For example, in the present application, the third fixing hole 1131 is a threaded hole, and the third locking member 140 is a bolt, which is threadedly connected to the second support portion 113 through the third locking member 140 to connect and fix the second battery assembly 120.

[0101] In one embodiment, in order to further ensure the structural stability of the second battery assembly 120 in the battery pack 100, in this application, reference is made to Figure 16 The second supporting member 121 has a hot-melt portion 1211 on the side away from the second single battery 122. The hot-melt portion 1211 is fixed to the bottom plate 111 by hot-melt to further connect and fix the second supporting member 121, further ensure the structural stability of the second battery assembly 120, ensure the overall structural stability of the battery pack 100, and ensure the normal use of the battery pack 100.

[0102] In one embodiment, referring to Figure 8 The maximum dimension of the second support portion 113 in the third direction X is H1 mm, and the maximum dimension of the first support portion 114 in the third direction X is H2 mm, satisfying: H1>H2, that is, the maximum dimension H1 mm of the second support portion 113 in the third direction X is greater than the maximum dimension H2 mm of the first support portion 114 in the third direction X. This ensures that the first battery assembly 130 and the second battery assembly 120 can only be placed upright into the box through the open portion of the box body 110, so that the first battery assembly 130 and the second battery assembly 120 can be quickly assembled into the box body 110, thereby improving the assembly efficiency of the battery pack 100 and ultimately improving the production capacity of the battery pack.

[0103] The maximum dimension H2 mm of the first support portion 114 in the third direction X can be obtained by disassembling the actual battery pack 100, repeatedly measuring the distance between the sidewall of the side beam 112 of the box body 110 close to the accommodating cavity 115 and the sidewall of the first support portion 114 away from the side beam 112, and calculating the average value. The measuring tool can be any one of, but is not limited to, a ruler, a vernier caliper, or other dimensional measuring instrument.

[0104] The maximum dimension H1 mm of the second support portion 113 in the third direction X can be obtained by disassembling the actual battery pack 100, measuring the distance between the side wall of the side beam 112 of the box body 110 close to the accommodating cavity 115 and the side wall of the second support portion 113 away from the side beam 112 multiple times using a measuring tool, and calculating the average value. The measuring tool can be any one of, but is not limited to, a ruler, a vernier caliper, or other dimensional measuring instrument.

[0105] In one embodiment, referring to Figures 4 to 10 The side beam 112 includes: a first beam 1121, a second beam 1122, a third beam 1123, and a fourth beam 1124 that are connected to each other; the first beam 1121 and the third beam 1123 both extend along the third direction X, and the first beam 1121 and the third beam 1123 are spaced apart in the first direction Y; the second beam 1122 and the fourth beam 1124 both extend along the first direction Y, and the second beam 1122 and the fourth beam 1124 are spaced apart in the third direction X.

[0106] Multiple first support parts 114 and second support parts 113 are provided, and the second beam 1122 and the fourth beam 1124 are connected to the first support parts 114 and the second support parts 113. One first support part 114 is connected to the side of the second beam 1122 close to the accommodating cavity 115, and the other first support part 114 is connected to the side of the fourth beam 1124 close to the accommodating cavity 115, so as to ensure that the two first support parts 114 are arranged relative to each other, thereby ensuring that the two first support parts 114 can flatly support and fix the first battery assembly 130, thereby ensuring the structural stability of the first battery assembly 130, ensuring the overall structural stability of the battery pack 100, and ensuring the normal use of the battery pack 100.

[0107] A second support portion 113 is connected to the side of the second beam 1122 close to the accommodating cavity 115, and another second support portion 113 is connected to the side of the fourth beam 1124 close to the accommodating cavity 115, so as to ensure that the two second support portions 113 are arranged relative to each other, thereby ensuring that the two second support portions 113 can flatly support and fix the second battery assembly 120, thereby ensuring the structural stability of the second battery assembly 120, ensuring the overall structural stability of the battery pack 100, and ensuring the normal use of the battery pack 100.

[0108] In one embodiment, the bottom plate 111 and the side beams 112 are welded and fixed to ensure the connection strength between the bottom plate 111 and the side beams 112. At the same time, the overall sealing of the box body 110 is ensured, and thus the overall sealing performance of the battery pack 100 is ensured, so as to reduce the impact of external components on the components in the battery pack 100, extend the service life of the components in the battery pack 100, extend the service life of the battery pack 100, and ultimately improve the safety performance of the battery pack 100.

[0109] In one embodiment, in order to facilitate the assembly of the first battery assembly 130 and the second battery assembly 120 into the box, in this application, reference is made to Figures 11 to 18 The first supporting member 131 has a first hanging ring portion 1312, which is used to load the first battery assembly 130 into the accommodating cavity 115; the second supporting member 121 has a second hanging ring portion 1212, which is used to load the second battery assembly 120 into the accommodating cavity 115.

[0110] The first hanging ring portion 1312 and the first supporting member 131 can be integrally formed, that is, the first hanging ring portion 1312 and the first supporting member 131 are an integrated structure; the first hanging ring portion 1312 and the first supporting member 131 can also be separately provided and fixedly connected. For example, the first hanging ring portion 1312 is fixedly connected to the first supporting member 131 by an adhesive process. This is not specifically limited in this application and can be specifically configured according to actual circumstances.

[0111] The second hanging ring portion 1212 and the second supporting member 121 can be integrally formed, that is, the second hanging ring portion 1212 and the second supporting member 121 are an integral structure; the second hanging ring portion 1212 and the second supporting member 121 can also be provided separately and fixedly connected. For example, the second hanging ring portion 1212 is fixedly connected to the second supporting member 121 by an adhesive process. This is not specifically limited in this application and can be specifically configured according to actual circumstances.

[0112] In this application, a first hanging ring portion 1312 is provided on the first supporting member 131 so as to assemble the first battery assembly 130 into the accommodating cavity 115 using the first hanging ring portion 1312, and a second hanging ring portion 1212 is provided on the second supporting member 121 so as to assemble the second battery assembly 120 into the accommodating cavity 115 using the second hanging ring portion 1212, so as to facilitate the assembly of the first battery assembly 130 and the second battery assembly 120 into the box body 110, thereby further improving the assembly efficiency of the battery pack 100.

[0113] In one embodiment, in order to optimize the overall exhaust structure of the battery pack 100, in this application, reference is made to Figure 2 、 Figures 4 to 7 、 Figure 13 、 Figure 17A first exhaust channel 1125 and a second exhaust channel 1126 are opened in the side beam 112, and the first exhaust channel 1125 and the second exhaust channel 1126 are separated.

[0114] Specifically, a first pressure relief portion 1321 is provided on the side of the first single battery 132 facing the first supporting member 131 , and a first exhaust cavity 1313 is defined in the first supporting member 131 . The first pressure relief portion 1321 is used to connect to the first exhaust cavity 1313 , and the first exhaust cavity 1313 is connected to the first exhaust channel 1125 .

[0115] A second pressure relief portion 1221 is provided on a side of the second battery cell 122 facing the first supporting member 131 . A second exhaust cavity 1213 is defined in the first supporting member 131 . The second pressure relief portion 1221 is connected to the second exhaust cavity 1213 , and the second exhaust cavity 1213 is connected to the second exhaust channel 1126 .

[0116] The first pressure relief portion 1321 may be formed by directly opening an explosion-proof line on the shell of the first single battery 132 , or by directly installing an explosion-proof valve on the shell of the first single battery 132 . This is not specifically limited in this application and may be specifically set according to actual circumstances.

[0117] The second pressure relief portion 1221 may be formed by directly opening an explosion-proof scoreline on the shell of the second single battery 122 , or may be formed by directly installing an explosion-proof valve on the shell of the second single battery 122 . This is not specifically limited in the present application and may be specifically configured according to actual circumstances.

[0118] It can be understood that when the first single cell 132 in the battery pack 100 experiences thermal runaway, the generated high-temperature and high-pressure gas is discharged into the first exhaust cavity 1313, and then transported from the first exhaust cavity 1313 to the first exhaust channel 1125, and then discharged to the external space from the first exhaust channel 1125.

[0119] When the second battery cell 122 in the battery pack 100 experiences thermal runaway, the generated high-temperature and high-pressure gas is discharged into the second exhaust chamber 1213 , and then transported from the second exhaust chamber 1213 to the second exhaust channel 1126 , and then discharged to the outside space through the second exhaust channel 1126 .

[0120] The present application provides a first exhaust channel 1125 and a second exhaust channel 1126 in the side beam 112, and the first exhaust cavity 1313 is connected to the first exhaust channel 1125, and the second exhaust cavity 1213 is connected to the second exhaust channel 1126, so as to ensure that when thermal runaway occurs in the first single cell 132 and the second single cell 122, the high-temperature and high-pressure gas generated is discharged in a direction from the first exhaust channel 1125 and the second exhaust channel 1126, so as to improve the safety performance of the battery pack 100. At the same time, the first exhaust channel 1125 and the second exhaust channel 1126 are provided inside the side beam 112, and there is no need to set up other additional exhaust components, thereby improving the space occupancy rate of the single cells in the battery pack 100 and ultimately improving the capacity of the battery pack 100.

[0121] In one embodiment, in order to further optimize the overall exhaust structure of the battery pack 100, in this application, reference is made to Figure 2 、 Figures 4 to 7 、 Figure 13 、 Figure 17 A first exhaust port 1127 and a second exhaust port 1128 are provided on the side beam 112 , and are spaced apart from each other. The first exhaust port 1127 is connected to the first exhaust channel 1125 , and the second exhaust port 1128 is connected to the second exhaust channel 1126 .

[0122] Specifically, the battery pack 100 further includes: a plurality of explosion-proof valves 180 , which respectively cover the first exhaust port 1127 and the second exhaust port 1128 to block the first exhaust port 1127 and the second exhaust port 1128 .

[0123] It can be understood that when the battery pack 100 is in a normal working state, multiple explosion-proof valves 180 respectively block the first exhaust port 1127 and the second exhaust port 1128 to seal the first exhaust channel 1125 and the second exhaust channel 1126, thereby isolating the first exhaust channel 1125, the second exhaust channel 1126, the first exhaust cavity 1313 and the second exhaust cavity 1213 from the external space, so that the interior of the battery pack 100 is a closed space, eliminating the influence of the external environment on the components inside the battery pack 100, and ensuring the normal use of the battery pack 100.

[0124] When the first single cell 132 in the battery pack 100 experiences thermal runaway, the generated high-temperature and high-pressure gas is discharged into the first exhaust chamber 1313 and the first exhaust channel 1125; when the air pressure in the first exhaust channel 1125 reaches the pressure threshold of the explosion-proof valve 180, the explosion-proof valve 180 located at the first exhaust port 1127 is opened, and the gas in the first exhaust chamber 1313 and the first exhaust channel 1125 is discharged from the first exhaust port 1127 to the external environment to ensure the safety performance of the battery pack 100.

[0125] When thermal runaway occurs in the second single cell 122 in the battery pack 100, the generated high-temperature and high-pressure gas is discharged into the second exhaust chamber 1213 and the second exhaust channel 1126; when the air pressure in the second exhaust channel 1126 reaches the pressure threshold of the explosion-proof valve 180, the explosion-proof valve 180 located at the second exhaust port 1128 is opened, and the gas in the second exhaust chamber 1213 and the second exhaust channel 1126 is discharged from the second exhaust port 1128 to the external environment to ensure the safety performance of the battery pack 100.

[0126] In one embodiment, the first exhaust channel 1125 , the second exhaust channel 1126 , the first exhaust port 1127 , and the second exhaust port 1128 are all opened on the second beam 1122 .

[0127] On the other hand, in an embodiment of the present application, the present application also provides an electrical device, including: a battery pack 100 as described in any of the above embodiments, the battery pack 100 serves as a power supply for the electrical device to ensure normal operation of the electrical device.

[0128] Among them, electrical devices can be but are not limited to mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc.

[0129] The above steps are merely provided to help understand the method, structure, and core concept of the present application. A person skilled in the art may make several improvements and modifications to the present application without departing from the principles of the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A battery pack, characterized in that: include: A box body, the box body comprising: a bottom plate, a side beam, and a first support portion, the side beam being arranged around the edge of the bottom plate, and the bottom plate and the side beam cooperating to enclose a receiving cavity, the first support portion being protrudingly arranged and connected to a side of the side beam close to the receiving cavity, and having a fixing groove formed on the first support portion; a first battery assembly disposed in the accommodating cavity, the first battery assembly comprising: a first supporting member and a plurality of first single cells, the plurality of first single cells being disposed on a side of the first supporting member away from the bottom plate, and the first supporting member being connected to the first supporting portion; a first locking member disposed in the fixing groove and fixedly connected to the first supporting portion; and The second locking member is passed through the first supporting member and is fixedly connected to the first locking member to lock and fix the first supporting member.

2. The battery pack according to claim 1, wherein: A first fixing hole is formed on the first supporting member, and a second fixing hole is formed on the first locking member; The second locking member is passed through the first fixing hole and the second fixing hole to lock and fix the first supporting member.

3. The battery pack according to claim 2, wherein: The battery pack has a first direction and a second direction intersecting each other; A limiting wall is provided on a side of the first supporting portion close to the first supporting member, and the limiting wall is located in a circumferential area of ​​the fixing groove; The first locking member includes: two first side walls arranged opposite to each other in the first direction, and a second side wall and a third side wall arranged opposite to each other in the second direction, the second side wall being arranged opposite to the third side wall and close to the limiting wall, the first side wall, the second side wall and the third side wall together forming a locking cavity, the second fixing hole being formed in the second side wall and communicating with the locking cavity; The second locking member is passed through the first fixing hole and the second fixing hole to locate part of the second locking member in the locking cavity; and the second locking member is connected to the second side wall to abut the second side wall against the limiting wall to lock and fix the first supporting member.

4. The battery pack according to claim 3, wherein: The first supporting portion includes: a first sub-supporting portion, the first sub-supporting portion extending along the first direction, and the first sub-supporting portion is protruding and connected to a side of the side beam close to the accommodating cavity; and The second sub-support portion is connected to a side of the first sub-support portion close to the accommodating cavity, the fixing groove is provided in the second sub-support portion, and the first supporting member is connected to the second sub-support portion.

5. The battery pack according to claim 4, wherein: There are multiple second sub-support parts, each of which is connected to a side of the first sub-support part close to the accommodating cavity, and the multiple second sub-support parts are spaced apart in the first direction, and each of the second sub-support parts is provided with the fixing groove; There are a plurality of the first locking members and the second locking members, each of the first locking members is respectively disposed in a corresponding one of the fixing grooves, and a plurality of first fixing holes are formed on the first supporting member; Each second locking member is inserted into a corresponding first fixing hole and a corresponding second fixing hole, and each second locking member is riveted to a corresponding first locking member to lock and fix the first supporting member.

6. The battery pack according to claim 1, wherein: The box body further includes: a second support portion, the second support portion is protruding and connected to a side of the side beam close to the accommodating cavity, and the second support portion is arranged close to the bottom plate relative to the first support portion; The battery pack also includes: a second battery assembly, which is arranged in the accommodating cavity. The second battery assembly includes: a second supporting member and a plurality of second single batteries. The plurality of second single batteries are arranged on a side of the second supporting member away from the bottom plate, and the second supporting member is connected to the second supporting portion.

7. The battery pack according to claim 6, wherein: A third fixing hole is formed on the second supporting portion; The battery pack further includes: a third locking member, which is disposed on the second supporting member and passes through the third fixing hole. The third locking member is fixedly connected to the second supporting portion to lock and fix the second supporting member.

8. The battery pack according to claim 6, wherein: A first exhaust channel and a second exhaust channel are provided in the side beam, and the first exhaust channel and the second exhaust channel are separated; A first pressure relief portion is provided on a side of the first single battery cell facing the first supporting member. A first exhaust cavity is defined in the first supporting member. The first pressure relief portion is used to communicate with the first exhaust cavity, and the first exhaust cavity is communicated with the first exhaust channel. A second pressure relief portion is provided on a side of the second single battery cell facing the second supporting member. A second exhaust cavity is defined in the second supporting member. The second pressure relief portion is used to communicate with the second exhaust cavity, and the second exhaust cavity is communicated with the second exhaust channel.

9. The battery pack according to claim 8, wherein: The side beam is provided with a first exhaust port and a second exhaust port spaced apart from each other, the first exhaust port is communicated with the first exhaust channel, and the second exhaust port is communicated with the second exhaust channel; The battery pack further includes: a plurality of explosion-proof valves, wherein the plurality of explosion-proof valves are respectively sealed on the first exhaust port and the second exhaust port.

10. An electrical device, characterized in that: The battery pack comprises the battery pack according to any one of claims 1 to 9, wherein the battery pack serves as a power supply for the electrical device.

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