Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a box body, a battery cell module and an electrical assembly, a containing cavity is formed in the box body, the battery cell module comprises a plurality of battery cells, the battery cells are all arranged in the containing cavity, the electrical assembly is connected with the battery cell module, and at least part of the electrical assembly is located outside the containing cavity. According to the battery pack, the volume of the box body can be reduced, and the weight of the box body is also reduced after the volume of the box body is reduced, so that the weight of the battery pack can be reduced, and the cost of the battery pack is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an electric device. BACKGROUND

[0002] The battery pack mainly comprises a box body, and heat transfer components such as an electric core module, electrical components and liquid cooling pipes are arranged in the box body.

[0003] In the related art, the volume of the box body is large, which leads to a large weight of the battery pack. UTILITY MODEL CONTENT

[0004] Embodiments of the present application provide a battery pack and an electric device, which can solve the technical problem that the volume of the box body is large, which leads to a large weight of the battery pack.

[0005] In a first aspect, embodiments of the present application provide a battery pack, comprising:

[0006] a box body, which forms an accommodating cavity;

[0007] an electric core module, which comprises a plurality of electric cores, and the plurality of electric cores are arranged in the accommodating cavity;

[0008] electrical components, which are connected with the electric core module, and at least part of the electrical components are located outside the accommodating cavity.

[0009] In an embodiment, at least part of the electrical components are arranged on the outer wall surface of the box body; and / or, the battery pack further comprises a first cover plate, which is connected to the outer wall surface of the box body, a first space is formed between the first cover plate and the outer wall surface of the box body, and at least part of the electrical components are located in the first space.

[0010] In an embodiment, the battery pack further comprises a connecting row, one end of the connecting row is located in the accommodating cavity and is electrically connected with the electric core module, and the other end of the connecting row extends out of the accommodating cavity and is connected with the electrical components.

[0011] In an embodiment, the box body forms a first connecting hole which communicates with the accommodating cavity, the first connecting hole is opposite to the output pole of the electric core module, and the other end of the connecting row is arranged in the first connecting hole to be located outside the accommodating cavity.

[0012] In an embodiment, the connecting row comprises a first connecting block, a second connecting block and a bending block, the extension directions of the first connecting block and the second connecting block are different, and the bending block connects the first connecting block and the second connecting block.

[0013] In an embodiment, the electrical assembly comprises a high-voltage connector, the high-voltage connector is arranged on the outer wall of the box, and the other end of the connection row is electrically connected with the high-voltage connector.

[0014] In an embodiment, the electrical assembly comprises a high-voltage connector, the high-voltage connector is arranged on the outer wall of the box, and the other end of the connection row is electrically connected with the high-voltage connector.

[0015] In an embodiment, the electrical assembly comprises a BMS module, the BMS module is arranged on the outer wall of the box, and the battery cell module is electrically connected with the BMS module.

[0016] In an embodiment, the box is formed with a second connecting hole in communication with the accommodating cavity, the electrical assembly comprises a connection wire harness, one end of the connection wire harness is electrically connected with the battery cell module, the other end of the connection wire harness is arranged through the second connecting hole and is electrically connected with the BMS module, and at least part of the connection wire harness is located outside the accommodating cavity.

[0017] In an embodiment, the electrical assembly comprises an MSD module, the MSD module is arranged on the outer wall of the box; and / or,

[0018] The electrical assembly comprises a PDU module, the PDU module is arranged on the outer wall of the box.

[0019] In a second aspect, embodiments of the present application provide a power utilization device comprising the battery pack described above.

[0020] The embodiments of the present application have the following beneficial effects:

[0021] In the embodiments of the present application, the battery cell module is installed in the accommodating cavity of the box, and at least part of the electrical assembly is arranged outside the accommodating cavity, so that at least part of the electrical assembly does not occupy the space of the accommodating cavity, the size of the accommodating cavity can be reduced, and then the volume of the box can be reduced. After the volume of the box is reduced, the weight is also reduced, and then the weight of the battery pack can be reduced, and the cost of the battery pack is reduced.

[0022] At the same time, the electrical assembly is arranged outside the accommodating cavity, when the electrical assembly of the battery pack needs to be repaired and replaced, the box does not need to be opened, and the maintenance of the battery pack is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0024] Figure 1 is a structural schematic diagram of a battery pack provided by an embodiment of the present application;

[0025] Figure 2 is one of structural exploded schematic diagrams of a battery pack provided by an embodiment of the present application;

[0026] Figure 3 is a structural schematic diagram of a battery pack provided by an embodiment of the present application; Figure 2 is an enlarged structural schematic diagram of A in FIG. 5;

[0027] Figure 4 is another structural exploded schematic diagram of a battery pack provided by an embodiment of the present application;

[0028] Figure 5 is a side view of a battery pack provided by an embodiment of the present application;

[0029] Figure 6 is a structural schematic diagram of a battery cell module provided by an embodiment of the present application;

[0030] Figure 7 is a structural schematic diagram of a battery cell module provided by an embodiment of the present application;

[0031] Figure 8 is a side view of a battery cell module provided by an embodiment of the present application;

[0032] Figure 9 is a structural schematic diagram of a battery pack provided by an embodiment of the present application;

[0033] Figure 10 is a sectional view of a battery pack provided by an embodiment of the present application;

[0034] Figure 11 is one of structural schematic diagrams of a bottom plate provided by an embodiment of the present application;

[0035] Figure 12 is another structural schematic diagram of a bottom plate provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device.

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device. Figures 1 to 12 The battery pack and the electrical equipment of the present application are described below.

[0038] According to the embodiments of the first aspect of the present application, the battery pack includes a box body 4, a battery cell module 6, and an electrical assembly 7. The box body 4 forms an accommodation cavity 41. The battery cell module 6 includes a plurality of battery cells, and the plurality of battery cells are arranged in the accommodation cavity 41. The electrical assembly 7 is connected with the battery cell module 6, and at least part of the electrical assembly 7 is located outside the accommodation cavity 41. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The battery pack according to the embodiments of the present application installs the battery cell module 6 in the accommodation cavity 41 of the box body 4, and sets at least part of the electrical assembly 7 outside the accommodation cavity 41, so that at least part of the electrical assembly 7 does not occupy the space of the accommodation cavity 41, the size of the accommodation cavity 41 can be reduced, and then the volume of the box body 4 can be reduced. After the volume of the box body 4 is reduced, the weight is also reduced, and then the weight of the battery pack can be reduced, and the cost of the battery pack is reduced.

[0039] The battery pack according to the embodiments of the present application installs the battery cell module 6 in the accommodation cavity 41 of the box body 4, and sets at least part of the electrical assembly 7 outside the accommodation cavity 41, so that at least part of the electrical assembly 7 does not occupy the space of the accommodation cavity 41, the size of the accommodation cavity 41 can be reduced, and then the volume of the box body 4 can be reduced. After the volume of the box body 4 is reduced, the weight is also reduced, and then the weight of the battery pack can be reduced, and the cost of the battery pack is reduced.

[0040] At the same time, the electrical assembly 7 is arranged outside the accommodation cavity 41, when the electrical assembly 7 of the battery pack needs to be repaired and replaced, the box body 4 does not need to be opened, and the maintenance of the battery pack is facilitated.

[0041] In some examples, the electrical assembly 7 located outside the accommodation cavity 41 can mean that the electrical assembly 7 is located at the outer wall surface of the box body 4, or can mean that the electrical assembly 7 is arranged separately from the box body 4.

[0042] In some embodiments, at least part of the electrical assembly 7 is arranged at the outer wall surface of the box body 4.

[0043] It can be understood that the at least partial electrical components 7 are arranged at the outer wall surface of the box body 4, so that the at least partial electrical components 7 do not occupy the space of the accommodation cavity 41, and thus do not affect the volume of the box body 4, thereby reducing the volume of the box body 4. When the electrical components 7 need to be maintained, the box body 4 does not need to be opened, thereby reducing the maintenance complexity of the battery pack.

[0044] In some examples, the electrical components 7 arranged at the outer wall surface of the box body 4 can mean that the electrical components 7 are connected to the outer wall surface of the box body 4, and can also mean that the electrical components 7 are connected to other structures and arranged at the outer wall surface of the box body 4.

[0045] In some embodiments, as Figure 2 and Figure 3 , the battery pack further comprises a first cover plate 8 connected to the outer wall surface of the box body 4, and a first space 81 is formed between the first cover plate 8 and the outer wall surface of the box body 4, and the at least partial electrical components 7 are arranged in the first space 81.

[0046] It can be understood that the first cover plate 8 can cover the at least partial electrical components 7 by cooperating with the outer wall surface of the box body 4, so as to protect the at least partial electrical components 7.

[0047] In some examples, the electrical components 7 arranged outside the accommodation cavity 41 can be all arranged in the first space 81, or can be partially arranged in the first space 81.

[0048] In some examples, the first cover plate 8 is sealingly connected to the outer wall surface of the box body 4, so as to reduce the influence of the external environment on the components in the first space 81.

[0049] In some examples, the first cover plate 8 is detachably connected to the outer wall surface of the box body 4, so as to facilitate the maintenance and replacement of the components in the first space 81.

[0050] In some embodiments, as Figure 2 and Figure 3 , the battery pack further comprises a connection row 71, one end of the connection row 71 is arranged in the accommodation cavity 41 and electrically connected to the battery cell module 6, and the other end of the connection row 71 extends out of the accommodation cavity 41 and is connected to the electrical components 7.

[0051] It can be understood that one end of the connection row 71 extends into the accommodation cavity 41 and is electrically connected to the battery cell module 6, and the other end of the connection row 71 is arranged outside the accommodation cavity 41, so that the connection row 71 can electrically connect the battery cell module and the electrical components 7 together, and the electrical components 7 can be arranged outside the accommodation cavity 41, and meanwhile, the other end of the connection row 71 does not occupy the space of the accommodation cavity 41, which is conducive to reducing the volume of the box body 4. When the connection row 71 needs to be maintained, the box body 4 does not need to be opened, thereby reducing the maintenance complexity of the battery pack.

[0052] In some examples, the other end of the connecting strip 71 is electrically connected with the MSD module 73 or the high-voltage connector 72, for example.

[0053] In some examples, the connecting strip 71 includes a plurality of copper strips. The number of copper strips can be adjusted adaptively according to the number of battery cell modules of the battery cell module 6.

[0054] In some embodiments, as Figure 2 and Figure 3 The box 4 is formed with a first connecting hole 44 in communication with the accommodating cavity 41, the first connecting hole 44 is opposite to the output pole of the battery cell module 6, and the other end of the connecting strip 71 is arranged in the first connecting hole 44 to be located outside the accommodating cavity 41.

[0055] It can be understood that by forming the first connecting hole 44 in the box 4, the connecting strip 71 can connect the battery cell module 6 and the components outside the accommodating cavity 41 through the first connecting hole 44, so that at least the other end of the connecting strip 71 can be located outside the accommodating cavity 41, thereby facilitating the reduction of the volume of the box 4.

[0056] It can be understood that the first connecting hole 44 and the output pole of the battery cell module 6 are arranged opposite to each other, so that after one end of the connecting strip 71 is connected with the battery cell module 6, the other end of the connecting strip 71 can directly pass out of the accommodating cavity 41 through the first connecting hole 44, facilitating the arrangement of the connecting strip 71.

[0057] In some embodiments, as Figure 2 and Figure 3 The connecting strip 71 includes a first connecting block 711, a second connecting block 712, and a bending block 713, the extension directions of the first connecting block 711 and the second connecting block 712 are different, and the bending block 713 connects the first connecting block 711 and the second connecting block 712.

[0058] It can be understood that the first connecting block 711 and the second connecting block 712 are connected by the bending block 713, which facilitates the connection of the first connecting block 711 and the second connecting block 712.

[0059] It can be understood that one end of the bending block 713 extends to the first connecting block 711, facilitating the connection of the bending block 713 and the first connecting block 711, and the other end of the bending block 713 extends to the second connecting block 712, facilitating the connection of the bending block 713 and the second connecting block 712.

[0060] In some embodiments, as Figure 2 and Figure 3 The electrical assembly 7 includes a high-voltage connector 72, the high-voltage connector 72 is arranged on the outer wall surface of the box 4, and the other end of the connecting strip 71 is electrically connected with the high-voltage connector 72.

[0061] It can be understood that the high-voltage connector 72 and the other end of the connection row 71 are both arranged at the outer wall surface of the box body 4, thereby facilitating the connection of the other end of the connection row 71 and the high-voltage connector 72, so that the high-voltage connector 72 can be electrically connected with the battery cell module 6 through the connection row 71. At the same time, the high-voltage connector 72 is arranged at the outer wall surface of the box body 4, that is, the high-voltage connector 72 is located outside the accommodation cavity 41, and the high-voltage connector 72 does not affect the volume of the box body 4, which is beneficial to the miniaturization of the volume of the box body 4. Moreover, the high-voltage connector 72 is arranged at the outer wall surface of the box body 4, so when the high-voltage connector 72 needs to be repaired or replaced, the box body 4 does not need to be opened, thereby reducing the complexity of the repair of the battery pack.

[0062] In some embodiments, the electrical assembly 7 includes a high-voltage plug-in connector, the high-voltage plug-in connector is arranged at the outer wall surface of the box body 4, and the other end of the connection row 71 is electrically connected with the high-voltage connector 72 through the high-voltage plug-in connector.

[0063] It can be understood that the high-voltage connector 72 and the other end of the connection row 71 are both arranged at the outer wall surface of the box body 4, thereby facilitating the connection of the other end of the connection row 71 and the high-voltage connector 72, so that the high-voltage connector 72 can be electrically connected with the battery cell module 6 through the connection row 71. At the same time, the high-voltage connector 72 is arranged at the outer wall surface of the box body 4, that is, the high-voltage connector 72 is located outside the accommodation cavity 41, and the high-voltage connector 72 does not affect the volume of the box body 4, which is beneficial to the miniaturization of the volume of the box body 4. Moreover, the high-voltage connector 72 is arranged at the outer wall surface of the box body 4, so when the high-voltage connector 72 needs to be repaired or replaced, the box body 4 does not need to be opened, thereby reducing the complexity of the repair of the battery pack.

[0064] The high-voltage plug-in connector, the other end of the connection row 71 and the high-voltage connector 72 are all located at the outer wall surface of the box body 4, thereby facilitating the connection of the high-voltage plug-in connector, the other end of the connection row 71 and the high-voltage connector 72.

[0065] The high-voltage plug-in connector is located outside the accommodation cavity 41, that is, the high-voltage plug-in connector is located outside the accommodation cavity 41, and the high-voltage plug-in connector does not affect the volume of the box body 4, which is beneficial to the miniaturization of the volume of the box body 4.

[0066] The high-voltage plug-in connector is arranged at the outer wall surface of the box body 4, so when the high-voltage plug-in connector needs to be repaired or replaced, the box body 4 does not need to be opened, thereby reducing the complexity of the repair of the battery pack.

[0067] In some embodiments, as Figure 2 and Figure 3 The electrical assembly 7 includes an MSD module 73, and the MSD module 73 is arranged at the outer wall surface of the box body 4.

[0068] It can be understood that the MSD module 73 is arranged at the outer wall surface of the box body 4, that is, the MSD module 73 is located outside the accommodation cavity 41, and the MSD module 73 does not occupy the space of the accommodation cavity 41, thereby being beneficial to the miniaturization of the volume of the box body 4. Moreover, the MSD module 73 is arranged outside the box body 4, so when the MSD module 73 needs to be repaired or replaced, the box body 4 does not need to be opened, thereby reducing the complexity of the repair of the battery pack.

[0069] In some examples, the other end of the connecting row 71 is electrically connected with the MSD module 73, so that the MSD module 73 is connected between two battery cell modules of the battery cell module group 6.

[0070] In some embodiments, as shown in Figure 1 and Figure 5 The electrical assembly 7 comprises a PDU module 74, which is arranged on the outer wall surface of the box 4.

[0071] It can be understood that, by arranging the PDU module 74 on the outer wall surface of the box 4, i.e., the PDU module 74 is located outside the accommodation cavity 41, the PDU module 74 does not occupy the space of the accommodation cavity 41, thereby facilitating the miniaturization of the volume of the box 4. Moreover, by arranging the PDU module 74 outside the box 4, when the PDU module 74 needs to be repaired or replaced, the box 4 does not need to be opened, thereby reducing the complexity of the repair of the battery pack.

[0072] In some embodiments, as shown in Figure 5 The electrical assembly 7 comprises a BMS module 75, which is arranged on the outer wall surface of the box 4, and the battery cell module group 6 is electrically connected with the BMS module 75.

[0073] It can be understood that, by arranging the BMS module 75 on the outer wall surface of the box 4, i.e., the BMS module 75 is located outside the accommodation cavity 41, the BMS module 75 does not occupy the space of the accommodation cavity 41, thereby facilitating the miniaturization of the volume of the box 4. Moreover, by arranging the BMS module 75 outside the box 4, when the BMS module 75 needs to be repaired or replaced, the box 4 does not need to be opened, thereby reducing the complexity of the repair of the battery pack.

[0074] In some embodiments, as shown in Figure 5 The box 4 is formed with a second connecting hole 45 which is in communication with the accommodation cavity 41, and the electrical assembly 7 comprises a connecting wire harness, one end of the connecting wire harness is electrically connected with the battery cell module group 6, the other end of the connecting wire harness is arranged through the second connecting hole 45 and is electrically connected with the BMS module 75, and at least part of the connecting wire harness is located outside the accommodation cavity 41.

[0075] It can be understood that, by forming the second connecting hole 45 in the box 4, the connecting wire harness can pass through the second connecting hole 45 to connect the battery cell module group 6 and the BMS module 75.

[0076] The other end of the connecting wire harness and the BMS module 75 are both located at the outer wall surface of the box 4, thereby facilitating the connection between the other end of the connecting wire harness and the BMS module 75, so that the BMS module 75 can be connected with the battery cell module group 6 through the connecting wire harness.

[0077] At least part of the connecting wire harness is located outside the accommodation cavity 41, so that at least part of the connecting wire harness does not affect the volume of the box 4, thereby facilitating the miniaturization of the volume of the box 4.

[0078] At least part of the connection harness is located outside the accommodating cavity 41, when the connection harness needs to be repaired or replaced, the box body 4 does not need to be opened, and the complexity of the battery pack repair is reduced.

[0079] In some embodiments, as Figure 2 and Figure 3 The battery pack further comprises a heat transfer assembly 9 connected with the battery cell module 6, the heat transfer assembly 9 is used for heat exchange with the battery cell module 6, and at least part of the heat transfer assembly 9 is located outside the accommodating cavity 41.

[0080] It can be understood that installing the battery cell module 6 in the accommodating cavity 41 of the box body 4 and arranging at least part of the heat transfer assembly 9 outside the accommodating cavity 41 can reduce the size of the accommodating cavity 41, and thus the volume of the box body 4 can be reduced. After the volume of the box body 4 is reduced, the weight is also reduced, and thus the weight of the battery pack can be reduced, and the cost of the battery pack is reduced.

[0081] At the same time, arranging the heat transfer assembly 9 outside the accommodating cavity 41 can facilitate the maintenance of the battery pack when the heat transfer assembly 9 of the battery pack needs to be repaired and replaced without opening the box body 4.

[0082] In some examples, the heat transfer assembly 9 located outside the accommodating cavity 41 can be located at the outer wall surface of the box body 4, or can be spaced apart from the box body 4.

[0083] In some embodiments, at least part of the heat transfer assembly 9 is arranged at the outer wall surface of the box body 4.

[0084] It can be understood that arranging at least part of the heat transfer assembly 9 at the outer wall surface of the box body 4 can prevent the heat transfer assembly 9 from occupying the space of the accommodating cavity 41, and thus the volume of the box body 4 is not affected, and the volume of the box body 4 can be reduced. When the heat transfer assembly 9 needs to be repaired, the box body 4 does not need to be opened, and the complexity of the battery pack repair is reduced.

[0085] In some examples, the heat transfer assembly 9 arranged at the outer wall surface of the box body 4 can be connected to the outer wall surface of the box body 4, or can be connected to other structures and located at the outer wall surface of the box body 4.

[0086] In some embodiments, at least part of the electrical assembly 7 and at least part of the heat transfer assembly 9 are arranged at the same outer wall surface of the box body 4.

[0087] It can be understood that arranging at least part of the electrical assembly 7 and at least part of the heat transfer assembly 9 at the same position can make the battery pack more compact.

[0088] In some embodiments, the at least part of the electrical components 7 and the at least part of the heat transfer components 9 are respectively arranged at different outer wall surfaces of the box 4.

[0089] It can be understood that arranging the at least part of the electrical components 7 and the at least part of the heat transfer components 9 at different sides of the box 4 improves the structural uniformity of the battery pack.

[0090] For example, the at least part of the electrical components 7 and the at least part of the heat transfer components 9 are respectively arranged at two opposite side wall surfaces of the box 4, which improves the structural uniformity of the battery pack.

[0091] For example, the cell module 6 includes a cell module including a plurality of cells arranged in sequence, and along the arrangement direction of the cells of the cell module, the heat transfer components 9 and part of the electrical components 7 are arranged at two sides of the box 4, and the other part of the electrical components 7 and the heat transfer components 9 are arranged at the same side of the box 4, so that the electrical components 7 and the heat transfer components 9 can be directly connected to the cell module, which improves the connection convenience of the electrical components 7 and the cell module and improves the connection convenience of the heat transfer components 9 and the cell module.

[0092] In some embodiments, as Figure 2 and Figure 3 The battery pack further includes a second cover plate 10 connected to the outer wall surface of the box 4, and a second space 101 is formed between the second cover plate 10 and the outer wall surface of the box 4, and the at least part of the heat transfer components 9 and / or the at least part of the electrical components 7 are arranged in the second space 101.

[0093] It can be understood that through the cooperation of the second cover plate 10 and the outer wall surface of the box 4, the second cover plate 10 can cover the at least part of the heat transfer components 9 and / or the at least part of the electrical components 7, so as to protect the at least part of the heat transfer components 9 and / or the at least part of the electrical components 7.

[0094] In some examples, the heat transfer components 9 and / or the electrical components 7 located outside the accommodating cavity 41 can be all located in the second space 101, or can be partially located in the second space 101.

[0095] In some examples, the second cover plate 10 is sealingly connected to the outer wall surface of the box 4 to reduce the influence of the external environment on the components in the second space 101.

[0096] In some examples, the second cover plate 10 is detachably connected to the outer wall surface of the box 4, which facilitates the maintenance and replacement of the components in the first space 81.

[0097] In some embodiments, as Figure 2 and Figure 3 In some embodiments, asThe heat transfer assembly 9 includes a liquid cooling pipe 91 that is in communication with the refrigeration flow channel of the battery cell module 6, and at least part of the liquid cooling pipe 91 is located outside the accommodation cavity 41.

[0098] It can be understood that the liquid cooling pipe 91 can transport the liquid cooling medium into the refrigeration flow channel of the battery cell module 6 to cool the battery cell module 6.

[0099] The at least part of the liquid cooling pipe 91 is arranged outside the accommodation cavity 41, so that the at least part of the liquid cooling pipe 91 does not occupy the space of the accommodation cavity 41, which is beneficial to the miniaturization of the structure of the box 4.

[0100] The at least part of the liquid cooling pipe 91 is arranged at the outer wall surface of the box 4, so that when the liquid cooling pipe 91 needs to be repaired or replaced, the box 4 does not need to be opened, and the complexity of the repair of the battery pack is reduced.

[0101] It should be noted that the present embodiment is only an example of the heat transfer assembly 9, and the heat transfer assembly 9 can also be a heat conduction sheet or any other suitable structure, which is not specially limited here.

[0102] In some embodiments, the box 4 is formed with a third connecting hole in communication with the accommodation cavity 41, one end of the liquid cooling pipe 91 is connected with the battery cell module 6, and the other end of the liquid cooling pipe 91 is arranged in the third connecting hole to be located outside the accommodation cavity 41.

[0103] It can be understood that by forming the third connecting hole in the box 4, the liquid cooling pipe 91 can be arranged in the third connecting hole to be in communication with the refrigeration flow channel, so as to facilitate the connection of the liquid cooling pipe 91 and the refrigeration flow channel.

[0104] In some embodiments, as Figure 2 The box 4 includes a body 46 and a top cover 47, the top cover 47 is connected to the body 46, the top cover 47 and the body 46 are arranged to form the accommodation cavity 41, and the connection between the top cover 47 and the body 46 is provided with a sealing member 48.

[0105] It can be understood that the sealing member 48 can improve the connection sealing property of the top cover 47 and the body 46, so as to reduce the influence of the external environment on the battery cell module and other components in the accommodation cavity 41.

[0106] In some examples, the sealing member 48 is, for example, sealing foam or sealing glue.

[0107] In some embodiments, as Figure 6 and Figure 7The battery cell module comprises at least two battery cell assemblies 1 stacked in sequence, each battery cell assembly 1 comprises a shell 11 and a battery cell 12, the shell 11 is formed with a mounting cavity 111, the battery cell 12 is mounted in the mounting cavity 111, and the bottom plate 112 of the shell 11 is a cold plate. The bottom plate 112 of the shell 11 of at least part of the battery cell assembly 1 abuts against the top plate of the shell 11 of the adjacent battery cell assembly 1.

[0108] According to the battery cell module, at least two battery cell assemblies 1 are stacked in sequence to form the battery cell module, and the bottom plate 112 of the shell 11 of at least part of the battery cell assembly 1 abuts against the top plate of the shell 11 of the adjacent battery cell assembly 1. Thus, the bottom plate 112 of the shell 11 of at least part of the battery cell assembly 1 can cool and dissipate heat for the battery cell 12. The cold plate is part of the structure of the shell 11, which simplifies the structure of the battery cell assembly 1. Meanwhile, the bottom plate 112 can also cool and dissipate heat for the top of the adjacent battery cell assembly 1, i.e., for the top of the battery cell 12 of the adjacent battery cell assembly 1. Thus, the bottom plate 112 of the shell 11 of the battery cell assembly 1 is reused, and the bottom plate 112 can cool and dissipate heat for the bottom of the current battery cell assembly 1 and the top of the adjacent battery cell assembly 1 at the same time. Thus, the structure of the battery cell module is simplified, and the bottom and the top of the battery cell 12 of at least part of the battery cell assembly 1 are cooled and dissipated at the same time. The cooling effect of the battery cell 12 is improved, the temperature consistency of the battery cell 12 is improved, the temperature difference between different ends of the battery cell 12 is reduced, and the cycle life of the battery cell 12 is improved.

[0109] For example, the battery cell module comprises a first battery cell module, a second battery cell module and a third battery cell module stacked in sequence. The top of the first battery cell module abuts against the bottom of the second battery cell module, and the top of the second battery cell module abuts against the bottom of the third battery cell module. The bottom plate 112 of the shell 11 of the second battery cell module can cool and dissipate heat for the top of the first battery cell module and the bottom of the second battery cell module at the same time, and the bottom plate 112 of the shell 11 of the third battery cell module can cool and dissipate heat for the bottom of the third battery cell module and the top of the second battery cell module at the same time. That is, the bottom and the top of at least the first battery cell module and the second battery cell module can be cooled and dissipated at the same time.

[0110] In some examples, the battery cell assembly 1 comprises a plurality of battery cells 12 stacked together, and the shell 11 of the battery cell assembly 1 is provided with end plates on both sides. The end plates can pre-tighten the plurality of battery cells 12.

[0111] In some embodiments, as Figure 6 A heat-conducting layer 13 is arranged between the two adjacent battery cell assemblies 1.

[0112] It can be understood that by arranging the heat-conducting layer 13 between the two adjacent battery cell assemblies 1, the heat transfer effect between the two adjacent battery cell assemblies 1 can be improved, so that the bottom plate 112 of the shell 11 of one of the battery cell assemblies 1 can effectively cool and dissipate heat from the top of the adjacent battery cell assembly 1.

[0113] For example, the heat-conducting layer 13 is a heat-conducting structural adhesive or a heat-conducting gasket.

[0114] In some embodiments, the two adjacent battery cell assemblies 1 are detachably connected, facilitating the maintenance and replacement of the battery cell assemblies 1.

[0115] In some embodiments, the battery cell module further comprises a connecting assembly 2 connected to the side wall surfaces of the two adjacent battery cell assemblies 1.

[0116] It can be understood that the connecting assembly 2 is used to connect the two adjacent battery cell assemblies 1 together, so that the two adjacent battery cell assemblies 1 are kept connected, so that the top and bottom of the two adjacent battery cell assemblies 1 abut, and thus the bottom plate 112 of the shell 11 of one of the battery cell assemblies 1 can cool and dissipate heat from the top of the adjacent battery cell assembly 1. At the same time, the connecting assembly 2 is connected to the side wall surfaces of the battery cell assemblies 1, so that the connecting assembly 2 does not affect the stacking of the two adjacent battery cell assemblies 1, i.e. there is no gap between the two adjacent battery cell assemblies 1, so that the bottom plate 112 of the shell 11 of the current battery cell assembly 1 can cool and dissipate heat from the top of the adjacent battery cell assembly 1.

[0117] In some examples, as Figure 8 the connecting assembly 2 comprises a connecting sheet 21, one end of the connecting sheet 21 is connected to the side wall surface of one of the two adjacent battery cell assemblies 1, and the other end of the connecting sheet 21 is connected to the side wall surface of the other of the two adjacent battery cell assemblies 1, so as to achieve the connection of the two adjacent battery cell assemblies 1.

[0118] Specifically, the connecting sheet 21 is provided with connecting holes at both ends, a fastener is arranged in the connecting hole at one end of the connecting sheet 21 and connected to the side wall surface of one of the two adjacent battery cell assemblies 1, so as to achieve the connection of one end of the connecting sheet 21 to the side wall surface of one of the two adjacent battery cell assemblies 1, and the connection of the other end of the connecting sheet 21 to the side wall surface of the other of the two adjacent battery cell assemblies 1 is the same.

[0119] In some embodiments, as Figure 8 the battery cell module further comprises a reinforcing member 3, and the side wall surface of each battery cell assembly 1 is connected to the reinforcing member 3.

[0120] It can be understood that the reinforcing member 3 is used to fixedly connect different battery cell assemblies 1 together, so as to position the at least two battery cell assemblies 1 stacked in sequence, facilitating the subsequent installation and movement of the battery cell module.

[0121] Specifically, as shown in Figure 8 The reinforcing member 3 comprises a horizontal plate 31 and at least two vertical plates 32, the at least two vertical plates 32 comprising a first vertical plate 32 and a second vertical plate 32, the first vertical plate 32 and the second vertical plate 32 being arranged side by side, the side wall surface of each battery cell assembly 1 being connected with the first vertical plate 32, the side wall surface of each battery cell assembly 1 being connected with the second vertical plate 32, and the horizontal plate 31 connecting the first vertical plate 32 and the second vertical plate 32.

[0122] It can be understood that the at least two battery cell assemblies 1 arranged in sequence are fixedly connected together through the first vertical plate 32, and the at least two battery cell assemblies 1 arranged in sequence are fixedly connected together through the second vertical plate 32, thereby improving the fixed connection effect between different battery cell assemblies 1.

[0123] The first vertical plate 32 and the second vertical plate 32 are connected through the horizontal plate 31, so that the fixed connection effect of different battery cell assemblies 1 can be improved.

[0124] In some embodiments, as shown in Figure 9 and Figure 10 The battery pack comprises at least three fixed connecting members 5, the fixed connecting members 5 connecting the battery cell module and the box body 4, and the at least three fixed connecting members 5 being arranged in sequence along the height direction of the box body 4.

[0125] It can be understood that the different fixed connecting members 5 are at different heights, that is, the battery cell module and the same at least three fixed positions are at different heights, which can effectively disperse the load and reduce the force arm, so that the battery pack is more resistant to impact and vibration.

[0126] In some embodiments, as shown in Figure 9 and Figure 10 The at least three fixed connecting members 5 comprise a first fixed support 51, one end of the box body 4 is formed with a mounting opening in communication with the accommodating cavity 41, and the end surface of the one end of the box body 4 is formed with a mounting groove 42, the first fixed support 51 being arranged in the mounting groove 42, and the first fixed support 51 connecting the battery cell module and the box body 4.

[0127] It can be understood that the first fixed support 51 can fixedly connect the battery cell module and the box body 4 together. Meanwhile, the mounting groove 42 for mounting the first fixed support 51 is arranged at the end surface of the one end of the box body 4, and when the first fixed support 51 is arranged in the mounting groove 42, the first fixed support 51 can be operated through the slot of the mounting groove 42, so that the first fixed support 51 and the battery cell module can be fixedly connected together, and the first fixed support 51 and the box body 4 can be fixedly connected together.

[0128] For example, along the height direction of the box 4, the depth of the mounting groove 42 is greater than the height of the first fixing support 51, so that the first fixing support 51 does not protrude from the box 4 after being mounted in the mounting groove 42, so that the first fixing support 51 does not affect the height of the box 4.

[0129] In some embodiments, as Figure 9 and Figure 10 At least three fixed connecting pieces 5 include a second fixing support 52, the side wall of the box 4 is formed with a mounting hole 43, the second fixing support 52 is arranged in the mounting hole 43, and the second fixing support 52 connects the battery cell module and the box 4.

[0130] It can be understood that the second fixing support 52 can fixedly connect the battery cell module and the box 4 together. At the same time, the mounting hole 43 for accommodating the second fixing support 52 is formed at the side wall of the box 4, and when the second fixing support 52 is arranged in the mounting hole 43, the second fixing support 52 can be operated through the mounting hole 43, thereby facilitating the fixed connection of the second fixing support 52 and the battery cell module, and facilitating the fixed connection of the second fixing support 52 and the box 4.

[0131] In some embodiments, the middle part of the inner side wall of the box 4 is connected with the side wall surface of the battery cell module through a connecting block.

[0132] In some embodiments, as Figure 11 and Figure 12 At least two battery cell assemblies 1 arranged in sequence include a first battery cell module and a second battery cell module, the bottom plate 112 of the shell 11 of the first battery cell module includes a heat conduction piece 123 and oppositely arranged first and second refrigeration surfaces 124 and 125, the heat conduction piece 123 connects the first and second refrigeration surfaces 124 and 125, the first refrigeration surface 124 abuts against the battery cell 12 of the first battery cell module, and the second refrigeration surface 125 abuts against the second battery cell module.

[0133] It can be understood that the bottom plate 112 of the first cell module is arranged between the cell 12 of the first cell module and the second cell module, the first cooling surface 124 of the bottom plate 112 of the first cell module can cool the cell 12 of the first cell module, and the second cooling surface 125 of the bottom plate 112 of the first cell module can cool the second cell module, so that the cell 12 of the first cell module and the second cell module are cooled at the same time, the cell 12 of the first cell module and the second cell module share one bottom plate 112 of the first cell module, and the structure of the battery pack is simplified. The heat conduction member 123 can conduct heat between the first cooling surface 124 and the second cooling surface 125, which is beneficial to uniform the temperature between the cell 12 of the first cell module and the second cell module, reduce the temperature difference between the first cell module and the second cell module, improve the temperature uniformity of the battery pack, and is beneficial to improve the cycle life of the battery pack.

[0134] For example, the bottom plate 112 of the first cell module can be integrally formed, or can be spliced by different components.

[0135] In some examples, the heat conduction member 123 is, for example, a heat conduction structural adhesive or a heat conduction gasket.

[0136] In some embodiments, as Figure 11 and Figure 12 The bottom plate 112 of the first cell module includes a first cold plate 126 and a second cold plate 127 arranged opposite to each other, and the heat conduction member 123 connects the first cold plate 126 and the second cold plate 127. The first cold plate 126 is formed with the first cooling surface 124 on the side away from the second cold plate 127, and the second cold plate 127 is formed with the second cooling surface 125 on the side away from the first cold plate 126.

[0137] It can be understood that the first cold plate 126 is formed with the first cooling surface 124, that is, the first cold plate 126 can cool the cell 12 of the first cell module, and the second cold plate 127 is formed with the second cooling surface 125, that is, the second cold plate 127 can cool the second cell module. The heat conduction member 123 connects the first cold plate 126 and the second cold plate 127, and the first cold plate 126 and the second cold plate 127 can exchange heat through the heat conduction member 123, which improves the temperature uniformity between the first cold plate 126 and the second cold plate 127, that is, the first cold plate 126 and the second cold plate 127 can cool the cell 12 of the first cell module at the same time, and the first cold plate 126 and the second cold plate 127 can cool the second cell module at the same time, thereby reducing the temperature difference between the cell 12 of the first cell module and the second cell module, improving the temperature uniformity of the battery pack, and being beneficial to improve the cycle life of the battery pack.

[0138] In some examples, as Figure 11 andFigure 12 The heat conduction member 123 is located between the first cold plate 126 and the second cold plate 127 to connect the first cold plate 126 and the second cold plate 127. The heat conduction member 123 can also be located on one side of the first cold plate 126 and the second cold plate 127, for example, at the side wall surface of the first cold plate 126, and the heat conduction member 123 connects the side wall surfaces of the first cold plate 126 and the second cold plate 127.

[0139] In some embodiments, as Figure 11 and Figure 12 The first cold plate 126 is formed with at least two first flow channel groups 1261, and a first containing space 1262 is arranged between adjacent two first flow channel groups 1261, and part of the heat conduction member 123 is located at the first containing space 1262.

[0140] It can be understood that the at least two first flow channel groups 1261 are sequentially communicated, and the part of the heat conduction member 123 is arranged at the first containing space 1262 between the adjacent two first flow channel groups 1261, so that the heat conduction member 123 can improve the temperature uniformity between the adjacent two first flow channel groups 1261, so that the first cold plate 126 can uniformly cool the battery cells 12 of the first battery cell module. At the same time, since the heat conduction member 123 connects the first cold plate 126 and the second cold plate 127, the heat conduction member 123 can make each first flow channel group 1261 can exchange heat with the second cold plate 127, improve the temperature uniformity between the first cold plate 126 and the second cold plate 127, and further reduce the temperature difference between the battery cells 12 of the first battery cell module and the second battery cell module, improve the temperature uniformity of the battery pack, and is beneficial to improve the cycle life of the battery pack.

[0141] In some embodiments, as Figure 11 and Figure 12 The first flow channel group 1261 includes at least two first refrigeration flow channels 1263, and part of the heat conduction member 123 is located between adjacent two first refrigeration flow channels 1263.

[0142] It can be understood that the at least two first refrigeration flow channels 1263 are sequentially communicated, and the part of the heat conduction member 123 is arranged between the adjacent two first refrigeration flow channels 1263, so that the heat conduction member 123 can improve the temperature uniformity between the adjacent two first refrigeration flow channels 1263, so that the first cold plate 126 can uniformly cool the battery cells 12 of the first battery cell module. At the same time, since the heat conduction member 123 connects the first cold plate 126 and the second cold plate 127, the heat conduction member 123 can make each first refrigeration flow channel 1263 can exchange heat with the second cold plate 127, improve the temperature uniformity between the first cold plate 126 and the second cold plate 127, and further reduce the temperature difference between the battery cells 12 of the first battery cell module and the second battery cell module, improve the temperature uniformity of the battery pack, and is beneficial to improve the cycle life of the battery pack.

[0143] In some embodiments, as Figure 11 and Figure 12 The second cold plate 127 is formed with at least two second flow channel groups 1271, and a second containing space 1272 is arranged between adjacent two second flow channel groups 1271, and the partial heat conduction member 123 is arranged at the second containing space 1272.

[0144] It can be understood that the at least two second flow channel groups 1271 are sequentially communicated, and the partial heat conduction member 123 is arranged at the second containing space 1272 between the adjacent two second flow channel groups 1271, so that the heat conduction member 123 can improve the temperature uniformity between the adjacent two second flow channel groups 1271, so that the second cold plate 127 can uniformly cool the second battery cell module. At the same time, since the heat conduction member 123 connects the first cold plate 126 and the second cold plate 127, the heat conduction member 123 can make each second flow channel group 1271 be in heat exchange with the first cold plate 126, improve the temperature uniformity between the first cold plate 126 and the second cold plate 127, and further reduce the temperature difference between the battery cell 12 of the first battery cell module and the second battery cell module, improve the temperature uniformity of the battery pack, and be beneficial to improve the cycle life of the battery pack.

[0145] In some embodiments, as Figure 11 and Figure 12 The second flow channel group 1271 includes at least two second refrigeration flow channels 1273, and the partial heat conduction member 123 is arranged between adjacent two second refrigeration flow channels 1273.

[0146] It can be understood that the at least two second refrigeration flow channels 1273 are sequentially communicated, and the partial heat conduction member 123 is arranged between the adjacent two second refrigeration flow channels 1273, so that the heat conduction member 123 can improve the temperature uniformity between the adjacent two second refrigeration flow channels 1273, so that the second cold plate 127 can uniformly cool the second battery cell module. At the same time, since the heat conduction member 123 connects the first cold plate 126 and the second cold plate 127, the heat conduction member 123 can make each second refrigeration flow channel 1273 be in heat exchange with the first cold plate 126, improve the temperature uniformity between the first cold plate 126 and the second cold plate 127, and further reduce the temperature difference between the battery cell 12 of the first battery cell module and the second battery cell module, improve the temperature uniformity of the battery pack, and be beneficial to improve the cycle life of the battery pack.

[0147] In some embodiments, the at least two first flow channel groups 1261 and the at least two second flow channel groups 1271 are staggered. The cooling uniformity of the bottom plate 112 of the first battery cell module can be effectively improved, so that the bottom plate 112 of the first battery cell module can uniformly cool the battery cell 12 of the first battery cell module and the second battery cell module, and the temperature difference between the battery cell 12 of the first battery cell module and the second battery cell module is reduced.

[0148] According to the embodiments of the second aspect of the application, the power equipment includes the battery pack.

[0149] According to the power equipment of the embodiments of the application, the battery pack installs the battery cell module 6 in the accommodating cavity 41 of the box body 4, and sets at least part of the electrical components 7 outside the accommodating cavity 41, so that at least part of the electrical components 7 does not occupy the space of the accommodating cavity 41, the size of the accommodating cavity 41 can be reduced, and then the volume of the box body 4 can be reduced. After the volume of the box body 4 is reduced, the weight is also reduced, and then the weight of the battery pack can be reduced, the cost of the battery pack is reduced, and then the manufacturing cost of the power equipment is reduced.

[0150] At the same time, the electrical components 7 are set outside the accommodating cavity 41, when the electrical components 7 of the battery pack need to be repaired and replaced, the box body 4 does not need to be opened, the maintenance of the battery pack is facilitated, and then the repair and maintenance of the power equipment is facilitated.

[0151] It should be noted that the power equipment can be a vehicle, an aircraft, or a household appliance. It should be noted that the foregoing is only an example of the power equipment, and does not specially limit the power equipment.

[0152] The embodiments of the application are described in detail above, and the specific examples are applied to the principle and implementation mode of the application. The above description of the embodiments is only used to help understand the method of the application and its core idea; at the same time, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed, and the above description of the embodiments should not be understood as a limitation of the application.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body, which is formed with a containing cavity; a cell module, which comprises a plurality of cells, and each of the plurality of cells is arranged in the containing cavity; an electrical assembly, which is connected with the cell module, and at least part of the electrical assembly is located outside the containing cavity.

2. The battery pack of claim 1, wherein, At least part of the electrical assembly is arranged on the outer wall surface of the box body; and / or, the battery pack further comprises a first cover plate, which is connected to the outer wall surface of the box body, and a first space is formed between the first cover plate and the outer wall surface of the box body, and at least part of the electrical assembly is located in the first space.

3. The battery pack of claim 1, wherein, The battery pack further comprises a connecting row, one end of the connecting row is located in the containing cavity and is electrically connected with the cell module, and the other end of the connecting row extends to outside the containing cavity and is connected with the electrical assembly.

4. The battery pack of claim 3, wherein, The box body is formed with a first connecting hole which communicates with the containing cavity, the first connecting hole is opposite to the output pole of the cell module, and the other end of the connecting row is arranged in the first connecting hole to be located outside the containing cavity.

5. The battery pack of claim 3, wherein, The connecting row comprises a first connecting block, a second connecting block and a bending block, the extension directions of the first connecting block and the second connecting block are different, and the bending block connects the first connecting block and the second connecting block.

6. The battery pack of any one of claims 3 to 5, wherein, The electrical assembly comprises a high-voltage connector, the high-voltage connector is arranged on the outer wall surface of the box body, and the other end of the connecting row is electrically connected with the high-voltage connector.

7. The battery pack of claim 6, wherein, The electrical assembly comprises a high-voltage connector, the high-voltage connector is arranged on the outer wall surface of the box body, and the other end of the connecting row is electrically connected with the high-voltage connector.

8. The battery pack of any one of claims 1 to 5, wherein, The electrical assembly comprises a BMS module, the BMS module is arranged on the outer wall surface of the box body, and the cell module is electrically connected with the BMS module.

9. The battery pack of claim 8, wherein, The box body is formed with a second connecting hole which communicates with the containing cavity, the electrical assembly comprises a connecting wire harness, one end of the connecting wire harness is electrically connected with the cell module, and the other end of the connecting wire harness is arranged in the second connecting hole to extend to outside the containing cavity and is electrically connected with the BMS module.

10. The battery pack of any one of claims 1 to 5, wherein, The electrical assembly comprises an MSD module, the MSD module is arranged on the outer wall surface of the box body; and / or, The electrical assembly comprises a PDU module, the PDU module is arranged on the outer wall surface of the box body.

11. An electrical device, characterized by The battery pack comprises any one of the battery packs according to claims 1 to 10.

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