Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a box body, at least two sequentially stacked battery cell modules and a first connecting assembly, a containing cavity is formed in the box body, the at least two sequentially stacked battery cell modules are installed in the containing cavity, the first connecting assembly is connected with the at least two battery cell modules, and the first connecting assembly is fixedly connected with the box body. According to the battery pack disclosed by the invention, the at least two battery cell modules are connected together through the first connecting assembly, so that the convenience of mounting the battery cell modules in the accommodating cavity of the box body is improved, and the first connecting assembly is fixedly connected with the box body, so that the mounting stability of the battery cell modules in the box body is improved.

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 is widely used in the fields of energy storage systems, vehicles and consumer electronics. The battery pack mainly includes a box body and a battery cell module installed in the box body.

[0003] In the related art, the battery pack generally includes at least two battery cell modules, which are sequentially installed in the box body. The installation convenience needs to be improved. UTILITY MODEL CONTENT

[0004] Embodiments of the present application provide a battery pack and an electric device, which can improve the technical problem of insufficient installation convenience.

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

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

[0007] at least two battery cell modules stacked in sequence, which are installed in the accommodation cavity;

[0008] a first connecting assembly, which connects the at least two battery cell modules, and the first connecting assembly is fixedly connected with the box body.

[0009] In an embodiment, the first connecting assembly includes a fixing frame, the side wall surface of the battery cell module is connected with the fixing frame, and the side of the fixing frame away from the battery cell module is connected with the box body.

[0010] In an embodiment, the fixing frame includes a horizontal plate and at least two vertical plates, the at least two vertical plates include a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are arranged side by side, the side wall surface of each battery cell module is connected with the first vertical plate, the side wall surface of each battery cell module is connected with the second vertical plate, and the horizontal plate connects the first vertical plate and the second vertical plate.

[0011] In an embodiment, the first connecting assembly further includes at least three fixing connectors, the fixing connectors connect the battery cell modules and the box body, and the at least three fixing connectors are sequentially arranged along the height direction of the box body.

[0012] In an embodiment, the at least three fixing connectors include a first fixing bracket, one end of the box body forms a mounting opening in communication with the accommodation cavity, an end surface of one end of the box body forms a mounting groove, the first fixing bracket is arranged in the mounting groove, and the first fixing bracket connects the battery cell modules and the box body.

[0013] In an embodiment, the at least three fixed connectors include a second fixed support, a mounting hole is formed in a side wall of the box body, the second fixed support is arranged in the mounting hole, and the second fixed support connects the battery cell module and the box body.

[0014] In an embodiment, the battery pack further includes a second connecting assembly, the second connecting assembly connects side walls of two adjacent battery cell modules.

[0015] In an embodiment, the battery cell module includes a shell and a battery cell, the shell is formed with a mounting cavity, the battery cell is mounted in the mounting cavity, a bottom plate of the shell is a cold plate, and a bottom plate of the shell of at least part of the battery cell module abuts against a top plate of the shell of an adjacent battery cell module.

[0016] In an embodiment, a heat conduction layer is arranged between two adjacent battery cell modules.

[0017] In an embodiment, two adjacent battery cell modules are detachably connected.

[0018] In a second aspect, an embodiment of the present application provides a power utilization device, including the battery pack.

[0019] The embodiment of the present application has the following beneficial effects:

[0020] In the embodiment of the present application, at least two battery cell modules are connected together by the first connecting assembly, the connection and fixation of the at least two battery cell modules are realized, the at least two battery cell modules are integrated as a whole, and the installation and movement of the at least two battery cell modules are facilitated. That is, the at least two battery cell modules are connected together by the first connecting assembly, the convenience of the installation of the battery cell module in the accommodating cavity of the box body is improved, and the first connecting assembly is fixedly connected with the box body, and the installation stability of the battery cell module in the box body is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. 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 creative effort.

[0022] Figure 1 is a structural schematic diagram of a battery pack provided by an embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of a battery cell module provided by an embodiment of the present application;

[0024] Figure 3 is a side view of an electric cell module provided by an embodiment of the present application;

[0025] Figure 4 is a structural schematic view of a battery pack provided by an embodiment of the present application;

[0026] Figure 5 is a sectional view of a battery pack provided by an embodiment of the present application;

[0027] Figure 6 is one of structural schematic views of a bottom plate provided by an embodiment of the present application;

[0028] Figure 7 is another structural schematic view of a bottom plate provided by an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work under the premise of the present application, all belong to the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are 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 the specific direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device.

[0030] The battery pack and the electric equipment of the present application will be described below. Figures 1 to 7

[0031] According to the embodiments of the first aspect of the present application, such as Figure 1 and Figure 3 , the battery pack comprises a box body 4, at least two electric cell modules 1 stacked in sequence, and a first connecting assembly 3, the box body 4 is formed with a receiving cavity 41, the at least two electric cell modules 1 stacked in sequence are installed in the receiving cavity 41, the first connecting assembly 3 is connected to the at least two electric cell modules 1, and the first connecting assembly 3 is fixedly connected with the box body 4.

[0032] ​According to the battery pack provided in the embodiments of the present application, the first connecting assembly 3 is used to connect the at least two battery cell modules 1 together, so that the at least two battery cell modules 1 are fixed and connected together, and the at least two battery cell modules 1 are integrated as a whole, thereby facilitating the installation and movement of the at least two battery cell modules 1. That is, the first connecting assembly 3 is used to connect the at least two battery cell modules 1 together, thereby improving the convenience of the installation of the battery cell modules 1 in the accommodating cavity of the box body 4, and the first connecting assembly 3 is fixedly connected with the box body 4, thereby improving the installation stability of the battery cell modules 1 in the box body 4.

[0033] In some embodiments, as Figure 3 , the first connecting assembly 3 comprises a fixing frame 30, the side wall surface of the battery cell module 1 is connected with the fixing frame 30, and the side, away from the battery cell module 1, of the fixing frame 30 is connected with the box body 4.

[0034] It can be understood that the fixing frame 30 is used to fixedly connect different battery cell modules 1 together, so as to position the at least two battery cell modules 1 which are stacked in sequence, thereby facilitating the subsequent installation and movement of the battery cell modules 1.

[0035] In some examples, the side wall surface of each battery cell module 1 is connected with the fixing frame 30.

[0036] Specifically, as Figure 3 , the fixing frame 30 comprises a horizontal plate 31 and at least two vertical plates 32, the at least two vertical plates 32 comprise a first vertical plate 32 and a second vertical plate 32, the first vertical plate 32 and the second vertical plate 32 are arranged side by side, the side wall surface of each battery cell module 1 is connected with the first vertical plate 32, the side wall surface of each battery cell module 1 is connected with the second vertical plate 32, and the horizontal plate 31 connects the first vertical plate 32 and the second vertical plate 32.

[0037] It can be understood that the first vertical plate 32 is used to fixedly connect the at least two battery cell modules 1 which are stacked in sequence together, and the second vertical plate 32 is used to fixedly connect the at least two battery cell modules 1 which are stacked in sequence together, thereby improving the fixed connection effect between different battery cell modules 1.

[0038] The horizontal plate 31 is used to connect the first vertical plate 32 and the second vertical plate 32, so that the first vertical plate 32 and the second vertical plate 32 are connected, thereby improving the fixed connection effect of different battery cell modules 1.

[0039] In some embodiments, as Figure 4 and Figure 5 , the first connecting assembly 3 comprises at least three fixed connecting pieces 5, the fixed connecting pieces 5 connect the battery cell module 1 and the box body 4, and the at least three fixed connecting pieces 5 are arranged in sequence along the height direction of the box body 4.

[0040] It can be understood that the different fixed connectors 5 are at different heights, that is, the assembly of at least two battery cell modules 1 and the at least three fixed positions of the box body 4 are at different heights, which can effectively disperse the load, reduce the force arm, and make the battery more resistant to impact and vibration.

[0041] In some embodiments, as Figure 4 and Figure 5 , the at least three fixed connectors 5 include 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 face of the one end of the box body 4 is formed with a mounting groove 42, the first fixed support 51 is arranged in the mounting groove 42, and the first fixed support 51 connects the battery cell module 1 and the box body 4.

[0042] It can be understood that the first fixed support 51 can fixedly connect the battery cell module 1 and the box body 4 together. At the same time, the mounting groove 42 for mounting the first fixed support 51 is arranged at the end face 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 as to facilitate the fixed connection of the first fixed support 51 and the battery cell module 1, and facilitate the fixed connection of the first fixed support 51 and the box body 4.

[0043] For example, along the height direction of the box body 4, the depth of the mounting groove 42 is greater than the height of the first fixed support 51, so that the first fixed support 51 does not protrude from the box body 4 after being mounted in the mounting groove 42, and the height of the box body 4 is not affected by the first fixed support 51.

[0044] In some embodiments, as Figure 4 and Figure 5 , the at least three fixed connectors 5 include a second fixed support 52, the side wall of the box body 4 is formed with a mounting hole 43, the second fixed support 52 is arranged in the mounting hole 43, and the second fixed support 52 connects the battery cell module 1 and the box body 4.

[0045] It can be understood that the second fixed support 52 can fixedly connect the battery cell module 1 and the box body 4 together. At the same time, the mounting hole 43 for accommodating the second fixed support 52 is formed in the side wall of the box body 4, and when the second fixed support 52 is arranged in the mounting hole 43, the second fixed support 52 can be operated through the mounting hole 43, so as to facilitate the fixed connection of the second fixed support 52 and the battery cell module 1, and facilitate the fixed connection of the second fixed support 52 and the box body 4.

[0046] In some embodiments, the middle part of the inner side wall of the box body 4 is connected with the side wall surface of the battery cell module 1 through a connecting block.

[0047] In some embodiments, the battery pack further comprises a second connecting assembly 2 connecting the side wall surfaces of the two adjacent battery cell modules 1.

[0048] It can be understood that the two adjacent battery cell modules 1 are connected together by the second connecting assembly 2, so that the two adjacent battery cell modules 1 are kept connected, so that the top and bottom of the two adjacent battery cell modules 1 abut, and then the bottom plate 112 of the shell 11 of one of the battery cell modules 1 can cool and dissipate heat for the top of the adjacent battery cell module 1. At the same time, the second connecting assembly 2 is connected to the side wall surface of the battery cell module 1, so that the second connecting assembly 2 does not affect the stacking of the two adjacent battery cell modules 1, that is, there is no gap between the two adjacent battery cell modules 1, so that the bottom plate 112 of the shell 11 of the current battery cell module 1 can cool and dissipate heat for the top of the adjacent battery cell module 1.

[0049] In some examples, as Figure 3 , the second 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 modules 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 modules 1, that is, the connection of the two adjacent battery cell modules 1 is realized.

[0050] Specifically, the connecting sheet 21 is provided with connecting holes at both ends, a fastener is passed through 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 modules 1, that is, the one end of the connecting sheet 21 is connected to the side wall surface of one of the two adjacent battery cell modules 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 modules 1.

[0051] In some embodiments, as Figure 1 and Figure 2 , the battery cell module 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, the bottom plate 112 of the shell 11 is a cold plate, and the bottom plate 112 of at least part of the shell 11 of the battery cell module 1 abuts against the top plate of the shell 11 of the adjacent battery cell module 1.

[0052] It can be understood that, by stacking the at least two battery cell modules 1 in sequence, the bottom plate 112 of the shell 11 of at least part of the battery cell modules 1 will abut against the top plate of the shell 11 of the adjacent battery cell module 1, so that the bottom plate 112 of the shell 11 of at least part of the battery cell modules 1 can cool and dissipate heat for the battery cells 12. The cold plate is part of the structure of the shell 11, which simplifies the structure of the battery cell module 1. At the same time, the bottom plate 112 can also cool and dissipate heat for the top of the adjacent battery cell module 1, that is, for the top of the battery cells 12 of the adjacent battery cell module 1, thereby realizing the reuse of the bottom plate 112 of the shell 11 of the battery cell module 1. The bottom plate 112 can simultaneously cool and dissipate heat for the bottom of the current battery cell module 1 and the top of the adjacent battery cell module 1, which simplifies the structure of the battery pack and realizes the simultaneous cooling and heat dissipation for the bottom and top of the battery cells 12 of at least part of the battery cell modules 1. This increases the cooling effect of the battery cells 12, improves the temperature consistency of the battery cells 12, reduces the temperature difference between different ends of the battery cells 12, and is conducive to improving the cycle life of the battery cells 12.

[0053] For example, the battery pack includes 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 simultaneously cool and dissipate heat for the top of the first battery cell module and the bottom of the second battery cell module, and the bottom plate 112 of the shell 11 of the third battery cell module can simultaneously cool and dissipate heat for the bottom of the third battery cell module and the top of the second battery cell module. That is, the bottom and top of at least the first battery cell module and the second battery cell module can be simultaneously cooled and heat-dissipated.

[0054] In some examples, the battery cell module 1 includes a plurality of battery cells 12 stacked together, and the shell 11 of the battery cell module 1 is provided with end plates on both sides. The end plates can pre-tighten the plurality of battery cells 12.

[0055] In some embodiments, as Figure 1 , a heat-conducting layer 13 is arranged between the two adjacent battery cell modules 1.

[0056] It can be understood that, by arranging the heat-conducting layer 13 between the two adjacent battery cell modules 1, the heat transfer effect between the two adjacent battery cell modules 1 can be improved, so that the bottom plate 112 of the shell 11 of one of the battery cell modules 1 can effectively cool and dissipate heat for the top of the adjacent battery cell module 1.

[0057] For example, the heat-conducting layer 13 is, for example, a heat-conducting structural adhesive or a heat-conducting gasket.

[0058] In some embodiments, the two adjacent battery cell modules 1 are detachably connected, which facilitates the maintenance and replacement of the battery cell module 1.

[0059] In some embodiments, as Figure 6 and Figure 7 At least two sequentially stacked battery cell modules 1 include a first battery cell module and a second battery cell module, the bottom plate 112 of the housing 11 of the first battery cell module includes a heat conduction member 123 and oppositely arranged first and second cooling surfaces 124 and 125, the heat conduction member 123 connects the first and second cooling surfaces 124 and 125, the first cooling surface 124 abuts the battery cell 12 of the first battery cell module, and the second cooling surface 125 abuts the second battery cell module.

[0060] It can be understood that by arranging the bottom plate 112 of the first battery cell module between the battery cell 12 of the first battery cell module and the second battery cell module, the first cooling surface 124 of the bottom plate 112 of the first battery cell module can cool and dissipate heat from the battery cell 12 of the first battery cell module, and the second cooling surface 125 of the bottom plate 112 of the first battery cell module can cool and dissipate heat from the second battery cell module, thereby achieving simultaneous cooling and heat dissipation of the battery cell 12 of the first battery cell module and the second battery cell module. The battery cell 12 of the first battery cell module and the second battery cell module share one bottom plate 112 of the first battery cell module, simplifying the structure of the battery. The heat conduction member 123 can conduct heat between the first and second cooling surfaces 124 and 125, which is conducive to uniform temperature between the battery cell 12 of the first battery cell module and the second battery cell module, reduces the temperature difference between the first battery cell module and the second battery cell module, and improves the temperature uniformity of the battery, which is conducive to improving the cycle life of the battery.

[0061] For example, the bottom plate 112 of the first battery cell module can be integrally formed or can be spliced from different components.

[0062] In some examples, the heat conduction member 123 is, for example, a heat-conducting structural adhesive or a heat-conducting gasket.

[0063] In some embodiments, as Figure 6 and Figure 7 The bottom plate 112 of the first battery cell module includes oppositely arranged first and second cold plates 126 and 127, the heat conduction member 123 connects the first and second cold plates 126 and 127, the first cold plate 126 has the first cooling surface 124 formed on the side facing away from the second cold plate 127, and the second cold plate 127 has the second cooling surface 125 formed on the side facing away from the first cold plate 126.

[0064] It can be understood that the first cold plate 126 is formed with the first refrigeration surface 124, that is, the first cold plate 126 can cool and dissipate heat of the battery cell 12 of the first battery cell module, and the second cold plate 127 is formed with the second refrigeration surface 125, that is, the second cold plate 127 can cool and dissipate heat of the second battery 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, thereby improving 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 both cool and dissipate heat of the battery cell 12 of the first battery cell module, and at the same time, the first cold plate 126 and the second cold plate 127 can both cool and dissipate heat of the second battery cell module, thereby reducing the temperature difference between the battery cell 12 of the first battery cell module and the second battery cell module, improving the temperature uniformity of the battery, and being beneficial to improving the cycle life of the battery.

[0065] In some examples, as Figure 6 and Figure 7 , 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.

[0066] In some embodiments, as Figure 6 and Figure 7 , 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.

[0067] 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 and dissipate heat of the battery cell 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 exchange heat with the second cold plate 127, thereby improving the temperature uniformity between the first cold plate 126 and the second cold plate 127, and further reducing the temperature difference between the battery cell 12 of the first battery cell module and the second battery cell module, improving the temperature uniformity of the battery, and being beneficial to improving the cycle life of the battery.

[0068] In some embodiments, as Figure 6 and Figure 7The first flow channel group 1261 includes at least two first refrigeration flow channels 1263, and the partial heat conduction member 123 is located between adjacent two first refrigeration flow channels 1263.

[0069] It can be understood that the at least two first refrigeration flow channels 1263 are sequentially communicated, and the partial heat conduction member 123 is arranged between adjacent two first refrigeration flow channels 1263, so that the heat conduction member 123 can improve the temperature uniformity between 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, and is beneficial to improve the cycle life of the battery.

[0070] In some embodiments, as Figure 6 and Figure 7 The second cold plate 127 is formed with at least two second flow channel groups 1271, wherein a second containing space 1272 is arranged between adjacent two second flow channel groups 1271, and the partial heat conduction member 123 is located at the second containing space 1272.

[0071] 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 adjacent two second flow channel groups 1271, so that the heat conduction member 123 can improve the temperature uniformity between 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 can exchange heat 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 cells 12 of the first battery cell module and the second battery cell module, improve the temperature uniformity of the battery, and is beneficial to improve the cycle life of the battery.

[0072] In some embodiments, as Figure 6 and Figure 7 The second flow channel group 1271 includes at least two second refrigeration flow channels 1273, and the partial heat conduction member 123 is located between adjacent two second refrigeration flow channels 1273.

[0073] 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 dissipate heat for 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 can exchange heat 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, and be beneficial to improve the cycle life of the battery.

[0074] 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 dissipate heat for 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.

[0075] According to the embodiments of the second aspect of the application, the power equipment includes the battery pack.

[0076] According to the power equipment of the embodiments of the application, the at least two battery cell modules 1 are connected together through the first connecting assembly 3, the convenience when the battery cell module 1 is installed in the accommodating cavity of the box body 4 is improved, and the first connecting assembly 3 is fixedly connected with the box body 4, the installation stability of the battery cell module 1 in the box body 4 is improved.

[0077] 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.

[0078] The embodiments of the application are described in detail above, and the specific examples are applied to the principles and implementation modes of the application. The above description of the embodiments is only used to help understand the method and its core idea of the application; 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 application should not be understood as a limitation.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body, which is formed with a containing cavity; at least two electric cell modules, which are installed in the containing cavity in sequence; a first connecting assembly, which connects the at least two electric cell modules and is fixedly connected with the box body.

2. The battery pack of claim 1, wherein, The first connecting assembly comprises a fixing frame, the side wall surface of the electric cell module is connected with the fixing frame, and the side, away from the electric cell module, of the fixing frame is connected with the box body.

3. The battery pack of claim 2, wherein, The fixing frame comprises a horizontal plate and at least two vertical plates, the at least two vertical plates comprise a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are arranged side by side, the side wall surface of each electric cell module is connected with the first vertical plate, the side wall surface of each electric cell module is connected with the second vertical plate, and the horizontal plate connects the first vertical plate and the second vertical plate.

4. The battery pack of any one of claims 1 to 3, wherein, The first connecting assembly further comprises at least three fixing connecting pieces, the fixing connecting pieces connect the electric cell module and the box body, and the at least three fixing connecting pieces are arranged in sequence along the height direction of the box body.

5. The battery pack of claim 4, wherein, The at least three fixing connecting pieces comprise a first fixing support, one end of the box body is formed with a mounting opening which is in communication with the containing cavity, the end surface of one end of the box body is formed with a mounting groove, the first fixing support is arranged in the mounting groove, and the first fixing support connects the electric cell module and the box body.

6. The battery pack of claim 4, wherein, The at least three fixing connecting pieces comprise a second fixing support, the side wall of the box body is formed with a mounting hole, the second fixing support is arranged in the mounting hole, and the second fixing support connects the electric cell module and the box body.

7. The battery pack of any one of claims 1-3, wherein, The battery pack further comprises a second connecting assembly, which connects the side wall surfaces of two adjacent electric cell modules.

8. The battery pack of any one of claims 1-3, wherein, The electric cell module comprises a shell and an electric cell, the shell is formed with a mounting cavity, the electric cell is installed in the mounting cavity, the bottom plate of the shell is a cold plate, and the bottom plate of the shell of at least part of the electric cell modules abuts against the top plate of the shell of an adjacent electric cell module.

9. The battery pack of claim 8, wherein, A heat-conducting layer is arranged between two adjacent electric cell modules.

10. The battery pack of claim 8, wherein, Two adjacent electric cell modules are detachably connected.

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

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