Battery pack and electric device

Abstract

The battery pack comprises a battery pack box body and a battery unit, the battery unit is located in the battery pack box body, a plurality of heat dissipation pipes are evenly arranged in the battery pack box body at intervals, the battery unit is provided with a first through hole, the heat dissipation pipes penetrate through the first through hole, and the heat dissipation pipes penetrate through the first through hole. And the radiating pipe is communicated with the external environment of the battery pack box body. When the battery units are installed, the distances between the battery units and the bottom shell of the battery pack box body are basically consistent, heat dissipation of the battery units can be achieved when air is blown to the heat dissipation pipes, meanwhile, due to the fact that the distances between the battery units and the bottom shell of the battery pack box body are consistent, uniform heat dissipation of the battery units can be achieved, and the service life of the battery pack box body is prolonged. Therefore, the performance of the battery unit is effectively improved.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the continuous development of battery technology, batteries are more and more widely used in the field of electric vehicles. In order to improve the cruising range of electric vehicles, it is usually necessary to install more batteries, and increasing the number of batteries in the effective space will affect the heat dissipation of the batteries, so additional heat dissipation design is needed for the batteries.

[0003] At present, the cooling method of electric vehicle batteries on the market is mainly air cooling. The air cooling structure is simple and easy to realize. Generally, air flows from the outside of the battery to the inside of the battery and then flows out, but it cannot achieve waterproofing. In addition, when the battery is uniformly heated and dissipated, the battery is usually filled with glue as a whole, but due to the different heat dissipation conditions of the middle position and the edge position of the battery module, there is a large temperature difference between different battery cells in the heat dissipation process, thereby affecting the performance of the battery and bringing safety hazards to electric vehicles.

[0004] CONTENT

[0005] The application provides a battery pack and an electric device, which not only enables the battery to be uniformly cooled, but also is waterproof.

[0006] In order to solve the above technical problems, the application is implemented as follows:

[0007] The application provides a battery pack, which comprises a battery pack box body and a battery unit, and the battery unit is located in the battery pack box body; a plurality of heat dissipation pipes are uniformly and spacedly arranged in the battery pack box body, the battery unit is provided with a first through hole, and the heat dissipation pipes pass through the first through hole; and the heat dissipation pipes are in communication with the external environment of the battery pack box body.

[0008] Optionally, the battery unit comprises a plurality of battery cells, and at least three battery cells surround one first through hole along the radial direction of the battery cells.

[0009] Optionally, the battery pack box body comprises a bottom plate, a cover plate and a side frame, one end of the side frame is fixedly connected with the bottom plate, the other end of the side frame is fixedly connected with the cover plate, so as to form a closed accommodating cavity, a plurality of second through holes are arranged on the bottom plate, a plurality of third through holes are arranged on the cover plate, and the two ends of the heat dissipation pipes are sealingly connected with the second through holes and the third through holes respectively.

[0010] Optionally, the battery pack box body further comprises a sealing member.

[0011] The sealing member is arranged on the first end surface and / or the second end surface of the side frame, the first end surface being an end surface away from the bottom plate, and the second end surface being an end surface close to the bottom plate.

[0012] Optionally, the first end surface and / or the second end surface of the side frame is further provided with a groove, and the sealing member is embedded in the groove.

[0013] Optionally, the battery pack further comprises a fastener, the bottom plate is provided with a first mounting hole, the side frame is provided with a second mounting hole, and the cover plate is provided with a third mounting hole.

[0014] The fastener passes through the first mounting hole, the second mounting hole and the third mounting hole to connect the bottom plate, the side frame and the cover plate.

[0015] Optionally, the fastener is in sealed connection with the first mounting hole and the third mounting hole.

[0016] Optionally, in the axial direction of the second mounting hole, the projection of the second mounting hole is located outside the projection of the groove.

[0017] Optionally, the battery pack further comprises a fan, the fan is located outside the battery pack, the fan is arranged opposite to the pipe opening of the heat dissipation pipe, and the fan is fixedly connected with the cover plate or the bottom plate.

[0018] Optionally, the battery pack further comprises a control circuit board, the battery cell is further provided with a temperature sensor, and the control circuit board is fixedly arranged in the battery pack; the temperature sensor is connected with the battery cell and the control circuit board, and the control circuit board is electrically connected with the fan.

[0019] Optionally, the fan is provided with a first connecting portion, the control circuit board is provided with a second connecting portion, the cover plate is provided with a fourth through hole, and the first connecting portion is electrically connected with the second connecting portion through the fourth through hole.

[0020] Optionally, the first connecting portion is in sealed connection with the third mounting hole.

[0021] The application further provides a power utilization device, which comprises the battery pack.

[0022] Compared with the prior art, the technical scheme of the application has the following advantages:

[0023] The battery pack of the application comprises a battery pack box and battery cells, the battery cells are located in the battery pack box, a plurality of heat dissipation pipes are uniformly and spacedly arranged in the battery pack box, the battery cells are provided with first through holes, the heat dissipation pipes pass through the first through holes, and the heat dissipation pipes are in communication with the external environment of the battery pack box. When the installation of the battery cells is completed, the distance from the battery cells to the bottom shell of the battery pack box is basically consistent. At this time, the heat dissipation pipes are blown, and the heat dissipation of the battery cells can be realized. At the same time, since the distance from the battery cells to the bottom shell of the battery pack box is consistent, the uniform heat dissipation of the battery cells is realized. By arranging the sealing elements at the grooves of the side frames of the battery pack box and injecting the sealing glue at the openings of the box, the sealing and waterproof of the battery pack box are realized. In addition, a plurality of fans are installed outside the battery pack box, each fan is controlled by a control circuit board, the control circuit board can adjust the rotation of the fans according to the temperature and temperature difference of different areas inside the battery pack box, so that the temperature of the battery cells is maintained at a suitable level, and the performance of the battery pack is improved.

[0024] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the description of the embodiments, which follows, including the detailed description and the accompanying drawings.

[0026] Figure 1 is an exploded view of a battery pack provided by an embodiment of the application;

[0027] Figure 2 is a distribution diagram of a battery cell and a first through hole provided by an embodiment of the application;

[0028] Figure 3 is an exploded view of another battery pack provided by an embodiment of the application;

[0029] Figure 4 is a schematic diagram of a battery pack provided by an embodiment of the application;

[0030] Figure 5 is a front view of a battery pack provided by an embodiment of the application;

[0031] Figure 6 is a left view of a battery pack provided by an embodiment of the application;

[0032] Figure 7 is a top view of a battery pack provided by an embodiment of the application.

[0033] REFERENCE NUMERALS:

[0034] Battery pack case 10, heat dissipation pipe 11, accommodating cavity 111, bottom plate 12, second through hole 121, first mounting hole 122, cover plate 13, third through hole 131, third mounting hole 132, fourth through hole 133, side frame 14, groove 141, second mounting hole 142, first end surface 14a, second end surface 14b, sealing member 15, fastener 16, fan 17, first connecting portion 171, control circuit board 18, second connecting portion 181, battery cell 20, battery cell 21, first through hole 211, temperature sensor 212. DETAILED DESCRIPTION

[0035] The term "a plurality of" in the specification and claims of the present application means two or more. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship as shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0037] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0038] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] Reference Figures 1 to 3 is a schematic view of an internal structure of a battery pack, Figures 4 to 7 is a schematic view of a battery pack as a whole.

[0040] The application provides a battery pack, which comprises a battery pack box 10 and battery cells 20, the battery cells 20 being located in the battery pack box 10; a plurality of heat dissipation pipes 11 are uniformly and spacedly arranged in the battery pack box 10, the battery cells 20 are provided with first through holes 211, and the heat dissipation pipes 11 pass through the first through holes 211; the heat dissipation pipes 11 are in communication with the external environment of the battery pack box 10.

[0041] As shown in Figure 1 , the battery pack of the application comprises a battery pack box 10 and battery cells 20, the battery cells 20 being located in the battery pack box 10, a plurality of heat dissipation pipes 11 being uniformly and spacedly arranged in the battery pack box 10, the battery cells 20 being provided with first through holes 211, and the heat dissipation pipes 11 passing through the first through holes 211; when the battery cells 20 are installed, the distance from the battery cells 20 to the bottom shell of the battery pack box 10 is basically consistent. At this time, the heat dissipation pipes 11 are blown, and the heat dissipation of the battery cells 20 can be realized; at the same time, since the distance from the battery cells 20 to the bottom shell of the battery pack box 10 is consistent, the uniform heat dissipation of the battery cells 20 is realized, and the large temperature difference caused by the non-uniform heat dissipation of the battery cells 20 is avoided, thereby effectively improving the performance of the battery cells 20.

[0042] In the embodiment of the application, in the installation process of the battery cells 21, the heat dissipation pipes 11 pass through the first through holes 211; when the battery pack starts to work and dissipate heat, the heat is introduced into the heat dissipation pipes 11; at this time, the heat dissipation pipes 11 are blown, and the heat can be discharged out of the battery pack box 10. The material of the heat dissipation pipes 11 is usually metal material, including copper, aluminum or iron and the like, wherein the heat conductivity of copper and aluminum is better, and the copper and aluminum are commonly used for the heat dissipation of electronic devices; meanwhile, other special materials with better heat conductivity, such as heat-conducting silica gel, heat-conducting silicone grease and the like, can also be selected.

[0043] Optionally, referring to Figure 2 , the battery cells 20 comprise a plurality of battery cells 21, and at least three battery cells 21 enclose a first through hole 211 along the radial direction of the battery cells 21.

[0044] In the embodiment of the application, the battery cells 21 are in cylindrical structure or square column structure, and the arrangement mode of the battery cells 21 is staggered arrangement or aligned arrangement. When the battery cells 21 adopt the staggered arrangement mode, at least three battery cells 21 can enclose a first through hole 211 along the radial direction of the battery cells 21; the battery cells 21 can be arranged in the form of triangular matrix or annular matrix, and both can enclose the first through hole 211, so as to improve the heat dissipation inside the battery cells 21. When the battery cells 21 adopt the aligned arrangement mode, the square matrix form can be selected, and the arrangement and spacing of the battery cells 21 can be reasonably adjusted according to the need, so as to realize the high-density integration of the battery cells 21 and improve the heat dissipation efficiency; of course, other matrix forms can also be adopted for arrangement.

[0045] Optionally, referring to Figure 3 , the battery pack box 10 comprises a bottom plate 12, a cover plate 13 and a side frame 14, one end of the side frame 14 is fixedly connected with the bottom plate 12, and the other end of the side frame 14 is fixedly connected with the cover plate 13 to form a containing cavity 111;

[0046] A plurality of second through holes 121 are arranged on the bottom plate 12, and a plurality of third through holes 131 are arranged on the cover plate 13;

[0047] Both ends of the heat dissipation pipe 11 are sealingly connected with the second through holes 121 and the third through holes 131 respectively.

[0048] As shown in Figure 3 , the battery pack box comprises a bottom plate 12, a cover plate 13 and a side frame 14, one end of the side frame 14 is fixedly connected with the bottom plate 12, and the other end of the side frame 14 is fixedly connected with the cover plate 13 to form a containing cavity 111. Since the battery pack box is sealed, it can meet the waterproof requirement, and at the same time, it can avoid the entry of dust, thereby ensuring the effective operation of the battery. In addition, the battery pack box 10 is designed as a regular box shape, which is also beneficial to the installation of the battery and the transportation of the box.

[0049] A plurality of second through holes 121 are arranged on the bottom plate 12, and a plurality of third through holes 131 are arranged on the cover plate, the number of the second through holes 121, the third through holes 131 and the heat dissipation pipe 11 is equal, and the distribution positions of the second through holes 121 and the third through holes 131 also one-to-one correspond. Both ends of the heat dissipation pipe 11 are connected with the second through holes 121 and the third through holes 131 respectively, when the heat dissipation pipe 11 is blown, the wind will take away the heat in the heat dissipation pipe 11, thereby realizing the heat dissipation of the heat dissipation pipe 11. And since the heat dissipation pipe 11 is sealingly connected with the second through holes 121 and the third through holes 131, when the heat dissipation pipe 11 is blown, the moisture in the air will not penetrate into the inside of the battery pack box 10 from the second through holes 121 and the third through holes 131, thereby realizing the waterproof of the battery pack box 10.

[0050] In the embodiments of the present application, the shapes of the second through hole 121 and the third through hole 131 can be circular, oval, rectangular, and the like, and the shapes of the pipe openings of the heat dissipation pipe 11 can also be circular, oval, rectangular, and the like, but the shapes and sizes of the corresponding second through hole 121, third through hole 131, and heat dissipation pipe 11 pipe opening should be the same. When the materials of the bottom plate 12, cover plate 13, and heat dissipation pipe 11 are all metal materials, the heat dissipation pipe 11 can be connected with the second through hole 121 and the third through hole 131 by welding or gluing, which not only meets the requirements of ventilation and heat dissipation, but also achieves waterproofing. When the materials of the bottom plate 12, cover plate 13, and heat dissipation pipe 11 are all non-metal materials, the heat dissipation pipe 11 can be connected with the second through hole 121 and the third through hole 131 by gluing or hot-pressing, which also achieves waterproofing.

[0051] Optionally, referring to Figure 3 , the battery pack box 10 further comprises a sealing member 15;

[0052] The sealing member 15 is laid on the first end face 14a and / or the second end face 14b of the side frame 14, the first end face 14a being an end face away from the bottom plate 12, and the second end 14b being an end face close to the bottom plate 12.

[0053] As shown in Figure 3 , the battery pack box 10 comprises a side frame 14 and a sealing member 15, the side frame 14 comprising a first end face 14a and a second end face 14b, wherein the first end face 14a is an end face away from the bottom plate 12, and the second end face 14b is an end face close to the bottom plate 12, and the sealing member 15 is laid on the first end face 14a and / or the second end face 14b of the side frame 14. When the first end face 14a is connected with the cover plate 13, there can be a gap at the connecting surface of the two, and at this time, the sealing member 15 laid at the connecting surface can effectively make up for the gap, thereby achieving the effect of waterproofing. Similarly, when the second end face 14b is connected with the bottom plate 12, the presence of the sealing member 15 can also achieve the effect of waterproofing, thereby avoiding water from flowing into the inside of the battery pack box 10.

[0054] In the embodiments of the application, when the first end surface 14a of the side frame 14 is detachably connected with the cover plate 13, and the second end surface 14b of the side frame 14 is welded with the bottom plate 12, the sealing member 15 is arranged on the first end surface 14a, so that the waterproof requirement of the first end surface 14a is met. When the second end surface 14b of the side frame 14 is detachably connected with the bottom plate 12, and the first end surface 14a of the side frame 14 is welded with the cover plate 13, the sealing member 15 is arranged on the second end surface 14b, so that the waterproof requirement of the second end surface 14b is met. When the first end surface 14a of the side frame 14 is detachably connected with the cover plate 13, and the second end surface 14b of the side frame 14 is also detachably connected with the bottom plate 12, the sealing member 15 is arranged on the first end surface 14a and the second end surface 14b, so that the waterproof requirement of the first end surface 14a and the second end surface 14b is met. The sealing member 15 is arranged around the end surface of the side frame 14, and waterproof glue can be further filled between the end surface and the sealing member 15, so that more waterproof effect is achieved. The sealing member 15 can be a plastic sealing rib, a rubber sealing rib or sealing glue, or other sealing waterproof materials.

[0055] Optionally, referring to Figure 1 and Figure 3 , the first end surface 14a and / or the second end surface 14b of the side frame 14 is / are further provided with a groove 141, and the sealing member 15 is embedded in the groove 141.

[0056] The groove 141 is arranged on the first end surface 14a and / or the second end surface 14b, and the sealing member 15 is embedded in the groove 141. When the first end surface 14a is connected with the cover plate 13, a gap can exist between the connecting surfaces of the two, and the sealing member 15 is embedded in the groove 141 and partially protrudes from the groove 141, so that the sealing member 14 can effectively compensate for the gap, thereby achieving the waterproof effect. When the groove 141 is an annular groove, the sealing member 15 can be arranged around the side frame 14, so that the sealing and waterproof effect of the battery pack box body is better. Similarly, when the second end surface 14b is connected with the bottom plate 12, the sealing member 15 can also play a role in waterproofing, so that water can be prevented from flowing into the inside of the battery pack box body 10.

[0057] Optionally, referring to Figure 1 and Figure 3 , the battery pack box body 10 further comprises a fastener 16, the bottom plate 12 is provided with a first mounting hole 122, the side frame 14 is provided with a second mounting hole 142, and the cover plate 13 is provided with a third mounting hole 132.

[0058] The fastener 16 passes through the first mounting hole 122, the second mounting hole 142 and the third mounting hole 132, and connects the bottom plate 12, the side frame 14 and the cover plate 13.

[0059] AsFigure 1 And Figure 3 As shown in FIG. 1, the fastener 16 passes through the first mounting hole 122, the second mounting hole 142 and the third mounting hole 132 to connect the bottom plate 12, the side frame 14 and the cover plate 13. When the fastener 16 tightly connects the bottom plate 12, the side frame 14 and the cover plate 13 together, they can form a containing cavity 111, so as to avoid the entry of water and dust into the battery pack case 10, and make the battery better perform.

[0060] In the embodiment of the present application, the fastener 16 for connection can be a bolt or a pin, as long as it can fixedly connect the bottom plate 12, the side frame 14 and the cover plate 13, and can be detachable. The second mounting hole 142 is located on the side frame 14, and the fastener 16 needs to pass through the second mounting hole 142, so the second mounting hole 142 must be a through hole. The first mounting hole 122 and the third mounting hole 132 can be designed in cooperation with each other. When the first mounting hole 122 is a through hole, the third mounting hole 132 can be a through hole or a blind hole. The fastener 16 can be inserted from the first mounting hole 122, pass through the second mounting hole 142, and then be inserted into the third mounting hole 132. When the third mounting hole 132 is a through hole, the first mounting hole 122 can be a through hole or a blind hole. At this time, the fastener 16 can be inserted from the third mounting hole 132, pass through the second mounting hole 142, and then be inserted into the first mounting hole 122.

[0061] Optionally, the fastener 16 is sealingly connected with the first mounting hole 122 and the third mounting hole 132.

[0062] As shown in FIG. 1, the fastener 16 passes through the first mounting hole 122, the second mounting hole 142 and the third mounting hole 132 to connect the bottom plate 12, the side frame 14 and the cover plate 13. When the fastener 16 tightly connects the bottom plate 12, the side frame 14 and the cover plate 13 together, they can form a containing cavity 111, so as to avoid the entry of water and dust into the battery pack case 10, and make the battery better perform. Figure 1 And Figure 3 As shown in FIG. 1, the fastener 16 passes through the first mounting hole 122, the second mounting hole 142 and the third mounting hole 132 to connect the bottom plate 12, the side frame 14 and the cover plate 13. When the fastener 16 tightly connects the bottom plate 12, the side frame 14 and the cover plate 13 together, they can form a containing cavity 111, so as to avoid the entry of water and dust into the battery pack case 10, and make the battery better perform.

[0063] Optionally, in the axial direction of the second mounting hole 142, the projection of the second mounting hole 142 is located outside the projection of the groove 141.

[0064] As shown in FIG. 1, the fastener 16 passes through the first mounting hole 122, the second mounting hole 142 and the third mounting hole 132 to connect the bottom plate 12, the side frame 14 and the cover plate 13. When the fastener 16 tightly connects the bottom plate 12, the side frame 14 and the cover plate 13 together, they can form a containing cavity 111, so as to avoid the entry of water and dust into the battery pack case 10, and make the battery better perform. Figure 3 As shown in FIG. 1, the fastener 16 passes through the first mounting hole 122, the second mounting hole 142 and the third mounting hole 132 to connect the bottom plate 12, the side frame 14 and the cover plate 13. When the fastener 16 tightly connects the bottom plate 12, the side frame 14 and the cover plate 13 together, they can form a containing cavity 111, so as to avoid the entry of water and dust into the battery pack case 10, and make the battery better perform.

[0065] Optionally, the battery pack further comprises a fan 17, the fan 17 is located outside the battery pack box 10, the fan 17 is arranged opposite to the pipe opening of the heat dissipation pipe 11, and the fan 17 is fixedly connected with the cover plate 13 or the bottom plate 12.

[0066] As shown in Figure 1 and Figure 3 , the battery pack further comprises a fan 17, the fan 17 is located outside the battery pack box 10, the fan 17 is arranged opposite to the pipe opening of the heat dissipation pipe 11, and the fan 17 is fixedly connected with the cover plate 13 or the bottom plate 12.

[0067] In the embodiment of the present application, when the fan 17 cannot be conveniently installed on the battery pack box 10, the natural ventilation mode can be used to dissipate heat of the battery, the pipe opening of the heat dissipation pipe 11 is directed to the blowing direction, and the heat dissipation of the battery can be realized when the natural wind blows through the heat dissipation pipe 11. When the fan 17 is installed on the battery pack box 10, the fan 17 is directed to the pipe opening of the heat dissipation pipe 11, and the fan 17 can directly blow the heat dissipation pipe 11. The fan 17 can be installed at the bottom plate 12 and blows from one side of the bottom plate 12, so that the heat is dissipated from one side of the cover plate 13. Similarly, the fan 17 can also be installed at the cover plate 13 and blows from one side of the cover plate 13, so that the heat is dissipated from one side of the bottom plate 12. The connection mode of the fan 17 and the cover plate 13 or the bottom plate 12 is fixed connection, and the connection mode is also detachable connection, which is usually bolt connection, so that the connection is firm and the disassembly is convenient.

[0068] Optionally, the battery pack further comprises a control circuit board 18, a plurality of temperature sensors 212 are further arranged on the battery unit 20, the control circuit board 18 is fixed in the battery pack box 10, the temperature sensor 212 is connected with the battery unit 20 and the control circuit board 18, and the control circuit board 18 is electrically connected with the fan 17.

[0069] As shown in Figure 1 and Figure 3As shown, the battery pack further comprises a control circuit board 18 fixedly arranged in the battery pack box 10, the control circuit board 18 is electrically connected with the fan 17, and a temperature sensor 212 is further arranged on the battery cell 20, the temperature sensor 212 is connected with the battery cell 20 and the control circuit board 18. The temperature sensor 212 can detect the temperature of the battery cell 20, and can feed back the detected temperature information to the control circuit board 18, and the control circuit board 18 controls the rotation of the fan 17 according to the collected temperature information of the battery cell 20, blows the battery cell 21 inside in time, keeps the temperature of the battery cell 21 appropriate, and improves the performance of the battery cell 21.

[0070] In the embodiment of the application, the control circuit board 18 and the fan 17 are connected through a stress relaxation wire harness, and the use of the wire harness can prevent the core wire from breaking at the wire connection, and enhance the durability and reliability of the wire. The control circuit board 18 further comprises a wire harness connected with the outside world, and the wire harness port is left on the side frame 14, the wire harness extends from the wire harness port of the side frame 14, and the wire harness port is also sealed by glue injection. In addition, the control circuit board 18 can independently control the rotation of the single fan 17, and the temperature sensor 212 is installed on the battery cell 20, the control circuit board 18 is connected with the temperature sensor 212, and according to the temperature feedback of the temperature sensor 212, the control circuit board 18 can independently control the rotation of the single fan 17, thereby cooling the battery cell 21 and reducing the temperature difference between different battery cells 21, thereby improving the performance of the whole battery and prolonging the service life of the whole battery.

[0071] Optionally, the fan 17 is provided with a first connecting portion 171, the control circuit board 18 is provided with a second connecting portion 181, the cover plate 13 is provided with a fourth through hole 133, and the first connecting portion 171 passes through the fourth through hole 133 and is electrically connected with the second connecting portion 181.

[0072] As shown in Figure 1 and Figure 3 The fan 17 is provided with a first connecting portion 171, the control circuit board 18 is provided with a second connecting portion 181, the cover plate 13 is provided with a fourth through hole 133, and the first connecting portion 171 passes through the fourth through hole 133 and is electrically connected with the second connecting portion 181. Through the connection of the first connecting portion 171 and the second connecting portion 181, the control circuit board 18 and the fan 17 are electrically connected, so that the control circuit board 18 can control the fan 17, and the above design can also reasonably utilize the space of the battery pack box 10, so that the battery pack box 10 realizes more reasonable layout.

[0073] In the embodiments of the application, the first connecting part 171 and the second connecting part 181 can be in the form of a plug or a socket. When the first connecting part 171 is in the form of a plug, the second connecting part 181 is in the form of a socket. When the second connecting part 181 is in the form of a plug, the first connecting part 171 is in the form of a socket. A foam pad can be arranged at the positions of the first connecting part 171 and the second connecting part 181. On the one hand, the foam pad has a damping effect, which can avoid damage to the connecting part. On the other hand, the foam pad can also have a sealing effect, so that the connecting part can better achieve waterproofing.

[0074] Optionally, the first connecting part 171 is sealingly connected with the third mounting hole 132.

[0075] As shown in FIGS. 1, 2 and 3, the first connecting part 171 is arranged on the first side wall 110 of the battery pack box body 10, and the second connecting part 181 is arranged on the second side wall 120 of the battery pack box body 10. The first connecting part 171 and the second connecting part 181 are arranged on the same side of the battery pack box body 10. Figure 1 and As shown in FIGS. 1, 2 and 3, the first connecting part 171 is arranged on the first side wall 110 of the battery pack box body 10, and the second connecting part 181 is arranged on the second side wall 120 of the battery pack box body 10. The first connecting part 171 and the second connecting part 181 are arranged on the same side of the battery pack box body 10. Figure 3 As shown in FIGS. 1, 2 and 3, the first connecting part 171 is arranged on the first side wall 110 of the battery pack box body 10, and the second connecting part 181 is arranged on the second side wall 120 of the battery pack box body 10. The first connecting part 171 and the second connecting part 181 are arranged on the same side of the battery pack box body 10.

[0076] The application further provides a power utilization device comprising the battery pack of any one of the above. It should be noted that, through uniform ventilation and heat dissipation of the heat dissipation pipe 11, the temperature of the battery pack can be stably maintained at an appropriate level, so that the battery pack can better perform charging and discharging.

[0077] Finally, it should be noted that, in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "includes" does not, without more constraints, preclude the existence of additional identical elements other than the listed elements.

Claims

1. A battery pack, characterized in that, the battery pack comprises a battery pack box (10) and a battery cell (20), the battery cell (20) is located in the battery pack box (10); a plurality of heat dissipation pipes (11) are uniformly arranged in the battery pack box (10), the battery cell (20) is provided with a first through hole (211), and the heat dissipation pipe (11) passes through the first through hole (211); the heat dissipation pipe (11) communicates with the external environment of the battery pack box (10).

2. The battery pack of claim 1, characterized in that, the battery cell (20) comprises a plurality of battery cells (21), and at least three battery cells (21) enclose a first through hole (211) along the radial direction of the battery cell (21).

3. The battery pack of claim 1, characterized in that, the battery pack box (10) comprises a bottom plate (12), a cover plate (13) and a side frame (14), one end of the side frame (14) is fixedly connected with the bottom plate (12), the other end of the side frame (14) is fixedly connected with the cover plate (13), and thus a containing cavity (111) is formed; a plurality of second through holes (121) are arranged on the bottom plate (12), and a plurality of third through holes (131) are arranged on the cover plate (13); both ends of the heat dissipation pipe (11) are sealingly connected with the second through hole (121) and the third through hole (131).

4. The battery pack of claim 3, characterized in that, the battery pack box (10) further comprises a sealing member (15); the sealing member (15) is laid on the first end surface (14a) and / or the second end surface (14b) of the side frame (14), the first end surface (14a) is an end surface away from the bottom plate (12), and the second end surface (14b) is an end surface close to the bottom plate (12).

5. The battery pack of claim 4, characterized in that, a groove (141) is further arranged on the first end surface (14a) and / or the second end surface (14b) of the side frame (14), and the sealing member (15) is embedded in the groove (141).

6. The battery pack of claim 5, characterized in that, the battery pack box (10) further comprises a fastener (16), the bottom plate (12) is provided with a first mounting hole (122), the side frame (14) is provided with a second mounting hole (142), and the cover plate (13) is provided with a third mounting hole (132); the fastener (16) passes through the first mounting hole (122), the second mounting hole (142) and the third mounting hole (132) to connect the bottom plate (12), the side frame (14) and the cover plate (13).

7. The battery pack of claim 6, characterized in that, the fastener (16) is sealingly connected with the first mounting hole (122) and the third mounting hole (132).

8. The battery pack of claim 7, characterized in that, In an axial direction of the second mounting hole (142), a projection of the second mounting hole (142) is located outside a projection of the groove (141). 9.The battery pack of claim 6, wherein, The battery pack further comprises a fan (17) located outside the battery pack case (10), the fan (17) is arranged opposite to the pipe opening of the heat dissipation pipe (11), and the fan (17) is fixedly connected with the cover plate (13) or the bottom plate (12). 10.The battery pack of claim 9, wherein, The battery pack further comprises a control circuit board (18), and a temperature sensor (212) is further arranged on the battery cell (20), and the control circuit board (18) is fixed in the battery pack case (10) ; The temperature sensor (212) is connected with the battery cell (20) and the control circuit board (18), and the control circuit board (18) is further electrically connected with the fan (17). 11.The battery pack of claim 10, wherein, A first connecting part (171) is arranged on the fan (17), a second connecting part (181) is arranged on the control circuit board (18), and a fourth through hole (133) is arranged on the cover plate (13), and the first connecting part (171) passes through the fourth through hole (133) and is electrically connected with the second connecting part (181). 12.The battery pack of claim 11, wherein, The first connecting part (171) is sealingly connected with the third mounting hole (132).

13. An electrical device, comprising: The power consumption device comprises the battery pack of any one of claims 1-12.

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