Mobile power supply

Abstract

The utility model discloses a mobile power supply. The mobile power supply comprises a circuit board, a cell assembly and a fan assembly. The cell assembly and the circuit board are arranged at intervals in the first direction, and an interlayer space is formed between the cell assembly and the circuit board. The fan assembly is arranged in the interlayer space. Wherein on a reference plane perpendicular to the first direction, at least part of the projection of the fan assembly is located in the projection of the circuit board and the cell assembly; and the fan assembly is used for simultaneously cooling the circuit board and the battery core assembly. In this way, the heat dissipation and cooling effect of the mobile power supply can be improved.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a mobile power source. Background Art

[0002] In life, people often need to use various electronic products, many of which need to be charged frequently, and mobile power supplies have emerged. Mobile power supplies are easy to carry, making it easy to charge electronic products.

[0003] When the mobile power source is working, heat is generated, and the heat accumulation is not conducive to the mobile power source maintaining a normal working state. In the current technology, there is a lack of structural functional design for heat dissipation and cooling of the mobile power source. Utility Model Content

[0004] The main technical problem solved by the present application is to provide a mobile power supply, which can improve the heat dissipation and cooling effect of the mobile power supply.

[0005] In order to solve the above technical problems, the technical solution adopted in the present application is: providing a mobile power supply, the mobile power supply comprising a circuit board, a battery cell assembly and a fan assembly. The battery cell assembly and the circuit board are arranged at intervals along a first direction and a sandwich space is formed between the two. The fan assembly is arranged in the sandwich space. Among them, on a reference plane perpendicular to the first direction, at least part of the projection of the fan assembly is located within the projection of the circuit board and the battery cell assembly; the fan assembly is used to dissipate heat for the circuit board and the battery cell assembly at the same time.

[0006] The beneficial effects of the present application are as follows: different from the prior art, the battery cell assembly and the circuit board are spaced apart along a first direction and a mezzanine space is formed therebetween, and the fan assembly is arranged in the mezzanine space, wherein, on a reference plane perpendicular to the first direction, at least part of the projection of the fan assembly is located within the projection of the circuit board and the battery cell assembly, and the fan assembly is used to dissipate heat to the circuit board and the battery cell assembly at the same time, thereby increasing the airflow speed in the mezzanine space, increasing the airflow exchange efficiency between the mobile power supply and the outside world, and increasing the heat dissipation and cooling effect of the mobile power supply, while making the structure of the mobile power supply more compact, which is beneficial to increasing the volume energy density of the mobile power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of a mobile power supply of the present application;

[0008] Figure 2 This is a schematic cross-sectional structure diagram of an embodiment of a mobile power supply of the present application;

[0009] Figure 3 This is a schematic diagram of the structure of the mobile power supply embodiment of the present application with some parts hidden;

[0010] Figure 4This is a structural diagram of another embodiment of the mobile power supply of the present application with some parts hidden;

[0011] Figure 5 A schematic diagram of the connection structure of the circuit board and the electrical connection board assembly;

[0012] Figure 6 for Figure 5 Right side view of the structure shown. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0014] After long-term research, the inventors found that when a mobile power source is working, heat is generated, and heat accumulation is not conducive to the mobile power source maintaining a normal working state. In the current technology, there is a lack of structural functional design for heat dissipation and cooling of the mobile power source. In order to solve this technical problem, the present application provides the following embodiments.

[0015] like Figure 1 and Figure 2 As shown, the mobile power supply 1 described in the mobile power supply embodiment of the present application includes a circuit board 100, a battery cell assembly 200 and a fan assembly 300. The battery cell assembly 200 and the circuit board 100 are arranged at intervals along the first direction D1 and a sandwich space 201 is formed between the two. The fan assembly 300 is arranged in the sandwich space 201. Among them, on the reference plane perpendicular to the first direction D1, at least part of the projection of the fan assembly 300 is located in the projection of the circuit board 100 and the battery cell assembly 200. That is to say, on the reference plane perpendicular to the first direction D1, at least part of the projection of the fan assembly 300 is located in the projection of the circuit board 100 and the projection of the battery cell assembly 200. The fan assembly 300 is used to dissipate heat for the circuit board 100 and the battery cell assembly 200 at the same time. That is to say, at least part of the projection of the fan assembly 300 on the reference plane perpendicular to the first direction D1 is located in the projection of the circuit board 100 and the battery cell assembly 200 on the reference plane. The fan assembly 300 is used to form an airflow flowing through the interlayer space 201 to cool the circuit board 100 and the battery cell assembly 200 simultaneously.

[0016] The mobile power source 1 may be a power bank. The side of the circuit board 100 facing the battery cell assembly 200 may be provided with circuits and various devices 101 to realize functions such as current conversion, circuit control, and circuit protection. The battery cell assembly 200 may be used to store energy. Both the battery cell assembly 200 and the circuit board 100 generate heat when working, and the accumulation of heat is not conducive to the normal operation of the battery cell assembly 200 and the circuit board 100.

[0017] The fan assembly 300 can be used to promote heat dissipation of the battery cell assembly 200 and the circuit board 100. By arranging the fan assembly 300 so that at least part of the projection on the reference plane perpendicular to the first direction D1 is located within the projection of the circuit board 100 and the battery cell assembly 200 on the reference plane, it is helpful to increase the airflow speed in the interlayer space 201, improve the airflow exchange efficiency between the mobile power supply 1 and the outside world, improve the heat dissipation and cooling effect, and at the same time make the structure of the mobile power supply 1 more compact, which is helpful to improve the volume energy density of the mobile power supply 1. By improving the heat dissipation and cooling effect, it is helpful for the mobile power supply 1 to achieve no derating throughout the whole process or extend the high power output time, reduce the heat accumulation speed inside the mobile power supply 1, and thus reduce the probability of local hot spots and high temperature derating.

[0018] Alternatively, if Figure 1 and Figure 2 As shown, the two main surfaces of the fan assembly 300 are respectively arranged to be opposite to the circuit board 100 and the battery core assembly 200, so that the size of the fan assembly 300 along the first direction D1 can be reduced, thereby facilitating the reduction of the size of the mobile power supply 1 along the first direction D1.

[0019] The battery cell assembly 200 and the circuit board 100 are arranged at intervals along the first direction D1 and an interlayer space 201 is formed therebetween. The fan assembly 300 is arranged in the interlayer space 201. On a reference plane perpendicular to the first direction D1, at least a portion of the projection of the fan assembly 300 is located within the projections of the circuit board 100 and the battery cell assembly 200. The fan assembly 300 is used to form an airflow flowing through the interlayer space 201 for simultaneously cooling the circuit board 100 and the battery cell assembly 200, thereby increasing the airflow velocity in the interlayer space 201, increasing the airflow exchange efficiency between the mobile power supply 1 and the outside world, and increasing the heat dissipation and cooling effect of the mobile power supply 1. At the same time, the structure of the mobile power supply 1 can be made more compact, which is beneficial to increasing the volume energy density of the mobile power supply 1.

[0020] Alternatively, if Figures 1 to 3As shown, the circuit board 100 extends along the second direction D2. The first direction D1 intersects with the second direction D2. The side of the battery cell assembly 200 facing the circuit board 100 has a first area 211 and a second area 221 exposed relative to the interlayer space 201, and the first area 211 and the second area 221 are arranged along the second direction D2. The interlayer space 201 includes a first subspace 202 and a second subspace 203 that are connected. The first subspace 202 is formed between the first area 211 and the circuit board 100, and the second subspace 203 is formed between the second area 221 and the circuit board 100. The fan assembly 300 is disposed in the first subspace 202 or the second subspace 203, and the fan assembly 300 is used to form an airflow flowing through the first subspace 202 and the second subspace 203, so as to cool the circuit board 100, the first area 211 and the second area 221 at the same time.

[0021] This helps to dissipate heat more evenly from the battery cell assembly 200 and improves the heat dissipation and cooling effect.

[0022] Alternatively, if Figures 1 to 3 As shown, the battery cell assembly 200 includes a first battery group 210 and a second battery group 220 arranged along the second direction D2. The first battery group 210 and the second battery group 220 are respectively arranged along the first direction D1 and spaced from the circuit board 100. The first area 211 is located on the first battery group 210, and the second area 221 is located on the second battery group 220.

[0023] Specifically, the circuit board 100 extends along the second direction D2. The first direction D1 intersects with the second direction D2. The battery cell assembly 200 includes a first battery group 210 and a second battery group 220 arranged along the second direction D2. The first battery group 210 and the second battery group 220 are respectively arranged spaced apart from the circuit board 100 along the first direction D1. The interlayer space 201 includes a first subspace 202 and a second subspace 203 that are connected. The first subspace 202 is formed between the first battery group 210 and the circuit board 100, and the second subspace 203 is formed between the second battery group 220 and the circuit board 100. The fan assembly 300 is arranged in the first subspace 202 or the second subspace 203, and the fan assembly 300 is used to form an airflow flowing through the first subspace 202 and the second subspace 203, so as to cool the circuit board 100, the first battery group 210 and the second battery group 220 at the same time.

[0024] The first battery group 210 and the second battery group 220 may each include at least one battery cell, where the battery cell is the smallest energy storage unit inside the battery cell assembly 200 .

[0025] By separately arranging the first battery pack 210 and the second battery pack 220, the structure of the battery cell assembly 200 can be made more flexible, thereby making the shape of the battery cell assembly 200 more compatible with the shape of the circuit board 100. By arranging the first subspace 202 and the second subspace 203, when the airflow flows through the first subspace 202, it can promote the heat dissipation of the first battery pack 210 and the part of the circuit board 100 that is opposite to the first battery pack 210, and when the airflow flows through the second subspace 203, it can promote the heat dissipation of the second battery pack 220 and the part of the circuit board 100 that is opposite to the second battery pack 220, so that the airflow path can fully cover the first battery pack 210 and the second battery pack 220, thereby improving the heat dissipation and cooling effect.

[0026] Alternatively, if Figures 1 to 3 As shown, the mobile power supply 1 further includes an electrical connection board assembly 400, the circuit board 100 is connected to a first end of the electrical connection board assembly 400, and a second end of the electrical connection board assembly 400 is electrically connected to the first battery pack 210 and the second battery pack 220. The first subspace 202 and the second subspace 203 are respectively formed on both sides of the electrical connection board assembly 400, and the electrical connection board assembly 400 is provided with a flow passage 411 between the first end and the second end thereof, and the first subspace 202 and the second subspace 203 are connected in the second direction D2 through the flow passage 411.

[0027] Specifically, the electrical connection board assembly 400 can play the role of conducting the circuit, and the circuit board 100 is electrically connected to the cells in the first battery pack 210 and the second battery pack 220 through the electrical connection board assembly 400. Furthermore, the electrical connection board assembly 400 can be provided with a protection circuit, a balancing circuit, etc. to adjust the working state of the first battery pack 210 and the second battery pack 220.

[0028] The flow passage 411 may be located between the first subspace 202 and the second subspace 203, and the first subspace 202 and the second subspace 203 may be opposite to each other through the flow passage 411. By providing the flow passage 411, the airflow velocity in the first subspace 202 and the second subspace 203 may be increased, and the airflow exchange efficiency between the mobile power supply 1 and the outside world may be increased. The flow passage 411 is provided on the electrical connection board assembly 400, which is easy to process and shape, and is conducive to improving assembly efficiency.

[0029] Alternatively, if Figures 1 to 3As shown, the first battery pack 210 and the second battery pack 220 are arranged at intervals, and the electrical connection plate assembly 400 is between the first battery pack 210 and the second battery pack 220. The electrical connection plate assembly 400 includes a first electrical connection plate 410 and a second electrical connection plate 420 that are electrically connected. The first electrical connection plate 410 is arranged opposite to and electrically connected to the first battery pack 210, and the first electrical connection plate 410 also extends into the interlayer space 201 and is electrically connected to the circuit board 100. The second electrical connection plate 420 is arranged opposite to and electrically connected to the second battery pack 220. The first subspace 202 and the second subspace 203 are respectively formed on both sides of the first electrical connection plate 410, and the flow passage 411 is opened on the first electrical connection plate 410.

[0030] Specifically, the first electrical connection plate 410 can be respectively opposite to and electrically connected to one end of the battery cell setting electrode of the first battery group 210, and the second electrical connection plate 420 can be respectively opposite to and electrically connected to one end of the battery cell setting electrode of the second battery group 220. The first electrical connection plate 410 and the second electrical connection plate 420 are opposite to and electrically connected.

[0031] By providing the first electrical connection plate 410 and the second electrical connection plate 420, the cells in the first battery pack 210 and the second battery pack 220 can be directly electrically connected to the electrical connection plate assembly 400, which is beneficial to improving the stability of the circuit structure. The flow channel 411 is opened on the first electrical connection plate 410, which is easy to process and shape, and is beneficial to improving assembly efficiency.

[0032] Furthermore, if Figures 1 to 3 As shown, in the first direction D1 , the size of the first electrical connection plate 410 is larger than the size of the second electrical connection plate 420 , and the second electrical connection plate 420 can avoid the interlayer space 201 .

[0033] Alternatively, if Figures 3 to 5 As shown, the first electrical connection board 410 includes a board body 414, an extension 412, and a leg 413 connected in sequence, the board body 414 is opposite to and electrically connected to the second electrical connection board 420, the extension 412 is provided with a flow passage 411, and the leg 413 is inserted into the circuit board 100 to be electrically connected to the circuit board 100. Further, the first electrical connection board 410 supports the circuit board 100.

[0034] Alternatively, if Figure 5 and Figure 6 As shown, the size L1 of the flow channel 411 in the first direction D1 ranges from 2 to 10 mm. For example, the size L1 of the flow channel 411 in the first direction D1 is 3 mm, 4 mm, 5 mm, 6 mm or 8 mm.

[0035] Such an arrangement can ensure sufficient airflow between the first subspace 202 and the second subspace 203 , while keeping the volume of the mobile power supply 1 small.

[0036] Alternatively, if Figures 2 to 5 As shown, the mobile power supply 1 includes a support member 600, the support member 600 is provided with a receiving groove 610, the battery cell assembly 200, the second electrical connection plate 420 and the board main body 414 are arranged in the receiving groove 610, the bottom wall of the receiving groove 610 is blocked between the board main body 414 and the circuit board 100, and the bottom wall of the receiving groove 610 is provided with an avoidance hole 613, and the extension portion 412 is passed through the avoidance hole 613.

[0037] Alternatively, if Figures 2 to 4 As shown, the mobile power supply further includes a support member 600, and the support member 600 is disposed on the first battery pack 210 and the second battery pack 220. In the first direction D1, the portion of the support member 600 disposed on the second battery pack 220 is sunken compared to the portion of the support member 600 disposed on the first battery pack 210 to form a recessed portion 221, and the fan assembly 300 is disposed in the recessed portion 221.

[0038] Accordingly, the side of the second battery pack 220 facing the circuit board 100 is sunken compared to the side of the first battery pack 210 facing the circuit board 100 .

[0039] In this way, the fan assembly 300 can overlap with the first battery pack 210 along the first direction D1 , which is beneficial to reducing the size of the mobile power supply 1 along the first direction D1 , so that the mobile power supply 1 maintains a relatively small volume.

[0040] Further, the fan assembly 300 may be disposed on a side of the second battery pack 220 facing the circuit board 100 .

[0041] Alternatively, if Figure 3 As shown, the number of devices 101 in the portion of the circuit board 100 opposite to the first battery pack 210 is lower than the number of devices 101 in the portion opposite to the second battery pack 220 .

[0042] The heat generated by the devices 101 is concentrated, and such an arrangement can make the fan assembly 300 closer to the part of the circuit board 100 where there are more devices 101, thereby improving the heat dissipation and cooling effect.

[0043] Alternatively, if Figure 2 As shown, the size L2 of the first subspace 202 in the first direction D1 ranges from 2 to 15 mm. For example, the size L2 of the first subspace 202 in the first direction D1 is 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm or 14 mm.

[0044] Such an arrangement can not only reduce the heat interference between the circuit board 100 and the battery cell assembly 200 and promote heat dissipation and cooling, but also keep the mobile power supply 1 in a relatively small size.

[0045] Further, in the first direction D1 , a size L2 of the first subspace 202 is smaller than a size of the second subspace 203 .

[0046] Alternatively, if Figures 2 to 4 As shown, the mobile power supply 1 further includes a housing 500 and a support member 600. The housing 500 is provided with a receiving chamber 501, and the circuit board 100, the battery cell assembly 200, the fan assembly 300 and the support member 600 are received in the receiving chamber 501. The housing 500 includes a bottom wall portion 510, and the support member 600 abuts between the circuit board 100 and the bottom wall portion 510. The support member 600 is provided with a receiving groove 610 opening toward the bottom wall portion 510, and the first battery pack 210 and the second battery pack 220 are received in the receiving groove 610. The bottom wall of the receiving groove 610 is provided with a first opening 611 and a second opening 612, and the first battery pack 210 is exposed to the first sub-space 202 through the first opening 611, and the second battery pack 220 is exposed to the second sub-space 203 through the second opening 612.

[0047] By providing the support member 600, the first battery pack 210 and the second battery pack 220 can be positioned, and the circuit board 100 can also be positioned, which can improve the structural stability inside the mobile power supply 1. Specifically, the support member 600 can cover the first battery pack 210 and the second battery pack 220, so that the first battery pack 210 and the second battery pack 220 are confined in the receiving groove 610.

[0048] The circuit board 100 is restricted to the side of the support member 600 away from the receiving groove 610. Optionally, the side of the support member 600 away from the receiving groove 610 is provided with a support portion 601 and a buckle portion 602, and the circuit board 100 is fixed between the support portion 601 and the buckle portion 602 along the first direction D1. Further, the circuit board 100 can be fixed to the support portion 601 by a threaded fastener.

[0049] The first opening 611 is exposed to the first sub-space 202 and the second opening 612 is exposed to the second sub-space 203 , which is beneficial for heat dissipation of the first battery pack 210 and the second battery pack 220 .

[0050] Alternatively, if Figure 2 As shown, the fan assembly 300 is mounted on a support member 600 .

[0051] Alternatively, if Figure 2 As shown, the housing 500 includes a bottom wall portion 510 and a side wall portion 520 that are integrally formed and connected.

[0052] Alternatively, if Figure 1 and Figure 2 As shown, the mobile power supply 1 further includes a cover 530 and an upper shell 540, the shell 500 has an opening connected to the accommodating cavity 501, the upper shell 540 is covered on the opening to close the accommodating cavity 501, and the cover 530 covers the side of the upper shell 540 away from the shell 500 to make the surface of the mobile power supply 1 smooth. The circuit board 100 is limited between the upper shell 540 and the support 600.

[0053] Alternatively, if Figure 2 and Figure 4 As shown, the mobile power supply 1 further includes a housing 500, the housing 500 is provided with a housing cavity 501, the circuit board 100, the battery cell assembly 200 and the fan assembly 300 are accommodated in the housing cavity 501, and the housing 500 is provided with an air inlet 502 and an air outlet 503 communicating with the interlayer space 201. The air inlet 502 and the air outlet 503 are respectively arranged on opposite sides of the housing 500, and the air inlet 502 and the air outlet 503 are staggered, or the air inlet 502 and the air outlet 503 are arranged at intervals on the same side of the housing 500.

[0054] Furthermore, the air inlet 502 and the air outlet 503 are respectively disposed close to two ends of the housing 500 to increase the spacing distance between the air inlet 502 and the air outlet 503 .

[0055] The interlayer space 201 can exchange airflow with the outside through the air inlet 502 and the air outlet 503, thereby achieving heat dissipation and cooling of the circuit board 100 and the battery cell assembly 200. By arranging the air inlet 502 and the air outlet 503 at both ends of the housing 500 and staggering them, it is beneficial for the airflow path to cover more areas in the interlayer space 201, thereby improving the heat dissipation and cooling effect.

[0056] Optionally, the air inlet 502 is grid-shaped.

[0057] Furthermore, the air inlet 502 and the air outlet 503 are respectively disposed at two ends of the housing 500 along the second direction D2.

[0058] Furthermore, the air inlet 502 is connected to the first subspace 202, the air outlet 503 is connected to the second subspace 203, and the fan assembly 300 is arranged in the second subspace 203. When the fan assembly 300 is working, the airflow can enter the first subspace 202 from the air inlet 502, then enter the second subspace 203 from the flow channel 411, and then flow out to the outside from the air outlet 503.

[0059] Alternatively, if Figure 2 and Figure 4As shown, the fan assembly 300 has an air inlet 301 and an air outlet 302, and the air inlet 301 is arranged to face the circuit board 100 or the battery cell assembly 200. The housing 500 includes a side wall portion 520, and the side wall portion 520 is used to enclose the sandwich space 201 with the circuit board 100 and the battery cell assembly 200. The air inlet 502 and the air outlet 503 are respectively arranged on opposite sides of the side wall portion 520, and the air inlet 502 and the air outlet 503 are staggered, or the air inlet 502 and the air outlet 503 are arranged at intervals on the same side of the side wall portion 520. The air inlet 502 and the air outlet 503 are arranged to be opposite to the sandwich space 201, respectively, and the air outlet 302 is arranged to be opposite to the air outlet 503.

[0060] Furthermore, the air inlet 502 and the air outlet 503 are respectively disposed close to two ends of the side wall portion 520 to increase the spacing distance between the air inlet 502 and the air outlet 503 .

[0061] The air inlet 301 is arranged to face the circuit board 100 or the battery cell assembly 200, which is conducive to improving the heat dissipation effect. The air inlet 502 and the air outlet 503 are arranged to be opposite to the interlayer space 201, and the air outlet 302 is arranged to be opposite to the air outlet 503, which is conducive to increasing the air flow rate in the interlayer space 201 and promoting heat dissipation.

[0062] Alternatively, if Figure 2 and Figure 4 As shown, the side wall portion 520 has two first side walls 521 and two second side walls 522, the first side walls 521 and the second side walls 522 are alternately connected to form a cylindrical shape, the two first side walls 521 are arranged opposite to each other, the two first side walls 521 are arranged to be opposite to each other and extend along the second direction D2, the air inlet 502 and the air outlet 503 are respectively arranged on the two first side walls 521, or the air inlet 502 and the air outlet 503 are arranged at intervals on one first side wall 521.

[0063] Optionally, the air inlet 301 is disposed on a main surface of the fan assembly 300 to obtain a larger air inlet area.

[0064] In some embodiments, the fan assembly 300 has two air inlets 301 , and the two air inlets 301 are arranged to face the circuit board 100 and the battery cell assembly 200 respectively.

[0065] Furthermore, the air inlet 502 is connected to the first subspace 202, the air outlet 503 is connected to the second subspace 203, and the fan assembly 300 is arranged in the second subspace 203. When the fan assembly 300 is working, the airflow can enter the first subspace 202 from the air inlet 502, then enter the second subspace 203 from the flow channel 411, then enter the air inlet 301, flow out from the air outlet 302, and finally flow out to the outside from the air outlet 503.

[0066] In summary, this embodiment can improve the air flow speed in the interlayer space 201, improve the air flow exchange efficiency between the mobile power supply 1 and the outside world, improve the heat dissipation and cooling effect, and at the same time make the structure of the mobile power supply 1 more compact, which is conducive to improving the volume energy density of the mobile power supply 1.

[0067] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A mobile power source, characterized in that: include: Circuit boards; A battery cell assembly, wherein the battery cell assembly and the circuit board are spaced apart along a first direction and an interlayer space is formed therebetween; A fan assembly is arranged in the interlayer space; wherein, on a reference plane perpendicular to the first direction, at least a portion of the projection of the fan assembly is located within the projections of the circuit board and the battery cell assembly; the fan assembly is used to dissipate heat for the circuit board and the battery cell assembly at the same time.

2. The mobile power source according to claim 1, characterized in that: The circuit board extends along a second direction; wherein the first direction intersects with the second direction; The battery cell assembly has a first area and a second area exposed relative to the interlayer space on one side facing the circuit board, and the first area and the second area are arranged along the second direction; the interlayer space includes a first subspace and a second subspace connected to each other, the first subspace is formed between the first area and the circuit board, and the second subspace is formed between the second area and the circuit board; The fan assembly is disposed in the first subspace or the second subspace, and is used to form an airflow flowing through the first subspace and the second subspace, so as to cool the circuit board, the first area, and the second area simultaneously.

3. The mobile power source according to claim 2, characterized in that: The battery cell assembly comprises a first battery group and a second battery group arranged along the second direction; the first battery group and the second battery group are respectively arranged spaced apart from the circuit board along the first direction; the first area is located on the first battery group, and the second area is located on the second battery group; The mobile power supply also includes an electrical connection board assembly, the circuit board is connected to a first end of the electrical connection board assembly, and a second end of the electrical connection board assembly is electrically connected to the first battery pack and the second battery pack; the first subspace and the second subspace are respectively formed on both sides of the electrical connection board assembly, and the electrical connection board assembly has an overcurrent channel between its first end and the second end, and the first subspace and the second subspace are connected in the second direction through the overcurrent channel.

4. The mobile power source according to claim 3, characterized in that: The first battery group and the second battery group are arranged at intervals, and the electrical connection plate assembly is located between the first battery group and the second battery group; the electrical connection plate assembly includes a first electrical connection plate and a second electrical connection plate that are electrically connected; the first electrical connection plate is arranged opposite to and electrically connected to the first battery group, and the first electrical connection plate also extends into the interlayer space and is electrically connected to the circuit board; the second electrical connection plate is arranged opposite to and electrically connected to the second battery group; the first subspace and the second subspace are respectively formed on both sides of the first electrical connection plate, and the current passage is opened on the first electrical connection plate.

5. The mobile power source according to claim 3, characterized in that: The size of the flow channel in the first direction ranges from 2 to 10 mm.

6. The mobile power source according to claim 3, characterized in that: The mobile power supply also includes a support member, which is covered on the first battery pack and the second battery pack; in the first direction, the part of the support member covering the second battery pack is sunken compared to the part of the support member covering the first battery pack to form a recessed portion, and the fan assembly is arranged in the recessed portion.

7. The mobile power source according to claim 6, characterized in that: The mobile power supply also includes a shell, the shell is provided with a accommodating cavity, the circuit board, the battery cell assembly, the fan assembly and the support member are accommodated in the accommodating cavity; the shell includes a bottom wall portion, and the support member abuts between the circuit board and the bottom wall portion; the support member is provided with an accommodating groove opening toward the bottom wall portion, the first battery pack and the second battery pack are accommodated in the accommodating groove; the bottom wall of the accommodating groove is provided with a first opening and a second opening, the first battery pack is exposed to the first subspace through the first opening, and the second battery pack is exposed to the second subspace through the second opening.

8. The mobile power source according to claim 2, characterized in that: The size of the first subspace in the first direction ranges from 2 to 15 mm.

9. The mobile power source according to claim 1, characterized in that: The mobile power supply further comprises a shell, the shell is provided with a receiving cavity, the circuit board, the battery core assembly and the fan assembly are received in the receiving cavity; the shell is provided with an air inlet and an air outlet connected to the interlayer space; The air inlet and the air outlet are respectively arranged on opposite sides of the shell and the air inlet and the air outlet are staggered, or the air inlet and the air outlet are arranged at intervals on the same side of the shell.

10. The mobile power source according to claim 9, characterized in that: The fan assembly has an air inlet and an air outlet, the air inlet is arranged to face the circuit board or the battery cell assembly; the housing includes a side wall portion, the side wall portion is used to enclose the interlayer space with the circuit board and the battery cell assembly; the air inlet and the air outlet are respectively arranged on opposite sides of the side wall portion and the air inlet and the air outlet are staggered, or The air inlet and the air outlet are arranged at the same side of the side wall portion with a spacing therebetween; the air inlet and the air outlet are arranged to be opposite to the interlayer space respectively, and the air outlet is arranged to be opposite to the air outlet.

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