Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of battery packs. The battery pack comprises at least two battery strings, the at least two battery strings are arranged at intervals, and a first gap exists between every two adjacent battery strings; at least part of the flexible cooling plate is arranged in the first gap, the flexible cooling plate abuts against the two adjacent battery strings, and a flow channel cavity is formed in the flexible cooling plate; and the thickness limiting strip is arranged in the first gap, and at least part of the flexible cooling plate is connected between the two adjacent battery strings through the thickness limiting strip. According to the utility model, the cooling effect balance of the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] The battery pack is usually provided with a cooling plate, which is arranged on the side or end surface of the battery pack. The battery pack is cooled by the cooling plate to improve the cooling efficiency of the battery pack.

[0003] The existing flexible liquid cooling plate is arranged between the battery cells. During the grouping process, the gap between the battery cells and the flow channel space inside the flexible liquid cooling plate cannot be guaranteed, which will cause partial blockage of the flow channel and further cause the problem of uneven heat dissipation of the battery cells. Utility Model Content

[0004] The utility model provides a battery pack to solve or at least partially solve the problem of uneven heat dissipation of a flexible cold plate in the prior art.

[0005] In order to solve the above technical problems, the utility model is achieved as follows:

[0006] On the one hand, the utility model provides a battery pack, comprising: at least two battery strings, the at least two battery strings are arranged at intervals, and there is a first gap between two adjacent battery strings; a flexible cooling plate, the flexible cooling plate is at least partially arranged in the first gap and abuts against two adjacent battery strings, and a flow channel cavity is opened in the flexible cooling plate; a thickness limiting strip, the thickness limiting strip is arranged in the first gap, and the flexible cooling plate is connected between two adjacent battery strings through the thickness limiting strip; the thickness limiting strip and the flow channel cavity are arranged at intervals along the first direction.

[0007] Another aspect of the utility model provides an electrical device, comprising the above-mentioned battery pack.

[0008] In the battery pack disclosed in the embodiment of the utility model, the flexible cooling plate is at least partially disposed in the first gap between two adjacent battery strings, and the thickness limiting strip is also disposed in the first gap. The flexible cooling plate is connected between two adjacent battery strings through the thickness limiting strip, so that the flexible cooling plate abuts against the two adjacent battery strings, and the two adjacent battery strings are cooled by the flexible cooling plate. Furthermore, the thickness limiting strip abuts against the battery string, so that there is a corresponding space between the flexible cooling plate and the adjacent battery string, thereby avoiding blockage of the flow channel cavity, thereby improving the cooling balance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 An exploded view of a battery pack according to an embodiment of the present invention is shown;

[0010] Figure 2The structure diagram of the flexible cooling plate in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0011] Figure 3 The cross section of the flexible cooling plate in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0012] Figure 4 The cross section of the flexible cooling plate in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0013] Figure 5 A cross-sectional view showing the flexible cooling plate in an embodiment of the present invention without or with cooling liquid;

[0014] Figure 6 A cross-sectional view showing the flexible cooling plate in the embodiment of the utility model loaded with cooling liquid;

[0015] Figure 7 The structure diagram of the flexible cooling plate in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 8 The assembly cross section of the flexible cooling plate in the embodiment of the utility model is shown Figure 1 ;

[0017] Fig. 9 The structure diagram of the flexible cooling plate in the embodiment of the utility model is shown in FIG. Figure 3 ;

[0018] Fig.10 The assembly cross section of the flexible cooling plate in the embodiment of the utility model is shown Figure 2 ;

[0019] Fig.11 The structure diagram of the flexible cooling plate in the embodiment of the utility model is shown in FIG. Figure 4 ;

[0020] Fig.12 The assembly cross section of the flexible cooling plate in the embodiment of the utility model is shown Figure 3 ;

[0021] Fig.13 The assembly cross section of the flexible cooling plate in the embodiment of the utility model is shown Figure 4 ;

[0022] Fig.14 The assembly cross section of the flexible cooling plate in the embodiment of the utility model is shown Figure 5 ;

[0023] Fig.15 The assembly cross section of the flexible cooling plate in the embodiment of the utility model is shown Figure 6 ;

[0024] Reference numerals:

[0025] 10: flexible cooling plate; 11: first flexible shell; 111: first through hole; 12: second flexible shell; 121: second through hole; 13: flow channel cavity; 131: first opening; 132: second opening; 14: receiving groove; 141: snap-on hole; 15: packaging edge; 16: first end; 17: second end;

[0026] 20: first water spout; 21: second water spout;

[0027] 30: battery string;

[0028] 40: thickness limit strip; 41: first thickness limit strip; 42: second thickness limit strip;

[0029] 50: connecting pipe;

[0030] A: first direction; B: second direction. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the fixed scope of the utility model.

[0032] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0033] The term "parallel" in this application includes not only the absolute parallel situation, but also the generally parallel situation conventionally recognized in engineering, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°; at the same time, "vertical" also includes not only the absolute vertical situation, but also the generally vertical situation conventionally recognized in engineering, such as "vertical" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only the absolute equal situation, but also the generally equal situation conventionally recognized in engineering, that is, there may be a certain error, such as the state where the tolerance range is -1% to 1%.

[0034] Reference Figure 1 , showing an exploded view of the battery pack described in the embodiment of the utility model; referring to Figure 2 , showing the structure of the flexible cooling plate in the embodiment of the utility model Figure 1 ;reference Figure 3 , showing a cross section of the flexible cooling plate in the embodiment of the utility model Figure 1 ;reference Figure 4 , showing a cross section of the flexible cooling plate in the embodiment of the utility model Figure 2 ;reference Figure 5 , showing a cross-sectional view of the flexible cooling plate in the embodiment of the utility model without cooling liquid; referring to Figure 6 , showing a cross-sectional view of the flexible cooling plate in the embodiment of the utility model loaded with coolant; referring to Figure 7 , showing the structure of the flexible cooling plate in the embodiment of the utility model Figure 2 ;reference Figure 8 , showing the assembly cross section of the flexible cooling plate in the embodiment of the utility model Figure 1 ;reference Fig. 9 , showing the structure of the flexible cooling plate in the embodiment of the utility model Figure 3 ;reference Fig.10 , showing the assembly cross section of the flexible cooling plate in the embodiment of the utility model Figure 2 ;reference Fig.11 , showing the structure of the flexible cooling plate in the embodiment of the utility model Figure 4 ;reference Fig.12 , showing the assembly cross section of the flexible cooling plate in the embodiment of the utility model Figure 3 ;reference Fig.13 , showing the assembly cross section of the flexible cooling plate in the embodiment of the utility model Figure 4 ;reference Fig.14 , showing the assembly cross section of the flexible cooling plate in the embodiment of the utility model Figure 5 ;reference Fig.15 , showing the assembly cross section of the flexible cooling plate in the embodiment of the utility model Figure 6 .

[0035] like Figures 1 to 15As shown, an embodiment of the utility model discloses a battery pack, which has a first direction A and a second direction B intersecting each other. In addition, the battery pack includes at least two battery strings 30, and the at least two battery strings 30 are arranged at intervals, and there is a first gap between two adjacent battery strings 30; a flexible cooling plate 10, the flexible cooling plate 10 is at least partially arranged in the first gap, and abuts against the two adjacent battery strings 30, and a flow channel cavity 13 is opened in the flexible cooling plate 10; a thickness limiting strip 40, the thickness limiting strip 40 is arranged in the first gap, and the flexible cooling plate 10 is connected between the two adjacent battery strings 30 through the thickness limiting strip 40; the thickness limiting strip 40 and the flow channel cavity 13 are arranged at intervals along the first direction A.

[0036] The battery pack disclosed in the embodiment of the utility model is used in an electric device. The electric device can be a vehicle, an electronic device, or any other electric device that needs to be powered by a battery pack. In the embodiment of the utility model, there is no restriction on the specific type of the electric device.

[0037] In this embodiment, the first direction A is the height direction of the battery pack, and the second direction B is the length direction of the battery pack.

[0038] In this embodiment, the thickness limiting strip 40 directly contacts the battery string 30 to achieve heat exchange, which can reduce the use of thermal conductive adhesive and reduce costs.

[0039] In this embodiment, the elastic modulus of the thickness limiting strip 40 is greater than the elastic modulus of the flexible cooling plate 10, so that when the battery string 30 expands, the thickness limiting strip 40 can maintain the space of the first gap to a certain extent, so that the flow channel cavity 13 inside the flexible cooling plate 10 is not over-compressed, thereby ensuring the cooling effect of the flexible cooling plate 10 and the cooling balance of the battery pack.

[0040] Specifically, each battery string 30 may include at least two sub-batteries, and at least two sub-batteries are arranged side by side to form a battery string 30. The sub-battery may be a rectangular parallelepiped structure, a cube structure, or a cylindrical structure. In the embodiment of the utility model, there is no limitation on the specific structure of the sub-battery. In actual applications, technicians can select appropriate sub-batteries as needed.

[0041] like Figure 1 , Figures 4 to 6 As shown, the flexible cooling plate 10 in the embodiment of the utility model is at least partially disposed in the first gap between two adjacent battery strings 30, and the thickness limiting strip 40 is also disposed in the first gap. The flexible cooling plate 10 is connected between two adjacent battery strings 30 through the thickness limiting strip 40, so that the flexible cooling plate 10 abuts against the two adjacent battery strings 30 to cool the two adjacent battery strings 30.

[0042] Specifically, during the installation of the battery pack, the flexible cooling plate 10 that is not filled with coolant can be at least partially placed in the first gap between two adjacent battery strings 30. At this time, the flexible cooling plate 40 is in a collapsed state and does not completely abut against the two adjacent battery strings 30. Then, the thickness limiting strip 40 is set in the first gap, and the size of the first gap between the two adjacent battery strings 30 is limited by the thickness limiting strip 40. At the same time, the flexible cooling plate 10 is connected between the two adjacent battery strings 30 through the thickness limiting strip 40 to avoid displacement of the flexible cooling plate 10. Then, the flexible cooling plate 10 is filled with coolant. When the coolant is filled, the flexible cooling plate 10 is in an expanded state, and the flexible cooling plate 10 can abut against the two adjacent battery strings 30 to cool the two adjacent battery strings 30. Specifically, the thickness limiting strip 40 is bonded to the flexible cooling plate 10 and the battery string 30.

[0043] It should be noted that the flexible cooling plate 10 in the embodiment of the utility model has a flexible property and can be bent. Specifically, the shell of the flexible cooling plate 10 can be made of a flexible composite material such as an aluminum-plastic film, or can be made of other materials with flexible properties. In the embodiment of the utility model, there are no excessive restrictions on the specific material of the shell of the flexible cooling plate 10. In actual applications, technicians can select a suitable material as needed.

[0044] In the embodiment of the utility model, the flexible cooling plate 10 includes a first flexible shell 11 and a second flexible shell 12. Due to the material properties of the first flexible shell 11 and the second flexible shell 12, the first flexible shell 11 and the second flexible shell 12 are connected by one of gluing, hot pressing, cold pressing, and one-piece molding, so that the first flexible shell 11 and the second flexible shell 12 are sealed and connected, and a flow channel cavity 13 is formed between the first flexible shell 11 and the second flexible shell 12.

[0045] In the battery pack disclosed in the embodiment of the utility model, the flexible cooling plate 10 is at least partially disposed in the first gap between two adjacent battery strings 30, and the thickness limiting strip 40 is also disposed in the first gap. The flexible cooling plate 10 is connected between two adjacent battery strings 30 through the thickness limiting strip 40, so that the flexible cooling plate 10 abuts against the two adjacent battery strings 30, and the two adjacent battery strings 30 are cooled by the flexible cooling plate 10. Furthermore, the flexible cooling plate 10 has a flexible property and can be bent. The flexible cooling plate 10 can be flexibly installed between the battery strings 30 to cool the battery strings 30. Thereby, the cooling efficiency of the battery pack can be improved and the cooling cost of the battery pack can be reduced.

[0046] Alternatively, if Figure 1 , Figures 7 to 15 As shown, the flexible cooling plate 10 in the embodiment of the present invention is bent and wrapped around the outside of at least one battery string 30 .

[0047] like Figure 1 , Figures 7 to 15 As shown, the flexible cooling plate 10 in the embodiment of the present invention has a flexible characteristic and can be bent. Figure 7 As shown, the flexible cooling plate 10 can be bent once, and the bent flexible cooling plate 10 can be wrapped around three sides of a battery string 30. Thus, the three sides of the battery string 30 can be cooled simultaneously by the flexible cooling plate 10, so as to increase the cooling area of ​​the battery string 30 and improve the cooling efficiency of the battery string 30.

[0048] like Fig. 9 As shown, the flexible cooling plate 10 can also be bent twice, and the portion of the flexible cooling plate 10 that has been bent twice is placed between two adjacent battery strings 30 and wrapped around multiple sides of the two battery strings 30. Thus, multiple sides of the two battery strings 30 can be cooled simultaneously by the flexible cooling plate 10. The cooling area of ​​the battery string 30 is further increased, and the cooling efficiency of the battery string 30 is improved.

[0049] Of course, if Fig.11 As shown, the flexible cooling plate 10 can also be bent three times, or the flexible cooling plate 10 can be bent four times, etc. Here, no further description is given. It should be noted that in the embodiment of the utility model, there is no restriction on the specific number of bending times of the flexible cooling plate 10. In actual applications, technicians can set it as needed.

[0050] Alternatively, if Figure 1 As shown, the thickness direction of the battery pack is the first direction A, and the thickness limiting strips 40 include a plurality of thickness limiting strips 40, which are arranged in the first gap at intervals along the first direction A. The plurality of thickness limiting strips 40 can better limit the space of the first gap, thereby making the connection between the flexible cold plate 10 and the battery string 30 more reliable, and further ensuring the space of the flow channel cavity 13, thereby improving the balance of the cooling effect of the battery pack.

[0051] In some embodiments, a receiving groove 14 is provided on the flexible cooling plate 10 . The receiving groove 14 has an opening facing the adjacent battery string 30 . The thickness limiting strip 40 is at least partially received in the receiving groove 14 and connected to the battery string 30 through the opening.

[0052] In the embodiment of the utility model, the thickness direction of the battery pack is set to the first direction A, and a plurality of thickness limiting strips 40 are arranged at intervals in the first gap between two adjacent battery strings 30 along the first direction A. A receiving groove 14 is provided on the flexible cooling plate 10, and the thickness limiting strip 40 is provided in the receiving groove 14, so that the flexible cooling plate 10 is clamped in the first gap between two adjacent battery strings 30 through the thickness limiting strip 40, and the flexible cooling plate 10 is fixed to prevent the flexible cooling plate 10 from shifting. At the same time, the thickness limiting strip 40 is accommodated in the receiving groove 14, and the flexible cooling plate 10 and the battery string 30 can further limit the thickness limiting strip 40, which can improve the connection reliability between the thickness limiting strip 40 and the flexible cooling plate 10 and the battery string 30.

[0053] In addition, the accommodating grooves 14 in the embodiment of the utility model may also include multiple accommodating grooves 14, and each accommodating groove 14 is correspondingly provided with a thickness limiting strip 40. The flexible cooling plate 10 is fixed between two adjacent battery strings 30 by multiple accommodating grooves 14 and multiple thickness limiting strips 40, thereby further improving the reliability of the installation of the flexible cooling plate 10 and preventing the flexible cooling plate 10 from shifting.

[0054] In the embodiment of the utility model, the flexible cooling plate 10 is provided with a receiving groove 14 on both sides opposite to each other along the second direction B, and the bottom walls of the receiving grooves 14 on both sides of the flexible cooling plate 10 are connected to divide the flow channel cavity 13 into a plurality of sub-flow channels spaced along the first direction A. Specifically, in the present embodiment, a receiving groove 14 is provided on the first flexible shell 11, and a receiving groove 14 is provided on the second flexible shell 12. The two receiving grooves 14 are recessed and connected toward each other, so that the flow channel cavity is divided into a plurality of sub-flow channels. The design of a plurality of sub-flow channels can improve the flow rate of the cooling medium in the flexible cooling plate 10, and each sub-flow channel is redundant with each other. The thickness limiting strip 40 is provided in the receiving groove 14 to further ensure the circulation space of each sub-flow channel. When one of the sub-flow channels is blocked, the other sub-flow channel still has a chance to circulate normally, which can ensure the cooling effect and balance of the flexible cooling plate 10 on the battery string 30.

[0055] Alternatively, if Figure 7 As shown, in some embodiments, the groove wall of the accommodating groove 14 is provided with a snap-in hole, which penetrates the flexible cooling plate along the second direction B, wherein one side of the thickness limiting strip 40 is connected to one battery string 30, and the other side of the thickness limiting strip 40 extends from the snap-in hole and is connected to another adjacent battery string 30, so as to snap the flexible cooling plate 10 between two adjacent battery strings 30. Through the above arrangement, the connection reliability between the flexible cooling plate 10 and the thickness limiting strip 40 can be further improved, and relative displacement between the flexible cooling plate 10 and the thickness limiting strip 40 can be avoided.

[0056] In the embodiment of the utility model, one side of the thickness limiting strip 40 can be fixedly connected to a battery string 30, and the other side of the thickness limiting strip 40 can be detachably connected to another adjacent battery string 30. One side of the thickness limiting strip 40 can also be clamped to a battery string 30, and the other side of the thickness limiting strip 40 can be clamped to another adjacent battery string 30. In the embodiment of the utility model, there is no restriction on the specific connection method between the thickness limiting strip 40 and the battery string 30. In actual applications, technicians can select a suitable connection method as needed.

[0057] Optionally, the first flexible shell 11 and the second flexible shell 12 in the embodiment of the utility model both include a body and a packaging edge 15, the packaging edge 15 is connected to at least one end of the body along the first direction A, and the two packaging edges 15 are sealed and connected so that the two bodies enclose a flow channel cavity 13, wherein one side of the thickness limiting strip 40 is connected to the battery string 30, and the other side is connected to the packaging edge 15, so as to fix the flexible cooling plate 10 between two adjacent battery strings 30. Preferably, both ends of the body along the first direction A are connected to the packaging edge 15, and the packaging edges 15 at both ends are connected to the limited thickness strip 40, so that the flexible cooling plate 10 is clamped as a whole in the battery string 30 and the thickness limiting strip 40 by limiting the thickness on the side of the flexible cooling plate 10, so as to ensure the space of the flow channel cavity 13, so as to improve the cooling effect and cooling balance of the battery pack.

[0058] In some embodiments, the accommodating groove 14 and the packaging edge 15 exist at the same time. At this time, the packaging edge 15 and the accommodating groove 14 are simultaneously connected to the limited thickness strip 40, and each limited thickness strip 40 is arranged at intervals along the first direction A to further limit the position of the flexible cooling plate 10 and the battery string 30, and ensure the space of the flow channel cavity 13.

[0059] In this embodiment, along the first direction A on a plane perpendicular to the first direction A, the orthographic projection of the body and the orthographic projection of the thickness limiting strip 40 at least partially overlap, and along the second direction B on a plane perpendicular to the second direction B, the orthographic projection of the thickness limiting strip 40 and the orthographic projection of the packaging edge 15 at least partially overlap. Thus, the thickness limiting strip 40 can maintain the first gap, so that the flow channel cavity 13 inside the flexible cooling plate 10 has enough space to flow the cooling medium, so as to improve the cooling effect and balance of the battery pack, and the flexible cooling plate 10, the thickness limiting strip 40 and the battery string 30 are sequentially arranged to form a clamp, so as to ensure the connection reliability among the three.

[0060] Alternatively, if Figure 5 and Figure 6As shown, the thickness limiting strip 40 in the embodiment of the utility model includes a first thickness limiting strip 41 and a second thickness limiting strip 42, wherein the first thickness limiting strip 41 and the second thickness limiting strip 42 are relatively spaced apart in the first gap along the second direction B; the first thickness limiting strip 41 is connected to a battery string 30, and the second thickness limiting strip 42 is connected to another adjacent battery string 30, and the flexible cooling plate 10 is fixed between the first thickness limiting strip 41 and the second thickness limiting strip 42, so as to clamp the flexible cooling plate 10 through the limiting strip 40 to improve the connection reliability.

[0061] Exemplarily, the packaging edge 15 disposed on the flexible cooling plate 10 may be connected between the first thickness limiting strip 41 and the second thickness limiting strip 42 .

[0062] In this embodiment, the packaging mark 15 is arranged around the circumference of the main body, and the flexible cooling plate 10 also includes a first water nozzle 20 and a second water nozzle 21. The first water nozzle 20 and the second water nozzle 21 are both connected to the flow channel cavity 13 and are both on the inner circle side of the packaging edge 15, so that the flexible cooling plate 10 can be packaged at one time, reducing the number of steps and reducing costs.

[0063] Alternatively, if Figures 1 to 15 As shown, the flow channel cavity 13 has a first opening 131 and a second opening 132; along the extension direction of the flow channel cavity 13, the flexible cooling plate 10 has a first end 16 and a second end 17 that are away from each other, the flow channel cavity 13 extends from the first end 16 to the second end 17, the first opening 131 is arranged at a position close to the first end 16, and the second opening 132 is arranged at a position close to the second end 17. More specifically, the first opening 131 is a liquid inlet, and the second opening 132 is a liquid outlet.

[0064] The first water nozzle 20 is connected to the first opening 131, and the coolant is injected into the flow channel cavity 13 from the first opening 131 through the first water nozzle 20. The second opening 132 is provided at a position of the flexible cooling plate 10 close to the second end 17. The second water nozzle 21 is connected to the second opening 132, and the coolant in the flow channel cavity 13 is led out through the second water nozzle 21, so that the circulation of the coolant can be realized.

[0065] It should be noted that if Figure 1 As shown, in this embodiment, the second opening 132 of one flexible cooling plate 10 can also be connected to the first opening 131 of another adjacent flexible cooling plate 10 through the connecting pipe 50 to achieve the series connection of multiple flexible cooling plates 10 .

[0066] In other embodiments, the first openings 131 of multiple flexible cooling plates 10 may be connected through a connecting pipe 50 to achieve parallel connection of multiple flexible cooling plates 10 .

[0067] Alternatively, if Figure 6As shown, along the second direction B perpendicular to the first direction A, the size of the flow channel cavity 13 is greater than the size of the packaging edge 15.

[0068] like Figure 6 As shown, when the flow channel cavity 13 is filled with coolant, the thickness of the flow channel cavity 13 is greater than the thickness of the packaging edge 15 along the second direction B. That is, after the flow channel cavity 13 is filled with coolant, the flexible cooling plate 10 can abut against two adjacent battery strings 30, and can cool the two adjacent battery strings 30.

[0069] Alternatively, if Fig.11 As shown, the first flexible shell 11 is provided with a first through hole 111, and the second flexible shell 12 is provided with a second through hole 121. The first through hole 111 and the second through hole 121 are arranged opposite to each other along the second direction B, and the peripheral side of the first through hole 111 is connected to the peripheral side of the second through hole 121 to form a snap-on hole. Specifically, the peripheral side of the first through hole 111 can be connected to the peripheral side of the second through hole 121 by gluing. The peripheral side of the first through hole 111 can be connected to the peripheral side of the second through hole 121 by hot pressing. Of course, in the embodiment of the utility model, there is no limitation on the specific way in which the peripheral side of the first through hole 111 is connected to the peripheral side of the second through hole 121. In actual applications, technicians can make settings as needed.

[0070] Optionally, the first flexible shell 11 and the second flexible shell 12 in the embodiment of the utility model are flexible composite shells. Exemplarily, the first flexible shell 11 and the second flexible shell 12 can be made of aluminum-plastic film. In this embodiment, an insulating structure is provided in the aluminum-plastic film, and an insulating structure can also be provided on the side of the aluminum-plastic film away from the flow channel cavity 13 to ensure the insulation of the first flexible shell 11 and the second flexible shell 12, or the insulation between the flexible cooling plate 10 and the battery string 30.

[0071] Of course, the above are only individual examples of the specific structures of the first flexible shell 11 and the second flexible shell 12 in the embodiment of the utility model, and are not intended to limit the utility model. In practical applications, technicians can also use other high-strength flexible composite materials to prepare the first flexible shell 11 and the second flexible shell 12.

[0072] Furthermore, the first flexible shell 11 and the second flexible shell 12 are flexible shells, and the flow channel cavity 13 is not easily blocked even if the flexible shells are bent 90 degrees.

[0073] In the battery pack disclosed in the embodiment of the utility model, the flexible cooling plate is at least partially disposed in the first gap between two adjacent battery strings, and the thickness limiting strip is also disposed in the first gap. The flexible cooling plate is connected between two adjacent battery strings through the thickness limiting strip, so that the flexible cooling plate abuts against the two adjacent battery strings, and the two adjacent battery strings are cooled by the flexible cooling plate. Furthermore, the flexible cooling plate has flexible characteristics and can be bent. The flexible cooling plate can be flexibly installed between the battery strings to cool the battery strings. Thereby, the cooling efficiency of the battery pack can be improved and the cooling cost of the battery pack can be reduced.

[0074] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0075] Although the optional embodiments of the utility model embodiments have been described, those skilled in the art, once knowing the basic creative concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including optional embodiments and all changes and modifications falling within the scope of the utility model embodiments.

[0076] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0077] The technical solution provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. At the same time, for general technicians in this field, according to the principle and implementation method of the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A battery pack having a first direction (A) and a second direction (B) intersecting each other, characterized in that: The battery pack comprises: At least two battery strings (30), the at least two battery strings (30) being arranged at intervals, and a first gap being present between two adjacent battery strings (30); a flexible cooling plate (10), the flexible cooling plate (10) being at least partially disposed in the first gap and abutting against two adjacent battery strings (30), and a flow channel cavity (13) being provided in the flexible cooling plate (10); A thickness limiting strip (40), wherein the thickness limiting strip (40) is arranged in the first gap, and at least a portion of the flexible cooling plate (10) is connected between two adjacent battery strings (30) through the thickness limiting strip (40); the thickness limiting strip (40) and the flow channel cavity (13) are arranged at intervals along the first direction (A).

2. The battery pack according to claim 1, characterized in that: The flexible cooling plate (10) is bent and wrapped around the outside of at least one of the battery strings (30).

3. The battery pack according to claim 1, characterized in that: The flexible cooling plate (10) is provided with a receiving groove (14), the receiving groove (14) having an opening facing the adjacent battery string (30), the thickness limiting strip (40) being at least partially received in the receiving groove (14) and connected to the battery string (30) via the opening.

4. The battery pack according to claim 3, characterized in that: A snap-in hole is provided on the wall of the receiving groove (14), and the snap-in hole penetrates the flexible cooling plate (10) along the second direction (B), wherein: One side of the thickness limiting strip (40) is connected to one of the battery strings (30), and the other side of the thickness limiting strip (40) extends out from the snap-in hole and is connected to another adjacent battery string (30) so as to fix the flexible cooling plate (10) between the two adjacent battery strings (30).

5. The battery pack according to claim 3, characterized in that: The flexible cooling plate (10) is provided with the accommodating grooves (14) on opposite sides along the second direction (B), and the bottom walls of the accommodating grooves (14) on both sides of the flexible cooling plate (10) are connected to separate the flow channel cavity (13) into a plurality of sub-flow channels spaced apart along the first direction (A).

6. The battery pack according to claim 1, characterized in that: The flexible cooling plate (10) comprises a first flexible shell (11) and a second flexible shell (12), wherein the first flexible shell (11) and the second flexible shell (12) each comprise a body and a packaging edge (15), wherein the packaging edge (15) is connected to at least one end of the body along the first direction (A), and the two packaging edges (15) are sealed and connected so that the two bodies enclose the flow channel cavity (13), wherein: One side of the thickness limiting strip (40) is connected to the battery string (30), and the other side is connected to the packaging edge (15), so as to fix the flexible cooling plate (10) between two adjacent battery strings (30).

7. The battery pack according to claim 6, characterized in that: Along the first direction (A) on a plane perpendicular to the first direction (A), the orthographic projection of the body at least partially overlaps with the orthographic projection of the thickness limiting strip (40); and along the second direction (B) on a plane perpendicular to the second direction (B), the orthographic projection of the thickness limiting strip (40) at least partially overlaps with the orthographic projection of the packaging edge (15).

8. The battery pack according to claim 6, characterized in that: The packaging edge (15) is arranged around the circumference of the main body, and the flexible cooling plate (10) also includes a first water nozzle (20) and a second water nozzle (21), and the first water nozzle (20) and the second water nozzle (21) are both connected to the flow channel cavity (13) and are both arranged on the inner circle side of the packaging edge (15).

9. The battery pack according to claim 1, characterized in that: The thickness limiting strip (40) comprises a first thickness limiting strip (41) and a second thickness limiting strip (42), wherein: The first thickness limiting strip (41) and the second thickness limiting strip (42) are arranged in the first gap at an interval relative to each other along the second direction (B); The first thickness limiting strip (41) is connected to one of the battery strings (30), the second thickness limiting strip (42) is connected to another adjacent battery string (30), and the flexible cooling plate (10) is fixed between the first thickness limiting strip (41) and the second thickness limiting strip (42).

10. The battery pack according to claim 6, characterized in that: Along the second direction (B), the size of the flow channel cavity (13) is larger than the size of the packaging edge (15).

11. The battery pack according to claim 6, characterized in that: The packaging edge (15) of the first flexible shell (11) is connected to the packaging edge (15) of the second flexible shell (12) by one of gluing, hot pressing and cold pressing.

12. The battery pack according to claim 6, characterized in that: An insulating structure is provided on the side of the first flexible shell (11) and the second flexible shell (12) facing away from the flow channel cavity (13), and / or an insulating structure is provided on the side of the first flexible shell (11) and the second flexible shell (12) close to the flow channel cavity (13).

13. The battery pack according to claim 1, characterized in that: The elastic modulus of the thickness limiting strip (40) is greater than the elastic modulus of the flexible cooling plate (10).

14. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 13.

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