Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction and a second direction which are intersected, the battery pack comprises a heat management component and a plurality of battery monomers, the plurality of battery monomers are arranged along the first direction to form a battery pack, and the heat management component is arranged at one side of the battery pack; the heat management component comprises a first heat exchange part and a second heat exchange part, the first heat exchange part is provided with a first cavity, and the first cavity is configured to contain a first heat exchange medium and is provided with a first inlet and a first outlet; the second heat exchange part and the first heat exchange part are arranged in a spaced mode, and the second heat exchange part is provided with a second cavity. The second cavity is configured to contain a second heat exchange medium and is provided with a second inlet and a second outlet. In the second direction, the first inlet is adjacent to the second outlet, and the second inlet is adjacent to the first outlet; the heat exchange coefficient of the first heat exchange medium is larger than that of the second heat exchange medium. The first heat exchange medium and the second heat exchange medium are different in heat exchange coefficient and flow direction, rapid cooling can be achieved, and heat exchange uniformity can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and an electrical device. Background Art

[0002] As an important source of power, new energy battery packs face problems such as excessive temperature gradients and local overheating during the charging and discharging process due to high-power workloads and complex working environments, which directly affect the performance, safety and life of the battery. Liquid cooling plates are common thermal management components with good temperature uniformity, but they are heavy and have low cooling efficiency. They cannot achieve a fast and effective cooling effect for heat accumulation in local high-temperature areas of the battery pack. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to solve the problem of heat accumulation in local high-temperature areas of existing battery packs and the inability to achieve a rapid and effective cooling effect; another purpose of an embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of the present application has a first direction and a second direction intersecting each other, including:

[0005] A plurality of battery cells are arranged along the first direction to form a battery pack;

[0006] A thermal management component is disposed on one side of the battery pack; the thermal management component comprises:

[0007] A first heat exchange portion, connected to the battery pack and having a first cavity, wherein the first cavity is configured to accommodate a first heat exchange medium and has a first inlet and a first outlet;

[0008] a second heat exchange portion, spaced apart from the first heat exchange portion; the second heat exchange portion is connected to the battery pack and has a second cavity, the second cavity is configured to accommodate a second heat exchange medium and has a second inlet and a second outlet; along the second direction, the first inlet is adjacent to the second outlet, and the second inlet is adjacent to the first outlet;

[0009] Wherein, the heat exchange coefficient of the first heat exchange medium is greater than the heat exchange coefficient of the second heat exchange medium.

[0010] In some embodiments, the first heat exchange medium and the second heat exchange medium flow in opposite directions.

[0011] In some embodiments, the second heat exchange portion is disposed around the first heat exchange portion.

[0012] In some embodiments,

[0013] The first heat exchange part has a plurality of the first chambers, and the plurality of the first chambers are arranged at intervals; the first inlets of the plurality of the first chambers are connected, and the first outlets of the plurality of the first chambers are connected;

[0014] The second heat exchange part comprises a plurality of the second chambers, and the plurality of the second chambers are arranged at intervals; the second inlets of the plurality of the second chambers are connected, and the second outlets of the plurality of the second chambers are connected.

[0015] In some embodiments, the thermal management component includes:

[0016] A first plate body connected to the battery pack;

[0017] The second plate body is arranged on a side of the first plate body away from the battery pack; the second plate body has a first groove and a second groove arranged at intervals, the first plate body is connected to the second plate body and covers the first groove and the second groove; wherein the first groove is used to form the first cavity, and the second groove is used to form the second cavity.

[0018] In some embodiments,

[0019] The first inlet and the first outlet are arranged at intervals along the first direction;

[0020] The second inlet and the second outlet are spaced apart along the first direction.

[0021] In some embodiments, the heat management component includes a plurality of the second heat exchange parts, and the first heat exchange part is arranged between two adjacent second heat exchange parts.

[0022] In some embodiments, the thermal management component includes a plurality of the first heat exchange parts, and at least one second heat exchange part is disposed between two adjacent first heat exchange parts.

[0023] In some embodiments, the thermal management component further comprises:

[0024] a first manifold, connected to the plurality of first heat exchange parts respectively, and communicating with the first chamber through the first inlet;

[0025] a second manifold, arranged in a spaced relationship from the first manifold along the first direction and connected to the plurality of first heat exchange parts respectively, the second manifold being in communication with the first cavity through the first outlet;

[0026] a third manifold, connected to the plurality of second heat exchange parts respectively, and communicating with the second chamber through the second inlet;

[0027] The fourth manifold is spaced apart from the third manifold along the first direction and is respectively connected to a plurality of the second heat exchange parts. The fourth manifold is communicated with the second cavity through the second outlet.

[0028] In some embodiments, there is a third direction intersecting with the second direction, along the second direction, the size of the first cavity is a mm, the size of the second cavity is b mm, satisfying: a<b; along the third direction, the size of the first cavity is c mm, the size of the second cavity is d mm, satisfying: c≤d.

[0029] Correspondingly, an electrical device described in an embodiment of the present application includes the battery pack described in any one of the aforementioned embodiments.

[0030] Beneficial effect: Compared with the prior art, a battery pack according to an embodiment of the present application has a first direction and a second direction intersecting each other, includes a thermal management component and a plurality of battery cells, the plurality of battery cells are arranged along the first direction to form a battery pack, and the thermal management component is arranged on one side of the battery pack; the thermal management component includes a first heat exchange part and a second heat exchange part, the first heat exchange part is connected to the battery pack and has a first cavity, the first cavity is configured to accommodate a first heat exchange medium and has a first inlet and a first outlet; the second heat exchange part is spaced apart from the first heat exchange part, the second heat exchange part is connected to the battery pack and has a second cavity, the second cavity is configured to accommodate a second heat exchange medium and has a second inlet and a second outlet; along the second direction, the first inlet is adjacent to the second outlet, and the second inlet is adjacent to the first outlet; wherein the heat exchange coefficient of the first heat exchange medium is greater than the heat exchange coefficient of the second heat exchange medium. The present application realizes different heat exchange effects of the first heat exchange part and the second heat exchange part on different positions by arranging the first heat exchange part and the second heat exchange part at intervals and configuring different heat exchange media inside the two parts; at this time, by rationally arranging the position of the first heat exchange part, rapid cooling of the local high-temperature area can be achieved, and the heat exchange uniformity of the thermal management component can be improved; in addition, along the second direction, the first inlet and the second outlet are adjacent to each other, and the second inlet and the first outlet are adjacent to each other, which can realize different flow directions of the first heat exchange medium and the second heat exchange medium, and at this time, the heat exchange uniformity of the thermal management component can be further improved.

[0031] Compared with the prior art, an electric device in an embodiment of the present application includes a battery pack as described in any one of the above embodiments. It is understandable that the electric device in an embodiment of the present application can have all the technical features and corresponding beneficial effects of the above battery pack, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present application;

[0034] Figure 2 is a schematic diagram of the overall structure of a thermal management component according to an embodiment of the present application;

[0035] Figure 3 yes Figure 2 A schematic diagram of the distribution of a first heat exchange portion and a second heat exchange portion of a heat management component and the flow directions of a first heat exchange medium and a second heat exchange medium in an embodiment;

[0036] Figure 4 is a schematic diagram of the distribution of the first heat exchange part and the second heat exchange part of the second heat management component of the embodiment of the present application and the flow direction of the first heat exchange medium and the second heat exchange medium;

[0037] Figure 5 is a partial cross-sectional view of a first thermal management component and a second thermal management component in an embodiment of the present application;

[0038] Figure 6 is a schematic diagram of the overall structure of a third thermal management component in an embodiment of the present application;

[0039] Figure 7 is a cross-sectional view of a first heat exchange portion and a second heat exchange portion of a third heat management component of an embodiment of the present application;

[0040] Figure 8 is a schematic diagram of the flow directions of the first heat exchange medium and the second heat exchange medium of the third heat management component of the embodiment of the present application;

[0041] Fig. 9 It is a schematic diagram of the overall structure of a battery pack using the third thermal management component according to an embodiment of the present application.

[0042] Figure numerals: 1, battery pack; 11, battery cell; 2, thermal management component; 21, first heat exchange unit; 211, first cavity; 2111, first inlet; 2112, first outlet; 22, second heat exchange unit; 221, second cavity; 2211, second inlet; 2212, second outlet; 23, first plate; 24, second plate; 241, first groove; 242, second groove; 25, first manifold; 26, second manifold; 27, third manifold; 28, fourth manifold; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0045] It should also be noted that in the drawings of the present application, the arrow marked X indicates the first direction X, the arrow marked Y indicates the second direction Y, and the arrow marked Z indicates the third direction Z. In the embodiment of the present application, the first direction X is the direction in which the multiple battery cells 11 are arranged in the battery pack 1, the second direction Y is the direction in which the first heat exchange part and the second heat exchange part are arranged at intervals, and the third direction Z is the direction in which the thermal management component and the battery pack are arranged; the first direction X, the second direction Y and the third direction Z are introduced to facilitate the description of the structural position relationship of the various components of the battery pack, and thus facilitate the understanding of its structure. In the embodiment of the present application, the first direction X, the second direction Y and the third direction Z are preferably perpendicular to each other.

[0046] With the popularization of 800V high-voltage architecture of automobile companies and the development of battery fast charging technology, high-power workloads and complex working environments cause battery packs to face problems such as excessive temperature gradients and local overheating, which directly affect the performance, safety and life of the battery. Therefore, the thermal management of battery packs has become a focus of attention. The common liquid cooling has good temperature averaging performance, but it has problems such as heavy weight and low cooling efficiency. Direct cooling has a fast cooling rate, but poor temperature averaging performance.

[0047] In view of this, an embodiment of the present application provides a battery pack to solve the above-mentioned problem.

[0048] like Figure 1 As shown, a battery pack according to an embodiment of the present application has a first direction X and a second direction Y intersecting each other, includes a thermal management component 2 and a plurality of battery cells 11, the plurality of battery cells 11 are arranged along the first direction X to form a battery pack 1, and the thermal management component 2 is disposed on one side of the battery pack 1; the thermal management component 2 includes a first heat exchange portion 21 and a second heat exchange portion 22, the first heat exchange portion 21 is connected to the battery pack 1 and has a first cavity 211, the first cavity 211 is configured to accommodate a first heat exchange medium and has a first inlet 2111 and The first outlet 2112; the second heat exchange part 22 is spaced apart from the first heat exchange part 21, the second heat exchange part 22 is connected to the battery pack 1 and has a second cavity 221, the second cavity 221 is configured to accommodate a second heat exchange medium and has a second inlet 2211 and a second outlet 2212; along the second direction Y, the first inlet 2111 and the second outlet 2212 are adjacently arranged, and the second inlet 2211 and the first outlet 2112 are adjacently arranged; wherein the heat transfer coefficient of the first heat exchange medium is greater than the heat transfer coefficient of the second heat exchange medium.

[0049] In the embodiment of the present application, the first heat exchange part 21 and the second heat exchange part 22 are arranged at intervals and different heat exchange media are configured inside the two, so that different heat exchange effects of the first heat exchange part 21 and the second heat exchange part 22 at different positions are achieved; at this time, the position of the first heat exchange part 21 is reasonably arranged, so that the rapid cooling of the local high temperature area can be achieved, and the heat exchange uniformity of the thermal management component 2 can be improved; in addition, along the second direction Y, the first inlet 2111 and the second outlet 2212 are adjacent to each other, and the second inlet 2211 and the first outlet 2112 are adjacent to each other, which can achieve different flow directions of the first heat exchange medium and the second heat exchange medium. At this time, the heat exchange uniformity of the thermal management component 2 can be further improved.

[0050] Specifically, the thermal management component 2 of the present application is provided with a first heat exchange part 21 and a second heat exchange part 22 which are arranged at intervals, and a first heat exchange medium is provided in the first cavity 211 of the first heat exchange part 21, and a second heat exchange medium is provided in the second cavity 221 of the second heat exchange part 22, and at the same time, the heat exchange coefficient of the first heat exchange medium is configured to be greater than the heat exchange coefficient of the second heat exchange medium. At this time, the heat exchange efficiency of the first heat exchange part 21 can be greater than the heat exchange efficiency of the second heat exchange part 22, so that one thermal management component 2 has two heat exchange efficiencies, so that different heat exchange rates can be achieved in the areas of the battery pack 1 corresponding to different heat exchange parts, thereby achieving different heat exchange effects. Specifically, the first heat exchange part 21 can be configured for heat exchange according to the position where the high temperature area is prone to appear in the battery pack, and the second heat exchange part 22 can be configured for heat exchange in the area where the temperature rise is not so high. At this time, the first heat exchange part 21 can be used to quickly heat and cool the area with higher temperature rise in the battery pack, and the second heat exchange part 22 can be used to heat and cool the area with relatively low temperature rise. By setting this structure, the temperature of the battery pack can be quickly cooled down.

[0051] In addition, the embodiment of the present application is arranged along the second direction Y, the first inlet 2111 and the second outlet 2212 are arranged adjacent to each other, and the second inlet 2211 and the first outlet 2112 are arranged adjacent to each other, that is, along the second direction Y, the inlet of the first chamber 211 is adjacent to the outlet of the second chamber 221, and the outlet of the first chamber 211 is adjacent to the inlet of the second chamber 221. At this time, it is possible to achieve different flow directions of the first heat exchange medium and the second heat exchange medium, which can be opposite in flow direction or intersecting at a certain angle. It is possible to achieve the inflow and outflow of heat exchange media in different directions, and a more uniform heat exchange effect can be achieved. Because, if the inlets of the first chamber 211 and the second chamber 221 are adjacent, and the outlets of the first chamber 211 and the second chamber 221 are arranged adjacent to each other, at this time, the first heat exchange medium in the first chamber 211 and the second heat exchange medium in the second chamber 221 have the same flow direction, which will result in a relatively low temperature on the inlet side and a relatively high temperature on the outlet side. Therefore, when cooling the battery pack, the embodiment of the present application can have better temperature uniformity compared to the situation where the entrances of the first cavity 211 and the second cavity 221 are adjacent, and the exits of the first cavity 211 and the second cavity 221 are adjacent.

[0052] It should also be noted that the first heat exchange medium in the embodiment of the present application may be a direct cooling medium, and the second heat exchange medium may be a liquid cooling medium. Correspondingly, the heat exchange coefficient of the direct cooling medium is greater than the heat exchange coefficient of the liquid cooling medium.

[0053] In the embodiment of the present application, by combining the advantages of direct cooling medium and liquid cooling medium, the temperature distribution in the battery pack is ensured to be uniform while satisfying the requirement of rapid cooling of the battery pack.

[0054] Please refer to Figure 3 , Figure 4 and Figure 8 In some embodiments, the flow directions of the first heat exchange medium and the second heat exchange medium are opposite.

[0055] In the embodiment of the present application, by setting the first heat exchange medium and the second heat exchange cutoff flow directions to be opposite, it can be achieved that when the first heat exchange part 21 and the second heat exchange part 22 are adjacently arranged, there are at least some parallel sections. At this time, the corresponding first heat exchange medium and the second heat exchange medium flow in opposite directions from both sides of the same direction, so that the temperatures at the inlet of the first chamber 211 of the first heat exchange part 21 and the outlet of the second chamber 221 of the second heat exchange part 22 can be balanced with each other, and the temperatures at the outlet of the first chamber 211 of the first heat exchange part 21 and the inlet of the second chamber 221 of the second heat exchange part 22 can be balanced with each other, thereby improving the temperature uniformity of the cooling of the thermal management component 2.

[0056] Please refer to Figure 2-Figure 4 In some embodiments, the second heat exchange portion 22 is disposed around the first heat exchange portion 21 .

[0057] In the embodiment of the present application, the second heat exchange part 22 is arranged around the first heat exchange part 21, so that the first heat exchange part 21 can be located in the middle of the thermal management component 2. Correspondingly, the temperature in the middle of the battery pack is more likely to rise. Therefore, by arranging the first heat exchange part 21 in the middle of the thermal management component 2, the heat accumulation in the high-temperature area in the middle of the battery pack can be quickly cooled down, thereby avoiding the possibility of thermal runaway of the battery pack. At the same time, the second heat exchange part 22 is used to cool down the rest of the battery pack outside the first heat exchange part 21, so as to achieve better temperature uniformity.

[0058] like Figure 2 , Figure 3 and Figure 7 As shown, in some embodiments, the first heat exchange part 21 has a plurality of first cavities 211, and the plurality of first cavities 211 are arranged at intervals; the first inlets 2111 of the plurality of first cavities 211 are connected, and the first outlets 2112 of the plurality of first cavities 211 are connected; the second heat exchange part 22 has a plurality of second cavities 221, and the plurality of second cavities 221 are arranged at intervals; the second inlets 2211 of the plurality of second cavities 221 are connected, and the second outlets 2212 of the plurality of second cavities 221 are connected.

[0059] In the embodiment of the present application, the provision of multiple first chambers 211 and multiple second chambers 221 can achieve a more reasonable distribution of the first heat exchange medium and the second heat exchange medium, increase the heat exchange area of ​​the first heat exchange part 21 and the second heat exchange part 22, thereby facilitating rapid and uniform heat exchange.

[0060] In the embodiment of the present application, the first inlets 2111 of the multiple first chambers 211 are connected, the first outlets 2112 of the multiple first chambers 211 are connected, the second inlets 2211 of the multiple second chambers 221 are connected, and the second outlets 2212 of the multiple second chambers 221 are connected, which facilitates the efficient injection of the first heat exchange medium and the second heat exchange medium, as well as the outflow and collection.

[0061] In some embodiments, the thermal management component 2 includes a first plate 23 and a second plate 24, the first plate 23 is connected to the battery pack 1, and the second plate 24 is arranged on a side of the first plate 23 away from the battery pack 1; the second plate 24 has a first groove 241 and a second groove 242 arranged at intervals, the first plate 23 is connected to the second plate 24 and covers the first groove 241 and the second groove 242; wherein the first groove 241 is used to form a first cavity 211, and the second groove 242 is used to form a second cavity 221.

[0062] In the embodiment of the present application, the thermal management component 2 can be formed by connecting and packaging a first plate 23 and a second plate 24. The first plate 23 is connected to the battery pack 1 for heat exchange with the battery pack 1, and the second plate 24 can be formed by stamping. The first groove 241 and the second groove 242 are stamped out on the second plate 24 to accommodate the first heat exchange medium and the second heat exchange medium respectively. The second plate 24 is formed by stamping, which can simplify the overall structure of the thermal management component 2 and facilitate production. At the same time, the first plate 23 and the second plate 24 can be connected together by brazing to realize the packaging of the first groove 241 and the second groove 242, and form the first cavity 211 and the second cavity 221 accordingly. At this time, the first heat exchange medium flows through the first cavity 211 formed by the first groove 241 and exchanges heat through the first plate 23, and the second heat exchange medium flows through the second cavity 221 formed by the second groove 242 and exchanges heat through the first plate 23. This structure is easy to implement and can ensure a variety of arrangements of the first heat exchange part 21 and the second heat exchange part 22.

[0063] like Figure 8 As shown, in some embodiments, the first inlet 2111 and the first outlet 2112 are arranged at intervals along the first direction X; the second inlet 2211 and the second outlet 2212 are arranged at intervals along the first direction X.

[0064] In the embodiment of the present application, the first inlet 2111 and the first outlet 2112 are arranged at intervals along the first direction X, and the corresponding first heat exchange part 21 can be a straight line or a curve extending along the first direction X; the second inlet 2211 and the second outlet 2212 are arranged at intervals along the first direction X, and the corresponding second heat exchange part 22 can be a straight line or a curve extending along the first direction X. At the same time, the first heat exchange part 21 and the second heat exchange part 22 can be arranged at intervals along the first direction X, and it is further preferred that the first heat exchange part 21 and the second heat exchange part 22 extend along the first direction X and are arranged in parallel along the second direction Y. On the basis that the first heat exchange medium and the second heat exchange medium flow in opposite directions, it can be achieved that the temperature of the battery pack 1 is relatively uniform after the thermal management component 2 exchanges heat with the battery pack 1 along the first direction X.

[0065] like Figure 6 , Figure 8 and Fig. 9 As shown, in some embodiments, the heat management component 2 includes a plurality of second heat exchange parts 22 , and the first heat exchange part 21 is arranged between two adjacent second heat exchange parts 22 .

[0066] In the embodiment of the present application, there may be multiple second heat exchange parts 22, and the first heat exchange part 21 is arranged between two adjacent second heat exchange parts 22, so that the first heat exchange part 21 is surrounded by the first heat exchange part 21. At this time, the corresponding first heat exchange part 21 can be located in the middle of the thermal management component 2, which can focus on the rapid heat exchange and cooling of the high temperature accumulation area in the middle of the battery pack 1, and at the same time, the second heat exchange parts 22 on both sides of the first heat exchange part 21 are used to cool the battery pack 1 synchronously, so that the temperature of the battery pack 1 can be uniform.

[0067] like Figure 6 , Figure 8 and Fig. 9 As shown, in some embodiments, the heat management component 2 includes a plurality of first heat exchange parts 21 , and at least one second heat exchange part 22 is disposed between two adjacent first heat exchange parts 21 .

[0068] In the embodiment of the present application, the first heat exchange part 21 and the second heat exchange part 22 can be arranged alternately, or two second heat exchange parts 22 and one first heat exchange part 21 form a heat exchange group. Such a combination can achieve better temperature uniformity and faster cooling rate of the thermal management component 2.

[0069] It should be noted that the present application is equivalent to setting up two heat exchange systems in the thermal management component 2, which can effectively improve the safety and reliability of thermal management. If one heat exchange system fails, the other heat exchange system can still work normally, thereby effectively ensuring the safety of the battery pack.

[0070] like Figure 6 and Figure 8 As shown, in some embodiments, the thermal management component 2 also includes a first manifold 25, a second manifold 26, a third manifold 27 and a fourth manifold 28; the first manifold 25 is respectively connected to the plurality of first heat exchange parts 21, and is communicated with the first cavity 211 through the first inlet 2111; the second manifold 26 is spaced apart from the first manifold 25 along the first direction X, and is respectively connected to the plurality of first heat exchange parts 21, and the second manifold 26 is communicated with the first cavity 211 through the first outlet 2112; the third manifold 27 is respectively connected to the plurality of second heat exchange parts 22, and is communicated with the second cavity 221 through the second inlet 2211; the fourth manifold 28 is spaced apart from the third manifold 27 along the first direction X, and is respectively connected to the plurality of second heat exchange parts 22, and the fourth manifold 28 is communicated with the second cavity 221 through the second outlet 2212.

[0071] In the embodiment of the present application, the first manifold 25 is connected to the first inlet 2111 of the plurality of first cavities 211, and the second manifold 26 is connected to the first outlet 2112 of the plurality of first cavities 211, so that the first manifold 25 and the second manifold 26 are connected through the plurality of first cavities 211. In this way, it is convenient to realize that the first heat exchange medium in the plurality of first heat exchange parts 21 is input from the input port of the first manifold 25 and converges into the second manifold 26 and then flows out, so as to realize the circulation of the first heat exchange medium. Similarly, the third manifold 27 is connected to the second inlet 2211 of the plurality of second cavities 221, and the fourth manifold 28 is connected to the second outlet 2212 of the plurality of second cavities 221, so as to realize the communication between the third manifold 27 and the fourth manifold 28 through the plurality of second cavities 221. At this time, it is convenient to realize that the second heat exchange medium in the plurality of second heat exchange parts 22 is input from the input port of the third manifold 27, converges into the fourth manifold 28 and then flows out, so as to realize the circulation of the second heat exchange medium. The thermal management component 2 of the aforementioned embodiment has a simple structure and is easy to implement.

[0072] Furthermore, the second manifold 26 is spaced apart from the first manifold 25 along the first direction X, and the fourth manifold 28 is spaced apart from the third manifold 27 along the first direction X. At this time, the input and output of the heat exchange medium can be entered from both ends of the thermal management component 2, which can reduce the heat exchange path of the heat exchange medium. In this way, a larger temperature difference between the heat exchange medium and the battery pack 1 can be achieved, which is convenient for rapid heat exchange and can also ensure the uniformity of heat exchange.

[0073] like Figure 5 and Figure 7 As shown, in some embodiments, there is a third direction Z intersecting with the second direction Y. Along the second direction Y, the size of the first cavity 211 is a mm, and the size of the second cavity 221 is b mm, satisfying: a<b; along the third direction Z, the size of the first cavity 211 is c mm, and the size of the second cavity 221 is d mm, satisfying: c≤d.

[0074] In the embodiment of the present application, since the heat exchange coefficients of the first heat exchange medium and the second heat exchange medium are different, the corresponding heat exchange rates are different. At this time, if the first chamber 211 and the second chamber 221 are set to be the same size, there will be a large difference in the heat exchange rates of the first heat exchange part 21 and the second heat exchange part 22, which is not conducive to the uniform temperature of the heat exchange of the thermal management component 2. Therefore, the present application sets the size of the first chamber 211 along the second direction Y to be smaller than the size of the second chamber 221, and the size of the first chamber 211 along the third direction Z is less than or equal to the size of the second chamber 221, which can ensure the rapid heat exchange and cooling of the first heat exchange medium, and avoid the flow rate of the first heat exchange medium being greater than the flow rate of the second heat exchange medium, which will affect the uniform temperature of the thermal management component 2.

[0075] Furthermore, in the embodiment, it is preferred to set the size of the first cavity 211 along the third direction Z to be equal to the size of the second cavity 221, which is convenient for the production of the thermal management component 2. Under this condition, the size of the second cavity 221 along the second direction Y is further set to be greater than or equal to the size of the first cavity 211, which can simultaneously ensure the reasonable working conditions of the first heat exchange part 21 and the second heat exchange part 22, and achieve better heat exchange effect and temperature uniformity.

[0076] It should also be noted that, in a specific embodiment, the size difference ratio of the first cavity 211 and the second cavity 221 can be flexibly adjusted according to specific working conditions, so as to meet the use requirements of different working conditions and extend the service life of the battery pack.

[0077] It should be noted that, in the embodiment of the present application, the cross-sectional shape of the first cavity 211 and the second cavity 221 along the second direction Y may be a trapezoidal structure or a rectangular structure, wherein chamfered corners may be provided at corresponding corner positions.

[0078] Correspondingly, an electrical device according to an embodiment of the present application includes the battery pack of any one of the aforementioned embodiments.

[0079] It can be understood that the electric device of the embodiment of the present application can have all the technical features and corresponding beneficial effects of the above-mentioned battery pack, which will not be elaborated here.

[0080] It should be noted that the electrical devices referred to in this application may include but are not limited to backup power supplies, electrodes, electric vehicles, electric bicycles, electric motorcycles, computers, large batteries, etc.

[0081] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0082] The above is a detailed introduction to a battery pack and an electrical device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: Having an intersecting first direction and a second direction, comprising: A plurality of battery cells are arranged along the first direction to form a battery pack; A thermal management component is disposed on one side of the battery pack; the thermal management component comprises: A first heat exchange portion, connected to the battery pack and having a first cavity, wherein the first cavity is configured to accommodate a first heat exchange medium and has a first inlet and a first outlet; a second heat exchange portion, spaced apart from the first heat exchange portion; the second heat exchange portion is connected to the battery pack and has a second cavity, the second cavity is configured to accommodate a second heat exchange medium and has a second inlet and a second outlet; along the second direction, the first inlet is adjacent to the second outlet, and the second inlet is adjacent to the first outlet; Wherein, the heat exchange coefficient of the first heat exchange medium is greater than the heat exchange coefficient of the second heat exchange medium.

2. The battery pack according to claim 1, characterized in that: The flow directions of the first heat exchange medium and the second heat exchange medium are opposite.

3. The battery pack according to claim 2, characterized in that: The second heat exchange portion is disposed around the first heat exchange portion.

4. The battery pack according to claim 3, characterized in that: The first heat exchange part has a plurality of the first chambers, and the plurality of the first chambers are arranged at intervals; the first inlets of the plurality of the first chambers are connected, and the first outlets of the plurality of the first chambers are connected; The second heat exchange part has a plurality of the second chambers, and the plurality of the second chambers are arranged at intervals; The second inlets of the plurality of second chambers are connected, and the second outlets of the plurality of second chambers are connected.

5. The battery pack according to any one of claims 1 to 4, characterized in that: The thermal management component comprises: A first plate connected to the battery pack; The second plate body is arranged on a side of the first plate body away from the battery pack; the second plate body has a first groove and a second groove arranged at intervals, the first plate body is connected to the second plate body and covers the first groove and the second groove; wherein the first groove is used to form the first cavity, and the second groove is used to form the second cavity.

6. The battery pack according to claim 4, characterized in that: The first inlet and the first outlet are arranged at intervals along the first direction; The second inlet and the second outlet are spaced apart along the first direction.

7. The battery pack according to claim 6, characterized in that: The heat management component includes a plurality of the second heat exchange parts, and the first heat exchange part is arranged between two adjacent second heat exchange parts at intervals.

8. The battery pack according to claim 7, characterized in that: The heat management component includes a plurality of the first heat exchange parts, and at least one second heat exchange part is arranged between two adjacent first heat exchange parts.

9. The battery pack according to claim 8, characterized in that: The thermal management component also includes: a first manifold, connected to the plurality of first heat exchange parts respectively, and communicating with the first chamber through the first inlet; a second manifold, arranged in a spaced relationship from the first manifold along the first direction and connected to the plurality of first heat exchange parts respectively, the second manifold being in communication with the first cavity through the first outlet; a third manifold, connected to the plurality of second heat exchange parts respectively, and communicating with the second chamber through the second inlet; The fourth manifold is spaced apart from the third manifold along the first direction and is respectively connected to a plurality of the second heat exchange parts. The fourth manifold is communicated with the second cavity through the second outlet.

10. The battery pack according to claim 1, characterized in that: It has a third direction intersecting with the second direction. Along the second direction, the size of the first cavity is a mm, the size of the second cavity is b mm, and the following conditions are met: a<b; along the third direction, the size of the first cavity is c mm, the size of the second cavity is d mm, and the following conditions are met: c≤d.

11. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-10.

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