Heat exchange plate, battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery assembling and manufacturing, in particular to a heat exchange plate, a battery pack and electric equipment. The heat exchange plate comprises a heat exchange area, the heat exchange area comprises a turbulent flow channel and a direct flow channel which communicate with each other, the end, away from the direct flow channel, of the turbulent flow channel is connected with a liquid inlet allowing a heat exchange medium to flow in, and the end, away from the turbulent flow channel, of the direct flow channel is connected with a liquid outlet allowing the heat exchange medium to flow out. The heat exchange plate is provided with the heat exchange areas, each heat exchange area is divided into the corresponding turbulent flow channel and the corresponding direct flow channel which communicate with each other, the turbulent flow channels can strengthen disturbance of the heat exchange medium and enhance the heat exchange amount, and the heat exchange effect of the turbulent flow channels can be higher than that of the direct flow channels through liquid inlet of the turbulent flow channels and liquid outlet of the direct flow channels; therefore, heat exchange of the area with overhigh local temperature in the battery pack can be enhanced through the turbulent flow channel, the highest temperature of the battery is reduced, the overall temperature difference of the battery is reduced, the temperature uniformity of the battery pack is improved, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of battery assembly and manufacturing, and in particular to a heat exchange plate, a battery pack and electrical equipment. Background Art

[0002] At present, for battery packs, especially power battery packs, in order to reduce the temperature of the battery pack, a cooler is usually installed in the battery pack to dissipate heat. The commonly used cooler exchanges heat through a heat exchange medium flowing in the cooling channel. The heat exchange medium flows into the channel through an inlet, circulates in the channel, and finally flows out of the channel from an outlet, completing the circulation of the heat exchange medium in the channel. The heat exchange medium absorbs heat through evaporation and exchanges heat with the battery, thereby achieving the purpose of cooling the battery pack.

[0003] However, due to the different heat generation in different areas of the battery, the temperature in some local areas is too high, resulting in a large temperature difference in the battery pack as a whole. Using a traditional cooler can easily lead to uneven temperature on the battery, resulting in reduced energy efficiency of the battery pack and affecting the service life of the battery pack. Utility Model Content

[0004] Based on this, the present application provides a heat exchange plate, a battery pack and an electrical device to solve the problem of uneven temperature on the battery, which leads to reduced energy efficiency of the battery pack and affects the service life of the battery pack.

[0005] In one aspect, the present application provides a heat exchange plate, comprising:

[0006] A heat exchange region, the heat exchange region comprising interconnected turbulent flow channels and straight flow channels;

[0007] Along the flow path direction, the end of the turbulent flow channel away from the straight flow channel is connected to a liquid inlet for heat exchange medium to flow in, and the end of the straight flow channel away from the turbulent flow channel is connected to a liquid outlet for heat exchange medium to flow out.

[0008] In a possible implementation, the heat exchange area also includes a main liquid inlet channel, and the spoiler channel includes multiple spoiler branch channels. Along the flow direction, one end of the main liquid inlet channel is connected to the liquid inlet, and the other end of the main liquid inlet channel is respectively connected to the multiple spoiler branch channels.

[0009] In a possible implementation, the spoiler flow channel also includes multiple spoiler flow branch channels, the number of which is greater than the number of spoiler flow tributaries, and along the flow direction, the spoiler flow tributaries are connected to at least one spoiler flow branch channel at one end away from the main liquid inlet channel.

[0010] In a possible implementation, the heat exchange area also includes a main liquid outlet channel, the direct current channel includes multiple direct current branch channels, and along the flow direction, one end of the main liquid outlet channel is connected to the liquid outlet, and the other end of the main liquid outlet channel is respectively connected to the multiple direct current branch channels.

[0011] In a possible implementation, the DC flow channel further includes a plurality of DC sub-flow channels, the number of the DC sub-flow channels being greater than the number of the DC branch channels. Along the flow path direction, one end of each DC branch channel away from the main liquid outlet channel is respectively communicated with one end of at least one DC sub-flow channel, and the other ends of the DC sub-flow channels are respectively communicated with the turbulence flow channel.

[0012] In a possible implementation, the heat exchange area includes a first heat exchange area and a second heat exchange area, and the first heat exchange area and the second heat exchange area are arranged side by side;

[0013] The first heat exchange area includes a first turbulence flow channel and a first DC flow channel which are communicated with each other, and the second heat exchange area includes a second turbulence flow channel and a second DC flow channel which are communicated with each other;

[0014] The first turbulence flow channel is arranged on a side of the first DC flow channel away from the second heat exchange area, and the second turbulence flow channel is arranged on a side of the second DC flow channel away from the first heat exchange area.

[0015] In a possible implementation, the first heat exchange area further includes a first main liquid inlet channel. The first turbulence flow channel includes a plurality of first turbulence branch channels. Along the flow path direction, one end of the first main liquid inlet channel is connected to the liquid inlet, and the other end of the first main liquid inlet channel is respectively communicated with the plurality of first turbulence branch channels.

[0016] In a possible implementation, the first turbulence flow channel further includes a plurality of first turbulence sub-flow channels, the number of the first turbulence sub-flow channels being greater than the number of the first turbulence branch channels. Along the flow path direction, one end of each first turbulence branch channel away from the first main liquid inlet channel is respectively communicated with at least one first turbulence sub-flow channel.

[0017] In a possible implementation, the first heat exchange area further includes a first main liquid outlet channel. The first DC flow channel includes a plurality of first DC branch channels. Along the flow path direction, one end of the first main liquid outlet channel is provided with the liquid outlet, and the other end of the first main liquid outlet channel is respectively communicated with the plurality of first DC branch channels.

[0018] In a possible implementation, the first DC flow channel further includes a plurality of first DC sub-flow channels, the number of the first DC sub-flow channels being greater than the number of the first DC branch channels. Along the flow path direction, one end of each first DC branch channel away from the first main liquid outlet channel is respectively communicated with one end of at least one first DC sub-flow channel, and the other ends of the first DC sub-flow channels are respectively communicated with the corresponding first turbulence sub-flow channels.

[0019] In a possible implementation, the first heat exchange area and the second heat exchange area are symmetrically arranged, and / or the first turbulence flow channel and the second turbulence flow channel are symmetrically arranged, and / or the first DC flow channel and the second DC flow channel are symmetrically arranged.

[0020] In a possible implementation, multiple heat exchange regions are divided into at least two groups arranged in sequence along a first direction, each group including two heat exchange regions arranged side by side. In the two heat exchange regions of each group, the turbulent flow channel of one of the heat exchange regions is provided on the side of the straight flow channel of this heat exchange region away from the other heat exchange region, where the first direction is perpendicular to the arrangement direction of the two side-by-side heat exchange regions in the same group.

[0021] In a possible implementation, the heat exchange regions include a first heat exchange region, a second heat exchange region, a third heat exchange region, and a fourth heat exchange region. The first heat exchange region and the second heat exchange region are arranged side by side, the third heat exchange region and the fourth heat exchange region are arranged side by side, and the third heat exchange region is opposite to the first heat exchange region, and the fourth heat exchange region is opposite to the second heat exchange region;

[0022] The third heat exchange region includes a third turbulent flow channel and a third straight flow channel that are connected. The fourth heat exchange region includes a fourth turbulent flow channel and a fourth straight flow channel that are connected. The third turbulent flow channel is provided on the side of the third straight flow channel away from the fourth heat exchange region, and the fourth turbulent flow channel is provided on the side of the fourth straight flow channel away from the third heat exchange region.

[0023] In a possible implementation, the third heat exchange region further includes a third main liquid inlet channel. The third turbulent flow channel includes a plurality of third turbulent flow branch channels. Along the flow path direction, one end of the third main liquid inlet channel is connected to the liquid inlet, and the other end of the third main liquid inlet channel is respectively connected to the plurality of third turbulent flow branch channels.

[0024] In a possible implementation, the third turbulent flow channel further includes a plurality of third turbulent flow dividing channels. The number of the third turbulent flow dividing channels is greater than the number of the third turbulent flow branch channels. Along the flow path direction, one end of the third turbulent flow branch channel away from the third main liquid inlet channel is respectively connected to at least one third turbulent flow dividing channel.

[0025] In a possible implementation, the third heat exchange region further includes a third main liquid outlet channel. The third straight flow channel includes a plurality of third straight flow branch channels. Along the flow path direction, one end of the third main liquid outlet channel is provided with a liquid outlet, and the other end of the third main liquid outlet channel is respectively connected to the plurality of third straight flow branch channels.

[0026] In a possible implementation, the third straight flow channel further includes a plurality of third straight flow dividing channels. The number of the third straight flow dividing channels is greater than the number of the third straight flow branch channels. Along the flow path direction, one end of the third straight flow branch channel away from the third main liquid outlet channel is respectively connected to one end of at least one third straight flow dividing channel, and the other end of the third straight flow dividing channel is respectively connected to the corresponding third turbulent flow dividing channel.

[0027] In a possible implementation, the third heat exchange region and the fourth heat exchange region are located on the side of the first heat exchange region and the second heat exchange region away from the liquid inlet and the liquid outlet, and the diameters of the flow channels in the third heat exchange region and the fourth heat exchange region are larger than the diameters of the flow channels in the first heat exchange region and the second heat exchange region.

[0028] In a possible implementation, the third heat exchange region and the fourth heat exchange region are symmetrically arranged, and / or the third turbulent flow channel and the fourth turbulent flow channel are symmetrically arranged, and / or the third direct flow channel and the fourth direct flow channel are symmetrically arranged.

[0029] In a possible implementation, along the first direction, the area of the turbulent flow channels in the set of heat exchange regions closer to the liquid inlet is smaller than the area of the turbulent flow channels in the other set of heat exchange regions farther from the liquid inlet.

[0030] In a possible implementation, the spacing between the flow channels in the turbulent flow channel is smaller than the spacing between the flow channels in the direct flow channel.

[0031] In a possible implementation, along the flow direction of the heat exchange medium, the turbulent flow channel is wavy.

[0032] In a possible implementation, the turbulent flow channel and the direct flow channel are S-shaped turning flow channels.

[0033] In a possible implementation, the heat exchange plate includes a flow channel plate, a temperature equalizing plate, a liquid inlet joint, and a liquid outlet joint;

[0034] The flow channel plate is connected to the temperature equalizing plate, and turbulent flow channels and direct flow channels are formed between the flow channel plate and the temperature equalizing plate. The liquid inlet joint is connected to the liquid inlet, and the liquid outlet joint is connected to the liquid outlet.

[0035] In a possible implementation, the liquid inlet joint and the liquid outlet joint are located on the same side of the heat exchange plate.

[0036] In a possible implementation, in multiple heat exchange regions, the ratio of the area of each flow channel in each heat exchange region to the area of each flow channel in another heat exchange region is the same.

[0037] In a possible implementation, the number of turbulent flow channels in each heat exchange region is an even number.

[0038] On the other hand, the present application provides a battery pack, including a plurality of batteries and the above-mentioned heat exchange plate. The heat exchange plate is attached to the battery for cooling and / or heating the battery.

[0039] In a possible implementation, the battery has a first region and a second region. Among them, the battery has a first region and a second region, and the heat generation of the battery part corresponding to the second region is greater than that of the battery part corresponding to the first region. The turbulent flow channel corresponds to the second region of the battery, and the direct current flow channel corresponds to the first region of the battery.

[0040] In a possible implementation, a plurality of batteries are arranged in sequence along the thickness direction of the battery. The battery includes a first region in the middle and second regions on both sides. The turbulent flow channel corresponds to the second regions of the plurality of batteries, and the direct current flow channel corresponds to the first regions of the plurality of batteries.

[0041] In a possible implementation, a terminal post is provided on the second region of the battery.

[0042] In a possible implementation, a plurality of batteries are divided into at least two battery groups arranged in sequence. The heat generation of one battery group is greater than that of the other battery group. The area of the turbulent flow channel in the heat exchange region corresponding to one battery group is greater than the area of the turbulent flow channel in the heat exchange region corresponding to the other battery group.

[0043] On the other hand, the present application provides an electrical device, including an electrical device and the above-mentioned battery pack. The battery pack is used to provide electrical energy for the electrical device.

[0044] The heat exchange plate, battery pack and electrical device provided by the present application have a heat exchange region through the heat exchange plate, and the heat exchange region is divided into two parts: a turbulent flow channel and a direct current flow channel that are connected. The turbulent flow channel can strengthen the disturbance of the heat exchange medium, enhance the heat exchange amount, and by feeding liquid through the turbulent flow channel and discharging liquid through the direct current flow channel, the heat exchange effect of the turbulent flow channel can be higher than that of the direct current flow channel. Thus, the heat exchange of the locally overheated region in the battery pack can be strengthened through the turbulent flow channel, the highest temperature of the battery pack can be reduced, at the same time, the overall temperature difference of the battery is reduced, the temperature uniformity of the battery pack is improved, the energy efficiency of the battery pack is increased, and the service life of the battery pack is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 It is an exploded structural schematic diagram of the battery pack provided by the embodiment of the present application;

[0047] Figure 2 For Figure 1Explosion structure schematic diagram of the heat exchange plate in the shown battery pack;

[0048] Figure 3 is Figure 2 Structure schematic diagram of the shown heat exchange plate;

[0049] Figure 4 is Figure 3 Structure schematic diagram of the first heat exchange area and the second heat exchange area of the shown heat exchange plate;

[0050] Figure 5 is Figure 3 Structure schematic diagram of the third heat exchange area and the fourth heat exchange area of the shown heat exchange plate;

[0051] Figure 6 is Figure 1 Temperature simulation result diagram of the battery in the shown battery pack.

[0052] Explanation of reference numerals:

[0053] 100 - heat exchange plate; 101 - heat exchange area; 102 - turbulent flow channel; 103 - straight flow channel; 104 - liquid inlet; 105 - liquid outlet; 10 - first heat exchange area; 11 - first turbulent flow channel; 111 - first main liquid inlet channel; 112 - first turbulent branch channel; 113 - first turbulent diversion channel; 12 - first straight flow channel; 121 - first main liquid outlet channel; 122 - first straight branch channel; 123 - first straight diversion channel; 20 - second heat exchange area; 21 - second turbulent flow channel; 211 - second main liquid inlet channel; 212 - second turbulent branch channel; 213 - second turbulent diversion channel; 22 - second straight flow channel; 221 - second main liquid outlet channel; 222 - second straight branch channel; 223 - second straight diversion channel; 30 - third heat exchange area; 31 - third turbulent flow channel; 311 - third main liquid inlet channel; 312 - third turbulent branch channel; 313 - third turbulent diversion channel; 32 - third straight flow channel; 321 - third main liquid outlet channel; 322 - third straight branch channel; 323 - third straight diversion channel; 40 - fourth heat exchange area; 41 - fourth turbulent flow channel; 411 - fourth main liquid inlet channel; 412 - fourth turbulent branch channel; 413 - fourth turbulent diversion channel; 42 - fourth straight flow channel; 421 - fourth main liquid outlet channel; 422 - fourth straight branch channel; 423 - fourth straight diversion channel; 50 - flow channel plate; 60 - temperature equalizing plate; 70 - liquid inlet joint; 80 - liquid outlet joint; 200 - battery pack; 201 - battery; 202 - housing; 203 - first battery module; 204 - second battery module. Detailed implementation manners

[0054] To make the objectives, technical solutions, and advantages of this application more clear, the following will describe the technical solutions in the embodiments of this application in more detail with reference to the accompanying drawings in the preferred embodiments of this application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain this application and should not be construed as a limitation of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application. The following will explain the embodiments of this application in detail with reference to the accompanying drawings.

[0055] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] The terms "first", "second", "third" (if any) in the description, claims, and accompanying drawings of this application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence.

[0058] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or displays.

[0059] At present, for battery packs, especially power battery packs, in order to reduce the temperature of the battery pack, a cooler is usually installed in the battery pack to dissipate heat. The commonly used cooler exchanges heat through a heat exchange medium flowing in the cooling channel. The heat exchange medium flows into the channel through an inlet, circulates in the channel, and finally flows out of the channel from an outlet, completing the circulation of the heat exchange medium in the channel. The heat exchange medium absorbs heat through evaporation and exchanges heat with the battery, thereby achieving the purpose of cooling the battery pack.

[0060] However, due to the different heat generation in different areas of the battery, the temperature in some local areas is too high, resulting in a large temperature difference in the battery pack as a whole. Using a traditional cooler can easily lead to uneven temperature on the battery pack, resulting in reduced energy efficiency of the battery pack and affecting the service life of the battery pack.

[0061] After repeated thinking and verification, the inventors found that if the heat exchange plate is divided into multiple areas, and each area is divided into two parts, one part is provided with a turbulent flow channel, and the other part is provided with a direct flow channel, since the turbulent flow channel can enhance the disturbance of the heat exchange medium and enhance the heat exchange capacity, it is possible to enhance the heat exchange in the local area where the temperature is too high and reduce the maximum temperature of the battery pack. At the same time, the turbulent flow channel can be connected to the liquid inlet end and the direct flow channel can be connected to the liquid outlet end, so as to further improve the heat exchange capacity of the turbulent flow channel and reduce the maximum temperature of the battery pack. At the same time, the overall temperature difference of the battery is reduced, the temperature uniformity of the battery pack is improved, the energy efficiency of the battery pack is improved, and the service life of the battery pack is extended.

[0062] In view of this, the present application provides a heat exchange plate, comprising multiple heat exchange areas, the heat exchange area comprising interconnected turbulent flow channels and direct flow channels, along the flow direction, the end of the turbulent flow channel away from the direct flow channel is provided with a liquid inlet for heat exchange medium to flow in, and the end of the direct flow channel away from the turbulent flow channel is provided with a liquid outlet for heat exchange medium to flow out.

[0063] By dividing the heat exchange plate into multiple heat exchange areas, and dividing each heat exchange area into two interconnected parts, the turbulent flow channel and the direct flow channel, the turbulent flow channel can strengthen the disturbance of the heat exchange medium and enhance the heat exchange capacity. Moreover, by letting the liquid in through the turbulent flow channel and letting the liquid out through the direct flow channel, the heat exchange effect of the turbulent flow channel can be higher than that of the direct flow channel. Thus, the heat exchange of the local over-temperature area in the battery pack can be strengthened through the turbulent flow channel, the maximum temperature of the battery pack can be reduced, and the temperature difference of the battery as a whole can be reduced, the temperature uniformity of the battery pack can be improved, the energy efficiency of the battery pack can be improved, and the service life of the battery pack can be extended. In addition, since there are high-temperature areas and low-temperature areas in the battery, the heat exchange medium passes through the turbulent flow channel and the direct flow channel in sequence, that is, the heat exchange medium first exchanges heat with the battery area with high temperature, and then exchanges heat with the battery area with low temperature, which can further improve the heat exchange effect of the battery and reduce the temperature difference of the battery as a whole.

[0064] The content of the present application will be described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can understand the content of the present application more clearly and in detail.

[0065] Figure 1 It is an exploded structural schematic diagram of the battery pack provided by the embodiment of the present application. Figure 2 For Figure 1 It is an exploded structural schematic diagram of the heat exchange plate in the battery pack shown. Figure 3 For Figure 2 It is a structural schematic diagram of the heat exchange plate shown. Figure 4 For Figure 3 It is a structural schematic diagram of the first heat exchange area and the second heat exchange area of the heat exchange plate shown. Figure 5 For Figure 3 It is a structural schematic diagram of the third heat exchange area and the fourth heat exchange area of the heat exchange plate shown. Figure 6 For Figure 1 It is a temperature simulation result diagram of the battery in the battery pack shown.

[0066] As Figure 1 And Figure 2 As shown, the heat exchange plate 100 provided by the embodiment of the present application is applied to the battery pack 200. The battery pack 200 includes a battery 201 and a heat exchange plate 100. The heat exchange plate 100 is attached to the battery 201 for cooling or heating the battery 201.

[0067] The battery pack 200 further includes a housing 202. The battery 201 and the heat exchange plate 100 are respectively disposed in the housing 202. The housing 202 is used to protect the battery 201 and the heat exchange plate 100.

[0068] Please refer to Figure 3 at the same time. The heat exchange plate 100 includes a plurality of heat exchange areas 101. The plurality of heat exchange areas 101 respectively correspond to different positions of the battery 201, so as to cool or heat different areas of the battery 201 respectively.

[0069] Each heat exchange area 101 includes a turbulator flow channel 102 and a straight flow channel 103 that are connected. Along the flow path direction, one end of the turbulator flow channel 102 away from the straight flow channel 103 is connected with a liquid inlet 104 for the heat exchange medium to flow in, and one end of the straight flow channel 103 away from the turbulator flow channel 102 is connected with a liquid outlet 105 for the heat exchange medium to flow out.

[0070] The heat exchange medium may include a coolant and may also include a heating medium.

[0071] Among them, the turbulator flow channel 102 can strengthen the disturbance of the heat exchange medium, enhance the heat exchange amount, and by feeding the heat exchange medium through the turbulator flow channel 102 and discharging the liquid through the straight flow channel 103, the heat exchange effect of the turbulator flow channel 102 is higher than that of the straight flow channel 103.

[0072] Along the first direction X, the battery 201 is divided into at least two groups with different heat exchange requirements.

[0073] The multiple heat exchange regions 101 are divided into at least two groups arranged in sequence along the first direction. Each group includes two heat exchange regions 101 arranged side by side. Each group of heat exchange regions 101 corresponds to a group of batteries 201 respectively. In the two heat exchange regions 101 of each group, the turbulent flow channel 102 of one of the heat exchange regions 101 is arranged on the side of the direct current flow channel 103 of this heat exchange region 101 away from the other heat exchange region 101, where the first direction is perpendicular to the arrangement direction of the two heat exchange regions arranged side by side in the same group.

[0074] The multiple batteries 201 are arranged in sequence along the thickness direction of the battery 201, that is, the thickness direction of the battery 201 is parallel to the first direction X. The pole columns of the battery 201 are arranged at both ends of the battery 201. The battery 201 includes a first region in the middle and second regions on both sides, that is, the first region is the middle region of the battery, and the second region is the region where the pole columns of the battery are located. The heat generation amount of the first region in the middle is less than that of the second regions on both sides.

[0075] The turbulent flow channel 102 corresponds to the second regions of the multiple batteries 201, and the direct current flow channel 103 corresponds to the first regions of the multiple batteries 201.

[0076] In a possible implementation manner, the battery 201 is divided into a first battery module 203 and a second battery module 204. The heat exchange regions 101 include a first heat exchange region 10, a second heat exchange region 20, a third heat exchange region 30, and a fourth heat exchange region 40. The first heat exchange region 10 and the second heat exchange region 20 are one group. The third heat exchange region 30 and the fourth heat exchange region 40 are another group.

[0077] The battery 201 can be in the form of a module or a non-module form.

[0078] Among them, the first heat exchange region 10 and the second heat exchange region 20 correspond to the first battery module 203. The third heat exchange region 30 and the fourth heat exchange region 40 correspond to the second battery module 204. The first heat exchange region 10 and the second heat exchange region 20 are used to cool the first battery module 203. The third heat exchange region 30 and the fourth heat exchange region 40 are used to cool the second battery module 204.

[0079] By strengthening the heat exchange of the locally overheated region in the battery pack 200 through the turbulent flow channel 102, the maximum temperature of the battery 201 is reduced. At the same time, the overall temperature difference of the battery 201 is reduced, the temperature uniformity of the battery pack 200 is improved, the energy efficiency of the battery pack 200 is increased, and the service life of the battery pack 200 is extended.

[0080] Such as Figure 6As shown, due to the characteristics of the battery, the temperature in the areas on both sides of the first battery module 203 and the second battery module 204 is higher than that in the middle area. Therefore, in the first heat exchange area 10 and the second heat exchange area 20, the turbulent flow channels 102 are located on both sides of the first battery module 203 to cool the areas with higher temperature on both sides of the first battery module 203. In the third heat exchange area 30 and the fourth heat exchange area 40, the turbulent flow channels 102 are located on both sides of the second battery module 204 to cool the areas with higher temperature on both sides of the second battery module 204.

[0081] By using the turbulent flow channels 102 to exchange heat in the areas with excessively high local temperature in the battery pack 200, the maximum temperature of the battery 201 is reduced. At the same time, the overall temperature difference of the battery 201 is narrowed, the temperature uniformity of the battery pack 200 is improved, the energy efficiency of the battery pack 200 is increased, and the service life of the battery pack 200 is extended.

[0082] In a possible implementation, along the first direction X, the area of the turbulent flow channels 102 in a group of heat exchange areas 101 close to the liquid inlet 104 is smaller than the area of the turbulent flow channels 102 in another group of heat exchange areas 101 far from the liquid inlet 104.

[0083] In a possible implementation, the heat exchange area 101 further includes a main liquid inlet channel, and the turbulent flow channels include a plurality of turbulent flow branch channels. Along the flow path direction, one end of the main liquid inlet channel is connected to the liquid inlet 104, and the other end of the main liquid inlet channel is respectively communicated with the plurality of turbulent flow branch channels.

[0084] In a possible implementation, the turbulent flow channels further include a plurality of turbulent flow shunt channels, and the number of the turbulent flow shunt channels is greater than the number of the turbulent flow branch channels. Along the flow path direction, one end of each turbulent flow branch channel far from the main liquid inlet channel is respectively communicated with at least one turbulent flow shunt channel.

[0085] In a possible implementation, the heat exchange area 101 further includes a main liquid outlet channel, and the direct current channels include a plurality of direct current branch channels. Along the flow path direction, one end of the main liquid outlet channel is connected to the liquid outlet 105, and the other end of the main liquid outlet channel is respectively communicated with the plurality of direct current branch channels.

[0086] In a possible implementation, the direct current channels further include a plurality of direct current shunt channels, and the number of the direct current shunt channels is greater than the number of the direct current branch channels. Along the flow path direction, one end of each direct current branch channel far from the main liquid outlet channel is respectively communicated with one end of at least one direct current shunt channel, and the other end of each direct current shunt channel is respectively communicated with the turbulent flow channels.

[0087] In a possible implementation, the spacing between the flow channels is the distance between two adjacent flow channels in a direction perpendicular to the flow path. The spacing between the flow channels in the turbulent flow channel 102 is smaller than that in the straight flow channel 103, thereby improving the heat exchange efficiency in the turbulent flow channel 102.

[0088] In a possible implementation, the turbulent flow channel 102 is wavy along the flow direction of the heat exchange medium.

[0089] In other possible implementations, the turbulent flow channel 102 is serpentine, W-shaped, V-shaped, etc. along the flow direction of the heat exchange medium.

[0090] In addition, in other possible implementations, the turbulent flow channel can also be achieved by adding turbulence elements in a conventional straight channel or using methods such as flow splitting to enhance the heat exchange amount.

[0091] In a possible implementation, both the turbulent flow channel 102 and the straight flow channel 103 are S-shaped turning flow channels to improve the heat exchange effect.

[0092] Please also refer to Figure 4 , in a possible implementation, the first heat exchange region 10 and the second heat exchange region 20 are arranged side by side. The first heat exchange region 10 includes a first turbulent flow channel 11 and a first straight flow channel 12 that are connected and communicate with each other. The second heat exchange region 20 includes a second turbulent flow channel 21 and a second straight flow channel 22 that are connected and communicate with each other. As Figure 3 shown, along the second direction Y, the first turbulent flow channel 11 is arranged on the side of the first straight flow channel 12 away from the second heat exchange region 20, and the second turbulent flow channel 21 is arranged on the side of the second straight flow channel 22 away from the first heat exchange region 10, that is, the first turbulent flow channel 11 and the second turbulent flow channel 21 respectively correspond to both sides of the first battery module 203. The second direction Y is perpendicular to the first direction X.

[0093] By arranging the first heat exchange region 10 and the second heat exchange region 20 side by side, the first turbulent flow channel 11 and the second turbulent flow channel 21 respectively correspond to both sides of the first battery module 203, thereby exchanging heat for the locally overheated regions on both sides of the first battery module 203, reducing the maximum temperature of the first battery module 203, and at the same time reducing the overall temperature difference of the first battery module 203.

[0094] In a possible implementation, the first heat exchange region 10 further includes a first main inlet flow channel 111. The first turbulent flow channel 11 includes a plurality of first turbulent branch flow channels 112. Along the flow path direction, one end of the first main inlet flow channel 111 is connected to an inlet port 104, and the other end of the first main inlet flow channel 111 is respectively communicated with the plurality of first turbulent branch flow channels 112.

[0095] Optionally, the first spoiler branch channels 112 include two, and the other ends of the first liquid inlet main channel 111 are respectively communicated with the two first spoiler branch channels 112. That is, the heat exchange medium flowing out of the first liquid inlet main channel 111 is shunted into the two first spoiler branch channels 112.

[0096] Optionally, the two first spoiler branch channels 112 are arranged in parallel side by side.

[0097] In a possible implementation manner, the first spoiler channel 11 further includes a plurality of first spoiler shunt channels 113. The number of the first spoiler shunt channels 113 is greater than the number of the first spoiler branch channels 112. Along the flow path direction, the ends of the first spoiler branch channels 112 far from the first liquid inlet main channel 111 are respectively communicated with at least one first spoiler shunt channel 113.

[0098] Optionally, the first spoiler shunt channels 113 include four, and the other ends of each first spoiler branch channel 112 are respectively communicated with two of the first spoiler shunt channels 113. That is, the heat exchange medium flowing out of one first spoiler branch channel 112 is shunted into the two first spoiler shunt channels 113.

[0099] Optionally, the four first spoiler shunt channels 113 are arranged in parallel side by side.

[0100] In a possible implementation manner, the first heat exchange area 10 further includes a first liquid outlet main channel 121. The first direct flow channel 12 includes a plurality of first direct flow branch channels 122. Along the flow path direction, one end of the first liquid outlet main channel 121 is provided with a liquid outlet 105, and the other ends of the first liquid outlet main channel 121 are respectively communicated with the plurality of first direct flow branch channels 122.

[0101] Optionally, the first direct flow branch channels 122 include two, and the other ends of the first liquid outlet main channel 121 are respectively communicated with the two first direct flow branch channels 122. That is, the heat exchange medium flowing out of the two first direct flow branch channels 122 is merged into the first liquid outlet main channel 121.

[0102] Optionally, the two first direct flow branch channels 122 are arranged in parallel side by side.

[0103] In a possible implementation manner, the first direct flow channel 12 further includes a plurality of first direct flow shunt channels 123. The number of the first direct flow shunt channels 123 is greater than the number of the first direct flow branch channels 122. Along the flow path direction, the ends of the first direct flow branch channels 122 far from the first liquid outlet main channel 121 are respectively communicated with one end of at least one first direct flow shunt channel 123, and the other ends of the first direct flow shunt channels 123 are respectively communicated with the corresponding first spoiler shunt channels 113.

[0104] Optionally, there are four first direct current shunt channels 123, and the other end of each first direct current branch channel 122 is respectively communicated with two of the first direct current shunt channels 123. That is, the heat exchange medium flowing out of each first turbulent flow shunt channel 113 flows into a corresponding first direct current shunt channel 123, and the heat exchange medium flowing out of two first direct current shunt channels 123 is merged and enters a first direct current branch channel 122.

[0105] Optionally, the four first direct current shunt channels 123 are arranged in parallel side by side.

[0106] In a possible implementation manner, the heat exchange medium enters the first liquid inlet main channel 111 through the liquid inlet 104. The first liquid inlet main channel 111 is located outside the first heat exchange area 10 and is outside and close to the first battery module 203, and is branched into two first turbulent flow branch channels 112. The two first turbulent flow branch channels 112 are arranged in parallel to the tail of the first battery module 203 and are branched again to form four parallel first turbulent flow shunt channels 113. The four first turbulent flow shunt channels 113 flow towards the middle area of the first battery module 203 in an S-shaped turning form. In the middle area close to the first battery module 203, each of the four first turbulent flow shunt channels 113 is communicated with a first direct current shunt channel 123. The four first direct current shunt channels 123 flow towards the middle area of the first battery module 203 in an S-shaped turning form. After two first direct current shunt channels 123 are merged into one first direct current branch channel 122, the first direct current branch channel 122 is converged into one first liquid outlet main channel 121 and then flows out of the liquid outlet 105 in an S-shaped turning form.

[0107] Preferably, along the flowing direction of the heat exchange medium, the flow path spacing of the first turbulent flow branch channel 112 and the first turbulent flow shunt channel 113 is relatively narrow and presents a wavy flow. After multiple turning flows, the flow path spacing of the first turbulent flow shunt channel 113, the first direct current branch channel 122, and the first liquid outlet main channel 121 increases and presents a straight-line flow.

[0108] In a possible implementation manner, the second heat exchange area 20 further includes a second liquid inlet main channel 211. The second turbulent flow channel 21 includes a plurality of second turbulent flow branch channels 212. Along the flow path direction, one end of the second liquid inlet main channel 211 is connected to the liquid inlet 104, and the other end of the second liquid inlet main channel 211 is respectively communicated with the plurality of second turbulent flow branch channels 212.

[0109] Optionally, there are two second turbulent flow branch channels 212, and the other end of the second liquid inlet main channel 211 is respectively communicated with the two second turbulent flow branch channels 212. That is, the heat exchange medium flowing out of the second liquid inlet main channel 211 is branched into the two second turbulent flow branch channels 212.

[0110] Optionally, the two second turbulent flow branch channels 212 are arranged in parallel side by side.

[0111] In a possible implementation, the second spoiler flow channel 21 further includes a plurality of second spoiler diversion channels 213. The number of the second spoiler diversion channels 213 is greater than the number of the second spoiler branch channels 212. Along the flow path direction, one end of each second spoiler branch channel 212 away from the second main liquid inlet channel 211 is respectively communicated with at least one second spoiler diversion channel 213.

[0112] Optionally, there are four second spoiler diversion channels 213, and the other end of each second spoiler branch channel 212 is respectively communicated with two of the second spoiler diversion channels 213. That is, the heat exchange medium flowing out of one second spoiler branch channel 212 is diverted into two second spoiler diversion channels 213.

[0113] Optionally, the four second spoiler diversion channels 213 are arranged in parallel side by side.

[0114] In a possible implementation, the second heat exchange area 20 further includes a second main liquid outlet channel 221. The second direct flow channel 22 includes a plurality of second direct flow branch channels 222. Along the flow path direction, one end of the second main liquid outlet channel 221 is connected with a liquid outlet 105, and the other end of the second main liquid outlet channel 221 is respectively communicated with the plurality of second direct flow branch channels 222.

[0115] Optionally, there are two second direct flow branch channels 222, and the other end of the second main liquid outlet channel 221 is respectively communicated with the two second direct flow branch channels 222. That is, the heat exchange medium flowing out of the two second direct flow branch channels 222 is merged into the second main liquid outlet channel 221.

[0116] Optionally, the two second direct flow branch channels 222 are arranged in parallel side by side.

[0117] In a possible implementation, the second direct flow channel 22 further includes a plurality of second direct flow diversion channels 223. The number of the second direct flow diversion channels 223 is greater than the number of the second direct flow branch channels 222. Along the flow path direction, one end of each second direct flow branch channel 222 away from the second main liquid outlet channel 221 is respectively communicated with one end of at least one second direct flow diversion channel 223, and the other end of each second direct flow diversion channel 223 is respectively communicated with the corresponding second spoiler diversion channel 213.

[0118] Optionally, there are four second direct flow diversion channels 223, and the other end of each second direct flow branch channel 222 is respectively communicated with two of the second direct flow diversion channels 223. That is, the heat exchange medium flowing out of each second spoiler diversion channel 213 flows into a corresponding second direct flow diversion channel 223, and the heat exchange medium flowing out of the two second direct flow diversion channels 223 is merged into one second direct flow branch channel 222.

[0119] Optionally, the four second DC shunt channels 223 are arranged in parallel side by side.

[0120] In a possible implementation, the heat exchange medium enters the second main inlet channel 211 through the inlet 104. The second main inlet channel 211 is located outside the second heat exchange area 20, near the outside of the first battery module 203, and is divided into two second turbulent shunt channels 212. The two second turbulent shunt channels 212 are arranged in parallel to the tail of the first battery module 203 and are divided again to form four parallel second turbulent shunt channels 213. The four second turbulent shunt channels 213 flow in an S-shaped turning form to the middle area of the first battery module 203. Near the middle area of the first battery module 203, each of the four second turbulent shunt channels 213 is connected to a second DC shunt channel 223. The four second DC shunt channels 223 flow in an S-shaped turning form to the middle area of the first battery module 203. After two second DC shunt channels 223 merge into one second DC branch channel 222, the second DC branch channel 222 converges into one second main outlet channel 221 and then flows out of the outlet 105 in an S-shaped turning form.

[0121] Preferably, along the flow direction of the heat exchange medium, the channel spacing between the second turbulent shunt channel 212 and the second turbulent shunt channel 213 is narrow and shows a wavy flow. After multiple turning flows, the channel spacing of the second turbulent shunt channel 213, the second DC branch channel 222, and the second main outlet channel 221 increases and shows a linear flow.

[0122] In a possible implementation, the first heat exchange area 10 and the second heat exchange area 20 are symmetrically arranged.

[0123] In a possible implementation, the first turbulent flow channel 11 and the second turbulent flow channel 21 are symmetrically arranged, and / or the first DC flow channel 12 and the second DC flow channel 22 are symmetrically arranged.

[0124] The symmetry between the first heat exchange area 10 and the second heat exchange area 20 makes the flow behavior of the heat exchange medium in the two areas highly consistent and the flow uniformity strong, greatly improving the temperature uniformity of the first battery module 203 cooled by the heat exchange medium therein. In addition, in the wavy first turbulent flow channel 11 and the second turbulent flow channel 21 with increased channel density and enhanced disturbance on the two outer sides of the first battery module 203, under the condition of strengthening the cooling capacity, high cooling efficiency is obtained, further reducing the maximum temperature of the first battery module 203 and narrowing the overall temperature difference of the first battery module 203.

[0125] The heat exchange medium flows in from the outside of the heat exchange plate 100 and then converges and flows out through the middle channel.

[0126] The heat exchange plate 100 adopts a two-in-one-out mode, which avoids the problem of local overheating caused by uneven distribution of pipeline flow rate. Moreover, the flow channel has multiple shunt levels, which avoids the problem of large pressure loss caused by high flow velocity and small inner diameter of the flow channel, and effectively avoids the problem of large temperature change of the heat exchange medium and large temperature difference of the heat exchange plate 100 due to large change of working pressure.

[0127] By shunting multiple times to solve the problem of large pressure drop of the heat exchange plate 100, multiple parallel branches are arranged. The symmetry of the flow channel makes the branches have the same along-path, and some branches converge in advance, so that each branch has the same local resistance to ensure the same flow rate of each branch and ensure that the heat exchange plate 100 does not have local overheating.

[0128] Please also refer to Figure 5 , in a possible implementation, the third heat exchange area 30 and the fourth heat exchange area 40 are arranged side by side. And the third heat exchange area 30 is opposite to the first heat exchange area 10, and the fourth heat exchange area 40 is opposite to the second heat exchange area 20.

[0129] The third heat exchange area 30 includes a connected third turbulent flow channel 31 and a third direct flow channel 32. The fourth heat exchange area 40 includes a connected fourth turbulent flow channel 41 and a fourth direct flow channel 42. As Figure 3 shown, along the second direction Y, the third turbulent flow channel 31 is arranged on the side of the third direct flow channel 32 away from the fourth heat exchange area 40, and the fourth turbulent flow channel 41 is arranged on the side of the fourth direct flow channel 42 away from the third heat exchange area 30, that is, the third turbulent flow channel 31 and the fourth turbulent flow channel 41 respectively correspond to both sides of the second battery module 204.

[0130] By arranging the third heat exchange area 30 and the fourth heat exchange area 40 side by side, the third turbulent flow channel 31 and the fourth turbulent flow channel 41 respectively correspond to both sides of the second battery module 204, so as to exchange heat for the locally overheated areas on both sides of the second battery module 204, reduce the maximum temperature of the second battery module 204, and at the same time reduce the overall temperature difference of the second battery module 204.

[0131] In a possible implementation, the third heat exchange area 30 and the fourth heat exchange area 40 are located on the side of the first heat exchange area 10 and the second heat exchange area 20 away from the liquid inlet 104 and the liquid outlet 105, and the diameters of the flow channels in the third heat exchange area 30 and the fourth heat exchange area 40 are larger than the diameters of the flow channels in the first heat exchange area 10 and the second heat exchange area 20.

[0132] In order to offset the problem that the flow rates in different regions decrease successively due to the successive increase along the flow path in the front and rear regions, the diameters of the inlet and outlet flow channels of the main branch paths in each region need to increase successively to ensure that the flow rates of the heat exchange medium in different regions are the same, achieving a reasonable flow rate distribution in different regions and the uniformity of the cold plate flow field. Moreover, the widths of the flow channels in different regions are also different. The widths of the flow channels in the first heat exchange region 10 and the second heat exchange region 20 are narrower than those in the third heat exchange region 30 and the fourth heat exchange region 40. Since the first heat exchange region 10 and the second heat exchange region 20 are closer to the liquid inlet 104 and the liquid outlet 105, the flow path along the way is shorter. To regulate the uniformity of the pressure drop in the flow channels of the regions reasonably, the widths of the flow channels in the first heat exchange region 10 and the second heat exchange region 20 are narrower, that is, the diameters of the first heat exchange region 10 and the second heat exchange region 20 are smaller.

[0133] In a possible implementation manner, the third heat exchange region 30 further includes a third main liquid inlet channel 311. The third turbulence flow channel 31 includes a plurality of third turbulence branch channels 312. Along the flow path direction, one end of the third main liquid inlet channel 311 is connected to the liquid inlet 104, and the other end of the third main liquid inlet channel 311 is respectively communicated with a plurality of third turbulence branch channels 312.

[0134] Optionally, the third turbulence branch channels 312 include two, and the other end of the third main liquid inlet channel 311 is respectively communicated with the two third turbulence branch channels 312. That is, the heat exchange medium flowing out of the third main liquid inlet channel 311 is split and enters the two third turbulence branch channels 312.

[0135] Optionally, the two third turbulence branch channels 312 are arranged in parallel side by side.

[0136] In a possible implementation manner, the third turbulence flow channel 31 further includes a plurality of third turbulence diversion channels 313. The number of the third turbulence diversion channels 313 is greater than the number of the third turbulence branch channels 312. Along the flow path direction, one end of the third turbulence branch channel 312 away from the third main liquid inlet channel 311 is respectively communicated with at least one third turbulence diversion channel 313.

[0137] Optionally, the third turbulence diversion channels 313 include four, and the other end of each third turbulence branch channel 312 is respectively communicated with two of the third turbulence diversion channels 313. That is, the heat exchange medium flowing out of one third turbulence branch channel 312 is split and enters the two third turbulence diversion channels 313.

[0138] Optionally, the four third turbulence diversion channels 313 are arranged in parallel side by side.

[0139] In a possible implementation, the third heat exchange region 30 further includes a third main liquid outlet channel 321. The third direct flow channel 32 includes a plurality of third direct flow branch channels 322. Along the flow path direction, one end of the third main liquid outlet channel 321 is connected to a liquid outlet 105, and the other end of the third main liquid outlet channel 321 is respectively communicated with the plurality of third direct flow branch channels 322.

[0140] Optionally, the third direct flow branch channels 322 include two, and the other end of the third main liquid outlet channel 321 is respectively communicated with the two third direct flow branch channels 322. That is, the heat exchange medium flowing out from the two third direct flow branch channels 322 is merged into the third main liquid outlet channel 321.

[0141] Optionally, the two third direct flow branch channels 322 are arranged in parallel side by side.

[0142] In a possible implementation, the third direct flow channel 32 further includes a plurality of third direct flow dividing channels 323. The number of the third direct flow dividing channels 323 is greater than the number of the third direct flow branch channels 322. Along the flow path direction, one end of each third direct flow branch channel 322 far from the third main liquid outlet channel 321 is respectively communicated with one end of at least one third direct flow dividing channel 323, and the other end of each third direct flow dividing channel 323 is respectively communicated with the corresponding third turbulent flow dividing channel 313.

[0143] Optionally, the third direct flow dividing channels 323 include four, and the other end of each third direct flow branch channel 322 is respectively communicated with two of the third direct flow dividing channels 323. That is, the heat exchange medium flowing out from each third turbulent flow dividing channel 313 flows into a corresponding third direct flow dividing channel 323, and the heat exchange medium flowing out from the two third direct flow dividing channels 323 is merged into one third direct flow branch channel 322.

[0144] Optionally, the four third direct flow dividing channels 323 are arranged in parallel side by side.

[0145] In a possible implementation, the heat exchange medium enters the third main inlet channel 311 through the liquid inlet 104. The third main inlet channel 311 is located outside the first heat exchange area 10. Near the outside of the first heat exchange area 10, it is branched into two third turbulent flow branch channels 312. The two third turbulent flow branch channels 312 are arranged in parallel and branched again at the tail of the second battery module 204 to form four parallel third turbulent flow diversion channels 313. The four third turbulent flow diversion channels 313 flow towards the middle area of the second battery module 204 in an S-shaped turning form. Near the middle area of the second battery module 204, each of the four third turbulent flow diversion channels 313 is connected to a third direct current diversion channel 323. The four third direct current diversion channels 323 flow towards the middle area of the second battery module 204 in an S-shaped turning form. After two third direct current diversion channels 323 merge into one third direct current branch channel 322, the third direct current branch channel 322 converges into a third main outlet channel 321 and then flows out to the liquid outlet 105 in an S-shaped turning form, and converges with the first main outlet channel 121 to flow out of the liquid outlet 105.

[0146] Preferably, along the flow direction of the heat exchange medium, the channel spacing between the third turbulent flow branch channels 312 and the third turbulent flow diversion channels 313 is narrow and shows a wavy flow. After multiple turning flows, the channel spacing of the third turbulent flow diversion channels 313, the third direct current branch channel 322, and the third main outlet channel 321 increases and shows a linear flow.

[0147] Optionally, since the area of the second battery module 204 that needs to be cooled in the third heat exchange area 30 is larger, the wavy third turbulent flow channel 31 area is larger.

[0148] In a possible implementation, the fourth heat exchange area 40 further includes a fourth main inlet channel 411. The fourth turbulent flow channel 41 includes a plurality of fourth turbulent flow branch channels 412. Along the flow path, one end of the fourth main inlet channel 411 is connected to the liquid inlet 104, and the other end of the fourth main inlet channel 411 is respectively connected to the plurality of fourth turbulent flow branch channels 412.

[0149] Optionally, the fourth turbulent flow branch channels 412 include two, and the other end of the fourth main inlet channel 411 is respectively connected to the two fourth turbulent flow branch channels 412. That is, the heat exchange medium flowing out of the fourth main inlet channel 411 is branched into the two fourth turbulent flow branch channels 412.

[0150] Optionally, the two fourth turbulent flow branch channels 412 are arranged in parallel side by side.

[0151] In a possible implementation, the fourth spoiler flow channel 41 further includes a plurality of fourth spoiler shunt channels 413. The number of the fourth spoiler shunt channels 413 is greater than the number of the fourth spoiler branch channels 412. Along the flow path direction, one end of each fourth spoiler branch channel 412 away from the fourth inlet main channel 411 is respectively communicated with at least one fourth spoiler shunt channel 413.

[0152] Optionally, there are four fourth spoiler shunt channels 413, and the other end of each fourth spoiler branch channel 412 is respectively communicated with two of the fourth spoiler shunt channels 413. That is, the heat exchange medium flowing out of one fourth spoiler branch channel 412 is shunted into two fourth spoiler shunt channels 413.

[0153] Optionally, the four fourth spoiler shunt channels 413 are arranged in parallel side by side.

[0154] In a possible implementation, the fourth heat exchange area 40 further includes a fourth outlet main channel 421. The fourth direct flow channel 42 includes a plurality of fourth direct flow branch channels 422. Along the flow path direction, one end of the fourth outlet main channel 421 is connected with an outlet 105, and the other end of the fourth outlet main channel 421 is respectively communicated with the plurality of fourth direct flow branch channels 422.

[0155] Optionally, there are two fourth direct flow branch channels 422, and the other end of the fourth outlet main channel 421 is respectively communicated with the two fourth direct flow branch channels 422. That is, the heat exchange medium flowing out of the two fourth direct flow branch channels 422 is confluent into the fourth outlet main channel 421.

[0156] Optionally, the two fourth direct flow branch channels 422 are arranged in parallel side by side.

[0157] In a possible implementation, the fourth direct flow channel 42 further includes a plurality of fourth direct flow shunt channels 423. The number of the fourth direct flow shunt channels 423 is greater than the number of the fourth direct flow branch channels 422. Along the flow path direction, one end of each fourth direct flow branch channel 422 away from the fourth outlet main channel 421 is respectively communicated with one end of at least one fourth direct flow shunt channel 423, and the other end of each fourth direct flow shunt channel 423 is respectively communicated with the corresponding fourth spoiler shunt channel 413.

[0158] Optionally, there are four fourth direct flow shunt channels 423, and the other end of each fourth direct flow branch channel 422 is respectively communicated with two of the fourth direct flow shunt channels 423. That is, the heat exchange medium flowing out of each fourth spoiler shunt channel 413 flows into a corresponding fourth direct flow shunt channel 423, and the heat exchange medium flowing out of the two fourth direct flow shunt channels 423 is confluent into one fourth direct flow branch channel 422.

[0159] Optionally, the four fourth direct flow shunt channels 423 are arranged in parallel side by side.

[0160] In a possible implementation, the heat exchange medium enters the fourth inlet main flow channel 411 through the liquid inlet 104. The fourth inlet main flow channel 411 is located outside the second heat exchange area 20. Near the outside of the second heat exchange area 20, it is divided into two fourth turbulent flow branch channels 412. The two fourth turbulent flow branch channels 412 are arranged in parallel to the tail of the second battery module 204 and are further divided. Four parallel fourth turbulent flow split channels 413 are formed. The four fourth turbulent flow split channels 413 flow towards the middle area of the second battery module 204 in an S-shaped turning form. Near the middle area of the second battery module 204, each of the four fourth turbulent flow split channels 413 is connected to a fourth direct current split channel 423. The four fourth direct current split channels 423 flow towards the middle area of the second battery module 204 in an S-shaped turning form. After two fourth direct current split channels 423 merge into one fourth direct current branch channel 422, the fourth direct current branch channel 422 converges into a single fourth outlet main flow channel 421 and then flows out to the liquid outlet 105 in an S-shaped turning form, and converges with the second outlet main flow channel 221 to flow out of the liquid outlet 105.

[0161] Preferably, along the flow direction of the heat exchange medium, the channel spacing between the fourth turbulent flow branch channel 412 and the fourth turbulent flow split channel 413 is narrow and shows a wavy flow. After multiple turning flows, the channel spacing of the fourth turbulent flow split channel 413, the fourth direct current branch channel 422, and the fourth outlet main flow channel 421 increases and shows a straight-line flow.

[0162] Optionally, since the area of the second battery module 204 that needs to be cooled in the third heat exchange area 30 is larger, the wavy fourth turbulent flow channel 41 area is larger.

[0163] In a possible implementation, the third heat exchange area 30 and the fourth heat exchange area 40 are symmetrically arranged.

[0164] In a possible implementation, the third turbulent flow channel 31 and the fourth turbulent flow channel 41 are symmetrically arranged, and / or the third direct current channel 32 and the fourth direct current channel 42 are symmetrically arranged.

[0165] The symmetry between the third heat exchange area 30 and the fourth heat exchange area 40 makes the flow behavior of the heat exchange medium in the two areas highly consistent, and greatly improves the temperature uniformity of the second battery module 204 cooled by the heat exchange medium therein. In addition, in the wavy third turbulent flow channel 31 and the fourth turbulent flow channel 41 where the high-power heat exchange areas on both outer sides of the second battery module 204 are strengthened in perturbation and the channel density is increased to enhance the cooling capacity, high-efficiency cooling performance is obtained, further reducing the maximum temperature of the second battery module 204 and narrowing the overall temperature difference of the second battery module 204.

[0166] In a possible implementation, in multiple heat exchange regions 101, the ratio of the areas of the flow channels in each heat exchange region 101 to the areas of the flow channels in another heat exchange region 101 is the same. For example, in the first heat exchange region 10 and the second heat exchange region 20, the area of the first turbulent flow channel 11 in the first heat exchange region 10: the area of the second turbulent flow channel 21 in the second heat exchange region 20 is equal to the area of the first straight flow channel 12 in the first heat exchange region 10: the area of the second straight flow channel 22 in the second heat exchange region 20, and is also equal to the area of the first turbulent flow channel 11 in the first heat exchange region 10: the area of the second straight flow channel 22 in the second heat exchange region 20.

[0167] In a possible implementation, the number of turbulent flow channels 102 in each heat exchange region 101 is an even number, that is, the numbers of turbulent branch channels and turbulent shunt channels are even numbers respectively.

[0168] The branch flow distribution within each region and the internal flow distribution within the branch realize the flow rate distribution of the heat exchange medium, greatly reducing the pressure drop and reducing the pump power consumed by the system. The symmetrical region layout makes the flow rate ratios in the flow channels of each region uniform, effectively realizing the thermal management of the batteries in the middle and on both sides of the battery module, reducing the temperature difference of the entire battery pack 201, and optimizing the temperature uniformity of the entire pack. At the same time, the rational arrangement of the density of the turbulent flow channels 102 and the flow channels on the outer sides of each region strengthens the heat exchange performance of the local region and reduces the highest temperature of the battery 201.

[0169] As Figure 2 shown, in a possible implementation, the heat exchange plate 100 includes a flow channel plate 50, a temperature equalizing plate 60, an inlet connector 70, and an outlet connector 80. The flow channel plate 50 is connected to the temperature equalizing plate 60, and a turbulent flow channel 102 and a straight flow channel 103 are formed between the flow channel plate 50 and the temperature equalizing plate 60. The inlet connector 70 is connected to the inlet port 104, and the outlet connector 80 is connected to the outlet port 105.

[0170] In a possible implementation, the inlet connector 70 and the outlet connector 80 are located on the same side of the heat exchange plate 100.

[0171] In a possible implementation, the inlet connector 70 and the outlet connector 80 are located on the side of the first battery module 203 away from the second battery module 204 and in the middle of the first battery module 203. The inlet connector 70 is respectively communicated with the inlet ports 104 on both sides of the outlet port 105. The outlet connector 80 is communicated with the middle outlet port 105.

[0172] Preferably, the inlet connector 70 and the outlet connector 80 are set as an integral structure, reducing the installation of components, improving the space utilization rate, being beneficial to further improving the energy density of the battery pack 200, and at the same time reducing consumables and saving costs.

[0173] In a possible implementation, the heat exchange plate 100 is made of aluminum alloy stamping profiles. The flow channel plate 50 and the heat spreader 60 are connected by brazing.

[0174] The heat exchange plate 100 formed by stamping has the functions of cooling and heating, and also has the function of supporting the battery 201.

[0175] By adopting partitioned flow, adding a turbulator flow channel 102 for flow disturbance, variable density flow channels, and designing the symmetry and uniformity of the flow channels, by changing the flow channel spacing, setting reasonable variable density flow channels, and adding the turbulator flow channel 102 structure on this basis to strengthen the fluid disturbance in the high-temperature area of the battery 201, a reasonable sub-region flow distribution and effective sub-region cooling capacity layout are achieved, avoiding local overheating, reducing the maximum temperature of the battery 201, and improving the temperature uniformity of the battery 201. The outlets of the branches are all located in the middle part of the battery 201, avoiding the superposition effect of local overheating caused by the system and the high heat generation area of the battery 201.

[0176] The heat exchange plate 100 provided by the embodiment of the present application includes a plurality of heat exchange regions 101. The heat exchange region 101 includes a turbulator flow channel 102 and a straight flow channel 103 that are connected and communicated. One end of the turbulator flow channel 102 far from the straight flow channel 103 is provided with a liquid inlet 104 for the heat exchange medium to flow in, and one end of the straight flow channel 103 far from the turbulator flow channel 102 is provided with a liquid outlet 105 for the heat exchange medium to flow out.

[0177] By dividing the heat exchange plate 100 into a plurality of heat exchange regions 101, and dividing each heat exchange region 101 into two parts, namely a turbulator flow channel 102 and a straight flow channel 103 that are connected and communicated, the turbulator flow channel 102 can strengthen the disturbance of the heat exchange medium, enhance the heat exchange capacity, and by feeding the liquid through the turbulator flow channel 102 and discharging the liquid through the straight flow channel 103, the heat exchange effect of the turbulator flow channel 102 can be higher than that of the straight flow channel 103. Thus, the heat exchange of the local over-temperature area in the battery pack 200 can be strengthened through the turbulator flow channel 102, the maximum temperature of the battery 201 can be reduced, at the same time, the overall temperature difference of the battery 201 is reduced, the temperature uniformity of the battery pack 200 is improved, the energy efficiency of the battery pack 200 is increased, and the service life of the battery pack 200 is extended.

[0178] In addition, the embodiment of the present application also provides a battery pack 200, including a battery 201 and the above-mentioned heat exchange plate 100. The heat exchange plate 100 is attached to the battery 201 for cooling and / or heating the battery 201.

[0179] In a possible implementation, the battery has a first region and a second region. Among them, the battery has a first region and a second region, and the heat generation of the battery part corresponding to the second region is greater than that of the battery part corresponding to the first region. The turbulent flow channel corresponds to the second region of the battery, and the direct current flow channel corresponds to the first region of the battery. Through the above settings, the heat exchange medium can first exchange heat with the battery region with a higher temperature, and then exchange heat with the battery region with a lower temperature, which can further improve the heat exchange effect on the battery and reduce the temperature difference of the overall battery.

[0180] In a possible implementation, a plurality of batteries 201 are arranged in sequence along the thickness direction of the battery 201. The battery 201 includes a first region in the middle and second regions on both sides. The turbulent flow channel 102 corresponds to the second regions of the plurality of batteries 201, and the direct current flow channel 103 corresponds to the first regions of the plurality of batteries 201.

[0181] In a possible implementation, a terminal post is provided on the second region of the battery. Specifically, since the terminal post is connected to an external power supply or load, the heat generation at the battery terminal post is more serious than other positions. Therefore, a terminal post is provided on the second region of the battery to improve the heat exchange effect on this part. Further, the terminal posts of the battery can be provided on both sides along its length direction. At this time, the battery 201 includes a first region in the middle and second regions on both sides. The turbulent flow channel 102 corresponds to the second regions of the plurality of batteries 201, and the direct current flow channel 103 corresponds to the first regions of the plurality of batteries 201.

[0182] In a possible implementation, a plurality of batteries 201 are divided into at least two battery groups arranged in sequence. The heat generation of one battery group is greater than that of the other battery group. The area of the turbulent flow channel 102 of the heat exchange region 101 corresponding to one battery group is greater than the area of the turbulent flow channel 102 of the heat exchange region 101 corresponding to the other battery group.

[0183] The embodiment of the present application further provides an electrical device, including an electrical device and the battery pack 200 described in any of the above embodiments. The battery pack 200 is used to provide electrical energy for the electrical device.

[0184] The electrical device in the embodiment of the present application can be a vehicle. For example, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Correspondingly, the electrical device can be a driving mechanism of the vehicle or a control system of the vehicle.

[0185] In addition, the electrical device can also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecrafts, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles or spaceships.

[0186] Since the electrical device in this embodiment includes the battery pack 200 described in any of the above embodiments, the electrical device includes the structure and beneficial effects of the battery pack 200, and thus will not be elaborated herein again in this embodiment.

[0187] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat exchange plate, characterized in that, Comprising: A heat exchange area (101), the heat exchange area (101) comprising a turbulator flow channel (102) and a straight-through flow channel (103) which are in communication with each other; Along the flow path direction, one end of the turbulator flow channel (102) away from the straight-through flow channel (103) is connected to a liquid inlet (104) for the heat exchange medium to flow in, and one end of the straight-through flow channel (103) away from the turbulator flow channel (102) is connected to a liquid outlet (105) for the heat exchange medium to flow out.

2. The heat exchange plate according to claim 1, wherein The heat exchange area (101) further comprises a main liquid inlet flow channel, the turbulator flow channel comprises a plurality of turbulator branch flow channels, and along the flow path direction, one end of the main liquid inlet flow channel is connected to the liquid inlet (104), and the other end of the main liquid inlet flow channel is respectively in communication with the plurality of turbulator branch flow channels.

3. The heat exchange plate according to claim 2, wherein, The turbulator flow channel further comprises a plurality of turbulator diverging flow channels, the number of the turbulator diverging flow channels is greater than the number of the turbulator branch flow channels, and along the flow path direction, one end of the turbulator branch flow channel away from the main liquid inlet flow channel is respectively in communication with at least one of the turbulator diverging flow channels.

4. The heat exchange plate according to claim 1, characterized in that The heat exchange area (101) further comprises a main liquid outlet flow channel, the straight-through flow channel comprises a plurality of straight-through branch flow channels, and along the flow path direction, one end of the main liquid outlet flow channel is connected to the liquid outlet (105), and the other end of the main liquid outlet flow channel is respectively in communication with the plurality of straight-through branch flow channels.

5. The heat exchange plate according to claim 4, wherein The straight-through flow channel further comprises a plurality of straight-through diverging flow channels, the number of the straight-through diverging flow channels is greater than the number of the straight-through branch flow channels, and along the flow path direction, one end of the straight-through branch flow channel away from the main liquid outlet flow channel is respectively in communication with one end of at least one of the straight-through diverging flow channels, and the other end of the straight-through diverging flow channel is respectively in communication with the turbulator flow channel.

6. The heat exchange plate according to any one of claims 1-5, characterized in that, The heat exchange area (101) comprises a first heat exchange area (10) and a second heat exchange area (20), and the first heat exchange area (10) and the second heat exchange area (20) are arranged side by side; The first heat exchange area (10) comprises a first turbulator flow channel (11) and a first straight-through flow channel (12) which are in communication with each other, and the second heat exchange area (20) comprises a second turbulator flow channel (21) and a second straight-through flow channel (22) which are in communication with each other; The first turbulator flow channel (11) is arranged on a side of the first straight-through flow channel (12) away from the second heat exchange area (20), and the second turbulator flow channel (21) is arranged on a side of the second straight-through flow channel (22) away from the first heat exchange area (10).

7. The heat exchange plate according to claim 6, wherein, The first heat exchange area (10) further comprises a first main liquid inlet flow channel (111), the first turbulator flow channel (11) comprises a plurality of first turbulator branch flow channels (112), and along the flow path direction, one end of the first main liquid inlet flow channel (111) is connected to the liquid inlet (104), and the other end of the first main liquid inlet flow channel (111) is respectively in communication with the plurality of first turbulator branch flow channels (112).

8. The heat exchange plate according to claim 7, characterized in that, The first spoiler flow channel (11) further includes a plurality of first spoiler branch channels (113), the number of the first spoiler branch channels (113) being greater than the number of the first spoiler tributary channels (112). Along the flow path direction, one end of each of the first spoiler tributary channels (112) away from the first liquid inlet main channel (111) is respectively communicated with at least one of the first spoiler branch channels (113).

9. The heat exchange plate according to claim 8, characterized in that, The first heat exchange region (10) further includes a first liquid outlet main channel (121). The first direct flow channel (12) includes a plurality of first direct flow tributary channels (122). Along the flow path direction, one end of the first liquid outlet main channel (121) is provided with the liquid outlet (105), and the other end of the first liquid outlet main channel (121) is respectively communicated with the plurality of first direct flow tributary channels (122).

10. The heat exchange plate according to claim 9, characterized in that, The first direct flow channel (12) further includes a plurality of first direct flow branch channels (123), the number of the first direct flow branch channels (123) being greater than the number of the first direct flow tributary channels (122). Along the flow path direction, one end of each of the first direct flow tributary channels (122) away from the first liquid outlet main channel (121) is respectively communicated with one end of at least one of the first direct flow branch channels (123), and the other end of each of the first direct flow branch channels (123) is respectively communicated with the corresponding first spoiler branch channel (113).

11. The heat exchange plate according to claim 6, characterized in that, The first heat exchange region (10) and the second heat exchange region (20) are symmetrically arranged, and / or the first spoiler flow channel (11) and the second spoiler flow channel (21) are symmetrically arranged, and / or the first direct flow channel (12) and the second direct flow channel (22) are symmetrically arranged.

12. The heat exchange plate according to any one of claims 1-5, characterized in that, The plurality of heat exchange regions (101) are divided into at least two groups arranged in sequence along a first direction, each group including two of the heat exchange regions (101) arranged side by side. In the two heat exchange regions (101) of each group, the spoiler flow channel (102) of one of the heat exchange regions (101) is arranged on a side of the direct flow channel (103) of this heat exchange region (101) away from the other heat exchange region (101), wherein the first direction is perpendicular to the arrangement direction of the two side-by-side arranged heat exchange regions (101) in the same group.

13. The heat exchange plate according to claim 12, characterized in that, The heat exchange region (101) includes a first heat exchange region (10), a second heat exchange region (20), a third heat exchange region (30), and a fourth heat exchange region (40). The first heat exchange region (10) and the second heat exchange region (20) are arranged side by side. The third heat exchange region (30) and the fourth heat exchange region (40) are arranged side by side, and the third heat exchange region (30) is opposite to the first heat exchange region (10), and the fourth heat exchange region (40) is opposite to the second heat exchange region (20). The third heat exchange area (30) includes a third turbulent flow channel (31) and a third straight flow channel (32) that are connected and communicate with each other. The fourth heat exchange area (40) includes a fourth turbulent flow channel (41) and a fourth straight flow channel (42) that are connected and communicate with each other. The third turbulent flow channel (31) is disposed on a side of the third straight flow channel (32) away from the fourth heat exchange area (40). The fourth turbulent flow channel (41) is disposed on a side of the fourth straight flow channel (42) away from the third heat exchange area (30).

14. The heat exchange plate according to claim 13, characterized in that, The third heat exchange area (30) further includes a third main liquid inlet channel (311). The third turbulent flow channel (31) includes a plurality of third turbulent flow branch channels (312). Along the flow path direction, one end of the third main liquid inlet channel (311) is connected to the liquid inlet (104), and the other end of the third main liquid inlet channel (311) communicates with the plurality of third turbulent flow branch channels (312) respectively.

15. The heat exchange plate according to claim 14, wherein, The third turbulent flow channel (31) further includes a plurality of third turbulent flow diversion channels (313). The number of the third turbulent flow diversion channels (313) is greater than the number of the third turbulent flow branch channels (312). Along the flow path direction, one end of the third turbulent flow branch channel (312) away from the third main liquid inlet channel (311) communicates with at least one of the third turbulent flow diversion channels (313) respectively.

16. The heat exchange plate according to claim 15, characterized in that, The third heat exchange area (30) further includes a third main liquid outlet channel (321). The third straight flow channel (32) includes a plurality of third straight flow branch channels (322). Along the flow path direction, one end of the third main liquid outlet channel (321) is provided with the liquid outlet (105), and the other end of the third main liquid outlet channel (321) communicates with the plurality of third straight flow branch channels (322) respectively.

17. The heat exchange plate according to claim 16, wherein, The third straight flow channel (32) further includes a plurality of third straight flow diversion channels (323). The number of the third straight flow diversion channels (323) is greater than the number of the third straight flow branch channels (322). Along the flow path direction, one end of the third straight flow branch channel (322) away from the third main liquid outlet channel (321) communicates with one end of at least one of the third straight flow diversion channels (323) respectively, and the other end of the third straight flow diversion channels (323) communicates with the corresponding third turbulent flow diversion channels (313) respectively.

18. The heat exchange plate according to claim 13, characterized in that, The third heat exchange area (30) and the fourth heat exchange area (40) are located on a side of the first heat exchange area (10) and the second heat exchange area (20) away from the liquid inlet (104) and the liquid outlet (105). The diameters of the flow channels in the third heat exchange area (30) and the fourth heat exchange area (40) are greater than the diameters of the flow channels in the first heat exchange area (10) and the second heat exchange area (20).

19. The heat exchange plate according to claim 13, characterized in that, The third heat exchange area (30) and the fourth heat exchange area (40) are symmetrically arranged, and / or the third turbulent flow channel (31) and the fourth turbulent flow channel (41) are symmetrically arranged, and / or the third straight flow channel (32) and the fourth straight flow channel (42) are symmetrically arranged.

20. The heat exchange plate according to claim 12, wherein, Along the first direction, the area of the turbulent flow channels (102) in a group of the heat exchange regions (101) close to the liquid inlet (104) is smaller than the area of the turbulent flow channels (102) in another group of the heat exchange regions (101) far from the liquid inlet (104).

21. The heat exchange plate according to claim 1, characterized in that, The spacing between the channels in the turbulent flow channels (102) is smaller than the spacing between the channels in the straight flow channels (103).

22. The heat exchange plate according to claim 1, wherein Along the flow direction of the heat exchange medium, the turbulent flow channels (102) are wavy.

23. The heat exchange plate according to claim 1, characterized in that, The turbulent flow channels (102) and the straight flow channels (103) are S-shaped turning flow channels.

24. The heat exchange plate according to claim 1, wherein, The heat exchange plate (100) includes a flow channel plate (50), a temperature equalizing plate (60), a liquid inlet joint (70), and a liquid outlet joint (80). The flow channel plate (50) is connected to the temperature equalizing plate (60). The turbulent flow channels (102) and the straight flow channels (103) are formed between the flow channel plate (50) and the temperature equalizing plate (60). The liquid inlet joint (70) is connected to the liquid inlet (104), and the liquid outlet joint (80) is connected to the liquid outlet (105).

25. The heat exchange plate according to claim 24, wherein, The liquid inlet joint (70) and the liquid outlet joint (80) are located on the same side of the heat exchange plate (100).

26. The heat exchange plate according to claim 1, characterized in that, In multiple heat exchange regions (101), the ratio of the area of each flow channel in each heat exchange region (101) to the area of each flow channel in another heat exchange region (101) is the same.

27. The heat exchange plate according to claim 1, characterized in that, The number of the turbulent flow channels (102) in each heat exchange region (101) is an even number.

28. A battery pack, characterized in that, It includes multiple batteries (201) and the heat exchange plate (100) according to any one of claims 1-27. The heat exchange plate (100) is attached to the battery (201) for cooling and / or heating the battery (201).

29. The battery pack according to claim 28, characterized in that, The battery has a first region and a second region. Among them, the heat generation amount of the battery part corresponding to the second region is greater than that of the battery part corresponding to the first region. The turbulent flow channels (102) correspond to the second region of the battery (201), and the straight flow channels (103) correspond to the first region of the battery (201).

30. The battery pack according to claim 29, wherein, Multiple batteries (201) are arranged in sequence along the thickness direction of the battery (201). The battery (201) includes a first region in the middle and second regions on both sides. The turbulent flow channels (102) correspond to the second regions of the multiple batteries (201), and the straight flow channels (103) correspond to the first regions of the multiple batteries (201).

31. The battery pack according to claim 29 or 30, characterized in that, Pole posts are provided on the second region of the battery.

32. The battery pack according to claim 28, wherein, The multiple batteries (201) are divided into at least two battery groups arranged in sequence. The heat generation amount of one battery group is greater than that of another battery group. The area of the turbulent flow channels (102) in the heat exchange region (101) corresponding to one battery group is greater than the area of the turbulent flow channels (102) in the heat exchange region (101) corresponding to another battery group.

33. An electrical device, characterized in that, Comprising an electrical device and a battery pack (200) as claimed in any one of claims 28-32, the battery pack (200) being configured to supply electrical energy to the electrical device.

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