Battery pack heat exchange structure, battery pack shell and battery pack

Abstract

The utility model provides a battery pack heat exchange structure, a battery pack shell and a battery pack. The heat exchange structure of the battery pack comprises an open shell main body, wherein the shell main body comprises a bottom plate, an end plate, a water inlet side plate and a water outlet side plate. The water inlet side plate comprises a water inlet runner plate and a water inlet liquid distribution plate, a water inlet runner cavity is formed in the water inlet runner plate in a stamping mode, and a plurality of water inlet liquid distribution holes are distributed in the water inlet liquid distribution plate. The water outlet side plate comprises a water outlet runner plate and a water outlet liquid distribution plate, a water outlet runner cavity is formed in the water outlet runner plate in a stamping mode, and a plurality of water outlet liquid distribution holes are distributed in the water outlet liquid distribution plate. The LED lamp has the advantages of being high in heat dissipation efficiency and low in machining and storage difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of immersed battery packs, and in particular to a heat exchange structure of a battery pack.

[0002] The utility model also relates to a battery pack housing and a battery pack including the battery pack heat exchange structure. Background Art

[0003] Immersed battery packs, also known as fully immersed battery packs, are energy storage structures used in electric vehicles and other high-energy storage devices. This technology achieves efficient heat dissipation by completely immersing the heating parts of the battery in a specific cooling medium (such as non-conductive liquids, fluorinated liquids, synthetic esters, mineral oils or water-based solutions, etc.), thereby optimizing the working conditions of the battery pack and improving the performance and service life of the battery pack.

[0004] Most immersed battery packs use aluminum profile shells, with the shell cavity and foam pads filled between the battery cells as the main body, forming a channel for the circulation of coolant. However, the shape of the coolant flow channel of the battery pack with this structure is relatively simple, and the cooling effect is relatively limited, which will have a negative impact on the overall temperature performance and service life of the battery pack.

[0005] In the prior art, there are related literature reports on technical solutions for improving the heat dissipation efficiency of immersed battery packs. For example, special-shaped foam cotton and other materials are filled between the battery cells to form a special shape of coolant flow channel, thereby achieving the purpose of improving heat dissipation efficiency. However, this structure will not only occupy the space in the battery pack, but also make processing, transportation and storage more difficult. Utility Model Content

[0006] In view of this, the utility model aims to propose a battery pack heat exchange structure, which can improve the heat dissipation efficiency of the immersed battery pack, and compared with the structure in the prior art, it has the characteristics of occupying less space and being easy to process, transport and store.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A battery pack heat exchange structure of the utility model includes:

[0009] A shell body, wherein the top of the shell body is open and a storage space suitable for accommodating a battery pack is defined in the shell body;

[0010] The shell body includes a bottom plate, a pair of end plates fixedly connected to one opposite side of the bottom plate, and an inlet side plate and an outlet side plate fixedly connected to the other opposite side of the bottom plate;

[0011] The water inlet side plate includes a water inlet channel plate and a water inlet liquid distribution plate; a water inlet channel cavity recessed in the inner surface of the water inlet channel plate is formed on the water inlet channel plate by stamping; a plurality of water inlet liquid distribution holes are distributed on the water inlet liquid distribution plate; the water inlet liquid distribution plate is fixedly sealed on the inner surface of the water inlet channel plate to form a connection between the water inlet channel cavity and the plurality of water inlet liquid distribution holes; a liquid inlet is provided on the water inlet channel plate in the path where the water inlet channel cavity passes;

[0012] The water outlet side plate includes a water outlet channel plate and a water outlet liquid distribution plate; a water outlet channel cavity recessed in the inner surface of the water outlet channel plate is formed on the water outlet channel plate by stamping; a plurality of water outlet liquid distribution holes are distributed on the water outlet liquid distribution plate; the water outlet liquid distribution plate is fixedly sealed on the inner surface of the water outlet channel plate to form a connection between the water outlet channel cavity and the plurality of water outlet liquid distribution holes; a liquid outlet is provided on the water outlet channel plate in the path through which the water outlet channel cavity passes.

[0013] Furthermore, the water inlet channel plate, the bottom plate and the water outlet channel plate are constructed in a "J" shape that is formed by bending after integral molding.

[0014] Furthermore, a flange bent outward is formed on the top of the shell body to support an upper cover sealed on the top of the shell body.

[0015] Furthermore, a convex rib protruding upward is stamped on the bottom plate to support the battery pack accommodated in the accommodating space.

[0016] Furthermore, the convex rib is extended between the two end plates, and the convex rib is configured as two parallel and spaced apart; an explosion-proof valve is provided on at least one of the end plates, and the explosion-proof valve is correspondingly located in the spacing area between the two convex ribs.

[0017] Furthermore, the convex rib is constructed in a "Ⅱ" shape.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The heat exchange structure of the battery pack described in the utility model, wherein a shell body with an open opening is provided to form a space capable of accommodating a battery pack, which plays a role of limiting and supporting the battery pack. The shell body is composed of a bottom plate, a pair of end plates, a water inlet side plate and a water outlet side plate. The water inlet side plate is fixedly connected by a water inlet channel plate and a water inlet liquid distribution plate, and the water outlet side plate is fixedly connected by a water outlet channel plate and a water outlet liquid distribution plate. The coolant flows in from the water inlet channel cavity formed by stamping on the water inlet liquid distribution plate, flows into the gap between the battery packs through the water inlet liquid distribution holes on the water inlet liquid distribution plate, and then flows into the water outlet channel cavity stamped on the water outlet channel plate from the water outlet liquid distribution holes. The above structure forms a coolant flow channel with a relatively complex shape and a good cooling effect, which can significantly improve the heat dissipation efficiency of the immersion battery pack. The water inlet channel cavity and the water outlet channel cavity on the shell body are both made by stamping and forming in one piece, with simple processing technology and assembly process, less space occupied in the battery pack, and easier to store and transport.

[0020] In addition, by integrally forming the water inlet channel plate, the bottom plate and the water outlet channel plate and bending them into a "J" shape, the number of welds on the shell body can be reduced, further simplifying the processing and assembly process, and improving the sealing and leak-proof performance of the shell body.

[0021] Secondly, by bending outward at the top of the shell body to form a flange, effective support can be provided for the upper cover that matches the shell body, and the sealing and leak-proof performance of the overall structure can be improved by increasing the contact area between the shell body and the upper cover.

[0022] Furthermore, by setting convex ribs on the bottom plate, effective support can be formed for the battery pack, and the gas generated by the heat of the battery pack can be smoothly discharged to the outside; the convex ribs are constructed in the shape of "Ⅱ", and the groove in the central part can limit the foam glue used to fix the battery pack to prevent it from flowing to other positions before solidification. The explosion-proof valve set on the end plate plays the role of overload protection, and can discharge excess coolant and release the pressure inside the battery pack when the temperature of the battery pack rises abnormally.

[0023] In addition, the utility model also proposes a battery pack housing provided with the above-mentioned battery pack heat exchange structure.

[0024] A battery pack shell comprises the battery pack heat exchange structure described above, and an upper cover sealed on the top of the shell body.

[0025] The battery pack shell of the utility model, wherein the shell body cooperates with the upper cover sealed on the shell body, plays the role of wrapping and sealing the battery pack in the accommodating space.

[0026] In addition, the utility model also proposes a battery pack provided with the above-mentioned battery pack shell.

[0027] A battery pack comprises the battery pack housing as described above, and a plurality of battery packs;

[0028] A plurality of battery packs are stacked in the accommodation space in a manner parallel to the end plates and spaced apart from each other.

[0029] Furthermore, a plurality of limit bars are clamped in the gap between two adjacent battery packs; each of the limit bars is spaced apart from each other to divide the gap into a plurality of cooling channels connected between the water inlet and liquid distribution holes and the water outlet and liquid distribution holes.

[0030] Furthermore, the arrangement density of the limiting strips in the edge region of the gap is greater than the arrangement density of the limiting strips in the middle region of the gap.

[0031] The battery pack described in the utility model includes a battery pack housing and a plurality of battery packs arranged in the battery pack housing. By arranging the battery packs into multiple groups parallel to the end plates, the energy storage density of the battery pack can be improved. The limiting strips between the gaps between the battery packs play a role in keeping the battery packs in position, and can further optimize the circulation of the coolant. By reducing the arrangement density of the middle area of ​​the gap, the contact area between the coolant and the middle area of ​​the battery pack with a larger heat generation is increased, thereby achieving the purpose of further improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the exploded structure of the heat exchange structure of the battery pack in the embodiment of the present application;

[0034] Figure 2 This is a schematic diagram of the exploded structure of the battery pack housing in an embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the explosion structure of the battery pack in the embodiment of the present application;

[0036] Figure 4 Schematic diagram of the structure of the limit strip in the embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. Shell body;

[0039] 101, bottom plate; 1011, convex rib;

[0040] 102, end plate; 1021, explosion-proof valve;

[0041] 103. Water inlet side plate;

[0042] 1031, water inlet channel plate; 1032, water inlet liquid distribution plate; 1033, water inlet channel cavity; 1034, water inlet liquid distribution hole; 1035, liquid inlet;

[0043] 104, water side board;

[0044] 1041, water outlet flow channel plate; 1042, water outlet liquid distribution plate; 1043, water outlet flow channel cavity; 1044, water outlet liquid distribution hole; 1045, liquid outlet;

[0045] 105. Flanging;

[0046] 2. Upper cover; 3. Battery pack; 4. Limiting strip. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0048] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] Taking a battery pack heat exchange structure, battery pack housing and battery pack described in the present invention as an example, the directional words such as "up, down, left, right, front and back" used in the embodiments are defined based on the up and down direction (also known as the height direction, or the Z direction of the battery pack), the left and right direction (also known as the width direction, or the Y direction of the battery pack) and the front and back direction (also known as the length direction, or the X direction of the battery pack). "Inside and outside" are defined based on the contour of the corresponding parts. For example, "inside" and "outside" are defined based on the contour of the battery pack, and the side of the battery pack contour close to the middle of the battery pack is "inside", and the opposite is "outside".

[0050] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0051] The following will refer to the attached Figures 1 to 4 The utility model is described in detail in conjunction with the embodiments.

[0052] Embodiment 1

[0053] The present embodiment relates to a battery pack heat exchange structure, which uses an integrally formed aluminum alloy profile as the main material of the outer shell, and uses structures such as grooves and holes formed by stamping on the aluminum alloy profile as a circulation channel for the coolant of the immersed battery pack. The above-mentioned coolant circulation channel has a long extension path, a complex shape, and a good cooling effect. Compared with the solution in the prior art that uses a special-shaped foam cotton gasket sandwiched between battery cells to construct a coolant circulation cavity, since the use of special-shaped foam cotton gaskets is avoided, its processing and assembly process is simpler, and the space occupancy rate in the battery pack is lower, so as to achieve the purpose of reducing the difficulty of processing, storage and transportation of immersed battery packs and improving the heat dissipation efficiency of immersed battery packs.

[0054] In terms of overall structure, the battery pack heat exchange structure of this embodiment includes a shell body 1. Figure 1 , Figure 2 and Figure 3 The shell body 1 is a rectangular container with an open top. A accommodating space is defined inside the shell body 1, and the accommodating space is used to accommodate and install the battery pack 3 and related components, and to contain and guide the flow of the battery pack coolant. The shell body 1 includes a bottom plate 101, an end plate 102, a water inlet side plate 103 and a water outlet side plate 104. Among them, the bottom plate 101 can be a rectangular aluminum alloy plate. There are two end plates 102. The two end plates 102 are vertically connected to the edges of two opposite sides of the bottom plate 101, and the two end plates 102 are parallel to each other. The water inlet side plate 103 and the water outlet side plate 104 are respectively vertically connected to the edges of two opposite sides of the bottom plate 101, and the water inlet side plate 103 and the water outlet side plate 104 are parallel to each other.

[0055] As set above, when the battery pack coolant flows into the shell body 1 along the water inlet side plate 103, then exchanges heat with the battery pack 3 from the accommodating space, and finally is discharged from the water outlet side plate 104 to the outside of the shell body 1, the shell body 1 (mainly the water inlet side plate 103 and the water outlet side plate 104) guides and limits the flow of the battery pack coolant, and the combination of the cavity, groove, hole and other structures on the water inlet side plate 103 and the water outlet side plate 104 constitutes a channel for the flow of the battery pack coolant. The channel has a complex shape and a long extension path, thereby achieving the purpose of improving the heat dissipation efficiency of the immersed battery pack.

[0056] Based on the above design concept, specifically, in this embodiment, refer to Figure 1 , Figure 2 and Figure 3 , the bottom plate 101 can be a rectangular aluminum alloy metal sheet. The bottom plate 101 has a convex rib 1011. The convex rib 1011 is formed on the upper surface of the bottom plate 101 by stamping. The convex rib 1011 is constructed in the shape of "Ⅱ", and the number of the convex rib 1011 is set to be two parallel and spaced at a certain distance on the upper surface of the bottom plate 101. The transition area between the convex rib 1011 and the bottom plate 101 is rounded to reduce internal stress. The setting of the convex rib 1011 supports the battery pack 3, so that the battery pack 3 is not completely tightly fitted with the bottom plate 101, thereby forming an exhaust channel, which facilitates the high-pressure gas generated by the heating of the battery pack 3 to be smoothly discharged to the outside of the shell body 1. The groove formed in the central part of the "Ⅱ"-shaped structure of the convex rib 1011 has a limiting effect on the foam glue, which can prevent the unsolidified foam glue from flowing to other positions.

[0057] Reference Figure 1 , Figure 2 and Figure 3 , based on the purpose of forming a accommodating space with the bottom plate 101, in this embodiment, the edges of the two opposite sides of the bottom plate 101 are vertically connected with end plates 102. There are two end plates 102, and they are arranged parallel to each other. An explosion-proof valve 1021 is installed on at least one end plate 102. The explosion-proof valve 1021 is a one-way pressure valve. In this embodiment, an explosion-proof valve 1021 is installed on each of the two end plates 102. The two explosion-proof valves 1021 are symmetrically arranged about the geometric center of the bottom plate 101. The installation position of the explosion-proof valve 1021 on the end plate 102 is located between the two ribs 1011 on the bottom plate 101. As arranged above, the gas generated by the battery pack 3 can be discharged smoothly along the gap between the battery pack 3 and the bottom plate 101, and finally discharged to the outside of the shell body 1 through the explosion-proof valve 1021.

[0058] In order to further improve the cooling effect and heat dissipation efficiency, refer to Figure 1, the water inlet side plate 103 includes a water inlet channel plate 1031 and a water inlet liquid distribution plate 1032. Among them, the water inlet channel plate 1031 can be a rectangular metal sheet made of aluminum alloy. The water inlet channel cavity 1033 is processed on the water inlet channel plate 1031 by stamping and integrally forming. The water inlet channel cavity 1033 can be a groove that is interconnected as a whole and densely arranged in parallel with each other along the surface of the water inlet channel plate 1031. On the path of the water inlet channel cavity 1033 on the water inlet channel plate 1031, a liquid inlet 1035 is provided, and the liquid inlet 1035 is connected to the water inlet channel cavity 1033. The water inlet liquid distribution plate 1032 can be a rectangular metal sheet made of aluminum alloy. The water inlet liquid distribution plate 1032 is fixedly arranged with the water inlet channel plate 1031. A plurality of water inlet liquid distribution holes 1034 are provided on the water inlet liquid distribution plate 1032. The water inlet distribution hole 1034 can be a circular through hole. The water inlet distribution holes 1034 are arranged to be evenly distributed along the path of the water inlet channel cavity 1033 on the water inlet channel plate 1031. Due to the above arrangement, the water inlet distribution holes 1034 are all connected to the water inlet channel cavity 1033. The battery pack coolant flows in from the liquid inlet 1035, flows along the water inlet channel cavity 1033, and then flows into the interior of the shell body 1 through a plurality of different water inlet distribution holes 1034. The above structure ensures the complexity and cooling effect of the coolant flow channel and improves the heat dissipation efficiency. Compared with the solution of filling with special-shaped foam cotton gaskets, the stamping processing method reduces the difficulty of processing and assembly.

[0059] In order to further improve the cooling effect and heat dissipation efficiency, refer to Figure 1, the water outlet side plate 104 includes a water outlet channel plate 1041 and a water outlet liquid distribution plate 1042. Among them, the water outlet channel plate 1041 can be a rectangular metal sheet made of aluminum alloy. The water outlet channel cavity 1043 is processed on the water outlet channel plate 1041 by stamping and integrally forming. The water outlet channel cavity 1043 can be a groove that is interconnected as a whole and densely arranged in parallel with each other along the surface of the water outlet channel plate 1041. On the path of the water outlet channel cavity 1043 on the water outlet channel plate 1041, a liquid outlet 1045 is provided, and the liquid outlet 1045 is connected to the water outlet channel cavity 1043. The water outlet liquid distribution plate 1042 can be a rectangular metal sheet made of aluminum alloy. The water outlet liquid distribution plate 1042 is fixedly arranged with the water outlet channel plate 1041. A plurality of water outlet liquid distribution holes 1044 are provided on the water outlet liquid distribution plate 1042. The water outlet distribution hole 1044 can be a circular through hole. The water outlet distribution holes 1044 are arranged to be uniformly distributed along the path of the water outlet channel cavity 1043 on the water outlet channel plate 1041. Due to the above arrangement, the water outlet distribution holes 1044 are all connected to the water outlet channel cavity 1043. The battery pack coolant flows into the water outlet channel cavity 1043 from a plurality of different water outlet distribution holes 1044, and then is discharged from the liquid outlet 1045 to the outside of the shell body 1. The above structure ensures the complexity and cooling effect of the coolant flow channel and improves the heat dissipation efficiency. Compared with the solution of filling with special-shaped foam cotton gaskets, the stamping processing method reduces the difficulty of processing and assembly.

[0060] In order to further simplify the processing process, reduce the difficulty of assembly, and improve the sealing performance of the shell body 1, refer to Figure 1 and Figure 2 In this embodiment, the bottom plate 101, the water inlet channel plate 1031 and the water outlet channel plate 1041 are formed by integral stamping and then bent into a "J" shape. Due to the adoption of the above structure, the number of welds in the processing and assembly process of the shell body 1 is reduced, which is conducive to reducing the processing difficulty and improving the sealing performance of the shell body 1.

[0061] It should be noted that the descriptions of "water inlet", "water outlet", "liquid inlet", "liquid outlet" and the like mentioned above are all named with reference to the flow direction of the battery pack coolant, and do not represent the limitation of the flow direction and connection method of the battery pack coolant in actual use. The flow direction and connection method of the battery pack coolant in the embodiment of the present application can be adjusted according to actual needs to adapt to different working conditions.

[0062] Embodiment 2

[0063] This embodiment relates to a battery pack housing, including the housing body 1 described above, and an upper cover 2. Figure 2 and Figure 3In order to ensure the sealing of the battery pack shell, a flange 105 is provided at the top of the shell body 1. The flange 105 can be integrally formed on the top edge of the shell body 1 by sheet metal bending. The flange 105 is arranged to be distributed circumferentially along the top edge of the shell body 1. The flange 105 can increase the contact area between the shell body 1 and the upper cover 2, which is beneficial to improving the sealing of the battery pack shell. A sealing strip is provided between the upper cover 2 and the shell body 1, and structural adhesive is used to bond and seal.

[0064] Embodiment 3

[0065] Reference Figure 2 and Figure 3 This embodiment relates to a battery pack, including the battery pack shell, battery pack 3 and limit strip 4 as described above. The battery packs 3 are stacked and installed in the accommodation space of the shell body 1 in a direction parallel to the end plate 102, and the limit strip 4 is sandwiched in the gap between two adjacent battery packs 3. The limit strip 4 can be made of a rectangular strip of foamed polypropylene.

[0066] Reference Figure 2 and Figure 3 In order to further improve the heat dissipation efficiency, the limiting strips 4 are arranged to be equidistant from top to bottom and parallel to each other. In this embodiment, the number of limiting strips 4 is six. Due to the use of multiple limiting strips 4 arranged in parallel with each other, the gap between two adjacent battery packs 3 is divided into multiple passages respectively connected to the water inlet distribution hole 1034 and the water outlet distribution hole 1044. The passages serve as independent channels for the circulation of coolant, which can further improve the heat dissipation efficiency.

[0067] Reference Figure 3 and Figure 4 In order to obtain a better cooling effect, the limiting strips 4 are configured such that the density of the limiting strips 4 in the middle region of the gap between the two battery packs 3 is less than the density of the limiting strips 4 in the edge region of the gap between the two battery packs 3. Since the main heat generation and heat accumulation locations of the battery pack 3 are generally concentrated in the middle region, by reducing the density of the limiting strips 4 in the middle region, the contact area between the battery pack coolant and the battery pack 3 can be increased, thereby achieving a better cooling effect.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A battery pack heat exchange structure, characterized in that: include: A shell body, wherein the top of the shell body is open and a storage space suitable for accommodating a battery pack is defined in the shell body; The shell body includes a bottom plate, a pair of end plates fixedly connected to one opposite side of the bottom plate, and an inlet side plate and an outlet side plate fixedly connected to the other opposite side of the bottom plate; The water inlet side plate includes a water inlet channel plate and a water inlet liquid distribution plate; the water inlet channel plate is formed with a water inlet channel cavity recessed in the inner surface of the water inlet channel plate by stamping; a plurality of water inlet liquid distribution holes are distributed on the water inlet liquid distribution plate; The water inlet liquid distribution plate is fixedly sealed on the inner surface of the water inlet flow channel plate to form a connection between the water inlet flow channel cavity and the plurality of water inlet liquid distribution holes; a liquid inlet is provided on the water inlet flow channel plate in the path where the water inlet flow channel cavity passes; The water outlet side plate includes a water outlet channel plate and a water outlet liquid distribution plate; a water outlet channel cavity recessed in the inner surface of the water outlet channel plate is formed on the water outlet channel plate by stamping; a plurality of water outlet liquid distribution holes are distributed on the water outlet liquid distribution plate; the water outlet liquid distribution plate is fixedly sealed on the inner surface of the water outlet channel plate to form a connection between the water outlet channel cavity and the plurality of water outlet liquid distribution holes; a liquid outlet is provided on the water outlet channel plate in the path through which the water outlet channel cavity passes.

2. The battery pack heat exchange structure according to claim 1, characterized in that: The water inlet channel plate, the bottom plate and the water outlet channel plate are constructed in a "J" shape that is formed by bending after integral molding.

3. The battery pack heat exchange structure according to claim 1, characterized in that: A flange bent outward is formed on the top of the shell body to support an upper cover sealed on the top of the shell body.

4. The battery pack heat exchange structure according to any one of claims 1 to 3, characterized in that: A convex rib protruding upward is stamped on the bottom plate to support the battery pack accommodated in the accommodation space.

5. The battery pack heat exchange structure according to claim 4, characterized in that: The convex rib is extended between the two end plates, and the convex rib is configured as two parallel ribs arranged at a distance; an explosion-proof valve is arranged on at least one of the end plates, and the explosion-proof valve is correspondingly located in the spacing area between the two convex ribs.

6. The battery pack heat exchange structure according to claim 4, characterized in that: The convex rib is constructed in a "Ⅱ" shape.

7. A battery pack housing, characterized in that: The battery pack shell has a battery pack heat exchange structure as claimed in any one of claims 1 to 6, and an upper cover sealed on the top of the shell body.

8. A battery pack, characterized in that: The battery pack comprises the battery pack housing as claimed in claim 7, and a plurality of battery packs; A plurality of battery packs are stacked in the accommodation space in a manner parallel to the end plates and spaced apart from each other.

9. The battery pack according to claim 8, characterized in that: A plurality of limit bars are clamped in the gap between two adjacent battery packs; the limit bars are arranged at intervals from each other to divide the gap into a plurality of cooling channels connected between the water inlet and liquid distribution holes and the water outlet and liquid distribution holes.

10. The battery pack according to claim 9, characterized in that: The arrangement density of the limiting strips in the edge region of the gap is greater than the arrangement density of the limiting strips in the middle region of the gap.

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