Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a battery assembly and a pack shell, the battery assembly comprises at least one energy storage module unit arranged in an array mode, and each energy storage module unit comprises a column of single batteries arranged in an array mode. The packaging shell comprises a lower supporting plate used for being supported on the bottom face of the battery assembly. The upper bottom surface of the lower supporting plate is provided with a bottom runner plate corresponding to each column of battery monomers, and the bottom runner plate is provided with temperature control runners at intervals, wherein the temperature control runners are used for circulating a temperature control medium; at least one side of the bottom runner plate is provided with a liquid inlet flow dividing runner, and the liquid inlet flow dividing runner is provided with flow dividing holes corresponding to the temperature control runners. According to the battery pack disclosed by the utility model, the sealing performance and the structural strength can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric energy storage, and specifically relates to a battery pack. BACKGROUND

[0002] With the continuous improvement of energy consumption structure in China, the energy storage system has been greatly applied and developed. In some application scenarios, the energy storage system is required to have a large capacity, a high charging and discharging voltage and a high charging and discharging current. Therefore, the existing electrochemical energy storage system mostly comprises a plurality of energy storage modules, and each energy storage module is composed of a plurality of battery monomers.

[0003] A Chinese patent application with the publication number CN118630415A discloses an energy storage module and an energy storage module unit. The energy storage module comprises a battery assembly, a consolidation assembly and a bottom plate assembly. The consolidation assembly is used for fixing the battery assembly, and the bottom plate assembly is used for shunting the injected temperature control medium. The bottom plate assembly and the consolidation assembly are separately arranged, and the bottom plate assembly is arranged below the consolidation assembly. The sealing performance between the bottom plate of the bottom plate assembly and the lower frame of the consolidation assembly is poor, and the overall performance between the bottom plate assembly and the consolidation assembly is poor, which finally affects the sealing performance and the structural strength of the energy storage module. SUMMARY

[0004] Therefore, the utility model aims to provide a battery pack which can improve the sealing performance and the structural strength.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0006] A battery pack comprises a battery assembly and a pack shell.

[0007] The battery assembly comprises at least one energy storage module unit arranged in an array, and the energy storage module unit comprises a column of battery monomers arranged in an array. The pack shell comprises a lower supporting plate used for supporting the bottom surface of the battery assembly.

[0008] The lower supporting plate is provided with a bottom flow channel plate corresponding to each column of battery monomers on the upper bottom surface. At least one side of the bottom flow channel plate is provided with a liquid inlet shunt flow channel in the first direction. The bottom flow channel plate is provided with a temperature control flow channel in the second direction at intervals. The liquid inlet shunt flow channel is provided with a shunt hole corresponding to the temperature control flow channel. The first direction and the second direction are perpendicular to each other.

[0009] Further, the bottom flow channel plate is provided with a protruding part protruding upward for supporting the battery monomers at intervals. The temperature control flow channel comprises a first temperature control flow channel between adjacent two protruding parts and a second temperature control flow channel between the protruding part and the lower supporting plate.

[0010] Further, all the protruding parts are provided with a communication hole in communication with the second temperature control flow channel; or, the bottom flow channel plate comprises a flow channel plate front section and a flow channel plate rear section, the flow channel plate front section is located on the side of the flow channel plate rear section facing the liquid inlet of the liquid inlet shunt flow channel; the protruding part located on the flow channel plate rear section is provided with a communication hole in communication with the second temperature control flow channel.

[0011] Further, the bottom flow channel plate is provided with a support frame for supporting the battery monomer; the support frame comprises a support plate, and a support column is arranged below the support plate.

[0012] Further, the height of the support plate is higher than the top surface of the protruding part, and a flow gap for the flow of temperature control medium is formed between the battery monomer and the bottom flow channel plate; a flow channel for the flow of temperature control medium is arranged on the top surface of the support plate.

[0013] Further, the middle part and both sides of the bottom flow channel plate are respectively provided with the support frame.

[0014] Further, the shunt hole comprises a first shunt hole corresponding to the first temperature control flow channel and a second shunt hole corresponding to the second temperature control flow channel.

[0015] Further, the bag shell is provided with a liquid inlet in communication with the liquid inlet shunt flow channel; the liquid inlet and the liquid inlet shunt flow channel are one-to-one corresponding.

[0016] Further, the bag shell is provided with a liquid inlet channel, the liquid inlet channel is provided with a total liquid inlet pipe, and the liquid inlet channel is in communication with each of the liquid inlet shunt flow channels through the liquid inlet.

[0017] Further, the energy storage module unit comprises end pressure plates respectively arranged at both ends of a row of battery monomers, side stop plates respectively located on both sides of the battery monomers are further arranged between the two end pressure plates, both ends of the side stop plate are fixedly connected with the two end pressure plates, and the bottom of the side stop plate is provided with a lower supporting rail for supporting the bottom surface of the battery monomer, and the top of the side stop plate is provided with an upper pressing rail for pressing the top surface of the battery monomer.

[0018] Further, the end pressure plate is provided with a lifting hole.

[0019] Further, the bag shell comprises an upper frame sleeved on the upper part of the battery assembly and a lower frame sleeved on the lower part of the battery assembly, the upper frame is provided with an upper pressing strip for pressing the top surface of the battery assembly, and the lower frame is provided with the lower supporting plate for supporting the bottom surface of the battery assembly; the upper frame and the lower frame are fixedly connected with the end pressure plate.

[0020] Further, the front side of the bag shell is provided with an upper mounting plate, and the upper mounting plate is provided with copper bar fixing terminals and Luer caps for wiring.

[0021] Further, the rear side of the bag shell is provided with a rear wheel mounting bracket, and the rear wheel mounting bracket is provided with a roller exposed to the lower surface of the bag shell.

[0022] The battery pack has the advantages that:

[0023] The battery pack has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model provides the following drawings for description:

[0025] Figure 1 It is the structural diagram of the battery pack of the utility model;

[0026] Figure 2 It is the structural diagram of the battery pack of the utility model after hiding the top cover plate;

[0027] Figure 3 It is the sectional view of the battery pack in the first direction of the utility model;

[0028] Figure 4 It is the sectional view of the battery pack in the second direction of the utility model;

[0029] Figure 5 It is the enlarged view of area A of the utility model; Figure 4

[0030] Figure 6 It is the upper axonometric view of the energy storage module unit;

[0031] Figure 7 It is the lower axonometric view of the energy storage module unit;

[0032] Figure 8 It is the first structural diagram of the side baffle;

[0033] Figure 9 It is the second structural diagram of the side baffle;

[0034] Figure 10 It is the structural diagram of the gasket assembly;​

[0035] Figure 11 Structure diagram of top cover plate;

[0036] Figure 12 Structure diagram of bag shell;

[0037] Figure 13 Structure diagram of bottom flow channel plate; Figure 13 (a) Structure diagram of front section of flow channel plate; Figure 13 (b) Structure diagram of rear section of flow channel plate;

[0038] Figure 14 Structure diagram of liquid inlet shunt flow channel;

[0039] Figure 15 Structure diagram of support frame.

[0040] Explanation of reference signs:

[0041] 10 - energy storage module unit; 11 - end pressing plate; 12 - battery monomer; 13 - side baffle; 131 - lower supporting edge; 132 - upper pressing edge; 133 - hollow hole; 14 - binding belt; 15 - first gap channel; 16 - gasket; 17 - connecting strip;

[0042] 21 - upper frame; 211 - upper pressing strip; 22 - lower frame; 221 - lower supporting plate; 23 - longitudinal connecting strip; 231 - clamping head; 24 - second gap channel; 25 - top cover plate; 251 - positioning groove; 252 - clearance hole; 253 - hollow hole; 26 - tab connecting piece; 27 - mounting plate; 271 - copper plate fixed terminal; 272 - Luer; 28 - rear wheel mounting support; 29 - roller;

[0043] 31 - bottom flow channel plate; 31a - front section of flow channel plate; 31b - rear section of flow channel plate; 311 - protruding part; 312 - communication hole; 32 - liquid inlet shunt flow channel; 321 - first shunt hole; 322 - second shunt hole; 33 - first temperature control flow channel; 34 - second temperature control flow channel; 35 - liquid inlet; 36 - support frame; 361 - supporting plate; 362 - supporting column; 363 - flow-through channel; 37 - flow-through gap; 39 - liquid inlet channel; 40 - total liquid inlet pipe. DETAILED DESCRIPTION

[0044] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. The embodiments are not intended to limit the present application.

[0045] As Figures 1-5As shown, the battery pack of the embodiment comprises a battery assembly and a pack shell. Specifically, the battery assembly of the embodiment comprises at least one energy storage module unit 10 arranged in an array, the energy storage module unit 10 comprising a column of battery monomers 12 arranged in an array; the pack shell comprises a lower supporting plate 222 for supporting on the bottom surface of the battery assembly. In the embodiment, the pack shell comprises an upper frame 21 sleeved on the upper part of the battery assembly and a lower frame 22 sleeved on the lower part of the battery assembly, the upper frame 21 is provided with an upper pressing strip 211 for pressing on the top surface of the battery assembly, and the lower frame 22 is provided with a lower supporting plate 221 for supporting on the bottom surface of the battery assembly. The upper frame 21 and the lower frame 22 are fixedly connected with the end pressing plate 11. In the embodiment, the side surface of the pack shell has a hollow space, and the top surface is also provided with an open type opening. However, in other embodiments, the pack shell can also be a structure with an open top and no openings on the other side surfaces and the bottom surface; the pack shell can also be a sealed type and be provided with a liquid inlet at the bottom of the pack shell and an overflow port at the top of the pack shell, and the like, which will not be described herein. In the embodiment, the energy storage module units 10 are arranged side by side in six, and the direction in which the energy storage module units 10 are arranged side by side is perpendicular to the direction in which the column of battery monomers 12 in the energy storage module unit 10 is arranged. In this way, the upper frame 21 and the lower frame 22 are clamped on the upper part and the lower part of the battery assembly, respectively, to fix the battery assembly in the circumferential direction, and the upper pressing strip 211 provided on the upper frame 21 and the lower supporting plate 221 provided on the lower frame 22 are arranged to press on the top surface and support on the bottom surface of the battery assembly, respectively, to fix the battery assembly in the up-down direction, and in combination with the energy storage module units 10 which form an integral structure, the battery assembly can form an integral consolidated structure to improve the structural strength.

[0046] In the embodiment, a longitudinal connecting strip 23 is arranged between the upper frame 21 and the lower frame 22, and the two ends of the longitudinal connecting strip 23 are connected with the upper frame 21 and the lower frame 22, respectively. Specifically, in the embodiment, the upper frame 21 and the lower frame 22 are respectively provided with corresponding clamping grooves, and the two ends of the longitudinal connecting strip 23 are respectively provided with clamping heads 231 matched with the clamping grooves. Of course, the two ends of the longitudinal connecting strip 23 can also be connected with the upper frame 21 and the lower frame 22 through threaded connecting members, which will not be described herein.

[0047] In the embodiment, a second gap channel 24 for the flow of temperature control medium is arranged between the adjacent two energy storage module units 10, the upper pressing strip 211 is arranged at the edge position of the top surface of the battery assembly, and the lower supporting plate 221 is arranged below the battery assembly, so that the upper end of the second gap channel 24 is not sealed, and the temperature control medium can flow out through the upper end of the second gap channel 24. In the embodiment, the adjacent two energy storage module units 10 are fixedly connected. Specifically, there are various ways to fixedly connect the adjacent two energy storage module units 10, and in the embodiment, the point gluing method is adopted to fixedly connect the adjacent two energy storage module units 10 between the side baffles 13, which not only meets the connection requirement, but also does not affect the flowability of the second gap channel 24.

[0048] In this embodiment, an upper mounting plate 27 is installed on the front side of the casing. A copper busbar fixing terminal 271 and a gland 272 are mounted on the upper mounting plate 27. The copper busbar fixing terminal 271 is used to connect the busbar to improve its stability during drop impacts. The gland 272 is used for wiring.

[0049] In this embodiment, a rear wheel mounting bracket 28 is installed on the rear side of the outer casing, and a roller 29 protruding from the lower surface of the outer casing is installed on the rear wheel mounting bracket 28 to facilitate the movement of the energy storage module during installation and maintenance.

[0050] like Figures 6-10 As shown, the energy storage module unit 10 of this embodiment includes two end plates 11 and a row of battery cells 12 disposed between the two end plates 11. Side baffles 13 are also provided between the two end plates 11, located on both sides of the battery cells 12, with both ends of the side baffles 13 fixedly connected to the two end plates 11. In this embodiment, the bottom of the side baffles 13 has a lower support edge 131 for supporting the bottom surface of the battery cells 12, and the top of the side baffles 13 has an upper pressure edge 132 for pressing against the top surface of the battery cells 12. Thus, the two end plates 11 and the two side baffles 13 form a circumferential fixing structure around the row of battery cells 12. Simultaneously, the lower support edge 131 and the upper pressure edge 132 provided on the two side baffles 13 constitute a vertical fixing structure for the row of battery cells 12. This allows a row of battery cells 12 belonging to the same energy storage module unit 10 to be fixed as a single structure, effectively improving structural strength. In a preferred embodiment of this example, the energy storage module unit 10 further includes at least one binding strap 14 wrapped around the end pressure plate 11 and the side baffle 13 to further improve the circumferential fixing strength. In this embodiment, two binding straps 14 are provided. Specifically, the number of binding straps 14 is set according to actual application needs and will not be elaborated further.

[0051] In this embodiment, first gap channels 15 for the flow of temperature control medium are provided between two adjacent battery cells 12 and between adjacent end pressure plates 11 and battery cells 12. To facilitate the flow of temperature control medium within the first gap channels 15, the upper pressure edge 132 of this embodiment presses against the top edge of the battery cell 12, and the first lower pressure edge 131 supports the bottom edge of the battery cell 12. Thus, there are gaps between the upper pressure edges 132 and between the first lower pressure edges 131 of the two side baffles 13, allowing the temperature control medium to enter and exit the first gap channels 15 through the gaps between the upper pressure edges 132 and between the first lower pressure edges 131, enabling the temperature control medium to flow within the first gap channels 15.

[0052] In the embodiment, the gasket assembly is arranged in the first gap channel 15 to bear pressure and inhibit the battery monomer 12 from swelling and deforming. Specifically, the gasket assembly includes a plurality of gaskets 16. The gasket assembly can be arranged in the first gap channel 15 in various ways. For example, in a first way, the gaskets 16 are arranged in an array in the first gap channel 15, and the first gap channel 15 has a first spacing between adjacent gaskets 16 for the temperature control medium to flow through. In a second way, the gaskets 16 are arranged in an array, and the first gap channel 15 has a first spacing between adjacent gaskets 16 for the temperature control medium to flow through. In addition, a connecting strip is arranged between the adjacent gaskets 16, and the connecting strip is used to connect the two gaskets 16. The thickness of the connecting strip is less than the thickness of the gasket 16 to allow the temperature control medium to flow through. In a third way, as shown in Figure 10 the embodiment, the gasket assembly further includes a connecting net, and the connecting net includes a plurality of connecting strips 17. The gaskets 16 are arranged in an array on the connecting net, and each gasket 16 is fixedly connected to at least two connecting strips 17. The thickness of the connecting strip 17 is less than the thickness of the gasket, and the first gap channel 15 has a first spacing between adjacent gaskets 16 to allow the temperature control medium to flow through. In the embodiment, the connecting net includes first connecting strips in a first direction and second connecting strips in a second direction, and the first direction is not parallel to the second direction. The gaskets 16 are arranged at the intersection nodes of the first connecting strips and the second connecting strips. In a preferred embodiment of the embodiment, the connecting net is provided with a wiring channel for arranging a signal acquisition line, so as to arrange a temperature sensor or the like that can acquire the temperature of, for example, the middle position of the surface of the battery monomer 12.

[0053] In the embodiment, the same energy storage module unit 10 has the two side plates 13 respectively provided with the hollow holes 133 for the temperature control medium to flow through. Alternatively, one of the two side plates 13 is provided with the hollow holes 133 for the temperature control medium to flow through. Figures 6-7The hollow hole 133 enables the temperature control medium in the second gap channel between two adjacent energy storage module units 10 to directly contact and exchange heat with the side of the battery monomer 12, and can improve the temperature control efficiency. Specifically, when the battery assembly includes two energy storage module units 10, the hollow hole 133 for the temperature control medium to flow through is arranged on the side baffle 13 on the side facing the energy storage module unit 10. The hollow hole 133 is not arranged on the side baffle 13 on the side facing away from the two energy storage module units 10. When the battery assembly includes at least three energy storage module units, the side baffles 13 on both sides of the middle energy storage module unit 10 are respectively provided with the hollow hole 133. Among the two energy storage module units 10 at both ends, the hollow hole 133 is arranged on the side baffle 13 on the side facing each other, and the hollow hole 133 is not arranged on the side baffle 13 on the side facing away from each other. That is, when the side baffle 13 is located on the side of the corresponding energy storage module unit 10 facing the other energy storage module unit 10, the hollow hole 133 is arranged on the side baffle 13, otherwise, the hollow hole 133 is not arranged on the side baffle 13. In the preferred embodiment of the present embodiment, a protrusion or a curled edge for structural reinforcement is arranged at the position of the four peripheral edges of the hollow hole 133, and the protrusion or the curled edge is located on the side of the side baffle 13 facing away from the battery monomer 12.

[0054] In the present embodiment, a top cover plate 25 is arranged on the top of the battery assembly. As shown in Figure 11 The top cover plate 25 is provided with a positioning groove 251 for positioning the tab connector 26, and the positioning groove 125 is provided with a clearance hole 252 for accommodating the pole of the battery monomer 12. Of course, the top cover plate 25 is also provided with a hollow hole 253 for the temperature control medium to flow through corresponding to the first gap channel 15 and the second gap channel 24.

[0055] As shown in Figure 12 In the present embodiment, the bottom surface of the lower supporting plate 221 is provided with a bottom flow channel plate 31 corresponding to each column of battery monomers 12, at least one side of the bottom flow channel plate 31 is provided with a liquid inlet shunt flow channel 32 in the first direction, and the bottom flow channel plate 31 is provided with temperature control flow channels in the second direction. The liquid inlet shunt flow channel 32 is provided with a shunt hole corresponding to the temperature control flow channel. In the present embodiment, the first direction and the second direction are perpendicular to each other. That is, in the present embodiment, the temperature control medium is injected into the liquid inlet shunt flow channel 32, so that the temperature control medium flowing in the first direction is gradually shunted through the shunt hole, and the shunted temperature control medium enters the temperature control flow channel.

[0056] Specifically, as shown in Figure 13 In the present embodiment, the bottom flow channel plate 31 is provided with a protruding portion 311 protruding upward. As shown in Figure 14 The temperature control flow channel includes a first temperature control flow channel 33 between adjacent two protruding portions 311 and a second temperature control flow channel 34 between the protruding portion 311 and the lower supporting plate 221. As shown in Figure 12As shown, in the embodiment, the bottom flow channel plate 31 comprises a flow channel plate front section 31a and a flow channel plate rear section 31b, and the flow channel plate front section 31a is located on the side of the flow channel plate rear section 31b facing the liquid inlet of the liquid inlet shunt flow channel 32. In the embodiment, the flow channel plate front section 31a and the flow channel plate rear section 31b are separately arranged, as shown in Figure 13 (a)- Figure 13 (b). Of course, in some other embodiments, the flow channel plate front section 31a and the flow channel plate rear section 31b can be integrated. In the embodiment, the protruding part 311 of the flow channel plate rear section 31b is provided with a communication hole 312 connected with the second temperature control flow channel 34, and the communication hole 312 can communicate the first temperature control flow channel 33 and the second temperature control flow channel 34, so as to reduce the flow resistance in the first temperature control flow channel 33 and the second temperature control flow channel 34 located in the middle and rear parts, and make the temperature control medium flow more uniformly in the front, middle and rear parts. In another embodiment, the communication hole 312 connected with the second temperature control flow channel 34 can also be arranged on all the protruding parts 311, which will not be described herein. Specifically, as shown in Figure 14 In the embodiment, the shunt hole comprises a first shunt hole 321 corresponding to the first temperature control flow channel 33 and a second shunt hole 322 corresponding to the second temperature control flow channel 34.

[0057] In the embodiment, the bottom flow channel plate 31 is provided with a support frame 36 for supporting the battery monomer 12. Specifically, as shown in Figure 15 The support frame 36 comprises a support plate 361, and a support column 362 is arranged below the support plate 361 in a spaced manner, and the lower end of the support column 362 abuts against the bottom surface of the first temperature control flow channel 33 or the lower supporting plate 221. The support frame 36 is used for supporting the battery monomer 12. Preferably, the height of the support plate 361 is higher than the top surface of the protruding part 311, and a flow gap 37 for the flow of the temperature control medium is formed between the battery monomer 12 and the bottom flow channel plate 31, as shown in Figure 3 Preferably, the top surface of the support plate 361 is provided with a flow channel 363 for the flow of the temperature control medium. In this way, the temperature control medium located on the bottom surface of the battery monomer 12 can flow and interact sufficiently, thereby improving the temperature control performance and the uniform temperature performance. As shown in Figure 12 In the embodiment, the support frame 36 is arranged in the middle and on both sides of the bottom flow channel plate 31. Specifically, in the embodiment, one support frame 36 is arranged in the middle of the bottom flow channel plate 31, and one support frame 36 is arranged on each side of the bottom flow channel plate 31. The top surface of the support plate 361 of the support frame 36 arranged in the middle of the bottom flow channel plate 31 is provided with a flow channel 363. In this way, the three support frames 36 can stably support the energy storage module unit 10 and the battery monomer 12. The bottom flow channel plate

[0058] In the embodiment, the bag shell is provided with liquid inlet ports communicated with the liquid inlet branch flow channels 32, and the liquid inlet ports are arranged one by one corresponding to the liquid inlet branch flow channels 32. Figure 12 As shown in the figure, the bag shell of the embodiment is externally provided with a liquid inlet channel 39, the liquid inlet channel 39 is provided with a total liquid inlet pipe 40, the liquid inlet channel 39 is communicated with each liquid inlet branch flow channel 32 through a liquid inlet port, in this way, the temperature control medium can be respectively injected into each liquid inlet branch flow channel 32 through the liquid inlet channel 39, and then be branched to the first temperature control flow channel 33 and the second temperature control flow channel 34 through the first branch hole 321 and the second branch hole 322. The temperature control medium in the first temperature control flow channel 33 and the second temperature control flow channel 34 flows upward into the first gap channel 15 and the second gap channel 24, and flows out from the upper end of the first gap channel 15 and the second gap channel 24, realizing the dynamic flow of the temperature control medium.

[0059] The above-mentioned embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. The equivalent substitutions or transformations made by the skilled in the art on the basis of the present application are all within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A battery pack, characterized by: Including battery components and pack casing; The battery assembly includes at least one energy storage module unit arranged in an array, the energy storage module unit including a row of battery cells arranged in an array; the housing includes a lower support plate for supporting the bottom surface of the battery assembly. The bottom surface of the lower support plate is provided with a bottom flow channel plate corresponding to each row of battery cells. At least one side of the bottom flow channel plate is provided with an inlet flow channel in a first direction. Temperature control channels in a second direction are provided at intervals on the bottom flow channel plate. The inlet flow channel is provided with a flow diversion hole corresponding to the temperature control channel. The first direction and the second direction are perpendicular to each other.

2. The battery pack of claim 1, wherein: The bottom flow channel plate is provided with upwardly protruding protrusions at intervals; the temperature control flow channel includes a first temperature control flow channel located between two adjacent protrusions and a second temperature control flow channel located between the protrusions and the lower support plate.

3. The battery pack of claim 2, wherein: All of the protrusions are provided with a connecting hole that communicates with the second temperature control channel; or, the bottom channel plate includes a front section and a rear section, the front section of the channel plate is located on the side of the rear section of the channel plate facing the liquid inlet of the liquid distribution channel; the protrusion located on the rear section of the channel plate is provided with a connecting hole that communicates with the second temperature control channel.

4. The battery pack of claim 2, wherein: Above the bottom flow channel plate is a support frame for supporting individual battery cells; the support frame includes a support plate, and support columns are spaced apart below the support plate.

5. The battery pack of claim 4, wherein: The height of the support plate is higher than the top surface of the protrusion, and a flow gap for the flow of temperature control medium is formed between the battery cell and the bottom flow channel plate; the top surface of the support plate is provided with a flow channel for the flow of temperature control medium.

6. The battery pack of claim 4, wherein: The support frame is provided in the middle and on both sides of the bottom flow channel plate.

7. The battery pack of claim 2, wherein: The flow divider includes a first flow divider corresponding to the first temperature control channel and a second flow divider corresponding to the second temperature control channel.

8. The battery pack of any one of claims 1-7, wherein: The outer shell of the package is provided with an inlet that communicates with the liquid inlet diversion channel; the inlet and the liquid inlet are respectively arranged in a one-to-one correspondence.

9. The battery pack of claim 8, wherein: The outer shell of the package is provided with a liquid inlet channel, and the liquid inlet channel is provided with a main liquid inlet pipe. The liquid inlet channel is connected to each of the liquid inlet branch channels through the liquid inlet.

10. The battery pack of claim 1, wherein: The energy storage module unit includes end plates respectively disposed at both ends of a row of battery cells. A side baffle is also disposed between the two end plates and located on both sides of the battery cell. The two ends of the side baffle are fixedly connected to the two end plates respectively. The bottom of the side baffle is provided with a lower support edge for supporting the bottom surface of the battery cell, and the top of the side baffle is provided with an upper pressure edge for pressing on the top surface of the battery cell.

11. The battery pack of claim 10, wherein: The end plate is provided with lifting holes.

12. The battery pack of claim 10, wherein: The outer casing includes an upper frame fitted over the battery assembly and a lower frame fitted over the battery assembly. The upper frame is provided with an upper pressure strip for pressing against the top surface of the battery assembly, and the lower frame is provided with a lower support plate for supporting the bottom surface of the battery assembly. Both the upper frame and the lower frame are fixedly connected to the end pressure plate.

13. The battery pack of claim 1, wherein: The front side of the bag shell is provided with an upper mounting plate, and the upper mounting plate is provided with copper strip fixing terminals and Luer for wiring.

14. The battery pack of claim 1, wherein: The rear side of the bag shell is provided with a rear wheel mounting bracket, and the rear wheel mounting bracket is provided with a roller wheel exposed to the lower surface of the bag shell.

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