Battery assembly

Abstract

The utility model relates to the field of batteries, and provides a battery assembly. The battery assembly comprises: a battery cell provided with a pole; the shell is provided with an opening, one end, deviating from the pole, of the battery cell penetrates through the opening to be arranged in the shell, one end, provided with the pole, of the battery cell is arranged outside the shell, and the battery cell is in sealed connection with the opening. The shell is further provided with an inlet allowing a heat exchange medium to enter and an outlet allowing the heat exchange medium to be discharged. The pole of the battery cell is arranged outside the shell, so that elements such as a busbar or a circuit board connected with the pole are all arranged outside the shell, and the shell does not need to be disassembled or opened when the electrical elements are repaired or maintained, so that the electrical elements are more convenient to repair or maintain.

Description

Technical Field

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

[0002] As the global electrification process advances, new energy battery technology continues to innovate. Whether it is energy storage or power batteries, a thermal management system must be used to keep the battery cells in the pack at a suitable operating temperature under different working conditions, and the smaller the temperature difference in the pack, the better.

[0003] In order to improve the cooling effect of the battery, the battery assembly provided in the related art includes a shell and a battery cell. The shell is used to accommodate a heat exchange medium, and the side wall of the shell is provided with an inlet for the heat exchange medium to enter and an outlet for the heat exchange medium to flow. The battery cell is completely immersed in the heat exchange medium in the shell. In this way, the heat exchange medium can directly exchange heat with the battery cell, thereby improving the heat exchange efficiency between the heat exchange medium and the battery cell.

[0004] The inventors found that in the battery assembly in the related art, the poles of the battery cells are arranged inside the shell, so the bus and the circuit board are both arranged inside the shell, which makes it inconvenient to repair and maintain the bus and the circuit board. Utility Model Content

[0005] The utility model provides a battery assembly for solving the defect in the related art that the pole of the battery cell is arranged in a shell, so the bus bar and the circuit board are arranged inside the shell, which makes it inconvenient to repair and maintain the bus bar and the circuit board.

[0006] The utility model provides a battery assembly, comprising:

[0007] A battery cell having a pole;

[0008] The shell is provided with an opening, the end of the battery cell facing away from the pole passes through the opening and is placed inside the shell, the end of the battery cell provided with the pole is arranged outside the shell, the battery cell is sealed and connected to the opening, and the shell is also provided with an inlet for heat exchange medium to enter and an outlet for heat exchange medium to discharge.

[0009] According to a battery assembly provided by the utility model, the battery assembly further includes a sealing structure, which is arranged between the battery core and the opening and is used to seal the gap between the battery core and the opening.

[0010] According to a battery assembly provided by the utility model, the sealing structure includes:

[0011] an annular flange, the annular flange is connected to the shell, and the annular flange is extended along the edge of the opening;

[0012] A first seal is provided between the annular flange and the battery cell.

[0013] According to a battery assembly provided by the utility model, a connecting plate is provided on the battery core, the connecting plate and the annular flange are arranged opposite to each other and connected, and the first sealing member is sealingly arranged between the annular flange and the connecting plate.

[0014] According to a battery assembly provided by the utility model, the battery assembly also includes a threaded connector, which passes through the annular flange, the first seal and the connecting plate, and connects the annular flange, the first seal and the connecting plate.

[0015] According to a battery assembly provided by the utility model, the connecting plate is connected to the battery core.

[0016] According to a battery assembly provided by the utility model, the number of the battery cells is set to at least two, and the battery cells are all connected to the connecting plate.

[0017] According to a battery assembly provided by the utility model, the annular flange is arranged on the inner side of the opening, and the first sealing member is arranged between the battery core and the annular flange.

[0018] According to a battery assembly provided by the utility model, a mounting ring groove for placing the first sealing member is provided on the inner wall of the annular flange.

[0019] According to a battery assembly provided by the utility model, the inlet and the outlet are respectively arranged on two opposite side walls of the shell.

[0020] In the battery assembly provided by the utility model, the poles of the battery cells are arranged outside the shell, so the components such as the busbar or the circuit board connected to the poles are all arranged outside the shell, and when these electrical components are repaired or maintained, there is no need to disassemble or open the shell, thereby making the repair or maintenance of the electrical components more convenient.

[0021] In addition, the electrical components are arranged outside the housing, so there is no need to increase the sealing and assembly requirements of the electrical components, thereby reducing the cost of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a battery assembly provided by an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 an axonometric view of the battery assembly shown;

[0025] Figure 3 yes Figure 1 An exploded view of the battery assembly shown;

[0026] Figure 4 It is a structural schematic diagram of another battery assembly provided by an embodiment of the utility model;

[0027] Figure 5 yes Figure 4 an axonometric view of the battery assembly shown;

[0028] Figure 6 yes Figure 4 Exploded view of the battery assembly shown.

[0029] Reference numerals:

[0030] 1. Battery cell; 101. Pole; 102. Cover plate; 2. Shell; 201. Opening; 202. Inlet; 203. Outlet; 3. Annular flange; 301. Mounting ring groove; 4. First sealing member; 5. Connecting plate; 6. Second sealing member; 7. Partition plate; 701. Groove. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Combine the following Figure 1-Figure 6 The battery assembly provided in the embodiment of the present utility model is described.

[0033] Specifically, the battery assembly includes a battery cell 1 and a shell 2 .

[0034] The battery cell 1 is provided with a pole 101. Specifically, the battery cell 1 is provided with two poles 101, serving as a positive pole 101 and a negative pole 101 respectively.

[0035] The shell 2 is provided with an opening 201. The end of the battery cell 1 facing away from the pole 101 passes through the opening 201 and is placed inside the shell 2, and the end of the battery cell 1 provided with the pole 101 is arranged outside the shell 2. The battery cell 1 is sealed and connected to the opening 201 to reduce the leakage of the heat exchange medium from between the battery cell 1 and the opening 201. The shell 2 is also provided with an inlet 202 and an outlet 203. Among them, the inlet 202 of the shell 2 is used for the heat exchange medium to enter the shell 2, and the outlet 203 of the shell 2 is used for the heat exchange medium in the shell 2 to be discharged outside the shell 2. Optionally, the heat exchange medium can be cooling oil or coolant.

[0036] In this embodiment, the end of the battery cell 1 away from the pole 101 passes through the shell 2 and is placed in the shell 2. The end of the battery cell 1 provided with the pole 101 is provided outside the shell 2. A heat exchange medium can be introduced into the shell 2 through the inlet 202 of the shell 2. The heat exchange medium contacts and exchanges heat with the battery cell 1, thereby stabilizing the temperature of the battery cell 1. The heat exchange medium in the shell 2 after heat exchange with the battery cell 1 can be discharged through the outlet 203 of the shell 2.

[0037] In this arrangement, the pole 101 of the battery cell 1 is arranged outside the housing 2, so the busbar or circuit board and other components connected to the pole 101 are all arranged outside the housing 2. When repairing or maintaining these electrical components, there is no need to disassemble or open the housing 2, which makes the repair or maintenance of the electrical components more convenient. In addition, the electrical components are arranged outside the housing 2, so there is no need to improve the sealing requirements and assembly requirements of the electrical components, thereby reducing the cost of the battery assembly.

[0038] In addition, the battery assembly provided in the embodiment of the utility model can flexibly and conveniently replace the battery cell 1 after a failure of the battery cell 1. At the same time, the battery assembly is provided with an inlet 202 and an outlet 203, which facilitates the arrangement of the battery assembly in series and / or in parallel.

[0039] In some embodiments provided by the present utility model, the battery assembly further includes a sealing structure. The sealing structure is disposed between the battery cell 1 and the opening 201 and is used to seal the gap between the battery cell 1 and the opening 201. That is, the battery cell 1 is sealed and connected to the opening 201 through the sealing structure.

[0040] In this embodiment, by providing a sealing structure between the battery core 1 and the opening 201 , the sealing effect between the battery core 1 and the opening 201 can be improved, and the leakage of the heat exchange medium from between the battery core 1 and the opening 201 can be reduced.

[0041] refer to Figure 1-Figure 6 As shown, in some embodiments provided by the present invention, the sealing structure includes an annular flange 3 and a first sealing member 4 .

[0042] The annular flange 3 is connected to the housing 2 , and the annular flange 3 is extended along the edge of the opening 201 .

[0043] The first sealing member 4 is sealingly disposed between the annular flange 3 and the battery cell 1 .

[0044] In this embodiment, the annular flange 3 is provided so as to facilitate installation and fixation of the first sealing member 4 through the annular flange 3 .

[0045] Of course, the battery core 1 is not limited to being sealed and connected to the opening 201 through a sealing structure. For example, in other embodiments provided by the present utility model, the battery core 1 and the opening 201 are connected and sealed through a welding structure or an adhesive structure.

[0046] refer to Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments provided by the utility model, a connecting plate 5 is provided on the battery cell 1, for example, a mounting hole is provided on the connecting plate 5, and the battery cell 1 is inserted into the mounting hole of the connecting plate 5, that is, the connecting plate 5 is sleeved on the battery cell 1 through the mounting hole. The connecting plate 5 and the annular flange 3 are arranged opposite to each other and connected. The annular flange 3 can be arranged on the outside or inside of the opening 201. The first sealing member 4 is sealingly arranged between the annular flange 3 and the connecting plate 5.

[0047] In this embodiment, by arranging the connecting plate 5 on the battery core 1 , it is easier for the battery core 1 to clamp the first sealing member 4 through the connecting plate 5 and the annular flange 3 to achieve a sealing effect.

[0048] Optionally, a sealant is applied between the first sealing member 4 and the annular flange 3 or the connecting plate 5 to further improve the sealing effect.

[0049] In some embodiments provided by the present utility model, the battery assembly further comprises a threaded connector, which passes through the annular flange 3 , the first sealing member 4 and the connecting plate 5 , and connects the annular flange 3 , the first sealing member 4 and the connecting plate 5 .

[0050] In this embodiment, the annular flange 3, the first seal 4 and the connecting plate 5 are connected by a threaded connector, so that the connecting plate 5 and the annular flange 3 are detachable, so as to facilitate the replacement of the first seal 4 or the disassembly of the battery cell 1. In addition, the threaded connector can apply a pre-tightening force to the annular flange 3 and the connecting plate 5, so that the annular flange 3 and the connecting plate 5 can clamp the first seal 4, thereby improving the sealing effect.

[0051] Optionally, the threaded connector includes a bolt and a nut, and the bolt passes through the annular flange 3 , the first seal 4 and the connecting plate 5 and is threadedly connected to the nut, thereby connecting the annular flange 3 , the first seal 4 and the connecting plate 5 .

[0052] Of course, the annular flange 3 and the connecting plate 5 are not limited to being connected by a threaded connector. For example, the two can also be connected by bonding or welding, thereby reducing the cost of the battery assembly and improving the assembly efficiency of the battery assembly.

[0053] In some embodiments provided by the present invention, the connecting plate 5 is connected to the cover plate 102 of the battery cell 1 .

[0054] Since the pole 101 is arranged on the cover plate 102 of the battery cell 1, in this embodiment, the connecting plate 5 is connected to the cover plate 102 of the battery cell 1, so that the part of the battery cell 1 except the pole 101 can basically be located inside the shell 2, thereby increasing the contact area between the battery cell 1 and the heat exchange medium, and further improving the heat exchange effect between the heat exchange medium and the battery cell 1.

[0055] Optionally, the connecting plate 5 is welded or bonded to the cover plate 102 of the battery cell 1. For example, a through mounting hole is provided on the connecting plate 5, and the cover plate 102 of the battery cell 1 is placed in the mounting hole and welded or bonded to the mounting hole. Of course, the connecting plate 5 is not limited to being welded or bonded to the cover plate 102. For example, in other embodiments provided by the present utility model, the connecting plate 5 and the cover plate 102 of the battery cell 1 can be an integrated structure.

[0056] In some embodiments provided by the present invention, the annular flange 3 is welded or bonded to the housing 2. For example, the annular flange 3 is provided at one end of the housing 2 having the opening 201, and is bonded or welded to the housing 2. Of course, the annular flange 3 is not limited to being welded or bonded to the housing 2. For example, in other embodiments provided by the present invention, the annular flange 3 and the housing 2 are provided as an integral structure.

[0057] In some embodiments provided by the utility model, the number of battery cells 1 is set to at least two, and the battery cells 1 are all connected to the connecting plate 5. For example, the connecting plate 5 is provided with a plurality of mounting holes, and the battery cells 1 are connected to the corresponding mounting holes one by one. In this embodiment, by providing at least two battery cells 1, the energy storage capacity of the battery assembly can be improved, and the energy density of the battery assembly can be improved. In addition, by at least two battery cells 1 sharing one shell 2, the space utilization rate of the shell 2 can be improved, and the number of shells 2 used can be reduced, thereby reducing the complexity of the cooling system and potential failure points.

[0058] refer to Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments provided by the present invention, the annular flange 3 is arranged inside the opening 201, and the first seal 4 is arranged between the battery cell 1 and the annular flange 3. That is, the first seal 4 can seal the gap between the battery cell 1 and the annular flange 3.

[0059] In some embodiments provided by the utility model, the inner wall of the annular flange 3 is provided with an installation ring groove 301 for the first seal 4 to be placed in. The installation ring groove 301 can limit the first seal 4 to prevent the first seal 4 from moving and causing sealing failure.

[0060] In some embodiments provided by the present invention, reference Figure 4-Figure 6 As shown, the number of battery cells 1 is set to at least two, and the batteries are arranged in sequence. By providing at least two battery cells 1, the energy storage capacity of the battery assembly can be improved, and the energy density of the battery assembly can be improved. In addition, by at least two battery cells 1 sharing one shell 2, the space utilization rate of the shell 2 can be improved, and the number of shells 2 used can be reduced, thereby reducing the complexity of the cooling system and potential failure points.

[0061] Optionally, the battery assembly further includes a partition 7. Each battery cell 1 is provided with a first seal 4, and the first seal 4 on each battery cell 1 is placed in the mounting ring groove 301, thereby sealing the gap between the battery cell 1 and the annular flange 3. A partition 7 is provided between two adjacent battery cells 1, and the first seals 4 on the battery cells 1 are abutted against the corresponding partition 7, thereby sealing the gap between the two adjacent battery cells 1. The surface of the partition 7 in contact with the battery cell 1 is provided with a groove 701, and the groove 701 is provided for the first seal 4 on the battery cell 1 to be placed.

[0062] Of course, the first sealing member 4 is not limited to being mounted on the battery cell 1. Figure 6 As shown, in other embodiments provided by the utility model, the first seal 4 is installed in the mounting ring groove 301 and abuts against the battery cell 1, thereby sealing the gap between the battery cell 1 and the annular flange 3. The battery assembly also includes a second seal 6. A corresponding second seal 6 is provided between the battery cell 1 and the corresponding partition 7, and the second seal 6 is provided between the partition 7 and the battery cell 1 to form a seal. In this embodiment, by providing a partition 7 between two adjacent battery cells 1 and providing a second seal 6 between the partition 7 and the battery cell 1, the gap between the two adjacent battery cells 1 can be sealed, thereby reducing the leakage of the heat exchange medium from the gap between the two adjacent battery cells 1.

[0063] Furthermore, the installation position of the second sealing member 6 is opposite to the installation position of the first sealing member 4 .

[0064] Optionally, both surfaces of the partition 7 in contact with the battery cell 1 are provided with grooves 701, and the second sealing member 6 is provided as a sealing ring, which is sleeved on the partition 7, and one side of the sealing ring is placed in the groove 701 on the first side surface of the partition 7, and the other side of the sealing ring is placed in the groove 701 on the second side surface of the partition 7. In this embodiment, by providing the groove 701 on the surface of the partition 7, the second sealing member 6 can be positioned, and by providing the second sealing member 6 as a sealing ring, one second sealing member 6 can seal the gap on both sides of the partition 7.

[0065] In some embodiments provided by the utility model, at least one surface of the partition 7 in contact with the battery cell 1 is provided with a guide groove, and the extension direction of the guide groove is consistent with the extension direction of the groove 701. The guide groove is used for the heat exchange medium to flow, so that the heat exchange medium can enter between the partition 7 and the battery cell 1, thereby increasing the contact area between the battery cell 1 and the heat exchange medium, and further improving the heat exchange effect between the heat exchange medium and the battery cell 1.

[0066] In some embodiments provided by the present invention, the inlet 202 and the outlet 203 are respectively arranged on two opposite side walls of the shell 2. Such an arrangement enables the heat exchange medium to flow smoothly in the shell 2, reducing the number of flow dead zones.

[0067] Furthermore, the height of the inlet 202 is lower than the height of the outlet 203 , so that the newly-entered heat exchange medium slowly flows through the battery cell 1 and then flows out.

[0068] In some embodiments provided by the present invention, a connecting lug is provided at the bottom of the shell 2, and the lug is provided with a through hole so as to be connected to the outer shell of the battery pack by passing a bolt through the through hole.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A battery assembly, characterized in that: include: A battery cell having a pole; The shell is provided with an opening, the end of the battery cell facing away from the pole passes through the opening and is placed inside the shell, the end of the battery cell provided with the pole is arranged outside the shell, the battery cell is sealed and connected to the opening, and the shell is also provided with an inlet for heat exchange medium to enter and an outlet for heat exchange medium to discharge.

2. The battery assembly according to claim 1, characterized in that: The battery assembly further includes a sealing structure, which is disposed between the battery cell and the opening and is used to seal a gap between the battery cell and the opening.

3. The battery assembly according to claim 2, characterized in that: The sealing structure comprises: an annular flange, the annular flange is connected to the shell, and the annular flange is extended along the edge of the opening; A first seal is provided between the annular flange and the battery cell.

4. The battery assembly according to claim 3, characterized in that: The battery core is provided with a connecting plate, the connecting plate and the annular flange are arranged opposite to each other and connected, and the first sealing member is sealingly arranged between the annular flange and the connecting plate.

5. The battery assembly according to claim 4, characterized in that: The battery assembly further includes a threaded connector, which passes through the annular flange, the first seal, and the connecting plate, and connects the annular flange, the first seal, and the connecting plate.

6. The battery assembly according to claim 4, characterized in that: The connecting plate is connected to the battery core.

7. The battery assembly according to claim 4, characterized in that: The number of the battery cells is set to at least two, and the battery cells are all connected to the connecting plate.

8. The battery assembly according to claim 3, characterized in that: The annular flange is arranged on the inner side of the opening, and the first sealing member is arranged between the battery core and the annular flange.

9. The battery assembly according to claim 8, characterized in that: The inner wall of the annular flange is provided with a mounting annular groove for the first sealing member to be placed therein.

10. The battery assembly according to any one of claims 1 to 9, characterized in that: The inlet and the outlet are respectively arranged on two opposite side walls of the housing.

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