A battery module and a battery

Abstract

This utility model discloses a battery module and a battery. The battery module includes: a tray assembly having at least one positioning pin; and at least one battery cell, each battery cell having a hollow channel in its middle, the hollow channel having a first end and a second end disposed opposite to each other, and each positioning pin passing through the first end and extending into the interior of the hollow channel. By applying this utility model, a battery module structure with simple assembly and precise positioning is provided. The tray assembly provides positioning pins to guide and position the insertion and installation of the battery cells, and the insertion of fixing pins at the top cover further secures the battery cells and achieves heat conduction. This greatly reduces the number of parts used, optimizes the assembly process of the battery module, improves the assembly efficiency and quality of the battery module, thereby ensuring the quality of the finished battery and reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module and a battery. Background Technology

[0002] Currently, with the rapid development of new energy vehicles, the integration requirements for battery packs are becoming increasingly higher. In order to meet this integration requirement, some battery packs on the market have chosen a modular approach and use adhesive bonding to connect the internal components of the battery module. However, the corresponding manufacturing process requirements are becoming increasingly complex and precise, especially in the assembly process of the battery module.

[0003] Existing technologies, such as the Chinese patent CN202121610427.5, often employ a bracket at the bottom of the module when assembling battery modules containing cylindrical cells. This bracket features at least partially arc-shaped grooves to provide mounting constraints on the lower end of the cells. Furthermore, to meet the heat dissipation requirements of the cells, horizontally extending liquid cooling plates are arranged between adjacent rows of cells. However, such battery module structures often suffer from unstable relative positions and gaps between structures due to dimensional tolerances in the cells and liquid cooling plates. This can negatively impact subsequent busbar welding. Additionally, the cooling capacity of the liquid cooling plates is limited because they only contact a small area on the circumferential side of the cells, and the numerous liquid cooling joints pose a significant risk of leakage. In particular, the assembly of such battery modules involves a large number of parts, resulting in low assembly efficiency and requiring further improvement in assembly quality. Utility Model Content

[0004] In view of this, and to solve the above problems, the purpose of this utility model is to provide a battery module, comprising:

[0005] A tray assembly having at least one locating pin;

[0006] At least one battery cell, each of which has a hollow channel in the middle, the hollow channel having a first end and a second end disposed opposite to each other, and each of which has a positioning pin passing through the first end and extending into the interior of the hollow channel.

[0007] In another preferred embodiment, it further includes: a top cover having at least one retaining pin, each of the retaining pins passing through the second end and extending into the interior of the hollow channel.

[0008] In another preferred embodiment, the top cover includes a heat-conducting structure, the fixing pin is connected to the heat-conducting structure, and a heat conduction is formed between the fixing pin and the heat-conducting structure.

[0009] In another preferred embodiment, the hollow channel is filled with thermally conductive structural adhesive.

[0010] In another preferred embodiment, the top cover further includes a bus assembly disposed on the heat-conducting structure, and each of the battery cells is electrically connected to the bus assembly.

[0011] In another preferred embodiment, the top cover further includes a cover plate disposed on the side of the heat-conducting structure away from the tray assembly.

[0012] In another preferred embodiment, the heat-conducting structure includes: a plate, a cooling element and / or a heating element, wherein the cooling element and / or the heating element is disposed within the plate.

[0013] In another preferred embodiment, the tray assembly includes a lower tray and an upper tray, the upper tray being disposed above the lower tray, the upper tray having at least one mounting groove, the inner contour of the mounting groove matching the outer contour of the battery cell, one end of the positioning pin being connected to the lower tray, and the other end of the positioning pin extending into the mounting groove.

[0014] In another preferred embodiment, an exhaust channel is formed within the lower tray, and the exhaust channel is configured to communicate with the interior of the mounting groove.

[0015] The purpose of this utility model is also to provide a battery, including any of the battery modules described above.

[0016] Because this utility model adopts the above-mentioned technical solution, it has the following positive effects compared with the prior art:

[0017] By applying this utility model, a battery module structure that is simple to assemble and has precise positioning is provided. It uses a tray assembly to provide positioning pins to guide and position the insertion and installation of the battery cells, and uses the insertion of fixing pins at the top cover to further fix the battery cells and realize the heat conduction function. This greatly reduces the number of parts used, optimizes the battery module assembly process, improves the assembly efficiency and quality of the battery module, and thus ensures the quality of the finished battery and reduces production costs. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of a battery module according to the present invention;

[0019] Figure 2 This is an exploded view of a battery module according to the present invention;

[0020] Figure 3This is a schematic diagram of the positioning pin mating of a battery module according to the present invention;

[0021] Figure 4 This is a schematic diagram of the mounting of the top cover of a battery module according to the present invention;

[0022] Figure 5 This is a schematic diagram of the fixing pin assembly of a battery module according to the present invention.

[0023] In the attached image:

[0024] 1. Tray assembly; 2. Positioning pin; 3. Battery cell; 4. Hollow channel; 5. First end; 6. Second end; 7. Top cover; 8. Fixing pin; 9. Thermally conductive structure; 10. Thermally conductive structural adhesive; 11. Busbar assembly; 12. Cover plate; 13. Lower tray; 14. Upper tray; 15. Mounting groove; 16. Exhaust channel; 17. Cylinder structure; 18. Reinforcing rib; 19. Structural adhesive layer; 20. Welding area. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0028] like Figures 1 to 5The diagram illustrates a preferred embodiment of a battery module, comprising: a tray assembly 1 having at least one positioning pin 2; and at least one battery cell 3, each battery cell 3 having a hollow channel 4 in its center, the hollow channel 4 having a first end 5 and a second end 6 disposed opposite to each other, and each positioning pin 2 passing through the first end 5 and extending into the interior of the hollow channel 4. Further, during the assembly of this battery module, a specified number of positioning pins 2 are pre-set on the tray assembly 1, and then, through the hollow channel 4 pre-reserved in the center of the battery cell 3, the battery cell 3 is inserted into the tray assembly 1 along the extending direction of the positioning pin 2. During this process, the positioning pin 2 gradually extends into the hollow channel 4, thereby guiding and positioning the battery cell 3 during installation, thus optimizing the precise installation of the battery cell 3 relative to the tray assembly 1.

[0029] Furthermore, as a preferred embodiment, a plurality of positioning pins 2 are arranged in an array on the tray assembly 1, and the plurality of positioning pins 2 are arranged in parallel to each other, and each positioning pin 2 is inserted into the hollow channel 4 of a battery cell 3.

[0030] Furthermore, as a preferred embodiment, the battery cell 3 is preferably a cylindrical battery cell with a hollow channel 4 reserved along the axial direction at its center. The hollow channel 4 is preferably in the form of a cylindrical tube. The first end 5 is preferably the lower end of the hollow channel 4 of the battery cell 3 along the axial direction, and the second end 6 is preferably the upper end of the hollow channel 4 of the battery cell 3 along the axial direction.

[0031] Furthermore, as a preferred embodiment, it further includes: an upper cover 7, the upper cover 7 having at least one fixing pin 8, each fixing pin 8 passing through the second end 6 and extending into the interior of the hollow channel 4. Further, the upper cover 7 covers the upper portion of the battery cells 3, and after the battery cells 3 are assembled on the tray assembly 1, the upper cover 7 is installed from top to bottom such that the fixing pin 8 is inserted from the second end 6 of the battery cell 3 into the hollow channel 4 of the battery cell 3.

[0032] Furthermore, as a preferred embodiment, a plurality of fixing pins 8 are arranged in an array on the upper cover 7, and each fixing pin 8 corresponds to a positioning pin 2.

[0033] Furthermore, as a preferred embodiment, the fixing pin 8 and the positioning pin 2 are preferably arranged in a columnar or tubular structure, and the radial outer contours of the fixing pin 8 and the positioning pin 2 are matched with the radial inner contours of the hollow channel 4.

[0034] Furthermore, as a preferred embodiment, the sum of the axial lengths of the fixing pin 8 and the positioning pin 2 is preferably less than or equal to the axial length of the hollow channel 4.

[0035] Furthermore, in a preferred embodiment, the top cover 7 includes a heat-conducting structure 9, with a fixing pin 8 connected to the heat-conducting structure 9, and heat conduction occurring between the fixing pin 8 and the heat-conducting structure 9. Furthermore, the heat-conducting structure 9 enables the top cover 7 to at least partially transfer heat from the battery cell 3, particularly through the heat conduction of the fixing pin 8, which directly transfers the internal heat of the battery cell 3 to the outside via the fixing pin 8 and the heat-conducting structure 9, thereby facilitating temperature control of the battery cell 3.

[0036] Furthermore, as a preferred embodiment, the hollow channel 4 contains a thermally conductive structural adhesive 10. Further, by injecting the thermally conductive structural adhesive 10 into the hollow channel 4, the gap between the positioning pin 2 and the fixing pin 8, as well as the gap between the positioning pin 2 and the fixing pin 8 and the hollow channel 4 respectively, is filled. This strengthens the connection between the fixing pin 8 and the positioning pin 2 and the battery cell 3, and also participates in forming a heat conduction path from the battery cell 3 to the thermally conductive structure 9. In actual operation, the thermally conductive structural adhesive 10 can be injected after the positioning pin 2 is placed in the hollow channel 4, and then the thermally conductive structure 9 is installed, allowing the fixing pin 8 to be inserted into the hollow channel 4 containing the thermally conductive structural adhesive 10, thereby completely filling the aforementioned gaps.

[0037] Furthermore, as a preferred embodiment, the thermally conductive structural adhesive 10 can be formed by injecting the corresponding adhesive after the positioning pin 2 is assembled, or by pre-forming an adhesive structure with a predetermined shape and inserting it into the hollow channel 4.

[0038] Furthermore, in a preferred embodiment, the upper cover 7 further includes a bus assembly 11, which is disposed on the heat-conducting structure 9, and each battery cell 3 is electrically connected to the bus assembly 11. Further, the bus assembly 11 is pre-assembled at a position on the lower surface of the heat-conducting structure 9, preferably as an embedded structure, and the bus assembly 11 has at least a plurality of solderable portions for soldering to the corresponding battery cell 3.

[0039] Furthermore, as a preferred embodiment, the lower end of the bus assembly 11 is preferably flush with the lower end of the heat-conducting structure 9, so as to facilitate the assembly of the entire heat-conducting structure 9 and the bus assembly 11 together onto the upper part of the battery cell 3.

[0040] Furthermore, as a preferred embodiment, the upper cover 7 further includes a cover plate 12, which is disposed on the side of the heat-conducting structure 9 away from the tray assembly 1. Further, the cover plate 12 is preferably made of an insulating material, and preferably a heat-resistant resin board.

[0041] Furthermore, as a preferred embodiment, one side surface of the cover plate 12 is preferably provided with adhesive backing, and the cover plate 12 is bonded to the heat-conducting structure 9 by the adhesive backing. Furthermore, the adhesive backing of the cover plate 12 can be positioned appropriately to cover the welding area 20, so as to minimize the possibility of condensation entering the welding area 20.

[0042] Furthermore, as a preferred embodiment, the cover plate 12 can also be replaced with an insulating coating that is directly disposed on the upper surface of the heat-conducting structure 9.

[0043] Furthermore, as a preferred embodiment, the thermally conductive structure 9 includes: a plate, a cooling element, and / or a heating element, wherein the cooling element and / or heating element are disposed within the plate. Further, the above and / or can be considered as having at least one of the cooling element and heating element attached to the plate, with the plate serving as the base; wherein the plate acts as a carrier for the cooling element and / or heating element, the plate is made of a thermally conductive material, the cooling element is used to transfer heat from the battery cell 3 outwards for cooling, and the heating element is used to heat the battery cell 3 for heating.

[0044] Furthermore, as a preferred embodiment, the plate is preferably a liquid-cooled plate, and the cooling element is preferably a liquid-cooled channel integrally formed within the liquid-cooled plate.

[0045] Furthermore, as a preferred embodiment, the heating element is preferably connected in communication with the vehicle's thermal management system so that during low-temperature cold starts or low-temperature charging, the heating element can quickly and efficiently heat the battery so that its temperature is in a suitable operating state.

[0046] Furthermore, as a preferred embodiment, the heating element is preferably an induction coil, which is embedded in the plate and heats the battery cell 3 through the principle of electromagnetic induction.

[0047] Furthermore, as a preferred embodiment, the plate preferably has a welding area 20 with an open structure. The welding area 20 is provided through at least along the thickness direction of the plate so that an external device can pass through the welding area 20 to weld the busbar assembly 11 to the battery cell 3. The external device is preferably a laser welding device.

[0048] Furthermore, as a preferred embodiment, the inner contour of the opening structure is preferably arc-shaped.

[0049] Furthermore, in a preferred embodiment, the tray assembly 1 includes a lower tray 13 and an upper tray 14. The upper tray 14 is disposed above the lower tray 13 and has at least one mounting groove 15. The inner contour of the mounting groove 15 matches the outer contour of the battery cell 3. One end of the positioning pin 2 is connected to the lower tray 13, and the other end of the positioning pin 2 extends into the mounting groove 15. Further, the lower tray 13 provides a mounting base for the positioning pin 2, and the upper tray 14 accommodates the battery cell 3 peripherally through the mounting groove 15.

[0050] Furthermore, as a preferred embodiment, the upper tray 14 and the lower tray 13 are connected by a structural adhesive layer 19, which is provided with clearance holes that match the positioning pin 2.

[0051] Furthermore, as a preferred embodiment, the lower tray 13 can be a die-cast part, a sheet metal stamping part, or a high-strength composite material extrusion part, etc.

[0052] Furthermore, as a preferred embodiment, the lower tray 13 is preferably an extruded aluminum tray.

[0053] Furthermore, as a preferred embodiment, the upper tray 14 is preferably a plastic tray.

[0054] Furthermore, as a preferred embodiment, the lower tray 13 and the positioning pin 2 can preferably be fixedly connected by riveting, bonding, or welding, so that the lower tray 13 and the positioning pin 2 form a whole.

[0055] Furthermore, as a preferred embodiment, the lower tray 13 and the positioning pin 2 can preferably be an integrally formed structure.

[0056] Furthermore, as a preferred embodiment, the aforementioned integral molding structure can be formed on the lower tray 13 by injection molding, thereby making the lower tray 13 and the upper tray 14 form a single integral part.

[0057] Furthermore, as a preferred embodiment, the lower end of the upper tray 14 may be provided with a plurality of downwardly protruding guide posts, and the upper end of the lower tray 13 may be provided with a plurality of guide holes, in which the guide posts may be inserted to form an installation guide between the upper tray 14 and the lower tray 13.

[0058] Furthermore, as a preferred embodiment, the upper tray 14 includes: a plurality of cylindrical structures 17 and reinforcing ribs 18. The plurality of cylindrical structures 17 are arranged in an array along the horizontal direction and connected to each other by the reinforcing ribs 18. Each cylindrical structure 17 has an installation groove 15 formed inside.

[0059] Furthermore, as a preferred embodiment, the plurality of cylindrical structures 17 are preferably arranged as an integral structure, that is, each pair of adjacent cylindrical structures 17 along the horizontal or longitudinal direction are integrally connected.

[0060] Furthermore, as a preferred embodiment, the upper end of the cylindrical structure 17 is open to facilitate the insertion of the battery cell 3, and the lower end of the cylindrical structure 17 is also open to at least facilitate the passage of the positioning pin 2 from bottom to top.

[0061] Furthermore, in a preferred embodiment, an exhaust channel 16 is formed within the lower tray 13, and the exhaust channel 16 is internally connected to the mounting groove 15. Furthermore, in the event of thermal runaway in the battery cell 3, its high-temperature gases can be quickly discharged through the exhaust channel 16, and with the cooperation of the heat-conducting structure 9, it also facilitates the rapid outward transfer of a large amount of heat in a short period, preventing heat accumulation and thus avoiding a related reaction in other battery cells 3.

[0062] Furthermore, as a preferred embodiment, the number of exhaust channels 16 is preferably several, and the several exhaust channels 16 are preferably arranged in parallel. The bottom of the mounting slot 15 where the several battery cells 3 are arranged in the same row are all connected to the same exhaust channel 16.

[0063] Furthermore, as a preferred embodiment, the upper surface of the lower tray 13 forms an exhaust channel 16 that communicates with the mounting groove 15 through an opening.

[0064] Furthermore, as a preferred embodiment, each adjacent exhaust channel 16 is separated by a transverse rib to prevent associated thermal runaway of cells 3 between adjacent rows.

[0065] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model.

[0066] Based on the above, this utility model also has the following embodiments:

[0067] In a further embodiment of the present invention, a battery includes a battery module comprising any one of the above-described components.

[0068] In a further embodiment of this utility model, the battery further includes a housing, and the battery module is disposed inside the housing.

[0069] In a further embodiment of this invention, the battery is preferably used to provide power for a new energy vehicle.

[0070] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery module, characterized in that, include: A tray assembly having at least one locating pin; At least one battery cell, each of which has a hollow channel in the middle, the hollow channel having a first end and a second end disposed opposite to each other, and each of which has a positioning pin passing through the first end and extending into the interior of the hollow channel.

2. The battery module according to claim 1, characterized in that, Also includes: The upper cover has at least one fixing pin, each of which passes through the second end and extends into the interior of the hollow channel.

3. The battery module according to claim 2, characterized in that, The top cover includes a heat-conducting structure, the fixing pin is connected to the heat-conducting structure, and heat conduction is formed between the fixing pin and the heat-conducting structure.

4. The battery module according to claim 1 or 3, characterized in that, The hollow channel is filled with thermally conductive structural adhesive.

5. The battery module according to claim 3, characterized in that, The top cover also includes a busbar assembly, which is disposed on the heat-conducting structure, and each of the battery cells is electrically connected to the busbar assembly.

6. The battery module according to claim 3, characterized in that, The top cover further includes a cover plate disposed on the side of the heat-conducting structure away from the tray assembly.

7. The battery module according to claim 3, characterized in that, The heat-conducting structure includes: a plate, a cooling element and / or a heating element, wherein the cooling element and / or the heating element are disposed within the plate.

8. The battery module according to claim 1, characterized in that, The tray assembly includes a lower tray and an upper tray. The upper tray is disposed above the lower tray. The upper tray has at least one mounting groove. The inner contour of the mounting groove matches the outer contour of the battery cell. One end of the positioning pin is connected to the lower tray, and the other end of the positioning pin extends into the mounting groove.

9. The battery module according to claim 8, characterized in that, An exhaust channel is formed inside the lower tray, and the exhaust channel is connected to the interior of the mounting groove.

10. A battery, characterized in that, The battery module includes any one of claims 1 to 9.

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