Multilayer mortise and tenon type battery module

Abstract

The utility model discloses a multi-layer mortise and tenon type battery module which comprises a plurality of stacked single-layer battery cell modules, the single-layer battery cell modules are connected through screws in a penetrating mode, mortise and tenon structures are arranged between the adjacent single-layer battery cell modules, and each single-layer battery cell module comprises a lower module support and an upper module support. The lower module support and the upper module support are correspondingly provided with battery cell holes and are provided with battery cells, the tenon-and-mortise structure comprises a tenon and a mortise hole, the top of the tenon is provided with a mounting inclined surface, so that the tenon and the mortise hole can be conveniently aligned and connected, and when single-layer battery cell modules are mounted, the reduction of personal errors in the assembly process is facilitated, the production efficiency is improved, and the production cost is reduced. And meanwhile, a mortise and tenon joint structure and screw fastening combination mode is adopted, so that the structural strength is enhanced, and the stability and reliability of the battery cell module in the long-term use process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a multi-layer mortise and tenon type battery module. Background Art

[0002] A battery module is composed of multiple cells. The module not only improves the voltage and capacity of the battery, but also is equipped with a battery management system to monitor and protect the cells. The cells in the module are connected in series or parallel to meet different power requirements. At the same time, battery modules are widely used in fields such as electric vehicles and energy storage systems, providing efficient and safe power solutions. In the design and manufacture of battery modules, the fixing structure is one of the key factors to ensure the stable and safe operation of the battery cells. Traditional battery module fixing methods mostly use a single method such as screw fastening, welding or bonding. In the prior art, for example, patent CN218498239U discloses an energy storage battery module, which includes a plurality of battery cell brackets, which are stacked layer by layer to form a bracket layer in an array in the stacking direction, and two side end plates that clamp the bracket layer in the stacking direction. Screws are respectively inserted through the second through hole of one side end plate, the first through hole of the battery cell bracket, and the second through hole of the other side end plate in the stacking direction to achieve screw fixation of the battery module. However, a single fixing method is not conducive to further improving the stability and reliability of the battery module during long-term use. Utility Model Content

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a multi-layer mortise and tenon type battery module.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A multi-layer mortise and tenon battery module includes several stacked single-layer battery cell modules, which are connected by screws. A mortise and tenon structure is provided between adjacent single-layer battery cell modules. The mortise and tenon structure includes a tenon and a mortise hole. The top of the tenon is provided with an installation bevel, which facilitates the alignment and connection between the tenon and the mortise hole. The single-layer battery cell module includes a lower module bracket and an upper module bracket. The lower module bracket and the upper module bracket are correspondingly provided with battery cell holes and installed with battery cells.

[0006] In certain embodiments of the present invention, the screw rods are arranged along the stacking direction of the single-layer battery core modules, and the lower module bracket and the upper module bracket are respectively provided with screw rod holes corresponding to the screw rods.

[0007] In certain embodiments of the present invention, the tenon is coaxially arranged with the corresponding mortise and screw hole, and the screw hole passes through the tenon.

[0008] In certain embodiments of the present invention, the tenon includes a connecting column, the upper portion of the connecting column is configured as a frustum, the mounting slope is the side surface of the frustum, and the screw hole extends from the bottom of the connecting column to the upper bottom of the frustum.

[0009] In certain embodiments of the present invention, any single-layer battery cell module located at an end is electrically connected to an MT60 plug connector.

[0010] In certain embodiments of the present invention, a limiting slot is provided on the side of the single-layer battery cell module.

[0011] In certain embodiments of the present invention, the battery core hole is a through hole, nickel sheets are arranged at both ends of the battery core, and epoxy plates are provided on the outside of the nickel sheets.

[0012] In certain embodiments of the present invention, the nickel sheet is connected to a copper busbar, and adjacent single-layer battery core modules are electrically connected via the copper busbar.

[0013] In certain embodiments of the present invention, the copper busbar is provided with a bent portion perpendicular to the nickel sheet, and a placement groove is provided on the side surface of the single-layer battery module corresponding to the bent portion.

[0014] In certain embodiments of the present invention, an NTC thermistor is installed on one side of the bent portion.

[0015] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. A multi-layer battery cell module fixing structure is provided, which adopts a combination of mortise and tenon structure and screw fastening to strengthen the structural strength, which helps to improve the overall accuracy of the multi-layer module and ensure the stability and reliability of the battery cell module during long-term use. At the same time, the structure is simple and reasonable, which is convenient for mass production.

[0017] 2. The mortise and tenon structure includes a tenon and a mortise. A mounting slope is provided on the top of the tenon to facilitate alignment and connection between the tenon and the mortise. When installed between each single-layer battery cell module, it is beneficial to reduce human errors in the assembly process and improve production efficiency.

[0018] 3. Adjacent single-layer battery modules are electrically connected through copper busbars. An NTC thermistor is installed on one side of the copper busbar. The NTC thermistor is used for temperature detection, which helps to ensure the safety of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a single-layer battery cell module of the present invention;

[0021] Figure 2 For the utility model Figure 1 A magnified view of;

[0022] Figure 3 It is a structural diagram of the utility model;

[0023] Figure 4 This is a schematic diagram of the installation of the battery cell of the present utility model;

[0024] Figure 5 This is a schematic diagram of the installation of the NTC thermistor of the present utility model;

[0025] Description of main reference numerals:

[0026] 1. Single-layer battery cell module, 10. Lower module bracket, 11. Upper module bracket, 12. Battery cell hole, 13. Machine screw, 14. Limiting slot, 15. Groove, 16. Limiting part, 17. Placement slot, 2. Screw, 20. Screw hole, 3. Tenon, 30. Mounting slope, 4. Mortise, 5. Battery cell, 50. Epoxy board, 51. Negative nickel sheet, 52. Positive nickel sheet, 53. Limiting hole, 54. Bending part, 6. NTC thermistor DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.

[0029] In the claims, specification and the above-mentioned drawings of the present utility model, unless otherwise expressly defined, directional words, such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships are based on the directions and positional relationships 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 direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0030] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, any connection method without any displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0031] In the claims, description and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0032] See also Figure 1-5 :

[0033] A multi-layer mortise and tenon battery module includes several stacked single-layer battery cell modules 1. Each single-layer battery cell module 1 is connected by a screw 2. A mortise and tenon structure is provided between adjacent single-layer battery cell modules 1. A combination of the mortise and tenon structure and the screw 2 is adopted for fastening. When dealing with the fixation of multi-layer battery modules, the long-term reliability is good.

[0034] The mortise and tenon structure includes a tenon 3 and a mortise 4. A mounting bevel 30 is provided on the top of the tenon 3, so that the mounting bevel 30 facilitates the alignment and connection between the tenon 3 and the mortise 4. When installed between each single-layer battery cell module 1, the tenon 3 is installed in position with the assistance of the mounting bevel 30, which reduces human errors in the assembly process and is conducive to improving production efficiency.

[0035] It can be understood that the screw rod 2 is arranged along the stacking direction of the single-layer battery cell module 1, and the end of the screw rod 2 is fastened with a nut.

[0036] The single-layer battery module 1 includes a lower module support 10 and an upper module support 11. The lower module support 10 and the upper module support 11 are respectively provided with battery holes 12 and are installed with battery cells 5. The lower module support 10 and the upper module support 11 are connected by fasteners.

[0037] Preferably, the fastener is a machine screw 13.

[0038] As an embodiment, the lower mold bracket 10 and the upper mold bracket 11 are respectively provided with screw holes 20 corresponding to the screws 2; preferably, two screw holes 20 are respectively arranged on the left and right sides of the lower mold bracket 10 and the upper mold bracket 11.

[0039] As an embodiment, the tenon 3 , the mortise 4 and the screw hole 20 are coaxially arranged, and the screw hole 20 passes through the tenon 3 , so as to facilitate the assembly and connection between the single-layer battery core modules 1 .

[0040] Specifically, the tenon 3 includes a connecting column, the upper portion of the connecting column is configured as a frustum, the mounting slope 30 is the side surface of the frustum, and the screw hole 20 passes through the bottom of the connecting column to the upper bottom of the frustum.

[0041] Preferably, the tenon 3 is arranged on the lower mold support 10 , the tenon 3 and the lower mold support 10 are integrally formed, and the mortise 4 is correspondingly arranged on the upper mold support 11 .

[0042] In one embodiment, the cell hole 12 is a through hole, and nickel sheets are respectively arranged at both ends of the cell 5, and epoxy plates 50 are provided on the outside of the nickel sheets. Specifically, the nickel sheets include a negative nickel sheet 51 and a positive nickel sheet 52. The negative nickel sheet 51 is arranged on the outside of the lower module bracket 10 and is connected to the negative electrode of the cell 5. The positive nickel sheet 52 is arranged on the outside of the upper module bracket 11 and is connected to the positive electrode of the cell 5.

[0043] As an embodiment, a limiting hole 53 is provided on the nickel sheet, and the upper mold bracket 11 and the lower mold bracket 10 are respectively provided with limiting portions 16 corresponding to the limiting holes 53 of the nickel sheet, so as to facilitate the limited installation of the nickel sheet.

[0044] It is understandable that the epoxy plate 50 and the nickel sheet are arranged to avoid the screw hole 20, and the upper mold bracket 11 and the lower mold bracket 10 are respectively provided with placement recesses corresponding to the nickel sheet to facilitate the placement of the nickel sheet.

[0045] As an embodiment, the nickel sheet is connected to a copper busbar, and adjacent single-layer battery cell modules 1 are electrically connected through the copper busbar. Specifically, the copper busbar includes a positive copper busbar and a negative copper busbar. The positive nickel sheet 52 is connected to the positive copper busbar, and the negative nickel sheet 51 is connected to the negative copper busbar. The positive copper busbar of the single-layer battery cell module 1 located on the lower side is connected to the negative copper busbar of the single-layer battery cell module 1 located on the upper side.

[0046] As an embodiment, the copper busbar is provided with a bend 54 perpendicular to the nickel sheet, so that adjacent single-layer battery modules 1 are electrically connected via the bend 54 of the copper busbar. The side surfaces of the single-layer battery modules 1 are provided with placement grooves 15 corresponding to the bend 54. Preferably, the grooves 15 are staggered on both sides of each single-layer battery module to help disperse heat and prevent heat accumulation.

[0047] As an embodiment, any single-layer battery cell module 1 located at the end is electrically connected to an MT60 plug connector and a battery management unit.

[0048] As an embodiment, a limit slot 14 is provided on the side of the single-layer battery module 1. Preferably, the limit slot 14 is arranged on the upper side or the lower side of the groove 15, and there are two limit slots 14, and any limit slot 14 is used for the wiring harness to pass through.

[0049] As an embodiment, an NTC thermistor 6 is installed on one side of the bent portion, and the NTC thermistor 6 is used to detect temperature.

[0050] Preferably, the upper mold support 11 forms a placement groove 17, and the placement groove 17 is used to install the NTC thermistor 6. The placement groove 17 is arranged on one side of the bent portion 54 of the copper busbar.

[0051] The above description and embodiments are used to explain the scope of protection of the utility model, but do not constitute a limitation on the scope of protection of the utility model. Based on the enlightenment of the utility model or the above embodiments, modifications, equivalent replacements, or other improvements to the embodiments of the utility model or part of the technical features thereof that can be obtained by ordinary technicians in this field through logical analysis, reasoning, or limited experiments in combination with common knowledge, ordinary technical knowledge in this field and / or existing technology should be included in the scope of protection of the utility model.

Claims

1. A multi-layer mortise and tenon type battery module, characterized in that: It includes several stacked single-layer battery cell modules, which are connected by screws. A mortise and tenon structure is provided between adjacent single-layer battery cell modules. The mortise and tenon structure includes a tenon and a mortise hole. The top of the tenon is provided with an installation bevel, which facilitates the alignment and connection between the tenon and the mortise hole. The single-layer battery cell module includes a lower module bracket and an upper module bracket. The lower module bracket and the upper module bracket are correspondingly provided with battery cell holes and installed with battery cells.

2. The multi-layer mortise and tenon type battery module according to claim 1, characterized in that: The screw rods are arranged along the stacking direction of the single-layer battery core modules, and the lower module bracket and the upper module bracket are respectively provided with screw rod holes corresponding to the screw rods.

3. The multi-layer mortise and tenon type battery module according to claim 2, characterized in that: The tenon is coaxially arranged with the corresponding mortise hole and screw hole, and the screw hole passes through the tenon.

4. The multi-layer mortise and tenon type battery module according to claim 3, characterized in that: The tenon includes a connecting column, the upper part of the connecting column is set as a frustum, the mounting inclined surface is the side surface of the frustum, and the screw hole runs through the bottom of the connecting column to the upper bottom of the frustum.

5. The multi-layer mortise and tenon type battery module according to claim 1, characterized in that: Any single-layer battery cell module located at the end is electrically connected to an MT60 plug connector.

6. The multi-layer mortise and tenon type battery module according to claim 1, characterized in that: A limiting slot is provided on the side of the single-layer battery core module.

7. A multi-layer mortise and tenon type battery module according to any one of claims 1 to 6, characterized in that: The battery core hole is a through hole, and nickel sheets are arranged at both ends of the battery core, and epoxy plates are arranged on the outside of the nickel sheets.

8. The multi-layer mortise and tenon type battery module according to claim 7, characterized in that: The nickel sheet is connected to a copper busbar, and adjacent single-layer battery core modules are electrically connected via the copper busbar.

9. The multi-layer mortise and tenon type battery module according to claim 8, characterized in that: The copper busbar is perpendicular to the nickel sheet and is provided with a bending portion, and a placement groove is provided on the side surface of the single-layer battery module corresponding to the bending portion.

10. The multi-layer mortise and tenon type battery module according to claim 9, characterized in that: An NTC thermistor is installed on one side of the bent portion.

Images