High-reliability energy storage secondary battery module

Abstract

The utility model discloses a high-reliability energy storage secondary battery module which comprises a shell, a plurality of battery cells which are connected in series and in parallel are arranged in the shell, the adjacent battery cells are flexibly connected and fixed on the inner wall of the shell through elastic bridging pieces, and each elastic connecting piece comprises a concave positioning part and elastic bridging parts on the two sides. And the outer side of the elastic bridging part is attached to the surface of the battery cell. The high-reliability energy storage secondary battery module disclosed by the utility model has the characteristics of high reliability, convenience in assembly and good fixing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary batteries, in particular to a high-reliability energy storage secondary battery module. Background Art

[0002] Secondary batteries, also known as rechargeable batteries, are batteries that can be reverse-charged with an electric current to restore their energy. Unlike primary (non-rechargeable) batteries, secondary batteries can be charged and discharged multiple times, giving them a longer lifespan.

[0003] Energy storage secondary battery modules typically consist of multiple battery cells connected in series or parallel to meet specific voltage and capacity requirements. Within energy storage secondary battery modules, housings and brackets provide physical protection and structural support.

[0004] In existing energy storage secondary battery modules, the battery cell poles are laser welded or screwed, and the connection between the battery cells is flat. When the battery module is charged and discharged, the battery cells expand and bulge due to heat, and the distance between the battery cell poles will increase. In this way, tensile shear force will be generated at the laser welding or screwing points, and there is a risk of breakage. Utility Model Content

[0005] The purpose of the utility model is to provide a high-reliability energy storage secondary battery module, which has the characteristics of high reliability, convenient assembly and good fixing effect.

[0006] The utility model can be realized by the following technical solutions:

[0007] The utility model discloses a high-reliability energy storage secondary battery module, comprising a shell, wherein the shell comprises a plurality of battery cells connected in series and parallel, and the battery cells adjacent to each other are flexibly connected and fixed on the inner wall of the shell through elastic bridge pieces, and the elastic bridge pieces comprise an inner concave positioning portion and elastic bridge parts on both sides, and the outer sides of the elastic bridge parts are in contact with the surface of the battery cells.

[0008] Furthermore, the width of the recessed positioning portion is consistent with the gap between two adjacent battery cells, and a positioning hole is provided inside the recessed positioning portion. This not only ensures that there is sufficient gap between the battery cells to meet the needs of thermal expansion and contraction, but also fully utilizes the gap between the battery cells, and also ensures the packaging effect of fixing to the other side of the housing through the positioning hole.

[0009] Furthermore, the elastic bridge portions are bent at right angles on both sides of the recessed positioning portion, with the height of the right-angle bends being consistent with the thickness of the battery cell. This not only fully fits the battery cell to enhance the fixation effect, but also forms an elastic buffer space on the surface of the battery cell to prevent positional deviation caused by battery heating and expansion.

[0010] Furthermore, the elastic bridging sheet is a copper sheet or an aluminum sheet, which has both good elasticity and excellent thermal conductivity.

[0011] Furthermore, adjacent elastic bridge pieces are staggered and relatively arranged at the upper and lower parts of the battery cells, so as to elastically clamp and fix the battery cells at different positions for protection, thereby improving the reliability of protection.

[0012] Furthermore, the secondary battery pack also includes a positive electrode and a negative electrode. The positive electrode is electrically connected to the positive electrode post outside the housing via a positive electrode connector, and the negative electrode is electrically connected to the negative electrode post outside the housing via a negative electrode connector. No adjustment is required to the existing positive and negative electrode connection structure.

[0013] Furthermore, the secondary battery is a sodium ion battery or a lithium ion battery, which meets the usage requirements of different battery types.

[0014] Furthermore, the lithium-ion battery is a lithium iron phosphate battery, a lithium manganese oxide battery, a lithium cobalt oxide battery or a ternary material battery.

[0015] Furthermore, the sodium ion battery is a polyanion material battery, a Prussian blue material battery or a layered oxide material battery.

[0016] Furthermore, the battery cell is a soft-pack square battery cell or an aluminum-shell square battery, and the shell is a plastic shell.

[0017] The utility model provides a high-reliability energy storage secondary battery module, which has the following beneficial effects:

[0018] First, high reliability. In the present invention, the battery module cell poles are laser welded or screwed, and the elastic bridge pieces added to the connection between the cells serve as soft connections. When the battery module is charged or discharged, the internal cells expand and bulge due to heat. However, the distance between the cell poles remains unchanged due to the soft connection, and the laser welds or screws are not affected.

[0019] Second, the assembly is convenient. The elastic bridge piece used for module connection is a soft connection device. The soft part uses the elasticity of the soft connection expansion joint to play a protective role, and there is no restriction on the angle of assembly.

[0020] Third, the fixing effect is good. The position and number of the elastic bridge pieces can be flexibly set according to the type, thickness, weight or complexity of the series and parallel connection of the battery cell. For example, one or more pieces can be set to limit and fix the battery cell at different positions for protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1-2 This is a structural diagram of a high-reliability energy storage secondary battery module of the utility model;

[0022] The reference numerals in the drawings include: 100, housing; 200, battery cell; 300, elastic bridge piece; 301, indented positioning portion; 302, elastic bridge portion; 400, positive electrode connecting piece; 500, negative electrode connecting piece. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below with reference to the embodiments.

[0024] like Figures 1-2 As shown, the utility model discloses a high-reliability energy storage secondary battery module, including a shell 100, which includes a plurality of battery cells 200 connected in series and parallel. The battery cells 200 adjacent to each other are flexibly connected and fixed to the inner wall of the shell 100 through elastic bridge pieces 300. The elastic bridge piece 300 includes an inner concave positioning portion 301 and elastic bridge portions 302 on both sides. The outer side of the elastic bridge portion 302 is in contact with the surface of the battery cell 200.

[0025] like Figure 1-2 As shown, to ensure reliable securement, the width of the recessed positioning portion 301 matches the gap between two adjacent battery cells 200, and a positioning hole is provided within the recessed positioning portion 301. Elastic bridges 302 are arranged at right angles on either side of the recessed positioning portion 301, with the height of the right-angle bend matching the thickness of the battery cell 200. The elastic bridges are made of copper or aluminum.

[0026] like Figure 1-2 As shown, in order to fully utilize the space and improve reliability, adjacent elastic bridge pieces 300 are staggered and arranged relative to each other at the upper and lower parts of the battery cell 200 .

[0027] like Figure 1-2 As shown, to meet normal usage requirements, the secondary battery pack also includes a positive electrode and a negative electrode. The positive electrode is electrically connected to the positive electrode column outside the shell 100 through the positive electrode connecting piece 400, and the negative electrode is electrically connected to the negative electrode column outside the shell 100 through the negative electrode connecting piece 500.

[0028] In terms of applicability, the present invention meets the needs of different battery cell types. The secondary battery can be a sodium-ion battery or a lithium-ion battery. Specifically, the lithium-ion battery can be a lithium iron phosphate battery, a lithium manganese oxide battery, a lithium cobalt oxide battery, or a ternary material battery; the sodium-ion battery can be a polyanion battery, a Prussian blue battery, or a layered oxide battery.

[0029] In terms of the shape of the battery cell, the present invention focuses on applying to square battery cells, which are soft-pack square battery cells or aluminum-shell square batteries. The shell is a plastic shell, which has good insulation protection and is convenient for injection molding.

[0030] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] The above embodiments are merely specific embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art will be able to make various modifications and improvements without departing from the scope of the present invention, and these obvious alternatives are all within the scope of protection of the present invention.

Claims

1. A high-reliability energy storage secondary battery module, comprising a housing containing a plurality of battery cells connected in series and parallel, characterized in that: The adjacent battery cells are flexibly connected and fixed on the inner wall of the shell through elastic bridge pieces. The elastic bridge pieces include a concave positioning portion and elastic bridge portions on both sides. The outer side of the elastic bridge portion is attached to the surface of the battery cell. A positioning hole is provided inside the concave positioning portion. The elastic bridge portion is arranged at right angles on both sides of the concave positioning portion. The height of the right-angle bend position is consistent with the thickness of the battery cell.

2. The high-reliability energy storage secondary battery module according to claim 1, characterized in that: The width of the concave positioning portion is consistent with the gap between two adjacent battery cells.

3. The high-reliability energy storage secondary battery module according to claim 2, characterized in that: The elastic bridging piece is a copper sheet or an aluminum sheet.

4. The high-reliability energy storage secondary battery module according to claim 3, characterized in that: Adjacent elastic bridge pieces are staggered and arranged relative to each other to separate the upper and lower parts of the battery cell.

5. The high-reliability energy storage secondary battery module according to claim 4, characterized in that: The secondary battery pack further comprises a positive electrode and a negative electrode. The positive electrode is electrically connected to the positive electrode post outside the shell through a positive electrode connecting piece, and the negative electrode is electrically connected to the negative electrode post outside the shell through a negative electrode connecting piece.

6. The high-reliability energy storage secondary battery module according to claim 5, characterized in that: The secondary battery is a sodium ion battery or a lithium ion battery.

7. The high-reliability energy storage secondary battery module according to claim 6, characterized in that: The lithium-ion battery is a lithium iron phosphate battery, a lithium manganese oxide battery, a lithium cobalt oxide battery or a ternary material battery.

8. The high-reliability energy storage secondary battery module according to claim 7, characterized in that: The sodium ion battery is a polyanion material battery, a Prussian blue material battery or a layered oxide material battery.

9. The high-reliability energy storage secondary battery module according to claim 7 or 8, characterized in that: The battery cell is a soft-pack square battery cell or an aluminum-shell square battery, and the shell is a plastic shell.

Images