Composite cold belt and battery pack

Abstract

The utility model relates to a composite cold belt and a battery pack, and belongs to the field of new energy equipment. The composite cold belt comprises a metal harmonica-shaped tube and a non-metal current collector; and two ends of the metal harmonica-shaped tube are hermetically connected with the non-metal current collector to form a cold zone for fluid to flow. According to the composite cold belt provided by the utility model, the non-metal current collector made of a metal material is replaced by a non-metal material, so that the preparation and processing cost is saved. Compared with a metal material processing technology, the processing technology of the non-metallic material is changed, and the non-metallic material can be subjected to an injection molding technology and the like, so that large-scale mass production of the cold belt is facilitated.

Description

Technical Field

[0001] This utility model relates to a composite cooling belt and battery pack, belonging to the field of new energy equipment. Background Technology

[0002] In recent years, the market penetration rate of new energy vehicles has continued to reach new highs, but issues such as range and charging remain important factors influencing users' choice of new energy vehicles. Increasing charging power to shorten charging time is one way to address range anxiety, but this also leads to increased battery heat generation. Therefore, the demand for liquid cooling in battery thermal management systems is increasing.

[0003] Harmonica tube-type cooling strips can be used to cool both cylindrical and prismatic battery cells, and their applications are quite widespread. In existing technology, the cooling strip is processed from metal materials, typically aluminum. The cooling strip consists of a harmonica tube and a current collector. During the harmonica tube processing, the tube is extruded from an aluminum block; however, the current collector often requires machining, which is not conducive to mass production.

[0004] Furthermore, the cold-rolled tape used in the processing of the harmonica tube and current collector assembly is made of metal, and the entire tape needs to be coated with insulating varnish to ensure insulation performance. It also exhibits significant heat diffusion to the outside environment. In summary, the existing technology suffers from several problems: the use of metal for the entire cold-rolled tape results in complex processing, high cost, heavy weight, and limited performance. Utility Model Content

[0005] This invention provides a composite cold strip, the structure of which is made of non-metallic materials, to solve problems such as processing, weight, and performance limitations.

[0006] The present invention adopts the following technical solution:

[0007] This invention employs a composite cooling strip comprising a metal harmonica tube and a non-metallic manifold; both ends of the metal harmonica tube are sealed to the non-metallic manifold to form a cooling strip for fluid flow. This composite cooling strip is a single-strand cooling strip, reducing its overall weight. The addition of non-metallic material reduces unnecessary heat exchange between the cooling strip and the external environment, minimizing heat loss and improving system performance.

[0008] The present invention employs a composite cooling strip, comprising a metal harmonica tube, a non-metallic current collector, and a non-metallic connector;

[0009] The fluid inlet or outlet ends of several metal harmonica tubes are interconnected via non-metallic connectors to form a fluid flow loop. Non-metallic collectors are provided at the fluid inlet or outlet ends of the metal harmonica tubes located at the beginning and end of the loop. This composite cooling strip structure is a multi-strand interconnected cooling strip configuration. This type of composite cooling strip further reduces heat loss and improves system performance while ensuring cost and weight control.

[0010] The composite cold band of this utility model, wherein the loop formed by the interconnection of several metal harmonica tubes and non-metallic connectors is in the form of a straight-line ring loop or a parallel S-shaped loop.

[0011] The battery pack of the composite cold strip of this utility model includes a composite cold strip, battery cells, a housing, and connecting pipes; the battery cells are arranged in a rectangular array in the housing, the composite cold strip is arranged between the battery cells arranged in a row, and the non-metallic current collectors at both ends of the composite cold strip are arranged on both sides of the battery cells, and the two adjacent non-metallic current collectors on both sides are connected by connecting pipes.

[0012] The composite cold-rolled battery pack of this utility model has a mounting base on the bottom side of the inner box, and a support base for the non-metallic current collector; the non-metallic current collector is connected to the mounting base through the support base.

[0013] The composite cold-rolled battery pack of this utility model is connected to the support base and the mounting base by adhesive or bolt connection.

[0014] The battery pack of the composite cold strip of this utility model includes a composite cold strip, battery cells, a housing, and a connecting pipe; the battery cells are arranged in a rectangular array, and S-shaped loop composite cold strips are interspersed within the rectangular array of battery cells; multiple sets of battery cells placed in the housing are each arranged with S-shaped loop composite cold strips, and the composite cold strips are sealed and connected by connecting pipes to form a cold strip for fluid flow.

[0015] The composite cooling strip of this utility model is made of nylon or nylon composite material. The non-metallic current collector is made by injection molding. The metal harmonica tube is connected and sealed to the non-metallic current collector by adhesive bonding or hot pressing.

[0016] Beneficial effects

[0017] The composite cold strip provided by this invention replaces the non-metallic current collector made of metal with a non-metallic material, saving on manufacturing and processing costs. Compared with the processing technology of metal materials, the processing technology of non-metallic materials is fundamentally different. Non-metallic materials can be processed using processes such as injection molding, which is conducive to the large-scale mass production of cold strips.

[0018] The composite cooling strip provided by this invention uses non-metallic materials, eliminating the need for insulating varnish spraying, thus reducing the spraying area and lowering processing costs. The use of a non-metallic current collector reduces unnecessary heat exchange between the cooling strip and the external environment, minimizing heat loss and improving system performance.

[0019] The battery pack using this novel composite cooling strip uses non-metallic materials for both the current collector and the connecting pipe. This eliminates the need for insulating varnish on the current collector and connecting pipe, reducing the coating area and lowering processing costs. Because both the current collector and connecting pipe are made of non-metallic materials, unnecessary heat exchange between the cooling strip and the external environment is reduced, minimizing heat loss and improving system performance.

[0020] Secondly, the non-metallic current collector has a structural support base, which can be connected to the housing mounting base, thus strengthening the overall strength of the system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the composite cooling belt of this utility model;

[0022] Figure 2 This is a schematic diagram of the composite cold-belt interconnection form of this utility model;

[0023] Figure 3 This utility model adopts Figure 1 Schematic diagram of a battery pack with a medium-composite cooling zone;

[0024] Figure 4 This utility model adopts Figure 3 Enlarged schematic diagram of the mid-section structure and local structures;

[0025] Figure 5 This utility model adopts Figure 2 A schematic diagram of a battery pack with a medium-composite cold zone. Detailed Implementation

[0026] To make the objectives and technical solutions of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1The diagram shows a composite cooling strip, comprising a metal harmonica tube 11 and a non-metallic manifold 12. Both ends of the metal harmonica tube 11 are sealed to the non-metallic manifold 12 to form a cooling strip for fluid flow. The metal harmonica tube 11 is manufactured using conventional extrusion methods, and the non-metallic manifold 12 can be made of plastic, such as nylon or nylon composite material. The non-metallic manifold 12 can be manufactured using injection molding. The metal harmonica tube 11 and the non-metallic manifold 12 are connected and sealed to form a manifold chamber, which communicates with the metal harmonica tube 11 to form a loop for fluid flow. The connection and sealing method can be adhesive bonding, hot pressing, or other forms.

[0028] like Figure 2 As shown: The composite cold strip includes a metal harmonica tube 11, a non-metallic current collector 12, and a non-metallic connector 13;

[0029] The fluid inlet or outlet ends of several metal harmonica tubes 11 are interconnected via non-metallic connectors 13 to form a fluid flow loop. Non-metallic manifolds 12 are respectively provided at the fluid inlet or outlet ends of the metal harmonica tubes 11 at the beginning and end of the loop. The metal harmonica tubes 11 and non-metallic manifolds 12 are connected and sealed to form a flow collection chamber, which is connected to the metal harmonica tubes 11 to form a fluid flow loop. Simultaneously, the metal harmonica tubes 11 are connected and sealed to the non-metallic connectors 13, connecting two metal harmonica tubes 11 to form a flow loop. The connection and sealing method can be adhesive bonding, hot pressing, or other forms.

[0030] The loop formed by interconnecting several metal harmonica tubes 11 with non-metallic connectors 13 can be either a straight-line loop or a parallel S-shaped loop.

[0031] The metal harmonica tube 11 is manufactured using a conventional extrusion method. The non-metallic current collector 12 and the non-metallic connector 13 can be made of plastic, such as nylon or nylon composite material. The non-metallic current collector 12 and the non-metallic connector 13 can be manufactured using injection molding.

[0032] like Figure 3 The diagram illustrates a battery pack structure employing a composite cooling strip, comprising a composite cooling strip 1, battery cells 2, a housing 3, and connecting pipes 4. The battery cells 2 are arranged in a rectangular array within the housing 3. The composite cooling strip 1 is positioned between the arranged battery cells 2. Non-metallic current collectors 12 at both ends of the composite cooling strip 1 are located on either side of the battery cells 2, and adjacent non-metallic current collectors 12 on either side are connected via connecting pipes 4. The current collectors 12 of the composite cooling strip 1 are made of non-metallic material. Therefore, the surface of the current collectors 12 does not require coating with insulating varnish. Furthermore, since both the current collectors 12 and the connecting pipes 4 are non-metallic materials, heat exchange between the liquid cooling system and non-essential components such as the housing 3 is minimal, resulting in less heat loss and improved overall thermal performance of the pack.

[0033] like Figure 4 As shown: The battery pack housing 3 of the composite cooling system has a mounting base 31 on the inner bottom side, and a support base 121 for the non-metallic current collector 12. The non-metallic current collector 12 is connected to the mounting base 31 through the support base 121, which strengthens the overall system strength. This connection can be adhesive or bolted. Since both the current collector 12 and the connecting pipe 4 are made of non-metallic materials, the heat exchange between the liquid cooling system and non-essential components such as the housing 3 is minimal, resulting in less heat loss and improving the overall thermal performance of the pack.

[0034] like Figure 5 As shown: The battery of the composite cold strip includes a composite cold strip 1, a cell 2, a housing 3, and a connecting tube 4; the cells 2 are arranged in a rectangular array, and the composite cold strip 1 with an S-shaped loop is interspersed inside the cells 2 arranged in a rectangular array.

[0035] The multiple sets of battery cells 2 placed in the housing 3 are all arranged with S-shaped circuit composite cold strips 1. The composite cold strips 1 are connected by connecting pipes 4 to form a sealed connection to form a cold strip for fluid flow.

[0036] The current collector 12 and connector 13 of the composite cooling strip 1 are made of non-metallic materials. Since the current collector 12, connector 13 and connecting pipe 4 are all made of non-metallic materials, the heat exchange between the liquid cooling system and non-essential components such as the housing 3 is small, resulting in less heat loss, which is beneficial to improving the overall thermal performance of the package.

[0037] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A composite cooling strip, characterized in that: Includes a metal harmonica tube (11) and a non-metallic manifold (12); both ends of the metal harmonica tube (11) are sealed to the non-metallic manifold (12) to form a cooling zone for fluid flow; the material of the non-metallic manifold (12) is nylon or nylon composite material; the metal harmonica tube (11) and the non-metallic manifold (12) are connected and sealed to form a manifold chamber, and one side end of each manifold chamber is connected to the metal harmonica tube (11) to form the cooling zone for fluid flow; an outlet is provided at the top and bottom of each manifold chamber.

2. The composite cold strip according to claim 1, characterized in that: The non-metallic current collector (12) is prepared by injection molding, and the metal harmonica tube (11) is connected and sealed to the non-metallic current collector (12) by adhesive bonding and hot pressing.

3. A composite cooling strip, characterized in that: Includes a metal harmonica tube (11), a non-metallic current collector (12), and a non-metallic connector (13). The fluid inlet or fluid outlet of several metal harmonica tubes (11) are interconnected by a non-metallic connector (13) to form a circuit for fluid flow. Non-metallic collectors (12) are provided at the fluid inflow end or fluid outflow end of the metal harmonica tube (11) located at the beginning and end of the loop.

4. The composite cold strip according to claim 2, characterized in that: The loop formed by the interconnection of several metal harmonica tubes (11) and non-metallic connectors (13) is as follows: the metal harmonica tubes (11) are arranged in a straight ring loop or the metal harmonica tubes (11) are arranged in parallel S-shaped loops.

5. The composite cold strip according to claim 3, characterized in that: The non-metallic current collector (12) is made of nylon or nylon composite material. The non-metallic current collector (12) is made by injection molding. The metal harmonica tube (11) and the non-metallic current collector (12) are connected and sealed by adhesive bonding and hot pressing.

6. A battery pack, comprising battery cells (2) and a housing (3), wherein the battery cells (2) are arranged in a rectangular array within the housing (3); characterized in that: It also includes a composite cold strip (1) and a connecting pipe (4), the structure of which is as described in claim 1; the composite cold strip (1) is arranged between the cells (2) arranged in rows, and the non-metallic current collectors (12) at both ends of the composite cold strip (1) are arranged on both sides of the cells (2), and the two adjacent non-metallic current collectors (12) on both sides are connected through the connecting pipe (4).

7. The battery pack according to claim 6, characterized in that: The box (3) has a mounting base (31) on the inner bottom side and a support base (121) for the non-metallic current collector (12); the non-metallic current collector (12) is connected to the mounting base (31) through the support base (121).

8. The battery pack according to claim 7, characterized in that: The support base (121) and the mounting base (31) are connected by adhesive or bolts.

9. A battery pack, comprising battery cells (2) and a housing (3), wherein the battery cells (2) are arranged in a rectangular array within the housing (3); characterized in that: It also includes a composite cold strip (1) and a connecting pipe (4). The structure of the composite cold strip (1) is as described in claim 2. The battery cells (2) are arranged in a rectangular array. The composite cold strip (1) with an S-shaped circuit is interspersed in the battery cells (2) arranged in a rectangular array. The multiple sets of battery cells (2) placed in the housing (3) are all arranged with composite cold strips (1) with an S-shaped circuit. The composite cold strips (1) are sealed and connected by the connecting pipe (4) to form a cold strip for fluid flow.

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