Battery module and new energy vehicle

Abstract

The application discloses a battery module and a new energy vehicle, and relates to the technical field of new energy. The battery module comprises a plurality of battery cells and a CCS assembly, the plurality of battery cells are arranged in sequence and are connected through the CCS assembly, the CCS assembly is located above the plurality of battery cells, and a heat insulation and flame retardant member is arranged between the plurality of battery cells and the CCS assembly. The battery module and the new energy vehicle can solve the problem that high temperature easily causes insulation failure between the battery cells and the CCS assembly, thereby reducing system safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a battery module and a new energy vehicle. BACKGROUND

[0002] At present, the top patch of the battery cell in the market is mostly a plastic sheet structure, which is closely matched with the battery cell blue film to realize full cladding of the battery cell aluminum shell, thereby ensuring the insulation performance of the battery cell monomer. A plurality of battery cells are arranged into a module, and a CCS (English full name: Cells Contact System, Chinese full name: integrated busbar) assembly is arranged above the battery cells. When the system is in thermal runaway, high temperature causes the battery cell top patch to melt and fail, which will cause insulation failure between the battery cell top cover and the CCS assembly, causing short circuit and arc to aggravate thermal runaway, and a large range of short circuit and arc may even cause the battery pack to catch fire, greatly reducing the system safety. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a battery module and a new energy vehicle, which can solve the problem of poor system safety caused by insulation failure between the battery cell and the CCS assembly due to high temperature in the prior art.

[0004] The embodiments of the present application are implemented as follows:

[0005] In a first aspect of the embodiments of the present application, a battery module is provided, which includes a plurality of battery cells and a CCS assembly. The plurality of battery cells are arranged in sequence and connected through the CCS assembly. The CCS assembly is located above the plurality of battery cells, and a heat insulation and flame retardant member is arranged between the plurality of battery cells and the CCS assembly. The battery module can solve the problem of poor system safety caused by insulation failure between the battery cell and the CCS assembly due to high temperature in the prior art.

[0006] As an implementable manner, each battery cell includes a battery cell shell, a battery cell body accommodated in the battery cell shell, and a battery cell top cover fixedly connected with the battery cell shell. The heat insulation and flame retardant member is bonded to the upper surface of the battery cell top cover.

[0007] As an implementable manner, a via hole is arranged on the heat insulation and flame retardant member, and the pole of the battery cell passes through the via hole and is connected with the CCS assembly.

[0008] As an implementable manner, each battery cell further includes an insulating cladding film, and the insulating cladding film is cladded to the outer surface of the battery cell shell.

[0009] As an implementable manner, the CCS assembly includes a plurality of connecting pads, and the poles of the plurality of battery cells are connected through the plurality of connecting pads.

[0010] As an implementable mode, the CCS assembly comprises a plurality of collection terminals, and poles of the plurality of battery cells are connected with a battery management system through the plurality of collection terminals, and the collection terminals are used to collect temperature signals and voltage signals of the battery cells.

[0011] As an implementable mode, at least one binding member is further included, and the binding member is arranged in a circumferential direction of the plurality of battery cells to form a whole module.

[0012] As an implementable mode, a battery box with a receiving cavity is further included, and the plurality of battery cells and the CCS assembly are accommodated in the receiving cavity.

[0013] As an implementable mode, the heat insulation and flame retardant member is made of mica.

[0014] In a second aspect, the application provides a new energy vehicle comprising the battery module. The battery module can solve the problem of poor system safety caused by insulation failure between the battery cells and the CCS assembly due to high temperature in the prior art.

[0015] The application has the following beneficial effects:

[0016] The battery module comprises a plurality of battery cells and a CCS assembly, the plurality of battery cells are arranged in sequence and connected through the CCS assembly, the CCS assembly is located above the plurality of battery cells, and a heat insulation and flame retardant member is arranged between the plurality of battery cells and the CCS assembly. The application uses the heat insulation and flame retardant effect of the heat insulation and flame retardant member. When the system is out of control, the insulation between the plurality of battery cells and the CCS assembly is stable and reliable due to the arrangement of the heat insulation and flame retardant member between the plurality of battery cells and the CCS assembly, so that the short circuit and arc discharge caused by the heat insulation and flame retardant member are avoided, and the safety of the system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0018] Figure 1 One of the structural schematic diagrams of the battery module provided by the application;

[0019] Figure 2 The second structural schematic diagram of the battery module provided by the application;

[0020] Figure 3 The Figure 2 The local enlarged view of A in FIG. 4;

[0021] Figure 4 Structure diagram three of battery module provided by the embodiment of the application.

[0022] Icon: 100-battery module; 10-battery cell; 11-battery cell top cover; 12-insulation coating film; 20-CCS assembly; 21-connection gasket; 22-acquisition terminal; 30-heat insulation and flame retardant; 31-via hole; 40-binding member; 50-battery box; 51-lower box; 52-upper cover. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme of the embodiments of the application will be described clearly and completely below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, rather than all the embodiments. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without creative labor based on the embodiments in the application belong to the scope of protection of the application.

[0025] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or suspended, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Please refer to Figures 1 to 4 , the embodiment of the present application provides a battery module 100, comprising a plurality of battery cells 10 and a CCS assembly 20, a plurality of battery cells 10 are arranged in sequence and connected through the CCS assembly 20, the CCS assembly 20 is located above the plurality of battery cells 10, and a heat insulation and flame retardant member 30 is arranged between the plurality of battery cells 10 and the CCS assembly 20. The battery module 100 can solve the problem of poor system safety caused by insulation failure between the battery cells 10 and the CCS assembly 20 due to high temperature in the prior art.

[0030] It should be noted that, as Figure 1 and Figure 2 shown, the battery module 100 includes a plurality of battery cells 10 and a CCS assembly 20, a plurality of battery cells 10 are arranged in sequence, for example, in this embodiment, a plurality of battery cells 10 are arranged in array form in sequence, and a plurality of battery cells 10 are connected through a CCS assembly 20, so that a plurality of battery cells 10 and a CCS assembly 20 form a high-voltage passage together, thereby realizing voltage accumulation. In the actual assembly process, battery cells 10 can be selected, both of which are located on the same side of the battery cell 10 (i.e. positive and negative poles), and all battery cells 10 can be placed with their poles facing upwards, and then the CCS assembly 20 is arranged directly above the plurality of battery cells 10, so as to facilitate the welding connection of the poles of the battery cells 10 and the CCS assembly 20.

[0031] On this basis, in order to solve the problem that high temperature in the prior art easily causes insulation failure between the battery cells 10 and the CCS assembly 20, thereby causing heat runaway to intensify or even fire, and further causing poor system safety, as Figure 1 , Figure 3 and Figure 4 shown, the battery module 100 further comprises a heat insulation and flame retardant member 30, and the heat insulation and flame retardant member 30 is arranged between the plurality of battery cells 10 and the CCS assembly 20, so as to utilize the heat insulation and flame retardation effect of the heat insulation and flame retardant member 30. When the system is in heat runaway, because the heat insulation and flame retardant member 30 is arranged between the plurality of battery cells 10 and the CCS assembly 20, the insulation between the plurality of battery cells 10 and the CCS assembly 20 is stable and reliable, thereby avoiding the phenomenon of heat runaway intensification or even fire caused by short circuit and arc, and further improving the safety of the system.

[0032] Therefore, in the actual assembly process, the battery cell 10 can be selected, both of whose pole posts (i.e., the positive pole post and the negative pole post) are located on the same side of the battery cell 10, and all the battery cells 10 can be placed with their pole posts facing upwards, and then the thermal insulation and flame retardant member 30 is arranged directly above the plurality of battery cells 10, and then the CCS assembly 20 is arranged directly above the thermal insulation and flame retardant member 30, so as to form an assembly mode in which the thermal insulation and flame retardant member 30 is arranged between the plurality of battery cells 10 and the CCS assembly 20. The number of the thermal insulation and flame retardant member 30 can be multiple, and the plurality of thermal insulation and flame retardant members 30 correspond to the plurality of battery cells 10 one by one, or the number of the thermal insulation and flame retardant member 30 can also be one, and one thermal insulation and flame retardant member 30 can cover all the battery cells 10, so as to ensure the insulation of the battery cells 10 and the CCS assembly 20.

[0033] As to the material of the thermal insulation and flame retardant member 30, those skilled in the art can reasonably select and design according to the actual situation, as long as the thermal insulation and flame retardant member 30 has the functions of thermal insulation and flame retardation, which is not specifically limited here. As an implementable manner, the material of the thermal insulation and flame retardant member 30 is mica. In addition, it should be understood that the shape and size of the thermal insulation and flame retardant member 30 can be designed according to the shape and size of the battery cell 10 or the CCS assembly 20, as long as the thermal insulation and flame retardant member 30 can play an insulation role between the plurality of battery cells 10 and the CCS assembly 20, which is not specifically limited here. For example, in the present embodiment, the shape of the battery cell 10 is square, and the shape of the thermal insulation and flame retardant member 30 matches the shape of the battery cell 10.

[0034] As an implementable manner, as shown in Figure 4 each battery cell 10 includes a battery cell shell, a battery cell body accommodated in the battery cell shell, and a battery cell top cover 11 fixedly connected with the battery cell shell, and the thermal insulation and flame retardant member 30 is adhered to the upper surface of the battery cell top cover 11.

[0035] It should be noted that, as shown in Figure 4 each battery cell 10 includes a battery cell shell, a battery cell body, and a battery cell top cover 11, and in the actual assembly process, the battery cell body can be placed in the battery cell shell first, and then the battery cell top cover 11 is covered on the battery cell shell. Through the mutual cooperation of the battery cell top cover 11 and the battery cell shell, the purpose of sealing the battery cell body can be achieved, thereby playing an insulation and protection role on the battery cell body. On this basis, considering that the CCS assembly 20 is located above the battery cell 10, the thermal insulation and flame retardant member 30 can be fixedly adhered to the upper surface of the battery cell top cover 11 (i.e., the side where the pole post of the battery cell 10 is located). After the CCS assembly 20 is arranged above the thermal insulation and flame retardant member 30, the thermal insulation and flame retardant member 30 can play an insulation and protection role.

[0036] As an implementable manner, as shown in Figure 4 The thermal insulation and flame retardant member 30 is provided with a through hole 31, and the pole of the battery cell 10 passes through the through hole 31 to be connected with the CCS assembly 20, so as to ensure that the pole of the battery cell 10 can be smoothly connected with the CCS assembly 20. In addition, the battery cell 10 is usually provided with a pressure relief valve and the like on the side where the pole is located, and similarly, the thermal insulation and flame retardant member 30 also needs to be provided with a through hole corresponding to the pressure relief valve, so as to ensure that the battery cell 10 can normally release pressure.

[0037] As an implementable manner, as shown in Figure 4 Each battery cell 10 further includes an insulating coating film 12, which is attached to the outer surface of the battery cell shell to play an insulating protection role on the battery cell shell through the insulating coating film 12. Therefore, through the close cooperation of the insulating coating film 12 and the thermal insulation and flame retardant member 30, the insulating protection role on the battery cell 10 can be played from each side (or in each direction) of the battery cell 10.

[0038] As an implementable manner, as shown in Figures 1 to 3 The CCS assembly 20 includes a plurality of connecting washers 21, and the poles of the plurality of battery cells 10 are connected through the plurality of connecting washers 21 to form a high-voltage passage, so as to realize voltage accumulation. In this way, the CCS assembly 20 can serve as a current carrier to realize the high-voltage function of the system.

[0039] As an implementable manner, as shown in Figures 1 to 3 The CCS assembly 20 includes a plurality of collecting terminals 22, and the poles of the plurality of battery cells 10 are connected through the plurality of collecting terminals 22 to form a collecting passage with the battery management system. The collecting terminal 22 is used to collect the temperature signal and the voltage signal of the battery cell 10, so as to transmit the temperature information and the voltage information of the battery cell 10 to the battery management system, thereby facilitating the battery management system to control and monitor the working of the battery cell 10.

[0040] As an implementable manner, as shown in Figure 1 The battery module 100 further includes at least one binding member 40, which is arranged in a circumferential direction of the module as a whole to fix and assemble the plurality of battery cells 10 in the battery box 50, so as to realize the storage and release of electric energy of the module as a whole.

[0041] As an implementable manner, as shown in Figure 1As shown, the battery module 100 further includes a battery box 50 having a receiving cavity, and the plurality of battery cells 10 and the CCS assembly 20 are all accommodated in the receiving cavity. For example, in the present embodiment, the battery box 50 includes a lower box 51 and an upper cover 52 fixedly connected with the lower box 51, so as to realize the sealing protection of the whole system by cooperation of the lower box 51 and the upper cover 52. In addition, in order to improve the safety of the system, a cooling unit, such as a liquid cooling unit or an air cooling unit, can be arranged in the battery box 50, so as to cool the battery cells 10 by the cooling unit, thereby avoiding the heat generated by the battery cells 10 from gathering in the battery box 50.

[0042] In a second aspect, the present application provides a new energy vehicle, which includes the above-mentioned battery module 100. Since the structure and advantages of the battery module 100 have been described in detail in the foregoing embodiments, they will not be described here again.

[0043] The above only describes optional embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0044] In addition, it should be noted that each specific technical feature described in the foregoing specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

Claims

1. A battery module, characterized by, The battery module comprises a plurality of battery cells and a CCS assembly, the battery cells are arranged in sequence and connected through the CCS assembly, the CCS assembly is located above the battery cells, and a heat insulation and fire retardant member is arranged between the battery cells and the CCS assembly.

2. The battery module of claim 1, wherein, Each battery cell comprises a battery cell shell, a battery cell body accommodated in the battery cell shell, and a battery cell top cover fixedly connected with the battery cell shell, and the heat insulation and fire retardant member is bonded to the upper surface of the battery cell top cover.

3. The battery module of claim 2, wherein, The heat insulation and fire retardant member is provided with a through hole, and the pole of the battery cell passes through the through hole and is connected with the CCS assembly.

4. The battery module of claim 2, wherein, Each battery cell further comprises an insulating coating film, and the insulating coating film is attached to the outer surface of the battery cell shell.

5. The battery module of claim 1, wherein, The CCS assembly comprises a plurality of connecting pads, and the poles of the battery cells are connected through the connecting pads.

6. The battery module of claim 1, wherein, The CCS assembly comprises a plurality of collection terminals, the poles of the battery cells are connected with a battery management system through the collection terminals, and the collection terminals are used for collecting temperature signals and voltage signals of the battery cells.

7. The battery module of claim 1, wherein, At least one binding member is further included, and the binding member surrounds the battery cells to form a circumferential arrangement of the module as a whole.

8. The battery module of claim 1, wherein, A battery box body with an accommodating cavity is further included, and the battery cells and the CCS assembly are accommodated in the accommodating cavity.

9. The battery module according to any one of claims 1 to 8, characterized by The material of the heat insulation and fire retardant member is mica.

10. A new energy vehicle, characterized in that, The battery module comprises any one of claims 1-9. The battery module comprises any one of claims 1-9.

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