Battery assembly, battery module and vehicle

Abstract

The utility model relates to a battery assembly which comprises a soft package battery and a fixed frame, and the soft package battery comprises a top surface, a bottom surface, two first side surfaces and two second side surfaces; the fixing frame comprises a first side wall part, a second side wall part, a third side wall part, a fourth side wall part, a fifth side wall part and a sixth side wall part, the first side wall part and the fourth side wall part are connected to the two second side faces respectively, the second side wall part and the fifth side wall part are connected to one of the two first side faces, and the sixth side wall part is connected to the other of the two second side faces. The third side wall part and the sixth side wall part are connected to the other first side surface of the two first side surfaces; and the second side wall part and the fifth side wall part as well as the third side wall part and the sixth side wall part are arranged at intervals in the width direction of the soft package battery. The utility model further provides a battery module. The utility model further provides a vehicle. The safety performance of the soft package battery can be improved, and the performance and the service life of the soft package battery can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery assembly, a battery module and a vehicle. Background Art

[0002] Studies have shown that solid-state batteries expand more severely than liquid batteries during charge and discharge cycles, so most solid-state batteries adopt the structure of soft-pack batteries. Soft-pack batteries have the following technical problems: the soft-pack membrane of the soft-pack battery is difficult to provide sufficient pressure to the expansion inside the soft-pack battery, and it is difficult to suppress the expansion of the soft-pack battery. During the transportation of soft-pack batteries, soft-pack batteries will inevitably be collided and squeezed, and the soft-pack batteries are prone to damage. If damaged soft-pack batteries are loaded on vehicles, there are serious safety hazards. Utility Model Content

[0003] The purpose of the present utility model is to provide a battery assembly, a battery module and a vehicle to alleviate or eliminate at least one of the above-mentioned technical problems.

[0004] A battery assembly according to the utility model comprises a soft-pack battery and a fixing frame, wherein the soft-pack battery comprises a top surface, a bottom surface, two first side surfaces and two second side surfaces, wherein the two first side surfaces are arranged opposite to each other along the thickness direction of the soft-pack battery, the two second side surfaces are arranged opposite to each other along the width direction of the soft-pack battery, the top surface and the bottom surface are arranged opposite to each other along the height direction of the soft-pack battery, and the pole ear of the soft-pack battery is arranged on the top surface;

[0005] The fixing frame includes a first frame portion and a second frame portion which are arranged opposite to each other along the width direction of the soft pack battery, the first frame portion includes a first side wall portion, a second side wall portion and a third side wall portion which are connected together, the second frame portion includes a fourth side wall portion, a fifth side wall portion and a sixth side wall portion which are connected together, the first side wall portion and the fourth side wall portion are respectively connected to two second side surfaces, the second side wall portion and the fifth side wall portion are connected to one of the two first side surfaces, and the third side wall portion and the sixth side wall portion are connected to the other of the two first side surfaces;

[0006] The second side wall portion and the fifth side wall portion are spaced apart from each other in the width direction of the soft pack battery to form a first opening between the second side wall portion and the fifth side wall portion;

[0007] The third side wall portion and the sixth side wall portion are spaced apart from each other in a width direction of the soft pack battery to form a second opening between the third side wall portion and the sixth side wall portion.

[0008] Optionally, a side of the fixed frame close to the top surface is open.

[0009] Optionally, the first opening and the second opening are both connected to the opening on one side close to the top surface.

[0010] Optionally, the first frame portion further includes a first bottom wall portion connected to the bottom surface, and the second frame portion further includes a second bottom wall portion connected to the bottom surface.

[0011] Optionally, the fixed frame also includes a third bottom wall portion connected between the first bottom wall portion and the second bottom wall portion, and / or the fixed frame also includes a seventh side wall portion connected between the second side wall portion and the fifth side wall portion, and / or the fixed frame also includes an eighth side wall portion connected between the third side wall portion and the sixth side wall portion.

[0012] Optionally, the fixed frame is composed of a first frame unit and a second frame unit, the first frame unit and the second frame unit are separate parts independent of each other, the first frame unit includes the first frame part, and the second frame unit includes the second frame part.

[0013] Optionally, the fixing frame is provided with weight-reducing notches and / or weight-reducing holes.

[0014] Optionally, the soft-pack battery and the fixed frame are connected by thermally conductive adhesive.

[0015] The utility model also proposes a battery module, comprising a plurality of battery assemblies as described above, wherein the plurality of battery assemblies are arranged in sequence along the thickness direction of the soft-pack battery, a buffer pad is arranged between two adjacent soft-pack batteries, and the first opening and the second opening between two adjacent battery assemblies provide installation space for the buffer pad.

[0016] The utility model also provides a vehicle, comprising any one of the battery assemblies described above.

[0017] The utility model has the following characteristics: the fixed frame is used to strengthen the protection of the soft-pack battery, which can reduce the possibility of damage to the soft-pack battery during transportation, thereby improving the safety performance of the soft-pack battery. The fixed frame can apply a certain pre-tightening force to the soft pack, which can suppress the expansion of the soft-pack battery and help ensure the performance and service life of the soft-pack battery. The first opening and the second opening are provided on the fixed frame, which is conducive to reducing the weight of the fixed frame and can also provide installation space for the buffer pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of a battery assembly described in some embodiments;

[0019] Figure 2is a front view of a battery assembly described in some embodiments;

[0020] Figure 3 for Figure 2 AA section view in;

[0021] Figure 4 for Figure 2 BB section view in;

[0022] Figure 5 for Figure 2 CC section view in;

[0023] Figure 6 It is a structural schematic diagram of the fixed frame described in some embodiments;

[0024] Figure 7 It is a structural schematic diagram of the fixed frame described in some embodiments;

[0025] Figure 8 It is a structural schematic diagram of the fixed frame described in some embodiments;

[0026] Fig. 9 It is a structural schematic diagram of the fixed frame described in some embodiments;

[0027] Fig.10 is a schematic diagram of the structure of a battery module described in some embodiments;

[0028] Fig.11 Schematic diagram of the structure of the battery module described in some embodiments.

[0029] Among them, 1-soft pack battery; 2-fixed frame; 3-first water cooling plate; 4-second water cooling plate; 5-buffer pad;

[0030] 11-soft coating; 12-ear;

[0031] 21-first frame unit; 22-second frame unit; 23-third bottom wall portion; 24-weight reduction notch; 25-seventh side wall portion; 26-eighth side wall portion; 27-weight reduction hole; 28-first opening; 29-second opening;

[0032] 211 - first side wall portion; 212 - second side wall portion; 213 - third side wall portion; 214 - first bottom wall portion;

[0033] 221 - fourth side wall portion; 222 - fifth side wall portion; 223 - sixth side wall portion; 224 - second bottom wall portion. DETAILED DESCRIPTION

[0034] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0036] like Figure 1 A battery assembly shown in the figure includes a soft-pack battery 1 and a fixed frame 2, the soft-pack battery 1 includes a top surface, a bottom surface, two first side surfaces and two second side surfaces, the two first side surfaces are arranged oppositely along the thickness direction of the soft-pack battery 1, the two second side surfaces are arranged oppositely along the width direction of the soft-pack battery 1, the top surface and the bottom surface are arranged oppositely along the height direction of the soft-pack battery 1, and the pole ear 12 of the soft-pack battery 1 is arranged on the top surface; the fixed frame 2 includes a first frame portion and a second frame portion arranged oppositely along the width direction of the soft-pack battery 1, the first frame portion includes a first side wall portion 211, a second side wall portion 212 and a third side wall portion 213 connected together, and the second frame portion includes a fourth side wall portion 221, a fifth side wall portion 222 and a sixth side wall portion connected together. The side wall portion 223, the first side wall portion 211 and the fourth side wall portion 221 are connected to the two second side surfaces respectively, the second side wall portion 212 and the fifth side wall portion 222 are connected to one of the two first side surfaces, and the third side wall portion 213 and the sixth side wall portion 223 are connected to the other of the two first side surfaces; the second side wall portion 212 and the fifth side wall portion 222 are arranged at intervals from each other in the width direction of the soft pack battery 1 to form a first opening 28 between the second side wall portion 212 and the fifth side wall portion 222; the third side wall portion 213 and the sixth side wall portion 223 are arranged at intervals from each other in the width direction of the soft pack battery 1 to form a second opening 29 between the third side wall portion 213 and the sixth side wall portion 223. The thickness direction, height direction and width direction of the soft pack battery 1 are perpendicular to each other.

[0037] In the above technical solution, the fixed frame 2 is used to strengthen the protection of the soft-pack battery 1, which can reduce the possibility of damage to the soft-pack battery 1 during transportation, thereby improving the safety performance of the soft-pack battery 1. The fixed frame 2 can apply a certain pre-tightening force to the soft pack, which can suppress the expansion of the soft-pack battery 1, and help to ensure the performance and service life of the soft-pack battery 1. The first opening 28 and the second opening 29 are set on the fixed frame 2, which is conducive to reducing the weight of the fixed frame 2, and can also provide installation space for the buffer pad 5, which provides convenience for integrating multiple battery assemblies into a battery module. The first opening 28 and the second opening 29 are arranged corresponding to the large surface of the soft-pack battery 1, which can provide space for the expansion of the soft-pack battery 1 and help to ensure the normal operation of the soft-pack battery 1.

[0038] In some embodiments, Figure 1 As shown, one side of the fixing frame 2 close to the top surface is open. The top side of the fixing frame 2 is set to be open, and the soft-pack battery 1 can be conveniently assembled into the fixing frame 2 through the opening.

[0039] In some embodiments, Figures 1 to 3 As shown, the first opening 28 and the second opening 29 are both connected to the opening on the top surface, that is, the first opening 28 is connected to the opening on the top surface to form a first inlet, and the second opening 29 is connected to the opening on the top surface to form a second inlet. The cushion 5 can be assembled into the first opening 28 and the second opening 29 through the first inlet and the second inlet.

[0040] In some embodiments, Figures 1 to 5 As shown, the first frame portion further includes a first bottom wall portion 214 connected to the bottom surface, and the second frame portion further includes a second bottom wall portion 224 connected to the bottom surface. The first bottom wall portion 214 and the second bottom wall portion 224 can enhance the protection of the bottom surface of the soft-pack battery 1. In a specific implementation, the first bottom wall portion 214, the first side wall portion 211, the second side wall portion 212 and the third side wall portion 213 are fixedly connected together, and the second bottom wall portion 224, the fourth side wall portion 221, the fifth side wall portion 222 and the sixth side wall portion 223 are fixedly connected together.

[0041] In some embodiments, Figures 1 to 5 As shown, the fixed frame 2 can adopt a split structure, and the fixed frame 2 is composed of a first frame unit 21 and a second frame unit 22. The first frame unit 21 and the second frame unit 22 are separate parts independent of each other. The first frame unit 21 includes a first frame part, and the second frame unit 22 includes a second frame part. The fixed frame 2 adopting a split structure has the characteristics of easy manufacturing and easy assembly.

[0042] In some embodiments, Figure 6As shown, the fixed frame 2 can adopt an integrated structure, and the fixed frame 2 also includes a third bottom wall portion 23 connected between the first bottom wall portion 214 and the second bottom wall portion 224. The first bottom wall portion 214, the second bottom wall portion 224 and the third bottom wall portion 23 constitute a frame bottom wall portion connected to the bottom surface of the soft-pack battery 1.

[0043] In some embodiments, Figures 7 to 9 As shown, the fixed frame 2 can adopt an integrated structure, and the fixed frame 2 also includes a third bottom wall portion 23 connected between the first bottom wall portion 214 and the second bottom wall portion 224, a seventh side wall portion 25 connected between the second side wall portion 212 and the fifth side wall portion 222, and an eighth side wall portion 26 connected between the third side wall portion 213 and the sixth side wall portion 223. The seventh side wall portion 25 and the eighth side wall portion 26 are provided to strengthen the structure at the bottom of the fixed frame 2.

[0044] In some embodiments, Figures 6 to 9 As shown, one or more weight-reducing notches 24 are provided on the side of the second side wall portion 212 close to the first opening 28, the side of the fifth side wall portion 222 close to the first opening 28, the side of the third side wall portion 213 close to the second opening 29, and the side of the sixth side wall portion 223 close to the second opening 29. The weight-reducing notches 24 can reduce the weight of the fixing frame 2, and can also provide a heat dissipation channel for the soft-pack battery 1, and the weight-reducing notches 24 are easy to process.

[0045] In some embodiments, Fig. 9 As shown, the fixing frame 2 is provided with a weight-reducing hole 27, which can reduce the weight of the fixing frame 2 and provide a heat dissipation channel for the soft-pack battery 1. In a specific implementation, the weight-reducing hole 27 can be provided on one or more of the first side wall portion 211, the fourth side wall portion 221 and the frame bottom wall portion.

[0046] In some embodiments, the soft-pack battery 1 and the fixed frame 2 are connected by thermally conductive adhesive, which is applied to the contact surface of the fixed frame 2 and the soft-pack battery 1. The fixed frame 2 can fix the soft-pack battery 1, and the heat generated by the soft-pack battery 1 can be quickly dissipated through the fixed frame 2. In specific implementation, each wall of the fixed frame 2 and the soft-pack mold of the soft-pack battery 1 can be connected by thermally conductive structural adhesive, and the soft-pack mold of the soft-pack battery 1 is usually an aluminum-plastic film.

[0047] In specific implementation, the fixed frame 2 can be an injection molded part or an extruded part. The sharp parts of the fixed frame 2 need to be rounded to prevent the sharp parts from piercing the aluminum-plastic film. The wall thickness of the fixed frame 2 is usually set between 0.3 mm and 3 mm.

[0048] When assembling the battery assembly, usually first apply thermal conductive structural adhesive on the inner side of the fixed frame 2, and then put the soft-pack battery 1 into the fixed frame 2, and use external force to make the fixed frame 2 and the soft-pack battery 1 tightly bonded. The fixed frame 2 can fix and support the soft-pack battery 1, preventing the soft-pack battery 1 from shaking up and down and causing abnormal noise during the driving of the vehicle. The fixed frame 2 also reduces the possibility of damage to the soft-pack battery 1 during transportation. The fixed frame 2 can also effectively suppress the expansion of the soft-pack battery 1 during the charge and discharge cycle of the soft-pack battery 1.

[0049] In some embodiments, Fig.10 and Fig.11 As shown, the present application also proposes a battery module, including a plurality of battery assemblies as described in any of the above items, wherein the plurality of battery assemblies are arranged in sequence along the thickness direction of the soft-pack battery 1, a buffer pad 5 is provided between two adjacent soft-pack batteries 1, and the first opening 28 and the second opening 29 between two adjacent battery assemblies provide installation space for the buffer pad 5. With the above technical solution, the first opening 28 and the second opening 29 between two adjacent battery assemblies provide expansion space for the soft-pack battery 1, and the buffer pad 5 has a certain compression force, which can suppress the expansion of the soft-pack battery 1 during the charge and discharge cycle. As a preferred example, the structure and size of the first opening 28 and the second opening 29 between two adjacent battery assemblies are consistent, and the position of the first opening 28 and the position of the second opening 29 between two adjacent battery assemblies are arranged correspondingly.

[0050] In some embodiments, Fig.10 and Fig.11 As shown, the battery module also includes a first water-cooling plate 3 and a second water-cooling plate 4 which are arranged opposite to each other along the width direction of the soft-pack battery 1, a plurality of battery assemblies are fixedly connected between the first water-cooling plate 3 and the second water-cooling plate 4, a first side wall portion 211 of a plurality of battery assemblies is connected to the first water-cooling plate 3, and a second side wall portion 212 of a plurality of battery assemblies is connected to the second water-cooling plate 4. Providing the first water-cooling plate 3 and the second water-cooling plate 4 can improve the heat dissipation capacity of the battery module.

[0051] In some embodiments, Fig.11 As shown, the battery frames of multiple battery assemblies can be made into an integrated part, thereby saving some space and helping to improve the mass energy density of the battery module.

[0052] In some embodiments, the present application also proposes a vehicle, comprising any of the battery assemblies described above.

[0053] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics of the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0054] In the description of the present invention, it should be understood that the directions indicated by the terms "width direction", "height direction", "thickness direction" and the like are based on the attached Figure 1 The orientations represented by the coordinate system are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

Claims

1. A battery assembly, characterized in that: The invention comprises a soft-pack battery (1) and a fixing frame (2), wherein the soft-pack battery (1) comprises a top surface, a bottom surface, two first side surfaces and two second side surfaces, the two first side surfaces are arranged opposite to each other along the thickness direction of the soft-pack battery (1), the two second side surfaces are arranged opposite to each other along the width direction of the soft-pack battery (1), the top surface and the bottom surface are arranged opposite to each other along the height direction of the soft-pack battery (1), and the pole ear (12) of the soft-pack battery (1) is arranged on the top surface; The fixing frame (2) comprises a first frame portion and a second frame portion which are arranged opposite to each other along the width direction of the soft-pack battery (1), the first frame portion comprising a first side wall portion (211), a second side wall portion (212) and a third side wall portion (213) which are connected together, the second frame portion comprising a fourth side wall portion (221), a fifth side wall portion (222) and a sixth side wall portion (223) which are connected together, the first side wall portion (211) and the fourth side wall portion (221) are respectively connected to two of the second side surfaces, the second side wall portion (212) and the fifth side wall portion (222) are connected to one of the two first side surfaces, and the third side wall portion (213) and the sixth side wall portion (223) are connected to the other of the two first side surfaces; The second side wall portion (212) and the fifth side wall portion (222) are arranged at intervals from each other in the width direction of the soft-pack battery (1), so as to form a first opening (28) between the second side wall portion (212) and the fifth side wall portion (222); The third side wall portion (213) and the sixth side wall portion (223) are arranged at intervals from each other in the width direction of the soft-pack battery (1) to form a second opening (29) between the third side wall portion (213) and the sixth side wall portion (223).

2. The battery assembly according to claim 1, characterized in that: The side of the fixed frame (2) close to the top surface is open.

3. The battery assembly according to claim 2, characterized in that: The first opening (28) and the second opening (29) are both connected to the opening on one side close to the top surface.

4. The battery assembly according to claim 1, characterized in that: The first frame portion further comprises a first bottom wall portion (214) connected to the bottom surface, and the second frame portion further comprises a second bottom wall portion (224) connected to the bottom surface.

5. The battery assembly according to claim 4, characterized in that: The fixed frame (2) further includes a third bottom wall portion (23) connected between the first bottom wall portion (214) and the second bottom wall portion (224), and / or the fixed frame (2) further includes a seventh side wall portion (25) connected between the second side wall portion (212) and the fifth side wall portion (222), and / or the fixed frame (2) further includes an eighth side wall portion (26) connected between the third side wall portion (213) and the sixth side wall portion (223).

6. The battery assembly according to claim 1, characterized in that: The fixed frame (2) is composed of a first frame unit (21) and a second frame unit (22); the first frame unit (21) and the second frame unit (22) are separate parts independent of each other; the first frame unit (21) includes the first frame portion, and the second frame unit (22) includes the second frame portion.

7. The battery assembly according to claim 1, characterized in that: The fixed frame (2) is provided with a weight-reducing notch (24) and / or a weight-reducing hole (27).

8. The battery assembly according to claim 1, characterized in that: The soft-pack battery (1) and the fixed frame (2) are connected by using a thermally conductive adhesive.

9. A battery module, characterized in that: Comprising a plurality of battery assemblies according to any one of claims 1 to 8, the plurality of battery assemblies are arranged in sequence along the thickness direction of the soft-pack battery (1), a buffer pad (5) is provided between two adjacent soft-pack batteries (1), and the first opening (28) and the second opening (29) between two adjacent battery assemblies provide installation space for the buffer pad (5).

10. A vehicle, characterized in that: A battery assembly comprising any one of claims 1 to 8.

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