Battery pack and electric automobile

Abstract

The utility model provides a battery pack and an electric vehicle, and relates to the technical field of energy storage. The battery pack provided by the utility model comprises a shell which is provided with a containing cavity, and the containing cavity is provided with an opening; the cover body is arranged on the opening in a covering manner; the battery cell module is arranged in the accommodating cavity, and the battery cell module comprises a plurality of battery cells which are arranged in sequence; the pressing and clamping piece is arranged between the battery cell module and the cover body, and the pressing and clamping piece is pressed and clamped on the plurality of battery cells and extends along the thickness direction of the battery cells. The battery pack provided by the utility model can be used as a partial structure of an automobile floor to bear the self weight of an automobile body and the external treading working condition, so that the performance and the safety of the battery pack are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack and an electric vehicle. Background Art

[0002] As the sole source of power for electric vehicles, the battery pack plays a crucial role. Therefore, optimizing the design of the battery pack structure is of great research significance. Integrating the battery pack into the vehicle body and connecting it directly to the seats significantly reduces the number of parts and improves assembly efficiency, placing increasing demands on the battery pack design. The battery pack acts as the vehicle floor and must withstand the rigors of the entire vehicle.

[0003] However, at present, ordinary battery packs only serve as a power source for electric vehicles and cannot withstand the weight of the entire vehicle and external pedaling pressure. Utility Model Content

[0004] The present application provides a battery pack and an electric vehicle, wherein the battery pack can serve as part of the structure of the vehicle floor, bearing the weight of the vehicle body and external trampling conditions, thereby improving the performance and safety of the battery pack.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A first aspect of the present application provides a battery pack, comprising: a housing having a receiving cavity, the receiving cavity having an opening;

[0007] a cover body, covering the opening;

[0008] A battery cell module is disposed in the accommodating cavity, wherein the battery cell module includes a plurality of battery cells arranged in sequence;

[0009] The pressing member is arranged between the battery core module and the cover body, and the pressing member is pressed on the multiple battery cores and extends along the thickness direction of the battery cores.

[0010] In a possible implementation, the pressing member has a connecting portion on the side facing the cover body, the cover body is provided with a connecting groove, the connecting groove is recessed toward the side away from the battery cell, and the pressing member is interference-connected to the connecting groove through the connecting portion.

[0011] In a possible implementation, the connecting portion of the pressing member is an elastic portion.

[0012] In a possible implementation, the pressing member includes a pressing plate, which is fixedly connected between the battery cell module and the cover body, and is provided with vertical ribs, which face the battery cell and extend along the length direction of the pressing plate;

[0013] It also includes multiple card plates. Along the width direction of the battery cells, two of the card plates are respectively connected to two adjacent groups of the battery cells to form a first interval. The pressure plate is clamped to the first interval through the vertical ribs. Each group of the battery cells includes at least two battery cells. The two battery cells are arranged in sequence along their own thickness direction, and each of the card plates is connected to the two battery cells.

[0014] In a possible implementation, the battery cell is provided with a pole, the pole is located on a side of the battery cell facing the opening, and the clamping plate is fixedly connected to the pole.

[0015] In a possible implementation, the pressing plate is further provided with a transverse rib, the transverse rib being orthogonal to the vertical rib, the transverse rib extending along the width direction of the pressing plate, and the transverse rib protruding toward one side of the battery cell;

[0016] Along the thickness direction of the battery cells, the two clamping plates are respectively connected to two adjacent groups of the battery cells, and a second gap is formed between the two clamping plates. The second gap is used to be clamped with the transverse ribs. Each group of the battery cells includes at least two battery cells.

[0017] In a possible implementation, the transverse ribs are provided in plurality, and the plurality of transverse ribs are arranged at intervals along the length direction of the pressing plate.

[0018] In a possible implementation, the plurality of transverse ribs are arranged at equal intervals, and a distance between two adjacent transverse ribs is less than or equal to the sum of thicknesses of the two battery cells.

[0019] In a possible implementation, an adhesive layer is provided on the first surface of the pressing plate for bonding with the clamping plate, and the first surface is the surface on the side where the vertical ribs are provided.

[0020] The battery pack provided in the first aspect of the present application has at least the following beneficial effects:

[0021] The battery pack has a clamping part that is arranged between the battery module and the cover and is pressed onto the multiple battery cells of the battery module. This structure can effectively support the cover, reduce the deformation of the cover when it is under pressure, and avoid the problem of the battery pack cover being damaged and failing due to being stepped on. In this way, the overall modality of the battery pack can be significantly improved, and the reliability and safety of the battery can be increased. Moreover, the battery pack provided in the embodiment of the present application can be used as a partial structure of the car floor and play some of the functions of the car floor, thereby reducing the amount of parts used in the whole vehicle, reducing the weight of the whole vehicle, and reducing the cost of the whole vehicle.

[0022] A second aspect of the present application provides an electric vehicle, comprising a vehicle body and a battery pack provided by any one of the above technical solutions, wherein the battery pack is arranged inside the vehicle body and is used to power the vehicle body.

[0023] The electric vehicle provided in the second aspect of this application has all the beneficial effects of the battery pack provided in the first aspect of this application, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the battery without the box cover installed;

[0027] Figure 3 An isometric view of a layering strip in a battery provided in an embodiment of the present application;

[0028] Figure 4 A bottom view of a pressure strip in a battery provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of stacked cells assembled without pressure strips in a battery provided in an embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of the structure of the battery provided in an embodiment of the present application after the intermediate layer is assembled on the stacked battery cells.

[0031] Description of reference numerals:

[0032] 100, housing; 200, cover; 300, battery module; 310, battery cell; 320, pole;

[0033] 400 , pressing member; 410 , connecting portion; 420 , pressing plate; 421 , vertical ribs; 422 , horizontal ribs; 423 , adhesive layer; 430 , first spacer; 440 , second spacer; 500 , card board.

[0034] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0035] As described in the background, the battery pack, as the sole source of power for electric vehicles, plays a vital role. Therefore, optimizing the design of the battery pack structure is of great research significance. Integrating the battery pack into the vehicle body and connecting it directly to the seats significantly reduces the number of parts and improves assembly efficiency, placing increasing demands on the battery pack design. The battery pack acts as the vehicle floor, requiring it to withstand the stresses of the entire vehicle.

[0036] However, at present, ordinary battery packs only serve as a power source for electric vehicles and cannot withstand the weight of the entire vehicle and external pedaling pressure.

[0037] In response to the above technical problems, the embodiments of the present application provide a battery pack and an electric vehicle. The battery pack and the electric vehicle can serve as part of the structure of the vehicle floor, bearing the weight of the vehicle body and external trampling conditions, thereby improving the performance and safety of the battery pack.

[0038] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] Combine Figures 1 to 6 The battery pack provided in the embodiment of the present application includes a shell 100 having a accommodating cavity with an opening; a cover body 200, which is arranged to cover the opening; a battery cell 310 module 300, which is arranged in the accommodating cavity, and the battery cell 310 module 300 includes a plurality of battery cells 310 arranged in sequence; a pressing member 400, which is arranged between the battery cell 310 module 300 and the cover body 200, and the pressing member 400 is pressed on the plurality of battery cells 310 and extends along the thickness direction of the battery cells 310.

[0040] In this way, the battery pack has a pressing part 400 that is arranged between the battery cell 310 module 300 and the cover body 200 and pressed on the multiple battery cells 310 of the battery cell 310 module 300. This structure can effectively support the cover body 200, reduce the deformation of the cover body 200 when it is under pressure, and avoid the problem of the battery pack cover body 200 being damaged and failing due to being stepped on. In this way, the overall modality of the battery pack can be significantly improved, and the reliability and safety of the battery can be increased. Not only that, the battery pack provided in the embodiment of the present application can be used as a partial structure of the car floor and play some functions of the car floor, thereby reducing the amount of parts used in the whole vehicle, reducing the weight of the whole vehicle, and reducing the cost of the whole vehicle.

[0041] For example, the cover 200 may be a CTV (Cell-to-Vehicle) box cover.

[0042] Further, if Figure 1 As shown, the battery cell 310 module 300 is a module structure in which a plurality of battery cells 310 are stacked and arranged in sequence according to a rule and accommodated in the accommodation cavity of the housing 100. Figure 6 It can be seen that the pressing member 400 extends along the Y direction.

[0043] In some embodiments, the pressing member 400 has a connecting portion 410 on the side facing the cover 200 , and the cover 200 is provided with a connecting groove, which is recessed toward the side away from the battery cell 310 , and the pressing member 400 is interference-connected to the connecting groove through the connecting portion 410 .

[0044] With this arrangement, the pressing member 400 is interference-connected to the cover body 200 , and the connection strength between the two is relatively high. Furthermore, the shape of the connection groove is adapted to the outer contour of the connection portion 410 , further enhancing the connection stability between the two.

[0045] In some embodiments, the connecting portion 410 of the pressing member 400 is an elastic portion. For example, the pressing member 400 includes a plastic body on which an elastic portion is provided. The elastic portion is made of elastic foam. In this way, the setting of the elastic portion can serve as a buffer layer between the pressing member 400 and the cover body 200, ensuring the connection stability between the pressing member 400 and the cover body 200 while improving the deformation resistance of the pressing member 400, so that when the cover body 200 is subjected to external force, the pressing member 400 can absorb more impact energy for the battery cell 310.

[0046] In some embodiments, the pressing member 400 includes a pressing plate 420, which is fixedly connected between the battery cell 310 module 300 and the cover body 200. Vertical ribs 421 are provided on the pressing plate 420, and the vertical ribs 421 face the battery cell 310. The vertical ribs 421 extend along the length direction of the pressing plate 420. For example, the vertical ribs 421 are arranged at the bottom of the pressing plate 420.

[0047] The battery pack also includes multiple card plates. Along the width direction of the battery cells 310, two card plates are respectively connected to two adjacent groups of battery cells 310 to form a first gap 430. The pressure plate 420 is clamped to the first gap 430 through vertical ribs 421. Each group of battery cells 310 includes at least two battery cells 310. The two battery cells 310 are arranged in sequence along their own thickness direction, and each card plate is connected to two battery cells 310.

[0048] In this way, the vertical ribs 421 on the pressing plate 420 cooperate with the clamping plate forming the first spacer 430 on the battery cell 310 , thereby improving the clamping stability of the pressing plate 420 on the battery cell 310 module 300 .

[0049] Based on the above embodiment, it can be improved that the two clamping plates are respectively located on one side of two adjacent battery cells 310 close to the opposite ends, so that the first spacer 430 is located between the two adjacent battery cells 310 .

[0050] In this way, through the arrangement of the vertical ribs 421 on the pressure plate 420, when the cover 200 and the pressure plate 420 are under pressure, the pressure can be transmitted to the end (shoulders) of the two adjacent battery cells 310 through the vertical ribs 421, thereby improving the overall structural strength of the battery pack and reducing the possibility of damage to the battery cells 310 due to pressure.

[0051] In some embodiments, a pole 320 is provided on the battery cell 310 . The pole 320 is located on a side of the battery cell 310 facing the opening, and the clamping plate is fixedly connected to the pole 320 .

[0052] In some embodiments, a transverse rib 422 is further provided on the pressing plate 420. The transverse rib 422 is located at the bottom of the pressing plate 420. The transverse rib 422 is orthogonal to the vertical rib 421. The transverse rib 422 extends along the width direction of the pressing plate 420. The transverse rib 422 protrudes toward one side of the battery cell 310. Along the thickness direction of the battery cell 310, two card plates are respectively connected to two adjacent groups of battery cells 310, and a second spacer 440 is formed between the two card plates. The second spacer 440 is used to be clamped with the transverse rib 422. Each group of battery cells 310 includes at least two battery cells 310.

[0053] In this way, by setting the horizontal ribs 422 on the pressure plate 420, and cooperating with the vertical ribs 421 to be clamped in the gap constructed by the clamping plate on the battery cell 310 module 300, the pressure clamping stability of the pressure plate 420 on the battery cell 310 module 300 is enhanced along the thickness and width directions of the battery cell 310.

[0054] Preferably, along the thickness direction of the battery cell 310, the pressure plate 420 extends to a position close to the edge of the battery cell 310 to form a second gap 440 between the two battery cells 310. In this way, after the transverse rib 422 is clamped in the second gap 440, when the pressure plate 420 is under pressure, the pressure is transmitted to the edge of the battery cell 310 and the position between the two adjacent battery cells 310, thereby reducing the probability of damage to the battery cell 310.

[0055] In some embodiments, a plurality of transverse ribs 422 are provided, and the plurality of transverse ribs 422 are spaced apart along the length direction of the pressure plate 420. In this way, the plurality of transverse ribs 422 are provided to cooperate with the plurality of second intervals 440 formed by the plurality of pressure plates 420 on the battery cell 310 module 300, thereby increasing the contact area between the pressure plate 420 and the battery cell 310 module 300 and enhancing the stability of the pressing card.

[0056] In some embodiments, the plurality of transverse ribs 422 are arranged at equal intervals, and the distance between two adjacent transverse ribs 422 is less than or equal to the sum of the thicknesses of the two battery cells 310 .

[0057] In some embodiments, the first surface of the pressure plate 420 is provided with an adhesive layer 423 for bonding with the card board. The first surface is the surface on the side where the vertical ribs 421 are provided. In this way, the connection stability between the pressure plate 420 and the card board is further enhanced, and the pressing performance of the pressing part 400 on the battery cell 310 module 300 is enhanced, thereby improving the pressure-bearing capacity of the battery pack.

[0058] In a second aspect, an embodiment of the present application provides an electric vehicle, comprising a vehicle body and a battery pack according to any embodiment of the first aspect, wherein the battery pack is disposed inside the vehicle body and is used to supply power to the vehicle body.

[0059] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application.

[0060] 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 defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0061] In this application, 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 or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0062] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0064] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: The housing has a receiving cavity, wherein the receiving cavity has an opening; a cover body, covering the opening; A battery cell module is disposed in the accommodating cavity, wherein the battery cell module includes a plurality of battery cells arranged in sequence; The pressing member is arranged between the battery core module and the cover body, and the pressing member is pressed on the multiple battery cores and extends along the thickness direction of the battery cores.

2. The battery pack according to claim 1, wherein: The pressing member has a connecting portion on a side facing the cover body, the cover body is provided with a connecting groove, the connecting groove is recessed toward a side away from the battery core, and the pressing member is interference-connected to the connecting groove through the connecting portion.

3. The battery pack according to claim 2, wherein: The connecting portion of the pressing member is an elastic portion.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The pressing member includes a pressing plate, which is fixedly connected between the battery module and the cover body, and is provided with vertical ribs, which face the battery cell and extend along the length direction of the pressing plate; It also includes multiple card plates. Along the width direction of the battery cells, two of the card plates are respectively connected to two adjacent groups of the battery cells to form a first interval. The pressure plate is clamped to the first interval through the vertical ribs. Each group of the battery cells includes at least two battery cells. The two battery cells are arranged in sequence along their own thickness direction, and each of the card plates is connected to the two battery cells.

5. The battery pack according to claim 4, characterized in that: The battery core is provided with a pole, the pole is located on a side of the battery core facing the opening, and the clamping plate is fixedly connected to the pole.

6. The battery pack according to claim 4, characterized in that: The pressing plate is further provided with a transverse rib, the transverse rib being orthogonal to the vertical rib, the transverse rib extending along the width direction of the pressing plate, and the transverse rib protruding toward one side of the battery cell; Along the thickness direction of the battery cells, the two clamping plates are respectively connected to two adjacent groups of the battery cells, and a second gap is formed between the two clamping plates. The second gap is used to be clamped with the transverse ribs. Each group of the battery cells includes at least two battery cells.

7. The battery pack according to claim 6, characterized in that: The transverse ribs are provided in plurality and are spaced apart along the length direction of the pressing plate.

8. The battery pack according to claim 7, characterized in that: The plurality of transverse ribs are arranged at equal intervals, and the distance between two adjacent transverse ribs is less than or equal to the sum of the thicknesses of the two battery cells.

9. The battery pack according to claim 4, characterized in that: The first surface of the pressing plate is provided with an adhesive layer for bonding with the clamping plate, and the first surface is the surface on the side where the vertical ribs are provided.

10. An electric vehicle, characterized in that: It comprises a car body and a battery pack according to any one of claims 1 to 9, wherein the battery pack is arranged inside the car body and is used to supply power to the car body.

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