Power battery pack and vehicle

Abstract

The present application discloses a power battery pack and a vehicle, the power battery pack includes: a battery pack body and an arc-shaped support structure, the battery pack body includes a tray, a battery cell arranged in the tray, the tray includes a top plate, a bottom plate and a frame connecting the top plate and the bottom plate, the frame includes two long frames and two short frames, the two long frames are arranged oppositely in a first direction and each long frame extends along a second direction, the two short frames are arranged oppositely in a second direction and each short frame extends along the first direction, and the two ends of the tray in the length direction are formed as energy absorption zones; the arc-shaped support structure is connected to the outside of the long frame, and is used to guide the collision column to the energy absorption zone when a collision occurs. In this way, due to the provision of the arc-shaped support structure, the impact of the collision column can be resisted during the collision process, and the collision column can be guided to the front and rear energy absorption zones, so as to consume the collision energy received by the battery pack, and prevent the battery pack from leaking, catching fire, exploding and other safety accidents due to collision and extrusion.

Description

Technical Field

[0001] The present application relates to the technical field of power battery packs, and in particular to a power battery pack and a vehicle. Background Art

[0002] like Figure 1 As shown, the power battery pack 100' adopts an integrated design in terms of the frame and the tray. When the frame of the tray is squeezed by the collision column 200', the side frame of the power battery pack will be deformed due to the squeezing force. If the tray is not strong enough after being squeezed, it will cause further squeezing of the battery cells, resulting in safety accidents such as battery cell leakage and battery pack short circuit. When the tray is strong enough or the collision intensity is not large, the squeezing of the battery cells will not cause safety accidents, but the power battery pack needs to be further repaired before it can continue to be used due to the squeezing damage of the frame. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a power battery pack, which has a better side impact resistance effect.

[0004] According to the first aspect of the present application, a power battery pack includes: a battery pack main body and an arc-shaped support structure, wherein the battery pack main body includes a tray and a battery cell arranged in the tray, the tray includes a top plate, a bottom plate and a frame connecting the top plate and the bottom plate, the frame includes two long frames and two short frames, the two long frames are arranged opposite to each other in a first direction and each long frame extends along a second direction, the two short frames are arranged opposite to each other in a second direction and each short frame extends along the first direction, and the two ends of the tray in the length direction are formed as energy absorption zones; the arc-shaped support structure is connected to the outer side of the long frame, and is used to guide the collision column to the energy absorption zone when a collision occurs.

[0005] In this way, due to the high-strength arc-shaped support structure, the impact of the collision column can be resisted during the collision process, and the collision column can be guided to the front and rear energy absorption areas to consume the collision energy of the battery pack, so that the battery pack will not be squeezed and damaged after being squeezed, thus protecting the power battery pack and preventing the battery pack from leaking, catching fire, exploding and other safety accidents due to collision and squeezing. Moreover, the battery pack after the collision can be recycled and used again, reducing the scrapping or repair costs of the battery pack due to collision damage.

[0006] In some embodiments, the distance between the arc-shaped support structure and the long frame gradually decreases from the middle to the two ends.

[0007] In some embodiments, the arc-shaped support structure is in the shape of an arc, and the corresponding central angle is 60°-90°.

[0008] In some embodiments, the arc-shaped support structure has a thickness of 30 mm to 50 mm.

[0009] In some embodiments, the arc-shaped support structure includes a support frame, a pulley, and a moving belt. The pulley is arranged in a receiving cavity of the support frame, and the moving belt is slidably matched with the support frame on the outside of the support frame. The pulley is configured to roll when the moving belt collides with the collision column to drive the push belt to move.

[0010] In some embodiments, the pulley is a cylindrical pulley column and the pulley is a fixed pulley; and / or

[0011] The number of the pulleys is 10-60; and / or

[0012] There are multiple pulleys, and the multiple pulleys are distributed in sequence along the extension direction of the support frame. The distance between adjacent pulleys is 1mm-100mm.

[0013] In some embodiments, there are multiple pulleys, and the positions of the pulleys in the extension direction of the support frame are adjustable.

[0014] In some embodiments, the arc-shaped support structure further includes a positioning support member, wherein the positioning support member is located in the support frame and between adjacent pulleys.

[0015] In some embodiments, the positioning support member is a plastic member or an elastic member, and the support frame and the moving belt are both made of metal materials.

[0016] In some embodiments, the support frame includes an inner wall, a top wall, a bottom wall and an outer flange, and the inner wall, top wall, bottom wall and outer flange together define the slide groove, the pulley and the moving belt are installed in the slide groove, and the moving belt is located between the pulley and the outer flange.

[0017] In some embodiments, a buffering energy absorbing member is further included, and the buffering energy absorbing member is arranged in the energy absorbing area.

[0018] In some embodiments, the buffering and energy absorbing member is connected to the arc-shaped support structure, and a passing gap is provided between the buffering and energy absorbing member and the arc-shaped support structure, and the passing gap is used for the moving belt to pass through.

[0019] The vehicle according to the second aspect of the present application includes the power battery pack, and the power battery pack is used to provide electrical energy for the vehicle.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of a traditionally designed power battery pack.

[0023] Figure 2 It is a schematic diagram of the power battery pack of the present application (the collision column is in the initial state).

[0024] Figure 3 It is a schematic diagram of the power battery pack of the present application (the collision column moves to the energy absorption zone).

[0025] Figure 4 yes Figure 3 A partial enlarged schematic diagram of the C area in the middle.

[0026] Figure 5 It is a schematic diagram of the power battery pack of the present application (the collision column moves to the energy absorption zone, and the moving belt is not shown).

[0027] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the D area in the middle.

[0028] Reference numerals:

[0029] Power battery pack 100, collision column 200,

[0030] Battery pack body 10, tray 11, top plate 111, bottom plate 112, short frame 113, long frame 114, energy absorption area a,

[0031] The arc-shaped support structure 20, the support frame 21, the inner wall 211, the top wall 212, the bottom wall 213, the outer flange 214, the slide groove 215, the pulley 22, the moving belt 23, through the gap b,

[0032] The buffer and energy absorbing member 30 . DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 2-Figure 6 A power battery pack 100 and a vehicle according to an embodiment of the present application are described.

[0034] The power battery pack 100 according to the first embodiment of the present application includes: a battery pack body 10 and an arc-shaped support structure 20 .

[0035] like Figure 2 and Figure 3As shown, the battery pack body 10 includes a tray 11 and a battery cell arranged in the tray 11. The tray 11 includes a top plate 111, a bottom plate 112 and a frame connecting the top plate 111 and the bottom plate 112. The frame includes two long frames 114 and two short frames 113. The two long frames 114 are arranged opposite to each other in a first direction and each long frame 114 extends along a second direction. The two short frames 113 are arranged opposite to each other in the second direction and each short frame 113 extends along the first direction. The two ends of the tray 11 in the length direction are formed as energy absorption areas a.

[0036] Specifically, the first direction is the width direction of the tray 11 (or the power battery pack 100), which is also the left-right direction, and the second direction is the length direction of the tray 11 (or the power battery pack 100), which is also the front-back direction. The top plate 111 and the bottom plate 112 of the tray 11 are opposite to each other in the thickness direction of the tray 11, the long frame 114 connects the long edge of the top plate 111 and the long edge of the bottom plate 112, and the short frame 113 connects the short edge of the top plate 111 and the short edge of the bottom plate 112.

[0037] The energy absorption zone a is located at both ends of the length direction of the tray 11, and can be arranged close to the two long frames 114, or close to the two short frames 113, or at the four corners of the tray 11. The energy absorption zone a can be provided with an energy absorbing member, which can be integrated on the power battery pack 100, or a component capable of absorbing collision energy can be arranged at a position corresponding to the energy absorption zone a on the vehicle.

[0038] The arc-shaped support structure 20 is connected to the outer side of the long frame 114 and is used to guide the collision column 200 to the energy absorption area a when a collision occurs.

[0039] In this way, due to the high-strength arc-shaped support structure 20, the impact of the collision column 200 can be resisted during the collision process, and the collision column 200 can be guided to the front and rear energy absorption areas a to consume the collision energy received by the battery pack, so that the battery pack will not be squeezed and damaged after being squeezed, thereby protecting the power battery pack 100 and preventing the battery pack from leaking, catching fire, exploding and other safety accidents due to collision and squeezing. In addition, the battery pack after the collision can be recycled and used, reducing the scrapping or repair costs of the battery pack due to collision damage.

[0040] In some embodiments, the distance between the arc-shaped support structure 20 and the long frame 114 gradually decreases from the middle to the two ends. Thus, a collision buffer space is formed between the arc-shaped support structure 20 and the long frame 114. The arc-shaped support structure 20 not only guides the collision column 200, but also enhances the overall structural strength and anti-collision performance of the tray 11.

[0041] Furthermore, the arc support structure 20 is in an arc shape, and the corresponding center angle is 60°-90°. Therefore, the design of the center angle is not only convenient for processing, but also provides sufficient buffer space for the impact when the impact force of the instantaneous impact is large.

[0042] Optionally, the thickness of the arc-shaped support structure 20 is 30 mm to 50 mm, thereby improving the strength of the arc-shaped support structure 20.

[0043] In some embodiments, Figure 2 As shown, the arc-shaped support structure 20 includes a support frame 21, a pulley 22, and a moving belt 23. The pulley 22 is arranged in the accommodating cavity of the support frame 21, and the moving belt 23 is slidably matched with the support frame 21 on the outside of the support frame 21. The pulley 22 is configured to roll when the moving belt 23 collides with the collision column 200 to drive the pushing belt to move.

[0044] Therefore, by designing the support frame 21 in advance as a support, it is ensured that the frame of the power battery pack 100 will not be deformed after the collision, thereby protecting the power battery pack 100; through the cooperation of the support frame 21, the moving belt 23, and the pulley 22, the sliding friction of the collision column 200 is quickly converted into rolling friction.

[0045] Alternatively, if Figure 3 , 4 As shown, the pulley 22 is a cylindrical pulley 22 column, and the pulley 22 is a fixed pulley 22. The number of the pulleys 22 is 10-60. The number of the pulleys 22 is multiple, and the multiple pulleys 22 are distributed in sequence along the extension direction of the support frame 21, and the distance between adjacent pulleys 22 is 1mm-100mm.

[0046] Therefore, when the moving belt 23 is hit by the collision column 200, the multiple pulleys 22 can rotate around their own axes in turn, driving the moving belt 23 and the collision column 200 to move toward the energy absorption area a as a whole, and the multiple pulleys 22 can stably support the moving belt 23 to ensure the strength of the side of the power battery pack 100.

[0047] In some embodiments, there are multiple pulleys 22, and the position of the pulleys 22 in the extension direction of the support frame 21 is adjustable. Therefore, each pulley 22 can still slide along the extension direction of the support frame 21 after the collision.

[0048] Optionally, the arc-shaped support structure 20 further includes a positioning support member (not shown in the figure), which is located in the support frame 21 and between adjacent pulleys 22. In this way, the positioning support member can position the pulley 22 to prevent the pulley 22 from moving out of position in a non-collision state.

[0049] Furthermore, the positioning support member is a plastic member or an elastic member, and the support frame 21 and the moving belt 23 are both made of metal materials. Therefore, when the collision force is large, the pulley 22 can squeeze the unit support member, and the positioning support member can play a role in buffering and absorbing energy.

[0050] In some embodiments, Figure 5 , 6 As shown, the support frame 21 includes an inner wall 211, a top wall 212, a bottom wall 213 and an outer flange 214. The inner wall 211, the top wall 212, the bottom wall 213 and the outer flange 214 together define a slide groove 215. The pulley 22 and the moving belt 23 are installed in the slide groove 215, and the moving belt 23 is located between the pulley 22 and the outer flange 214.

[0051] Specifically, the moving belt 23 is made of a high-hardness material and is installed in conjunction with the support frame 21 to form a slidable structure. There are two outer flanges 214, and the inner sides of the two outer flanges 214 form an upper slide rail and a lower slide rail, respectively. The top end of the pulley 22 and the upper edge of the moving belt 23 are installed in the upper slide rail, and the bottom end of the slide rail and the lower edge of the moving belt 23 are installed in the lower slide rail.

[0052] Therefore, slide rails are formed on both sides of the tray 11 in the width direction, and the collision column 200 is guided to the energy absorption zone a designed in advance in the front and rear areas through the arc shape of the slide rails. The front and rear energy absorption zones a are pre-arranged with elastic buffer energy absorption materials to quickly absorb the mechanical energy generated during the collision to protect the power battery pack 100.

[0053] Furthermore, the support frame 21 is integrally extruded with the tray 11. The support frame 21 is made of high-strength structural material and has ultra-high anti-extrusion strength. When the power battery pack 100 is extruded, it will not deform, ensuring that the arc-shaped slide rail can maintain normal operation. The support frame 21 is integrally formed with the tray 11, and the frame of the tray 11 of the power battery pack 100 is integrated with the support frame 21, which is more convenient to process and reduces the assembly process.

[0054] In some embodiments, a buffering energy absorbing member 30 is further included, and the buffering energy absorbing member 30 is arranged in the energy absorbing area a. Specifically, the buffering energy absorbing member 30 can be respectively arranged at the four corners of the power battery pack 100. The buffering energy absorbing member 30 can be arranged at the four corners of the battery pack, and the shape is square or round, and the material is a foamed porous material, and the mechanical energy of the collision column 200 is absorbed by volume change.

[0055] Furthermore, the buffering energy absorbing member 30 is connected to the arc-shaped support structure 20, and there is a through gap b between the buffering energy absorbing member 30 and the arc-shaped support structure 20, and the through gap b is used for the moving belt 23 to pass through. In this way, the through gap b for the moving belt 23 to pass through is set at the front and rear ends of the battery pack. When a collision occurs, the moving belt 23 quickly converts the sliding friction after the collision of the collision column 200 into rolling friction, moves forward or backward to the direction where the sliding occurs, and quickly guides the collision column 200 to the area where the buffering energy absorbing member 30 is located.

[0056] The vehicle according to the second embodiment of the present application includes a power battery pack 100, and the power battery pack 100 is used to provide electrical energy for the vehicle.

[0057] In this way, the vehicle uses the above-mentioned battery pack with anti-collision function, and the battery pack is provided with a total of 4 energy absorption zones a at the front and rear ends of the tray 11. When the vehicle encounters collision, extrusion and other working conditions, the collision pillar 200 can be guided to the front and rear energy absorption zones a through the high-strength structural arc anti-collision design on the outside of the battery pack. The energy-absorbing material arranged in the energy absorption zone a in advance can consume the collision energy received by the power battery pack 100, thereby protecting the power battery pack 100 and preventing the battery pack from leaking, catching fire, exploding and other safety accidents due to collision and extrusion.

[0058] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] In the description of the present application, "first feature" and "second feature" may include one or more of the features. In the description of the present application, "plurality" means two or more. In the description of the present application, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present application, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0061] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A power battery pack, characterized in that: include: A battery pack body, the battery pack body comprising a tray, a battery cell arranged in the tray, the tray comprising a top plate, a bottom plate, and a frame connecting the top plate and the bottom plate, the frame comprising two long frames and two short frames, the two long frames are arranged opposite to each other in a first direction and each long frame extends along a second direction, the two short frames are arranged opposite to each other in a second direction and each short frame extends along the first direction, and both ends of the tray in the length direction are formed as energy absorption areas; as well as An arc-shaped support structure is connected to the outer side of the long frame and is used to guide the collision column to the energy absorption area when a collision occurs.

2. The power battery pack according to claim 1, characterized in that: From the middle to the two ends, the distance between the arc-shaped support structure and the long frame gradually decreases.

3. The power battery pack according to claim 1, characterized in that: The arc-shaped support structure is in the shape of an arc, and the corresponding central angle is 60°-90°.

4. The power battery pack according to claim 1, characterized in that: The thickness of the arc-shaped support structure is 30 mm-50 mm.

5. The power battery pack according to claim 1, characterized in that: The arc-shaped support structure includes a support frame, a pulley, and a moving belt. The pulley is arranged in a receiving cavity of the support frame. The moving belt is slidably matched with the support frame on the outside of the support frame. The pulley is configured to roll when the moving belt collides with the collision column to drive the moving belt to move.

6. The power battery pack according to claim 5, characterized in that: The pulley is a cylindrical pulley column, and the pulley is a fixed pulley; and / or The number of the pulleys is 10-60; and / or There are multiple pulleys, and the multiple pulleys are distributed in sequence along the extension direction of the support frame. The distance between adjacent pulleys is 1mm-100mm.

7. The power battery pack according to claim 5, characterized in that: There are multiple pulleys, and the positions of the pulleys in the extending direction of the support frame are adjustable.

8. The power battery pack according to claim 5, characterized in that: The arc-shaped support structure also includes a positioning support member, which is located in the support frame and between adjacent pulleys.

9. The power battery pack according to claim 8, characterized in that: The positioning support member is a plastic member or an elastic member, and the support frame and the moving belt are both made of metal materials.

10. The power battery pack according to claim 5, characterized in that: The support frame includes an inner wall, a top wall, a bottom wall and an outer flange, and the inner wall, the top wall, the bottom wall and the outer flange together define a slide groove, the pulley and the moving belt are installed in the slide groove, and the moving belt is located between the pulley and the outer flange.

11. The power battery pack according to claim 5, characterized in that: The support frame and the tray are integrally extruded.

12. The power battery pack according to claim 10, characterized in that: It also includes a buffering energy absorbing member, which is arranged in the energy absorbing area.

13. The power battery pack according to claim 12, characterized in that: The buffering energy absorbing member is connected to the arc-shaped supporting structure, and a passing gap is provided between the buffering energy absorbing member and the arc-shaped supporting structure, and the passing gap is used for the moving belt to pass through.

14. A vehicle, characterized in that: Comprising a power battery pack as described in any one of claims 1 to 13, wherein the power battery pack is used to provide electrical energy for the vehicle.

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