Bottom protection plate and battery pack with same

Abstract

The utility model provides a bottom protection plate and a battery pack with the bottom protection plate. The bottom protection plate comprises a first plate and a second plate, the first plate and the second plate are suitable for being stacked at the bottom of the battery pack; and the supporting piece is arranged between the first plate and the second plate, so that an energy absorption space is formed between the first plate and the second plate. According to the bottom protection plate disclosed by the utility model, the supporting piece is arranged, so that the energy absorption space is formed between the first plate and the second plate, the energy absorption space can protect the bottom of the battery pack, the use safety of the battery pack is improved, meanwhile, the deformation resistance of the bottom protection plate can be improved, and the reliability and the safety of the bottom protection plate can also be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack manufacturing, in particular to a bottom guard plate and a battery pack having the same. Background Art

[0002] In the existing battery pack, when objects such as gravel hit the bottom of the battery pack, the bottom guard plate is easily deformed. At the same time, the deformed bottom guard plate will invade into the battery pack, which is not conducive to improving the safety of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a bottom guard plate, which can improve the safety of battery pack.

[0004] The utility model also provides a battery pack having the bottom protective plate.

[0005] According to the embodiment of the utility model, the bottom guard plate includes: a first plate; a second plate, wherein the first plate and the second plate are suitable for being stacked at the bottom of the battery pack; and a support member, wherein the support member is arranged between the first plate and the second plate to form an energy absorption space between the first plate and the second plate.

[0006] According to the bottom guard plate of the utility model, a support member is provided to form an energy-absorbing space between the first plate and the second plate. The energy-absorbing space can protect the bottom of the battery pack and improve the safety of the battery pack. At the same time, the deformation resistance of the bottom guard plate can be increased, and the reliability and safety of the bottom guard plate can be enhanced.

[0007] According to some embodiments of the present invention, there are multiple support members, and the multiple support members are arranged at intervals between the first plate and the second plate.

[0008] According to some embodiments of the present invention, the first plate is formed as a liquid cooling plate, a liquid cooling channel is formed in the liquid cooling plate, and the second plate is arranged on the lower side of the first plate.

[0009] According to some embodiments of the utility model, the support member includes: a first support portion, wherein the number of the first support portions is two, and the two first support portions are arranged at intervals along the length direction of the support member; a second support portion, wherein the second support portion is arranged between the two first support portions, and the two ends of the second support portion are respectively connected to the two first support portions, and at least a portion of the second support portion is lower than the first support portion.

[0010] According to some optional embodiments of the present invention, the second supporting part includes: a first section, one end of the first section is connected to one of the first supporting parts; a second section, the second section and the first section are arranged at intervals along the length direction of the second supporting part, and one end of the second section is connected to another first supporting part; a third section, both ends of the third section are respectively connected to the other end of the first section and the other end of the second section, and the third section is lower than the first supporting part.

[0011] According to some embodiments of the present invention, the first supporting portion is connected to the first plate, and the second supporting portion is connected to the second plate.

[0012] According to some embodiments of the utility model, the first support portion is provided with an avoidance hole, the avoidance hole passes through the edge of the first support portion, and / or the second support portion is provided with a rivet hole, the rivet hole passes through the second support portion along the thickness direction of the second support portion.

[0013] According to some embodiments of the present invention, the first support portion is connected to the first plate by welding, and the second support portion is connected to the second plate by riveting.

[0014] According to some embodiments of the present invention, reinforcing ribs protruding away from the first plate are formed on the second plate, and the number of the reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged at intervals on the second plate.

[0015] The battery pack according to the embodiment of the second aspect of the utility model comprises: a shell, in which a accommodating cavity is formed; and a bottom guard plate according to the first aspect of the utility model, the bottom guard plate sealing the bottom of the accommodating cavity.

[0016] According to the battery pack of the utility model, by setting the bottom guard plate of the above-mentioned first aspect embodiment and setting a support member, an energy absorption space is formed between the first plate and the second plate. The energy absorption space can protect the bottom of the battery pack and improve the safety of the battery pack. At the same time, the deformation resistance of the bottom guard plate can be increased, and the reliability and safety of the bottom guard plate can be enhanced.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 An exploded view of the battery pack shown in;

[0020] Figure 3 yes Figure 2 A schematic diagram of the first plate and the support member shown in ;

[0021] Figure 4 yes Figure 2 A schematic diagram of the second plate and the support member shown in ;

[0022] Figure 5 yes Figure 4 A schematic diagram of the second plate shown in ;

[0023] Figure 6 yes Figure 4 Schematic diagram of the support member shown in .

[0024] Reference numerals:

[0025] 100, bottom guard plate;

[0026] 10. First board;

[0027] 20. Second plate; 21. Reinforcement ribs;

[0028] 30. Support member; 31. First support portion; 311. Avoidance hole; 32. Second support portion; 321. First section; 322. Second section; 323. Third section; 3231. Riveting hole;

[0029] 200, housing; 210, upper housing; 220, lower housing;

[0030] 300. Battery module;

[0031] 1000. Battery pack. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] Please refer to the following Figure 1-6 A bottom guard plate 100 according to an embodiment of the present invention is described.

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 According to the embodiment of the utility model, the bottom guard plate 100 includes: a first plate 10, a second plate 20 and a support member 30.

[0035] Specifically, the first plate 10 and the second plate 20 are suitable for being stacked at the bottom of the battery pack 1000 ; the support member 30 is disposed between the first plate 10 and the second plate 20 to form an energy absorbing space between the first plate 10 and the second plate 20 .

[0036] The bottom guard plate 100 of the utility model is provided with a support member 30, so that an energy-absorbing space is formed between the first plate 10 and the second plate 20. When the bottom of the battery pack 1000 is hit, the energy-absorbing space can absorb the impact force and slow down the impact of the object on the battery pack 1000, thereby protecting the bottom of the battery pack 1000 and improving the safety of the battery pack 1000. At the same time, the first plate 10 and the second plate 20 cooperate to protect the bottom of the battery pack 1000, which can increase the anti-deformation ability of the bottom guard plate 100 and enhance the reliability and safety of the bottom guard plate 100. In addition, when the vehicle runs on a bumpy road, even if the bottom of the battery pack 1000 is scraped, the energy-absorbing space can reduce the amount of intrusion of the bottom guard plate 100 into the interior of the battery pack 1000, thereby further ensuring the safety of the battery pack 1000.

[0037] According to the bottom guard plate 100 of the embodiment of the utility model, a support member 30 is provided to form an energy absorption space between the first plate 10 and the second plate 20. The energy absorption space can protect the bottom of the battery pack 1000 and improve the safety of the battery pack 1000. At the same time, the deformation resistance of the bottom guard plate 100 can be increased, and the reliability and safety of the bottom guard plate 100 can also be enhanced.

[0038] According to some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 , the number of the supporting members 30 is multiple, that is, the number of the supporting members 30 can be two, three or four or more, and the multiple supporting members 30 are arranged at intervals between the first plate 10 and the second plate 20. Therefore, by providing multiple supporting members 30, the first plate 10 and the second plate 20 are supported at multiple points, so as to avoid the first plate 10 or the second plate 20 from being sunken and affecting the height of the energy absorption space, thereby ensuring the stability of the energy absorption space.

[0039] For example, Figure 2 , Figure 3 and Figure 4 As shown, the number of the support members 30 is seven, and the seven support members 30 are arranged at intervals along the front-to-back direction between the first plate 10 and the second plate 20 .

[0040] According to some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4The first plate 10 is formed as a liquid cooling plate, and a liquid cooling channel is formed in the liquid cooling plate. The second plate 20 is arranged on the lower side of the first plate 10. Therefore, the first plate 10 can perform heat exchange for the battery pack 1000, thereby preventing the battery pack 1000 from thermal runaway damage. At the same time, the second plate 20 can protect the first plate 10 and prevent the first plate 10 from being damaged, thereby ensuring the service life of the first plate 10. Preferably, the first plate 10 and the second plate 20 are sheet metal parts, so that the strength of the first plate 10 and the second plate 20 can be ensured and the first plate 10 and the second plate 20 can be prevented from being damaged.

[0041] According to some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 The support member 30 includes: a first support portion 31 and a second support portion 32. There are two first support portions 31, and the two first support portions 31 are arranged at intervals along the length direction of the support member 30; the second support portion 32 is arranged between the two first support portions 31, and the two ends of the second support portion 32 are respectively connected to the two first support portions 31, and at least part of the second support portion 32 is lower than the first support portion 31, that is, part of the second support portion 32 may be lower than the first support portion 31, or the entire second support portion 32 may be lower than the first support portion 31.

[0042] In this way, the first support part 31 and the second support part 32 are provided, so that the support member 30 is supported between the first plate 10 and the second plate 20, and the support member 30 is connected to the first plate 10 and the second plate 20. Furthermore, the second support part 32 is at a different height from the first support part 31, so that when the support member 30 is provided between the first plate 10 and the second plate 20, an energy absorbing space can be formed between the first plate 10 and the second plate 20.

[0043] For example, Figure 2 , Figure 3 and Figure 4 As shown, the first support part 31 is arranged at the front and rear ends of the second support part 32, the front end of the second support part 32 is connected to a first support part 31, the rear end of the second support part 32 is connected to a first support part 31, and a portion of the second support part 32 is lower than the first support part 31.

[0044] According to some optional embodiments of the present invention, referring to Figure 6 The second support portion 32 includes: a first section 321, a second section 322 and a third section 323. One end of the first section 321 (such as Figure 6 The upper end of the first section 321 shown in the figure is connected to one of the first support parts 31; the second section 322 is connected to the first section 321 along the length direction of the second support part 32 (as shown in the figure); Figure 6The second support portion 32 is arranged in a spaced relationship in the front-to-back direction. One end of the second section 322 (such as Figure 6 The upper end of the second section 322 shown in FIG. 3 is connected to another first support portion 31; both ends of the third section 323 (as shown in FIG. Figure 6 The front and rear ends of the third section 323 shown in FIG. 3 are respectively connected to the other end of the first section 321 (as shown in FIG. Figure 6 The lower end of the first section 321 shown in FIG. 1 ) and the other end of the second section 322 (as shown in FIG. Figure 6 The third section 323 is lower than the first supporting portion 31 .

[0045] In this way, this arrangement can make the heights of the first support portion 31 and the second support portion 32 different. When the support member 30 is arranged between the first plate 10 and the second plate 20, an energy absorption space can be formed between the first plate 10 and the second plate 20 through the action of the support member 30, thereby ensuring the energy absorption function of the bottom guard plate 100.

[0046] For example, Figure 6 As shown, the first section 321 is vertically arranged, the upper end of the first section 321 is connected to the rear end of the first support portion 31 on the front side, and the lower end of the first section 321 extends downward; the second section 322 is vertically arranged, the upper end of the second section 322 is connected to the rear end of the first support portion 31 on the rear side, and the lower end of the second section 322 extends downward; the third section 323 is extended along the front-to-back direction, the front end of the third section 323 is connected to the lower end of the first section 321, and the rear end of the third section 323 is connected to the lower end of the second section 322; the first section 321, the second section 322 and the third section 323 cooperate to form a U-shaped structure protruding downward, so that the second support portion 32 is lower than the first support portion 31 in the up and down directions.

[0047] According to some embodiments of the present invention, referring to Figure 3 , Figure 4 and Figure 6 The first support part 31 is connected to the first plate 10, and the second support part 32 is connected to the second plate 20. Thus, it can be ensured that the support member 30 can be stably connected to the first plate 10 and the second plate 20, thereby preventing the support member 30 from being separated from the first plate 10 or the second plate 20.

[0048] According to some optional embodiments of the present invention, referring to Figure 6 The first support portion 31 is provided with an avoidance hole 311, and the avoidance hole 311 runs through the edge of the first support portion 31. Thus, the avoidance hole 311 can avoid the connection point on the first plate 10, so as not to affect the connection between the first plate 10 and other structures.

[0049] For example, Figure 6As shown, the avoidance hole 311 is provided at the edge of the first support portion 31 away from the second support portion 32 , and the avoidance hole 311 penetrates the first support portion 31 in the up-down direction. The cross section of the avoidance hole 311 extends in an arc shape from the edge of the first support portion 31 toward the second support portion 32 .

[0050] Furthermore, if Figure 6 As shown, the second support portion 32 is provided with a rivet hole 3231, and the rivet hole 3231 is formed along the thickness direction of the second support portion 32 (such as Figure 6 The second support part 32 is connected to the second plate 20 in an upward and downward direction as shown in FIG. 2 , so that the connection strength between the support member 30 and the second plate 20 can be ensured, and the support member 30 and the second plate 20 can be effectively prevented from being separated.

[0051] For example, Figure 6 As shown, a rivet hole 3231 is provided in the middle of the second support portion 32 . The rivet hole 3231 penetrates the second support portion 32 in the up-down direction and is circular.

[0052] According to some optional embodiments of the present invention, referring to Figure 3 , Figure 4 and Figure 6 The first support part 31 is welded to the first plate 10, and the second support part 32 is riveted to the second plate 20. Thus, the connection strength between the support member 30 and the first plate 10 and the second plate 20 can be ensured, thereby effectively preventing the support member 30 from being separated from the first plate 10 and the second plate 20.

[0053] Preferably, the support member 30 is connected to the first plate 10 by a brazing process, which can ensure the connection strength between the support member 30 and the first plate 10, and the support member 30 is connected to the second plate 20 by a blind rivet process, which can ensure the connection strength between the support member 30 and the second plate 20.

[0054] According to some embodiments of the present invention, referring to Figure 4 and 5 , a reinforcing rib 21 protruding away from the first plate 10 is formed on the second plate 20, and the number of the reinforcing ribs 21 is multiple, that is, the number of the reinforcing ribs 21 can be two, three, or four or more, and the multiple reinforcing ribs 21 are arranged at intervals on the second plate 20. Therefore, the reinforcing rib 21 can strengthen the strength of the second plate 20, thereby preventing the second plate 20 from being damaged, and further ensuring the strength of the bottom guard plate 100 and enhancing the anti-collision ability of the bottom guard plate 100. At the same time, the reinforcing rib 21 can also strengthen the area not involved by the fixing bolts at the edge of the bottom guard plate 100, thereby effectively improving the rigidity of the bottom guard plate 100 and effectively preventing the bottom guard plate 100 from being damaged.

[0055] For example, Figure 4 and Figure 5 As shown, the reinforcing rib 21 protrudes downward, and the reinforcing rib 21 extends in the left-right direction. There are multiple reinforcing ribs 21, and the multiple reinforcing ribs 21 are arranged at intervals in the front-back direction.

[0056] According to the battery pack 1000 of the second embodiment of the utility model, refer to Figure 1 , including: a shell 200 and a bottom guard plate 100 of the first aspect of this embodiment, a receiving cavity is formed in the shell 200; the bottom guard plate 100 is sealed with the bottom of the receiving cavity.

[0057] According to the battery pack 1000 of the embodiment of the utility model, by setting the bottom guard plate 100 of the above-mentioned first aspect embodiment and setting the support member 30, an energy absorption space is formed between the first plate 10 and the second plate 20. The energy absorption space can protect the bottom of the battery pack 1000 and improve the safety of the battery pack 1000. At the same time, the deformation resistance of the bottom guard plate 100 can be increased, and the reliability and safety of the bottom guard plate 100 can also be enhanced.

[0058] Furthermore, if Figure 1 and Figure 2 As shown, the shell 200 includes: an upper shell 210 and a lower shell 220, the upper shell 210 is sealed on the upper side of the lower shell 220, the upper shell 210, the lower shell 220 and the bottom guard plate 100 cooperate to form a closed accommodating cavity, the battery module 300 is arranged in the accommodating cavity and supported on the bottom guard plate 100, so as to protect the battery module 300.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "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 invention 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 invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention 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 invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bottom guard plate (100), applied to a battery pack (1000), characterized in that: include: a first plate (10); a second plate (20), wherein the first plate (10) and the second plate (20) are suitable for being stacked and arranged at the bottom of the battery pack (1000); A support member (30) is disposed between the first plate (10) and the second plate (20) so as to form an energy absorbing space between the first plate (10) and the second plate (20).

2. The bottom guard plate (100) according to claim 1, characterized in that: There are a plurality of the support members (30), and the plurality of the support members (30) are arranged at intervals between the first plate (10) and the second plate (20).

3. The bottom guard plate (100) according to claim 1, characterized in that: The first plate (10) is formed as a liquid cooling plate, a liquid cooling channel is formed in the liquid cooling plate, and the second plate (20) is arranged on the lower side of the first plate (10).

4. The bottom guard plate (100) according to claim 1, characterized in that: The support member (30) comprises: A first support portion (31), wherein the number of the first support portions (31) is two, and the two first support portions (31) are arranged at intervals along the length direction of the support member (30); A second supporting portion (32), wherein the second supporting portion (32) is arranged between the two first supporting portions (31), two ends of the second supporting portion (32) are respectively connected to the two first supporting portions (31), and at least a portion of the second supporting portion (32) is lower than the first supporting portion (31).

5. The bottom guard plate (100) according to claim 4, characterized in that: The second supporting portion (32) comprises: A first section (321), one end of the first section (321) being connected to one of the first supporting parts (31); a second section (322), wherein the second section (322) and the first section (321) are arranged at intervals along the length direction of the second supporting portion (32), and one end of the second section (322) is connected to another first supporting portion (31); The third section (323), two ends of the third section (323) are respectively connected to the other end of the first section (321) and the other end of the second section (322), and the third section (323) is lower than the first supporting portion (31).

6. The bottom guard plate (100) according to claim 4, characterized in that: The first supporting portion (31) is connected to the first plate (10), and the second supporting portion (32) is connected to the second plate (20).

7. The bottom guard plate (100) according to claim 6, characterized in that: The first supporting portion (31) is provided with an avoidance hole (311), and the avoidance hole (311) passes through the edge of the first supporting portion (31). And / or, the second support portion (32) is provided with a rivet hole (3231), and the rivet hole (3231) penetrates the second support portion (32) along the thickness direction of the second support portion (32).

8. The bottom guard plate (100) according to claim 7, characterized in that: The first supporting portion (31) is connected to the first plate (10) by welding, and the second supporting portion (32) is connected to the second plate (20) by riveting.

9. The bottom guard plate (100) according to claim 1, characterized in that: The second plate (20) is formed with reinforcing ribs (21) protruding toward and away from the first plate (10), and the number of the reinforcing ribs (21) is multiple, and the multiple reinforcing ribs (21) are arranged at intervals on the second plate (20).

10. A battery pack (1000), characterized in that: include: A housing (200), wherein a receiving cavity is formed in the housing (200); The bottom guard plate (100) according to any one of claims 1 to 9, wherein the bottom guard plate (100) seals the bottom of the accommodating cavity.

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