Battery pack shell structure and automobile battery

Abstract

The utility model provides a battery pack shell structure and an automobile battery, and relates to the technical field of batteries, the battery pack shell structure comprises a protective shell main body, the protective shell main body is provided with an accommodating cavity for placing a battery pack, one side of the protective shell main body is provided with a first mounting beam, and the first mounting beam comprises a fixing part and a supporting part; the fixing part is connected with the protective shell body, one end of the supporting part is connected with the fixing part, and a cable-stayed reinforcing piece is arranged at the connecting position of the fixing part and the supporting part. By designing the cable-stayed structures at the mounting beams of the battery pack, the edges of the mounting beams are prevented from being folded upwards in the collision process, so that the mounting beams always keep the supporting strength, and the use safety of the battery pack is improved. The utility model further provides an automobile battery which adopts the battery pack shell structure to protect the internal battery pack, so that the situation of battery combustion during collision is effectively reduced, and the use safety of the automobile battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack shell structure and a car battery. Background Art

[0002] With the continuous emergence of various new energy vehicle models, there have been a large number of reports of battery pack collision and fire accidents, and the corresponding collision safety design has become more concerned about the safety of the cells in the battery pack. Since the battery pack is usually arranged at the bottom of the vehicle's passenger compartment, and the front and rear of the vehicle are far away from the battery pack, and the sides are close to the battery pack, the risk of battery pack damage in front collision and rear-end collision is relatively small, while the risk of battery pack being squeezed in side collision is greater.

[0003] The existing battery pack structure is prone to causing safety accidents when the battery cells are squeezed during a side collision. In particular, the side mounting beams of the battery pack are prone to bend over due to the collision, and the supporting cavity is low and easily deformed, which can easily cause the battery to be squeezed and damaged. Therefore, it is necessary to improve the battery pack shell to improve the safety of the battery pack. Utility Model Content

[0004] The purpose of the utility model is to provide a battery pack shell structure and a car battery to solve the above technical problems.

[0005] In the first aspect, an embodiment of the utility model provides a battery pack shell structure, which includes: a protective shell body, a accommodating cavity for placing the battery pack is provided on the protective shell body, a first mounting beam is provided on one side of the protective shell body, the first mounting beam includes a fixing part and a supporting part, the fixing part is connected to the protective shell body, one end of the supporting part is connected to the fixing part, and a diagonal reinforcement is provided at the connection between the fixing part and the supporting part.

[0006] Furthermore, the oblique reinforcement member is arranged at the bottom of the support portion, and two ends of the oblique reinforcement member are respectively connected to the fixing portion and the support portion to form a triangular support portion.

[0007] Furthermore, a protective frame is arranged at the edge of the protective shell body, the protective frame is arranged as a hollow structure, and a reinforcing plate is arranged inside the protective frame.

[0008] Furthermore, a buffer cavity is provided on the fixing portion of the first mounting beam, and the buffer cavity is a through hole structure with a trapezoidal cross section.

[0009] Furthermore, a buffer portion is provided on one side of the protective shell body close to the first mounting beam, and the buffer portion is used to protect the battery pack in the accommodating cavity.

[0010] Furthermore, a long beam is arranged inside the accommodating cavity, and a short beam is arranged correspondingly in the buffer portion. Both the long beam and the short beam are perpendicular to the first mounting beam, and the vertical height of the long beam is greater than the vertical height of the short beam.

[0011] Furthermore, a reinforcing bracket is provided at the connection between the short cross beam and the protective shell body.

[0012] Furthermore, a connection hole is provided on the reinforcing bracket, and a fixing screw or a fixing rivet can be passed through the connection hole.

[0013] Furthermore, a reinforcing beam is provided at the bottom of the protective shell body.

[0014] On the other hand, an embodiment of the present invention further provides an automotive battery, which includes a battery pack and any one of the above-mentioned battery pack shell structures, wherein the battery pack is disposed in a receiving cavity of the battery pack shell structure.

[0015] The utility model provides a battery pack shell structure, which includes: a protective shell body, a housing cavity for placing the battery pack is provided on the protective shell body, a first mounting beam is provided on one side of the protective shell body, the first mounting beam includes a fixing portion and a supporting portion, the fixing portion is connected to the protective shell body, one end of the supporting portion is connected to the fixing portion, and a diagonal reinforcement is provided at the connection between the fixing portion and the supporting portion. By designing a diagonal structure at the mounting beam of the battery pack, the edge of the mounting beam is prevented from folding upward during a collision, so that the mounting beam always maintains the supporting strength, thereby improving the safety of the battery pack.

[0016] The utility model also provides an automobile battery, which adopts the battery pack shell structure to protect the internal battery pack, effectively reducing the battery burning situation when a collision occurs, and improving the safety of automobile battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional diagram of a protective shell body provided by an embodiment of the utility model;

[0019] Figure 2 A side view of the protective shell body provided by an embodiment of the utility model;

[0020] Figure 3 A structural diagram of a first mounting beam in a protective shell body provided by an embodiment of the utility model;

[0021] Figure 4 A three-dimensional diagram of a reinforcing bracket in a protective shell body provided in an embodiment of the utility model.

[0022] Icon: 100-protective shell body; 101-accommodating cavity; 200-first mounting beam; 201-fixing part; 202-supporting part; 203-diagonal reinforcement; 102-protective frame; 1021-reinforcement plate; 2011-buffer cavity; 103-buffer part; 104-long beam; 105-short beam; 300-reinforcement bracket; 301-connecting hole; 106-reinforcement beam; 400-second mounting beam. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] Example 1

[0029] The present embodiment provides a battery pack shell structure, which includes: a protective shell body 100, a receiving cavity 101 for placing the battery pack is provided on the protective shell body 100, a first mounting beam 200 is provided on one side of the protective shell body 100, and the first mounting beam 200 includes a fixing portion 201 and a supporting portion 202, the fixing portion 201 is connected to the protective shell body 100, one end of the supporting portion 202 is connected to the fixing portion 201, and a diagonal reinforcement 203 is provided at the connection between the fixing portion 201 and the supporting portion 202.

[0030] Please refer to Figure 1 and Figure 2As shown, in this embodiment, the protective shell body 100 can be set to any shape according to the shape of the battery pack, such as square, arc or other irregular shapes. The center of the protective shell body 100 is recessed to form a receiving cavity 101, and the battery pack is placed in the receiving cavity 101. A first mounting beam 200 is provided on one side of the protective shell body 100. It should be noted that the battery pack shell structure provided in this embodiment is mainly used to install and protect the battery pack of the new energy vehicle. The battery pack shell needs to be installed at the bottom of the new energy vehicle. In this embodiment, the first mounting beam 200 is located on the side of the protective shell body 100 close to the outside of the vehicle. On the one hand, the first mounting beam 200 is used to fix the protective shell body 100 and the internal battery pack on the vehicle chassis by means of fixing bolts. On the other hand, the first mounting beam 200 can play a protective role and improve the support strength at the edge of the protective shell body 100. It can be understood that when encountering an emergency, the driver's instinctive reaction is to turn the steering wheel to avoid a frontal collision, which results in an offset collision that is much greater than a direct frontal collision. When an offset collision occurs, the impact force of the collision can easily squeeze the battery pack shell, causing the chemical substances in the battery pack to leak and burn, leading to safety accidents. Therefore, the strength of the first mounting beam 200, which is the first to be squeezed and collided, plays an important role in ensuring the safety of the battery pack and improving the safety of the entire battery pack. In this embodiment, the first mounting beam 200 includes a fixing portion 201 and a supporting portion 202. The fixing portion 201 is fixedly connected to the protective shell body 100 to ensure the connection strength of the entire first mounting beam 200 and the protective shell body 100. One end of the supporting portion 202 is connected to the fixing portion 201, and the other end extends in a direction away from the protective shell body 100 to form a protruding mounting portion. A number of fixing holes can be provided on the supporting portion 202, and the entire protective body can be fixed to the chassis of the vehicle by fixing bolts, rivets, etc. The first mounting beam 200 is connected by a fixing portion 201 and a supporting portion 202 to form an L-shaped structure. The protruding supporting portion 202 not only facilitates installation and fixing, but also increases the supporting strength of the first mounting beam 200, improves the bending and fracture resistance of the first mounting beam 200, and prevents the first mounting beam 200 from deforming and squeezing the battery pack in the accommodating cavity 101 after being impacted, thereby improving the safety of the entire protective shell body 100. At the same time, a diagonal reinforcement 203 is provided at the connection between the fixing portion 201 and the supporting portion 202. The two ends of the diagonal reinforcement 203 are respectively connected to the fixing portion 201 and the supporting portion 202, which plays an auxiliary reinforcement role, preventing the supporting portion 202 from folding and deforming upward or downward, affecting the deformation and fracture resistance of the supporting portion 202. It can be understood that when an offset collision occurs, the impact force is mainly lateral, so the lateral length of the supporting portion 202 determines the bending resistance of the first mounting beam 200 when a collision occurs. However, the protruding support portion 202 may be folded upward or downward during a collision, thereby being unable to withstand the preset collision energy and being deformed.In this embodiment, by providing the diagonal reinforcement 203, the problem of folding of the support portion 202 can be well solved, the physical properties of the first mounting beam 200 are improved, and the strength of the protective shell body 100 and the safety of the entire battery pack are ensured.

[0031] Optionally, in some implementations of this embodiment, the diagonal reinforcement member 203 is disposed at the bottom of the support portion 202 , and two ends of the diagonal reinforcement member 203 are respectively connected to the fixing portion 201 and the support portion 202 to form a triangular support portion 202 .

[0032] Please refer to Figure 2 and Figure 3 As shown, in this embodiment, the diagonal reinforcement 203 is arranged on the lower end surface of the support portion 202, and the diagonal reinforcement 203 can be a diagonal plate structure. The two ends of the diagonal reinforcement 203 are respectively connected to the bottom of the support portion 202 and the side of the support portion 202 away from the fixed portion 201. The fixed portion 201, the support portion 202 and the diagonal reinforcement 203 form a stable triangular support structure to ensure the support strength of the first mounting beam 200 and prevent the support portion 202 from folding upward. Since the diagonal structure of the diagonal reinforcement 203 forms a hollow triangular support structure, it will not cause the weight of the first mounting beam 200 to increase excessively, thereby improving the practicality of the protective shell body 100.

[0033] Optionally, in some implementations of this embodiment, a protective frame 102 is provided at the edge of the protective shell body 100 , the protective frame 102 is provided as a hollow structure, and a reinforcing plate 1021 is provided inside the protective frame 102 .

[0034] Please refer to Figure 2 and Figure 3 As shown, in this embodiment, a hollow protective frame 102 is provided at the periphery of the protective shell body 100, and the protective frame 102 can protect the battery pack placed in the accommodating cavity 101. The protective frame 102 is set as a hollow structure, which can increase the thickness of the protective frame 102 and increase the protection strength, while avoiding excessive increase in the weight of the protective shell body 100, which affects the performance of the car. One or more reinforcing plates 1021 are provided in the internal cavity of the protective frame 102, and the reinforcing plates are arranged horizontally to increase the support strength of the protective frame 102 and avoid deformation of the protective frame 102.

[0035] Optionally, in some implementations of this embodiment, the fixing portion 201 of the first mounting beam 200 is provided with a buffer cavity 2011 , and the buffer cavity 2011 is a through hole structure with a trapezoidal cross section.

[0036] Please refer to Figure 3As shown, in the present embodiment, a buffer cavity 2011 is provided inside the fixing portion 201 and the supporting portion 202. Specifically, the buffer cavity 2011 of the fixing portion 201 is a through hole structure with a trapezoidal cross section. In addition to increasing the bending resistance of the protective frame 102 and the first mounting beam 200, an inclined supporting surface can also be formed in the fixing portion 201, which can effectively reduce the possibility of the supporting portion 202 becoming unstable and flipping over when colliding with a side column, so that the supporting portion 202 can absorb more collision energy.

[0037] Optionally, in some implementations of this embodiment, a buffer portion 103 is provided on one side of the protective shell body 100 close to the first mounting beam 200 , and the buffer portion 103 is used to protect the battery pack in the accommodating cavity 101 .

[0038] Please refer to Figure 1 As shown, in the present embodiment, a buffer portion 103 is provided on one side of the protective shell body 100 close to the first mounting beam 200. The buffer portion 103 is used to isolate the accommodating cavity 101 and the first mounting beam 200. When a large collision or extrusion occurs, the buffer portion 103 is deformed first to prevent the impact force from directly acting on the battery pack in the accommodating cavity 101. The buffer portion 103 plays a buffering and protective role, thereby further improving the safety of the battery pack.

[0039] Optionally, in some implementations of the present embodiment, a long beam 104 is provided on the inner bottom wall of the accommodating cavity 101, and a short beam 105 is correspondingly provided on the buffer portion 103. Both the long beam 104 and the short beam 105 are perpendicular to the first mounting beam 200, and the supporting strength of the long beam 104 is greater than the supporting strength of the short beam 105.

[0040] Please refer to Figure 1 As shown, in the present embodiment, a number of long beams 104 are arranged at intervals in the accommodating cavity 101. A number of short beams 105 are correspondingly arranged in the buffer portion 103. The long beams 104 and the end beams are perpendicular to the first mounting beam 200, and play a role in supporting and reinforcing the entire protective shell body 100. At the same time, the vertical height of the long beam 104 is greater than the vertical height of the end beam, so that the support strength of the long beam 104 is greater than the support strength of the short beam 105. In the case where the collision extrusion force is too large, the collision energy can be absorbed by crushing and deforming the beam, thereby ensuring the structural stability of the battery cell position in the long beam 104 area.

[0041] Optionally, in some implementations of this embodiment, a reinforcing bracket 300 is provided at the connection between the short cross beam 105 and the protective shell body 100 .

[0042] In this embodiment, one end of the end cross beam is connected to the protective shell body 100, and a reinforcing bracket 300 is provided at the connection. Figure 1 and Figure 4As shown, the reinforcing bracket 300 is provided with a wider supporting surface, which plays the role of fixing and auxiliary support. The wide-section supporting structure can effectively prevent the local failure caused by stress concentration that is prone to occur in traditional structures, thereby ensuring the connection strength and stability between the end cross beam and the protective shell body 100.

[0043] Optionally, in some implementations of this embodiment, a connection hole 301 is opened on the reinforcing bracket 300, and a fixing screw or a fixing rivet can be passed through the connection hole 301.

[0044] Please refer to Figure 4 In this embodiment, the reinforcing bracket 300 is provided with a plurality of connection holes 301, and the reinforcing bracket 300 is fixedly connected with the short crossbeam 105 and the protective shell body 100 by fixing bolts, screws or rivets. The reinforcing bracket 300 is provided with a plurality of connection holes 301 to form a plurality of fixing points to ensure the stability of the connection. At the same time, the plurality of fixing points helps to disperse the impact force and improve the support and protection effect of the short crossbeam 105.

[0045] Optionally, in some implementations of this embodiment, a reinforcing beam 106 is provided at the bottom of the protective shell body 100 .

[0046] Please refer to Figure 1 As shown, in this embodiment, in order to ensure the structural stability of the protective shell body and the battery pack position, a reinforcing beam 106 is provided at the bottom of the protective shell body 100, and an impact-resistant component connected to the reinforcing beam 106 can be provided in the buffer area, thereby dispersing the collision extrusion force to the bottom area and reducing the impact on the accommodating cavity 101 area.

[0047] Optionally, in some implementations of this embodiment, a second mounting beam 400 is provided on a side of the protective shell body 100 away from the first mounting beam 200 .

[0048] Please refer to Figure 2 As shown, in this embodiment, the interior of the second mounting beam 400 is also set as a hollow structure. Under the premise of ensuring that the weight of the second mounting beam 400 meets the requirements, the thickness of the second mounting beam 400 is increased, thereby increasing the supporting strength of the second mounting beam 400. The second mounting beam 400 is set as an arched structure, so that the second mounting beam 400 has good impact resistance and extrusion resistance. The first mounting beam 200 and the second mounting beam 400 are relatively arranged on both sides of the protective shell body 100. The first mounting beam 200 and the second mounting beam 400 can be used to connect the protective shell body 100 to the external vehicle to ensure the stability of the protective shell body 100 after connection. At the same time, the first mounting beam 200 and the second mounting beam 400 absorb the impact force during the collision, thereby improving the impact resistance of the protective shell body 100, thereby improving the safety of the battery pack.

[0049] Example 2

[0050] The present embodiment provides an automobile battery, which includes a battery pack and the above-mentioned battery pack shell structure, and the battery pack is disposed in a receiving cavity 101 of the battery pack shell structure.

[0051] In this embodiment, the battery pack can be fixed in the accommodating cavity 101 of the battery pack shell structure by bonding, bolting, clamping, etc. to prevent the battery pack from being displaced and colliding. The battery pack shell structure can be installed on the chassis of the car to achieve the installation and fixation of the battery pack. The first mounting beam 200 with the diagonal reinforcement 203 on the battery pack shell structure fixes and protects the battery pack in the accommodating cavity 101, thereby improving the safety of the entire car battery.

[0052] Optionally, in some implementations of this embodiment, the battery pack housing structure further includes a sealing cover, which is covered on the accommodating cavity 101 of the protective shell body 100. The sealing cover and the protective shell body 100 form a sealing structure to seal the battery pack in the accommodating cavity 101, effectively preventing liquid from contacting the battery pack and causing damage to the battery pack, thereby improving the service life and safety of the vehicle battery.

[0053] In summary, the utility model provides a battery pack shell structure, which includes: a protective shell body 100, a receiving cavity 101 for placing a battery pack is provided on the protective shell body 100, a first mounting beam 200 is provided on one side of the protective shell body 100, and the first mounting beam 200 includes a fixing portion 201 and a supporting portion 202, the fixing portion 201 is connected to the protective shell body 100, one end of the supporting portion 202 is connected to the fixing portion 201, and a diagonal reinforcement 203 is provided at the connection between the fixing portion 201 and the supporting portion 202. By designing a diagonal structure at the mounting beam of the battery pack, the edge of the mounting beam is prevented from folding upward during a collision, so that the mounting beam always maintains the supporting strength, thereby improving the safety of the battery pack.

[0054] The utility model also provides an automobile battery, which adopts the above-mentioned battery pack shell structure, fixes and protects the battery pack through the first mounting beam 200 on the battery pack shell structure, effectively reduces the possibility of battery burning when a collision occurs, and improves the safety of automobile battery use.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery pack housing structure, characterized in that: include: A protective shell body (100), wherein a receiving cavity (101) for placing a battery pack is provided on the protective shell body (100), and a first mounting beam (200) is provided on one side of the protective shell body (100), wherein the first mounting beam (200) comprises a fixing portion (201) and a supporting portion (202), wherein the fixing portion (201) is connected to the protective shell body (100), and one end of the supporting portion (202) is connected to the fixing portion (201), and a diagonal reinforcement member (203) is provided at the connection between the fixing portion (201) and the supporting portion (202).

2. The battery pack housing structure according to claim 1, characterized in that: The oblique reinforcement member (203) is arranged at the bottom of the support portion (202), and two ends of the oblique reinforcement member (203) are respectively connected to the fixing portion (201) and the support portion (202) to form a triangular support portion (202).

3. The battery pack housing structure according to claim 1, characterized in that: A protective frame (102) is provided at the edge of the protective shell body (100); the protective frame (102) is configured as a hollow structure, and a reinforcing plate (1021) is provided inside the protective frame (102).

4. The battery pack housing structure according to claim 3, characterized in that: The fixing portion (201) of the first mounting beam (200) is provided with a buffer cavity (2011), and the buffer cavity (2011) is a through-hole structure with a trapezoidal cross-section.

5. The battery pack housing structure according to any one of claims 1 to 4, characterized in that: A buffer portion (103) is provided on one side of the protective shell body (100) close to the first mounting beam (200), and the buffer portion (103) is used to protect the battery pack in the accommodating cavity (101).

6. The battery pack housing structure according to claim 5, characterized in that: A long crossbeam (104) is arranged inside the accommodating cavity (101), and a short crossbeam (105) is correspondingly arranged in the buffer portion (103); the long crossbeam (104) and the short crossbeam (105) are both perpendicular to the first mounting beam (200), and the vertical height of the long crossbeam (104) is greater than the vertical height of the short crossbeam (105).

7. The battery pack housing structure according to claim 6, characterized in that: A reinforcing bracket (300) is provided at the connection between the short crossbeam (105) and the protective shell body (100).

8. The battery pack housing structure according to claim 7, characterized in that: The reinforcing bracket (300) is provided with a connection hole (301), and a fixing screw or a fixing rivet can be inserted into the connection hole (301).

9. The battery pack housing structure according to claim 1, characterized in that: A reinforcing beam (106) is provided at the bottom of the protective shell body (100).

10. An automobile battery, characterized in that: It comprises a battery pack and a battery pack shell structure as claimed in any one of claims 1 to 9, wherein the battery pack is arranged in a receiving cavity (101) of the battery pack shell structure.

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