Battery fixing structure and battery pack system

Abstract

The utility model relates to the technical field of power batteries, in particular to a battery fixing structure and a battery pack system.The battery fixing structure comprises a box body, a separation beam and an internal thread sleeve, the internal thread sleeve penetrates through the box bottom of the box body and the partition beam in a first preset direction, and the first preset direction is a linear direction perpendicular to the box bottom surface of the box body; a first through hole is formed in the box bottom of the box body in the first preset direction in a penetrating mode. A second through hole is formed in the partition beam in the first preset direction in a penetrating mode. One end of the internal thread sleeve is embedded in the first through hole and is in interference fit with the first through hole; according to the utility model, the flange is arranged at one end of the internal thread sleeve and is embedded in the counter bore, so that a limiting structure is conveniently formed through the matching of the flange and the counter bore, the internal thread sleeve is not easy to fall off from the separation beam, and the connection stability between the battery pack and the vehicle is further improved; and the application stability and safety of the power battery system in a commercial vehicle are effectively improved.

Description

Technical Field

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

[0002] With the development of the new energy industry, lithium batteries have been applied to passenger cars in the early stage, and now commercial vehicles (light trucks, heavy trucks) are also gradually promoting electrification. Compared with passenger cars, the operating conditions of commercial vehicles are worse, and higher requirements are placed on the stability of power batteries. On the premise of ensuring the improvement of the power or energy density of power batteries, the stability of power batteries is also particularly important, especially the stability of the mechanical structure.

[0003] The utility model with the publication (announcement) number of CN219626790U discloses a box body, a box body assembly, a battery and an electrical equipment. The box body includes a box body and a mounting structure, and further includes a partition beam. The partition beam is located inside the box body and is arranged on the end wall. When observing along the thickness direction of the end wall, the mounting structure overlaps with the partition beam; the mounting structure includes a mounting member installed on the end wall, a part of the mounting member is embedded in the end wall, and the other part is connected to the partition beam; the mounting member is welded to the partition beam; the mounting member is a sleeve, and the sleeve has an internal thread.

[0004] In the above technical solution, in actual use, especially in an environment with relatively harsh operating conditions, the welding point between the sleeve and the partition beam may be welded open due to continuous vibration and impact. This welding open phenomenon will cause the sleeve to fall off from the box body, thereby affecting the connection stability between the battery pack and the vehicle, and ultimately may threaten the safety of the entire vehicle power battery system. Summary of the Utility Model

[0005] In view of this, the utility model provides a battery fixing structure and a battery pack system. By providing a flange at one end of the internal thread sleeve, and the flange is embedded in a counterbore, it is convenient to form a limiting structure through the cooperation of the flange and the counterbore, so that the internal thread sleeve is not easily detached from the partition beam, thereby improving the connection stability between the battery pack and the vehicle, and effectively enhancing the application stability and safety of the power battery system in commercial vehicles.

[0006] The technical solution of the utility model is realized as follows:

[0007] On the one hand, the utility model provides a battery fixing structure, including a box body, a partition beam and an internal thread sleeve, wherein,

[0008] The partition beam is fixed on the bottom of the box body of the box body;

[0009] The internal thread sleeve penetrates through the bottom of the box body and the partition beam along a first preset direction, and the first preset direction is a linear direction perpendicular to the bottom surface of the box body;

[0010] A first through hole is provided on the bottom of the box body in a penetrating manner along the first preset direction;

[0011] A second through hole is provided on the partition beam in a penetrating manner along the first preset direction;

[0012] One end of the internal thread sleeve is embedded in the first through hole and has an interference fit, and the other end is embedded in the second through hole and has an interference fit;

[0013] A counterbore is provided at one end of the second through hole, and a flange is provided at one end of the internal thread sleeve, and the flange is embedded in the counterbore.

[0014] On the basis of the above technical solutions, preferably, the thickness of the flange is less than or equal to the hole depth of the counterbore.

[0015] On the basis of the above technical solutions, preferably, the end of the internal thread sleeve away from the flange is aligned with the bottom surface of the box body outside the box.

[0016] On the basis of the above technical solutions, preferably, a threaded hole is axially provided at the end of the internal thread sleeve away from the flange, wherein,

[0017] The threaded hole is a blind hole.

[0018] On the basis of the above technical solutions, preferably, a ring groove is provided on the side of the end of the internal thread sleeve away from the flange, wherein,

[0019] A sealing ring is sleeved on the ring groove.

[0020] On the basis of the above technical solutions, preferably, a weight-reducing hole is provided on the partition beam.

[0021] On the basis of the above technical solutions, preferably, a battery cell mounting hole is provided at the end of the partition beam away from the bottom of the box body.

[0022] On the basis of the above technical solutions, preferably, a welding groove is provided on the side of the partition beam.

[0023] On the other hand, the present utility model further provides a battery pack system, including the above battery fixing structure, and further including a box cover and a battery cell assembly, wherein,

[0024] The box cover is detachably arranged on the box opening of the box body;

[0025] The battery cell assembly is disposed inside the box body and is detachably disposed on the partition beam.

[0026] Based on the above technical solutions, preferably, a gasket is further included, wherein,

[0027] The gasket is clamped between the box cover and the box body.

[0028] A battery fixing structure and a battery pack system of the present utility model have the following beneficial effects compared with the prior art:

[0029] (1) By providing a flange at one end of the internal thread sleeve and inlaying the flange in the counterbore, it is convenient to form a limiting structure through the cooperation of the flange and the counterbore, so that the internal thread sleeve is not easily detached from the partition beam, thereby improving the connection stability between the battery pack and the vehicle, and effectively enhancing the application stability and safety of the power battery system in commercial vehicles.

[0030] (2) By axially providing a threaded hole at the end of the internal thread sleeve away from the flange, and the threaded hole is a blind hole, the connection bolt between the battery pack and the vehicle will not extend into the box body and will not pierce the battery cell assembly, and it is relatively safe during assembly.

[0031] (3) By providing an annular groove on the side of the end of the internal thread sleeve away from the flange, and a sealing ring is sleeved on the annular groove, it is beneficial to the sealing between the internal thread sleeve and the first through hole, and improves the waterproof ability of the battery pack.

[0032] (4) By providing a weight reduction hole on the partition beam, it is beneficial to reduce the weight of the battery pack to meet the lightweight requirements of the battery pack.

[0033] (5) By providing a welding groove on the side of the partition beam, it is convenient to improve the firmness of the partition beam after welding through the welding groove. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 Is a perspective view of a battery fixing structure of the present utility model;

[0036] Figure 2 Is a front view of a battery fixing structure of the present utility model;

[0037] Figure 3 Of the present utility modelFigure 2 Cross-sectional view taken along the A-A direction;

[0038] Figure 4 This is for the Figure 3 Enlarged view of point A;

[0039] Figure 5 This is a three-dimensional view of the internal thread sleeve of the present utility model;

[0040] Figure 6 This is the first-style three-dimensional view of the partition beam of the present utility model;

[0041] Figure 7 This is the second-style three-dimensional view of the partition beam of the present utility model;

[0042] Figure 8 This is a three-dimensional view of the battery pack system of the present utility model;

[0043] Figure 9 This is a three-dimensional view at the battery cell assembly of the present utility model;

[0044] In the figure: 1, box body; 2, partition beam; 3, internal thread sleeve; 4, box cover; 5, battery cell assembly; 6, gasket; 101, first through hole; 201, second through hole; 202, counterbore; 203, weight reduction hole; 204, battery cell installation hole; 205, welding groove; 301, flange; 302, threaded hole; 303, annular groove. Detailed implementation manners

[0045] Next, in combination with the specific implementation manners of the present utility model, the technical solutions in the present utility model will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present utility model, rather than all of the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present utility model.

[0046] As Figure 1-7 shown, a battery fixing structure of the present utility model includes a box body 1, a partition beam 2, and an internal thread sleeve 3.

[0047] Among them, the box body 1 has two structural styles, high and low, Figure 8 The high box body is shown in Figure 9 The low box body is shown in. During application, the high box body or the low box body can be selected according to needs.

[0048] A number of mutually parallel partition beams 2 are welded on the bottom of the box body 1 inside to carry the battery cell assembly 5. Among them, the partition beam 2 includes two styles, Figure 6 The first style of the partition beam 2 is shown in Figure 7Shown is the second style of the partition beam 2. The main structures of the two styles are rectangular plates. The difference is that a number of welding groove 205 are provided on the side of the partition beam 2 of the second style. During welding, the welding strength between the partition beam 2 and the box body 1 can be increased through the welding groove 205.

[0049] In addition, weight-reducing holes 203 are provided on the partition beam 2 of both styles. Among them, as Figure 6 shown, the weight-reducing holes 203 penetrate through the partition beam 2 along a straight line parallel to the bottom surface of the box body 1 of the battery pack. The self-weight of the battery pack is reduced through the weight-reducing holes 203 to meet the lightweight requirements of the battery pack.

[0050] As Figure 6 shown, an electrode installation hole 204 is also provided at one end of the partition beam 2 away from the bottom surface of the box body 1 of the battery pack. The electrode installation hole 204 is an internal threaded hole. When installing the electrode assembly 5, the electrode assembly 5 is placed on the partition beam 2, and then the electrode assembly 5 is fixed on the partition beam 2 using bolts. During fixation, the bolts are screwed into the electrode installation hole 204.

[0051] The internal threaded sleeve 3 penetrates through the bottom of the box body 1 of the battery pack and the partition beam 2 along a first preset direction. The first preset direction is a straight line perpendicular to the bottom surface of the box body 1 of the battery pack. Among them, as Figure 3 shown, one end of the internal threaded sleeve 3 away from the flange 301 is aligned with the bottom surface of the box body 1 outside the battery pack. As Figure 4 shown, a threaded hole 302 is axially provided at one end of the internal threaded sleeve 3 away from the flange 301. Among them, the threaded hole 302 is a blind hole for connecting to the vehicle frame so that the box body 1 is fixed on the vehicle. Since the threaded hole 302 is a blind hole, the connection bolts between the battery pack and the vehicle will not extend into the box body 1, so the electrode assembly 5 will not be stabbed, and the assembly is relatively safe.

[0052] To improve the stability of the internal threaded sleeve 3, as Figure 4 shown, a first through hole 101 is provided on the bottom of the box body 1 of the battery pack in a penetrating manner along the first preset direction, and a second through hole 201 is provided on the partition beam 2 in a penetrating manner along the first preset direction. One end of the internal threaded sleeve 3 is embedded in the first through hole 101 and has an interference fit, and the other end is embedded in the second through hole 201 and has an interference fit. At the same time, a counterbore 202 is provided at one end of the second through hole 201, and a flange 301 is provided at one end of the internal threaded sleeve 3. The flange 301 is embedded in the counterbore 202. In this structure, a limiting structure is formed through the cooperation of the flange 301 and the counterbore 202, so that the internal threaded sleeve 3 is not easily detached from the partition beam 2, thereby improving the connection stability between the battery pack and the vehicle, and effectively improving the application stability and safety of the power battery system in commercial vehicles.

[0053] In the above structure, the internal threaded sleeve 3 is press-fitted on the partition beam 2 by a press, effectively improving the manufacturing efficiency of the box body 1.

[0054] Meanwhile, in the above structure, the thickness of the flange 301 is less than or equal to the hole depth of the counterbore 202. Therefore, after the internal thread sleeve 3 is installed, the flange 301 is located inside the counterbore 202 and does not affect the flatness of the surface of the partition beam 2. When the battery cell assembly 5 is placed on the partition beam 2, it is relatively flat.

[0055] In addition, to prevent water leakage from the gap between the internal thread sleeve 3 and the first through hole 101, as Figure 5 shown, a ring groove 303 is provided on the side of the end of the internal thread sleeve 3 away from the flange 301. A sealing ring is sleeved on the ring groove 303, which is not shown in the sealing ring illustration. When one end of the internal thread sleeve 3 is embedded in the first through hole 101, the sealing ring abuts against the hole wall of the first through hole 101 to achieve sealing, thereby improving the waterproof ability of the battery pack.

[0056] As Figure 8-9 shown, a battery pack system of the present utility model includes the above battery fixing structure, and further includes a box cover 4, a battery cell assembly 5 and a gasket 6. Among them, one of the low box body and the high box body is selected for use. Figure 8 What is shown in Figure 9 is the battery pack system after using the high box body, Figure 9 and what is shown in

[0057] is a partial structure of the battery pack system after using the low box body. The box cover 4 and the gasket 6 are not drawn in Figure 8 . As

[0058] shown, the box cover 4 is detachably arranged on the box opening of the box body 1 through bolts; the battery cell assembly 5 is arranged inside the box body 1 and is detachably arranged on the partition beam 2 through bolts.

[0059] The above battery pack system is installed on the vehicle through bolts. During installation, bolts are installed on the vehicle, and then the bolts are screwed and tightened with the threaded holes 302 at one end of the internal thread sleeve 3 to fix the battery pack system on the vehicle.

[0060] The using method of a battery fixing structure and a battery pack system of the present utility model is as follows:

[0061] When processing the box body 1, a first through hole 101 is drilled at the bottom of the box body 1, and then holes are drilled on the partition beam 2 to make a second through hole 201 and a counterbore 202. After that, the partition beam 2 is welded to the bottom of the box body 1 of the box body 1. After welding, the first through hole 101 and the second through hole 201 are concentric. Then, the internal thread sleeve 3 is placed in the second through hole 201, and a pressure machine is used to press one end of the internal thread sleeve 3 into the first through hole 101 and press the flange 301 into the counterbore 202.

[0062] When assembling the battery pack system, the battery cell assembly 5 is fixed on the partition beam 2 by bolts. After connecting the wiring harness, a gasket 6 is placed on the opening of the box body 1, and then the box cover 4 is fixed on the opening of the box body 1 by bolts.

[0063] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A battery fixing structure, comprising a box body (1), a partition beam (2) and an internally threaded sleeve (3), wherein, the partition beam (2) is fixed on the bottom of the box body (1); the internally threaded sleeve (3) penetrates through the bottom of the box body (1) and the partition beam (2) along a first preset direction, and the first preset direction is a linear direction perpendicular to the bottom surface of the box body (1); it is characterized in that: a first through hole (101) is provided on the bottom of the box body (1) and penetrates along the first preset direction; a second through hole (201) is provided on the partition beam (2) and penetrates along the first preset direction; one end of the internally threaded sleeve (3) is embedded in the first through hole (101) and is in interference fit, and the other end is embedded in the second through hole (201) and is in interference fit; a counterbore (202) is provided at one end of the second through hole (201), a flange (301) is provided at one end of the internally threaded sleeve (3), and the flange (301) is embedded in the counterbore (202); 2. The battery fixing structure according to claim 1, characterized in that: the thickness of the flange (301) is less than or equal to the hole depth of the counterbore (202); 3. A battery fixing structure according to claim 1, characterized in that: the end of the internally threaded sleeve (3) away from the flange (301) is aligned with the bottom surface of the outside of the box body (1); 4. A battery fixing structure according to claim 1, characterized in that: a threaded hole (302) is provided axially on the end of the internally threaded sleeve (3) away from the flange (301), wherein, the threaded hole (302) is a blind hole; 5. A battery fixing structure according to claim 1, characterized in that: a ring groove (303) is provided on the side of the end of the internally threaded sleeve (3) away from the flange (301), wherein, a sealing ring is sleeved on the ring groove (303); 6. The battery fixing structure according to claim 1, wherein: a weight-reducing hole (203) is provided on the partition beam (2); 7. A battery fixing structure according to claim 1, characterized in that: a battery cell mounting hole (204) is provided at one end of the partition beam (2) away from the bottom of the box body (1); 8. A battery fixing structure according to claim 1, characterized in that: a welding groove (205) is provided on the side of the partition beam (2); 9. A battery pack system, characterized in that: including the battery fixing structure according to any one of claims 1-8, further comprising a box cover (4) and a battery cell assembly (5), wherein, the box cover (4) is detachably provided on the box opening of the box body (1); the battery cell assembly (5) is provided inside the box body (1) and is detachably provided on the partition beam (2); 10. A battery pack system according to claim 9, characterized in that: further comprising a sealing gasket (6), wherein, the sealing gasket (6) is clamped between the box cover (4) and the box body (1).

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